[PATCH 1/3] drm/amdgpu: add reset register dump function for gfx_v10_0

[Somalapuram Amaranath <Amaranath.Somalapuram@xxxxxxx>]

Implementation of register dump function when the AMD GPU resets

Signed-off-by: Somalapuram Amaranath <Amaranath.Somalapuram@xxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c   | 55 +++++++++++++++++++++++-
 drivers/gpu/drm/amd/include/amd_shared.h |  2 +
 2 files changed, 56 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index dbe7442fb25c..dbd74204f06d 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -7466,7 +7466,6 @@ static int gfx_v10_0_hw_init(void *handle)
 {
 	int r;
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
-
 	if (!amdgpu_emu_mode)
 		gfx_v10_0_init_golden_registers(adev);
 
@@ -7580,6 +7579,59 @@ static int gfx_v10_0_hw_fini(void *handle)
 	return 0;
 }
 
+static int gfx_v10_0_reset_reg_dumps(void *handle,
+		uint32_t (**dump)[2], uint32_t *n_regs, char ***r_names)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+	uint32_t i = 0;
+
+#define N_REGS (17)
+#define DUMP_REG(addr) do {				\
+		(*dump)[i][0] = (addr);			\
+		(*dump)[i++][1] = RREG32(addr);		\
+	} while (0)
+
+	char *reg_names[N_REGS] = {
+		"mmGRBM_STATUS2", "mmGRBM_STATUS_SE0", "mmGRBM_STATUS_SE1",
+		"mmGRBM_STATUS_SE2", "mmGRBM_STATUS_SE3", "mmSDMA0_STATUS_REG",
+		"mmSDMA1_STATUS_REG", "mmCP_STAT", "mmCP_STALLED_STAT1",
+		"mmCP_STALLED_STAT1", "mmCP_STALLED_STAT3", "mmCP_CPC_STATUS",
+		"mmCP_CPC_BUSY_STAT", "mmCP_CPC_STALLED_STAT1", "mmCP_CPF_STATUS",
+		"mmCP_CPF_BUSY_STAT", "mmCP_CPF_STALLED_STAT1"
+	};
+
+	*dump = kmalloc(N_REGS*2*sizeof(uint32_t), GFP_KERNEL);
+	if (*dump == NULL)
+		return -ENOMEM;
+	DUMP_REG(mmGRBM_STATUS2);
+	DUMP_REG(mmGRBM_STATUS_SE0);
+	DUMP_REG(mmGRBM_STATUS_SE1);
+	DUMP_REG(mmGRBM_STATUS_SE2);
+	DUMP_REG(mmGRBM_STATUS_SE3);
+	DUMP_REG(mmSDMA0_STATUS_REG);
+	DUMP_REG(mmSDMA1_STATUS_REG);
+	DUMP_REG(mmCP_STAT);
+	DUMP_REG(mmCP_STALLED_STAT1);
+	DUMP_REG(mmCP_STALLED_STAT1);
+	DUMP_REG(mmCP_STALLED_STAT3);
+	DUMP_REG(mmCP_CPC_STATUS);
+	DUMP_REG(mmCP_CPC_BUSY_STAT);
+	DUMP_REG(mmCP_CPC_STALLED_STAT1);
+	DUMP_REG(mmCP_CPF_STATUS);
+	DUMP_REG(mmCP_CPF_BUSY_STAT);
+	DUMP_REG(mmCP_CPF_STALLED_STAT1);
+
+	*n_regs = i;
+
+	(*r_names) = kcalloc(N_REGS, sizeof(char *), GFP_KERNEL);
+	for (i = 0; i < N_REGS; i++) {
+		(*r_names)[i] = kcalloc(30, sizeof(char), GFP_KERNEL);
+		strcpy((*r_names)[i], reg_names[i]);
+	}
+
+	return 0;
+}
+
 static int gfx_v10_0_suspend(void *handle)
 {
 	return gfx_v10_0_hw_fini(handle);
@@ -9359,6 +9411,7 @@ static const struct amd_ip_funcs gfx_v10_0_ip_funcs = {
 	.set_clockgating_state = gfx_v10_0_set_clockgating_state,
 	.set_powergating_state = gfx_v10_0_set_powergating_state,
 	.get_clockgating_state = gfx_v10_0_get_clockgating_state,
+	.reset_reg_dumps = gfx_v10_0_reset_reg_dumps,
 };
 
 static const struct amdgpu_ring_funcs gfx_v10_0_ring_funcs_gfx = {
diff --git a/drivers/gpu/drm/amd/include/amd_shared.h b/drivers/gpu/drm/amd/include/amd_shared.h
index 4b9e68a79f06..98291a8f57dd 100644
--- a/drivers/gpu/drm/amd/include/amd_shared.h
+++ b/drivers/gpu/drm/amd/include/amd_shared.h
@@ -298,6 +298,8 @@ struct amd_ip_funcs {
 				     enum amd_powergating_state state);
 	void (*get_clockgating_state)(void *handle, u32 *flags);
 	int (*enable_umd_pstate)(void *handle, enum amd_dpm_forced_level *level);
+	int (*reset_reg_dumps)(void *handle,
+			uint32_t (**dump)[2], uint32_t *n_regs, char ***r_names);
 };
 
 
-- 
2.25.1