diff options
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/android/ion/ion.c | 37 | ||||
| -rw-r--r-- | drivers/staging/android/ion/ion.h | 51 |
2 files changed, 47 insertions, 41 deletions
diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c index 8cc0489..c775e4f 100644 --- a/drivers/staging/android/ion/ion.c +++ b/drivers/staging/android/ion/ion.c @@ -1,4 +1,5 @@ /* + * drivers/staging/android/ion/ion.c * * Copyright (C) 2011 Google, Inc. @@ -62,7 +63,7 @@ struct ion_device { * @dev: backpointer to ion device * @handles: an rb tree of all the handles in this client * @lock: lock protecting the tree of handles - * @heap_mask: mask of all supported heaps + * @heap_type_mask: mask of all supported heap types * @name: used for debugging * @task: used for debugging * @@ -75,7 +76,7 @@ struct ion_client { struct ion_device *dev; struct rb_root handles; struct mutex lock; - unsigned int heap_mask; + unsigned int heap_type_mask; const char *name; struct task_struct *task; pid_t pid; @@ -386,7 +387,7 @@ static void ion_handle_add(struct ion_client *client, struct ion_handle *handle) } struct ion_handle *ion_alloc(struct ion_client *client, size_t len, - size_t align, unsigned int heap_mask, + size_t align, unsigned int heap_id_mask, unsigned int flags) { struct ion_handle *handle; @@ -394,8 +395,8 @@ struct ion_handle *ion_alloc(struct ion_client *client, size_t len, struct ion_buffer *buffer = NULL; struct ion_heap *heap; - pr_debug("%s: len %d align %d heap_mask %u flags %x\n", __func__, len, - align, heap_mask, flags); + pr_debug("%s: len %d align %d heap_id_mask %u flags %x\n", __func__, + len, align, heap_id_mask, flags); /* * traverse the list of heaps available in this system in priority * order. If the heap type is supported by the client, and matches the @@ -410,10 +411,10 @@ struct ion_handle *ion_alloc(struct ion_client *client, size_t len, down_read(&dev->lock); plist_for_each_entry(heap, &dev->heaps, node) { /* if the client doesn't support this heap type */ - if (!((1 << heap->type) & client->heap_mask)) + if (!((1 << heap->type) & client->heap_type_mask)) continue; - /* if the caller didn't specify this heap type */ - if (!((1 << heap->id) & heap_mask)) + /* if the caller didn't specify this heap id */ + if (!((1 << heap->id) & heap_id_mask)) continue; buffer = ion_buffer_create(heap, dev, len, align, flags); if (!IS_ERR_OR_NULL(buffer)) @@ -588,24 +589,24 @@ static int ion_debug_client_show(struct seq_file *s, void *unused) { struct ion_client *client = s->private; struct rb_node *n; - size_t sizes[ION_NUM_HEAPS] = {0}; - const char *names[ION_NUM_HEAPS] = {0}; + size_t sizes[ION_NUM_HEAP_IDS] = {0}; + const char *names[ION_NUM_HEAP_IDS] = {0}; int i; mutex_lock(&client->lock); for (n = rb_first(&client->handles); n; n = rb_next(n)) { struct ion_handle *handle = rb_entry(n, struct ion_handle, node); - enum ion_heap_type type = handle->buffer->heap->type; + unsigned int id = handle->buffer->heap->id; - if (!names[type]) - names[type] = handle->buffer->heap->name; - sizes[type] += handle->buffer->size; + if (!names[id]) + names[id] = handle->buffer->heap->name; + sizes[id] += handle->buffer->size; } mutex_unlock(&client->lock); seq_printf(s, "%16.16s: %16.16s\n", "heap_name", "size_in_bytes"); - for (i = 0; i < ION_NUM_HEAPS; i++) { + for (i = 0; i < ION_NUM_HEAP_IDS; i++) { if (!names[i]) continue; seq_printf(s, "%16.16s: %16u\n", names[i], sizes[i]); @@ -626,7 +627,7 @@ static const struct file_operations debug_client_fops = { }; struct ion_client *ion_client_create(struct ion_device *dev, - unsigned int heap_mask, + unsigned int heap_type_mask, const char *name) { struct ion_client *client; @@ -661,7 +662,7 @@ struct ion_client *ion_client_create(struct ion_device *dev, client->handles = RB_ROOT; mutex_init(&client->lock); client->name = name; - client->heap_mask = heap_mask; + client->heap_type_mask = heap_type_mask; client->task = task; client->pid = pid; @@ -1057,7 +1058,7 @@ static long ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) if (copy_from_user(&data, (void __user *)arg, sizeof(data))) return -EFAULT; data.handle = ion_alloc(client, data.len, data.align, - data.heap_mask, data.flags); + data.heap_id_mask, data.flags); if (IS_ERR(data.handle)) return PTR_ERR(data.handle); diff --git a/drivers/staging/android/ion/ion.h b/drivers/staging/android/ion/ion.h index e5f679f..a315858 100644 --- a/drivers/staging/android/ion/ion.h +++ b/drivers/staging/android/ion/ion.h @@ -43,6 +43,8 @@ enum ion_heap_type { #define ION_HEAP_SYSTEM_CONTIG_MASK (1 << ION_HEAP_TYPE_SYSTEM_CONTIG) #define ION_HEAP_CARVEOUT_MASK (1 << ION_HEAP_TYPE_CARVEOUT) +#define ION_NUM_HEAP_IDS sizeof(unsigned int) * 8 + /** * heap flags - the lower 16 bits are used by core ion, the upper 16 * bits are reserved for use by the heaps themselves. @@ -71,8 +73,9 @@ struct ion_buffer; /** * struct ion_platform_heap - defines a heap in the given platform * @type: type of the heap from ion_heap_type enum - * @id: unique identifier for heap. When allocating (lower numbers - * will be allocated from first) + * @id: unique identifier for heap. When allocating higher numbers + * will be allocated from first. At allocation these are passed + * as a bit mask and therefore can not exceed ION_NUM_HEAP_IDS. * @name: used for debug purposes * @base: base address of heap in physical memory if applicable * @size: size of the heap in bytes if applicable @@ -116,12 +119,13 @@ void ion_reserve(struct ion_platform_data *data); /** * ion_client_create() - allocate a client and returns it - * @dev: the global ion device - * @heap_mask: mask of heaps this client can allocate from - * @name: used for debugging + * @dev: the global ion device + * @heap_type_mask: mask of heaps this client can allocate from + * @name: used for debugging */ struct ion_client *ion_client_create(struct ion_device *dev, - unsigned int heap_mask, const char *name); + unsigned int heap_type_mask, + const char *name); /** * ion_client_destroy() - free's a client and all it's handles @@ -134,21 +138,22 @@ void ion_client_destroy(struct ion_client *client); /** * ion_alloc - allocate ion memory - * @client: the client - * @len: size of the allocation - * @align: requested allocation alignment, lots of hardware blocks have - * alignment requirements of some kind - * @heap_mask: mask of heaps to allocate from, if multiple bits are set - * heaps will be tried in order from lowest to highest order bit - * @flags: heap flags, the low 16 bits are consumed by ion, the high 16 - * bits are passed on to the respective heap and can be heap - * custom + * @client: the client + * @len: size of the allocation + * @align: requested allocation alignment, lots of hardware blocks + * have alignment requirements of some kind + * @heap_id_mask: mask of heaps to allocate from, if multiple bits are set + * heaps will be tried in order from highest to lowest + * id + * @flags: heap flags, the low 16 bits are consumed by ion, the + * high 16 bits are passed on to the respective heap and + * can be heap custom * * Allocate memory in one of the heaps provided in heap mask and return * an opaque handle to it. */ struct ion_handle *ion_alloc(struct ion_client *client, size_t len, - size_t align, unsigned int heap_mask, + size_t align, unsigned int heap_id_mask, unsigned int flags); /** @@ -237,19 +242,19 @@ struct ion_handle *ion_import_dma_buf(struct ion_client *client, int fd); /** * struct ion_allocation_data - metadata passed from userspace for allocations - * @len: size of the allocation - * @align: required alignment of the allocation - * @heap_mask: mask of heaps to allocate from - * @flags: flags passed to heap - * @handle: pointer that will be populated with a cookie to use to refer - * to this allocation + * @len: size of the allocation + * @align: required alignment of the allocation + * @heap_id_mask: mask of heap ids to allocate from + * @flags: flags passed to heap + * @handle: pointer that will be populated with a cookie to use to + * refer to this allocation * * Provided by userspace as an argument to the ioctl */ struct ion_allocation_data { size_t len; size_t align; - unsigned int heap_mask; + unsigned int heap_id_mask; unsigned int flags; struct ion_handle *handle; }; |