} __attribute__((__packed__));
struct vsp1_dl_list {
- size_t size;
- int reg_count;
+ struct list_head list;
- bool in_use;
+ struct vsp1_dl_manager *dlm;
struct vsp1_dl_entry *body;
dma_addr_t dma;
-};
-
-/**
- * struct vsp1_dl - Display List manager
- * @vsp1: the VSP1 device
- * @lock: protects the active, queued and pending lists
- * @lists.all: array of all allocate display lists
- * @lists.active: list currently being processed (loaded) by hardware
- * @lists.queued: list queued to the hardware (written to the DL registers)
- * @lists.pending: list waiting to be queued to the hardware
- * @lists.write: list being written to by software
- */
-struct vsp1_dl {
- struct vsp1_device *vsp1;
-
- spinlock_t lock;
-
size_t size;
- dma_addr_t dma;
- void *mem;
- struct {
- struct vsp1_dl_list all[VSP1_DL_NUM_LISTS];
-
- struct vsp1_dl_list *active;
- struct vsp1_dl_list *queued;
- struct vsp1_dl_list *pending;
- struct vsp1_dl_list *write;
- } lists;
+ int reg_count;
};
/* -----------------------------------------------------------------------------
* Display List Transaction Management
*/
-static void vsp1_dl_free_list(struct vsp1_dl_list *list)
+static struct vsp1_dl_list *vsp1_dl_list_alloc(struct vsp1_dl_manager *dlm)
{
- if (!list)
- return;
+ struct vsp1_dl_list *dl;
- list->in_use = false;
-}
+ dl = kzalloc(sizeof(*dl), GFP_KERNEL);
+ if (!dl)
+ return NULL;
-void vsp1_dl_reset(struct vsp1_dl *dl)
-{
- unsigned int i;
+ dl->dlm = dlm;
+ dl->size = VSP1_DL_BODY_SIZE;
+
+ dl->body = dma_alloc_wc(dlm->vsp1->dev, dl->size, &dl->dma, GFP_KERNEL);
+ if (!dl->body) {
+ kfree(dl);
+ return NULL;
+ }
- dl->lists.active = NULL;
- dl->lists.queued = NULL;
- dl->lists.pending = NULL;
- dl->lists.write = NULL;
+ return dl;
+}
- for (i = 0; i < ARRAY_SIZE(dl->lists.all); ++i)
- dl->lists.all[i].in_use = false;
+static void vsp1_dl_list_free(struct vsp1_dl_list *dl)
+{
+ dma_free_wc(dl->dlm->vsp1->dev, dl->size, dl->body, dl->dma);
+ kfree(dl);
}
-void vsp1_dl_begin(struct vsp1_dl *dl)
+/**
+ * vsp1_dl_list_get - Get a free display list
+ * @dlm: The display list manager
+ *
+ * Get a display list from the pool of free lists and return it.
+ *
+ * This function must be called without the display list manager lock held.
+ */
+struct vsp1_dl_list *vsp1_dl_list_get(struct vsp1_dl_manager *dlm)
{
- struct vsp1_dl_list *list = NULL;
+ struct vsp1_dl_list *dl = NULL;
unsigned long flags;
- unsigned int i;
- spin_lock_irqsave(&dl->lock, flags);
+ spin_lock_irqsave(&dlm->lock, flags);
- for (i = 0; i < ARRAY_SIZE(dl->lists.all); ++i) {
- if (!dl->lists.all[i].in_use) {
- list = &dl->lists.all[i];
- break;
- }
+ if (!list_empty(&dlm->free)) {
+ dl = list_first_entry(&dlm->free, struct vsp1_dl_list, list);
+ list_del(&dl->list);
}
- if (!list) {
- list = dl->lists.pending;
- dl->lists.pending = NULL;
- }
+ spin_unlock_irqrestore(&dlm->lock, flags);
+
+ return dl;
+}
- spin_unlock_irqrestore(&dl->lock, flags);
+/**
+ * vsp1_dl_list_put - Release a display list
+ * @dl: The display list
+ *
+ * Release the display list and return it to the pool of free lists.
+ *
+ * This function must be called with the display list manager lock held.
+ *
+ * Passing a NULL pointer to this function is safe, in that case no operation
+ * will be performed.
