On 02/08/2016 07:20, Yang, Rong R wrote:
I sent a new version, could you check this and give comments/ACK?
Thanks,
Yang Rong
-----Original Message-----
From: Beignet [mailto:beignet-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of
Yang Rong
Sent: Tuesday, August 2, 2016 15:51
To: beignet@xxxxxxxxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: Yang, Rong R <rong.r.yang@xxxxxxxxx>
Subject: [Beignet] [Patch V3] intel: Export pooled EU and min no. of eus in a
pool.
Update kernel interface with new I915_GETPARAM ioctl entries for pooled
EU and min no. of eus in a pool. Add a wrapping function for each parameter.
Userspace drivers need these values when decide the thread count. This
kernel enabled pooled eu by default for BXT and for fused down 2x6 parts it
is advised to turn it off.
But there is another HW issue in these parts (fused down 2x6 parts) before
C0 that requires Pooled EU to be enabled as a workaround. In this case the
pool configuration changes depending upon which subslice is disabled and
the no. of eus in a pool is different, So userspace need to know min no. of
eus in a pool.
V2: use return value as the query results.
ret < 0 when error, ret = 0 when not support, and ret > 0 indicate
query results.(Chris)
V3: Correct V2 errors.
Signed-off-by: Yang Rong <rong.r.yang@xxxxxxxxx>
---
include/drm/i915_drm.h | 2 ++
intel/intel_bufmgr.h | 3 +++
intel/intel_bufmgr_gem.c | 30 ++++++++++++++++++++++++++++++
3 files changed, 35 insertions(+)
diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h index
c4ce6b2..eb611a7 100644
--- a/include/drm/i915_drm.h
+++ b/include/drm/i915_drm.h
@@ -357,6 +357,8 @@ typedef struct drm_i915_irq_wait {
#define I915_PARAM_HAS_GPU_RESET 35
#define I915_PARAM_HAS_RESOURCE_STREAMER 36
#define I915_PARAM_HAS_EXEC_SOFTPIN 37
+#define I915_PARAM_HAS_POOLED_EU 38
+#define I915_PARAM_MIN_EU_IN_POOL 39
typedef struct drm_i915_getparam {
__s32 param;
diff --git a/intel/intel_bufmgr.h b/intel/intel_bufmgr.h index
a1abbcd..96a4d9d 100644
--- a/intel/intel_bufmgr.h
+++ b/intel/intel_bufmgr.h
@@ -273,6 +273,9 @@ int drm_intel_get_reset_stats(drm_intel_context
*ctx, int drm_intel_get_subslice_total(int fd, unsigned int *subslice_total);
int drm_intel_get_eu_total(int fd, unsigned int *eu_total);
+int drm_intel_get_pooled_eu(int fd);
+int drm_intel_get_min_eu_in_pool(int fd);
+
/** @{ Compatibility defines to keep old code building despite the symbol
rename
* from dri_* to drm_intel_*
*/
diff --git a/intel/intel_bufmgr_gem.c b/intel/intel_bufmgr_gem.c index
0a4012b..b0a0eb9 100644
--- a/intel/intel_bufmgr_gem.c
+++ b/intel/intel_bufmgr_gem.c
@@ -3237,6 +3237,36 @@ drm_intel_get_eu_total(int fd, unsigned int
*eu_total)
return 0;
}
+int
+drm_intel_get_pooled_eu(int fd)
+{
+ drm_i915_getparam_t gp;
+ int ret;
with 'ret' initialized to -1 in both functions, this patch is now merged
to libdrm.
Thanks Chris for the review and pushing it.
regards
Arun
+
+ memclear(gp);
+ gp.param = I915_PARAM_HAS_POOLED_EU;
+ gp.value = &ret;
+ if (drmIoctl(fd, DRM_IOCTL_I915_GETPARAM, &gp))
+ return -errno;
+
+ return ret;
+}
+
+int
+drm_intel_get_min_eu_in_pool(int fd)
+{
+ drm_i915_getparam_t gp;
+ int ret;
+
+ memclear(gp);
+ gp.param = I915_PARAM_MIN_EU_IN_POOL;
+ gp.value = &ret;
+ if (drmIoctl(fd, DRM_IOCTL_I915_GETPARAM, &gp))
+ return -errno;
+
+ return ret;
+}
+
/**
* Annotate the given bo for use in aub dumping.
*
--
2.1.4
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