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octeontx2-af: recover CPT engine when it gets fault
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When CPT engine has uncorrectable errors, it will get halted and
must be disabled and re-enabled. This patch adds code for the same.

Signed-off-by: Srujana Challa <schalla@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Srujana Challa authored and David S. Miller committed Jan 20, 2023
1 parent 6c977c5 commit 07ea567
Showing 1 changed file with 80 additions and 30 deletions.
110 changes: 80 additions & 30 deletions drivers/net/ethernet/marvell/octeontx2/af/rvu_cpt.c
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Original file line number Diff line number Diff line change
Expand Up @@ -37,34 +37,60 @@
(_rsp)->free_sts_##etype = free_sts; \
})

static irqreturn_t rvu_cpt_af_flt_intr_handler(int irq, void *ptr)
static irqreturn_t cpt_af_flt_intr_handler(int vec, void *ptr)
{
struct rvu_block *block = ptr;
struct rvu *rvu = block->rvu;
int blkaddr = block->addr;
u64 reg0, reg1, reg2;

reg0 = rvu_read64(rvu, blkaddr, CPT_AF_FLTX_INT(0));
reg1 = rvu_read64(rvu, blkaddr, CPT_AF_FLTX_INT(1));
if (!is_rvu_otx2(rvu)) {
reg2 = rvu_read64(rvu, blkaddr, CPT_AF_FLTX_INT(2));
dev_err_ratelimited(rvu->dev,
"Received CPTAF FLT irq : 0x%llx, 0x%llx, 0x%llx",
reg0, reg1, reg2);
} else {
dev_err_ratelimited(rvu->dev,
"Received CPTAF FLT irq : 0x%llx, 0x%llx",
reg0, reg1);
u64 reg, val;
int i, eng;
u8 grp;

reg = rvu_read64(rvu, blkaddr, CPT_AF_FLTX_INT(vec));
dev_err_ratelimited(rvu->dev, "Received CPTAF FLT%d irq : 0x%llx", vec, reg);

i = -1;
while ((i = find_next_bit((unsigned long *)&reg, 64, i + 1)) < 64) {
switch (vec) {
case 0:
eng = i;
break;
case 1:
eng = i + 64;
break;
case 2:
eng = i + 128;
break;
}
grp = rvu_read64(rvu, blkaddr, CPT_AF_EXEX_CTL2(eng)) & 0xFF;
/* Disable and enable the engine which triggers fault */
rvu_write64(rvu, blkaddr, CPT_AF_EXEX_CTL2(eng), 0x0);
val = rvu_read64(rvu, blkaddr, CPT_AF_EXEX_CTL(eng));
rvu_write64(rvu, blkaddr, CPT_AF_EXEX_CTL(eng), val & ~1ULL);

rvu_write64(rvu, blkaddr, CPT_AF_EXEX_CTL2(eng), grp);
rvu_write64(rvu, blkaddr, CPT_AF_EXEX_CTL(eng), val | 1ULL);
}

rvu_write64(rvu, blkaddr, CPT_AF_FLTX_INT(0), reg0);
rvu_write64(rvu, blkaddr, CPT_AF_FLTX_INT(1), reg1);
if (!is_rvu_otx2(rvu))
rvu_write64(rvu, blkaddr, CPT_AF_FLTX_INT(2), reg2);
rvu_write64(rvu, blkaddr, CPT_AF_FLTX_INT(vec), reg);

return IRQ_HANDLED;
}

static irqreturn_t rvu_cpt_af_flt0_intr_handler(int irq, void *ptr)
{
return cpt_af_flt_intr_handler(CPT_AF_INT_VEC_FLT0, ptr);
}

static irqreturn_t rvu_cpt_af_flt1_intr_handler(int irq, void *ptr)
{
return cpt_af_flt_intr_handler(CPT_AF_INT_VEC_FLT1, ptr);
}

static irqreturn_t rvu_cpt_af_flt2_intr_handler(int irq, void *ptr)
{
return cpt_af_flt_intr_handler(CPT_10K_AF_INT_VEC_FLT2, ptr);
}

static irqreturn_t rvu_cpt_af_rvu_intr_handler(int irq, void *ptr)
{
struct rvu_block *block = ptr;
Expand Down Expand Up @@ -119,8 +145,10 @@ static void cpt_10k_unregister_interrupts(struct rvu_block *block, int off)
int i;

