1 files changed, 581 insertions, 0 deletions

diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c
new file mode 100644
index 000000000000..489cb8cece4d
--- /dev/null
+++ b/drivers/gpu/drm/qxl/qxl_ttm.c
@@ -0,0 +1,581 @@
+/*
+ * Copyright 2013 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
+ * 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
+ *          Alon Levy
+ */
+
+#include <ttm/ttm_bo_api.h>
+#include <ttm/ttm_bo_driver.h>
+#include <ttm/ttm_placement.h>
+#include <ttm/ttm_page_alloc.h>
+#include <ttm/ttm_module.h>
+#include <drm/drmP.h>
+#include <drm/drm.h>
+#include <drm/qxl_drm.h>
+#include "qxl_drv.h"
+#include "qxl_object.h"
+
+#include <linux/delay.h>
+static int qxl_ttm_debugfs_init(struct qxl_device *qdev);
+
+static struct qxl_device *qxl_get_qdev(struct ttm_bo_device *bdev)
+{
+        struct qxl_mman *mman;
+        struct qxl_device *qdev;
+
+        mman = container_of(bdev, struct qxl_mman, bdev);
+        qdev = container_of(mman, struct qxl_device, mman);
+        return qdev;
+}
+
+static int qxl_ttm_mem_global_init(struct drm_global_reference *ref)
+{
+        return ttm_mem_global_init(ref->object);
+}
+
+static void qxl_ttm_mem_global_release(struct drm_global_reference *ref)
+{
+        ttm_mem_global_release(ref->object);
+}
+
+static int qxl_ttm_global_init(struct qxl_device *qdev)
+{
+        struct drm_global_reference *global_ref;
+        int r;
+
+        qdev->mman.mem_global_referenced = false;
+        global_ref = &qdev->mman.mem_global_ref;
+        global_ref->global_type = DRM_GLOBAL_TTM_MEM;
+        global_ref->size = sizeof(struct ttm_mem_global);
+        global_ref->init = &qxl_ttm_mem_global_init;
+        global_ref->release = &qxl_ttm_mem_global_release;
+
+        r = drm_global_item_ref(global_ref);
+        if (r != 0) {
+                DRM_ERROR("Failed setting up TTM memory accounting "
+                          "subsystem.\n");
+                return r;
+        }
+
+        qdev->mman.bo_global_ref.mem_glob =
+                qdev->mman.mem_global_ref.object;
+        global_ref = &qdev->mman.bo_global_ref.ref;
+        global_ref->global_type = DRM_GLOBAL_TTM_BO;
+        global_ref->size = sizeof(struct ttm_bo_global);
+        global_ref->init = &ttm_bo_global_init;
+        global_ref->release = &ttm_bo_global_release;
+        r = drm_global_item_ref(global_ref);
+        if (r != 0) {
+                DRM_ERROR("Failed setting up TTM BO subsystem.\n");
+                drm_global_item_unref(&qdev->mman.mem_global_ref);
+                return r;
+        }
+
+        qdev->mman.mem_global_referenced = true;
+        return 0;
+}
+
+static void qxl_ttm_global_fini(struct qxl_device *qdev)
+{
+        if (qdev->mman.mem_global_referenced) {
+                drm_global_item_unref(&qdev->mman.bo_global_ref.ref);
+                drm_global_item_unref(&qdev->mman.mem_global_ref);
+                qdev->mman.mem_global_referenced = false;
+        }
+}
+
+static struct vm_operations_struct qxl_ttm_vm_ops;
+static const struct vm_operations_struct *ttm_vm_ops;
+
+static int qxl_ttm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
+{
+        struct ttm_buffer_object *bo;
+        struct qxl_device *qdev;
+        int r;
+
+        bo = (struct ttm_buffer_object *)vma->vm_private_data;
+        if (bo == NULL)
+                return VM_FAULT_NOPAGE;
+        qdev = qxl_get_qdev(bo->bdev);
+        r = ttm_vm_ops->fault(vma, vmf);
+        return r;
+}
+
+int qxl_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+        struct drm_file *file_priv;
+        struct qxl_device *qdev;
+        int r;
+
+        if (unlikely(vma->vm_pgoff < DRM_FILE_PAGE_OFFSET)) {
+                pr_info("%s: vma->vm_pgoff (%ld) < DRM_FILE_PAGE_OFFSET\n",
+                        __func__, vma->vm_pgoff);
+                return drm_mmap(filp, vma);
+        }
+
+        file_priv = filp->private_data;
+        qdev = file_priv->minor->dev->dev_private;
+        if (qdev == NULL) {
+                DRM_ERROR(
