struct vsp1_dl_header *header;
dma_addr_t dma;
- struct vsp1_dl_body body0;
+ struct vsp1_dl_body *body0;
struct list_head bodies;
bool has_chain;
* @mode: display list operation mode (header or headerless)
* @singleshot: execute the display list in single-shot mode
* @vsp1: the VSP1 device
- * @lock: protects the free, active, queued, pending and gc_bodies lists
+ * @lock: protects the free, active, queued, and pending lists
* @free: array of all free display lists
* @active: list currently being processed (loaded) by hardware
* @queued: list queued to the hardware (written to the DL registers)
* @pending: list waiting to be queued to the hardware
* @pool: body pool for the display list bodies
- * @gc_work: bodies garbage collector work struct
- * @gc_bodies: array of display list bodies waiting to be freed
*/
struct vsp1_dl_manager {
unsigned int index;
struct vsp1_dl_list *pending;
struct vsp1_dl_body_pool *pool;
-
- struct work_struct gc_work;
- struct list_head gc_bodies;
};
/* -----------------------------------------------------------------------------
spin_unlock_irqrestore(&dlb->pool->lock, flags);
}
-/*
- * 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->max_entries = num_entries;
-
- dlb->entries = dma_alloc_wc(vsp1->bus_master, dlb->size, &dlb->dma,
- GFP_KERNEL);
- if (!dlb->entries)
- return -ENOMEM;
-
- return 0;
-}
-
-/*
- * Cleanup a display list body and free allocated DMA memory allocated.
- */
-static void vsp1_dl_body_cleanup(struct vsp1_dl_body *dlb)
-{
- dma_free_wc(dlb->vsp1->bus_master, dlb->size, dlb->entries, dlb->dma);
-}
-
-/**
- * vsp1_dl_body_alloc - Allocate a display list body
- * @vsp1: The VSP1 device
- * @num_entries: The maximum number of entries that the body can contain
- *
- * Allocate a display list body with enough memory to contain the requested
- * number of entries.
- *
- * Return a pointer to a body on success or NULL if memory can't be allocated.
- */
-struct vsp1_dl_body *vsp1_dl_body_alloc(struct vsp1_device *vsp1,
- unsigned int num_entries)
-{
- struct vsp1_dl_body *dlb;
- int ret;
-
- dlb = kzalloc(sizeof(*dlb), GFP_KERNEL);
- if (!dlb)
- return NULL;
-
- ret = vsp1_dl_body_init(vsp1, dlb, num_entries, 0);
- if (ret < 0) {
- kfree(dlb);
- return NULL;
- }
-
- return dlb;
-}
-
-/**
- * vsp1_dl_body_free - Free a display list body
- * @dlb: The body
- *
- * Free the given display list body and the associated DMA memory.
- *
- * Bodies must only be freed explicitly if they are not added to a display
- * list, as the display list will take ownership of them and free them
- * otherwise. Manual free typically happens at cleanup time for bodies that
- * have been allocated but not used.
- *
- * Passing a NULL pointer to this function is safe, in that case no operation
- * will be performed.
- */
-void vsp1_dl_body_free(struct vsp1_dl_body *dlb)
-{
- if (!dlb)
- return;
-
- vsp1_dl_body_cleanup(dlb);
- kfree(dlb);
-}
-
/**
* vsp1_dl_body_write - Write a register to a display list body
* @dlb: The body
static struct vsp1_dl_list *vsp1_dl_list_alloc(struct vsp1_dl_manager *dlm)
{
struct vsp1_dl_list *dl;
- size_t header_size;
- int ret;
dl = kzalloc(sizeof(*dl), GFP_KERNEL);
if (!dl)
INIT_LIST_HEAD(&dl->bodies);
dl->dlm = dlm;
- /*
- * Initialize the display list body and allocate DMA memory for the body
- * and the optional header. Both are allocated together to avoid memory
- * fragmentation, with the header located right after the body in
- * memory.
- */
- header_size = dlm->mode == VSP1_DL_MODE_HEADER
- ? ALIGN(sizeof(struct vsp1_dl_header), 8)
- : 0;
-
- ret = vsp1_dl_body_init(dlm->vsp1, &dl->body0, VSP1_DL_NUM_ENTRIES,
- header_size);
- if (ret < 0) {
- kfree(dl);
+ /* Get a default body for our list. */
+ dl->body0 = vsp1_dl_body_get(dlm->pool);
+ if (!dl->body0)
return NULL;
- }
-
if (dlm->mode == VSP1_DL_MODE_HEADER) {
- size_t header_offset = VSP1_DL_NUM_ENTRIES
- * sizeof(*dl->body0.entries);
+ size_t header_offset = dl->body0->max_entries
+ * sizeof(*dl->body0->entries);
- dl->header = ((void *)dl->body0.entries) + header_offset;
- dl->dma = dl->body0.dma + header_offset;
+ dl->header = ((void *)dl->body0->entries) + header_offset;
+ dl->dma = dl->body0->dma + header_offset;
memset(dl->header, 0, sizeof(*dl->header));
- dl->header->lists[0].addr = dl->body0.dma;
+ dl->header->lists[0].addr = dl->body0->dma;
}
return dl;
}
+static void vsp1_dl_list_bodies_put(struct vsp1_dl_list *dl)
+{
+ struct vsp1_dl_body *dlb, *tmp;
+
+ list_for_each_entry_safe(dlb, tmp, &dl->bodies, list) {
+ list_del(&dlb->list);
+ vsp1_dl_body_put(dlb);
+ }
+}
+
static void vsp1_dl_list_free(struct vsp1_dl_list *dl)
{
- vsp1_dl_body_cleanup(&dl->body0);
- list_splice_init(&dl->bodies, &dl->dlm->gc_bodies);
+ vsp1_dl_body_put(dl->body0);
+ vsp1_dl_list_bodies_put(dl);
+
kfree(dl);
}
dl->has_chain = false;
+ vsp1_dl_list_bodies_put(dl);
+
/*
- * We can't free bodies here as DMA memory can only be freed in
- * interruptible context. Move all bodies to the display list manager's
- * list of bodies to be freed, they will be garbage-collected by the
- * work queue.
