Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * sx8.c: Driver for Promise SATA SX8 looks-like-I2O hardware |
| 3 | * |
Jeff Garzik | 2d5a2ae | 2005-10-22 00:14:31 -0400 | [diff] [blame] | 4 | * Copyright 2004-2005 Red Hat, Inc. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * Author/maintainer: Jeff Garzik <jgarzik@pobox.com> |
| 7 | * |
| 8 | * This file is subject to the terms and conditions of the GNU General Public |
| 9 | * License. See the file "COPYING" in the main directory of this archive |
| 10 | * for more details. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/pci.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/spinlock.h> |
Jens Axboe | 0585b75 | 2018-10-15 08:53:45 -0600 | [diff] [blame] | 19 | #include <linux/blk-mq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include <linux/interrupt.h> |
| 22 | #include <linux/compiler.h> |
| 23 | #include <linux/workqueue.h> |
| 24 | #include <linux/bitops.h> |
| 25 | #include <linux/delay.h> |
Shraddha Barke | 8182503 | 2015-12-22 14:02:19 +0530 | [diff] [blame] | 26 | #include <linux/ktime.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <linux/hdreg.h> |
Tobias Klauser | a394866 | 2005-06-20 23:49:08 +0200 | [diff] [blame] | 28 | #include <linux/dma-mapping.h> |
Steven Rostedt | 906c3b7 | 2006-01-09 15:59:26 -0800 | [diff] [blame] | 29 | #include <linux/completion.h> |
Ralf Baechle | 1176360 | 2007-10-23 20:42:11 +0200 | [diff] [blame] | 30 | #include <linux/scatterlist.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <asm/io.h> |
Linus Torvalds | 7c0f6ba | 2016-12-24 11:46:01 -0800 | [diff] [blame] | 32 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #if 0 |
| 35 | #define CARM_DEBUG |
| 36 | #define CARM_VERBOSE_DEBUG |
| 37 | #else |
| 38 | #undef CARM_DEBUG |
| 39 | #undef CARM_VERBOSE_DEBUG |
| 40 | #endif |
| 41 | #undef CARM_NDEBUG |
| 42 | |
| 43 | #define DRV_NAME "sx8" |
Jeff Garzik | 2d5a2ae | 2005-10-22 00:14:31 -0400 | [diff] [blame] | 44 | #define DRV_VERSION "1.0" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #define PFX DRV_NAME ": " |
| 46 | |
Jeff Garzik | 2d5a2ae | 2005-10-22 00:14:31 -0400 | [diff] [blame] | 47 | MODULE_AUTHOR("Jeff Garzik"); |
| 48 | MODULE_LICENSE("GPL"); |
| 49 | MODULE_DESCRIPTION("Promise SATA SX8 block driver"); |
| 50 | MODULE_VERSION(DRV_VERSION); |
| 51 | |
| 52 | /* |
| 53 | * SX8 hardware has a single message queue for all ATA ports. |
| 54 | * When this driver was written, the hardware (firmware?) would |
| 55 | * corrupt data eventually, if more than one request was outstanding. |
| 56 | * As one can imagine, having 8 ports bottlenecking on a single |
| 57 | * command hurts performance. |
| 58 | * |
| 59 | * Based on user reports, later versions of the hardware (firmware?) |
| 60 | * seem to be able to survive with more than one command queued. |
| 61 | * |
| 62 | * Therefore, we default to the safe option -- 1 command -- but |
| 63 | * allow the user to increase this. |
| 64 | * |
| 65 | * SX8 should be able to support up to ~60 queued commands (CARM_MAX_REQ), |
| 66 | * but problems seem to occur when you exceed ~30, even on newer hardware. |
| 67 | */ |
| 68 | static int max_queue = 1; |
| 69 | module_param(max_queue, int, 0444); |
| 70 | MODULE_PARM_DESC(max_queue, "Maximum number of queued commands. (min==1, max==30, safe==1)"); |
| 71 | |
| 72 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | #define NEXT_RESP(idx) ((idx + 1) % RMSG_Q_LEN) |
| 74 | |
| 75 | /* 0xf is just arbitrary, non-zero noise; this is sorta like poisoning */ |
| 76 | #define TAG_ENCODE(tag) (((tag) << 16) | 0xf) |
| 77 | #define TAG_DECODE(tag) (((tag) >> 16) & 0x1f) |
| 78 | #define TAG_VALID(tag) ((((tag) & 0xf) == 0xf) && (TAG_DECODE(tag) < 32)) |
| 79 | |
| 80 | /* note: prints function name for you */ |
| 81 | #ifdef CARM_DEBUG |
Harvey Harrison | cece933 | 2008-04-21 09:51:04 +0200 | [diff] [blame] | 82 | #define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | #ifdef CARM_VERBOSE_DEBUG |
Harvey Harrison | cece933 | 2008-04-21 09:51:04 +0200 | [diff] [blame] | 84 | #define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | #else |
| 86 | #define VPRINTK(fmt, args...) |
| 87 | #endif /* CARM_VERBOSE_DEBUG */ |
| 88 | #else |
| 89 | #define DPRINTK(fmt, args...) |
| 90 | #define VPRINTK(fmt, args...) |
| 91 | #endif /* CARM_DEBUG */ |
| 92 | |
| 93 | #ifdef CARM_NDEBUG |
| 94 | #define assert(expr) |
| 95 | #else |
| 96 | #define assert(expr) \ |
| 97 | if(unlikely(!(expr))) { \ |
| 98 | printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \ |
Harvey Harrison | cece933 | 2008-04-21 09:51:04 +0200 | [diff] [blame] | 99 | #expr, __FILE__, __func__, __LINE__); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | } |
| 101 | #endif |
| 102 | |
| 103 | /* defines only for the constants which don't work well as enums */ |
| 104 | struct carm_host; |
| 105 | |
| 106 | enum { |
| 107 | /* adapter-wide limits */ |
| 108 | CARM_MAX_PORTS = 8, |
| 109 | CARM_SHM_SIZE = (4096 << 7), |
| 110 | CARM_MINORS_PER_MAJOR = 256 / CARM_MAX_PORTS, |
| 111 | CARM_MAX_WAIT_Q = CARM_MAX_PORTS + 1, |
| 112 | |
| 113 | /* command message queue limits */ |
| 114 | CARM_MAX_REQ = 64, /* max command msgs per host */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | CARM_MSG_LOW_WATER = (CARM_MAX_REQ / 4), /* refill mark */ |
| 116 | |
| 117 | /* S/G limits, host-wide and per-request */ |
| 118 | CARM_MAX_REQ_SG = 32, /* max s/g entries per request */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | CARM_MAX_HOST_SG = 600, /* max s/g entries per host */ |
| 120 | CARM_SG_LOW_WATER = (CARM_MAX_HOST_SG / 4), /* re-fill mark */ |
| 121 | |
| 122 | /* hardware registers */ |
| 123 | CARM_IHQP = 0x1c, |
| 124 | CARM_INT_STAT = 0x10, /* interrupt status */ |
| 125 | CARM_INT_MASK = 0x14, /* interrupt mask */ |
| 126 | CARM_HMUC = 0x18, /* host message unit control */ |
| 127 | RBUF_ADDR_LO = 0x20, /* response msg DMA buf low 32 bits */ |
| 128 | RBUF_ADDR_HI = 0x24, /* response msg DMA buf high 32 bits */ |
| 129 | RBUF_BYTE_SZ = 0x28, |
| 130 | CARM_RESP_IDX = 0x2c, |
| 131 | CARM_CMS0 = 0x30, /* command message size reg 0 */ |
| 132 | CARM_LMUC = 0x48, |
| 133 | CARM_HMPHA = 0x6c, |
| 134 | CARM_INITC = 0xb5, |
| 135 | |
| 136 | /* bits in CARM_INT_{STAT,MASK} */ |
| 137 | INT_RESERVED = 0xfffffff0, |
| 138 | INT_WATCHDOG = (1 << 3), /* watchdog timer */ |
| 139 | INT_Q_OVERFLOW = (1 << 2), /* cmd msg q overflow */ |
| 140 | INT_Q_AVAILABLE = (1 << 1), /* cmd msg q has free space */ |
| 141 | INT_RESPONSE = (1 << 0), /* response msg available */ |
| 142 | INT_ACK_MASK = INT_WATCHDOG | INT_Q_OVERFLOW, |
| 143 | INT_DEF_MASK = INT_RESERVED | INT_Q_OVERFLOW | |
| 144 | INT_RESPONSE, |
| 145 | |
| 146 | /* command messages, and related register bits */ |
| 147 | CARM_HAVE_RESP = 0x01, |
| 148 | CARM_MSG_READ = 1, |
| 149 | CARM_MSG_WRITE = 2, |
| 150 | CARM_MSG_VERIFY = 3, |
| 151 | CARM_MSG_GET_CAPACITY = 4, |
| 152 | CARM_MSG_FLUSH = 5, |
| 153 | CARM_MSG_IOCTL = 6, |
| 154 | CARM_MSG_ARRAY = 8, |
| 155 | CARM_MSG_MISC = 9, |
| 156 | CARM_CME = (1 << 2), |
| 157 | CARM_RME = (1 << 1), |
| 158 | CARM_WZBC = (1 << 0), |
| 159 | CARM_RMI = (1 << 0), |
| 160 | CARM_Q_FULL = (1 << 3), |
| 161 | CARM_MSG_SIZE = 288, |
| 162 | CARM_Q_LEN = 48, |
| 163 | |
| 164 | /* CARM_MSG_IOCTL messages */ |
| 165 | CARM_IOC_SCAN_CHAN = 5, /* scan channels for devices */ |
| 166 | CARM_IOC_GET_TCQ = 13, /* get tcq/ncq depth */ |
| 167 | CARM_IOC_SET_TCQ = 14, /* set tcq/ncq depth */ |
| 168 | |
| 169 | IOC_SCAN_CHAN_NODEV = 0x1f, |
| 170 | IOC_SCAN_CHAN_OFFSET = 0x40, |
| 171 | |
| 172 | /* CARM_MSG_ARRAY messages */ |
| 173 | CARM_ARRAY_INFO = 0, |
| 174 | |
| 175 | ARRAY_NO_EXIST = (1 << 31), |
| 176 | |
| 177 | /* response messages */ |
| 178 | RMSG_SZ = 8, /* sizeof(struct carm_response) */ |
| 179 | RMSG_Q_LEN = 48, /* resp. msg list length */ |
| 180 | RMSG_OK = 1, /* bit indicating msg was successful */ |
| 181 | /* length of entire resp. msg buffer */ |
| 182 | RBUF_LEN = RMSG_SZ * RMSG_Q_LEN, |
| 183 | |
| 184 | PDC_SHM_SIZE = (4096 << 7), /* length of entire h/w buffer */ |
| 185 | |
| 186 | /* CARM_MSG_MISC messages */ |
| 187 | MISC_GET_FW_VER = 2, |
| 188 | MISC_ALLOC_MEM = 3, |
