88 static inline void rng_unmap_ctx(struct caam_rng_ctx *ctx)  in rng_unmap_ctx()  argument
90 	struct device *jrdev = ctx->jrdev;  in rng_unmap_ctx()
92 	if (ctx->sh_desc_dma)  in rng_unmap_ctx()
93 		dma_unmap_single(jrdev, ctx->sh_desc_dma,  in rng_unmap_ctx()
94 				 desc_bytes(ctx->sh_desc), DMA_TO_DEVICE);  in rng_unmap_ctx()
95 	rng_unmap_buf(jrdev, &ctx->bufs[0]);  in rng_unmap_ctx()
96 	rng_unmap_buf(jrdev, &ctx->bufs[1]);  in rng_unmap_ctx()
121 static inline int submit_job(struct caam_rng_ctx *ctx, int to_current)  in submit_job()  argument
123 	struct buf_data *bd = &ctx->bufs[!(to_current ^ ctx->current_buf)];  in submit_job()
124 	struct device *jrdev = ctx->jrdev;  in submit_job()
128 	dev_dbg(jrdev, "submitting job %d\n", !(to_current ^ ctx->current_buf));  in submit_job()
130 	err = caam_jr_enqueue(jrdev, desc, rng_done, ctx);  in submit_job()
141 	struct caam_rng_ctx *ctx = rng_ctx;  in caam_read()  local
142 	struct buf_data *bd = &ctx->bufs[ctx->current_buf];  in caam_read()
149 			err = submit_job(ctx, 1);  in caam_read()
163 	next_buf_idx = ctx->cur_buf_idx + max;  in caam_read()
164 	dev_dbg(ctx->jrdev, "%s: start reading at buffer %d, idx %d\n",  in caam_read()
165 		 __func__, ctx->current_buf, ctx->cur_buf_idx);  in caam_read()
169 		memcpy(data, bd->buf + ctx->cur_buf_idx, max);  in caam_read()
170 		ctx->cur_buf_idx = next_buf_idx;  in caam_read()
175 	copied_idx = RN_BUF_SIZE - ctx->cur_buf_idx;  in caam_read()
176 	memcpy(data, bd->buf + ctx->cur_buf_idx, copied_idx);  in caam_read()
177 	ctx->cur_buf_idx = 0;  in caam_read()
181 	submit_job(ctx, 1);  in caam_read()
184 	ctx->current_buf = !ctx->current_buf;  in caam_read()
185 	dev_dbg(ctx->jrdev, "switched to buffer %d\n", ctx->current_buf);  in caam_read()
192 static inline int rng_create_sh_desc(struct caam_rng_ctx *ctx)  in rng_create_sh_desc()  argument
194 	struct device *jrdev = ctx->jrdev;  in rng_create_sh_desc()
195 	u32 *desc = ctx->sh_desc;  in rng_create_sh_desc()
208 	ctx->sh_desc_dma = dma_map_single(jrdev, desc, desc_bytes(desc),  in rng_create_sh_desc()
210 	if (dma_mapping_error(jrdev, ctx->sh_desc_dma)) {  in rng_create_sh_desc()
221 static inline int rng_create_job_desc(struct caam_rng_ctx *ctx, int buf_id)  in rng_create_job_desc()  argument
223 	struct device *jrdev = ctx->jrdev;  in rng_create_job_desc()
224 	struct buf_data *bd = &ctx->bufs[buf_id];  in rng_create_job_desc()
226 	int sh_len = desc_len(ctx->sh_desc);  in rng_create_job_desc()
228 	init_job_desc_shared(desc, ctx->sh_desc_dma, sh_len, HDR_SHARE_DEFER |  in rng_create_job_desc()
259 static int caam_init_buf(struct caam_rng_ctx *ctx, int buf_id)  in caam_init_buf()  argument
261 	struct buf_data *bd = &ctx->bufs[buf_id];  in caam_init_buf()
264 	err = rng_create_job_desc(ctx, buf_id);  in caam_init_buf()
269 	submit_job(ctx, buf_id == ctx->current_buf);  in caam_init_buf()
275 static int caam_init_rng(struct caam_rng_ctx *ctx, struct device *jrdev)  in caam_init_rng()  argument
279 	ctx->jrdev = jrdev;  in caam_init_rng()
281 	err = rng_create_sh_desc(ctx);  in caam_init_rng()
285 	ctx->current_buf = 0;  in caam_init_rng()
286 	ctx->cur_buf_idx = 0;  in caam_init_rng()
288 	err = caam_init_buf(ctx, 0);  in caam_init_rng()
292 	err = caam_init_buf(ctx, 1);  in caam_init_rng()