| /* |
| * linux/drivers/acorn/scsi/fas216.c |
| * |
| * Copyright (C) 1997-2003 Russell King |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * Based on information in qlogicfas.c by Tom Zerucha, Michael Griffith, and |
| * other sources, including: |
| * the AMD Am53CF94 data sheet |
| * the AMD Am53C94 data sheet |
| * |
| * This is a generic driver. To use it, have a look at cumana_2.c. You |
| * should define your own structure that overlays FAS216_Info, eg: |
| * struct my_host_data { |
| * FAS216_Info info; |
| * ... my host specific data ... |
| * }; |
| * |
| * Changelog: |
| * 30-08-1997 RMK Created |
| * 14-09-1997 RMK Started disconnect support |
| * 08-02-1998 RMK Corrected real DMA support |
| * 15-02-1998 RMK Started sync xfer support |
| * 06-04-1998 RMK Tightened conditions for printing incomplete |
| * transfers |
| * 02-05-1998 RMK Added extra checks in fas216_reset |
| * 24-05-1998 RMK Fixed synchronous transfers with period >= 200ns |
| * 27-06-1998 RMK Changed asm/delay.h to linux/delay.h |
| * 26-08-1998 RMK Improved message support wrt MESSAGE_REJECT |
| * 02-04-2000 RMK Converted to use the new error handling, and |
| * automatically request sense data upon check |
| * condition status from targets. |
| */ |
| #include <linux/module.h> |
| #include <linux/blkdev.h> |
| #include <linux/kernel.h> |
| #include <linux/string.h> |
| #include <linux/ioport.h> |
| #include <linux/proc_fs.h> |
| #include <linux/delay.h> |
| #include <linux/bitops.h> |
| #include <linux/init.h> |
| #include <linux/interrupt.h> |
| |
| #include <asm/dma.h> |
| #include <asm/io.h> |
| #include <asm/irq.h> |
| #include <asm/ecard.h> |
| |
| #include "../scsi.h" |
| #include <scsi/scsi_dbg.h> |
| #include <scsi/scsi_host.h> |
| #include "fas216.h" |
| #include "scsi.h" |
| |
| /* NOTE: SCSI2 Synchronous transfers *require* DMA according to |
| * the data sheet. This restriction is crazy, especially when |
| * you only want to send 16 bytes! What were the guys who |
| * designed this chip on at that time? Did they read the SCSI2 |
| * spec at all? The following sections are taken from the SCSI2 |
| * standard (s2r10) concerning this: |
| * |
| * > IMPLEMENTORS NOTES: |
| * > (1) Re-negotiation at every selection is not recommended, since a |
| * > significant performance impact is likely. |
| * |
| * > The implied synchronous agreement shall remain in effect until a BUS DEVICE |
| * > RESET message is received, until a hard reset condition occurs, or until one |
| * > of the two SCSI devices elects to modify the agreement. The default data |
| * > transfer mode is asynchronous data transfer mode. The default data transfer |
| * > mode is entered at power on, after a BUS DEVICE RESET message, or after a hard |
| * > reset condition. |
| * |
| * In total, this means that once you have elected to use synchronous |
| * transfers, you must always use DMA. |
| * |
| * I was thinking that this was a good chip until I found this restriction ;( |
| */ |
| #define SCSI2_SYNC |
| #undef SCSI2_TAG |
| |
| #undef DEBUG_CONNECT |
| #undef DEBUG_MESSAGES |
| |
| #undef CHECK_STRUCTURE |
| |
| #define LOG_CONNECT (1 << 0) |
| #define LOG_BUSSERVICE (1 << 1) |
| #define LOG_FUNCTIONDONE (1 << 2) |
| #define LOG_MESSAGES (1 << 3) |
| #define LOG_BUFFER (1 << 4) |
| #define LOG_ERROR (1 << 8) |
| |
| static int level_mask = LOG_ERROR; |
| |
| module_param(level_mask, int, 0644); |
| |
| static int __init fas216_log_setup(char *str) |
| { |
| char *s; |
| |
| level_mask = 0; |
| |
| while ((s = strsep(&str, ",")) != NULL) { |
| switch (s[0]) { |
| case 'a': |
| if (strcmp(s, "all") == 0) |
| level_mask |= -1; |
| break; |
| case 'b': |
| if (strncmp(s, "bus", 3) == 0) |
| level_mask |= LOG_BUSSERVICE; |
| if (strncmp(s, "buf", 3) == 0) |
| level_mask |= LOG_BUFFER; |
| break; |
| case 'c': |
| level_mask |= LOG_CONNECT; |
| break; |
| case 'e': |
| level_mask |= LOG_ERROR; |
| break; |
| case 'm': |
| level_mask |= LOG_MESSAGES; |
| break; |
| case 'n': |
| if (strcmp(s, "none") == 0) |
| level_mask = 0; |
| break; |
| case 's': |
| level_mask |= LOG_FUNCTIONDONE; |
| break; |
| } |
| } |
| return 1; |
| } |
| |
| __setup("fas216_logging=", fas216_log_setup); |
| |
| static inline unsigned char fas216_readb(FAS216_Info *info, unsigned int reg) |
| { |
| unsigned int off = reg << info->scsi.io_shift; |
| return readb(info->scsi.io_base + off); |
| } |
| |
| static inline void fas216_writeb(FAS216_Info *info, unsigned int reg, unsigned int val) |
| { |
| unsigned int off = reg << info->scsi.io_shift; |
| writeb(val, info->scsi.io_base + off); |
| } |
| |
| static void fas216_dumpstate(FAS216_Info *info) |
| { |
| unsigned char is, stat, inst; |
| |
| is = fas216_readb(info, REG_IS); |
| stat = fas216_readb(info, REG_STAT); |
| inst = fas216_readb(info, REG_INST); |
| |
| printk("FAS216: CTCL=%02X CTCM=%02X CMD=%02X STAT=%02X" |
| " INST=%02X IS=%02X CFIS=%02X", |
| fas216_readb(info, REG_CTCL), |
| fas216_readb(info, REG_CTCM), |
| fas216_readb(info, REG_CMD), stat, inst, is, |
| fas216_readb(info, REG_CFIS)); |
| printk(" CNTL1=%02X CNTL2=%02X CNTL3=%02X CTCH=%02X\n", |
| fas216_readb(info, REG_CNTL1), |
| fas216_readb(info, REG_CNTL2), |
| fas216_readb(info, REG_CNTL3), |
| fas216_readb(info, REG_CTCH)); |
| } |
| |
| static void print_SCp(struct scsi_pointer *SCp, const char *prefix, const char *suffix) |
| { |
| printk("%sptr %p this_residual 0x%x buffer %p buffers_residual 0x%x%s", |
| prefix, SCp->ptr, SCp->this_residual, SCp->buffer, |
| SCp->buffers_residual, suffix); |
| } |
| |
| #ifdef CHECK_STRUCTURE |
| static void fas216_dumpinfo(FAS216_Info *info) |
| { |
| static int used = 0; |
| int i; |
| |
| if (used++) |
| return; |
| |
| printk("FAS216_Info=\n"); |
| printk(" { magic_start=%lX host=%p SCpnt=%p origSCpnt=%p\n", |
| info->magic_start, info->host, info->SCpnt, |
| info->origSCpnt); |
| printk(" scsi={ io_shift=%X irq=%X cfg={ %X %X %X %X }\n", |
| info->scsi.io_shift, info->scsi.irq, |
| info->scsi.cfg[0], info->scsi.cfg[1], info->scsi.cfg[2], |
| info->scsi.cfg[3]); |
| printk(" type=%p phase=%X\n", |
| info->scsi.type, info->scsi.phase); |
| print_SCp(&info->scsi.SCp, " SCp={ ", " }\n"); |
| printk(" msgs async_stp=%X disconnectable=%d aborting=%d }\n", |
| info->scsi.async_stp, |
| info->scsi.disconnectable, info->scsi.aborting); |
| printk(" stats={ queues=%X removes=%X fins=%X reads=%X writes=%X miscs=%X\n" |
| " disconnects=%X aborts=%X bus_resets=%X host_resets=%X}\n", |
| info->stats.queues, info->stats.removes, info->stats.fins, |
| info->stats.reads, info->stats.writes, info->stats.miscs, |
| info->stats.disconnects, info->stats.aborts, info->stats.bus_resets, |
| info->stats.host_resets); |
| printk(" ifcfg={ clockrate=%X select_timeout=%X asyncperiod=%X sync_max_depth=%X }\n", |
| info->ifcfg.clockrate, info->ifcfg.select_timeout, |
| info->ifcfg.asyncperiod, info->ifcfg.sync_max_depth); |
| for (i = 0; i < 8; i++) { |
| printk(" busyluns[%d]=%08lx dev[%d]={ disconnect_ok=%d stp=%X sof=%X sync_state=%X }\n", |
| i, info->busyluns[i], i, |
| info->device[i].disconnect_ok, info->device[i].stp, |
| info->device[i].sof, info->device[i].sync_state); |
| } |
| printk(" dma={ transfer_type=%X setup=%p pseudo=%p stop=%p }\n", |
| info->dma.transfer_type, info->dma.setup, |
| info->dma.pseudo, info->dma.stop); |
| printk(" internal_done=%X magic_end=%lX }\n", |
| info->internal_done, info->magic_end); |
| } |
| |
| static void __fas216_checkmagic(FAS216_Info *info, const char *func) |
| { |
| int corruption = 0; |
| if (info->magic_start != MAGIC) { |
| printk(KERN_CRIT "FAS216 Error: magic at start corrupted\n"); |
| corruption++; |
| } |
| if (info->magic_end != MAGIC) { |
| printk(KERN_CRIT "FAS216 Error: magic at end corrupted\n"); |
| corruption++; |
| } |
| if (corruption) { |
| fas216_dumpinfo(info); |
| panic("scsi memory space corrupted in %s", func); |
| } |
| } |
| #define fas216_checkmagic(info) __fas216_checkmagic((info), __func__) |
| #else |
| #define fas216_checkmagic(info) |
| #endif |
| |
| static const char *fas216_bus_phase(int stat) |
| { |
| static const char *phases[] = { |
| "DATA OUT", "DATA IN", |
| "COMMAND", "STATUS", |
| "MISC OUT", "MISC IN", |
| "MESG OUT", "MESG IN" |
| }; |
| |
| return phases[stat & STAT_BUSMASK]; |
| } |
| |
| static const char *fas216_drv_phase(FAS216_Info *info) |
| { |
| static const char *phases[] = { |
| [PHASE_IDLE] = "idle", |
| [PHASE_SELECTION] = "selection", |
| [PHASE_COMMAND] = "command", |
| [PHASE_DATAOUT] = "data out", |
| [PHASE_DATAIN] = "data in", |
| [PHASE_MSGIN] = "message in", |
| [PHASE_MSGIN_DISCONNECT]= "disconnect", |
| [PHASE_MSGOUT_EXPECT] = "expect message out", |
| [PHASE_MSGOUT] = "message out", |
| [PHASE_STATUS] = "status", |
| [PHASE_DONE] = "done", |
| }; |
| |
| if (info->scsi.phase < ARRAY_SIZE(phases) && |
| phases[info->scsi.phase]) |
| return phases[info->scsi.phase]; |
| return "???"; |
| } |
| |
| static char fas216_target(FAS216_Info *info) |
| { |
| if (info->SCpnt) |
| return '0' + info->SCpnt->device->id; |
| else |
| return 'H'; |
| } |
| |
| static void |
| fas216_do_log(FAS216_Info *info, char target, char *fmt, va_list ap) |
| { |
| static char buf[1024]; |
| |
| vsnprintf(buf, sizeof(buf), fmt, ap); |
| printk("scsi%d.%c: %s", info->host->host_no, target, buf); |
| } |
| |
| static void fas216_log_command(FAS216_Info *info, int level, |
| struct scsi_cmnd *SCpnt, char *fmt, ...) |
| { |
| va_list args; |
| |
| if (level != 0 && !(level & level_mask)) |
| return; |
| |
| va_start(args, fmt); |
| fas216_do_log(info, '0' + SCpnt->device->id, fmt, args); |
| va_end(args); |
| |
| scsi_print_command(SCpnt); |
| } |
| |
| static void |
| fas216_log_target(FAS216_Info *info, int level, int target, char *fmt, ...) |
| { |
| va_list args; |
| |
| if (level != 0 && !(level & level_mask)) |
| return; |
| |
| if (target < 0) |
| target = 'H'; |
| else |
| target += '0'; |
| |
| va_start(args, fmt); |
| fas216_do_log(info, target, fmt, args); |
| va_end(args); |
| |
| printk("\n"); |
| } |
| |
| static void fas216_log(FAS216_Info *info, int level, char *fmt, ...) |
| { |
| va_list args; |
| |
| if (level != 0 && !(level & level_mask)) |
| return; |
| |
| va_start(args, fmt); |
| fas216_do_log(info, fas216_target(info), fmt, args); |
| va_end(args); |
| |
| printk("\n"); |
| } |
| |
| #define PH_SIZE 32 |
| |
| static struct { int stat, ssr, isr, ph; } ph_list[PH_SIZE]; |
| static int ph_ptr; |
| |
| static void add_debug_list(int stat, int ssr, int isr, int ph) |
| { |
| ph_list[ph_ptr].stat = stat; |
| ph_list[ph_ptr].ssr = ssr; |
| ph_list[ph_ptr].isr = isr; |
| ph_list[ph_ptr].ph = ph; |
| |
| ph_ptr = (ph_ptr + 1) & (PH_SIZE-1); |
| } |
| |