+ */
+void vsp1_dl_list_put(struct vsp1_dl_list *dl)
+{
+ if (!dl)
+ return;
- dl->lists.write = list;
+ dl->reg_count = 0;
- list->in_use = true;
- list->reg_count = 0;
+ list_add_tail(&dl->list, &dl->dlm->free);
}
-void vsp1_dl_add(struct vsp1_dl *dl, u32 reg, u32 data)
+void vsp1_dl_list_write(struct vsp1_dl_list *dl, u32 reg, u32 data)
{
- struct vsp1_dl_list *list = dl->lists.write;
-
- list->body[list->reg_count].addr = reg;
- list->body[list->reg_count].data = data;
- list->reg_count++;
+ dl->body[dl->reg_count].addr = reg;
+ dl->body[dl->reg_count].data = data;
+ dl->reg_count++;
}
-void vsp1_dl_commit(struct vsp1_dl *dl)
+void vsp1_dl_list_commit(struct vsp1_dl_list *dl)
{
- struct vsp1_device *vsp1 = dl->vsp1;
- struct vsp1_dl_list *list;
+ struct vsp1_dl_manager *dlm = dl->dlm;
+ struct vsp1_device *vsp1 = dlm->vsp1;
unsigned long flags;
bool update;
- list = dl->lists.write;
- dl->lists.write = NULL;
-
- spin_lock_irqsave(&dl->lock, flags);
+ spin_lock_irqsave(&dlm->lock, flags);
/* Once the UPD bit has been set the hardware can start processing the
* display list at any time and we can't touch the address and size
*/
update = !!(vsp1_read(vsp1, VI6_DL_BODY_SIZE) & VI6_DL_BODY_SIZE_UPD);
if (update) {
- vsp1_dl_free_list(dl->lists.pending);
- dl->lists.pending = list;
+ vsp1_dl_list_put(dlm->pending);
+ dlm->pending = dl;
goto done;
}
* The UPD bit will be cleared by the device when the display list is
* processed.
*/
- vsp1_write(vsp1, VI6_DL_HDR_ADDR(0), list->dma);
+ vsp1_write(vsp1, VI6_DL_HDR_ADDR(0), dl->dma);
vsp1_write(vsp1, VI6_DL_BODY_SIZE, VI6_DL_BODY_SIZE_UPD |
- (list->reg_count * 8));
+ (dl->reg_count * 8));
- vsp1_dl_free_list(dl->lists.queued);
- dl->lists.queued = list;
+ vsp1_dl_list_put(dlm->queued);
+ dlm->queued = dl;
done:
- spin_unlock_irqrestore(&dl->lock, flags);
+ spin_unlock_irqrestore(&dlm->lock, flags);
}
/* -----------------------------------------------------------------------------
- * Interrupt Handling
+ * Display List Manager
*/
-void vsp1_dl_irq_display_start(struct vsp1_dl *dl)
+/* Interrupt Handling */
+void vsp1_dlm_irq_display_start(struct vsp1_dl_manager *dlm)
{
- spin_lock(&dl->lock);
+ spin_lock(&dlm->lock);
/* The display start interrupt signals the end of the display list
* processing by the device. The active display list, if any, won't be
* accessed anymore and can be reused.
*/
- if (dl->lists.active) {
- vsp1_dl_free_list(dl->lists.active);
- dl->lists.active = NULL;
- }
+ vsp1_dl_list_put(dlm->active);
+ dlm->active = NULL;
- spin_unlock(&dl->lock);
+ spin_unlock(&dlm->lock);
}
-void vsp1_dl_irq_frame_end(struct vsp1_dl *dl)
+void vsp1_dlm_irq_frame_end(struct vsp1_dl_manager *dlm)
{
- struct vsp1_device *vsp1 = dl->vsp1;
+ struct vsp1_device *vsp1 = dlm->vsp1;
- spin_lock(&dl->lock);
+ spin_lock(&dlm->lock);
+
+ vsp1_dl_list_put(dlm->active);
+ dlm->active = NULL;
/* The UPD bit set indicates that the commit operation raced with the
* interrupt and occurred after the frame end event and UPD clear but
/* The device starts processing the queued display list right after the
* frame end interrupt. The display list thus becomes active.
