static int tegra_bo_alloc(struct drm_device *drm, struct tegra_bo *bo)
{
struct tegra_drm *tegra = drm->dev_private;
int err;
if (tegra->domain) {
err = tegra_bo_get_pages(drm, bo);
if (err < 0)
return err;
err = tegra_bo_iommu_map(tegra, bo);
if (err < 0) {
tegra_bo_free(drm, bo);
return err;
}
} else {
size_t size = bo->gem.size;
bo->vaddr = dma_alloc_wc(drm->dev, size, &bo->paddr,
GFP_KERNEL | __GFP_NOWARN);
if (!bo->vaddr) {
dev_err(drm->dev,
"failed to allocate buffer of size %zu\n",
size);
return -ENOMEM;
}
}
return 0;
}
/**
* drm_gem_cma_create - allocate an object with the given size
* @drm: DRM device
* @size: size of the object to allocate
*
* This function creates a CMA GEM object and allocates a contiguous chunk of
* memory as backing store. The backing memory has the writecombine attribute
* set.
*
* Returns:
* A struct drm_gem_cma_object * on success or an ERR_PTR()-encoded negative
* error code on failure.
*/
struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
size_t size)
{
struct drm_gem_cma_object *cma_obj;
int ret;
size = round_up(size, PAGE_SIZE);
cma_obj = __drm_gem_cma_create(drm, size);
if (IS_ERR(cma_obj))
return cma_obj;
cma_obj->vaddr = dma_alloc_wc(drm->dev, size, &cma_obj->paddr,
GFP_KERNEL | __GFP_NOWARN);
if (!cma_obj->vaddr) {
dev_err(drm->dev, "failed to allocate buffer with size %zu\n",
size);
ret = -ENOMEM;
goto error;
}
return cma_obj;
error:
drm->driver->gem_free_object(&cma_obj->base);
return ERR_PTR(ret);
}
/**
* vsp1_dl_body_pool_create - Create a pool of bodies from a single allocation
* @vsp1: The VSP1 device
* @num_bodies: The number of bodies to allocate
* @num_entries: The maximum number of entries that a body can contain
* @extra_size: Extra allocation provided for the bodies
*
* Allocate a pool of display list bodies each with enough memory to contain the
* requested number of entries plus the @extra_size.
*
* Return a pointer to a pool on success or NULL if memory can't be allocated.
*/
struct vsp1_dl_body_pool *
vsp1_dl_body_pool_create(struct vsp1_device *vsp1, unsigned int num_bodies,
unsigned int num_entries, size_t extra_size)
{
struct vsp1_dl_body_pool *pool;
size_t dlb_size;
unsigned int i;
pool = kzalloc(sizeof(*pool), GFP_KERNEL);
if (!pool)
return NULL;
pool->vsp1 = vsp1;
/*
* TODO: 'extra_size' is only used by vsp1_dlm_create(), to allocate
* extra memory for the display list header. We need only one header per
* display list, not per display list body, thus this allocation is
* extraneous and should be reworked in the future.
*/
dlb_size = num_entries * sizeof(struct vsp1_dl_entry) + extra_size;
pool->size = dlb_size * num_bodies;
pool->bodies = kcalloc(num_bodies, sizeof(*pool->bodies), GFP_KERNEL);
if (!pool->bodies) {
kfree(pool);
return NULL;
}
pool->mem = dma_alloc_wc(vsp1->bus_master, pool->size, &pool->dma,
GFP_KERNEL);
if (!pool->mem) {
kfree(pool->bodies);
kfree(pool);
return NULL;
}
spin_lock_init(&pool->lock);
INIT_LIST_HEAD(&pool->free);
for (i = 0; i < num_bodies; ++i) {
struct vsp1_dl_body *dlb = &pool->bodies[i];
dlb->pool = pool;
dlb->max_entries = num_entries;
dlb->dma = pool->dma + i * dlb_size;
dlb->entries = pool->mem + i * dlb_size;
list_add_tail(&dlb->free, &pool->free);
}
return pool;
}
/*
* Initialize a display list body object and allocate DMA memory for the body
* data. The display list body object is expected to have been initialized to
* 0 when allocated.
