blob: 847107ef0cce52c65c4ff1f1aeaab6a1b4540922 [file] [log] [blame]
Sam Bradshaw88523a62011-08-30 08:34:26 -06001/*
2 * Driver for the Micron P320 SSD
3 * Copyright (C) 2011 Micron Technology, Inc.
4 *
5 * Portions of this code were derived from works subjected to the
6 * following copyright:
7 * Copyright (C) 2009 Integrated Device Technology, Inc.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 */
20
21#include <linux/pci.h>
22#include <linux/interrupt.h>
23#include <linux/ata.h>
24#include <linux/delay.h>
25#include <linux/hdreg.h>
26#include <linux/uaccess.h>
27#include <linux/random.h>
28#include <linux/smp.h>
29#include <linux/compat.h>
30#include <linux/fs.h>
Jens Axboe0e838c62011-09-28 07:35:40 -060031#include <linux/module.h>
Sam Bradshaw88523a62011-08-30 08:34:26 -060032#include <linux/genhd.h>
33#include <linux/blkdev.h>
34#include <linux/bio.h>
35#include <linux/dma-mapping.h>
36#include <linux/idr.h>
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +010037#include <linux/kthread.h>
Sam Bradshaw88523a62011-08-30 08:34:26 -060038#include <../drivers/ata/ahci.h>
Asai Thambi S P45038362012-04-09 08:35:38 +020039#include <linux/export.h>
Asai Thambi S P7b421d22012-06-04 12:44:02 -070040#include <linux/debugfs.h>
Sam Bradshaw88523a62011-08-30 08:34:26 -060041#include "mtip32xx.h"
42
43#define HW_CMD_SLOT_SZ (MTIP_MAX_COMMAND_SLOTS * 32)
44#define HW_CMD_TBL_SZ (AHCI_CMD_TBL_HDR_SZ + (MTIP_MAX_SG * 16))
45#define HW_CMD_TBL_AR_SZ (HW_CMD_TBL_SZ * MTIP_MAX_COMMAND_SLOTS)
46#define HW_PORT_PRIV_DMA_SZ \
47 (HW_CMD_SLOT_SZ + HW_CMD_TBL_AR_SZ + AHCI_RX_FIS_SZ)
48
Asai Thambi S P45038362012-04-09 08:35:38 +020049#define HOST_CAP_NZDMA (1 << 19)
Sam Bradshaw88523a62011-08-30 08:34:26 -060050#define HOST_HSORG 0xFC
51#define HSORG_DISABLE_SLOTGRP_INTR (1<<24)
52#define HSORG_DISABLE_SLOTGRP_PXIS (1<<16)
53#define HSORG_HWREV 0xFF00
54#define HSORG_STYLE 0x8
55#define HSORG_SLOTGROUPS 0x7
56
57#define PORT_COMMAND_ISSUE 0x38
58#define PORT_SDBV 0x7C
59
60#define PORT_OFFSET 0x100
61#define PORT_MEM_SIZE 0x80
62
63#define PORT_IRQ_ERR \
64 (PORT_IRQ_HBUS_ERR | PORT_IRQ_IF_ERR | PORT_IRQ_CONNECT | \
65 PORT_IRQ_PHYRDY | PORT_IRQ_UNK_FIS | PORT_IRQ_BAD_PMP | \
66 PORT_IRQ_TF_ERR | PORT_IRQ_HBUS_DATA_ERR | PORT_IRQ_IF_NONFATAL | \
67 PORT_IRQ_OVERFLOW)
68#define PORT_IRQ_LEGACY \
69 (PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS)
70#define PORT_IRQ_HANDLED \
71 (PORT_IRQ_SDB_FIS | PORT_IRQ_LEGACY | \
72 PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR | \
73 PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)
74#define DEF_PORT_IRQ \
75 (PORT_IRQ_ERR | PORT_IRQ_LEGACY | PORT_IRQ_SDB_FIS)
76
77/* product numbers */
78#define MTIP_PRODUCT_UNKNOWN 0x00
79#define MTIP_PRODUCT_ASICFPGA 0x11
80
81/* Device instance number, incremented each time a device is probed. */
82static int instance;
83
Asai Thambi S P0caff002013-04-03 19:56:21 +053084struct list_head online_list;
85struct list_head removing_list;
86spinlock_t dev_lock;
87
Sam Bradshaw88523a62011-08-30 08:34:26 -060088/*
89 * Global variable used to hold the major block device number
90 * allocated in mtip_init().
91 */
Jens Axboe3ff147d2011-09-27 21:33:53 -060092static int mtip_major;
Asai Thambi S P7b421d22012-06-04 12:44:02 -070093static struct dentry *dfs_parent;
Asai Thambi S P0caff002013-04-03 19:56:21 +053094static struct dentry *dfs_device_status;
Sam Bradshaw88523a62011-08-30 08:34:26 -060095
Asai Thambi S P16c906e52012-12-20 07:46:25 -080096static u32 cpu_use[NR_CPUS];
97
Sam Bradshaw88523a62011-08-30 08:34:26 -060098static DEFINE_SPINLOCK(rssd_index_lock);
99static DEFINE_IDA(rssd_index_ida);
100
Asai Thambi S P62ee8c12012-01-04 22:01:32 +0100101static int mtip_block_initialize(struct driver_data *dd);
102
Jens Axboe16d02c02011-09-27 15:50:01 -0600103#ifdef CONFIG_COMPAT
Sam Bradshaw88523a62011-08-30 08:34:26 -0600104struct mtip_compat_ide_task_request_s {
105 __u8 io_ports[8];
106 __u8 hob_ports[8];
107 ide_reg_valid_t out_flags;
108 ide_reg_valid_t in_flags;
109 int data_phase;
110 int req_cmd;
111 compat_ulong_t out_size;
112 compat_ulong_t in_size;
113};
Jens Axboe16d02c02011-09-27 15:50:01 -0600114#endif
Sam Bradshaw88523a62011-08-30 08:34:26 -0600115
Sam Bradshaw88523a62011-08-30 08:34:26 -0600116/*
Jens Axboe63166682011-09-27 21:27:43 -0600117 * This function check_for_surprise_removal is called
118 * while card is removed from the system and it will
119 * read the vendor id from the configration space
120 *
121 * @pdev Pointer to the pci_dev structure.
122 *
123 * return value
124 * true if device removed, else false
125 */
126static bool mtip_check_surprise_removal(struct pci_dev *pdev)
127{
128 u16 vendor_id = 0;
129
130 /* Read the vendorID from the configuration space */
131 pci_read_config_word(pdev, 0x00, &vendor_id);
132 if (vendor_id == 0xFFFF)
133 return true; /* device removed */
134
135 return false; /* device present */
136}
137
138/*
139 * This function is called for clean the pending command in the
140 * command slot during the surprise removal of device and return
141 * error to the upper layer.
142 *
143 * @dd Pointer to the DRIVER_DATA structure.
144 *
145 * return value
146 * None
147 */
148static void mtip_command_cleanup(struct driver_data *dd)
149{
150 int group = 0, commandslot = 0, commandindex = 0;
151 struct mtip_cmd *command;
152 struct mtip_port *port = dd->port;
Asai Thambi S P45038362012-04-09 08:35:38 +0200153 static int in_progress;
154
155 if (in_progress)
156 return;
157
158 in_progress = 1;
Jens Axboe63166682011-09-27 21:27:43 -0600159
160 for (group = 0; group < 4; group++) {
161 for (commandslot = 0; commandslot < 32; commandslot++) {
162 if (!(port->allocated[group] & (1 << commandslot)))
163 continue;
164
165 commandindex = group << 5 | commandslot;
166 command = &port->commands[commandindex];
167
168 if (atomic_read(&command->active)
169 && (command->async_callback)) {
170 command->async_callback(command->async_data,
171 -ENODEV);
172 command->async_callback = NULL;
173 command->async_data = NULL;
174 }
175
176 dma_unmap_sg(&port->dd->pdev->dev,
177 command->sg,
178 command->scatter_ents,
179 command->direction);
180 }
181 }
182
183 up(&port->cmd_slot);
184
Asai Thambi S P8a857a82012-04-09 08:35:38 +0200185 set_bit(MTIP_DDF_CLEANUP_BIT, &dd->dd_flag);
Asai Thambi S P45038362012-04-09 08:35:38 +0200186 in_progress = 0;
Jens Axboe63166682011-09-27 21:27:43 -0600187}
188
189/*
Sam Bradshaw88523a62011-08-30 08:34:26 -0600190 * Obtain an empty command slot.
191 *
192 * This function needs to be reentrant since it could be called
193 * at the same time on multiple CPUs. The allocation of the
194 * command slot must be atomic.
195 *
196 * @port Pointer to the port data structure.
197 *
198 * return value
199 * >= 0 Index of command slot obtained.
200 * -1 No command slots available.
201 */
202static int get_slot(struct mtip_port *port)
203{
204 int slot, i;
205 unsigned int num_command_slots = port->dd->slot_groups * 32;
206
207 /*
208 * Try 10 times, because there is a small race here.
209 * that's ok, because it's still cheaper than a lock.
210 *
211 * Race: Since this section is not protected by lock, same bit
212 * could be chosen by different process contexts running in
213 * different processor. So instead of costly lock, we are going
214 * with loop.
215 */
216 for (i = 0; i < 10; i++) {
217 slot = find_next_zero_bit(port->allocated,
218 num_command_slots, 1);
219 if ((slot < num_command_slots) &&
220 (!test_and_set_bit(slot, port->allocated)))
221 return slot;
222 }
223 dev_warn(&port->dd->pdev->dev, "Failed to get a tag.\n");
224
225 if (mtip_check_surprise_removal(port->dd->pdev)) {
226 /* Device not present, clean outstanding commands */
227 mtip_command_cleanup(port->dd);
228 }
229 return -1;
230}
231
232/*
233 * Release a command slot.
234 *
235 * @port Pointer to the port data structure.
236 * @tag Tag of command to release
237 *
238 * return value
239 * None
240 */
241static inline void release_slot(struct mtip_port *port, int tag)
242{
243 smp_mb__before_clear_bit();
244 clear_bit(tag, port->allocated);
245 smp_mb__after_clear_bit();
246}
247
248/*
Jens Axboe63166682011-09-27 21:27:43 -0600249 * Reset the HBA (without sleeping)
250 *
Jens Axboe63166682011-09-27 21:27:43 -0600251 * @dd Pointer to the driver data structure.
252 *
253 * return value
254 * 0 The reset was successful.
255 * -1 The HBA Reset bit did not clear.
256 */
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +0530257static int mtip_hba_reset(struct driver_data *dd)
Jens Axboe63166682011-09-27 21:27:43 -0600258{
259 unsigned long timeout;
260
Jens Axboe63166682011-09-27 21:27:43 -0600261 /* Set the reset bit */
262 writel(HOST_RESET, dd->mmio + HOST_CTL);
263
264 /* Flush */
265 readl(dd->mmio + HOST_CTL);
266
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +0530267 /* Spin for up to 2 seconds, waiting for reset acknowledgement */
268 timeout = jiffies + msecs_to_jiffies(2000);
269 do {
270 mdelay(10);
271 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))
272 return -1;
Jens Axboe63166682011-09-27 21:27:43 -0600273
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +0530274 } while ((readl(dd->mmio + HOST_CTL) & HOST_RESET)
275 && time_before(jiffies, timeout));
Asai Thambi S P45038362012-04-09 08:35:38 +0200276
Jens Axboe63166682011-09-27 21:27:43 -0600277 if (readl(dd->mmio + HOST_CTL) & HOST_RESET)
278 return -1;
279
280 return 0;
281}
282
283/*
Sam Bradshaw88523a62011-08-30 08:34:26 -0600284 * Issue a command to the hardware.
285 *
286 * Set the appropriate bit in the s_active and Command Issue hardware
287 * registers, causing hardware command processing to begin.
288 *
289 * @port Pointer to the port structure.
290 * @tag The tag of the command to be issued.
291 *
292 * return value
293 * None
294 */
295static inline void mtip_issue_ncq_command(struct mtip_port *port, int tag)
296{
Asai Thambi S P16c906e52012-12-20 07:46:25 -0800297 int group = tag >> 5;
298
Sam Bradshaw88523a62011-08-30 08:34:26 -0600299 atomic_set(&port->commands[tag].active, 1);
300
Asai Thambi S P16c906e52012-12-20 07:46:25 -0800301 /* guard SACT and CI registers */
302 spin_lock(&port->cmd_issue_lock[group]);
Sam Bradshaw88523a62011-08-30 08:34:26 -0600303 writel((1 << MTIP_TAG_BIT(tag)),
304 port->s_active[MTIP_TAG_INDEX(tag)]);
305 writel((1 << MTIP_TAG_BIT(tag)),
306 port->cmd_issue[MTIP_TAG_INDEX(tag)]);
Asai Thambi S P16c906e52012-12-20 07:46:25 -0800307 spin_unlock(&port->cmd_issue_lock[group]);
Asai Thambi S Pdad40f12012-04-09 08:35:38 +0200308
309 /* Set the command's timeout value.*/
310 port->commands[tag].comp_time = jiffies + msecs_to_jiffies(
311 MTIP_NCQ_COMMAND_TIMEOUT_MS);
Sam Bradshaw88523a62011-08-30 08:34:26 -0600312}
313
314/*
Jens Axboe63166682011-09-27 21:27:43 -0600315 * Enable/disable the reception of FIS
316 *
317 * @port Pointer to the port data structure
318 * @enable 1 to enable, 0 to disable
319 *
320 * return value
321 * Previous state: 1 enabled, 0 disabled
322 */
323static int mtip_enable_fis(struct mtip_port *port, int enable)
324{
325 u32 tmp;
326
327 /* enable FIS reception */
328 tmp = readl(port->mmio + PORT_CMD);
329 if (enable)
330 writel(tmp | PORT_CMD_FIS_RX, port->mmio + PORT_CMD);
331 else
332 writel(tmp & ~PORT_CMD_FIS_RX, port->mmio + PORT_CMD);
333
334 /* Flush */
335 readl(port->mmio + PORT_CMD);
336
337 return (((tmp & PORT_CMD_FIS_RX) == PORT_CMD_FIS_RX));
338}
339
340/*
341 * Enable/disable the DMA engine
342 *
343 * @port Pointer to the port data structure
344 * @enable 1 to enable, 0 to disable
345 *
346 * return value
347 * Previous state: 1 enabled, 0 disabled.
348 */
349static int mtip_enable_engine(struct mtip_port *port, int enable)
350{
351 u32 tmp;
352
353 /* enable FIS reception */
354 tmp = readl(port->mmio + PORT_CMD);
355 if (enable)
356 writel(tmp | PORT_CMD_START, port->mmio + PORT_CMD);
357 else
358 writel(tmp & ~PORT_CMD_START, port->mmio + PORT_CMD);
359
360 readl(port->mmio + PORT_CMD);
361 return (((tmp & PORT_CMD_START) == PORT_CMD_START));
362}
363
364/*
365 * Enables the port DMA engine and FIS reception.
366 *
367 * return value
368 * None
369 */
370static inline void mtip_start_port(struct mtip_port *port)
371{
372 /* Enable FIS reception */
373 mtip_enable_fis(port, 1);
374
375 /* Enable the DMA engine */
376 mtip_enable_engine(port, 1);
377}
378
379/*
380 * Deinitialize a port by disabling port interrupts, the DMA engine,
381 * and FIS reception.
382 *
383 * @port Pointer to the port structure
384 *
385 * return value
386 * None
387 */
388static inline void mtip_deinit_port(struct mtip_port *port)
389{
390 /* Disable interrupts on this port */
391 writel(0, port->mmio + PORT_IRQ_MASK);
392
393 /* Disable the DMA engine */
394 mtip_enable_engine(port, 0);
395
396 /* Disable FIS reception */
397 mtip_enable_fis(port, 0);
398}
399
400/*
401 * Initialize a port.
402 *
403 * This function deinitializes the port by calling mtip_deinit_port() and
404 * then initializes it by setting the command header and RX FIS addresses,
405 * clearing the SError register and any pending port interrupts before
406 * re-enabling the default set of port interrupts.
407 *
408 * @port Pointer to the port structure.
409 *
410 * return value
411 * None
412 */
413static void mtip_init_port(struct mtip_port *port)
414{
415 int i;
416 mtip_deinit_port(port);
417
418 /* Program the command list base and FIS base addresses */
419 if (readl(port->dd->mmio + HOST_CAP) & HOST_CAP_64) {
420 writel((port->command_list_dma >> 16) >> 16,
421 port->mmio + PORT_LST_ADDR_HI);
422 writel((port->rxfis_dma >> 16) >> 16,
423 port->mmio + PORT_FIS_ADDR_HI);
424 }
425
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +0100426 writel(port->command_list_dma & 0xFFFFFFFF,
Jens Axboe63166682011-09-27 21:27:43 -0600427 port->mmio + PORT_LST_ADDR);
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +0100428 writel(port->rxfis_dma & 0xFFFFFFFF, port->mmio + PORT_FIS_ADDR);
Jens Axboe63166682011-09-27 21:27:43 -0600429
430 /* Clear SError */
431 writel(readl(port->mmio + PORT_SCR_ERR), port->mmio + PORT_SCR_ERR);
432
433 /* reset the completed registers.*/
434 for (i = 0; i < port->dd->slot_groups; i++)
435 writel(0xFFFFFFFF, port->completed[i]);
436
437 /* Clear any pending interrupts for this port */
Asai Thambi S P6bb688c2012-05-29 18:40:45 -0700438 writel(readl(port->mmio + PORT_IRQ_STAT), port->mmio + PORT_IRQ_STAT);
Jens Axboe63166682011-09-27 21:27:43 -0600439
Asai Thambi S P22be2e62012-03-23 12:33:03 +0100440 /* Clear any pending interrupts on the HBA. */
441 writel(readl(port->dd->mmio + HOST_IRQ_STAT),
442 port->dd->mmio + HOST_IRQ_STAT);
443
Jens Axboe63166682011-09-27 21:27:43 -0600444 /* Enable port interrupts */
445 writel(DEF_PORT_IRQ, port->mmio + PORT_IRQ_MASK);
446}
447
448/*
449 * Restart a port
450 *
451 * @port Pointer to the port data structure.
452 *
453 * return value
454 * None
455 */
456static void mtip_restart_port(struct mtip_port *port)
457{
458 unsigned long timeout;
459
460 /* Disable the DMA engine */
461 mtip_enable_engine(port, 0);
462
463 /* Chip quirk: wait up to 500ms for PxCMD.CR == 0 */
464 timeout = jiffies + msecs_to_jiffies(500);
465 while ((readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON)
466 && time_before(jiffies, timeout))
467 ;
468
Asai Thambi S P8a857a82012-04-09 08:35:38 +0200469 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
Asai Thambi S P45038362012-04-09 08:35:38 +0200470 return;
471
Jens Axboe63166682011-09-27 21:27:43 -0600472 /*
473 * Chip quirk: escalate to hba reset if
474 * PxCMD.CR not clear after 500 ms
475 */
476 if (readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON) {
477 dev_warn(&port->dd->pdev->dev,
478 "PxCMD.CR not clear, escalating reset\n");
479
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +0530480 if (mtip_hba_reset(port->dd))
Jens Axboe63166682011-09-27 21:27:43 -0600481 dev_err(&port->dd->pdev->dev,
482 "HBA reset escalation failed.\n");
483
484 /* 30 ms delay before com reset to quiesce chip */
485 mdelay(30);
486 }
487
488 dev_warn(&port->dd->pdev->dev, "Issuing COM reset\n");
489
490 /* Set PxSCTL.DET */
491 writel(readl(port->mmio + PORT_SCR_CTL) |
492 1, port->mmio + PORT_SCR_CTL);
493 readl(port->mmio + PORT_SCR_CTL);
494
495 /* Wait 1 ms to quiesce chip function */
496 timeout = jiffies + msecs_to_jiffies(1);
497 while (time_before(jiffies, timeout))
498 ;
499
Asai Thambi S P8a857a82012-04-09 08:35:38 +0200500 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
Asai Thambi S P45038362012-04-09 08:35:38 +0200501 return;
502
Jens Axboe63166682011-09-27 21:27:43 -0600503 /* Clear PxSCTL.DET */
504 writel(readl(port->mmio + PORT_SCR_CTL) & ~1,
505 port->mmio + PORT_SCR_CTL);
506 readl(port->mmio + PORT_SCR_CTL);
507
508 /* Wait 500 ms for bit 0 of PORT_SCR_STS to be set */
509 timeout = jiffies + msecs_to_jiffies(500);
510 while (((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0)
511 && time_before(jiffies, timeout))
512 ;
513
Asai Thambi S P8a857a82012-04-09 08:35:38 +0200514 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
Asai Thambi S P45038362012-04-09 08:35:38 +0200515 return;
516
Jens Axboe63166682011-09-27 21:27:43 -0600517 if ((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0)
518 dev_warn(&port->dd->pdev->dev,
519 "COM reset failed\n");
520
Asai Thambi S P22be2e62012-03-23 12:33:03 +0100521 mtip_init_port(port);
522 mtip_start_port(port);
Jens Axboe63166682011-09-27 21:27:43 -0600523
Jens Axboe63166682011-09-27 21:27:43 -0600524}
525
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +0530526static int mtip_device_reset(struct driver_data *dd)
527{
528 int rv = 0;
529
530 if (mtip_check_surprise_removal(dd->pdev))
531 return 0;
532
533 if (mtip_hba_reset(dd) < 0)
534 rv = -EFAULT;
535
536 mdelay(1);
537 mtip_init_port(dd->port);
538 mtip_start_port(dd->port);
539
540 /* Enable interrupts on the HBA. */
541 writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN,
542 dd->mmio + HOST_CTL);
543 return rv;
544}
545
Jens Axboe63166682011-09-27 21:27:43 -0600546/*
Asai Thambi S P95fea2f12012-04-09 08:35:39 +0200547 * Helper function for tag logging
548 */
549static void print_tags(struct driver_data *dd,
550 char *msg,
551 unsigned long *tagbits,
552 int cnt)
553{
554 unsigned char tagmap[128];
555 int group, tagmap_len = 0;
556
557 memset(tagmap, 0, sizeof(tagmap));
558 for (group = SLOTBITS_IN_LONGS; group > 0; group--)
559 tagmap_len = sprintf(tagmap + tagmap_len, "%016lX ",
560 tagbits[group-1]);
561 dev_warn(&dd->pdev->dev,
562 "%d command(s) %s: tagmap [%s]", cnt, msg, tagmap);
563}
564
565/*
Sam Bradshaw88523a62011-08-30 08:34:26 -0600566 * Called periodically to see if any read/write commands are
567 * taking too long to complete.
568 *
569 * @data Pointer to the PORT data structure.
570 *
571 * return value
572 * None
573 */
Jens Axboe63166682011-09-27 21:27:43 -0600574static void mtip_timeout_function(unsigned long int data)
Sam Bradshaw88523a62011-08-30 08:34:26 -0600575{
576 struct mtip_port *port = (struct mtip_port *) data;
577 struct host_to_dev_fis *fis;
578 struct mtip_cmd *command;
579 int tag, cmdto_cnt = 0;
580 unsigned int bit, group;
Wei Yongjun298d8012012-11-08 17:35:38 +0800581 unsigned int num_command_slots;
Asai Thambi S P95fea2f12012-04-09 08:35:39 +0200582 unsigned long to, tagaccum[SLOTBITS_IN_LONGS];
Sam Bradshaw88523a62011-08-30 08:34:26 -0600583
584 if (unlikely(!port))
585 return;
586
Asai Thambi S P8a857a82012-04-09 08:35:38 +0200587 if (test_bit(MTIP_DDF_RESUME_BIT, &port->dd->dd_flag)) {
Sam Bradshaw88523a62011-08-30 08:34:26 -0600588 mod_timer(&port->cmd_timer,
589 jiffies + msecs_to_jiffies(30000));
590 return;
591 }
Asai Thambi S P95fea2f12012-04-09 08:35:39 +0200592 /* clear the tag accumulator */
593 memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long));
Wei Yongjun298d8012012-11-08 17:35:38 +0800594 num_command_slots = port->dd->slot_groups * 32;
Sam Bradshaw88523a62011-08-30 08:34:26 -0600595
596 for (tag = 0; tag < num_command_slots; tag++) {
597 /*
598 * Skip internal command slot as it has
599 * its own timeout mechanism
600 */
601 if (tag == MTIP_TAG_INTERNAL)
602 continue;
603
604 if (atomic_read(&port->commands[tag].active) &&
605 (time_after(jiffies, port->commands[tag].comp_time))) {
606 group = tag >> 5;
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +0100607 bit = tag & 0x1F;
Sam Bradshaw88523a62011-08-30 08:34:26 -0600608
609 command = &port->commands[tag];
610 fis = (struct host_to_dev_fis *) command->command;
611
Asai Thambi S P95fea2f12012-04-09 08:35:39 +0200612 set_bit(tag, tagaccum);
Sam Bradshaw88523a62011-08-30 08:34:26 -0600613 cmdto_cnt++;
614 if (cmdto_cnt == 1)
Asai Thambi S P8a857a82012-04-09 08:35:38 +0200615 set_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
Sam Bradshaw88523a62011-08-30 08:34:26 -0600616
617 /*
618 * Clear the completed bit. This should prevent
619 * any interrupt handlers from trying to retire
620 * the command.
621 */
622 writel(1 << bit, port->completed[group]);
623
624 /* Call the async completion callback. */
625 if (likely(command->async_callback))
626 command->async_callback(command->async_data,
627 -EIO);
628 command->async_callback = NULL;
629 command->comp_func = NULL;
630
631 /* Unmap the DMA scatter list entries */
632 dma_unmap_sg(&port->dd->pdev->dev,
633 command->sg,
634 command->scatter_ents,
635 command->direction);
636
637 /*
638 * Clear the allocated bit and active tag for the
639 * command.
