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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
This commit is contained in:
Steven Price 2019-07-24 11:56:26 +01:00 committed by Rob Herring
parent a1b27e9922
commit 4bced8bea0
4 changed files with 77 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/gpu/drm/panfrost/panfrost_device.h
View File

@ -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];

38
drivers/gpu/drm/panfrost/panfrost_drv.c
View File

@ -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;
}

2
drivers/gpu/drm/panfrost/panfrost_gpu.c
View File

@ -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;

39
include/uapi/drm/panfrost_drm.h
View File

@ -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 {