| 189 | MISC_SET_TIME = 5, |
| 190 | |
| 191 | /* MISC_GET_FW_VER feature bits */ |
| 192 | FW_VER_4PORT = (1 << 2), /* 1=4 ports, 0=8 ports */ |
| 193 | FW_VER_NON_RAID = (1 << 1), /* 1=non-RAID firmware, 0=RAID */ |
| 194 | FW_VER_ZCR = (1 << 0), /* zero channel RAID (whatever that is) */ |
| 195 | |
| 196 | /* carm_host flags */ |
| 197 | FL_NON_RAID = FW_VER_NON_RAID, |
| 198 | FL_4PORT = FW_VER_4PORT, |
| 199 | FL_FW_VER_MASK = (FW_VER_NON_RAID | FW_VER_4PORT), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | FL_DYN_MAJOR = (1 << 17), |
| 201 | }; |
| 202 | |
Jeff Garzik | 2d5a2ae | 2005-10-22 00:14:31 -0400 | [diff] [blame] | 203 | enum { |
| 204 | CARM_SG_BOUNDARY = 0xffffUL, /* s/g segment boundary */ |
| 205 | }; |
| 206 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | enum scatter_gather_types { |
| 208 | SGT_32BIT = 0, |
| 209 | SGT_64BIT = 1, |
| 210 | }; |
| 211 | |
| 212 | enum host_states { |
| 213 | HST_INVALID, /* invalid state; never used */ |
| 214 | HST_ALLOC_BUF, /* setting up master SHM area */ |
| 215 | HST_ERROR, /* we never leave here */ |
| 216 | HST_PORT_SCAN, /* start dev scan */ |
| 217 | HST_DEV_SCAN_START, /* start per-device probe */ |
| 218 | HST_DEV_SCAN, /* continue per-device probe */ |
| 219 | HST_DEV_ACTIVATE, /* activate devices we found */ |
| 220 | HST_PROBE_FINISHED, /* probe is complete */ |
| 221 | HST_PROBE_START, /* initiate probe */ |
| 222 | HST_SYNC_TIME, /* tell firmware what time it is */ |
| 223 | HST_GET_FW_VER, /* get firmware version, adapter port cnt */ |
| 224 | }; |
| 225 | |
| 226 | #ifdef CARM_DEBUG |
| 227 | static const char *state_name[] = { |
| 228 | "HST_INVALID", |
| 229 | "HST_ALLOC_BUF", |
| 230 | "HST_ERROR", |
| 231 | "HST_PORT_SCAN", |
| 232 | "HST_DEV_SCAN_START", |
| 233 | "HST_DEV_SCAN", |
| 234 | "HST_DEV_ACTIVATE", |
| 235 | "HST_PROBE_FINISHED", |
| 236 | "HST_PROBE_START", |
| 237 | "HST_SYNC_TIME", |
| 238 | "HST_GET_FW_VER", |
| 239 | }; |
| 240 | #endif |
| 241 | |
| 242 | struct carm_port { |
| 243 | unsigned int port_no; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | struct gendisk *disk; |
| 245 | struct carm_host *host; |
| 246 | |
| 247 | /* attached device characteristics */ |
| 248 | u64 capacity; |
| 249 | char name[41]; |
| 250 | u16 dev_geom_head; |
| 251 | u16 dev_geom_sect; |
| 252 | u16 dev_geom_cyl; |
| 253 | }; |
| 254 | |
| 255 | struct carm_request { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | int n_elem; |
| 257 | unsigned int msg_type; |
| 258 | unsigned int msg_subtype; |
| 259 | unsigned int msg_bucket; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | struct scatterlist sg[CARM_MAX_REQ_SG]; |
| 261 | }; |
| 262 | |
| 263 | struct carm_host { |
| 264 | unsigned long flags; |
| 265 | void __iomem *mmio; |
| 266 | void *shm; |
| 267 | dma_addr_t shm_dma; |
| 268 | |
| 269 | int major; |
| 270 | int id; |
| 271 | char name[32]; |
| 272 | |
| 273 | spinlock_t lock; |
| 274 | struct pci_dev *pdev; |
| 275 | unsigned int state; |
| 276 | u32 fw_ver; |
| 277 | |
Jens Axboe | 0585b75 | 2018-10-15 08:53:45 -0600 | [diff] [blame] | 278 | struct blk_mq_tag_set tag_set; |
Jens Axboe | 165125e | 2007-07-24 09:28:11 +0200 | [diff] [blame] | 279 | struct request_queue *oob_q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | unsigned int n_oob; |
| 281 | |
| 282 | unsigned int hw_sg_used; |
| 283 | |
| 284 | unsigned int resp_idx; |
| 285 | |
| 286 | unsigned int wait_q_prod; |
| 287 | unsigned int wait_q_cons; |
Jens Axboe | 165125e | 2007-07-24 09:28:11 +0200 | [diff] [blame] | 288 | struct request_queue *wait_q[CARM_MAX_WAIT_Q]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | void *msg_base; |
| 291 | dma_addr_t msg_dma; |
| 292 | |
| 293 | int cur_scan_dev; |
| 294 | unsigned long dev_active; |
| 295 | unsigned long dev_present; |
| 296 | struct carm_port port[CARM_MAX_PORTS]; |
| 297 | |
| 298 | struct work_struct fsm_task; |
| 299 | |
Steven Rostedt | 906c3b7 | 2006-01-09 15:59:26 -0800 | [diff] [blame] | 300 | struct completion probe_comp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | }; |
| 302 | |
| 303 | struct carm_response { |
| 304 | __le32 ret_handle; |
| 305 | __le32 status; |
| 306 | } __attribute__((packed)); |
| 307 | |
| 308 | struct carm_msg_sg { |
| 309 | __le32 start; |
| 310 | __le32 len; |
| 311 | } __attribute__((packed)); |
| 312 | |
| 313 | struct carm_msg_rw { |
| 314 | u8 type; |
| 315 | u8 id; |
| 316 | u8 sg_count; |
| 317 | u8 sg_type; |
| 318 | __le32 handle; |
| 319 | __le32 lba; |
| 320 | __le16 lba_count; |
| 321 | __le16 lba_high; |
| 322 | struct carm_msg_sg sg[32]; |
| 323 | } __attribute__((packed)); |
| 324 | |
| 325 | struct carm_msg_allocbuf { |
| 326 | u8 type; |
| 327 | u8 subtype; |
| 328 | u8 n_sg; |
| 329 | u8 sg_type; |
| 330 | __le32 handle; |
| 331 | __le32 addr; |
| 332 | __le32 len; |
| 333 | __le32 evt_pool; |
| 334 | __le32 n_evt; |
| 335 | __le32 rbuf_pool; |
| 336 | __le32 n_rbuf; |
| 337 | __le32 msg_pool; |
| 338 | __le32 n_msg; |
| 339 | struct carm_msg_sg sg[8]; |
| 340 | } __attribute__((packed)); |
| 341 | |
| 342 | struct carm_msg_ioctl { |
| 343 | u8 type; |
| 344 | u8 subtype; |
| 345 | u8 array_id; |
| 346 | u8 reserved1; |
| 347 | __le32 handle; |
| 348 | __le32 data_addr; |
| 349 | u32 reserved2; |
| 350 | } __attribute__((packed)); |
| 351 | |
| 352 | struct carm_msg_sync_time { |
| 353 | u8 type; |
| 354 | u8 subtype; |
| 355 | u16 reserved1; |
| 356 | __le32 handle; |
| 357 | u32 reserved2; |
| 358 | __le32 timestamp; |
| 359 | } __attribute__((packed)); |
| 360 | |
| 361 | struct carm_msg_get_fw_ver { |
| 362 | u8 type; |
| 363 | u8 subtype; |
| 364 | u16 reserved1; |
| 365 | __le32 handle; |
| 366 | __le32 data_addr; |
| 367 | u32 reserved2; |
| 368 | } __attribute__((packed)); |
| 369 | |
| 370 | struct carm_fw_ver { |
| 371 | __le32 version; |
| 372 | u8 features; |
| 373 | u8 reserved1; |
| 374 | u16 reserved2; |
| 375 | } __attribute__((packed)); |
| 376 | |
| 377 | struct carm_array_info { |
| 378 | __le32 size; |
| 379 | |
| 380 | __le16 size_hi; |
| 381 | __le16 stripe_size; |
| 382 | |
| 383 | __le32 mode; |
| 384 | |
| 385 | __le16 stripe_blk_sz; |
| 386 | __le16 reserved1; |
| 387 | |
| 388 | __le16 cyl; |
| 389 | __le16 head; |
| 390 | |
| 391 | __le16 sect; |
| 392 | u8 array_id; |
| 393 | u8 reserved2; |
| 394 | |
| 395 | char name[40]; |
| 396 | |
| 397 | __le32 array_status; |
| 398 | |
| 399 | /* device list continues beyond this point? */ |
| 400 | } __attribute__((packed)); |
| 401 | |
| 402 | static int carm_init_one (struct pci_dev *pdev, const struct pci_device_id *ent); |
| 403 | static void carm_remove_one (struct pci_dev *pdev); |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 404 | static int carm_bdev_getgeo(struct block_device *bdev, struct hd_geometry *geo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | |
Márton Németh | 3d447ec | 2010-01-10 13:39:29 +0100 | [diff] [blame] | 406 | static const struct pci_device_id carm_pci_tbl[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | { PCI_VENDOR_ID_PROMISE, 0x8000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, }, |
| 408 | { PCI_VENDOR_ID_PROMISE, 0x8002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, }, |
| 409 | { } /* terminate list */ |
| 410 | }; |
| 411 | MODULE_DEVICE_TABLE(pci, carm_pci_tbl); |
| 412 | |
| 413 | static struct pci_driver carm_driver = { |
| 414 | .name = DRV_NAME, |
| 415 | .id_table = carm_pci_tbl, |
| 416 | .probe = carm_init_one, |
| 417 | .remove = carm_remove_one, |
| 418 | }; |
| 419 | |
Alexey Dobriyan | 83d5cde | 2009-09-21 17:01:13 -0700 | [diff] [blame] | 420 | static const struct block_device_operations carm_bd_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | .owner = THIS_MODULE, |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 422 | .getgeo = carm_bdev_getgeo, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | }; |
| 424 | |
| 425 | static unsigned int carm_host_id; |
| 426 | static unsigned long carm_major_alloc; |
| 427 | |
| 428 | |
| 429 | |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 430 | static int carm_bdev_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | { |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 432 | struct carm_port *port = bdev->bd_disk->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | |
Christoph Hellwig | a885c8c | 2006-01-08 01:02:50 -0800 | [diff] [blame] | 434 | geo->heads = (u8) port->dev_geom_head; |
| 435 | geo->sectors = (u8) port->dev_geom_sect; |
| 436 | geo->cylinders = port->dev_geom_cyl; |
| 437 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | } |
| 439 | |
| 440 | static const u32 msg_sizes[] = { 32, 64, 128, CARM_MSG_SIZE }; |
| 441 | |
| 442 | static inline int carm_lookup_bucket(u32 msg_size) |
| 443 | { |
| 444 | int i; |
| 445 | |
| 446 | for (i = 0; i < ARRAY_SIZE(msg_sizes); i++) |
| 447 | if (msg_size <= msg_sizes[i]) |
| 448 | return i; |
Jeff Garzik | 2d5a2ae | 2005-10-22 00:14:31 -0400 | [diff] [blame] | 449 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | return -ENOENT; |
| 451 | } |
| 452 | |
| 453 | static void carm_init_buckets(void __iomem *mmio) |
| 454 | { |
| 455 | unsigned int i; |
| 456 | |
| 457 | for (i = 0; i < ARRAY_SIZE(msg_sizes); i++) |
| 458 | writel(msg_sizes[i], mmio + CARM_CMS0 + (4 * i)); |
| 459 | } |
| 460 | |
| 461 | static inline void *carm_ref_msg(struct carm_host *host, |
| 462 | unsigned int msg_idx) |
| 463 | { |
| 464 | return host->msg_base + (msg_idx * CARM_MSG_SIZE); |
| 465 | } |
| 466 | |
| 467 | static inline dma_addr_t carm_ref_msg_dma(struct carm_host *host, |
| 468 | unsigned int msg_idx) |
| 469 | { |
| 470 | return host->msg_dma + (msg_idx * CARM_MSG_SIZE); |
| 471 | } |
| 472 | |
| 473 | static int carm_send_msg(struct carm_host *host, |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 474 | struct carm_request *crq, unsigned tag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | { |
| 476 | void __iomem *mmio = host->mmio; |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 477 | u32 msg = (u32) carm_ref_msg_dma(host, tag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | u32 cm_bucket = crq->msg_bucket; |
| 479 | u32 tmp; |
| 480 | int rc = 0; |
| 481 | |
| 482 | VPRINTK("ENTER\n"); |
| 483 | |
| 484 | tmp = readl(mmio + CARM_HMUC); |
| 485 | if (tmp & CARM_Q_FULL) { |
| 486 | #if 0 |
| 487 | tmp = readl(mmio + CARM_INT_MASK); |
| 488 | tmp |= INT_Q_AVAILABLE; |
| 489 | writel(tmp, mmio + CARM_INT_MASK); |
| 490 | readl(mmio + CARM_INT_MASK); /* flush */ |
| 491 | #endif |
| 492 | DPRINTK("host msg queue full\n"); |
| 493 | rc = -EBUSY; |
| 494 | } else { |
| 495 | writel(msg | (cm_bucket << 1), mmio + CARM_IHQP); |
| 496 | readl(mmio + CARM_IHQP); /* flush */ |
| 497 | } |
| 498 | |
| 499 | return rc; |
| 500 | } |
| 501 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | static int carm_array_info (struct carm_host *host, unsigned int array_idx) |
| 503 | { |
| 504 | struct carm_msg_ioctl *ioc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | u32 msg_data; |
| 506 | dma_addr_t msg_dma; |
| 507 | struct carm_request *crq; |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 508 | struct request *rq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | int rc; |
| 510 | |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 511 | rq = blk_mq_alloc_request(host->oob_q, REQ_OP_DRV_OUT, 0); |
| 512 | if (IS_ERR(rq)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | rc = -ENOMEM; |
| 514 | goto err_out; |
| 515 | } |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 516 | crq = blk_mq_rq_to_pdu(rq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 518 | ioc = carm_ref_msg(host, rq->tag); |
| 519 | msg_dma = carm_ref_msg_dma(host, rq->tag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | msg_data = (u32) (msg_dma + sizeof(struct carm_array_info)); |
| 521 | |
| 522 | crq->msg_type = CARM_MSG_ARRAY; |
| 523 | crq->msg_subtype = CARM_ARRAY_INFO; |
| 524 | rc = carm_lookup_bucket(sizeof(struct carm_msg_ioctl) + |
| 525 | sizeof(struct carm_array_info)); |
| 526 | BUG_ON(rc < 0); |
| 527 | crq->msg_bucket = (u32) rc; |
| 528 | |
| 529 | memset(ioc, 0, sizeof(*ioc)); |
| 530 | ioc->type = CARM_MSG_ARRAY; |
| 531 | ioc->subtype = CARM_ARRAY_INFO; |
| 532 | ioc->array_id = (u8) array_idx; |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 533 | ioc->handle = cpu_to_le32(TAG_ENCODE(rq->tag)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | ioc->data_addr = cpu_to_le32(msg_data); |
| 535 | |
| 536 | spin_lock_irq(&host->lock); |
| 537 | assert(host->state == HST_DEV_SCAN_START || |
| 538 | host->state == HST_DEV_SCAN); |
| 539 | spin_unlock_irq(&host->lock); |
| 540 | |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 541 | DPRINTK("blk_execute_rq_nowait, tag == %u\n", rq->tag); |
| 542 | blk_execute_rq_nowait(host->oob_q, NULL, rq, true, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | |
| 544 | return 0; |
| 545 | |
| 546 | err_out: |
| 547 | spin_lock_irq(&host->lock); |
| 548 | host->state = HST_ERROR; |
| 549 | spin_unlock_irq(&host->lock); |
| 550 | return rc; |
| 551 | } |
| 552 | |
| 553 | typedef unsigned int (*carm_sspc_t)(struct carm_host *, unsigned int, void *); |
| 554 | |
| 555 | static int carm_send_special (struct carm_host *host, carm_sspc_t func) |
| 556 | { |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 557 | struct request *rq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | struct carm_request *crq; |
| 559 | struct carm_msg_ioctl *ioc; |
| 560 | void *mem; |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 561 | unsigned int msg_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | int rc; |
| 563 | |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 564 | rq = blk_mq_alloc_request(host->oob_q, REQ_OP_DRV_OUT, 0); |
| 565 | if (IS_ERR(rq)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | return -ENOMEM; |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 567 | crq = blk_mq_rq_to_pdu(rq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 569 | mem = carm_ref_msg(host, rq->tag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 571 | msg_size = func(host, rq->tag, mem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | |
| 573 | ioc = mem; |
| 574 | crq->msg_type = ioc->type; |
| 575 | crq->msg_subtype = ioc->subtype; |
| 576 | rc = carm_lookup_bucket(msg_size); |
| 577 | BUG_ON(rc < 0); |
| 578 | crq->msg_bucket = (u32) rc; |
| 579 | |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 580 | DPRINTK("blk_execute_rq_nowait, tag == %u\n", rq->tag); |
| 581 | blk_execute_rq_nowait(host->oob_q, NULL, rq, true, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | |
| 583 | return 0; |
| 584 | } |
| 585 | |
| 586 | static unsigned int carm_fill_sync_time(struct carm_host *host, |
| 587 | unsigned int idx, void *mem) |
| 588 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | struct carm_msg_sync_time *st = mem; |
| 590 | |
Jens Axboe | 39fc883 | 2015-12-23 08:42:59 -0700 | [diff] [blame] | 591 | time64_t tv = ktime_get_real_seconds(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | |
| 593 | memset(st, 0, sizeof(*st)); |
| 594 | st->type = CARM_MSG_MISC; |
| 595 | st->subtype = MISC_SET_TIME; |
| 596 | st->handle = cpu_to_le32(TAG_ENCODE(idx)); |
Shraddha Barke | 8182503 | 2015-12-22 14:02:19 +0530 | [diff] [blame] | 597 | st->timestamp = cpu_to_le32(tv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | |
| 599 | return sizeof(struct carm_msg_sync_time); |
| 600 | } |
| 601 | |
| 602 | static unsigned int carm_fill_alloc_buf(struct carm_host *host, |
| 603 | unsigned int idx, void *mem) |
| 604 | { |
| 605 | struct carm_msg_allocbuf *ab = mem; |
| 606 | |
| 607 | memset(ab, 0, sizeof(*ab)); |
| 608 | ab->type = CARM_MSG_MISC; |
| 609 | ab->subtype = MISC_ALLOC_MEM; |
| 610 | ab->handle = cpu_to_le32(TAG_ENCODE(idx)); |
| 611 | ab->n_sg = 1; |
| 612 | ab->sg_type = SGT_32BIT; |
| 613 | ab->addr = cpu_to_le32(host->shm_dma + (PDC_SHM_SIZE >> 1)); |
| 614 | ab->len = cpu_to_le32(PDC_SHM_SIZE >> 1); |
| 615 | ab->evt_pool = cpu_to_le32(host->shm_dma + (16 * 1024)); |
| 616 | ab->n_evt = cpu_to_le32(1024); |
| 617 | ab->rbuf_pool = cpu_to_le32(host->shm_dma); |
| 618 | ab->n_rbuf = cpu_to_le32(RMSG_Q_LEN); |
| 619 | ab->msg_pool = cpu_to_le32(host->shm_dma + RBUF_LEN); |
| 620 | ab->n_msg = cpu_to_le32(CARM_Q_LEN); |
| 621 | ab->sg[0].start = cpu_to_le32(host->shm_dma + (PDC_SHM_SIZE >> 1)); |
