/*
* 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
*/
#include <linux/seq_file.h>
#include "drmP.h"
#include "radeon_drm.h"
#include "radeon_reg.h"
#include "radeon.h"
#include "atom.h"
int radeon_debugfs_ib_init(struct radeon_device *rdev);
/*
* IB.
*/
int radeon_ib_get(struct radeon_device *rdev, struct radeon_ib **ib)
{
struct radeon_fence *fence;
struct radeon_ib *nib;
unsigned long i;
int r = 0;
*ib = NULL;
r = radeon_fence_create(rdev, &fence);
if (r) {
DRM_ERROR("failed to create fence for new IB\n");
return r;
}
mutex_lock(&rdev->ib_pool.mutex);
i = find_first_zero_bit(rdev->ib_pool.alloc_bm, RADEON_IB_POOL_SIZE);
if (i < RADEON_IB_POOL_SIZE) {
set_bit(i, rdev->ib_pool.alloc_bm);
rdev->ib_pool.ibs[i].length_dw = 0;
*ib = &rdev->ib_pool.ibs[i];
mutex_unlock(&rdev->ib_pool.mutex);
goto out;
}
if (list_empty(&rdev->ib_pool.scheduled_ibs)) {
/* we go do nothings here */
mutex_unlock(&rdev->ib_pool.mutex);
DRM_ERROR("all IB allocated none scheduled.\n");
r = -EINVAL;
goto out;
}
/* get the first ib on the scheduled list */
nib = list_entry(rdev->ib_pool.scheduled_ibs.next,
struct radeon_ib, list);
if (nib->fence == NULL) {
/* we go do nothings here */
mutex_unlock(&rdev->ib_pool.mutex);
DRM_ERROR("IB %lu scheduled without a fence.\n", nib->idx);
r = -EINVAL;
goto out;
}
mutex_unlock(&rdev->ib_pool.mutex);
r = radeon_fence_wait(nib->fence, false);
if (r) {
DRM_ERROR("radeon: IB(%lu:0x%016lX:%u)\n", nib->idx,
(unsigned long)nib->gpu_addr, nib->length_dw);
DRM_ERROR("radeon: GPU lockup detected, fail to get a IB\n");
goto out;
}
radeon_fence_unref(&nib->fence);
nib->length_dw = 0;
/* scheduled list is accessed here */
mutex_lock(&rdev->ib_pool.mutex);
list_del(&nib->list);
INIT_LIST_HEAD(&nib->list);
mutex_unlock(&rdev->ib_pool.mutex);
*ib = nib;
out:
if (r) {
radeon_fence_unref(&fence);
} else {
(*ib)->fence = fence;
}
return r;
}
void radeon_ib_free(struct radeon_device *rdev, struct radeon_ib **ib)
{
struct radeon_ib *tmp = *ib;
*ib = NULL;
if (tmp == NULL) {
return;
}
mutex_lock(&rdev->ib_pool.mutex);
if (!list_empty(&tmp->list) && !radeon_fence_signaled(tmp->fence)) {
/* IB is scheduled & not signaled don't do anythings */
mutex_unlock(&rdev->ib_pool.mutex);
return;
}
list_del(&tmp->list);
INIT_LIST_HEAD(&tmp->list);
if (tmp->fence)
radeon_fence_unref(&tmp->fence);
tmp->length_dw = 0;
clear_bit(tmp->idx, rdev->ib_pool.alloc_bm);
mutex_unlock(&rdev->ib_pool.mutex);
}
int radeon_ib_schedule(struct radeon_device *rdev, struct radeon_ib *ib)
{
int r = 0;
if (!ib->length_dw || !rdev->cp.ready) {
/* TODO: Nothings in the ib we should report. */
DRM_ERROR("radeon: couldn't schedule IB(%lu).\n", ib->idx);
return -EINVAL;
}
/* 64 dwords should be enough for fence too */
r = radeon_ring_lock(rdev, 64);
if (r) {
DRM_ERROR("radeon: scheduling IB failled (%d).\n", r);
return r;
}
radeon_ring_ib_execute(rdev, ib);
radeon_fence_emit(rdev, ib->fence);
mutex_lock(&rdev->ib_pool.mutex);
list_add_tail(&ib->list, &rdev->ib_pool.scheduled_ibs);
