drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c

Source file repositories/reference/linux-study-clean/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c

File Facts

System
Linux kernel
Corpus path
drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c
Extension
.c
Size
25184 bytes
Lines
957
Domain
Driver Families
Bucket
drivers/crypto
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (ivlen) {
			if (rctx->op_dir == SS_ENCRYPTION) {
				if (i == 0)
					writel(rctx->p_iv[0], ss->base + SS_IV_ADR_REG);
				else
					writel(rctx->t_dst[i - 1].addr + rctx->t_dst[i - 1].len * 4 - ivlen, ss->base + SS_IV_ADR_REG);
			} else {
				writel(rctx->p_iv[i], ss->base + SS_IV_ADR_REG);
			}
		}

		dev_dbg(ss->dev,
			"Processing SG %d on flow %d %s ctl=%x %d to %d method=%x opmode=%x opdir=%x srclen=%d\n",
			i, flow, name, v,
			rctx->t_src[i].len, rctx->t_dst[i].len,
			rctx->method, rctx->op_mode,
			rctx->op_dir, rctx->t_src[i].len);

		writel(rctx->t_src[i].addr, ss->base + SS_SRC_ADR_REG);
		writel(rctx->t_dst[i].addr, ss->base + SS_DST_ADR_REG);
		writel(rctx->t_src[i].len, ss->base + SS_LEN_ADR_REG);

		reinit_completion(&ss->flows[flow].complete);
		ss->flows[flow].status = 0;
		wmb();

		writel(v, ss->base + SS_CTL_REG);
		mutex_unlock(&ss->mlock);
		wait_for_completion_interruptible_timeout(&ss->flows[flow].complete,
							  msecs_to_jiffies(2000));
		if (ss->flows[flow].status == 0) {
			dev_err(ss->dev, "DMA timeout for %s\n", name);
			return -EFAULT;
		}
	}

	return 0;
}

static irqreturn_t ss_irq_handler(int irq, void *data)
{
	struct sun8i_ss_dev *ss = (struct sun8i_ss_dev *)data;
	int flow = 0;
	u32 p;

	p = readl(ss->base + SS_INT_STA_REG);
	for (flow = 0; flow < MAXFLOW; flow++) {
		if (p & (BIT(flow))) {
			writel(BIT(flow), ss->base + SS_INT_STA_REG);
			ss->flows[flow].status = 1;
			complete(&ss->flows[flow].complete);
		}
	}

	return IRQ_HANDLED;
}

static struct sun8i_ss_alg_template ss_algs[] = {
{
	.type = CRYPTO_ALG_TYPE_SKCIPHER,
	.ss_algo_id = SS_ID_CIPHER_AES,
	.ss_blockmode = SS_ID_OP_CBC,
	.alg.skcipher.base = {
		.base = {
			.cra_name = "cbc(aes)",
			.cra_driver_name = "cbc-aes-sun8i-ss",
			.cra_priority = 400,
			.cra_blocksize = AES_BLOCK_SIZE,
			.cra_flags = CRYPTO_ALG_TYPE_SKCIPHER |
				CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY |
				CRYPTO_ALG_NEED_FALLBACK,
			.cra_ctxsize = sizeof(struct sun8i_cipher_tfm_ctx),
			.cra_module = THIS_MODULE,
			.cra_alignmask = 0xf,
			.cra_init = sun8i_ss_cipher_init,
			.cra_exit = sun8i_ss_cipher_exit,
		},
		.min_keysize	= AES_MIN_KEY_SIZE,
		.max_keysize	= AES_MAX_KEY_SIZE,
		.ivsize		= AES_BLOCK_SIZE,
		.setkey		= sun8i_ss_aes_setkey,
		.encrypt	= sun8i_ss_skencrypt,
		.decrypt	= sun8i_ss_skdecrypt,
	},
	.alg.skcipher.op = {
		.do_one_request = sun8i_ss_handle_cipher_request,
	},
},
{
	.type = CRYPTO_ALG_TYPE_SKCIPHER,

Annotation

Implementation Notes