// SPDX-License-Identifier: GPL-2.0+
/*
* caam - Freescale FSL CAAM support for ahash functions of crypto API
*
* Copyright 2011 Freescale Semiconductor, Inc.
* Copyright 2018-2019, 2023 NXP
*
* Based on caamalg.c crypto API driver.
*
* relationship of digest job descriptor or first job descriptor after init to
* shared descriptors:
*
* --------------- ---------------
* | JobDesc #1 |-------------------->| ShareDesc |
* | *(packet 1) | | (hashKey) |
* --------------- | (operation) |
* ---------------
*
* relationship of subsequent job descriptors to shared descriptors:
*
* --------------- ---------------
* | JobDesc #2 |-------------------->| ShareDesc |
* | *(packet 2) | |------------->| (hashKey) |
* --------------- | |-------->| (operation) |
* . | | | (load ctx2) |
* . | | ---------------
* --------------- | |
* | JobDesc #3 |------| |
* | *(packet 3) | |
* --------------- |
* . |
* . |
* --------------- |
* | JobDesc #4 |------------
* | *(packet 4) |
* ---------------
*
* The SharedDesc never changes for a connection unless rekeyed, but
* each packet will likely be in a different place. So all we need
* to know to process the packet is where the input is, where the
* output goes, and what context we want to process with. Context is
* in the SharedDesc, packet references in the JobDesc.
*
* So, a job desc looks like:
*
* ---------------------
* | Header |
* | ShareDesc Pointer |
* | SEQ_OUT_PTR |
* | (output buffer) |
* | (output length) |
* | SEQ_IN_PTR |
* | (input buffer) |
* | (input length) |
* ---------------------
*/
#include "compat.h"
#include "regs.h"
#include "intern.h"
#include "desc_constr.h"
#include "jr.h"
#include "error.h"
#include "sg_sw_sec4.h"
#include "key_gen.h"
#include "caamhash_desc.h"
#include <crypto/internal/engine.h>
#include <crypto/internal/hash.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/string.h>
#define CAAM_CRA_PRIORITY 3000
/* max hash key is max split key size */
#define CAAM_MAX_HASH_KEY_SIZE (SHA512_DIGEST_SIZE * 2)
#define CAAM_MAX_HASH_BLOCK_SIZE SHA512_BLOCK_SIZE
#define CAAM_MAX_HASH_DIGEST_SIZE SHA512_DIGEST_SIZE
#define DESC_HASH_MAX_USED_BYTES (DESC_AHASH_FINAL_LEN + \
CAAM_MAX_HASH_KEY_SIZE)
#define DESC_HASH_MAX_USED_LEN (DESC_HASH_MAX_USED_BYTES / CAAM_CMD_SZ)
/* caam context sizes for hashes: running digest + 8 */
#define HASH_MSG_LEN 8
#define MAX_CTX_LEN (HASH_MSG_LEN + SHA512_DIGEST_SIZE)
static struct list_head hash_list;
/* ahash per-session context */
struct caam_hash_ctx {
u32 sh_desc_update[DESC_HASH_MAX_USED_LEN] ____cacheline_aligned;
u32 sh_desc_update_first[DESC_HASH_MAX_USED_LEN] ____cacheline_aligned;
u32 sh_desc_fin[DESC_HASH_MAX_USED_LEN] ____cacheline_aligned;
u32 sh_desc_digest[DESC_HASH_MAX_USED_LEN] ____cacheline_aligned;
u8 key[CAAM_MAX_HASH_KEY_SIZE] ____cacheline_aligned;
dma_addr_t sh_desc_update_dma ____cacheline_aligned;
dma_addr_t sh_desc_update_first_dma;
dma_addr_t sh_desc_fin_dma;
dma_addr_t sh_desc_digest_dma;
enum dma_data_direction dir;
enum dma_data_direction key_dir;
struct device *jrdev;
int ctx_len;
struct alginfo adata;
};
/* ahash state */
struct caam_hash_state {
dma_addr_t buf_dma;
dma_addr_t ctx_dma;
int ctx_dma_len;
u8 buf[CAAM_MAX_HASH_BLOCK_SIZE] ____cacheline_aligned;
int buflen;
int next_buflen;
u8 caam_ctx[MAX_CTX_LEN] ____cacheline_aligned;
int (*update)(struct ahash_request *req) ____cacheline_aligned;
int (*final)(struct ahash_request *req);
int (*finup)(struct ahash_request *req);
struct ahash_edesc *edesc;
void (*ahash_op_done)(struct device *jrdev, u32 *desc, u32 err,
void *context);
};
struct caam_export_state {
u8 buf[CAAM_MAX_HASH_BLOCK_SIZE];
u8 caam_ctx[MAX_CTX_LEN];
int buflen;
int (*update)(struct ahash_request *req);
int (*final)(struct ahash_request *req);
int (*finup)(struct ahash_request *req);
};
static inline bool is_cmac_aes(u32 algtype)
{
return (algtype & (OP_ALG_ALGSEL_MASK | OP_ALG_AAI_MASK)) ==
(OP_ALG_ALGSEL_AES | OP_ALG_AAI_CMAC);
}
/* Common job descriptor seq in/out ptr routines */
/* Map state->caam_ctx, and append seq_out_ptr command that points to it */
static inline int map_seq_out_ptr_ctx(u32 *desc, struct device *jrdev,
struct caam_hash_state *state,
int ctx_len)
{
state->ctx_dma_len = ctx_len;
state->ctx_dma = dma_map_single(jrdev, state->caam_ctx,
ctx_len, DMA_FROM_DEVICE);
if (dma_mapping_error(jrdev, state->ctx_dma)) {
dev_err(jrdev, "unable to map ctx\n");
state->ctx_dma = 0;
return -ENOMEM;
}
append_seq_out_ptr(desc, state->ctx_dma, ctx_len, 0);
return 0;
}
/* Map current buffer in state (if length > 0) and put it in link table */
static inline int buf_map_to_sec4_sg(struct device *jrdev,
struct sec4_sg_entry *sec4_sg,
struct caam_hash_state *state)
{
int buflen = state->buflen;
if (!buflen)
return 0;
state->buf_dma = dma_map_single(jrdev, state->buf, buflen,
DMA_TO_DEVICE);
if (dma_mapping_error(jrdev, state->buf_dma)) {
dev_err(jrdev, "unable to map buf\n");
state->buf_dma = 0;
return -ENOMEM;
}
dma_to_sec4_sg_one(sec4_sg, state->buf_dma, buflen, 0);
return 0;
}
/* Map state->caam_ctx, and add it to link table */
static inline int ctx_map_to_sec4_sg(struct device *jrdev,
struct caam_hash_state *state, int ctx_len,
struct sec4_sg_entry *sec4_sg, u32 flag)
{
state->ctx_dma_len = ctx_len;
state->ctx_dma = dma_map_single(jrdev, state->caam_ctx, ctx_len, flag);
if (dma_mapping_error(jrdev, state->ctx_dma)) {
dev_err(jrdev, "unable to map ctx\n");
state->ctx_dma = 0;
return -ENOMEM;
}
dma_to_sec4_sg_one(sec4_sg, state->ctx_dma, ctx_len, 0);
return 0;
}
static int ahash_set_sh_desc(struct crypto_ahash *ahash)
{
struct caam_hash_ctx *ctx = crypto_ahash_ctx_dma(ahash);
int digestsize = crypto_ahash_digestsize(ahash);
struct device *jrdev = ctx->jrdev;
struct caam_drv_private *ctrlpriv = dev_get_drvdata(jrdev->parent);
u32 *desc;
ctx->adata.key_virt = ctx->key;
/* ahash_update shared descriptor */
desc = ctx->sh_desc_update;
cnstr_shdsc_ahash(desc, &ctx->adata, OP_ALG_AS_UPDATE, ctx->ctx_len,
ctx->ctx_len, true, ctrlpriv->era);
dma_sync_single_for_device(jrdev, ctx->sh_desc_update_dma,
desc_bytes(desc), ctx->dir);
print_hex_dump_debug("ahash update shdesc@"__stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
1);
/* ahash_update_first shared descriptor */
desc = ctx->sh_desc_update_first;
cnstr_shdsc_ahash(desc, &ctx->adata, OP_ALG_AS_INIT, ctx->ctx_len,
ctx->ctx_len, false, ctrlpriv->era);
dma_sync_single_for_device(jrdev, ctx->sh_desc_update_first_dma,
desc_bytes(desc), ctx->dir);
print_hex_dump_debug("ahash update first shdesc@"__stringify(__LINE__)
": ", DUMP_PREFIX_ADDRESS, 16, 4, desc,
desc_bytes(desc), 1);
/* ahash_final shared descriptor */
desc = ctx->sh_desc_fin;
cnstr_shdsc_ahash(desc, &ctx->adata, OP_ALG_AS_FINALIZE, digestsize,
