[PATCH] drm/amdgpu/sriov: Add clear vf fw support

[Emily Deng]

Guest VM issue the PSP clear_vf_fw command at 2 points:
1.On VF driver loading, after VF message PSP to setup rings,
the next command is “clear_vf_fw”
2.On VF driver unload before VF message to
destroy rings

Change-Id: Ia31add38a69037d1cbbf9b48ad827fa63b4860f7
Signed-off-by: Emily Deng <Emily.Deng at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 37 +++++++++++++++++++++++++++++++--
 drivers/gpu/drm/amd/amdgpu/psp_gfx_if.h |  8 +++++++
 2 files changed, 43 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index cdd65b5..6055849 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -270,8 +270,9 @@ psp_cmd_submit_buf(struct psp_context *psp,
 		amdgpu_asic_invalidate_hdp(psp->adev, NULL);
 	}
 
-	/* We allow TEE_ERROR_NOT_SUPPORTED for VMR command in SRIOV */
-	skip_unsupport = (psp->cmd_buf_mem->resp.status == 0xffff000a) && amdgpu_sriov_vf(psp->adev);
+	/* We allow TEE_ERROR_NOT_SUPPORTED for VMR command and PSP_ERR_UNKNOWN_COMMAND in SRIOV */
+	skip_unsupport = (psp->cmd_buf_mem->resp.status == TEE_ERROR_NOT_SUPPORTED ||
+		psp->cmd_buf_mem->resp.status == PSP_ERR_UNKNOWN_COMMAND) && amdgpu_sriov_vf(psp->adev);
 
 	/* In some cases, psp response status is not 0 even there is no
 	 * problem while the command is submitted. Some version of PSP FW
@@ -389,6 +390,26 @@ static int psp_tmr_init(struct psp_context *psp)
 	return ret;
 }
 
+static int psp_clear_vf_fw(struct psp_context *psp)
+{
+	int ret;
+	struct psp_gfx_cmd_resp *cmd;
+
+	if (!amdgpu_sriov_vf(psp->adev) || psp->adev->asic_type != CHIP_NAVI12)
+		return 0;
+
+	cmd = kzalloc(sizeof(struct psp_gfx_cmd_resp), GFP_KERNEL);
+	if (!cmd)
+		return -ENOMEM;
+
+	cmd->cmd_id = GFX_CMD_ID_CLEAR_VF_FW;
+
+	ret = psp_cmd_submit_buf(psp, NULL, cmd, psp->fence_buf_mc_addr);
+	kfree(cmd);
+
+	return ret;
+}
+
 static int psp_tmr_load(struct psp_context *psp)
 {
 	int ret;
@@ -1382,6 +1403,12 @@ static int psp_hw_start(struct psp_context *psp)
 		return ret;
 	}
 
+	ret = psp_clear_vf_fw(psp);
+	if (ret) {
+		DRM_ERROR("PSP clear vf fw!\n");
+		return ret;
+	}
+
 	ret = psp_tmr_init(psp);
 	if (ret) {
 		DRM_ERROR("PSP tmr init failed!\n");
@@ -1843,6 +1870,7 @@ static int psp_hw_fini(void *handle)
 	struct psp_context *psp = &adev->psp;
 	void *tmr_buf;
 	void **pptr;
+	int ret;
 
 	if (psp->adev->psp.ta_fw) {
 		psp_ras_terminate(psp);
@@ -1851,6 +1879,11 @@ static int psp_hw_fini(void *handle)
 	}
 
 	psp_asd_unload(psp);
+	ret = psp_clear_vf_fw(psp);
+	if (ret) {
+		DRM_ERROR("PSP clear vf fw!\n");
+		return ret;
+	}
 
 	psp_ring_destroy(psp, PSP_RING_TYPE__KM);
 
diff --git a/drivers/gpu/drm/amd/amdgpu/psp_gfx_if.h b/drivers/gpu/drm/amd/amdgpu/psp_gfx_if.h
index a44fd60..cbc04a5 100644
--- a/drivers/gpu/drm/amd/amdgpu/psp_gfx_if.h
+++ b/drivers/gpu/drm/amd/amdgpu/psp_gfx_if.h
@@ -110,6 +110,7 @@ enum psp_gfx_cmd_id
     GFX_CMD_ID_SETUP_VMR    = 0x00000009,   /* setup VMR region */
     GFX_CMD_ID_DESTROY_VMR  = 0x0000000A,   /* destroy VMR region */
     GFX_CMD_ID_PROG_REG     = 0x0000000B,   /* program regs */
+    GFX_CMD_ID_CLEAR_VF_FW  = 0x0000000D,   /* Clear VF FW, to be used on VF shutdown. */
     /* IDs upto 0x1F are reserved for older programs (Raven, Vega 10/12/20) */
     GFX_CMD_ID_LOAD_TOC     = 0x00000020,   /* Load TOC and obtain TMR size */
     GFX_CMD_ID_AUTOLOAD_RLC = 0x00000021,   /* Indicates all graphics fw loaded, start RLC autoload */
@@ -365,4 +366,11 @@ struct psp_gfx_rb_frame
                 /* total 64 bytes */
 };
 
+#define PSP_ERR_UNKNOWN_COMMAND 0x00000100
+
+enum tee_error_code {
+    TEE_SUCCESS                         = 0x00000000,
+    TEE_ERROR_NOT_SUPPORTED             = 0xFFFF000A,
+};
+
 #endif /* _PSP_TEE_GFX_IF_H_ */
-- 
2.7.4