diff options
| author | Mahesh Rajashekhara <Mahesh.Rajashekhara@pmcs.com> | 2015-08-28 06:38:36 -0400 |
|---|---|---|
| committer | James Bottomley <JBottomley@Odin.com> | 2015-11-09 16:01:29 -0800 |
| commit | c6992781d9e8086d592f95870092a59042d111a2 (patch) | |
| tree | 0d6dd0123e51a43d7bea3e5b7a8daa39d14d275c | |
| parent | 9022d375bd22869ba3e5ad3635f00427cfb934fc (diff) | |
aacraid: Enable 64bit write to controller register
If writeq() not supported, then do atomic two 32bit write
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Reviewed-by: Murthy Bhat <Murthy.Bhat@pmcs.com>
Reviewed-by: Karthikeya Sunkesula <Karthikeya.Sunkesula@pmcs.com>
Signed-off-by: Mahesh Rajashekhara <Mahesh.Rajashekhara@pmcs.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
| -rw-r--r-- | drivers/scsi/aacraid/aacraid.h | 9 | ||||
| -rw-r--r-- | drivers/scsi/aacraid/comminit.c | 1 | ||||
| -rw-r--r-- | drivers/scsi/aacraid/src.c | 12 |
3 files changed, 20 insertions, 2 deletions
diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h index 62b099940345..e54f597a058d 100644 --- a/drivers/scsi/aacraid/aacraid.h +++ b/drivers/scsi/aacraid/aacraid.h @@ -844,6 +844,10 @@ struct src_registers { &((AEP)->regs.src.bar0->CSR)) #define src_writel(AEP, CSR, value) writel(value, \ &((AEP)->regs.src.bar0->CSR)) +#if defined(writeq) +#define src_writeq(AEP, CSR, value) writeq(value, \ + &((AEP)->regs.src.bar0->CSR)) +#endif #define SRC_ODR_SHIFT 12 #define SRC_IDR_SHIFT 9 @@ -1163,6 +1167,11 @@ struct aac_dev struct fsa_dev_info *fsa_dev; struct task_struct *thread; int cardtype; + /* + *This lock will protect the two 32-bit + *writes to the Inbound Queue + */ + spinlock_t iq_lock; /* * The following is the device specific extension. diff --git a/drivers/scsi/aacraid/comminit.c b/drivers/scsi/aacraid/comminit.c index 45a0a044dfdb..b4b6088fcb33 100644 --- a/drivers/scsi/aacraid/comminit.c +++ b/drivers/scsi/aacraid/comminit.c @@ -424,6 +424,7 @@ struct aac_dev *aac_init_adapter(struct aac_dev *dev) dev->management_fib_count = 0; spin_lock_init(&dev->manage_lock); spin_lock_init(&dev->sync_lock); + spin_lock_init(&dev->iq_lock); dev->max_fib_size = sizeof(struct hw_fib); dev->sg_tablesize = host->sg_tablesize = (dev->max_fib_size - sizeof(struct aac_fibhdr) diff --git a/drivers/scsi/aacraid/src.c b/drivers/scsi/aacraid/src.c index eb07b3d4ed38..1409a0b945ea 100644 --- a/drivers/scsi/aacraid/src.c +++ b/drivers/scsi/aacraid/src.c @@ -447,6 +447,10 @@ static int aac_src_deliver_message(struct fib *fib) u32 fibsize; dma_addr_t address; struct aac_fib_xporthdr *pFibX; +#if !defined(writeq) + unsigned long flags; +#endif + u16 hdr_size = le16_to_cpu(fib->hw_fib_va->header.Size); atomic_inc(&q->numpending); @@ -511,10 +515,14 @@ static int aac_src_deliver_message(struct fib *fib) return -EINVAL; address |= fibsize; } - +#if defined(writeq) + src_writeq(dev, MUnit.IQ_L, (u64)address); +#else + spin_lock_irqsave(&fib->dev->iq_lock, flags); src_writel(dev, MUnit.IQ_H, upper_32_bits(address) & 0xffffffff); src_writel(dev, MUnit.IQ_L, address & 0xffffffff); - + spin_unlock_irqrestore(&fib->dev->iq_lock, flags); +#endif return 0; } |