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intel: Export total subslice and EU counts 

Update kernel interface with new I915_GETPARAM ioctl entries for
subslice total and EU total. Add a wrapping function for each
parameter. Userspace drivers need these values when constructing
GPGPU commands. This kernel query method is intended to replace
the PCI ID-based tables that userspace drivers currently maintain.
The kernel driver can employ fuse register reads as needed to
ensure the most accurate determination of GT config attributes.
This first became important with Cherryview in which the config
could differ between devices with the same PCI ID.

The kernel detection of these values is device-specific. Userspace
drivers should continue to maintain ID-based tables for older
devices which return ENODEV when using this query.

v2: remove unnecessary include of <stdbool.h> and increment the
    I915_GETPARAM indices to match updated kernel patch.

For: VIZ-4636
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Jeff McGee <jeff.mcgee@intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
main
Jeff McGee 2015-03-09 16:13:03 -07:00 committed by Damien Lespiau
parent d20413a7ce
commit d556e068a7
3 changed files with 36 additions and 0 deletions
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2
include/drm/i915_drm.h
View File

@ -340,6 +340,8 @@ typedef struct drm_i915_irq_wait {
#define I915_PARAM_HAS_EXEC_HANDLE_LUT 26
#define I915_PARAM_HAS_WT 27
#define I915_PARAM_CMD_PARSER_VERSION 28
#define I915_PARAM_SUBSLICE_TOTAL 33
#define I915_PARAM_EU_TOTAL 34
typedef struct drm_i915_getparam {
int param;

3
intel/intel_bufmgr.h
View File

@ -264,6 +264,9 @@ int drm_intel_get_reset_stats(drm_intel_context *ctx,
uint32_t *active,
uint32_t *pending);
int drm_intel_get_subslice_total(int fd, unsigned int *subslice_total);
int drm_intel_get_eu_total(int fd, unsigned int *eu_total);
/** @{ Compatibility defines to keep old code building despite the symbol rename
* from dri_* to drm_intel_*
*/

31
intel/intel_bufmgr_gem.c
View File

@ -3295,6 +3295,37 @@ drm_intel_reg_read(drm_intel_bufmgr *bufmgr,
return ret;
}
drm_public int
drm_intel_get_subslice_total(int fd, unsigned int *subslice_total)
{
drm_i915_getparam_t gp;
int ret;
memclear(gp);
gp.value = (int*)subslice_total;
gp.param = I915_PARAM_SUBSLICE_TOTAL;
ret = drmIoctl(fd, DRM_IOCTL_I915_GETPARAM, &gp);
if (ret)
return -errno;
return 0;
}
drm_public int
drm_intel_get_eu_total(int fd, unsigned int *eu_total)
{
drm_i915_getparam_t gp;
int ret;
memclear(gp);
gp.value = (int*)eu_total;
gp.param = I915_PARAM_EU_TOTAL;
ret = drmIoctl(fd, DRM_IOCTL_I915_GETPARAM, &gp);
if (ret)
return -errno;
return 0;
}
/**
* Annotate the given bo for use in aub dumping.