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crypto: caam - handle interrupt lines shared across rings 

- add IRQF_SHARED to request_irq flags to support parts such as
the p1023 that has one IRQ line per couple of rings.

- resetting a job ring triggers an interrupt, so move request_irq
prior to jr_reset to avoid 'got IRQ but nobody cared' messages.

- disable IRQs in h/w to avoid contention between reset and
interrupt status

- delete invalid comment - if there were incomplete jobs,
module would be in use, preventing an unload.

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Kim Phillips 2011-04-11 19:15:16 -05:00 committed by Herbert Xu
parent bf36275903
commit 9620fd959f
1 changed files with 20 additions and 26 deletions
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46
drivers/crypto/caam/jr.c
View File

@ -292,10 +292,10 @@ static int caam_reset_hw_jr(struct device *dev)
unsigned int timeout = 100000;
/*
* FIXME: disabling IRQs here inhibits proper job completion
* and error propagation
* mask interrupts since we are going to poll
* for reset completion status
*/
disable_irq(jrp->irq);
setbits32(&jrp->rregs->rconfig_lo, JRCFG_IMSK);
/* initiate flush (required prior to reset) */
wr_reg32(&jrp->rregs->jrcommand, JRCR_RESET);
@ -320,7 +320,8 @@ static int caam_reset_hw_jr(struct device *dev)
return -EIO;
}
enable_irq(jrp->irq);
/* unmask interrupts */
clrbits32(&jrp->rregs->rconfig_lo, JRCFG_IMSK);
return 0;
}
@ -336,6 +337,21 @@ static int caam_jr_init(struct device *dev)
jrp = dev_get_drvdata(dev);
/* Connect job ring interrupt handler. */
for_each_possible_cpu(i)
tasklet_init(&jrp->irqtask[i], caam_jr_dequeue,
(unsigned long)dev);
error = request_irq(jrp->irq, caam_jr_interrupt, IRQF_SHARED,
"caam-jobr", dev);
if (error) {
dev_err(dev, "can't connect JobR %d interrupt (%d)\n",
jrp->ridx, jrp->irq);
irq_dispose_mapping(jrp->irq);
jrp->irq = 0;
return -EINVAL;
}
error = caam_reset_hw_jr(dev);
if (error)
return error;
@ -404,28 +420,6 @@ static int caam_jr_init(struct device *dev)
(JOBR_INTC_COUNT_THLD << JRCFG_ICDCT_SHIFT) |
(JOBR_INTC_TIME_THLD << JRCFG_ICTT_SHIFT));
/* Connect job ring interrupt handler. */
for_each_possible_cpu(i)
tasklet_init(&jrp->irqtask[i], caam_jr_dequeue,
(unsigned long)dev);
error = request_irq(jrp->irq, caam_jr_interrupt, 0,
"caam-jobr", dev);
if (error) {
dev_err(dev, "can't connect JobR %d interrupt (%d)\n",
jrp->ridx, jrp->irq);
irq_dispose_mapping(jrp->irq);
jrp->irq = 0;
dma_unmap_single(dev, inpbusaddr, sizeof(u32 *) * JOBR_DEPTH,
DMA_BIDIRECTIONAL);
dma_unmap_single(dev, outbusaddr, sizeof(u32 *) * JOBR_DEPTH,
DMA_BIDIRECTIONAL);
kfree(jrp->inpring);
kfree(jrp->outring);
kfree(jrp->entinfo);
return -EINVAL;
}
jrp->assign = JOBR_UNASSIGNED;
return 0;
}