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drm/radeon: allocate semaphore from the ib pool

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This allow to share the ib pool with semaphore and avoid
having more bo around.

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Jerome Glisse 2011-12-21 12:13:47 -05:00 committed by Dave Airlie
parent 69e130a6a4
commit c1341e5280
4 changed files with 136 additions and 105 deletions
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67
drivers/gpu/drm/radeon/radeon.h
View File

@ -242,32 +242,6 @@ struct radeon_fence *radeon_fence_ref(struct radeon_fence *fence);
void radeon_fence_unref(struct radeon_fence **fence);
int radeon_fence_count_emitted(struct radeon_device *rdev, int ring);
/*
* Semaphores.
*/
struct radeon_ring;
struct radeon_semaphore_driver {
rwlock_t lock;
struct list_head free;
};
struct radeon_semaphore {
struct radeon_bo *robj;
struct list_head list;
uint64_t gpu_addr;
};
void radeon_semaphore_driver_fini(struct radeon_device *rdev);
int radeon_semaphore_create(struct radeon_device *rdev,
struct radeon_semaphore **semaphore);
void radeon_semaphore_emit_signal(struct radeon_device *rdev, int ring,
struct radeon_semaphore *semaphore);
void radeon_semaphore_emit_wait(struct radeon_device *rdev, int ring,
struct radeon_semaphore *semaphore);
void radeon_semaphore_free(struct radeon_device *rdev,
struct radeon_semaphore *semaphore);
/*
* Tiling registers
*/
@ -386,6 +360,46 @@ int radeon_mode_dumb_destroy(struct drm_file *file_priv,
struct drm_device *dev,
uint32_t handle);
/*
* Semaphores.
*/
struct radeon_ring;
#define RADEON_SEMAPHORE_BO_SIZE 256
struct radeon_semaphore_driver {
rwlock_t lock;
struct list_head bo;
};
struct radeon_semaphore_bo;
/* everything here is constant */
struct radeon_semaphore {
struct list_head list;
uint64_t gpu_addr;
uint32_t *cpu_ptr;
struct radeon_semaphore_bo *bo;
};
struct radeon_semaphore_bo {
struct list_head list;
struct radeon_ib *ib;
struct list_head free;
struct radeon_semaphore semaphores[RADEON_SEMAPHORE_BO_SIZE/8];
unsigned nused;
};
void radeon_semaphore_driver_fini(struct radeon_device *rdev);
int radeon_semaphore_create(struct radeon_device *rdev,
struct radeon_semaphore **semaphore);
void radeon_semaphore_emit_signal(struct radeon_device *rdev, int ring,
struct radeon_semaphore *semaphore);
void radeon_semaphore_emit_wait(struct radeon_device *rdev, int ring,
struct radeon_semaphore *semaphore);
void radeon_semaphore_free(struct radeon_device *rdev,
struct radeon_semaphore *semaphore);
/*
* GART structures, functions & helpers
*/
@ -641,6 +655,7 @@ void r600_blit_suspend(struct radeon_device *rdev);
int radeon_ib_get(struct radeon_device *rdev, int ring,
struct radeon_ib **ib, unsigned size);
void radeon_ib_free(struct radeon_device *rdev, struct radeon_ib **ib);
bool radeon_ib_try_free(struct radeon_device *rdev, struct radeon_ib *ib);
int radeon_ib_schedule(struct radeon_device *rdev, struct radeon_ib *ib);
int radeon_ib_pool_init(struct radeon_device *rdev);
void radeon_ib_pool_fini(struct radeon_device *rdev);

2
drivers/gpu/drm/radeon/radeon_device.c
View File

@ -731,7 +731,7 @@ int radeon_device_init(struct radeon_device *rdev,
INIT_LIST_HEAD(&rdev->gem.objects);
init_waitqueue_head(&rdev->irq.vblank_queue);
init_waitqueue_head(&rdev->irq.idle_queue);
INIT_LIST_HEAD(&rdev->semaphore_drv.free);
INIT_LIST_HEAD(&rdev->semaphore_drv.bo);
/* Set asic functions */
r = radeon_asic_init(rdev);

