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-rw-r--r--linux-core/drm_bufs.c4
-rw-r--r--linux-core/drm_dma.c2
-rw-r--r--linux-core/drm_drv.c2
-rw-r--r--linux-core/drm_fops.c7
-rw-r--r--linux-core/drm_memory.c1
-rw-r--r--linux-core/radeon_gem.c248
6 files changed, 260 insertions, 4 deletions
diff --git a/linux-core/drm_bufs.c b/linux-core/drm_bufs.c
index e9052570..c966badc 100644
--- a/linux-core/drm_bufs.c
+++ b/linux-core/drm_bufs.c
@@ -1528,6 +1528,7 @@ int drm_mapbufs(struct drm_device *dev, void *data,
dev->buf_use++; /* Can't allocate more after this call */
spin_unlock(&dev->count_lock);
+ DRM_DEBUG("dma buf count %d, req count %d\n", request->count, dma->buf_count);
if (request->count >= dma->buf_count) {
if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP))
|| (drm_core_check_feature(dev, DRIVER_SG)
@@ -1538,10 +1539,12 @@ int drm_mapbufs(struct drm_device *dev, void *data,
unsigned long token = dev->agp_buffer_token;
if (!map) {
+ DRM_DEBUG("No map\n");
retcode = -EINVAL;
goto done;
}
down_write(&current->mm->mmap_sem);
+ DRM_DEBUG("%x %d\n", token, map->size);
virtual = do_mmap(file_priv->filp, 0, map->size,
PROT_READ | PROT_WRITE,
MAP_SHARED,
@@ -1555,6 +1558,7 @@ int drm_mapbufs(struct drm_device *dev, void *data,
up_write(&current->mm->mmap_sem);
}
if (virtual > -1024UL) {
+ DRM_DEBUG("mmap failed\n");
/* Real error */
retcode = (signed long)virtual;
goto done;
diff --git a/linux-core/drm_dma.c b/linux-core/drm_dma.c
index f7bff0ac..1e6aeefd 100644
--- a/linux-core/drm_dma.c
+++ b/linux-core/drm_dma.c
@@ -58,6 +58,7 @@ int drm_dma_setup(struct drm_device *dev)
return 0;
}
+EXPORT_SYMBOL(drm_dma_setup);
/**
* Cleanup the DMA resources.
@@ -120,6 +121,7 @@ void drm_dma_takedown(struct drm_device *dev)
drm_free(dev->dma, sizeof(*dev->dma), DRM_MEM_DRIVER);
dev->dma = NULL;
}
+EXPORT_SYMBOL(drm_dma_takedown);
/**
* Free a buffer.
diff --git a/linux-core/drm_drv.c b/linux-core/drm_drv.c
index 2a6bebd7..7c43fd00 100644
--- a/linux-core/drm_drv.c
+++ b/linux-core/drm_drv.c
@@ -250,7 +250,7 @@ int drm_lastclose(struct drm_device * dev)
}
dev->queue_count = 0;
- if (drm_core_check_feature(dev, DRIVER_HAVE_DMA))
+ if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) && !drm_core_check_feature(dev, DRIVER_MODESET))
drm_dma_takedown(dev);
dev->dev_mapping = NULL;
diff --git a/linux-core/drm_fops.c b/linux-core/drm_fops.c
index f45d5e46..7bc73d26 100644
--- a/linux-core/drm_fops.c
+++ b/linux-core/drm_fops.c
@@ -54,10 +54,11 @@ static int drm_setup(struct drm_device * dev)
atomic_set(&dev->ioctl_count, 0);
atomic_set(&dev->vma_count, 0);
- dev->buf_use = 0;
- atomic_set(&dev->buf_alloc, 0);
- if (drm_core_check_feature(dev, DRIVER_HAVE_DMA)) {
+ if (drm_core_check_feature(dev, DRIVER_HAVE_DMA) && !drm_core_check_feature(dev, DRIVER_MODESET)) {
+ dev->buf_use = 0;
+ atomic_set(&dev->buf_alloc, 0);
+
i = drm_dma_setup(dev);
if (i < 0)
return i;
diff --git a/linux-core/drm_memory.c b/linux-core/drm_memory.c
index 4b494f9c..a663e965 100644
--- a/linux-core/drm_memory.c
+++ b/linux-core/drm_memory.c
@@ -188,6 +188,7 @@ void *drm_realloc(void *oldpt, size_t oldsize, size_t size, int area)
}
return pt;
}
+EXPORT_SYMBOL(drm_realloc);
/**
* Allocate pages.