+                 "filp->private_data->minor->dev->dev_private == NULL\n");
+                return -EINVAL;
+        }
+        QXL_INFO(qdev, "%s: filp->private_data = 0x%p, vma->vm_pgoff = %lx\n",
+                 __func__, filp->private_data, vma->vm_pgoff);
+
+        r = ttm_bo_mmap(filp, vma, &qdev->mman.bdev);
+        if (unlikely(r != 0))
+                return r;
+        if (unlikely(ttm_vm_ops == NULL)) {
+                ttm_vm_ops = vma->vm_ops;
+                qxl_ttm_vm_ops = *ttm_vm_ops;
+                qxl_ttm_vm_ops.fault = &qxl_ttm_fault;
+        }
+        vma->vm_ops = &qxl_ttm_vm_ops;
+        return 0;
+}
+
+static int qxl_invalidate_caches(struct ttm_bo_device *bdev, uint32_t flags)
+{
+        return 0;
+}
+
+static int qxl_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
+                             struct ttm_mem_type_manager *man)
+{
+        struct qxl_device *qdev;
+
+        qdev = qxl_get_qdev(bdev);
+
+        switch (type) {
+        case TTM_PL_SYSTEM:
+                /* System memory */
+                man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
+                man->available_caching = TTM_PL_MASK_CACHING;
+                man->default_caching = TTM_PL_FLAG_CACHED;
+                break;
+        case TTM_PL_VRAM:
+        case TTM_PL_PRIV0:
+                /* "On-card" video ram */
+                man->func = &ttm_bo_manager_func;
+                man->gpu_offset = 0;
+                man->flags = TTM_MEMTYPE_FLAG_FIXED |
+                             TTM_MEMTYPE_FLAG_MAPPABLE;
+                man->available_caching = TTM_PL_MASK_CACHING;
+                man->default_caching = TTM_PL_FLAG_CACHED;
+                break;
+        default:
+                DRM_ERROR("Unsupported memory type %u\n", (unsigned)type);
+                return -EINVAL;
+        }
+        return 0;
+}
+
+static void qxl_evict_flags(struct ttm_buffer_object *bo,
+                                struct ttm_placement *placement)
+{
+        struct qxl_bo *qbo;
+        static u32 placements = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
+
+        if (!qxl_ttm_bo_is_qxl_bo(bo)) {
+                placement->fpfn = 0;
+                placement->lpfn = 0;
+                placement->placement = &placements;
+                placement->busy_placement = &placements;
+                placement->num_placement = 1;
+                placement->num_busy_placement = 1;
+                return;
+        }
+        qbo = container_of(bo, struct qxl_bo, tbo);
+        qxl_ttm_placement_from_domain(qbo, QXL_GEM_DOMAIN_CPU);
+        *placement = qbo->placement;
+}
+
+static int qxl_verify_access(struct ttm_buffer_object *bo, struct file *filp)
+{
+        return 0;
+}
+
+static int qxl_ttm_io_mem_reserve(struct ttm_bo_device *bdev,
+                                  struct ttm_mem_reg *mem)
+{
+        struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
+        struct qxl_device *qdev = qxl_get_qdev(bdev);
+
+        mem->bus.addr = NULL;
+        mem->bus.offset = 0;
+        mem->bus.size = mem->num_pages << PAGE_SHIFT;
+        mem->bus.base = 0;
+        mem->bus.is_iomem = false;
+        if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
+                return -EINVAL;
+        switch (mem->mem_type) {
+        case TTM_PL_SYSTEM:
+                /* system memory */
+                return 0;
+        case TTM_PL_VRAM:
+                mem->bus.is_iomem = true;
+                mem->bus.base = qdev->vram_base;
+                mem->bus.offset = mem->start << PAGE_SHIFT;
+                break;
+        case TTM_PL_PRIV0:
+                mem->bus.is_iomem = true;
+                mem->bus.base = qdev->surfaceram_base;
+                mem->bus.offset = mem->start << PAGE_SHIFT;
+                break;
+        default:
+                return -EINVAL;
+        }
+        return 0;
+}
+
+static void qxl_ttm_io_mem_free(struct ttm_bo_device *bdev,
+                                struct ttm_mem_reg *mem)
+{
+}
+
+/*
+ * TTM backend functions.
