| /* esp_scsi.c: ESP SCSI driver. |
| * |
| * Copyright (C) 2007 David S. Miller (davem@davemloft.net) |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/slab.h> |
| #include <linux/delay.h> |
| #include <linux/list.h> |
| #include <linux/completion.h> |
| #include <linux/kallsyms.h> |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/init.h> |
| #include <linux/irqreturn.h> |
| |
| #include <asm/irq.h> |
| #include <asm/io.h> |
| #include <asm/dma.h> |
| |
| #include <scsi/scsi.h> |
| #include <scsi/scsi_host.h> |
| #include <scsi/scsi_cmnd.h> |
| #include <scsi/scsi_device.h> |
| #include <scsi/scsi_tcq.h> |
| #include <scsi/scsi_dbg.h> |
| #include <scsi/scsi_transport_spi.h> |
| |
| #include "esp_scsi.h" |
| |
| #define DRV_MODULE_NAME "esp" |
| #define PFX DRV_MODULE_NAME ": " |
| #define DRV_VERSION "2.000" |
| #define DRV_MODULE_RELDATE "April 19, 2007" |
| |
| /* SCSI bus reset settle time in seconds. */ |
| static int esp_bus_reset_settle = 3; |
| |
| static u32 esp_debug; |
| #define ESP_DEBUG_INTR 0x00000001 |
| #define ESP_DEBUG_SCSICMD 0x00000002 |
| #define ESP_DEBUG_RESET 0x00000004 |
| #define ESP_DEBUG_MSGIN 0x00000008 |
| #define ESP_DEBUG_MSGOUT 0x00000010 |
| #define ESP_DEBUG_CMDDONE 0x00000020 |
| #define ESP_DEBUG_DISCONNECT 0x00000040 |
| #define ESP_DEBUG_DATASTART 0x00000080 |
| #define ESP_DEBUG_DATADONE 0x00000100 |
| #define ESP_DEBUG_RECONNECT 0x00000200 |
| #define ESP_DEBUG_AUTOSENSE 0x00000400 |
| |
| #define esp_log_intr(f, a...) \ |
| do { if (esp_debug & ESP_DEBUG_INTR) \ |
| printk(f, ## a); \ |
| } while (0) |
| |
| #define esp_log_reset(f, a...) \ |
| do { if (esp_debug & ESP_DEBUG_RESET) \ |
| printk(f, ## a); \ |
| } while (0) |
| |
| #define esp_log_msgin(f, a...) \ |
| do { if (esp_debug & ESP_DEBUG_MSGIN) \ |
| printk(f, ## a); \ |
| } while (0) |
| |
| #define esp_log_msgout(f, a...) \ |
| do { if (esp_debug & ESP_DEBUG_MSGOUT) \ |
| printk(f, ## a); \ |
| } while (0) |
| |
| #define esp_log_cmddone(f, a...) \ |
| do { if (esp_debug & ESP_DEBUG_CMDDONE) \ |
| printk(f, ## a); \ |
| } while (0) |
| |
| #define esp_log_disconnect(f, a...) \ |
| do { if (esp_debug & ESP_DEBUG_DISCONNECT) \ |
| printk(f, ## a); \ |
| } while (0) |
| |
| #define esp_log_datastart(f, a...) \ |
| do { if (esp_debug & ESP_DEBUG_DATASTART) \ |
| printk(f, ## a); \ |
| } while (0) |
| |
| #define esp_log_datadone(f, a...) \ |
| do { if (esp_debug & ESP_DEBUG_DATADONE) \ |
| printk(f, ## a); \ |
| } while (0) |
| |
| #define esp_log_reconnect(f, a...) \ |
| do { if (esp_debug & ESP_DEBUG_RECONNECT) \ |
| printk(f, ## a); \ |
| } while (0) |
| |
| #define esp_log_autosense(f, a...) \ |
| do { if (esp_debug & ESP_DEBUG_AUTOSENSE) \ |
| printk(f, ## a); \ |
| } while (0) |
| |
| #define esp_read8(REG) esp->ops->esp_read8(esp, REG) |
| #define esp_write8(VAL,REG) esp->ops->esp_write8(esp, VAL, REG) |
| |
| static void esp_log_fill_regs(struct esp *esp, |
| struct esp_event_ent *p) |
| { |
| p->sreg = esp->sreg; |
| p->seqreg = esp->seqreg; |
| p->sreg2 = esp->sreg2; |
| p->ireg = esp->ireg; |
| p->select_state = esp->select_state; |
| p->event = esp->event; |
| } |
| |
| void scsi_esp_cmd(struct esp *esp, u8 val) |
| { |
| struct esp_event_ent *p; |
| int idx = esp->esp_event_cur; |
| |
| p = &esp->esp_event_log[idx]; |
| p->type = ESP_EVENT_TYPE_CMD; |
| p->val = val; |
| esp_log_fill_regs(esp, p); |
| |
| esp->esp_event_cur = (idx + 1) & (ESP_EVENT_LOG_SZ - 1); |
| |
| esp_write8(val, ESP_CMD); |
| } |
| EXPORT_SYMBOL(scsi_esp_cmd); |
| |
| static void esp_event(struct esp *esp, u8 val) |
| { |
| struct esp_event_ent *p; |
| int idx = esp->esp_event_cur; |
| |
| p = &esp->esp_event_log[idx]; |
| p->type = ESP_EVENT_TYPE_EVENT; |
| p->val = val; |
| esp_log_fill_regs(esp, p); |
| |
| esp->esp_event_cur = (idx + 1) & (ESP_EVENT_LOG_SZ - 1); |
| |
| esp->event = val; |
| } |
| |
| static void esp_dump_cmd_log(struct esp *esp) |
| { |
| int idx = esp->esp_event_cur; |
| int stop = idx; |
| |
| printk(KERN_INFO PFX "esp%d: Dumping command log\n", |
| esp->host->unique_id); |
| do { |
| struct esp_event_ent *p = &esp->esp_event_log[idx]; |
| |
| printk(KERN_INFO PFX "esp%d: ent[%d] %s ", |
| esp->host->unique_id, idx, |
| p->type == ESP_EVENT_TYPE_CMD ? "CMD" : "EVENT"); |
| |
| printk("val[%02x] sreg[%02x] seqreg[%02x] " |
| "sreg2[%02x] ireg[%02x] ss[%02x] event[%02x]\n", |
| p->val, p->sreg, p->seqreg, |
| p->sreg2, p->ireg, p->select_state, p->event); |
| |
| idx = (idx + 1) & (ESP_EVENT_LOG_SZ - 1); |
| } while (idx != stop); |
| } |
| |
| static void esp_flush_fifo(struct esp *esp) |
| { |
| scsi_esp_cmd(esp, ESP_CMD_FLUSH); |
| if (esp->rev == ESP236) { |
| int lim = 1000; |
| |
| while (esp_read8(ESP_FFLAGS) & ESP_FF_FBYTES) { |
| if (--lim == 0) { |
| printk(KERN_ALERT PFX "esp%d: ESP_FF_BYTES " |
| "will not clear!\n", |
| esp->host->unique_id); |
| break; |
| } |
| udelay(1); |
| } |
| } |
| } |
| |
| static void hme_read_fifo(struct esp *esp) |
| { |
| int fcnt = esp_read8(ESP_FFLAGS) & ESP_FF_FBYTES; |
| int idx = 0; |
| |
| while (fcnt--) { |
| esp->fifo[idx++] = esp_read8(ESP_FDATA); |
| esp->fifo[idx++] = esp_read8(ESP_FDATA); |
| } |
| if (esp->sreg2 & ESP_STAT2_F1BYTE) { |
| esp_write8(0, ESP_FDATA); |
| esp->fifo[idx++] = esp_read8(ESP_FDATA); |
| scsi_esp_cmd(esp, ESP_CMD_FLUSH); |
| } |
| esp->fifo_cnt = idx; |
| } |
| |
| static void esp_set_all_config3(struct esp *esp, u8 val) |
| { |
| int i; |
| |
| for (i = 0; i < ESP_MAX_TARGET; i++) |
| esp->target[i].esp_config3 = val; |
| } |
| |
| /* Reset the ESP chip, _not_ the SCSI bus. */ |
| static void esp_reset_esp(struct esp *esp) |
| { |
| u8 family_code, version; |
| |
| /* Now reset the ESP chip */ |
| scsi_esp_cmd(esp, ESP_CMD_RC); |
| scsi_esp_cmd(esp, ESP_CMD_NULL | ESP_CMD_DMA); |
| if (esp->rev == FAST) |
| esp_write8(ESP_CONFIG2_FENAB, ESP_CFG2); |
| scsi_esp_cmd(esp, ESP_CMD_NULL | ESP_CMD_DMA); |
| |
| /* This is the only point at which it is reliable to read |
| * the ID-code for a fast ESP chip variants. |
| */ |
| esp->max_period = ((35 * esp->ccycle) / 1000); |
| if (esp->rev == FAST) { |
| version = esp_read8(ESP_UID); |
| family_code = (version & 0xf8) >> 3; |
| if (family_code == 0x02) |
| esp->rev = FAS236; |
| else if (family_code == 0x0a) |
| esp->rev = FASHME; /* Version is usually '5'. */ |
| else |
| esp->rev = FAS100A; |
| esp->min_period = ((4 * esp->ccycle) / 1000); |
| } else { |
| esp->min_period = ((5 * esp->ccycle) / 1000); |
| } |
| esp->max_period = (esp->max_period + 3)>>2; |
| esp->min_period = (esp->min_period + 3)>>2; |
| |
| esp_write8(esp->config1, ESP_CFG1); |
| switch (esp->rev) { |
| case ESP100: |
| /* nothing to do */ |
| break; |
| |
| case ESP100A: |
| esp_write8(esp->config2, ESP_CFG2); |
| break; |
| |
| case ESP236: |
| /* Slow 236 */ |
| esp_write8(esp->config2, ESP_CFG2); |
| esp->prev_cfg3 = esp->target[0].esp_config3; |
| esp_write8(esp->prev_cfg3, ESP_CFG3); |
| break; |
| |
| case FASHME: |
| esp->config2 |= (ESP_CONFIG2_HME32 | ESP_CONFIG2_HMEFENAB); |
| /* fallthrough... */ |
| |
| case FAS236: |
| /* Fast 236 or HME */ |
| esp_write8(esp->config2, ESP_CFG2); |
| if (esp->rev == FASHME) { |
| u8 cfg3 = esp->target[0].esp_config3; |
| |
| cfg3 |= ESP_CONFIG3_FCLOCK | ESP_CONFIG3_OBPUSH; |
| if (esp->scsi_id >= 8) |
| cfg3 |= ESP_CONFIG3_IDBIT3; |
| esp_set_all_config3(esp, cfg3); |
| } else { |
| u32 cfg3 = esp->target[0].esp_config3; |
| |
| cfg3 |= ESP_CONFIG3_FCLK; |
| esp_set_all_config3(esp, cfg3); |
| } |
| esp->prev_cfg3 = esp->target[0].esp_config3; |
| esp_write8(esp->prev_cfg3, ESP_CFG3); |
| if (esp->rev == FASHME) { |
| esp->radelay = 80; |
| } else { |
| if (esp->flags & ESP_FLAG_DIFFERENTIAL) |
| esp->radelay = 0; |
| else |
| esp->radelay = 96; |
| } |
| break; |
| |
| case FAS100A: |
| /* Fast 100a */ |
| esp_write8(esp->config2, ESP_CFG2); |
| esp_set_all_config3(esp, |
| (esp->target[0].esp_config3 | |
| ESP_CONFIG3_FCLOCK)); |
| esp->prev_cfg3 = esp->target[0].esp_config3; |
| esp_write8(esp->prev_cfg3, ESP_CFG3); |
| esp->radelay = 32; |
| break; |
| |
| default: |
| break; |
| } |
| |
| /* Reload the configuration registers */ |
| esp_write8(esp->cfact, ESP_CFACT); |
| |
| esp->prev_stp = 0; |
| esp_write8(esp->prev_stp, ESP_STP); |
| |
| esp->prev_soff = 0; |
| esp_write8(esp->prev_soff, ESP_SOFF); |
| |
| esp_write8(esp->neg_defp, ESP_TIMEO); |
| |
| /* Eat any bitrot in the chip */ |
| esp_read8(ESP_INTRPT); |
| udelay(100); |
| } |
| |
| static void esp_map_dma(struct esp *esp, struct scsi_cmnd *cmd) |
| { |
| struct esp_cmd_priv *spriv = ESP_CMD_PRIV(cmd); |
| struct scatterlist *sg = scsi_sglist(cmd); |
| int dir = cmd->sc_data_direction; |
| int total, i; |
| |
| if (dir == DMA_NONE) |
| return; |
| |
| spriv->u.num_sg = esp->ops->map_sg(esp, sg, scsi_sg_count(cmd), dir); |
| spriv->cur_residue = sg_dma_len(sg); |
| spriv->cur_sg = sg; |
| |
| total = 0; |
| for (i = 0; i < spriv->u.num_sg; i++) |
| total += sg_dma_len(&sg[i]); |
| spriv->tot_residue = total; |
