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scsi: csiostor: create per port irq affinity mask set 

csiostor driver allocates per port num_online_cpus() irq vectors, so create
per-port irq affinity mask set to spread irq vectors evenly.

Signed-off-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
hifive-unleashed-5.2
Varun Prakash 2019-04-21 19:00:43 +05:30 committed by Martin K. Petersen
parent a1f9ab4844
commit e95a5e4b1a
1 changed files with 27 additions and 1 deletions
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28
drivers/scsi/csiostor/csio_isr.c
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@ -474,13 +474,39 @@ csio_reduce_sqsets(struct csio_hw *hw, int cnt)
csio_dbg(hw, "Reduced sqsets to %d\n", hw->num_sqsets);
}
static void csio_calc_sets(struct irq_affinity *affd, unsigned int nvecs)
{
struct csio_hw *hw = affd->priv;
u8 i;
if (!nvecs)
return;
if (nvecs < hw->num_pports) {
affd->nr_sets = 1;
affd->set_size[0] = nvecs;
return;
}
affd->nr_sets = hw->num_pports;
for (i = 0; i < hw->num_pports; i++)
affd->set_size[i] = nvecs / hw->num_pports;
}
static int
csio_enable_msix(struct csio_hw *hw)
{
int i, j, k, n, min, cnt;
int extra = CSIO_EXTRA_VECS;
struct csio_scsi_cpu_info *info;
struct irq_affinity desc = { .pre_vectors = 2 };
struct irq_affinity desc = {
.pre_vectors = CSIO_EXTRA_VECS,
.calc_sets = csio_calc_sets,
.priv = hw,
};
if (hw->num_pports > IRQ_AFFINITY_MAX_SETS)
return -ENOSPC;
min = hw->num_pports + extra;
cnt = hw->num_sqsets + extra;