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arcmsr: simplify of updating doneq_index and postq_index

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Signed-off-by: Ching Huang <ching2048@areca.com.tw>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Ching Huang 2014-09-15 19:05:33 +08:00 committed by Christoph Hellwig
parent b4eb6ae907
commit 3b8155d582
1 changed files with 40 additions and 81 deletions
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121
drivers/scsi/arcmsr/arcmsr_hba.c
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@ -1120,7 +1120,7 @@ static void arcmsr_drain_donequeue(struct AdapterControlBlock *acb, struct Comma
static void arcmsr_done4abort_postqueue(struct AdapterControlBlock *acb)
{
int i = 0;
uint32_t flag_ccb;
uint32_t flag_ccb, ccb_cdb_phy;
struct ARCMSR_CDB *pARCMSR_CDB;
bool error;
struct CommandControlBlock *pCCB;
@ -1164,10 +1164,6 @@ static void arcmsr_done4abort_postqueue(struct AdapterControlBlock *acb)
break;
case ACB_ADAPTER_TYPE_C: {
struct MessageUnit_C __iomem *reg = acb->pmuC;
struct ARCMSR_CDB *pARCMSR_CDB;
uint32_t flag_ccb, ccb_cdb_phy;
bool error;
struct CommandControlBlock *pCCB;
while ((readl(&reg->host_int_status) & ARCMSR_HBCMU_OUTBOUND_POSTQUEUE_ISR) && (i++ < ARCMSR_MAX_OUTSTANDING_CMD)) {
/*need to do*/
flag_ccb = readl(&reg->outbound_queueport_low);
@ -1181,35 +1177,25 @@ static void arcmsr_done4abort_postqueue(struct AdapterControlBlock *acb)
break;
case ACB_ADAPTER_TYPE_D: {
struct MessageUnit_D *pmu = acb->pmuD;
uint32_t ccb_cdb_phy, outbound_write_pointer;
uint32_t doneq_index, index_stripped, addressLow, residual;
bool error;
struct CommandControlBlock *pCCB;
uint32_t outbound_write_pointer;
uint32_t doneq_index, index_stripped, addressLow, residual, toggle;
unsigned long flags;
outbound_write_pointer = pmu->done_qbuffer[0].addressLow + 1;
doneq_index = pmu->doneq_index;
residual = atomic_read(&acb->ccboutstandingcount);
for (i = 0; i < residual; i++) {
while ((doneq_index & 0xFFF) !=
spin_lock_irqsave(&acb->doneq_lock, flags);
outbound_write_pointer =
pmu->done_qbuffer[0].addressLow + 1;
doneq_index = pmu->doneq_index;
if ((doneq_index & 0xFFF) !=
(outbound_write_pointer & 0xFFF)) {
if (doneq_index & 0x4000) {
index_stripped = doneq_index & 0xFFF;
index_stripped += 1;
index_stripped %=
ARCMSR_MAX_ARC1214_DONEQUEUE;
pmu->doneq_index = index_stripped ?
(index_stripped | 0x4000) :
(index_stripped + 1);
} else {
index_stripped = doneq_index;
index_stripped += 1;
index_stripped %=
ARCMSR_MAX_ARC1214_DONEQUEUE;
pmu->doneq_index = index_stripped ?
index_stripped :
((index_stripped | 0x4000) + 1);
}
toggle = doneq_index & 0x4000;
index_stripped = (doneq_index & 0xFFF) + 1;
index_stripped %= ARCMSR_MAX_ARC1214_DONEQUEUE;
pmu->doneq_index = index_stripped ? (index_stripped | toggle) :
((toggle ^ 0x4000) + 1);
doneq_index = pmu->doneq_index;
spin_unlock_irqrestore(&acb->doneq_lock, flags);
addressLow = pmu->done_qbuffer[doneq_index &
0xFFF].addressLow;
ccb_cdb_phy = (addressLow & 0xFFFFFFF0);
@ -1223,11 +1209,10 @@ static void arcmsr_done4abort_postqueue(struct AdapterControlBlock *acb)
arcmsr_drain_donequeue(acb, pCCB, error);
writel(doneq_index,
pmu->outboundlist_read_pointer);
} else {
spin_unlock_irqrestore(&acb->doneq_lock, flags);
mdelay(10);
}
mdelay(10);
outbound_write_pointer =
pmu->done_qbuffer[0].addressLow + 1;
doneq_index = pmu->doneq_index;
}
pmu->postq_index = 0;
pmu->doneq_index = 0x40FF;
@ -1460,7 +1445,7 @@ static void arcmsr_post_ccb(struct AdapterControlBlock *acb, struct CommandContr
case ACB_ADAPTER_TYPE_D: {
struct MessageUnit_D *pmu = acb->pmuD;
u16 index_stripped;
u16 postq_index;
u16 postq_index, toggle;
unsigned long flags;
struct InBound_SRB *pinbound_srb;
@ -1471,19 +1456,11 @@ static void arcmsr_post_ccb(struct AdapterControlBlock *acb, struct CommandContr
pinbound_srb->addressLow = dma_addr_lo32(cdb_phyaddr);
pinbound_srb->length = ccb->arc_cdb_size >> 2;
arcmsr_cdb->msgContext = dma_addr_lo32(cdb_phyaddr);
if (postq_index & 0x4000) {
index_stripped = postq_index & 0xFF;
index_stripped += 1;
index_stripped %= ARCMSR_MAX_ARC1214_POSTQUEUE;
pmu->postq_index = index_stripped ?
