[PATCH 4/4] drm/amdgpu: add ring_destroy for psp v10

[Junwei Zhang]

Signed-off-by: Junwei Zhang <Jerry.Zhang at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c |  1 +
 drivers/gpu/drm/amd/amdgpu/psp_v10_0.c  | 27 +++++++++++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/psp_v10_0.h  |  2 ++
 3 files changed, 30 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index 8f4eafc..644941d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -67,6 +67,7 @@ static int psp_sw_init(void *handle)
 		psp->prep_cmd_buf = psp_v10_0_prep_cmd_buf;
 		psp->ring_init = psp_v10_0_ring_init;
 		psp->ring_create = psp_v10_0_ring_create;
+		psp->ring_destroy = psp_v10_0_ring_destroy;
 		psp->cmd_submit = psp_v10_0_cmd_submit;
 		psp->compare_sram_data = psp_v10_0_compare_sram_data;
 		break;
diff --git a/drivers/gpu/drm/amd/amdgpu/psp_v10_0.c b/drivers/gpu/drm/amd/amdgpu/psp_v10_0.c
index fb29cd4..b4af32a3 100644
--- a/drivers/gpu/drm/amd/amdgpu/psp_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/psp_v10_0.c
@@ -210,6 +210,33 @@ int psp_v10_0_ring_create(struct psp_context *psp, enum psp_ring_type ring_type)
 	return ret;
 }
 
+int psp_v10_0_ring_destroy(struct psp_context *psp, enum psp_ring_type ring_type)
+{
+	int ret = 0;
+	struct psp_ring *ring;
+	unsigned int psp_ring_reg = 0;
+	struct amdgpu_device *adev = psp->adev;
+
+	ring = &psp->km_ring;
+
+	/* Write the ring destroy command to C2PMSG_64 */
+	psp_ring_reg = 3 << 16;
+	WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_64, psp_ring_reg);
+
+	/* There might be handshake issue with hardware which needs delay */
+	mdelay(20);
+
+	/* Wait for response flag (bit 31) in C2PMSG_64 */
+	ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, mmMP0_SMN_C2PMSG_64),
+			   0x80000000, 0x80000000, false);
+
+	if (ring->ring_mem)
+		amdgpu_bo_free_kernel(&adev->firmware.rbuf,
+				      &ring->ring_mem_mc_addr,
+				      (void **)&ring->ring_mem);
+	return ret;
+}
+
 int psp_v10_0_cmd_submit(struct psp_context *psp,
 		        struct amdgpu_firmware_info *ucode,
 		        uint64_t cmd_buf_mc_addr, uint64_t fence_mc_addr,
diff --git a/drivers/gpu/drm/amd/amdgpu/psp_v10_0.h b/drivers/gpu/drm/amd/amdgpu/psp_v10_0.h
index 7e9a8cd..e76cde2 100644
--- a/drivers/gpu/drm/amd/amdgpu/psp_v10_0.h
+++ b/drivers/gpu/drm/amd/amdgpu/psp_v10_0.h
@@ -34,6 +34,8 @@ extern int psp_v10_0_ring_init(struct psp_context *psp,
 			      enum psp_ring_type ring_type);
 extern int psp_v10_0_ring_create(struct psp_context *psp,
 				 enum psp_ring_type ring_type);
+extern int psp_v10_0_ring_destroy(struct psp_context *psp,
+				  enum psp_ring_type ring_type);
 extern int psp_v10_0_cmd_submit(struct psp_context *psp,
 			       struct amdgpu_firmware_info *ucode,
 			       uint64_t cmd_buf_mc_addr, uint64_t fence_mc_addr,
-- 
1.9.1