ctx->ctx_len, true, ctrlpriv->era);
dma_sync_single_for_device(jrdev, ctx->sh_desc_fin_dma,
desc_bytes(desc), ctx->dir);
print_hex_dump_debug("ahash final shdesc@"__stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc,
desc_bytes(desc), 1);
/* ahash_digest shared descriptor */
desc = ctx->sh_desc_digest;
cnstr_shdsc_ahash(desc, &ctx->adata, OP_ALG_AS_INITFINAL, digestsize,
ctx->ctx_len, false, ctrlpriv->era);
dma_sync_single_for_device(jrdev, ctx->sh_desc_digest_dma,
desc_bytes(desc), ctx->dir);
print_hex_dump_debug("ahash digest shdesc@"__stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc,
desc_bytes(desc), 1);
return 0;
}
static int axcbc_set_sh_desc(struct crypto_ahash *ahash)
{
struct caam_hash_ctx *ctx = crypto_ahash_ctx_dma(ahash);
int digestsize = crypto_ahash_digestsize(ahash);
struct device *jrdev = ctx->jrdev;
u32 *desc;
/* shared descriptor for ahash_update */
desc = ctx->sh_desc_update;
cnstr_shdsc_sk_hash(desc, &ctx->adata, OP_ALG_AS_UPDATE,
ctx->ctx_len, ctx->ctx_len);
dma_sync_single_for_device(jrdev, ctx->sh_desc_update_dma,
desc_bytes(desc), ctx->dir);
print_hex_dump_debug("axcbc update shdesc@" __stringify(__LINE__)" : ",
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
1);
/* shared descriptor for ahash_{final,finup} */
desc = ctx->sh_desc_fin;
cnstr_shdsc_sk_hash(desc, &ctx->adata, OP_ALG_AS_FINALIZE,
digestsize, ctx->ctx_len);
dma_sync_single_for_device(jrdev, ctx->sh_desc_fin_dma,
desc_bytes(desc), ctx->dir);
print_hex_dump_debug("axcbc finup shdesc@" __stringify(__LINE__)" : ",
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
1);
/* key is immediate data for INIT and INITFINAL states */
ctx->adata.key_virt = ctx->key;
/* shared descriptor for first invocation of ahash_update */
desc = ctx->sh_desc_update_first;
cnstr_shdsc_sk_hash(desc, &ctx->adata, OP_ALG_AS_INIT, ctx->ctx_len,
ctx->ctx_len);
dma_sync_single_for_device(jrdev, ctx->sh_desc_update_first_dma,
desc_bytes(desc), ctx->dir);
print_hex_dump_debug("axcbc update first shdesc@" __stringify(__LINE__)
" : ", DUMP_PREFIX_ADDRESS, 16, 4, desc,
desc_bytes(desc), 1);
/* shared descriptor for ahash_digest */
desc = ctx->sh_desc_digest;
cnstr_shdsc_sk_hash(desc, &ctx->adata, OP_ALG_AS_INITFINAL,
digestsize, ctx->ctx_len);
dma_sync_single_for_device(jrdev, ctx->sh_desc_digest_dma,
desc_bytes(desc), ctx->dir);
print_hex_dump_debug("axcbc digest shdesc@" __stringify(__LINE__)" : ",
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
1);
return 0;
}
static int acmac_set_sh_desc(struct crypto_ahash *ahash)
{
struct caam_hash_ctx *ctx = crypto_ahash_ctx_dma(ahash);
int digestsize = crypto_ahash_digestsize(ahash);
struct device *jrdev = ctx->jrdev;
u32 *desc;
/* shared descriptor for ahash_update */
desc = ctx->sh_desc_update;
cnstr_shdsc_sk_hash(desc, &ctx->adata, OP_ALG_AS_UPDATE,
ctx->ctx_len, ctx->ctx_len);
dma_sync_single_for_device(jrdev, ctx->sh_desc_update_dma,
desc_bytes(desc), ctx->dir);
print_hex_dump_debug("acmac update shdesc@" __stringify(__LINE__)" : ",
DUMP_PREFIX_ADDRESS, 16, 4, desc,
desc_bytes(desc), 1);
/* shared descriptor for ahash_{final,finup} */
desc = ctx->sh_desc_fin;
cnstr_shdsc_sk_hash(desc, &ctx->adata, OP_ALG_AS_FINALIZE,
digestsize, ctx->ctx_len);
dma_sync_single_for_device(jrdev, ctx->sh_desc_fin_dma,
desc_bytes(desc), ctx->dir);
print_hex_dump_debug("acmac finup shdesc@" __stringify(__LINE__)" : ",
DUMP_PREFIX_ADDRESS, 16, 4, desc,
desc_bytes(desc), 1);
/* shared descriptor for first invocation of ahash_update */
desc = ctx->sh_desc_update_first;
cnstr_shdsc_sk_hash(desc, &ctx->adata, OP_ALG_AS_INIT, ctx->ctx_len,
ctx->ctx_len);
dma_sync_single_for_device(jrdev, ctx->sh_desc_update_first_dma,
desc_bytes(desc), ctx->dir);
print_hex_dump_debug("acmac update first shdesc@" __stringify(__LINE__)
" : ", DUMP_PREFIX_ADDRESS, 16, 4, desc,
desc_bytes(desc), 1);
/* shared descriptor for ahash_digest */
desc = ctx->sh_desc_digest;
cnstr_shdsc_sk_hash(desc, &ctx->adata, OP_ALG_AS_INITFINAL,
digestsize, ctx->ctx_len);
dma_sync_single_for_device(jrdev, ctx->sh_desc_digest_dma,
desc_bytes(desc), ctx->dir);
print_hex_dump_debug("acmac digest shdesc@" __stringify(__LINE__)" : ",
DUMP_PREFIX_ADDRESS, 16, 4, desc,
desc_bytes(desc), 1);
return 0;
}
/* Digest hash size if it is too large */
static int hash_digest_key(struct caam_hash_ctx *ctx, u32 *keylen, u8 *key,
u32 digestsize)
{
struct device *jrdev = ctx->jrdev;
u32 *desc;
struct split_key_result result;
dma_addr_t key_dma;
int ret;
desc = kmalloc(CAAM_CMD_SZ * 8 + CAAM_PTR_SZ * 2, GFP_KERNEL);
if (!desc)
return -ENOMEM;
init_job_desc(desc, 0);
key_dma = dma_map_single(jrdev, key, *keylen, DMA_BIDIRECTIONAL);
if (dma_mapping_error(jrdev, key_dma)) {
dev_err(jrdev, "unable to map key memory\n");
kfree(desc);
return -ENOMEM;
}
/* Job descriptor to perform unkeyed hash on key_in */
append_operation(desc, ctx->adata.algtype | OP_ALG_ENCRYPT |
OP_ALG_AS_INITFINAL);
append_seq_in_ptr(desc, key_dma, *keylen, 0);
append_seq_fifo_load(desc, *keylen, FIFOLD_CLASS_CLASS2 |
FIFOLD_TYPE_LAST2 | FIFOLD_TYPE_MSG);
append_seq_out_ptr(desc, key_dma, digestsize, 0);
append_seq_store(desc, digestsize, LDST_CLASS_2_CCB |
LDST_SRCDST_BYTE_CONTEXT);
print_hex_dump_debug("key_in@"__stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, key, *keylen, 1);
print_hex_dump_debug("jobdesc@"__stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
1);
result.err = 0;
init_completion(&result.completion);
ret = caam_jr_enqueue(jrdev, desc, split_key_done, &result);
if (ret == -EINPROGRESS) {
/* in progress */
wait_for_completion(&result.completion);
ret = result.err;
print_hex_dump_debug("digested key@"__stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, key,
digestsize, 1);
}
dma_unmap_single(jrdev, key_dma, *keylen, DMA_BIDIRECTIONAL);
*keylen = digestsize;
kfree(desc);
return ret;
}
static int ahash_setkey(struct crypto_ahash *ahash,
const u8 *key, unsigned int keylen)
{
struct caam_hash_ctx *ctx = crypto_ahash_ctx_dma(ahash);
struct device *jrdev = ctx->jrdev;
int blocksize = crypto_tfm_alg_blocksize(&ahash->base);
int digestsize = crypto_ahash_digestsize(ahash);
struct caam_drv_private *ctrlpriv = dev_get_drvdata(ctx->jrdev->parent);
int ret;
u8 *hashed_key = NULL;
dev_dbg(jrdev, "keylen %d\n", keylen);
if (keylen > blocksize) {
unsigned int aligned_len =
ALIGN(keylen, dma_get_cache_alignment());
if (aligned_len < keylen)
return -EOVERFLOW;
hashed_key = kmemdup(key, keylen, GFP_KERNEL);
if (!hashed_key)
return -ENOMEM;
ret = hash_digest_key(ctx, &keylen, hashed_key, digestsize);
if (ret)
goto bad_free_key;
key = hashed_key;
}
/*
* If DKP is supported, use it in the shared descriptor to generate
* the split key.