| } |
| |
| static dma_addr_t esp_cur_dma_addr(struct esp_cmd_entry *ent, |
| struct scsi_cmnd *cmd) |
| { |
| struct esp_cmd_priv *p = ESP_CMD_PRIV(cmd); |
| |
| if (ent->flags & ESP_CMD_FLAG_AUTOSENSE) { |
| return ent->sense_dma + |
| (ent->sense_ptr - cmd->sense_buffer); |
| } |
| |
| return sg_dma_address(p->cur_sg) + |
| (sg_dma_len(p->cur_sg) - |
| p->cur_residue); |
| } |
| |
| static unsigned int esp_cur_dma_len(struct esp_cmd_entry *ent, |
| struct scsi_cmnd *cmd) |
| { |
| struct esp_cmd_priv *p = ESP_CMD_PRIV(cmd); |
| |
| if (ent->flags & ESP_CMD_FLAG_AUTOSENSE) { |
| return SCSI_SENSE_BUFFERSIZE - |
| (ent->sense_ptr - cmd->sense_buffer); |
| } |
| return p->cur_residue; |
| } |
| |
| static void esp_advance_dma(struct esp *esp, struct esp_cmd_entry *ent, |
| struct scsi_cmnd *cmd, unsigned int len) |
| { |
| struct esp_cmd_priv *p = ESP_CMD_PRIV(cmd); |
| |
| if (ent->flags & ESP_CMD_FLAG_AUTOSENSE) { |
| ent->sense_ptr += len; |
| return; |
| } |
| |
| p->cur_residue -= len; |
| p->tot_residue -= len; |
| if (p->cur_residue < 0 || p->tot_residue < 0) { |
| printk(KERN_ERR PFX "esp%d: Data transfer overflow.\n", |
| esp->host->unique_id); |
| printk(KERN_ERR PFX "esp%d: cur_residue[%d] tot_residue[%d] " |
| "len[%u]\n", |
| esp->host->unique_id, |
| p->cur_residue, p->tot_residue, len); |
| p->cur_residue = 0; |
| p->tot_residue = 0; |
| } |
| if (!p->cur_residue && p->tot_residue) { |
| p->cur_sg++; |
| p->cur_residue = sg_dma_len(p->cur_sg); |
| } |
| } |
| |
| static void esp_unmap_dma(struct esp *esp, struct scsi_cmnd *cmd) |
| { |
| struct esp_cmd_priv *spriv = ESP_CMD_PRIV(cmd); |
| int dir = cmd->sc_data_direction; |
| |
| if (dir == DMA_NONE) |
| return; |
| |
| esp->ops->unmap_sg(esp, scsi_sglist(cmd), spriv->u.num_sg, dir); |
| } |
| |
| static void esp_save_pointers(struct esp *esp, struct esp_cmd_entry *ent) |
| { |
| struct scsi_cmnd *cmd = ent->cmd; |
| struct esp_cmd_priv *spriv = ESP_CMD_PRIV(cmd); |
| |
| if (ent->flags & ESP_CMD_FLAG_AUTOSENSE) { |
| ent->saved_sense_ptr = ent->sense_ptr; |
| return; |
| } |
| ent->saved_cur_residue = spriv->cur_residue; |
| ent->saved_cur_sg = spriv->cur_sg; |
| ent->saved_tot_residue = spriv->tot_residue; |
| } |
| |
| static void esp_restore_pointers(struct esp *esp, struct esp_cmd_entry *ent) |
| { |
| struct scsi_cmnd *cmd = ent->cmd; |
| struct esp_cmd_priv *spriv = ESP_CMD_PRIV(cmd); |
| |
| if (ent->flags & ESP_CMD_FLAG_AUTOSENSE) { |
| ent->sense_ptr = ent->saved_sense_ptr; |
| return; |
| } |
| spriv->cur_residue = ent->saved_cur_residue; |
| spriv->cur_sg = ent->saved_cur_sg; |
| spriv->tot_residue = ent->saved_tot_residue; |
| } |
| |
| static void esp_check_command_len(struct esp *esp, struct scsi_cmnd *cmd) |
| { |
| if (cmd->cmd_len == 6 || |
| cmd->cmd_len == 10 || |
| cmd->cmd_len == 12) { |
| esp->flags &= ~ESP_FLAG_DOING_SLOWCMD; |
| } else { |
| esp->flags |= ESP_FLAG_DOING_SLOWCMD; |
| } |
| } |
| |
| static void esp_write_tgt_config3(struct esp *esp, int tgt) |
| { |
| if (esp->rev > ESP100A) { |
| u8 val = esp->target[tgt].esp_config3; |
| |
| if (val != esp->prev_cfg3) { |
| esp->prev_cfg3 = val; |
| esp_write8(val, ESP_CFG3); |
| } |
| } |
| } |
| |
| static void esp_write_tgt_sync(struct esp *esp, int tgt) |
| { |
| u8 off = esp->target[tgt].esp_offset; |
| u8 per = esp->target[tgt].esp_period; |
| |
| if (off != esp->prev_soff) { |
| esp->prev_soff = off; |
| esp_write8(off, ESP_SOFF); |
| } |
| if (per != esp->prev_stp) { |
| esp->prev_stp = per; |
| esp_write8(per, ESP_STP); |
| } |
| } |
| |
| static u32 esp_dma_length_limit(struct esp *esp, u32 dma_addr, u32 dma_len) |
| { |
| if (esp->rev == FASHME) { |
| /* Arbitrary segment boundaries, 24-bit counts. */ |
| if (dma_len > (1U << 24)) |
| dma_len = (1U << 24); |
| } else { |
| u32 base, end; |
| |
| /* ESP chip limits other variants by 16-bits of transfer |
| * count. Actually on FAS100A and FAS236 we could get |
| * 24-bits of transfer count by enabling ESP_CONFIG2_FENAB |
| * in the ESP_CFG2 register but that causes other unwanted |
| * changes so we don't use it currently. |
| */ |
| if (dma_len > (1U << 16)) |
| dma_len = (1U << 16); |
| |
| /* All of the DMA variants hooked up to these chips |
| * cannot handle crossing a 24-bit address boundary. |
| */ |
| base = dma_addr & ((1U << 24) - 1U); |
| end = base + dma_len; |
| if (end > (1U << 24)) |
| end = (1U <<24); |
| dma_len = end - base; |
| } |
| return dma_len; |
| } |
| |
| static int esp_need_to_nego_wide(struct esp_target_data *tp) |
| { |
| struct scsi_target *target = tp->starget; |
| |
| return spi_width(target) != tp->nego_goal_width; |
| } |
| |
| static int esp_need_to_nego_sync(struct esp_target_data *tp) |
| { |
| struct scsi_target *target = tp->starget; |
| |
| /* When offset is zero, period is "don't care". */ |
| if (!spi_offset(target) && !tp->nego_goal_offset) |
| return 0; |
| |
| if (spi_offset(target) == tp->nego_goal_offset && |
| spi_period(target) == tp->nego_goal_period) |
| return 0; |
| |
| return 1; |
| } |
| |
| static int esp_alloc_lun_tag(struct esp_cmd_entry *ent, |
| struct esp_lun_data *lp) |
| { |
| if (!ent->orig_tag[0]) { |
| /* Non-tagged, slot already taken? */ |
| if (lp->non_tagged_cmd) |
| return -EBUSY; |
| |
| if (lp->hold) { |
| /* We are being held by active tagged |
| * commands. |
| */ |
| if (lp->num_tagged) |
| return -EBUSY; |
| |
| /* Tagged commands completed, we can unplug |
| * the queue and run this untagged command. |
| */ |
| lp->hold = 0; |
| } else if (lp->num_tagged) { |
| /* Plug the queue until num_tagged decreases |
| * to zero in esp_free_lun_tag. |
| */ |
| lp->hold = 1; |
| return -EBUSY; |
| } |
| |
| lp->non_tagged_cmd = ent; |
| return 0; |
| } else { |
| /* Tagged command, see if blocked by a |
| * non-tagged one. |
| */ |
| if (lp->non_tagged_cmd || lp->hold) |
| return -EBUSY; |
| } |
| |
| BUG_ON(lp->tagged_cmds[ent->orig_tag[1]]); |
| |
| lp->tagged_cmds[ent->orig_tag[1]] = ent; |
| lp->num_tagged++; |
| |
| return 0; |
| } |
| |
| static void esp_free_lun_tag(struct esp_cmd_entry *ent, |
| struct esp_lun_data *lp) |
| { |
| if (ent->orig_tag[0]) { |
| BUG_ON(lp->tagged_cmds[ent->orig_tag[1]] != ent); |
| lp->tagged_cmds[ent->orig_tag[1]] = NULL; |
| lp->num_tagged--; |
| } else { |
| BUG_ON(lp->non_tagged_cmd != ent); |
| lp->non_tagged_cmd = NULL; |
| } |
| } |
| |
| /* When a contingent allegiance conditon is created, we force feed a |
| * REQUEST_SENSE command to the device to fetch the sense data. I |
| * tried many other schemes, relying on the scsi error handling layer |
| * to send out the REQUEST_SENSE automatically, but this was difficult |
| * to get right especially in the presence of applications like smartd |
| * which use SG_IO to send out their own REQUEST_SENSE commands. |
| */ |
| static void esp_autosense(struct esp *esp, struct esp_cmd_entry *ent) |
| { |
| struct scsi_cmnd *cmd = ent->cmd; |
| struct scsi_device *dev = cmd->device; |
| int tgt, lun; |
| u8 *p, val; |
| |
| tgt = dev->id; |
| lun = dev->lun; |
| |
| |
| if (!ent->sense_ptr) { |
| esp_log_autosense("esp%d: Doing auto-sense for " |
| "tgt[%d] lun[%d]\n", |
| esp->host->unique_id, tgt, lun); |
| |
| ent->sense_ptr = cmd->sense_buffer; |
| ent->sense_dma = esp->ops->map_single(esp, |
| ent->sense_ptr, |
| SCSI_SENSE_BUFFERSIZE, |
| DMA_FROM_DEVICE); |
| } |
| ent->saved_sense_ptr = ent->sense_ptr; |
| |
| esp->active_cmd = ent; |
| |
| p = esp->command_block; |
| esp->msg_out_len = 0; |
| |
| *p++ = IDENTIFY(0, lun); |
| *p++ = REQUEST_SENSE; |
| *p++ = ((dev->scsi_level <= SCSI_2) ? |
| (lun << 5) : 0); |
| *p++ = 0; |
| *p++ = 0; |
| *p++ = SCSI_SENSE_BUFFERSIZE; |
| *p++ = 0; |
| |
| esp->select_state = ESP_SELECT_BASIC; |
| |
| val = tgt; |
| if (esp->rev == FASHME) |
| val |= ESP_BUSID_RESELID | ESP_BUSID_CTR32BIT; |
| esp_write8(val, ESP_BUSID); |
| |
| esp_write_tgt_sync(esp, tgt); |
| esp_write_tgt_config3(esp, tgt); |
| |
| val = (p - esp->command_block); |
| |
| if (esp->rev == FASHME) |
| scsi_esp_cmd(esp, ESP_CMD_FLUSH); |
| esp->ops->send_dma_cmd(esp, esp->command_block_dma, |
| val, 16, 0, ESP_CMD_DMA | ESP_CMD_SELA); |
| } |
| |
| static struct esp_cmd_entry *find_and_prep_issuable_command(struct esp *esp) |
| { |
| struct esp_cmd_entry *ent; |
| |
| list_for_each_entry(ent, &esp->queued_cmds, list) { |
| struct scsi_cmnd *cmd = ent->cmd; |
| struct scsi_device *dev = cmd->device; |
| struct esp_lun_data *lp = dev->hostdata; |
| |
| if (ent->flags & ESP_CMD_FLAG_AUTOSENSE) { |
| ent->tag[0] = 0; |
| ent->tag[1] = 0; |
| return ent; |
| } |
| |
| if (!spi_populate_tag_msg(&ent->tag[0], cmd)) { |
| ent->tag[0] = 0; |
| ent->tag[1] = 0; |
| } |
| ent->orig_tag[0] = ent->tag[0]; |
| ent->orig_tag[1] = ent->tag[1]; |
| |
| if (esp_alloc_lun_tag(ent, lp) < 0) |
| continue; |
| |
| return ent; |
| } |
| |
| return NULL; |
| } |
| |
| static void esp_maybe_execute_command(struct esp *esp) |
| { |
| struct esp_target_data *tp; |
