Re: [PATCH v3 09/20] drivers: crypto: meson: process more than MAXDESCS descriptors
From: Vadim Fedorenko
Date: Tue Feb 06 2024 - 09:09:47 EST
On 05/02/2024 15:55, Alexey Romanov wrote:
1. The old alhorithm was not designed to process a large
amount of memory, and therefore gave incorrect results.
2. Not all Amlogic SoC's use 3 KEY/IV descriptors.
Add keyiv descriptors count parameter to platform data.
Signed-off-by: Alexey Romanov <avromanov@xxxxxxxxxxxxxxxxx>
---
drivers/crypto/amlogic/amlogic-gxl-cipher.c | 443 ++++++++++++--------
drivers/crypto/amlogic/amlogic-gxl-core.c | 1 +
drivers/crypto/amlogic/amlogic-gxl.h | 2 +
3 files changed, 281 insertions(+), 165 deletions(-)
diff --git a/drivers/crypto/amlogic/amlogic-gxl-cipher.c b/drivers/crypto/amlogic/amlogic-gxl-cipher.c
index c662c4b86e97..9c96e7b65e1e 100644
--- a/drivers/crypto/amlogic/amlogic-gxl-cipher.c
+++ b/drivers/crypto/amlogic/amlogic-gxl-cipher.c
@@ -17,35 +17,41 @@
#include <crypto/internal/skcipher.h>
#include "amlogic-gxl.h"
[.. skip ..]
@@ -84,176 +295,78 @@ static int meson_cipher(struct skcipher_request *areq)
struct meson_dev *mc = op->mc;
struct skcipher_alg *alg = crypto_skcipher_alg(tfm);
struct meson_alg_template *algt;
- int flow = rctx->flow;
- unsigned int todo, eat, len;
- struct scatterlist *src_sg = areq->src;
- struct scatterlist *dst_sg = areq->dst;
- struct meson_desc *desc;
- int nr_sgs, nr_sgd;
- int i, err = 0;
- unsigned int keyivlen, ivsize, offset, tloffset;
- dma_addr_t phykeyiv;
- void *backup_iv = NULL, *bkeyiv;
- u32 v;
-
- algt = container_of(alg, struct meson_alg_template, alg.skcipher.base);
+ struct cipher_ctx ctx = {
+ .areq = areq,
+ .src_offset = 0,
+ .dst_offset = 0,
+ .src_sg = areq->src,
+ .dst_sg = areq->dst,
+ .cryptlen = areq->cryptlen,
+ };
+ unsigned int ivsize = crypto_skcipher_ivsize(tfm);
+ int err;
- dev_dbg(mc->dev, "%s %s %u %x IV(%u) key=%u flow=%d\n", __func__,
+ dev_dbg(mc->dev, "%s %s %u %x IV(%u) key=%u ctx.flow=%d\n", __func__,
crypto_tfm_alg_name(areq->base.tfm),
areq->cryptlen,
rctx->op_dir, crypto_skcipher_ivsize(tfm),
- op->keylen, flow);
+ op->keylen, rctx->flow);
+
+ algt = container_of(alg, struct meson_alg_template, alg.skcipher.base);
#ifdef CONFIG_CRYPTO_DEV_AMLOGIC_GXL_DEBUG
algt->stat_req++;
- mc->chanlist[flow].stat_req++;
+ mc->chanlist[rctx->flow].stat_req++;
#endif
- /*
- * The hardware expect a list of meson_desc structures.
- * The 2 first structures store key
- * The third stores IV
- */
- bkeyiv = kzalloc(48, GFP_KERNEL | GFP_DMA);
- if (!bkeyiv)
+ op->key = kzalloc(48, GFP_KERNEL | GFP_DMA);
+ if (!op.key)
return -ENOMEM;
- memcpy(bkeyiv, op->key, op->keylen);
- keyivlen = op->keylen;
+ memcpy(op->key, op->key, op->keylen);
Apart form invalid if() you try to copy op->key to itself.
