15c8d850cSKrzysztof Kozlowski // SPDX-License-Identifier: GPL-2.0
25c8d850cSKrzysztof Kozlowski //
35c8d850cSKrzysztof Kozlowski // Cryptographic API.
45c8d850cSKrzysztof Kozlowski //
55c8d850cSKrzysztof Kozlowski // Support for Samsung S5PV210 and Exynos HW acceleration.
65c8d850cSKrzysztof Kozlowski //
75c8d850cSKrzysztof Kozlowski // Copyright (C) 2011 NetUP Inc. All rights reserved.
85c8d850cSKrzysztof Kozlowski // Copyright (c) 2017 Samsung Electronics Co., Ltd. All rights reserved.
95c8d850cSKrzysztof Kozlowski //
105c8d850cSKrzysztof Kozlowski // Hash part based on omap-sham.c driver.
11a49e490cSVladimir Zapolskiy
12a49e490cSVladimir Zapolskiy #include <linux/clk.h>
133cf9d84eSKrzysztof Kozlowski #include <linux/crypto.h>
143cf9d84eSKrzysztof Kozlowski #include <linux/dma-mapping.h>
153cf9d84eSKrzysztof Kozlowski #include <linux/err.h>
163cf9d84eSKrzysztof Kozlowski #include <linux/errno.h>
173cf9d84eSKrzysztof Kozlowski #include <linux/init.h>
183cf9d84eSKrzysztof Kozlowski #include <linux/interrupt.h>
193cf9d84eSKrzysztof Kozlowski #include <linux/io.h>
203cf9d84eSKrzysztof Kozlowski #include <linux/kernel.h>
213cf9d84eSKrzysztof Kozlowski #include <linux/module.h>
223cf9d84eSKrzysztof Kozlowski #include <linux/of.h>
23a49e490cSVladimir Zapolskiy #include <linux/platform_device.h>
24a49e490cSVladimir Zapolskiy #include <linux/scatterlist.h>
25a49e490cSVladimir Zapolskiy
26a49e490cSVladimir Zapolskiy #include <crypto/ctr.h>
273cf9d84eSKrzysztof Kozlowski #include <crypto/aes.h>
283cf9d84eSKrzysztof Kozlowski #include <crypto/algapi.h>
299e4a1100SKrzysztof Kozlowski #include <crypto/scatterwalk.h>
30a49e490cSVladimir Zapolskiy
31c2afad6cSKamil Konieczny #include <crypto/hash.h>
32c2afad6cSKamil Konieczny #include <crypto/md5.h>
33a24d22b2SEric Biggers #include <crypto/sha1.h>
34a24d22b2SEric Biggers #include <crypto/sha2.h>
35c2afad6cSKamil Konieczny #include <crypto/internal/hash.h>
36c2afad6cSKamil Konieczny
37a49e490cSVladimir Zapolskiy #define _SBF(s, v) ((v) << (s))
38a49e490cSVladimir Zapolskiy
39a49e490cSVladimir Zapolskiy /* Feed control registers */
40a49e490cSVladimir Zapolskiy #define SSS_REG_FCINTSTAT 0x0000
41c2afad6cSKamil Konieczny #define SSS_FCINTSTAT_HPARTINT BIT(7)
42c2afad6cSKamil Konieczny #define SSS_FCINTSTAT_HDONEINT BIT(5)
435e00c604SKrzysztof Kozlowski #define SSS_FCINTSTAT_BRDMAINT BIT(3)
445e00c604SKrzysztof Kozlowski #define SSS_FCINTSTAT_BTDMAINT BIT(2)
455e00c604SKrzysztof Kozlowski #define SSS_FCINTSTAT_HRDMAINT BIT(1)
