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linux/drivers/gpu/drm/xe/tests/xe_rtp_test.c
Lucas De Marchi 85f3b79fb5 drm/xe: Group normal kunit tests in a single module 
Creating one module for each compilation unit to be tested seems
excessive as the number of tests increase. Group them all in a single
kunit test module called xe_test.ko.

The tests requiring the physical device, aka "live" tests, are still
kept in separate modules since they are normally triggered via igt,
and not via kunit.py. After igt is converted, those can be merged in
a single module as well.

Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Acked-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231122203147.988021-2-lucas.demarchi@intel.com
2024-01-16 09:53:27 -08:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright © 2023 Intel Corporation
*/
#include <linux/string.h>
#include <linux/xarray.h>
#include <drm/drm_drv.h>
#include <drm/drm_kunit_helpers.h>
#include <kunit/test.h>
#include "regs/xe_gt_regs.h"
#include "regs/xe_reg_defs.h"
#include "xe_device.h"
#include "xe_device_types.h"
#include "xe_kunit_helpers.h"
#include "xe_pci_test.h"
#include "xe_reg_sr.h"
#include "xe_rtp.h"
#define REGULAR_REG1 XE_REG(1)
#define REGULAR_REG2 XE_REG(2)
#define REGULAR_REG3 XE_REG(3)
#define MCR_REG1 XE_REG_MCR(1)
#define MCR_REG2 XE_REG_MCR(2)
#define MCR_REG3 XE_REG_MCR(3)
#define MASKED_REG1 XE_REG(1, XE_REG_OPTION_MASKED)
#undef XE_REG_MCR
#define XE_REG_MCR(...) XE_REG(__VA_ARGS__, .mcr = 1)
struct rtp_test_case {
const char *name;
struct xe_reg expected_reg;
u32 expected_set_bits;
u32 expected_clr_bits;
unsigned long expected_count;
unsigned int expected_sr_errors;
const struct xe_rtp_entry_sr *entries;
};
static bool match_yes(const struct xe_gt *gt, const struct xe_hw_engine *hwe)
{
return true;
}
static bool match_no(const struct xe_gt *gt, const struct xe_hw_engine *hwe)
{
return false;
}
static const struct rtp_test_case cases[] = {
{
.name = "coalesce-same-reg",
.expected_reg = REGULAR_REG1,
.expected_set_bits = REG_BIT(0) | REG_BIT(1),
.expected_clr_bits = REG_BIT(0) | REG_BIT(1),
.expected_count = 1,
/* Different bits on the same register: create a single entry */
.entries = (const struct xe_rtp_entry_sr[]) {
{ XE_RTP_NAME("basic-1"),
XE_RTP_RULES(FUNC(match_yes)),
XE_RTP_ACTIONS(SET(REGULAR_REG1, REG_BIT(0)))
},
{ XE_RTP_NAME("basic-2"),
XE_RTP_RULES(FUNC(match_yes)),
XE_RTP_ACTIONS(SET(REGULAR_REG1, REG_BIT(1)))
},
{}
},
},
{
.name = "no-match-no-add",
.expected_reg = REGULAR_REG1,
.expected_set_bits = REG_BIT(0),
.expected_clr_bits = REG_BIT(0),
.expected_count = 1,
/* Don't coalesce second entry since rules don't match */
.entries = (const struct xe_rtp_entry_sr[]) {
{ XE_RTP_NAME("basic-1"),
XE_RTP_RULES(FUNC(match_yes)),
XE_RTP_ACTIONS(SET(REGULAR_REG1, REG_BIT(0)))
},