| 622 | ab->sg[0].len = cpu_to_le32(65536); |
| 623 | |
| 624 | return sizeof(struct carm_msg_allocbuf); |
| 625 | } |
| 626 | |
| 627 | static unsigned int carm_fill_scan_channels(struct carm_host *host, |
| 628 | unsigned int idx, void *mem) |
| 629 | { |
| 630 | struct carm_msg_ioctl *ioc = mem; |
| 631 | u32 msg_data = (u32) (carm_ref_msg_dma(host, idx) + |
| 632 | IOC_SCAN_CHAN_OFFSET); |
| 633 | |
| 634 | memset(ioc, 0, sizeof(*ioc)); |
| 635 | ioc->type = CARM_MSG_IOCTL; |
| 636 | ioc->subtype = CARM_IOC_SCAN_CHAN; |
| 637 | ioc->handle = cpu_to_le32(TAG_ENCODE(idx)); |
| 638 | ioc->data_addr = cpu_to_le32(msg_data); |
| 639 | |
| 640 | /* fill output data area with "no device" default values */ |
| 641 | mem += IOC_SCAN_CHAN_OFFSET; |
| 642 | memset(mem, IOC_SCAN_CHAN_NODEV, CARM_MAX_PORTS); |
| 643 | |
| 644 | return IOC_SCAN_CHAN_OFFSET + CARM_MAX_PORTS; |
| 645 | } |
| 646 | |
| 647 | static unsigned int carm_fill_get_fw_ver(struct carm_host *host, |
| 648 | unsigned int idx, void *mem) |
| 649 | { |
| 650 | struct carm_msg_get_fw_ver *ioc = mem; |
| 651 | u32 msg_data = (u32) (carm_ref_msg_dma(host, idx) + sizeof(*ioc)); |
| 652 | |
| 653 | memset(ioc, 0, sizeof(*ioc)); |
| 654 | ioc->type = CARM_MSG_MISC; |
| 655 | ioc->subtype = MISC_GET_FW_VER; |
| 656 | ioc->handle = cpu_to_le32(TAG_ENCODE(idx)); |
| 657 | ioc->data_addr = cpu_to_le32(msg_data); |
| 658 | |
| 659 | return sizeof(struct carm_msg_get_fw_ver) + |
| 660 | sizeof(struct carm_fw_ver); |
| 661 | } |
| 662 | |
Jens Axboe | 165125e | 2007-07-24 09:28:11 +0200 | [diff] [blame] | 663 | static inline void carm_push_q (struct carm_host *host, struct request_queue *q) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 664 | { |
| 665 | unsigned int idx = host->wait_q_prod % CARM_MAX_WAIT_Q; |
| 666 | |
Jens Axboe | 0585b75 | 2018-10-15 08:53:45 -0600 | [diff] [blame] | 667 | blk_mq_stop_hw_queues(q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | VPRINTK("STOPPED QUEUE %p\n", q); |
| 669 | |
| 670 | host->wait_q[idx] = q; |
| 671 | host->wait_q_prod++; |
| 672 | BUG_ON(host->wait_q_prod == host->wait_q_cons); /* overrun */ |
| 673 | } |
| 674 | |
Jens Axboe | 165125e | 2007-07-24 09:28:11 +0200 | [diff] [blame] | 675 | static inline struct request_queue *carm_pop_q(struct carm_host *host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | { |
| 677 | unsigned int idx; |
| 678 | |
| 679 | if (host->wait_q_prod == host->wait_q_cons) |
| 680 | return NULL; |
| 681 | |
| 682 | idx = host->wait_q_cons % CARM_MAX_WAIT_Q; |
| 683 | host->wait_q_cons++; |
| 684 | |
| 685 | return host->wait_q[idx]; |
| 686 | } |
| 687 | |
| 688 | static inline void carm_round_robin(struct carm_host *host) |
| 689 | { |
Jens Axboe | 165125e | 2007-07-24 09:28:11 +0200 | [diff] [blame] | 690 | struct request_queue *q = carm_pop_q(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | if (q) { |
Jens Axboe | 0585b75 | 2018-10-15 08:53:45 -0600 | [diff] [blame] | 692 | blk_mq_start_hw_queues(q); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | VPRINTK("STARTED QUEUE %p\n", q); |
| 694 | } |
| 695 | } |
| 696 | |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 697 | static inline enum dma_data_direction carm_rq_dir(struct request *rq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | { |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 699 | return op_is_write(req_op(rq)) ? DMA_TO_DEVICE : DMA_FROM_DEVICE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | } |
| 701 | |
Jens Axboe | 0585b75 | 2018-10-15 08:53:45 -0600 | [diff] [blame] | 702 | static blk_status_t carm_queue_rq(struct blk_mq_hw_ctx *hctx, |
| 703 | const struct blk_mq_queue_data *bd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | { |
Jens Axboe | 0585b75 | 2018-10-15 08:53:45 -0600 | [diff] [blame] | 705 | struct request_queue *q = hctx->queue; |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 706 | struct request *rq = bd->rq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | struct carm_port *port = q->queuedata; |
| 708 | struct carm_host *host = port->host; |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 709 | struct carm_request *crq = blk_mq_rq_to_pdu(rq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | struct carm_msg_rw *msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | struct scatterlist *sg; |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 712 | int i, n_elem = 0, rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | unsigned int msg_size; |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 714 | u32 tmp; |
| 715 | |
| 716 | crq->n_elem = 0; |
| 717 | sg_init_table(crq->sg, CARM_MAX_REQ_SG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | |
Jens Axboe | 0585b75 | 2018-10-15 08:53:45 -0600 | [diff] [blame] | 719 | blk_mq_start_request(rq); |
| 720 | |
| 721 | spin_lock_irq(&host->lock); |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 722 | if (req_op(rq) == REQ_OP_DRV_OUT) |
| 723 | goto send_msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | |
| 725 | /* get scatterlist from block layer */ |
| 726 | sg = &crq->sg[0]; |
| 727 | n_elem = blk_rq_map_sg(q, rq, sg); |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 728 | if (n_elem <= 0) |
| 729 | goto out_ioerr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | |
| 731 | /* map scatterlist to PCI bus addresses */ |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 732 | n_elem = dma_map_sg(&host->pdev->dev, sg, n_elem, carm_rq_dir(rq)); |
| 733 | if (n_elem <= 0) |
| 734 | goto out_ioerr; |
| 735 | |
| 736 | /* obey global hardware limit on S/G entries */ |
| 737 | if (host->hw_sg_used >= CARM_MAX_HOST_SG - n_elem) |
| 738 | goto out_resource; |
| 739 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | crq->n_elem = n_elem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | host->hw_sg_used += n_elem; |
| 742 | |
| 743 | /* |
| 744 | * build read/write message |
| 745 | */ |
| 746 | |
| 747 | VPRINTK("build msg\n"); |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 748 | msg = (struct carm_msg_rw *) carm_ref_msg(host, rq->tag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 750 | if (rq_data_dir(rq) == WRITE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | msg->type = CARM_MSG_WRITE; |
| 752 | crq->msg_type = CARM_MSG_WRITE; |
| 753 | } else { |
| 754 | msg->type = CARM_MSG_READ; |
| 755 | crq->msg_type = CARM_MSG_READ; |
| 756 | } |
| 757 | |
| 758 | msg->id = port->port_no; |
| 759 | msg->sg_count = n_elem; |
| 760 | msg->sg_type = SGT_32BIT; |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 761 | msg->handle = cpu_to_le32(TAG_ENCODE(rq->tag)); |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 762 | msg->lba = cpu_to_le32(blk_rq_pos(rq) & 0xffffffff); |
| 763 | tmp = (blk_rq_pos(rq) >> 16) >> 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | msg->lba_high = cpu_to_le16( (u16) tmp ); |
Tejun Heo | 83096eb | 2009-05-07 22:24:39 +0900 | [diff] [blame] | 765 | msg->lba_count = cpu_to_le16(blk_rq_sectors(rq)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | |
| 767 | msg_size = sizeof(struct carm_msg_rw) - sizeof(msg->sg); |
| 768 | for (i = 0; i < n_elem; i++) { |
| 769 | struct carm_msg_sg *carm_sg = &msg->sg[i]; |
| 770 | carm_sg->start = cpu_to_le32(sg_dma_address(&crq->sg[i])); |
| 771 | carm_sg->len = cpu_to_le32(sg_dma_len(&crq->sg[i])); |
| 772 | msg_size += sizeof(struct carm_msg_sg); |
| 773 | } |
| 774 | |
| 775 | rc = carm_lookup_bucket(msg_size); |
| 776 | BUG_ON(rc < 0); |
| 777 | crq->msg_bucket = (u32) rc; |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 778 | send_msg: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | /* |
| 780 | * queue read/write message to hardware |
| 781 | */ |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 782 | VPRINTK("send msg, tag == %u\n", rq->tag); |
| 783 | rc = carm_send_msg(host, crq, rq->tag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 784 | if (rc) { |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 785 | host->hw_sg_used -= n_elem; |
| 786 | goto out_resource; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 787 | } |
| 788 | |
Jens Axboe | 0585b75 | 2018-10-15 08:53:45 -0600 | [diff] [blame] | 789 | spin_unlock_irq(&host->lock); |
