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authorKai Ye <yekai13@huawei.com>2021-06-11 12:06:46 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2021-06-17 10:07:31 +0300
commit2966d9d3078c623f48054ef1bfe9a975e5d1fe0c (patch)
tree75f6e347b230d59977358ff9b2d7a1ce9d738f6e /drivers/crypto
parent362c50bad3a792969f8142372a0813aadee89a61 (diff)
downloadlinux-2966d9d3078c623f48054ef1bfe9a975e5d1fe0c.tar.xz
crypto: hisilicon/qm - add pf ping single vf function
According to the function communication, add pf ping single vf function to be used in the vf read QoS. Signed-off-by: Kai Ye <yekai13@huawei.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/hisilicon/qm.c36
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;