*/
if (ctrlpriv->era >= 6) {
ctx->adata.key_inline = true;
ctx->adata.keylen = keylen;
ctx->adata.keylen_pad = split_key_len(ctx->adata.algtype &
OP_ALG_ALGSEL_MASK);
if (ctx->adata.keylen_pad > CAAM_MAX_HASH_KEY_SIZE)
goto bad_free_key;
memcpy(ctx->key, key, keylen);
/*
* In case |user key| > |derived key|, using DKP<imm,imm>
* would result in invalid opcodes (last bytes of user key) in
* the resulting descriptor. Use DKP<ptr,imm> instead => both
* virtual and dma key addresses are needed.
*/
if (keylen > ctx->adata.keylen_pad)
dma_sync_single_for_device(ctx->jrdev,
ctx->adata.key_dma,
ctx->adata.keylen_pad,
DMA_TO_DEVICE);
} else {
ret = gen_split_key(ctx->jrdev, ctx->key, &ctx->adata, key,
keylen, CAAM_MAX_HASH_KEY_SIZE);
if (ret)
goto bad_free_key;
}
kfree(hashed_key);
return ahash_set_sh_desc(ahash);
bad_free_key:
kfree(hashed_key);
return -EINVAL;
}
static int axcbc_setkey(struct crypto_ahash *ahash, const u8 *key,
unsigned int keylen)
{
struct caam_hash_ctx *ctx = crypto_ahash_ctx_dma(ahash);
struct device *jrdev = ctx->jrdev;
if (keylen != AES_KEYSIZE_128)
return -EINVAL;
memcpy(ctx->key, key, keylen);
dma_sync_single_for_device(jrdev, ctx->adata.key_dma, keylen,
DMA_TO_DEVICE);
ctx->adata.keylen = keylen;
print_hex_dump_debug("axcbc ctx.key@" __stringify(__LINE__)" : ",
DUMP_PREFIX_ADDRESS, 16, 4, ctx->key, keylen, 1);
return axcbc_set_sh_desc(ahash);
}
static int acmac_setkey(struct crypto_ahash *ahash, const u8 *key,
unsigned int keylen)
{
struct caam_hash_ctx *ctx = crypto_ahash_ctx_dma(ahash);
int err;
err = aes_check_keylen(keylen);
if (err)
return err;
/* key is immediate data for all cmac shared descriptors */
ctx->adata.key_virt = key;
ctx->adata.keylen = keylen;
print_hex_dump_debug("acmac ctx.key@" __stringify(__LINE__)" : ",
DUMP_PREFIX_ADDRESS, 16, 4, key, keylen, 1);
return acmac_set_sh_desc(ahash);
}
/*
* ahash_edesc - s/w-extended ahash descriptor
* @sec4_sg_dma: physical mapped address of h/w link table
* @src_nents: number of segments in input scatterlist
* @sec4_sg_bytes: length of dma mapped sec4_sg space
* @bklog: stored to determine if the request needs backlog
* @hw_desc: the h/w job descriptor followed by any referenced link tables
* @sec4_sg: h/w link table
*/
struct ahash_edesc {
dma_addr_t sec4_sg_dma;
int src_nents;
int sec4_sg_bytes;
bool bklog;
u32 hw_desc[DESC_JOB_IO_LEN_MAX / sizeof(u32)] ____cacheline_aligned;
struct sec4_sg_entry sec4_sg[];
};
static inline void ahash_unmap(struct device *dev,
struct ahash_edesc *edesc,
struct ahash_request *req, int dst_len)
{
struct caam_hash_state *state = ahash_request_ctx_dma(req);
if (edesc->src_nents)
dma_unmap_sg(dev, req->src, edesc->src_nents, DMA_TO_DEVICE);
if (edesc->sec4_sg_bytes)
dma_unmap_single(dev, edesc->sec4_sg_dma,
edesc->sec4_sg_bytes, DMA_TO_DEVICE);
if (state->buf_dma) {
dma_unmap_single(dev, state->buf_dma, state->buflen,
DMA_TO_DEVICE);
state->buf_dma = 0;
}
}
static inline void ahash_unmap_ctx(struct device *dev,
struct ahash_edesc *edesc,
struct ahash_request *req, int dst_len, u32 flag)
{
struct caam_hash_state *state = ahash_request_ctx_dma(req);
if (state->ctx_dma) {
dma_unmap_single(dev, state->ctx_dma, state->ctx_dma_len, flag);
state->ctx_dma = 0;
}
ahash_unmap(dev, edesc, req, dst_len);
}
static inline void ahash_done_cpy(struct device *jrdev, u32 *desc, u32 err,
void *context, enum dma_data_direction dir)
{
struct ahash_request *req = context;
struct caam_drv_private_jr *jrp = dev_get_drvdata(jrdev);
struct ahash_edesc *edesc;
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
int digestsize = crypto_ahash_digestsize(ahash);
struct caam_hash_state *state = ahash_request_ctx_dma(req);
struct caam_hash_ctx *ctx = crypto_ahash_ctx_dma(ahash);
int ecode = 0;
bool has_bklog;
dev_dbg(jrdev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
edesc = state->edesc;
has_bklog = edesc->bklog;
if (err)
ecode = caam_jr_strstatus(jrdev, err);
ahash_unmap_ctx(jrdev, edesc, req, digestsize, dir);
memcpy(req->result, state->caam_ctx, digestsize);
kfree(edesc);
print_hex_dump_debug("ctx@"__stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, state->caam_ctx,
ctx->ctx_len, 1);
/*
* If no backlog flag, the completion of the request is done
* by CAAM, not crypto engine.
*/
if (!has_bklog)
ahash_request_complete(req, ecode);
else
crypto_finalize_hash_request(jrp->engine, req, ecode);
}
static void ahash_done(struct device *jrdev, u32 *desc, u32 err,
void *context)
{
ahash_done_cpy(jrdev, desc, err, context, DMA_FROM_DEVICE);
}
static void ahash_done_ctx_src(struct device *jrdev, u32 *desc, u32 err,
void *context)
{
ahash_done_cpy(jrdev, desc, err, context, DMA_BIDIRECTIONAL);
}
static inline void ahash_done_switch(struct device *jrdev, u32 *desc, u32 err,
void *context, enum dma_data_direction dir)
{
struct ahash_request *req = context;
struct caam_drv_private_jr *jrp = dev_get_drvdata(jrdev);
struct ahash_edesc *edesc;
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
struct caam_hash_ctx *ctx = crypto_ahash_ctx_dma(ahash);
struct caam_hash_state *state = ahash_request_ctx_dma(req);
int digestsize = crypto_ahash_digestsize(ahash);
int ecode = 0;
bool has_bklog;
dev_dbg(jrdev, "%s %d: err 0x%x\n", __func__, __LINE__, err);
edesc = state->edesc;
has_bklog = edesc->bklog;
if (err)
ecode = caam_jr_strstatus(jrdev, err);
ahash_unmap_ctx(jrdev, edesc, req, ctx->ctx_len, dir);
kfree(edesc);
scatterwalk_map_and_copy(state->buf, req->src,
req->nbytes - state->next_buflen,
state->next_buflen, 0);
state->buflen = state->next_buflen;
print_hex_dump_debug("buf@" __stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, state->buf,
state->buflen, 1);
print_hex_dump_debug("ctx@"__stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, state->caam_ctx,
ctx->ctx_len, 1);
if (req->result)
print_hex_dump_debug("result@"__stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, req->result,
digestsize, 1);
/*
* If no backlog flag, the completion of the request is done
* by CAAM, not crypto engine.
*/
if (!has_bklog)
ahash_request_complete(req, ecode);
else
crypto_finalize_hash_request(jrp->engine, req, ecode);
}
static void ahash_done_bi(struct device *jrdev, u32 *desc, u32 err,
void *context)
{
ahash_done_switch(jrdev, desc, err, context, DMA_BIDIRECTIONAL);
}
static void ahash_done_ctx_dst(struct device *jrdev, u32 *desc, u32 err,
void *context)
{
ahash_done_switch(jrdev, desc, err, context, DMA_FROM_DEVICE);
}
/*
* Allocate an enhanced descriptor, which contains the hardware descriptor
* and space for hardware scatter table containing sg_num entries.