| static struct { int command; void *from; } cmd_list[8]; |
| static int cmd_ptr; |
| |
| static void fas216_cmd(FAS216_Info *info, unsigned int command) |
| { |
| cmd_list[cmd_ptr].command = command; |
| cmd_list[cmd_ptr].from = __builtin_return_address(0); |
| |
| cmd_ptr = (cmd_ptr + 1) & 7; |
| |
| fas216_writeb(info, REG_CMD, command); |
| } |
| |
| static void print_debug_list(void) |
| { |
| int i; |
| |
| i = ph_ptr; |
| |
| printk(KERN_ERR "SCSI IRQ trail\n"); |
| do { |
| printk(" %02x:%02x:%02x:%1x", |
| ph_list[i].stat, ph_list[i].ssr, |
| ph_list[i].isr, ph_list[i].ph); |
| i = (i + 1) & (PH_SIZE - 1); |
| if (((i ^ ph_ptr) & 7) == 0) |
| printk("\n"); |
| } while (i != ph_ptr); |
| if ((i ^ ph_ptr) & 7) |
| printk("\n"); |
| |
| i = cmd_ptr; |
| printk(KERN_ERR "FAS216 commands: "); |
| do { |
| printk("%02x:%p ", cmd_list[i].command, cmd_list[i].from); |
| i = (i + 1) & 7; |
| } while (i != cmd_ptr); |
| printk("\n"); |
| } |
| |
| static void fas216_done(FAS216_Info *info, unsigned int result); |
| |
| /** |
| * fas216_get_last_msg - retrive last message from the list |
| * @info: interface to search |
| * @pos: current fifo position |
| * |
| * Retrieve a last message from the list, using position in fifo. |
| */ |
| static inline unsigned short |
| fas216_get_last_msg(FAS216_Info *info, int pos) |
| { |
| unsigned short packed_msg = NOP; |
| struct message *msg; |
| int msgnr = 0; |
| |
| while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) { |
| if (pos >= msg->fifo) |
| break; |
| } |
| |
| if (msg) { |
| if (msg->msg[0] == EXTENDED_MESSAGE) |
| packed_msg = EXTENDED_MESSAGE | msg->msg[2] << 8; |
| else |
| packed_msg = msg->msg[0]; |
| } |
| |
| fas216_log(info, LOG_MESSAGES, |
| "Message: %04x found at position %02x\n", packed_msg, pos); |
| |
| return packed_msg; |
| } |
| |
| /** |
| * fas216_syncperiod - calculate STP register value |
| * @info: state structure for interface connected to device |
| * @ns: period in ns (between subsequent bytes) |
| * |
| * Calculate value to be loaded into the STP register for a given period |
| * in ns. Returns a value suitable for REG_STP. |
| */ |
| static int fas216_syncperiod(FAS216_Info *info, int ns) |
| { |
| int value = (info->ifcfg.clockrate * ns) / 1000; |
| |
| fas216_checkmagic(info); |
| |
| if (value < 4) |
| value = 4; |
| else if (value > 35) |
| value = 35; |
| |
| return value & 31; |
| } |
| |
| /** |
| * fas216_set_sync - setup FAS216 chip for specified transfer period. |
| * @info: state structure for interface connected to device |
| * @target: target |
| * |
| * Correctly setup FAS216 chip for specified transfer period. |
| * Notes : we need to switch the chip out of FASTSCSI mode if we have |
| * a transfer period >= 200ns - otherwise the chip will violate |
| * the SCSI timings. |
| */ |
| static void fas216_set_sync(FAS216_Info *info, int target) |
| { |
| unsigned int cntl3; |
| |
| fas216_writeb(info, REG_SOF, info->device[target].sof); |
| fas216_writeb(info, REG_STP, info->device[target].stp); |
| |
| cntl3 = info->scsi.cfg[2]; |
| if (info->device[target].period >= (200 / 4)) |
| cntl3 = cntl3 & ~CNTL3_FASTSCSI; |
| |
| fas216_writeb(info, REG_CNTL3, cntl3); |
| } |
| |
| /* Synchronous transfer support |
| * |
| * Note: The SCSI II r10 spec says (5.6.12): |
| * |
| * (2) Due to historical problems with early host adapters that could |
| * not accept an SDTR message, some targets may not initiate synchronous |
| * negotiation after a power cycle as required by this standard. Host |
| * adapters that support synchronous mode may avoid the ensuing failure |
| * modes when the target is independently power cycled by initiating a |
| * synchronous negotiation on each REQUEST SENSE and INQUIRY command. |
| * This approach increases the SCSI bus overhead and is not recommended |
| * for new implementations. The correct method is to respond to an |
| * SDTR message with a MESSAGE REJECT message if the either the |
| * initiator or target devices does not support synchronous transfers |
| * or does not want to negotiate for synchronous transfers at the time. |
| * Using the correct method assures compatibility with wide data |
| * transfers and future enhancements. |
| * |
| * We will always initiate a synchronous transfer negotiation request on |
| * every INQUIRY or REQUEST SENSE message, unless the target itself has |
| * at some point performed a synchronous transfer negotiation request, or |
| * we have synchronous transfers disabled for this device. |
| */ |
| |
| /** |
| * fas216_handlesync - Handle a synchronous transfer message |
| * @info: state structure for interface |
| * @msg: message from target |
| * |
| * Handle a synchronous transfer message from the target |
| */ |
| static void fas216_handlesync(FAS216_Info *info, char *msg) |
| { |
| struct fas216_device *dev = &info->device[info->SCpnt->device->id]; |
| enum { sync, async, none, reject } res = none; |
| |
| #ifdef SCSI2_SYNC |
| switch (msg[0]) { |
| case MESSAGE_REJECT: |
| /* Synchronous transfer request failed. |
| * Note: SCSI II r10: |
| * |
| * SCSI devices that are capable of synchronous |
| * data transfers shall not respond to an SDTR |
| * message with a MESSAGE REJECT message. |
| * |
| * Hence, if we get this condition, we disable |
| * negotiation for this device. |
| */ |
| if (dev->sync_state == neg_inprogress) { |
| dev->sync_state = neg_invalid; |
| res = async; |
| } |
| break; |
| |
| case EXTENDED_MESSAGE: |
| switch (dev->sync_state) { |
| /* We don't accept synchronous transfer requests. |
| * Respond with a MESSAGE_REJECT to prevent a |
| * synchronous transfer agreement from being reached. |
| */ |
| case neg_invalid: |
| res = reject; |
| break; |
| |
| /* We were not negotiating a synchronous transfer, |
| * but the device sent us a negotiation request. |
| * Honour the request by sending back a SDTR |
| * message containing our capability, limited by |
| * the targets capability. |
| */ |
| default: |
| fas216_cmd(info, CMD_SETATN); |
| if (msg[4] > info->ifcfg.sync_max_depth) |
| msg[4] = info->ifcfg.sync_max_depth; |
| if (msg[3] < 1000 / info->ifcfg.clockrate) |
| msg[3] = 1000 / info->ifcfg.clockrate; |
| |
| msgqueue_flush(&info->scsi.msgs); |
| msgqueue_addmsg(&info->scsi.msgs, 5, |
| EXTENDED_MESSAGE, 3, EXTENDED_SDTR, |
| msg[3], msg[4]); |
| info->scsi.phase = PHASE_MSGOUT_EXPECT; |
| |
| /* This is wrong. The agreement is not in effect |
| * until this message is accepted by the device |
| */ |
| dev->sync_state = neg_targcomplete; |
| res = sync; |
| break; |
| |
| /* We initiated the synchronous transfer negotiation, |
| * and have successfully received a response from the |
| * target. The synchronous transfer agreement has been |
| * reached. Note: if the values returned are out of our |
| * bounds, we must reject the message. |
| */ |
| case neg_inprogress: |
| res = reject; |
| if (msg[4] <= info->ifcfg.sync_max_depth && |
| msg[3] >= 1000 / info->ifcfg.clockrate) { |
| dev->sync_state = neg_complete; |
| res = sync; |
| } |
| break; |
| } |
| } |
| #else |
| res = reject; |
| #endif |
| |
| switch (res) { |
| case sync: |
| dev->period = msg[3]; |
| dev->sof = msg[4]; |
| dev->stp = fas216_syncperiod(info, msg[3] * 4); |
| fas216_set_sync(info, info->SCpnt->device->id); |
| break; |
| |
| case reject: |
| fas216_cmd(info, CMD_SETATN); |
| msgqueue_flush(&info->scsi.msgs); |
| msgqueue_addmsg(&info->scsi.msgs, 1, MESSAGE_REJECT); |
| info->scsi.phase = PHASE_MSGOUT_EXPECT; |
| |
| case async: |
| dev->period = info->ifcfg.asyncperiod / 4; |
| dev->sof = 0; |
| dev->stp = info->scsi.async_stp; |
| fas216_set_sync(info, info->SCpnt->device->id); |
| break; |
| |
| case none: |
| break; |
| } |
| } |
| |
| /** |
| * fas216_updateptrs - update data pointers after transfer suspended/paused |
| * @info: interface's local pointer to update |
| * @bytes_transferred: number of bytes transferred |
| * |
| * Update data pointers after transfer suspended/paused |
| */ |
| static void fas216_updateptrs(FAS216_Info *info, int bytes_transferred) |
| { |
| struct scsi_pointer *SCp = &info->scsi.SCp; |
| |
| fas216_checkmagic(info); |
| |
| BUG_ON(bytes_transferred < 0); |
| |
| SCp->phase -= bytes_transferred; |
| |
| while (bytes_transferred != 0) { |
| if (SCp->this_residual > bytes_transferred) |
| break; |
| /* |
| * We have used up this buffer. Move on to the |
| * next buffer. |
| */ |
| bytes_transferred -= SCp->this_residual; |
| if (!next_SCp(SCp) && bytes_transferred) { |
| printk(KERN_WARNING "scsi%d.%c: out of buffers\n", |
| info->host->host_no, '0' + info->SCpnt->device->id); |
| return; |
| } |
| } |
| |
| SCp->this_residual -= bytes_transferred; |
| if (SCp->this_residual) |
| SCp->ptr += bytes_transferred; |
| else |
| SCp->ptr = NULL; |
| } |
| |
| /** |
| * fas216_pio - transfer data off of/on to card using programmed IO |
| * @info: interface to transfer data to/from |
| * @direction: direction to transfer data (DMA_OUT/DMA_IN) |
| * |
| * Transfer data off of/on to card using programmed IO. |
| * Notes: this is incredibly slow. |
| */ |
| static void fas216_pio(FAS216_Info *info, fasdmadir_t direction) |
| { |
| struct scsi_pointer *SCp = &info->scsi.SCp; |
| |
| fas216_checkmagic(info); |
| |
| if (direction == DMA_OUT) |
| fas216_writeb(info, REG_FF, get_next_SCp_byte(SCp)); |
| else |
| put_next_SCp_byte(SCp, fas216_readb(info, REG_FF)); |
| |
| if (SCp->this_residual == 0) |
| next_SCp(SCp); |
| } |
| |
| static void fas216_set_stc(FAS216_Info *info, unsigned int length) |
| { |
| fas216_writeb(info, REG_STCL, length); |
| fas216_writeb(info, REG_STCM, length >> 8); |
| fas216_writeb(info, REG_STCH, length >> 16); |
| } |
| |
| static unsigned int fas216_get_ctc(FAS216_Info *info) |
| { |
| return fas216_readb(info, REG_CTCL) + |
| (fas216_readb(info, REG_CTCM) << 8) + |
| (fas216_readb(info, REG_CTCH) << 16); |
| } |
| |
| /** |
| * fas216_cleanuptransfer - clean up after a transfer has completed. |
| * @info: interface to clean up |
| * |
| * Update the data pointers according to the number of bytes transferred |
| * on the SCSI bus. |
| */ |
| static void fas216_cleanuptransfer(FAS216_Info *info) |
| { |
| unsigned long total, residual, fifo; |
| fasdmatype_t dmatype = info->dma.transfer_type; |
| |
| info->dma.transfer_type = fasdma_none; |
| |
| /* |
| * PIO transfers do not need to be cleaned up. |
| */ |
| if (dmatype == fasdma_pio || dmatype == fasdma_none) |
| return; |
| |
| if (dmatype == fasdma_real_all) |
| total = info->scsi.SCp.phase; |
| else |
| total = info->scsi.SCp.this_residual; |
| |
| residual = fas216_get_ctc(info); |
| |
| fifo = fas216_readb(info, REG_CFIS) & CFIS_CF; |
| |
