Commit cbe29da6 authored by Michal Wajdeczko's avatar Michal Wajdeczko
Browse files

drm/xe/tests: Add KUnit tests for new VRAM fair provisioning 



Add basic test cases to check outcome of the fair VRAM provisioning
for regular and admin-only PF mode.

Signed-off-by: default avatarMichal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: default avatarPiotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://patch.msgid.link/20260218205553.3561-7-michal.wajdeczko@intel.com
parent 81d417d5

drivers/gpu/drm/xe/tests/xe_gt_sriov_pf_config_kunit.c

+95 −1
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ 
#include "xe_pci_test.h"



#define TEST_MAX_VFS	63

#define TEST_VRAM	0x37a800000ull



static void pf_set_admin_mode(struct xe_device *xe, bool enable)

{
@@ -19,6 +20,17 @@ static void pf_set_admin_mode(struct xe_device *xe, bool enable) 
	KUNIT_EXPECT_EQ(kunit_get_current_test(), enable, xe_sriov_pf_admin_only(xe));

}



static void pf_set_usable_vram(struct xe_device *xe, u64 usable)

{

	struct xe_tile *tile = xe_device_get_root_tile(xe);

	struct kunit *test = kunit_get_current_test();



	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, tile);

	xe->mem.vram->usable_size = usable;

	tile->mem.vram->usable_size = usable;

	KUNIT_ASSERT_EQ(test, usable, xe_vram_region_usable_size(tile->mem.vram));

}



static const void *num_vfs_gen_param(struct kunit *test, const void *prev, char *desc)

{

	unsigned long next = 1 + (unsigned long)prev;
@@ -34,9 +46,11 @@ static int pf_gt_config_test_init(struct kunit *test) 
{

	struct xe_pci_fake_data fake = {

		.sriov_mode = XE_SRIOV_MODE_PF,

		.platform = XE_TIGERLAKE, /* any random platform with SR-IOV */

		.platform = XE_BATTLEMAGE, /* any random DGFX platform with SR-IOV */

		.subplatform = XE_SUBPLATFORM_NONE,

		.graphics_verx100 = 2001,

	};

	struct xe_vram_region *vram;

	struct xe_device *xe;

	struct xe_gt *gt;
@@ -50,6 +64,19 @@ static int pf_gt_config_test_init(struct kunit *test) 
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, gt);

	test->priv = gt;



	/* pretend it has some VRAM */

	KUNIT_ASSERT_TRUE(test, IS_DGFX(xe));

	vram = kunit_kzalloc(test, sizeof(*vram), GFP_KERNEL);

	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, vram);

	vram->usable_size = TEST_VRAM;

	xe->mem.vram = vram;

	xe->tiles[0].mem.vram = vram;



	/* pretend we have a valid LMTT */

	KUNIT_ASSERT_TRUE(test, xe_device_has_lmtt(xe));

	KUNIT_ASSERT_GE(test, GRAPHICS_VERx100(xe), 1260);

	xe->tiles[0].sriov.pf.lmtt.ops = &lmtt_ml_ops;



	/* pretend it can support up to 63 VFs */

	xe->sriov.pf.device_total_vfs = TEST_MAX_VFS;

	xe->sriov.pf.driver_max_vfs = TEST_MAX_VFS;
@@ -189,13 +216,80 @@ static void fair_ggtt(struct kunit *test) 
		KUNIT_ASSERT_EQ(test, SZ_2G, pf_profile_fair_ggtt(gt, num_vfs));

}



static const u64 vram_sizes[] = {

	SZ_4G - SZ_512M,

	SZ_8G + SZ_4G - SZ_512M,

	SZ_16G - SZ_512M,

	SZ_32G - SZ_512M,

	SZ_64G - SZ_512M,

	TEST_VRAM,

};



static void u64_param_get_desc(const u64 *p, char *desc)

{

	string_get_size(*p, 1, STRING_UNITS_2, desc, KUNIT_PARAM_DESC_SIZE);

}



KUNIT_ARRAY_PARAM(vram_size, vram_sizes, u64_param_get_desc);



static void fair_vram_1vf(struct kunit *test)

{

	const u64 usable = *(const u64 *)test->param_value;

	struct xe_gt *gt = test->priv;

	struct xe_device *xe = gt_to_xe(gt);



	pf_set_admin_mode(xe, false);

	pf_set_usable_vram(xe, usable);



	KUNIT_EXPECT_NE(test, 0, pf_profile_fair_lmem(gt, 1));

	KUNIT_EXPECT_GE(test, usable, pf_profile_fair_lmem(gt, 1));

	KUNIT_EXPECT_TRUE(test, is_power_of_2(pf_profile_fair_lmem(gt, 1)));

	KUNIT_EXPECT_GE(test, usable - pf_profile_fair_lmem(gt, 1), pf_profile_fair_lmem(gt, 1));

}



static void fair_vram_1vf_admin_only(struct kunit *test)

{

	const u64 usable = *(const u64 *)test->param_value;

	struct xe_gt *gt = test->priv;

	struct xe_device *xe = gt_to_xe(gt);



	pf_set_admin_mode(xe, true);

	pf_set_usable_vram(xe, usable);



	KUNIT_EXPECT_NE(test, 0, pf_profile_fair_lmem(gt, 1));

	KUNIT_EXPECT_GE(test, usable, pf_profile_fair_lmem(gt, 1));

	KUNIT_EXPECT_LT(test, usable - pf_profile_fair_lmem(gt, 1), pf_profile_fair_lmem(gt, 1));

	KUNIT_EXPECT_TRUE(test, IS_ALIGNED(pf_profile_fair_lmem(gt, 1), SZ_1G));

}



static void fair_vram(struct kunit *test)

{

	unsigned int num_vfs = (unsigned long)test->param_value;

	struct xe_gt *gt = test->priv;

	struct xe_device *xe = gt_to_xe(gt);

	u64 alignment = pf_get_lmem_alignment(gt);

	char size[10];



	pf_set_admin_mode(xe, false);



	string_get_size(pf_profile_fair_lmem(gt, num_vfs), 1, STRING_UNITS_2, size, sizeof(size));

	kunit_info(test, "fair %s %llx\n", size, pf_profile_fair_lmem(gt, num_vfs));



	KUNIT_EXPECT_TRUE(test, is_power_of_2(pf_profile_fair_lmem(gt, num_vfs)));

	KUNIT_EXPECT_TRUE(test, IS_ALIGNED(pf_profile_fair_lmem(gt, num_vfs), alignment));

	KUNIT_EXPECT_GE(test, TEST_VRAM, num_vfs * pf_profile_fair_lmem(gt, num_vfs));

}



static struct kunit_case pf_gt_config_test_cases[] = {

	KUNIT_CASE(fair_contexts_1vf),

	KUNIT_CASE(fair_doorbells_1vf),

	KUNIT_CASE(fair_ggtt_1vf),

	KUNIT_CASE_PARAM(fair_vram_1vf, vram_size_gen_params),

	KUNIT_CASE_PARAM(fair_vram_1vf_admin_only, vram_size_gen_params),

	KUNIT_CASE_PARAM(fair_contexts, num_vfs_gen_param),

	KUNIT_CASE_PARAM(fair_doorbells, num_vfs_gen_param),

	KUNIT_CASE_PARAM(fair_ggtt, num_vfs_gen_param),

	KUNIT_CASE_PARAM(fair_vram, num_vfs_gen_param),

	{}

};