*/
static struct ahash_edesc *ahash_edesc_alloc(struct ahash_request *req,
int sg_num, u32 *sh_desc,
dma_addr_t sh_desc_dma)
{
struct caam_hash_state *state = ahash_request_ctx_dma(req);
gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
GFP_KERNEL : GFP_ATOMIC;
struct ahash_edesc *edesc;
sg_num = pad_sg_nents(sg_num);
edesc = kzalloc(struct_size(edesc, sec4_sg, sg_num), flags);
if (!edesc)
return NULL;
state->edesc = edesc;
init_job_desc_shared(edesc->hw_desc, sh_desc_dma, desc_len(sh_desc),
HDR_SHARE_DEFER | HDR_REVERSE);
return edesc;
}
static int ahash_edesc_add_src(struct caam_hash_ctx *ctx,
struct ahash_edesc *edesc,
struct ahash_request *req, int nents,
unsigned int first_sg,
unsigned int first_bytes, size_t to_hash)
{
dma_addr_t src_dma;
u32 options;
if (nents > 1 || first_sg) {
struct sec4_sg_entry *sg = edesc->sec4_sg;
unsigned int sgsize = sizeof(*sg) *
pad_sg_nents(first_sg + nents);
sg_to_sec4_sg_last(req->src, to_hash, sg + first_sg, 0);
src_dma = dma_map_single(ctx->jrdev, sg, sgsize, DMA_TO_DEVICE);
if (dma_mapping_error(ctx->jrdev, src_dma)) {
dev_err(ctx->jrdev, "unable to map S/G table\n");
return -ENOMEM;
}
edesc->sec4_sg_bytes = sgsize;
edesc->sec4_sg_dma = src_dma;
options = LDST_SGF;
} else {
src_dma = sg_dma_address(req->src);
options = 0;
}
append_seq_in_ptr(edesc->hw_desc, src_dma, first_bytes + to_hash,
options);
return 0;
}
static int ahash_do_one_req(struct crypto_engine *engine, void *areq)
{
struct ahash_request *req = ahash_request_cast(areq);
struct caam_hash_ctx *ctx = crypto_ahash_ctx_dma(crypto_ahash_reqtfm(req));
struct caam_hash_state *state = ahash_request_ctx_dma(req);
struct device *jrdev = ctx->jrdev;
u32 *desc = state->edesc->hw_desc;
int ret;
state->edesc->bklog = true;
ret = caam_jr_enqueue(jrdev, desc, state->ahash_op_done, req);
if (ret == -ENOSPC && engine->retry_support)
return ret;
if (ret != -EINPROGRESS) {
ahash_unmap(jrdev, state->edesc, req, 0);
kfree(state->edesc);
} else {
ret = 0;
}
return ret;
}
static int ahash_enqueue_req(struct device *jrdev,
void (*cbk)(struct device *jrdev, u32 *desc,
u32 err, void *context),
struct ahash_request *req,
int dst_len, enum dma_data_direction dir)
{
struct caam_drv_private_jr *jrpriv = dev_get_drvdata(jrdev);
struct caam_hash_state *state = ahash_request_ctx_dma(req);
struct ahash_edesc *edesc = state->edesc;
u32 *desc = edesc->hw_desc;
int ret;
state->ahash_op_done = cbk;
/*
* Only the backlog request are sent to crypto-engine since the others
* can be handled by CAAM, if free, especially since JR has up to 1024
* entries (more than the 10 entries from crypto-engine).
*/
if (req->base.flags & CRYPTO_TFM_REQ_MAY_BACKLOG)
ret = crypto_transfer_hash_request_to_engine(jrpriv->engine,
req);
else
ret = caam_jr_enqueue(jrdev, desc, cbk, req);
if ((ret != -EINPROGRESS) && (ret != -EBUSY)) {
ahash_unmap_ctx(jrdev, edesc, req, dst_len, dir);
kfree(edesc);
}
return ret;
}
/* submit update job descriptor */
static int ahash_update_ctx(struct ahash_request *req)
{
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
struct caam_hash_ctx *ctx = crypto_ahash_ctx_dma(ahash);
struct caam_hash_state *state = ahash_request_ctx_dma(req);
struct device *jrdev = ctx->jrdev;
u8 *buf = state->buf;
int *buflen = &state->buflen;
int *next_buflen = &state->next_buflen;
int blocksize = crypto_ahash_blocksize(ahash);
int in_len = *buflen + req->nbytes, to_hash;
u32 *desc;
int src_nents, mapped_nents, sec4_sg_bytes, sec4_sg_src_index;
struct ahash_edesc *edesc;
int ret = 0;
*next_buflen = in_len & (blocksize - 1);
to_hash = in_len - *next_buflen;
/*
* For XCBC and CMAC, if to_hash is multiple of block size,
* keep last block in internal buffer
*/
if ((is_xcbc_aes(ctx->adata.algtype) ||
is_cmac_aes(ctx->adata.algtype)) && to_hash >= blocksize &&
(*next_buflen == 0)) {
*next_buflen = blocksize;
to_hash -= blocksize;
}
if (to_hash) {
int pad_nents;
int src_len = req->nbytes - *next_buflen;
src_nents = sg_nents_for_len(req->src, src_len);
if (src_nents < 0) {
dev_err(jrdev, "Invalid number of src SG.\n");
return src_nents;
}
if (src_nents) {
mapped_nents = dma_map_sg(jrdev, req->src, src_nents,
DMA_TO_DEVICE);
if (!mapped_nents) {
dev_err(jrdev, "unable to DMA map source\n");
return -ENOMEM;
}
} else {
mapped_nents = 0;
}
sec4_sg_src_index = 1 + (*buflen ? 1 : 0);
pad_nents = pad_sg_nents(sec4_sg_src_index + mapped_nents);
sec4_sg_bytes = pad_nents * sizeof(struct sec4_sg_entry);
/*
* allocate space for base edesc and hw desc commands,
* link tables
*/
edesc = ahash_edesc_alloc(req, pad_nents, ctx->sh_desc_update,
ctx->sh_desc_update_dma);
if (!edesc) {
dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE);
return -ENOMEM;
}
edesc->src_nents = src_nents;
edesc->sec4_sg_bytes = sec4_sg_bytes;
ret = ctx_map_to_sec4_sg(jrdev, state, ctx->ctx_len,
edesc->sec4_sg, DMA_BIDIRECTIONAL);
if (ret)
goto unmap_ctx;
ret = buf_map_to_sec4_sg(jrdev, edesc->sec4_sg + 1, state);
if (ret)
goto unmap_ctx;
if (mapped_nents)
sg_to_sec4_sg_last(req->src, src_len,
edesc->sec4_sg + sec4_sg_src_index,
0);
else
sg_to_sec4_set_last(edesc->sec4_sg + sec4_sg_src_index -
1);
desc = edesc->hw_desc;
edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
sec4_sg_bytes,
DMA_TO_DEVICE);
if (dma_mapping_error(jrdev, edesc->sec4_sg_dma)) {
dev_err(jrdev, "unable to map S/G table\n");
ret = -ENOMEM;
goto unmap_ctx;
}
append_seq_in_ptr(desc, edesc->sec4_sg_dma, ctx->ctx_len +
to_hash, LDST_SGF);
append_seq_out_ptr(desc, state->ctx_dma, ctx->ctx_len, 0);
print_hex_dump_debug("jobdesc@"__stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc,
desc_bytes(desc), 1);
ret = ahash_enqueue_req(jrdev, ahash_done_bi, req,
ctx->ctx_len, DMA_BIDIRECTIONAL);
} else if (*next_buflen) {
scatterwalk_map_and_copy(buf + *buflen, req->src, 0,
req->nbytes, 0);
*buflen = *next_buflen;
print_hex_dump_debug("buf@" __stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, buf,
*buflen, 1);
}
return ret;
unmap_ctx:
ahash_unmap_ctx(jrdev, edesc, req, ctx->ctx_len, DMA_BIDIRECTIONAL);
kfree(edesc);
return ret;
}
static int ahash_final_ctx(struct ahash_request *req)
{
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
struct caam_hash_ctx *ctx = crypto_ahash_ctx_dma(ahash);