| fas216_log(info, LOG_BUFFER, "cleaning up from previous " |
| "transfer: length 0x%06x, residual 0x%x, fifo %d", |
| total, residual, fifo); |
| |
| /* |
| * If we were performing Data-Out, the transfer counter |
| * counts down each time a byte is transferred by the |
| * host to the FIFO. This means we must include the |
| * bytes left in the FIFO from the transfer counter. |
| */ |
| if (info->scsi.phase == PHASE_DATAOUT) |
| residual += fifo; |
| |
| fas216_updateptrs(info, total - residual); |
| } |
| |
| /** |
| * fas216_transfer - Perform a DMA/PIO transfer off of/on to card |
| * @info: interface from which device disconnected from |
| * |
| * Start a DMA/PIO transfer off of/on to card |
| */ |
| static void fas216_transfer(FAS216_Info *info) |
| { |
| fasdmadir_t direction; |
| fasdmatype_t dmatype; |
| |
| fas216_log(info, LOG_BUFFER, |
| "starttransfer: buffer %p length 0x%06x reqlen 0x%06x", |
| info->scsi.SCp.ptr, info->scsi.SCp.this_residual, |
| info->scsi.SCp.phase); |
| |
| if (!info->scsi.SCp.ptr) { |
| fas216_log(info, LOG_ERROR, "null buffer passed to " |
| "fas216_starttransfer"); |
| print_SCp(&info->scsi.SCp, "SCp: ", "\n"); |
| print_SCp(&info->SCpnt->SCp, "Cmnd SCp: ", "\n"); |
| return; |
| } |
| |
| /* |
| * If we have a synchronous transfer agreement in effect, we must |
| * use DMA mode. If we are using asynchronous transfers, we may |
| * use DMA mode or PIO mode. |
| */ |
| if (info->device[info->SCpnt->device->id].sof) |
| dmatype = fasdma_real_all; |
| else |
| dmatype = fasdma_pio; |
| |
| if (info->scsi.phase == PHASE_DATAOUT) |
| direction = DMA_OUT; |
| else |
| direction = DMA_IN; |
| |
| if (info->dma.setup) |
| dmatype = info->dma.setup(info->host, &info->scsi.SCp, |
| direction, dmatype); |
| info->dma.transfer_type = dmatype; |
| |
| if (dmatype == fasdma_real_all) |
| fas216_set_stc(info, info->scsi.SCp.phase); |
| else |
| fas216_set_stc(info, info->scsi.SCp.this_residual); |
| |
| switch (dmatype) { |
| case fasdma_pio: |
| fas216_log(info, LOG_BUFFER, "PIO transfer"); |
| fas216_writeb(info, REG_SOF, 0); |
| fas216_writeb(info, REG_STP, info->scsi.async_stp); |
| fas216_cmd(info, CMD_TRANSFERINFO); |
| fas216_pio(info, direction); |
| break; |
| |
| case fasdma_pseudo: |
| fas216_log(info, LOG_BUFFER, "pseudo transfer"); |
| fas216_cmd(info, CMD_TRANSFERINFO | CMD_WITHDMA); |
| info->dma.pseudo(info->host, &info->scsi.SCp, |
| direction, info->SCpnt->transfersize); |
| break; |
| |
| case fasdma_real_block: |
| fas216_log(info, LOG_BUFFER, "block dma transfer"); |
| fas216_cmd(info, CMD_TRANSFERINFO | CMD_WITHDMA); |
| break; |
| |
| case fasdma_real_all: |
| fas216_log(info, LOG_BUFFER, "total dma transfer"); |
| fas216_cmd(info, CMD_TRANSFERINFO | CMD_WITHDMA); |
| break; |
| |
| default: |
| fas216_log(info, LOG_BUFFER | LOG_ERROR, |
| "invalid FAS216 DMA type"); |
| break; |
| } |
| } |
| |
| /** |
| * fas216_stoptransfer - Stop a DMA transfer onto / off of the card |
| * @info: interface from which device disconnected from |
| * |
| * Called when we switch away from DATA IN or DATA OUT phases. |
| */ |
| static void fas216_stoptransfer(FAS216_Info *info) |
| { |
| fas216_checkmagic(info); |
| |
| if (info->dma.transfer_type == fasdma_real_all || |
| info->dma.transfer_type == fasdma_real_block) |
| info->dma.stop(info->host, &info->scsi.SCp); |
| |
| fas216_cleanuptransfer(info); |
| |
| if (info->scsi.phase == PHASE_DATAIN) { |
| unsigned int fifo; |
| |
| /* |
| * If we were performing Data-In, then the FIFO counter |
| * contains the number of bytes not transferred via DMA |
| * from the on-board FIFO. Read them manually. |
| */ |
| fifo = fas216_readb(info, REG_CFIS) & CFIS_CF; |
| while (fifo && info->scsi.SCp.ptr) { |
| *info->scsi.SCp.ptr = fas216_readb(info, REG_FF); |
| fas216_updateptrs(info, 1); |
| fifo--; |
| } |
| } else { |
| /* |
| * After a Data-Out phase, there may be unsent |
| * bytes left in the FIFO. Flush them out. |
| */ |
| fas216_cmd(info, CMD_FLUSHFIFO); |
| } |
| } |
| |
| static void fas216_aborttransfer(FAS216_Info *info) |
| { |
| fas216_checkmagic(info); |
| |
| if (info->dma.transfer_type == fasdma_real_all || |
| info->dma.transfer_type == fasdma_real_block) |
| info->dma.stop(info->host, &info->scsi.SCp); |
| |
| info->dma.transfer_type = fasdma_none; |
| fas216_cmd(info, CMD_FLUSHFIFO); |
| } |
| |
| static void fas216_kick(FAS216_Info *info); |
| |
| /** |
| * fas216_disconnected_intr - handle device disconnection |
| * @info: interface from which device disconnected from |
| * |
| * Handle device disconnection |
| */ |
| static void fas216_disconnect_intr(FAS216_Info *info) |
| { |
| unsigned long flags; |
| |
| fas216_checkmagic(info); |
| |
| fas216_log(info, LOG_CONNECT, "disconnect phase=%02x", |
| info->scsi.phase); |
| |
| msgqueue_flush(&info->scsi.msgs); |
| |
| switch (info->scsi.phase) { |
| case PHASE_SELECTION: /* while selecting - no target */ |
| case PHASE_SELSTEPS: |
| fas216_done(info, DID_NO_CONNECT); |
| break; |
| |
| case PHASE_MSGIN_DISCONNECT: /* message in - disconnecting */ |
| info->scsi.disconnectable = 1; |
| info->scsi.phase = PHASE_IDLE; |
| info->stats.disconnects += 1; |
| spin_lock_irqsave(&info->host_lock, flags); |
| if (info->scsi.phase == PHASE_IDLE) |
| fas216_kick(info); |
| spin_unlock_irqrestore(&info->host_lock, flags); |
| break; |
| |
| case PHASE_DONE: /* at end of command - complete */ |
| fas216_done(info, DID_OK); |
| break; |
| |
| case PHASE_MSGOUT: /* message out - possible ABORT message */ |
| if (fas216_get_last_msg(info, info->scsi.msgin_fifo) == ABORT) { |
| info->scsi.aborting = 0; |
| fas216_done(info, DID_ABORT); |
| break; |
| } |
| |
| default: /* huh? */ |
| printk(KERN_ERR "scsi%d.%c: unexpected disconnect in phase %s\n", |
| info->host->host_no, fas216_target(info), fas216_drv_phase(info)); |
| print_debug_list(); |
| fas216_stoptransfer(info); |
| fas216_done(info, DID_ERROR); |
| break; |
| } |
| } |
| |
| /** |
| * fas216_reselected_intr - start reconnection of a device |
| * @info: interface which was reselected |
| * |
| * Start reconnection of a device |
| */ |
| static void |
| fas216_reselected_intr(FAS216_Info *info) |
| { |
| unsigned int cfis, i; |
| unsigned char msg[4]; |
| unsigned char target, lun, tag; |
| |
| fas216_checkmagic(info); |
| |
| WARN_ON(info->scsi.phase == PHASE_SELECTION || |
| info->scsi.phase == PHASE_SELSTEPS); |
| |
| cfis = fas216_readb(info, REG_CFIS); |
| |
| fas216_log(info, LOG_CONNECT, "reconnect phase=%02x cfis=%02x", |
| info->scsi.phase, cfis); |
| |
| cfis &= CFIS_CF; |
| |
| if (cfis < 2 || cfis > 4) { |
| printk(KERN_ERR "scsi%d.H: incorrect number of bytes after reselect\n", |
| info->host->host_no); |
| goto bad_message; |
| } |
| |
| for (i = 0; i < cfis; i++) |
| msg[i] = fas216_readb(info, REG_FF); |
| |
| if (!(msg[0] & (1 << info->host->this_id)) || |
| !(msg[1] & 0x80)) |
| goto initiator_error; |
| |
| target = msg[0] & ~(1 << info->host->this_id); |
| target = ffs(target) - 1; |
| lun = msg[1] & 7; |
| tag = 0; |
| |
| if (cfis >= 3) { |
| if (msg[2] != SIMPLE_QUEUE_TAG) |
| goto initiator_error; |
| |
| tag = msg[3]; |
| } |
| |
| /* set up for synchronous transfers */ |
| fas216_writeb(info, REG_SDID, target); |
| fas216_set_sync(info, target); |
| msgqueue_flush(&info->scsi.msgs); |
| |
| fas216_log(info, LOG_CONNECT, "Reconnected: target %1x lun %1x tag %02x", |
| target, lun, tag); |
| |
| if (info->scsi.disconnectable && info->SCpnt) { |
| info->scsi.disconnectable = 0; |
| if (info->SCpnt->device->id == target && |
| info->SCpnt->device->lun == lun && |
| info->SCpnt->tag == tag) { |
| fas216_log(info, LOG_CONNECT, "reconnected previously executing command"); |
| } else { |
| queue_add_cmd_tail(&info->queues.disconnected, info->SCpnt); |
| fas216_log(info, LOG_CONNECT, "had to move command to disconnected queue"); |
| info->SCpnt = NULL; |
| } |
| } |
| if (!info->SCpnt) { |
| info->SCpnt = queue_remove_tgtluntag(&info->queues.disconnected, |
| target, lun, tag); |
| fas216_log(info, LOG_CONNECT, "had to get command"); |
| } |
| |
| if (info->SCpnt) { |
| /* |
| * Restore data pointer from SAVED data pointer |
| */ |
| info->scsi.SCp = info->SCpnt->SCp; |
| |
| fas216_log(info, LOG_CONNECT, "data pointers: [%p, %X]", |
| info->scsi.SCp.ptr, info->scsi.SCp.this_residual); |
| info->scsi.phase = PHASE_MSGIN; |
| } else { |
| /* |
| * Our command structure not found - abort the |
| * command on the target. Since we have no |
| * record of this command, we can't send |
| * an INITIATOR DETECTED ERROR message. |
| */ |
| fas216_cmd(info, CMD_SETATN); |
| |
| #if 0 |
| if (tag) |
| msgqueue_addmsg(&info->scsi.msgs, 2, ABORT_TAG, tag); |
| else |
| #endif |
| msgqueue_addmsg(&info->scsi.msgs, 1, ABORT); |
| info->scsi.phase = PHASE_MSGOUT_EXPECT; |
| info->scsi.aborting = 1; |
| } |
| |
| fas216_cmd(info, CMD_MSGACCEPTED); |
| return; |
| |
| initiator_error: |
| printk(KERN_ERR "scsi%d.H: error during reselection: bytes", |
| info->host->host_no); |
| for (i = 0; i < cfis; i++) |
| printk(" %02x", msg[i]); |
| printk("\n"); |
| bad_message: |
| fas216_cmd(info, CMD_SETATN); |
| msgqueue_flush(&info->scsi.msgs); |
| msgqueue_addmsg(&info->scsi.msgs, 1, INITIATOR_ERROR); |
| info->scsi.phase = PHASE_MSGOUT_EXPECT; |
| fas216_cmd(info, CMD_MSGACCEPTED); |
| } |
| |
| static void fas216_parse_message(FAS216_Info *info, unsigned char *message, int msglen) |
| { |
| int i; |
| |
| switch (message[0]) { |
| case COMMAND_COMPLETE: |
| if (msglen != 1) |
| goto unrecognised; |
| |
| printk(KERN_ERR "scsi%d.%c: command complete with no " |
| "status in MESSAGE_IN?\n", |
| info->host->host_no, fas216_target(info)); |
| break; |
| |
| case SAVE_POINTERS: |
| if (msglen != 1) |
| goto unrecognised; |
| |
| /* |
| * Save current data pointer to SAVED data pointer |
| * SCSI II standard says that we must not acknowledge |
| * this until we have really saved pointers. |
| * NOTE: we DO NOT save the command nor status pointers |
| * as required by the SCSI II standard. These always |
| * point to the start of their respective areas. |
| */ |
| info->SCpnt->SCp = info->scsi.SCp; |
| info->SCpnt->SCp.sent_command = 0; |
| fas216_log(info, LOG_CONNECT | LOG_MESSAGES | LOG_BUFFER, |
| "save data pointers: [%p, %X]", |
| info->scsi.SCp.ptr, info->scsi.SCp.this_residual); |
| break; |
| |
| case RESTORE_POINTERS: |
| if (msglen != 1) |
| goto unrecognised; |
| |
| /* |
| * Restore current data pointer from SAVED data pointer |
| */ |
| info->scsi.SCp = info->SCpnt->SCp; |
| fas216_log(info, LOG_CONNECT | LOG_MESSAGES | LOG_BUFFER, |
| "restore data pointers: [%p, 0x%x]", |
| info->scsi.SCp.ptr, info->scsi.SCp.this_residual); |
| break; |
| |
| case DISCONNECT: |
