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/*
* Copyright 2008 Advanced Micro Devices, Inc.
* Copyright 2008 Red Hat Inc.
* Copyright 2009 Jerome Glisse.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Dave Airlie
* Alex Deucher
* Jerome Glisse
* Christian K├Ânig
*/
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <drm/amdgpu_drm.h>
#include <drm/drm_debugfs.h>
#include "amdgpu.h"
#include "atom.h"
#include "amdgpu_trace.h"
#define AMDGPU_IB_TEST_TIMEOUT msecs_to_jiffies(1000)
#define AMDGPU_IB_TEST_GFX_XGMI_TIMEOUT msecs_to_jiffies(2000)
/*
* IB
* IBs (Indirect Buffers) and areas of GPU accessible memory where
* commands are stored. You can put a pointer to the IB in the
* command ring and the hw will fetch the commands from the IB
* and execute them. Generally userspace acceleration drivers
* produce command buffers which are send to the kernel and
* put in IBs for execution by the requested ring.
*/
static int amdgpu_debugfs_sa_init(struct amdgpu_device *adev);
/**
* amdgpu_ib_get - request an IB (Indirect Buffer)
*
* @ring: ring index the IB is associated with
* @size: requested IB size
* @ib: IB object returned
*
* Request an IB (all asics). IBs are allocated using the
* suballocator.
* Returns 0 on success, error on failure.
*/
int amdgpu_ib_get(struct amdgpu_device *adev, struct amdgpu_vm *vm,
unsigned size, struct amdgpu_ib *ib)
{
int r;
if (size) {
r = amdgpu_sa_bo_new(&adev->ring_tmp_bo,
&ib->sa_bo, size, 256);
if (r) {
dev_err(adev->dev, "failed to get a new IB (%d)\n", r);
return r;
}
ib->ptr = amdgpu_sa_bo_cpu_addr(ib->sa_bo);
if (!vm)
ib->gpu_addr = amdgpu_sa_bo_gpu_addr(ib->sa_bo);
}
return 0;
}
/**
* amdgpu_ib_free - free an IB (Indirect Buffer)
*
* @adev: amdgpu_device pointer
* @ib: IB object to free
* @f: the fence SA bo need wait on for the ib alloation
*
* Free an IB (all asics).
*/
void amdgpu_ib_free(struct amdgpu_device *adev, struct amdgpu_ib *ib,
struct dma_fence *f)
{
amdgpu_sa_bo_free(adev, &ib->sa_bo, f);
}
/**
* amdgpu_ib_schedule - schedule an IB (Indirect Buffer) on the ring
*
* @adev: amdgpu_device pointer
* @num_ibs: number of IBs to schedule
* @ibs: IB objects to schedule
* @f: fence created during this submission
*
* Schedule an IB on the associated ring (all asics).
* Returns 0 on success, error on failure.
*
* On SI, there are two parallel engines fed from the primary ring,
* the CE (Constant Engine) and the DE (Drawing Engine). Since
* resource descriptors have moved to memory, the CE allows you to
* prime the caches while the DE is updating register state so that
* the resource descriptors will be already in cache when the draw is
* processed. To accomplish this, the userspace driver submits two
* IBs, one for the CE and one for the DE. If there is a CE IB (called
* a CONST_IB), it will be put on the ring prior to the DE IB. Prior
* to SI there was just a DE IB.
*/
int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs,
struct amdgpu_ib *ibs, struct amdgpu_job *job,
struct dma_fence **f)
{
struct amdgpu_device *adev = ring->adev;
struct amdgpu_ib *ib = &ibs[0];
struct dma_fence *tmp = NULL;
bool skip_preamble, need_ctx_switch;
unsigned patch_offset = ~0;
struct amdgpu_vm *vm;
uint64_t fence_ctx;
uint32_t status = 0, alloc_size;
unsigned fence_flags = 0;
unsigned i;
int r = 0;
bool need_pipe_sync = false;
if (num_ibs == 0)
return -EINVAL;
/* ring tests don't use a job */
if (job) {
vm = job->vm;
fence_ctx = job->base.s_fence ?
