diff options
Diffstat (limited to 'drivers/crypto/caam/qi.h')
| -rw-r--r-- | drivers/crypto/caam/qi.h | 46 |
1 files changed, 14 insertions, 32 deletions
diff --git a/drivers/crypto/caam/qi.h b/drivers/crypto/caam/qi.h index 33b0433f5f22..a96e3d213c06 100644 --- a/drivers/crypto/caam/qi.h +++ b/drivers/crypto/caam/qi.h @@ -1,43 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0 */ /* * Public definitions for the CAAM/QI (Queue Interface) backend. * * Copyright 2013-2016 Freescale Semiconductor, Inc. - * Copyright 2016-2017 NXP + * Copyright 2016-2017, 2020 NXP */ #ifndef __QI_H__ #define __QI_H__ +#include <crypto/algapi.h> +#include <linux/compiler_attributes.h> #include <soc/fsl/qman.h> #include "compat.h" #include "desc.h" #include "desc_constr.h" -/* - * CAAM hardware constructs a job descriptor which points to a shared descriptor - * (as pointed by context_a of to-CAAM FQ). - * When the job descriptor is executed by DECO, the whole job descriptor - * together with shared descriptor gets loaded in DECO buffer, which is - * 64 words (each 32-bit) long. - * - * The job descriptor constructed by CAAM hardware has the following layout: - * - * HEADER (1 word) - * Shdesc ptr (1 or 2 words) - * SEQ_OUT_PTR (1 word) - * Out ptr (1 or 2 words) - * Out length (1 word) - * SEQ_IN_PTR (1 word) - * In ptr (1 or 2 words) - * In length (1 word) - * - * The shdesc ptr is used to fetch shared descriptor contents into DECO buffer. - * - * Apart from shdesc contents, the total number of words that get loaded in DECO - * buffer are '8' or '11'. The remaining words in DECO buffer can be used for - * storing shared descriptor. - */ -#define MAX_SDLEN ((CAAM_DESC_BYTES_MAX - DESC_JOB_IO_LEN) / CAAM_CMD_SZ) +/* Length of a single buffer in the QI driver memory cache */ +#define CAAM_QI_MEMCACHE_SIZE 768 extern bool caam_congested __read_mostly; @@ -58,7 +38,6 @@ typedef void (*caam_qi_cbk)(struct caam_drv_req *drv_req, u32 status); enum optype { ENCRYPT, DECRYPT, - GIVENCRYPT, NUM_OP }; @@ -75,20 +54,24 @@ enum optype { * @context_a: shared descriptor dma address * @req_fq: to-CAAM request frame queue * @rsp_fq: from-CAAM response frame queue + * @refcnt: reference counter incremented for each frame enqueued in to-CAAM FQ * @cpu: cpu on which to receive CAAM response * @op_type: operation type * @qidev: device pointer for CAAM/QI backend */ struct caam_drv_ctx { - u32 prehdr[2]; - u32 sh_desc[MAX_SDLEN]; + struct { + u32 prehdr[2]; + u32 sh_desc[MAX_SDLEN]; + } __aligned(CRYPTO_DMA_ALIGN); dma_addr_t context_a; struct qman_fq *req_fq; struct qman_fq *rsp_fq; + refcount_t refcnt; int cpu; enum optype op_type; struct device *qidev; -} ____cacheline_aligned; +}; /** * caam_drv_req - The request structure the driver application should fill while @@ -109,7 +92,7 @@ struct caam_drv_req { struct caam_drv_ctx *drv_ctx; caam_qi_cbk cbk; void *app_ctx; -} ____cacheline_aligned; +} __aligned(CRYPTO_DMA_ALIGN); /** * caam_drv_ctx_init - Initialise a CAAM/QI driver context @@ -170,7 +153,6 @@ int caam_drv_ctx_update(struct caam_drv_ctx *drv_ctx, u32 *sh_desc); void caam_drv_ctx_rel(struct caam_drv_ctx *drv_ctx); int caam_qi_init(struct platform_device *pdev); -int caam_qi_shutdown(struct device *dev); /** * qi_cache_alloc - Allocate buffers from CAAM-QI cache |