*/
static int vsp1_dl_body_init(struct vsp1_device *vsp1,
struct vsp1_dl_body *dlb, unsigned int num_entries,
size_t extra_size)
{
size_t size = num_entries * sizeof(*dlb->entries) + extra_size;
dlb->vsp1 = vsp1;
dlb->size = size;
dlb->entries = dma_alloc_wc(vsp1->dev, dlb->size, &dlb->dma,
GFP_KERNEL);
if (!dlb->entries)
return -ENOMEM;
return 0;
}
static int omap_pcm_preallocate_dma_buffer(struct snd_pcm *pcm,
int stream)
{
struct snd_pcm_substream *substream = pcm->streams[stream].substream;
struct snd_dma_buffer *buf = &substream->dma_buffer;
size_t size = omap_pcm_hardware.buffer_bytes_max;
buf->dev.type = SNDRV_DMA_TYPE_DEV;
buf->dev.dev = pcm->card->dev;
buf->private_data = NULL;
buf->area = dma_alloc_wc(pcm->card->dev, size, &buf->addr, GFP_KERNEL);
if (!buf->area)
return -ENOMEM;
buf->bytes = size;
return 0;
}
static int lpc32xx_clcd_setup(struct clcd_fb *fb)
{
dma_addr_t dma;
fb->fb.screen_base = dma_alloc_wc(&fb->dev->dev, PANEL_SIZE, &dma,
GFP_KERNEL);
if (!fb->fb.screen_base) {
printk(KERN_ERR "CLCD: unable to map framebuffer\n");
return -ENOMEM;
}
fb->fb.fix.smem_start = dma;
fb->fb.fix.smem_len = PANEL_SIZE;
fb->panel = &conn_lcd_panel;
return 0;
}
/*
* Init push buffer resources
*/
static int host1x_pushbuffer_init(struct push_buffer *pb)
{
struct host1x_cdma *cdma = pb_to_cdma(pb);
struct host1x *host1x = cdma_to_host1x(cdma);
struct iova *alloc;
u32 size;
int err;
pb->mapped = NULL;
pb->phys = 0;
pb->size = HOST1X_PUSHBUFFER_SLOTS * 8;
size = pb->size + 4;
/* initialize buffer pointers */
pb->fence = pb->size - 8;
pb->pos = 0;
if (host1x->domain) {
unsigned long shift;
size = iova_align(&host1x->iova, size);
pb->mapped = dma_alloc_wc(host1x->dev, size, &pb->phys,
GFP_KERNEL);
if (!pb->mapped)
return -ENOMEM;
shift = iova_shift(&host1x->iova);
alloc = alloc_iova(&host1x->iova, size >> shift,
host1x->iova_end >> shift, true);
if (!alloc) {
err = -ENOMEM;
goto iommu_free_mem;
}
pb->dma = iova_dma_addr(&host1x->iova, alloc);
err = iommu_map(host1x->domain, pb->dma, pb->phys, size,
IOMMU_READ);
if (err)
goto iommu_free_iova;
} else {
static void sti_hqvdp_init(struct sti_hqvdp *hqvdp)
{
int size;
dma_addr_t dma_addr;
hqvdp->vtg_nb.notifier_call = sti_hqvdp_vtg_cb;
/* Allocate memory for the VDP commands */
size = NB_VDP_CMD * sizeof(struct sti_hqvdp_cmd);
hqvdp->hqvdp_cmd = dma_alloc_wc(hqvdp->dev, size,
&dma_addr,
GFP_KERNEL | GFP_DMA);
if (!hqvdp->hqvdp_cmd) {
DRM_ERROR("Failed to allocate memory for VDP cmd\n");
return;
}
hqvdp->hqvdp_cmd_paddr = (u32)dma_addr;
memset(hqvdp->hqvdp_cmd, 0, size);
}
/*
* Alloc the SDRAM region of NUC900 for the frame buffer.
* The buffer should be a non-cached, non-buffered, memory region
* to allow palette and pixel writes without flushing the cache.
*/
static int nuc900fb_map_video_memory(struct fb_info *info)
{
struct nuc900fb_info *fbi = info->par;
dma_addr_t map_dma;
unsigned long map_size = PAGE_ALIGN(info->fix.smem_len);
dev_dbg(fbi->dev, "nuc900fb_map_video_memory(fbi=%p) map_size %lu\n",
fbi, map_size);
info->screen_base = dma_alloc_wc(fbi->dev, map_size, &map_dma,
GFP_KERNEL);
if (!info->screen_base)
return -ENOMEM;
memset(info->screen_base, 0x00, map_size);
info->fix.smem_start = map_dma;
return 0;
}