5
drivers/gpu/drm/radeon/radeon_ring.c
View File

@ -77,8 +77,7 @@ void radeon_ring_write(struct radeon_ring *ring, uint32_t v)
/*
* IB.
*/
static bool radeon_ib_try_free(struct radeon_device *rdev,
struct radeon_ib *ib)
bool radeon_ib_try_free(struct radeon_device *rdev, struct radeon_ib *ib)
{
bool done = false;
@ -148,7 +147,7 @@ retry:
/* this should be rare event, ie all ib scheduled none signaled yet.
*/
for (i = 0; i < RADEON_IB_POOL_SIZE; i++) {
if (rdev->ib_pool.ibs[idx].fence) {
if (rdev->ib_pool.ibs[idx].fence && rdev->ib_pool.ibs[idx].fence->emitted) {
r = radeon_fence_wait(rdev->ib_pool.ibs[idx].fence, false);
if (!r) {
goto retry;

167
drivers/gpu/drm/radeon/radeon_semaphore.c
View File

@ -31,90 +31,109 @@
#include "drm.h"
#include "radeon.h"
static int allocate_semaphores(struct radeon_device *rdev)
static int radeon_semaphore_add_bo(struct radeon_device *rdev)
{
const unsigned long bo_size = PAGE_SIZE * 4;
struct radeon_bo *bo;
struct list_head new_entrys;
struct radeon_semaphore_bo *bo;
unsigned long irq_flags;
uint64_t gpu_addr;
void *map;
int i, r;
uint32_t *cpu_ptr;
int r, i;
r = radeon_bo_create(rdev, bo_size, RADEON_GPU_PAGE_SIZE, true,
RADEON_GEM_DOMAIN_GTT, &bo);
bo = kmalloc(sizeof(struct radeon_semaphore_bo), GFP_KERNEL);
if (bo == NULL) {
return -ENOMEM;
}
INIT_LIST_HEAD(&bo->free);
INIT_LIST_HEAD(&bo->list);
bo->nused = 0;
r = radeon_ib_get(rdev, 0, &bo->ib, RADEON_SEMAPHORE_BO_SIZE);
if (r) {
dev_err(rdev->dev, "(%d) failed to allocate semaphore bo\n", r);
dev_err(rdev->dev, "failed to get a bo after 5 retry\n");
kfree(bo);
return r;
}
r = radeon_bo_reserve(bo, false);
if (r) {
radeon_bo_unref(&bo);
dev_err(rdev->dev, "(%d) failed to reserve semaphore bo\n", r);
return r;
}
r = radeon_bo_kmap(bo, &map);
if (r) {
radeon_bo_unreserve(bo);
radeon_bo_unref(&bo);
dev_err(rdev->dev, "(%d) semaphore map failed\n", r);
return r;
}
memset(map, 0, bo_size);
radeon_bo_kunmap(bo);
r = radeon_bo_pin(bo, RADEON_GEM_DOMAIN_VRAM, &gpu_addr);
if (r) {
radeon_bo_unreserve(bo);
radeon_bo_unref(&bo);
dev_err(rdev->dev, "(%d) semaphore pin failed\n", r);
return r;
}
INIT_LIST_HEAD(&new_entrys);
for (i = 0; i < bo_size/8; ++i) {
struct radeon_semaphore *sem = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL);
ttm_bo_reference(&bo->tbo);
sem->robj = bo;
sem->gpu_addr = gpu_addr;
gpu_addr = rdev->ib_pool.sa_manager.gpu_addr;
gpu_addr += bo->ib->sa_bo.offset;
cpu_ptr = rdev->ib_pool.sa_manager.cpu_ptr;
cpu_ptr += (bo->ib->sa_bo.offset >> 2);
for (i = 0; i < (RADEON_SEMAPHORE_BO_SIZE/8); i++) {
bo->semaphores[i].gpu_addr = gpu_addr;
bo->semaphores[i].cpu_ptr = cpu_ptr;
bo->semaphores[i].bo = bo;
list_add_tail(&bo->semaphores[i].list, &bo->free);
gpu_addr += 8;
list_add_tail(&sem->list, &new_entrys);
cpu_ptr += 2;
}
radeon_bo_unreserve(bo);
radeon_bo_unref(&bo);
write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags);
list_splice_tail(&new_entrys, &rdev->semaphore_drv.free);
list_add_tail(&bo->list, &rdev->semaphore_drv.bo);
write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
DRM_INFO("%d new semaphores allocated\n", (int)(bo_size/8));
return 0;
}
