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/*
* SPDX-License-Identifier: MIT
*
* Copyright © 2018 Intel Corporation
*/
#include "gt/intel_gt.h"
#include "gem/selftests/igt_gem_utils.h"
#include "igt_spinner.h"
int igt_spinner_init(struct igt_spinner *spin, struct intel_gt *gt)
{
unsigned int mode;
void *vaddr;
int err;
memset(spin, 0, sizeof(*spin));
spin->gt = gt;
spin->hws = i915_gem_object_create_internal(gt->i915, PAGE_SIZE);
if (IS_ERR(spin->hws)) {
err = PTR_ERR(spin->hws);
goto err;
}
spin->obj = i915_gem_object_create_internal(gt->i915, PAGE_SIZE);
if (IS_ERR(spin->obj)) {
err = PTR_ERR(spin->obj);
goto err_hws;
}
i915_gem_object_set_cache_coherency(spin->hws, I915_CACHE_LLC);
vaddr = i915_gem_object_pin_map(spin->hws, I915_MAP_WB);
if (IS_ERR(vaddr)) {
err = PTR_ERR(vaddr);
goto err_obj;
}
spin->seqno = memset(vaddr, 0xff, PAGE_SIZE);
mode = i915_coherent_map_type(gt->i915);
vaddr = i915_gem_object_pin_map(spin->obj, mode);
if (IS_ERR(vaddr)) {
err = PTR_ERR(vaddr);
goto err_unpin_hws;
}
spin->batch = vaddr;
return 0;
err_unpin_hws:
i915_gem_object_unpin_map(spin->hws);
err_obj:
i915_gem_object_put(spin->obj);
err_hws:
i915_gem_object_put(spin->hws);
err:
return err;
}
static unsigned int seqno_offset(u64 fence)
{
return offset_in_page(sizeof(u32) * fence);
}
static u64 hws_address(const struct i915_vma *hws,
const struct i915_request *rq)
{
return hws->node.start + seqno_offset(rq->fence.context);
}
static int move_to_active(struct i915_vma *vma,
struct i915_request *rq,
unsigned int flags)
{
int err;
i915_vma_lock(vma);
err = i915_request_await_object(rq, vma->obj,
flags & EXEC_OBJECT_WRITE);
if (err == 0)
err = i915_vma_move_to_active(vma, rq, flags);
i915_vma_unlock(vma);
return err;
}
struct i915_request *
igt_spinner_create_request(struct igt_spinner *spin,
struct intel_context *ce,
u32 arbitration_command)
{
struct intel_engine_cs *engine = ce->engine;
struct i915_request *rq = NULL;
struct i915_vma *hws, *vma;
unsigned int flags;
u32 *batch;
int err;
GEM_BUG_ON(spin->gt != ce->vm->gt);
if (!intel_engine_can_store_dword(ce->engine))
return ERR_PTR(-ENODEV);
vma = i915_vma_instance(spin->obj, ce->vm, NULL);
if (IS_ERR(vma))
return ERR_CAST(vma);
hws = i915_vma_instance(spin->hws, ce->vm, NULL);
if (IS_ERR(hws))
return ERR_CAST(hws);
err = i915_vma_pin(vma, 0, 0, PIN_USER);
if (err)
return ERR_PTR(err);
err = i915_vma_pin(hws, 0, 0, PIN_USER);
if (err)
goto unpin_vma;
rq = intel_context_create_request(ce);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
goto unpin_hws;
}
err = move_to_active(vma, rq, 0);
if (err)
goto cancel_rq;
err = move_to_active(hws, rq, 0);
if (err)
goto cancel_rq;
batch = spin->batch;
if (INTEL_GEN(rq->i915) >= 8) {
*batch++ = MI_STORE_DWORD_IMM_GEN4;
*batch++ = lower_32_bits(hws_address(hws, rq));
*batch++ = upper_32_bits(hws_address(hws, rq));
} else if (INTEL_GEN(rq->i915) >= 6) {
*batch++ = MI_STORE_DWORD_IMM_GEN4;
*batch++ = 0;
*batch++ = hws_address(hws, rq);
} else if (INTEL_GEN(rq->i915) >= 4) {
*batch++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT;
*batch++ = 0;
*batch++ = hws_address(hws, rq);
} else {
*batch++ = MI_STORE_DWORD_IMM | MI_MEM_VIRTUAL;
*batch++ = hws_address(hws, rq);
}
*batch++ = rq->fence.seqno;
*batch++ = arbitration_command;
if (INTEL_GEN(rq->i915) >= 8)
*batch++ = MI_BATCH_BUFFER_START | BIT(8) | 1;
else if (IS_HASWELL(rq->i915))
*batch++ = MI_BATCH_BUFFER_START | MI_BATCH_PPGTT_HSW;
else if (INTEL_GEN(rq->i915) >= 6)
*batch++ = MI_BATCH_BUFFER_START;
else
*batch++ = MI_BATCH_BUFFER_START | MI_BATCH_GTT;
*batch++ = lower_32_bits(vma->node.start);
*batch++ = upper_32_bits(vma->node.start);
*batch++ = MI_BATCH_BUFFER_END; /* not reached */
intel_gt_chipset_flush(engine->gt);
if (engine->emit_init_breadcrumb) {
err = engine->emit_init_breadcrumb(rq);
if (err)
goto cancel_rq;
}
flags = 0;
if (INTEL_GEN(rq->i915) <= 5)
flags |= I915_DISPATCH_SECURE;
err = engine->emit_bb_start(rq, vma->node.start, PAGE_SIZE, flags);
cancel_rq:
if (err) {
i915_request_set_error_once(rq, err);
i915_request_add(rq);
}
unpin_hws:
i915_vma_unpin(hws);
unpin_vma:
i915_vma_unpin(vma);
return err ? ERR_PTR(err) : rq;
}
static u32
hws_seqno(const struct igt_spinner *spin, const struct i915_request *rq)
{
u32 *seqno = spin->seqno + seqno_offset(rq->fence.context);
return READ_ONCE(*seqno);
}
void igt_spinner_end(struct igt_spinner *spin)
{
*spin->batch = MI_BATCH_BUFFER_END;
intel_gt_chipset_flush(spin->gt);
}
void igt_spinner_fini(struct igt_spinner *spin)
{
igt_spinner_end(spin);
i915_gem_object_unpin_map(spin->obj);
i915_gem_object_put(spin->obj);
i915_gem_object_unpin_map(spin->hws);
i915_gem_object_put(spin->hws);
}
bool igt_wait_for_spinner(struct igt_spinner *spin, struct i915_request *rq)
{
return !(wait_for_us(i915_seqno_passed(hws_seqno(spin, rq),
rq->fence.seqno),
10) &&
wait_for(i915_seqno_passed(hws_seqno(spin, rq),
rq->fence.seqno),
1000));
}
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