640 */
641 atomic_set(&port->commands[tag].active, 0);
642 release_slot(port, tag);
643
644 up(&port->cmd_slot);
645 }
646 }
647
Asai Thambi S P47cd4b32013-01-11 18:46:04 +0530648 if (cmdto_cnt) {
Asai Thambi S P95fea2f12012-04-09 08:35:39 +0200649 print_tags(port->dd, "timed out", tagaccum, cmdto_cnt);
Asai Thambi S P47cd4b32013-01-11 18:46:04 +0530650 if (!test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags)) {
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +0530651 mtip_device_reset(port->dd);
Asai Thambi S P47cd4b32013-01-11 18:46:04 +0530652 wake_up_interruptible(&port->svc_wait);
653 }
Asai Thambi S P8a857a82012-04-09 08:35:38 +0200654 clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
Sam Bradshaw88523a62011-08-30 08:34:26 -0600655 }
656
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +0200657 if (port->ic_pause_timer) {
658 to = port->ic_pause_timer + msecs_to_jiffies(1000);
659 if (time_after(jiffies, to)) {
660 if (!test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags)) {
661 port->ic_pause_timer = 0;
662 clear_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags);
663 clear_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags);
664 clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
665 wake_up_interruptible(&port->svc_wait);
666 }
667
668
669 }
670 }
671
Sam Bradshaw88523a62011-08-30 08:34:26 -0600672 /* Restart the timer */
673 mod_timer(&port->cmd_timer,
674 jiffies + msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD));
675}
676
677/*
678 * IO completion function.
679 *
680 * This completion function is called by the driver ISR when a
681 * command that was issued by the kernel completes. It first calls the
682 * asynchronous completion function which normally calls back into the block
683 * layer passing the asynchronous callback data, then unmaps the
684 * scatter list associated with the completed command, and finally
685 * clears the allocated bit associated with the completed command.
686 *
687 * @port Pointer to the port data structure.
688 * @tag Tag of the command.
689 * @data Pointer to driver_data.
690 * @status Completion status.
691 *
692 * return value
693 * None
694 */
695static void mtip_async_complete(struct mtip_port *port,
696 int tag,
697 void *data,
698 int status)
699{
700 struct mtip_cmd *command;
701 struct driver_data *dd = data;
702 int cb_status = status ? -EIO : 0;
703
704 if (unlikely(!dd) || unlikely(!port))
705 return;
706
707 command = &port->commands[tag];
708
709 if (unlikely(status == PORT_IRQ_TF_ERR)) {
710 dev_warn(&port->dd->pdev->dev,
711 "Command tag %d failed due to TFE\n", tag);
712 }
713
714 /* Upper layer callback */
715 if (likely(command->async_callback))
716 command->async_callback(command->async_data, cb_status);
717
718 command->async_callback = NULL;
719 command->comp_func = NULL;
720
721 /* Unmap the DMA scatter list entries */
722 dma_unmap_sg(&dd->pdev->dev,
723 command->sg,
724 command->scatter_ents,
725 command->direction);
726
727 /* Clear the allocated and active bits for the command */
728 atomic_set(&port->commands[tag].active, 0);
729 release_slot(port, tag);
730
Asai Thambi S P2077d942013-04-29 21:19:49 +0200731 if (unlikely(command->unaligned))
732 up(&port->cmd_slot_unal);
733 else
734 up(&port->cmd_slot);
Sam Bradshaw88523a62011-08-30 08:34:26 -0600735}
736
737/*
738 * Internal command completion callback function.
739 *
740 * This function is normally called by the driver ISR when an internal
741 * command completed. This function signals the command completion by
742 * calling complete().
743 *
744 * @port Pointer to the port data structure.
745 * @tag Tag of the command that has completed.
746 * @data Pointer to a completion structure.
747 * @status Completion status.
748 *
749 * return value
750 * None
751 */
752static void mtip_completion(struct mtip_port *port,
753 int tag,
754 void *data,
755 int status)
756{
757 struct mtip_cmd *command = &port->commands[tag];
758 struct completion *waiting = data;
759 if (unlikely(status == PORT_IRQ_TF_ERR))
760 dev_warn(&port->dd->pdev->dev,
761 "Internal command %d completed with TFE\n", tag);
762
763 command->async_callback = NULL;
764 command->comp_func = NULL;
765
766 complete(waiting);
767}
768
Asai Thambi S P8182b492012-04-09 08:35:38 +0200769static void mtip_null_completion(struct mtip_port *port,
770 int tag,
771 void *data,
772 int status)
773{
774 return;
775}
776
Asai Thambi S Pf6587212012-04-09 08:35:38 +0200777static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer,
778 dma_addr_t buffer_dma, unsigned int sectors);
779static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id,
780 struct smart_attr *attrib);
Sam Bradshaw88523a62011-08-30 08:34:26 -0600781/*
782 * Handle an error.
783 *
784 * @dd Pointer to the DRIVER_DATA structure.
785 *
786 * return value
787 * None
788 */
789static void mtip_handle_tfe(struct driver_data *dd)
790{
Asai Thambi S Pf6587212012-04-09 08:35:38 +0200791 int group, tag, bit, reissue, rv;
Sam Bradshaw88523a62011-08-30 08:34:26 -0600792 struct mtip_port *port;
Asai Thambi S Pf6587212012-04-09 08:35:38 +0200793 struct mtip_cmd *cmd;
Sam Bradshaw88523a62011-08-30 08:34:26 -0600794 u32 completed;
795 struct host_to_dev_fis *fis;
796 unsigned long tagaccum[SLOTBITS_IN_LONGS];
Asai Thambi S P95fea2f12012-04-09 08:35:39 +0200797 unsigned int cmd_cnt = 0;
Asai Thambi S Pf6587212012-04-09 08:35:38 +0200798 unsigned char *buf;
799 char *fail_reason = NULL;
800 int fail_all_ncq_write = 0, fail_all_ncq_cmds = 0;
Sam Bradshaw88523a62011-08-30 08:34:26 -0600801
802 dev_warn(&dd->pdev->dev, "Taskfile error\n");
803
804 port = dd->port;
805
806 /* Stop the timer to prevent command timeouts. */
807 del_timer(&port->cmd_timer);
Asai Thambi S Pd02e1f02012-05-29 18:42:27 -0700808 set_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
809
810 if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags) &&
811 test_bit(MTIP_TAG_INTERNAL, port->allocated)) {
812 cmd = &port->commands[MTIP_TAG_INTERNAL];
813 dbg_printk(MTIP_DRV_NAME " TFE for the internal command\n");
814
815 atomic_inc(&cmd->active); /* active > 1 indicates error */
816 if (cmd->comp_data && cmd->comp_func) {
817 cmd->comp_func(port, MTIP_TAG_INTERNAL,
818 cmd->comp_data, PORT_IRQ_TF_ERR);
819 }
820 goto handle_tfe_exit;
821 }
Sam Bradshaw88523a62011-08-30 08:34:26 -0600822
Asai Thambi S P95fea2f12012-04-09 08:35:39 +0200823 /* clear the tag accumulator */
824 memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long));
825
Sam Bradshaw88523a62011-08-30 08:34:26 -0600826 /* Loop through all the groups */
827 for (group = 0; group < dd->slot_groups; group++) {
828 completed = readl(port->completed[group]);
829
830 /* clear completed status register in the hardware.*/
831 writel(completed, port->completed[group]);
832
Sam Bradshaw88523a62011-08-30 08:34:26 -0600833 /* Process successfully completed commands */
834 for (bit = 0; bit < 32 && completed; bit++) {
835 if (!(completed & (1<<bit)))
836 continue;
837 tag = (group << 5) + bit;
838
839 /* Skip the internal command slot */
840 if (tag == MTIP_TAG_INTERNAL)
841 continue;
842
Asai Thambi S Pf6587212012-04-09 08:35:38 +0200843 cmd = &port->commands[tag];
844 if (likely(cmd->comp_func)) {
Sam Bradshaw88523a62011-08-30 08:34:26 -0600845 set_bit(tag, tagaccum);
Asai Thambi S P95fea2f12012-04-09 08:35:39 +0200846 cmd_cnt++;
Asai Thambi S Pf6587212012-04-09 08:35:38 +0200847 atomic_set(&cmd->active, 0);
848 cmd->comp_func(port,
Sam Bradshaw88523a62011-08-30 08:34:26 -0600849 tag,
Asai Thambi S Pf6587212012-04-09 08:35:38 +0200850 cmd->comp_data,
Sam Bradshaw88523a62011-08-30 08:34:26 -0600851 0);
852 } else {
853 dev_err(&port->dd->pdev->dev,
854 "Missing completion func for tag %d",
855 tag);
856 if (mtip_check_surprise_removal(dd->pdev)) {
857 mtip_command_cleanup(dd);
858 /* don't proceed further */
859 return;
860 }
861 }
862 }
863 }
Asai Thambi S P95fea2f12012-04-09 08:35:39 +0200864
865 print_tags(dd, "completed (TFE)", tagaccum, cmd_cnt);
Sam Bradshaw88523a62011-08-30 08:34:26 -0600866
867 /* Restart the port */
868 mdelay(20);
869 mtip_restart_port(port);
870
Asai Thambi S Pf6587212012-04-09 08:35:38 +0200871 /* Trying to determine the cause of the error */
872 rv = mtip_read_log_page(dd->port, ATA_LOG_SATA_NCQ,
873 dd->port->log_buf,
874 dd->port->log_buf_dma, 1);
875 if (rv) {
876 dev_warn(&dd->pdev->dev,
877 "Error in READ LOG EXT (10h) command\n");
878 /* non-critical error, don't fail the load */
879 } else {
880 buf = (unsigned char *)dd->port->log_buf;
881 if (buf[259] & 0x1) {
882 dev_info(&dd->pdev->dev,
883 "Write protect bit is set.\n");
Asai Thambi S P8a857a82012-04-09 08:35:38 +0200884 set_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag);
Asai Thambi S Pf6587212012-04-09 08:35:38 +0200885 fail_all_ncq_write = 1;
886 fail_reason = "write protect";
887 }
888 if (buf[288] == 0xF7) {
889 dev_info(&dd->pdev->dev,
890 "Exceeded Tmax, drive in thermal shutdown.\n");
Asai Thambi S P8a857a82012-04-09 08:35:38 +0200891 set_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag);
Asai Thambi S Pf6587212012-04-09 08:35:38 +0200892 fail_all_ncq_cmds = 1;
893 fail_reason = "thermal shutdown";
894 }
895 if (buf[288] == 0xBF) {
896 dev_info(&dd->pdev->dev,
897 "Drive indicates rebuild has failed.\n");
898 fail_all_ncq_cmds = 1;
899 fail_reason = "rebuild failed";
900 }
901 }
902
Sam Bradshaw88523a62011-08-30 08:34:26 -0600903 /* clear the tag accumulator */
904 memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long));
905
906 /* Loop through all the groups */
907 for (group = 0; group < dd->slot_groups; group++) {
908 for (bit = 0; bit < 32; bit++) {
909 reissue = 1;
910 tag = (group << 5) + bit;
Asai Thambi S Pf6587212012-04-09 08:35:38 +0200911 cmd = &port->commands[tag];
Sam Bradshaw88523a62011-08-30 08:34:26 -0600912
913 /* If the active bit is set re-issue the command */
Asai Thambi S Pf6587212012-04-09 08:35:38 +0200914 if (atomic_read(&cmd->active) == 0)
Sam Bradshaw88523a62011-08-30 08:34:26 -0600915 continue;
916
Asai Thambi S Pf6587212012-04-09 08:35:38 +0200917 fis = (struct host_to_dev_fis *)cmd->command;
Sam Bradshaw88523a62011-08-30 08:34:26 -0600918
919 /* Should re-issue? */
920 if (tag == MTIP_TAG_INTERNAL ||
921 fis->command == ATA_CMD_SET_FEATURES)
922 reissue = 0;
Asai Thambi S Pf6587212012-04-09 08:35:38 +0200923 else {
924 if (fail_all_ncq_cmds ||
925 (fail_all_ncq_write &&
926 fis->command == ATA_CMD_FPDMA_WRITE)) {
927 dev_warn(&dd->pdev->dev,
928 " Fail: %s w/tag %d [%s].\n",
929 fis->command == ATA_CMD_FPDMA_WRITE ?
930 "write" : "read",
931 tag,
932 fail_reason != NULL ?
933 fail_reason : "unknown");
934 atomic_set(&cmd->active, 0);
935 if (cmd->comp_func) {
936 cmd->comp_func(port, tag,
937 cmd->comp_data,
938 -ENODATA);
939 }
940 continue;
941 }
942 }
Sam Bradshaw88523a62011-08-30 08:34:26 -0600943
944 /*
945 * First check if this command has
946 * exceeded its retries.
947 */
Asai Thambi S Pf6587212012-04-09 08:35:38 +0200948 if (reissue && (cmd->retries-- > 0)) {
Sam Bradshaw88523a62011-08-30 08:34:26 -0600949
950 set_bit(tag, tagaccum);
951
Sam Bradshaw88523a62011-08-30 08:34:26 -0600952 /* Re-issue the command. */
953 mtip_issue_ncq_command(port, tag);
954
955 continue;
956 }
957
958 /* Retire a command that will not be reissued */
959 dev_warn(&port->dd->pdev->dev,
960 "retiring tag %d\n", tag);
Asai Thambi S Pf6587212012-04-09 08:35:38 +0200961 atomic_set(&cmd->active, 0);
Sam Bradshaw88523a62011-08-30 08:34:26 -0600962
Asai Thambi S Pf6587212012-04-09 08:35:38 +0200963 if (cmd->comp_func)
964 cmd->comp_func(
Sam Bradshaw88523a62011-08-30 08:34:26 -0600965 port,
966 tag,
Asai Thambi S Pf6587212012-04-09 08:35:38 +0200967 cmd->comp_data,
Sam Bradshaw88523a62011-08-30 08:34:26 -0600968 PORT_IRQ_TF_ERR);
969 else
970 dev_warn(&port->dd->pdev->dev,
971 "Bad completion for tag %d\n",
972 tag);
973 }
974 }
Asai Thambi S P95fea2f12012-04-09 08:35:39 +0200975 print_tags(dd, "reissued (TFE)", tagaccum, cmd_cnt);
Sam Bradshaw88523a62011-08-30 08:34:26 -0600976
Asai Thambi S Pd02e1f02012-05-29 18:42:27 -0700977handle_tfe_exit:
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +0100978 /* clear eh_active */
Asai Thambi S P8a857a82012-04-09 08:35:38 +0200979 clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags);
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +0100980 wake_up_interruptible(&port->svc_wait);
Sam Bradshaw88523a62011-08-30 08:34:26 -0600981
982 mod_timer(&port->cmd_timer,
983 jiffies + msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD));
984}
985
986/*
987 * Handle a set device bits interrupt
988 */
Asai Thambi S P16c906e52012-12-20 07:46:25 -0800989static inline void mtip_workq_sdbfx(struct mtip_port *port, int group,
990 u32 completed)
Sam Bradshaw88523a62011-08-30 08:34:26 -0600991{
Asai Thambi S P16c906e52012-12-20 07:46:25 -0800992 struct driver_data *dd = port->dd;
993 int tag, bit;
Sam Bradshaw88523a62011-08-30 08:34:26 -0600994 struct mtip_cmd *command;
995
Asai Thambi S P16c906e52012-12-20 07:46:25 -0800996 if (!completed) {
997 WARN_ON_ONCE(!completed);
998 return;
999 }
1000 /* clear completed status register in the hardware.*/
1001 writel(completed, port->completed[group]);
Sam Bradshaw88523a62011-08-30 08:34:26 -06001002
Asai Thambi S P16c906e52012-12-20 07:46:25 -08001003 /* Process completed commands. */
1004 for (bit = 0; (bit < 32) && completed; bit++) {
1005 if (completed & 0x01) {
1006 tag = (group << 5) | bit;
Sam Bradshaw88523a62011-08-30 08:34:26 -06001007
Asai Thambi S P16c906e52012-12-20 07:46:25 -08001008 /* skip internal command slot. */
1009 if (unlikely(tag == MTIP_TAG_INTERNAL))
1010 continue;
Sam Bradshaw88523a62011-08-30 08:34:26 -06001011
Asai Thambi S P16c906e52012-12-20 07:46:25 -08001012 command = &port->commands[tag];
1013 /* make internal callback */
1014 if (likely(command->comp_func)) {
1015 command->comp_func(
1016 port,
1017 tag,
1018 command->comp_data,
1019 0);
1020 } else {
1021 dev_warn(&dd->pdev->dev,
1022 "Null completion "
1023 "for tag %d",
1024 tag);
Sam Bradshaw88523a62011-08-30 08:34:26 -06001025
Asai Thambi S P16c906e52012-12-20 07:46:25 -08001026 if (mtip_check_surprise_removal(
1027 dd->pdev)) {
1028 mtip_command_cleanup(dd);
1029 return;
Sam Bradshaw88523a62011-08-30 08:34:26 -06001030 }
1031 }
1032 }
Asai Thambi S P16c906e52012-12-20 07:46:25 -08001033 completed >>= 1;
Sam Bradshaw88523a62011-08-30 08:34:26 -06001034 }
Asai Thambi S P16c906e52012-12-20 07:46:25 -08001035
1036 /* If last, re-enable interrupts */
1037 if (atomic_dec_return(&dd->irq_workers_active) == 0)
1038 writel(0xffffffff, dd->mmio + HOST_IRQ_STAT);
Sam Bradshaw88523a62011-08-30 08:34:26 -06001039}
1040
1041/*
1042 * Process legacy pio and d2h interrupts
1043 */
1044static inline void mtip_process_legacy(struct driver_data *dd, u32 port_stat)
1045{
1046 struct mtip_port *port = dd->port;
1047 struct mtip_cmd *cmd = &port->commands[MTIP_TAG_INTERNAL];
1048
Asai Thambi S P8a857a82012-04-09 08:35:38 +02001049 if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags) &&
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01001050 (cmd != NULL) && !(readl(port->cmd_issue[MTIP_TAG_INTERNAL])
Sam Bradshaw88523a62011-08-30 08:34:26 -06001051 & (1 << MTIP_TAG_INTERNAL))) {
1052 if (cmd->comp_func) {
1053 cmd->comp_func(port,
1054 MTIP_TAG_INTERNAL,
1055 cmd->comp_data,
1056 0);
1057 return;
1058 }
1059 }
1060
Sam Bradshaw88523a62011-08-30 08:34:26 -06001061 return;
1062}
1063
1064/*
1065 * Demux and handle errors
1066 */
1067static inline void mtip_process_errors(struct driver_data *dd, u32 port_stat)
1068{
1069 if (likely(port_stat & (PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR)))
1070 mtip_handle_tfe(dd);
1071
1072 if (unlikely(port_stat & PORT_IRQ_CONNECT)) {
1073 dev_warn(&dd->pdev->dev,
1074 "Clearing PxSERR.DIAG.x\n");
1075 writel((1 << 26), dd->port->mmio + PORT_SCR_ERR);
1076 }
1077
1078 if (unlikely(port_stat & PORT_IRQ_PHYRDY)) {
1079 dev_warn(&dd->pdev->dev,
1080 "Clearing PxSERR.DIAG.n\n");
1081 writel((1 << 16), dd->port->mmio + PORT_SCR_ERR);
1082 }
1083
1084 if (unlikely(port_stat & ~PORT_IRQ_HANDLED)) {
1085 dev_warn(&dd->pdev->dev,
1086 "Port stat errors %x unhandled\n",
1087 (port_stat & ~PORT_IRQ_HANDLED));
1088 }
1089}
1090
1091static inline irqreturn_t mtip_handle_irq(struct driver_data *data)
1092{
1093 struct driver_data *dd = (struct driver_data *) data;
1094 struct mtip_port *port = dd->port;
1095 u32 hba_stat, port_stat;
1096 int rv = IRQ_NONE;
Asai Thambi S P16c906e52012-12-20 07:46:25 -08001097 int do_irq_enable = 1, i, workers;
1098 struct mtip_work *twork;
Sam Bradshaw88523a62011-08-30 08:34:26 -06001099
1100 hba_stat = readl(dd->mmio + HOST_IRQ_STAT);
1101 if (hba_stat) {
1102 rv = IRQ_HANDLED;
1103
1104 /* Acknowledge the interrupt status on the port.*/
1105 port_stat = readl(port->mmio + PORT_IRQ_STAT);
1106 writel(port_stat, port->mmio + PORT_IRQ_STAT);
1107
1108 /* Demux port status */
Asai Thambi S P16c906e52012-12-20 07:46:25 -08001109 if (likely(port_stat & PORT_IRQ_SDB_FIS)) {
1110 do_irq_enable = 0;
1111 WARN_ON_ONCE(atomic_read(&dd->irq_workers_active) != 0);
1112
1113 /* Start at 1: group zero is always local? */
1114 for (i = 0, workers = 0; i < MTIP_MAX_SLOT_GROUPS;
1115 i++) {
1116 twork = &dd->work[i];
1117 twork->completed = readl(port->completed[i]);
1118 if (twork->completed)
1119 workers++;
1120 }
1121
1122 atomic_set(&dd->irq_workers_active, workers);
1123 if (workers) {
1124 for (i = 1; i < MTIP_MAX_SLOT_GROUPS; i++) {
1125 twork = &dd->work[i];
1126 if (twork->completed)
1127 queue_work_on(
1128 twork->cpu_binding,
1129 dd->isr_workq,
1130 &twork->work);
1131 }
1132
1133 if (likely(dd->work[0].completed))
1134 mtip_workq_sdbfx(port, 0,
1135 dd->work[0].completed);
1136
1137 } else {
1138 /*
1139 * Chip quirk: SDB interrupt but nothing
1140 * to complete
1141 */
1142 do_irq_enable = 1;
1143 }
1144 }
Sam Bradshaw88523a62011-08-30 08:34:26 -06001145
1146 if (unlikely(port_stat & PORT_IRQ_ERR)) {
1147 if (unlikely(mtip_check_surprise_removal(dd->pdev))) {
1148 mtip_command_cleanup(dd);
1149 /* don't proceed further */
1150 return IRQ_HANDLED;
1151 }
Asai Thambi S P8a857a82012-04-09 08:35:38 +02001152 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
Asai Thambi S P45038362012-04-09 08:35:38 +02001153 &dd->dd_flag))
1154 return rv;
Sam Bradshaw88523a62011-08-30 08:34:26 -06001155
1156 mtip_process_errors(dd, port_stat & PORT_IRQ_ERR);
1157 }
1158
1159 if (unlikely(port_stat & PORT_IRQ_LEGACY))
1160 mtip_process_legacy(dd, port_stat & PORT_IRQ_LEGACY);
1161 }
1162
1163 /* acknowledge interrupt */
Asai Thambi S P16c906e52012-12-20 07:46:25 -08001164 if (unlikely(do_irq_enable))
1165 writel(hba_stat, dd->mmio + HOST_IRQ_STAT);
Sam Bradshaw88523a62011-08-30 08:34:26 -06001166
1167 return rv;
1168}
1169
1170/*
Sam Bradshaw88523a62011-08-30 08:34:26 -06001171 * HBA interrupt subroutine.
1172 *
1173 * @irq IRQ number.
1174 * @instance Pointer to the driver data structure.
1175 *
1176 * return value
1177 * IRQ_HANDLED A HBA interrupt was pending and handled.
1178 * IRQ_NONE This interrupt was not for the HBA.
1179 */
1180static irqreturn_t mtip_irq_handler(int irq, void *instance)
1181{
1182 struct driver_data *dd = instance;
Asai Thambi S P16c906e52012-12-20 07:46:25 -08001183
1184 return mtip_handle_irq(dd);
Sam Bradshaw88523a62011-08-30 08:34:26 -06001185}
1186
1187static void mtip_issue_non_ncq_command(struct mtip_port *port, int tag)
1188{
1189 atomic_set(&port->commands[tag].active, 1);
1190 writel(1 << MTIP_TAG_BIT(tag),
1191 port->cmd_issue[MTIP_TAG_INDEX(tag)]);
1192}
1193
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02001194static bool mtip_pause_ncq(struct mtip_port *port,
1195 struct host_to_dev_fis *fis)
1196{
1197 struct host_to_dev_fis *reply;
1198 unsigned long task_file_data;
1199
1200 reply = port->rxfis + RX_FIS_D2H_REG;
1201 task_file_data = readl(port->mmio+PORT_TFDATA);
1202
Asai Thambi S P12a166c2012-09-05 22:01:36 +05301203 if (fis->command == ATA_CMD_SEC_ERASE_UNIT)
1204 clear_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
1205
1206 if ((task_file_data & 1))
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02001207 return false;
1208
1209 if (fis->command == ATA_CMD_SEC_ERASE_PREP) {
1210 set_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags);
Asai Thambi S P12a166c2012-09-05 22:01:36 +05301211 set_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02001212 port->ic_pause_timer = jiffies;
1213 return true;
1214 } else if ((fis->command == ATA_CMD_DOWNLOAD_MICRO) &&
1215 (fis->features == 0x03)) {
1216 set_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags);
1217 port->ic_pause_timer = jiffies;
1218 return true;
1219 } else if ((fis->command == ATA_CMD_SEC_ERASE_UNIT) ||
1220 ((fis->command == 0xFC) &&
1221 (fis->features == 0x27 || fis->features == 0x72 ||
1222 fis->features == 0x62 || fis->features == 0x26))) {
1223 /* Com reset after secure erase or lowlevel format */
1224 mtip_restart_port(port);
1225 return false;
1226 }
1227
1228 return false;
1229}
1230
Sam Bradshaw88523a62011-08-30 08:34:26 -06001231/*
1232 * Wait for port to quiesce
1233 *
1234 * @port Pointer to port data structure
1235 * @timeout Max duration to wait (ms)
1236 *
1237 * return value
1238 * 0 Success
1239 * -EBUSY Commands still active
1240 */
1241static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout)
1242{
1243 unsigned long to;
Dan Carpenter3e54a3d2011-11-24 12:59:00 +01001244 unsigned int n;
1245 unsigned int active = 1;
Sam Bradshaw88523a62011-08-30 08:34:26 -06001246
1247 to = jiffies + msecs_to_jiffies(timeout);
1248 do {
Asai Thambi S P8a857a82012-04-09 08:35:38 +02001249 if (test_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags) &&
1250 test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) {
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01001251 msleep(20);
1252 continue; /* svc thd is actively issuing commands */
1253 }
Asai Thambi S P8a857a82012-04-09 08:35:38 +02001254 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
Asai Thambi S P45038362012-04-09 08:35:38 +02001255 return -EFAULT;
Sam Bradshaw88523a62011-08-30 08:34:26 -06001256 /*
1257 * Ignore s_active bit 0 of array element 0.
