diff options
Diffstat (limited to 'drivers/crypto/marvell/cesa.h')
| -rw-r--r-- | drivers/crypto/marvell/cesa.h | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/drivers/crypto/marvell/cesa.h b/drivers/crypto/marvell/cesa.h index d7493351f14b..8d600682ca47 100644 --- a/drivers/crypto/marvell/cesa.h +++ b/drivers/crypto/marvell/cesa.h @@ -400,7 +400,6 @@ struct mv_cesa_dev_dma { * @regs: device registers * @sram_size: usable SRAM size * @lock: device lock - * @queue: crypto request queue * @engines: array of engines * @dma: dma pools * @@ -412,7 +411,6 @@ struct mv_cesa_dev { struct device *dev; unsigned int sram_size; spinlock_t lock; - struct crypto_queue queue; struct mv_cesa_engine *engines; struct mv_cesa_dev_dma *dma; }; @@ -431,6 +429,8 @@ struct mv_cesa_dev { * @int_mask: interrupt mask cache * @pool: memory pool pointing to the memory region reserved in * SRAM + * @queue: fifo of the pending crypto requests + * @load: engine load counter, useful for load balancing * * Structure storing CESA engine information. */ @@ -446,11 +446,12 @@ struct mv_cesa_engine { size_t max_req_len; u32 int_mask; struct gen_pool *pool; + struct crypto_queue queue; + atomic_t load; }; /** * struct mv_cesa_req_ops - CESA request operations - * @prepare: prepare a request to be executed on the specified engine * @process: process a request chunk result (should return 0 if the * operation, -EINPROGRESS if it needs more steps or an error * code) @@ -460,8 +461,6 @@ struct mv_cesa_engine { * needed. */ struct mv_cesa_req_ops { - void (*prepare)(struct crypto_async_request *req, - struct mv_cesa_engine *engine); int (*process)(struct crypto_async_request *req, u32 status); void (*step)(struct crypto_async_request *req); void (*cleanup)(struct crypto_async_request *req); @@ -690,6 +689,26 @@ static inline bool mv_cesa_mac_op_is_first_frag(const struct mv_cesa_op_ctx *op) int mv_cesa_queue_req(struct crypto_async_request *req, struct mv_cesa_req *creq); +static inline struct mv_cesa_engine *mv_cesa_select_engine(int weight) +{ + int i; + u32 min_load = U32_MAX; + struct mv_cesa_engine *selected = NULL; + + for (i = 0; i < cesa_dev->caps->nengines; i++) { + struct mv_cesa_engine *engine = cesa_dev->engines + i; + u32 load = atomic_read(&engine->load); + if (load < min_load) { + min_load = load; + selected = engine; + } + } + + atomic_add(weight, &selected->load); + + return selected; +} + /* * Helper function that indicates whether a crypto request needs to be * cleaned up or not after being enqueued using mv_cesa_queue_req(). |