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crypto: marvell/cesa - add a new driver for Marvell's CESA

Browse Source 
The existing mv_cesa driver supports some features of the CESA IP but is
quite limited, and reworking it to support new features (like involving the
TDMA engine to offload the CPU) is almost impossible.
This driver has been rewritten from scratch to take those new features into
account.

This commit introduce the base infrastructure allowing us to add support
for DMA optimization.
It also includes support for one hash (SHA1) and one cipher (AES)
algorithm, and enable those features on the Armada 370 SoC.

Other algorithms and platforms will be added later on.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Arnaud Ebalard <arno@natisbad.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Boris BREZILLON 2015-06-18 15:46:20 +02:00 committed by Herbert Xu
parent 1fa2e9ae1d
commit f63601fd61
7 changed files with 2040 additions and 0 deletions
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15
drivers/crypto/Kconfig
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@ -173,6 +173,21 @@ config CRYPTO_DEV_MV_CESA
Currently the driver supports AES in ECB and CBC mode without DMA.
config CRYPTO_DEV_MARVELL_CESA
tristate "New Marvell's Cryptographic Engine driver"
depends on (PLAT_ORION || ARCH_MVEBU || COMPILE_TEST) && HAS_DMA && HAS_IOMEM
select CRYPTO_AES
select CRYPTO_DES
select CRYPTO_BLKCIPHER
select CRYPTO_HASH
select SRAM
help
This driver allows you to utilize the Cryptographic Engines and
Security Accelerator (CESA) which can be found on the Armada 370.
This driver is aimed at replacing the mv_cesa driver. This will only
happen once it has received proper testing.
config CRYPTO_DEV_NIAGARA2
tristate "Niagara2 Stream Processing Unit driver"
select CRYPTO_DES

1
drivers/crypto/Makefile
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@ -9,6 +9,7 @@ obj-$(CONFIG_CRYPTO_DEV_HIFN_795X) += hifn_795x.o
obj-$(CONFIG_CRYPTO_DEV_IMGTEC_HASH) += img-hash.o
obj-$(CONFIG_CRYPTO_DEV_IXP4XX) += ixp4xx_crypto.o
obj-$(CONFIG_CRYPTO_DEV_MV_CESA) += mv_cesa.o
obj-$(CONFIG_CRYPTO_DEV_MARVELL_CESA) += marvell/
obj-$(CONFIG_CRYPTO_DEV_MXS_DCP) += mxs-dcp.o
obj-$(CONFIG_CRYPTO_DEV_NIAGARA2) += n2_crypto.o
n2_crypto-y := n2_core.o n2_asm.o

2
drivers/crypto/marvell/Makefile Normal file
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@ -0,0 +1,2 @@
obj-$(CONFIG_CRYPTO_DEV_MARVELL_CESA) += marvell-cesa.o
marvell-cesa-objs := cesa.o cipher.o hash.o

417
drivers/crypto/marvell/cesa.c Normal file
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@ -0,0 +1,417 @@
/*
* Support for Marvell's Cryptographic Engine and Security Accelerator (CESA)
* that can be found on the following platform: Orion, Kirkwood, Armada. This
* driver supports the TDMA engine on platforms on which it is available.
*
* Author: Boris Brezillon <boris.brezillon@free-electrons.com>
* Author: Arnaud Ebalard <arno@natisbad.org>
*
* This work is based on an initial version written by
* Sebastian Andrzej Siewior < sebastian at breakpoint dot cc >
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include <linux/delay.h>
#include <linux/genalloc.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/kthread.h>
#include <linux/mbus.h>
#include <linux/platform_device.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/clk.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/of_irq.h>
#include "cesa.h"
struct mv_cesa_dev *cesa_dev;
static void mv_cesa_dequeue_req_unlocked(struct mv_cesa_engine *engine)
{
struct crypto_async_request *req, *backlog;
struct mv_cesa_ctx *ctx;
spin_lock_bh(&cesa_dev->lock);
backlog = crypto_get_backlog(&cesa_dev->queue);
req = crypto_dequeue_request(&cesa_dev->queue);
engine->req = req;
spin_unlock_bh(&cesa_dev->lock);
if (!req)
return;
if (backlog)
backlog->complete(backlog, -EINPROGRESS);
ctx = crypto_tfm_ctx(req->tfm);
ctx->ops->prepare(req, engine);
ctx->ops->step(req);
}
static irqreturn_t mv_cesa_int(int irq, void *priv)
{
struct mv_cesa_engine *engine = priv;
struct crypto_async_request *req;
struct mv_cesa_ctx *ctx;
u32 status, mask;
irqreturn_t ret = IRQ_NONE;
while (true) {
int res;
mask = mv_cesa_get_int_mask(engine);
status = readl(engine->regs + CESA_SA_INT_STATUS);
if (!(status & mask))
break;
/*
* TODO: avoid clearing the FPGA_INT_STATUS if this not
* relevant on some platforms.
*/
writel(~status, engine->regs + CESA_SA_FPGA_INT_STATUS);
writel(~status, engine->regs + CESA_SA_INT_STATUS);
ret = IRQ_HANDLED;
spin_lock_bh(&engine->lock);
req = engine->req;
spin_unlock_bh(&engine->lock);
if (req) {
ctx = crypto_tfm_ctx(req->tfm);
res = ctx->ops->process(req, status & mask);
if (res != -EINPROGRESS) {
spin_lock_bh(&engine->lock);
engine->req = NULL;
mv_cesa_dequeue_req_unlocked(engine);
spin_unlock_bh(&engine->lock);
ctx->ops->cleanup(req);
local_bh_disable();
req->complete(req, res);
local_bh_enable();
} else {
ctx->ops->step(req);
}
}
}
return ret;
}
int mv_cesa_queue_req(struct crypto_async_request *req)
{
int ret;
int i;
spin_lock_bh(&cesa_dev->lock);
ret = crypto_enqueue_request(&cesa_dev->queue, req);
spin_unlock_bh(&cesa_dev->lock);
if (ret != -EINPROGRESS)
return ret;
for (i = 0; i < cesa_dev->caps->nengines; i++) {
spin_lock_bh(&cesa_dev->engines[i].lock);
if (!cesa_dev->engines[i].req)
mv_cesa_dequeue_req_unlocked(&cesa_dev->engines[i]);
spin_unlock_bh(&cesa_dev->engines[i].lock);
}
return -EINPROGRESS;
}
static int mv_cesa_add_algs(struct mv_cesa_dev *cesa)
{
int ret;
int i, j;
for (i = 0; i < cesa->caps->ncipher_algs; i++) {
ret = crypto_register_alg(cesa->caps->cipher_algs[i]);
if (ret)
goto err_unregister_crypto;
}
for (i = 0; i < cesa->caps->nahash_algs; i++) {
ret = crypto_register_ahash(cesa->caps->ahash_algs[i]);
if (ret)
goto err_unregister_ahash;
}
return 0;
err_unregister_ahash:
for (j = 0; j < i; j++)
crypto_unregister_ahash(cesa->caps->ahash_algs[j]);
i = cesa->caps->ncipher_algs;
err_unregister_crypto:
for (j = 0; j < i; j++)
crypto_unregister_alg(cesa->caps->cipher_algs[j]);
return ret;
}
static void mv_cesa_remove_algs(struct mv_cesa_dev *cesa)
{
int i;
for (i = 0; i < cesa->caps->nahash_algs; i++)
crypto_unregister_ahash(cesa->caps->ahash_algs[i]);
for (i = 0; i < cesa->caps->ncipher_algs; i++)
crypto_unregister_alg(cesa->caps->cipher_algs[i]);
}
static struct crypto_alg *armada_370_cipher_algs[] = {
&mv_cesa_ecb_aes_alg,
&mv_cesa_cbc_aes_alg,
};
static struct ahash_alg *armada_370_ahash_algs[] = {
&mv_sha1_alg,
&mv_ahmac_sha1_alg,
};
static const struct mv_cesa_caps armada_370_caps = {
.nengines = 1,
.cipher_algs = armada_370_cipher_algs,
.ncipher_algs = ARRAY_SIZE(armada_370_cipher_algs),
.ahash_algs = armada_370_ahash_algs,
.nahash_algs = ARRAY_SIZE(armada_370_ahash_algs),
};
static const struct of_device_id mv_cesa_of_match_table[] = {
{ .compatible = "marvell,armada-370-crypto", .data = &armada_370_caps },
{}
};
MODULE_DEVICE_TABLE(of, mv_cesa_of_match_table);
static int mv_cesa_get_sram(struct platform_device *pdev, int idx)
{