mutex_unlock(&rdev->ib_pool.mutex);
radeon_ring_unlock_commit(rdev);
return 0;
}
int radeon_ib_pool_init(struct radeon_device *rdev)
{
void *ptr;
uint64_t gpu_addr;
int i;
int r = 0;
if (rdev->ib_pool.robj)
return 0;
/* Allocate 1M object buffer */
INIT_LIST_HEAD(&rdev->ib_pool.scheduled_ibs);
r = radeon_bo_create(rdev, NULL, RADEON_IB_POOL_SIZE*64*1024,
true, RADEON_GEM_DOMAIN_GTT,
&rdev->ib_pool.robj);
if (r) {
DRM_ERROR("radeon: failed to ib pool (%d).\n", r);
return r;
}
r = radeon_bo_reserve(rdev->ib_pool.robj, false);
if (unlikely(r != 0))
return r;
r = radeon_bo_pin(rdev->ib_pool.robj, RADEON_GEM_DOMAIN_GTT, &gpu_addr);
if (r) {
radeon_bo_unreserve(rdev->ib_pool.robj);
DRM_ERROR("radeon: failed to pin ib pool (%d).\n", r);
return r;
}
r = radeon_bo_kmap(rdev->ib_pool.robj, &ptr);
radeon_bo_unreserve(rdev->ib_pool.robj);
if (r) {
DRM_ERROR("radeon: failed to map ib poll (%d).\n", r);
return r;
}
for (i = 0; i < RADEON_IB_POOL_SIZE; i++) {
unsigned offset;
offset = i * 64 * 1024;
rdev->ib_pool.ibs[i].gpu_addr = gpu_addr + offset;
rdev->ib_pool.ibs[i].ptr = ptr + offset;
rdev->ib_pool.ibs[i].idx = i;
rdev->ib_pool.ibs[i].length_dw = 0;
INIT_LIST_HEAD(&rdev->ib_pool.ibs[i].list);
}
bitmap_zero(rdev->ib_pool.alloc_bm, RADEON_IB_POOL_SIZE);
rdev->ib_pool.ready = true;
DRM_INFO("radeon: ib pool ready.\n");
if (radeon_debugfs_ib_init(rdev)) {
DRM_ERROR("Failed to register debugfs file for IB !\n");
}
return r;
}
void radeon_ib_pool_fini(struct radeon_device *rdev)
{
int r;
if (!rdev->ib_pool.ready) {
return;
}
mutex_lock(&rdev->ib_pool.mutex);
bitmap_zero(rdev->ib_pool.alloc_bm, RADEON_IB_POOL_SIZE);
if (rdev->ib_pool.robj) {
r = radeon_bo_reserve(rdev->ib_pool.robj, false);
if (likely(r == 0)) {
radeon_bo_kunmap(rdev->ib_pool.robj);
radeon_bo_unpin(rdev->ib_pool.robj);
radeon_bo_unreserve(rdev->ib_pool.robj);
}
radeon_bo_unref(&rdev->ib_pool.robj);
rdev->ib_pool.robj = NULL;
}
mutex_unlock(&rdev->ib_pool.mutex);
}
/*
* Ring.
*/
void radeon_ring_free_size(struct radeon_device *rdev)
{
if (rdev->family >= CHIP_R600)
rdev->cp.rptr = RREG32(R600_CP_RB_RPTR);
else
rdev->cp.rptr = RREG32(RADEON_CP_RB_RPTR);
/* This works because ring_size is a power of 2 */
rdev->cp.ring_free_dw = (rdev->cp.rptr + (rdev->cp.ring_size / 4));
rdev->cp.ring_free_dw -= rdev->cp.wptr;
rdev->cp.ring_free_dw &= rdev->cp.ptr_mask;
if (!rdev->cp.ring_free_dw) {
rdev->cp.ring_free_dw = rdev->cp.ring_size / 4;
}
}
int radeon_ring_lock(struct radeon_device *rdev, unsigned ndw)
{
int r;
/* Align requested size with padding so unlock_commit can
* pad safely */
ndw = (ndw + rdev->cp.align_mask) & ~rdev->cp.align_mask;
mutex_lock(&rdev->cp.mutex);
while (ndw > (rdev->cp.ring_free_dw - 1)) {
radeon_ring_free_size(rdev);
if (ndw < rdev->cp.ring_free_dw) {
break;
}
r = radeon_fence_wait_next(rdev);
if (r) {
mutex_unlock(&rdev->cp.mutex);
return r;
}
}
rdev->cp.count_dw = ndw;
rdev->cp.wptr_old = rdev->cp.wptr;
return 0;
}