+ */
+struct qxl_ttm_tt {
+        struct ttm_dma_tt               ttm;
+        struct qxl_device               *qdev;
+        u64                             offset;
+};
+
+static int qxl_ttm_backend_bind(struct ttm_tt *ttm,
+                                struct ttm_mem_reg *bo_mem)
+{
+        struct qxl_ttm_tt *gtt = (void *)ttm;
+
+        gtt->offset = (unsigned long)(bo_mem->start << PAGE_SHIFT);
+        if (!ttm->num_pages) {
+                WARN(1, "nothing to bind %lu pages for mreg %p back %p!\n",
+                     ttm->num_pages, bo_mem, ttm);
+        }
+        /* Not implemented */
+        return -1;
+}
+
+static int qxl_ttm_backend_unbind(struct ttm_tt *ttm)
+{
+        /* Not implemented */
+        return -1;
+}
+
+static void qxl_ttm_backend_destroy(struct ttm_tt *ttm)
+{
+        struct qxl_ttm_tt *gtt = (void *)ttm;
+
+        ttm_dma_tt_fini(&gtt->ttm);
+        kfree(gtt);
+}
+
+static struct ttm_backend_func qxl_backend_func = {
+        .bind = &qxl_ttm_backend_bind,
+        .unbind = &qxl_ttm_backend_unbind,
+        .destroy = &qxl_ttm_backend_destroy,
+};
+
+static int qxl_ttm_tt_populate(struct ttm_tt *ttm)
+{
+        int r;
+
+        if (ttm->state != tt_unpopulated)
+                return 0;
+
+        r = ttm_pool_populate(ttm);
+        if (r)
+                return r;
+
+        return 0;
+}
+
+static void qxl_ttm_tt_unpopulate(struct ttm_tt *ttm)
+{
+        ttm_pool_unpopulate(ttm);
+}
+
+static struct ttm_tt *qxl_ttm_tt_create(struct ttm_bo_device *bdev,
+                                        unsigned long size, uint32_t page_flags,
+                                        struct page *dummy_read_page)
+{
+        struct qxl_device *qdev;
+        struct qxl_ttm_tt *gtt;
+
+        qdev = qxl_get_qdev(bdev);
+        gtt = kzalloc(sizeof(struct qxl_ttm_tt), GFP_KERNEL);
+        if (gtt == NULL)
+                return NULL;
+        gtt->ttm.ttm.func = &qxl_backend_func;
+        gtt->qdev = qdev;
+        if (ttm_dma_tt_init(&gtt->ttm, bdev, size, page_flags,
+                            dummy_read_page)) {
+                kfree(gtt);
+                return NULL;
+        }
+        return &gtt->ttm.ttm;
+}
+
+static void qxl_move_null(struct ttm_buffer_object *bo,
+                             struct ttm_mem_reg *new_mem)
+{
+        struct ttm_mem_reg *old_mem = &bo->mem;
+
+        BUG_ON(old_mem->mm_node != NULL);
+        *old_mem = *new_mem;
+        new_mem->mm_node = NULL;
+}
+
+static int qxl_bo_move(struct ttm_buffer_object *bo,
+                       bool evict, bool interruptible,
+                       bool no_wait_gpu,
+                       struct ttm_mem_reg *new_mem)
+{
+        struct ttm_mem_reg *old_mem = &bo->mem;
+        if (old_mem->mem_type == TTM_PL_SYSTEM && bo->ttm == NULL) {
+                qxl_move_null(bo, new_mem);
+                return 0;
+        }
+        return ttm_bo_move_memcpy(bo, evict, no_wait_gpu, new_mem);
+}
+
+
+static int qxl_sync_obj_wait(void *sync_obj,
+                             bool lazy, bool interruptible)
+{
+        struct qxl_fence *qfence = (struct qxl_fence *)sync_obj;
+        int count = 0, sc = 0;
+        struct qxl_bo *bo = container_of(qfence, struct qxl_bo, fence);
+
+        if (qfence->num_active_releases == 0)
+                return 0;
+
+retry:
+        if (sc == 0) {
+                if (bo->type == QXL_GEM_DOMAIN_SURFACE)
+                        qxl_update_surface(qfence->qdev, bo);
+        } else if (sc >= 1) {
+                qxl_io_notify_oom(qfence->qdev);
+        }
+
+        sc++;
+