{ XE_RTP_NAME("basic-2"),
XE_RTP_RULES(FUNC(match_no)),
XE_RTP_ACTIONS(SET(REGULAR_REG1, REG_BIT(1)))
},
{}
},
},
{
.name = "no-match-no-add-multiple-rules",
.expected_reg = REGULAR_REG1,
.expected_set_bits = REG_BIT(0),
.expected_clr_bits = REG_BIT(0),
.expected_count = 1,
/* Don't coalesce second entry due to one of the rules */
.entries = (const struct xe_rtp_entry_sr[]) {
{ XE_RTP_NAME("basic-1"),
XE_RTP_RULES(FUNC(match_yes)),
XE_RTP_ACTIONS(SET(REGULAR_REG1, REG_BIT(0)))
},
{ XE_RTP_NAME("basic-2"),
XE_RTP_RULES(FUNC(match_yes), FUNC(match_no)),
XE_RTP_ACTIONS(SET(REGULAR_REG1, REG_BIT(1)))
},
{}
},
},
{
.name = "two-regs-two-entries",
.expected_reg = REGULAR_REG1,
.expected_set_bits = REG_BIT(0),
.expected_clr_bits = REG_BIT(0),
.expected_count = 2,
/* Same bits on different registers are not coalesced */
.entries = (const struct xe_rtp_entry_sr[]) {
{ XE_RTP_NAME("basic-1"),
XE_RTP_RULES(FUNC(match_yes)),
XE_RTP_ACTIONS(SET(REGULAR_REG1, REG_BIT(0)))
},
{ XE_RTP_NAME("basic-2"),
XE_RTP_RULES(FUNC(match_yes)),
XE_RTP_ACTIONS(SET(REGULAR_REG2, REG_BIT(0)))
},
{}
},
},
{
.name = "clr-one-set-other",
.expected_reg = REGULAR_REG1,
.expected_set_bits = REG_BIT(0),
.expected_clr_bits = REG_BIT(1) | REG_BIT(0),
.expected_count = 1,
/* Check clr vs set actions on different bits */
.entries = (const struct xe_rtp_entry_sr[]) {
{ XE_RTP_NAME("basic-1"),
XE_RTP_RULES(FUNC(match_yes)),
XE_RTP_ACTIONS(SET(REGULAR_REG1, REG_BIT(0)))
},
{ XE_RTP_NAME("basic-2"),
XE_RTP_RULES(FUNC(match_yes)),
XE_RTP_ACTIONS(CLR(REGULAR_REG1, REG_BIT(1)))
},
{}
},
},
{
#define TEMP_MASK REG_GENMASK(10, 8)
#define TEMP_FIELD REG_FIELD_PREP(TEMP_MASK, 2)
.name = "set-field",
.expected_reg = REGULAR_REG1,
.expected_set_bits = TEMP_FIELD,
.expected_clr_bits = TEMP_MASK,
.expected_count = 1,
/* Check FIELD_SET works */
.entries = (const struct xe_rtp_entry_sr[]) {
{ XE_RTP_NAME("basic-1"),
XE_RTP_RULES(FUNC(match_yes)),
XE_RTP_ACTIONS(FIELD_SET(REGULAR_REG1,
TEMP_MASK, TEMP_FIELD))
},
{}
},
#undef TEMP_MASK
#undef TEMP_FIELD
},
{
.name = "conflict-duplicate",
.expected_reg = REGULAR_REG1,
.expected_set_bits = REG_BIT(0),
.expected_clr_bits = REG_BIT(0),
.expected_count = 1,
.expected_sr_errors = 1,
.entries = (const struct xe_rtp_entry_sr[]) {
{ XE_RTP_NAME("basic-1"),
XE_RTP_RULES(FUNC(match_yes)),
XE_RTP_ACTIONS(SET(REGULAR_REG1, REG_BIT(0)))
},
/* drop: setting same values twice */
{ XE_RTP_NAME("basic-2"),
XE_RTP_RULES(FUNC(match_yes)),
XE_RTP_ACTIONS(SET(REGULAR_REG1, REG_BIT(0)))
},
{}
},
},
{
.name = "conflict-not-disjoint",
.expected_reg = REGULAR_REG1,
.expected_set_bits = REG_BIT(0),
.expected_clr_bits = REG_BIT(0),
.expected_count = 1,
.expected_sr_errors = 1,
.entries = (const struct xe_rtp_entry_sr[]) {
{ XE_RTP_NAME("basic-1"),
XE_RTP_RULES(FUNC(match_yes)),
XE_RTP_ACTIONS(SET(REGULAR_REG1, REG_BIT(0)))