struct mv_cesa_dev *cesa = platform_get_drvdata(pdev);
struct mv_cesa_engine *engine = &cesa->engines[idx];
const char *res_name = "sram";
struct resource *res;
engine->pool = of_get_named_gen_pool(cesa->dev->of_node,
"marvell,crypto-srams",
idx);
if (engine->pool) {
engine->sram = gen_pool_dma_alloc(engine->pool,
cesa->sram_size,
&engine->sram_dma);
if (engine->sram)
return 0;
engine->pool = NULL;
return -ENOMEM;
}
if (cesa->caps->nengines > 1) {
if (!idx)
res_name = "sram0";
else
res_name = "sram1";
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
res_name);
if (!res || resource_size(res) < cesa->sram_size)
return -EINVAL;
engine->sram = devm_ioremap_resource(cesa->dev, res);
if (IS_ERR(engine->sram))
return PTR_ERR(engine->sram);
engine->sram_dma = phys_to_dma(cesa->dev,
(phys_addr_t)res->start);
return 0;
}
static void mv_cesa_put_sram(struct platform_device *pdev, int idx)
{
struct mv_cesa_dev *cesa = platform_get_drvdata(pdev);
struct mv_cesa_engine *engine = &cesa->engines[idx];
if (!engine->pool)
return;
gen_pool_free(engine->pool, (unsigned long)engine->sram,
cesa->sram_size);
}
static int mv_cesa_probe(struct platform_device *pdev)
{
const struct mv_cesa_caps *caps = NULL;
const struct mbus_dram_target_info *dram;
const struct of_device_id *match;
struct device *dev = &pdev->dev;
struct mv_cesa_dev *cesa;
struct mv_cesa_engine *engines;
struct resource *res;
int irq, ret, i;
u32 sram_size;
if (cesa_dev) {
dev_err(&pdev->dev, "Only one CESA device authorized\n");
return -EEXIST;
}
if (!dev->of_node)
return -ENOTSUPP;
match = of_match_node(mv_cesa_of_match_table, dev->of_node);
if (!match || !match->data)
return -ENOTSUPP;
caps = match->data;
cesa = devm_kzalloc(dev, sizeof(*cesa), GFP_KERNEL);
if (!cesa)
return -ENOMEM;
cesa->caps = caps;
cesa->dev = dev;
sram_size = CESA_SA_DEFAULT_SRAM_SIZE;
of_property_read_u32(cesa->dev->of_node, "marvell,crypto-sram-size",
&sram_size);
if (sram_size < CESA_SA_MIN_SRAM_SIZE)
sram_size = CESA_SA_MIN_SRAM_SIZE;
cesa->sram_size = sram_size;
cesa->engines = devm_kzalloc(dev, caps->nengines * sizeof(*engines),
GFP_KERNEL);
if (!cesa->engines)
return -ENOMEM;
spin_lock_init(&cesa->lock);
crypto_init_queue(&cesa->queue, 50);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
cesa->regs = devm_ioremap_resource(dev, res);
if (IS_ERR(cesa->regs))
return -ENOMEM;
dram = mv_mbus_dram_info_nooverlap();
platform_set_drvdata(pdev, cesa);
for (i = 0; i < caps->nengines; i++) {
struct mv_cesa_engine *engine = &cesa->engines[i];
char res_name[7];
engine->id = i;
spin_lock_init(&engine->lock);
ret = mv_cesa_get_sram(pdev, i);
if (ret)
goto err_cleanup;
irq = platform_get_irq(pdev, i);
if (irq < 0) {
ret = irq;
goto err_cleanup;
}
/*
* Not all platforms can gate the CESA clocks: do not complain
* if the clock does not exist.
*/
snprintf(res_name, sizeof(res_name), "cesa%d", i);
engine->clk = devm_clk_get(dev, res_name);
if (IS_ERR(engine->clk)) {
engine->clk = devm_clk_get(dev, NULL);
if (IS_ERR(engine->clk))
engine->clk = NULL;
}
snprintf(res_name, sizeof(res_name), "cesaz%d", i);
engine->zclk = devm_clk_get(dev, res_name);
if (IS_ERR(engine->zclk))
engine->zclk = NULL;
ret = clk_prepare_enable(engine->clk);
if (ret)
goto err_cleanup;
ret = clk_prepare_enable(engine->zclk);
if (ret)
goto err_cleanup;
engine->regs = cesa->regs + CESA_ENGINE_OFF(i);
writel(0, cesa->engines[i].regs + CESA_SA_INT_STATUS);
writel(CESA_SA_CFG_STOP_DIG_ERR,
cesa->engines[i].regs + CESA_SA_CFG);
writel(engine->sram_dma & CESA_SA_SRAM_MSK,
cesa->engines[i].regs + CESA_SA_DESC_P0);
ret = devm_request_threaded_irq(dev, irq, NULL, mv_cesa_int,
IRQF_ONESHOT,
dev_name(&pdev->dev),
&cesa->engines[i]);
if (ret)
goto err_cleanup;
}
cesa_dev = cesa;
ret = mv_cesa_add_algs(cesa);
if (ret) {
cesa_dev = NULL;
goto err_cleanup;
}
dev_info(dev, "CESA device successfully registered\n");
return 0;
err_cleanup:
for (i = 0; i < caps->nengines; i++) {
clk_disable_unprepare(cesa->engines[i].zclk);
clk_disable_unprepare(cesa->engines[i].clk);
mv_cesa_put_sram(pdev, i);
}
return ret;
}
static int mv_cesa_remove(struct platform_device *pdev)
{
struct mv_cesa_dev *cesa = platform_get_drvdata(pdev);
int i;
mv_cesa_remove_algs(cesa);
for (i = 0; i < cesa->caps->nengines; i++) {
clk_disable_unprepare(cesa->engines[i].zclk);
clk_disable_unprepare(cesa->engines[i].clk);
mv_cesa_put_sram(pdev, i);
}
return 0;
}
static struct platform_driver marvell_cesa = {
.probe = mv_cesa_probe,
.remove = mv_cesa_remove,
.driver = {
.owner = THIS_MODULE,
.name = "marvell-cesa",
.of_match_table = mv_cesa_of_match_table,
},
};
module_platform_driver(marvell_cesa);
MODULE_ALIAS("platform:mv_crypto");
MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
MODULE_AUTHOR("Arnaud Ebalard <arno@natisbad.org>");
MODULE_DESCRIPTION("Support for Marvell's cryptographic engine");
MODULE_LICENSE("GPL v2");

554
drivers/crypto/marvell/cesa.h Normal file
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@ -0,0 +1,554 @@
#ifndef __MARVELL_CESA_H__
#define __MARVELL_CESA_H__
#include <crypto/algapi.h>
#include <crypto/hash.h>
#include <crypto/internal/hash.h>
#include <linux/crypto.h>
#define CESA_ENGINE_OFF(i) (((i) * 0x2000))
#define CESA_TDMA_BYTE_CNT 0x800
#define CESA_TDMA_SRC_ADDR 0x810
#define CESA_TDMA_DST_ADDR 0x820
#define CESA_TDMA_NEXT_ADDR 0x830
#define CESA_TDMA_CONTROL 0x840
#define CESA_TDMA_DST_BURST GENMASK(2, 0)
#define CESA_TDMA_DST_BURST_32B 3
#define CESA_TDMA_DST_BURST_128B 4
#define CESA_TDMA_OUT_RD_EN BIT(4)
#define CESA_TDMA_SRC_BURST GENMASK(8, 6)
#define CESA_TDMA_SRC_BURST_32B (3 << 6)
#define CESA_TDMA_SRC_BURST_128B (4 << 6)
#define CESA_TDMA_CHAIN BIT(9)
#define CESA_TDMA_BYTE_SWAP BIT(11)
#define CESA_TDMA_NO_BYTE_SWAP BIT(11)
#define CESA_TDMA_EN BIT(12)
#define CESA_TDMA_FETCH_ND BIT(13)
#define CESA_TDMA_ACT BIT(14)
#define CESA_TDMA_CUR 0x870
#define CESA_TDMA_ERROR_CAUSE 0x8c8
#define CESA_TDMA_ERROR_MSK 0x8cc
#define CESA_TDMA_WINDOW_BASE(x) (((x) * 0x8) + 0xa00)
#define CESA_TDMA_WINDOW_CTRL(x) (((x) * 0x8) + 0xa04)
#define CESA_IVDIG(x) (0xdd00 + ((x) * 4) + \
(((x) < 5) ? 0 : 0x14))
#define CESA_SA_CMD 0xde00
#define CESA_SA_CMD_EN_CESA_SA_ACCL0 BIT(0)
#define CESA_SA_CMD_EN_CESA_SA_ACCL1 BIT(1)
#define CESA_SA_CMD_DISABLE_SEC BIT(2)
#define CESA_SA_DESC_P0 0xde04
#define CESA_SA_DESC_P1 0xde14
#define CESA_SA_CFG 0xde08
#define CESA_SA_CFG_STOP_DIG_ERR GENMASK(1, 0)
#define CESA_SA_CFG_DIG_ERR_CONT 0
#define CESA_SA_CFG_DIG_ERR_SKIP 1
#define CESA_SA_CFG_DIG_ERR_STOP 3
#define CESA_SA_CFG_CH0_W_IDMA BIT(7)
#define CESA_SA_CFG_CH1_W_IDMA BIT(8)
#define CESA_SA_CFG_ACT_CH0_IDMA BIT(9)
#define CESA_SA_CFG_ACT_CH1_IDMA BIT(10)
#define CESA_SA_CFG_MULTI_PKT BIT(11)
#define CESA_SA_CFG_PARA_DIS BIT(13)
#define CESA_SA_ACCEL_STATUS 0xde0c
#define CESA_SA_ST_ACT_0 BIT(0)
#define CESA_SA_ST_ACT_1 BIT(1)
/*
* CESA_SA_FPGA_INT_STATUS looks like a FPGA leftover and is documented only
* in Errata 4.12. It looks like that it was part of an IRQ-controller in FPGA
* and someone forgot to remove it while switching to the core and moving to
* CESA_SA_INT_STATUS.