+ * body0 is reused as as an optimisation as presently every display list
+ * has at least one body, thus we reinitialise the entries list.
*/
- if (!list_empty(&dl->bodies)) {
- list_splice_init(&dl->bodies, &dl->dlm->gc_bodies);
- schedule_work(&dl->dlm->gc_work);
- }
-
- dl->body0.num_entries = 0;
+ dl->body0->num_entries = 0;
list_add_tail(&dl->list, &dl->dlm->free);
}
*/
void vsp1_dl_list_write(struct vsp1_dl_list *dl, u32 reg, u32 data)
{
- vsp1_dl_body_write(&dl->body0, reg, data);
+ vsp1_dl_body_write(dl->body0, reg, data);
}
/**
* which bodies are added.
*
* Adding a body to a display list passes ownership of the body to the list. The
- * caller must not touch the body after this call, and must not free it
- * explicitly with vsp1_dl_body_free().
+ * caller must not touch the body after this call, and must not release it
+ * explicitly with vsp1_dl_body_put().
*
* Additional bodies are only usable for display lists in header mode.
* Attempting to add a body to a header-less display list will return an error.
* list was allocated.
*/
- hdr->num_bytes = dl->body0.num_entries
+ hdr->num_bytes = dl->body0->num_entries
* sizeof(*dl->header->lists);
list_for_each_entry(dlb, &dl->bodies, list) {
* bit will be cleared by the hardware when the display list
* processing starts.
*/
- vsp1_write(vsp1, VI6_DL_HDR_ADDR(0), dl->body0.dma);
+ vsp1_write(vsp1, VI6_DL_HDR_ADDR(0), dl->body0->dma);
vsp1_write(vsp1, VI6_DL_BODY_SIZE, VI6_DL_BODY_SIZE_UPD |
- (dl->body0.num_entries * sizeof(*dl->header->lists)));
+ (dl->body0->num_entries * sizeof(*dl->header->lists)));
} else {
/*
* In header mode, program the display list header address. If
dlm->pending = NULL;
}
-/*
- * Free all bodies awaiting to be garbage-collected.
- *
- * This function must be called without the display list manager lock held.
- */
-static void vsp1_dlm_bodies_free(struct vsp1_dl_manager *dlm)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&dlm->lock, flags);
-
- while (!list_empty(&dlm->gc_bodies)) {
- struct vsp1_dl_body *dlb;
-
- dlb = list_first_entry(&dlm->gc_bodies, struct vsp1_dl_body,
- list);
- list_del(&dlb->list);
-
- spin_unlock_irqrestore(&dlm->lock, flags);
- vsp1_dl_body_free(dlb);
- spin_lock_irqsave(&dlm->lock, flags);
- }
-
- spin_unlock_irqrestore(&dlm->lock, flags);
-}
-
-static void vsp1_dlm_garbage_collect(struct work_struct *work)
-{
- struct vsp1_dl_manager *dlm =
- container_of(work, struct vsp1_dl_manager, gc_work);
-
- vsp1_dlm_bodies_free(dlm);
-}
-
struct vsp1_dl_manager *vsp1_dlm_create(struct vsp1_device *vsp1,
unsigned int index,
unsigned int prealloc)
{
struct vsp1_dl_manager *dlm;
+ size_t header_size;
unsigned int i;
dlm = devm_kzalloc(vsp1->dev, sizeof(*dlm), GFP_KERNEL);
spin_lock_init(&dlm->lock);
INIT_LIST_HEAD(&dlm->free);
- INIT_LIST_HEAD(&dlm->gc_bodies);
- INIT_WORK(&dlm->gc_work, vsp1_dlm_garbage_collect);
+
+ /*
+ * Initialize the display list body and allocate DMA memory for the body
+ * and the optional header. Both are allocated together to avoid memory
+ * fragmentation, with the header located right after the body in
+ * memory.
+ */
+ header_size = dlm->mode == VSP1_DL_MODE_HEADER
+ ? ALIGN(sizeof(struct vsp1_dl_header), 8)
+ : 0;
+
+ dlm->pool = vsp1_dl_body_pool_create(vsp1, prealloc,
+ VSP1_DL_NUM_ENTRIES, header_size);
+ if (!dlm->pool)
+ return NULL;
for (i = 0; i < prealloc; ++i) {
struct vsp1_dl_list *dl;
if (!dlm)
return;
- cancel_work_sync(&dlm->gc_work);
-
list_for_each_entry_safe(dl, next, &dlm->free, list) {
list_del(&dl->list);
vsp1_dl_list_free(dl);
}
- vsp1_dlm_bodies_free(dlm);
+ vsp1_dl_body_pool_destroy(dlm->pool);
}
projects / openwrt / staging / blogic.git / commitdiff