| 790 | return BLK_STS_OK; |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 791 | out_resource: |
| 792 | dma_unmap_sg(&host->pdev->dev, &crq->sg[0], n_elem, carm_rq_dir(rq)); |
| 793 | carm_push_q(host, q); |
| 794 | spin_unlock_irq(&host->lock); |
| 795 | return BLK_STS_DEV_RESOURCE; |
| 796 | out_ioerr: |
| 797 | carm_round_robin(host); |
| 798 | spin_unlock_irq(&host->lock); |
| 799 | return BLK_STS_IOERR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | } |
| 801 | |
| 802 | static void carm_handle_array_info(struct carm_host *host, |
| 803 | struct carm_request *crq, u8 *mem, |
Christoph Hellwig | 2a842ac | 2017-06-03 09:38:04 +0200 | [diff] [blame] | 804 | blk_status_t error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | { |
| 806 | struct carm_port *port; |
| 807 | u8 *msg_data = mem + sizeof(struct carm_array_info); |
| 808 | struct carm_array_info *desc = (struct carm_array_info *) msg_data; |
| 809 | u64 lo, hi; |
| 810 | int cur_port; |
| 811 | size_t slen; |
| 812 | |
| 813 | DPRINTK("ENTER\n"); |
| 814 | |
Kiyoshi Ueda | a9c73d0 | 2007-12-11 17:46:10 -0500 | [diff] [blame] | 815 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | goto out; |
| 817 | if (le32_to_cpu(desc->array_status) & ARRAY_NO_EXIST) |
| 818 | goto out; |
| 819 | |
| 820 | cur_port = host->cur_scan_dev; |
| 821 | |
| 822 | /* should never occur */ |
| 823 | if ((cur_port < 0) || (cur_port >= CARM_MAX_PORTS)) { |
| 824 | printk(KERN_ERR PFX "BUG: cur_scan_dev==%d, array_id==%d\n", |
| 825 | cur_port, (int) desc->array_id); |
| 826 | goto out; |
| 827 | } |
| 828 | |
| 829 | port = &host->port[cur_port]; |
| 830 | |
| 831 | lo = (u64) le32_to_cpu(desc->size); |
| 832 | hi = (u64) le16_to_cpu(desc->size_hi); |
| 833 | |
| 834 | port->capacity = lo | (hi << 32); |
| 835 | port->dev_geom_head = le16_to_cpu(desc->head); |
| 836 | port->dev_geom_sect = le16_to_cpu(desc->sect); |
| 837 | port->dev_geom_cyl = le16_to_cpu(desc->cyl); |
| 838 | |
| 839 | host->dev_active |= (1 << cur_port); |
| 840 | |
| 841 | strncpy(port->name, desc->name, sizeof(port->name)); |
| 842 | port->name[sizeof(port->name) - 1] = 0; |
| 843 | slen = strlen(port->name); |
| 844 | while (slen && (port->name[slen - 1] == ' ')) { |
| 845 | port->name[slen - 1] = 0; |
| 846 | slen--; |
| 847 | } |
| 848 | |
| 849 | printk(KERN_INFO DRV_NAME "(%s): port %u device %Lu sectors\n", |
| 850 | pci_name(host->pdev), port->port_no, |
| 851 | (unsigned long long) port->capacity); |
| 852 | printk(KERN_INFO DRV_NAME "(%s): port %u device \"%s\"\n", |
| 853 | pci_name(host->pdev), port->port_no, port->name); |
| 854 | |
| 855 | out: |
| 856 | assert(host->state == HST_DEV_SCAN); |
| 857 | schedule_work(&host->fsm_task); |
| 858 | } |
| 859 | |
| 860 | static void carm_handle_scan_chan(struct carm_host *host, |
| 861 | struct carm_request *crq, u8 *mem, |
Christoph Hellwig | 2a842ac | 2017-06-03 09:38:04 +0200 | [diff] [blame] | 862 | blk_status_t error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | { |
| 864 | u8 *msg_data = mem + IOC_SCAN_CHAN_OFFSET; |
| 865 | unsigned int i, dev_count = 0; |
| 866 | int new_state = HST_DEV_SCAN_START; |
| 867 | |
| 868 | DPRINTK("ENTER\n"); |
| 869 | |
Kiyoshi Ueda | a9c73d0 | 2007-12-11 17:46:10 -0500 | [diff] [blame] | 870 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | new_state = HST_ERROR; |
| 872 | goto out; |
| 873 | } |
| 874 | |
| 875 | /* TODO: scan and support non-disk devices */ |
| 876 | for (i = 0; i < 8; i++) |
| 877 | if (msg_data[i] == 0) { /* direct-access device (disk) */ |
| 878 | host->dev_present |= (1 << i); |
| 879 | dev_count++; |
| 880 | } |
| 881 | |
| 882 | printk(KERN_INFO DRV_NAME "(%s): found %u interesting devices\n", |
| 883 | pci_name(host->pdev), dev_count); |
| 884 | |
| 885 | out: |
| 886 | assert(host->state == HST_PORT_SCAN); |
| 887 | host->state = new_state; |
| 888 | schedule_work(&host->fsm_task); |
| 889 | } |
| 890 | |
| 891 | static void carm_handle_generic(struct carm_host *host, |
Christoph Hellwig | 2a842ac | 2017-06-03 09:38:04 +0200 | [diff] [blame] | 892 | struct carm_request *crq, blk_status_t error, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | int cur_state, int next_state) |
| 894 | { |
| 895 | DPRINTK("ENTER\n"); |
| 896 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | assert(host->state == cur_state); |
Kiyoshi Ueda | a9c73d0 | 2007-12-11 17:46:10 -0500 | [diff] [blame] | 898 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | host->state = HST_ERROR; |
Kiyoshi Ueda | a9c73d0 | 2007-12-11 17:46:10 -0500 | [diff] [blame] | 900 | else |
| 901 | host->state = next_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | schedule_work(&host->fsm_task); |
| 903 | } |
| 904 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | static inline void carm_handle_resp(struct carm_host *host, |
| 906 | __le32 ret_handle_le, u32 status) |
| 907 | { |
| 908 | u32 handle = le32_to_cpu(ret_handle_le); |
| 909 | unsigned int msg_idx; |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 910 | struct request *rq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | struct carm_request *crq; |
Christoph Hellwig | 2a842ac | 2017-06-03 09:38:04 +0200 | [diff] [blame] | 912 | blk_status_t error = (status == RMSG_OK) ? 0 : BLK_STS_IOERR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | u8 *mem; |
| 914 | |
| 915 | VPRINTK("ENTER, handle == 0x%x\n", handle); |
| 916 | |
| 917 | if (unlikely(!TAG_VALID(handle))) { |
| 918 | printk(KERN_ERR DRV_NAME "(%s): BUG: invalid tag 0x%x\n", |
| 919 | pci_name(host->pdev), handle); |
| 920 | return; |
| 921 | } |
| 922 | |
| 923 | msg_idx = TAG_DECODE(handle); |
| 924 | VPRINTK("tag == %u\n", msg_idx); |
| 925 | |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 926 | rq = blk_mq_tag_to_rq(host->tag_set.tags[0], msg_idx); |
| 927 | crq = blk_mq_rq_to_pdu(rq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | |
| 929 | /* fast path */ |
| 930 | if (likely(crq->msg_type == CARM_MSG_READ || |
| 931 | crq->msg_type == CARM_MSG_WRITE)) { |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 932 | dma_unmap_sg(&host->pdev->dev, &crq->sg[0], crq->n_elem, |
| 933 | carm_rq_dir(rq)); |
| 934 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | } |
| 936 | |
| 937 | mem = carm_ref_msg(host, msg_idx); |
| 938 | |
| 939 | switch (crq->msg_type) { |
| 940 | case CARM_MSG_IOCTL: { |
| 941 | switch (crq->msg_subtype) { |
| 942 | case CARM_IOC_SCAN_CHAN: |
Kiyoshi Ueda | a9c73d0 | 2007-12-11 17:46:10 -0500 | [diff] [blame] | 943 | carm_handle_scan_chan(host, crq, mem, error); |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 944 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | default: |
| 946 | /* unknown / invalid response */ |
| 947 | goto err_out; |
| 948 | } |
| 949 | break; |
| 950 | } |
| 951 | |
| 952 | case CARM_MSG_MISC: { |
| 953 | switch (crq->msg_subtype) { |
| 954 | case MISC_ALLOC_MEM: |
Kiyoshi Ueda | a9c73d0 | 2007-12-11 17:46:10 -0500 | [diff] [blame] | 955 | carm_handle_generic(host, crq, error, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | HST_ALLOC_BUF, HST_SYNC_TIME); |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 957 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | case MISC_SET_TIME: |
Kiyoshi Ueda | a9c73d0 | 2007-12-11 17:46:10 -0500 | [diff] [blame] | 959 | carm_handle_generic(host, crq, error, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | HST_SYNC_TIME, HST_GET_FW_VER); |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 961 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | case MISC_GET_FW_VER: { |
| 963 | struct carm_fw_ver *ver = (struct carm_fw_ver *) |
Dan Carpenter | ea5f4db | 2012-03-03 12:09:17 +0100 | [diff] [blame] | 964 | (mem + sizeof(struct carm_msg_get_fw_ver)); |
Kiyoshi Ueda | a9c73d0 | 2007-12-11 17:46:10 -0500 | [diff] [blame] | 965 | if (!error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | host->fw_ver = le32_to_cpu(ver->version); |
| 967 | host->flags |= (ver->features & FL_FW_VER_MASK); |
| 968 | } |
Kiyoshi Ueda | a9c73d0 | 2007-12-11 17:46:10 -0500 | [diff] [blame] | 969 | carm_handle_generic(host, crq, error, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | HST_GET_FW_VER, HST_PORT_SCAN); |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 971 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | } |
| 973 | default: |
| 974 | /* unknown / invalid response */ |
| 975 | goto err_out; |
| 976 | } |
| 977 | break; |
| 978 | } |
| 979 | |
| 980 | case CARM_MSG_ARRAY: { |
| 981 | switch (crq->msg_subtype) { |
| 982 | case CARM_ARRAY_INFO: |
Kiyoshi Ueda | a9c73d0 | 2007-12-11 17:46:10 -0500 | [diff] [blame] | 983 | carm_handle_array_info(host, crq, mem, error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | break; |
| 985 | default: |
| 986 | /* unknown / invalid response */ |
| 987 | goto err_out; |
| 988 | } |
| 989 | break; |
| 990 | } |
| 991 | |
| 992 | default: |
| 993 | /* unknown / invalid response */ |
| 994 | goto err_out; |
| 995 | } |
| 996 | |
| 997 | return; |
| 998 | |
| 999 | err_out: |
| 1000 | printk(KERN_WARNING DRV_NAME "(%s): BUG: unhandled message type %d/%d\n", |
| 1001 | pci_name(host->pdev), crq->msg_type, crq->msg_subtype); |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 1002 | error = BLK_STS_IOERR; |
| 1003 | done: |
| 1004 | host->hw_sg_used -= crq->n_elem; |
| 1005 | blk_mq_end_request(blk_mq_rq_from_pdu(crq), error); |
| 1006 | |
| 1007 | if (host->hw_sg_used <= CARM_SG_LOW_WATER) |
| 1008 | carm_round_robin(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | } |
| 1010 | |
| 1011 | static inline void carm_handle_responses(struct carm_host *host) |
| 1012 | { |
| 1013 | void __iomem *mmio = host->mmio; |
| 1014 | struct carm_response *resp = (struct carm_response *) host->shm; |
| 1015 | unsigned int work = 0; |
| 1016 | unsigned int idx = host->resp_idx % RMSG_Q_LEN; |
| 1017 | |
| 1018 | while (1) { |
| 1019 | u32 status = le32_to_cpu(resp[idx].status); |
| 1020 | |
| 1021 | if (status == 0xffffffff) { |
| 1022 | VPRINTK("ending response on index %u\n", idx); |
| 1023 | writel(idx << 3, mmio + CARM_RESP_IDX); |
| 1024 | break; |
| 1025 | } |
| 1026 | |
| 1027 | /* response to a message we sent */ |
| 1028 | else if ((status & (1 << 31)) == 0) { |
| 1029 | VPRINTK("handling msg response on index %u\n", idx); |
| 1030 | carm_handle_resp(host, resp[idx].ret_handle, status); |
| 1031 | resp[idx].status = cpu_to_le32(0xffffffff); |
| 1032 | } |
| 1033 | |
| 1034 | /* asynchronous events the hardware throws our way */ |
| 1035 | else if ((status & 0xff000000) == (1 << 31)) { |
| 1036 | u8 *evt_type_ptr = (u8 *) &resp[idx]; |
| 1037 | u8 evt_type = *evt_type_ptr; |
| 1038 | printk(KERN_WARNING DRV_NAME "(%s): unhandled event type %d\n", |
| 1039 | pci_name(host->pdev), (int) evt_type); |
| 1040 | resp[idx].status = cpu_to_le32(0xffffffff); |
| 1041 | } |
| 1042 | |
| 1043 | idx = NEXT_RESP(idx); |
| 1044 | work++; |
| 1045 | } |
| 1046 | |
| 1047 | VPRINTK("EXIT, work==%u\n", work); |
| 1048 | host->resp_idx += work; |
| 1049 | } |
| 1050 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 1051 | static irqreturn_t carm_interrupt(int irq, void *__host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | { |
| 1053 | struct carm_host *host = __host; |
| 1054 | void __iomem *mmio; |
| 1055 | u32 mask; |
| 1056 | int handled = 0; |
| 1057 | unsigned long flags; |
| 1058 | |
| 1059 | if (!host) { |
| 1060 | VPRINTK("no host\n"); |
| 1061 | return IRQ_NONE; |
| 1062 | } |
| 1063 | |
| 1064 | spin_lock_irqsave(&host->lock, flags); |
| 1065 | |
| 1066 | mmio = host->mmio; |
| 1067 | |
| 1068 | /* reading should also clear interrupts */ |
| 1069 | mask = readl(mmio + CARM_INT_STAT); |
| 1070 | |
| 1071 | if (mask == 0 || mask == 0xffffffff) { |
| 1072 | VPRINTK("no work, mask == 0x%x\n", mask); |
| 1073 | goto out; |
| 1074 | } |
| 1075 | |
| 1076 | if (mask & INT_ACK_MASK) |
| 1077 | writel(mask, mmio + CARM_INT_STAT); |
| 1078 | |
| 1079 | if (unlikely(host->state == HST_INVALID)) { |
| 1080 | VPRINTK("not initialized yet, mask = 0x%x\n", mask); |
| 1081 | goto out; |
| 1082 | } |
| 1083 | |
| 1084 | if (mask & CARM_HAVE_RESP) { |
| 1085 | handled = 1; |
| 1086 | carm_handle_responses(host); |
| 1087 | } |
| 1088 | |
| 1089 | out: |
| 1090 | spin_unlock_irqrestore(&host->lock, flags); |
| 1091 | VPRINTK("EXIT\n"); |
| 1092 | return IRQ_RETVAL(handled); |
| 1093 | } |
| 1094 | |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1095 | static void carm_fsm_task (struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | { |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1097 | struct carm_host *host = |
| 1098 | container_of(work, struct carm_host, fsm_task); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | unsigned long flags; |
| 1100 | unsigned int state; |
| 1101 | int rc, i, next_dev; |
| 1102 | int reschedule = 0; |
| 1103 | int new_state = HST_INVALID; |
| 1104 | |
| 1105 | spin_lock_irqsave(&host->lock, flags); |
| 1106 | state = host->state; |
| 1107 | spin_unlock_irqrestore(&host->lock, flags); |
| 1108 | |
| 1109 | DPRINTK("ENTER, state == %s\n", state_name[state]); |
| 1110 | |
| 1111 | switch (state) { |
| 1112 | case HST_PROBE_START: |
| 1113 | new_state = HST_ALLOC_BUF; |
| 1114 | reschedule = 1; |
| 1115 | break; |
| 1116 | |
| 1117 | case HST_ALLOC_BUF: |
| 1118 | rc = carm_send_special(host, carm_fill_alloc_buf); |
| 1119 | if (rc) { |
| 1120 | new_state = HST_ERROR; |
| 1121 | reschedule = 1; |
| 1122 | } |
| 1123 | break; |
| 1124 | |
| 1125 | case HST_SYNC_TIME: |
| 1126 | rc = carm_send_special(host, carm_fill_sync_time); |
| 1127 | if (rc) { |
| 1128 | new_state = HST_ERROR; |
| 1129 | reschedule = 1; |
| 1130 | } |
| 1131 | break; |
| 1132 | |
| 1133 | case HST_GET_FW_VER: |
| 1134 | rc = carm_send_special(host, carm_fill_get_fw_ver); |
| 1135 | if (rc) { |
| 1136 | new_state = HST_ERROR; |
| 1137 | reschedule = 1; |
| 1138 | } |
| 1139 | break; |
| 1140 | |
| 1141 | case HST_PORT_SCAN: |
| 1142 | rc = carm_send_special(host, carm_fill_scan_channels); |
| 1143 | if (rc) { |
| 1144 | new_state = HST_ERROR; |
| 1145 | reschedule = 1; |
| 1146 | } |
| 1147 | break; |
| 1148 | |
| 1149 | case HST_DEV_SCAN_START: |
| 1150 | host->cur_scan_dev = -1; |
| 1151 | new_state = HST_DEV_SCAN; |
| 1152 | reschedule = 1; |
| 1153 | break; |
| 1154 | |
| 1155 | case HST_DEV_SCAN: |
| 1156 | next_dev = -1; |
| 1157 | for (i = host->cur_scan_dev + 1; i < CARM_MAX_PORTS; i++) |
| 1158 | if (host->dev_present & (1 << i)) { |
| 1159 | next_dev = i; |
| 1160 | break; |
| 1161 | } |
| 1162 | |
| 1163 | if (next_dev >= 0) { |
| 1164 | host->cur_scan_dev = next_dev; |
| 1165 | rc = carm_array_info(host, next_dev); |
| 1166 | if (rc) { |
| 1167 | new_state = HST_ERROR; |
| 1168 | reschedule = 1; |
| 1169 | } |
| 1170 | } else { |
| 1171 | new_state = HST_DEV_ACTIVATE; |
| 1172 | reschedule = 1; |
| 1173 | } |
| 1174 | break; |
| 1175 | |
| 1176 | case HST_DEV_ACTIVATE: { |
| 1177 | int activated = 0; |
| 1178 | for (i = 0; i < CARM_MAX_PORTS; i++) |
| 1179 | if (host->dev_active & (1 << i)) { |
| 1180 | struct carm_port *port = &host->port[i]; |
| 1181 | struct gendisk *disk = port->disk; |
| 1182 | |
| 1183 | set_capacity(disk, port->capacity); |
| 1184 | add_disk(disk); |
| 1185 | activated++; |
| 1186 | } |
| 1187 | |
| 1188 | printk(KERN_INFO DRV_NAME "(%s): %d ports activated\n", |
| 1189 | pci_name(host->pdev), activated); |
| 1190 | |
| 1191 | new_state = HST_PROBE_FINISHED; |
| 1192 | reschedule = 1; |
| 1193 | break; |
| 1194 | } |
| 1195 | |
| 1196 | case HST_PROBE_FINISHED: |
Steven Rostedt | 906c3b7 | 2006-01-09 15:59:26 -0800 | [diff] [blame] | 1197 | complete(&host->probe_comp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | break; |
| 1199 | |
| 1200 | case HST_ERROR: |
| 1201 | /* FIXME: TODO */ |
| 1202 | break; |
| 1203 | |
| 1204 | default: |
| 1205 | /* should never occur */ |
| 1206 | printk(KERN_ERR PFX "BUG: unknown state %d\n", state); |
| 1207 | assert(0); |
| 1208 | break; |
| 1209 | } |
| 1210 | |
| 1211 | if (new_state != HST_INVALID) { |
| 1212 | spin_lock_irqsave(&host->lock, flags); |
| 1213 | host->state = new_state; |
| 1214 | spin_unlock_irqrestore(&host->lock, flags); |
| 1215 | } |
| 1216 | if (reschedule) |
| 1217 | schedule_work(&host->fsm_task); |
| 1218 | } |
| 1219 | |
| 1220 | static int carm_init_wait(void __iomem *mmio, u32 bits, unsigned int test_bit) |
| 1221 | { |