void radeon_ring_unlock_commit(struct radeon_device *rdev)
{
unsigned count_dw_pad;
unsigned i;
/* We pad to match fetch size */
count_dw_pad = (rdev->cp.align_mask + 1) -
(rdev->cp.wptr & rdev->cp.align_mask);
for (i = 0; i < count_dw_pad; i++) {
radeon_ring_write(rdev, 2 << 30);
}
DRM_MEMORYBARRIER();
radeon_cp_commit(rdev);
mutex_unlock(&rdev->cp.mutex);
}
void radeon_ring_unlock_undo(struct radeon_device *rdev)
{
rdev->cp.wptr = rdev->cp.wptr_old;
mutex_unlock(&rdev->cp.mutex);
}
int radeon_ring_init(struct radeon_device *rdev, unsigned ring_size)
{
int r;
rdev->cp.ring_size = ring_size;
/* Allocate ring buffer */
if (rdev->cp.ring_obj == NULL) {
r = radeon_bo_create(rdev, NULL, rdev->cp.ring_size, true,
RADEON_GEM_DOMAIN_GTT,
&rdev->cp.ring_obj);
if (r) {
dev_err(rdev->dev, "(%d) ring create failed\n", r);
return r;
}
r = radeon_bo_reserve(rdev->cp.ring_obj, false);
if (unlikely(r != 0))
return r;
r = radeon_bo_pin(rdev->cp.ring_obj, RADEON_GEM_DOMAIN_GTT,
&rdev->cp.gpu_addr);
if (r) {
radeon_bo_unreserve(rdev->cp.ring_obj);
dev_err(rdev->dev, "(%d) ring pin failed\n", r);
return r;
}
r = radeon_bo_kmap(rdev->cp.ring_obj,
(void **)&rdev->cp.ring);
radeon_bo_unreserve(rdev->cp.ring_obj);
if (r) {
dev_err(rdev->dev, "(%d) ring map failed\n", r);
return r;
}
}
rdev->cp.ptr_mask = (rdev->cp.ring_size / 4) - 1;
rdev->cp.ring_free_dw = rdev->cp.ring_size / 4;
return 0;
}
void radeon_ring_fini(struct radeon_device *rdev)
{
int r;
mutex_lock(&rdev->cp.mutex);
if (rdev->cp.ring_obj) {
r = radeon_bo_reserve(rdev->cp.ring_obj, false);
if (likely(r == 0)) {
radeon_bo_kunmap(rdev->cp.ring_obj);
radeon_bo_unpin(rdev->cp.ring_obj);
radeon_bo_unreserve(rdev->cp.ring_obj);
}
radeon_bo_unref(&rdev->cp.ring_obj);
rdev->cp.ring = NULL;
rdev->cp.ring_obj = NULL;
}
mutex_unlock(&rdev->cp.mutex);
}
/*
* Debugfs info
*/
#if defined(CONFIG_DEBUG_FS)
static int radeon_debugfs_ib_info(struct seq_file *m, void *data)
{
struct drm_info_node *node = (struct drm_info_node *) m->private;
struct radeon_ib *ib = node->info_ent->data;
unsigned i;
if (ib == NULL) {
return 0;
}
seq_printf(m, "IB %04lu\n", ib->idx);
seq_printf(m, "IB fence %p\n", ib->fence);
seq_printf(m, "IB size %05u dwords\n", ib->length_dw);
for (i = 0; i < ib->length_dw; i++) {
seq_printf(m, "[%05u]=0x%08X\n", i, ib->ptr[i]);
}
return 0;
}
static struct drm_info_list radeon_debugfs_ib_list[RADEON_IB_POOL_SIZE];
static char radeon_debugfs_ib_names[RADEON_IB_POOL_SIZE][32];
#endif
int radeon_debugfs_ib_init(struct radeon_device *rdev)
{
#if defined(CONFIG_DEBUG_FS)
unsigned i;
for (i = 0; i < RADEON_IB_POOL_SIZE; i++) {
sprintf(radeon_debugfs_ib_names[i], "radeon_ib_%04u", i);
radeon_debugfs_ib_list[i].name = radeon_debugfs_ib_names[i];
radeon_debugfs_ib_list[i].show = &radeon_debugfs_ib_info;
radeon_debugfs_ib_list[i].driver_features = 0;
radeon_debugfs_ib_list[i].data = &rdev->ib_pool.ibs[i];
}
return radeon_debugfs_add_files(rdev, radeon_debugfs_ib_list,
RADEON_IB_POOL_SIZE);
#else
return 0;
#endif
}