(index_stripped | 0x4000) : index_stripped;
} else {
index_stripped = postq_index;
index_stripped += 1;
index_stripped %= ARCMSR_MAX_ARC1214_POSTQUEUE;
pmu->postq_index = index_stripped ? index_stripped :
(index_stripped | 0x4000);
}
toggle = postq_index & 0x4000;
index_stripped = postq_index + 1;
index_stripped &= (ARCMSR_MAX_ARC1214_POSTQUEUE - 1);
pmu->postq_index = index_stripped ? (index_stripped | toggle) :
(toggle ^ 0x4000);
writel(postq_index, pmu->inboundlist_write_pointer);
spin_unlock_irqrestore(&acb->postq_lock, flags);
break;
@ -1999,7 +1976,7 @@ static void arcmsr_hbaC_postqueue_isr(struct AdapterControlBlock *acb)
static void arcmsr_hbaD_postqueue_isr(struct AdapterControlBlock *acb)
{
u32 outbound_write_pointer, doneq_index, index_stripped;
u32 outbound_write_pointer, doneq_index, index_stripped, toggle;
uint32_t addressLow, ccb_cdb_phy;
int error;
struct MessageUnit_D *pmu;
@ -2013,21 +1990,11 @@ static void arcmsr_hbaD_postqueue_isr(struct AdapterControlBlock *acb)
doneq_index = pmu->doneq_index;
if ((doneq_index & 0xFFF) != (outbound_write_pointer & 0xFFF)) {
do {
if (doneq_index & 0x4000) {
index_stripped = doneq_index & 0xFFF;
index_stripped += 1;
index_stripped %= ARCMSR_MAX_ARC1214_DONEQUEUE;
pmu->doneq_index = index_stripped
? (index_stripped | 0x4000) :
(index_stripped + 1);
} else {
index_stripped = doneq_index;
index_stripped += 1;
index_stripped %= ARCMSR_MAX_ARC1214_DONEQUEUE;
pmu->doneq_index = index_stripped
? index_stripped :
((index_stripped | 0x4000) + 1);
}
toggle = doneq_index & 0x4000;
index_stripped = (doneq_index & 0xFFF) + 1;
index_stripped %= ARCMSR_MAX_ARC1214_DONEQUEUE;
pmu->doneq_index = index_stripped ? (index_stripped | toggle) :
((toggle ^ 0x4000) + 1);
doneq_index = pmu->doneq_index;
addressLow = pmu->done_qbuffer[doneq_index &
0xFFF].addressLow;
@ -2890,7 +2857,7 @@ static bool arcmsr_hbaD_get_config(struct AdapterControlBlock *acb)
char __iomem *iop_firm_version;
char __iomem *iop_device_map;
u32 count;
struct MessageUnit_D *reg ;
struct MessageUnit_D *reg;
void *dma_coherent2;
dma_addr_t dma_coherent_handle2;
struct pci_dev *pdev = acb->pdev;
@ -3223,7 +3190,7 @@ static int arcmsr_hbaD_polling_ccbdone(struct AdapterControlBlock *acb,
{
bool error;
uint32_t poll_ccb_done = 0, poll_count = 0, flag_ccb, ccb_cdb_phy;
int rtn, doneq_index, index_stripped, outbound_write_pointer;
int rtn, doneq_index, index_stripped, outbound_write_pointer, toggle;
unsigned long flags;
struct ARCMSR_CDB *arcmsr_cdb;
struct CommandControlBlock *pCCB;
@ -3232,9 +3199,11 @@ static int arcmsr_hbaD_polling_ccbdone(struct AdapterControlBlock *acb,
polling_hbaD_ccb_retry:
poll_count++;
while (1) {
spin_lock_irqsave(&acb->doneq_lock, flags);
outbound_write_pointer = pmu->done_qbuffer[0].addressLow + 1;
doneq_index = pmu->doneq_index;
if ((outbound_write_pointer & 0xFFF) == (doneq_index & 0xFFF)) {
spin_unlock_irqrestore(&acb->doneq_lock, flags);
if (poll_ccb_done) {
rtn = SUCCESS;
break;
@ -3247,23 +3216,13 @@ polling_hbaD_ccb_retry:
goto polling_hbaD_ccb_retry;
}
}
spin_lock_irqsave(&acb->doneq_lock, flags);
if (doneq_index & 0x4000) {
index_stripped = doneq_index & 0xFFF;
index_stripped += 1;
index_stripped %= ARCMSR_MAX_ARC1214_DONEQUEUE;
pmu->doneq_index = index_stripped ?
(index_stripped | 0x4000) :
(index_stripped + 1);
} else {
index_stripped = doneq_index;
index_stripped += 1;
index_stripped %= ARCMSR_MAX_ARC1214_DONEQUEUE;
pmu->doneq_index = index_stripped ? index_stripped :
((index_stripped | 0x4000) + 1);
}
spin_unlock_irqrestore(&acb->doneq_lock, flags);
toggle = doneq_index & 0x4000;
index_stripped = (doneq_index & 0xFFF) + 1;
index_stripped %= ARCMSR_MAX_ARC1214_DONEQUEUE;
pmu->doneq_index = index_stripped ? (index_stripped | toggle) :
((toggle ^ 0x4000) + 1);
doneq_index = pmu->doneq_index;
spin_unlock_irqrestore(&acb->doneq_lock, flags);
flag_ccb = pmu->done_qbuffer[doneq_index & 0xFFF].addressLow;
ccb_cdb_phy = (flag_ccb & 0xFFFFFFF0);
arcmsr_cdb = (struct ARCMSR_CDB *)(acb->vir2phy_offset +