1 // SPDX-License-Identifier: GPL-2.0-or-later
4 int sun4i_ss_prng_seed(struct crypto_rng *tfm, const u8 *seed,
7 struct sun4i_ss_alg_template *algt;
8 struct rng_alg *alg = crypto_rng_alg(tfm);
10 algt = container_of(alg, struct sun4i_ss_alg_template, alg.rng);
11 memcpy(algt->ss->seed, seed, slen);
16 int sun4i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src,
17 unsigned int slen, u8 *dst, unsigned int dlen)
19 struct sun4i_ss_alg_template *algt;
20 struct rng_alg *alg = crypto_rng_alg(tfm);
23 u32 *data = (u32 *)dst;
24 const u32 mode = SS_OP_PRNG | SS_PRNG_CONTINUE | SS_ENABLED;
26 struct sun4i_ss_ctx *ss;
27 unsigned int todo = (dlen / 4) * 4;
29 algt = container_of(alg, struct sun4i_ss_alg_template, alg.rng);
32 err = pm_runtime_resume_and_get(ss->dev);
36 if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN4I_SS_DEBUG)) {
38 algt->stat_bytes += todo;
41 spin_lock_bh(&ss->slock);
43 writel(mode, ss->base + SS_CTL);
47 for (i = 0; i < SS_SEED_LEN / BITS_PER_LONG; i++)
48 writel(ss->seed[i], ss->base + SS_KEY0 + i * 4);
50 /* Read the random data */
51 len = min_t(size_t, SS_DATA_LEN / BITS_PER_BYTE, todo);
52 readsl(ss->base + SS_TXFIFO, data, len / 4);
57 for (i = 0; i < SS_SEED_LEN / BITS_PER_LONG; i++) {
58 v = readl(ss->base + SS_KEY0 + i * 4);
63 writel(0, ss->base + SS_CTL);
64 spin_unlock_bh(&ss->slock);
66 pm_runtime_put(ss->dev);