},
/* drop: bits are not disjoint with previous entries */
{ XE_RTP_NAME("basic-2"),
XE_RTP_RULES(FUNC(match_yes)),
XE_RTP_ACTIONS(CLR(REGULAR_REG1, REG_GENMASK(1, 0)))
},
{}
},
},
{
.name = "conflict-reg-type",
.expected_reg = REGULAR_REG1,
.expected_set_bits = REG_BIT(0),
.expected_clr_bits = REG_BIT(0),
.expected_count = 1,
.expected_sr_errors = 2,
.entries = (const struct xe_rtp_entry_sr[]) {
{ XE_RTP_NAME("basic-1"),
XE_RTP_RULES(FUNC(match_yes)),
XE_RTP_ACTIONS(SET(REGULAR_REG1, REG_BIT(0)))
},
/* drop: regular vs MCR */
{ XE_RTP_NAME("basic-2"),
XE_RTP_RULES(FUNC(match_yes)),
XE_RTP_ACTIONS(SET(MCR_REG1, REG_BIT(1)))
},
/* drop: regular vs masked */
{ XE_RTP_NAME("basic-3"),
XE_RTP_RULES(FUNC(match_yes)),
XE_RTP_ACTIONS(SET(MASKED_REG1, REG_BIT(0)))
},
{}
},
},
};
static void xe_rtp_process_tests(struct kunit *test)
{
const struct rtp_test_case *param = test->param_value;
struct xe_device *xe = test->priv;
struct xe_gt *gt = xe_device_get_root_tile(xe)->primary_gt;
struct xe_reg_sr *reg_sr = &gt->reg_sr;
const struct xe_reg_sr_entry *sre, *sr_entry = NULL;
struct xe_rtp_process_ctx ctx = XE_RTP_PROCESS_CTX_INITIALIZER(gt);
unsigned long idx, count = 0;
xe_reg_sr_init(reg_sr, "xe_rtp_tests", xe);
xe_rtp_process_to_sr(&ctx, param->entries, reg_sr);
xa_for_each(&reg_sr->xa, idx, sre) {
if (idx == param->expected_reg.addr)
sr_entry = sre;
count++;
}
KUNIT_EXPECT_EQ(test, count, param->expected_count);
KUNIT_EXPECT_EQ(test, sr_entry->clr_bits, param->expected_clr_bits);
KUNIT_EXPECT_EQ(test, sr_entry->set_bits, param->expected_set_bits);
KUNIT_EXPECT_EQ(test, sr_entry->reg.raw, param->expected_reg.raw);
KUNIT_EXPECT_EQ(test, reg_sr->errors, param->expected_sr_errors);
}
static void rtp_desc(const struct rtp_test_case *t, char *desc)
{
strscpy(desc, t->name, KUNIT_PARAM_DESC_SIZE);
}
KUNIT_ARRAY_PARAM(rtp, cases, rtp_desc);
static int xe_rtp_test_init(struct kunit *test)
{
struct xe_device *xe;
struct device *dev;
int ret;
dev = drm_kunit_helper_alloc_device(test);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, dev);
xe = xe_kunit_helper_alloc_xe_device(test, dev);
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, xe);
/* Initialize an empty device */
test->priv = NULL;
ret = xe_pci_fake_device_init(xe);
KUNIT_ASSERT_EQ(test, ret, 0);
xe->drm.dev = dev;
test->priv = xe;
return 0;
}
static void xe_rtp_test_exit(struct kunit *test)
{
struct xe_device *xe = test->priv;
drm_kunit_helper_free_device(test, xe->drm.dev);
}
static struct kunit_case xe_rtp_tests[] = {
KUNIT_CASE_PARAM(xe_rtp_process_tests, rtp_gen_params),
{}
};
static struct kunit_suite xe_rtp_test_suite = {
.name = "xe_rtp",
.init = xe_rtp_test_init,
.exit = xe_rtp_test_exit,
.test_cases = xe_rtp_tests,
};
kunit_test_suite(xe_rtp_test_suite);
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