| struct esp_lun_data *lp; |
| struct scsi_device *dev; |
| struct scsi_cmnd *cmd; |
| struct esp_cmd_entry *ent; |
| int tgt, lun, i; |
| u32 val, start_cmd; |
| u8 *p; |
| |
| if (esp->active_cmd || |
| (esp->flags & ESP_FLAG_RESETTING)) |
| return; |
| |
| ent = find_and_prep_issuable_command(esp); |
| if (!ent) |
| return; |
| |
| if (ent->flags & ESP_CMD_FLAG_AUTOSENSE) { |
| esp_autosense(esp, ent); |
| return; |
| } |
| |
| cmd = ent->cmd; |
| dev = cmd->device; |
| tgt = dev->id; |
| lun = dev->lun; |
| tp = &esp->target[tgt]; |
| lp = dev->hostdata; |
| |
| list_move(&ent->list, &esp->active_cmds); |
| |
| esp->active_cmd = ent; |
| |
| esp_map_dma(esp, cmd); |
| esp_save_pointers(esp, ent); |
| |
| esp_check_command_len(esp, cmd); |
| |
| p = esp->command_block; |
| |
| esp->msg_out_len = 0; |
| if (tp->flags & ESP_TGT_CHECK_NEGO) { |
| /* Need to negotiate. If the target is broken |
| * go for synchronous transfers and non-wide. |
| */ |
| if (tp->flags & ESP_TGT_BROKEN) { |
| tp->flags &= ~ESP_TGT_DISCONNECT; |
| tp->nego_goal_period = 0; |
| tp->nego_goal_offset = 0; |
| tp->nego_goal_width = 0; |
| tp->nego_goal_tags = 0; |
| } |
| |
| /* If the settings are not changing, skip this. */ |
| if (spi_width(tp->starget) == tp->nego_goal_width && |
| spi_period(tp->starget) == tp->nego_goal_period && |
| spi_offset(tp->starget) == tp->nego_goal_offset) { |
| tp->flags &= ~ESP_TGT_CHECK_NEGO; |
| goto build_identify; |
| } |
| |
| if (esp->rev == FASHME && esp_need_to_nego_wide(tp)) { |
| esp->msg_out_len = |
| spi_populate_width_msg(&esp->msg_out[0], |
| (tp->nego_goal_width ? |
| 1 : 0)); |
| tp->flags |= ESP_TGT_NEGO_WIDE; |
| } else if (esp_need_to_nego_sync(tp)) { |
| esp->msg_out_len = |
| spi_populate_sync_msg(&esp->msg_out[0], |
| tp->nego_goal_period, |
| tp->nego_goal_offset); |
| tp->flags |= ESP_TGT_NEGO_SYNC; |
| } else { |
| tp->flags &= ~ESP_TGT_CHECK_NEGO; |
| } |
| |
| /* Process it like a slow command. */ |
| if (tp->flags & (ESP_TGT_NEGO_WIDE | ESP_TGT_NEGO_SYNC)) |
| esp->flags |= ESP_FLAG_DOING_SLOWCMD; |
| } |
| |
| build_identify: |
| /* If we don't have a lun-data struct yet, we're probing |
| * so do not disconnect. Also, do not disconnect unless |
| * we have a tag on this command. |
| */ |
| if (lp && (tp->flags & ESP_TGT_DISCONNECT) && ent->tag[0]) |
| *p++ = IDENTIFY(1, lun); |
| else |
| *p++ = IDENTIFY(0, lun); |
| |
| if (ent->tag[0] && esp->rev == ESP100) { |
| /* ESP100 lacks select w/atn3 command, use select |
| * and stop instead. |
| */ |
| esp->flags |= ESP_FLAG_DOING_SLOWCMD; |
| } |
| |
| if (!(esp->flags & ESP_FLAG_DOING_SLOWCMD)) { |
| start_cmd = ESP_CMD_DMA | ESP_CMD_SELA; |
| if (ent->tag[0]) { |
| *p++ = ent->tag[0]; |
| *p++ = ent->tag[1]; |
| |
| start_cmd = ESP_CMD_DMA | ESP_CMD_SA3; |
| } |
| |
| for (i = 0; i < cmd->cmd_len; i++) |
| *p++ = cmd->cmnd[i]; |
| |
| esp->select_state = ESP_SELECT_BASIC; |
| } else { |
| esp->cmd_bytes_left = cmd->cmd_len; |
| esp->cmd_bytes_ptr = &cmd->cmnd[0]; |
| |
| if (ent->tag[0]) { |
| for (i = esp->msg_out_len - 1; |
| i >= 0; i--) |
| esp->msg_out[i + 2] = esp->msg_out[i]; |
| esp->msg_out[0] = ent->tag[0]; |
| esp->msg_out[1] = ent->tag[1]; |
| esp->msg_out_len += 2; |
| } |
| |
| start_cmd = ESP_CMD_DMA | ESP_CMD_SELAS; |
| esp->select_state = ESP_SELECT_MSGOUT; |
| } |
| val = tgt; |
| if (esp->rev == FASHME) |
| val |= ESP_BUSID_RESELID | ESP_BUSID_CTR32BIT; |
| esp_write8(val, ESP_BUSID); |
| |
| esp_write_tgt_sync(esp, tgt); |
| esp_write_tgt_config3(esp, tgt); |
| |
| val = (p - esp->command_block); |
| |
| if (esp_debug & ESP_DEBUG_SCSICMD) { |
| printk("ESP: tgt[%d] lun[%d] scsi_cmd [ ", tgt, lun); |
| for (i = 0; i < cmd->cmd_len; i++) |
| printk("%02x ", cmd->cmnd[i]); |
| printk("]\n"); |
| } |
| |
| if (esp->rev == FASHME) |
| scsi_esp_cmd(esp, ESP_CMD_FLUSH); |
| esp->ops->send_dma_cmd(esp, esp->command_block_dma, |
| val, 16, 0, start_cmd); |
| } |
| |
| static struct esp_cmd_entry *esp_get_ent(struct esp *esp) |
| { |
| struct list_head *head = &esp->esp_cmd_pool; |
| struct esp_cmd_entry *ret; |
| |
| if (list_empty(head)) { |
| ret = kzalloc(sizeof(struct esp_cmd_entry), GFP_ATOMIC); |
| } else { |
| ret = list_entry(head->next, struct esp_cmd_entry, list); |
| list_del(&ret->list); |
| memset(ret, 0, sizeof(*ret)); |
| } |
| return ret; |
| } |
| |
| static void esp_put_ent(struct esp *esp, struct esp_cmd_entry *ent) |
| { |
| list_add(&ent->list, &esp->esp_cmd_pool); |
| } |
| |
| static void esp_cmd_is_done(struct esp *esp, struct esp_cmd_entry *ent, |
| struct scsi_cmnd *cmd, unsigned int result) |
| { |
| struct scsi_device *dev = cmd->device; |
| int tgt = dev->id; |
| int lun = dev->lun; |
| |
| esp->active_cmd = NULL; |
| esp_unmap_dma(esp, cmd); |
| esp_free_lun_tag(ent, dev->hostdata); |
| cmd->result = result; |
| |
| if (ent->eh_done) { |
| complete(ent->eh_done); |
| ent->eh_done = NULL; |
| } |
| |
| if (ent->flags & ESP_CMD_FLAG_AUTOSENSE) { |
| esp->ops->unmap_single(esp, ent->sense_dma, |
| SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE); |
| ent->sense_ptr = NULL; |
| |
| /* Restore the message/status bytes to what we actually |
| * saw originally. Also, report that we are providing |
| * the sense data. |
| */ |
| cmd->result = ((DRIVER_SENSE << 24) | |
| (DID_OK << 16) | |
| (COMMAND_COMPLETE << 8) | |
| (SAM_STAT_CHECK_CONDITION << 0)); |
| |
| ent->flags &= ~ESP_CMD_FLAG_AUTOSENSE; |
| if (esp_debug & ESP_DEBUG_AUTOSENSE) { |
| int i; |
| |
| printk("esp%d: tgt[%d] lun[%d] AUTO SENSE[ ", |
| esp->host->unique_id, tgt, lun); |
| for (i = 0; i < 18; i++) |
| printk("%02x ", cmd->sense_buffer[i]); |
| printk("]\n"); |
| } |
| } |
| |
| cmd->scsi_done(cmd); |
| |
| list_del(&ent->list); |
| esp_put_ent(esp, ent); |
| |
| esp_maybe_execute_command(esp); |
| } |
| |
| static unsigned int compose_result(unsigned int status, unsigned int message, |
| unsigned int driver_code) |
| { |
| return (status | (message << 8) | (driver_code << 16)); |
| } |
| |
| static void esp_event_queue_full(struct esp *esp, struct esp_cmd_entry *ent) |
| { |
| struct scsi_device *dev = ent->cmd->device; |
| struct esp_lun_data *lp = dev->hostdata; |
| |
| scsi_track_queue_full(dev, lp->num_tagged - 1); |
| } |
| |
| static int esp_queuecommand_lck(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
| { |
| struct scsi_device *dev = cmd->device; |
| struct esp *esp = shost_priv(dev->host); |
| struct esp_cmd_priv *spriv; |
| struct esp_cmd_entry *ent; |
| |
| ent = esp_get_ent(esp); |
| if (!ent) |
| return SCSI_MLQUEUE_HOST_BUSY; |
| |
| ent->cmd = cmd; |
| |
| cmd->scsi_done = done; |
| |
| spriv = ESP_CMD_PRIV(cmd); |
| spriv->u.dma_addr = ~(dma_addr_t)0x0; |
| |
| list_add_tail(&ent->list, &esp->queued_cmds); |
| |
| esp_maybe_execute_command(esp); |
| |
| return 0; |
| } |
| |
| static DEF_SCSI_QCMD(esp_queuecommand) |
| |
| static int esp_check_gross_error(struct esp *esp) |
| { |
| if (esp->sreg & ESP_STAT_SPAM) { |
| /* Gross Error, could be one of: |
| * - top of fifo overwritten |
| * - top of command register overwritten |
| * - DMA programmed with wrong direction |
| * - improper phase change |
| */ |
| printk(KERN_ERR PFX "esp%d: Gross error sreg[%02x]\n", |
| esp->host->unique_id, esp->sreg); |
| /* XXX Reset the chip. XXX */ |
| return 1; |
| } |
| return 0; |
| } |
| |
| static int esp_check_spur_intr(struct esp *esp) |
| { |
| switch (esp->rev) { |
| case ESP100: |
| case ESP100A: |
| /* The interrupt pending bit of the status register cannot |
| * be trusted on these revisions. |
| */ |
| esp->sreg &= ~ESP_STAT_INTR; |
| break; |
| |
| default: |
| if (!(esp->sreg & ESP_STAT_INTR)) { |
| esp->ireg = esp_read8(ESP_INTRPT); |
| if (esp->ireg & ESP_INTR_SR) |
| return 1; |
| |
| /* If the DMA is indicating interrupt pending and the |
| * ESP is not, the only possibility is a DMA error. |
| */ |
| if (!esp->ops->dma_error(esp)) { |
| printk(KERN_ERR PFX "esp%d: Spurious irq, " |
| "sreg=%02x.\n", |
| esp->host->unique_id, esp->sreg); |
| return -1; |
| } |
| |
| printk(KERN_ERR PFX "esp%d: DMA error\n", |
| esp->host->unique_id); |
| |
| /* XXX Reset the chip. XXX */ |
| return -1; |
| } |
| break; |
| } |
| |
| return 0; |
| } |
| |
| static void esp_schedule_reset(struct esp *esp) |
| { |
| esp_log_reset("ESP: esp_schedule_reset() from %pf\n", |
| __builtin_return_address(0)); |
| esp->flags |= ESP_FLAG_RESETTING; |
| esp_event(esp, ESP_EVENT_RESET); |
| } |
| |
| /* In order to avoid having to add a special half-reconnected state |
| * into the driver we just sit here and poll through the rest of |
| * the reselection process to get the tag message bytes. |
| */ |
| static struct esp_cmd_entry *esp_reconnect_with_tag(struct esp *esp, |
| struct esp_lun_data *lp) |
| { |
| struct esp_cmd_entry *ent; |
| int i; |
| |
| if (!lp->num_tagged) { |
| printk(KERN_ERR PFX "esp%d: Reconnect w/num_tagged==0\n", |
| esp->host->unique_id); |
| return NULL; |
| } |
| |
| esp_log_reconnect("ESP: reconnect tag, "); |