I believe it should be removed, because you initialize ctx.key.addr
later
+ ctx.keyiv.len = op->keylen;
+ if (ctx.keyiv.len == AES_KEYSIZE_192)
+ ctx.keyiv.len = AES_MAX_KEY_SIZE;
- ivsize = crypto_skcipher_ivsize(tfm);
- if (areq->iv && ivsize > 0) {
- if (ivsize > areq->cryptlen) {
- dev_err(mc->dev, "invalid ivsize=%d vs len=%d\n", ivsize, areq->cryptlen);
- err = -EINVAL;
- goto theend;
- }
- memcpy(bkeyiv + 32, areq->iv, ivsize);
- keyivlen = 48;
- if (rctx->op_dir == MESON_DECRYPT) {
- backup_iv = kzalloc(ivsize, GFP_KERNEL);
- if (!backup_iv) {
- err = -ENOMEM;
- goto theend;
- }
- offset = areq->cryptlen - ivsize;
- scatterwalk_map_and_copy(backup_iv, areq->src, offset,
- ivsize, 0);
- }
- }
- if (keyivlen == AES_KEYSIZE_192)
- keyivlen = AES_MAX_KEY_SIZE;
-
- phykeyiv = dma_map_single(mc->dev, bkeyiv, keyivlen,
+ ctx.keyiv.addr = dma_map_single(mc->dev, op->key, ctx.keyiv.len,
DMA_TO_DEVICE);
- err = dma_mapping_error(mc->dev, phykeyiv);
+ err = dma_mapping_error(mc->dev, ctx.keyiv.addr);
if (err) {
dev_err(mc->dev, "Cannot DMA MAP KEY IV\n");
goto theend;
}
- tloffset = 0;
- eat = 0;
- i = 0;
- while (keyivlen > eat) {
- desc = &mc->chanlist[flow].tl[tloffset];
- memset(desc, 0, sizeof(struct meson_desc));
- todo = min(keyivlen - eat, 16u);
- desc->t_src = cpu_to_le32(phykeyiv + i * 16);
- desc->t_dst = cpu_to_le32(i * 16);
- v = DESC_MODE_KEY | DESC_OWN | 16;
- desc->t_status = cpu_to_le32(v);
-
- eat += todo;
- i++;
- tloffset++;
- }
-
- if (areq->src == areq->dst) {
- nr_sgs = dma_map_sg(mc->dev, areq->src, sg_nents(areq->src),
- DMA_BIDIRECTIONAL);
- if (!nr_sgs) {
- dev_err(mc->dev, "Invalid SG count %d\n", nr_sgs);
- err = -EINVAL;
- goto theend;
- }
- nr_sgd = nr_sgs;
- } else {
- nr_sgs = dma_map_sg(mc->dev, areq->src, sg_nents(areq->src),
- DMA_TO_DEVICE);
- if (!nr_sgs || nr_sgs > MAXDESC - 3) {
- dev_err(mc->dev, "Invalid SG count %d\n", nr_sgs);
- err = -EINVAL;
- goto theend;
- }
- nr_sgd = dma_map_sg(mc->dev, areq->dst, sg_nents(areq->dst),
- DMA_FROM_DEVICE);
- if (!nr_sgd || nr_sgd > MAXDESC - 3) {
- dev_err(mc->dev, "Invalid SG count %d\n", nr_sgd);
- err = -EINVAL;
- goto theend;
- }
- }
-
- src_sg = areq->src;
- dst_sg = areq->dst;
- len = areq->cryptlen;
- while (src_sg) {
- desc = &mc->chanlist[flow].tl[tloffset];
- memset(desc, 0, sizeof(struct meson_desc));
-
- desc->t_src = cpu_to_le32(sg_dma_address(src_sg));
- desc->t_dst = cpu_to_le32(sg_dma_address(dst_sg));
- todo = min(len, sg_dma_len(src_sg));
- v = op->keymode | DESC_OWN | todo | algt->blockmode;
- if (rctx->op_dir)
- v |= DESC_ENCRYPTION;
- len -= todo;
-
- if (!sg_next(src_sg))
- v |= DESC_LAST;
- desc->t_status = cpu_to_le32(v);
- tloffset++;