1258 * This bit will always be set
1259 */
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01001260 active = readl(port->s_active[0]) & 0xFFFFFFFE;
Sam Bradshaw88523a62011-08-30 08:34:26 -06001261 for (n = 1; n < port->dd->slot_groups; n++)
1262 active |= readl(port->s_active[n]);
1263
1264 if (!active)
1265 break;
1266
1267 msleep(20);
1268 } while (time_before(jiffies, to));
1269
1270 return active ? -EBUSY : 0;
1271}
1272
1273/*
1274 * Execute an internal command and wait for the completion.
1275 *
1276 * @port Pointer to the port data structure.
1277 * @fis Pointer to the FIS that describes the command.
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01001278 * @fis_len Length in WORDS of the FIS.
Sam Bradshaw88523a62011-08-30 08:34:26 -06001279 * @buffer DMA accessible for command data.
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01001280 * @buf_len Length, in bytes, of the data buffer.
Sam Bradshaw88523a62011-08-30 08:34:26 -06001281 * @opts Command header options, excluding the FIS length
1282 * and the number of PRD entries.
1283 * @timeout Time in ms to wait for the command to complete.
1284 *
1285 * return value
1286 * 0 Command completed successfully.
1287 * -EFAULT The buffer address is not correctly aligned.
1288 * -EBUSY Internal command or other IO in progress.
1289 * -EAGAIN Time out waiting for command to complete.
1290 */
1291static int mtip_exec_internal_command(struct mtip_port *port,
Asai Thambi S P8182b492012-04-09 08:35:38 +02001292 struct host_to_dev_fis *fis,
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01001293 int fis_len,
Sam Bradshaw88523a62011-08-30 08:34:26 -06001294 dma_addr_t buffer,
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01001295 int buf_len,
Sam Bradshaw88523a62011-08-30 08:34:26 -06001296 u32 opts,
1297 gfp_t atomic,
1298 unsigned long timeout)
1299{
1300 struct mtip_cmd_sg *command_sg;
1301 DECLARE_COMPLETION_ONSTACK(wait);
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02001302 int rv = 0, ready2go = 1;
Sam Bradshaw88523a62011-08-30 08:34:26 -06001303 struct mtip_cmd *int_cmd = &port->commands[MTIP_TAG_INTERNAL];
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02001304 unsigned long to;
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +05301305 struct driver_data *dd = port->dd;
Sam Bradshaw88523a62011-08-30 08:34:26 -06001306
1307 /* Make sure the buffer is 8 byte aligned. This is asic specific. */
1308 if (buffer & 0x00000007) {
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +05301309 dev_err(&dd->pdev->dev, "SG buffer is not 8 byte aligned\n");
Sam Bradshaw88523a62011-08-30 08:34:26 -06001310 return -EFAULT;
1311 }
1312
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02001313 to = jiffies + msecs_to_jiffies(timeout);
1314 do {
1315 ready2go = !test_and_set_bit(MTIP_TAG_INTERNAL,
1316 port->allocated);
1317 if (ready2go)
1318 break;
1319 mdelay(100);
1320 } while (time_before(jiffies, to));
1321 if (!ready2go) {
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +05301322 dev_warn(&dd->pdev->dev,
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02001323 "Internal cmd active. new cmd [%02X]\n", fis->command);
Sam Bradshaw88523a62011-08-30 08:34:26 -06001324 return -EBUSY;
1325 }
Asai Thambi S P8a857a82012-04-09 08:35:38 +02001326 set_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02001327 port->ic_pause_timer = 0;
1328
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +05301329 clear_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags);
1330 clear_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags);
Sam Bradshaw88523a62011-08-30 08:34:26 -06001331
1332 if (atomic == GFP_KERNEL) {
Asai Thambi S P8182b492012-04-09 08:35:38 +02001333 if (fis->command != ATA_CMD_STANDBYNOW1) {
1334 /* wait for io to complete if non atomic */
1335 if (mtip_quiesce_io(port, 5000) < 0) {
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +05301336 dev_warn(&dd->pdev->dev,
Asai Thambi S P8182b492012-04-09 08:35:38 +02001337 "Failed to quiesce IO\n");
1338 release_slot(port, MTIP_TAG_INTERNAL);
Asai Thambi S P8a857a82012-04-09 08:35:38 +02001339 clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
Asai Thambi S P8182b492012-04-09 08:35:38 +02001340 wake_up_interruptible(&port->svc_wait);
1341 return -EBUSY;
1342 }
Sam Bradshaw88523a62011-08-30 08:34:26 -06001343 }
1344
1345 /* Set the completion function and data for the command. */
1346 int_cmd->comp_data = &wait;
1347 int_cmd->comp_func = mtip_completion;
1348
1349 } else {
1350 /* Clear completion - we're going to poll */
1351 int_cmd->comp_data = NULL;
Asai Thambi S P8182b492012-04-09 08:35:38 +02001352 int_cmd->comp_func = mtip_null_completion;
Sam Bradshaw88523a62011-08-30 08:34:26 -06001353 }
1354
1355 /* Copy the command to the command table */
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01001356 memcpy(int_cmd->command, fis, fis_len*4);
Sam Bradshaw88523a62011-08-30 08:34:26 -06001357
1358 /* Populate the SG list */
1359 int_cmd->command_header->opts =
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01001360 __force_bit2int cpu_to_le32(opts | fis_len);
1361 if (buf_len) {
Sam Bradshaw88523a62011-08-30 08:34:26 -06001362 command_sg = int_cmd->command + AHCI_CMD_TBL_HDR_SZ;
1363
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01001364 command_sg->info =
1365 __force_bit2int cpu_to_le32((buf_len-1) & 0x3FFFFF);
1366 command_sg->dba =
1367 __force_bit2int cpu_to_le32(buffer & 0xFFFFFFFF);
1368 command_sg->dba_upper =
1369 __force_bit2int cpu_to_le32((buffer >> 16) >> 16);
Sam Bradshaw88523a62011-08-30 08:34:26 -06001370
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01001371 int_cmd->command_header->opts |=
1372 __force_bit2int cpu_to_le32((1 << 16));
Sam Bradshaw88523a62011-08-30 08:34:26 -06001373 }
1374
1375 /* Populate the command header */
1376 int_cmd->command_header->byte_count = 0;
1377
1378 /* Issue the command to the hardware */
1379 mtip_issue_non_ncq_command(port, MTIP_TAG_INTERNAL);
1380
Sam Bradshaw88523a62011-08-30 08:34:26 -06001381 if (atomic == GFP_KERNEL) {
1382 /* Wait for the command to complete or timeout. */
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +05301383 if (wait_for_completion_interruptible_timeout(
Sam Bradshaw88523a62011-08-30 08:34:26 -06001384 &wait,
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +05301385 msecs_to_jiffies(timeout)) <= 0) {
1386 if (rv == -ERESTARTSYS) { /* interrupted */
1387 dev_err(&dd->pdev->dev,
1388 "Internal command [%02X] was interrupted after %lu ms\n",
1389 fis->command, timeout);
1390 rv = -EINTR;
1391 goto exec_ic_exit;
1392 } else if (rv == 0) /* timeout */
1393 dev_err(&dd->pdev->dev,
1394 "Internal command did not complete [%02X] within timeout of %lu ms\n",
1395 fis->command, timeout);
1396 else
1397 dev_err(&dd->pdev->dev,
1398 "Internal command [%02X] wait returned code [%d] after %lu ms - unhandled\n",
1399 fis->command, rv, timeout);
1400
1401 if (mtip_check_surprise_removal(dd->pdev) ||
Asai Thambi S P8a857a82012-04-09 08:35:38 +02001402 test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +05301403 &dd->dd_flag)) {
1404 dev_err(&dd->pdev->dev,
1405 "Internal command [%02X] wait returned due to SR\n",
1406 fis->command);
Asai Thambi S P45038362012-04-09 08:35:38 +02001407 rv = -ENXIO;
1408 goto exec_ic_exit;
1409 }
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +05301410 mtip_device_reset(dd); /* recover from timeout issue */
Sam Bradshaw88523a62011-08-30 08:34:26 -06001411 rv = -EAGAIN;
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +05301412 goto exec_ic_exit;
Sam Bradshaw88523a62011-08-30 08:34:26 -06001413 }
Sam Bradshaw88523a62011-08-30 08:34:26 -06001414 } else {
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +05301415 u32 hba_stat, port_stat;
1416
Sam Bradshaw88523a62011-08-30 08:34:26 -06001417 /* Spin for <timeout> checking if command still outstanding */
1418 timeout = jiffies + msecs_to_jiffies(timeout);
Asai Thambi S P8182b492012-04-09 08:35:38 +02001419 while ((readl(port->cmd_issue[MTIP_TAG_INTERNAL])
1420 & (1 << MTIP_TAG_INTERNAL))
1421 && time_before(jiffies, timeout)) {
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +05301422 if (mtip_check_surprise_removal(dd->pdev)) {
Asai Thambi S P8182b492012-04-09 08:35:38 +02001423 rv = -ENXIO;
1424 goto exec_ic_exit;
1425 }
1426 if ((fis->command != ATA_CMD_STANDBYNOW1) &&
Asai Thambi S P8a857a82012-04-09 08:35:38 +02001427 test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +05301428 &dd->dd_flag)) {
Asai Thambi S P45038362012-04-09 08:35:38 +02001429 rv = -ENXIO;
1430 goto exec_ic_exit;
1431 }
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +05301432 port_stat = readl(port->mmio + PORT_IRQ_STAT);
1433 if (!port_stat)
1434 continue;
1435
1436 if (port_stat & PORT_IRQ_ERR) {
1437 dev_err(&dd->pdev->dev,
1438 "Internal command [%02X] failed\n",
1439 fis->command);
1440 mtip_device_reset(dd);
1441 rv = -EIO;
1442 goto exec_ic_exit;
1443 } else {
1444 writel(port_stat, port->mmio + PORT_IRQ_STAT);
1445 hba_stat = readl(dd->mmio + HOST_IRQ_STAT);
1446 if (hba_stat)
1447 writel(hba_stat,
1448 dd->mmio + HOST_IRQ_STAT);
Asai Thambi S P45038362012-04-09 08:35:38 +02001449 }
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +05301450 break;
Sam Bradshaw88523a62011-08-30 08:34:26 -06001451 }
1452 }
Asai Thambi S Pd02e1f02012-05-29 18:42:27 -07001453
Asai Thambi S Pd02e1f02012-05-29 18:42:27 -07001454 if (readl(port->cmd_issue[MTIP_TAG_INTERNAL])
1455 & (1 << MTIP_TAG_INTERNAL)) {
1456 rv = -ENXIO;
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +05301457 if (!test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) {
1458 mtip_device_reset(dd);
Asai Thambi S Pd02e1f02012-05-29 18:42:27 -07001459 rv = -EAGAIN;
1460 }
1461 }
Asai Thambi S P45038362012-04-09 08:35:38 +02001462exec_ic_exit:
Sam Bradshaw88523a62011-08-30 08:34:26 -06001463 /* Clear the allocated and active bits for the internal command. */
1464 atomic_set(&int_cmd->active, 0);
1465 release_slot(port, MTIP_TAG_INTERNAL);
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02001466 if (rv >= 0 && mtip_pause_ncq(port, fis)) {
1467 /* NCQ paused */
1468 return rv;
1469 }
Asai Thambi S P8a857a82012-04-09 08:35:38 +02001470 clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags);
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01001471 wake_up_interruptible(&port->svc_wait);
Sam Bradshaw88523a62011-08-30 08:34:26 -06001472
1473 return rv;
1474}
1475
1476/*
1477 * Byte-swap ATA ID strings.
1478 *
1479 * ATA identify data contains strings in byte-swapped 16-bit words.
1480 * They must be swapped (on all architectures) to be usable as C strings.
1481 * This function swaps bytes in-place.
1482 *
1483 * @buf The buffer location of the string
1484 * @len The number of bytes to swap
1485 *
1486 * return value
1487 * None
1488 */
1489static inline void ata_swap_string(u16 *buf, unsigned int len)
1490{
1491 int i;
1492 for (i = 0; i < (len/2); i++)
1493 be16_to_cpus(&buf[i]);
1494}
1495
1496/*
1497 * Request the device identity information.
1498 *
1499 * If a user space buffer is not specified, i.e. is NULL, the
1500 * identify information is still read from the drive and placed
1501 * into the identify data buffer (@e port->identify) in the
1502 * port data structure.
1503 * When the identify buffer contains valid identify information @e
1504 * port->identify_valid is non-zero.
1505 *
1506 * @port Pointer to the port structure.
1507 * @user_buffer A user space buffer where the identify data should be
1508 * copied.
1509 *
1510 * return value
1511 * 0 Command completed successfully.
1512 * -EFAULT An error occurred while coping data to the user buffer.
1513 * -1 Command failed.
1514 */
1515static int mtip_get_identify(struct mtip_port *port, void __user *user_buffer)
1516{
1517 int rv = 0;
1518 struct host_to_dev_fis fis;
1519
Asai Thambi S P8a857a82012-04-09 08:35:38 +02001520 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag))
Asai Thambi S P45038362012-04-09 08:35:38 +02001521 return -EFAULT;
1522
Sam Bradshaw88523a62011-08-30 08:34:26 -06001523 /* Build the FIS. */
1524 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1525 fis.type = 0x27;
1526 fis.opts = 1 << 7;
1527 fis.command = ATA_CMD_ID_ATA;
1528
1529 /* Set the identify information as invalid. */
1530 port->identify_valid = 0;
1531
1532 /* Clear the identify information. */
1533 memset(port->identify, 0, sizeof(u16) * ATA_ID_WORDS);
1534
1535 /* Execute the command. */
1536 if (mtip_exec_internal_command(port,
1537 &fis,
1538 5,
1539 port->identify_dma,
1540 sizeof(u16) * ATA_ID_WORDS,
1541 0,
1542 GFP_KERNEL,
1543 MTIP_INTERNAL_COMMAND_TIMEOUT_MS)
1544 < 0) {
1545 rv = -1;
1546 goto out;
1547 }
1548
1549 /*
1550 * Perform any necessary byte-swapping. Yes, the kernel does in fact
1551 * perform field-sensitive swapping on the string fields.
1552 * See the kernel use of ata_id_string() for proof of this.
1553 */
1554#ifdef __LITTLE_ENDIAN
1555 ata_swap_string(port->identify + 27, 40); /* model string*/
1556 ata_swap_string(port->identify + 23, 8); /* firmware string*/
1557 ata_swap_string(port->identify + 10, 20); /* serial# string*/
1558#else
1559 {
1560 int i;
1561 for (i = 0; i < ATA_ID_WORDS; i++)
1562 port->identify[i] = le16_to_cpu(port->identify[i]);
1563 }
1564#endif
1565
Asai Thambi S P68466cb2013-04-12 23:58:02 +05301566#ifdef MTIP_TRIM /* Disabling TRIM support temporarily */
Asai Thambi S P15283462013-01-11 14:41:34 +01001567 /* Demux ID.DRAT & ID.RZAT to determine trim support */
1568 if (port->identify[69] & (1 << 14) && port->identify[69] & (1 << 5))
1569 port->dd->trim_supp = true;
1570 else
Asai Thambi S P68466cb2013-04-12 23:58:02 +05301571#endif
Asai Thambi S P15283462013-01-11 14:41:34 +01001572 port->dd->trim_supp = false;
1573
Sam Bradshaw88523a62011-08-30 08:34:26 -06001574 /* Set the identify buffer as valid. */
1575 port->identify_valid = 1;
1576
1577 if (user_buffer) {
1578 if (copy_to_user(
1579 user_buffer,
1580 port->identify,
1581 ATA_ID_WORDS * sizeof(u16))) {
1582 rv = -EFAULT;
1583 goto out;
1584 }
1585 }
1586
1587out:
Sam Bradshaw88523a62011-08-30 08:34:26 -06001588 return rv;
1589}
1590
1591/*
1592 * Issue a standby immediate command to the device.
1593 *
1594 * @port Pointer to the port structure.
1595 *
1596 * return value
1597 * 0 Command was executed successfully.
1598 * -1 An error occurred while executing the command.
1599 */
1600static int mtip_standby_immediate(struct mtip_port *port)
1601{
1602 int rv;
1603 struct host_to_dev_fis fis;
Asai Thambi S Pf6587212012-04-09 08:35:38 +02001604 unsigned long start;
Sam Bradshaw88523a62011-08-30 08:34:26 -06001605
Sam Bradshaw88523a62011-08-30 08:34:26 -06001606 /* Build the FIS. */
1607 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1608 fis.type = 0x27;
1609 fis.opts = 1 << 7;
1610 fis.command = ATA_CMD_STANDBYNOW1;
1611
Asai Thambi S Pf6587212012-04-09 08:35:38 +02001612 start = jiffies;
Sam Bradshaw88523a62011-08-30 08:34:26 -06001613 rv = mtip_exec_internal_command(port,
1614 &fis,
1615 5,
1616 0,
1617 0,
1618 0,
Asai Thambi S Pf6587212012-04-09 08:35:38 +02001619 GFP_ATOMIC,
Sam Bradshaw88523a62011-08-30 08:34:26 -06001620 15000);
Asai Thambi S Pf6587212012-04-09 08:35:38 +02001621 dbg_printk(MTIP_DRV_NAME "Time taken to complete standby cmd: %d ms\n",
1622 jiffies_to_msecs(jiffies - start));
1623 if (rv)
1624 dev_warn(&port->dd->pdev->dev,
1625 "STANDBY IMMEDIATE command failed.\n");
1626
1627 return rv;
1628}
1629
1630/*
1631 * Issue a READ LOG EXT command to the device.
1632 *
1633 * @port pointer to the port structure.
1634 * @page page number to fetch
1635 * @buffer pointer to buffer
1636 * @buffer_dma dma address corresponding to @buffer
1637 * @sectors page length to fetch, in sectors
1638 *
1639 * return value
1640 * @rv return value from mtip_exec_internal_command()
1641 */
1642static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer,
1643 dma_addr_t buffer_dma, unsigned int sectors)
1644{
1645 struct host_to_dev_fis fis;
1646
1647 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1648 fis.type = 0x27;
1649 fis.opts = 1 << 7;
1650 fis.command = ATA_CMD_READ_LOG_EXT;
1651 fis.sect_count = sectors & 0xFF;
1652 fis.sect_cnt_ex = (sectors >> 8) & 0xFF;
1653 fis.lba_low = page;
1654 fis.lba_mid = 0;
1655 fis.device = ATA_DEVICE_OBS;
1656
1657 memset(buffer, 0, sectors * ATA_SECT_SIZE);
1658
1659 return mtip_exec_internal_command(port,
1660 &fis,
1661 5,
1662 buffer_dma,
1663 sectors * ATA_SECT_SIZE,
1664 0,
1665 GFP_ATOMIC,
1666 MTIP_INTERNAL_COMMAND_TIMEOUT_MS);
1667}
1668
1669/*
1670 * Issue a SMART READ DATA command to the device.
1671 *
1672 * @port pointer to the port structure.
1673 * @buffer pointer to buffer
1674 * @buffer_dma dma address corresponding to @buffer
1675 *
1676 * return value
1677 * @rv return value from mtip_exec_internal_command()
1678 */
1679static int mtip_get_smart_data(struct mtip_port *port, u8 *buffer,
1680 dma_addr_t buffer_dma)
1681{
1682 struct host_to_dev_fis fis;
1683
1684 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1685 fis.type = 0x27;
1686 fis.opts = 1 << 7;
1687 fis.command = ATA_CMD_SMART;
1688 fis.features = 0xD0;
1689 fis.sect_count = 1;
1690 fis.lba_mid = 0x4F;
1691 fis.lba_hi = 0xC2;
1692 fis.device = ATA_DEVICE_OBS;
1693
1694 return mtip_exec_internal_command(port,
1695 &fis,
1696 5,
1697 buffer_dma,
1698 ATA_SECT_SIZE,
1699 0,
1700 GFP_ATOMIC,
1701 15000);
1702}
1703
1704/*
1705 * Get the value of a smart attribute
1706 *
1707 * @port pointer to the port structure
1708 * @id attribute number
1709 * @attrib pointer to return attrib information corresponding to @id
1710 *
1711 * return value
1712 * -EINVAL NULL buffer passed or unsupported attribute @id.
1713 * -EPERM Identify data not valid, SMART not supported or not enabled
1714 */
1715static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id,
1716 struct smart_attr *attrib)
1717{
1718 int rv, i;
1719 struct smart_attr *pattr;
1720
1721 if (!attrib)
1722 return -EINVAL;
1723
1724 if (!port->identify_valid) {
1725 dev_warn(&port->dd->pdev->dev, "IDENTIFY DATA not valid\n");
1726 return -EPERM;
1727 }
1728 if (!(port->identify[82] & 0x1)) {
1729 dev_warn(&port->dd->pdev->dev, "SMART not supported\n");
1730 return -EPERM;
1731 }
1732 if (!(port->identify[85] & 0x1)) {
1733 dev_warn(&port->dd->pdev->dev, "SMART not enabled\n");
1734 return -EPERM;
1735 }
1736
1737 memset(port->smart_buf, 0, ATA_SECT_SIZE);
1738 rv = mtip_get_smart_data(port, port->smart_buf, port->smart_buf_dma);
1739 if (rv) {
1740 dev_warn(&port->dd->pdev->dev, "Failed to ge SMART data\n");
1741 return rv;
1742 }
1743
1744 pattr = (struct smart_attr *)(port->smart_buf + 2);
1745 for (i = 0; i < 29; i++, pattr++)
1746 if (pattr->attr_id == id) {
1747 memcpy(attrib, pattr, sizeof(struct smart_attr));
1748 break;
1749 }
1750
1751 if (i == 29) {
1752 dev_warn(&port->dd->pdev->dev,
1753 "Query for invalid SMART attribute ID\n");
1754 rv = -EINVAL;
1755 }
Sam Bradshaw88523a62011-08-30 08:34:26 -06001756
Sam Bradshaw88523a62011-08-30 08:34:26 -06001757 return rv;
1758}
1759
1760/*
Asai Thambi S P15283462013-01-11 14:41:34 +01001761 * Trim unused sectors
1762 *
1763 * @dd pointer to driver_data structure
1764 * @lba starting lba
1765 * @len # of 512b sectors to trim
1766 *
1767 * return value
1768 * -ENOMEM Out of dma memory
1769 * -EINVAL Invalid parameters passed in, trim not supported
1770 * -EIO Error submitting trim request to hw
1771 */
Asai Thambi S Pd0d096b2013-04-03 19:53:07 +05301772static int mtip_send_trim(struct driver_data *dd, unsigned int lba,
1773 unsigned int len)
Asai Thambi S P15283462013-01-11 14:41:34 +01001774{
1775 int i, rv = 0;
1776 u64 tlba, tlen, sect_left;
1777 struct mtip_trim_entry *buf;
1778 dma_addr_t dma_addr;
1779 struct host_to_dev_fis fis;
1780
1781 if (!len || dd->trim_supp == false)
1782 return -EINVAL;
1783
1784 /* Trim request too big */
1785 WARN_ON(len > (MTIP_MAX_TRIM_ENTRY_LEN * MTIP_MAX_TRIM_ENTRIES));
1786
1787 /* Trim request not aligned on 4k boundary */
1788 WARN_ON(len % 8 != 0);
1789
1790 /* Warn if vu_trim structure is too big */
1791 WARN_ON(sizeof(struct mtip_trim) > ATA_SECT_SIZE);
1792
1793 /* Allocate a DMA buffer for the trim structure */
1794 buf = dmam_alloc_coherent(&dd->pdev->dev, ATA_SECT_SIZE, &dma_addr,
1795 GFP_KERNEL);
1796 if (!buf)
1797 return -ENOMEM;
1798 memset(buf, 0, ATA_SECT_SIZE);
1799
1800 for (i = 0, sect_left = len, tlba = lba;
1801 i < MTIP_MAX_TRIM_ENTRIES && sect_left;
1802 i++) {
1803 tlen = (sect_left >= MTIP_MAX_TRIM_ENTRY_LEN ?
1804 MTIP_MAX_TRIM_ENTRY_LEN :
1805 sect_left);
1806 buf[i].lba = __force_bit2int cpu_to_le32(tlba);
1807 buf[i].range = __force_bit2int cpu_to_le16(tlen);
1808 tlba += tlen;
1809 sect_left -= tlen;
1810 }
1811 WARN_ON(sect_left != 0);
1812
1813 /* Build the fis */
1814 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1815 fis.type = 0x27;
1816 fis.opts = 1 << 7;
1817 fis.command = 0xfb;
1818 fis.features = 0x60;
1819 fis.sect_count = 1;
1820 fis.device = ATA_DEVICE_OBS;
1821
1822 if (mtip_exec_internal_command(dd->port,
1823 &fis,
1824 5,
1825 dma_addr,
1826 ATA_SECT_SIZE,
1827 0,
1828 GFP_KERNEL,
1829 MTIP_TRIM_TIMEOUT_MS) < 0)
1830 rv = -EIO;
1831
1832 dmam_free_coherent(&dd->pdev->dev, ATA_SECT_SIZE, buf, dma_addr);
1833 return rv;
1834}
1835
1836/*
Sam Bradshaw88523a62011-08-30 08:34:26 -06001837 * Get the drive capacity.
1838 *
1839 * @dd Pointer to the device data structure.
1840 * @sectors Pointer to the variable that will receive the sector count.
1841 *
1842 * return value
1843 * 1 Capacity was returned successfully.
1844 * 0 The identify information is invalid.
1845 */
Jens Axboe63166682011-09-27 21:27:43 -06001846static bool mtip_hw_get_capacity(struct driver_data *dd, sector_t *sectors)
Sam Bradshaw88523a62011-08-30 08:34:26 -06001847{
1848 struct mtip_port *port = dd->port;
1849 u64 total, raw0, raw1, raw2, raw3;
1850 raw0 = port->identify[100];
1851 raw1 = port->identify[101];
1852 raw2 = port->identify[102];
1853 raw3 = port->identify[103];
1854 total = raw0 | raw1<<16 | raw2<<32 | raw3<<48;
1855 *sectors = total;
1856 return (bool) !!port->identify_valid;
1857}
1858
1859/*
Sam Bradshaw88523a62011-08-30 08:34:26 -06001860 * Display the identify command data.
