diff options
| -rw-r--r-- | drivers/scsi/stex.c | 177 |
1 files changed, 57 insertions, 120 deletions
diff --git a/drivers/scsi/stex.c b/drivers/scsi/stex.c index fd09330..15fb99f 100644 --- a/drivers/scsi/stex.c +++ b/drivers/scsi/stex.c @@ -34,6 +34,7 @@ #include <scsi/scsi_device.h> #include <scsi/scsi_cmnd.h> #include <scsi/scsi_host.h> +#include <scsi/scsi_tcq.h> #define DRV_NAME "stex" #define ST_DRIVER_VERSION "2.9.0.13" @@ -95,7 +96,6 @@ enum { /* request count, etc. */ MU_MAX_REQUEST = 32, - TAG_BITMAP_LENGTH = MU_MAX_REQUEST, /* one message wasted, use MU_MAX_REQUEST+1 to handle MU_MAX_REQUEST messages */ @@ -265,7 +265,6 @@ struct st_hba { struct Scsi_Host *host; struct pci_dev *pdev; - u32 tag; u32 req_head; u32 req_tail; u32 status_head; @@ -309,40 +308,6 @@ static void stex_gettime(__le32 *time) *(time + 1) = cpu_to_le32((tv.tv_sec >> 16) >> 16); } -static u16 __stex_alloc_tag(unsigned long *bitmap) -{ - int i; - i = find_first_zero_bit(bitmap, TAG_BITMAP_LENGTH); - if (i < TAG_BITMAP_LENGTH) - __set_bit(i, bitmap); - return (u16)i; -} - -static u16 stex_alloc_tag(struct st_hba *hba, unsigned long *bitmap) -{ - unsigned long flags; - u16 tag; - - spin_lock_irqsave(hba->host->host_lock, flags); - tag = __stex_alloc_tag(bitmap); - spin_unlock_irqrestore(hba->host->host_lock, flags); - return tag; -} - -static void __stex_free_tag(unsigned long *bitmap, u16 tag) -{ - __clear_bit((int)tag, bitmap); -} - -static void stex_free_tag(struct st_hba *hba, unsigned long *bitmap, u16 tag) -{ - unsigned long flags; - - spin_lock_irqsave(hba->host->host_lock, flags); - __stex_free_tag(bitmap, tag); - spin_unlock_irqrestore(hba->host->host_lock, flags); -} - static struct status_msg *stex_get_status(struct st_hba *hba) { struct status_msg *status = @@ -535,57 +500,31 @@ stex_send_cmd(struct st_hba *hba, struct req_msg *req, u16 tag) } static int +stex_slave_alloc(struct scsi_device *sdev) +{ + /* Cheat: usually extracted from Inquiry data */ + sdev->tagged_supported = 1; + + scsi_activate_tcq(sdev, sdev->host->can_queue); + + return 0; +} + +static int stex_slave_config(struct scsi_device *sdev) { sdev->use_10_for_rw = 1; sdev->use_10_for_ms = 1; sdev->timeout = 60 * HZ; + sdev->tagged_supported = 1; + return 0; } static void stex_slave_destroy(struct scsi_device *sdev) { - struct st_hba *hba = (struct st_hba *) sdev->host->hostdata; - struct req_msg *req; - unsigned long flags; - unsigned long before; - u16 tag; - - if (sdev->type != TYPE_DISK) - return; - - before = jiffies; - while ((tag = stex_alloc_tag(hba, (unsigned long *)&hba->tag)) - == TAG_BITMAP_LENGTH) { - if (time_after(jiffies, before + ST_INTERNAL_TIMEOUT * HZ)) - return; - msleep(10); - } - - spin_lock_irqsave(hba->host->host_lock, flags); - req = stex_alloc_req(hba); - memset(req->cdb, 0, STEX_CDB_LENGTH); - - req->target = sdev->id; - req->lun = sdev->channel; /* firmware lun issue work around */ - req->cdb[0] = SYNCHRONIZE_CACHE; - - hba->ccb[tag].cmd = NULL; - hba->ccb[tag].sg_count = 0; - hba->ccb[tag].sense_bufflen = 0; - hba->ccb[tag].sense_buffer = NULL; - hba->ccb[tag].req_type |= PASSTHRU_REQ_TYPE; - - stex_send_cmd(hba, req, tag); - spin_unlock_irqrestore(hba->host->host_lock, flags); - - wait_event_timeout(hba->waitq, - !