mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
crypto: starfive - Add crypto engine support
Adding device probe and DMA init for StarFive cryptographic module. Co-developed-by: Huan Feng <huan.feng@starfivetech.com> Signed-off-by: Huan Feng <huan.feng@starfivetech.com> Signed-off-by: Jia Jie Ho <jiajie.ho@starfivetech.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
parent
4b66c6aa28
commit
42ef0e944b
7 changed files with 294 additions and 0 deletions
|
@ -20095,6 +20095,13 @@ F: Documentation/devicetree/bindings/clock/starfive,jh71*.yaml
|
|||
F: drivers/clk/starfive/clk-starfive-jh71*
|
||||
F: include/dt-bindings/clock/starfive?jh71*.h
|
||||
|
||||
STARFIVE CRYPTO DRIVER
|
||||
M: Jia Jie Ho <jiajie.ho@starfivetech.com>
|
||||
M: William Qiu <william.qiu@starfivetech.com>
|
||||
S: Supported
|
||||
F: Documentation/devicetree/bindings/crypto/starfive*
|
||||
F: drivers/crypto/starfive/
|
||||
|
||||
STARFIVE JH71X0 PINCTRL DRIVERS
|
||||
M: Emil Renner Berthing <kernel@esmil.dk>
|
||||
M: Jianlong Huang <jianlong.huang@starfivetech.com>
|
||||
|
|
|
@ -807,5 +807,6 @@ config CRYPTO_DEV_SA2UL
|
|||
acceleration for cryptographic algorithms on these devices.
|
||||
|
||||
source "drivers/crypto/aspeed/Kconfig"
|
||||
source "drivers/crypto/starfive/Kconfig"
|
||||
|
||||
endif # CRYPTO_HW
|
||||
|
|
|
@ -50,3 +50,4 @@ obj-y += xilinx/
|
|||
obj-y += hisilicon/
|
||||
obj-$(CONFIG_CRYPTO_DEV_AMLOGIC_GXL) += amlogic/
|
||||
obj-y += intel/
|
||||
obj-y += starfive/
|
||||
|
|
17
drivers/crypto/starfive/Kconfig
Normal file
17
drivers/crypto/starfive/Kconfig
Normal file
|
@ -0,0 +1,17 @@
|
|||
#
|
||||
# StarFive crypto drivers configuration
|
||||
#
|
||||
|
||||
config CRYPTO_DEV_JH7110
|
||||
tristate "StarFive JH7110 cryptographic engine driver"
|
||||
depends on SOC_STARFIVE || COMPILE_TEST
|
||||
select CRYPTO_ENGINE
|
||||
select ARM_AMBA
|
||||
select DMADEVICES
|
||||
select AMBA_PL08X
|
||||
help
|
||||
Support for StarFive JH7110 crypto hardware acceleration engine.
|
||||
This module provides acceleration for public key algo,
|
||||
skciphers, AEAD and hash functions.
|
||||
|
||||
If you choose 'M' here, this module will be called jh7110-crypto.
|
4
drivers/crypto/starfive/Makefile
Normal file
4
drivers/crypto/starfive/Makefile
Normal file
|
@ -0,0 +1,4 @@
|
|||
# SPDX-License-Identifier: GPL-2.0
|
||||
|
||||
obj-$(CONFIG_CRYPTO_DEV_JH7110) += jh7110-crypto.o
|
||||
jh7110-crypto-objs := jh7110-cryp.o
|
201
drivers/crypto/starfive/jh7110-cryp.c
Normal file
201
drivers/crypto/starfive/jh7110-cryp.c
Normal file
|
@ -0,0 +1,201 @@
|
|||
// SPDX-License-Identifier: GPL-2.0
|
||||
/*
|
||||
* Cryptographic API.
|
||||
*
|
||||
* Support for StarFive hardware cryptographic engine.