job->base.s_fence->scheduled.context : 0;
} else {
vm = NULL;
fence_ctx = 0;
}
if (!ring->sched.ready) {
dev_err(adev->dev, "couldn't schedule ib on ring <%s>\n", ring->name);
return -EINVAL;
}
if (vm && !job->vmid) {
dev_err(adev->dev, "VM IB without ID\n");
return -EINVAL;
}
alloc_size = ring->funcs->emit_frame_size + num_ibs *
ring->funcs->emit_ib_size;
r = amdgpu_ring_alloc(ring, alloc_size);
if (r) {
dev_err(adev->dev, "scheduling IB failed (%d).\n", r);
return r;
}
need_ctx_switch = ring->current_ctx != fence_ctx;
if (ring->funcs->emit_pipeline_sync && job &&
((tmp = amdgpu_sync_get_fence(&job->sched_sync, NULL)) ||
(amdgpu_sriov_vf(adev) && need_ctx_switch) ||
amdgpu_vm_need_pipeline_sync(ring, job))) {
need_pipe_sync = true;
if (tmp)
trace_amdgpu_ib_pipe_sync(job, tmp);
dma_fence_put(tmp);
}
if (ring->funcs->insert_start)
ring->funcs->insert_start(ring);
if (job) {
r = amdgpu_vm_flush(ring, job, need_pipe_sync);
if (r) {
amdgpu_ring_undo(ring);
return r;
}
}
if (job && ring->funcs->init_cond_exec)
patch_offset = amdgpu_ring_init_cond_exec(ring);
#ifdef CONFIG_X86_64
if (!(adev->flags & AMD_IS_APU))
#endif
{
if (ring->funcs->emit_hdp_flush)
amdgpu_ring_emit_hdp_flush(ring);
else
amdgpu_asic_flush_hdp(adev, ring);
}
if (need_ctx_switch)
status |= AMDGPU_HAVE_CTX_SWITCH;
skip_preamble = ring->current_ctx == fence_ctx;
if (job && ring->funcs->emit_cntxcntl) {
status |= job->preamble_status;
status |= job->preemption_status;
amdgpu_ring_emit_cntxcntl(ring, status);
}
for (i = 0; i < num_ibs; ++i) {
ib = &ibs[i];
/* drop preamble IBs if we don't have a context switch */
if ((ib->flags & AMDGPU_IB_FLAG_PREAMBLE) &&
skip_preamble &&
!(status & AMDGPU_PREAMBLE_IB_PRESENT_FIRST) &&
!amdgpu_mcbp &&
!amdgpu_sriov_vf(adev)) /* for SRIOV preemption, Preamble CE ib must be inserted anyway */
continue;
amdgpu_ring_emit_ib(ring, job, ib, status);
status &= ~AMDGPU_HAVE_CTX_SWITCH;
}
if (ring->funcs->emit_tmz)
amdgpu_ring_emit_tmz(ring, false);
#ifdef CONFIG_X86_64
if (!(adev->flags & AMD_IS_APU))
#endif
amdgpu_asic_invalidate_hdp(adev, ring);
if (ib->flags & AMDGPU_IB_FLAG_TC_WB_NOT_INVALIDATE)
fence_flags |= AMDGPU_FENCE_FLAG_TC_WB_ONLY;
/* wrap the last IB with fence */
if (job && job->uf_addr) {
amdgpu_ring_emit_fence(ring, job->uf_addr, job->uf_sequence,
fence_flags | AMDGPU_FENCE_FLAG_64BIT);
}
r = amdgpu_fence_emit(ring, f, fence_flags);
if (r) {
dev_err(adev->dev, "failed to emit fence (%d)\n", r);
if (job && job->vmid)
amdgpu_vmid_reset(adev, ring->funcs->vmhub, job->vmid);
amdgpu_ring_undo(ring);
return r;
}
if (ring->funcs->insert_end)
ring->funcs->insert_end(ring);
if (patch_offset != ~0 && ring->funcs->patch_cond_exec)
amdgpu_ring_patch_cond_exec(ring, patch_offset);
ring->current_ctx = fence_ctx;
if (vm && ring->funcs->emit_switch_buffer)
amdgpu_ring_emit_switch_buffer(ring);
amdgpu_ring_commit(ring);
return 0;
}
/**
* amdgpu_ib_pool_init - Init the IB (Indirect Buffer) pool
*
* @adev: amdgpu_device pointer
*
* Initialize the suballocator to manage a pool of memory
* for use as IBs (all asics).
* Returns 0 on success, error on failure.