*/
#define CESA_SA_FPGA_INT_STATUS 0xdd68
#define CESA_SA_INT_STATUS 0xde20
#define CESA_SA_INT_AUTH_DONE BIT(0)
#define CESA_SA_INT_DES_E_DONE BIT(1)
#define CESA_SA_INT_AES_E_DONE BIT(2)
#define CESA_SA_INT_AES_D_DONE BIT(3)
#define CESA_SA_INT_ENC_DONE BIT(4)
#define CESA_SA_INT_ACCEL0_DONE BIT(5)
#define CESA_SA_INT_ACCEL1_DONE BIT(6)
#define CESA_SA_INT_ACC0_IDMA_DONE BIT(7)
#define CESA_SA_INT_ACC1_IDMA_DONE BIT(8)
#define CESA_SA_INT_IDMA_DONE BIT(9)
#define CESA_SA_INT_IDMA_OWN_ERR BIT(10)
#define CESA_SA_INT_MSK 0xde24
#define CESA_SA_DESC_CFG_OP_MAC_ONLY 0
#define CESA_SA_DESC_CFG_OP_CRYPT_ONLY 1
#define CESA_SA_DESC_CFG_OP_MAC_CRYPT 2
#define CESA_SA_DESC_CFG_OP_CRYPT_MAC 3
#define CESA_SA_DESC_CFG_OP_MSK GENMASK(1, 0)
#define CESA_SA_DESC_CFG_MACM_SHA256 (1 << 4)
#define CESA_SA_DESC_CFG_MACM_HMAC_SHA256 (3 << 4)
#define CESA_SA_DESC_CFG_MACM_MD5 (4 << 4)
#define CESA_SA_DESC_CFG_MACM_SHA1 (5 << 4)
#define CESA_SA_DESC_CFG_MACM_HMAC_MD5 (6 << 4)
#define CESA_SA_DESC_CFG_MACM_HMAC_SHA1 (7 << 4)
#define CESA_SA_DESC_CFG_MACM_MSK GENMASK(6, 4)
#define CESA_SA_DESC_CFG_CRYPTM_DES (1 << 8)
#define CESA_SA_DESC_CFG_CRYPTM_3DES (2 << 8)
#define CESA_SA_DESC_CFG_CRYPTM_AES (3 << 8)
#define CESA_SA_DESC_CFG_CRYPTM_MSK GENMASK(9, 8)
#define CESA_SA_DESC_CFG_DIR_ENC (0 << 12)
#define CESA_SA_DESC_CFG_DIR_DEC (1 << 12)
#define CESA_SA_DESC_CFG_CRYPTCM_ECB (0 << 16)
#define CESA_SA_DESC_CFG_CRYPTCM_CBC (1 << 16)
#define CESA_SA_DESC_CFG_CRYPTCM_MSK BIT(16)
#define CESA_SA_DESC_CFG_3DES_EEE (0 << 20)
#define CESA_SA_DESC_CFG_3DES_EDE (1 << 20)
#define CESA_SA_DESC_CFG_AES_LEN_128 (0 << 24)
#define CESA_SA_DESC_CFG_AES_LEN_192 (1 << 24)
#define CESA_SA_DESC_CFG_AES_LEN_256 (2 << 24)
#define CESA_SA_DESC_CFG_AES_LEN_MSK GENMASK(25, 24)
#define CESA_SA_DESC_CFG_NOT_FRAG (0 << 30)
#define CESA_SA_DESC_CFG_FIRST_FRAG (1 << 30)
#define CESA_SA_DESC_CFG_LAST_FRAG (2 << 30)
#define CESA_SA_DESC_CFG_MID_FRAG (3 << 30)
#define CESA_SA_DESC_CFG_FRAG_MSK GENMASK(31, 30)
/*
* /-----------\ 0
* | ACCEL CFG | 4 * 8
* |-----------| 0x20
* | CRYPT KEY | 8 * 4
* |-----------| 0x40
* | IV IN | 4 * 4
* |-----------| 0x40 (inplace)
* | IV BUF | 4 * 4
* |-----------| 0x80
* | DATA IN | 16 * x (max ->max_req_size)
* |-----------| 0x80 (inplace operation)
* | DATA OUT | 16 * x (max ->max_req_size)
* \-----------/ SRAM size
*/
/*
* Hashing memory map:
* /-----------\ 0
* | ACCEL CFG | 4 * 8
* |-----------| 0x20
* | Inner IV | 8 * 4
* |-----------| 0x40
* | Outer IV | 8 * 4
* |-----------| 0x60
* | Output BUF| 8 * 4
* |-----------| 0x80
* | DATA IN | 64 * x (max ->max_req_size)
* \-----------/ SRAM size
*/
#define CESA_SA_CFG_SRAM_OFFSET 0x00
#define CESA_SA_DATA_SRAM_OFFSET 0x80
#define CESA_SA_CRYPT_KEY_SRAM_OFFSET 0x20
#define CESA_SA_CRYPT_IV_SRAM_OFFSET 0x40
#define CESA_SA_MAC_IIV_SRAM_OFFSET 0x20
#define CESA_SA_MAC_OIV_SRAM_OFFSET 0x40
#define CESA_SA_MAC_DIG_SRAM_OFFSET 0x60
#define CESA_SA_DESC_CRYPT_DATA(offset) \
cpu_to_le32((CESA_SA_DATA_SRAM_OFFSET + (offset)) | \
((CESA_SA_DATA_SRAM_OFFSET + (offset)) << 16))
#define CESA_SA_DESC_CRYPT_IV(offset) \
cpu_to_le32((CESA_SA_CRYPT_IV_SRAM_OFFSET + (offset)) | \
((CESA_SA_CRYPT_IV_SRAM_OFFSET + (offset)) << 16))
#define CESA_SA_DESC_CRYPT_KEY(offset) \
cpu_to_le32(CESA_SA_CRYPT_KEY_SRAM_OFFSET + (offset))
#define CESA_SA_DESC_MAC_DATA(offset) \
cpu_to_le32(CESA_SA_DATA_SRAM_OFFSET + (offset))
#define CESA_SA_DESC_MAC_DATA_MSK GENMASK(15, 0)
#define CESA_SA_DESC_MAC_TOTAL_LEN(total_len) cpu_to_le32((total_len) << 16)
#define CESA_SA_DESC_MAC_TOTAL_LEN_MSK GENMASK(31, 16)
#define CESA_SA_DESC_MAC_SRC_TOTAL_LEN_MAX 0xffff
#define CESA_SA_DESC_MAC_DIGEST(offset) \
cpu_to_le32(CESA_SA_MAC_DIG_SRAM_OFFSET + (offset))
#define CESA_SA_DESC_MAC_DIGEST_MSK GENMASK(15, 0)
#define CESA_SA_DESC_MAC_FRAG_LEN(frag_len) cpu_to_le32((frag_len) << 16)
#define CESA_SA_DESC_MAC_FRAG_LEN_MSK GENMASK(31, 16)
#define CESA_SA_DESC_MAC_IV(offset) \
cpu_to_le32((CESA_SA_MAC_IIV_SRAM_OFFSET + (offset)) | \
((CESA_SA_MAC_OIV_SRAM_OFFSET + (offset)) << 16))
#define CESA_SA_SRAM_SIZE 2048
#define CESA_SA_SRAM_PAYLOAD_SIZE (cesa_dev->sram_size - \
CESA_SA_DATA_SRAM_OFFSET)
#define CESA_SA_DEFAULT_SRAM_SIZE 2048
#define CESA_SA_MIN_SRAM_SIZE 1024
#define CESA_SA_SRAM_MSK (2048 - 1)
#define CESA_MAX_HASH_BLOCK_SIZE 64
#define CESA_HASH_BLOCK_SIZE_MSK (CESA_MAX_HASH_BLOCK_SIZE - 1)
/**
* struct mv_cesa_sec_accel_desc - security accelerator descriptor
* @config: engine config
* @enc_p: input and output data pointers for a cipher operation
* @enc_len: cipher operation length
* @enc_key_p: cipher key pointer
* @enc_iv: cipher IV pointers
* @mac_src_p: input pointer and total hash length
* @mac_digest: digest pointer and hash operation length
* @mac_iv: hmac IV pointers
*
* Structure passed to the CESA engine to describe the crypto operation
* to be executed.