diff --git a/linux-core/radeon_gem.c b/linux-core/radeon_gem.c
index 1ee48514..250e6852 100644
--- a/linux-core/radeon_gem.c
+++ b/linux-core/radeon_gem.c
@@ -29,6 +29,8 @@
static int radeon_gem_ib_init(struct drm_device *dev);
static int radeon_gem_ib_destroy(struct drm_device *dev);
+static int radeon_gem_dma_bufs_init(struct drm_device *dev);
+static void radeon_gem_dma_bufs_destroy(struct drm_device *dev);
int radeon_gem_init_object(struct drm_gem_object *obj)
{
@@ -608,6 +610,7 @@ int radeon_alloc_gart_objects(struct drm_device *dev)
/* init the indirect buffers */
radeon_gem_ib_init(dev);
+ radeon_gem_dma_bufs_init(dev);
return 0;
}
@@ -650,6 +653,7 @@ void radeon_gem_mm_fini(struct drm_device *dev)
{
drm_radeon_private_t *dev_priv = dev->dev_private;
+ radeon_gem_dma_bufs_destroy(dev);
radeon_gem_ib_destroy(dev);
mutex_lock(&dev->struct_mutex);
@@ -878,3 +882,247 @@ free_all:
return -ENOMEM;
}
+#define RADEON_DMA_BUFFER_SIZE (64 * 1024)
+#define RADEON_DMA_BUFFER_COUNT (16)
+
+
+/**
+ * Cleanup after an error on one of the addbufs() functions.
+ *
+ * \param dev DRM device.
+ * \param entry buffer entry where the error occurred.
+ *
+ * Frees any pages and buffers associated with the given entry.
+ */
+static void drm_cleanup_buf_error(struct drm_device * dev,
+ struct drm_buf_entry * entry)
+{
+ int i;
+
+ if (entry->seg_count) {
+ for (i = 0; i < entry->seg_count; i++) {
+ if (entry->seglist[i]) {
+ drm_pci_free(dev, entry->seglist[i]);
+ }
+ }
+ drm_free(entry->seglist,
+ entry->seg_count *
+ sizeof(*entry->seglist), DRM_MEM_SEGS);
+
+ entry->seg_count = 0;
+ }
+
+ if (entry->buf_count) {
+ for (i = 0; i < entry->buf_count; i++) {
+ if (entry->buflist[i].dev_private) {
+ drm_free(entry->buflist[i].dev_private,
+ entry->buflist[i].dev_priv_size,
+ DRM_MEM_BUFS);
+ }
+ }
+ drm_free(entry->buflist,
+ entry->buf_count *
+ sizeof(*entry->buflist), DRM_MEM_BUFS);
+
+ entry->buf_count = 0;
+ }
+}
+
+static int radeon_gem_addbufs(struct drm_device *dev)
+{
+ struct drm_radeon_private *dev_priv = dev->dev_private;
+ struct drm_device_dma *dma = dev->dma;
+ struct drm_buf_entry *entry;
+ struct drm_buf *buf;
+ unsigned long offset;
+ unsigned long agp_offset;
+ int count;
+ int order;
+ int size;
+ int alignment;
+ int page_order;
+ int total;
+ int byte_count;
+ int i;
+ struct drm_buf **temp_buflist;
+
+ if (!dma)
+ return -EINVAL;
+
+ count = RADEON_DMA_BUFFER_COUNT;
+ order = drm_order(RADEON_DMA_BUFFER_SIZE);
+ size = 1 << order;
+
+ alignment = PAGE_ALIGN(size);
+ page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
+ total = PAGE_SIZE << page_order;
+
+ byte_count = 0;
+ agp_offset = dev_priv->mm.dma_bufs.bo->offset;
+
+ DRM_DEBUG("count: %d\n", count);
+ DRM_DEBUG("order: %d\n", order);
+ DRM_DEBUG("size: %d\n", size);
+ DRM_DEBUG("agp_offset: %lu\n", agp_offset);
+ DRM_DEBUG("alignment: %d\n", alignment);
+ DRM_DEBUG("page_order: %d\n", page_order);
+ DRM_DEBUG("total: %d\n", total);
+
+ if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
+ return -EINVAL;
+ if (dev->queue_count)
+ return -EBUSY; /* Not while in use */
+
+ spin_lock(&dev->count_lock);
+ if (dev->buf_use) {
+ spin_unlock(&dev->count_lock);
+ return -EBUSY;
+ }
+ atomic_inc(&dev->buf_alloc);
+ spin_unlock(&dev->count_lock);
+
+ mutex_lock(&dev->struct_mutex);
+ entry = &dma->bufs[order];
+ if (entry->buf_count) {
+ mutex_unlock(&dev->struct_mutex);
+ atomic_dec(&dev->buf_alloc);
+ return -ENOMEM; /* May only call once for each order */
+ }
+
+ if (count < 0 || count > 4096) {
+ mutex_unlock(&dev->struct_mutex);
+ atomic_dec(&dev->buf_alloc);
+ return -EINVAL;
+ }
+
+ entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
+ DRM_MEM_BUFS);
+ if (!entry->buflist) {
