diff options
Diffstat (limited to 'drivers/dma-buf')
| -rw-r--r-- | drivers/dma-buf/dma-fence-array.c | 78 | ||||
| -rw-r--r-- | drivers/dma-buf/dma-heap.c | 27 |
2 files changed, 72 insertions, 33 deletions
diff --git a/drivers/dma-buf/dma-fence-array.c b/drivers/dma-buf/dma-fence-array.c index c74ac197d5fe..8a08ffde31e7 100644 --- a/drivers/dma-buf/dma-fence-array.c +++ b/drivers/dma-buf/dma-fence-array.c @@ -144,37 +144,38 @@ const struct dma_fence_ops dma_fence_array_ops = { EXPORT_SYMBOL(dma_fence_array_ops); /** - * dma_fence_array_create - Create a custom fence array + * dma_fence_array_alloc - Allocate a custom fence array + * @num_fences: [in] number of fences to add in the array + * + * Return dma fence array on success, NULL on failure + */ +struct dma_fence_array *dma_fence_array_alloc(int num_fences) +{ + struct dma_fence_array *array; + + return kzalloc(struct_size(array, callbacks, num_fences), GFP_KERNEL); +} +EXPORT_SYMBOL(dma_fence_array_alloc); + +/** + * dma_fence_array_init - Init a custom fence array + * @array: [in] dma fence array to arm * @num_fences: [in] number of fences to add in the array * @fences: [in] array containing the fences * @context: [in] fence context to use * @seqno: [in] sequence number to use * @signal_on_any: [in] signal on any fence in the array * - * Allocate a dma_fence_array object and initialize the base fence with - * dma_fence_init(). - * In case of error it returns NULL. - * - * The caller should allocate the fences array with num_fences size - * and fill it with the fences it wants to add to the object. Ownership of this - * array is taken and dma_fence_put() is used on each fence on release. - * - * If @signal_on_any is true the fence array signals if any fence in the array - * signals, otherwise it signals when all fences in the array signal. + * Implementation of @dma_fence_array_create without allocation. Useful to init + * a preallocated dma fence array in the path of reclaim or dma fence signaling. */ -struct dma_fence_array *dma_fence_array_create(int num_fences, - struct dma_fence **fences, - u64 context, unsigned seqno, - bool signal_on_any) +void dma_fence_array_init(struct dma_fence_array *array, + int num_fences, struct dma_fence **fences, + u64 context, unsigned seqno, + bool signal_on_any) { - struct dma_fence_array *array; - WARN_ON(!num_fences || !fences); - array = kzalloc(struct_size(array, callbacks, num_fences), GFP_KERNEL); - if (!array) - return NULL; - array->num_fences = num_fences; spin_lock_init(&array->lock); @@ -200,6 +201,41 @@ struct dma_fence_array *dma_fence_array_create(int num_fences, */ while (num_fences--) WARN_ON(dma_fence_is_container(fences[num_fences])); +} +EXPORT_SYMBOL(dma_fence_array_init); + +/** + * dma_fence_array_create - Create a custom fence array + * @num_fences: [in] number of fences to add in the array + * @fences: [in] array containing the fences + * @context: [in] fence context to use + * @seqno: [in] sequence number to use + * @signal_on_any: [in] signal on any fence in the array + * + * Allocate a dma_fence_array object and initialize the base fence with + * dma_fence_init(). + * In case of error it returns NULL. + * + * The caller should allocate the fences array with num_fences size + * and fill it with the fences it wants to add to the object. Ownership of this + * array is taken and dma_fence_put() is used on each fence on release. + * + * If @signal_on_any is true the fence array signals if any fence in the array + * signals, otherwise it signals when all fences in the array signal. + */ +struct dma_fence_array *dma_fence_array_create(int num_fences, + struct dma_fence **fences, + u64 context, unsigned seqno, + bool signal_on_any) +{ + struct dma_fence_array *array; + + array = dma_fence_array_alloc(num_fences); + if (!array) + return NULL; + + dma_fence_array_init(array, num_fences, fences, + context, seqno, signal_on_any); return array; } diff --git a/drivers/dma-buf/dma-heap.c b/drivers/dma-buf/dma-heap.c index 2298ca5e112e..3cbe87d4a464 100644 --- a/drivers/dma-buf/dma-heap.c +++ b/drivers/dma-buf/dma-heap.c @@ -7,17 +7,15 @@ */ #include <linux/cdev.h> -#include <linux/debugfs.h> #include <linux/device.h> #include <linux/dma-buf.h> +#include <linux/dma-heap.h> #include <linux/err.h> -#include <linux/xarray.h> #include <linux/list.h> -#include <linux/slab.h> #include <linux/nospec.h> -#include <linux/uaccess.h> #include <linux/syscalls.h> -#include <linux/dma-heap.h> +#include <linux/uaccess.h> +#include <linux/xarray.h> #include <uapi/linux/dma-heap.h> #define DEVNAME "dma_heap" @@ -28,9 +26,10 @@ * struct dma_heap - represents a dmabuf heap in the system * @name: used for debugging/device-node name * @ops: ops struct for this heap - * @heap_devt heap device node - * @list list head connecting to list of heaps - * @heap_cdev heap char device + * @priv: private data for this heap + * @heap_devt: heap device node + * @list: list head connecting to list of heaps + * @heap_cdev: heap char device * * Represents a heap of memory from which buffers can be made. */ @@ -193,11 +192,11 @@ static const struct file_operations dma_heap_fops = { }; /** - * dma_heap_get_drvdata() - get per-subdriver data for the heap + * dma_heap_get_drvdata - get per-heap driver data * @heap: DMA-Heap to retrieve private data for * * Returns: - * The per-subdriver data for the heap. + * The per-heap data for the heap. */ void *dma_heap_get_drvdata(struct dma_heap *heap) { @@ -205,8 +204,8 @@ void *dma_heap_get_drvdata(struct dma_heap *heap) } /** - * dma_heap_get_name() - get heap name - * @heap: DMA-Heap to retrieve private data for + * dma_heap_get_name - get heap name + * @heap: DMA-Heap to retrieve the name of * * Returns: * The char* for the heap name. @@ -216,6 +215,10 @@ const char *dma_heap_get_name(struct dma_heap *heap) return heap->name; } +/** + * dma_heap_add - adds a heap to dmabuf heaps + * @exp_info: information needed to register this heap + */ struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info) { struct dma_heap *heap, *h, *err_ret; |