*/
- if (dl->lists.queued) {
- WARN_ON(dl->lists.active);
- dl->lists.active = dl->lists.queued;
- dl->lists.queued = NULL;
+ if (dlm->queued) {
+ dlm->active = dlm->queued;
+ dlm->queued = NULL;
}
/* Now that the UPD bit has been cleared we can queue the next display
* list to the hardware if one has been prepared.
*/
- if (dl->lists.pending) {
- struct vsp1_dl_list *list = dl->lists.pending;
+ if (dlm->pending) {
+ struct vsp1_dl_list *dl = dlm->pending;
- vsp1_write(vsp1, VI6_DL_HDR_ADDR(0), list->dma);
+ vsp1_write(vsp1, VI6_DL_HDR_ADDR(0), dl->dma);
vsp1_write(vsp1, VI6_DL_BODY_SIZE, VI6_DL_BODY_SIZE_UPD |
- (list->reg_count * 8));
+ (dl->reg_count * 8));
- dl->lists.queued = list;
- dl->lists.pending = NULL;
+ dlm->queued = dl;
+ dlm->pending = NULL;
}
done:
- spin_unlock(&dl->lock);
+ spin_unlock(&dlm->lock);
}
-/* -----------------------------------------------------------------------------
- * Hardware Setup
- */
-
-void vsp1_dl_setup(struct vsp1_device *vsp1)
+/* Hardware Setup */
+void vsp1_dlm_setup(struct vsp1_device *vsp1)
{
u32 ctrl = (256 << VI6_DL_CTRL_AR_WAIT_SHIFT);
vsp1_write(vsp1, VI6_DL_SWAP, VI6_DL_SWAP_LWS);
}
-/* -----------------------------------------------------------------------------
- * Initialization and Cleanup
- */
+void vsp1_dlm_reset(struct vsp1_dl_manager *dlm)
+{
+ vsp1_dl_list_put(dlm->active);
+ vsp1_dl_list_put(dlm->queued);
+ vsp1_dl_list_put(dlm->pending);
+
+ dlm->active = NULL;
+ dlm->queued = NULL;
+ dlm->pending = NULL;
+}
-struct vsp1_dl *vsp1_dl_create(struct vsp1_device *vsp1)
+int vsp1_dlm_init(struct vsp1_device *vsp1, struct vsp1_dl_manager *dlm,
+ unsigned int prealloc)
{
- struct vsp1_dl *dl;
unsigned int i;
- dl = kzalloc(sizeof(*dl), GFP_KERNEL);
- if (!dl)
- return NULL;
-
- spin_lock_init(&dl->lock);
+ dlm->vsp1 = vsp1;
- dl->vsp1 = vsp1;
- dl->size = VSP1_DL_BODY_SIZE * ARRAY_SIZE(dl->lists.all);
+ spin_lock_init(&dlm->lock);
+ INIT_LIST_HEAD(&dlm->free);
- dl->mem = dma_alloc_wc(vsp1->dev, dl->size, &dl->dma,
- GFP_KERNEL);
- if (!dl->mem) {
- kfree(dl);
- return NULL;
- }
+ for (i = 0; i < prealloc; ++i) {
+ struct vsp1_dl_list *dl;
- for (i = 0; i < ARRAY_SIZE(dl->lists.all); ++i) {
- struct vsp1_dl_list *list = &dl->lists.all[i];
+ dl = vsp1_dl_list_alloc(dlm);
+ if (!dl)
+ return -ENOMEM;
- list->size = VSP1_DL_BODY_SIZE;
- list->reg_count = 0;
- list->in_use = false;
- list->dma = dl->dma + VSP1_DL_BODY_SIZE * i;
- list->body = dl->mem + VSP1_DL_BODY_SIZE * i;
+ list_add_tail(&dl->list, &dlm->free);
}
- return dl;
+ return 0;
}
-void vsp1_dl_destroy(struct vsp1_dl *dl)
+void vsp1_dlm_cleanup(struct vsp1_dl_manager *dlm)
{
- dma_free_wc(dl->vsp1->dev, dl->size, dl->mem, dl->dma);
- kfree(dl);
+ struct vsp1_dl_list *dl, *next;
+
+ list_for_each_entry_safe(dl, next, &dlm->free, list) {
+ list_del(&dl->list);
+ vsp1_dl_list_free(dl);
+ }
}
projects / deliverable / linux.git / commitdiff