465e00c604SKrzysztof Kozlowski #define SSS_FCINTSTAT_PKDMAINT BIT(0)
47a49e490cSVladimir Zapolskiy
48a49e490cSVladimir Zapolskiy #define SSS_REG_FCINTENSET 0x0004
49c2afad6cSKamil Konieczny #define SSS_FCINTENSET_HPARTINTENSET BIT(7)
50c2afad6cSKamil Konieczny #define SSS_FCINTENSET_HDONEINTENSET BIT(5)
515e00c604SKrzysztof Kozlowski #define SSS_FCINTENSET_BRDMAINTENSET BIT(3)
525e00c604SKrzysztof Kozlowski #define SSS_FCINTENSET_BTDMAINTENSET BIT(2)
535e00c604SKrzysztof Kozlowski #define SSS_FCINTENSET_HRDMAINTENSET BIT(1)
545e00c604SKrzysztof Kozlowski #define SSS_FCINTENSET_PKDMAINTENSET BIT(0)
55a49e490cSVladimir Zapolskiy
56a49e490cSVladimir Zapolskiy #define SSS_REG_FCINTENCLR 0x0008
57c2afad6cSKamil Konieczny #define SSS_FCINTENCLR_HPARTINTENCLR BIT(7)
58c2afad6cSKamil Konieczny #define SSS_FCINTENCLR_HDONEINTENCLR BIT(5)
595e00c604SKrzysztof Kozlowski #define SSS_FCINTENCLR_BRDMAINTENCLR BIT(3)
605e00c604SKrzysztof Kozlowski #define SSS_FCINTENCLR_BTDMAINTENCLR BIT(2)
615e00c604SKrzysztof Kozlowski #define SSS_FCINTENCLR_HRDMAINTENCLR BIT(1)
625e00c604SKrzysztof Kozlowski #define SSS_FCINTENCLR_PKDMAINTENCLR BIT(0)
63a49e490cSVladimir Zapolskiy
64a49e490cSVladimir Zapolskiy #define SSS_REG_FCINTPEND 0x000C
65c2afad6cSKamil Konieczny #define SSS_FCINTPEND_HPARTINTP BIT(7)
66c2afad6cSKamil Konieczny #define SSS_FCINTPEND_HDONEINTP BIT(5)
675e00c604SKrzysztof Kozlowski #define SSS_FCINTPEND_BRDMAINTP BIT(3)
685e00c604SKrzysztof Kozlowski #define SSS_FCINTPEND_BTDMAINTP BIT(2)
695e00c604SKrzysztof Kozlowski #define SSS_FCINTPEND_HRDMAINTP BIT(1)
705e00c604SKrzysztof Kozlowski #define SSS_FCINTPEND_PKDMAINTP BIT(0)
71a49e490cSVladimir Zapolskiy
72a49e490cSVladimir Zapolskiy #define SSS_REG_FCFIFOSTAT 0x0010
735e00c604SKrzysztof Kozlowski #define SSS_FCFIFOSTAT_BRFIFOFUL BIT(7)
745e00c604SKrzysztof Kozlowski #define SSS_FCFIFOSTAT_BRFIFOEMP BIT(6)
755e00c604SKrzysztof Kozlowski #define SSS_FCFIFOSTAT_BTFIFOFUL BIT(5)
765e00c604SKrzysztof Kozlowski #define SSS_FCFIFOSTAT_BTFIFOEMP BIT(4)
775e00c604SKrzysztof Kozlowski #define SSS_FCFIFOSTAT_HRFIFOFUL BIT(3)
785e00c604SKrzysztof Kozlowski #define SSS_FCFIFOSTAT_HRFIFOEMP BIT(2)
795e00c604SKrzysztof Kozlowski #define SSS_FCFIFOSTAT_PKFIFOFUL BIT(1)
805e00c604SKrzysztof Kozlowski #define SSS_FCFIFOSTAT_PKFIFOEMP BIT(0)
81a49e490cSVladimir Zapolskiy
82a49e490cSVladimir Zapolskiy #define SSS_REG_FCFIFOCTRL 0x0014
835e00c604SKrzysztof Kozlowski #define SSS_FCFIFOCTRL_DESSEL BIT(2)
84a49e490cSVladimir Zapolskiy #define SSS_HASHIN_INDEPENDENT _SBF(0, 0x00)
