Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) #include "sun4i-ss.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) int sun4i_ss_prng_seed(struct crypto_rng *tfm, const u8 *seed,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 		       unsigned int slen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 	struct sun4i_ss_alg_template *algt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 	struct rng_alg *alg = crypto_rng_alg(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 	algt = container_of(alg, struct sun4i_ss_alg_template, alg.rng);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 	memcpy(algt->ss->seed, seed, slen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) int sun4i_ss_prng_generate(struct crypto_rng *tfm, const u8 *src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 			   unsigned int slen, u8 *dst, unsigned int dlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	struct sun4i_ss_alg_template *algt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	struct rng_alg *alg = crypto_rng_alg(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	int i, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 	u32 v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	u32 *data = (u32 *)dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	const u32 mode = SS_OP_PRNG | SS_PRNG_CONTINUE | SS_ENABLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	size_t len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	struct sun4i_ss_ctx *ss;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	unsigned int todo = (dlen / 4) * 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	algt = container_of(alg, struct sun4i_ss_alg_template, alg.rng);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	ss = algt->ss;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	err = pm_runtime_get_sync(ss->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	spin_lock_bh(&ss->slock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	writel(mode, ss->base + SS_CTL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	while (todo > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 		/* write the seed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 		for (i = 0; i < SS_SEED_LEN / BITS_PER_LONG; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 			writel(ss->seed[i], ss->base + SS_KEY0 + i * 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		/* Read the random data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		len = min_t(size_t, SS_DATA_LEN / BITS_PER_BYTE, todo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 		readsl(ss->base + SS_TXFIFO, data, len / 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 		data += len / 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 		todo -= len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		/* Update the seed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 		for (i = 0; i < SS_SEED_LEN / BITS_PER_LONG; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 			v = readl(ss->base + SS_KEY0 + i * 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 			ss->seed[i] = v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	writel(0, ss->base + SS_CTL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	spin_unlock_bh(&ss->slock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	pm_runtime_put(ss->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }