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intel: query for LLC support 

This adds support for querying the kernel about the LLC support in the
hardware.

In case the ioctl fails, we assume that it is present on GEN6 and GEN7.

v2: fix the return code checking

Signed-off-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
main
Eugeni Dodonov 2012-01-17 15:20:19 -02:00 committed by Eugeni Dodonov
parent 82c6938d23
commit 151cdcfe68
2 changed files with 13 additions and 0 deletions
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1
include/drm/i915_drm.h
View File

@ -287,6 +287,7 @@ typedef struct drm_i915_irq_wait {
#define I915_PARAM_HAS_EXEC_CONSTANTS 14
#define I915_PARAM_HAS_RELAXED_DELTA 15
#define I915_PARAM_HAS_GEN7_SOL_RESET 16
#define I915_PARAM_HAS_LLC 17
typedef struct drm_i915_getparam {
int param;

12
intel/intel_bufmgr_gem.c
View File

@ -107,6 +107,7 @@ typedef struct _drm_intel_bufmgr_gem {
unsigned int has_bsd : 1;
unsigned int has_blt : 1;
unsigned int has_relaxed_fencing : 1;
unsigned int has_llc : 1;
unsigned int bo_reuse : 1;
bool fenced_relocs;
} drm_intel_bufmgr_gem;
@ -2358,6 +2359,17 @@ drm_intel_bufmgr_gem_init(int fd, int batch_size)
ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GETPARAM, &gp);
bufmgr_gem->has_relaxed_fencing = ret == 0;
gp.param = I915_PARAM_HAS_LLC;
ret = drmIoctl(bufmgr_gem->fd, DRM_IOCTL_I915_GETPARAM, &gp);
if (ret == -EINVAL) {
/* Kernel does not supports HAS_LLC query, fallback to GPU
* generation detection and assume that we have LLC on GEN6/7
*/
bufmgr_gem->has_llc = (IS_GEN6(bufmgr_gem->pci_device) |
IS_GEN7(bufmgr_gem->pci_device));
} else
bufmgr_gem->has_llc = ret == 0;
if (bufmgr_gem->gen < 4) {
gp.param = I915_PARAM_NUM_FENCES_AVAIL;
gp.value = &bufmgr_gem->available_fences;