1861 *
1862 * @port Pointer to the port data structure.
1863 *
1864 * return value
1865 * None
1866 */
1867static void mtip_dump_identify(struct mtip_port *port)
1868{
1869 sector_t sectors;
1870 unsigned short revid;
1871 char cbuf[42];
1872
1873 if (!port->identify_valid)
1874 return;
1875
1876 strlcpy(cbuf, (char *)(port->identify+10), 21);
1877 dev_info(&port->dd->pdev->dev,
1878 "Serial No.: %s\n", cbuf);
1879
1880 strlcpy(cbuf, (char *)(port->identify+23), 9);
1881 dev_info(&port->dd->pdev->dev,
1882 "Firmware Ver.: %s\n", cbuf);
1883
1884 strlcpy(cbuf, (char *)(port->identify+27), 41);
1885 dev_info(&port->dd->pdev->dev, "Model: %s\n", cbuf);
1886
1887 if (mtip_hw_get_capacity(port->dd, &sectors))
1888 dev_info(&port->dd->pdev->dev,
1889 "Capacity: %llu sectors (%llu MB)\n",
1890 (u64)sectors,
1891 ((u64)sectors) * ATA_SECT_SIZE >> 20);
1892
1893 pci_read_config_word(port->dd->pdev, PCI_REVISION_ID, &revid);
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01001894 switch (revid & 0xFF) {
Sam Bradshaw88523a62011-08-30 08:34:26 -06001895 case 0x1:
1896 strlcpy(cbuf, "A0", 3);
1897 break;
1898 case 0x3:
1899 strlcpy(cbuf, "A2", 3);
1900 break;
1901 default:
1902 strlcpy(cbuf, "?", 2);
1903 break;
1904 }
1905 dev_info(&port->dd->pdev->dev,
1906 "Card Type: %s\n", cbuf);
1907}
1908
1909/*
1910 * Map the commands scatter list into the command table.
1911 *
1912 * @command Pointer to the command.
1913 * @nents Number of scatter list entries.
1914 *
1915 * return value
1916 * None
1917 */
1918static inline void fill_command_sg(struct driver_data *dd,
1919 struct mtip_cmd *command,
1920 int nents)
1921{
1922 int n;
1923 unsigned int dma_len;
1924 struct mtip_cmd_sg *command_sg;
1925 struct scatterlist *sg = command->sg;
1926
1927 command_sg = command->command + AHCI_CMD_TBL_HDR_SZ;
1928
1929 for (n = 0; n < nents; n++) {
1930 dma_len = sg_dma_len(sg);
1931 if (dma_len > 0x400000)
1932 dev_err(&dd->pdev->dev,
1933 "DMA segment length truncated\n");
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01001934 command_sg->info = __force_bit2int
1935 cpu_to_le32((dma_len-1) & 0x3FFFFF);
1936 command_sg->dba = __force_bit2int
1937 cpu_to_le32(sg_dma_address(sg));
1938 command_sg->dba_upper = __force_bit2int
1939 cpu_to_le32((sg_dma_address(sg) >> 16) >> 16);
Sam Bradshaw88523a62011-08-30 08:34:26 -06001940 command_sg++;
1941 sg++;
1942 }
1943}
1944
1945/*
1946 * @brief Execute a drive command.
1947 *
1948 * return value 0 The command completed successfully.
1949 * return value -1 An error occurred while executing the command.
1950 */
Jens Axboe63166682011-09-27 21:27:43 -06001951static int exec_drive_task(struct mtip_port *port, u8 *command)
Sam Bradshaw88523a62011-08-30 08:34:26 -06001952{
1953 struct host_to_dev_fis fis;
1954 struct host_to_dev_fis *reply = (port->rxfis + RX_FIS_D2H_REG);
1955
Sam Bradshaw88523a62011-08-30 08:34:26 -06001956 /* Build the FIS. */
1957 memset(&fis, 0, sizeof(struct host_to_dev_fis));
1958 fis.type = 0x27;
1959 fis.opts = 1 << 7;
1960 fis.command = command[0];
1961 fis.features = command[1];
1962 fis.sect_count = command[2];
1963 fis.sector = command[3];
1964 fis.cyl_low = command[4];
1965 fis.cyl_hi = command[5];
1966 fis.device = command[6] & ~0x10; /* Clear the dev bit*/
1967
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02001968 dbg_printk(MTIP_DRV_NAME " %s: User Command: cmd %x, feat %x, nsect %x, sect %x, lcyl %x, hcyl %x, sel %x\n",
Sam Bradshaw88523a62011-08-30 08:34:26 -06001969 __func__,
1970 command[0],
1971 command[1],
1972 command[2],
1973 command[3],
1974 command[4],
1975 command[5],
1976 command[6]);
1977
1978 /* Execute the command. */
1979 if (mtip_exec_internal_command(port,
1980 &fis,
1981 5,
1982 0,
1983 0,
1984 0,
1985 GFP_KERNEL,
1986 MTIP_IOCTL_COMMAND_TIMEOUT_MS) < 0) {
Sam Bradshaw88523a62011-08-30 08:34:26 -06001987 return -1;
1988 }
1989
1990 command[0] = reply->command; /* Status*/
1991 command[1] = reply->features; /* Error*/
1992 command[4] = reply->cyl_low;
1993 command[5] = reply->cyl_hi;
1994
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02001995 dbg_printk(MTIP_DRV_NAME " %s: Completion Status: stat %x, err %x , cyl_lo %x cyl_hi %x\n",
Sam Bradshaw88523a62011-08-30 08:34:26 -06001996 __func__,
1997 command[0],
1998 command[1],
1999 command[4],
2000 command[5]);
2001
Sam Bradshaw88523a62011-08-30 08:34:26 -06002002 return 0;
2003}
2004
2005/*
2006 * @brief Execute a drive command.
2007 *
2008 * @param port Pointer to the port data structure.
2009 * @param command Pointer to the user specified command parameters.
2010 * @param user_buffer Pointer to the user space buffer where read sector
2011 * data should be copied.
2012 *
2013 * return value 0 The command completed successfully.
2014 * return value -EFAULT An error occurred while copying the completion
2015 * data to the user space buffer.
2016 * return value -1 An error occurred while executing the command.
2017 */
Jens Axboe63166682011-09-27 21:27:43 -06002018static int exec_drive_command(struct mtip_port *port, u8 *command,
2019 void __user *user_buffer)
Sam Bradshaw88523a62011-08-30 08:34:26 -06002020{
2021 struct host_to_dev_fis fis;
Asai Thambi S Pe602878f2012-05-29 18:43:31 -07002022 struct host_to_dev_fis *reply;
2023 u8 *buf = NULL;
2024 dma_addr_t dma_addr = 0;
2025 int rv = 0, xfer_sz = command[3];
2026
2027 if (xfer_sz) {
David Milburn97651ea2012-09-12 14:06:12 -05002028 if (!user_buffer)
Asai Thambi S Pe602878f2012-05-29 18:43:31 -07002029 return -EFAULT;
2030
2031 buf = dmam_alloc_coherent(&port->dd->pdev->dev,
2032 ATA_SECT_SIZE * xfer_sz,
2033 &dma_addr,
2034 GFP_KERNEL);
2035 if (!buf) {
2036 dev_err(&port->dd->pdev->dev,
2037 "Memory allocation failed (%d bytes)\n",
2038 ATA_SECT_SIZE * xfer_sz);
2039 return -ENOMEM;
2040 }
2041 memset(buf, 0, ATA_SECT_SIZE * xfer_sz);
2042 }
Sam Bradshaw88523a62011-08-30 08:34:26 -06002043
Sam Bradshaw88523a62011-08-30 08:34:26 -06002044 /* Build the FIS. */
2045 memset(&fis, 0, sizeof(struct host_to_dev_fis));
Asai Thambi S Pe602878f2012-05-29 18:43:31 -07002046 fis.type = 0x27;
2047 fis.opts = 1 << 7;
2048 fis.command = command[0];
Sam Bradshaw88523a62011-08-30 08:34:26 -06002049 fis.features = command[2];
2050 fis.sect_count = command[3];
2051 if (fis.command == ATA_CMD_SMART) {
2052 fis.sector = command[1];
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01002053 fis.cyl_low = 0x4F;
2054 fis.cyl_hi = 0xC2;
Sam Bradshaw88523a62011-08-30 08:34:26 -06002055 }
2056
Asai Thambi S Pe602878f2012-05-29 18:43:31 -07002057 if (xfer_sz)
2058 reply = (port->rxfis + RX_FIS_PIO_SETUP);
2059 else
2060 reply = (port->rxfis + RX_FIS_D2H_REG);
2061
Sam Bradshaw88523a62011-08-30 08:34:26 -06002062 dbg_printk(MTIP_DRV_NAME
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02002063 " %s: User Command: cmd %x, sect %x, "
Sam Bradshaw88523a62011-08-30 08:34:26 -06002064 "feat %x, sectcnt %x\n",
2065 __func__,
2066 command[0],
2067 command[1],
2068 command[2],
2069 command[3]);
2070
Sam Bradshaw88523a62011-08-30 08:34:26 -06002071 /* Execute the command. */
2072 if (mtip_exec_internal_command(port,
2073 &fis,
2074 5,
Asai Thambi S Pe602878f2012-05-29 18:43:31 -07002075 (xfer_sz ? dma_addr : 0),
2076 (xfer_sz ? ATA_SECT_SIZE * xfer_sz : 0),
Sam Bradshaw88523a62011-08-30 08:34:26 -06002077 0,
2078 GFP_KERNEL,
2079 MTIP_IOCTL_COMMAND_TIMEOUT_MS)
2080 < 0) {
Asai Thambi S Pe602878f2012-05-29 18:43:31 -07002081 rv = -EFAULT;
2082 goto exit_drive_command;
Sam Bradshaw88523a62011-08-30 08:34:26 -06002083 }
2084
2085 /* Collect the completion status. */
2086 command[0] = reply->command; /* Status*/
2087 command[1] = reply->features; /* Error*/
Asai Thambi S Pe602878f2012-05-29 18:43:31 -07002088 command[2] = reply->sect_count;
Sam Bradshaw88523a62011-08-30 08:34:26 -06002089
2090 dbg_printk(MTIP_DRV_NAME
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02002091 " %s: Completion Status: stat %x, "
Asai Thambi S Pe602878f2012-05-29 18:43:31 -07002092 "err %x, nsect %x\n",
Sam Bradshaw88523a62011-08-30 08:34:26 -06002093 __func__,
2094 command[0],
2095 command[1],
2096 command[2]);
2097
Asai Thambi S Pe602878f2012-05-29 18:43:31 -07002098 if (xfer_sz) {
Sam Bradshaw88523a62011-08-30 08:34:26 -06002099 if (copy_to_user(user_buffer,
Asai Thambi S Pe602878f2012-05-29 18:43:31 -07002100 buf,
Sam Bradshaw88523a62011-08-30 08:34:26 -06002101 ATA_SECT_SIZE * command[3])) {
Asai Thambi S Pe602878f2012-05-29 18:43:31 -07002102 rv = -EFAULT;
2103 goto exit_drive_command;
Sam Bradshaw88523a62011-08-30 08:34:26 -06002104 }
2105 }
Asai Thambi S Pe602878f2012-05-29 18:43:31 -07002106exit_drive_command:
2107 if (buf)
2108 dmam_free_coherent(&port->dd->pdev->dev,
2109 ATA_SECT_SIZE * xfer_sz, buf, dma_addr);
2110 return rv;
Sam Bradshaw88523a62011-08-30 08:34:26 -06002111}
2112
2113/*
2114 * Indicates whether a command has a single sector payload.
2115 *
2116 * @command passed to the device to perform the certain event.
2117 * @features passed to the device to perform the certain event.
2118 *
2119 * return value
2120 * 1 command is one that always has a single sector payload,
2121 * regardless of the value in the Sector Count field.
2122 * 0 otherwise
2123 *
2124 */
2125static unsigned int implicit_sector(unsigned char command,
2126 unsigned char features)
2127{
2128 unsigned int rv = 0;
2129
2130 /* list of commands that have an implicit sector count of 1 */
2131 switch (command) {
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01002132 case ATA_CMD_SEC_SET_PASS:
2133 case ATA_CMD_SEC_UNLOCK:
2134 case ATA_CMD_SEC_ERASE_PREP:
2135 case ATA_CMD_SEC_ERASE_UNIT:
2136 case ATA_CMD_SEC_FREEZE_LOCK:
2137 case ATA_CMD_SEC_DISABLE_PASS:
2138 case ATA_CMD_PMP_READ:
2139 case ATA_CMD_PMP_WRITE:
Sam Bradshaw88523a62011-08-30 08:34:26 -06002140 rv = 1;
2141 break;
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01002142 case ATA_CMD_SET_MAX:
2143 if (features == ATA_SET_MAX_UNLOCK)
Sam Bradshaw88523a62011-08-30 08:34:26 -06002144 rv = 1;
2145 break;
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01002146 case ATA_CMD_SMART:
2147 if ((features == ATA_SMART_READ_VALUES) ||
2148 (features == ATA_SMART_READ_THRESHOLDS))
Sam Bradshaw88523a62011-08-30 08:34:26 -06002149 rv = 1;
2150 break;
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01002151 case ATA_CMD_CONF_OVERLAY:
2152 if ((features == ATA_DCO_IDENTIFY) ||
2153 (features == ATA_DCO_SET))
Sam Bradshaw88523a62011-08-30 08:34:26 -06002154 rv = 1;
2155 break;
2156 }
2157 return rv;
2158}
Selvan Mani4453bc82012-09-27 14:36:43 +02002159static void mtip_set_timeout(struct driver_data *dd,
2160 struct host_to_dev_fis *fis,
2161 unsigned int *timeout, u8 erasemode)
Asai Thambi S P2df7aa92012-05-29 18:41:23 -07002162{
2163 switch (fis->command) {
2164 case ATA_CMD_DOWNLOAD_MICRO:
2165 *timeout = 120000; /* 2 minutes */
2166 break;
2167 case ATA_CMD_SEC_ERASE_UNIT:
2168 case 0xFC:
Selvan Mani4453bc82012-09-27 14:36:43 +02002169 if (erasemode)
2170 *timeout = ((*(dd->port->identify + 90) * 2) * 60000);
2171 else
2172 *timeout = ((*(dd->port->identify + 89) * 2) * 60000);
Asai Thambi S P2df7aa92012-05-29 18:41:23 -07002173 break;
2174 case ATA_CMD_STANDBYNOW1:
Asai Thambi S Pd7c8b942012-09-05 22:02:16 +05302175 *timeout = 120000; /* 2 minutes */
Asai Thambi S P2df7aa92012-05-29 18:41:23 -07002176 break;
2177 case 0xF7:
2178 case 0xFA:
2179 *timeout = 60000; /* 60 seconds */
2180 break;
2181 case ATA_CMD_SMART:
2182 *timeout = 15000; /* 15 seconds */
2183 break;
2184 default:
2185 *timeout = MTIP_IOCTL_COMMAND_TIMEOUT_MS;
2186 break;
2187 }
2188}
2189
Sam Bradshaw88523a62011-08-30 08:34:26 -06002190/*
2191 * Executes a taskfile
2192 * See ide_taskfile_ioctl() for derivation
2193 */
2194static int exec_drive_taskfile(struct driver_data *dd,
Jens Axboeef0f1582011-09-27 21:19:53 -06002195 void __user *buf,
2196 ide_task_request_t *req_task,
2197 int outtotal)
Sam Bradshaw88523a62011-08-30 08:34:26 -06002198{
2199 struct host_to_dev_fis fis;
2200 struct host_to_dev_fis *reply;
Sam Bradshaw88523a62011-08-30 08:34:26 -06002201 u8 *outbuf = NULL;
2202 u8 *inbuf = NULL;
Jens Axboe16d02c02011-09-27 15:50:01 -06002203 dma_addr_t outbuf_dma = 0;
2204 dma_addr_t inbuf_dma = 0;
2205 dma_addr_t dma_buffer = 0;
Sam Bradshaw88523a62011-08-30 08:34:26 -06002206 int err = 0;
Sam Bradshaw88523a62011-08-30 08:34:26 -06002207 unsigned int taskin = 0;
2208 unsigned int taskout = 0;
2209 u8 nsect = 0;
Asai Thambi S P2df7aa92012-05-29 18:41:23 -07002210 unsigned int timeout;
Sam Bradshaw88523a62011-08-30 08:34:26 -06002211 unsigned int force_single_sector;
2212 unsigned int transfer_size;
2213 unsigned long task_file_data;
Jens Axboeef0f1582011-09-27 21:19:53 -06002214 int intotal = outtotal + req_task->out_size;
Selvan Mani4453bc82012-09-27 14:36:43 +02002215 int erasemode = 0;
Sam Bradshaw88523a62011-08-30 08:34:26 -06002216
2217 taskout = req_task->out_size;
2218 taskin = req_task->in_size;
2219 /* 130560 = 512 * 0xFF*/
2220 if (taskin > 130560 || taskout > 130560) {
2221 err = -EINVAL;
2222 goto abort;
2223 }
2224
2225 if (taskout) {
2226 outbuf = kzalloc(taskout, GFP_KERNEL);
2227 if (outbuf == NULL) {
2228 err = -ENOMEM;
2229 goto abort;
2230 }
2231 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
2232 err = -EFAULT;
2233 goto abort;
2234 }
2235 outbuf_dma = pci_map_single(dd->pdev,
2236 outbuf,
2237 taskout,
2238 DMA_TO_DEVICE);
Jens Axboe16d02c02011-09-27 15:50:01 -06002239 if (outbuf_dma == 0) {
Sam Bradshaw88523a62011-08-30 08:34:26 -06002240 err = -ENOMEM;
2241 goto abort;
2242 }
2243 dma_buffer = outbuf_dma;
2244 }
2245
2246 if (taskin) {
2247 inbuf = kzalloc(taskin, GFP_KERNEL);
2248 if (inbuf == NULL) {
2249 err = -ENOMEM;
2250 goto abort;
2251 }
2252
2253 if (copy_from_user(inbuf, buf + intotal, taskin)) {
2254 err = -EFAULT;
2255 goto abort;
2256 }
2257 inbuf_dma = pci_map_single(dd->pdev,
2258 inbuf,
2259 taskin, DMA_FROM_DEVICE);
Jens Axboe16d02c02011-09-27 15:50:01 -06002260 if (inbuf_dma == 0) {
Sam Bradshaw88523a62011-08-30 08:34:26 -06002261 err = -ENOMEM;
2262 goto abort;
2263 }
2264 dma_buffer = inbuf_dma;
2265 }
2266
2267 /* only supports PIO and non-data commands from this ioctl. */
2268 switch (req_task->data_phase) {
2269 case TASKFILE_OUT:
2270 nsect = taskout / ATA_SECT_SIZE;
2271 reply = (dd->port->rxfis + RX_FIS_PIO_SETUP);
2272 break;
2273 case TASKFILE_IN:
2274 reply = (dd->port->rxfis + RX_FIS_PIO_SETUP);
2275 break;
2276 case TASKFILE_NO_DATA:
2277 reply = (dd->port->rxfis + RX_FIS_D2H_REG);
2278 break;
2279 default:
2280 err = -EINVAL;
2281 goto abort;
2282 }
2283
Sam Bradshaw88523a62011-08-30 08:34:26 -06002284 /* Build the FIS. */
2285 memset(&fis, 0, sizeof(struct host_to_dev_fis));
2286
2287 fis.type = 0x27;
2288 fis.opts = 1 << 7;
2289 fis.command = req_task->io_ports[7];
2290 fis.features = req_task->io_ports[1];
2291 fis.sect_count = req_task->io_ports[2];
2292 fis.lba_low = req_task->io_ports[3];
2293 fis.lba_mid = req_task->io_ports[4];
2294 fis.lba_hi = req_task->io_ports[5];
2295 /* Clear the dev bit*/
2296 fis.device = req_task->io_ports[6] & ~0x10;
2297
2298 if ((req_task->in_flags.all == 0) && (req_task->out_flags.all & 1)) {
2299 req_task->in_flags.all =
2300 IDE_TASKFILE_STD_IN_FLAGS |
2301 (IDE_HOB_STD_IN_FLAGS << 8);
2302 fis.lba_low_ex = req_task->hob_ports[3];
2303 fis.lba_mid_ex = req_task->hob_ports[4];
2304 fis.lba_hi_ex = req_task->hob_ports[5];
2305 fis.features_ex = req_task->hob_ports[1];
2306 fis.sect_cnt_ex = req_task->hob_ports[2];
2307
2308 } else {
2309 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
2310 }
2311
2312 force_single_sector = implicit_sector(fis.command, fis.features);
2313
2314 if ((taskin || taskout) && (!fis.sect_count)) {
2315 if (nsect)
2316 fis.sect_count = nsect;
2317 else {
2318 if (!force_single_sector) {
2319 dev_warn(&dd->pdev->dev,
2320 "data movement but "
2321 "sect_count is 0\n");
Sam Bradshaw88523a62011-08-30 08:34:26 -06002322 err = -EINVAL;
2323 goto abort;
2324 }
2325 }
2326 }
2327
2328 dbg_printk(MTIP_DRV_NAME
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02002329 " %s: cmd %x, feat %x, nsect %x,"
Sam Bradshaw88523a62011-08-30 08:34:26 -06002330 " sect/lbal %x, lcyl/lbam %x, hcyl/lbah %x,"
2331 " head/dev %x\n",
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02002332 __func__,
Sam Bradshaw88523a62011-08-30 08:34:26 -06002333 fis.command,
2334 fis.features,
2335 fis.sect_count,
2336 fis.lba_low,
2337 fis.lba_mid,
2338 fis.lba_hi,
2339 fis.device);
2340
Selvan Mani4453bc82012-09-27 14:36:43 +02002341 /* check for erase mode support during secure erase.*/
Selvan Mani32087952012-11-07 06:03:37 -07002342 if ((fis.command == ATA_CMD_SEC_ERASE_UNIT) && outbuf &&
2343 (outbuf[0] & MTIP_SEC_ERASE_MODE)) {
Selvan Mani4453bc82012-09-27 14:36:43 +02002344 erasemode = 1;
2345 }
2346
2347 mtip_set_timeout(dd, &fis, &timeout, erasemode);
Sam Bradshaw88523a62011-08-30 08:34:26 -06002348
2349 /* Determine the correct transfer size.*/
2350 if (force_single_sector)
2351 transfer_size = ATA_SECT_SIZE;
2352 else
2353 transfer_size = ATA_SECT_SIZE * fis.sect_count;
2354
2355 /* Execute the command.*/
2356 if (mtip_exec_internal_command(dd->port,
2357 &fis,
2358 5,
2359 dma_buffer,
2360 transfer_size,
2361 0,
2362 GFP_KERNEL,
2363 timeout) < 0) {
Sam Bradshaw88523a62011-08-30 08:34:26 -06002364 err = -EIO;
2365 goto abort;
2366 }
2367
2368 task_file_data = readl(dd->port->mmio+PORT_TFDATA);
2369
2370 if ((req_task->data_phase == TASKFILE_IN) && !(task_file_data & 1)) {
2371 reply = dd->port->rxfis + RX_FIS_PIO_SETUP;
2372 req_task->io_ports[7] = reply->control;
2373 } else {
2374 reply = dd->port->rxfis + RX_FIS_D2H_REG;
2375 req_task->io_ports[7] = reply->command;
2376 }
2377
2378 /* reclaim the DMA buffers.*/
2379 if (inbuf_dma)
2380 pci_unmap_single(dd->pdev, inbuf_dma,
2381 taskin, DMA_FROM_DEVICE);
2382 if (outbuf_dma)
2383 pci_unmap_single(dd->pdev, outbuf_dma,
2384 taskout, DMA_TO_DEVICE);
Jens Axboe16d02c02011-09-27 15:50:01 -06002385 inbuf_dma = 0;
2386 outbuf_dma = 0;
Sam Bradshaw88523a62011-08-30 08:34:26 -06002387
2388 /* return the ATA registers to the caller.*/
2389 req_task->io_ports[1] = reply->features;
2390 req_task->io_ports[2] = reply->sect_count;
2391 req_task->io_ports[3] = reply->lba_low;
2392 req_task->io_ports[4] = reply->lba_mid;
2393 req_task->io_ports[5] = reply->lba_hi;
2394 req_task->io_ports[6] = reply->device;
2395
2396 if (req_task->out_flags.all & 1) {
2397
2398 req_task->hob_ports[3] = reply->lba_low_ex;
2399 req_task->hob_ports[4] = reply->lba_mid_ex;
2400 req_task->hob_ports[5] = reply->lba_hi_ex;
2401 req_task->hob_ports[1] = reply->features_ex;
2402 req_task->hob_ports[2] = reply->sect_cnt_ex;
2403 }
Sam Bradshaw88523a62011-08-30 08:34:26 -06002404 dbg_printk(MTIP_DRV_NAME
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02002405 " %s: Completion: stat %x,"
Sam Bradshaw88523a62011-08-30 08:34:26 -06002406 "err %x, sect_cnt %x, lbalo %x,"
2407 "lbamid %x, lbahi %x, dev %x\n",
2408 __func__,
2409 req_task->io_ports[7],
2410 req_task->io_ports[1],
2411 req_task->io_ports[2],
2412 req_task->io_ports[3],
2413 req_task->io_ports[4],
2414 req_task->io_ports[5],
2415 req_task->io_ports[6]);
2416
Sam Bradshaw88523a62011-08-30 08:34:26 -06002417 if (taskout) {
2418 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
2419 err = -EFAULT;
2420 goto abort;
2421 }
2422 }
2423 if (taskin) {
2424 if (copy_to_user(buf + intotal, inbuf, taskin)) {
2425 err = -EFAULT;
2426 goto abort;
2427 }
2428 }
2429abort:
2430 if (inbuf_dma)
2431 pci_unmap_single(dd->pdev, inbuf_dma,
2432 taskin, DMA_FROM_DEVICE);
2433 if (outbuf_dma)
2434 pci_unmap_single(dd->pdev, outbuf_dma,
2435 taskout, DMA_TO_DEVICE);
Sam Bradshaw88523a62011-08-30 08:34:26 -06002436 kfree(outbuf);
2437 kfree(inbuf);
2438
2439 return err;
2440}
2441
2442/*
2443 * Handle IOCTL calls from the Block Layer.