/* Disable all CPT AF interrupts */
for (i = 0; i < CPT_10K_AF_INT_VEC_RVU; i++)
rvu_write64(rvu, blkaddr, CPT_AF_FLTX_INT_ENA_W1C(i), 0x1);
rvu_write64(rvu, blkaddr, CPT_AF_FLTX_INT_ENA_W1C(0), ~0ULL);
rvu_write64(rvu, blkaddr, CPT_AF_FLTX_INT_ENA_W1C(1), ~0ULL);
rvu_write64(rvu, blkaddr, CPT_AF_FLTX_INT_ENA_W1C(2), 0xFFFF);

rvu_write64(rvu, blkaddr, CPT_AF_RVU_INT_ENA_W1C, 0x1);
rvu_write64(rvu, blkaddr, CPT_AF_RAS_INT_ENA_W1C, 0x1);

Expand Down Expand Up @@ -151,7 +179,7 @@ static void cpt_unregister_interrupts(struct rvu *rvu, int blkaddr)

/* Disable all CPT AF interrupts */
for (i = 0; i < CPT_AF_INT_VEC_RVU; i++)
rvu_write64(rvu, blkaddr, CPT_AF_FLTX_INT_ENA_W1C(i), 0x1);
rvu_write64(rvu, blkaddr, CPT_AF_FLTX_INT_ENA_W1C(i), ~0ULL);
rvu_write64(rvu, blkaddr, CPT_AF_RVU_INT_ENA_W1C, 0x1);
rvu_write64(rvu, blkaddr, CPT_AF_RAS_INT_ENA_W1C, 0x1);

Expand All @@ -172,16 +200,31 @@ static int cpt_10k_register_interrupts(struct rvu_block *block, int off)
{
struct rvu *rvu = block->rvu;
int blkaddr = block->addr;
irq_handler_t flt_fn;
int i, ret;

for (i = CPT_10K_AF_INT_VEC_FLT0; i < CPT_10K_AF_INT_VEC_RVU; i++) {
sprintf(&rvu->irq_name[(off + i) * NAME_SIZE], "CPTAF FLT%d", i);

switch (i) {
case CPT_10K_AF_INT_VEC_FLT0:
flt_fn = rvu_cpt_af_flt0_intr_handler;
break;
case CPT_10K_AF_INT_VEC_FLT1:
flt_fn = rvu_cpt_af_flt1_intr_handler;
break;
case CPT_10K_AF_INT_VEC_FLT2:
flt_fn = rvu_cpt_af_flt2_intr_handler;
break;
}
ret = rvu_cpt_do_register_interrupt(block, off + i,
rvu_cpt_af_flt_intr_handler,
&rvu->irq_name[(off + i) * NAME_SIZE]);
flt_fn, &rvu->irq_name[(off + i) * NAME_SIZE]);
if (ret)
goto err;
rvu_write64(rvu, blkaddr, CPT_AF_FLTX_INT_ENA_W1S(i), 0x1);
if (i == CPT_10K_AF_INT_VEC_FLT2)
rvu_write64(rvu, blkaddr, CPT_AF_FLTX_INT_ENA_W1S(i), 0xFFFF);
else
rvu_write64(rvu, blkaddr, CPT_AF_FLTX_INT_ENA_W1S(i), ~0ULL);
}

ret = rvu_cpt_do_register_interrupt(block, off + CPT_10K_AF_INT_VEC_RVU,
Expand All @@ -208,8 +251,8 @@ static int cpt_register_interrupts(struct rvu *rvu, int blkaddr)
{
struct rvu_hwinfo *hw = rvu->hw;
struct rvu_block *block;
irq_handler_t flt_fn;
int i, offs, ret = 0;
char irq_name[16];

if (!is_block_implemented(rvu->hw, blkaddr))
return 0;
Expand All @@ -226,13 +269,20 @@ static int cpt_register_interrupts(struct rvu *rvu, int blkaddr)
return cpt_10k_register_interrupts(block, offs);

for (i = CPT_AF_INT_VEC_FLT0; i < CPT_AF_INT_VEC_RVU; i++) {
snprintf(irq_name, sizeof(irq_name), "CPTAF FLT%d", i);
sprintf(&rvu->irq_name[(offs + i) * NAME_SIZE], "CPTAF FLT%d", i);
switch (i) {
case CPT_AF_INT_VEC_FLT0:
flt_fn = rvu_cpt_af_flt0_intr_handler;
break;
case CPT_AF_INT_VEC_FLT1:
flt_fn = rvu_cpt_af_flt1_intr_handler;
break;
}
ret = rvu_cpt_do_register_interrupt(block, offs + i,
rvu_cpt_af_flt_intr_handler,
irq_name);
flt_fn, &rvu->irq_name[(offs + i) * NAME_SIZE]);
if (ret)
goto err;
rvu_write64(rvu, blkaddr, CPT_AF_FLTX_INT_ENA_W1S(i), 0x1);
rvu_write64(rvu, blkaddr, CPT_AF_FLTX_INT_ENA_W1S(i), ~0ULL);
}

ret = rvu_cpt_do_register_interrupt(block, offs + CPT_AF_INT_VEC_RVU,
Expand Down

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