struct caam_hash_state *state = ahash_request_ctx_dma(req);
struct device *jrdev = ctx->jrdev;
int buflen = state->buflen;
u32 *desc;
int sec4_sg_bytes;
int digestsize = crypto_ahash_digestsize(ahash);
struct ahash_edesc *edesc;
int ret;
sec4_sg_bytes = pad_sg_nents(1 + (buflen ? 1 : 0)) *
sizeof(struct sec4_sg_entry);
/* allocate space for base edesc and hw desc commands, link tables */
edesc = ahash_edesc_alloc(req, 4, ctx->sh_desc_fin,
ctx->sh_desc_fin_dma);
if (!edesc)
return -ENOMEM;
desc = edesc->hw_desc;
edesc->sec4_sg_bytes = sec4_sg_bytes;
ret = ctx_map_to_sec4_sg(jrdev, state, ctx->ctx_len,
edesc->sec4_sg, DMA_BIDIRECTIONAL);
if (ret)
goto unmap_ctx;
ret = buf_map_to_sec4_sg(jrdev, edesc->sec4_sg + 1, state);
if (ret)
goto unmap_ctx;
sg_to_sec4_set_last(edesc->sec4_sg + (buflen ? 1 : 0));
edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
sec4_sg_bytes, DMA_TO_DEVICE);
if (dma_mapping_error(jrdev, edesc->sec4_sg_dma)) {
dev_err(jrdev, "unable to map S/G table\n");
ret = -ENOMEM;
goto unmap_ctx;
}
append_seq_in_ptr(desc, edesc->sec4_sg_dma, ctx->ctx_len + buflen,
LDST_SGF);
append_seq_out_ptr(desc, state->ctx_dma, digestsize, 0);
print_hex_dump_debug("jobdesc@"__stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
1);
return ahash_enqueue_req(jrdev, ahash_done_ctx_src, req,
digestsize, DMA_BIDIRECTIONAL);
unmap_ctx:
ahash_unmap_ctx(jrdev, edesc, req, digestsize, DMA_BIDIRECTIONAL);
kfree(edesc);
return ret;
}
static int ahash_finup_ctx(struct ahash_request *req)
{
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
struct caam_hash_ctx *ctx = crypto_ahash_ctx_dma(ahash);
struct caam_hash_state *state = ahash_request_ctx_dma(req);
struct device *jrdev = ctx->jrdev;
int buflen = state->buflen;
u32 *desc;
int sec4_sg_src_index;
int src_nents, mapped_nents;
int digestsize = crypto_ahash_digestsize(ahash);
struct ahash_edesc *edesc;
int ret;
src_nents = sg_nents_for_len(req->src, req->nbytes);
if (src_nents < 0) {
dev_err(jrdev, "Invalid number of src SG.\n");
return src_nents;
}
if (src_nents) {
mapped_nents = dma_map_sg(jrdev, req->src, src_nents,
DMA_TO_DEVICE);
if (!mapped_nents) {
dev_err(jrdev, "unable to DMA map source\n");
return -ENOMEM;
}
} else {
mapped_nents = 0;
}
sec4_sg_src_index = 1 + (buflen ? 1 : 0);
/* allocate space for base edesc and hw desc commands, link tables */
edesc = ahash_edesc_alloc(req, sec4_sg_src_index + mapped_nents,
ctx->sh_desc_fin, ctx->sh_desc_fin_dma);
if (!edesc) {
dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE);
return -ENOMEM;
}
desc = edesc->hw_desc;
edesc->src_nents = src_nents;
ret = ctx_map_to_sec4_sg(jrdev, state, ctx->ctx_len,
edesc->sec4_sg, DMA_BIDIRECTIONAL);
if (ret)
goto unmap_ctx;
ret = buf_map_to_sec4_sg(jrdev, edesc->sec4_sg + 1, state);
if (ret)
goto unmap_ctx;
ret = ahash_edesc_add_src(ctx, edesc, req, mapped_nents,
sec4_sg_src_index, ctx->ctx_len + buflen,
req->nbytes);
if (ret)
goto unmap_ctx;
append_seq_out_ptr(desc, state->ctx_dma, digestsize, 0);
print_hex_dump_debug("jobdesc@"__stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
1);
return ahash_enqueue_req(jrdev, ahash_done_ctx_src, req,
digestsize, DMA_BIDIRECTIONAL);
unmap_ctx:
ahash_unmap_ctx(jrdev, edesc, req, digestsize, DMA_BIDIRECTIONAL);
kfree(edesc);
return ret;
}
static int ahash_digest(struct ahash_request *req)
{
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
struct caam_hash_ctx *ctx = crypto_ahash_ctx_dma(ahash);
struct caam_hash_state *state = ahash_request_ctx_dma(req);
struct device *jrdev = ctx->jrdev;
u32 *desc;
int digestsize = crypto_ahash_digestsize(ahash);
int src_nents, mapped_nents;
struct ahash_edesc *edesc;
int ret;
state->buf_dma = 0;
src_nents = sg_nents_for_len(req->src, req->nbytes);
if (src_nents < 0) {
dev_err(jrdev, "Invalid number of src SG.\n");
return src_nents;
}
if (src_nents) {
mapped_nents = dma_map_sg(jrdev, req->src, src_nents,
DMA_TO_DEVICE);
if (!mapped_nents) {
dev_err(jrdev, "unable to map source for DMA\n");
return -ENOMEM;
}
} else {
mapped_nents = 0;
}
/* allocate space for base edesc and hw desc commands, link tables */
edesc = ahash_edesc_alloc(req, mapped_nents > 1 ? mapped_nents : 0,
ctx->sh_desc_digest, ctx->sh_desc_digest_dma);
if (!edesc) {
dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE);
return -ENOMEM;
}
edesc->src_nents = src_nents;
ret = ahash_edesc_add_src(ctx, edesc, req, mapped_nents, 0, 0,
req->nbytes);
if (ret) {
ahash_unmap(jrdev, edesc, req, digestsize);
kfree(edesc);
return ret;
}
desc = edesc->hw_desc;
ret = map_seq_out_ptr_ctx(desc, jrdev, state, digestsize);
if (ret) {
ahash_unmap(jrdev, edesc, req, digestsize);
kfree(edesc);
return -ENOMEM;
}
print_hex_dump_debug("jobdesc@"__stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
1);
return ahash_enqueue_req(jrdev, ahash_done, req, digestsize,
DMA_FROM_DEVICE);
}
/* submit ahash final if it the first job descriptor */
static int ahash_final_no_ctx(struct ahash_request *req)
{
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
struct caam_hash_ctx *ctx = crypto_ahash_ctx_dma(ahash);
struct caam_hash_state *state = ahash_request_ctx_dma(req);
struct device *jrdev = ctx->jrdev;
u8 *buf = state->buf;
int buflen = state->buflen;
u32 *desc;
int digestsize = crypto_ahash_digestsize(ahash);
struct ahash_edesc *edesc;
int ret;
/* allocate space for base edesc and hw desc commands, link tables */
edesc = ahash_edesc_alloc(req, 0, ctx->sh_desc_digest,
ctx->sh_desc_digest_dma);
if (!edesc)
return -ENOMEM;
desc = edesc->hw_desc;
if (buflen) {
state->buf_dma = dma_map_single(jrdev, buf, buflen,
DMA_TO_DEVICE);
if (dma_mapping_error(jrdev, state->buf_dma)) {
dev_err(jrdev, "unable to map src\n");
goto unmap;
}
append_seq_in_ptr(desc, state->buf_dma, buflen, 0);
}
ret = map_seq_out_ptr_ctx(desc, jrdev, state, digestsize);
if (ret)
goto unmap;
print_hex_dump_debug("jobdesc@"__stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
1);
return ahash_enqueue_req(jrdev, ahash_done, req,
digestsize, DMA_FROM_DEVICE);
unmap:
ahash_unmap(jrdev, edesc, req, digestsize);
kfree(edesc);
return -ENOMEM;
}
/* submit ahash update if it the first job descriptor after update */
static int ahash_update_no_ctx(struct ahash_request *req)
{