2444 *
2445 * This function is called by the Block Layer when it receives an IOCTL
2446 * command that it does not understand. If the IOCTL command is not supported
2447 * this function returns -ENOTTY.
2448 *
2449 * @dd Pointer to the driver data structure.
2450 * @cmd IOCTL command passed from the Block Layer.
2451 * @arg IOCTL argument passed from the Block Layer.
2452 *
2453 * return value
2454 * 0 The IOCTL completed successfully.
2455 * -ENOTTY The specified command is not supported.
2456 * -EFAULT An error occurred copying data to a user space buffer.
2457 * -EIO An error occurred while executing the command.
2458 */
Jens Axboeef0f1582011-09-27 21:19:53 -06002459static int mtip_hw_ioctl(struct driver_data *dd, unsigned int cmd,
2460 unsigned long arg)
Sam Bradshaw88523a62011-08-30 08:34:26 -06002461{
2462 switch (cmd) {
2463 case HDIO_GET_IDENTITY:
Asai Thambi S P971890f2012-05-29 18:41:47 -07002464 {
2465 if (copy_to_user((void __user *)arg, dd->port->identify,
2466 sizeof(u16) * ATA_ID_WORDS))
2467 return -EFAULT;
Sam Bradshaw88523a62011-08-30 08:34:26 -06002468 break;
Asai Thambi S P971890f2012-05-29 18:41:47 -07002469 }
Sam Bradshaw88523a62011-08-30 08:34:26 -06002470 case HDIO_DRIVE_CMD:
2471 {
2472 u8 drive_command[4];
2473
2474 /* Copy the user command info to our buffer. */
2475 if (copy_from_user(drive_command,
2476 (void __user *) arg,
2477 sizeof(drive_command)))
2478 return -EFAULT;
2479
2480 /* Execute the drive command. */
2481 if (exec_drive_command(dd->port,
2482 drive_command,
2483 (void __user *) (arg+4)))
2484 return -EIO;
2485
2486 /* Copy the status back to the users buffer. */
2487 if (copy_to_user((void __user *) arg,
2488 drive_command,
2489 sizeof(drive_command)))
2490 return -EFAULT;
2491
2492 break;
2493 }
2494 case HDIO_DRIVE_TASK:
2495 {
2496 u8 drive_command[7];
2497
2498 /* Copy the user command info to our buffer. */
2499 if (copy_from_user(drive_command,
2500 (void __user *) arg,
2501 sizeof(drive_command)))
2502 return -EFAULT;
2503
2504 /* Execute the drive command. */
2505 if (exec_drive_task(dd->port, drive_command))
2506 return -EIO;
2507
2508 /* Copy the status back to the users buffer. */
2509 if (copy_to_user((void __user *) arg,
2510 drive_command,
2511 sizeof(drive_command)))
2512 return -EFAULT;
2513
2514 break;
2515 }
Jens Axboeef0f1582011-09-27 21:19:53 -06002516 case HDIO_DRIVE_TASKFILE: {
2517 ide_task_request_t req_task;
2518 int ret, outtotal;
2519
2520 if (copy_from_user(&req_task, (void __user *) arg,
2521 sizeof(req_task)))
2522 return -EFAULT;
2523
2524 outtotal = sizeof(req_task);
2525
2526 ret = exec_drive_taskfile(dd, (void __user *) arg,
2527 &req_task, outtotal);
2528
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01002529 if (copy_to_user((void __user *) arg, &req_task,
2530 sizeof(req_task)))
Jens Axboeef0f1582011-09-27 21:19:53 -06002531 return -EFAULT;
2532
2533 return ret;
2534 }
Sam Bradshaw88523a62011-08-30 08:34:26 -06002535
2536 default:
2537 return -EINVAL;
2538 }
2539 return 0;
2540}
2541
2542/*
2543 * Submit an IO to the hw
2544 *
2545 * This function is called by the block layer to issue an io
2546 * to the device. Upon completion, the callback function will
2547 * be called with the data parameter passed as the callback data.
2548 *
2549 * @dd Pointer to the driver data structure.
2550 * @start First sector to read.
2551 * @nsect Number of sectors to read.
2552 * @nents Number of entries in scatter list for the read command.
2553 * @tag The tag of this read command.
2554 * @callback Pointer to the function that should be called
2555 * when the read completes.
2556 * @data Callback data passed to the callback function
2557 * when the read completes.
Sam Bradshaw88523a62011-08-30 08:34:26 -06002558 * @dir Direction (read or write)
2559 *
2560 * return value
2561 * None
2562 */
Jens Axboe7c5d6232012-11-08 07:58:53 +01002563static void mtip_hw_submit_io(struct driver_data *dd, sector_t sector,
Jens Axboe63166682011-09-27 21:27:43 -06002564 int nsect, int nents, int tag, void *callback,
Asai Thambi S P2077d942013-04-29 21:19:49 +02002565 void *data, int dir, int unaligned)
Sam Bradshaw88523a62011-08-30 08:34:26 -06002566{
2567 struct host_to_dev_fis *fis;
2568 struct mtip_port *port = dd->port;
2569 struct mtip_cmd *command = &port->commands[tag];
Asai Thambi S P45038362012-04-09 08:35:38 +02002570 int dma_dir = (dir == READ) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
Jens Axboe7c5d6232012-11-08 07:58:53 +01002571 u64 start = sector;
Sam Bradshaw88523a62011-08-30 08:34:26 -06002572
2573 /* Map the scatter list for DMA access */
Asai Thambi S P45038362012-04-09 08:35:38 +02002574 nents = dma_map_sg(&dd->pdev->dev, command->sg, nents, dma_dir);
Sam Bradshaw88523a62011-08-30 08:34:26 -06002575
2576 command->scatter_ents = nents;
2577
Asai Thambi S P2077d942013-04-29 21:19:49 +02002578 command->unaligned = unaligned;
Sam Bradshaw88523a62011-08-30 08:34:26 -06002579 /*
2580 * The number of retries for this command before it is
2581 * reported as a failure to the upper layers.
2582 */
2583 command->retries = MTIP_MAX_RETRIES;
2584
2585 /* Fill out fis */
2586 fis = command->command;
2587 fis->type = 0x27;
2588 fis->opts = 1 << 7;
2589 fis->command =
2590 (dir == READ ? ATA_CMD_FPDMA_READ : ATA_CMD_FPDMA_WRITE);
Selvan Manieda45312012-11-07 06:03:53 -07002591 fis->lba_low = start & 0xFF;
2592 fis->lba_mid = (start >> 8) & 0xFF;
2593 fis->lba_hi = (start >> 16) & 0xFF;
2594 fis->lba_low_ex = (start >> 24) & 0xFF;
2595 fis->lba_mid_ex = (start >> 32) & 0xFF;
2596 fis->lba_hi_ex = (start >> 40) & 0xFF;
Sam Bradshaw88523a62011-08-30 08:34:26 -06002597 fis->device = 1 << 6;
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01002598 fis->features = nsect & 0xFF;
2599 fis->features_ex = (nsect >> 8) & 0xFF;
Sam Bradshaw88523a62011-08-30 08:34:26 -06002600 fis->sect_count = ((tag << 3) | (tag >> 5));
2601 fis->sect_cnt_ex = 0;
2602 fis->control = 0;
2603 fis->res2 = 0;
2604 fis->res3 = 0;
2605 fill_command_sg(dd, command, nents);
2606
Asai Thambi S P2077d942013-04-29 21:19:49 +02002607 if (unaligned)
2608 fis->device |= 1 << 7;
2609
Sam Bradshaw88523a62011-08-30 08:34:26 -06002610 /* Populate the command header */
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01002611 command->command_header->opts =
2612 __force_bit2int cpu_to_le32(
2613 (nents << 16) | 5 | AHCI_CMD_PREFETCH);
Sam Bradshaw88523a62011-08-30 08:34:26 -06002614 command->command_header->byte_count = 0;
2615
2616 /*
2617 * Set the completion function and data for the command
2618 * within this layer.
2619 */
2620 command->comp_data = dd;
2621 command->comp_func = mtip_async_complete;
Asai Thambi S P45038362012-04-09 08:35:38 +02002622 command->direction = dma_dir;
Sam Bradshaw88523a62011-08-30 08:34:26 -06002623
2624 /*
2625 * Set the completion function and data for the command passed
2626 * from the upper layer.
2627 */
2628 command->async_data = data;
2629 command->async_callback = callback;
2630
2631 /*
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01002632 * To prevent this command from being issued
2633 * if an internal command is in progress or error handling is active.
Sam Bradshaw88523a62011-08-30 08:34:26 -06002634 */
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02002635 if (port->flags & MTIP_PF_PAUSE_IO) {
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01002636 set_bit(tag, port->cmds_to_issue);
Asai Thambi S P8a857a82012-04-09 08:35:38 +02002637 set_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags);
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01002638 return;
2639 }
Sam Bradshaw88523a62011-08-30 08:34:26 -06002640
2641 /* Issue the command to the hardware */
2642 mtip_issue_ncq_command(port, tag);
2643
Asai Thambi S Pdad40f12012-04-09 08:35:38 +02002644 return;
Sam Bradshaw88523a62011-08-30 08:34:26 -06002645}
2646
2647/*
2648 * Release a command slot.
2649 *
2650 * @dd Pointer to the driver data structure.
2651 * @tag Slot tag
2652 *
2653 * return value
2654 * None
2655 */
Asai Thambi S P2077d942013-04-29 21:19:49 +02002656static void mtip_hw_release_scatterlist(struct driver_data *dd, int tag,
2657 int unaligned)
Sam Bradshaw88523a62011-08-30 08:34:26 -06002658{
Asai Thambi S P2077d942013-04-29 21:19:49 +02002659 struct semaphore *sem = unaligned ? &dd->port->cmd_slot_unal :
2660 &dd->port->cmd_slot;
Sam Bradshaw88523a62011-08-30 08:34:26 -06002661 release_slot(dd->port, tag);
Asai Thambi S P2077d942013-04-29 21:19:49 +02002662 up(sem);
Sam Bradshaw88523a62011-08-30 08:34:26 -06002663}
2664
2665/*
2666 * Obtain a command slot and return its associated scatter list.
2667 *
2668 * @dd Pointer to the driver data structure.
2669 * @tag Pointer to an int that will receive the allocated command
2670 * slot tag.
2671 *
2672 * return value
2673 * Pointer to the scatter list for the allocated command slot
2674 * or NULL if no command slots are available.
2675 */
Jens Axboe63166682011-09-27 21:27:43 -06002676static struct scatterlist *mtip_hw_get_scatterlist(struct driver_data *dd,
Asai Thambi S P2077d942013-04-29 21:19:49 +02002677 int *tag, int unaligned)
Sam Bradshaw88523a62011-08-30 08:34:26 -06002678{
Asai Thambi S P2077d942013-04-29 21:19:49 +02002679 struct semaphore *sem = unaligned ? &dd->port->cmd_slot_unal :
2680 &dd->port->cmd_slot;
2681
Sam Bradshaw88523a62011-08-30 08:34:26 -06002682 /*
2683 * It is possible that, even with this semaphore, a thread
2684 * may think that no command slots are available. Therefore, we
2685 * need to make an attempt to get_slot().
2686 */
Asai Thambi S P2077d942013-04-29 21:19:49 +02002687 down(sem);
Sam Bradshaw88523a62011-08-30 08:34:26 -06002688 *tag = get_slot(dd->port);
2689
Asai Thambi S P8a857a82012-04-09 08:35:38 +02002690 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) {
Asai Thambi S P2077d942013-04-29 21:19:49 +02002691 up(sem);
Asai Thambi S P45038362012-04-09 08:35:38 +02002692 return NULL;
2693 }
Asai Thambi S Pa09ba132012-04-16 21:27:55 +02002694 if (unlikely(*tag < 0)) {
Asai Thambi S P2077d942013-04-29 21:19:49 +02002695 up(sem);
Sam Bradshaw88523a62011-08-30 08:34:26 -06002696 return NULL;
Asai Thambi S Pa09ba132012-04-16 21:27:55 +02002697 }
Sam Bradshaw88523a62011-08-30 08:34:26 -06002698
2699 return dd->port->commands[*tag].sg;
2700}
2701
2702/*
Asai Thambi S P7412ff12012-06-04 12:43:03 -07002703 * Sysfs status dump.
Sam Bradshaw88523a62011-08-30 08:34:26 -06002704 *
2705 * @dev Pointer to the device structure, passed by the kernrel.
2706 * @attr Pointer to the device_attribute structure passed by the kernel.
2707 * @buf Pointer to the char buffer that will receive the stats info.
2708 *
2709 * return value
2710 * The size, in bytes, of the data copied into buf.
2711 */
Asai Thambi S Pf6587212012-04-09 08:35:38 +02002712static ssize_t mtip_hw_show_status(struct device *dev,
2713 struct device_attribute *attr,
2714 char *buf)
2715{
2716 struct driver_data *dd = dev_to_disk(dev)->private_data;
2717 int size = 0;
2718
Asai Thambi S P8a857a82012-04-09 08:35:38 +02002719 if (test_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag))
Asai Thambi S Pf6587212012-04-09 08:35:38 +02002720 size += sprintf(buf, "%s", "thermal_shutdown\n");
Asai Thambi S P8a857a82012-04-09 08:35:38 +02002721 else if (test_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag))
Asai Thambi S Pf6587212012-04-09 08:35:38 +02002722 size += sprintf(buf, "%s", "write_protect\n");
2723 else
2724 size += sprintf(buf, "%s", "online\n");
2725
2726 return size;
2727}
2728
Asai Thambi S Pf6587212012-04-09 08:35:38 +02002729static DEVICE_ATTR(status, S_IRUGO, mtip_hw_show_status, NULL);
Sam Bradshaw88523a62011-08-30 08:34:26 -06002730
Asai Thambi S P0caff002013-04-03 19:56:21 +05302731/* debugsfs entries */
2732
2733static ssize_t show_device_status(struct device_driver *drv, char *buf)
2734{
2735 int size = 0;
2736 struct driver_data *dd, *tmp;
2737 unsigned long flags;
2738 char id_buf[42];
2739 u16 status = 0;
2740
2741 spin_lock_irqsave(&dev_lock, flags);
2742 size += sprintf(&buf[size], "Devices Present:\n");
2743 list_for_each_entry_safe(dd, tmp, &online_list, online_list) {
Jens Axboec66bb3f2013-04-04 09:03:41 +02002744 if (dd->pdev) {
Asai Thambi S P0caff002013-04-03 19:56:21 +05302745 if (dd->port &&
2746 dd->port->identify &&
2747 dd->port->identify_valid) {
2748 strlcpy(id_buf,
2749 (char *) (dd->port->identify + 10), 21);
2750 status = *(dd->port->identify + 141);
2751 } else {
2752 memset(id_buf, 0, 42);
2753 status = 0;
2754 }
2755
2756 if (dd->port &&
2757 test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags)) {
2758 size += sprintf(&buf[size],
2759 " device %s %s (ftl rebuild %d %%)\n",
2760 dev_name(&dd->pdev->dev),
2761 id_buf,
2762 status);
2763 } else {
2764 size += sprintf(&buf[size],
2765 " device %s %s\n",
2766 dev_name(&dd->pdev->dev),
2767 id_buf);
2768 }
2769 }
2770 }
2771
2772 size += sprintf(&buf[size], "Devices Being Removed:\n");
2773 list_for_each_entry_safe(dd, tmp, &removing_list, remove_list) {
Jens Axboec66bb3f2013-04-04 09:03:41 +02002774 if (dd->pdev) {
Asai Thambi S P0caff002013-04-03 19:56:21 +05302775 if (dd->port &&
2776 dd->port->identify &&
2777 dd->port->identify_valid) {
2778 strlcpy(id_buf,
2779 (char *) (dd->port->identify+10), 21);
2780 status = *(dd->port->identify + 141);
2781 } else {
2782 memset(id_buf, 0, 42);
2783 status = 0;
2784 }
2785
2786 if (dd->port &&
2787 test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags)) {
2788 size += sprintf(&buf[size],
2789 " device %s %s (ftl rebuild %d %%)\n",
2790 dev_name(&dd->pdev->dev),
2791 id_buf,
2792 status);
2793 } else {
2794 size += sprintf(&buf[size],
2795 " device %s %s\n",
2796 dev_name(&dd->pdev->dev),
2797 id_buf);
2798 }
2799 }
2800 }
2801 spin_unlock_irqrestore(&dev_lock, flags);
2802
2803 return size;
2804}
2805
2806static ssize_t mtip_hw_read_device_status(struct file *f, char __user *ubuf,
2807 size_t len, loff_t *offset)
2808{
2809 int size = *offset;
2810 char buf[MTIP_DFS_MAX_BUF_SIZE];
2811
2812 if (!len || *offset)
2813 return 0;
2814
2815 size += show_device_status(NULL, buf);
2816
2817 *offset = size <= len ? size : len;
2818 size = copy_to_user(ubuf, buf, *offset);
2819 if (size)
2820 return -EFAULT;
2821
2822 return *offset;
2823}
2824
Asai Thambi S P7b421d22012-06-04 12:44:02 -07002825static ssize_t mtip_hw_read_registers(struct file *f, char __user *ubuf,
2826 size_t len, loff_t *offset)
2827{
2828 struct driver_data *dd = (struct driver_data *)f->private_data;
2829 char buf[MTIP_DFS_MAX_BUF_SIZE];
2830 u32 group_allocated;
2831 int size = *offset;
2832 int n;
2833
2834 if (!len || size)
2835 return 0;
2836
Asai Thambi S P7b421d22012-06-04 12:44:02 -07002837 size += sprintf(&buf[size], "H/ S ACTive : [ 0x");
2838
2839 for (n = dd->slot_groups-1; n >= 0; n--)
2840 size += sprintf(&buf[size], "%08X ",
2841 readl(dd->port->s_active[n]));
2842
2843 size += sprintf(&buf[size], "]\n");
2844 size += sprintf(&buf[size], "H/ Command Issue : [ 0x");
2845
2846 for (n = dd->slot_groups-1; n >= 0; n--)
2847 size += sprintf(&buf[size], "%08X ",
2848 readl(dd->port->cmd_issue[n]));
2849
2850 size += sprintf(&buf[size], "]\n");
2851 size += sprintf(&buf[size], "H/ Completed : [ 0x");
2852
2853 for (n = dd->slot_groups-1; n >= 0; n--)
2854 size += sprintf(&buf[size], "%08X ",
2855 readl(dd->port->completed[n]));
2856
2857 size += sprintf(&buf[size], "]\n");
2858 size += sprintf(&buf[size], "H/ PORT IRQ STAT : [ 0x%08X ]\n",
2859 readl(dd->port->mmio + PORT_IRQ_STAT));
2860 size += sprintf(&buf[size], "H/ HOST IRQ STAT : [ 0x%08X ]\n",
2861 readl(dd->mmio + HOST_IRQ_STAT));
2862 size += sprintf(&buf[size], "\n");
2863
2864 size += sprintf(&buf[size], "L/ Allocated : [ 0x");
2865
2866 for (n = dd->slot_groups-1; n >= 0; n--) {
2867 if (sizeof(long) > sizeof(u32))
2868 group_allocated =
2869 dd->port->allocated[n/2] >> (32*(n&1));
2870 else
2871 group_allocated = dd->port->allocated[n];
2872 size += sprintf(&buf[size], "%08X ", group_allocated);
2873 }
2874 size += sprintf(&buf[size], "]\n");
2875
2876 size += sprintf(&buf[size], "L/ Commands in Q : [ 0x");
2877
2878 for (n = dd->slot_groups-1; n >= 0; n--) {
2879 if (sizeof(long) > sizeof(u32))
2880 group_allocated =
2881 dd->port->cmds_to_issue[n/2] >> (32*(n&1));
2882 else
2883 group_allocated = dd->port->cmds_to_issue[n];
2884 size += sprintf(&buf[size], "%08X ", group_allocated);
2885 }
2886 size += sprintf(&buf[size], "]\n");
2887
2888 *offset = size <= len ? size : len;
2889 size = copy_to_user(ubuf, buf, *offset);
2890 if (size)
2891 return -EFAULT;
2892
2893 return *offset;
2894}
2895
2896static ssize_t mtip_hw_read_flags(struct file *f, char __user *ubuf,
2897 size_t len, loff_t *offset)
2898{
2899 struct driver_data *dd = (struct driver_data *)f->private_data;
2900 char buf[MTIP_DFS_MAX_BUF_SIZE];
2901 int size = *offset;
2902
2903 if (!len || size)
2904 return 0;
2905
Asai Thambi S P7b421d22012-06-04 12:44:02 -07002906 size += sprintf(&buf[size], "Flag-port : [ %08lX ]\n",
2907 dd->port->flags);
2908 size += sprintf(&buf[size], "Flag-dd : [ %08lX ]\n",
2909 dd->dd_flag);
2910
2911 *offset = size <= len ? size : len;
2912 size = copy_to_user(ubuf, buf, *offset);
2913 if (size)
2914 return -EFAULT;
2915
2916 return *offset;
2917}
2918
Asai Thambi S P0caff002013-04-03 19:56:21 +05302919static const struct file_operations mtip_device_status_fops = {
2920 .owner = THIS_MODULE,
2921 .open = simple_open,
2922 .read = mtip_hw_read_device_status,
2923 .llseek = no_llseek,
2924};
2925
Asai Thambi S P7b421d22012-06-04 12:44:02 -07002926static const struct file_operations mtip_regs_fops = {
2927 .owner = THIS_MODULE,
2928 .open = simple_open,
2929 .read = mtip_hw_read_registers,
2930 .llseek = no_llseek,
2931};
2932
2933static const struct file_operations mtip_flags_fops = {
2934 .owner = THIS_MODULE,
2935 .open = simple_open,
2936 .read = mtip_hw_read_flags,
2937 .llseek = no_llseek,
2938};
2939
Sam Bradshaw88523a62011-08-30 08:34:26 -06002940/*
2941 * Create the sysfs related attributes.
2942 *
2943 * @dd Pointer to the driver data structure.
2944 * @kobj Pointer to the kobj for the block device.
2945 *
2946 * return value
2947 * 0 Operation completed successfully.
2948 * -EINVAL Invalid parameter.
2949 */
Jens Axboe63166682011-09-27 21:27:43 -06002950static int mtip_hw_sysfs_init(struct driver_data *dd, struct kobject *kobj)
Sam Bradshaw88523a62011-08-30 08:34:26 -06002951{
2952 if (!kobj || !dd)
2953 return -EINVAL;
2954
Asai Thambi S Pf6587212012-04-09 08:35:38 +02002955 if (sysfs_create_file(kobj, &dev_attr_status.attr))
2956 dev_warn(&dd->pdev->dev,
2957 "Error creating 'status' sysfs entry\n");
Sam Bradshaw88523a62011-08-30 08:34:26 -06002958 return 0;
2959}
2960
2961/*
2962 * Remove the sysfs related attributes.
2963 *
2964 * @dd Pointer to the driver data structure.
2965 * @kobj Pointer to the kobj for the block device.
2966 *
2967 * return value
2968 * 0 Operation completed successfully.
2969 * -EINVAL Invalid parameter.
2970 */
Jens Axboe63166682011-09-27 21:27:43 -06002971static int mtip_hw_sysfs_exit(struct driver_data *dd, struct kobject *kobj)
Sam Bradshaw88523a62011-08-30 08:34:26 -06002972{
2973 if (!kobj || !dd)
2974 return -EINVAL;
2975
Asai Thambi S Pf6587212012-04-09 08:35:38 +02002976 sysfs_remove_file(kobj, &dev_attr_status.attr);
Sam Bradshaw88523a62011-08-30 08:34:26 -06002977
2978 return 0;
2979}
2980
Asai Thambi S P7b421d22012-06-04 12:44:02 -07002981static int mtip_hw_debugfs_init(struct driver_data *dd)
2982{
2983 if (!dfs_parent)
2984 return -1;
2985
2986 dd->dfs_node = debugfs_create_dir(dd->disk->disk_name, dfs_parent);
2987 if (IS_ERR_OR_NULL(dd->dfs_node)) {
2988 dev_warn(&dd->pdev->dev,
2989 "Error creating node %s under debugfs\n",
2990 dd->disk->disk_name);
2991 dd->dfs_node = NULL;
2992 return -1;
2993 }
2994
2995 debugfs_create_file("flags", S_IRUGO, dd->dfs_node, dd,
2996 &mtip_flags_fops);
2997 debugfs_create_file("registers", S_IRUGO, dd->dfs_node, dd,
2998 &mtip_regs_fops);
2999
3000 return 0;
3001}
3002
3003static void mtip_hw_debugfs_exit(struct driver_data *dd)
3004{
3005 debugfs_remove_recursive(dd->dfs_node);
3006}
3007
3008
Sam Bradshaw88523a62011-08-30 08:34:26 -06003009/*
3010 * Perform any init/resume time hardware setup
3011 *
3012 * @dd Pointer to the driver data structure.
3013 *
3014 * return value
3015 * None
3016 */
3017static inline void hba_setup(struct driver_data *dd)
3018{
3019 u32 hwdata;
3020 hwdata = readl(dd->mmio + HOST_HSORG);
3021
3022 /* interrupt bug workaround: use only 1 IS bit.*/
3023 writel(hwdata |
3024 HSORG_DISABLE_SLOTGRP_INTR |
3025 HSORG_DISABLE_SLOTGRP_PXIS,
3026 dd->mmio + HOST_HSORG);
3027}
3028
Asai Thambi S P2077d942013-04-29 21:19:49 +02003029static int mtip_device_unaligned_constrained(struct driver_data *dd)
3030{
3031 return (dd->pdev->device == P420M_DEVICE_ID ? 1 : 0);
3032}
3033
Sam Bradshaw88523a62011-08-30 08:34:26 -06003034/*
3035 * Detect the details of the product, and store anything needed
3036 * into the driver data structure. This includes product type and
3037 * version and number of slot groups.
3038 *
3039 * @dd Pointer to the driver data structure.
