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[SCSI] mvsas: check hd whether unplugged

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if unplugged, driver's queuecommand function will return SAS_PHY_DOWN.
task->lldd_task is used for saving its slot info.

Signed-off-by: Ke Wei <kewei@marvell.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Ke Wei 2008-03-27 14:54:50 +08:00 committed by James Bottomley
parent 1fce5e5da0
commit 4e52fc0a0a
1 changed files with 45 additions and 31 deletions
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68
drivers/scsi/mvsas.c
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@ -1784,15 +1784,19 @@ static u8 mvs_assign_reg_set(struct mvs_info *mvi, struct mvs_port *port)
return MVS_ID_NOT_MAPPED;
}
static u32 mvs_get_ncq_tag(struct sas_task *task)
static u32 mvs_get_ncq_tag(struct sas_task *task, u32 *tag)
{
u32 tag = 0;
struct ata_queued_cmd *qc = task->uldd_task;
if (qc)
tag = qc->tag;
if (qc) {
if (qc->tf.command == ATA_CMD_FPDMA_WRITE ||
qc->tf.command == ATA_CMD_FPDMA_READ) {
*tag = qc->tag;
return 1;
}
}
return tag;
return 0;
}
static int mvs_task_prep_ata(struct mvs_info *mvi,
@ -1836,11 +1840,9 @@ static int mvs_task_prep_ata(struct mvs_info *mvi,
hdr->flags = cpu_to_le32(flags);
/* FIXME: the low order order 5 bits for the TAG if enable NCQ */
if (task->ata_task.use_ncq) {
hdr->tags = cpu_to_le32(mvs_get_ncq_tag(task));
/*Fill in task file */
task->ata_task.fis.sector_count = hdr->tags << 3;
} else
if (task->ata_task.use_ncq && mvs_get_ncq_tag(task, &hdr->tags))
task->ata_task.fis.sector_count |= hdr->tags << 3;
else
hdr->tags = cpu_to_le32(tag);
hdr->data_len = cpu_to_le32(task->total_xfer_len);
@ -1933,13 +1935,16 @@ static int mvs_task_prep_ssp(struct mvs_info *mvi,
u32 flags;
u32 resp_len, req_len, i, tag = tei->tag;
const u32 max_resp_len = SB_RFB_MAX;
u8 phy_mask;
slot = &mvi->slot_info[tag];
phy_mask = (port->wide_port_phymap) ? port->wide_port_phymap :
task->dev->port->phy_mask;
slot->tx = mvi->tx_prod;
mvi->tx[mvi->tx_prod] = cpu_to_le32(TXQ_MODE_I | tag |
(TXQ_CMD_SSP << TXQ_CMD_SHIFT) |
(port->wide_port_phymap << TXQ_PHY_SHIFT));
(phy_mask << TXQ_PHY_SHIFT));
flags = MCH_RETRY;
if (task->ssp_task.enable_first_burst) {
@ -2040,22 +2045,32 @@ static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags)
void __iomem *regs = mvi->regs;
struct mvs_task_exec_info tei;
struct sas_task *t = task;
struct mvs_slot_info *slot;
u32 tag = 0xdeadbeef, rc, n_elem = 0;
unsigned long flags;
u32 n = num, pass = 0;
spin_lock_irqsave(&mvi->lock, flags);
do {
dev = t->dev;
tei.port = &mvi->port[dev->port->id];
if (!tei.port->port_attached) {
if (sas_protocol_ata(t->task_proto)) {
rc = SAS_PHY_DOWN;
goto out_done;
} else {
struct task_status_struct *ts = &t->task_status;
ts->resp = SAS_TASK_UNDELIVERED;
ts->stat = SAS_PHY_DOWN;
t->task_done(t);
rc = 0;
goto exec_exit;
if (n > 1)
t = list_entry(t->list.next,
struct sas_task, list);
continue;
}
}
if (!sas_protocol_ata(t->task_proto)) {
if (t->num_scatter) {
n_elem = pci_map_sg(mvi->pdev, t->scatter,
@ -2074,9 +2089,10 @@ static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags)
if (rc)
goto err_out;
mvi->slot_info[tag].task = t;
mvi->slot_info[tag].n_elem = n_elem;
memset(mvi->slot_info[tag].buf, 0, MVS_SLOT_BUF_SZ);
slot = &mvi->slot_info[tag];
t->lldd_task = NULL;
slot->n_elem = n_elem;
memset(slot->buf, 0, MVS_SLOT_BUF_SZ);
tei.task = t;
tei.hdr = &mvi->slot[tag];
tei.tag = tag;
@ -2105,28 +2121,26 @@ static int mvs_task_exec(struct sas_task *task, const int num, gfp_t gfp_flags)
if (rc)
goto err_out_tag;
slot->task = t;
slot->port = tei.port;
t->lldd_task = (void *) slot;
list_add_tail(&slot->list, &slot->port->list);
/* TODO: select normal or high priority */
spin_lock(&t->task_state_lock);
t->task_state_flags |= SAS_TASK_AT_INITIATOR;
spin_unlock(&t->task_state_lock);
if (n == 1) {
spin_unlock_irqrestore(&mvi->lock, flags);
mw32(TX_PROD_IDX, mvi->tx_prod);
}
mvs_hba_memory_dump(mvi, tag, t->task_proto);
++pass;
mvi->tx_prod = (mvi->tx_prod + 1) & (MVS_CHIP_SLOT_SZ - 1);
if (n == 1)
break;
if (n > 1)
t = list_entry(t->list.next, struct sas_task, list);
} while (--n);
return 0;
rc = 0;
goto out_done;
err_out_tag:
mvs_tag_free(mvi, tag);
@ -2136,7 +2150,7 @@ err_out:
if (n_elem)
pci_unmap_sg(mvi->pdev, t->scatter, n_elem,
t->data_dir);
exec_exit:
out_done:
if (pass)
mw32(TX_PROD_IDX, (mvi->tx_prod - 1) & (MVS_CHIP_SLOT_SZ - 1));
spin_unlock_irqrestore(&mvi->lock, flags);