| if (msglen != 1) |
| goto unrecognised; |
| |
| info->scsi.phase = PHASE_MSGIN_DISCONNECT; |
| break; |
| |
| case MESSAGE_REJECT: |
| if (msglen != 1) |
| goto unrecognised; |
| |
| switch (fas216_get_last_msg(info, info->scsi.msgin_fifo)) { |
| case EXTENDED_MESSAGE | EXTENDED_SDTR << 8: |
| fas216_handlesync(info, message); |
| break; |
| |
| default: |
| fas216_log(info, 0, "reject, last message 0x%04x", |
| fas216_get_last_msg(info, info->scsi.msgin_fifo)); |
| } |
| break; |
| |
| case NOP: |
| break; |
| |
| case EXTENDED_MESSAGE: |
| if (msglen < 3) |
| goto unrecognised; |
| |
| switch (message[2]) { |
| case EXTENDED_SDTR: /* Sync transfer negotiation request/reply */ |
| fas216_handlesync(info, message); |
| break; |
| |
| default: |
| goto unrecognised; |
| } |
| break; |
| |
| default: |
| goto unrecognised; |
| } |
| return; |
| |
| unrecognised: |
| fas216_log(info, 0, "unrecognised message, rejecting"); |
| printk("scsi%d.%c: message was", info->host->host_no, fas216_target(info)); |
| for (i = 0; i < msglen; i++) |
| printk("%s%02X", i & 31 ? " " : "\n ", message[i]); |
| printk("\n"); |
| |
| /* |
| * Something strange seems to be happening here - |
| * I can't use SETATN since the chip gives me an |
| * invalid command interrupt when I do. Weird. |
| */ |
| fas216_cmd(info, CMD_NOP); |
| fas216_dumpstate(info); |
| fas216_cmd(info, CMD_SETATN); |
| msgqueue_flush(&info->scsi.msgs); |
| msgqueue_addmsg(&info->scsi.msgs, 1, MESSAGE_REJECT); |
| info->scsi.phase = PHASE_MSGOUT_EXPECT; |
| fas216_dumpstate(info); |
| } |
| |
| static int fas216_wait_cmd(FAS216_Info *info, int cmd) |
| { |
| int tout; |
| int stat; |
| |
| fas216_cmd(info, cmd); |
| |
| for (tout = 1000; tout; tout -= 1) { |
| stat = fas216_readb(info, REG_STAT); |
| if (stat & (STAT_INT|STAT_PARITYERROR)) |
| break; |
| udelay(1); |
| } |
| |
| return stat; |
| } |
| |
| static int fas216_get_msg_byte(FAS216_Info *info) |
| { |
| unsigned int stat = fas216_wait_cmd(info, CMD_MSGACCEPTED); |
| |
| if ((stat & STAT_INT) == 0) |
| goto timedout; |
| |
| if ((stat & STAT_BUSMASK) != STAT_MESGIN) |
| goto unexpected_phase_change; |
| |
| fas216_readb(info, REG_INST); |
| |
| stat = fas216_wait_cmd(info, CMD_TRANSFERINFO); |
| |
| if ((stat & STAT_INT) == 0) |
| goto timedout; |
| |
| if (stat & STAT_PARITYERROR) |
| goto parity_error; |
| |
| if ((stat & STAT_BUSMASK) != STAT_MESGIN) |
| goto unexpected_phase_change; |
| |
| fas216_readb(info, REG_INST); |
| |
| return fas216_readb(info, REG_FF); |
| |
| timedout: |
| fas216_log(info, LOG_ERROR, "timed out waiting for message byte"); |
| return -1; |
| |
| unexpected_phase_change: |
| fas216_log(info, LOG_ERROR, "unexpected phase change: status = %02x", stat); |
| return -2; |
| |
| parity_error: |
| fas216_log(info, LOG_ERROR, "parity error during message in phase"); |
| return -3; |
| } |
| |
| /** |
| * fas216_message - handle a function done interrupt from FAS216 chip |
| * @info: interface which caused function done interrupt |
| * |
| * Handle a function done interrupt from FAS216 chip |
| */ |
| static void fas216_message(FAS216_Info *info) |
| { |
| unsigned char *message = info->scsi.message; |
| unsigned int msglen = 1; |
| int msgbyte = 0; |
| |
| fas216_checkmagic(info); |
| |
| message[0] = fas216_readb(info, REG_FF); |
| |
| if (message[0] == EXTENDED_MESSAGE) { |
| msgbyte = fas216_get_msg_byte(info); |
| |
| if (msgbyte >= 0) { |
| message[1] = msgbyte; |
| |
| for (msglen = 2; msglen < message[1] + 2; msglen++) { |
| msgbyte = fas216_get_msg_byte(info); |
| |
| if (msgbyte >= 0) |
| message[msglen] = msgbyte; |
| else |
| break; |
| } |
| } |
| } |
| |
| if (msgbyte == -3) |
| goto parity_error; |
| |
| #ifdef DEBUG_MESSAGES |
| { |
| int i; |
| |
| printk("scsi%d.%c: message in: ", |
| info->host->host_no, fas216_target(info)); |
| for (i = 0; i < msglen; i++) |
| printk("%02X ", message[i]); |
| printk("\n"); |
| } |
| #endif |
| |
| fas216_parse_message(info, message, msglen); |
| fas216_cmd(info, CMD_MSGACCEPTED); |
| return; |
| |
| parity_error: |
| fas216_cmd(info, CMD_SETATN); |
| msgqueue_flush(&info->scsi.msgs); |
| msgqueue_addmsg(&info->scsi.msgs, 1, MSG_PARITY_ERROR); |
| info->scsi.phase = PHASE_MSGOUT_EXPECT; |
| fas216_cmd(info, CMD_MSGACCEPTED); |
| return; |
| } |
| |
| /** |
| * fas216_send_command - send command after all message bytes have been sent |
| * @info: interface which caused bus service |
| * |
| * Send a command to a target after all message bytes have been sent |
| */ |
| static void fas216_send_command(FAS216_Info *info) |
| { |
| int i; |
| |
| fas216_checkmagic(info); |
| |
| fas216_cmd(info, CMD_NOP|CMD_WITHDMA); |
| fas216_cmd(info, CMD_FLUSHFIFO); |
| |
| /* load command */ |
| for (i = info->scsi.SCp.sent_command; i < info->SCpnt->cmd_len; i++) |
| fas216_writeb(info, REG_FF, info->SCpnt->cmnd[i]); |
| |
| fas216_cmd(info, CMD_TRANSFERINFO); |
| |
| info->scsi.phase = PHASE_COMMAND; |
| } |
| |
| /** |
| * fas216_send_messageout - handle bus service to send a message |
| * @info: interface which caused bus service |
| * |
| * Handle bus service to send a message. |
| * Note: We do not allow the device to change the data direction! |
| */ |
| static void fas216_send_messageout(FAS216_Info *info, int start) |
| { |
| unsigned int tot_msglen = msgqueue_msglength(&info->scsi.msgs); |
| |
| fas216_checkmagic(info); |
| |
| fas216_cmd(info, CMD_FLUSHFIFO); |
| |
| if (tot_msglen) { |
| struct message *msg; |
| int msgnr = 0; |
| |
| while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) { |
| int i; |
| |
| for (i = start; i < msg->length; i++) |
| fas216_writeb(info, REG_FF, msg->msg[i]); |
| |
| msg->fifo = tot_msglen - (fas216_readb(info, REG_CFIS) & CFIS_CF); |
| start = 0; |
| } |
| } else |
| fas216_writeb(info, REG_FF, NOP); |
| |
| fas216_cmd(info, CMD_TRANSFERINFO); |
| |
| info->scsi.phase = PHASE_MSGOUT; |
| } |
| |
| /** |
| * fas216_busservice_intr - handle bus service interrupt from FAS216 chip |
| * @info: interface which caused bus service interrupt |
| * @stat: Status register contents |
| * @is: SCSI Status register contents |
| * |
| * Handle a bus service interrupt from FAS216 chip |
| */ |
| static void fas216_busservice_intr(FAS216_Info *info, unsigned int stat, unsigned int is) |
| { |
| fas216_checkmagic(info); |
| |
| fas216_log(info, LOG_BUSSERVICE, |
| "bus service: stat=%02x is=%02x phase=%02x", |
| stat, is, info->scsi.phase); |
| |
| switch (info->scsi.phase) { |
| case PHASE_SELECTION: |
| if ((is & IS_BITS) != IS_MSGBYTESENT) |
| goto bad_is; |
| break; |
| |
| case PHASE_SELSTEPS: |
| switch (is & IS_BITS) { |
| case IS_SELARB: |
| case IS_MSGBYTESENT: |
| goto bad_is; |
| |
| case IS_NOTCOMMAND: |
| case IS_EARLYPHASE: |
| if ((stat & STAT_BUSMASK) == STAT_MESGIN) |
| break; |
| goto bad_is; |
| |
| case IS_COMPLETE: |
| break; |
| } |
| |
| default: |
| break; |
| } |
| |
| fas216_cmd(info, CMD_NOP); |
| |
| #define STATE(st,ph) ((ph) << 3 | (st)) |
| /* This table describes the legal SCSI state transitions, |
| * as described by the SCSI II spec. |
| */ |
| switch (STATE(stat & STAT_BUSMASK, info->scsi.phase)) { |
| case STATE(STAT_DATAIN, PHASE_SELSTEPS):/* Sel w/ steps -> Data In */ |
| case STATE(STAT_DATAIN, PHASE_MSGOUT): /* Message Out -> Data In */ |
| case STATE(STAT_DATAIN, PHASE_COMMAND): /* Command -> Data In */ |
| case STATE(STAT_DATAIN, PHASE_MSGIN): /* Message In -> Data In */ |
| info->scsi.phase = PHASE_DATAIN; |
| fas216_transfer(info); |
| return; |
| |
| case STATE(STAT_DATAIN, PHASE_DATAIN): /* Data In -> Data In */ |
| case STATE(STAT_DATAOUT, PHASE_DATAOUT):/* Data Out -> Data Out */ |
| fas216_cleanuptransfer(info); |
| fas216_transfer(info); |
| return; |
| |
| case STATE(STAT_DATAOUT, PHASE_SELSTEPS):/* Sel w/ steps-> Data Out */ |
| case STATE(STAT_DATAOUT, PHASE_MSGOUT): /* Message Out -> Data Out */ |
| case STATE(STAT_DATAOUT, PHASE_COMMAND):/* Command -> Data Out */ |
| case STATE(STAT_DATAOUT, PHASE_MSGIN): /* Message In -> Data Out */ |
| fas216_cmd(info, CMD_FLUSHFIFO); |
| info->scsi.phase = PHASE_DATAOUT; |
| fas216_transfer(info); |
| return; |
| |
| case STATE(STAT_STATUS, PHASE_DATAOUT): /* Data Out -> Status */ |
| case STATE(STAT_STATUS, PHASE_DATAIN): /* Data In -> Status */ |
| fas216_stoptransfer(info); |
| case STATE(STAT_STATUS, PHASE_SELSTEPS):/* Sel w/ steps -> Status */ |
| case STATE(STAT_STATUS, PHASE_MSGOUT): /* Message Out -> Status */ |
| case STATE(STAT_STATUS, PHASE_COMMAND): /* Command -> Status */ |
| case STATE(STAT_STATUS, PHASE_MSGIN): /* Message In -> Status */ |
| fas216_cmd(info, CMD_INITCMDCOMPLETE); |
| info->scsi.phase = PHASE_STATUS; |
| return; |
| |
| case STATE(STAT_MESGIN, PHASE_DATAOUT): /* Data Out -> Message In */ |
| case STATE(STAT_MESGIN, PHASE_DATAIN): /* Data In -> Message In */ |
| fas216_stoptransfer(info); |
| case STATE(STAT_MESGIN, PHASE_COMMAND): /* Command -> Message In */ |
| case STATE(STAT_MESGIN, PHASE_SELSTEPS):/* Sel w/ steps -> Message In */ |
| case STATE(STAT_MESGIN, PHASE_MSGOUT): /* Message Out -> Message In */ |
| info->scsi.msgin_fifo = fas216_readb(info, REG_CFIS) & CFIS_CF; |
| fas216_cmd(info, CMD_FLUSHFIFO); |
| fas216_cmd(info, CMD_TRANSFERINFO); |
| info->scsi.phase = PHASE_MSGIN; |
| return; |
| |
| case STATE(STAT_MESGIN, PHASE_MSGIN): |
| info->scsi.msgin_fifo = fas216_readb(info, REG_CFIS) & CFIS_CF; |
| fas216_cmd(info, CMD_TRANSFERINFO); |
| return; |
| |
| case STATE(STAT_COMMAND, PHASE_MSGOUT): /* Message Out -> Command */ |
| case STATE(STAT_COMMAND, PHASE_MSGIN): /* Message In -> Command */ |
| fas216_send_command(info); |
| info->scsi.phase = PHASE_COMMAND; |
| return; |
| |
| |
| /* |
| * Selection -> Message Out |
| */ |
| case STATE(STAT_MESGOUT, PHASE_SELECTION): |
| fas216_send_messageout(info, 1); |
| return; |
| |
| /* |
| * Message Out -> Message Out |
| */ |
| case STATE(STAT_MESGOUT, PHASE_SELSTEPS): |
| case STATE(STAT_MESGOUT, PHASE_MSGOUT): |
| /* |
| * If we get another message out phase, this usually |
| * means some parity error occurred. Resend complete |
| * set of messages. If we have more than one byte to |
| * send, we need to assert ATN again. |
| */ |
| if (info->device[info->SCpnt->device->id].parity_check) { |
| /* |
| * We were testing... good, the device |
| * supports parity checking. |
| */ |
| info->device[info->SCpnt->device->id].parity_check = 0; |
| info->device[info->SCpnt->device->id].parity_enabled = 1; |
| fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]); |
| } |
| |
| if (msgqueue_msglength(&info->scsi.msgs) > 1) |
| fas216_cmd(info, CMD_SETATN); |
| /*FALLTHROUGH*/ |
| |
| /* |
| * Any -> Message Out |
| */ |
| case STATE(STAT_MESGOUT, PHASE_MSGOUT_EXPECT): |