- src_sg = sg_next(src_sg);
- dst_sg = sg_next(dst_sg);
- }
+ err = meson_map_scatterlist(areq, mc);
+ if (err)
+ goto theend;
- reinit_completion(&mc->chanlist[flow].complete);
- meson_dma_start(mc, flow);
+ ctx.tloffset = 0;
- err = wait_for_completion_interruptible_timeout(&mc->chanlist[flow].complete,
- msecs_to_jiffies(500));
- if (err == 0) {
- dev_err(mc->dev, "DMA timeout for flow %d\n", flow);
- err = -EINVAL;
- } else if (err < 0) {
- dev_err(mc->dev, "Waiting for DMA completion is failed (%d)\n", err);
- } else {
- /* No error */
- err = 0;
- }
+ while (ctx.cryptlen) {
+ meson_setup_keyiv_descs(&ctx);
- dma_unmap_single(mc->dev, phykeyiv, keyivlen, DMA_TO_DEVICE);
+ if (meson_setup_data_descs(&ctx)) {
+ err = meson_kick_hardware(&ctx);
+ if (err)
+ break;
+ }
- if (areq->src == areq->dst) {
- dma_unmap_sg(mc->dev, areq->src, sg_nents(areq->src), DMA_BIDIRECTIONAL);
- } else {
- dma_unmap_sg(mc->dev, areq->src, sg_nents(areq->src), DMA_TO_DEVICE);
- dma_unmap_sg(mc->dev, areq->dst, sg_nents(areq->dst), DMA_FROM_DEVICE);
- }
+ if (ctx.src_offset == sg_dma_len(ctx.src_sg)) {
+ ctx.src_offset = 0;
+ ctx.src_sg = sg_next(ctx.src_sg);
+ }
- if (areq->iv && ivsize > 0) {
- if (rctx->op_dir == MESON_DECRYPT) {
- memcpy(areq->iv, backup_iv, ivsize);
- } else {
- scatterwalk_map_and_copy(areq->iv, areq->dst,
- areq->cryptlen - ivsize,
- ivsize, 0);
+ if (ctx.dst_offset == sg_dma_len(ctx.dst_sg)) {
+ ctx.dst_offset = 0;
+ ctx.dst_sg = sg_next(ctx.dst_sg);
}
}
+
+ dma_unmap_single(mc->dev, ctx.keyiv.addr, ctx.keyiv.len, DMA_TO_DEVICE);
+ meson_unmap_scatterlist(areq, mc);
+
theend:
- kfree_sensitive(bkeyiv);
- kfree_sensitive(backup_iv);
+ kfree_sensitive(op->key);
return err;
}
diff --git a/drivers/crypto/amlogic/amlogic-gxl-core.c b/drivers/crypto/amlogic/amlogic-gxl-core.c
index 22ff2768b5e5..f93e14f5717d 100644
--- a/drivers/crypto/amlogic/amlogic-gxl-core.c
+++ b/drivers/crypto/amlogic/amlogic-gxl-core.c
@@ -199,6 +199,7 @@ static const struct meson_pdata meson_gxl_pdata = {
.descs_reg = 0x0,
.status_reg = 0x4,
.need_clk = true,
+ .setup_desc_cnt = 3,
};
static const struct of_device_id meson_crypto_of_match_table[] = {
diff --git a/drivers/crypto/amlogic/amlogic-gxl.h b/drivers/crypto/amlogic/amlogic-gxl.h
index a0d83c82906d..eb2f8cd72b65 100644
--- a/drivers/crypto/amlogic/amlogic-gxl.h
+++ b/drivers/crypto/amlogic/amlogic-gxl.h
@@ -83,11 +83,13 @@ struct meson_flow {
* @reg_descs: offset to descriptors register
* @reg_status: offset to status register
* @need_clk: clock input is needed
+ * @setup_desc_cnt: number of setup descriptor to configure.
*/
struct meson_pdata {
u32 descs_reg;
u32 status_reg;
bool need_clk;
+ u32 setup_desc_cnt;
};
/*