3040 *
3041 * return value
3042 * None
3043 */
3044static void mtip_detect_product(struct driver_data *dd)
3045{
3046 u32 hwdata;
3047 unsigned int rev, slotgroups;
3048
3049 /*
3050 * HBA base + 0xFC [15:0] - vendor-specific hardware interface
3051 * info register:
3052 * [15:8] hardware/software interface rev#
3053 * [ 3] asic-style interface
3054 * [ 2:0] number of slot groups, minus 1 (only valid for asic-style).
3055 */
3056 hwdata = readl(dd->mmio + HOST_HSORG);
3057
3058 dd->product_type = MTIP_PRODUCT_UNKNOWN;
3059 dd->slot_groups = 1;
3060
3061 if (hwdata & 0x8) {
3062 dd->product_type = MTIP_PRODUCT_ASICFPGA;
3063 rev = (hwdata & HSORG_HWREV) >> 8;
3064 slotgroups = (hwdata & HSORG_SLOTGROUPS) + 1;
3065 dev_info(&dd->pdev->dev,
3066 "ASIC-FPGA design, HS rev 0x%x, "
3067 "%i slot groups [%i slots]\n",
3068 rev,
3069 slotgroups,
3070 slotgroups * 32);
3071
3072 if (slotgroups > MTIP_MAX_SLOT_GROUPS) {
3073 dev_warn(&dd->pdev->dev,
3074 "Warning: driver only supports "
3075 "%i slot groups.\n", MTIP_MAX_SLOT_GROUPS);
3076 slotgroups = MTIP_MAX_SLOT_GROUPS;
3077 }
3078 dd->slot_groups = slotgroups;
3079 return;
3080 }
3081
3082 dev_warn(&dd->pdev->dev, "Unrecognized product id\n");
3083}
3084
3085/*
3086 * Blocking wait for FTL rebuild to complete
3087 *
3088 * @dd Pointer to the DRIVER_DATA structure.
3089 *
3090 * return value
3091 * 0 FTL rebuild completed successfully
3092 * -EFAULT FTL rebuild error/timeout/interruption
3093 */
3094static int mtip_ftl_rebuild_poll(struct driver_data *dd)
3095{
3096 unsigned long timeout, cnt = 0, start;
3097
3098 dev_warn(&dd->pdev->dev,
3099 "FTL rebuild in progress. Polling for completion.\n");
3100
3101 start = jiffies;
Sam Bradshaw88523a62011-08-30 08:34:26 -06003102 timeout = jiffies + msecs_to_jiffies(MTIP_FTL_REBUILD_TIMEOUT_MS);
3103
3104 do {
Asai Thambi S P8a857a82012-04-09 08:35:38 +02003105 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
Asai Thambi S P45038362012-04-09 08:35:38 +02003106 &dd->dd_flag)))
3107 return -EFAULT;
Sam Bradshaw88523a62011-08-30 08:34:26 -06003108 if (mtip_check_surprise_removal(dd->pdev))
3109 return -EFAULT;
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01003110
Sam Bradshaw88523a62011-08-30 08:34:26 -06003111 if (mtip_get_identify(dd->port, NULL) < 0)
3112 return -EFAULT;
3113
3114 if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) ==
3115 MTIP_FTL_REBUILD_MAGIC) {
3116 ssleep(1);
3117 /* Print message every 3 minutes */
3118 if (cnt++ >= 180) {
3119 dev_warn(&dd->pdev->dev,
3120 "FTL rebuild in progress (%d secs).\n",
3121 jiffies_to_msecs(jiffies - start) / 1000);
3122 cnt = 0;
3123 }
3124 } else {
3125 dev_warn(&dd->pdev->dev,
3126 "FTL rebuild complete (%d secs).\n",
3127 jiffies_to_msecs(jiffies - start) / 1000);
Asai Thambi S P62ee8c12012-01-04 22:01:32 +01003128 mtip_block_initialize(dd);
Asai Thambi S P45038362012-04-09 08:35:38 +02003129 return 0;
Sam Bradshaw88523a62011-08-30 08:34:26 -06003130 }
3131 ssleep(10);
3132 } while (time_before(jiffies, timeout));
3133
3134 /* Check for timeout */
Asai Thambi S P45038362012-04-09 08:35:38 +02003135 dev_err(&dd->pdev->dev,
Sam Bradshaw88523a62011-08-30 08:34:26 -06003136 "Timed out waiting for FTL rebuild to complete (%d secs).\n",
3137 jiffies_to_msecs(jiffies - start) / 1000);
Asai Thambi S P45038362012-04-09 08:35:38 +02003138 return -EFAULT;
Sam Bradshaw88523a62011-08-30 08:34:26 -06003139}
3140
3141/*
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01003142 * service thread to issue queued commands
3143 *
3144 * @data Pointer to the driver data structure.
3145 *
3146 * return value
3147 * 0
3148 */
3149
3150static int mtip_service_thread(void *data)
3151{
3152 struct driver_data *dd = (struct driver_data *)data;
3153 unsigned long slot, slot_start, slot_wrap;
3154 unsigned int num_cmd_slots = dd->slot_groups * 32;
3155 struct mtip_port *port = dd->port;
3156
3157 while (1) {
3158 /*
3159 * the condition is to check neither an internal command is
3160 * is in progress nor error handling is active
3161 */
3162 wait_event_interruptible(port->svc_wait, (port->flags) &&
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02003163 !(port->flags & MTIP_PF_PAUSE_IO));
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01003164
3165 if (kthread_should_stop())
3166 break;
3167
Asai Thambi S P8a857a82012-04-09 08:35:38 +02003168 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
Asai Thambi S P45038362012-04-09 08:35:38 +02003169 &dd->dd_flag)))
3170 break;
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02003171
Asai Thambi S P8a857a82012-04-09 08:35:38 +02003172 set_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags);
3173 if (test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) {
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01003174 slot = 1;
3175 /* used to restrict the loop to one iteration */
3176 slot_start = num_cmd_slots;
3177 slot_wrap = 0;
3178 while (1) {
3179 slot = find_next_bit(port->cmds_to_issue,
3180 num_cmd_slots, slot);
3181 if (slot_wrap == 1) {
3182 if ((slot_start >= slot) ||
3183 (slot >= num_cmd_slots))
3184 break;
3185 }
3186 if (unlikely(slot_start == num_cmd_slots))
3187 slot_start = slot;
3188
3189 if (unlikely(slot == num_cmd_slots)) {
3190 slot = 1;
3191 slot_wrap = 1;
3192 continue;
3193 }
3194
3195 /* Issue the command to the hardware */
3196 mtip_issue_ncq_command(port, slot);
3197
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01003198 clear_bit(slot, port->cmds_to_issue);
3199 }
3200
Asai Thambi S P8a857a82012-04-09 08:35:38 +02003201 clear_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags);
3202 } else if (test_bit(MTIP_PF_REBUILD_BIT, &port->flags)) {
Asai Thambi S P8182b492012-04-09 08:35:38 +02003203 if (!mtip_ftl_rebuild_poll(dd))
Asai Thambi S P8a857a82012-04-09 08:35:38 +02003204 set_bit(MTIP_DDF_REBUILD_FAILED_BIT,
Asai Thambi S P8182b492012-04-09 08:35:38 +02003205 &dd->dd_flag);
Asai Thambi S P8a857a82012-04-09 08:35:38 +02003206 clear_bit(MTIP_PF_REBUILD_BIT, &port->flags);
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01003207 }
Asai Thambi S P8a857a82012-04-09 08:35:38 +02003208 clear_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags);
Asai Thambi S P62ee8c12012-01-04 22:01:32 +01003209
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02003210 if (test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags))
Asai Thambi S P62ee8c12012-01-04 22:01:32 +01003211 break;
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01003212 }
3213 return 0;
3214}
3215
3216/*
Sam Bradshaw88523a62011-08-30 08:34:26 -06003217 * Called once for each card.
3218 *
3219 * @dd Pointer to the driver data structure.
3220 *
3221 * return value
3222 * 0 on success, else an error code.
3223 */
Jens Axboe63166682011-09-27 21:27:43 -06003224static int mtip_hw_init(struct driver_data *dd)
Sam Bradshaw88523a62011-08-30 08:34:26 -06003225{
3226 int i;
3227 int rv;
3228 unsigned int num_command_slots;
Asai Thambi S P45038362012-04-09 08:35:38 +02003229 unsigned long timeout, timetaken;
Asai Thambi S Pf6587212012-04-09 08:35:38 +02003230 unsigned char *buf;
3231 struct smart_attr attr242;
Sam Bradshaw88523a62011-08-30 08:34:26 -06003232
3233 dd->mmio = pcim_iomap_table(dd->pdev)[MTIP_ABAR];
3234
3235 mtip_detect_product(dd);
3236 if (dd->product_type == MTIP_PRODUCT_UNKNOWN) {
3237 rv = -EIO;
3238 goto out1;
3239 }
3240 num_command_slots = dd->slot_groups * 32;
3241
3242 hba_setup(dd);
3243
Asai Thambi S P16c906e52012-12-20 07:46:25 -08003244 dd->port = kzalloc_node(sizeof(struct mtip_port), GFP_KERNEL,
3245 dd->numa_node);
Sam Bradshaw88523a62011-08-30 08:34:26 -06003246 if (!dd->port) {
3247 dev_err(&dd->pdev->dev,
3248 "Memory allocation: port structure\n");
3249 return -ENOMEM;
3250 }
3251
Asai Thambi S P16c906e52012-12-20 07:46:25 -08003252 /* Continue workqueue setup */
3253 for (i = 0; i < MTIP_MAX_SLOT_GROUPS; i++)
3254 dd->work[i].port = dd->port;
3255
Asai Thambi S P2077d942013-04-29 21:19:49 +02003256 /* Enable unaligned IO constraints for some devices */
3257 if (mtip_device_unaligned_constrained(dd))
3258 dd->unal_qdepth = MTIP_MAX_UNALIGNED_SLOTS;
3259 else
3260 dd->unal_qdepth = 0;
3261
Sam Bradshaw88523a62011-08-30 08:34:26 -06003262 /* Counting semaphore to track command slot usage */
Asai Thambi S P2077d942013-04-29 21:19:49 +02003263 sema_init(&dd->port->cmd_slot, num_command_slots - 1 - dd->unal_qdepth);
3264 sema_init(&dd->port->cmd_slot_unal, dd->unal_qdepth);
Sam Bradshaw88523a62011-08-30 08:34:26 -06003265
3266 /* Spinlock to prevent concurrent issue */
Asai Thambi S P16c906e52012-12-20 07:46:25 -08003267 for (i = 0; i < MTIP_MAX_SLOT_GROUPS; i++)
3268 spin_lock_init(&dd->port->cmd_issue_lock[i]);
Sam Bradshaw88523a62011-08-30 08:34:26 -06003269
3270 /* Set the port mmio base address. */
3271 dd->port->mmio = dd->mmio + PORT_OFFSET;
3272 dd->port->dd = dd;
3273
3274 /* Allocate memory for the command list. */
3275 dd->port->command_list =
3276 dmam_alloc_coherent(&dd->pdev->dev,
Asai Thambi S Pf6587212012-04-09 08:35:38 +02003277 HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4),
Sam Bradshaw88523a62011-08-30 08:34:26 -06003278 &dd->port->command_list_dma,
3279 GFP_KERNEL);
3280 if (!dd->port->command_list) {
3281 dev_err(&dd->pdev->dev,
3282 "Memory allocation: command list\n");
3283 rv = -ENOMEM;
3284 goto out1;
3285 }
3286
3287 /* Clear the memory we have allocated. */
3288 memset(dd->port->command_list,
3289 0,
Asai Thambi S Pf6587212012-04-09 08:35:38 +02003290 HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4));
Sam Bradshaw88523a62011-08-30 08:34:26 -06003291
3292 /* Setup the addresse of the RX FIS. */
3293 dd->port->rxfis = dd->port->command_list + HW_CMD_SLOT_SZ;
3294 dd->port->rxfis_dma = dd->port->command_list_dma + HW_CMD_SLOT_SZ;
3295
3296 /* Setup the address of the command tables. */
3297 dd->port->command_table = dd->port->rxfis + AHCI_RX_FIS_SZ;
3298 dd->port->command_tbl_dma = dd->port->rxfis_dma + AHCI_RX_FIS_SZ;
3299
3300 /* Setup the address of the identify data. */
3301 dd->port->identify = dd->port->command_table +
3302 HW_CMD_TBL_AR_SZ;
3303 dd->port->identify_dma = dd->port->command_tbl_dma +
3304 HW_CMD_TBL_AR_SZ;
3305
Asai Thambi S Pf6587212012-04-09 08:35:38 +02003306 /* Setup the address of the sector buffer - for some non-ncq cmds */
Sam Bradshaw88523a62011-08-30 08:34:26 -06003307 dd->port->sector_buffer = (void *) dd->port->identify + ATA_SECT_SIZE;
3308 dd->port->sector_buffer_dma = dd->port->identify_dma + ATA_SECT_SIZE;
3309
Asai Thambi S Pf6587212012-04-09 08:35:38 +02003310 /* Setup the address of the log buf - for read log command */
3311 dd->port->log_buf = (void *)dd->port->sector_buffer + ATA_SECT_SIZE;
3312 dd->port->log_buf_dma = dd->port->sector_buffer_dma + ATA_SECT_SIZE;
3313
3314 /* Setup the address of the smart buf - for smart read data command */
3315 dd->port->smart_buf = (void *)dd->port->log_buf + ATA_SECT_SIZE;
3316 dd->port->smart_buf_dma = dd->port->log_buf_dma + ATA_SECT_SIZE;
3317
3318
Sam Bradshaw88523a62011-08-30 08:34:26 -06003319 /* Point the command headers at the command tables. */
3320 for (i = 0; i < num_command_slots; i++) {
3321 dd->port->commands[i].command_header =
3322 dd->port->command_list +
3323 (sizeof(struct mtip_cmd_hdr) * i);
3324 dd->port->commands[i].command_header_dma =
3325 dd->port->command_list_dma +
3326 (sizeof(struct mtip_cmd_hdr) * i);
3327
3328 dd->port->commands[i].command =
3329 dd->port->command_table + (HW_CMD_TBL_SZ * i);
3330 dd->port->commands[i].command_dma =
3331 dd->port->command_tbl_dma + (HW_CMD_TBL_SZ * i);
3332
3333 if (readl(dd->mmio + HOST_CAP) & HOST_CAP_64)
3334 dd->port->commands[i].command_header->ctbau =
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01003335 __force_bit2int cpu_to_le32(
Sam Bradshaw88523a62011-08-30 08:34:26 -06003336 (dd->port->commands[i].command_dma >> 16) >> 16);
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01003337 dd->port->commands[i].command_header->ctba =
3338 __force_bit2int cpu_to_le32(
3339 dd->port->commands[i].command_dma & 0xFFFFFFFF);
Sam Bradshaw88523a62011-08-30 08:34:26 -06003340
3341 /*
3342 * If this is not done, a bug is reported by the stock
3343 * FC11 i386. Due to the fact that it has lots of kernel
3344 * debugging enabled.
3345 */
3346 sg_init_table(dd->port->commands[i].sg, MTIP_MAX_SG);
3347
3348 /* Mark all commands as currently inactive.*/
3349 atomic_set(&dd->port->commands[i].active, 0);
3350 }
3351
3352 /* Setup the pointers to the extended s_active and CI registers. */
3353 for (i = 0; i < dd->slot_groups; i++) {
3354 dd->port->s_active[i] =
3355 dd->port->mmio + i*0x80 + PORT_SCR_ACT;
3356 dd->port->cmd_issue[i] =
3357 dd->port->mmio + i*0x80 + PORT_COMMAND_ISSUE;
3358 dd->port->completed[i] =
3359 dd->port->mmio + i*0x80 + PORT_SDBV;
3360 }
3361
Asai Thambi S P45038362012-04-09 08:35:38 +02003362 timetaken = jiffies;
3363 timeout = jiffies + msecs_to_jiffies(30000);
3364 while (((readl(dd->port->mmio + PORT_SCR_STAT) & 0x0F) != 0x03) &&
3365 time_before(jiffies, timeout)) {
3366 mdelay(100);
3367 }
3368 if (unlikely(mtip_check_surprise_removal(dd->pdev))) {
3369 timetaken = jiffies - timetaken;
3370 dev_warn(&dd->pdev->dev,
3371 "Surprise removal detected at %u ms\n",
3372 jiffies_to_msecs(timetaken));
3373 rv = -ENODEV;
3374 goto out2 ;
3375 }
Asai Thambi S P8a857a82012-04-09 08:35:38 +02003376 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) {
Asai Thambi S P45038362012-04-09 08:35:38 +02003377 timetaken = jiffies - timetaken;
3378 dev_warn(&dd->pdev->dev,
3379 "Removal detected at %u ms\n",
3380 jiffies_to_msecs(timetaken));
3381 rv = -EFAULT;
Sam Bradshaw88523a62011-08-30 08:34:26 -06003382 goto out2;
3383 }
3384
Asai Thambi S P45038362012-04-09 08:35:38 +02003385 /* Conditionally reset the HBA. */
3386 if (!(readl(dd->mmio + HOST_CAP) & HOST_CAP_NZDMA)) {
3387 if (mtip_hba_reset(dd) < 0) {
3388 dev_err(&dd->pdev->dev,
3389 "Card did not reset within timeout\n");
3390 rv = -EIO;
3391 goto out2;
3392 }
3393 } else {
3394 /* Clear any pending interrupts on the HBA */
3395 writel(readl(dd->mmio + HOST_IRQ_STAT),
3396 dd->mmio + HOST_IRQ_STAT);
3397 }
3398
Sam Bradshaw88523a62011-08-30 08:34:26 -06003399 mtip_init_port(dd->port);
3400 mtip_start_port(dd->port);
3401
3402 /* Setup the ISR and enable interrupts. */
3403 rv = devm_request_irq(&dd->pdev->dev,
3404 dd->pdev->irq,
3405 mtip_irq_handler,
3406 IRQF_SHARED,
3407 dev_driver_string(&dd->pdev->dev),
3408 dd);
3409
3410 if (rv) {
3411 dev_err(&dd->pdev->dev,
3412 "Unable to allocate IRQ %d\n", dd->pdev->irq);
3413 goto out2;
3414 }
Asai Thambi S P16c906e52012-12-20 07:46:25 -08003415 irq_set_affinity_hint(dd->pdev->irq, get_cpu_mask(dd->isr_binding));
Sam Bradshaw88523a62011-08-30 08:34:26 -06003416
3417 /* Enable interrupts on the HBA. */
3418 writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN,
3419 dd->mmio + HOST_CTL);
3420
3421 init_timer(&dd->port->cmd_timer);
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01003422 init_waitqueue_head(&dd->port->svc_wait);
3423
Sam Bradshaw88523a62011-08-30 08:34:26 -06003424 dd->port->cmd_timer.data = (unsigned long int) dd->port;
3425 dd->port->cmd_timer.function = mtip_timeout_function;
3426 mod_timer(&dd->port->cmd_timer,
3427 jiffies + msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD));
3428
Asai Thambi S P45038362012-04-09 08:35:38 +02003429
Asai Thambi S P8a857a82012-04-09 08:35:38 +02003430 if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) {
Asai Thambi S P45038362012-04-09 08:35:38 +02003431 rv = -EFAULT;
3432 goto out3;
3433 }
3434
Sam Bradshaw88523a62011-08-30 08:34:26 -06003435 if (mtip_get_identify(dd->port, NULL) < 0) {
3436 rv = -EFAULT;
3437 goto out3;
3438 }
Sam Bradshaw88523a62011-08-30 08:34:26 -06003439
3440 if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) ==
3441 MTIP_FTL_REBUILD_MAGIC) {
Asai Thambi S P8a857a82012-04-09 08:35:38 +02003442 set_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags);
Asai Thambi S P62ee8c12012-01-04 22:01:32 +01003443 return MTIP_FTL_REBUILD_MAGIC;
Sam Bradshaw88523a62011-08-30 08:34:26 -06003444 }
Asai Thambi S P62ee8c12012-01-04 22:01:32 +01003445 mtip_dump_identify(dd->port);
Asai Thambi S Pf6587212012-04-09 08:35:38 +02003446
3447 /* check write protect, over temp and rebuild statuses */
3448 rv = mtip_read_log_page(dd->port, ATA_LOG_SATA_NCQ,
3449 dd->port->log_buf,
3450 dd->port->log_buf_dma, 1);
3451 if (rv) {
3452 dev_warn(&dd->pdev->dev,
3453 "Error in READ LOG EXT (10h) command\n");
3454 /* non-critical error, don't fail the load */
3455 } else {
3456 buf = (unsigned char *)dd->port->log_buf;
3457 if (buf[259] & 0x1) {
3458 dev_info(&dd->pdev->dev,
3459 "Write protect bit is set.\n");
Asai Thambi S P8a857a82012-04-09 08:35:38 +02003460 set_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag);
Asai Thambi S Pf6587212012-04-09 08:35:38 +02003461 }
3462 if (buf[288] == 0xF7) {
3463 dev_info(&dd->pdev->dev,
3464 "Exceeded Tmax, drive in thermal shutdown.\n");
Asai Thambi S P8a857a82012-04-09 08:35:38 +02003465 set_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag);
Asai Thambi S Pf6587212012-04-09 08:35:38 +02003466 }
3467 if (buf[288] == 0xBF) {
3468 dev_info(&dd->pdev->dev,
3469 "Drive indicates rebuild has failed.\n");
3470 /* TODO */
3471 }
3472 }
3473
3474 /* get write protect progess */
3475 memset(&attr242, 0, sizeof(struct smart_attr));
3476 if (mtip_get_smart_attr(dd->port, 242, &attr242))
3477 dev_warn(&dd->pdev->dev,
3478 "Unable to check write protect progress\n");
3479 else
3480 dev_info(&dd->pdev->dev,
Asai Thambi S Pb62868e2012-09-05 22:03:32 +05303481 "Write protect progress: %u%% (%u blocks)\n",
3482 attr242.cur, le32_to_cpu(attr242.data));
Sam Bradshaw88523a62011-08-30 08:34:26 -06003483 return rv;
3484
3485out3:
3486 del_timer_sync(&dd->port->cmd_timer);
3487
3488 /* Disable interrupts on the HBA. */
3489 writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN,
3490 dd->mmio + HOST_CTL);
3491
Asai Thambi S P16c906e52012-12-20 07:46:25 -08003492 /* Release the IRQ. */
3493 irq_set_affinity_hint(dd->pdev->irq, NULL);
Sam Bradshaw88523a62011-08-30 08:34:26 -06003494 devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd);
3495
3496out2:
3497 mtip_deinit_port(dd->port);
3498
3499 /* Free the command/command header memory. */
3500 dmam_free_coherent(&dd->pdev->dev,
Asai Thambi S Pf6587212012-04-09 08:35:38 +02003501 HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4),
Sam Bradshaw88523a62011-08-30 08:34:26 -06003502 dd->port->command_list,
3503 dd->port->command_list_dma);
3504out1:
3505 /* Free the memory allocated for the for structure. */
3506 kfree(dd->port);
3507
3508 return rv;
3509}
3510
3511/*
3512 * Called to deinitialize an interface.
3513 *
3514 * @dd Pointer to the driver data structure.
3515 *
3516 * return value
3517 * 0
3518 */
Jens Axboe63166682011-09-27 21:27:43 -06003519static int mtip_hw_exit(struct driver_data *dd)
Sam Bradshaw88523a62011-08-30 08:34:26 -06003520{
3521 /*
3522 * Send standby immediate (E0h) to the drive so that it
3523 * saves its state.
3524 */
Asai Thambi S P8a857a82012-04-09 08:35:38 +02003525 if (!test_bit(MTIP_DDF_CLEANUP_BIT, &dd->dd_flag)) {
Sam Bradshaw88523a62011-08-30 08:34:26 -06003526
Asai Thambi S P8a857a82012-04-09 08:35:38 +02003527 if (!test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags))
Asai Thambi S P45038362012-04-09 08:35:38 +02003528 if (mtip_standby_immediate(dd->port))
3529 dev_warn(&dd->pdev->dev,
3530 "STANDBY IMMEDIATE failed\n");
Sam Bradshaw88523a62011-08-30 08:34:26 -06003531
3532 /* de-initialize the port. */
3533 mtip_deinit_port(dd->port);
3534
3535 /* Disable interrupts on the HBA. */
3536 writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN,
3537 dd->mmio + HOST_CTL);
3538 }
3539
3540 del_timer_sync(&dd->port->cmd_timer);
3541
Sam Bradshaw88523a62011-08-30 08:34:26 -06003542 /* Release the IRQ. */
Asai Thambi S P16c906e52012-12-20 07:46:25 -08003543 irq_set_affinity_hint(dd->pdev->irq, NULL);
Sam Bradshaw88523a62011-08-30 08:34:26 -06003544 devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd);
3545
3546 /* Free the command/command header memory. */
3547 dmam_free_coherent(&dd->pdev->dev,
Asai Thambi S Pf6587212012-04-09 08:35:38 +02003548 HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4),
Sam Bradshaw88523a62011-08-30 08:34:26 -06003549 dd->port->command_list,
3550 dd->port->command_list_dma);
3551 /* Free the memory allocated for the for structure. */
3552 kfree(dd->port);
3553
3554 return 0;
3555}
3556
3557/*
3558 * Issue a Standby Immediate command to the device.
3559 *
3560 * This function is called by the Block Layer just before the
3561 * system powers off during a shutdown.
3562 *
3563 * @dd Pointer to the driver data structure.
3564 *
3565 * return value
3566 * 0
3567 */
Jens Axboe63166682011-09-27 21:27:43 -06003568static int mtip_hw_shutdown(struct driver_data *dd)
Sam Bradshaw88523a62011-08-30 08:34:26 -06003569{
3570 /*
3571 * Send standby immediate (E0h) to the drive so that it
3572 * saves its state.
3573 */
3574 mtip_standby_immediate(dd->port);
3575
3576 return 0;
3577}
3578
3579/*
3580 * Suspend function
3581 *
3582 * This function is called by the Block Layer just before the
3583 * system hibernates.
3584 *
3585 * @dd Pointer to the driver data structure.