| fas216_send_messageout(info, 0); |
| return; |
| |
| /* Error recovery rules. |
| * These either attempt to abort or retry the operation. |
| * TODO: we need more of these |
| */ |
| case STATE(STAT_COMMAND, PHASE_COMMAND):/* Command -> Command */ |
| /* error - we've sent out all the command bytes |
| * we have. |
| * NOTE: we need SAVE DATA POINTERS/RESTORE DATA POINTERS |
| * to include the command bytes sent for this to work |
| * correctly. |
| */ |
| printk(KERN_ERR "scsi%d.%c: " |
| "target trying to receive more command bytes\n", |
| info->host->host_no, fas216_target(info)); |
| fas216_cmd(info, CMD_SETATN); |
| fas216_set_stc(info, 15); |
| fas216_cmd(info, CMD_PADBYTES | CMD_WITHDMA); |
| msgqueue_flush(&info->scsi.msgs); |
| msgqueue_addmsg(&info->scsi.msgs, 1, INITIATOR_ERROR); |
| info->scsi.phase = PHASE_MSGOUT_EXPECT; |
| return; |
| } |
| |
| if (info->scsi.phase == PHASE_MSGIN_DISCONNECT) { |
| printk(KERN_ERR "scsi%d.%c: disconnect message received, but bus service %s?\n", |
| info->host->host_no, fas216_target(info), |
| fas216_bus_phase(stat)); |
| msgqueue_flush(&info->scsi.msgs); |
| fas216_cmd(info, CMD_SETATN); |
| msgqueue_addmsg(&info->scsi.msgs, 1, INITIATOR_ERROR); |
| info->scsi.phase = PHASE_MSGOUT_EXPECT; |
| info->scsi.aborting = 1; |
| fas216_cmd(info, CMD_TRANSFERINFO); |
| return; |
| } |
| printk(KERN_ERR "scsi%d.%c: bus phase %s after %s?\n", |
| info->host->host_no, fas216_target(info), |
| fas216_bus_phase(stat), |
| fas216_drv_phase(info)); |
| print_debug_list(); |
| return; |
| |
| bad_is: |
| fas216_log(info, 0, "bus service at step %d?", is & IS_BITS); |
| fas216_dumpstate(info); |
| print_debug_list(); |
| |
| fas216_done(info, DID_ERROR); |
| } |
| |
| /** |
| * fas216_funcdone_intr - handle a function done interrupt from FAS216 chip |
| * @info: interface which caused function done interrupt |
| * @stat: Status register contents |
| * @is: SCSI Status register contents |
| * |
| * Handle a function done interrupt from FAS216 chip |
| */ |
| static void fas216_funcdone_intr(FAS216_Info *info, unsigned int stat, unsigned int is) |
| { |
| unsigned int fifo_len = fas216_readb(info, REG_CFIS) & CFIS_CF; |
| |
| fas216_checkmagic(info); |
| |
| fas216_log(info, LOG_FUNCTIONDONE, |
| "function done: stat=%02x is=%02x phase=%02x", |
| stat, is, info->scsi.phase); |
| |
| switch (info->scsi.phase) { |
| case PHASE_STATUS: /* status phase - read status and msg */ |
| if (fifo_len != 2) { |
| fas216_log(info, 0, "odd number of bytes in FIFO: %d", fifo_len); |
| } |
| /* |
| * Read status then message byte. |
| */ |
| info->scsi.SCp.Status = fas216_readb(info, REG_FF); |
| info->scsi.SCp.Message = fas216_readb(info, REG_FF); |
| info->scsi.phase = PHASE_DONE; |
| fas216_cmd(info, CMD_MSGACCEPTED); |
| break; |
| |
| case PHASE_IDLE: |
| case PHASE_SELECTION: |
| case PHASE_SELSTEPS: |
| break; |
| |
| case PHASE_MSGIN: /* message in phase */ |
| if ((stat & STAT_BUSMASK) == STAT_MESGIN) { |
| info->scsi.msgin_fifo = fifo_len; |
| fas216_message(info); |
| break; |
| } |
| |
| default: |
| fas216_log(info, 0, "internal phase %s for function done?" |
| " What do I do with this?", |
| fas216_target(info), fas216_drv_phase(info)); |
| } |
| } |
| |
| static void fas216_bus_reset(FAS216_Info *info) |
| { |
| neg_t sync_state; |
| int i; |
| |
| msgqueue_flush(&info->scsi.msgs); |
| |
| sync_state = neg_invalid; |
| |
| #ifdef SCSI2_SYNC |
| if (info->ifcfg.capabilities & (FASCAP_DMA|FASCAP_PSEUDODMA)) |
| sync_state = neg_wait; |
| #endif |
| |
| info->scsi.phase = PHASE_IDLE; |
| info->SCpnt = NULL; /* bug! */ |
| memset(&info->scsi.SCp, 0, sizeof(info->scsi.SCp)); |
| |
| for (i = 0; i < 8; i++) { |
| info->device[i].disconnect_ok = info->ifcfg.disconnect_ok; |
| info->device[i].sync_state = sync_state; |
| info->device[i].period = info->ifcfg.asyncperiod / 4; |
| info->device[i].stp = info->scsi.async_stp; |
| info->device[i].sof = 0; |
| info->device[i].wide_xfer = 0; |
| } |
| |
| info->rst_bus_status = 1; |
| wake_up(&info->eh_wait); |
| } |
| |
| /** |
| * fas216_intr - handle interrupts to progress a command |
| * @info: interface to service |
| * |
| * Handle interrupts from the interface to progress a command |
| */ |
| irqreturn_t fas216_intr(FAS216_Info *info) |
| { |
| unsigned char inst, is, stat; |
| int handled = IRQ_NONE; |
| |
| fas216_checkmagic(info); |
| |
| stat = fas216_readb(info, REG_STAT); |
| is = fas216_readb(info, REG_IS); |
| inst = fas216_readb(info, REG_INST); |
| |
| add_debug_list(stat, is, inst, info->scsi.phase); |
| |
| if (stat & STAT_INT) { |
| if (inst & INST_BUSRESET) { |
| fas216_log(info, 0, "bus reset detected"); |
| fas216_bus_reset(info); |
| scsi_report_bus_reset(info->host, 0); |
| } else if (inst & INST_ILLEGALCMD) { |
| fas216_log(info, LOG_ERROR, "illegal command given\n"); |
| fas216_dumpstate(info); |
| print_debug_list(); |
| } else if (inst & INST_DISCONNECT) |
| fas216_disconnect_intr(info); |
| else if (inst & INST_RESELECTED) /* reselected */ |
| fas216_reselected_intr(info); |
| else if (inst & INST_BUSSERVICE) /* bus service request */ |
| fas216_busservice_intr(info, stat, is); |
| else if (inst & INST_FUNCDONE) /* function done */ |
| fas216_funcdone_intr(info, stat, is); |
| else |
| fas216_log(info, 0, "unknown interrupt received:" |
| " phase %s inst %02X is %02X stat %02X", |
| fas216_drv_phase(info), inst, is, stat); |
| handled = IRQ_HANDLED; |
| } |
| return handled; |
| } |
| |
| static void __fas216_start_command(FAS216_Info *info, struct scsi_cmnd *SCpnt) |
| { |
| int tot_msglen; |
| |
| /* following what the ESP driver says */ |
| fas216_set_stc(info, 0); |
| fas216_cmd(info, CMD_NOP | CMD_WITHDMA); |
| |
| /* flush FIFO */ |
| fas216_cmd(info, CMD_FLUSHFIFO); |
| |
| /* load bus-id and timeout */ |
| fas216_writeb(info, REG_SDID, BUSID(SCpnt->device->id)); |
| fas216_writeb(info, REG_STIM, info->ifcfg.select_timeout); |
| |
| /* synchronous transfers */ |
| fas216_set_sync(info, SCpnt->device->id); |
| |
| tot_msglen = msgqueue_msglength(&info->scsi.msgs); |
| |
| #ifdef DEBUG_MESSAGES |
| { |
| struct message *msg; |
| int msgnr = 0, i; |
| |
| printk("scsi%d.%c: message out: ", |
| info->host->host_no, '0' + SCpnt->device->id); |
| while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) { |
| printk("{ "); |
| for (i = 0; i < msg->length; i++) |
| printk("%02x ", msg->msg[i]); |
| printk("} "); |
| } |
| printk("\n"); |
| } |
| #endif |
| |
| if (tot_msglen == 1 || tot_msglen == 3) { |
| /* |
| * We have an easy message length to send... |
| */ |
| struct message *msg; |
| int msgnr = 0, i; |
| |
| info->scsi.phase = PHASE_SELSTEPS; |
| |
| /* load message bytes */ |
| while ((msg = msgqueue_getmsg(&info->scsi.msgs, msgnr++)) != NULL) { |
| for (i = 0; i < msg->length; i++) |
| fas216_writeb(info, REG_FF, msg->msg[i]); |
| msg->fifo = tot_msglen - (fas216_readb(info, REG_CFIS) & CFIS_CF); |
| } |
| |
| /* load command */ |
| for (i = 0; i < SCpnt->cmd_len; i++) |
| fas216_writeb(info, REG_FF, SCpnt->cmnd[i]); |
| |
| if (tot_msglen == 1) |
| fas216_cmd(info, CMD_SELECTATN); |
| else |
| fas216_cmd(info, CMD_SELECTATN3); |
| } else { |
| /* |
| * We have an unusual number of message bytes to send. |
| * Load first byte into fifo, and issue SELECT with ATN and |
| * stop steps. |
| */ |
| struct message *msg = msgqueue_getmsg(&info->scsi.msgs, 0); |
| |
| fas216_writeb(info, REG_FF, msg->msg[0]); |
| msg->fifo = 1; |
| |
| fas216_cmd(info, CMD_SELECTATNSTOP); |
| } |
| } |
| |
| /* |
| * Decide whether we need to perform a parity test on this device. |
| * Can also be used to force parity error conditions during initial |
| * information transfer phase (message out) for test purposes. |
| */ |
| static int parity_test(FAS216_Info *info, int target) |
| { |
| #if 0 |
| if (target == 3) { |
| info->device[target].parity_check = 0; |
| return 1; |
| } |
| #endif |
| return info->device[target].parity_check; |
| } |
| |
| static void fas216_start_command(FAS216_Info *info, struct scsi_cmnd *SCpnt) |
| { |
| int disconnect_ok; |
| |
| /* |
| * claim host busy |
| */ |
| info->scsi.phase = PHASE_SELECTION; |
| info->scsi.SCp = SCpnt->SCp; |
| info->SCpnt = SCpnt; |
| info->dma.transfer_type = fasdma_none; |
| |
| if (parity_test(info, SCpnt->device->id)) |
| fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0] | CNTL1_PTE); |
| else |
| fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]); |
| |
| /* |
| * Don't allow request sense commands to disconnect. |
| */ |
| disconnect_ok = SCpnt->cmnd[0] != REQUEST_SENSE && |
| info->device[SCpnt->device->id].disconnect_ok; |
| |
| /* |
| * build outgoing message bytes |
| */ |
| msgqueue_flush(&info->scsi.msgs); |
| msgqueue_addmsg(&info->scsi.msgs, 1, IDENTIFY(disconnect_ok, SCpnt->device->lun)); |
| |
| /* |
| * add tag message if required |
| */ |
| if (SCpnt->tag) |
| msgqueue_addmsg(&info->scsi.msgs, 2, SIMPLE_QUEUE_TAG, SCpnt->tag); |
| |
| do { |
| #ifdef SCSI2_SYNC |
| if ((info->device[SCpnt->device->id].sync_state == neg_wait || |
| info->device[SCpnt->device->id].sync_state == neg_complete) && |
| (SCpnt->cmnd[0] == REQUEST_SENSE || |
| SCpnt->cmnd[0] == INQUIRY)) { |
| info->device[SCpnt->device->id].sync_state = neg_inprogress; |
| msgqueue_addmsg(&info->scsi.msgs, 5, |
| EXTENDED_MESSAGE, 3, EXTENDED_SDTR, |
| 1000 / info->ifcfg.clockrate, |
| info->ifcfg.sync_max_depth); |
| break; |
| } |
| #endif |
| } while (0); |
| |
| __fas216_start_command(info, SCpnt); |
| } |
| |
| static void fas216_allocate_tag(FAS216_Info *info, struct scsi_cmnd *SCpnt) |
| { |
| #ifdef SCSI2_TAG |
| /* |
| * tagged queuing - allocate a new tag to this command |
| */ |
| if (SCpnt->device->simple_tags && SCpnt->cmnd[0] != REQUEST_SENSE && |
| SCpnt->cmnd[0] != INQUIRY) { |
| SCpnt->device->current_tag += 1; |
| if (SCpnt->device->current_tag == 0) |
| SCpnt->device->current_tag = 1; |
| SCpnt->tag = SCpnt->device->current_tag; |
| } else |
| #endif |
| set_bit(SCpnt->device->id * 8 + |
| (u8)(SCpnt->device->lun & 0x7), info->busyluns); |
| |
| info->stats.removes += 1; |
| switch (SCpnt->cmnd[0]) { |
| case WRITE_6: |
| case WRITE_10: |
| case WRITE_12: |
| info->stats.writes += 1; |
| break; |
| case READ_6: |
| case READ_10: |
| case READ_12: |
| info->stats.reads += 1; |
| break; |
| default: |
| info->stats.miscs += 1; |
| break; |
| } |
| } |
| |
| static void fas216_do_bus_device_reset(FAS216_Info *info, |
| struct scsi_cmnd *SCpnt) |
| { |
| struct message *msg; |
| |
| /* |
| * claim host busy |
| */ |
| info->scsi.phase = PHASE_SELECTION; |
| info->scsi.SCp = SCpnt->SCp; |
| info->SCpnt = SCpnt; |
| info->dma.transfer_type = fasdma_none; |
| |
