[PATCH 3/4] drm/amdgpu: add ring_create function 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  | 31 +++++++++++++++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/psp_v10_0.h  |  2 ++
 3 files changed, 34 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index dc95633..8f4eafc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -66,6 +66,7 @@ static int psp_sw_init(void *handle)
 		psp->init_microcode = psp_v10_0_init_microcode;
 		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->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 7513f9c..fb29cd4 100644
--- a/drivers/gpu/drm/amd/amdgpu/psp_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/psp_v10_0.c
@@ -179,6 +179,37 @@ int psp_v10_0_ring_init(struct psp_context *psp, enum psp_ring_type ring_type)
 	return 0;
 }
 
+int psp_v10_0_ring_create(struct psp_context *psp, enum psp_ring_type ring_type)
+{
+	int ret = 0;
+	unsigned int psp_ring_reg = 0;
+	struct psp_ring *ring = &psp->km_ring;
+	struct amdgpu_device *adev = psp->adev;
+
+	/* Write low address of the ring to C2PMSG_69 */
+	psp_ring_reg = lower_32_bits(ring->ring_mem_mc_addr);
+	WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_69, psp_ring_reg);
+	/* Write high address of the ring to C2PMSG_70 */
+	psp_ring_reg = upper_32_bits(ring->ring_mem_mc_addr);
+	WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_70, psp_ring_reg);
+	/* Write size of ring to C2PMSG_71 */
+	psp_ring_reg = ring->ring_size;
+	WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_71, psp_ring_reg);
+	/* Write the ring initialization command to C2PMSG_64 */
+	psp_ring_reg = ring_type;
+	psp_ring_reg = psp_ring_reg << 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, 0x8000FFFF, false);
+
+	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 2f5a314e..7e9a8cd 100644
--- a/drivers/gpu/drm/amd/amdgpu/psp_v10_0.h
+++ b/drivers/gpu/drm/amd/amdgpu/psp_v10_0.h
@@ -32,6 +32,8 @@ extern int psp_v10_0_prep_cmd_buf(struct amdgpu_firmware_info *ucode,
 				 struct psp_gfx_cmd_resp *cmd);
 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_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