+ mutex_unlock(&dev->struct_mutex);
+ atomic_dec(&dev->buf_alloc);
+ return -ENOMEM;
+ }
+ memset(entry->buflist, 0, count * sizeof(*entry->buflist));
+
+ entry->buf_size = size;
+ entry->page_order = page_order;
+
+ offset = 0;
+
+ while (entry->buf_count < count) {
+ buf = &entry->buflist[entry->buf_count];
+ buf->idx = dma->buf_count + entry->buf_count;
+ buf->total = alignment;
+ buf->order = order;
+ buf->used = 0;
+
+ buf->offset = (dma->byte_count + offset);
+ buf->bus_address = dev_priv->gart_vm_start + agp_offset + offset;
+ buf->address = (void *)(agp_offset + offset);
+ buf->next = NULL;
+ buf->waiting = 0;
+ buf->pending = 0;
+ init_waitqueue_head(&buf->dma_wait);
+ buf->file_priv = NULL;
+
+ buf->dev_priv_size = dev->driver->dev_priv_size;
+ buf->dev_private = drm_alloc(buf->dev_priv_size, DRM_MEM_BUFS);
+ if (!buf->dev_private) {
+ /* Set count correctly so we free the proper amount. */
+ entry->buf_count = count;
+ drm_cleanup_buf_error(dev, entry);
+ mutex_unlock(&dev->struct_mutex);
+ atomic_dec(&dev->buf_alloc);
+ return -ENOMEM;
+ }
+
+ memset(buf->dev_private, 0, buf->dev_priv_size);
+
+ DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address);
+
+ offset += alignment;
+ entry->buf_count++;
+ byte_count += PAGE_SIZE << page_order;
+ }
+
+ DRM_DEBUG("byte_count: %d\n", byte_count);
+
+ temp_buflist = drm_realloc(dma->buflist,
+ dma->buf_count * sizeof(*dma->buflist),
+ (dma->buf_count + entry->buf_count)
+ * sizeof(*dma->buflist), DRM_MEM_BUFS);
+ if (!temp_buflist) {
+ /* Free the entry because it isn't valid */
+ drm_cleanup_buf_error(dev, entry);
+ mutex_unlock(&dev->struct_mutex);
+ atomic_dec(&dev->buf_alloc);
+ return -ENOMEM;
+ }
+ dma->buflist = temp_buflist;
+
+ for (i = 0; i < entry->buf_count; i++) {
+ dma->buflist[i + dma->buf_count] = &entry->buflist[i];
+ }
+
+ dma->buf_count += entry->buf_count;
+ dma->seg_count += entry->seg_count;
+ dma->page_count += byte_count >> PAGE_SHIFT;
+ dma->byte_count += byte_count;
+
+ DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count);
+ DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count);
+
+ mutex_unlock(&dev->struct_mutex);
+
+ dma->flags = _DRM_DMA_USE_SG;
+ atomic_dec(&dev->buf_alloc);
+ return 0;
+}
+
+static int radeon_gem_dma_bufs_init(struct drm_device *dev)
+{
+ struct drm_radeon_private *dev_priv = dev->dev_private;
+ int size = RADEON_DMA_BUFFER_SIZE * RADEON_DMA_BUFFER_COUNT;
+ int ret;
+
+ ret = drm_dma_setup(dev);
+ if (ret < 0)
+ return ret;
+
+ ret = drm_buffer_object_create(dev, size, drm_bo_type_device,
+ DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE | DRM_BO_FLAG_NO_EVICT |
+ DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_MAPPABLE, 0,
+ 0, 0, &dev_priv->mm.dma_bufs.bo);
+ if (ret) {
+ DRM_ERROR("Failed to create DMA bufs\n");
+ return -ENOMEM;
+ }
+
+ ret = drm_bo_kmap(dev_priv->mm.dma_bufs.bo, 0, size >> PAGE_SHIFT,
+ &dev_priv->mm.dma_bufs.kmap);
+ if (ret) {
+ DRM_ERROR("Failed to mmap DMA buffers\n");
+ return -ENOMEM;
+ }
+ DRM_DEBUG("\n");
+ radeon_gem_addbufs(dev);
+
+ DRM_DEBUG("%x %d\n", dev_priv->mm.dma_bufs.bo->map_list.hash.key, size);
+ dev->agp_buffer_token = dev_priv->mm.dma_bufs.bo->map_list.hash.key << PAGE_SHIFT;
+ dev_priv->mm.fake_agp_map.handle = dev_priv->mm.dma_bufs.kmap.virtual;
+ dev_priv->mm.fake_agp_map.size = size;
+
+ dev->agp_buffer_map = &dev_priv->mm.fake_agp_map;
+
+ return 0;
+}
+
+static void radeon_gem_dma_bufs_destroy(struct drm_device *dev)
+{
+
+ struct drm_radeon_private *dev_priv = dev->dev_private;
+ drm_dma_takedown(dev);
+
+ drm_bo_kunmap(&dev_priv->mm.dma_bufs.kmap);
+ drm_bo_usage_deref_unlocked(&dev_priv->mm.dma_bufs.bo);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-28 19:23:17 +0000