3586 *
3587 * return value
3588 * 0 Suspend was successful
3589 * -EFAULT Suspend was not successful
3590 */
Jens Axboe63166682011-09-27 21:27:43 -06003591static int mtip_hw_suspend(struct driver_data *dd)
Sam Bradshaw88523a62011-08-30 08:34:26 -06003592{
3593 /*
3594 * Send standby immediate (E0h) to the drive
3595 * so that it saves its state.
3596 */
3597 if (mtip_standby_immediate(dd->port) != 0) {
3598 dev_err(&dd->pdev->dev,
3599 "Failed standby-immediate command\n");
3600 return -EFAULT;
3601 }
3602
3603 /* Disable interrupts on the HBA.*/
3604 writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN,
3605 dd->mmio + HOST_CTL);
3606 mtip_deinit_port(dd->port);
3607
3608 return 0;
3609}
3610
3611/*
3612 * Resume function
3613 *
3614 * This function is called by the Block Layer as the
3615 * system resumes.
3616 *
3617 * @dd Pointer to the driver data structure.
3618 *
3619 * return value
3620 * 0 Resume was successful
3621 * -EFAULT Resume was not successful
3622 */
Jens Axboe63166682011-09-27 21:27:43 -06003623static int mtip_hw_resume(struct driver_data *dd)
Sam Bradshaw88523a62011-08-30 08:34:26 -06003624{
3625 /* Perform any needed hardware setup steps */
3626 hba_setup(dd);
3627
3628 /* Reset the HBA */
3629 if (mtip_hba_reset(dd) != 0) {
3630 dev_err(&dd->pdev->dev,
3631 "Unable to reset the HBA\n");
3632 return -EFAULT;
3633 }
3634
3635 /*
3636 * Enable the port, DMA engine, and FIS reception specific
3637 * h/w in controller.
3638 */
3639 mtip_init_port(dd->port);
3640 mtip_start_port(dd->port);
3641
3642 /* Enable interrupts on the HBA.*/
3643 writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN,
3644 dd->mmio + HOST_CTL);
3645
3646 return 0;
3647}
3648
3649/*
Sam Bradshaw88523a62011-08-30 08:34:26 -06003650 * Helper function for reusing disk name
3651 * upon hot insertion.
3652 */
3653static int rssd_disk_name_format(char *prefix,
3654 int index,
3655 char *buf,
3656 int buflen)
3657{
3658 const int base = 'z' - 'a' + 1;
3659 char *begin = buf + strlen(prefix);
3660 char *end = buf + buflen;
3661 char *p;
3662 int unit;
3663
3664 p = end - 1;
3665 *p = '\0';
3666 unit = base;
3667 do {
3668 if (p == begin)
3669 return -EINVAL;
3670 *--p = 'a' + (index % unit);
3671 index = (index / unit) - 1;
3672 } while (index >= 0);
3673
3674 memmove(begin, p, end - p);
3675 memcpy(buf, prefix, strlen(prefix));
3676
3677 return 0;
3678}
3679
3680/*
3681 * Block layer IOCTL handler.
3682 *
3683 * @dev Pointer to the block_device structure.
3684 * @mode ignored
3685 * @cmd IOCTL command passed from the user application.
3686 * @arg Argument passed from the user application.
3687 *
3688 * return value
3689 * 0 IOCTL completed successfully.
3690 * -ENOTTY IOCTL not supported or invalid driver data
3691 * structure pointer.
3692 */
3693static int mtip_block_ioctl(struct block_device *dev,
3694 fmode_t mode,
3695 unsigned cmd,
3696 unsigned long arg)
3697{
3698 struct driver_data *dd = dev->bd_disk->private_data;
3699
3700 if (!capable(CAP_SYS_ADMIN))
3701 return -EACCES;
3702
3703 if (!dd)
3704 return -ENOTTY;
3705
Asai Thambi S P8a857a82012-04-09 08:35:38 +02003706 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)))
Asai Thambi S P45038362012-04-09 08:35:38 +02003707 return -ENOTTY;
3708
Sam Bradshaw88523a62011-08-30 08:34:26 -06003709 switch (cmd) {
3710 case BLKFLSBUF:
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01003711 return -ENOTTY;
Sam Bradshaw88523a62011-08-30 08:34:26 -06003712 default:
Jens Axboeef0f1582011-09-27 21:19:53 -06003713 return mtip_hw_ioctl(dd, cmd, arg);
Sam Bradshaw88523a62011-08-30 08:34:26 -06003714 }
3715}
3716
Jens Axboe16d02c02011-09-27 15:50:01 -06003717#ifdef CONFIG_COMPAT
Sam Bradshaw88523a62011-08-30 08:34:26 -06003718/*
3719 * Block layer compat IOCTL handler.
3720 *
3721 * @dev Pointer to the block_device structure.
3722 * @mode ignored
3723 * @cmd IOCTL command passed from the user application.
3724 * @arg Argument passed from the user application.
3725 *
3726 * return value
3727 * 0 IOCTL completed successfully.
3728 * -ENOTTY IOCTL not supported or invalid driver data
3729 * structure pointer.
3730 */
3731static int mtip_block_compat_ioctl(struct block_device *dev,
3732 fmode_t mode,
3733 unsigned cmd,
3734 unsigned long arg)
3735{
3736 struct driver_data *dd = dev->bd_disk->private_data;
3737
3738 if (!capable(CAP_SYS_ADMIN))
3739 return -EACCES;
3740
3741 if (!dd)
3742 return -ENOTTY;
3743
Asai Thambi S P8a857a82012-04-09 08:35:38 +02003744 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)))
Asai Thambi S P45038362012-04-09 08:35:38 +02003745 return -ENOTTY;
3746
Sam Bradshaw88523a62011-08-30 08:34:26 -06003747 switch (cmd) {
3748 case BLKFLSBUF:
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01003749 return -ENOTTY;
Jens Axboeef0f1582011-09-27 21:19:53 -06003750 case HDIO_DRIVE_TASKFILE: {
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01003751 struct mtip_compat_ide_task_request_s __user *compat_req_task;
Jens Axboeef0f1582011-09-27 21:19:53 -06003752 ide_task_request_t req_task;
3753 int compat_tasksize, outtotal, ret;
3754
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01003755 compat_tasksize =
3756 sizeof(struct mtip_compat_ide_task_request_s);
Jens Axboeef0f1582011-09-27 21:19:53 -06003757
3758 compat_req_task =
3759 (struct mtip_compat_ide_task_request_s __user *) arg;
3760
3761 if (copy_from_user(&req_task, (void __user *) arg,
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01003762 compat_tasksize - (2 * sizeof(compat_long_t))))
Jens Axboeef0f1582011-09-27 21:19:53 -06003763 return -EFAULT;
3764
3765 if (get_user(req_task.out_size, &compat_req_task->out_size))
3766 return -EFAULT;
3767
3768 if (get_user(req_task.in_size, &compat_req_task->in_size))
3769 return -EFAULT;
3770
3771 outtotal = sizeof(struct mtip_compat_ide_task_request_s);
3772
3773 ret = exec_drive_taskfile(dd, (void __user *) arg,
3774 &req_task, outtotal);
3775
3776 if (copy_to_user((void __user *) arg, &req_task,
3777 compat_tasksize -
3778 (2 * sizeof(compat_long_t))))
3779 return -EFAULT;
3780
3781 if (put_user(req_task.out_size, &compat_req_task->out_size))
3782 return -EFAULT;
3783
3784 if (put_user(req_task.in_size, &compat_req_task->in_size))
3785 return -EFAULT;
3786
3787 return ret;
3788 }
Sam Bradshaw88523a62011-08-30 08:34:26 -06003789 default:
Jens Axboeef0f1582011-09-27 21:19:53 -06003790 return mtip_hw_ioctl(dd, cmd, arg);
Sam Bradshaw88523a62011-08-30 08:34:26 -06003791 }
3792}
Jens Axboe16d02c02011-09-27 15:50:01 -06003793#endif
Sam Bradshaw88523a62011-08-30 08:34:26 -06003794
3795/*
3796 * Obtain the geometry of the device.
3797 *
3798 * You may think that this function is obsolete, but some applications,
3799 * fdisk for example still used CHS values. This function describes the
3800 * device as having 224 heads and 56 sectors per cylinder. These values are
3801 * chosen so that each cylinder is aligned on a 4KB boundary. Since a
3802 * partition is described in terms of a start and end cylinder this means
3803 * that each partition is also 4KB aligned. Non-aligned partitions adversely
3804 * affects performance.
3805 *
3806 * @dev Pointer to the block_device strucutre.
3807 * @geo Pointer to a hd_geometry structure.
3808 *
3809 * return value
3810 * 0 Operation completed successfully.
3811 * -ENOTTY An error occurred while reading the drive capacity.
3812 */
3813static int mtip_block_getgeo(struct block_device *dev,
3814 struct hd_geometry *geo)
3815{
3816 struct driver_data *dd = dev->bd_disk->private_data;
3817 sector_t capacity;
3818
3819 if (!dd)
3820 return -ENOTTY;
3821
3822 if (!(mtip_hw_get_capacity(dd, &capacity))) {
3823 dev_warn(&dd->pdev->dev,
3824 "Could not get drive capacity.\n");
3825 return -ENOTTY;
3826 }
3827
3828 geo->heads = 224;
3829 geo->sectors = 56;
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01003830 sector_div(capacity, (geo->heads * geo->sectors));
Sam Bradshaw88523a62011-08-30 08:34:26 -06003831 geo->cylinders = capacity;
Sam Bradshaw88523a62011-08-30 08:34:26 -06003832 return 0;
3833}
3834
3835/*
3836 * Block device operation function.
3837 *
3838 * This structure contains pointers to the functions required by the block
3839 * layer.
3840 */
3841static const struct block_device_operations mtip_block_ops = {
3842 .ioctl = mtip_block_ioctl,
Jens Axboe16d02c02011-09-27 15:50:01 -06003843#ifdef CONFIG_COMPAT
Sam Bradshaw88523a62011-08-30 08:34:26 -06003844 .compat_ioctl = mtip_block_compat_ioctl,
Jens Axboe16d02c02011-09-27 15:50:01 -06003845#endif
Sam Bradshaw88523a62011-08-30 08:34:26 -06003846 .getgeo = mtip_block_getgeo,
3847 .owner = THIS_MODULE
3848};
3849
3850/*
3851 * Block layer make request function.
3852 *
3853 * This function is called by the kernel to process a BIO for
3854 * the P320 device.
3855 *
3856 * @queue Pointer to the request queue. Unused other than to obtain
3857 * the driver data structure.
3858 * @bio Pointer to the BIO.
3859 *
Sam Bradshaw88523a62011-08-30 08:34:26 -06003860 */
Jens Axboea71f4832011-11-05 08:36:21 +01003861static void mtip_make_request(struct request_queue *queue, struct bio *bio)
Sam Bradshaw88523a62011-08-30 08:34:26 -06003862{
3863 struct driver_data *dd = queue->queuedata;
3864 struct scatterlist *sg;
3865 struct bio_vec *bvec;
3866 int nents = 0;
Asai Thambi S P2077d942013-04-29 21:19:49 +02003867 int tag = 0, unaligned = 0;
Sam Bradshaw88523a62011-08-30 08:34:26 -06003868
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02003869 if (unlikely(dd->dd_flag & MTIP_DDF_STOP_IO)) {
3870 if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT,
3871 &dd->dd_flag))) {
3872 bio_endio(bio, -ENXIO);
3873 return;
3874 }
3875 if (unlikely(test_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag))) {
3876 bio_endio(bio, -ENODATA);
3877 return;
3878 }
3879 if (unlikely(test_bit(MTIP_DDF_WRITE_PROTECT_BIT,
3880 &dd->dd_flag) &&
3881 bio_data_dir(bio))) {
3882 bio_endio(bio, -ENODATA);
3883 return;
3884 }
Asai Thambi S P12a166c2012-09-05 22:01:36 +05303885 if (unlikely(test_bit(MTIP_DDF_SEC_LOCK_BIT, &dd->dd_flag))) {
3886 bio_endio(bio, -ENODATA);
3887 return;
3888 }
Asai Thambi S P45038362012-04-09 08:35:38 +02003889 }
3890
Asai Thambi S P15283462013-01-11 14:41:34 +01003891 if (unlikely(bio->bi_rw & REQ_DISCARD)) {
3892 bio_endio(bio, mtip_send_trim(dd, bio->bi_sector,
3893 bio_sectors(bio)));
3894 return;
3895 }
3896
Sam Bradshaw88523a62011-08-30 08:34:26 -06003897 if (unlikely(!bio_has_data(bio))) {
3898 blk_queue_flush(queue, 0);
3899 bio_endio(bio, 0);
Jens Axboea71f4832011-11-05 08:36:21 +01003900 return;
Sam Bradshaw88523a62011-08-30 08:34:26 -06003901 }
3902
Asai Thambi S P2077d942013-04-29 21:19:49 +02003903 if (bio_data_dir(bio) == WRITE && bio_sectors(bio) <= 64 &&
3904 dd->unal_qdepth) {
3905 if (bio->bi_sector % 8 != 0) /* Unaligned on 4k boundaries */
3906 unaligned = 1;
3907 else if (bio_sectors(bio) % 8 != 0) /* Aligned but not 4k/8k */
3908 unaligned = 1;
3909 }
3910
3911 sg = mtip_hw_get_scatterlist(dd, &tag, unaligned);
Sam Bradshaw88523a62011-08-30 08:34:26 -06003912 if (likely(sg != NULL)) {
3913 blk_queue_bounce(queue, &bio);
3914
3915 if (unlikely((bio)->bi_vcnt > MTIP_MAX_SG)) {
3916 dev_warn(&dd->pdev->dev,
Asai Thambi S P45038362012-04-09 08:35:38 +02003917 "Maximum number of SGL entries exceeded\n");
Sam Bradshaw88523a62011-08-30 08:34:26 -06003918 bio_io_error(bio);
Asai Thambi S P2077d942013-04-29 21:19:49 +02003919 mtip_hw_release_scatterlist(dd, tag, unaligned);
Jens Axboea71f4832011-11-05 08:36:21 +01003920 return;
Sam Bradshaw88523a62011-08-30 08:34:26 -06003921 }
3922
3923 /* Create the scatter list for this bio. */
3924 bio_for_each_segment(bvec, bio, nents) {
3925 sg_set_page(&sg[nents],
3926 bvec->bv_page,
3927 bvec->bv_len,
3928 bvec->bv_offset);
3929 }
3930
3931 /* Issue the read/write. */
3932 mtip_hw_submit_io(dd,
3933 bio->bi_sector,
3934 bio_sectors(bio),
3935 nents,
3936 tag,
3937 bio_endio,
3938 bio,
Asai Thambi S P2077d942013-04-29 21:19:49 +02003939 bio_data_dir(bio),
3940 unaligned);
Jens Axboea71f4832011-11-05 08:36:21 +01003941 } else
Sam Bradshaw88523a62011-08-30 08:34:26 -06003942 bio_io_error(bio);
Sam Bradshaw88523a62011-08-30 08:34:26 -06003943}
3944
3945/*
3946 * Block layer initialization function.
3947 *
3948 * This function is called once by the PCI layer for each P320
3949 * device that is connected to the system.
3950 *
3951 * @dd Pointer to the driver data structure.
3952 *
3953 * return value
3954 * 0 on success else an error code.
3955 */
Jens Axboe63166682011-09-27 21:27:43 -06003956static int mtip_block_initialize(struct driver_data *dd)
Sam Bradshaw88523a62011-08-30 08:34:26 -06003957{
Asai Thambi S P62ee8c12012-01-04 22:01:32 +01003958 int rv = 0, wait_for_rebuild = 0;
Sam Bradshaw88523a62011-08-30 08:34:26 -06003959 sector_t capacity;
3960 unsigned int index = 0;
3961 struct kobject *kobj;
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01003962 unsigned char thd_name[16];
Sam Bradshaw88523a62011-08-30 08:34:26 -06003963
Asai Thambi S P62ee8c12012-01-04 22:01:32 +01003964 if (dd->disk)
3965 goto skip_create_disk; /* hw init done, before rebuild */
3966
Sam Bradshaw88523a62011-08-30 08:34:26 -06003967 /* Initialize the protocol layer. */
Asai Thambi S P62ee8c12012-01-04 22:01:32 +01003968 wait_for_rebuild = mtip_hw_init(dd);
3969 if (wait_for_rebuild < 0) {
Sam Bradshaw88523a62011-08-30 08:34:26 -06003970 dev_err(&dd->pdev->dev,
3971 "Protocol layer initialization failed\n");
3972 rv = -EINVAL;
3973 goto protocol_init_error;
3974 }
3975
Asai Thambi S P16c906e52012-12-20 07:46:25 -08003976 dd->disk = alloc_disk_node(MTIP_MAX_MINORS, dd->numa_node);
Sam Bradshaw88523a62011-08-30 08:34:26 -06003977 if (dd->disk == NULL) {
3978 dev_err(&dd->pdev->dev,
3979 "Unable to allocate gendisk structure\n");
3980 rv = -EINVAL;
3981 goto alloc_disk_error;
3982 }
3983
3984 /* Generate the disk name, implemented same as in sd.c */
3985 do {
3986 if (!ida_pre_get(&rssd_index_ida, GFP_KERNEL))
3987 goto ida_get_error;
3988
3989 spin_lock(&rssd_index_lock);
3990 rv = ida_get_new(&rssd_index_ida, &index);
3991 spin_unlock(&rssd_index_lock);
3992 } while (rv == -EAGAIN);
3993
3994 if (rv)
3995 goto ida_get_error;
3996
3997 rv = rssd_disk_name_format("rssd",
3998 index,
3999 dd->disk->disk_name,
4000 DISK_NAME_LEN);
4001 if (rv)
4002 goto disk_index_error;
4003
4004 dd->disk->driverfs_dev = &dd->pdev->dev;
4005 dd->disk->major = dd->major;
4006 dd->disk->first_minor = dd->instance * MTIP_MAX_MINORS;
4007 dd->disk->fops = &mtip_block_ops;
Sam Bradshaw88523a62011-08-30 08:34:26 -06004008 dd->disk->private_data = dd;
Sam Bradshaw88523a62011-08-30 08:34:26 -06004009 dd->index = index;
4010
Asai Thambi S P62ee8c12012-01-04 22:01:32 +01004011 /*
4012 * if rebuild pending, start the service thread, and delay the block
4013 * queue creation and add_disk()
4014 */
4015 if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC)
4016 goto start_service_thread;
4017
4018skip_create_disk:
4019 /* Allocate the request queue. */
Asai Thambi S P16c906e52012-12-20 07:46:25 -08004020 dd->queue = blk_alloc_queue_node(GFP_KERNEL, dd->numa_node);
Asai Thambi S P62ee8c12012-01-04 22:01:32 +01004021 if (dd->queue == NULL) {
4022 dev_err(&dd->pdev->dev,
4023 "Unable to allocate request queue\n");
4024 rv = -ENOMEM;
4025 goto block_queue_alloc_init_error;
4026 }
4027
4028 /* Attach our request function to the request queue. */
4029 blk_queue_make_request(dd->queue, mtip_make_request);
4030
4031 dd->disk->queue = dd->queue;
4032 dd->queue->queuedata = dd;
4033
4034 /* Set device limits. */
4035 set_bit(QUEUE_FLAG_NONROT, &dd->queue->queue_flags);
4036 blk_queue_max_segments(dd->queue, MTIP_MAX_SG);
4037 blk_queue_physical_block_size(dd->queue, 4096);
Asai Thambi S P6c8ab692012-05-29 18:42:51 -07004038 blk_queue_max_hw_sectors(dd->queue, 0xffff);
4039 blk_queue_max_segment_size(dd->queue, 0x400000);
Asai Thambi S P62ee8c12012-01-04 22:01:32 +01004040 blk_queue_io_min(dd->queue, 4096);
Asai Thambi S P6c8ab692012-05-29 18:42:51 -07004041
Asai Thambi S P4e8670e2012-02-07 07:54:31 +01004042 /*
4043 * write back cache is not supported in the device. FUA depends on
4044 * write back cache support, hence setting flush support to zero.
4045 */
Asai Thambi S P62ee8c12012-01-04 22:01:32 +01004046 blk_queue_flush(dd->queue, 0);
4047
Asai Thambi S P15283462013-01-11 14:41:34 +01004048 /* Signal trim support */
4049 if (dd->trim_supp == true) {
4050 set_bit(QUEUE_FLAG_DISCARD, &dd->queue->queue_flags);
4051 dd->queue->limits.discard_granularity = 4096;
4052 blk_queue_max_discard_sectors(dd->queue,
4053 MTIP_MAX_TRIM_ENTRY_LEN * MTIP_MAX_TRIM_ENTRIES);
4054 dd->queue->limits.discard_zeroes_data = 0;
4055 }
4056
Sam Bradshaw88523a62011-08-30 08:34:26 -06004057 /* Set the capacity of the device in 512 byte sectors. */
4058 if (!(mtip_hw_get_capacity(dd, &capacity))) {
4059 dev_warn(&dd->pdev->dev,
4060 "Could not read drive capacity\n");
4061 rv = -EIO;
4062 goto read_capacity_error;
4063 }
4064 set_capacity(dd->disk, capacity);
4065
4066 /* Enable the block device and add it to /dev */
4067 add_disk(dd->disk);
4068
4069 /*
4070 * Now that the disk is active, initialize any sysfs attributes
4071 * managed by the protocol layer.
4072 */
4073 kobj = kobject_get(&disk_to_dev(dd->disk)->kobj);
4074 if (kobj) {
4075 mtip_hw_sysfs_init(dd, kobj);
4076 kobject_put(kobj);
4077 }
Asai Thambi S P7b421d22012-06-04 12:44:02 -07004078 mtip_hw_debugfs_init(dd);
Sam Bradshaw88523a62011-08-30 08:34:26 -06004079
Asai Thambi S P45038362012-04-09 08:35:38 +02004080 if (dd->mtip_svc_handler) {
Asai Thambi S P8a857a82012-04-09 08:35:38 +02004081 set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag);
Asai Thambi S P62ee8c12012-01-04 22:01:32 +01004082 return rv; /* service thread created for handling rebuild */
Asai Thambi S P45038362012-04-09 08:35:38 +02004083 }
Asai Thambi S P62ee8c12012-01-04 22:01:32 +01004084
4085start_service_thread:
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01004086 sprintf(thd_name, "mtip_svc_thd_%02d", index);
Asai Thambi S P16c906e52012-12-20 07:46:25 -08004087 dd->mtip_svc_handler = kthread_create_on_node(mtip_service_thread,
4088 dd, dd->numa_node, thd_name);
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01004089
4090 if (IS_ERR(dd->mtip_svc_handler)) {
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02004091 dev_err(&dd->pdev->dev, "service thread failed to start\n");
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01004092 dd->mtip_svc_handler = NULL;
4093 rv = -EFAULT;
Asai Thambi S P62ee8c12012-01-04 22:01:32 +01004094 goto kthread_run_error;
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01004095 }
Asai Thambi S P16c906e52012-12-20 07:46:25 -08004096 wake_up_process(dd->mtip_svc_handler);
Asai Thambi S P45038362012-04-09 08:35:38 +02004097 if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC)
4098 rv = wait_for_rebuild;
4099
Sam Bradshaw88523a62011-08-30 08:34:26 -06004100 return rv;
4101
Asai Thambi S P62ee8c12012-01-04 22:01:32 +01004102kthread_run_error:
Asai Thambi S P7b421d22012-06-04 12:44:02 -07004103 mtip_hw_debugfs_exit(dd);
4104
Asai Thambi S P62ee8c12012-01-04 22:01:32 +01004105 /* Delete our gendisk. This also removes the device from /dev */
Sam Bradshaw88523a62011-08-30 08:34:26 -06004106 del_gendisk(dd->disk);
4107
Asai Thambi S P62ee8c12012-01-04 22:01:32 +01004108read_capacity_error:
4109 blk_cleanup_queue(dd->queue);
4110
4111block_queue_alloc_init_error:
Sam Bradshaw88523a62011-08-30 08:34:26 -06004112disk_index_error:
4113 spin_lock(&rssd_index_lock);
4114 ida_remove(&rssd_index_ida, index);
4115 spin_unlock(&rssd_index_lock);
4116
4117ida_get_error:
4118 put_disk(dd->disk);
4119
4120alloc_disk_error:
Asai Thambi S P62ee8c12012-01-04 22:01:32 +01004121 mtip_hw_exit(dd); /* De-initialize the protocol layer. */
Sam Bradshaw88523a62011-08-30 08:34:26 -06004122
4123protocol_init_error:
4124 return rv;
4125}
4126
4127/*
4128 * Block layer deinitialization function.
4129 *
4130 * Called by the PCI layer as each P320 device is removed.
4131 *
4132 * @dd Pointer to the driver data structure.
4133 *
4134 * return value
4135 * 0
4136 */
Jens Axboe63166682011-09-27 21:27:43 -06004137static int mtip_block_remove(struct driver_data *dd)
Sam Bradshaw88523a62011-08-30 08:34:26 -06004138{
4139 struct kobject *kobj;
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01004140
4141 if (dd->mtip_svc_handler) {
Asai Thambi S Pc74b0f52012-04-09 08:35:39 +02004142 set_bit(MTIP_PF_SVC_THD_STOP_BIT, &dd->port->flags);
Asai Thambi S P60ec0ee2011-11-23 08:29:24 +01004143 wake_up_interruptible(&dd->port->svc_wait);
4144 kthread_stop(dd->mtip_svc_handler);
4145 }
4146
Asai Thambi S Pf6587212012-04-09 08:35:38 +02004147 /* Clean up the sysfs attributes, if created */
Asai Thambi S P8a857a82012-04-09 08:35:38 +02004148 if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag)) {
Asai Thambi S P45038362012-04-09 08:35:38 +02004149 kobj = kobject_get(&disk_to_dev(dd->disk)->kobj);
4150 if (kobj) {
4151 mtip_hw_sysfs_exit(dd, kobj);
4152 kobject_put(kobj);
4153 }
Sam Bradshaw88523a62011-08-30 08:34:26 -06004154 }
Asai Thambi S P7b421d22012-06-04 12:44:02 -07004155 mtip_hw_debugfs_exit(dd);
Sam Bradshaw88523a62011-08-30 08:34:26 -06004156
4157 /*
4158 * Delete our gendisk structure. This also removes the device
4159 * from /dev
4160 */
Asai Thambi S P58c49df2013-01-11 18:47:12 +05304161 if (dd->disk) {
4162 if (dd->disk->queue)
4163 del_gendisk(dd->disk);
4164 else
4165 put_disk(dd->disk);
4166 }
Asai Thambi S P8182b492012-04-09 08:35:38 +02004167
4168 spin_lock(&rssd_index_lock);
4169 ida_remove(&rssd_index_ida, dd->index);
4170 spin_unlock(&rssd_index_lock);
4171
Sam Bradshaw88523a62011-08-30 08:34:26 -06004172 blk_cleanup_queue(dd->queue);
4173 dd->disk = NULL;
4174 dd->queue = NULL;
4175
4176 /* De-initialize the protocol layer. */
4177 mtip_hw_exit(dd);
4178
4179 return 0;
4180}
4181
4182/*
4183 * Function called by the PCI layer when just before the
4184 * machine shuts down.