85a49e490cSVladimir Zapolskiy #define SSS_HASHIN_CIPHER_INPUT _SBF(0, 0x01)
86a49e490cSVladimir Zapolskiy #define SSS_HASHIN_CIPHER_OUTPUT _SBF(0, 0x02)
87c2afad6cSKamil Konieczny #define SSS_HASHIN_MASK _SBF(0, 0x03)
88a49e490cSVladimir Zapolskiy
89a49e490cSVladimir Zapolskiy #define SSS_REG_FCBRDMAS 0x0020
90a49e490cSVladimir Zapolskiy #define SSS_REG_FCBRDMAL 0x0024
91a49e490cSVladimir Zapolskiy #define SSS_REG_FCBRDMAC 0x0028
925e00c604SKrzysztof Kozlowski #define SSS_FCBRDMAC_BYTESWAP BIT(1)
935e00c604SKrzysztof Kozlowski #define SSS_FCBRDMAC_FLUSH BIT(0)
94a49e490cSVladimir Zapolskiy
95a49e490cSVladimir Zapolskiy #define SSS_REG_FCBTDMAS 0x0030
96a49e490cSVladimir Zapolskiy #define SSS_REG_FCBTDMAL 0x0034
97a49e490cSVladimir Zapolskiy #define SSS_REG_FCBTDMAC 0x0038
985e00c604SKrzysztof Kozlowski #define SSS_FCBTDMAC_BYTESWAP BIT(1)
995e00c604SKrzysztof Kozlowski #define SSS_FCBTDMAC_FLUSH BIT(0)
100a49e490cSVladimir Zapolskiy
101a49e490cSVladimir Zapolskiy #define SSS_REG_FCHRDMAS 0x0040
102a49e490cSVladimir Zapolskiy #define SSS_REG_FCHRDMAL 0x0044
103a49e490cSVladimir Zapolskiy #define SSS_REG_FCHRDMAC 0x0048
1045e00c604SKrzysztof Kozlowski #define SSS_FCHRDMAC_BYTESWAP BIT(1)
1055e00c604SKrzysztof Kozlowski #define SSS_FCHRDMAC_FLUSH BIT(0)
106a49e490cSVladimir Zapolskiy
107a49e490cSVladimir Zapolskiy #define SSS_REG_FCPKDMAS 0x0050
108a49e490cSVladimir Zapolskiy #define SSS_REG_FCPKDMAL 0x0054
109a49e490cSVladimir Zapolskiy #define SSS_REG_FCPKDMAC 0x0058
1105e00c604SKrzysztof Kozlowski #define SSS_FCPKDMAC_BYTESWAP BIT(3)
1115e00c604SKrzysztof Kozlowski #define SSS_FCPKDMAC_DESCEND BIT(2)
1125e00c604SKrzysztof Kozlowski #define SSS_FCPKDMAC_TRANSMIT BIT(1)
1135e00c604SKrzysztof Kozlowski #define SSS_FCPKDMAC_FLUSH BIT(0)
114a49e490cSVladimir Zapolskiy
115a49e490cSVladimir Zapolskiy #define SSS_REG_FCPKDMAO 0x005C
116a49e490cSVladimir Zapolskiy
117a49e490cSVladimir Zapolskiy /* AES registers */
11889245107SNaveen Krishna Chatradhi #define SSS_REG_AES_CONTROL 0x00
1195e00c604SKrzysztof Kozlowski #define SSS_AES_BYTESWAP_DI BIT(11)
1205e00c604SKrzysztof Kozlowski #define SSS_AES_BYTESWAP_DO BIT(10)
1215e00c604SKrzysztof Kozlowski #define SSS_AES_BYTESWAP_IV BIT(9)
1225e00c604SKrzysztof Kozlowski #define SSS_AES_BYTESWAP_CNT BIT(8)
1235e00c604SKrzysztof Kozlowski #define SSS_AES_BYTESWAP_KEY BIT(7)
1245e00c604SKrzysztof Kozlowski #define SSS_AES_KEY_CHANGE_MODE BIT(6)
125a49e490cSVladimir Zapolskiy #define SSS_AES_KEY_SIZE_128 _SBF(4, 0x00)
126a49e490cSVladimir Zapolskiy #define SSS_AES_KEY_SIZE_192 _SBF(4, 0x01)