*/
struct mv_cesa_sec_accel_desc {
u32 config;
u32 enc_p;
u32 enc_len;
u32 enc_key_p;
u32 enc_iv;
u32 mac_src_p;
u32 mac_digest;
u32 mac_iv;
};
/**
* struct mv_cesa_blkcipher_op_ctx - cipher operation context
* @key: cipher key
* @iv: cipher IV
*
* Context associated to a cipher operation.
*/
struct mv_cesa_blkcipher_op_ctx {
u32 key[8];
u32 iv[4];
};
/**
* struct mv_cesa_hash_op_ctx - hash or hmac operation context
* @key: cipher key
* @iv: cipher IV
*
* Context associated to an hash or hmac operation.
*/
struct mv_cesa_hash_op_ctx {
u32 iv[16];
u32 hash[8];
};
/**
* struct mv_cesa_op_ctx - crypto operation context
* @desc: CESA descriptor
* @ctx: context associated to the crypto operation
*
* Context associated to a crypto operation.
*/
struct mv_cesa_op_ctx {
struct mv_cesa_sec_accel_desc desc;
union {
struct mv_cesa_blkcipher_op_ctx blkcipher;
struct mv_cesa_hash_op_ctx hash;
} ctx;
};
struct mv_cesa_engine;
/**
* struct mv_cesa_caps - CESA device capabilities
* @engines: number of engines
* @cipher_algs: supported cipher algorithms
* @ncipher_algs: number of supported cipher algorithms
* @ahash_algs: supported hash algorithms
* @nahash_algs: number of supported hash algorithms
*
* Structure used to describe CESA device capabilities.
*/
struct mv_cesa_caps {
int nengines;
struct crypto_alg **cipher_algs;
int ncipher_algs;
struct ahash_alg **ahash_algs;
int nahash_algs;
};
/**
* struct mv_cesa_dev - CESA device
* @caps: device capabilities
* @regs: device registers
* @sram_size: usable SRAM size
* @lock: device lock
* @queue: crypto request queue
* @engines: array of engines
*
* Structure storing CESA device information.
*/
struct mv_cesa_dev {
const struct mv_cesa_caps *caps;
void __iomem *regs;
struct device *dev;
unsigned int sram_size;
spinlock_t lock;
struct crypto_queue queue;
struct mv_cesa_engine *engines;
};
/**
* struct mv_cesa_engine - CESA engine
* @id: engine id
* @regs: engine registers
* @sram: SRAM memory region
* @sram_dma: DMA address of the SRAM memory region
* @lock: engine lock
* @req: current crypto request
* @clk: engine clk
* @zclk: engine zclk
* @max_req_len: maximum chunk length (useful to create the TDMA chain)
* @int_mask: interrupt mask cache
* @pool: memory pool pointing to the memory region reserved in
* SRAM
*
* Structure storing CESA engine information.
*/
struct mv_cesa_engine {
int id;
void __iomem *regs;
void __iomem *sram;
dma_addr_t sram_dma;
spinlock_t lock;
struct crypto_async_request *req;
struct clk *clk;
struct clk *zclk;
size_t max_req_len;
u32 int_mask;
struct gen_pool *pool;
};
/**
* struct mv_cesa_req_ops - CESA request operations
* @prepare: prepare a request to be executed on the specified engine
* @process: process a request chunk result (should return 0 if the
* operation, -EINPROGRESS if it needs more steps or an error
* code)
* @step: launch the crypto operation on the next chunk
* @cleanup: cleanup the crypto request (release associated data)
*/
struct mv_cesa_req_ops {
void (*prepare)(struct crypto_async_request *req,
struct mv_cesa_engine *engine);
int (*process)(struct crypto_async_request *req, u32 status);
void (*step)(struct crypto_async_request *req);
void (*cleanup)(struct crypto_async_request *req);
};
/**
* struct mv_cesa_ctx - CESA operation context
* @ops: crypto operations
*
* Base context structure inherited by operation specific ones.
*/
struct mv_cesa_ctx {
const struct mv_cesa_req_ops *ops;
};
/**
* struct mv_cesa_hash_ctx - CESA hash operation context
* @base: base context structure
*
* Hash context structure.
*/
struct mv_cesa_hash_ctx {
struct mv_cesa_ctx base;
};
/**
* struct mv_cesa_hash_ctx - CESA hmac operation context
* @base: base context structure
* @iv: initialization vectors
*
* HMAC context structure.
*/
struct mv_cesa_hmac_ctx {
struct mv_cesa_ctx base;
u32 iv[16];
};
/**
* enum mv_cesa_req_type - request type definitions
* @CESA_STD_REQ: standard request
*/
enum mv_cesa_req_type {
CESA_STD_REQ,
};
/**
* struct mv_cesa_req - CESA request
* @type: request type
* @engine: engine associated with this request
*/
struct mv_cesa_req {
enum mv_cesa_req_type type;
struct mv_cesa_engine *engine;
};
/**
* struct mv_cesa_ablkcipher_std_req - cipher standard request
* @base: base information
* @op: operation context
* @offset: current operation offset
* @size: size of the crypto operation
*/
struct mv_cesa_ablkcipher_std_req {
struct mv_cesa_req base;
struct mv_cesa_op_ctx op;
unsigned int offset;
unsigned int size;
bool skip_ctx;
};
/**
* struct mv_cesa_ablkcipher_req - cipher request
* @req: type specific request information
* @src_nents: number of entries in the src sg list
* @dst_nents: number of entries in the dest sg list
*/
struct mv_cesa_ablkcipher_req {
union {
struct mv_cesa_req base;
struct mv_cesa_ablkcipher_std_req std;
} req;
int src_nents;
int dst_nents;
};
/**
* struct mv_cesa_ahash_std_req - standard hash request
* @base: base information
* @offset: current operation offset
*/
struct mv_cesa_ahash_std_req {
struct mv_cesa_req base;
unsigned int offset;
};
/**
* struct mv_cesa_ahash_req - hash request
* @req: type specific request information
* @cache: cache buffer
* @cache_ptr: write pointer in the cache buffer
* @len: hash total length
* @src_nents: number of entries in the scatterlist
* @last_req: define whether the current operation is the last one
* or not
* @state: hash state
*/
struct mv_cesa_ahash_req {
union {
struct mv_cesa_req base;
struct mv_cesa_ahash_std_req std;
} req;
struct mv_cesa_op_ctx op_tmpl;
u8 *cache;
unsigned int cache_ptr;
u64 len;
int src_nents;
bool last_req;
__be32 state[8];
};
/* CESA functions */
extern struct mv_cesa_dev *cesa_dev;
static inline void mv_cesa_update_op_cfg(struct mv_cesa_op_ctx *op,
u32 cfg, u32 mask)
{
op->desc.config &= cpu_to_le32(~mask);
op->desc.config |= cpu_to_le32(cfg);
}
static inline u32 mv_cesa_get_op_cfg(struct mv_cesa_op_ctx *op)
{
return le32_to_cpu(op->desc.config);
}
static inline void mv_cesa_set_op_cfg(struct mv_cesa_op_ctx *op, u32 cfg)
{
op->desc.config = cpu_to_le32(cfg);
}
static inline void mv_cesa_adjust_op(struct mv_cesa_engine *engine,
struct mv_cesa_op_ctx *op)
{
u32 offset = engine->sram_dma & CESA_SA_SRAM_MSK;
op->desc.enc_p = CESA_SA_DESC_CRYPT_DATA(offset);
op->desc.enc_key_p = CESA_SA_DESC_CRYPT_KEY(offset);
op->desc.enc_iv = CESA_SA_DESC_CRYPT_IV(offset);
op->desc.mac_src_p &= ~CESA_SA_DESC_MAC_DATA_MSK;
op->desc.mac_src_p |= CESA_SA_DESC_MAC_DATA(offset);
op->desc.mac_digest &= ~CESA_SA_DESC_MAC_DIGEST_MSK;
op->desc.mac_digest |= CESA_SA_DESC_MAC_DIGEST(offset);
op->desc.mac_iv = CESA_SA_DESC_MAC_IV(offset);
}
static inline void mv_cesa_set_crypt_op_len(struct mv_cesa_op_ctx *op, int len)
{
op->desc.enc_len = cpu_to_le32(len);
}
static inline void mv_cesa_set_mac_op_total_len(struct mv_cesa_op_ctx *op,
int len)
{
op->desc.mac_src_p &= ~CESA_SA_DESC_MAC_TOTAL_LEN_MSK;
op->desc.mac_src_p |= CESA_SA_DESC_MAC_TOTAL_LEN(len);
}
static inline void mv_cesa_set_mac_op_frag_len(struct mv_cesa_op_ctx *op,
int len)
{
op->desc.mac_digest &= ~CESA_SA_DESC_MAC_FRAG_LEN_MSK;
op->desc.mac_digest |= CESA_SA_DESC_MAC_FRAG_LEN(len);
}
static inline void mv_cesa_set_int_mask(struct mv_cesa_engine *engine,
u32 int_mask)
{
if (int_mask == engine->int_mask)
return;
writel(int_mask, engine->regs + CESA_SA_INT_MSK);
engine->int_mask = int_mask;
}
static inline u32 mv_cesa_get_int_mask(struct mv_cesa_engine *engine)
{
return engine->int_mask;
}
int mv_cesa_queue_req(struct crypto_async_request *req);
/* Algorithm definitions */
extern struct ahash_alg mv_sha1_alg;
extern struct ahash_alg mv_ahmac_sha1_alg;
extern struct crypto_alg mv_cesa_ecb_aes_alg;
extern struct crypto_alg mv_cesa_cbc_aes_alg;
#endif /* __MARVELL_CESA_H__ */

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/*
* Cipher algorithms supported by the CESA: DES, 3DES and AES.
