diff options
Diffstat (limited to 'drivers/gpu/drm/qxl/qxl_release.c')
| -rw-r--r-- | drivers/gpu/drm/qxl/qxl_release.c | 471 |
1 files changed, 471 insertions, 0 deletions
diff --git a/drivers/gpu/drm/qxl/qxl_release.c b/drivers/gpu/drm/qxl/qxl_release.c new file mode 100644 index 000000000..b2a475a0c --- /dev/null +++ b/drivers/gpu/drm/qxl/qxl_release.c @@ -0,0 +1,471 @@ +/* + * Copyright 2011 Red Hat, Inc. + * + * 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 + * on the rights to use, copy, modify, merge, publish, distribute, sub + * license, 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 (including the next + * paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS 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. + */ + +#include <linux/delay.h> + +#include <trace/events/dma_fence.h> + +#include "qxl_drv.h" +#include "qxl_object.h" + +/* + * drawable cmd cache - allocate a bunch of VRAM pages, suballocate + * into 256 byte chunks for now - gives 16 cmds per page. + * + * use an ida to index into the chunks? + */ +/* manage releaseables */ +/* stack them 16 high for now -drawable object is 191 */ +#define RELEASE_SIZE 256 +#define RELEASES_PER_BO (4096 / RELEASE_SIZE) +/* put an alloc/dealloc surface cmd into one bo and round up to 128 */ +#define SURFACE_RELEASE_SIZE 128 +#define SURFACE_RELEASES_PER_BO (4096 / SURFACE_RELEASE_SIZE) + +static const int release_size_per_bo[] = { RELEASE_SIZE, SURFACE_RELEASE_SIZE, RELEASE_SIZE }; +static const int releases_per_bo[] = { RELEASES_PER_BO, SURFACE_RELEASES_PER_BO, RELEASES_PER_BO }; + +static const char *qxl_get_driver_name(struct dma_fence *fence) +{ + return "qxl"; +} + +static const char *qxl_get_timeline_name(struct dma_fence *fence) +{ + return "release"; +} + +static long qxl_fence_wait(struct dma_fence *fence, bool intr, + signed long timeout) +{ + struct qxl_device *qdev; + struct qxl_release *release; + int count = 0, sc = 0; + bool have_drawable_releases; + unsigned long cur, end = jiffies + timeout; + + qdev = container_of(fence->lock, struct qxl_device, release_lock); + release = container_of(fence, struct qxl_release, base); + have_drawable_releases = release->type == QXL_RELEASE_DRAWABLE; + +retry: + sc++; + + if (dma_fence_is_signaled(fence)) + goto signaled; + + qxl_io_notify_oom(qdev); + + for (count = 0; count < 11; count++) { + if (!qxl_queue_garbage_collect(qdev, true)) + break; + + if (dma_fence_is_signaled(fence)) + goto signaled; + } + + if (dma_fence_is_signaled(fence)) + goto signaled; + + if (have_drawable_releases || sc < 4) { + if (sc > 2) + /* back off */ + usleep_range(500, 1000); + + if (time_after(jiffies, end)) + return 0; + + if (have_drawable_releases && sc > 300) { + DMA_FENCE_WARN(fence, "failed to wait on release %llu " + "after spincount %d\n", + fence->context & ~0xf0000000, sc); + goto signaled; + } + goto retry; + } + /* + * yeah, original sync_obj_wait gave up after 3 spins when + * have_drawable_releases is not set. + */ + +signaled: + cur = jiffies; + if (time_after(cur, end)) + return 0; + return end - cur; +} + +static const struct dma_fence_ops qxl_fence_ops = { + .get_driver_name = qxl_get_driver_name, + .get_timeline_name = qxl_get_timeline_name, + .wait = qxl_fence_wait, +}; + +static int +qxl_release_alloc(struct qxl_device *qdev, int type, + struct qxl_release **ret) +{ + struct qxl_release *release; + int handle; + size_t size = sizeof(*release); + + release = kmalloc(size, GFP_KERNEL); + if (!release) { + DRM_ERROR("Out of memory\n"); + return -ENOMEM; + } + release->base.ops = NULL; + release->type = type; + release->release_offset = 0; + release->surface_release_id = 0; + INIT_LIST_HEAD(&release->bos); + + idr_preload(GFP_KERNEL); + spin_lock(&qdev->release_idr_lock); + handle = idr_alloc(&qdev->release_idr, release, 1, 0, GFP_NOWAIT); + release->base.seqno = ++qdev->release_seqno; + spin_unlock(&qdev->release_idr_lock); + idr_preload_end(); + if (handle < 0) { + kfree(release); + *ret = NULL; + return handle; + } + *ret = release; + DRM_DEBUG_DRIVER("allocated release %d\n", handle); + release->id = handle; + return handle; +} + +static void +qxl_release_free_list(struct qxl_release *release) +{ + while (!list_empty(&release->bos)) { + struct qxl_bo_list *entry; + struct qxl_bo *bo; + + entry = container_of(release->bos.next, + struct qxl_bo_list, tv.head); + bo = to_qxl_bo(entry->tv.bo); + qxl_bo_unref(&bo); + list_del(&entry->tv.head); + kfree(entry); + } + release->release_bo = NULL; +} + +void +qxl_release_free(struct qxl_device *qdev, + struct qxl_release *release) +{ + DRM_DEBUG_DRIVER("release %d, type %d\n", release->id, release->type); + + if (release->surface_release_id) + qxl_surface_id_dealloc(qdev, release->surface_release_id); + + spin_lock(&qdev->release_idr_lock); + idr_remove(&qdev->release_idr, release->id); + spin_unlock(&qdev->release_idr_lock); + + if (release->base.ops) { + WARN_ON(list_empty(&release->bos)); + qxl_release_free_list(release); + + dma_fence_signal(&release->base); + dma_fence_put(&release->base); + } else { + qxl_release_free_list(release); + kfree(release); + } +} + +static int qxl_release_bo_alloc(struct qxl_device *qdev, + struct qxl_bo **bo, + u32 priority) +{ + /* pin releases bo's they are too messy to evict */ + return qxl_bo_create(qdev, PAGE_SIZE, false, true, + QXL_GEM_DOMAIN_VRAM, priority, NULL, bo); +} + +int qxl_release_list_add(struct qxl_release *release, struct qxl_bo *bo) +{ + struct qxl_bo_list *entry; + + list_for_each_entry(entry, &release->bos, tv.head) { + if (entry->tv.bo == &bo->tbo) + return 0; + } + + entry = kmalloc(sizeof(struct qxl_bo_list), GFP_KERNEL); + if (!entry) + return -ENOMEM; + + qxl_bo_ref(bo); + entry->tv.bo = &bo->tbo; + entry->tv.num_shared = 0; + list_add_tail(&entry->tv.head, &release->bos); + return 0; +} + +static int qxl_release_validate_bo(struct qxl_bo *bo) +{ + struct ttm_operation_ctx ctx = { true, false }; + int ret; + + if (!bo->pin_count) { + qxl_ttm_placement_from_domain(bo, bo->type, false); + ret = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx); + if (ret) + return ret; + } + + ret = dma_resv_reserve_shared(bo->tbo.base.resv, 1); + if (ret) + return ret; + + /* allocate a surface for reserved + validated buffers */ + ret = qxl_bo_check_id(to_qxl(bo->tbo.base.dev), bo); + if (ret) + return ret; + return 0; +} + +int qxl_release_reserve_list(struct qxl_release *release, bool no_intr) +{ + int ret; + struct qxl_bo_list *entry; + + /* if only one object on the release its the release itself + since these objects are pinned no need to reserve */ + if (list_is_singular(&release->bos)) + return 0; + + ret = ttm_eu_reserve_buffers(&release->ticket, &release->bos, + !no_intr, NULL); + if (ret) + return ret; + + list_for_each_entry(entry, &release->bos, tv.head) { + struct qxl_bo *bo = to_qxl_bo(entry->tv.bo); + + ret = qxl_release_validate_bo(bo); + if (ret) { + ttm_eu_backoff_reservation(&release->ticket, &release->bos); + return ret; + } + } + return 0; +} + +void qxl_release_backoff_reserve_list(struct qxl_release *release) +{ + /* if only one object on the release its the release itself + since these objects are pinned no need to reserve */ + if (list_is_singular(&release->bos)) + return; + + ttm_eu_backoff_reservation(&release->ticket, &release->bos); +} + +int qxl_alloc_surface_release_reserved(struct qxl_device *qdev, + enum qxl_surface_cmd_type surface_cmd_type, + struct qxl_release *create_rel, + struct qxl_release **release) +{ + if (surface_cmd_type == QXL_SURFACE_CMD_DESTROY && create_rel) { + int idr_ret; + struct qxl_bo *bo; + union qxl_release_info *info; + + /* stash the release after the create command */ + idr_ret = qxl_release_alloc(qdev, QXL_RELEASE_SURFACE_CMD, release); + if (idr_ret < 0) + return idr_ret; + bo = create_rel->release_bo; + + (*release)->release_bo = bo; + (*release)->release_offset = create_rel->release_offset + 64; + + qxl_release_list_add(*release, bo); + + info = qxl_release_map(qdev, *release); + info->id = idr_ret; + qxl_release_unmap(qdev, *release, info); + return 0; + } + + return qxl_alloc_release_reserved(qdev, sizeof(struct