static void radeon_semaphore_del_bo_locked(struct radeon_device *rdev,
struct radeon_semaphore_bo *bo)
{
radeon_sa_bo_free(rdev, &bo->ib->sa_bo);
radeon_fence_unref(&bo->ib->fence);
list_del(&bo->list);
kfree(bo);
}
void radeon_semaphore_shrink_locked(struct radeon_device *rdev)
{
struct radeon_semaphore_bo *bo, *n;
if (list_empty(&rdev->semaphore_drv.bo)) {
return;
}
/* only shrink if first bo has free semaphore */
bo = list_first_entry(&rdev->semaphore_drv.bo, struct radeon_semaphore_bo, list);
if (list_empty(&bo->free)) {
return;
}
list_for_each_entry_safe_continue(bo, n, &rdev->semaphore_drv.bo, list) {
if (bo->nused)
continue;
radeon_semaphore_del_bo_locked(rdev, bo);
}
}
int radeon_semaphore_create(struct radeon_device *rdev,
struct radeon_semaphore **semaphore)
{
struct radeon_semaphore_bo *bo;
unsigned long irq_flags;
bool do_retry = true;
int r;
retry:
*semaphore = NULL;
write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags);
if (list_empty(&rdev->semaphore_drv.free)) {
int r;
write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
r = allocate_semaphores(rdev);
if (r)
return r;
write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags);
list_for_each_entry(bo, &rdev->semaphore_drv.bo, list) {
if (list_empty(&bo->free))
continue;
*semaphore = list_first_entry(&bo->free, struct radeon_semaphore, list);
(*semaphore)->cpu_ptr[0] = 0;
(*semaphore)->cpu_ptr[1] = 0;
list_del(&(*semaphore)->list);
bo->nused++;
break;
}
write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
if (*semaphore == NULL) {
if (do_retry) {
do_retry = false;
r = radeon_semaphore_add_bo(rdev);
if (r)
return r;
goto retry;
}
return -ENOMEM;
}
*semaphore = list_first_entry(&rdev->semaphore_drv.free, struct radeon_semaphore, list);
list_del(&(*semaphore)->list);
write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
return 0;
}
@ -131,31 +150,29 @@ void radeon_semaphore_emit_wait(struct radeon_device *rdev, int ring,
}
void radeon_semaphore_free(struct radeon_device *rdev,
struct radeon_semaphore *semaphore)
struct radeon_semaphore *semaphore)
{
unsigned long irq_flags;
write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags);
list_add_tail(&semaphore->list, &rdev->semaphore_drv.free);
semaphore->bo->nused--;
list_add_tail(&semaphore->list, &semaphore->bo->free);
radeon_semaphore_shrink_locked(rdev);
write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
}
void radeon_semaphore_driver_fini(struct radeon_device *rdev)
{
struct radeon_semaphore *i, *n;
struct list_head entrys;
struct radeon_semaphore_bo *bo, *n;
unsigned long irq_flags;
INIT_LIST_HEAD(&entrys);
write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags);
if (!list_empty(&rdev->semaphore_drv.free)) {
list_splice(&rdev->semaphore_drv.free, &entrys);
/* we force to free everything */
list_for_each_entry_safe(bo, n, &rdev->semaphore_drv.bo, list) {
if (!list_empty(&bo->free)) {
dev_err(rdev->dev, "still in use semaphore\n");
}
radeon_semaphore_del_bo_locked(rdev, bo);
}
INIT_LIST_HEAD(&rdev->semaphore_drv.free);
write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
list_for_each_entry_safe(i, n, &entrys, list) {
radeon_bo_unref(&i->robj);
kfree(i);
}
}