| 1222 | unsigned int i; |
| 1223 | |
| 1224 | for (i = 0; i < 50000; i++) { |
| 1225 | u32 tmp = readl(mmio + CARM_LMUC); |
| 1226 | udelay(100); |
| 1227 | |
| 1228 | if (test_bit) { |
| 1229 | if ((tmp & bits) == bits) |
| 1230 | return 0; |
| 1231 | } else { |
| 1232 | if ((tmp & bits) == 0) |
| 1233 | return 0; |
| 1234 | } |
| 1235 | |
| 1236 | cond_resched(); |
| 1237 | } |
| 1238 | |
| 1239 | printk(KERN_ERR PFX "carm_init_wait timeout, bits == 0x%x, test_bit == %s\n", |
| 1240 | bits, test_bit ? "yes" : "no"); |
| 1241 | return -EBUSY; |
| 1242 | } |
| 1243 | |
| 1244 | static void carm_init_responses(struct carm_host *host) |
| 1245 | { |
| 1246 | void __iomem *mmio = host->mmio; |
| 1247 | unsigned int i; |
| 1248 | struct carm_response *resp = (struct carm_response *) host->shm; |
| 1249 | |
| 1250 | for (i = 0; i < RMSG_Q_LEN; i++) |
| 1251 | resp[i].status = cpu_to_le32(0xffffffff); |
| 1252 | |
| 1253 | writel(0, mmio + CARM_RESP_IDX); |
| 1254 | } |
| 1255 | |
| 1256 | static int carm_init_host(struct carm_host *host) |
| 1257 | { |
| 1258 | void __iomem *mmio = host->mmio; |
| 1259 | u32 tmp; |
| 1260 | u8 tmp8; |
| 1261 | int rc; |
| 1262 | |
| 1263 | DPRINTK("ENTER\n"); |
| 1264 | |
| 1265 | writel(0, mmio + CARM_INT_MASK); |
| 1266 | |
| 1267 | tmp8 = readb(mmio + CARM_INITC); |
| 1268 | if (tmp8 & 0x01) { |
| 1269 | tmp8 &= ~0x01; |
| 1270 | writeb(tmp8, mmio + CARM_INITC); |
| 1271 | readb(mmio + CARM_INITC); /* flush */ |
| 1272 | |
| 1273 | DPRINTK("snooze...\n"); |
| 1274 | msleep(5000); |
| 1275 | } |
| 1276 | |
| 1277 | tmp = readl(mmio + CARM_HMUC); |
| 1278 | if (tmp & CARM_CME) { |
| 1279 | DPRINTK("CME bit present, waiting\n"); |
| 1280 | rc = carm_init_wait(mmio, CARM_CME, 1); |
| 1281 | if (rc) { |
| 1282 | DPRINTK("EXIT, carm_init_wait 1 failed\n"); |
| 1283 | return rc; |
| 1284 | } |
| 1285 | } |
| 1286 | if (tmp & CARM_RME) { |
| 1287 | DPRINTK("RME bit present, waiting\n"); |
| 1288 | rc = carm_init_wait(mmio, CARM_RME, 1); |
| 1289 | if (rc) { |
| 1290 | DPRINTK("EXIT, carm_init_wait 2 failed\n"); |
| 1291 | return rc; |
| 1292 | } |
| 1293 | } |
| 1294 | |
| 1295 | tmp &= ~(CARM_RME | CARM_CME); |
| 1296 | writel(tmp, mmio + CARM_HMUC); |
| 1297 | readl(mmio + CARM_HMUC); /* flush */ |
| 1298 | |
| 1299 | rc = carm_init_wait(mmio, CARM_RME | CARM_CME, 0); |
| 1300 | if (rc) { |
| 1301 | DPRINTK("EXIT, carm_init_wait 3 failed\n"); |
| 1302 | return rc; |
| 1303 | } |
| 1304 | |
| 1305 | carm_init_buckets(mmio); |
| 1306 | |
| 1307 | writel(host->shm_dma & 0xffffffff, mmio + RBUF_ADDR_LO); |
| 1308 | writel((host->shm_dma >> 16) >> 16, mmio + RBUF_ADDR_HI); |
| 1309 | writel(RBUF_LEN, mmio + RBUF_BYTE_SZ); |
| 1310 | |
| 1311 | tmp = readl(mmio + CARM_HMUC); |
| 1312 | tmp |= (CARM_RME | CARM_CME | CARM_WZBC); |
| 1313 | writel(tmp, mmio + CARM_HMUC); |
| 1314 | readl(mmio + CARM_HMUC); /* flush */ |
| 1315 | |
| 1316 | rc = carm_init_wait(mmio, CARM_RME | CARM_CME, 1); |
| 1317 | if (rc) { |
| 1318 | DPRINTK("EXIT, carm_init_wait 4 failed\n"); |
| 1319 | return rc; |
| 1320 | } |
| 1321 | |
| 1322 | writel(0, mmio + CARM_HMPHA); |
| 1323 | writel(INT_DEF_MASK, mmio + CARM_INT_MASK); |
| 1324 | |
| 1325 | carm_init_responses(host); |
| 1326 | |
| 1327 | /* start initialization, probing state machine */ |
| 1328 | spin_lock_irq(&host->lock); |
| 1329 | assert(host->state == HST_INVALID); |
| 1330 | host->state = HST_PROBE_START; |
| 1331 | spin_unlock_irq(&host->lock); |
| 1332 | schedule_work(&host->fsm_task); |
| 1333 | |
| 1334 | DPRINTK("EXIT\n"); |
| 1335 | return 0; |
| 1336 | } |
| 1337 | |
Jens Axboe | 0585b75 | 2018-10-15 08:53:45 -0600 | [diff] [blame] | 1338 | static const struct blk_mq_ops carm_mq_ops = { |
| 1339 | .queue_rq = carm_queue_rq, |
| 1340 | }; |
| 1341 | |
Christoph Hellwig | cd94c9e | 2018-11-09 14:51:09 +0100 | [diff] [blame] | 1342 | static int carm_init_disk(struct carm_host *host, unsigned int port_no) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | { |
Christoph Hellwig | cd94c9e | 2018-11-09 14:51:09 +0100 | [diff] [blame] | 1344 | struct carm_port *port = &host->port[port_no]; |
| 1345 | struct gendisk *disk; |
| 1346 | struct request_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1347 | |
Christoph Hellwig | cd94c9e | 2018-11-09 14:51:09 +0100 | [diff] [blame] | 1348 | port->host = host; |
| 1349 | port->port_no = port_no; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | |
Christoph Hellwig | cd94c9e | 2018-11-09 14:51:09 +0100 | [diff] [blame] | 1351 | disk = alloc_disk(CARM_MINORS_PER_MAJOR); |
| 1352 | if (!disk) |
| 1353 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | |
Christoph Hellwig | cd94c9e | 2018-11-09 14:51:09 +0100 | [diff] [blame] | 1355 | port->disk = disk; |
| 1356 | sprintf(disk->disk_name, DRV_NAME "/%u", |
| 1357 | (unsigned int)host->id * CARM_MAX_PORTS + port_no); |
| 1358 | disk->major = host->major; |
| 1359 | disk->first_minor = port_no * CARM_MINORS_PER_MAJOR; |
| 1360 | disk->fops = &carm_bd_ops; |
| 1361 | disk->private_data = port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 1363 | q = blk_mq_init_queue(&host->tag_set); |
Christoph Hellwig | cd94c9e | 2018-11-09 14:51:09 +0100 | [diff] [blame] | 1364 | if (IS_ERR(q)) |
| 1365 | return PTR_ERR(q); |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 1366 | |
Christoph Hellwig | cd94c9e | 2018-11-09 14:51:09 +0100 | [diff] [blame] | 1367 | blk_queue_max_segments(q, CARM_MAX_REQ_SG); |
| 1368 | blk_queue_segment_boundary(q, CARM_SG_BOUNDARY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1369 | |
Christoph Hellwig | cd94c9e | 2018-11-09 14:51:09 +0100 | [diff] [blame] | 1370 | q->queuedata = port; |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 1371 | disk->queue = q; |
Christoph Hellwig | cd94c9e | 2018-11-09 14:51:09 +0100 | [diff] [blame] | 1372 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | } |
| 1374 | |
Christoph Hellwig | cd94c9e | 2018-11-09 14:51:09 +0100 | [diff] [blame] | 1375 | static void carm_free_disk(struct carm_host *host, unsigned int port_no) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | { |
Christoph Hellwig | cd94c9e | 2018-11-09 14:51:09 +0100 | [diff] [blame] | 1377 | struct carm_port *port = &host->port[port_no]; |
| 1378 | struct gendisk *disk = port->disk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | |
Christoph Hellwig | cd94c9e | 2018-11-09 14:51:09 +0100 | [diff] [blame] | 1380 | if (!disk) |
| 1381 | return; |
Jens Axboe | 0585b75 | 2018-10-15 08:53:45 -0600 | [diff] [blame] | 1382 | |
Christoph Hellwig | cd94c9e | 2018-11-09 14:51:09 +0100 | [diff] [blame] | 1383 | if (disk->flags & GENHD_FL_UP) |
| 1384 | del_gendisk(disk); |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 1385 | if (disk->queue) |
Christoph Hellwig | cd94c9e | 2018-11-09 14:51:09 +0100 | [diff] [blame] | 1386 | blk_cleanup_queue(disk->queue); |
Christoph Hellwig | cd94c9e | 2018-11-09 14:51:09 +0100 | [diff] [blame] | 1387 | put_disk(disk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | } |
| 1389 | |
| 1390 | static int carm_init_shm(struct carm_host *host) |
| 1391 | { |
Christoph Hellwig | 931da2f | 2018-10-18 15:15:13 +0200 | [diff] [blame] | 1392 | host->shm = dma_alloc_coherent(&host->pdev->dev, CARM_SHM_SIZE, |
| 1393 | &host->shm_dma, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | if (!host->shm) |
| 1395 | return -ENOMEM; |
| 1396 | |
| 1397 | host->msg_base = host->shm + RBUF_LEN; |
| 1398 | host->msg_dma = host->shm_dma + RBUF_LEN; |
| 1399 | |
| 1400 | memset(host->shm, 0xff, RBUF_LEN); |
| 1401 | memset(host->msg_base, 0, PDC_SHM_SIZE - RBUF_LEN); |
| 1402 | |
| 1403 | return 0; |
| 1404 | } |
| 1405 | |
| 1406 | static int carm_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) |
| 1407 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | struct carm_host *host; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1409 | int rc; |
Jens Axboe | 165125e | 2007-07-24 09:28:11 +0200 | [diff] [blame] | 1410 | struct request_queue *q; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | unsigned int i; |
| 1412 | |
Marcin Slusarz | 49b3a3c | 2009-08-24 10:56:38 +0200 | [diff] [blame] | 1413 | printk_once(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | |
| 1415 | rc = pci_enable_device(pdev); |
| 1416 | if (rc) |
| 1417 | return rc; |
| 1418 | |
| 1419 | rc = pci_request_regions(pdev, DRV_NAME); |
| 1420 | if (rc) |
| 1421 | goto err_out; |
| 1422 | |
Christoph Hellwig | 931da2f | 2018-10-18 15:15:13 +0200 | [diff] [blame] | 1423 | rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); |
Christoph Hellwig | 64ab1fa | 2018-10-18 15:15:12 +0200 | [diff] [blame] | 1424 | if (rc) { |
| 1425 | printk(KERN_ERR DRV_NAME "(%s): DMA mask failure\n", |
| 1426 | pci_name(pdev)); |
| 1427 | goto err_out_regions; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | |
Yoann Padioleau | dd00cc4 | 2007-07-19 01:49:03 -0700 | [diff] [blame] | 1430 | host = kzalloc(sizeof(*host), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | if (!host) { |
| 1432 | printk(KERN_ERR DRV_NAME "(%s): memory alloc failure\n", |
| 1433 | pci_name(pdev)); |
| 1434 | rc = -ENOMEM; |
| 1435 | goto err_out_regions; |
| 1436 | } |
| 1437 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | host->pdev = pdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | spin_lock_init(&host->lock); |
David Howells | c402895 | 2006-11-22 14:57:56 +0000 | [diff] [blame] | 1440 | INIT_WORK(&host->fsm_task, carm_fsm_task); |
Steven Rostedt | 906c3b7 | 2006-01-09 15:59:26 -0800 | [diff] [blame] | 1441 | init_completion(&host->probe_comp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | host->mmio = ioremap(pci_resource_start(pdev, 0), |
| 1444 | pci_resource_len(pdev, 0)); |
| 1445 | if (!host->mmio) { |
| 1446 | printk(KERN_ERR DRV_NAME "(%s): MMIO alloc failure\n", |
| 1447 | pci_name(pdev)); |
| 1448 | rc = -ENOMEM; |
| 1449 | goto err_out_kfree; |
| 1450 | } |
| 1451 | |
| 1452 | rc = carm_init_shm(host); |
| 1453 | if (rc) { |
| 1454 | printk(KERN_ERR DRV_NAME "(%s): DMA SHM alloc failure\n", |
| 1455 | pci_name(pdev)); |
| 1456 | goto err_out_iounmap; |
| 1457 | } |
| 1458 | |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 1459 | memset(&host->tag_set, 0, sizeof(host->tag_set)); |
| 1460 | host->tag_set.ops = &carm_mq_ops; |
| 1461 | host->tag_set.cmd_size = sizeof(struct carm_request); |
| 1462 | host->tag_set.nr_hw_queues = 1; |
| 1463 | host->tag_set.nr_maps = 1; |
| 1464 | host->tag_set.queue_depth = max_queue; |
| 1465 | host->tag_set.numa_node = NUMA_NO_NODE; |
| 1466 | host->tag_set.flags = BLK_MQ_F_SHOULD_MERGE; |
| 1467 | |
| 1468 | rc = blk_mq_alloc_tag_set(&host->tag_set); |
| 1469 | if (rc) |
| 1470 | goto err_out_dma_free; |
| 1471 | |
| 1472 | q = blk_mq_init_queue(&host->tag_set); |
Jens Axboe | 0585b75 | 2018-10-15 08:53:45 -0600 | [diff] [blame] | 1473 | if (IS_ERR(q)) { |
Jens Axboe | 0585b75 | 2018-10-15 08:53:45 -0600 | [diff] [blame] | 1474 | rc = PTR_ERR(q); |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 1475 | blk_mq_free_tag_set(&host->tag_set); |
Christoph Hellwig | 931da2f | 2018-10-18 15:15:13 +0200 | [diff] [blame] | 1476 | goto err_out_dma_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | } |
Christoph Hellwig | 72d7ce8 | 2018-11-09 14:51:10 +0100 | [diff] [blame] | 1478 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | host->oob_q = q; |
| 1480 | q->queuedata = host; |
| 1481 | |
| 1482 | /* |
| 1483 | * Figure out which major to use: 160, 161, or dynamic |
| 1484 | */ |
| 1485 | if (!test_and_set_bit(0, &carm_major_alloc)) |
| 1486 | host->major = 160; |
| 1487 | else if (!test_and_set_bit(1, &carm_major_alloc)) |
| 1488 | host->major = 161; |
| 1489 | else |
| 1490 | host->flags |= FL_DYN_MAJOR; |
| 1491 | |
| 1492 | host->id = carm_host_id; |
| 1493 | sprintf(host->name, DRV_NAME "%d", carm_host_id); |
| 1494 | |
| 1495 | rc = register_blkdev(host->major, host->name); |
| 1496 | if (rc < 0) |
| 1497 | goto err_out_free_majors; |
| 1498 | if (host->flags & FL_DYN_MAJOR) |
| 1499 | host->major = rc; |
| 1500 | |
Christoph Hellwig | cd94c9e | 2018-11-09 14:51:09 +0100 | [diff] [blame] | 1501 | for (i = 0; i < CARM_MAX_PORTS; i++) { |
| 1502 | rc = carm_init_disk(host, i); |
| 1503 | if (rc) |
| 1504 | goto err_out_blkdev_disks; |
| 1505 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | |
| 1507 | pci_set_master(pdev); |
| 1508 | |
Thomas Gleixner | 69ab391 | 2006-07-01 19:29:32 -0700 | [diff] [blame] | 1509 | rc = request_irq(pdev->irq, carm_interrupt, IRQF_SHARED, DRV_NAME, host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | if (rc) { |
| 1511 | printk(KERN_ERR DRV_NAME "(%s): irq alloc failure\n", |
| 1512 | pci_name(pdev)); |
| 1513 | goto err_out_blkdev_disks; |
| 1514 | } |
| 1515 | |
| 1516 | rc = carm_init_host(host); |
| 1517 | if (rc) |
| 1518 | goto err_out_free_irq; |
| 1519 | |
Steven Rostedt | 906c3b7 | 2006-01-09 15:59:26 -0800 | [diff] [blame] | 1520 | DPRINTK("waiting for probe_comp\n"); |
| 1521 | wait_for_completion(&host->probe_comp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1522 | |
Greg Kroah-Hartman | e29419f | 2006-06-12 15:20:16 -0700 | [diff] [blame] | 1523 | printk(KERN_INFO "%s: pci %s, ports %d, io %llx, irq %u, major %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1524 | host->name, pci_name(pdev), (int) CARM_MAX_PORTS, |
Greg Kroah-Hartman | e29419f | 2006-06-12 15:20:16 -0700 | [diff] [blame] | 1525 | (unsigned long long)pci_resource_start(pdev, 0), |
| 1526 | pdev->irq, host->major); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1527 | |
| 1528 | carm_host_id++; |
| 1529 | pci_set_drvdata(pdev, host); |
| 1530 | return 0; |
| 1531 | |
| 1532 | err_out_free_irq: |
| 1533 | free_irq(pdev->irq, host); |
| 1534 | err_out_blkdev_disks: |
Christoph Hellwig | cd94c9e | 2018-11-09 14:51:09 +0100 | [diff] [blame] | 1535 | for (i = 0; i < CARM_MAX_PORTS; i++) |
| 1536 | carm_free_disk(host, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1537 | unregister_blkdev(host->major, host->name); |
| 1538 | err_out_free_majors: |
| 1539 | if (host->major == 160) |
| 1540 | clear_bit(0, &carm_major_alloc); |
| 1541 | else if (host->major == 161) |
| 1542 | clear_bit(1, &carm_major_alloc); |
| 1543 | blk_cleanup_queue(host->oob_q); |
Jens Axboe | 0585b75 | 2018-10-15 08:53:45 -0600 | [diff] [blame] | 1544 | blk_mq_free_tag_set(&host->tag_set); |
Christoph Hellwig | 931da2f | 2018-10-18 15:15:13 +0200 | [diff] [blame] | 1545 | err_out_dma_free: |
| 1546 | dma_free_coherent(&pdev->dev, CARM_SHM_SIZE, host->shm, host->shm_dma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1547 | err_out_iounmap: |
| 1548 | iounmap(host->mmio); |
| 1549 | err_out_kfree: |
| 1550 | kfree(host); |
| 1551 | err_out_regions: |
| 1552 | pci_release_regions(pdev); |
| 1553 | err_out: |
| 1554 | pci_disable_device(pdev); |
| 1555 | return rc; |
| 1556 | } |
| 1557 | |
| 1558 | static void carm_remove_one (struct pci_dev *pdev) |
| 1559 | { |
| 1560 | struct carm_host *host = pci_get_drvdata(pdev); |
Christoph Hellwig | cd94c9e | 2018-11-09 14:51:09 +0100 | [diff] [blame] | 1561 | unsigned int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | |
| 1563 | if (!host) { |
| 1564 | printk(KERN_ERR PFX "BUG: no host data for PCI(%s)\n", |
| 1565 | pci_name(pdev)); |
| 1566 | return; |
| 1567 | } |
| 1568 | |
| 1569 | free_irq(pdev->irq, host); |
Christoph Hellwig | cd94c9e | 2018-11-09 14:51:09 +0100 | [diff] [blame] | 1570 | for (i = 0; i < CARM_MAX_PORTS; i++) |
| 1571 | carm_free_disk(host, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | unregister_blkdev(host->major, host->name); |
| 1573 | if (host->major == 160) |
| 1574 | clear_bit(0, &carm_major_alloc); |
| 1575 | else if (host->major == 161) |
| 1576 | clear_bit(1, &carm_major_alloc); |
| 1577 | blk_cleanup_queue(host->oob_q); |
Jens Axboe | 0585b75 | 2018-10-15 08:53:45 -0600 | [diff] [blame] | 1578 | blk_mq_free_tag_set(&host->tag_set); |
Christoph Hellwig | 931da2f | 2018-10-18 15:15:13 +0200 | [diff] [blame] | 1579 | dma_free_coherent(&pdev->dev, CARM_SHM_SIZE, host->shm, host->shm_dma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1580 | iounmap(host->mmio); |
| 1581 | kfree(host); |
| 1582 | pci_release_regions(pdev); |
| 1583 | pci_disable_device(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | } |
| 1585 | |
Jingoo Han | 28e6c50 | 2014-01-21 14:39:20 -0800 | [diff] [blame] | 1586 | module_pci_driver(carm_driver); |