This will let userspace know whether Resource Streamer is supported
in the kernel.
v2: Update I915_PARAM_HAS_RESOURCE_STREAMER so it's after
I915_PARAM_HAS_GPU_RESET.
v3: Only advertise RS support for hardware that supports it.
v4: Add HAS_RESOURCE_STREAMER() macro (Chris)
Suggested-by: Kenneth Graunke <kenn...@whitecape.org>
Cc: Kenneth Graunke <kenn...@whitecape.org>
Cc: Chris Wilson <ch...@chris-wilson.co.uk>
Signed-off-by: Abdiel Janulgue <abdiel.janul...@linux.intel.com>
---
drivers/gpu/drm/i915/i915_dma.c | 3 +++
drivers/gpu/drm/i915/i915_drv.h | 3 +++
include/uapi/drm/i915_drm.h | 1 +
3 files changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index c5349fa..a42f165 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -167,6 +167,9 @@ static int i915_getparam(struct drm_device *dev, void *data,
value = i915.enable_hangcheck &&
intel_has_gpu_reset(dev);
break;
+ case I915_PARAM_HAS_RESOURCE_STREAMER:
+ value = HAS_RESOURCE_STREAMER(dev);
+ break;
default:
DRM_DEBUG("Unknown parameter %d\n", param->param);
return -EINVAL;
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index ea9caf2..9968663 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2520,6 +2520,9 @@ struct drm_i915_cmd_table {
#define HAS_CSR(dev) (IS_SKYLAKE(dev))
+#define HAS_RESOURCE_STREAMER(dev) (IS_HASWELL(dev) || \
+ INTEL_INFO(dev)->gen >= 8)
+
#define INTEL_PCH_DEVICE_ID_MASK 0xff00
#define INTEL_PCH_IBX_DEVICE_ID_TYPE 0x3b00
#define INTEL_PCH_CPT_DEVICE_ID_TYPE 0x1c00
diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
index f88cc1c..51137bd 100644
--- a/include/uapi/drm/i915_drm.h
+++ b/include/uapi/drm/i915_drm.h
@@ -355,6 +355,7 @@ typedef struct drm_i915_irq_wait {
#define I915_PARAM_SUBSLICE_TOTAL 33
#define I915_PARAM_EU_TOTAL 34
#define I915_PARAM_HAS_GPU_RESET 35
+#define I915_PARAM_HAS_RESOURCE_STREAMER 36
typedef struct drm_i915_getparam {
int param;
--
1.9.1
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