diff options
Diffstat (limited to 'drivers/staging/android/ion/ion.h')
| -rw-r--r-- | drivers/staging/android/ion/ion.h | 51 |
1 files changed, 28 insertions, 23 deletions
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; }; |