| fas216_log(info, LOG_ERROR, "sending bus device reset"); |
| |
| msgqueue_flush(&info->scsi.msgs); |
| msgqueue_addmsg(&info->scsi.msgs, 1, BUS_DEVICE_RESET); |
| |
| /* following what the ESP driver says */ |
| fas216_set_stc(info, 0); |
| fas216_cmd(info, CMD_NOP | CMD_WITHDMA); |
| |
| /* flush FIFO */ |
| fas216_cmd(info, CMD_FLUSHFIFO); |
| |
| /* load bus-id and timeout */ |
| fas216_writeb(info, REG_SDID, BUSID(SCpnt->device->id)); |
| fas216_writeb(info, REG_STIM, info->ifcfg.select_timeout); |
| |
| /* synchronous transfers */ |
| fas216_set_sync(info, SCpnt->device->id); |
| |
| msg = msgqueue_getmsg(&info->scsi.msgs, 0); |
| |
| fas216_writeb(info, REG_FF, BUS_DEVICE_RESET); |
| msg->fifo = 1; |
| |
| fas216_cmd(info, CMD_SELECTATNSTOP); |
| } |
| |
| /** |
| * fas216_kick - kick a command to the interface |
| * @info: our host interface to kick |
| * |
| * Kick a command to the interface, interface should be idle. |
| * Notes: Interrupts are always disabled! |
| */ |
| static void fas216_kick(FAS216_Info *info) |
| { |
| struct scsi_cmnd *SCpnt = NULL; |
| #define TYPE_OTHER 0 |
| #define TYPE_RESET 1 |
| #define TYPE_QUEUE 2 |
| int where_from = TYPE_OTHER; |
| |
| fas216_checkmagic(info); |
| |
| /* |
| * Obtain the next command to process. |
| */ |
| do { |
| if (info->rstSCpnt) { |
| SCpnt = info->rstSCpnt; |
| /* don't remove it */ |
| where_from = TYPE_RESET; |
| break; |
| } |
| |
| if (info->reqSCpnt) { |
| SCpnt = info->reqSCpnt; |
| info->reqSCpnt = NULL; |
| break; |
| } |
| |
| if (info->origSCpnt) { |
| SCpnt = info->origSCpnt; |
| info->origSCpnt = NULL; |
| break; |
| } |
| |
| /* retrieve next command */ |
| if (!SCpnt) { |
| SCpnt = queue_remove_exclude(&info->queues.issue, |
| info->busyluns); |
| where_from = TYPE_QUEUE; |
| break; |
| } |
| } while (0); |
| |
| if (!SCpnt) { |
| /* |
| * no command pending, so enable reselection. |
| */ |
| fas216_cmd(info, CMD_ENABLESEL); |
| return; |
| } |
| |
| /* |
| * We're going to start a command, so disable reselection |
| */ |
| fas216_cmd(info, CMD_DISABLESEL); |
| |
| if (info->scsi.disconnectable && info->SCpnt) { |
| fas216_log(info, LOG_CONNECT, |
| "moved command for %d to disconnected queue", |
| info->SCpnt->device->id); |
| queue_add_cmd_tail(&info->queues.disconnected, info->SCpnt); |
| info->scsi.disconnectable = 0; |
| info->SCpnt = NULL; |
| } |
| |
| fas216_log_command(info, LOG_CONNECT | LOG_MESSAGES, SCpnt, |
| "starting"); |
| |
| switch (where_from) { |
| case TYPE_QUEUE: |
| fas216_allocate_tag(info, SCpnt); |
| case TYPE_OTHER: |
| fas216_start_command(info, SCpnt); |
| break; |
| case TYPE_RESET: |
| fas216_do_bus_device_reset(info, SCpnt); |
| break; |
| } |
| |
| fas216_log(info, LOG_CONNECT, "select: data pointers [%p, %X]", |
| info->scsi.SCp.ptr, info->scsi.SCp.this_residual); |
| |
| /* |
| * should now get either DISCONNECT or |
| * (FUNCTION DONE with BUS SERVICE) interrupt |
| */ |
| } |
| |
| /* |
| * Clean up from issuing a BUS DEVICE RESET message to a device. |
| */ |
| static void fas216_devicereset_done(FAS216_Info *info, struct scsi_cmnd *SCpnt, |
| unsigned int result) |
| { |
| fas216_log(info, LOG_ERROR, "fas216 device reset complete"); |
| |
| info->rstSCpnt = NULL; |
| info->rst_dev_status = 1; |
| wake_up(&info->eh_wait); |
| } |
| |
| /** |
| * fas216_rq_sns_done - Finish processing automatic request sense command |
| * @info: interface that completed |
| * @SCpnt: command that completed |
| * @result: driver byte of result |
| * |
| * Finish processing automatic request sense command |
| */ |
| static void fas216_rq_sns_done(FAS216_Info *info, struct scsi_cmnd *SCpnt, |
| unsigned int result) |
| { |
| fas216_log_target(info, LOG_CONNECT, SCpnt->device->id, |
| "request sense complete, result=0x%04x%02x%02x", |
| result, SCpnt->SCp.Message, SCpnt->SCp.Status); |
| |
| if (result != DID_OK || SCpnt->SCp.Status != GOOD) |
| /* |
| * Something went wrong. Make sure that we don't |
| * have valid data in the sense buffer that could |
| * confuse the higher levels. |
| */ |
| memset(SCpnt->sense_buffer, 0, sizeof(SCpnt->sense_buffer)); |
| //printk("scsi%d.%c: sense buffer: ", info->host->host_no, '0' + SCpnt->device->id); |
| //{ int i; for (i = 0; i < 32; i++) printk("%02x ", SCpnt->sense_buffer[i]); printk("\n"); } |
| /* |
| * Note that we don't set SCpnt->result, since that should |
| * reflect the status of the command that we were asked by |
| * the upper layers to process. This would have been set |
| * correctly by fas216_std_done. |
| */ |
| scsi_eh_restore_cmnd(SCpnt, &info->ses); |
| SCpnt->scsi_done(SCpnt); |
| } |
| |
| /** |
| * fas216_std_done - finish processing of standard command |
| * @info: interface that completed |
| * @SCpnt: command that completed |
| * @result: driver byte of result |
| * |
| * Finish processing of standard command |
| */ |
| static void |
| fas216_std_done(FAS216_Info *info, struct scsi_cmnd *SCpnt, unsigned int result) |
| { |
| info->stats.fins += 1; |
| |
| SCpnt->result = result << 16 | info->scsi.SCp.Message << 8 | |
| info->scsi.SCp.Status; |
| |
| fas216_log_command(info, LOG_CONNECT, SCpnt, |
| "command complete, result=0x%08x", SCpnt->result); |
| |
| /* |
| * If the driver detected an error, we're all done. |
| */ |
| if (host_byte(SCpnt->result) != DID_OK || |
| msg_byte(SCpnt->result) != COMMAND_COMPLETE) |
| goto done; |
| |
| /* |
| * If the command returned CHECK_CONDITION or COMMAND_TERMINATED |
| * status, request the sense information. |
| */ |
| if (status_byte(SCpnt->result) == CHECK_CONDITION || |
| status_byte(SCpnt->result) == COMMAND_TERMINATED) |
| goto request_sense; |
| |
| /* |
| * If the command did not complete with GOOD status, |
| * we are all done here. |
| */ |
| if (status_byte(SCpnt->result) != GOOD) |
| goto done; |
| |
| /* |
| * We have successfully completed a command. Make sure that |
| * we do not have any buffers left to transfer. The world |
| * is not perfect, and we seem to occasionally hit this. |
| * It can be indicative of a buggy driver, target or the upper |
| * levels of the SCSI code. |
| */ |
| if (info->scsi.SCp.ptr) { |
| switch (SCpnt->cmnd[0]) { |
| case INQUIRY: |
| case START_STOP: |
| case MODE_SENSE: |
| break; |
| |
| default: |
| scmd_printk(KERN_ERR, SCpnt, |
| "incomplete data transfer detected: res=%08X ptr=%p len=%X\n", |
| SCpnt->result, info->scsi.SCp.ptr, |
| info->scsi.SCp.this_residual); |
| scsi_print_command(SCpnt); |
| set_host_byte(SCpnt, DID_ERROR); |
| goto request_sense; |
| } |
| } |
| |
| done: |
| if (SCpnt->scsi_done) { |
| SCpnt->scsi_done(SCpnt); |
| return; |
| } |
| |
| panic("scsi%d.H: null scsi_done function in fas216_done", |
| info->host->host_no); |
| |
| |
| request_sense: |
| if (SCpnt->cmnd[0] == REQUEST_SENSE) |
| goto done; |
| |
| scsi_eh_prep_cmnd(SCpnt, &info->ses, NULL, 0, ~0); |
| fas216_log_target(info, LOG_CONNECT, SCpnt->device->id, |
| "requesting sense"); |
| init_SCp(SCpnt); |
| SCpnt->SCp.Message = 0; |
| SCpnt->SCp.Status = 0; |
| SCpnt->tag = 0; |
| SCpnt->host_scribble = (void *)fas216_rq_sns_done; |
| |
| /* |
| * Place this command into the high priority "request |
| * sense" slot. This will be the very next command |
| * executed, unless a target connects to us. |
| */ |
| if (info->reqSCpnt) |
| printk(KERN_WARNING "scsi%d.%c: losing request command\n", |
| info->host->host_no, '0' + SCpnt->device->id); |
| info->reqSCpnt = SCpnt; |
| } |
| |
| /** |
| * fas216_done - complete processing for current command |
| * @info: interface that completed |
| * @result: driver byte of result |
| * |
| * Complete processing for current command |
| */ |
| static void fas216_done(FAS216_Info *info, unsigned int result) |
| { |
| void (*fn)(FAS216_Info *, struct scsi_cmnd *, unsigned int); |
| struct scsi_cmnd *SCpnt; |
| unsigned long flags; |
| |
| fas216_checkmagic(info); |
| |
| if (!info->SCpnt) |
| goto no_command; |
| |
| SCpnt = info->SCpnt; |
| info->SCpnt = NULL; |
| info->scsi.phase = PHASE_IDLE; |
| |
| if (info->scsi.aborting) { |
| fas216_log(info, 0, "uncaught abort - returning DID_ABORT"); |
| result = DID_ABORT; |
| info->scsi.aborting = 0; |
| } |
| |
| /* |
| * Sanity check the completion - if we have zero bytes left |
| * to transfer, we should not have a valid pointer. |
| */ |
| if (info->scsi.SCp.ptr && info->scsi.SCp.this_residual == 0) { |
| scmd_printk(KERN_INFO, SCpnt, |
| "zero bytes left to transfer, but buffer pointer still valid: ptr=%p len=%08x\n", |
| info->scsi.SCp.ptr, info->scsi.SCp.this_residual); |
| info->scsi.SCp.ptr = NULL; |
| scsi_print_command(SCpnt); |
| } |
| |
| /* |
| * Clear down this command as completed. If we need to request |
| * the sense information, fas216_kick will re-assert the busy |
| * status. |
| */ |
| info->device[SCpnt->device->id].parity_check = 0; |
| clear_bit(SCpnt->device->id * 8 + |
| (u8)(SCpnt->device->lun & 0x7), info->busyluns); |
| |
| fn = (void (*)(FAS216_Info *, struct scsi_cmnd *, unsigned int))SCpnt->host_scribble; |
| fn(info, SCpnt, result); |
| |
| if (info->scsi.irq) { |
| spin_lock_irqsave(&info->host_lock, flags); |
| if (info->scsi.phase == PHASE_IDLE) |
| fas216_kick(info); |
| spin_unlock_irqrestore(&info->host_lock, flags); |
| } |
| return; |
| |
| no_command: |
| panic("scsi%d.H: null command in fas216_done", |
| info->host->host_no); |
| } |
| |
| /** |
| * fas216_queue_command - queue a command for adapter to process. |
| * @SCpnt: Command to queue |
| * @done: done function to call once command is complete |
| * |
| * Queue a command for adapter to process. |
| * Returns: 0 on success, else error. |
| * Notes: io_request_lock is held, interrupts are disabled. |
| */ |
| static int fas216_queue_command_lck(struct scsi_cmnd *SCpnt, |
| void (*done)(struct scsi_cmnd *)) |
| { |
| FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata; |
| int result; |
| |
| fas216_checkmagic(info); |
| |
| fas216_log_command(info, LOG_CONNECT, SCpnt, |
| "received command (%p)", SCpnt); |
| |
| SCpnt->scsi_done = done; |
| SCpnt->host_scribble = (void *)fas216_std_done; |
| SCpnt->result = 0; |
| |
| init_SCp(SCpnt); |
| |
| info->stats.queues += 1; |
| SCpnt->tag = 0; |
| |
| spin_lock(&info->host_lock); |
| |
| /* |
| * Add command into execute queue and let it complete under |
| * whatever scheme we're using. |
| */ |
| result = !queue_add_cmd_ordered(&info->queues.issue, SCpnt); |
| |
| /* |
| * If we successfully added the command, |
| * kick the interface to get it moving. |
| */ |
| if (result == 0 && info->scsi.phase == PHASE_IDLE) |
| fas216_kick(info); |
| spin_unlock(&info->host_lock); |
| |
| fas216_log_target(info, LOG_CONNECT, -1, "queue %s", |
| result ? "failure" : "success"); |
| |
| return result; |
| } |