*/
int amdgpu_ib_pool_init(struct amdgpu_device *adev)
{
int r;
if (adev->ib_pool_ready) {
return 0;
}
r = amdgpu_sa_bo_manager_init(adev, &adev->ring_tmp_bo,
AMDGPU_IB_POOL_SIZE*64*1024,
AMDGPU_GPU_PAGE_SIZE,
AMDGPU_GEM_DOMAIN_GTT);
if (r) {
return r;
}
adev->ib_pool_ready = true;
if (amdgpu_debugfs_sa_init(adev)) {
dev_err(adev->dev, "failed to register debugfs file for SA\n");
}
return 0;
}
/**
* amdgpu_ib_pool_fini - Free the IB (Indirect Buffer) pool
*
* @adev: amdgpu_device pointer
*
* Tear down the suballocator managing the pool of memory
* for use as IBs (all asics).
*/
void amdgpu_ib_pool_fini(struct amdgpu_device *adev)
{
if (adev->ib_pool_ready) {
amdgpu_sa_bo_manager_fini(adev, &adev->ring_tmp_bo);
adev->ib_pool_ready = false;
}
}
/**
* amdgpu_ib_ring_tests - test IBs on the rings
*
* @adev: amdgpu_device pointer
*
* Test an IB (Indirect Buffer) on each ring.
* If the test fails, disable the ring.
* Returns 0 on success, error if the primary GFX ring
* IB test fails.
*/
int amdgpu_ib_ring_tests(struct amdgpu_device *adev)
{
unsigned i;
int r, ret = 0;
long tmo_gfx, tmo_mm;
tmo_mm = tmo_gfx = AMDGPU_IB_TEST_TIMEOUT;
if (amdgpu_sriov_vf(adev)) {
/* for MM engines in hypervisor side they are not scheduled together
* with CP and SDMA engines, so even in exclusive mode MM engine could
* still running on other VF thus the IB TEST TIMEOUT for MM engines
* under SR-IOV should be set to a long time. 8 sec should be enough
* for the MM comes back to this VF.
*/
tmo_mm = 8 * AMDGPU_IB_TEST_TIMEOUT;
}
if (amdgpu_sriov_runtime(adev)) {
/* for CP & SDMA engines since they are scheduled together so
* need to make the timeout width enough to cover the time
* cost waiting for it coming back under RUNTIME only
*/
tmo_gfx = 8 * AMDGPU_IB_TEST_TIMEOUT;
} else if (adev->gmc.xgmi.hive_id) {
tmo_gfx = AMDGPU_IB_TEST_GFX_XGMI_TIMEOUT;
}
for (i = 0; i < adev->num_rings; ++i) {
struct amdgpu_ring *ring = adev->rings[i];
long tmo;
/* KIQ rings don't have an IB test because we never submit IBs
* to them and they have no interrupt support.
*/
if (!ring->sched.ready || !ring->funcs->test_ib)
continue;
/* MM engine need more time */
if (ring->funcs->type == AMDGPU_RING_TYPE_UVD ||
ring->funcs->type == AMDGPU_RING_TYPE_VCE ||
ring->funcs->type == AMDGPU_RING_TYPE_UVD_ENC ||
ring->funcs->type == AMDGPU_RING_TYPE_VCN_DEC ||
ring->funcs->type == AMDGPU_RING_TYPE_VCN_ENC ||
ring->funcs->type == AMDGPU_RING_TYPE_VCN_JPEG)
tmo = tmo_mm;
else
tmo = tmo_gfx;
r = amdgpu_ring_test_ib(ring, tmo);
if (!r) {
DRM_DEV_DEBUG(adev->dev, "ib test on %s succeeded\n",
ring->name);
continue;
}
ring->sched.ready = false;
DRM_DEV_ERROR(adev->dev, "IB test failed on %s (%d).\n",
ring->name, r);
if (ring == &adev->gfx.gfx_ring[0]) {
/* oh, oh, that's really bad */
adev->accel_working = false;
return r;
} else {
ret = r;
}
}
return ret;
}
/*
* Debugfs info
*/
#if defined(CONFIG_DEBUG_FS)
static int amdgpu_debugfs_sa_info(struct seq_file *m, void *data)
{
struct drm_info_node *node = (struct drm_info_node *) m->private;
struct drm_device *dev = node->minor->dev;
struct amdgpu_device *adev = dev->dev_private;
amdgpu_sa_bo_dump_debug_info(&adev->ring_tmp_bo, m);
return 0;
}
static const struct drm_info_list amdgpu_debugfs_sa_list[] = {
{"amdgpu_sa_info", &amdgpu_debugfs_sa_info, 0, NULL},
};
#endif
static int amdgpu_debugfs_sa_init(struct amdgpu_device *adev)
{
#if defined(CONFIG_DEBUG_FS)
return amdgpu_debugfs_add_files(adev, amdgpu_debugfs_sa_list, 1);
#else
return 0;
#endif
}