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crypto: talitos - properly lock access to global talitos registers

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Access to global talitos registers must be protected for the case when
affinities are configured such that primary and secondary talitos irqs
run on different cpus.

Signed-off-by: Horia Geanta <horia.geanta@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Horia Geanta 2012-03-30 17:49:53 +03:00 committed by Herbert Xu
parent 75258723da
commit 511d63cb19
1 changed files with 17 additions and 3 deletions
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20
drivers/crypto/talitos.c
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@ -124,6 +124,9 @@ struct talitos_private {
void __iomem *reg;
int irq[2];
/* SEC global registers lock */
spinlock_t reg_lock ____cacheline_aligned;
/* SEC version geometry (from device tree node) */
unsigned int num_channels;
unsigned int chfifo_len;
@ -412,6 +415,7 @@ static void talitos_done_##name(unsigned long data) \
{ \
struct device *dev = (struct device *)data; \
struct talitos_private *priv = dev_get_drvdata(dev); \
unsigned long flags; \
\
if (ch_done_mask & 1) \
flush_channel(dev, 0, 0, 0); \
@ -427,8 +431,10 @@ static void talitos_done_##name(unsigned long data) \
out: \
/* At this point, all completed channels have been processed */ \
/* Unmask done interrupts for channels completed later on. */ \
spin_lock_irqsave(&priv->reg_lock, flags); \
setbits32(priv->reg + TALITOS_IMR, ch_done_mask); \
setbits32(priv->reg + TALITOS_IMR_LO, TALITOS_IMR_LO_INIT); \
spin_unlock_irqrestore(&priv->reg_lock, flags); \
}
DEF_TALITOS_DONE(4ch, TALITOS_ISR_4CHDONE)
DEF_TALITOS_DONE(ch0_2, TALITOS_ISR_CH_0_2_DONE)
@ -619,21 +625,27 @@ static irqreturn_t talitos_interrupt_##name(int irq, void *data) \
struct device *dev = data; \
struct talitos_private *priv = dev_get_drvdata(dev); \
u32 isr, isr_lo; \
unsigned long flags; \
\
spin_lock_irqsave(&priv->reg_lock, flags); \
isr = in_be32(priv->reg + TALITOS_ISR); \
isr_lo = in_be32(priv->reg + TALITOS_ISR_LO); \
/* Acknowledge interrupt */ \
out_be32(priv->reg + TALITOS_ICR, isr & (ch_done_mask | ch_err_mask)); \
out_be32(priv->reg + TALITOS_ICR_LO, isr_lo); \
\
if (unlikely((isr & ~TALITOS_ISR_4CHDONE) & ch_err_mask || isr_lo)) \
talitos_error(dev, isr, isr_lo); \
else \
if (unlikely(isr & ch_err_mask || isr_lo)) { \
spin_unlock_irqrestore(&priv->reg_lock, flags); \
talitos_error(dev, isr & ch_err_mask, isr_lo); \
} \
else { \
if (likely(isr & ch_done_mask)) { \
/* mask further done interrupts. */ \
clrbits32(priv->reg + TALITOS_IMR, ch_done_mask); \
/* done_task will unmask done interrupts at exit */ \
tasklet_schedule(&priv->done_task[tlet]); \
} \
spin_unlock_irqrestore(&priv->reg_lock, flags); \
} \
\
return (isr & (ch_done_mask | ch_err_mask) || isr_lo) ? IRQ_HANDLED : \
@ -2719,6 +2731,8 @@ static int talitos_probe(struct platform_device *ofdev)
priv->ofdev = ofdev;
spin_lock_init(&priv->reg_lock);
err = talitos_probe_irq(ofdev);
if (err)
goto err_out;