|
||||
* Copyright (c) 2022 StarFive Technology
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/clk.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/iopoll.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/of_device.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/pm_runtime.h>
|
||||
#include <linux/reset.h>
|
||||
|
||||
#include "jh7110-cryp.h"
|
||||
|
||||
#define DRIVER_NAME "jh7110-crypto"
|
||||
|
||||
struct starfive_dev_list {
|
||||
struct list_head dev_list;
|
||||
spinlock_t lock; /* protect dev_list */
|
||||
};
|
||||
|
||||
static struct starfive_dev_list dev_list = {
|
||||
.dev_list = LIST_HEAD_INIT(dev_list.dev_list),
|
||||
.lock = __SPIN_LOCK_UNLOCKED(dev_list.lock),
|
||||
};
|
||||
|
||||
struct starfive_cryp_dev *starfive_cryp_find_dev(struct starfive_cryp_ctx *ctx)
|
||||
{
|
||||
struct starfive_cryp_dev *cryp = NULL, *tmp;
|
||||
|
||||
spin_lock_bh(&dev_list.lock);
|
||||
if (!ctx->cryp) {
|
||||
list_for_each_entry(tmp, &dev_list.dev_list, list) {
|
||||
cryp = tmp;
|
||||
break;
|
||||
}
|
||||
ctx->cryp = cryp;
|
||||
} else {
|
||||
cryp = ctx->cryp;
|
||||
}
|
||||
|
||||
spin_unlock_bh(&dev_list.lock);
|
||||
|
||||
return cryp;
|
||||
}
|
||||
|
||||
static int starfive_dma_init(struct starfive_cryp_dev *cryp)
|
||||
{
|
||||
dma_cap_mask_t mask;
|
||||
|
||||
dma_cap_zero(mask);
|
||||
dma_cap_set(DMA_SLAVE, mask);
|
||||
|
||||
cryp->tx = dma_request_chan(cryp->dev, "tx");
|
||||
if (IS_ERR(cryp->tx))
|
||||
return dev_err_probe(cryp->dev, PTR_ERR(cryp->tx),
|
||||
"Error requesting tx dma channel.\n");
|
||||
|
||||
cryp->rx = dma_request_chan(cryp->dev, "rx");
|
||||
if (IS_ERR(cryp->rx)) {
|
||||
dma_release_channel(cryp->tx);
|
||||
return dev_err_probe(cryp->dev, PTR_ERR(cryp->rx),
|
||||
"Error requesting rx dma channel.\n");
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void starfive_dma_cleanup(struct starfive_cryp_dev *cryp)
|
||||
{
|
||||
dma_release_channel(cryp->tx);
|
||||
dma_release_channel(cryp->rx);
|
||||
}
|
||||
|
||||
static int starfive_cryp_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct starfive_cryp_dev *cryp;
|
||||
struct resource *res;
|
||||
int ret;
|
||||
|
||||
cryp = devm_kzalloc(&pdev->dev, sizeof(*cryp), GFP_KERNEL);
|
||||
if (!cryp)
|
||||
return -ENOMEM;
|
||||
|
||||
platform_set_drvdata(pdev, cryp);
|
||||
cryp->dev = &pdev->dev;
|
||||
|
||||
cryp->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
|
||||
if (IS_ERR(cryp->base))
|
||||
return dev_err_probe(&pdev->dev, PTR_ERR(cryp->base),
|
||||
"Error remapping memory for platform device\n");
|
||||
|
||||
cryp->phys_base = res->start;
|
||||
cryp->dma_maxburst = 32;
|
||||
|
||||
cryp->hclk = devm_clk_get(&pdev->dev, "hclk");
|
||||
if (IS_ERR(cryp->hclk))
|
||||
return dev_err_probe(&pdev->dev, PTR_ERR(cryp->hclk),
|
||||
"Error getting hardware reference clock\n");
|
||||
|
||||
cryp->ahb = devm_clk_get(&pdev->dev, "ahb");
|
||||
if (IS_ERR(cryp->ahb))
|
||||
return dev_err_probe(&pdev->dev, PTR_ERR(cryp->ahb),
|
||||
"Error getting ahb reference clock\n");
|
||||
|
||||
cryp->rst = devm_reset_control_get_shared(cryp->dev, NULL);
|
||||
if (IS_ERR(cryp->rst))
|
||||
return dev_err_probe(&pdev->dev, PTR_ERR(cryp->rst),
|
||||
"Error getting hardware reset line\n");
|
||||
|
||||
clk_prepare_enable(cryp->hclk);
|
||||
clk_prepare_enable(cryp->ahb);
|
||||
reset_control_deassert(cryp->rst);
|
||||
|
||||
spin_lock(&dev_list.lock);
|
||||
list_add(&cryp->list, &dev_list.dev_list);
|
||||
spin_unlock(&dev_list.lock);
|
||||
|
||||
ret = starfive_dma_init(cryp);
|
||||
if (ret) {
|
||||
if (ret == -EPROBE_DEFER)
|
||||
goto err_probe_defer;
|
||||
else
|
||||
goto err_dma_init;
|