*
* Author: Boris Brezillon <boris.brezillon@free-electrons.com>
* Author: Arnaud Ebalard <arno@natisbad.org>
*
* This work is based on an initial version written by
* Sebastian Andrzej Siewior < sebastian at breakpoint dot cc >
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include <crypto/aes.h>
#include "cesa.h"
struct mv_cesa_aes_ctx {
struct mv_cesa_ctx base;
struct crypto_aes_ctx aes;
};
static void mv_cesa_ablkcipher_std_step(struct ablkcipher_request *req)
{
struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
struct mv_cesa_ablkcipher_std_req *sreq = &creq->req.std;
struct mv_cesa_engine *engine = sreq->base.engine;
size_t len = min_t(size_t, req->nbytes - sreq->offset,
CESA_SA_SRAM_PAYLOAD_SIZE);
len = sg_pcopy_to_buffer(req->src, creq->src_nents,
engine->sram + CESA_SA_DATA_SRAM_OFFSET,
len, sreq->offset);
sreq->size = len;
mv_cesa_set_crypt_op_len(&sreq->op, len);
/* FIXME: only update enc_len field */
if (!sreq->skip_ctx) {
memcpy(engine->sram, &sreq->op, sizeof(sreq->op));
sreq->skip_ctx = true;
} else {
memcpy(engine->sram, &sreq->op, sizeof(sreq->op.desc));
}
mv_cesa_set_int_mask(engine, CESA_SA_INT_ACCEL0_DONE);
writel(CESA_SA_CFG_PARA_DIS, engine->regs + CESA_SA_CFG);
writel(CESA_SA_CMD_EN_CESA_SA_ACCL0, engine->regs + CESA_SA_CMD);
}
static int mv_cesa_ablkcipher_std_process(struct ablkcipher_request *req,
u32 status)
{
struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
struct mv_cesa_ablkcipher_std_req *sreq = &creq->req.std;
struct mv_cesa_engine *engine = sreq->base.engine;
size_t len;
len = sg_pcopy_from_buffer(req->dst, creq->dst_nents,
engine->sram + CESA_SA_DATA_SRAM_OFFSET,
sreq->size, sreq->offset);
sreq->offset += len;
if (sreq->offset < req->nbytes)
return -EINPROGRESS;
return 0;
}
static int mv_cesa_ablkcipher_process(struct crypto_async_request *req,
u32 status)
{
struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(ablkreq);
struct mv_cesa_ablkcipher_std_req *sreq = &creq->req.std;
struct mv_cesa_engine *engine = sreq->base.engine;
int ret;
ret = mv_cesa_ablkcipher_std_process(ablkreq, status);
if (ret)
return ret;
memcpy(ablkreq->info, engine->sram + CESA_SA_CRYPT_IV_SRAM_OFFSET,
crypto_ablkcipher_ivsize(crypto_ablkcipher_reqtfm(ablkreq)));
return 0;
}
static void mv_cesa_ablkcipher_step(struct crypto_async_request *req)
{
struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
mv_cesa_ablkcipher_std_step(ablkreq);
}
static inline void
mv_cesa_ablkcipher_std_prepare(struct ablkcipher_request *req)
{
struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
struct mv_cesa_ablkcipher_std_req *sreq = &creq->req.std;
struct mv_cesa_engine *engine = sreq->base.engine;
sreq->size = 0;
sreq->offset = 0;
mv_cesa_adjust_op(engine, &sreq->op);
memcpy(engine->sram, &sreq->op, sizeof(sreq->op));
}
static inline void mv_cesa_ablkcipher_prepare(struct crypto_async_request *req,
struct mv_cesa_engine *engine)
{
struct ablkcipher_request *ablkreq = ablkcipher_request_cast(req);
struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(ablkreq);
creq->req.base.engine = engine;
mv_cesa_ablkcipher_std_prepare(ablkreq);
}
static inline void
mv_cesa_ablkcipher_req_cleanup(struct crypto_async_request *req)
{
}
static const struct mv_cesa_req_ops mv_cesa_ablkcipher_req_ops = {
.step = mv_cesa_ablkcipher_step,
.process = mv_cesa_ablkcipher_process,
.prepare = mv_cesa_ablkcipher_prepare,
.cleanup = mv_cesa_ablkcipher_req_cleanup,
};
static int mv_cesa_ablkcipher_cra_init(struct crypto_tfm *tfm)
{
struct mv_cesa_aes_ctx *ctx = crypto_tfm_ctx(tfm);
ctx->base.ops = &mv_cesa_ablkcipher_req_ops;
tfm->crt_ablkcipher.reqsize = sizeof(struct mv_cesa_ablkcipher_req);
return 0;
}
static int mv_cesa_aes_setkey(struct crypto_ablkcipher *cipher, const u8 *key,
unsigned int len)
{
struct crypto_tfm *tfm = crypto_ablkcipher_tfm(cipher);
struct mv_cesa_aes_ctx *ctx = crypto_tfm_ctx(tfm);
int remaining;
int offset;
int ret;
int i;
ret = crypto_aes_expand_key(&ctx->aes, key, len);
if (ret) {
crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
return ret;
}
remaining = (ctx->aes.key_length - 16) / 4;
offset = ctx->aes.key_length + 24 - remaining;
for (i = 0; i < remaining; i++)
ctx->aes.key_dec[4 + i] =
cpu_to_le32(ctx->aes.key_enc[offset + i]);
return 0;
}
static inline int
mv_cesa_ablkcipher_std_req_init(struct ablkcipher_request *req,
const struct mv_cesa_op_ctx *op_templ)
{
struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
struct mv_cesa_ablkcipher_std_req *sreq = &creq->req.std;
sreq->base.type = CESA_STD_REQ;
sreq->op = *op_templ;
sreq->skip_ctx = false;
return 0;
}
static int mv_cesa_ablkcipher_req_init(struct ablkcipher_request *req,
struct mv_cesa_op_ctx *tmpl)
{
struct mv_cesa_ablkcipher_req *creq = ablkcipher_request_ctx(req);
struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req);
unsigned int blksize = crypto_ablkcipher_blocksize(tfm);
if (!IS_ALIGNED(req->nbytes, blksize))
return -EINVAL;
creq->src_nents = sg_nents_for_len(req->src, req->nbytes);
creq->dst_nents = sg_nents_for_len(req->dst, req->nbytes);
mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_OP_CRYPT_ONLY,
CESA_SA_DESC_CFG_OP_MSK);
return mv_cesa_ablkcipher_std_req_init(req, tmpl);
}
static int mv_cesa_aes_op(struct ablkcipher_request *req,
struct mv_cesa_op_ctx *tmpl)
{
struct mv_cesa_aes_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
int ret, i;
u32 *key;
u32 cfg;
cfg = CESA_SA_DESC_CFG_CRYPTM_AES;
if (mv_cesa_get_op_cfg(tmpl) & CESA_SA_DESC_CFG_DIR_DEC)
key = ctx->aes.key_dec;
else
key = ctx->aes.key_enc;
for (i = 0; i < ctx->aes.key_length / sizeof(u32); i++)
tmpl->ctx.blkcipher.key[i] = cpu_to_le32(key[i]);
if (ctx->aes.key_length == 24)
cfg |= CESA_SA_DESC_CFG_AES_LEN_192;
else if (ctx->aes.key_length == 32)
cfg |= CESA_SA_DESC_CFG_AES_LEN_256;
mv_cesa_update_op_cfg(tmpl, cfg,
CESA_SA_DESC_CFG_CRYPTM_MSK |
CESA_SA_DESC_CFG_AES_LEN_MSK);
ret = mv_cesa_ablkcipher_req_init(req, tmpl);
if (ret)
return ret;
return mv_cesa_queue_req(&req->base);
}
static int mv_cesa_ecb_aes_encrypt(struct ablkcipher_request *req)
{
struct mv_cesa_op_ctx tmpl;
mv_cesa_set_op_cfg(&tmpl,
CESA_SA_DESC_CFG_CRYPTCM_ECB |
CESA_SA_DESC_CFG_DIR_ENC);
return mv_cesa_aes_op(req, &tmpl);
}