| |
| DEF_SCSI_QCMD(fas216_queue_command) |
| |
| /** |
| * fas216_internal_done - trigger restart of a waiting thread in fas216_noqueue_command |
| * @SCpnt: Command to wake |
| * |
| * Trigger restart of a waiting thread in fas216_command |
| */ |
| static void fas216_internal_done(struct scsi_cmnd *SCpnt) |
| { |
| FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata; |
| |
| fas216_checkmagic(info); |
| |
| info->internal_done = 1; |
| } |
| |
| /** |
| * fas216_noqueue_command - process a command for the adapter. |
| * @SCpnt: Command to queue |
| * |
| * Queue a command for adapter to process. |
| * Returns: scsi result code. |
| * Notes: io_request_lock is held, interrupts are disabled. |
| */ |
| static int fas216_noqueue_command_lck(struct scsi_cmnd *SCpnt, |
| void (*done)(struct scsi_cmnd *)) |
| { |
| FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata; |
| |
| fas216_checkmagic(info); |
| |
| /* |
| * We should only be using this if we don't have an interrupt. |
| * Provide some "incentive" to use the queueing code. |
| */ |
| BUG_ON(info->scsi.irq); |
| |
| info->internal_done = 0; |
| fas216_queue_command_lck(SCpnt, fas216_internal_done); |
| |
| /* |
| * This wastes time, since we can't return until the command is |
| * complete. We can't sleep either since we may get re-entered! |
| * However, we must re-enable interrupts, or else we'll be |
| * waiting forever. |
| */ |
| spin_unlock_irq(info->host->host_lock); |
| |
| while (!info->internal_done) { |
| /* |
| * If we don't have an IRQ, then we must poll the card for |
| * it's interrupt, and use that to call this driver's |
| * interrupt routine. That way, we keep the command |
| * progressing. Maybe we can add some intelligence here |
| * and go to sleep if we know that the device is going |
| * to be some time (eg, disconnected). |
| */ |
| if (fas216_readb(info, REG_STAT) & STAT_INT) { |
| spin_lock_irq(info->host->host_lock); |
| fas216_intr(info); |
| spin_unlock_irq(info->host->host_lock); |
| } |
| } |
| |
| spin_lock_irq(info->host->host_lock); |
| |
| done(SCpnt); |
| |
| return 0; |
| } |
| |
| DEF_SCSI_QCMD(fas216_noqueue_command) |
| |
| /* |
| * Error handler timeout function. Indicate that we timed out, |
| * and wake up any error handler process so it can continue. |
| */ |
| static void fas216_eh_timer(unsigned long data) |
| { |
| FAS216_Info *info = (FAS216_Info *)data; |
| |
| fas216_log(info, LOG_ERROR, "error handling timed out\n"); |
| |
| del_timer(&info->eh_timer); |
| |
| if (info->rst_bus_status == 0) |
| info->rst_bus_status = -1; |
| if (info->rst_dev_status == 0) |
| info->rst_dev_status = -1; |
| |
| wake_up(&info->eh_wait); |
| } |
| |
| enum res_find { |
| res_failed, /* not found */ |
| res_success, /* command on issue queue */ |
| res_hw_abort /* command on disconnected dev */ |
| }; |
| |
| /** |
| * fas216_do_abort - decide how to abort a command |
| * @SCpnt: command to abort |
| * |
| * Decide how to abort a command. |
| * Returns: abort status |
| */ |
| static enum res_find fas216_find_command(FAS216_Info *info, |
| struct scsi_cmnd *SCpnt) |
| { |
| enum res_find res = res_failed; |
| |
| if (queue_remove_cmd(&info->queues.issue, SCpnt)) { |
| /* |
| * The command was on the issue queue, and has not been |
| * issued yet. We can remove the command from the queue, |
| * and acknowledge the abort. Neither the device nor the |
| * interface know about the command. |
| */ |
| printk("on issue queue "); |
| |
| res = res_success; |
| } else if (queue_remove_cmd(&info->queues.disconnected, SCpnt)) { |
| /* |
| * The command was on the disconnected queue. We must |
| * reconnect with the device if possible, and send it |
| * an abort message. |
| */ |
| printk("on disconnected queue "); |
| |
| res = res_hw_abort; |
| } else if (info->SCpnt == SCpnt) { |
| printk("executing "); |
| |
| switch (info->scsi.phase) { |
| /* |
| * If the interface is idle, and the command is 'disconnectable', |
| * then it is the same as on the disconnected queue. |
| */ |
| case PHASE_IDLE: |
| if (info->scsi.disconnectable) { |
| info->scsi.disconnectable = 0; |
| info->SCpnt = NULL; |
| res = res_hw_abort; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| } else if (info->origSCpnt == SCpnt) { |
| /* |
| * The command will be executed next, but a command |
| * is currently using the interface. This is similar to |
| * being on the issue queue, except the busylun bit has |
| * been set. |
| */ |
| info->origSCpnt = NULL; |
| clear_bit(SCpnt->device->id * 8 + |
| (u8)(SCpnt->device->lun & 0x7), info->busyluns); |
| printk("waiting for execution "); |
| res = res_success; |
| } else |
| printk("unknown "); |
| |
| return res; |
| } |
| |
| /** |
| * fas216_eh_abort - abort this command |
| * @SCpnt: command to abort |
| * |
| * Abort this command. |
| * Returns: FAILED if unable to abort |
| * Notes: io_request_lock is taken, and irqs are disabled |
| */ |
| int fas216_eh_abort(struct scsi_cmnd *SCpnt) |
| { |
| FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata; |
| int result = FAILED; |
| |
| fas216_checkmagic(info); |
| |
| info->stats.aborts += 1; |
| |
| scmd_printk(KERN_WARNING, SCpnt, "abort command\n"); |
| |
| print_debug_list(); |
| fas216_dumpstate(info); |
| |
| switch (fas216_find_command(info, SCpnt)) { |
| /* |
| * We found the command, and cleared it out. Either |
| * the command is still known to be executing on the |
| * target, or the busylun bit is not set. |
| */ |
| case res_success: |
| scmd_printk(KERN_WARNING, SCpnt, "abort %p success\n", SCpnt); |
| result = SUCCESS; |
| break; |
| |
| /* |
| * We need to reconnect to the target and send it an |
| * ABORT or ABORT_TAG message. We can only do this |
| * if the bus is free. |
| */ |
| case res_hw_abort: |
| |
| /* |
| * We are unable to abort the command for some reason. |
| */ |
| default: |
| case res_failed: |
| scmd_printk(KERN_WARNING, SCpnt, "abort %p failed\n", SCpnt); |
| break; |
| } |
| |
| return result; |
| } |
| |
| /** |
| * fas216_eh_device_reset - Reset the device associated with this command |
| * @SCpnt: command specifing device to reset |
| * |
| * Reset the device associated with this command. |
| * Returns: FAILED if unable to reset. |
| * Notes: We won't be re-entered, so we'll only have one device |
| * reset on the go at one time. |
| */ |
| int fas216_eh_device_reset(struct scsi_cmnd *SCpnt) |
| { |
| FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata; |
| unsigned long flags; |
| int i, res = FAILED, target = SCpnt->device->id; |
| |
| fas216_log(info, LOG_ERROR, "device reset for target %d", target); |
| |
| spin_lock_irqsave(&info->host_lock, flags); |
| |
| do { |
| /* |
| * If we are currently connected to a device, and |
| * it is the device we want to reset, there is |
| * nothing we can do here. Chances are it is stuck, |
| * and we need a bus reset. |
| */ |
| if (info->SCpnt && !info->scsi.disconnectable && |
| info->SCpnt->device->id == SCpnt->device->id) |
| break; |
| |
| /* |
| * We're going to be resetting this device. Remove |
| * all pending commands from the driver. By doing |
| * so, we guarantee that we won't touch the command |
| * structures except to process the reset request. |
| */ |
| queue_remove_all_target(&info->queues.issue, target); |
| queue_remove_all_target(&info->queues.disconnected, target); |
| if (info->origSCpnt && info->origSCpnt->device->id == target) |
| info->origSCpnt = NULL; |
| if (info->reqSCpnt && info->reqSCpnt->device->id == target) |
| info->reqSCpnt = NULL; |
| for (i = 0; i < 8; i++) |
| clear_bit(target * 8 + i, info->busyluns); |
| |
| /* |
| * Hijack this SCSI command structure to send |
| * a bus device reset message to this device. |
| */ |
| SCpnt->host_scribble = (void *)fas216_devicereset_done; |
| |
| info->rst_dev_status = 0; |
| info->rstSCpnt = SCpnt; |
| |
| if (info->scsi.phase == PHASE_IDLE) |
| fas216_kick(info); |
| |
| mod_timer(&info->eh_timer, jiffies + 30 * HZ); |
| spin_unlock_irqrestore(&info->host_lock, flags); |
| |
| /* |
| * Wait up to 30 seconds for the reset to complete. |
| */ |
| wait_event(info->eh_wait, info->rst_dev_status); |
| |
| del_timer_sync(&info->eh_timer); |
| spin_lock_irqsave(&info->host_lock, flags); |
| info->rstSCpnt = NULL; |
| |
| if (info->rst_dev_status == 1) |
| res = SUCCESS; |
| } while (0); |
| |
| SCpnt->host_scribble = NULL; |
| spin_unlock_irqrestore(&info->host_lock, flags); |
| |
| fas216_log(info, LOG_ERROR, "device reset complete: %s\n", |
| res == SUCCESS ? "success" : "failed"); |
| |
| return res; |
| } |
| |
| /** |
| * fas216_eh_bus_reset - Reset the bus associated with the command |
| * @SCpnt: command specifing bus to reset |
| * |
| * Reset the bus associated with the command. |
| * Returns: FAILED if unable to reset. |
| * Notes: Further commands are blocked. |
| */ |
| int fas216_eh_bus_reset(struct scsi_cmnd *SCpnt) |
| { |
| FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata; |
| unsigned long flags; |
| struct scsi_device *SDpnt; |
| |
| fas216_checkmagic(info); |
| fas216_log(info, LOG_ERROR, "resetting bus"); |
| |
| info->stats.bus_resets += 1; |
| |
| spin_lock_irqsave(&info->host_lock, flags); |
| |
| /* |
| * Stop all activity on this interface. |
| */ |
| fas216_aborttransfer(info); |
| fas216_writeb(info, REG_CNTL3, info->scsi.cfg[2]); |
| |
| /* |
| * Clear any pending interrupts. |
| */ |
| while (fas216_readb(info, REG_STAT) & STAT_INT) |
| fas216_readb(info, REG_INST); |
| |
| info->rst_bus_status = 0; |
| |
| /* |
| * For each attached hard-reset device, clear out |
| * all command structures. Leave the running |
| * command in place. |
| */ |
| shost_for_each_device(SDpnt, info->host) { |
| int i; |
| |
| if (SDpnt->soft_reset) |
| continue; |
| |
| queue_remove_all_target(&info->queues.issue, SDpnt->id); |
| queue_remove_all_target(&info->queues.disconnected, SDpnt->id); |
| if (info->origSCpnt && info->origSCpnt->device->id == SDpnt->id) |
| info->origSCpnt = NULL; |
| if (info->reqSCpnt && info->reqSCpnt->device->id == SDpnt->id) |
| info->reqSCpnt = NULL; |
| info->SCpnt = NULL; |
| |
| for (i = 0; i < 8; i++) |
| clear_bit(SDpnt->id * 8 + i, info->busyluns); |
| } |
| |
| info->scsi.phase = PHASE_IDLE; |
| |
| /* |
| * Reset the SCSI bus. Device cleanup happens in |
| * the interrupt handler. |
| */ |
| fas216_cmd(info, CMD_RESETSCSI); |
| |
| mod_timer(&info->eh_timer, jiffies + HZ); |
| spin_unlock_irqrestore(&info->host_lock, flags); |
| |
| /* |
| * Wait one second for the interrupt. |
| */ |
| wait_event(info->eh_wait, info->rst_bus_status); |
| del_timer_sync(&info->eh_timer); |
| |
| fas216_log(info, LOG_ERROR, "bus reset complete: %s\n", |