4185 *
4186 * If a protocol layer shutdown function is present it will be called
4187 * by this function.
4188 *
4189 * @dd Pointer to the driver data structure.
4190 *
4191 * return value
4192 * 0
4193 */
Jens Axboe63166682011-09-27 21:27:43 -06004194static int mtip_block_shutdown(struct driver_data *dd)
Sam Bradshaw88523a62011-08-30 08:34:26 -06004195{
Sam Bradshaw88523a62011-08-30 08:34:26 -06004196 /* Delete our gendisk structure, and cleanup the blk queue. */
Asai Thambi S P58c49df2013-01-11 18:47:12 +05304197 if (dd->disk) {
Asai Thambi S P5a79e1a2013-04-12 23:57:17 +05304198 dev_info(&dd->pdev->dev,
4199 "Shutting down %s ...\n", dd->disk->disk_name);
Asai Thambi S P58c49df2013-01-11 18:47:12 +05304200
Asai Thambi S P5a79e1a2013-04-12 23:57:17 +05304201 if (dd->disk->queue) {
4202 del_gendisk(dd->disk);
4203 blk_cleanup_queue(dd->queue);
4204 } else
4205 put_disk(dd->disk);
4206 dd->disk = NULL;
4207 dd->queue = NULL;
4208 }
Asai Thambi S P8182b492012-04-09 08:35:38 +02004209
4210 spin_lock(&rssd_index_lock);
4211 ida_remove(&rssd_index_ida, dd->index);
4212 spin_unlock(&rssd_index_lock);
4213
Sam Bradshaw88523a62011-08-30 08:34:26 -06004214 mtip_hw_shutdown(dd);
4215 return 0;
4216}
4217
Jens Axboe63166682011-09-27 21:27:43 -06004218static int mtip_block_suspend(struct driver_data *dd)
Sam Bradshaw88523a62011-08-30 08:34:26 -06004219{
4220 dev_info(&dd->pdev->dev,
4221 "Suspending %s ...\n", dd->disk->disk_name);
4222 mtip_hw_suspend(dd);
4223 return 0;
4224}
4225
Jens Axboe63166682011-09-27 21:27:43 -06004226static int mtip_block_resume(struct driver_data *dd)
Sam Bradshaw88523a62011-08-30 08:34:26 -06004227{
4228 dev_info(&dd->pdev->dev, "Resuming %s ...\n",
4229 dd->disk->disk_name);
4230 mtip_hw_resume(dd);
4231 return 0;
4232}
4233
Asai Thambi S P16c906e52012-12-20 07:46:25 -08004234static void drop_cpu(int cpu)
4235{
4236 cpu_use[cpu]--;
4237}
4238
4239static int get_least_used_cpu_on_node(int node)
4240{
4241 int cpu, least_used_cpu, least_cnt;
4242 const struct cpumask *node_mask;
4243
4244 node_mask = cpumask_of_node(node);
4245 least_used_cpu = cpumask_first(node_mask);
4246 least_cnt = cpu_use[least_used_cpu];
4247 cpu = least_used_cpu;
4248
4249 for_each_cpu(cpu, node_mask) {
4250 if (cpu_use[cpu] < least_cnt) {
4251 least_used_cpu = cpu;
4252 least_cnt = cpu_use[cpu];
4253 }
4254 }
4255 cpu_use[least_used_cpu]++;
4256 return least_used_cpu;
4257}
4258
4259/* Helper for selecting a node in round robin mode */
4260static inline int mtip_get_next_rr_node(void)
4261{
4262 static int next_node = -1;
4263
4264 if (next_node == -1) {
4265 next_node = first_online_node;
4266 return next_node;
4267 }
4268
4269 next_node = next_online_node(next_node);
4270 if (next_node == MAX_NUMNODES)
4271 next_node = first_online_node;
4272 return next_node;
4273}
4274
Fengguang Wu25bac122013-01-12 15:31:40 +08004275static DEFINE_HANDLER(0);
4276static DEFINE_HANDLER(1);
4277static DEFINE_HANDLER(2);
4278static DEFINE_HANDLER(3);
4279static DEFINE_HANDLER(4);
4280static DEFINE_HANDLER(5);
4281static DEFINE_HANDLER(6);
4282static DEFINE_HANDLER(7);
Asai Thambi S P16c906e52012-12-20 07:46:25 -08004283
Sam Bradshaw88523a62011-08-30 08:34:26 -06004284/*
4285 * Called for each supported PCI device detected.
4286 *
4287 * This function allocates the private data structure, enables the
4288 * PCI device and then calls the block layer initialization function.
4289 *
4290 * return value
4291 * 0 on success else an error code.
4292 */
4293static int mtip_pci_probe(struct pci_dev *pdev,
4294 const struct pci_device_id *ent)
4295{
4296 int rv = 0;
4297 struct driver_data *dd = NULL;
Asai Thambi S P16c906e52012-12-20 07:46:25 -08004298 char cpu_list[256];
4299 const struct cpumask *node_mask;
4300 int cpu, i = 0, j = 0;
4301 int my_node = NUMA_NO_NODE;
Asai Thambi S P0caff002013-04-03 19:56:21 +05304302 unsigned long flags;
Sam Bradshaw88523a62011-08-30 08:34:26 -06004303
4304 /* Allocate memory for this devices private data. */
Asai Thambi S P16c906e52012-12-20 07:46:25 -08004305 my_node = pcibus_to_node(pdev->bus);
4306 if (my_node != NUMA_NO_NODE) {
4307 if (!node_online(my_node))
4308 my_node = mtip_get_next_rr_node();
4309 } else {
4310 dev_info(&pdev->dev, "Kernel not reporting proximity, choosing a node\n");
4311 my_node = mtip_get_next_rr_node();
4312 }
4313 dev_info(&pdev->dev, "NUMA node %d (closest: %d,%d, probe on %d:%d)\n",
4314 my_node, pcibus_to_node(pdev->bus), dev_to_node(&pdev->dev),
4315 cpu_to_node(smp_processor_id()), smp_processor_id());
4316
4317 dd = kzalloc_node(sizeof(struct driver_data), GFP_KERNEL, my_node);
Sam Bradshaw88523a62011-08-30 08:34:26 -06004318 if (dd == NULL) {
4319 dev_err(&pdev->dev,
4320 "Unable to allocate memory for driver data\n");
4321 return -ENOMEM;
4322 }
4323
Sam Bradshaw88523a62011-08-30 08:34:26 -06004324 /* Attach the private data to this PCI device. */
4325 pci_set_drvdata(pdev, dd);
4326
4327 rv = pcim_enable_device(pdev);
4328 if (rv < 0) {
4329 dev_err(&pdev->dev, "Unable to enable device\n");
4330 goto iomap_err;
4331 }
4332
4333 /* Map BAR5 to memory. */
4334 rv = pcim_iomap_regions(pdev, 1 << MTIP_ABAR, MTIP_DRV_NAME);
4335 if (rv < 0) {
4336 dev_err(&pdev->dev, "Unable to map regions\n");
4337 goto iomap_err;
4338 }
4339
4340 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
4341 rv = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
4342
4343 if (rv) {
4344 rv = pci_set_consistent_dma_mask(pdev,
4345 DMA_BIT_MASK(32));
4346 if (rv) {
4347 dev_warn(&pdev->dev,
4348 "64-bit DMA enable failed\n");
4349 goto setmask_err;
4350 }
4351 }
4352 }
4353
Asai Thambi S P16c906e52012-12-20 07:46:25 -08004354 /* Copy the info we may need later into the private data structure. */
4355 dd->major = mtip_major;
4356 dd->instance = instance;
4357 dd->pdev = pdev;
4358 dd->numa_node = my_node;
Sam Bradshaw88523a62011-08-30 08:34:26 -06004359
Asai Thambi S P0caff002013-04-03 19:56:21 +05304360 INIT_LIST_HEAD(&dd->online_list);
4361 INIT_LIST_HEAD(&dd->remove_list);
4362
Asai Thambi S P16c906e52012-12-20 07:46:25 -08004363 memset(dd->workq_name, 0, 32);
4364 snprintf(dd->workq_name, 31, "mtipq%d", dd->instance);
4365
4366 dd->isr_workq = create_workqueue(dd->workq_name);
4367 if (!dd->isr_workq) {
4368 dev_warn(&pdev->dev, "Can't create wq %d\n", dd->instance);
Wei Yongjund137c832013-03-22 08:58:23 -06004369 rv = -ENOMEM;
Asai Thambi S P16c906e52012-12-20 07:46:25 -08004370 goto block_initialize_err;
4371 }
4372
4373 memset(cpu_list, 0, sizeof(cpu_list));
4374
4375 node_mask = cpumask_of_node(dd->numa_node);
4376 if (!cpumask_empty(node_mask)) {
4377 for_each_cpu(cpu, node_mask)
4378 {
4379 snprintf(&cpu_list[j], 256 - j, "%d ", cpu);
4380 j = strlen(cpu_list);
4381 }
4382
4383 dev_info(&pdev->dev, "Node %d on package %d has %d cpu(s): %s\n",
4384 dd->numa_node,
4385 topology_physical_package_id(cpumask_first(node_mask)),
4386 nr_cpus_node(dd->numa_node),
4387 cpu_list);
4388 } else
4389 dev_dbg(&pdev->dev, "mtip32xx: node_mask empty\n");
4390
4391 dd->isr_binding = get_least_used_cpu_on_node(dd->numa_node);
4392 dev_info(&pdev->dev, "Initial IRQ binding node:cpu %d:%d\n",
4393 cpu_to_node(dd->isr_binding), dd->isr_binding);
4394
4395 /* first worker context always runs in ISR */
4396 dd->work[0].cpu_binding = dd->isr_binding;
4397 dd->work[1].cpu_binding = get_least_used_cpu_on_node(dd->numa_node);
4398 dd->work[2].cpu_binding = get_least_used_cpu_on_node(dd->numa_node);
4399 dd->work[3].cpu_binding = dd->work[0].cpu_binding;
4400 dd->work[4].cpu_binding = dd->work[1].cpu_binding;
4401 dd->work[5].cpu_binding = dd->work[2].cpu_binding;
4402 dd->work[6].cpu_binding = dd->work[2].cpu_binding;
4403 dd->work[7].cpu_binding = dd->work[1].cpu_binding;
4404
4405 /* Log the bindings */
4406 for_each_present_cpu(cpu) {
4407 memset(cpu_list, 0, sizeof(cpu_list));
4408 for (i = 0, j = 0; i < MTIP_MAX_SLOT_GROUPS; i++) {
4409 if (dd->work[i].cpu_binding == cpu) {
4410 snprintf(&cpu_list[j], 256 - j, "%d ", i);
4411 j = strlen(cpu_list);
4412 }
4413 }
4414 if (j)
4415 dev_info(&pdev->dev, "CPU %d: WQs %s\n", cpu, cpu_list);
4416 }
4417
4418 INIT_WORK(&dd->work[0].work, mtip_workq_sdbf0);
4419 INIT_WORK(&dd->work[1].work, mtip_workq_sdbf1);
4420 INIT_WORK(&dd->work[2].work, mtip_workq_sdbf2);
4421 INIT_WORK(&dd->work[3].work, mtip_workq_sdbf3);
4422 INIT_WORK(&dd->work[4].work, mtip_workq_sdbf4);
4423 INIT_WORK(&dd->work[5].work, mtip_workq_sdbf5);
4424 INIT_WORK(&dd->work[6].work, mtip_workq_sdbf6);
4425 INIT_WORK(&dd->work[7].work, mtip_workq_sdbf7);
4426
4427 pci_set_master(pdev);
Wei Yongjund137c832013-03-22 08:58:23 -06004428 rv = pci_enable_msi(pdev);
4429 if (rv) {
Sam Bradshaw88523a62011-08-30 08:34:26 -06004430 dev_warn(&pdev->dev,
4431 "Unable to enable MSI interrupt.\n");
4432 goto block_initialize_err;
4433 }
4434
Sam Bradshaw88523a62011-08-30 08:34:26 -06004435 /* Initialize the block layer. */
4436 rv = mtip_block_initialize(dd);
4437 if (rv < 0) {
4438 dev_err(&pdev->dev,
4439 "Unable to initialize block layer\n");
4440 goto block_initialize_err;
4441 }
4442
4443 /*
4444 * Increment the instance count so that each device has a unique
4445 * instance number.
4446 */
4447 instance++;
Asai Thambi S P45038362012-04-09 08:35:38 +02004448 if (rv != MTIP_FTL_REBUILD_MAGIC)
Asai Thambi S P8a857a82012-04-09 08:35:38 +02004449 set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag);
Asai Thambi S P6b06d352013-04-03 19:54:35 +05304450 else
4451 rv = 0; /* device in rebuild state, return 0 from probe */
Asai Thambi S P0caff002013-04-03 19:56:21 +05304452
4453 /* Add to online list even if in ftl rebuild */
4454 spin_lock_irqsave(&dev_lock, flags);
4455 list_add(&dd->online_list, &online_list);
4456 spin_unlock_irqrestore(&dev_lock, flags);
4457
Sam Bradshaw88523a62011-08-30 08:34:26 -06004458 goto done;
4459
4460block_initialize_err:
4461 pci_disable_msi(pdev);
Asai Thambi S P16c906e52012-12-20 07:46:25 -08004462 if (dd->isr_workq) {
4463 flush_workqueue(dd->isr_workq);
4464 destroy_workqueue(dd->isr_workq);
4465 drop_cpu(dd->work[0].cpu_binding);
4466 drop_cpu(dd->work[1].cpu_binding);
4467 drop_cpu(dd->work[2].cpu_binding);
4468 }
Sam Bradshaw88523a62011-08-30 08:34:26 -06004469setmask_err:
4470 pcim_iounmap_regions(pdev, 1 << MTIP_ABAR);
4471
4472iomap_err:
4473 kfree(dd);
4474 pci_set_drvdata(pdev, NULL);
4475 return rv;
4476done:
Sam Bradshaw88523a62011-08-30 08:34:26 -06004477 return rv;
4478}
4479
4480/*
4481 * Called for each probed device when the device is removed or the
4482 * driver is unloaded.
4483 *
4484 * return value
4485 * None
4486 */
4487static void mtip_pci_remove(struct pci_dev *pdev)
4488{
4489 struct driver_data *dd = pci_get_drvdata(pdev);
4490 int counter = 0;
Asai Thambi S P0caff002013-04-03 19:56:21 +05304491 unsigned long flags;
Sam Bradshaw88523a62011-08-30 08:34:26 -06004492
Asai Thambi S P8a857a82012-04-09 08:35:38 +02004493 set_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag);
Asai Thambi S P45038362012-04-09 08:35:38 +02004494
Asai Thambi S P0caff002013-04-03 19:56:21 +05304495 spin_lock_irqsave(&dev_lock, flags);
4496 list_del_init(&dd->online_list);
4497 list_add(&dd->remove_list, &removing_list);
4498 spin_unlock_irqrestore(&dev_lock, flags);
4499
Sam Bradshaw88523a62011-08-30 08:34:26 -06004500 if (mtip_check_surprise_removal(pdev)) {
Asai Thambi S P8a857a82012-04-09 08:35:38 +02004501 while (!test_bit(MTIP_DDF_CLEANUP_BIT, &dd->dd_flag)) {
Sam Bradshaw88523a62011-08-30 08:34:26 -06004502 counter++;
4503 msleep(20);
4504 if (counter == 10) {
4505 /* Cleanup the outstanding commands */
4506 mtip_command_cleanup(dd);
4507 break;
4508 }
4509 }
4510 }
Sam Bradshaw88523a62011-08-30 08:34:26 -06004511
4512 /* Clean up the block layer. */
4513 mtip_block_remove(dd);
4514
Asai Thambi S P16c906e52012-12-20 07:46:25 -08004515 if (dd->isr_workq) {
4516 flush_workqueue(dd->isr_workq);
4517 destroy_workqueue(dd->isr_workq);
4518 drop_cpu(dd->work[0].cpu_binding);
4519 drop_cpu(dd->work[1].cpu_binding);
4520 drop_cpu(dd->work[2].cpu_binding);
4521 }
4522
Sam Bradshaw88523a62011-08-30 08:34:26 -06004523 pci_disable_msi(pdev);
4524
Asai Thambi S P0caff002013-04-03 19:56:21 +05304525 spin_lock_irqsave(&dev_lock, flags);
4526 list_del_init(&dd->remove_list);
4527 spin_unlock_irqrestore(&dev_lock, flags);
4528
Sam Bradshaw88523a62011-08-30 08:34:26 -06004529 kfree(dd);
4530 pcim_iounmap_regions(pdev, 1 << MTIP_ABAR);
4531}
4532
4533/*
4534 * Called for each probed device when the device is suspended.
4535 *
4536 * return value
4537 * 0 Success
4538 * <0 Error
4539 */
4540static int mtip_pci_suspend(struct pci_dev *pdev, pm_message_t mesg)
4541{
4542 int rv = 0;
4543 struct driver_data *dd = pci_get_drvdata(pdev);
4544
4545 if (!dd) {
4546 dev_err(&pdev->dev,
4547 "Driver private datastructure is NULL\n");
4548 return -EFAULT;
4549 }
4550
Asai Thambi S P8a857a82012-04-09 08:35:38 +02004551 set_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag);
Sam Bradshaw88523a62011-08-30 08:34:26 -06004552
4553 /* Disable ports & interrupts then send standby immediate */
4554 rv = mtip_block_suspend(dd);
4555 if (rv < 0) {
4556 dev_err(&pdev->dev,
4557 "Failed to suspend controller\n");
4558 return rv;
4559 }
4560
4561 /*
4562 * Save the pci config space to pdev structure &
4563 * disable the device
4564 */
4565 pci_save_state(pdev);
4566 pci_disable_device(pdev);
4567
4568 /* Move to Low power state*/
4569 pci_set_power_state(pdev, PCI_D3hot);
4570
4571 return rv;
4572}
4573
4574/*
4575 * Called for each probed device when the device is resumed.
4576 *
4577 * return value
4578 * 0 Success
4579 * <0 Error
4580 */
4581static int mtip_pci_resume(struct pci_dev *pdev)
4582{
4583 int rv = 0;
4584 struct driver_data *dd;
4585
4586 dd = pci_get_drvdata(pdev);
4587 if (!dd) {
4588 dev_err(&pdev->dev,
4589 "Driver private datastructure is NULL\n");
4590 return -EFAULT;
4591 }
4592
4593 /* Move the device to active State */
4594 pci_set_power_state(pdev, PCI_D0);
4595
4596 /* Restore PCI configuration space */
4597 pci_restore_state(pdev);
4598
4599 /* Enable the PCI device*/
4600 rv = pcim_enable_device(pdev);
4601 if (rv < 0) {
4602 dev_err(&pdev->dev,
4603 "Failed to enable card during resume\n");
4604 goto err;
4605 }
4606 pci_set_master(pdev);
4607
4608 /*
4609 * Calls hbaReset, initPort, & startPort function
4610 * then enables interrupts
4611 */
4612 rv = mtip_block_resume(dd);
4613 if (rv < 0)
4614 dev_err(&pdev->dev, "Unable to resume\n");
4615
4616err:
Asai Thambi S P8a857a82012-04-09 08:35:38 +02004617 clear_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag);
Sam Bradshaw88523a62011-08-30 08:34:26 -06004618
4619 return rv;
4620}
4621
4622/*
4623 * Shutdown routine
4624 *
4625 * return value
4626 * None
4627 */
4628static void mtip_pci_shutdown(struct pci_dev *pdev)
4629{
4630 struct driver_data *dd = pci_get_drvdata(pdev);
4631 if (dd)
4632 mtip_block_shutdown(dd);
4633}
4634
Sam Bradshaw88523a62011-08-30 08:34:26 -06004635/* Table of device ids supported by this driver. */
4636static DEFINE_PCI_DEVICE_TABLE(mtip_pci_tbl) = {
Asai Thambi S P1a131452012-09-05 22:00:38 +05304637 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320H_DEVICE_ID) },
4638 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320M_DEVICE_ID) },
4639 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320S_DEVICE_ID) },
4640 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P325M_DEVICE_ID) },
4641 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P420H_DEVICE_ID) },
4642 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P420M_DEVICE_ID) },
4643 { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P425M_DEVICE_ID) },
Sam Bradshaw88523a62011-08-30 08:34:26 -06004644 { 0 }
4645};
4646
4647/* Structure that describes the PCI driver functions. */
Jens Axboe3ff147d2011-09-27 21:33:53 -06004648static struct pci_driver mtip_pci_driver = {
Sam Bradshaw88523a62011-08-30 08:34:26 -06004649 .name = MTIP_DRV_NAME,
4650 .id_table = mtip_pci_tbl,
4651 .probe = mtip_pci_probe,
4652 .remove = mtip_pci_remove,
4653 .suspend = mtip_pci_suspend,
4654 .resume = mtip_pci_resume,
4655 .shutdown = mtip_pci_shutdown,
4656};
4657
4658MODULE_DEVICE_TABLE(pci, mtip_pci_tbl);
4659
4660/*
4661 * Module initialization function.
4662 *
4663 * Called once when the module is loaded. This function allocates a major
4664 * block device number to the Cyclone devices and registers the PCI layer
4665 * of the driver.
4666 *
4667 * Return value
4668 * 0 on success else error code.
4669 */
4670static int __init mtip_init(void)
4671{
Ryosuke Saito6d27f092012-04-05 08:09:34 -06004672 int error;
4673
Asai Thambi S P45422e72012-09-05 22:03:56 +05304674 pr_info(MTIP_DRV_NAME " Version " MTIP_DRV_VERSION "\n");
Sam Bradshaw88523a62011-08-30 08:34:26 -06004675
Asai Thambi S P0caff002013-04-03 19:56:21 +05304676 spin_lock_init(&dev_lock);
4677
4678 INIT_LIST_HEAD(&online_list);
4679 INIT_LIST_HEAD(&removing_list);
4680
Sam Bradshaw88523a62011-08-30 08:34:26 -06004681 /* Allocate a major block device number to use with this driver. */
Ryosuke Saito6d27f092012-04-05 08:09:34 -06004682 error = register_blkdev(0, MTIP_DRV_NAME);
4683 if (error <= 0) {
Asai Thambi S P45422e72012-09-05 22:03:56 +05304684 pr_err("Unable to register block device (%d)\n",
Ryosuke Saito6d27f092012-04-05 08:09:34 -06004685 error);
Sam Bradshaw88523a62011-08-30 08:34:26 -06004686 return -EBUSY;
4687 }
Ryosuke Saito6d27f092012-04-05 08:09:34 -06004688 mtip_major = error;
Sam Bradshaw88523a62011-08-30 08:34:26 -06004689
Asai Thambi S P0caff002013-04-03 19:56:21 +05304690 dfs_parent = debugfs_create_dir("rssd", NULL);
4691 if (IS_ERR_OR_NULL(dfs_parent)) {
4692 pr_warn("Error creating debugfs parent\n");
4693 dfs_parent = NULL;
4694 }
4695 if (dfs_parent) {
4696 dfs_device_status = debugfs_create_file("device_status",
4697 S_IRUGO, dfs_parent, NULL,
4698 &mtip_device_status_fops);
4699 if (IS_ERR_OR_NULL(dfs_device_status)) {
4700 pr_err("Error creating device_status node\n");
4701 dfs_device_status = NULL;
Asai Thambi S P7b421d22012-06-04 12:44:02 -07004702 }
4703 }
4704
Sam Bradshaw88523a62011-08-30 08:34:26 -06004705 /* Register our PCI operations. */
Ryosuke Saito6d27f092012-04-05 08:09:34 -06004706 error = pci_register_driver(&mtip_pci_driver);
Asai Thambi S P7b421d22012-06-04 12:44:02 -07004707 if (error) {
4708 debugfs_remove(dfs_parent);
Ryosuke Saito6d27f092012-04-05 08:09:34 -06004709 unregister_blkdev(mtip_major, MTIP_DRV_NAME);
Asai Thambi S P7b421d22012-06-04 12:44:02 -07004710 }
Ryosuke Saito6d27f092012-04-05 08:09:34 -06004711
4712 return error;
Sam Bradshaw88523a62011-08-30 08:34:26 -06004713}
4714
4715/*
4716 * Module de-initialization function.
4717 *
4718 * Called once when the module is unloaded. This function deallocates
4719 * the major block device number allocated by mtip_init() and
4720 * unregisters the PCI layer of the driver.
4721 *
4722 * Return value
4723 * none
4724 */
4725static void __exit mtip_exit(void)
4726{
Asai Thambi S P7b421d22012-06-04 12:44:02 -07004727 debugfs_remove_recursive(dfs_parent);
4728
Sam Bradshaw88523a62011-08-30 08:34:26 -06004729 /* Release the allocated major block device number. */
4730 unregister_blkdev(mtip_major, MTIP_DRV_NAME);
4731
4732 /* Unregister the PCI driver. */
4733 pci_unregister_driver(&mtip_pci_driver);
4734}
4735
4736MODULE_AUTHOR("Micron Technology, Inc");
4737MODULE_DESCRIPTION("Micron RealSSD PCIe Block Driver");
4738MODULE_LICENSE("GPL");
4739MODULE_VERSION(MTIP_DRV_VERSION);
4740
4741module_init(mtip_init);
4742module_exit(mtip_exit);