static int mv_cesa_ecb_aes_decrypt(struct ablkcipher_request *req)
{
struct mv_cesa_op_ctx tmpl;
mv_cesa_set_op_cfg(&tmpl,
CESA_SA_DESC_CFG_CRYPTCM_ECB |
CESA_SA_DESC_CFG_DIR_DEC);
return mv_cesa_aes_op(req, &tmpl);
}
struct crypto_alg mv_cesa_ecb_aes_alg = {
.cra_name = "ecb(aes)",
.cra_driver_name = "mv-ecb-aes",
.cra_priority = 300,
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct mv_cesa_aes_ctx),
.cra_alignmask = 0,
.cra_type = &crypto_ablkcipher_type,
.cra_module = THIS_MODULE,
.cra_init = mv_cesa_ablkcipher_cra_init,
.cra_u = {
.ablkcipher = {
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.setkey = mv_cesa_aes_setkey,
.encrypt = mv_cesa_ecb_aes_encrypt,
.decrypt = mv_cesa_ecb_aes_decrypt,
},
},
};
static int mv_cesa_cbc_aes_op(struct ablkcipher_request *req,
struct mv_cesa_op_ctx *tmpl)
{
mv_cesa_update_op_cfg(tmpl, CESA_SA_DESC_CFG_CRYPTCM_CBC,
CESA_SA_DESC_CFG_CRYPTCM_MSK);
memcpy(tmpl->ctx.blkcipher.iv, req->info, AES_BLOCK_SIZE);
return mv_cesa_aes_op(req, tmpl);
}
static int mv_cesa_cbc_aes_encrypt(struct ablkcipher_request *req)
{
struct mv_cesa_op_ctx tmpl;
mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_ENC);
return mv_cesa_cbc_aes_op(req, &tmpl);
}
static int mv_cesa_cbc_aes_decrypt(struct ablkcipher_request *req)
{
struct mv_cesa_op_ctx tmpl;
mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_DIR_DEC);
return mv_cesa_cbc_aes_op(req, &tmpl);
}
struct crypto_alg mv_cesa_cbc_aes_alg = {
.cra_name = "cbc(aes)",
.cra_driver_name = "mv-cbc-aes",
.cra_priority = 300,
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
CRYPTO_ALG_KERN_DRIVER_ONLY | CRYPTO_ALG_ASYNC,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct mv_cesa_aes_ctx),
.cra_alignmask = 0,
.cra_type = &crypto_ablkcipher_type,
.cra_module = THIS_MODULE,
.cra_init = mv_cesa_ablkcipher_cra_init,
.cra_u = {
.ablkcipher = {
.min_keysize = AES_MIN_KEY_SIZE,
.max_keysize = AES_MAX_KEY_SIZE,
.ivsize = AES_BLOCK_SIZE,
.setkey = mv_cesa_aes_setkey,
.encrypt = mv_cesa_cbc_aes_encrypt,
.decrypt = mv_cesa_cbc_aes_decrypt,
},
},
};

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/*
* Hash algorithms supported by the CESA: MD5, SHA1 and SHA256.
*
* Author: Boris Brezillon <boris.brezillon@free-electrons.com>
* Author: Arnaud Ebalard <arno@natisbad.org>
*
* This work is based on an initial version written by
* Sebastian Andrzej Siewior < sebastian at breakpoint dot cc >
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include <crypto/sha.h>
#include "cesa.h"
static inline int mv_cesa_ahash_std_alloc_cache(struct mv_cesa_ahash_req *creq,
gfp_t flags)
{
creq->cache = kzalloc(CESA_MAX_HASH_BLOCK_SIZE, flags);
if (!creq->cache)
return -ENOMEM;
return 0;
}
static int mv_cesa_ahash_alloc_cache(struct ahash_request *req)
{
struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);
gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
GFP_KERNEL : GFP_ATOMIC;
if (creq->cache)
return 0;
return mv_cesa_ahash_std_alloc_cache(creq, flags);
}
static inline void mv_cesa_ahash_std_free_cache(struct mv_cesa_ahash_req *creq)
{
kfree(creq->cache);
}
static void mv_cesa_ahash_free_cache(struct mv_cesa_ahash_req *creq)
{
if (!creq->cache)
return;
mv_cesa_ahash_std_free_cache(creq);
creq->cache = NULL;
}
static void mv_cesa_ahash_last_cleanup(struct ahash_request *req)
{
struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);
mv_cesa_ahash_free_cache(creq);
}
static int mv_cesa_ahash_pad_len(struct mv_cesa_ahash_req *creq)
{
unsigned int index, padlen;
index = creq->len & CESA_HASH_BLOCK_SIZE_MSK;
padlen = (index < 56) ? (56 - index) : (64 + 56 - index);
return padlen;
}
static int mv_cesa_ahash_pad_req(struct mv_cesa_ahash_req *creq, u8 *buf)
{
__be64 bits = cpu_to_be64(creq->len << 3);
unsigned int index, padlen;
buf[0] = 0x80;
/* Pad out to 56 mod 64 */
index = creq->len & CESA_HASH_BLOCK_SIZE_MSK;
padlen = mv_cesa_ahash_pad_len(creq);
memset(buf + 1, 0, padlen - 1);
memcpy(buf + padlen, &bits, sizeof(bits));
return padlen + 8;
}
static void mv_cesa_ahash_std_step(struct ahash_request *req)
{
struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);
struct mv_cesa_ahash_std_req *sreq = &creq->req.std;
struct mv_cesa_engine *engine = sreq->base.engine;
struct mv_cesa_op_ctx *op;
unsigned int new_cache_ptr = 0;
u32 frag_mode;
size_t len;
if (creq->cache_ptr)
memcpy(engine->sram + CESA_SA_DATA_SRAM_OFFSET, creq->cache,
creq->cache_ptr);
len = min_t(size_t, req->nbytes + creq->cache_ptr - sreq->offset,
CESA_SA_SRAM_PAYLOAD_SIZE);
if (!creq->last_req) {
new_cache_ptr = len & CESA_HASH_BLOCK_SIZE_MSK;
len &= ~CESA_HASH_BLOCK_SIZE_MSK;
}
if (len - creq->cache_ptr)
sreq->offset += sg_pcopy_to_buffer(req->src, creq->src_nents,
engine->sram +
CESA_SA_DATA_SRAM_OFFSET +
creq->cache_ptr,
len - creq->cache_ptr,
sreq->offset);
op = &creq->op_tmpl;
frag_mode = mv_cesa_get_op_cfg(op) & CESA_SA_DESC_CFG_FRAG_MSK;
if (creq->last_req && sreq->offset == req->nbytes &&
creq->len <= CESA_SA_DESC_MAC_SRC_TOTAL_LEN_MAX) {
if (frag_mode == CESA_SA_DESC_CFG_FIRST_FRAG)
frag_mode = CESA_SA_DESC_CFG_NOT_FRAG;
else if (frag_mode == CESA_SA_DESC_CFG_MID_FRAG)
frag_mode = CESA_SA_DESC_CFG_LAST_FRAG;
}
if (frag_mode == CESA_SA_DESC_CFG_NOT_FRAG ||
frag_mode == CESA_SA_DESC_CFG_LAST_FRAG) {
if (len &&
creq->len <= CESA_SA_DESC_MAC_SRC_TOTAL_LEN_MAX) {
mv_cesa_set_mac_op_total_len(op, creq->len);
} else {
int trailerlen = mv_cesa_ahash_pad_len(creq) + 8;
if (len + trailerlen > CESA_SA_SRAM_PAYLOAD_SIZE) {
len &= CESA_HASH_BLOCK_SIZE_MSK;
new_cache_ptr = 64 - trailerlen;
memcpy(creq->cache,
engine->sram +
CESA_SA_DATA_SRAM_OFFSET + len,
new_cache_ptr);
} else {
len += mv_cesa_ahash_pad_req(creq,
engine->sram + len +
CESA_SA_DATA_SRAM_OFFSET);
}
if (frag_mode == CESA_SA_DESC_CFG_LAST_FRAG)
frag_mode = CESA_SA_DESC_CFG_MID_FRAG;
else
frag_mode = CESA_SA_DESC_CFG_FIRST_FRAG;
}
}
mv_cesa_set_mac_op_frag_len(op, len);
mv_cesa_update_op_cfg(op, frag_mode, CESA_SA_DESC_CFG_FRAG_MSK);
/* FIXME: only update enc_len field */
memcpy(engine->sram, op, sizeof(*op));
if (frag_mode == CESA_SA_DESC_CFG_FIRST_FRAG)
mv_cesa_update_op_cfg(op, CESA_SA_DESC_CFG_MID_FRAG,
CESA_SA_DESC_CFG_FRAG_MSK);
creq->cache_ptr = new_cache_ptr;
mv_cesa_set_int_mask(engine, CESA_SA_INT_ACCEL0_DONE);