| |
| for (i = 0; i < ESP_QUICKIRQ_LIMIT; i++) { |
| if (esp->ops->irq_pending(esp)) |
| break; |
| } |
| if (i == ESP_QUICKIRQ_LIMIT) { |
| printk(KERN_ERR PFX "esp%d: Reconnect IRQ1 timeout\n", |
| esp->host->unique_id); |
| return NULL; |
| } |
| |
| esp->sreg = esp_read8(ESP_STATUS); |
| esp->ireg = esp_read8(ESP_INTRPT); |
| |
| esp_log_reconnect("IRQ(%d:%x:%x), ", |
| i, esp->ireg, esp->sreg); |
| |
| if (esp->ireg & ESP_INTR_DC) { |
| printk(KERN_ERR PFX "esp%d: Reconnect, got disconnect.\n", |
| esp->host->unique_id); |
| return NULL; |
| } |
| |
| if ((esp->sreg & ESP_STAT_PMASK) != ESP_MIP) { |
| printk(KERN_ERR PFX "esp%d: Reconnect, not MIP sreg[%02x].\n", |
| esp->host->unique_id, esp->sreg); |
| return NULL; |
| } |
| |
| /* DMA in the tag bytes... */ |
| esp->command_block[0] = 0xff; |
| esp->command_block[1] = 0xff; |
| esp->ops->send_dma_cmd(esp, esp->command_block_dma, |
| 2, 2, 1, ESP_CMD_DMA | ESP_CMD_TI); |
| |
| /* ACK the message. */ |
| scsi_esp_cmd(esp, ESP_CMD_MOK); |
| |
| for (i = 0; i < ESP_RESELECT_TAG_LIMIT; i++) { |
| if (esp->ops->irq_pending(esp)) { |
| esp->sreg = esp_read8(ESP_STATUS); |
| esp->ireg = esp_read8(ESP_INTRPT); |
| if (esp->ireg & ESP_INTR_FDONE) |
| break; |
| } |
| udelay(1); |
| } |
| if (i == ESP_RESELECT_TAG_LIMIT) { |
| printk(KERN_ERR PFX "esp%d: Reconnect IRQ2 timeout\n", |
| esp->host->unique_id); |
| return NULL; |
| } |
| esp->ops->dma_drain(esp); |
| esp->ops->dma_invalidate(esp); |
| |
| esp_log_reconnect("IRQ2(%d:%x:%x) tag[%x:%x]\n", |
| i, esp->ireg, esp->sreg, |
| esp->command_block[0], |
| esp->command_block[1]); |
| |
| if (esp->command_block[0] < SIMPLE_QUEUE_TAG || |
| esp->command_block[0] > ORDERED_QUEUE_TAG) { |
| printk(KERN_ERR PFX "esp%d: Reconnect, bad tag " |
| "type %02x.\n", |
| esp->host->unique_id, esp->command_block[0]); |
| return NULL; |
| } |
| |
| ent = lp->tagged_cmds[esp->command_block[1]]; |
| if (!ent) { |
| printk(KERN_ERR PFX "esp%d: Reconnect, no entry for " |
| "tag %02x.\n", |
| esp->host->unique_id, esp->command_block[1]); |
| return NULL; |
| } |
| |
| return ent; |
| } |
| |
| static int esp_reconnect(struct esp *esp) |
| { |
| struct esp_cmd_entry *ent; |
| struct esp_target_data *tp; |
| struct esp_lun_data *lp; |
| struct scsi_device *dev; |
| int target, lun; |
| |
| BUG_ON(esp->active_cmd); |
| if (esp->rev == FASHME) { |
| /* FASHME puts the target and lun numbers directly |
| * into the fifo. |
| */ |
| target = esp->fifo[0]; |
| lun = esp->fifo[1] & 0x7; |
| } else { |
| u8 bits = esp_read8(ESP_FDATA); |
| |
| /* Older chips put the lun directly into the fifo, but |
| * the target is given as a sample of the arbitration |
| * lines on the bus at reselection time. So we should |
| * see the ID of the ESP and the one reconnecting target |
| * set in the bitmap. |
| */ |
| if (!(bits & esp->scsi_id_mask)) |
| goto do_reset; |
| bits &= ~esp->scsi_id_mask; |
| if (!bits || (bits & (bits - 1))) |
| goto do_reset; |
| |
| target = ffs(bits) - 1; |
| lun = (esp_read8(ESP_FDATA) & 0x7); |
| |
| scsi_esp_cmd(esp, ESP_CMD_FLUSH); |
| if (esp->rev == ESP100) { |
| u8 ireg = esp_read8(ESP_INTRPT); |
| /* This chip has a bug during reselection that can |
| * cause a spurious illegal-command interrupt, which |
| * we simply ACK here. Another possibility is a bus |
| * reset so we must check for that. |
| */ |
| if (ireg & ESP_INTR_SR) |
| goto do_reset; |
| } |
| scsi_esp_cmd(esp, ESP_CMD_NULL); |
| } |
| |
| esp_write_tgt_sync(esp, target); |
| esp_write_tgt_config3(esp, target); |
| |
| scsi_esp_cmd(esp, ESP_CMD_MOK); |
| |
| if (esp->rev == FASHME) |
| esp_write8(target | ESP_BUSID_RESELID | ESP_BUSID_CTR32BIT, |
| ESP_BUSID); |
| |
| tp = &esp->target[target]; |
| dev = __scsi_device_lookup_by_target(tp->starget, lun); |
| if (!dev) { |
| printk(KERN_ERR PFX "esp%d: Reconnect, no lp " |
| "tgt[%u] lun[%u]\n", |
| esp->host->unique_id, target, lun); |
| goto do_reset; |
| } |
| lp = dev->hostdata; |
| |
| ent = lp->non_tagged_cmd; |
| if (!ent) { |
| ent = esp_reconnect_with_tag(esp, lp); |
| if (!ent) |
| goto do_reset; |
| } |
| |
| esp->active_cmd = ent; |
| |
| if (ent->flags & ESP_CMD_FLAG_ABORT) { |
| esp->msg_out[0] = ABORT_TASK_SET; |
| esp->msg_out_len = 1; |
| scsi_esp_cmd(esp, ESP_CMD_SATN); |
| } |
| |
| esp_event(esp, ESP_EVENT_CHECK_PHASE); |
| esp_restore_pointers(esp, ent); |
| esp->flags |= ESP_FLAG_QUICKIRQ_CHECK; |
| return 1; |
| |
| do_reset: |
| esp_schedule_reset(esp); |
| return 0; |
| } |
| |
| static int esp_finish_select(struct esp *esp) |
| { |
| struct esp_cmd_entry *ent; |
| struct scsi_cmnd *cmd; |
| u8 orig_select_state; |
| |
| orig_select_state = esp->select_state; |
| |
| /* No longer selecting. */ |
| esp->select_state = ESP_SELECT_NONE; |
| |
| esp->seqreg = esp_read8(ESP_SSTEP) & ESP_STEP_VBITS; |
| ent = esp->active_cmd; |
| cmd = ent->cmd; |
| |
| if (esp->ops->dma_error(esp)) { |
| /* If we see a DMA error during or as a result of selection, |
| * all bets are off. |
| */ |
| esp_schedule_reset(esp); |
| esp_cmd_is_done(esp, ent, cmd, (DID_ERROR << 16)); |
| return 0; |
| } |
| |
| esp->ops->dma_invalidate(esp); |
| |
| if (esp->ireg == (ESP_INTR_RSEL | ESP_INTR_FDONE)) { |
| struct esp_target_data *tp = &esp->target[cmd->device->id]; |
| |
| /* Carefully back out of the selection attempt. Release |
| * resources (such as DMA mapping & TAG) and reset state (such |
| * as message out and command delivery variables). |
| */ |
| if (!(ent->flags & ESP_CMD_FLAG_AUTOSENSE)) { |
| esp_unmap_dma(esp, cmd); |
| esp_free_lun_tag(ent, cmd->device->hostdata); |
| tp->flags &= ~(ESP_TGT_NEGO_SYNC | ESP_TGT_NEGO_WIDE); |
| esp->flags &= ~ESP_FLAG_DOING_SLOWCMD; |
| esp->cmd_bytes_ptr = NULL; |
| esp->cmd_bytes_left = 0; |
| } else { |
| esp->ops->unmap_single(esp, ent->sense_dma, |
| SCSI_SENSE_BUFFERSIZE, |
| DMA_FROM_DEVICE); |
| ent->sense_ptr = NULL; |
| } |
| |
| /* Now that the state is unwound properly, put back onto |
| * the issue queue. This command is no longer active. |
| */ |
| list_move(&ent->list, &esp->queued_cmds); |
| esp->active_cmd = NULL; |
| |
| /* Return value ignored by caller, it directly invokes |
| * esp_reconnect(). |
| */ |
| return 0; |
| } |
| |
| if (esp->ireg == ESP_INTR_DC) { |
| struct scsi_device *dev = cmd->device; |
| |
| /* Disconnect. Make sure we re-negotiate sync and |
| * wide parameters if this target starts responding |
| * again in the future. |
| */ |
| esp->target[dev->id].flags |= ESP_TGT_CHECK_NEGO; |
| |
| scsi_esp_cmd(esp, ESP_CMD_ESEL); |
| esp_cmd_is_done(esp, ent, cmd, (DID_BAD_TARGET << 16)); |
| return 1; |
| } |
| |
| if (esp->ireg == (ESP_INTR_FDONE | ESP_INTR_BSERV)) { |
| /* Selection successful. On pre-FAST chips we have |
| * to do a NOP and possibly clean out the FIFO. |
| */ |
| if (esp->rev <= ESP236) { |
| int fcnt = esp_read8(ESP_FFLAGS) & ESP_FF_FBYTES; |
| |
| scsi_esp_cmd(esp, ESP_CMD_NULL); |
| |
| if (!fcnt && |
| (!esp->prev_soff || |
| ((esp->sreg & ESP_STAT_PMASK) != ESP_DIP))) |
| esp_flush_fifo(esp); |
| } |
| |
| /* If we are doing a slow command, negotiation, etc. |
| * we'll do the right thing as we transition to the |
| * next phase. |
| */ |
| esp_event(esp, ESP_EVENT_CHECK_PHASE); |
| return 0; |
| } |
| |
| printk("ESP: Unexpected selection completion ireg[%x].\n", |
| esp->ireg); |
| esp_schedule_reset(esp); |
| return 0; |
| } |
| |
| static int esp_data_bytes_sent(struct esp *esp, struct esp_cmd_entry *ent, |
| struct scsi_cmnd *cmd) |
| { |
| int fifo_cnt, ecount, bytes_sent, flush_fifo; |
| |
| fifo_cnt = esp_read8(ESP_FFLAGS) & ESP_FF_FBYTES; |
| if (esp->prev_cfg3 & ESP_CONFIG3_EWIDE) |
| fifo_cnt <<= 1; |
| |
| ecount = 0; |
| if (!(esp->sreg & ESP_STAT_TCNT)) { |
| ecount = ((unsigned int)esp_read8(ESP_TCLOW) | |
| (((unsigned int)esp_read8(ESP_TCMED)) << 8)); |
| if (esp->rev == FASHME) |
| ecount |= ((unsigned int)esp_read8(FAS_RLO)) << 16; |
| } |
| |
| bytes_sent = esp->data_dma_len; |
| bytes_sent -= ecount; |
| |
| if (!(ent->flags & ESP_CMD_FLAG_WRITE)) |
| bytes_sent -= fifo_cnt; |
| |
| flush_fifo = 0; |
| if (!esp->prev_soff) { |
| /* Synchronous data transfer, always flush fifo. */ |
| flush_fifo = 1; |
| } else { |
| if (esp->rev == ESP100) { |
| u32 fflags, phase; |
| |
| /* ESP100 has a chip bug where in the synchronous data |
| * phase it can mistake a final long REQ pulse from the |
| * target as an extra data byte. Fun. |
| * |
| * To detect this case we resample the status register |
| * and fifo flags. If we're still in a data phase and |
| * we see spurious chunks in the fifo, we return error |
| * to the caller which should reset and set things up |
| * such that we only try future transfers to this |
| * target in synchronous mode. |
| */ |
| esp->sreg = esp_read8(ESP_STATUS); |
| phase = esp->sreg & ESP_STAT_PMASK; |
| fflags = esp_read8(ESP_FFLAGS); |
| |
| if ((phase == ESP_DOP && |
| (fflags & ESP_FF_ONOTZERO)) || |
| (phase == ESP_DIP && |
| (fflags & ESP_FF_FBYTES))) |
