gpu: nvgpu: expose local-to-logical/physical GPC mappings

Expose the local-to-logical/physical GPC mappings for
devtools needs.

Bug 3944943

Change-Id: I2aa69ccef19627d41f3e2b8dcc9235401ae1f782
Signed-off-by: Martin Radev <mradev@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2900289
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>

drivers/gpu/nvgpu/os/linux/ioctl_ctrl.c

@@ -778,6 +778,74 @@ clean_up:
 	return err;
 }
 
+static int gk20a_ctrl_get_gpc_local_to_physical_map(struct gk20a *g, struct nvgpu_gr_config *gr_config,
+	u32 gr_instance_id, struct nvgpu_gpu_get_gpc_physical_map_args *args)
+{
+	u32 gpc_count;
+	u32 map_size;
+	u32 gpc_local_index;
+	u32 *physical_map;
+
+	gpc_count = nvgpu_gr_config_get_gpc_count(gr_config);
+	map_size = sizeof(u32) * gpc_count;
+
+	if (map_size != args->map_buf_size) {
+		return -EINVAL;
+	}
+
+	physical_map = (u32 *)nvgpu_kzalloc(g, map_size);
+	if (physical_map == NULL) {
+		return -ENOMEM;
+	}
+
+	for (gpc_local_index = 0U; gpc_local_index < gpc_count; ++gpc_local_index) {
+		physical_map[gpc_local_index] = nvgpu_grmgr_get_gr_gpc_phys_id(g, gr_instance_id, gpc_local_index);
+	}
+
+	if (copy_to_user((void __user *)(uintptr_t)args->physical_gpc_buf_addr, physical_map, map_size)) {
+		nvgpu_kfree(g, physical_map);
+		return -EFAULT;
+	}
+
+	nvgpu_kfree(g, physical_map);
+
+	return 0;
+}
+
+static int gk20a_ctrl_get_gpc_local_to_logical_map(struct gk20a *g, struct nvgpu_gr_config *gr_config,
+	u32 gr_instance_id, struct nvgpu_gpu_get_gpc_logical_map_args *args)
+{
+	u32 gpc_count;
+	u32 map_size;
+	u32 gpc_local_index;
+	u32 *logical_map;
+
+	gpc_count = nvgpu_gr_config_get_gpc_count(gr_config);
+	map_size = sizeof(u32) * gpc_count;
+
+	if (map_size != args->map_buf_size) {
+		return -EINVAL;
+	}
+
+	logical_map = (u32 *)nvgpu_kzalloc(g, map_size);
+	if (logical_map == NULL) {
+		return -ENOMEM;
+	}
+
+	for (gpc_local_index = 0U; gpc_local_index < gpc_count; ++gpc_local_index) {
+		logical_map[gpc_local_index] = nvgpu_grmgr_get_gr_gpc_logical_id(g, gr_instance_id, gpc_local_index);
+	}
+
+	if (copy_to_user((void __user *)(uintptr_t)args->logical_gpc_buf_addr, logical_map, map_size)) {
+		nvgpu_kfree(g, logical_map);
+		return -EFAULT;
+	}
+
+	nvgpu_kfree(g, logical_map);
+
+	return 0;
+}
+
 static int gk20a_ctrl_get_tpc_masks(struct gk20a *g, struct nvgpu_gr_config *gr_config,
 				    struct nvgpu_gpu_get_tpc_masks_args *args)
 {
@@ -2500,6 +2568,14 @@ long gk20a_ctrl_dev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg
 		err = gk20a_ctrl_get_tpc_masks(g, gr_config,
 			(struct nvgpu_gpu_get_tpc_masks_args *)buf);
 		break;
+	case NVGPU_GPU_IOCTL_GET_GPC_LOCAL_TO_PHYSICAL_MAP:
+		err = gk20a_ctrl_get_gpc_local_to_physical_map(g, gr_config,
+			gr_instance_id, (struct nvgpu_gpu_get_gpc_physical_map_args *)buf);
+		break;
+	case NVGPU_GPU_IOCTL_GET_GPC_LOCAL_TO_LOGICAL_MAP:
+		err = gk20a_ctrl_get_gpc_local_to_logical_map(g, gr_config,
+			gr_instance_id, (struct nvgpu_gpu_get_gpc_logical_map_args *)buf);
+		break;
 	case NVGPU_GPU_IOCTL_GET_FBP_L2_MASKS:
 		err = gk20a_ctrl_get_fbp_l2_masks(g, gpu_instance_id,
 			(struct nvgpu_gpu_get_fbp_l2_masks_args *)buf);

include/uapi/linux/nvgpu-ctrl.h

@@ -502,6 +502,32 @@ struct nvgpu_gpu_get_tpc_masks_args {
 	__u64 mask_buf_addr;
 };
 
+struct nvgpu_gpu_get_gpc_physical_map_args {
+	/* [in] GPC logical-map-buffer size. It must be
+	 * sizeof(__u32) * fls(gpc_mask)
+	 */
+	__u32 map_buf_size;
+	__u32 reserved;
+
+	/* [out] pointer to array of u32 entries.
+	 * For each entry, index=local gpc index and value=physical gpc index.
+	 */
+	__u64 physical_gpc_buf_addr;
+};
+
+struct nvgpu_gpu_get_gpc_logical_map_args {
+	/* [in] GPC logical-map-buffer size. It must be
+	 * sizeof(__u32) * fls(gpc_mask)
+	 */
+	__u32 map_buf_size;
+	__u32 reserved;
+
+	/* [out] pointer to array of u32 entries.
+	 * For each entry, index=local gpc index and value=logical gpc index.
+	 */
+	__u64 logical_gpc_buf_addr;
+};
+
 struct nvgpu_gpu_open_channel_args {
 	union {
 		__s32 channel_fd; /* deprecated: use out.channel_fd instead */
@@ -1245,8 +1271,12 @@ struct nvgpu_gpu_register_buffer_args {
 	_IOWR(NVGPU_GPU_IOCTL_MAGIC, 41, struct nvgpu_gpu_register_buffer_args)
 #define NVGPU_GPU_IOCTL_GET_BUFFER_INFO	\
 	_IOWR(NVGPU_GPU_IOCTL_MAGIC, 42, struct nvgpu_gpu_get_buffer_info_args)
+#define NVGPU_GPU_IOCTL_GET_GPC_LOCAL_TO_PHYSICAL_MAP\
+	_IOWR(NVGPU_GPU_IOCTL_MAGIC, 43, struct nvgpu_gpu_get_gpc_physical_map_args)
+#define NVGPU_GPU_IOCTL_GET_GPC_LOCAL_TO_LOGICAL_MAP\
+	_IOWR(NVGPU_GPU_IOCTL_MAGIC, 44, struct nvgpu_gpu_get_gpc_logical_map_args)
 #define NVGPU_GPU_IOCTL_LAST		\
-	_IOC_NR(NVGPU_GPU_IOCTL_GET_BUFFER_INFO)
+	_IOC_NR(NVGPU_GPU_IOCTL_GET_GPC_LOCAL_TO_LOGICAL_MAP)
 #define NVGPU_GPU_IOCTL_MAX_ARG_SIZE	\
 	sizeof(struct nvgpu_gpu_get_cpu_time_correlation_info_args)