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
struct caam_hash_ctx *ctx = crypto_ahash_ctx_dma(ahash);
struct caam_hash_state *state = ahash_request_ctx_dma(req);
struct device *jrdev = ctx->jrdev;
u8 *buf = state->buf;
int *buflen = &state->buflen;
int *next_buflen = &state->next_buflen;
int blocksize = crypto_ahash_blocksize(ahash);
int in_len = *buflen + req->nbytes, to_hash;
int sec4_sg_bytes, src_nents, mapped_nents;
struct ahash_edesc *edesc;
u32 *desc;
int ret = 0;
*next_buflen = in_len & (blocksize - 1);
to_hash = in_len - *next_buflen;
/*
* For XCBC and CMAC, if to_hash is multiple of block size,
* keep last block in internal buffer
*/
if ((is_xcbc_aes(ctx->adata.algtype) ||
is_cmac_aes(ctx->adata.algtype)) && to_hash >= blocksize &&
(*next_buflen == 0)) {
*next_buflen = blocksize;
to_hash -= blocksize;
}
if (to_hash) {
int pad_nents;
int src_len = req->nbytes - *next_buflen;
src_nents = sg_nents_for_len(req->src, src_len);
if (src_nents < 0) {
dev_err(jrdev, "Invalid number of src SG.\n");
return src_nents;
}
if (src_nents) {
mapped_nents = dma_map_sg(jrdev, req->src, src_nents,
DMA_TO_DEVICE);
if (!mapped_nents) {
dev_err(jrdev, "unable to DMA map source\n");
return -ENOMEM;
}
} else {
mapped_nents = 0;
}
pad_nents = pad_sg_nents(1 + mapped_nents);
sec4_sg_bytes = pad_nents * sizeof(struct sec4_sg_entry);
/*
* allocate space for base edesc and hw desc commands,
* link tables
*/
edesc = ahash_edesc_alloc(req, pad_nents,
ctx->sh_desc_update_first,
ctx->sh_desc_update_first_dma);
if (!edesc) {
dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE);
return -ENOMEM;
}
edesc->src_nents = src_nents;
edesc->sec4_sg_bytes = sec4_sg_bytes;
ret = buf_map_to_sec4_sg(jrdev, edesc->sec4_sg, state);
if (ret)
goto unmap_ctx;
sg_to_sec4_sg_last(req->src, src_len, edesc->sec4_sg + 1, 0);
desc = edesc->hw_desc;
edesc->sec4_sg_dma = dma_map_single(jrdev, edesc->sec4_sg,
sec4_sg_bytes,
DMA_TO_DEVICE);
if (dma_mapping_error(jrdev, edesc->sec4_sg_dma)) {
dev_err(jrdev, "unable to map S/G table\n");
ret = -ENOMEM;
goto unmap_ctx;
}
append_seq_in_ptr(desc, edesc->sec4_sg_dma, to_hash, LDST_SGF);
ret = map_seq_out_ptr_ctx(desc, jrdev, state, ctx->ctx_len);
if (ret)
goto unmap_ctx;
print_hex_dump_debug("jobdesc@"__stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc,
desc_bytes(desc), 1);
ret = ahash_enqueue_req(jrdev, ahash_done_ctx_dst, req,
ctx->ctx_len, DMA_TO_DEVICE);
if ((ret != -EINPROGRESS) && (ret != -EBUSY))
return ret;
state->update = ahash_update_ctx;
state->finup = ahash_finup_ctx;
state->final = ahash_final_ctx;
} else if (*next_buflen) {
scatterwalk_map_and_copy(buf + *buflen, req->src, 0,
req->nbytes, 0);
*buflen = *next_buflen;
print_hex_dump_debug("buf@" __stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, buf,
*buflen, 1);
}
return ret;
unmap_ctx:
ahash_unmap_ctx(jrdev, edesc, req, ctx->ctx_len, DMA_TO_DEVICE);
kfree(edesc);
return ret;
}
/* submit ahash finup if it the first job descriptor after update */
static int ahash_finup_no_ctx(struct ahash_request *req)
{
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
struct caam_hash_ctx *ctx = crypto_ahash_ctx_dma(ahash);
struct caam_hash_state *state = ahash_request_ctx_dma(req);
struct device *jrdev = ctx->jrdev;
int buflen = state->buflen;
u32 *desc;
int sec4_sg_bytes, sec4_sg_src_index, src_nents, mapped_nents;
int digestsize = crypto_ahash_digestsize(ahash);
struct ahash_edesc *edesc;
int ret;
src_nents = sg_nents_for_len(req->src, req->nbytes);
if (src_nents < 0) {
dev_err(jrdev, "Invalid number of src SG.\n");
return src_nents;
}
if (src_nents) {
mapped_nents = dma_map_sg(jrdev, req->src, src_nents,
DMA_TO_DEVICE);
if (!mapped_nents) {
dev_err(jrdev, "unable to DMA map source\n");
return -ENOMEM;
}
} else {
mapped_nents = 0;
}
sec4_sg_src_index = 2;
sec4_sg_bytes = (sec4_sg_src_index + mapped_nents) *
sizeof(struct sec4_sg_entry);
/* allocate space for base edesc and hw desc commands, link tables */
edesc = ahash_edesc_alloc(req, sec4_sg_src_index + mapped_nents,
ctx->sh_desc_digest, ctx->sh_desc_digest_dma);
if (!edesc) {
dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE);
return -ENOMEM;
}
desc = edesc->hw_desc;
edesc->src_nents = src_nents;
edesc->sec4_sg_bytes = sec4_sg_bytes;
ret = buf_map_to_sec4_sg(jrdev, edesc->sec4_sg, state);
if (ret)
goto unmap;
ret = ahash_edesc_add_src(ctx, edesc, req, mapped_nents, 1, buflen,
req->nbytes);
if (ret) {
dev_err(jrdev, "unable to map S/G table\n");
goto unmap;
}
ret = map_seq_out_ptr_ctx(desc, jrdev, state, digestsize);
if (ret)
goto unmap;
print_hex_dump_debug("jobdesc@"__stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc, desc_bytes(desc),
1);
return ahash_enqueue_req(jrdev, ahash_done, req,
digestsize, DMA_FROM_DEVICE);
unmap:
ahash_unmap(jrdev, edesc, req, digestsize);
kfree(edesc);
return -ENOMEM;
}
/* submit first update job descriptor after init */
static int ahash_update_first(struct ahash_request *req)
{
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
struct caam_hash_ctx *ctx = crypto_ahash_ctx_dma(ahash);
struct caam_hash_state *state = ahash_request_ctx_dma(req);
struct device *jrdev = ctx->jrdev;
u8 *buf = state->buf;
int *buflen = &state->buflen;
int *next_buflen = &state->next_buflen;
int to_hash;
int blocksize = crypto_ahash_blocksize(ahash);
u32 *desc;
int src_nents, mapped_nents;
struct ahash_edesc *edesc;
int ret = 0;
*next_buflen = req->nbytes & (blocksize - 1);
to_hash = req->nbytes - *next_buflen;
/*
* For XCBC and CMAC, if to_hash is multiple of block size,
* keep last block in internal buffer
*/
if ((is_xcbc_aes(ctx->adata.algtype) ||
is_cmac_aes(ctx->adata.algtype)) && to_hash >= blocksize &&
(*next_buflen == 0)) {
*next_buflen = blocksize;
to_hash -= blocksize;
}
if (to_hash) {
src_nents = sg_nents_for_len(req->src,
req->nbytes - *next_buflen);
if (src_nents < 0) {
dev_err(jrdev, "Invalid number of src SG.\n");
return src_nents;
}
if (src_nents) {
mapped_nents = dma_map_sg(jrdev, req->src, src_nents,
DMA_TO_DEVICE);
if (!mapped_nents) {
dev_err(jrdev, "unable to map source for DMA\n");
return -ENOMEM;
}
} else {
mapped_nents = 0;
}
/*
* allocate space for base edesc and hw desc commands,
* link tables
*/
edesc = ahash_edesc_alloc(req, mapped_nents > 1 ?