| return -1; |
| } |
| if (!(ent->flags & ESP_CMD_FLAG_WRITE)) |
| flush_fifo = 1; |
| } |
| |
| if (flush_fifo) |
| esp_flush_fifo(esp); |
| |
| return bytes_sent; |
| } |
| |
| static void esp_setsync(struct esp *esp, struct esp_target_data *tp, |
| u8 scsi_period, u8 scsi_offset, |
| u8 esp_stp, u8 esp_soff) |
| { |
| spi_period(tp->starget) = scsi_period; |
| spi_offset(tp->starget) = scsi_offset; |
| spi_width(tp->starget) = (tp->flags & ESP_TGT_WIDE) ? 1 : 0; |
| |
| if (esp_soff) { |
| esp_stp &= 0x1f; |
| esp_soff |= esp->radelay; |
| if (esp->rev >= FAS236) { |
| u8 bit = ESP_CONFIG3_FSCSI; |
| if (esp->rev >= FAS100A) |
| bit = ESP_CONFIG3_FAST; |
| |
| if (scsi_period < 50) { |
| if (esp->rev == FASHME) |
| esp_soff &= ~esp->radelay; |
| tp->esp_config3 |= bit; |
| } else { |
| tp->esp_config3 &= ~bit; |
| } |
| esp->prev_cfg3 = tp->esp_config3; |
| esp_write8(esp->prev_cfg3, ESP_CFG3); |
| } |
| } |
| |
| tp->esp_period = esp->prev_stp = esp_stp; |
| tp->esp_offset = esp->prev_soff = esp_soff; |
| |
| esp_write8(esp_soff, ESP_SOFF); |
| esp_write8(esp_stp, ESP_STP); |
| |
| tp->flags &= ~(ESP_TGT_NEGO_SYNC | ESP_TGT_CHECK_NEGO); |
| |
| spi_display_xfer_agreement(tp->starget); |
| } |
| |
| static void esp_msgin_reject(struct esp *esp) |
| { |
| struct esp_cmd_entry *ent = esp->active_cmd; |
| struct scsi_cmnd *cmd = ent->cmd; |
| struct esp_target_data *tp; |
| int tgt; |
| |
| tgt = cmd->device->id; |
| tp = &esp->target[tgt]; |
| |
| if (tp->flags & ESP_TGT_NEGO_WIDE) { |
| tp->flags &= ~(ESP_TGT_NEGO_WIDE | ESP_TGT_WIDE); |
| |
| if (!esp_need_to_nego_sync(tp)) { |
| tp->flags &= ~ESP_TGT_CHECK_NEGO; |
| scsi_esp_cmd(esp, ESP_CMD_RATN); |
| } else { |
| esp->msg_out_len = |
| spi_populate_sync_msg(&esp->msg_out[0], |
| tp->nego_goal_period, |
| tp->nego_goal_offset); |
| tp->flags |= ESP_TGT_NEGO_SYNC; |
| scsi_esp_cmd(esp, ESP_CMD_SATN); |
| } |
| return; |
| } |
| |
| if (tp->flags & ESP_TGT_NEGO_SYNC) { |
| tp->flags &= ~(ESP_TGT_NEGO_SYNC | ESP_TGT_CHECK_NEGO); |
| tp->esp_period = 0; |
| tp->esp_offset = 0; |
| esp_setsync(esp, tp, 0, 0, 0, 0); |
| scsi_esp_cmd(esp, ESP_CMD_RATN); |
| return; |
| } |
| |
| esp->msg_out[0] = ABORT_TASK_SET; |
| esp->msg_out_len = 1; |
| scsi_esp_cmd(esp, ESP_CMD_SATN); |
| } |
| |
| static void esp_msgin_sdtr(struct esp *esp, struct esp_target_data *tp) |
| { |
| u8 period = esp->msg_in[3]; |
| u8 offset = esp->msg_in[4]; |
| u8 stp; |
| |
| if (!(tp->flags & ESP_TGT_NEGO_SYNC)) |
| goto do_reject; |
| |
| if (offset > 15) |
| goto do_reject; |
| |
| if (offset) { |
| int one_clock; |
| |
| if (period > esp->max_period) { |
| period = offset = 0; |
| goto do_sdtr; |
| } |
| if (period < esp->min_period) |
| goto do_reject; |
| |
| one_clock = esp->ccycle / 1000; |
| stp = DIV_ROUND_UP(period << 2, one_clock); |
| if (stp && esp->rev >= FAS236) { |
| if (stp >= 50) |
| stp--; |
| } |
| } else { |
| stp = 0; |
| } |
| |
| esp_setsync(esp, tp, period, offset, stp, offset); |
| return; |
| |
| do_reject: |
| esp->msg_out[0] = MESSAGE_REJECT; |
| esp->msg_out_len = 1; |
| scsi_esp_cmd(esp, ESP_CMD_SATN); |
| return; |
| |
| do_sdtr: |
| tp->nego_goal_period = period; |
| tp->nego_goal_offset = offset; |
| esp->msg_out_len = |
| spi_populate_sync_msg(&esp->msg_out[0], |
| tp->nego_goal_period, |
| tp->nego_goal_offset); |
| scsi_esp_cmd(esp, ESP_CMD_SATN); |
| } |
| |
| static void esp_msgin_wdtr(struct esp *esp, struct esp_target_data *tp) |
| { |
| int size = 8 << esp->msg_in[3]; |
| u8 cfg3; |
| |
| if (esp->rev != FASHME) |
| goto do_reject; |
| |
| if (size != 8 && size != 16) |
| goto do_reject; |
| |
| if (!(tp->flags & ESP_TGT_NEGO_WIDE)) |
| goto do_reject; |
| |
| cfg3 = tp->esp_config3; |
| if (size == 16) { |
| tp->flags |= ESP_TGT_WIDE; |
| cfg3 |= ESP_CONFIG3_EWIDE; |
| } else { |
| tp->flags &= ~ESP_TGT_WIDE; |
| cfg3 &= ~ESP_CONFIG3_EWIDE; |
| } |
| tp->esp_config3 = cfg3; |
| esp->prev_cfg3 = cfg3; |
| esp_write8(cfg3, ESP_CFG3); |
| |
| tp->flags &= ~ESP_TGT_NEGO_WIDE; |
| |
| spi_period(tp->starget) = 0; |
| spi_offset(tp->starget) = 0; |
| if (!esp_need_to_nego_sync(tp)) { |
| tp->flags &= ~ESP_TGT_CHECK_NEGO; |
| scsi_esp_cmd(esp, ESP_CMD_RATN); |
| } else { |
| esp->msg_out_len = |
| spi_populate_sync_msg(&esp->msg_out[0], |
| tp->nego_goal_period, |
| tp->nego_goal_offset); |
| tp->flags |= ESP_TGT_NEGO_SYNC; |
| scsi_esp_cmd(esp, ESP_CMD_SATN); |
| } |
| return; |
| |
| do_reject: |
| esp->msg_out[0] = MESSAGE_REJECT; |
| esp->msg_out_len = 1; |
| scsi_esp_cmd(esp, ESP_CMD_SATN); |
| } |
| |
| static void esp_msgin_extended(struct esp *esp) |
| { |
| struct esp_cmd_entry *ent = esp->active_cmd; |
| struct scsi_cmnd *cmd = ent->cmd; |
| struct esp_target_data *tp; |
| int tgt = cmd->device->id; |
| |
| tp = &esp->target[tgt]; |
| if (esp->msg_in[2] == EXTENDED_SDTR) { |
| esp_msgin_sdtr(esp, tp); |
| return; |
| } |
| if (esp->msg_in[2] == EXTENDED_WDTR) { |
| esp_msgin_wdtr(esp, tp); |
| return; |
| } |
| |
| printk("ESP: Unexpected extended msg type %x\n", |
| esp->msg_in[2]); |
| |
| esp->msg_out[0] = ABORT_TASK_SET; |
| esp->msg_out_len = 1; |
| scsi_esp_cmd(esp, ESP_CMD_SATN); |
| } |
| |
| /* Analyze msgin bytes received from target so far. Return non-zero |
| * if there are more bytes needed to complete the message. |
| */ |
| static int esp_msgin_process(struct esp *esp) |
| { |
| u8 msg0 = esp->msg_in[0]; |
| int len = esp->msg_in_len; |
| |
| if (msg0 & 0x80) { |
| /* Identify */ |
| printk("ESP: Unexpected msgin identify\n"); |
| return 0; |
| } |
| |
| switch (msg0) { |
| case EXTENDED_MESSAGE: |
| if (len == 1) |
| return 1; |
| if (len < esp->msg_in[1] + 2) |
| return 1; |
| esp_msgin_extended(esp); |
| return 0; |
| |
| case IGNORE_WIDE_RESIDUE: { |
| struct esp_cmd_entry *ent; |
| struct esp_cmd_priv *spriv; |
| if (len == 1) |
| return 1; |
| |
| if (esp->msg_in[1] != 1) |
| goto do_reject; |
| |
| ent = esp->active_cmd; |
| spriv = ESP_CMD_PRIV(ent->cmd); |
| |
| if (spriv->cur_residue == sg_dma_len(spriv->cur_sg)) { |
| spriv->cur_sg--; |
| spriv->cur_residue = 1; |
| } else |
| spriv->cur_residue++; |
| spriv->tot_residue++; |
| return 0; |
| } |
| case NOP: |
| return 0; |
| case RESTORE_POINTERS: |
| esp_restore_pointers(esp, esp->active_cmd); |
| return 0; |
| case SAVE_POINTERS: |
| esp_save_pointers(esp, esp->active_cmd); |
| return 0; |
| |
| case COMMAND_COMPLETE: |
| case DISCONNECT: { |
| struct esp_cmd_entry *ent = esp->active_cmd; |
| |
| ent->message = msg0; |
| esp_event(esp, ESP_EVENT_FREE_BUS); |
| esp->flags |= ESP_FLAG_QUICKIRQ_CHECK; |
| return 0; |
| } |
| case MESSAGE_REJECT: |
| esp_msgin_reject(esp); |
| return 0; |
| |
| default: |
| do_reject: |
| esp->msg_out[0] = MESSAGE_REJECT; |
| esp->msg_out_len = 1; |
| scsi_esp_cmd(esp, ESP_CMD_SATN); |
| return 0; |
| } |
| } |
| |
| static int esp_process_event(struct esp *esp) |
| { |
| int write; |
| |
| again: |
| write = 0; |
| switch (esp->event) { |
| case ESP_EVENT_CHECK_PHASE: |
| switch (esp->sreg & ESP_STAT_PMASK) { |
| case ESP_DOP: |
| esp_event(esp, ESP_EVENT_DATA_OUT); |
| break; |
| case ESP_DIP: |
| esp_event(esp, ESP_EVENT_DATA_IN); |
| break; |
| case ESP_STATP: |
| esp_flush_fifo(esp); |
| scsi_esp_cmd(esp, ESP_CMD_ICCSEQ); |
| esp_event(esp, ESP_EVENT_STATUS); |
| esp->flags |= ESP_FLAG_QUICKIRQ_CHECK; |
| return 1; |
| |
| case ESP_MOP: |
| esp_event(esp, ESP_EVENT_MSGOUT); |
| break; |
| |
| case ESP_MIP: |
| esp_event(esp, ESP_EVENT_MSGIN); |
| break; |
| |
| case ESP_CMDP: |
| esp_event(esp, ESP_EVENT_CMD_START); |
| break; |
| |
| default: |
| printk("ESP: Unexpected phase, sreg=%02x\n", |
| esp->sreg); |
| esp_schedule_reset(esp); |
| return 0; |
| } |
| goto again; |
| break; |
| |
| case ESP_EVENT_DATA_IN: |
| write = 1; |
| /* fallthru */ |
| |
| case ESP_EVENT_DATA_OUT: { |
| struct esp_cmd_entry *ent = esp->active_cmd; |
| struct scsi_cmnd *cmd = ent->cmd; |
| dma_addr_t dma_addr = esp_cur_dma_addr(ent, cmd); |
| unsigned int dma_len = esp_cur_dma_len(ent, cmd); |
| |
| if (esp->rev == ESP100) |
| scsi_esp_cmd(esp, ESP_CMD_NULL); |
| |
| if (write) |
| ent->flags |= ESP_CMD_FLAG_WRITE; |
| else |
| ent->flags &= ~ESP_CMD_FLAG_WRITE; |
| |
| if (esp->ops->dma_length_limit) |
| dma_len = esp->ops->dma_length_limit(esp, dma_addr, |
| dma_len); |
| else |
| dma_len = esp_dma_length_limit(esp, dma_addr, dma_len); |
| |
| esp->data_dma_len = dma_len; |
| |
| if (!dma_len) { |
| printk(KERN_ERR PFX "esp%d: DMA length is zero!\n", |
| esp->host->unique_id); |
| printk(KERN_ERR PFX "esp%d: cur adr[%08llx] len[%08x]\n", |
| esp->host->unique_id, |
| (unsigned long long)esp_cur_dma_addr(ent, cmd), |
| esp_cur_dma_len(ent, cmd)); |
| esp_schedule_reset(esp); |
| return 0; |
| } |
| |
| esp_log_datastart("ESP: start data addr[%08llx] len[%u] " |
| "write(%d)\n", |
| (unsigned long long)dma_addr, dma_len, write); |
| |
| esp->ops->send_dma_cmd(esp, dma_addr, dma_len, dma_len, |
| write, ESP_CMD_DMA | ESP_CMD_TI); |
