[igt-dev] [PATCH i-g-t v2 04/10] lib/intel_allocator: Add allocator support for Xe

[Zbigniew Kempczyński]

Start supporting va range configuration for xe allocator.

During opening allocator has to be aware of vm range (start and end).
i915 driver doesn't expose vm range information so those variables
have to be detected. In xe driver we get information of va size from
the kernel query so va end can be directly configured. At the moment
there's no autodetection of va start for xe what might need to be
address in the future if due some reason lower offsets might not be
in use.

Signed-off-by: Zbigniew Kempczyński <zbigniew.kempczynski at intel.com>
Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem at intel.com>
---
 lib/intel_allocator.c | 49 ++++++++++++++++++++++++++-----------------
 1 file changed, 30 insertions(+), 19 deletions(-)

diff --git a/lib/intel_allocator.c b/lib/intel_allocator.c
index 2b08dd5996..f644e2f49d 100644
--- a/lib/intel_allocator.c
+++ b/lib/intel_allocator.c
@@ -16,6 +16,7 @@
 #include "igt_map.h"
 #include "intel_allocator.h"
 #include "intel_allocator_msgchannel.h"
+#include "xe/xe_query.h"
 
 //#define ALLOCDBG
 #ifdef ALLOCDBG
@@ -910,24 +911,33 @@ static uint64_t __intel_allocator_open_full(int fd, uint32_t ctx,
 	struct alloc_resp resp;
 	uint64_t gtt_size;
 
-	if (!start)
-		req.open.start = gem_detect_safe_start_offset(fd);
+	if (is_i915_device(fd)) {
+		if (!start)
+			req.open.start = gem_detect_safe_start_offset(fd);
 
-	if (!end) {
-		igt_assert_f(can_report_gtt_size(fd), "Invalid fd\n");
-		gtt_size = gem_aperture_size(fd);
-		if (!gem_uses_full_ppgtt(fd))
-			gtt_size /= 2;
-		else
-			gtt_size -= RESERVED;
+		if (!end) {
+			igt_assert_f(can_report_gtt_size(fd), "Invalid fd\n");
+			gtt_size = gem_aperture_size(fd);
+			if (!gem_uses_full_ppgtt(fd))
+				gtt_size /= 2;
+			else
+				gtt_size -= RESERVED;
 
-		req.open.end = gtt_size;
-	}
+			req.open.end = gtt_size;
+		}
+
+		if (!default_alignment)
+			req.open.default_alignment = gem_detect_safe_alignment(fd);
+
+		req.open.start = ALIGN(req.open.start, req.open.default_alignment);
+	} else {
+		struct xe_device *xe_dev = xe_device_get(fd);
 
-	if (!default_alignment)
-		req.open.default_alignment = gem_detect_safe_alignment(fd);
+		igt_assert(xe_dev);
 
-	req.open.start = ALIGN(req.open.start, req.open.default_alignment);
+		if (!end)
+			req.open.end = 1ull << xe_dev->va_bits;
+	}
 
 	/* Get child_tid only once at open() */
 	if (child_tid == -1)
@@ -991,6 +1001,7 @@ uint64_t intel_allocator_open_vm_full(int fd, uint32_t vm,
 				      uint64_t default_alignment)
 {
 	igt_assert(vm != 0);
+
 	return __intel_allocator_open_full(fd, 0, vm, start, end,
 					   allocator_type, strategy,
 					   default_alignment);
@@ -998,7 +1009,7 @@ uint64_t intel_allocator_open_vm_full(int fd, uint32_t vm,
 
 /**
  * intel_allocator_open:
- * @fd: i915 descriptor
+ * @fd: i915 or xe descriptor
  * @ctx: context
  * @allocator_type: one of INTEL_ALLOCATOR_* define
  *
@@ -1014,14 +1025,14 @@ uint64_t intel_allocator_open_vm_full(int fd, uint32_t vm,
  */
 uint64_t intel_allocator_open(int fd, uint32_t ctx, uint8_t allocator_type)
 {
-	return intel_allocator_open_full(fd, ctx, 0, 0, allocator_type,
-					 ALLOC_STRATEGY_HIGH_TO_LOW, 0);
+	return __intel_allocator_open_full(fd, ctx, 0, 0, 0, allocator_type,
+					   ALLOC_STRATEGY_HIGH_TO_LOW, 0);
 }
 
 uint64_t intel_allocator_open_vm(int fd, uint32_t vm, uint8_t allocator_type)
 {
-	return intel_allocator_open_vm_full(fd, vm, 0, 0, allocator_type,
-					    ALLOC_STRATEGY_HIGH_TO_LOW, 0);
+	return __intel_allocator_open_full(fd, 0, vm, 0, 0, allocator_type,
+					   ALLOC_STRATEGY_HIGH_TO_LOW, 0);
 }
 
 uint64_t intel_allocator_open_vm_as(uint64_t allocator_handle, uint32_t new_vm)
-- 
2.34.1