Merge branch 'for-next' of git://github.com/rydberg/linux into next

Pull in changes from Henrik: "a trivial MT documentation fix".

1 files changed, 304 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 00000000000..b443d6751d5
--- /dev/null
+++ b/drivers/gpu/drm/qxl/qxl_release.c
@@ -0,0 +1,304 @@
+/*
+ * 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"
+
+/*
+ * 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 };
+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);
+	int idr_ret;
+
+	release = kmalloc(size, GFP_KERNEL);
+	if (!release) {
+		DRM_ERROR("Out of memory\n");
+		return 0;
+	}
+	release->type = type;
+	release->bo_count = 0;
+	release->release_offset = 0;
+	release->surface_release_id = 0;
+
+	idr_preload(GFP_KERNEL);
+	spin_lock(&qdev->release_idr_lock);
+	idr_ret = idr_alloc(&qdev->release_idr, release, 1, 0, GFP_NOWAIT);
+	spin_unlock(&qdev->release_idr_lock);
+	idr_preload_end();
+	handle = idr_ret;
+	if (idr_ret < 0)
+		goto release_fail;
+	*ret = release;
+	QXL_INFO(qdev, "allocated release %lld\n", handle);
+	release->id = handle;
+release_fail:
+
+	return handle;
+}
+
+void
+qxl_release_free(struct qxl_device *qdev,
+		 struct qxl_release *release)
+{
+	int i;
+
+	QXL_INFO(qdev, "release %d, type %d, %d bos\n", release->id,
+		 release->type, release->bo_count);
+
+	if (release->surface_release_id)
+		qxl_surface_id_dealloc(qdev, release->surface_release_id);
+
+	for (i = 0 ; i < release->bo_count; ++i) {
+		QXL_INFO(qdev, "release %llx\n",
+			release->bos[i]->tbo.addr_space_offset
+						- DRM_FILE_OFFSET);
+		qxl_fence_remove_release(&release->bos[i]->fence, release->id);
+		qxl_bo_unref(&release->bos[i]);
+	}
+	spin_lock(&qdev->release_idr_lock);
+	idr_remove(&qdev->release_idr, release->id);
+	spin_unlock(&qdev->release_idr_lock);
+	kfree(release);
+}
+
+void
+qxl_release_add_res(struct qxl_device *qdev, struct qxl_release *release,
+		    struct qxl_bo *bo)
+{
+	int i;
+	for (i = 0; i < release->bo_count; i++)
+		if (release->bos[i] == bo)
+			return;
+
+	if (release->bo_count >= QXL_MAX_RES) {
+		DRM_ERROR("exceeded max resource on a qxl_release item\n");
+		return;
+	}
+	release->bos[release->bo_count++] = qxl_bo_ref(bo);
+}
+
+static int qxl_release_bo_alloc(struct qxl_device *qdev,
+				struct qxl_bo **bo)
+{
+	int ret;
+	ret = qxl_bo_create(qdev, PAGE_SIZE, false, QXL_GEM_DOMAIN_VRAM, NULL,
+			    bo);
+	return ret;
+}
+
+int qxl_release_reserve(struct qxl_device *qdev,
+			struct qxl_release *release, bool no_wait)
+{
+	int ret;
+	if (atomic_inc_return(&release->bos[0]->reserve_count) == 1) {
+		ret = qxl_bo_reserve(release->bos[0], no_wait);
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
+
+void qxl_release_unreserve(struct qxl_device *qdev,
+			  struct qxl_release *release)
+{
+	if (atomic_dec_and_test(&release->bos[0]->reserve_count))
+		qxl_bo_unreserve(release->bos[0]);
+}
+
+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)
+{
+	int ret;
+
+	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);
+		bo = qxl_bo_ref(create_rel->bos[0]);
+
+		(*release)->release_offset = create_rel->release_offset + 64;
+
+		qxl_release_add_res(qdev, *release, bo);
+
+		ret = qxl_release_reserve(qdev, *release, false);
+		if (ret) {
+			DRM_ERROR("release reserve failed\n");
+			goto out_unref;
+		}
+		info = qxl_release_map(qdev, *release);
+		info->id = idr_ret;
+		qxl_release_unmap(qdev, *release, info);
+
+
+out_unref:
+		qxl_bo_unref(&bo);
+		return ret;
+	}
+
+	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;
+	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);
+
+	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;
+		}
+
+		/* pin releases bo's they are too messy to evict */
+		ret = qxl_bo_reserve(qdev->current_release_bo[cur_idx], false);
+		qxl_bo_pin(qdev->current_release_bo[cur_idx], QXL_GEM_DOMAIN_VRAM, NULL);
+		qxl_bo_unreserve(qdev->current_release_bo[cur_idx]);
+	}
+
+	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;
+
+	qxl_release_add_res(qdev, *release, bo);
+
+	ret = qxl_release_reserve(qdev, *release, false);
+	mutex_unlock(&qdev->release_mutex);
+	if (ret)
+		goto out_unref;
+
+	info = qxl_release_map(qdev, *release);
+	info->id = idr_ret;
+	qxl_release_unmap(qdev, *release, info);
+
+out_unref:
+	qxl_bo_unref(&bo);
+	return ret;
+}
+
+int qxl_fence_releaseable(struct qxl_device *qdev,
+			  struct qxl_release *release)
+{
+	int i, ret;
+	for (i = 0; i < release->bo_count; i++) {
+		if (!release->bos[i]->tbo.sync_obj)
+			release->bos[i]->tbo.sync_obj = &release->bos[i]->fence;
+		ret = qxl_fence_add_release(&release->bos[i]->fence, release->id);
+		if (ret)
+			return ret;
+	}
+	return 0;
+}
+
+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;
+	}
+	if (release->bo_count < 1) {
+		DRM_ERROR("read a released resource with 0 bos\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->bos[0];
+
+	ptr = qxl_bo_kmap_atomic_page(qdev, bo, release->release_offset & PAGE_SIZE);
+	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 *bo = release->bos[0];
+	void *ptr;
+
+	ptr = ((void *)info) - (release->release_offset & ~PAGE_SIZE);
+	qxl_bo_kunmap_atomic_page(qdev, bo, ptr);
+}