writel(CESA_SA_CFG_PARA_DIS, engine->regs + CESA_SA_CFG);
writel(CESA_SA_CMD_EN_CESA_SA_ACCL0, engine->regs + CESA_SA_CMD);
}
static int mv_cesa_ahash_std_process(struct ahash_request *req, u32 status)
{
struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);
struct mv_cesa_ahash_std_req *sreq = &creq->req.std;
if (sreq->offset < (req->nbytes - creq->cache_ptr))
return -EINPROGRESS;
return 0;
}
static void mv_cesa_ahash_std_prepare(struct ahash_request *req)
{
struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);
struct mv_cesa_ahash_std_req *sreq = &creq->req.std;
struct mv_cesa_engine *engine = sreq->base.engine;
sreq->offset = 0;
mv_cesa_adjust_op(engine, &creq->op_tmpl);
memcpy(engine->sram, &creq->op_tmpl, sizeof(creq->op_tmpl));
}
static void mv_cesa_ahash_step(struct crypto_async_request *req)
{
struct ahash_request *ahashreq = ahash_request_cast(req);
mv_cesa_ahash_std_step(ahashreq);
}
static int mv_cesa_ahash_process(struct crypto_async_request *req, u32 status)
{
struct ahash_request *ahashreq = ahash_request_cast(req);
struct mv_cesa_ahash_req *creq = ahash_request_ctx(ahashreq);
struct mv_cesa_engine *engine = creq->req.base.engine;
unsigned int digsize;
int ret, i;
ret = mv_cesa_ahash_std_process(ahashreq, status);
if (ret == -EINPROGRESS)
return ret;
digsize = crypto_ahash_digestsize(crypto_ahash_reqtfm(ahashreq));
for (i = 0; i < digsize / 4; i++)
creq->state[i] = readl(engine->regs + CESA_IVDIG(i));
if (creq->cache_ptr)
sg_pcopy_to_buffer(ahashreq->src, creq->src_nents,
creq->cache,
creq->cache_ptr,
ahashreq->nbytes - creq->cache_ptr);
if (creq->last_req) {
for (i = 0; i < digsize / 4; i++)
creq->state[i] = cpu_to_be32(creq->state[i]);
memcpy(ahashreq->result, creq->state, digsize);
}
return ret;
}
static void mv_cesa_ahash_prepare(struct crypto_async_request *req,
struct mv_cesa_engine *engine)
{
struct ahash_request *ahashreq = ahash_request_cast(req);
struct mv_cesa_ahash_req *creq = ahash_request_ctx(ahashreq);
unsigned int digsize;
int i;
creq->req.base.engine = engine;
mv_cesa_ahash_std_prepare(ahashreq);
digsize = crypto_ahash_digestsize(crypto_ahash_reqtfm(ahashreq));
for (i = 0; i < digsize / 4; i++)
writel(creq->state[i],
engine->regs + CESA_IVDIG(i));
}
static void mv_cesa_ahash_req_cleanup(struct crypto_async_request *req)
{
struct ahash_request *ahashreq = ahash_request_cast(req);
struct mv_cesa_ahash_req *creq = ahash_request_ctx(ahashreq);
if (creq->last_req)
mv_cesa_ahash_last_cleanup(ahashreq);
}
static const struct mv_cesa_req_ops mv_cesa_ahash_req_ops = {
.step = mv_cesa_ahash_step,
.process = mv_cesa_ahash_process,
.prepare = mv_cesa_ahash_prepare,
.cleanup = mv_cesa_ahash_req_cleanup,
};
static int mv_cesa_ahash_init(struct ahash_request *req,
struct mv_cesa_op_ctx *tmpl)
{
struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);
memset(creq, 0, sizeof(*creq));
mv_cesa_update_op_cfg(tmpl,
CESA_SA_DESC_CFG_OP_MAC_ONLY |
CESA_SA_DESC_CFG_FIRST_FRAG,
CESA_SA_DESC_CFG_OP_MSK |
CESA_SA_DESC_CFG_FRAG_MSK);
mv_cesa_set_mac_op_total_len(tmpl, 0);
mv_cesa_set_mac_op_frag_len(tmpl, 0);
creq->op_tmpl = *tmpl;
creq->len = 0;
return 0;
}
static inline int mv_cesa_ahash_cra_init(struct crypto_tfm *tfm)
{
struct mv_cesa_hash_ctx *ctx = crypto_tfm_ctx(tfm);
ctx->base.ops = &mv_cesa_ahash_req_ops;
crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
sizeof(struct mv_cesa_ahash_req));
return 0;
}
static int mv_cesa_ahash_cache_req(struct ahash_request *req, bool *cached)
{
struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);
int ret;
if (((creq->cache_ptr + req->nbytes) & CESA_HASH_BLOCK_SIZE_MSK) &&
!creq->last_req) {
ret = mv_cesa_ahash_alloc_cache(req);
if (ret)
return ret;
}
if (creq->cache_ptr + req->nbytes < 64 && !creq->last_req) {
*cached = true;
if (!req->nbytes)
return 0;
sg_pcopy_to_buffer(req->src, creq->src_nents,
creq->cache + creq->cache_ptr,
req->nbytes, 0);
creq->cache_ptr += req->nbytes;
}
return 0;
}
static int mv_cesa_ahash_req_init(struct ahash_request *req, bool *cached)
{
struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);
creq->req.base.type = CESA_STD_REQ;
creq->src_nents = sg_nents_for_len(req->src, req->nbytes);
return mv_cesa_ahash_cache_req(req, cached);
}
static int mv_cesa_ahash_update(struct ahash_request *req)
{
struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);
bool cached = false;
int ret;
creq->len += req->nbytes;
ret = mv_cesa_ahash_req_init(req, &cached);
if (ret)
return ret;
if (cached)
return 0;
return mv_cesa_queue_req(&req->base);
}
static int mv_cesa_ahash_final(struct ahash_request *req)
{
struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);
struct mv_cesa_op_ctx *tmpl = &creq->op_tmpl;
bool cached = false;
int ret;
mv_cesa_set_mac_op_total_len(tmpl, creq->len);
creq->last_req = true;
req->nbytes = 0;
ret = mv_cesa_ahash_req_init(req, &cached);
if (ret)
return ret;
if (cached)
return 0;
return mv_cesa_queue_req(&req->base);
}
static int mv_cesa_ahash_finup(struct ahash_request *req)
{
struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);
struct mv_cesa_op_ctx *tmpl = &creq->op_tmpl;
bool cached = false;
int ret;
creq->len += req->nbytes;
mv_cesa_set_mac_op_total_len(tmpl, creq->len);
creq->last_req = true;
ret = mv_cesa_ahash_req_init(req, &cached);
if (ret)
return ret;
if (cached)
return 0;
return mv_cesa_queue_req(&req->base);
}
static int mv_cesa_sha1_init(struct ahash_request *req)
{
struct mv_cesa_op_ctx tmpl;
mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_MACM_SHA1);
mv_cesa_ahash_init(req, &tmpl);
return 0;
}
static int mv_cesa_sha1_export(struct ahash_request *req, void *out)
{
struct sha1_state *out_state = out;
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);
unsigned int digsize = crypto_ahash_digestsize(ahash);
out_state->count = creq->len;
memcpy(out_state->state, creq->state, digsize);
memset(out_state->buffer, 0, sizeof(out_state->buffer));
if (creq->cache)
memcpy(out_state->buffer, creq->cache, creq->cache_ptr);
return 0;
}
static int mv_cesa_sha1_import(struct ahash_request *req, const void *in)
{
const struct sha1_state *in_state = in;
struct crypto_ahash *ahash = crypto_ahash_reqtfm(req);
struct mv_cesa_ahash_req *creq = ahash_request_ctx(req);
