--- /dev/null
+/*
+ * 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 "qxl_drv.h"
+#include "qxl_object.h"
+#include <trace/events/fence.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 fence *fence)
+{
+ return "qxl";
+}
+
+static const char *qxl_get_timeline_name(struct fence *fence)
+{
+ return "release";
+}
+
+static bool qxl_nop_signaling(struct fence *fence)
+{
+ /* fences are always automatically signaled, so just pretend we did this.. */
+ return true;
+}
+
+static long qxl_fence_wait(struct 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 (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 (fence_is_signaled(fence))
+ goto signaled;
+ }
+
+ if (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) {
+ FENCE_WARN(fence, "failed to wait on release %d "
+ "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 fence_ops qxl_fence_ops = {
+ .get_driver_name = qxl_get_driver_name,
+ .get_timeline_name = qxl_get_timeline_name,
+ .enable_signaling = qxl_nop_signaling,
+ .wait = qxl_fence_wait,
+};
+
+static uint64_t
+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 0;
+ }
+ 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;
+ QXL_INFO(qdev, "allocated release %lld\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);
+ }
+}
+
+void
+qxl_release_free(struct qxl_device *qdev,
+ struct qxl_release *release)
+{
+ QXL_INFO(qdev, "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);
+
+ fence_signal(&release->base);
+ 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)
+{
+ int ret;
+ /* pin releases bo's they are too messy to evict */
+ ret = qxl_bo_create(qdev, PAGE_SIZE, false, true,
+ QXL_GEM_DOMAIN_VRAM, NULL,
+ bo);
+ return ret;
+}
+
+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.shared = false;
+ list_add_tail(&entry->tv.head, &release->bos);
+ return 0;
+}
+
+static int qxl_release_validate_bo(struct qxl_bo *bo)
+{
+ int ret;
+
+ if (!bo->pin_count) {
+ qxl_ttm_placement_from_domain(bo, bo->type, false);
+ ret = ttm_bo_validate(&bo->tbo, &bo->placement,
+ true, false);
+ if (ret)
+ return ret;
+ }
+
+ ret = reservation_object_reserve_shared(bo->tbo.resv);
+ if (ret)
+ return ret;
+
+ /* allocate a surface for reserved + validated buffers */
+ ret = qxl_bo_check_id(bo->gem_base.dev->dev_private, 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_list *entry = list_first_entry(&create_rel->bos, struct qxl_bo_list, tv.head);
+ 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 = qxl_bo_ref(to_qxl_bo(entry->tv.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);
+
+ qxl_bo_unref(&bo);
+ 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;
+
+ if (type == QXL_RELEASE_DRAWABLE)
+ cur_idx = 0;
+ else if (type == QXL_RELEASE_SURFACE_CMD)
+ cur_idx = 1;
+ else if (type == QXL_RELEASE_CURSOR_CMD)
+ cur_idx = 2;
+ 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]);
+ if (ret) {
+ mutex_unlock(&qdev->release_mutex);
+ return ret;
+ }
+ }
+
+ bo = qxl_bo_ref(qdev->current_release_bo[cur_idx]);
+
+ (*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);
+
+ qxl_release_list_add(*release, bo);
+
+ info = qxl_release_map(qdev, *release);
+ info->id = idr_ret;
+ qxl_release_unmap(qdev, *release, info);
+
+ qxl_bo_unref(&bo);
+ 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_list *entry = list_first_entry(&release->bos, struct qxl_bo_list, tv.head);
+ struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);
+
+ ptr = qxl_bo_kmap_atomic_page(qdev, bo, release->release_offset & PAGE_SIZE);
+ if (!ptr)
+ return NULL;
+ info = ptr + (release->release_offset & ~PAGE_SIZE);
+ return info;
+}
+
+void qxl_release_unmap(struct qxl_device *qdev,
+ struct qxl_release *release,
+ union qxl_release_info *info)
+{
+ struct qxl_bo_list *entry = list_first_entry(&release->bos, struct qxl_bo_list, tv.head);
+ struct qxl_bo *bo = to_qxl_bo(entry->tv.bo);
+ void *ptr;
+
+ ptr = ((void *)info) - (release->release_offset & ~PAGE_SIZE);
+ 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_global *glob;
+ struct ttm_bo_device *bdev;
+ struct ttm_bo_driver *driver;
+ struct qxl_bo *qbo;
+ 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.
+ */
+ fence_init(&release->base, &qxl_fence_ops, &qdev->release_lock,
+ release->id | 0xf0000000, release->base.seqno);
+ trace_fence_emit(&release->base);
+
+ driver = bdev->driver;
+ glob = bo->glob;
+
+ spin_lock(&glob->lru_lock);
+
+ list_for_each_entry(entry, &release->bos, head) {
+ bo = entry->bo;
+ qbo = to_qxl_bo(bo);
+
+ reservation_object_add_shared_fence(bo->resv, &release->base);
+ ttm_bo_add_to_lru(bo);
+ __ttm_bo_unreserve(bo);
+ }
+ spin_unlock(&glob->lru_lock);
+ ww_acquire_fini(&release->ticket);
+}
+
Code Review / kvmfornfv.git / blobdiff