||||
}
|
||||
|
||||
/* Initialize crypto engine */
|
||||
cryp->engine = crypto_engine_alloc_init(&pdev->dev, 1);
|
||||
if (!cryp->engine) {
|
||||
ret = -ENOMEM;
|
||||
goto err_engine;
|
||||
}
|
||||
|
||||
ret = crypto_engine_start(cryp->engine);
|
||||
if (ret)
|
||||
goto err_engine_start;
|
||||
|
||||
return 0;
|
||||
|
||||
err_engine_start:
|
||||
crypto_engine_exit(cryp->engine);
|
||||
err_engine:
|
||||
starfive_dma_cleanup(cryp);
|
||||
err_dma_init:
|
||||
spin_lock(&dev_list.lock);
|
||||
list_del(&cryp->list);
|
||||
spin_unlock(&dev_list.lock);
|
||||
|
||||
clk_disable_unprepare(cryp->hclk);
|
||||
clk_disable_unprepare(cryp->ahb);
|
||||
reset_control_assert(cryp->rst);
|
||||
err_probe_defer:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int starfive_cryp_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct starfive_cryp_dev *cryp = platform_get_drvdata(pdev);
|
||||
|
||||
crypto_engine_stop(cryp->engine);
|
||||
crypto_engine_exit(cryp->engine);
|
||||
|
||||
starfive_dma_cleanup(cryp);
|
||||
|
||||
spin_lock(&dev_list.lock);
|
||||
list_del(&cryp->list);
|
||||
spin_unlock(&dev_list.lock);
|
||||
|
||||
clk_disable_unprepare(cryp->hclk);
|
||||
clk_disable_unprepare(cryp->ahb);
|
||||
reset_control_assert(cryp->rst);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id starfive_dt_ids[] __maybe_unused = {
|
||||
{ .compatible = "starfive,jh7110-crypto", .data = NULL},
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, starfive_dt_ids);
|
||||
|
||||
static struct platform_driver starfive_cryp_driver = {
|
||||
.probe = starfive_cryp_probe,
|
||||
.remove = starfive_cryp_remove,
|
||||
.driver = {
|
||||
.name = DRIVER_NAME,
|
||||
.of_match_table = starfive_dt_ids,
|
||||
},
|
||||
};
|
||||
|
||||
module_platform_driver(starfive_cryp_driver);
|
||||
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("StarFive JH7110 Cryptographic Module");
|
63
drivers/crypto/starfive/jh7110-cryp.h
Normal file
63
drivers/crypto/starfive/jh7110-cryp.h
Normal file
|
@ -0,0 +1,63 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
#ifndef __STARFIVE_STR_H__
|
||||
#define __STARFIVE_STR_H__
|
||||
|
||||
#include <linux/delay.h>
|
||||
#include <linux/dma-mapping.h>
|
||||
#include <linux/dmaengine.h>
|
||||
|
||||
#include <crypto/engine.h>
|
||||
|
||||
#define STARFIVE_ALG_CR_OFFSET 0x0
|
||||
#define STARFIVE_ALG_FIFO_OFFSET 0x4
|
||||
#define STARFIVE_IE_MASK_OFFSET 0x8
|
||||
#define STARFIVE_IE_FLAG_OFFSET 0xc
|
||||
#define STARFIVE_DMA_IN_LEN_OFFSET 0x10
|
||||
#define STARFIVE_DMA_OUT_LEN_OFFSET 0x14
|
||||
|
||||
#define STARFIVE_MSG_BUFFER_SIZE SZ_16K
|
||||
|
||||
union starfive_alg_cr {
|
||||
u32 v;
|
||||
struct {
|
||||
u32 start :1;
|
||||
u32 aes_dma_en :1;
|
||||
u32 rsvd_0 :1;
|
||||
u32 hash_dma_en :1;
|
||||
u32 alg_done :1;
|
||||
u32 rsvd_1 :3;
|
||||
u32 clear :1;
|
||||
u32 rsvd_2 :23;
|
||||
};
|
||||
};
|
||||
|
||||
struct starfive_cryp_ctx {
|
||||
struct crypto_engine_ctx enginectx;
|
||||
struct starfive_cryp_dev *cryp;
|
||||
};
|
||||
|
||||
struct starfive_cryp_dev {
|
||||
struct list_head list;
|
||||
struct device *dev;
|
||||
|
||||
struct clk *hclk;
|
||||
struct clk *ahb;
|
||||
struct reset_control *rst;
|
||||
|
||||
void __iomem *base;
|
||||
phys_addr_t phys_base;
|
||||
|
||||
u32 dma_maxburst;
|
||||
struct dma_chan *tx;
|
||||
struct dma_chan *rx;
|
||||
struct dma_slave_config cfg_in;
|
||||
struct dma_slave_config cfg_out;
|
||||
|
||||
struct crypto_engine *engine;
|
||||
|
||||
union starfive_alg_cr alg_cr;
|
||||
};
|
||||
|
||||
struct starfive_cryp_dev *starfive_cryp_find_dev(struct starfive_cryp_ctx *ctx);
|
||||
|
||||
#endif
|
Loading…
Reference in a new issue