qxl_surface_cmd), + QXL_RELEASE_SURFACE_CMD, release, NULL); +} + +int qxl_alloc_release_reserved(struct qxl_device *qdev, unsigned long size, + int type, struct qxl_release **release, + struct qxl_bo **rbo) +{ + struct qxl_bo *bo; + int idr_ret; + int ret = 0; + union qxl_release_info *info; + int cur_idx; + u32 priority; + + if (type == QXL_RELEASE_DRAWABLE) { + cur_idx = 0; + priority = 0; + } else if (type == QXL_RELEASE_SURFACE_CMD) { + cur_idx = 1; + priority = 1; + } else if (type == QXL_RELEASE_CURSOR_CMD) { + cur_idx = 2; + priority = 1; + } + else { + DRM_ERROR("got illegal type: %d\n", type); + return -EINVAL; + } + + idr_ret = qxl_release_alloc(qdev, type, release); + if (idr_ret < 0) { + if (rbo) + *rbo = NULL; + return idr_ret; + } + + mutex_lock(&qdev->release_mutex); + if (qdev->current_release_bo_offset[cur_idx] + 1 >= releases_per_bo[cur_idx]) { + qxl_bo_unref(&qdev->current_release_bo[cur_idx]); + qdev->current_release_bo_offset[cur_idx] = 0; + qdev->current_release_bo[cur_idx] = NULL; + } + if (!qdev->current_release_bo[cur_idx]) { + ret = qxl_release_bo_alloc(qdev, &qdev->current_release_bo[cur_idx], priority); + if (ret) { + mutex_unlock(&qdev->release_mutex); + qxl_release_free(qdev, *release); + return ret; + } + } + + bo = qxl_bo_ref(qdev->current_release_bo[cur_idx]); + + (*release)->release_bo = bo; + (*release)->release_offset = qdev->current_release_bo_offset[cur_idx] * release_size_per_bo[cur_idx]; + qdev->current_release_bo_offset[cur_idx]++; + + if (rbo) + *rbo = bo; + + mutex_unlock(&qdev->release_mutex); + + ret = qxl_release_list_add(*release, bo); + qxl_bo_unref(&bo); + if (ret) { + qxl_release_free(qdev, *release); + return ret; + } + + info = qxl_release_map(qdev, *release); + info->id = idr_ret; + qxl_release_unmap(qdev, *release, info); + + return ret; +} + +struct qxl_release *qxl_release_from_id_locked(struct qxl_device *qdev, + uint64_t id) +{ + struct qxl_release *release; + + spin_lock(&qdev->release_idr_lock); + release = idr_find(&qdev->release_idr, id); + spin_unlock(&qdev->release_idr_lock); + if (!release) { + DRM_ERROR("failed to find id in release_idr\n"); + return NULL; + } + + return release; +} + +union qxl_release_info *qxl_release_map(struct qxl_device *qdev, + struct qxl_release *release) +{ + void *ptr; + union qxl_release_info *info; + struct qxl_bo *bo = release->release_bo; + + ptr = qxl_bo_kmap_atomic_page(qdev, bo, release->release_offset & PAGE_MASK); + if (!ptr) + return NULL; + info = ptr + (release->release_offset & ~PAGE_MASK); + return info; +} + +void qxl_release_unmap(struct qxl_device *qdev, + struct qxl_release *release, + union qxl_release_info *info) +{ + struct qxl_bo *bo = release->release_bo; + void *ptr; + + ptr = ((void *)info) - (release->release_offset & ~PAGE_MASK); + qxl_bo_kunmap_atomic_page(qdev, bo, ptr); +} + +void qxl_release_fence_buffer_objects(struct qxl_release *release) +{ + struct ttm_buffer_object *bo; + struct ttm_bo_device *bdev; + struct ttm_validate_buffer *entry; + struct qxl_device *qdev; + + /* if only one object on the release its the release itself + since these objects are pinned no need to reserve */ + if (list_is_singular(&release->bos) || list_empty(&release->bos)) + return; + + bo = list_first_entry(&release->bos, struct ttm_validate_buffer, head)->bo; + bdev = bo->bdev; + qdev = container_of(bdev, struct qxl_device, mman.bdev); + + /* + * Since we never really allocated a context and we don't want to conflict, + * set the highest bits. This will break if we really allow exporting of dma-bufs. + */ + dma_fence_init(&release->base, &qxl_fence_ops, &qdev->release_lock, + release->id | 0xf0000000, release->base.seqno); + trace_dma_fence_emit(&release->base); + + spin_lock(&ttm_bo_glob.lru_lock); + + list_for_each_entry(entry, &release->bos, head) { + bo = entry->bo; + + dma_resv_add_shared_fence(bo->base.resv, &release->base); + ttm_bo_move_to_lru_tail(bo, NULL); + dma_resv_unlock(bo->base.resv); + } + spin_unlock(&ttm_bo_glob.lru_lock); + ww_acquire_fini(&release->ticket); +} + |