+        for (count = 0; count < 10; count++) {
+                bool ret;
+                ret = qxl_queue_garbage_collect(qfence->qdev, true);
+                if (ret == false)
+                        break;
+
+                if (qfence->num_active_releases == 0)
+                        return 0;
+        }
+
+        if (qfence->num_active_releases) {
+                bool have_drawable_releases = false;
+                void **slot;
+                struct radix_tree_iter iter;
+                int release_id;
+
+                radix_tree_for_each_slot(slot, &qfence->tree, &iter, 0) {
+                        struct qxl_release *release;
+
+                        release_id = iter.index;
+                        release = qxl_release_from_id_locked(qfence->qdev, release_id);
+                        if (release == NULL)
+                                continue;
+
+                        if (release->type == QXL_RELEASE_DRAWABLE)
+                                have_drawable_releases = true;
+                }
+
+                qxl_queue_garbage_collect(qfence->qdev, true);
+
+                if (have_drawable_releases || sc < 4) {
+                        if (sc > 2)
+                                /* back off */
+                                usleep_range(500, 1000);
+                        if (have_drawable_releases && sc > 300) {
+                                WARN(1, "sync obj %d still has outstanding releases %d %d %d %ld %d\n", sc, bo->surface_id, bo->is_primary, bo->pin_count, (unsigned long)bo->gem_base.size, qfence->num_active_releases);
+                                return -EBUSY;
+                        }
+                        goto retry;
+                }
+        }
+        return 0;
+}
+
+static int qxl_sync_obj_flush(void *sync_obj)
+{
+        return 0;
+}
+
+static void qxl_sync_obj_unref(void **sync_obj)
+{
+}
+
+static void *qxl_sync_obj_ref(void *sync_obj)
+{
+        return sync_obj;
+}
+
+static bool qxl_sync_obj_signaled(void *sync_obj)
+{
+        struct qxl_fence *qfence = (struct qxl_fence *)sync_obj;
+        return (qfence->num_active_releases == 0);
+}
+
+static void qxl_bo_move_notify(struct ttm_buffer_object *bo,
+                               struct ttm_mem_reg *new_mem)
+{
+        struct qxl_bo *qbo;
+        struct qxl_device *qdev;
+
+        if (!qxl_ttm_bo_is_qxl_bo(bo))
+                return;
+        qbo = container_of(bo, struct qxl_bo, tbo);
+        qdev = qbo->gem_base.dev->dev_private;
+
+        if (bo->mem.mem_type == TTM_PL_PRIV0 && qbo->surface_id)
+                qxl_surface_evict(qdev, qbo, new_mem ? true : false);
+}
+
+static struct ttm_bo_driver qxl_bo_driver = {
+        .ttm_tt_create = &qxl_ttm_tt_create,
+        .ttm_tt_populate = &qxl_ttm_tt_populate,
+        .ttm_tt_unpopulate = &qxl_ttm_tt_unpopulate,
+        .invalidate_caches = &qxl_invalidate_caches,
+        .init_mem_type = &qxl_init_mem_type,
+        .evict_flags = &qxl_evict_flags,
+        .move = &qxl_bo_move,
+        .verify_access = &qxl_verify_access,
+        .io_mem_reserve = &qxl_ttm_io_mem_reserve,
+        .io_mem_free = &qxl_ttm_io_mem_free,
+        .sync_obj_signaled = &qxl_sync_obj_signaled,
+        .sync_obj_wait = &qxl_sync_obj_wait,
+        .sync_obj_flush = &qxl_sync_obj_flush,
+        .sync_obj_unref = &qxl_sync_obj_unref,
+        .sync_obj_ref = &qxl_sync_obj_ref,
+        .move_notify = &qxl_bo_move_notify,
+};
+
+
+
+int qxl_ttm_init(struct qxl_device *qdev)
+{
+        int r;
+        int num_io_pages; /* != rom->num_io_pages, we include surface0 */
+
+        r = qxl_ttm_global_init(qdev);
+        if (r)
+                return r;
+        /* No others user of address space so set it to 0 */
+        r = ttm_bo_device_init(&qdev->mman.bdev,
+                               qdev->mman.bo_global_ref.ref.object,
+                               &qxl_bo_driver, DRM_FILE_PAGE_OFFSET, 0);
+        if (r) {
+                DRM_ERROR("failed initializing buffer object driver(%d).\n", r);
+                return r;
+        }
+        /* NOTE: this includes the framebuffer (aka surface 0) */
+        num_io_pages = qdev->rom->ram_header_offset / PAGE_SIZE;
+        r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_VRAM,
+                           num_io_pages);
+        if (r) {
+                DRM_ERROR("Failed initializing VRAM heap.\n");
+                return r;
+        }
+        r = ttm_bo_init_mm(&qdev->mman.bdev, TTM_PL_PRIV0,
+                           qdev->surfaceram_size / PAGE_SIZE);
+        if (r) {
+                DRM_ERROR("Failed initializing Surfaces heap.\n");
+                return r;
+        }
+        DRM_INFO("qxl: %uM of VRAM memory size\n",
+                 (unsigned)qdev->vram_size / (1024 * 1024));
+        DRM_INFO("qxl: %luM of IO pages memory ready (VRAM domain)\n",
+                 ((unsigned)num_io_pages * PAGE_SIZE) / (1024 * 1024));
+        if (unlikely(qdev->mman.bdev.dev_mapping == NULL))
+                qdev->mman.bdev.dev_mapping = qdev->ddev->dev_mapping;
+        r = qxl_ttm_debugfs_init(qdev);
+        if (r) {
+                DRM_ERROR("Failed to init debugfs\n");
+                return r;
+        }
+        return 0;
+}
+
+void qxl_ttm_fini(struct qxl_device *qdev)
+{
+        ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_VRAM);
+        ttm_bo_clean_mm(&qdev->mman.bdev, TTM_PL_PRIV0);
+        ttm_bo_device_release(&qdev->mman.bdev);
+        qxl_ttm_global_fini(qdev);
+        DRM_INFO("qxl: ttm finalized\n");
+}
+
+
+#define QXL_DEBUGFS_MEM_TYPES 2
+
+#if defined(CONFIG_DEBUG_FS)
+static int qxl_mm_dump_table(struct seq_file *m, void *data)
+{
+        struct drm_info_node *node = (struct drm_info_node *)m->private;
+        struct drm_mm *mm = (struct drm_mm *)node->info_ent->data;
+        struct drm_device *dev = node->minor->dev;
+        struct qxl_device *rdev = dev->dev_private;
+        int ret;
+        struct ttm_bo_global *glob = rdev->mman.bdev.glob;
+
+        spin_lock(&glob->lru_lock);
+        ret = drm_mm_dump_table(m, mm);
+        spin_unlock(&glob->lru_lock);
+        return ret;
+}
+#endif
+
+static int qxl_ttm_debugfs_init(struct qxl_device *qdev)
+{
+#if defined(CONFIG_DEBUG_FS)
+        static struct drm_info_list qxl_mem_types_list[QXL_DEBUGFS_MEM_TYPES];
+        static char qxl_mem_types_names[QXL_DEBUGFS_MEM_TYPES][32];
+        unsigned i;
+
+        for (i = 0; i < QXL_DEBUGFS_MEM_TYPES; i++) {
+                if (i == 0)
+                        sprintf(qxl_mem_types_names[i], "qxl_mem_mm");
+                else
+                        sprintf(qxl_mem_types_names[i], "qxl_surf_mm");
+                qxl_mem_types_list[i].name = qxl_mem_types_names[i];
+                qxl_mem_types_list[i].show = &qxl_mm_dump_table;
+                qxl_mem_types_list[i].driver_features = 0;
+                if (i == 0)
+                        qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_VRAM].priv;
+                else
+                        qxl_mem_types_list[i].data = qdev->mman.bdev.man[TTM_PL_PRIV0].priv;
+
+        }
+        return qxl_debugfs_add_files(qdev, qxl_mem_types_list, i);
+#else
+        return 0;
+#endif
+}