diff options
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/hisilicon/qm.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c index 754ddb5dec21..735c8b07b1e9 100644 --- a/drivers/crypto/hisilicon/qm.c +++ b/drivers/crypto/hisilicon/qm.c @@ -2142,6 +2142,42 @@ static void qm_trigger_pf_interrupt(struct hisi_qm *qm) writel(val, qm->io_base + QM_IFC_INT_SET_V); } +static int qm_ping_single_vf(struct hisi_qm *qm, u64 cmd, u32 fun_num) +{ + struct device *dev = &qm->pdev->dev; + struct qm_mailbox mailbox; + int cnt = 0; + u64 val; + int ret; + + qm_mb_pre_init(&mailbox, QM_MB_CMD_SRC, cmd, fun_num, 0); + mutex_lock(&qm->mailbox_lock); + ret = qm_mb_nolock(qm, &mailbox); + if (ret) { + dev_err(dev, "failed to send command to vf(%u)!\n", fun_num); + goto err_unlock; + } + + qm_trigger_vf_interrupt(qm, fun_num); + while (true) { + msleep(QM_WAIT_DST_ACK); + val = readq(qm->io_base + QM_IFC_READY_STATUS); + /* if VF respond, PF notifies VF successfully. */ + if (!(val & BIT(fun_num))) + goto err_unlock; + + if (++cnt > QM_MAX_PF_WAIT_COUNT) { + dev_err(dev, "failed to get response from VF(%u)!\n", fun_num); + ret = -ETIMEDOUT; + break; + } + } + +err_unlock: + mutex_unlock(&qm->mailbox_lock); + return ret; +} + static int qm_ping_all_vfs(struct hisi_qm *qm, u64 cmd) { struct device *dev = &qm->pdev->dev; |