[AMD Public Use]

Series is:
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
________________________________
From: amd-gfx <amd-gfx-bounces@lists.freedesktop.org> on behalf of Huang Rui <ray.huang@amd.com>
Sent: Tuesday, June 30, 2020 6:30 AM
To: amd-gfx@lists.freedesktop.org <amd-gfx@lists.freedesktop.org>
Cc: Huang, Ray <Ray.Huang@amd.com>
Subject: [PATCH 2/2] drm/amdgpu: add TMR destory function for psp

TMR is required to be destoried with GFX_CMD_ID_DESTROY_TMR while the
system goes to suspend. Otherwise, PSP may return the failure state
(0xFFFF007) on Gfx-2-PSP command GFX_CMD_ID_SETUP_TMR after do multiple
times suspend/resume.

Signed-off-by: Huang Rui <ray.huang@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 57 +++++++++++++++++++++++--
 1 file changed, 53 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index e57a53d5ca96..23ebb50b1a19 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -430,6 +430,52 @@ static int psp_tmr_load(struct psp_context *psp)
         return ret;
 }

+static void psp_prep_tmr_unload_cmd_buf(struct psp_context *psp,
+                                       struct psp_gfx_cmd_resp *cmd)
+{
+       if (amdgpu_sriov_vf(psp->adev))
+               cmd->cmd_id = GFX_CMD_ID_DESTROY_VMR;
+       else
+               cmd->cmd_id = GFX_CMD_ID_DESTROY_TMR;
+}
+
+static int psp_tmr_unload(struct psp_context *psp)
+{
+       int ret;
+       struct psp_gfx_cmd_resp *cmd;
+
+       cmd = kzalloc(sizeof(struct psp_gfx_cmd_resp), GFP_KERNEL);
+       if (!cmd)
+               return -ENOMEM;
+
+       psp_prep_tmr_unload_cmd_buf(psp, cmd);
+       DRM_INFO("free PSP TMR buffer\n");
+
+       ret = psp_cmd_submit_buf(psp, NULL, cmd,
+                                psp->fence_buf_mc_addr);
+
+       kfree(cmd);
+
+       return ret;
+}
+
+static int psp_tmr_terminate(struct psp_context *psp)
+{
+       int ret;
+       void *tmr_buf;
+       void **pptr;
+
+       ret = psp_tmr_unload(psp);
+       if (ret)
+               return ret;
+
+       /* free TMR memory buffer */
+       pptr = amdgpu_sriov_vf(psp->adev) ? &tmr_buf : NULL;
+       amdgpu_bo_free_kernel(&psp->tmr_bo, &psp->tmr_mc_addr, pptr);
+
+       return 0;
+}
+
 static void psp_prep_asd_load_cmd_buf(struct psp_gfx_cmd_resp *cmd,
                                 uint64_t asd_mc, uint32_t size)
 {
@@ -1866,8 +1912,6 @@ static int psp_hw_fini(void *handle)
 {
         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
         struct psp_context *psp = &adev->psp;
-       void *tmr_buf;
-       void **pptr;
         int ret;

         if (psp->adev->psp.ta_fw) {
@@ -1883,10 +1927,9 @@ static int psp_hw_fini(void *handle)
                 return ret;
         }

+       psp_tmr_terminate(psp);
         psp_ring_destroy(psp, PSP_RING_TYPE__KM);

-       pptr = amdgpu_sriov_vf(psp->adev) ? &tmr_buf : NULL;
-       amdgpu_bo_free_kernel(&psp->tmr_bo, &psp->tmr_mc_addr, pptr);
         amdgpu_bo_free_kernel(&psp->fw_pri_bo,
                               &psp->fw_pri_mc_addr, &psp->fw_pri_buf);
         amdgpu_bo_free_kernel(&psp->fence_buf_bo,
@@ -1939,6 +1982,12 @@ static int psp_suspend(void *handle)
                 return ret;
         }

+       ret = psp_tmr_terminate(psp);
+       if (ret) {
+               DRM_ERROR("Falied to terminate tmr\n");
+               return ret;
+       }
+
         ret = psp_ring_stop(psp, PSP_RING_TYPE__KM);
         if (ret) {
                 DRM_ERROR("PSP ring stop failed\n");
--
2.25.1

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