(hba->ccb[tag].req_type), ST_INTERNAL_TIMEOUT * HZ); - if (hba->ccb[tag].req_type & PASSTHRU_REQ_TYPE) - return; - - stex_free_tag(hba, (unsigned long *)&hba->tag, tag); + scsi_deactivate_tcq(sdev, 1); } static int @@ -650,8 +589,9 @@ stex_queuecommand(struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *)) cmd->scsi_done = done; - if (unlikely((tag = __stex_alloc_tag((unsigned long *)&hba->tag)) - == TAG_BITMAP_LENGTH)) + tag = cmd->request->tag; + + if (unlikely(tag >= host->can_queue)) return SCSI_MLQUEUE_HOST_BUSY; req = stex_alloc_req(hba); @@ -771,26 +711,18 @@ static void stex_mu_intr(struct st_hba *hba, u32 doorbell) while (hba->status_tail != hba->status_head) { resp = stex_get_status(hba); tag = le16_to_cpu(resp->tag); - if (unlikely(tag >= TAG_BITMAP_LENGTH)) { + if (unlikely(tag >= hba->host->can_queue)) { printk(KERN_WARNING DRV_NAME "(%s): invalid tag\n", pci_name(hba->pdev)); continue; } - if (unlikely((hba->tag & (1 << tag)) == 0)) { - printk(KERN_WARNING DRV_NAME - "(%s): null tag\n", pci_name(hba->pdev)); - continue; - } - hba->out_req_cnt--; ccb = &hba->ccb[tag]; if (hba->wait_ccb == ccb) hba->wait_ccb = NULL; if (unlikely(ccb->req == NULL)) { printk(KERN_WARNING DRV_NAME "(%s): lagging req\n", pci_name(hba->pdev)); - __stex_free_tag((unsigned long *)&hba->tag, tag); - stex_unmap_sg(hba, ccb->cmd); /* ??? */ continue; } @@ -808,7 +740,15 @@ static void stex_mu_intr(struct st_hba *hba, u32 doorbell) ccb->srb_status = resp->srb_status; ccb->scsi_status = resp->scsi_status; - if (ccb->req_type & PASSTHRU_REQ_TYPE) { + if (likely(ccb->cmd != NULL)) { + if (unlikely(ccb->cmd->cmnd[0] == PASSTHRU_CMD && + ccb->cmd->cmnd[1] == PASSTHRU_GET_ADAPTER)) + stex_controller_info(hba, ccb); + stex_unmap_sg(hba, ccb->cmd); + stex_scsi_done(ccb); + hba->out_req_cnt--; + } else if (ccb->req_type & PASSTHRU_REQ_TYPE) { + hba->out_req_cnt--; if (ccb->req_type & PASSTHRU_REQ_NO_WAKEUP) { ccb->req_type = 0; continue; @@ -816,14 +756,7 @@ static void stex_mu_intr(struct st_hba *hba, u32 doorbell) ccb->req_type = 0; if (waitqueue_active(&hba->waitq)) wake_up(&hba->waitq); - continue; } - if (ccb->cmd->cmnd[0] == PASSTHRU_CMD && - ccb->cmd->cmnd[1] == PASSTHRU_GET_ADAPTER) - stex_controller_info(hba, ccb); - __stex_free_tag((unsigned long *)&hba->tag, tag); - stex_unmap_sg(hba, ccb->cmd); - stex_scsi_done(ccb); } update_status: @@ -933,21 +866,24 @@ static int stex_abort(struct scsi_cmnd *cmd) { struct Scsi_Host *host = cmd->device->host; struct