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scsi: cxlflash: Separate RRQ processing from the RRQ interrupt handler

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In order to support processing the HRRQ by other means (e.g. polling), the
processing portion of the current RRQ interrupt handler needs to be broken out
into a separate routine. This will allow RRQ processing from places other than
the RRQ hardware interrupt handler.

Signed-off-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Matthew R. Ochs 2017-04-12 14:11:44 -05:00 committed by Martin K. Petersen
parent 0d4bd8fea4
commit 76a6ebbeef
1 changed files with 21 additions and 6 deletions
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27
drivers/scsi/cxlflash/main.c
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@ -1155,19 +1155,18 @@ static irqreturn_t cxlflash_sync_err_irq(int irq, void *data)
}
/**
* cxlflash_rrq_irq() - interrupt handler for read-response queue (normal path)
* @irq: Interrupt number.
* @data: Private data provided at interrupt registration, the AFU.
* process_hrrq() - process the read-response queue
* @afu: AFU associated with the host.
*
* Return: Always return IRQ_HANDLED.
* Return: The number of entries processed.
*/
static irqreturn_t cxlflash_rrq_irq(int irq, void *data)
static int process_hrrq(struct afu *afu)
{
struct afu *afu = (struct afu *)data;
struct afu_cmd *cmd;
struct sisl_ioasa *ioasa;
struct sisl_ioarcb *ioarcb;
bool toggle = afu->toggle;
int num_hrrq = 0;
u64 entry,
*hrrq_start = afu->hrrq_start,
*hrrq_end = afu->hrrq_end,
@ -1201,11 +1200,27 @@ static irqreturn_t cxlflash_rrq_irq(int irq, void *data)
}
atomic_inc(&afu->hsq_credits);
num_hrrq++;
}
afu->hrrq_curr = hrrq_curr;
afu->toggle = toggle;
return num_hrrq;
}
/**
* cxlflash_rrq_irq() - interrupt handler for read-response queue (normal path)
* @irq: Interrupt number.
* @data: Private data provided at interrupt registration, the AFU.
*
* Return: Always return IRQ_HANDLED.
*/
static irqreturn_t cxlflash_rrq_irq(int irq, void *data)
{
struct afu *afu = (struct afu *)data;
process_hrrq(afu);
return IRQ_HANDLED;
}