unsigned int digsize = crypto_ahash_digestsize(ahash);
unsigned int cache_ptr;
int ret;
creq->len = in_state->count;
memcpy(creq->state, in_state->state, digsize);
creq->cache_ptr = 0;
cache_ptr = creq->len % SHA1_BLOCK_SIZE;
if (!cache_ptr)
return 0;
ret = mv_cesa_ahash_alloc_cache(req);
if (ret)
return ret;
memcpy(creq->cache, in_state->buffer, cache_ptr);
creq->cache_ptr = cache_ptr;
return 0;
}
static int mv_cesa_sha1_digest(struct ahash_request *req)
{
int ret;
ret = mv_cesa_sha1_init(req);
if (ret)
return ret;
return mv_cesa_ahash_finup(req);
}
struct ahash_alg mv_sha1_alg = {
.init = mv_cesa_sha1_init,
.update = mv_cesa_ahash_update,
.final = mv_cesa_ahash_final,
.finup = mv_cesa_ahash_finup,
.digest = mv_cesa_sha1_digest,
.export = mv_cesa_sha1_export,
.import = mv_cesa_sha1_import,
.halg = {
.digestsize = SHA1_DIGEST_SIZE,
.base = {
.cra_name = "sha1",
.cra_driver_name = "mv-sha1",
.cra_priority = 300,
.cra_flags = CRYPTO_ALG_ASYNC |
CRYPTO_ALG_KERN_DRIVER_ONLY,
.cra_blocksize = SHA1_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct mv_cesa_hash_ctx),
.cra_init = mv_cesa_ahash_cra_init,
.cra_module = THIS_MODULE,
}
}
};
struct mv_cesa_ahash_result {
struct completion completion;
int error;
};
static void mv_cesa_hmac_ahash_complete(struct crypto_async_request *req,
int error)
{
struct mv_cesa_ahash_result *result = req->data;
if (error == -EINPROGRESS)
return;
result->error = error;
complete(&result->completion);
}
static int mv_cesa_ahmac_iv_state_init(struct ahash_request *req, u8 *pad,
void *state, unsigned int blocksize)
{
struct mv_cesa_ahash_result result;
struct scatterlist sg;
int ret;
ahash_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
mv_cesa_hmac_ahash_complete, &result);
sg_init_one(&sg, pad, blocksize);
ahash_request_set_crypt(req, &sg, pad, blocksize);
init_completion(&result.completion);
ret = crypto_ahash_init(req);
if (ret)
return ret;
ret = crypto_ahash_update(req);
if (ret && ret != -EINPROGRESS)
return ret;
wait_for_completion_interruptible(&result.completion);
if (result.error)
return result.error;
ret = crypto_ahash_export(req, state);
if (ret)
return ret;
return 0;
}
static int mv_cesa_ahmac_pad_init(struct ahash_request *req,
const u8 *key, unsigned int keylen,
u8 *ipad, u8 *opad,
unsigned int blocksize)
{
struct mv_cesa_ahash_result result;
struct scatterlist sg;
int ret;
int i;
if (keylen <= blocksize) {
memcpy(ipad, key, keylen);
} else {
u8 *keydup = kmemdup(key, keylen, GFP_KERNEL);
if (!keydup)
return -ENOMEM;
ahash_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
mv_cesa_hmac_ahash_complete,
&result);
sg_init_one(&sg, keydup, keylen);
ahash_request_set_crypt(req, &sg, ipad, keylen);
init_completion(&result.completion);
ret = crypto_ahash_digest(req);
if (ret == -EINPROGRESS) {
wait_for_completion_interruptible(&result.completion);
ret = result.error;
}
/* Set the memory region to 0 to avoid any leak. */
memset(keydup, 0, keylen);
kfree(keydup);
if (ret)
return ret;
keylen = crypto_ahash_digestsize(crypto_ahash_reqtfm(req));
}
memset(ipad + keylen, 0, blocksize - keylen);
memcpy(opad, ipad, blocksize);
for (i = 0; i < blocksize; i++) {
ipad[i] ^= 0x36;
opad[i] ^= 0x5c;
}
return 0;
}
static int mv_cesa_ahmac_setkey(const char *hash_alg_name,
const u8 *key, unsigned int keylen,
void *istate, void *ostate)
{
struct ahash_request *req;
struct crypto_ahash *tfm;
unsigned int blocksize;
u8 *ipad = NULL;
u8 *opad;
int ret;
tfm = crypto_alloc_ahash(hash_alg_name, CRYPTO_ALG_TYPE_AHASH,
CRYPTO_ALG_TYPE_AHASH_MASK);
if (IS_ERR(tfm))
return PTR_ERR(tfm);
req = ahash_request_alloc(tfm, GFP_KERNEL);
if (!req) {
ret = -ENOMEM;
goto free_ahash;
}
crypto_ahash_clear_flags(tfm, ~0);
blocksize = crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
ipad = kzalloc(2 * blocksize, GFP_KERNEL);
if (!ipad) {
ret = -ENOMEM;
goto free_req;
}
opad = ipad + blocksize;
ret = mv_cesa_ahmac_pad_init(req, key, keylen, ipad, opad, blocksize);
if (ret)
goto free_ipad;
ret = mv_cesa_ahmac_iv_state_init(req, ipad, istate, blocksize);
if (ret)
goto free_ipad;
ret = mv_cesa_ahmac_iv_state_init(req, opad, ostate, blocksize);
free_ipad:
kfree(ipad);
free_req:
ahash_request_free(req);
free_ahash:
crypto_free_ahash(tfm);
return ret;
}
static int mv_cesa_ahmac_cra_init(struct crypto_tfm *tfm)
{
struct mv_cesa_hmac_ctx *ctx = crypto_tfm_ctx(tfm);
ctx->base.ops = &mv_cesa_ahash_req_ops;
crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
sizeof(struct mv_cesa_ahash_req));
return 0;
}
static int mv_cesa_ahmac_sha1_init(struct ahash_request *req)
{
struct mv_cesa_hmac_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
struct mv_cesa_op_ctx tmpl;
mv_cesa_set_op_cfg(&tmpl, CESA_SA_DESC_CFG_MACM_HMAC_SHA1);
memcpy(tmpl.ctx.hash.iv, ctx->iv, sizeof(ctx->iv));
mv_cesa_ahash_init(req, &tmpl);
return 0;
}
static int mv_cesa_ahmac_sha1_setkey(struct crypto_ahash *tfm, const u8 *key,
unsigned int keylen)
{
struct mv_cesa_hmac_ctx *ctx = crypto_tfm_ctx(crypto_ahash_tfm(tfm));
struct sha1_state istate, ostate;
int ret, i;
ret = mv_cesa_ahmac_setkey("mv-sha1", key, keylen, &istate, &ostate);
if (ret)
return ret;
for (i = 0; i < ARRAY_SIZE(istate.state); i++)
ctx->iv[i] = be32_to_cpu(istate.state[i]);
for (i = 0; i < ARRAY_SIZE(ostate.state); i++)
ctx->iv[i + 8] = be32_to_cpu(ostate.state[i]);
return 0;
}
static int mv_cesa_ahmac_sha1_digest(struct ahash_request *req)
{
int ret;
ret = mv_cesa_ahmac_sha1_init(req);
if (ret)
return ret;
return mv_cesa_ahash_finup(req);
}
struct ahash_alg mv_ahmac_sha1_alg = {
.init = mv_cesa_ahmac_sha1_init,
.update = mv_cesa_ahash_update,
.final = mv_cesa_ahash_final,
.finup = mv_cesa_ahash_finup,
.digest = mv_cesa_ahmac_sha1_digest,
.setkey = mv_cesa_ahmac_sha1_setkey,
.export = mv_cesa_sha1_export,
.import = mv_cesa_sha1_import,
.halg = {
.digestsize = SHA1_DIGEST_SIZE,
.statesize = sizeof(struct sha1_state),
.base = {
.cra_name = "hmac(sha1)",
.cra_driver_name = "mv-hmac-sha1",
.cra_priority = 300,
.cra_flags = CRYPTO_ALG_ASYNC |
CRYPTO_ALG_KERN_DRIVER_ONLY,
.cra_blocksize = SHA1_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct mv_cesa_hmac_ctx),
.cra_init = mv_cesa_ahmac_cra_init,
.cra_module = THIS_MODULE,
}
}
};