mapped_nents : 0,
ctx->sh_desc_update_first,
ctx->sh_desc_update_first_dma);
if (!edesc) {
dma_unmap_sg(jrdev, req->src, src_nents, DMA_TO_DEVICE);
return -ENOMEM;
}
edesc->src_nents = src_nents;
ret = ahash_edesc_add_src(ctx, edesc, req, mapped_nents, 0, 0,
to_hash);
if (ret)
goto unmap_ctx;
desc = edesc->hw_desc;
ret = map_seq_out_ptr_ctx(desc, jrdev, state, ctx->ctx_len);
if (ret)
goto unmap_ctx;
print_hex_dump_debug("jobdesc@"__stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, desc,
desc_bytes(desc), 1);
ret = ahash_enqueue_req(jrdev, ahash_done_ctx_dst, req,
ctx->ctx_len, DMA_TO_DEVICE);
if ((ret != -EINPROGRESS) && (ret != -EBUSY))
return ret;
state->update = ahash_update_ctx;
state->finup = ahash_finup_ctx;
state->final = ahash_final_ctx;
} else if (*next_buflen) {
state->update = ahash_update_no_ctx;
state->finup = ahash_finup_no_ctx;
state->final = ahash_final_no_ctx;
scatterwalk_map_and_copy(buf, req->src, 0,
req->nbytes, 0);
*buflen = *next_buflen;
print_hex_dump_debug("buf@" __stringify(__LINE__)": ",
DUMP_PREFIX_ADDRESS, 16, 4, buf,
*buflen, 1);
}
return ret;
unmap_ctx:
ahash_unmap_ctx(jrdev, edesc, req, ctx->ctx_len, DMA_TO_DEVICE);
kfree(edesc);
return ret;
}
static int ahash_finup_first(struct ahash_request *req)
{
return ahash_digest(req);
}
static int ahash_init(struct ahash_request *req)
{
struct caam_hash_state *state = ahash_request_ctx_dma(req);
state->update = ahash_update_first;
state->finup = ahash_finup_first;
state->final = ahash_final_no_ctx;
state->ctx_dma = 0;
state->ctx_dma_len = 0;
state->buf_dma = 0;
state->buflen = 0;
state->next_buflen = 0;
return 0;
}
static int ahash_update(struct ahash_request *req)
{
struct caam_hash_state *state = ahash_request_ctx_dma(req);
return state->update(req);
}
static int ahash_finup(struct ahash_request *req)
{
struct caam_hash_state *state = ahash_request_ctx_dma(req);
return state->finup(req);
}
static int ahash_final(struct ahash_request *req)
{
struct caam_hash_state *state = ahash_request_ctx_dma(req);
return state->final(req);
}
static int ahash_export(struct ahash_request *req, void *out)
{
struct caam_hash_state *state = ahash_request_ctx_dma(req);
struct caam_export_state *export = out;
u8 *buf = state->buf;
int len = state->buflen;
memcpy(export->buf, buf, len);
memcpy(export->caam_ctx, state->caam_ctx, sizeof(export->caam_ctx));
export->buflen = len;
export->update = state->update;
export->final = state->final;
export->finup = state->finup;
return 0;
}
static int ahash_import(struct ahash_request *req, const void *in)
{
struct caam_hash_state *state = ahash_request_ctx_dma(req);
const struct caam_export_state *export = in;
memset(state, 0, sizeof(*state));
memcpy(state->buf, export->buf, export->buflen);
memcpy(state->caam_ctx, export->caam_ctx, sizeof(state->caam_ctx));
state->buflen = export->buflen;
state->update = export->update;
state->final = export->final;
state->finup = export->finup;
return 0;
}
struct caam_hash_template {
char name[CRYPTO_MAX_ALG_NAME];
char driver_name[CRYPTO_MAX_ALG_NAME];
char hmac_name[CRYPTO_MAX_ALG_NAME];
char hmac_driver_name[CRYPTO_MAX_ALG_NAME];
unsigned int blocksize;
struct ahash_alg template_ahash;
u32 alg_type;
};
/* ahash descriptors */
static struct caam_hash_template driver_hash[] = {
{
.name = "sha1",
.driver_name = "sha1-caam",
.hmac_name = "hmac(sha1)",
.hmac_driver_name = "hmac-sha1-caam",
.blocksize = SHA1_BLOCK_SIZE,
.template_ahash = {
.init = ahash_init,
.update = ahash_update,
.final = ahash_final,
.finup = ahash_finup,
.digest = ahash_digest,
.export = ahash_export,
.import = ahash_import,
.setkey = ahash_setkey,
.halg = {
.digestsize = SHA1_DIGEST_SIZE,
.statesize = sizeof(struct caam_export_state),
},
},
.alg_type = OP_ALG_ALGSEL_SHA1,
}, {
.name = "sha224",
.driver_name = "sha224-caam",
.hmac_name = "hmac(sha224)",
.hmac_driver_name = "hmac-sha224-caam",
.blocksize = SHA224_BLOCK_SIZE,
.template_ahash = {
.init = ahash_init,
.update = ahash_update,
.final = ahash_final,
.finup = ahash_finup,
.digest = ahash_digest,
.export = ahash_export,
.import = ahash_import,
.setkey = ahash_setkey,
.halg = {
.digestsize = SHA224_DIGEST_SIZE,
.statesize = sizeof(struct caam_export_state),
},
},
.alg_type = OP_ALG_ALGSEL_SHA224,
}, {
.name = "sha256",
.driver_name = "sha256-caam",
.hmac_name = "hmac(sha256)",
.hmac_driver_name = "hmac-sha256-caam",
.blocksize = SHA256_BLOCK_SIZE,
.template_ahash = {
.init = ahash_init,
.update = ahash_update,
.final = ahash_final,
.finup = ahash_finup,
.digest = ahash_digest,
.export = ahash_export,
.import = ahash_import,
.setkey = ahash_setkey,
.halg = {
.digestsize = SHA256_DIGEST_SIZE,
.statesize = sizeof(struct caam_export_state),
},
},
.alg_type = OP_ALG_ALGSEL_SHA256,
}, {
.name = "sha384",
.driver_name = "sha384-caam",
.hmac_name = "hmac(sha384)",
.hmac_driver_name = "hmac-sha384-caam",
.blocksize = SHA384_BLOCK_SIZE,
.template_ahash = {
.init = ahash_init,
.update = ahash_update,
.final = ahash_final,
.finup = ahash_finup,
.digest = ahash_digest,
.export = ahash_export,
.import = ahash_import,
.setkey = ahash_setkey,
.halg = {
.digestsize = SHA384_DIGEST_SIZE,
.statesize = sizeof(struct caam_export_state),
},
},
.alg_type = OP_ALG_ALGSEL_SHA384,
}, {
.name = "sha512",
.driver_name = "sha512-caam",
.hmac_name = "hmac(sha512)",
.hmac_driver_name = "hmac-sha512-caam",
.blocksize = SHA512_BLOCK_SIZE,
.template_ahash = {
.init = ahash_init,
.update = ahash_update,
.final = ahash_final,
.finup = ahash_finup,
.digest = ahash_digest,
.export = ahash_export,
.import = ahash_import,
.setkey = ahash_setkey,
.halg = {
.digestsize = SHA512_DIGEST_SIZE,
.statesize = sizeof(struct caam_export_state),
},
},
.alg_type = OP_ALG_ALGSEL_SHA512,
}, {
.name = "md5",
.driver_name = "md5-caam",
.hmac_name = "hmac(md5)",
.hmac_driver_name = "hmac-md5-caam",
.blocksize = MD5_BLOCK_WORDS * 4,
.template_ahash = {
.init = ahash_init,
.update = ahash_update,
.final = ahash_final,
.finup = ahash_finup,
.digest = ahash_digest,
.export = ahash_export,
.import = ahash_import,
.setkey = ahash_setkey,
.halg = {
.digestsize = MD5_DIGEST_SIZE,
.statesize = sizeof(struct caam_export_state),
},
},
.alg_type = OP_ALG_ALGSEL_MD5,
}, {
.hmac_name = "xcbc(aes)",
.hmac_driver_name = "xcbc-aes-caam",
.blocksize = AES_BLOCK_SIZE,
.template_ahash = {
.init = ahash_init,
.update = ahash_update,
.final = ahash_final,
.finup = ahash_finup,
.digest = ahash_digest,
.export = ahash_export,
.import = ahash_import,
.setkey = axcbc_setkey,
.halg = {
.digestsize = AES_BLOCK_SIZE,
.statesize = sizeof(struct caam_export_state),
},
},
.alg_type = OP_ALG_ALGSEL_AES | OP_ALG_AAI_XCBC_MAC,
}, {
.hmac_name = "cmac(aes)",
.hmac_driver_name = "cmac-aes-caam",
.blocksize = AES_BLOCK_SIZE,
.template_ahash = {
.init = ahash_init,
.update = ahash_update,
.final = ahash_final,
.finup = ahash_finup,
.digest = ahash_digest,
.export = ahash_export,
.import = ahash_import,
.setkey = acmac_setkey,
.halg = {
.digestsize = AES_BLOCK_SIZE,
.statesize = sizeof(struct caam_export_state),
},
},
.alg_type = OP_ALG_ALGSEL_AES | OP_ALG_AAI_CMAC,
},
};
struct caam_hash_alg {
struct list_head entry;
int alg_type;
bool is_hmac;
struct ahash_engine_alg ahash_alg;
};
static int caam_hash_cra_init(struct crypto_tfm *tfm)
{
struct crypto_ahash *ahash = __crypto_ahash_cast(tfm);
