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

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

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://patch.msgid.link/20260218205553.3561-7-michal.wajdeczko@intel.com
This commit is contained in:
Michal Wajdeczko
2026-02-18 21:55:48 +01:00
parent 81d417d56a
commit cbe29da6f7
1 changed files with 95 additions and 1 deletions
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96
drivers/gpu/drm/xe/tests/xe_gt_sriov_pf_config_kunit.c
View File

@@ -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),
{}
};