| esp_event(esp, ESP_EVENT_DATA_DONE); |
| break; |
| } |
| case ESP_EVENT_DATA_DONE: { |
| struct esp_cmd_entry *ent = esp->active_cmd; |
| struct scsi_cmnd *cmd = ent->cmd; |
| int bytes_sent; |
| |
| if (esp->ops->dma_error(esp)) { |
| printk("ESP: data done, DMA error, resetting\n"); |
| esp_schedule_reset(esp); |
| return 0; |
| } |
| |
| if (ent->flags & ESP_CMD_FLAG_WRITE) { |
| /* XXX parity errors, etc. XXX */ |
| |
| esp->ops->dma_drain(esp); |
| } |
| esp->ops->dma_invalidate(esp); |
| |
| if (esp->ireg != ESP_INTR_BSERV) { |
| /* We should always see exactly a bus-service |
| * interrupt at the end of a successful transfer. |
| */ |
| printk("ESP: data done, not BSERV, resetting\n"); |
| esp_schedule_reset(esp); |
| return 0; |
| } |
| |
| bytes_sent = esp_data_bytes_sent(esp, ent, cmd); |
| |
| esp_log_datadone("ESP: data done flgs[%x] sent[%d]\n", |
| ent->flags, bytes_sent); |
| |
| if (bytes_sent < 0) { |
| /* XXX force sync mode for this target XXX */ |
| esp_schedule_reset(esp); |
| return 0; |
| } |
| |
| esp_advance_dma(esp, ent, cmd, bytes_sent); |
| esp_event(esp, ESP_EVENT_CHECK_PHASE); |
| goto again; |
| } |
| |
| case ESP_EVENT_STATUS: { |
| struct esp_cmd_entry *ent = esp->active_cmd; |
| |
| if (esp->ireg & ESP_INTR_FDONE) { |
| ent->status = esp_read8(ESP_FDATA); |
| ent->message = esp_read8(ESP_FDATA); |
| scsi_esp_cmd(esp, ESP_CMD_MOK); |
| } else if (esp->ireg == ESP_INTR_BSERV) { |
| ent->status = esp_read8(ESP_FDATA); |
| ent->message = 0xff; |
| esp_event(esp, ESP_EVENT_MSGIN); |
| return 0; |
| } |
| |
| if (ent->message != COMMAND_COMPLETE) { |
| printk("ESP: Unexpected message %x in status\n", |
| ent->message); |
| esp_schedule_reset(esp); |
| return 0; |
| } |
| |
| esp_event(esp, ESP_EVENT_FREE_BUS); |
| esp->flags |= ESP_FLAG_QUICKIRQ_CHECK; |
| break; |
| } |
| case ESP_EVENT_FREE_BUS: { |
| struct esp_cmd_entry *ent = esp->active_cmd; |
| struct scsi_cmnd *cmd = ent->cmd; |
| |
| if (ent->message == COMMAND_COMPLETE || |
| ent->message == DISCONNECT) |
| scsi_esp_cmd(esp, ESP_CMD_ESEL); |
| |
| if (ent->message == COMMAND_COMPLETE) { |
| esp_log_cmddone("ESP: Command done status[%x] " |
| "message[%x]\n", |
| ent->status, ent->message); |
| if (ent->status == SAM_STAT_TASK_SET_FULL) |
| esp_event_queue_full(esp, ent); |
| |
| if (ent->status == SAM_STAT_CHECK_CONDITION && |
| !(ent->flags & ESP_CMD_FLAG_AUTOSENSE)) { |
| ent->flags |= ESP_CMD_FLAG_AUTOSENSE; |
| esp_autosense(esp, ent); |
| } else { |
| esp_cmd_is_done(esp, ent, cmd, |
| compose_result(ent->status, |
| ent->message, |
| DID_OK)); |
| } |
| } else if (ent->message == DISCONNECT) { |
| esp_log_disconnect("ESP: Disconnecting tgt[%d] " |
| "tag[%x:%x]\n", |
| cmd->device->id, |
| ent->tag[0], ent->tag[1]); |
| |
| esp->active_cmd = NULL; |
| esp_maybe_execute_command(esp); |
| } else { |
| printk("ESP: Unexpected message %x in freebus\n", |
| ent->message); |
| esp_schedule_reset(esp); |
| return 0; |
| } |
| if (esp->active_cmd) |
| esp->flags |= ESP_FLAG_QUICKIRQ_CHECK; |
| break; |
| } |
| case ESP_EVENT_MSGOUT: { |
| scsi_esp_cmd(esp, ESP_CMD_FLUSH); |
| |
| if (esp_debug & ESP_DEBUG_MSGOUT) { |
| int i; |
| printk("ESP: Sending message [ "); |
| for (i = 0; i < esp->msg_out_len; i++) |
| printk("%02x ", esp->msg_out[i]); |
| printk("]\n"); |
| } |
| |
| if (esp->rev == FASHME) { |
| int i; |
| |
| /* Always use the fifo. */ |
| for (i = 0; i < esp->msg_out_len; i++) { |
| esp_write8(esp->msg_out[i], ESP_FDATA); |
| esp_write8(0, ESP_FDATA); |
| } |
| scsi_esp_cmd(esp, ESP_CMD_TI); |
| } else { |
| if (esp->msg_out_len == 1) { |
| esp_write8(esp->msg_out[0], ESP_FDATA); |
| scsi_esp_cmd(esp, ESP_CMD_TI); |
| } else { |
| /* Use DMA. */ |
| memcpy(esp->command_block, |
| esp->msg_out, |
| esp->msg_out_len); |
| |
| esp->ops->send_dma_cmd(esp, |
| esp->command_block_dma, |
| esp->msg_out_len, |
| esp->msg_out_len, |
| 0, |
| ESP_CMD_DMA|ESP_CMD_TI); |
| } |
| } |
| esp_event(esp, ESP_EVENT_MSGOUT_DONE); |
| break; |
| } |
| case ESP_EVENT_MSGOUT_DONE: |
| if (esp->rev == FASHME) { |
| scsi_esp_cmd(esp, ESP_CMD_FLUSH); |
| } else { |
| if (esp->msg_out_len > 1) |
| esp->ops->dma_invalidate(esp); |
| } |
| |
| if (!(esp->ireg & ESP_INTR_DC)) { |
| if (esp->rev != FASHME) |
| scsi_esp_cmd(esp, ESP_CMD_NULL); |
| } |
| esp_event(esp, ESP_EVENT_CHECK_PHASE); |
| goto again; |
| case ESP_EVENT_MSGIN: |
| if (esp->ireg & ESP_INTR_BSERV) { |
| if (esp->rev == FASHME) { |
| if (!(esp_read8(ESP_STATUS2) & |
| ESP_STAT2_FEMPTY)) |
| scsi_esp_cmd(esp, ESP_CMD_FLUSH); |
| } else { |
| scsi_esp_cmd(esp, ESP_CMD_FLUSH); |
| if (esp->rev == ESP100) |
| scsi_esp_cmd(esp, ESP_CMD_NULL); |
| } |
| scsi_esp_cmd(esp, ESP_CMD_TI); |
| esp->flags |= ESP_FLAG_QUICKIRQ_CHECK; |
| return 1; |
| } |
| if (esp->ireg & ESP_INTR_FDONE) { |
| u8 val; |
| |
| if (esp->rev == FASHME) |
| val = esp->fifo[0]; |
| else |
| val = esp_read8(ESP_FDATA); |
| esp->msg_in[esp->msg_in_len++] = val; |
| |
| esp_log_msgin("ESP: Got msgin byte %x\n", val); |
| |
| if (!esp_msgin_process(esp)) |
| esp->msg_in_len = 0; |
| |
| if (esp->rev == FASHME) |
| scsi_esp_cmd(esp, ESP_CMD_FLUSH); |
| |
| scsi_esp_cmd(esp, ESP_CMD_MOK); |
| |
| if (esp->event != ESP_EVENT_FREE_BUS) |
| esp_event(esp, ESP_EVENT_CHECK_PHASE); |
| } else { |
| printk("ESP: MSGIN neither BSERV not FDON, resetting"); |
| esp_schedule_reset(esp); |
| return 0; |
| } |
| break; |
| case ESP_EVENT_CMD_START: |
| memcpy(esp->command_block, esp->cmd_bytes_ptr, |
| esp->cmd_bytes_left); |
| if (esp->rev == FASHME) |
| scsi_esp_cmd(esp, ESP_CMD_FLUSH); |
| esp->ops->send_dma_cmd(esp, esp->command_block_dma, |
| esp->cmd_bytes_left, 16, 0, |
| ESP_CMD_DMA | ESP_CMD_TI); |
| esp_event(esp, ESP_EVENT_CMD_DONE); |
| esp->flags |= ESP_FLAG_QUICKIRQ_CHECK; |
| break; |
| case ESP_EVENT_CMD_DONE: |
| esp->ops->dma_invalidate(esp); |
| if (esp->ireg & ESP_INTR_BSERV) { |
| esp_event(esp, ESP_EVENT_CHECK_PHASE); |
| goto again; |
| } |
| esp_schedule_reset(esp); |
| return 0; |
| break; |
| |
| case ESP_EVENT_RESET: |
| scsi_esp_cmd(esp, ESP_CMD_RS); |
| break; |
| |
| default: |
| printk("ESP: Unexpected event %x, resetting\n", |
| esp->event); |
| esp_schedule_reset(esp); |
| return 0; |
| break; |
| } |
| return 1; |
| } |
| |
| static void esp_reset_cleanup_one(struct esp *esp, struct esp_cmd_entry *ent) |
| { |
| struct scsi_cmnd *cmd = ent->cmd; |
| |
| esp_unmap_dma(esp, cmd); |
| esp_free_lun_tag(ent, cmd->device->hostdata); |
| cmd->result = DID_RESET << 16; |
| |
| if (ent->flags & ESP_CMD_FLAG_AUTOSENSE) { |
| esp->ops->unmap_single(esp, ent->sense_dma, |
| SCSI_SENSE_BUFFERSIZE, DMA_FROM_DEVICE); |
| ent->sense_ptr = NULL; |
| } |
| |
| cmd->scsi_done(cmd); |
| list_del(&ent->list); |
| esp_put_ent(esp, ent); |
| } |
| |
| static void esp_clear_hold(struct scsi_device *dev, void *data) |
| { |
| struct esp_lun_data *lp = dev->hostdata; |
| |
| BUG_ON(lp->num_tagged); |
| lp->hold = 0; |
| } |
| |
| static void esp_reset_cleanup(struct esp *esp) |
| { |
| struct esp_cmd_entry *ent, *tmp; |
| int i; |
| |
| list_for_each_entry_safe(ent, tmp, &esp->queued_cmds, list) { |
| struct scsi_cmnd *cmd = ent->cmd; |
| |
| list_del(&ent->list); |
| cmd->result = DID_RESET << 16; |
| cmd->scsi_done(cmd); |
| esp_put_ent(esp, ent); |
| } |
| |
| list_for_each_entry_safe(ent, tmp, &esp->active_cmds, list) { |
| if (ent == esp->active_cmd) |
| esp->active_cmd = NULL; |
| esp_reset_cleanup_one(esp, ent); |
| } |
| |
| BUG_ON(esp->active_cmd != NULL); |
| |
| /* Force renegotiation of sync/wide transfers. */ |
| for (i = 0; i < ESP_MAX_TARGET; i++) { |
| struct esp_target_data *tp = &esp->target[i]; |
| |
| tp->esp_period = 0; |
| tp->esp_offset = 0; |
| tp->esp_config3 &= ~(ESP_CONFIG3_EWIDE | |
| ESP_CONFIG3_FSCSI | |
| ESP_CONFIG3_FAST); |
| tp->flags &= ~ESP_TGT_WIDE; |
| tp->flags |= ESP_TGT_CHECK_NEGO; |
| |
| if (tp->starget) |
| __starget_for_each_device(tp->starget, NULL, |
| esp_clear_hold); |
| } |
| esp->flags &= ~ESP_FLAG_RESETTING; |
| } |
| |
| /* Runs under host->lock */ |
| static void __esp_interrupt(struct esp *esp) |
| { |
| int finish_reset, intr_done; |
| u8 phase; |
| |
| esp->sreg = esp_read8(ESP_STATUS); |
| |
| if (esp->flags & ESP_FLAG_RESETTING) { |
| finish_reset = 1; |
| } else { |
| if (esp_check_gross_error(esp)) |
| return; |
| |
| finish_reset = esp_check_spur_intr(esp); |
| if (finish_reset < 0) |
| return; |
| } |
| |
| esp->ireg = esp_read8(ESP_INTRPT); |
| |
| if (esp->ireg & ESP_INTR_SR) |
| finish_reset = 1; |
| |
| if (finish_reset) { |
| esp_reset_cleanup(esp); |
| if (esp->eh_reset) { |
| complete(esp->eh_reset); |
| esp->eh_reset = NULL; |
| } |
| return; |
| } |
| |
| phase = (esp->sreg & ESP_STAT_PMASK); |
| if (esp->rev == FASHME) { |
| if (((phase != ESP_DIP && phase != ESP_DOP) && |
| esp->select_state == ESP_SELECT_NONE && |
| esp->event != ESP_EVENT_STATUS && |
| esp->event != ESP_EVENT_DATA_DONE) || |
| (esp->ireg & ESP_INTR_RSEL)) { |
| esp->sreg2 = esp_read8(ESP_STATUS2); |
