[PATCH] intel: Export GT config attributes

[jeff.mcgee at intel.com]

From: Jeff McGee <jeff.mcgee at intel.com>

Update kernel interface with new I915_GETPARAM ioctl entries for
slice total, subslice total, EU total, and threads per EU. Add a
wrapping function for each parameter.

The motivation for this change is that fusing can be used to create
multiple slice, subslice, and EU configuration within the same PCI
ID. CHV is the first such device to do this and thus make an ID-based
lookup table approach unreliable. The best solution is for the kernel
to determine the precise config from fuse registers and share the
required information with userspace. Moving to this approach has the
added benefit of reducing the number of static parameters that
userspace must maintain for current and future devices.

For: VIZ-4636
Signed-off-by: Jeff McGee <jeff.mcgee at intel.com>
---
 include/drm/i915_drm.h   |  4 +++
 intel/intel_bufmgr.h     |  5 ++++
 intel/intel_bufmgr_gem.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 72 insertions(+)

diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h
index 15dd01d..be38adf 100644
--- a/include/drm/i915_drm.h
+++ b/include/drm/i915_drm.h
@@ -340,6 +340,10 @@ 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_SLICE_TOTAL		 30
+#define I915_PARAM_SUBSLICE_TOTAL	 31
+#define I915_PARAM_EU_TOTAL		 32
+#define I915_PARAM_THREADS_PER_EU	 33
 
 typedef struct drm_i915_getparam {
 	int param;
diff --git a/intel/intel_bufmgr.h b/intel/intel_bufmgr.h
index be83a56..90e535d 100644
--- a/intel/intel_bufmgr.h
+++ b/intel/intel_bufmgr.h
@@ -264,6 +264,11 @@ int drm_intel_get_reset_stats(drm_intel_context *ctx,
 			      uint32_t *active,
 			      uint32_t *pending);
 
+int drm_intel_get_slice_total(int fd, unsigned int *slice_total);
+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_threads_per_eu(int fd, unsigned int *threads_per_eu);
+
 /** @{ 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 14e92c9..e0b13e7 100644
--- a/intel/intel_bufmgr_gem.c
+++ b/intel/intel_bufmgr_gem.c
@@ -3293,6 +3293,69 @@ drm_intel_reg_read(drm_intel_bufmgr *bufmgr,
 	return ret;
 }
 
+drm_public int
+drm_intel_get_slice_total(int fd, unsigned int *slice_total)
+{
+	drm_i915_getparam_t gp;
+	int ret;
+
+	VG_CLEAR(gp);
+	gp.value = (int*)slice_total;
+	gp.param = I915_PARAM_SLICE_TOTAL;
+	ret = drmIoctl(fd, DRM_IOCTL_I915_GETPARAM, &gp);
+	if (ret)
+		return -errno;
+
+	return 0;
+}
+
+drm_public int
+drm_intel_get_subslice_total(int fd, unsigned int *subslice_total)
+{
+	drm_i915_getparam_t gp;
+	int ret;
+
+	VG_CLEAR(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;
+
+	VG_CLEAR(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;
+}
+
+drm_public int
+drm_intel_get_threads_per_eu(int fd, unsigned int *threads_per_eu)
+{
+	drm_i915_getparam_t gp;
+	int ret;
+
+	VG_CLEAR(gp);
+	gp.value = (int*)threads_per_eu;
+	gp.param = I915_PARAM_THREADS_PER_EU;
+	ret = drmIoctl(fd, DRM_IOCTL_I915_GETPARAM, &gp);
+	if (ret)
+		return -errno;
+
+	return 0;
+}
 
 /**
  * Annotate the given bo for use in aub dumping.
-- 
2.2.0