st_hba *hba = (struct st_hba *)host->hostdata; - u16 tag; + u16 tag = cmd->request->tag; void __iomem *base; u32 data; int result = SUCCESS; unsigned long flags; base = hba->mmio_base; spin_lock_irqsave(host->host_lock, flags); - - for (tag = 0; tag < MU_MAX_REQUEST; tag++) - if (hba->ccb[tag].cmd == cmd && (hba->tag & (1 << tag))) { - hba->wait_ccb = &(hba->ccb[tag]); - break; - } - if (tag >= MU_MAX_REQUEST) - goto out; + if (tag < host->can_queue && hba->ccb[tag].cmd == cmd) + hba->wait_ccb = &hba->ccb[tag]; + else { + for (tag = 0; tag < host->can_queue; tag++) + if (hba->ccb[tag].cmd == cmd) { + hba->wait_ccb = &hba->ccb[tag]; + break; + } + if (tag >= host->can_queue) + goto out; + } data = readl(base + ODBL); if (data == 0 || data == 0xffffffff) @@ -965,6 +901,7 @@ static int stex_abort(struct scsi_cmnd *cmd) } fail_out: + stex_unmap_sg(hba, cmd); hba->wait_ccb->req = NULL; /* nullify the req's future return */ hba->wait_ccb = NULL; result = FAILED; @@ -1025,7 +962,6 @@ static int stex_reset(struct scsi_cmnd *cmd) return FAILED; } spin_lock_irqsave(hba->host->host_lock, flags); - hba->tag = 0; hba->req_head = 0; hba->req_tail = 0; hba->status_head = 0; @@ -1061,6 +997,7 @@ static struct scsi_host_template driver_template = { .proc_name = DRV_NAME, .bios_param = stex_biosparam, .queuecommand = stex_queuecommand, + .slave_alloc = stex_slave_alloc, .slave_configure = stex_slave_config, .slave_destroy = stex_slave_destroy, .eh_abort_handler = stex_abort, @@ -1171,6 +1108,14 @@ stex_probe(struct pci_dev *pdev, const struct pci_device_id *id) if (err) goto out_free_irq; + scsi_init_shared_tag_map(host, ST_CAN_QUEUE); + if (host->bqt == NULL) { + err = -ENOMEM; + printk(KERN_ERR DRV_NAME "(%s): init shared queue failed\n", + pci_name(pdev)); + goto out_free_irq; + } + pci_set_drvdata(pdev, hba); err = scsi_add_host(host, &pdev->dev); @@ -1206,15 +1151,7 @@ static void stex_hba_stop(struct st_hba *hba) struct req_msg *req; unsigned long flags; unsigned long before; - u16 tag; - - before = jiffies; - while ((tag = stex_alloc_tag(hba, (unsigned long *)&hba->tag)) - == TAG_BITMAP_LENGTH) { - if (time_after(jiffies, before + ST_INTERNAL_TIMEOUT * HZ)) - return; - msleep(10); - } + u16 tag = 0; spin_lock_irqsave(hba->host->host_lock, flags); req = stex_alloc_req(hba); @@ -1233,12 +1170,12 @@ static void stex_hba_stop(struct st_hba *hba) stex_send_cmd(hba, req, tag); spin_unlock_irqrestore(hba->host->host_lock, flags); - wait_event_timeout(hba->waitq, - !(hba->ccb[tag].req_type), ST_INTERNAL_TIMEOUT * HZ); - if (hba->ccb[tag].req_type & PASSTHRU_REQ_TYPE) - return; - - stex_free_tag(hba, (unsigned long *)&hba->tag, tag); + before = jiffies; + while (hba->ccb[tag].req_type & PASSTHRU_REQ_TYPE) { + if (time_after(jiffies, before + ST_INTERNAL_TIMEOUT * HZ)) + return; + msleep(10); + } } static void stex_hba_free(struct st_hba *hba) |