| if (!(esp->sreg2 & ESP_STAT2_FEMPTY) || |
| (esp->sreg2 & ESP_STAT2_F1BYTE)) |
| hme_read_fifo(esp); |
| } |
| } |
| |
| esp_log_intr("ESP: intr sreg[%02x] seqreg[%02x] " |
| "sreg2[%02x] ireg[%02x]\n", |
| esp->sreg, esp->seqreg, esp->sreg2, esp->ireg); |
| |
| intr_done = 0; |
| |
| if (esp->ireg & (ESP_INTR_S | ESP_INTR_SATN | ESP_INTR_IC)) { |
| printk("ESP: unexpected IREG %02x\n", esp->ireg); |
| if (esp->ireg & ESP_INTR_IC) |
| esp_dump_cmd_log(esp); |
| |
| esp_schedule_reset(esp); |
| } else { |
| if (!(esp->ireg & ESP_INTR_RSEL)) { |
| /* Some combination of FDONE, BSERV, DC. */ |
| if (esp->select_state != ESP_SELECT_NONE) |
| intr_done = esp_finish_select(esp); |
| } else if (esp->ireg & ESP_INTR_RSEL) { |
| if (esp->active_cmd) |
| (void) esp_finish_select(esp); |
| intr_done = esp_reconnect(esp); |
| } |
| } |
| while (!intr_done) |
| intr_done = esp_process_event(esp); |
| } |
| |
| irqreturn_t scsi_esp_intr(int irq, void *dev_id) |
| { |
| struct esp *esp = dev_id; |
| unsigned long flags; |
| irqreturn_t ret; |
| |
| spin_lock_irqsave(esp->host->host_lock, flags); |
| ret = IRQ_NONE; |
| if (esp->ops->irq_pending(esp)) { |
| ret = IRQ_HANDLED; |
| for (;;) { |
| int i; |
| |
| __esp_interrupt(esp); |
| if (!(esp->flags & ESP_FLAG_QUICKIRQ_CHECK)) |
| break; |
| esp->flags &= ~ESP_FLAG_QUICKIRQ_CHECK; |
| |
| for (i = 0; i < ESP_QUICKIRQ_LIMIT; i++) { |
| if (esp->ops->irq_pending(esp)) |
| break; |
| } |
| if (i == ESP_QUICKIRQ_LIMIT) |
| break; |
| } |
| } |
| spin_unlock_irqrestore(esp->host->host_lock, flags); |
| |
| return ret; |
| } |
| EXPORT_SYMBOL(scsi_esp_intr); |
| |
| static void esp_get_revision(struct esp *esp) |
| { |
| u8 val; |
| |
| esp->config1 = (ESP_CONFIG1_PENABLE | (esp->scsi_id & 7)); |
| esp->config2 = (ESP_CONFIG2_SCSI2ENAB | ESP_CONFIG2_REGPARITY); |
| esp_write8(esp->config2, ESP_CFG2); |
| |
| val = esp_read8(ESP_CFG2); |
| val &= ~ESP_CONFIG2_MAGIC; |
| if (val != (ESP_CONFIG2_SCSI2ENAB | ESP_CONFIG2_REGPARITY)) { |
| /* If what we write to cfg2 does not come back, cfg2 is not |
| * implemented, therefore this must be a plain esp100. |
| */ |
| esp->rev = ESP100; |
| } else { |
| esp->config2 = 0; |
| esp_set_all_config3(esp, 5); |
| esp->prev_cfg3 = 5; |
| esp_write8(esp->config2, ESP_CFG2); |
| esp_write8(0, ESP_CFG3); |
| esp_write8(esp->prev_cfg3, ESP_CFG3); |
| |
| val = esp_read8(ESP_CFG3); |
| if (val != 5) { |
| /* The cfg2 register is implemented, however |
| * cfg3 is not, must be esp100a. |
| */ |
| esp->rev = ESP100A; |
| } else { |
| esp_set_all_config3(esp, 0); |
| esp->prev_cfg3 = 0; |
| esp_write8(esp->prev_cfg3, ESP_CFG3); |
| |
| /* All of cfg{1,2,3} implemented, must be one of |
| * the fas variants, figure out which one. |
| */ |
| if (esp->cfact == 0 || esp->cfact > ESP_CCF_F5) { |
| esp->rev = FAST; |
| esp->sync_defp = SYNC_DEFP_FAST; |
| } else { |
| esp->rev = ESP236; |
| } |
| esp->config2 = 0; |
| esp_write8(esp->config2, ESP_CFG2); |
| } |
| } |
| } |
| |
| static void esp_init_swstate(struct esp *esp) |
| { |
| int i; |
| |
| INIT_LIST_HEAD(&esp->queued_cmds); |
| INIT_LIST_HEAD(&esp->active_cmds); |
| INIT_LIST_HEAD(&esp->esp_cmd_pool); |
| |
| /* Start with a clear state, domain validation (via ->slave_configure, |
| * spi_dv_device()) will attempt to enable SYNC, WIDE, and tagged |
| * commands. |
| */ |
| for (i = 0 ; i < ESP_MAX_TARGET; i++) { |
| esp->target[i].flags = 0; |
| esp->target[i].nego_goal_period = 0; |
| esp->target[i].nego_goal_offset = 0; |
| esp->target[i].nego_goal_width = 0; |
| esp->target[i].nego_goal_tags = 0; |
| } |
| } |
| |
| /* This places the ESP into a known state at boot time. */ |
| static void esp_bootup_reset(struct esp *esp) |
| { |
| u8 val; |
| |
| /* Reset the DMA */ |
| esp->ops->reset_dma(esp); |
| |
| /* Reset the ESP */ |
| esp_reset_esp(esp); |
| |
| /* Reset the SCSI bus, but tell ESP not to generate an irq */ |
| val = esp_read8(ESP_CFG1); |
| val |= ESP_CONFIG1_SRRDISAB; |
| esp_write8(val, ESP_CFG1); |
| |
| scsi_esp_cmd(esp, ESP_CMD_RS); |
| udelay(400); |
| |
| esp_write8(esp->config1, ESP_CFG1); |
| |
| /* Eat any bitrot in the chip and we are done... */ |
| esp_read8(ESP_INTRPT); |
| } |
| |
| static void esp_set_clock_params(struct esp *esp) |
| { |
| int fhz; |
| u8 ccf; |
| |
| /* This is getting messy but it has to be done correctly or else |
| * you get weird behavior all over the place. We are trying to |
| * basically figure out three pieces of information. |
| * |
| * a) Clock Conversion Factor |
| * |
| * This is a representation of the input crystal clock frequency |
| * going into the ESP on this machine. Any operation whose timing |
| * is longer than 400ns depends on this value being correct. For |
| * example, you'll get blips for arbitration/selection during high |
| * load or with multiple targets if this is not set correctly. |
| * |
| * b) Selection Time-Out |
| * |
| * The ESP isn't very bright and will arbitrate for the bus and try |
| * to select a target forever if you let it. This value tells the |
| * ESP when it has taken too long to negotiate and that it should |
| * interrupt the CPU so we can see what happened. The value is |
| * computed as follows (from NCR/Symbios chip docs). |
| * |
| * (Time Out Period) * (Input Clock) |
| * STO = ---------------------------------- |
| * (8192) * (Clock Conversion Factor) |
| * |
| * We use a time out period of 250ms (ESP_BUS_TIMEOUT). |
| * |
| * c) Imperical constants for synchronous offset and transfer period |
| * register values |
| * |
| * This entails the smallest and largest sync period we could ever |
| * handle on this ESP. |
| */ |
| fhz = esp->cfreq; |
| |
| ccf = ((fhz / 1000000) + 4) / 5; |
| if (ccf == 1) |
| ccf = 2; |
| |
| /* If we can't find anything reasonable, just assume 20MHZ. |
| * This is the clock frequency of the older sun4c's where I've |
| * been unable to find the clock-frequency PROM property. All |
| * other machines provide useful values it seems. |
| */ |
| if (fhz <= 5000000 || ccf < 1 || ccf > 8) { |
| fhz = 20000000; |
| ccf = 4; |
| } |
| |
| esp->cfact = (ccf == 8 ? 0 : ccf); |
| esp->cfreq = fhz; |
| esp->ccycle = ESP_HZ_TO_CYCLE(fhz); |
| esp->ctick = ESP_TICK(ccf, esp->ccycle); |
| esp->neg_defp = ESP_NEG_DEFP(fhz, ccf); |
| esp->sync_defp = SYNC_DEFP_SLOW; |
| } |
| |
| static const char *esp_chip_names[] = { |
| "ESP100", |
| "ESP100A", |
| "ESP236", |
| "FAS236", |
| "FAS100A", |
| "FAST", |
| "FASHME", |
| }; |
| |
| static struct scsi_transport_template *esp_transport_template; |
| |
| int scsi_esp_register(struct esp *esp, struct device *dev) |
| { |
| static int instance; |
| int err; |
| |
| if (!esp->num_tags) |
| esp->num_tags = ESP_DEFAULT_TAGS; |
| else if (esp->num_tags >= ESP_MAX_TAG) |
| esp->num_tags = ESP_MAX_TAG - 1; |
| esp->host->transportt = esp_transport_template; |
| esp->host->max_lun = ESP_MAX_LUN; |
| esp->host->cmd_per_lun = 2; |
| esp->host->unique_id = instance; |
| |
| esp_set_clock_params(esp); |
| |
| esp_get_revision(esp); |
| |
| esp_init_swstate(esp); |
| |
| esp_bootup_reset(esp); |
| |
| printk(KERN_INFO PFX "esp%u, regs[%1p:%1p] irq[%u]\n", |
| esp->host->unique_id, esp->regs, esp->dma_regs, |
| esp->host->irq); |
| printk(KERN_INFO PFX "esp%u is a %s, %u MHz (ccf=%u), SCSI ID %u\n", |
| esp->host->unique_id, esp_chip_names[esp->rev], |
| esp->cfreq / 1000000, esp->cfact, esp->scsi_id); |
| |
| /* Let the SCSI bus reset settle. */ |
| ssleep(esp_bus_reset_settle); |
| |
| err = scsi_add_host(esp->host, dev); |
| if (err) |
| return err; |
| |
| instance++; |
| |
| scsi_scan_host(esp->host); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(scsi_esp_register); |
| |
| void scsi_esp_unregister(struct esp *esp) |
| { |
| scsi_remove_host(esp->host); |
| } |
| EXPORT_SYMBOL(scsi_esp_unregister); |
| |
| static int esp_target_alloc(struct scsi_target *starget) |
| { |
| struct esp *esp = shost_priv(dev_to_shost(&starget->dev)); |
| struct esp_target_data *tp = &esp->target[starget->id]; |
| |
| tp->starget = starget; |
| |
| return 0; |
| } |
| |
| static void esp_target_destroy(struct scsi_target *starget) |
| { |
| struct esp *esp = shost_priv(dev_to_shost(&starget->dev)); |
| struct esp_target_data *tp = &esp->target[starget->id]; |
| |
| tp->starget = NULL; |
| } |
| |
| static int esp_slave_alloc(struct scsi_device *dev) |
| { |
| struct esp *esp = shost_priv(dev->host); |
| struct esp_target_data *tp = &esp->target[dev->id]; |
| struct esp_lun_data *lp; |
| |
| lp = kzalloc(sizeof(*lp), GFP_KERNEL); |
| if (!lp) |
| return -ENOMEM; |
| dev->hostdata = lp; |
| |
| spi_min_period(tp->starget) = esp->min_period; |
| spi_max_offset(tp->starget) = 15; |
| |
| if (esp->flags & ESP_FLAG_WIDE_CAPABLE) |
| spi_max_width(tp->starget) = 1; |
| else |
| spi_max_width(tp->starget) = 0; |
| |
| return 0; |
| } |
| |
| static int esp_slave_configure(struct scsi_device *dev) |
| { |
| struct esp *esp = shost_priv(dev->host); |
