drm/panfrost: Export all GPU feature registers

Midgard/Bifrost GPUs have a bunch of feature registers providing details
of what the hardware supports. Panfrost already reads these, this patch
exports them all to user space so that the jobs created by the user space
driver can be tuned for the particular hardware implementation.
Signed-off-by: Steven Price <steven.price@arm.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190724105626.53552-1-steven.price@arm.com

drivers/gpu/drm/panfrost/panfrost_device.h

@@ -43,6 +43,7 @@ struct panfrost_features {
 	u32 js_features[16];
 
 	u32 nr_core_groups;
+	u32 thread_tls_alloc;
 
 	unsigned long hw_features[64 / BITS_PER_LONG];
 	unsigned long hw_issues[64 / BITS_PER_LONG];

drivers/gpu/drm/panfrost/panfrost_drv.c

@@ -32,10 +32,42 @@ static int panfrost_ioctl_get_param(struct drm_device *ddev, void *data, struct
 	if (param->pad != 0)
 		return -EINVAL;
 
+#define PANFROST_FEATURE(name, member)			\
+	case DRM_PANFROST_PARAM_ ## name:		\
+		param->value = pfdev->features.member;	\
+		break
+#define PANFROST_FEATURE_ARRAY(name, member, max)			\
+	case DRM_PANFROST_PARAM_ ## name ## 0 ...			\
+		DRM_PANFROST_PARAM_ ## name ## max:			\
+		param->value = pfdev->features.member[param->param -	\
+			DRM_PANFROST_PARAM_ ## name ## 0];		\
+		break
+
 	switch (param->param) {
-	case DRM_PANFROST_PARAM_GPU_PROD_ID:
-		param->value = pfdev->features.id;
-		break;
+		PANFROST_FEATURE(GPU_PROD_ID, id);
+		PANFROST_FEATURE(GPU_REVISION, revision);
+		PANFROST_FEATURE(SHADER_PRESENT, shader_present);
+		PANFROST_FEATURE(TILER_PRESENT, tiler_present);
+		PANFROST_FEATURE(L2_PRESENT, l2_present);
+		PANFROST_FEATURE(STACK_PRESENT, stack_present);
+		PANFROST_FEATURE(AS_PRESENT, as_present);
+		PANFROST_FEATURE(JS_PRESENT, js_present);
+		PANFROST_FEATURE(L2_FEATURES, l2_features);
+		PANFROST_FEATURE(CORE_FEATURES, core_features);
+		PANFROST_FEATURE(TILER_FEATURES, tiler_features);
+		PANFROST_FEATURE(MEM_FEATURES, mem_features);
+		PANFROST_FEATURE(MMU_FEATURES, mmu_features);
+		PANFROST_FEATURE(THREAD_FEATURES, thread_features);
+		PANFROST_FEATURE(MAX_THREADS, max_threads);
+		PANFROST_FEATURE(THREAD_MAX_WORKGROUP_SZ,
+				thread_max_workgroup_sz);
+		PANFROST_FEATURE(THREAD_MAX_BARRIER_SZ,
+				thread_max_barrier_sz);
+		PANFROST_FEATURE(COHERENCY_FEATURES, coherency_features);
+		PANFROST_FEATURE_ARRAY(TEXTURE_FEATURES, texture_features, 3);
+		PANFROST_FEATURE_ARRAY(JS_FEATURES, js_features, 15);
+		PANFROST_FEATURE(NR_CORE_GROUPS, nr_core_groups);
+		PANFROST_FEATURE(THREAD_TLS_ALLOC, thread_tls_alloc);
 	default:
 		return -EINVAL;
 	}

drivers/gpu/drm/panfrost/panfrost_gpu.c

@@ -232,6 +232,8 @@ static void panfrost_gpu_init_features(struct panfrost_device *pfdev)
 	pfdev->features.stack_present = gpu_read(pfdev, GPU_STACK_PRESENT_LO);
 	pfdev->features.stack_present |= (u64)gpu_read(pfdev, GPU_STACK_PRESENT_HI) << 32;
 
+	pfdev->features.thread_tls_alloc = gpu_read(pfdev, GPU_THREAD_TLS_ALLOC);
+
 	gpu_id = gpu_read(pfdev, GPU_ID);
 	pfdev->features.revision = gpu_id & 0xffff;
 	pfdev->features.id = gpu_id >> 16;

include/uapi/drm/panfrost_drm.h

@@ -127,6 +127,45 @@ struct drm_panfrost_mmap_bo {
 
 enum drm_panfrost_param {
 	DRM_PANFROST_PARAM_GPU_PROD_ID,
+	DRM_PANFROST_PARAM_GPU_REVISION,
+	DRM_PANFROST_PARAM_SHADER_PRESENT,
+	DRM_PANFROST_PARAM_TILER_PRESENT,
+	DRM_PANFROST_PARAM_L2_PRESENT,
+	DRM_PANFROST_PARAM_STACK_PRESENT,
+	DRM_PANFROST_PARAM_AS_PRESENT,
+	DRM_PANFROST_PARAM_JS_PRESENT,
+	DRM_PANFROST_PARAM_L2_FEATURES,
+	DRM_PANFROST_PARAM_CORE_FEATURES,
+	DRM_PANFROST_PARAM_TILER_FEATURES,
+	DRM_PANFROST_PARAM_MEM_FEATURES,
+	DRM_PANFROST_PARAM_MMU_FEATURES,
+	DRM_PANFROST_PARAM_THREAD_FEATURES,
+	DRM_PANFROST_PARAM_MAX_THREADS,
+	DRM_PANFROST_PARAM_THREAD_MAX_WORKGROUP_SZ,
+	DRM_PANFROST_PARAM_THREAD_MAX_BARRIER_SZ,
+	DRM_PANFROST_PARAM_COHERENCY_FEATURES,
+	DRM_PANFROST_PARAM_TEXTURE_FEATURES0,
+	DRM_PANFROST_PARAM_TEXTURE_FEATURES1,
+	DRM_PANFROST_PARAM_TEXTURE_FEATURES2,
+	DRM_PANFROST_PARAM_TEXTURE_FEATURES3,
+	DRM_PANFROST_PARAM_JS_FEATURES0,
+	DRM_PANFROST_PARAM_JS_FEATURES1,
+	DRM_PANFROST_PARAM_JS_FEATURES2,
+	DRM_PANFROST_PARAM_JS_FEATURES3,
+	DRM_PANFROST_PARAM_JS_FEATURES4,
+	DRM_PANFROST_PARAM_JS_FEATURES5,
+	DRM_PANFROST_PARAM_JS_FEATURES6,
+	DRM_PANFROST_PARAM_JS_FEATURES7,
+	DRM_PANFROST_PARAM_JS_FEATURES8,
+	DRM_PANFROST_PARAM_JS_FEATURES9,
+	DRM_PANFROST_PARAM_JS_FEATURES10,
+	DRM_PANFROST_PARAM_JS_FEATURES11,
+	DRM_PANFROST_PARAM_JS_FEATURES12,
+	DRM_PANFROST_PARAM_JS_FEATURES13,
+	DRM_PANFROST_PARAM_JS_FEATURES14,
+	DRM_PANFROST_PARAM_JS_FEATURES15,
+	DRM_PANFROST_PARAM_NR_CORE_GROUPS,
+	DRM_PANFROST_PARAM_THREAD_TLS_ALLOC,
 };
 
 struct drm_panfrost_get_param {