| info->rst_bus_status == 1 ? "success" : "failed"); |
| |
| return info->rst_bus_status == 1 ? SUCCESS : FAILED; |
| } |
| |
| /** |
| * fas216_init_chip - Initialise FAS216 state after reset |
| * @info: state structure for interface |
| * |
| * Initialise FAS216 state after reset |
| */ |
| static void fas216_init_chip(FAS216_Info *info) |
| { |
| unsigned int clock = ((info->ifcfg.clockrate - 1) / 5 + 1) & 7; |
| fas216_writeb(info, REG_CLKF, clock); |
| fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]); |
| fas216_writeb(info, REG_CNTL2, info->scsi.cfg[1]); |
| fas216_writeb(info, REG_CNTL3, info->scsi.cfg[2]); |
| fas216_writeb(info, REG_STIM, info->ifcfg.select_timeout); |
| fas216_writeb(info, REG_SOF, 0); |
| fas216_writeb(info, REG_STP, info->scsi.async_stp); |
| fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]); |
| } |
| |
| /** |
| * fas216_eh_host_reset - Reset the host associated with this command |
| * @SCpnt: command specifing host to reset |
| * |
| * Reset the host associated with this command. |
| * Returns: FAILED if unable to reset. |
| * Notes: io_request_lock is taken, and irqs are disabled |
| */ |
| int fas216_eh_host_reset(struct scsi_cmnd *SCpnt) |
| { |
| FAS216_Info *info = (FAS216_Info *)SCpnt->device->host->hostdata; |
| |
| spin_lock_irq(info->host->host_lock); |
| |
| fas216_checkmagic(info); |
| |
| fas216_log(info, LOG_ERROR, "resetting host"); |
| |
| /* |
| * Reset the SCSI chip. |
| */ |
| fas216_cmd(info, CMD_RESETCHIP); |
| |
| /* |
| * Ugly ugly ugly! |
| * We need to release the host_lock and enable |
| * IRQs if we sleep, but we must relock and disable |
| * IRQs after the sleep. |
| */ |
| spin_unlock_irq(info->host->host_lock); |
| msleep(50 * 1000/100); |
| spin_lock_irq(info->host->host_lock); |
| |
| /* |
| * Release the SCSI reset. |
| */ |
| fas216_cmd(info, CMD_NOP); |
| |
| fas216_init_chip(info); |
| |
| spin_unlock_irq(info->host->host_lock); |
| return SUCCESS; |
| } |
| |
| #define TYPE_UNKNOWN 0 |
| #define TYPE_NCR53C90 1 |
| #define TYPE_NCR53C90A 2 |
| #define TYPE_NCR53C9x 3 |
| #define TYPE_Am53CF94 4 |
| #define TYPE_EmFAS216 5 |
| #define TYPE_QLFAS216 6 |
| |
| static char *chip_types[] = { |
| "unknown", |
| "NS NCR53C90", |
| "NS NCR53C90A", |
| "NS NCR53C9x", |
| "AMD Am53CF94", |
| "Emulex FAS216", |
| "QLogic FAS216" |
| }; |
| |
| static int fas216_detect_type(FAS216_Info *info) |
| { |
| int family, rev; |
| |
| /* |
| * Reset the chip. |
| */ |
| fas216_writeb(info, REG_CMD, CMD_RESETCHIP); |
| udelay(50); |
| fas216_writeb(info, REG_CMD, CMD_NOP); |
| |
| /* |
| * Check to see if control reg 2 is present. |
| */ |
| fas216_writeb(info, REG_CNTL3, 0); |
| fas216_writeb(info, REG_CNTL2, CNTL2_S2FE); |
| |
| /* |
| * If we are unable to read back control reg 2 |
| * correctly, it is not present, and we have a |
| * NCR53C90. |
| */ |
| if ((fas216_readb(info, REG_CNTL2) & (~0xe0)) != CNTL2_S2FE) |
| return TYPE_NCR53C90; |
| |
| /* |
| * Now, check control register 3 |
| */ |
| fas216_writeb(info, REG_CNTL2, 0); |
| fas216_writeb(info, REG_CNTL3, 0); |
| fas216_writeb(info, REG_CNTL3, 5); |
| |
| /* |
| * If we are unable to read the register back |
| * correctly, we have a NCR53C90A |
| */ |
| if (fas216_readb(info, REG_CNTL3) != 5) |
| return TYPE_NCR53C90A; |
| |
| /* |
| * Now read the ID from the chip. |
| */ |
| fas216_writeb(info, REG_CNTL3, 0); |
| |
| fas216_writeb(info, REG_CNTL3, CNTL3_ADIDCHK); |
| fas216_writeb(info, REG_CNTL3, 0); |
| |
| fas216_writeb(info, REG_CMD, CMD_RESETCHIP); |
| udelay(50); |
| fas216_writeb(info, REG_CMD, CMD_WITHDMA | CMD_NOP); |
| |
| fas216_writeb(info, REG_CNTL2, CNTL2_ENF); |
| fas216_writeb(info, REG_CMD, CMD_RESETCHIP); |
| udelay(50); |
| fas216_writeb(info, REG_CMD, CMD_NOP); |
| |
| rev = fas216_readb(info, REG_ID); |
| family = rev >> 3; |
| rev &= 7; |
| |
| switch (family) { |
| case 0x01: |
| if (rev == 4) |
| return TYPE_Am53CF94; |
| break; |
| |
| case 0x02: |
| switch (rev) { |
| case 2: |
| return TYPE_EmFAS216; |
| case 3: |
| return TYPE_QLFAS216; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| printk("family %x rev %x\n", family, rev); |
| return TYPE_NCR53C9x; |
| } |
| |
| /** |
| * fas216_reset_state - Initialise driver internal state |
| * @info: state to initialise |
| * |
| * Initialise driver internal state |
| */ |
| static void fas216_reset_state(FAS216_Info *info) |
| { |
| int i; |
| |
| fas216_checkmagic(info); |
| |
| fas216_bus_reset(info); |
| |
| /* |
| * Clear out all stale info in our state structure |
| */ |
| memset(info->busyluns, 0, sizeof(info->busyluns)); |
| info->scsi.disconnectable = 0; |
| info->scsi.aborting = 0; |
| |
| for (i = 0; i < 8; i++) { |
| info->device[i].parity_enabled = 0; |
| info->device[i].parity_check = 1; |
| } |
| |
| /* |
| * Drain all commands on disconnected queue |
| */ |
| while (queue_remove(&info->queues.disconnected) != NULL); |
| |
| /* |
| * Remove executing commands. |
| */ |
| info->SCpnt = NULL; |
| info->reqSCpnt = NULL; |
| info->rstSCpnt = NULL; |
| info->origSCpnt = NULL; |
| } |
| |
| /** |
| * fas216_init - initialise FAS/NCR/AMD SCSI structures. |
| * @host: a driver-specific filled-out structure |
| * |
| * Initialise FAS/NCR/AMD SCSI structures. |
| * Returns: 0 on success |
| */ |
| int fas216_init(struct Scsi_Host *host) |
| { |
| FAS216_Info *info = (FAS216_Info *)host->hostdata; |
| |
| info->magic_start = MAGIC; |
| info->magic_end = MAGIC; |
| info->host = host; |
| info->scsi.cfg[0] = host->this_id | CNTL1_PERE; |
| info->scsi.cfg[1] = CNTL2_ENF | CNTL2_S2FE; |
| info->scsi.cfg[2] = info->ifcfg.cntl3 | |
| CNTL3_ADIDCHK | CNTL3_QTAG | CNTL3_G2CB | CNTL3_LBTM; |
| info->scsi.async_stp = fas216_syncperiod(info, info->ifcfg.asyncperiod); |
| |
| info->rst_dev_status = -1; |
| info->rst_bus_status = -1; |
| init_waitqueue_head(&info->eh_wait); |
| init_timer(&info->eh_timer); |
| info->eh_timer.data = (unsigned long)info; |
| info->eh_timer.function = fas216_eh_timer; |
| |
| spin_lock_init(&info->host_lock); |
| |
| memset(&info->stats, 0, sizeof(info->stats)); |
| |
| msgqueue_initialise(&info->scsi.msgs); |
| |
| if (!queue_initialise(&info->queues.issue)) |
| return -ENOMEM; |
| |
| if (!queue_initialise(&info->queues.disconnected)) { |
| queue_free(&info->queues.issue); |
| return -ENOMEM; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * fas216_add - initialise FAS/NCR/AMD SCSI ic. |
| * @host: a driver-specific filled-out structure |
| * @dev: parent device |
| * |
| * Initialise FAS/NCR/AMD SCSI ic. |
| * Returns: 0 on success |
| */ |
| int fas216_add(struct Scsi_Host *host, struct device *dev) |
| { |
| FAS216_Info *info = (FAS216_Info *)host->hostdata; |
| int type, ret; |
| |
| if (info->ifcfg.clockrate <= 10 || info->ifcfg.clockrate > 40) { |
| printk(KERN_CRIT "fas216: invalid clock rate %u MHz\n", |
| info->ifcfg.clockrate); |
| return -EINVAL; |
| } |
| |
| fas216_reset_state(info); |
| type = fas216_detect_type(info); |
| info->scsi.type = chip_types[type]; |
| |
| udelay(300); |
| |
| /* |
| * Initialise the chip correctly. |
| */ |
| fas216_init_chip(info); |
| |
| /* |
| * Reset the SCSI bus. We don't want to see |
| * the resulting reset interrupt, so mask it |
| * out. |
| */ |
| fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0] | CNTL1_DISR); |
| fas216_writeb(info, REG_CMD, CMD_RESETSCSI); |
| |
| /* |
| * scsi standard says wait 250ms |
| */ |
| spin_unlock_irq(info->host->host_lock); |
| msleep(100*1000/100); |
| spin_lock_irq(info->host->host_lock); |
| |
| fas216_writeb(info, REG_CNTL1, info->scsi.cfg[0]); |
| fas216_readb(info, REG_INST); |
| |
| fas216_checkmagic(info); |
| |
| ret = scsi_add_host(host, dev); |
| if (ret) |
| fas216_writeb(info, REG_CMD, CMD_RESETCHIP); |
| else |
| scsi_scan_host(host); |
| |
| return ret; |
| } |
| |
| void fas216_remove(struct Scsi_Host *host) |
| { |
| FAS216_Info *info = (FAS216_Info *)host->hostdata; |
| |
| fas216_checkmagic(info); |
| scsi_remove_host(host); |
| |
| fas216_writeb(info, REG_CMD, CMD_RESETCHIP); |
| scsi_host_put(host); |
| } |
| |
| /** |
| * fas216_release - release all resources for FAS/NCR/AMD SCSI ic. |
| * @host: a driver-specific filled-out structure |
| * |
| * release all resources and put everything to bed for FAS/NCR/AMD SCSI ic. |
| */ |
| void fas216_release(struct Scsi_Host *host) |
| { |
| FAS216_Info *info = (FAS216_Info *)host->hostdata; |
| |
| queue_free(&info->queues.disconnected); |
| queue_free(&info->queues.issue); |
| } |
| |
| void fas216_print_host(FAS216_Info *info, struct seq_file *m) |
| { |
| seq_printf(m, |
| "\n" |
| "Chip : %s\n" |
| " Address: 0x%p\n" |
| " IRQ : %d\n" |
| " DMA : %d\n", |
| info->scsi.type, info->scsi.io_base, |
| info->scsi.irq, info->scsi.dma); |
| } |
| |
| void fas216_print_stats(FAS216_Info *info, struct seq_file *m) |
| { |
| seq_printf(m, "\n" |
| "Command Statistics:\n" |
| " Queued : %u\n" |
| " Issued : %u\n" |
| " Completed : %u\n" |
| " Reads : %u\n" |
| " Writes : %u\n" |
| " Others : %u\n" |
| " Disconnects: %u\n" |
| " Aborts : %u\n" |
| " Bus resets : %u\n" |
| " Host resets: %u\n", |
| info->stats.queues, info->stats.removes, |
| info->stats.fins, info->stats.reads, |
| info->stats.writes, info->stats.miscs, |
| info->stats.disconnects, info->stats.aborts, |
| info->stats.bus_resets, info->stats.host_resets); |
| } |
| |
| void fas216_print_devices(FAS216_Info *info, struct seq_file *m) |
| { |
| struct fas216_device *dev; |
| struct scsi_device *scd; |
| |
| seq_printf(m, "Device/Lun TaggedQ Parity Sync\n"); |
| |
| shost_for_each_device(scd, info->host) { |
| dev = &info->device[scd->id]; |
| seq_printf(m, " %d/%llu ", scd->id, scd->lun); |
| if (scd->tagged_supported) |
| seq_printf(m, "%3sabled(%3d) ", |
| scd->simple_tags ? "en" : "dis", |
| scd->current_tag); |
| else |
| seq_printf(m, "unsupported "); |
| |
| seq_printf(m, "%3sabled ", dev->parity_enabled ? "en" : "dis"); |
| |
| if (dev->sof) |
| seq_printf(m, "offset %d, %d ns\n", |
| dev->sof, dev->period * 4); |
| else |
| seq_printf(m, "async\n"); |
| } |
| } |
| |
| EXPORT_SYMBOL(fas216_init); |
| EXPORT_SYMBOL(fas216_add); |
| EXPORT_SYMBOL(fas216_queue_command); |
| EXPORT_SYMBOL(fas216_noqueue_command); |
| EXPORT_SYMBOL(fas216_intr); |
| EXPORT_SYMBOL(fas216_remove); |
| EXPORT_SYMBOL(fas216_release); |
| EXPORT_SYMBOL(fas216_eh_abort); |
| EXPORT_SYMBOL(fas216_eh_device_reset); |
| EXPORT_SYMBOL(fas216_eh_bus_reset); |
| EXPORT_SYMBOL(fas216_eh_host_reset); |
| EXPORT_SYMBOL(fas216_print_host); |
| EXPORT_SYMBOL(fas216_print_stats); |
| EXPORT_SYMBOL(fas216_print_devices); |
| |
| MODULE_AUTHOR("Russell King"); |
| MODULE_DESCRIPTION("Generic FAS216/NCR53C9x driver core"); |
| MODULE_LICENSE("GPL"); |