| struct esp_target_data *tp = &esp->target[dev->id]; |
| |
| if (dev->tagged_supported) |
| scsi_change_queue_depth(dev, esp->num_tags); |
| |
| tp->flags |= ESP_TGT_DISCONNECT; |
| |
| if (!spi_initial_dv(dev->sdev_target)) |
| spi_dv_device(dev); |
| |
| return 0; |
| } |
| |
| static void esp_slave_destroy(struct scsi_device *dev) |
| { |
| struct esp_lun_data *lp = dev->hostdata; |
| |
| kfree(lp); |
| dev->hostdata = NULL; |
| } |
| |
| static int esp_eh_abort_handler(struct scsi_cmnd *cmd) |
| { |
| struct esp *esp = shost_priv(cmd->device->host); |
| struct esp_cmd_entry *ent, *tmp; |
| struct completion eh_done; |
| unsigned long flags; |
| |
| /* XXX This helps a lot with debugging but might be a bit |
| * XXX much for the final driver. |
| */ |
| spin_lock_irqsave(esp->host->host_lock, flags); |
| printk(KERN_ERR PFX "esp%d: Aborting command [%p:%02x]\n", |
| esp->host->unique_id, cmd, cmd->cmnd[0]); |
| ent = esp->active_cmd; |
| if (ent) |
| printk(KERN_ERR PFX "esp%d: Current command [%p:%02x]\n", |
| esp->host->unique_id, ent->cmd, ent->cmd->cmnd[0]); |
| list_for_each_entry(ent, &esp->queued_cmds, list) { |
| printk(KERN_ERR PFX "esp%d: Queued command [%p:%02x]\n", |
| esp->host->unique_id, ent->cmd, ent->cmd->cmnd[0]); |
| } |
| list_for_each_entry(ent, &esp->active_cmds, list) { |
| printk(KERN_ERR PFX "esp%d: Active command [%p:%02x]\n", |
| esp->host->unique_id, ent->cmd, ent->cmd->cmnd[0]); |
| } |
| esp_dump_cmd_log(esp); |
| spin_unlock_irqrestore(esp->host->host_lock, flags); |
| |
| spin_lock_irqsave(esp->host->host_lock, flags); |
| |
| ent = NULL; |
| list_for_each_entry(tmp, &esp->queued_cmds, list) { |
| if (tmp->cmd == cmd) { |
| ent = tmp; |
| break; |
| } |
| } |
| |
| if (ent) { |
| /* Easiest case, we didn't even issue the command |
| * yet so it is trivial to abort. |
| */ |
| list_del(&ent->list); |
| |
| cmd->result = DID_ABORT << 16; |
| cmd->scsi_done(cmd); |
| |
| esp_put_ent(esp, ent); |
| |
| goto out_success; |
| } |
| |
| init_completion(&eh_done); |
| |
| ent = esp->active_cmd; |
| if (ent && ent->cmd == cmd) { |
| /* Command is the currently active command on |
| * the bus. If we already have an output message |
| * pending, no dice. |
| */ |
| if (esp->msg_out_len) |
| goto out_failure; |
| |
| /* Send out an abort, encouraging the target to |
| * go to MSGOUT phase by asserting ATN. |
| */ |
| esp->msg_out[0] = ABORT_TASK_SET; |
| esp->msg_out_len = 1; |
| ent->eh_done = &eh_done; |
| |
| scsi_esp_cmd(esp, ESP_CMD_SATN); |
| } else { |
| /* The command is disconnected. This is not easy to |
| * abort. For now we fail and let the scsi error |
| * handling layer go try a scsi bus reset or host |
| * reset. |
| * |
| * What we could do is put together a scsi command |
| * solely for the purpose of sending an abort message |
| * to the target. Coming up with all the code to |
| * cook up scsi commands, special case them everywhere, |
| * etc. is for questionable gain and it would be better |
| * if the generic scsi error handling layer could do at |
| * least some of that for us. |
| * |
| * Anyways this is an area for potential future improvement |
| * in this driver. |
| */ |
| goto out_failure; |
| } |
| |
| spin_unlock_irqrestore(esp->host->host_lock, flags); |
| |
| if (!wait_for_completion_timeout(&eh_done, 5 * HZ)) { |
| spin_lock_irqsave(esp->host->host_lock, flags); |
| ent->eh_done = NULL; |
| spin_unlock_irqrestore(esp->host->host_lock, flags); |
| |
| return FAILED; |
| } |
| |
| return SUCCESS; |
| |
| out_success: |
| spin_unlock_irqrestore(esp->host->host_lock, flags); |
| return SUCCESS; |
| |
| out_failure: |
| /* XXX This might be a good location to set ESP_TGT_BROKEN |
| * XXX since we know which target/lun in particular is |
| * XXX causing trouble. |
| */ |
| spin_unlock_irqrestore(esp->host->host_lock, flags); |
| return FAILED; |
| } |
| |
| static int esp_eh_bus_reset_handler(struct scsi_cmnd *cmd) |
| { |
| struct esp *esp = shost_priv(cmd->device->host); |
| struct completion eh_reset; |
| unsigned long flags; |
| |
| init_completion(&eh_reset); |
| |
| spin_lock_irqsave(esp->host->host_lock, flags); |
| |
| esp->eh_reset = &eh_reset; |
| |
| /* XXX This is too simple... We should add lots of |
| * XXX checks here so that if we find that the chip is |
| * XXX very wedged we return failure immediately so |
| * XXX that we can perform a full chip reset. |
| */ |
| esp->flags |= ESP_FLAG_RESETTING; |
| scsi_esp_cmd(esp, ESP_CMD_RS); |
| |
| spin_unlock_irqrestore(esp->host->host_lock, flags); |
| |
| ssleep(esp_bus_reset_settle); |
| |
| if (!wait_for_completion_timeout(&eh_reset, 5 * HZ)) { |
| spin_lock_irqsave(esp->host->host_lock, flags); |
| esp->eh_reset = NULL; |
| spin_unlock_irqrestore(esp->host->host_lock, flags); |
| |
| return FAILED; |
| } |
| |
| return SUCCESS; |
| } |
| |
| /* All bets are off, reset the entire device. */ |
| static int esp_eh_host_reset_handler(struct scsi_cmnd *cmd) |
| { |
| struct esp *esp = shost_priv(cmd->device->host); |
| unsigned long flags; |
| |
| spin_lock_irqsave(esp->host->host_lock, flags); |
| esp_bootup_reset(esp); |
| esp_reset_cleanup(esp); |
| spin_unlock_irqrestore(esp->host->host_lock, flags); |
| |
| ssleep(esp_bus_reset_settle); |
| |
| return SUCCESS; |
| } |
| |
| static const char *esp_info(struct Scsi_Host *host) |
| { |
| return "esp"; |
| } |
| |
| struct scsi_host_template scsi_esp_template = { |
| .module = THIS_MODULE, |
| .name = "esp", |
| .info = esp_info, |
| .queuecommand = esp_queuecommand, |
| .target_alloc = esp_target_alloc, |
| .target_destroy = esp_target_destroy, |
| .slave_alloc = esp_slave_alloc, |
| .slave_configure = esp_slave_configure, |
| .slave_destroy = esp_slave_destroy, |
| .eh_abort_handler = esp_eh_abort_handler, |
| .eh_bus_reset_handler = esp_eh_bus_reset_handler, |
| .eh_host_reset_handler = esp_eh_host_reset_handler, |
| .can_queue = 7, |
| .this_id = 7, |
| .sg_tablesize = SG_ALL, |
| .use_clustering = ENABLE_CLUSTERING, |
| .max_sectors = 0xffff, |
| .skip_settle_delay = 1, |
| .use_blk_tags = 1, |
| }; |
| EXPORT_SYMBOL(scsi_esp_template); |
| |
| static void esp_get_signalling(struct Scsi_Host *host) |
| { |
| struct esp *esp = shost_priv(host); |
| enum spi_signal_type type; |
| |
| if (esp->flags & ESP_FLAG_DIFFERENTIAL) |
| type = SPI_SIGNAL_HVD; |
| else |
| type = SPI_SIGNAL_SE; |
| |
| spi_signalling(host) = type; |
| } |
| |
| static void esp_set_offset(struct scsi_target *target, int offset) |
| { |
| struct Scsi_Host *host = dev_to_shost(target->dev.parent); |
| struct esp *esp = shost_priv(host); |
| struct esp_target_data *tp = &esp->target[target->id]; |
| |
| if (esp->flags & ESP_FLAG_DISABLE_SYNC) |
| tp->nego_goal_offset = 0; |
| else |
| tp->nego_goal_offset = offset; |
| tp->flags |= ESP_TGT_CHECK_NEGO; |
| } |
| |
| static void esp_set_period(struct scsi_target *target, int period) |
| { |
| struct Scsi_Host *host = dev_to_shost(target->dev.parent); |
| struct esp *esp = shost_priv(host); |
| struct esp_target_data *tp = &esp->target[target->id]; |
| |
| tp->nego_goal_period = period; |
| tp->flags |= ESP_TGT_CHECK_NEGO; |
| } |
| |
| static void esp_set_width(struct scsi_target *target, int width) |
| { |
| struct Scsi_Host *host = dev_to_shost(target->dev.parent); |
| struct esp *esp = shost_priv(host); |
| struct esp_target_data *tp = &esp->target[target->id]; |
| |
| tp->nego_goal_width = (width ? 1 : 0); |
| tp->flags |= ESP_TGT_CHECK_NEGO; |
| } |
| |
| static struct spi_function_template esp_transport_ops = { |
| .set_offset = esp_set_offset, |
| .show_offset = 1, |
| .set_period = esp_set_period, |
| .show_period = 1, |
| .set_width = esp_set_width, |
| .show_width = 1, |
| .get_signalling = esp_get_signalling, |
| }; |
| |
| static int __init esp_init(void) |
| { |
| BUILD_BUG_ON(sizeof(struct scsi_pointer) < |
| sizeof(struct esp_cmd_priv)); |
| |
| esp_transport_template = spi_attach_transport(&esp_transport_ops); |
| if (!esp_transport_template) |
| return -ENODEV; |
| |
| return 0; |
| } |
| |
| static void __exit esp_exit(void) |
| { |
| spi_release_transport(esp_transport_template); |
| } |
| |
| MODULE_DESCRIPTION("ESP SCSI driver core"); |
| MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(DRV_VERSION); |
| |
| module_param(esp_bus_reset_settle, int, 0); |
| MODULE_PARM_DESC(esp_bus_reset_settle, |
| "ESP scsi bus reset delay in seconds"); |
| |
| module_param(esp_debug, int, 0); |
| MODULE_PARM_DESC(esp_debug, |
| "ESP bitmapped debugging message enable value:\n" |
| " 0x00000001 Log interrupt events\n" |
| " 0x00000002 Log scsi commands\n" |
| " 0x00000004 Log resets\n" |
| " 0x00000008 Log message in events\n" |
| " 0x00000010 Log message out events\n" |
| " 0x00000020 Log command completion\n" |
| " 0x00000040 Log disconnects\n" |
| " 0x00000080 Log data start\n" |
| " 0x00000100 Log data done\n" |
| " 0x00000200 Log reconnects\n" |
| " 0x00000400 Log auto-sense data\n" |
| ); |
| |
| module_init(esp_init); |
| module_exit(esp_exit); |