struct crypto_alg *base = tfm->__crt_alg;
struct hash_alg_common *halg =
container_of(base, struct hash_alg_common, base);
struct ahash_alg *alg =
container_of(halg, struct ahash_alg, halg);
struct caam_hash_alg *caam_hash =
container_of(alg, struct caam_hash_alg, ahash_alg.base);
struct caam_hash_ctx *ctx = crypto_ahash_ctx_dma(ahash);
/* Sizes for MDHA running digests: MD5, SHA1, 224, 256, 384, 512 */
static const u8 runninglen[] = { HASH_MSG_LEN + MD5_DIGEST_SIZE,
HASH_MSG_LEN + SHA1_DIGEST_SIZE,
HASH_MSG_LEN + 32,
HASH_MSG_LEN + SHA256_DIGEST_SIZE,
HASH_MSG_LEN + 64,
HASH_MSG_LEN + SHA512_DIGEST_SIZE };
const size_t sh_desc_update_offset = offsetof(struct caam_hash_ctx,
sh_desc_update);
dma_addr_t dma_addr;
struct caam_drv_private *priv;
/*
* Get a Job ring from Job Ring driver to ensure in-order
* crypto request processing per tfm
*/
ctx->jrdev = caam_jr_alloc();
if (IS_ERR(ctx->jrdev)) {
pr_err("Job Ring Device allocation for transform failed\n");
return PTR_ERR(ctx->jrdev);
}
priv = dev_get_drvdata(ctx->jrdev->parent);
if (is_xcbc_aes(caam_hash->alg_type)) {
ctx->dir = DMA_TO_DEVICE;
ctx->key_dir = DMA_BIDIRECTIONAL;
ctx->adata.algtype = OP_TYPE_CLASS1_ALG | caam_hash->alg_type;
ctx->ctx_len = 48;
} else if (is_cmac_aes(caam_hash->alg_type)) {
ctx->dir = DMA_TO_DEVICE;
ctx->key_dir = DMA_NONE;
ctx->adata.algtype = OP_TYPE_CLASS1_ALG | caam_hash->alg_type;
ctx->ctx_len = 32;
} else {
if (priv->era >= 6) {
ctx->dir = DMA_BIDIRECTIONAL;
ctx->key_dir = caam_hash->is_hmac ? DMA_TO_DEVICE : DMA_NONE;
} else {
ctx->dir = DMA_TO_DEVICE;
ctx->key_dir = DMA_NONE;
}
ctx->adata.algtype = OP_TYPE_CLASS2_ALG | caam_hash->alg_type;
ctx->ctx_len = runninglen[(ctx->adata.algtype &
OP_ALG_ALGSEL_SUBMASK) >>
OP_ALG_ALGSEL_SHIFT];
}
if (ctx->key_dir != DMA_NONE) {
ctx->adata.key_dma = dma_map_single_attrs(ctx->jrdev, ctx->key,
ARRAY_SIZE(ctx->key),
ctx->key_dir,
DMA_ATTR_SKIP_CPU_SYNC);
if (dma_mapping_error(ctx->jrdev, ctx->adata.key_dma)) {
dev_err(ctx->jrdev, "unable to map key\n");
caam_jr_free(ctx->jrdev);
return -ENOMEM;
}
}
dma_addr = dma_map_single_attrs(ctx->jrdev, ctx->sh_desc_update,
offsetof(struct caam_hash_ctx, key) -
sh_desc_update_offset,
ctx->dir, DMA_ATTR_SKIP_CPU_SYNC);
if (dma_mapping_error(ctx->jrdev, dma_addr)) {
dev_err(ctx->jrdev, "unable to map shared descriptors\n");
if (ctx->key_dir != DMA_NONE)
dma_unmap_single_attrs(ctx->jrdev, ctx->adata.key_dma,
ARRAY_SIZE(ctx->key),
ctx->key_dir,
DMA_ATTR_SKIP_CPU_SYNC);
caam_jr_free(ctx->jrdev);
return -ENOMEM;
}
ctx->sh_desc_update_dma = dma_addr;
ctx->sh_desc_update_first_dma = dma_addr +
offsetof(struct caam_hash_ctx,
sh_desc_update_first) -
sh_desc_update_offset;
ctx->sh_desc_fin_dma = dma_addr + offsetof(struct caam_hash_ctx,
sh_desc_fin) -
sh_desc_update_offset;
ctx->sh_desc_digest_dma = dma_addr + offsetof(struct caam_hash_ctx,
sh_desc_digest) -
sh_desc_update_offset;
crypto_ahash_set_reqsize_dma(ahash, sizeof(struct caam_hash_state));
/*
* For keyed hash algorithms shared descriptors
* will be created later in setkey() callback
*/
return caam_hash->is_hmac ? 0 : ahash_set_sh_desc(ahash);
}
static void caam_hash_cra_exit(struct crypto_tfm *tfm)
{
struct caam_hash_ctx *ctx = crypto_tfm_ctx_dma(tfm);
dma_unmap_single_attrs(ctx->jrdev, ctx->sh_desc_update_dma,
offsetof(struct caam_hash_ctx, key) -
offsetof(struct caam_hash_ctx, sh_desc_update),
ctx->dir, DMA_ATTR_SKIP_CPU_SYNC);
if (ctx->key_dir != DMA_NONE)
dma_unmap_single_attrs(ctx->jrdev, ctx->adata.key_dma,
ARRAY_SIZE(ctx->key), ctx->key_dir,
DMA_ATTR_SKIP_CPU_SYNC);
caam_jr_free(ctx->jrdev);
}
void caam_algapi_hash_exit(void)
{
struct caam_hash_alg *t_alg, *n;
if (!hash_list.next)
return;
list_for_each_entry_safe(t_alg, n, &hash_list, entry) {
crypto_engine_unregister_ahash(&t_alg->ahash_alg);
list_del(&t_alg->entry);
kfree(t_alg);
}
}
static struct caam_hash_alg *
caam_hash_alloc(struct caam_hash_template *template,
bool keyed)
{
struct caam_hash_alg *t_alg;
struct ahash_alg *halg;
struct crypto_alg *alg;
t_alg = kzalloc(sizeof(*t_alg), GFP_KERNEL);
if (!t_alg)
return ERR_PTR(-ENOMEM);
t_alg->ahash_alg.base = template->template_ahash;
halg = &t_alg->ahash_alg.base;
alg = &halg->halg.base;
if (keyed) {
snprintf(alg->cra_name, CRYPTO_MAX_ALG_NAME, "%s",
template->hmac_name);
snprintf(alg->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
template->hmac_driver_name);
t_alg->is_hmac = true;
} else {
snprintf(alg->cra_name, CRYPTO_MAX_ALG_NAME, "%s",
template->name);
snprintf(alg->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
template->driver_name);
halg->setkey = NULL;
t_alg->is_hmac = false;
}
alg->cra_module = THIS_MODULE;
alg->cra_init = caam_hash_cra_init;
alg->cra_exit = caam_hash_cra_exit;
alg->cra_ctxsize = sizeof(struct caam_hash_ctx) + crypto_dma_padding();
alg->cra_priority = CAAM_CRA_PRIORITY;
alg->cra_blocksize = template->blocksize;
alg->cra_alignmask = 0;
alg->cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY;
t_alg->alg_type = template->alg_type;
t_alg->ahash_alg.op.do_one_request = ahash_do_one_req;
return t_alg;
}
int caam_algapi_hash_init(struct device *ctrldev)
{
int i = 0, err = 0;
struct caam_drv_private *priv = dev_get_drvdata(ctrldev);
unsigned int md_limit = SHA512_DIGEST_SIZE;
u32 md_inst, md_vid;
/*
* Register crypto algorithms the device supports. First, identify
* presence and attributes of MD block.
*/
if (priv->era < 10) {
struct caam_perfmon __iomem *perfmon = &priv->jr[0]->perfmon;
md_vid = (rd_reg32(&perfmon->cha_id_ls) &
CHA_ID_LS_MD_MASK) >> CHA_ID_LS_MD_SHIFT;
md_inst = (rd_reg32(&perfmon->cha_num_ls) &
CHA_ID_LS_MD_MASK) >> CHA_ID_LS_MD_SHIFT;
} else {
u32 mdha = rd_reg32(&priv->jr[0]->vreg.mdha);
md_vid = (mdha & CHA_VER_VID_MASK) >> CHA_VER_VID_SHIFT;
md_inst = mdha & CHA_VER_NUM_MASK;
}
/*
* Skip registration of any hashing algorithms if MD block
* is not present.
*/
if (!md_inst)
return 0;
/* Limit digest size based on LP256 */
if (md_vid == CHA_VER_VID_MD_LP256)
md_limit = SHA256_DIGEST_SIZE;
INIT_LIST_HEAD(&hash_list);
/* register crypto algorithms the device supports */
for (i = 0; i < ARRAY_SIZE(driver_hash); i++) {
struct caam_hash_alg *t_alg;
struct caam_hash_template *alg = driver_hash + i;
/* If MD size is not supported by device, skip registration */
if (is_mdha(alg->alg_type) &&
alg->template_ahash.halg.digestsize > md_limit)
continue;
/* register hmac version */
t_alg = caam_hash_alloc(alg, true);
if (IS_ERR(t_alg)) {
err = PTR_ERR(t_alg);
pr_warn("%s alg allocation failed\n",
alg->hmac_driver_name);
continue;
}
err = crypto_engine_register_ahash(&t_alg->ahash_alg);
if (err) {
pr_warn("%s alg registration failed: %d\n",
t_alg->ahash_alg.base.halg.base.cra_driver_name,
err);
kfree(t_alg);
} else
list_add_tail(&t_alg->entry, &hash_list);
if ((alg->alg_type & OP_ALG_ALGSEL_MASK) == OP_ALG_ALGSEL_AES)
continue;
/* register unkeyed version */
t_alg = caam_hash_alloc(alg, false);
if (IS_ERR(t_alg)) {
err = PTR_ERR(t_alg);
pr_warn("%s alg allocation failed\n", alg->driver_name);
continue;
}
err = crypto_engine_register_ahash(&t_alg->ahash_alg);
if (err) {
pr_warn("%s alg registration failed: %d\n",
t_alg->ahash_alg.base.halg.base.cra_driver_name,
err);
kfree(t_alg);
} else
list_add_tail(&t_alg->entry, &hash_list);
}
return err;
}
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