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crypto: hisilicon/qm - reset function if event queue overflows 

If the hardware reports the event queue overflow by the abnormal interrupt,
the driver needs to reset the function and re-enable the event queue
interrupt and abnormal interrupt.

Signed-off-by: Weili Qian <qianweili@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Weili Qian 2021-12-11 19:25:18 +08:00 committed by Herbert Xu
parent a0a9486beb
commit 95f0b6d536
1 changed files with 57 additions and 11 deletions
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68
drivers/crypto/hisilicon/qm.c
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@ -89,6 +89,7 @@
#define QM_AEQE_PHASE(aeqe) ((le32_to_cpu((aeqe)->dw0) >> 16) & 0x1)
#define QM_AEQE_TYPE_SHIFT 17
#define QM_EQ_OVERFLOW 1
#define QM_DOORBELL_CMD_SQ 0
#define QM_DOORBELL_CMD_CQ 1
@ -988,6 +989,35 @@ static void qm_set_qp_disable(struct hisi_qp *qp, int offset)
mb();
}
static void qm_reset_function(struct hisi_qm *qm)
{
struct hisi_qm *pf_qm = pci_get_drvdata(pci_physfn(qm->pdev));
struct device *dev = &qm->pdev->dev;
int ret;
if (qm_check_dev_error(pf_qm))
return;
ret = qm_reset_prepare_ready(qm);
if (ret) {
dev_err(dev, "reset function not ready\n");
return;
}
ret = hisi_qm_stop(qm, QM_FLR);
if (ret) {
dev_err(dev, "failed to stop qm when reset function\n");
goto clear_bit;
}
ret = hisi_qm_start(qm);
if (ret)
dev_err(dev, "failed to start qm when reset function\n");
clear_bit:
qm_reset_bit_clear(qm);
}
static irqreturn_t qm_aeq_thread(int irq, void *data)
{
struct hisi_qm *qm = data;
@ -996,12 +1026,17 @@ static irqreturn_t qm_aeq_thread(int irq, void *data)
while (QM_AEQE_PHASE(aeqe) == qm->status.aeqc_phase) {
type = le32_to_cpu(aeqe->dw0) >> QM_AEQE_TYPE_SHIFT;
if (type < ARRAY_SIZE(qm_fifo_overflow))
dev_err(&qm->pdev->dev, "%s overflow\n",
qm_fifo_overflow[type]);
else
switch (type) {
case QM_EQ_OVERFLOW:
dev_err(&qm->pdev->dev, "eq overflow, reset function\n");
qm_reset_function(qm);
return IRQ_HANDLED;
default:
dev_err(&qm->pdev->dev, "unknown error type %u\n",
type);
break;
}
if (qm->status.aeq_head == QM_Q_DEPTH - 1) {
qm->status.aeqc_phase = !qm->status.aeqc_phase;
@ -3545,6 +3580,22 @@ static void qm_init_eq_aeq_status(struct hisi_qm *qm)
status->aeqc_phase = true;
}
static void qm_enable_eq_aeq_interrupts(struct hisi_qm *qm)
{
/* Clear eq/aeq interrupt source */
qm_db(qm, 0, QM_DOORBELL_CMD_AEQ, qm->status.aeq_head, 0);
qm_db(qm, 0, QM_DOORBELL_CMD_EQ, qm->status.eq_head, 0);
writel(0x0, qm->io_base + QM_VF_EQ_INT_MASK);
writel(0x0, qm->io_base + QM_VF_AEQ_INT_MASK);
}
static void qm_disable_eq_aeq_interrupts(struct hisi_qm *qm)
{
writel(0x1, qm->io_base + QM_VF_EQ_INT_MASK);
writel(0x1, qm->io_base + QM_VF_AEQ_INT_MASK);
}
static int qm_eq_ctx_cfg(struct hisi_qm *qm)
{
struct device *dev = &qm->pdev->dev;
@ -3646,9 +3697,7 @@ static int __hisi_qm_start(struct hisi_qm *qm)
return ret;
qm_init_prefetch(qm);
writel(0x0, qm->io_base + QM_VF_EQ_INT_MASK);
writel(0x0, qm->io_base + QM_VF_AEQ_INT_MASK);
qm_enable_eq_aeq_interrupts(qm);
return 0;
}
@ -3796,10 +3845,7 @@ int hisi_qm_stop(struct hisi_qm *qm, enum qm_stop_reason r)
hisi_qm_set_hw_reset(qm, QM_RESET_STOP_RX_OFFSET);
}
/* Mask eq and aeq irq */
writel(0x1, qm->io_base + QM_VF_EQ_INT_MASK);
writel(0x1, qm->io_base + QM_VF_AEQ_INT_MASK);
qm_disable_eq_aeq_interrupts(qm);
if (qm->fun_type == QM_HW_PF) {
ret = hisi_qm_set_vft(qm, 0, 0, 0);
if (ret < 0) {