drm/amdgpu: Extend full access wait time in guest

- Extend wait time and add retry, currently 6s * 2times
- Change timing algorithm

Signed-off-by: Victor Zhao <Victor.Zhao@amd.com>
Signed-off-by: Peng Ju Zhou <PengJu.Zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c b/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
index 9f7aac4..b48e68f 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
+++ b/drivers/gpu/drm/amd/amdgpu/mxgpu_nv.c
@@ -96,7 +96,11 @@ static int xgpu_nv_poll_ack(struct amdgpu_device *adev)
 
 static int xgpu_nv_poll_msg(struct amdgpu_device *adev, enum idh_event event)
 {
-       int r, timeout = NV_MAILBOX_POLL_MSG_TIMEDOUT;
+       int r;
+       uint64_t timeout, now;
+
+       now = (uint64_t)ktime_to_ms(ktime_get());
+       timeout = now + NV_MAILBOX_POLL_MSG_TIMEDOUT;
 
        do {
                r = xgpu_nv_mailbox_rcv_msg(adev, event);
@@ -104,8 +108,8 @@ static int xgpu_nv_poll_msg(struct amdgpu_device *adev, enum idh_event event)
                        return 0;
 
                msleep(10);
-               timeout -= 10;
-       } while (timeout > 1);
+               now = (uint64_t)ktime_to_ms(ktime_get());
+       } while (timeout > now);
 
 
        return -ETIME;
@@ -149,9 +153,10 @@ static void xgpu_nv_mailbox_trans_msg (struct amdgpu_device *adev,
 static int xgpu_nv_send_access_requests(struct amdgpu_device *adev,
                                        enum idh_request req)
 {
-       int r;
+       int r, retry = 1;
        enum idh_event event = -1;
 
+send_request:
        xgpu_nv_mailbox_trans_msg(adev, req, 0, 0, 0);
 
        switch (req) {
@@ -170,6 +175,9 @@ static int xgpu_nv_send_access_requests(struct amdgpu_device *adev,
        if (event != -1) {
                r = xgpu_nv_poll_msg(adev, event);
                if (r) {
+                       if (retry++ < 2)
+                               goto send_request;
+
                        if (req != IDH_REQ_GPU_INIT_DATA) {
                                pr_err("Doesn't get msg:%d from pf, error=%d\n", event, r);
                                return r;