127a49e490cSVladimir Zapolskiy #define SSS_AES_KEY_SIZE_256 _SBF(4, 0x02)
1285e00c604SKrzysztof Kozlowski #define SSS_AES_FIFO_MODE BIT(3)
129a49e490cSVladimir Zapolskiy #define SSS_AES_CHAIN_MODE_ECB _SBF(1, 0x00)
130a49e490cSVladimir Zapolskiy #define SSS_AES_CHAIN_MODE_CBC _SBF(1, 0x01)
131a49e490cSVladimir Zapolskiy #define SSS_AES_CHAIN_MODE_CTR _SBF(1, 0x02)
1325e00c604SKrzysztof Kozlowski #define SSS_AES_MODE_DECRYPT BIT(0)
133a49e490cSVladimir Zapolskiy
13489245107SNaveen Krishna Chatradhi #define SSS_REG_AES_STATUS 0x04
1355e00c604SKrzysztof Kozlowski #define SSS_AES_BUSY BIT(2)
1365e00c604SKrzysztof Kozlowski #define SSS_AES_INPUT_READY BIT(1)
1375e00c604SKrzysztof Kozlowski #define SSS_AES_OUTPUT_READY BIT(0)
138a49e490cSVladimir Zapolskiy
13989245107SNaveen Krishna Chatradhi #define SSS_REG_AES_IN_DATA(s) (0x10 + (s << 2))
14089245107SNaveen Krishna Chatradhi #define SSS_REG_AES_OUT_DATA(s) (0x20 + (s << 2))
14189245107SNaveen Krishna Chatradhi #define SSS_REG_AES_IV_DATA(s) (0x30 + (s << 2))
14289245107SNaveen Krishna Chatradhi #define SSS_REG_AES_CNT_DATA(s) (0x40 + (s << 2))
14389245107SNaveen Krishna Chatradhi #define SSS_REG_AES_KEY_DATA(s) (0x80 + (s << 2))
144a49e490cSVladimir Zapolskiy
145a49e490cSVladimir Zapolskiy #define SSS_REG(dev, reg) ((dev)->ioaddr + (SSS_REG_##reg))
146a49e490cSVladimir Zapolskiy #define SSS_READ(dev, reg) __raw_readl(SSS_REG(dev, reg))
147a49e490cSVladimir Zapolskiy #define SSS_WRITE(dev, reg, val) __raw_writel((val), SSS_REG(dev, reg))
148a49e490cSVladimir Zapolskiy
14989245107SNaveen Krishna Chatradhi #define SSS_AES_REG(dev, reg) ((dev)->aes_ioaddr + SSS_REG_##reg)
15089245107SNaveen Krishna Chatradhi #define SSS_AES_WRITE(dev, reg, val) __raw_writel((val), \
15189245107SNaveen Krishna Chatradhi SSS_AES_REG(dev, reg))
15289245107SNaveen Krishna Chatradhi
153a49e490cSVladimir Zapolskiy /* HW engine modes */
1545e00c604SKrzysztof Kozlowski #define FLAGS_AES_DECRYPT BIT(0)
155a49e490cSVladimir Zapolskiy #define FLAGS_AES_MODE_MASK _SBF(1, 0x03)
156a49e490cSVladimir Zapolskiy #define FLAGS_AES_CBC _SBF(1, 0x01)
157a49e490cSVladimir Zapolskiy #define FLAGS_AES_CTR _SBF(1, 0x02)
158a49e490cSVladimir Zapolskiy
159a49e490cSVladimir Zapolskiy #define AES_KEY_LEN 16
160a49e490cSVladimir Zapolskiy #define CRYPTO_QUEUE_LEN 1
161a49e490cSVladimir Zapolskiy
162c2afad6cSKamil Konieczny /* HASH registers */
163c2afad6cSKamil Konieczny #define SSS_REG_HASH_CTRL 0x00
164c2afad6cSKamil Konieczny
165c2afad6cSKamil Konieczny #define SSS_HASH_USER_IV_EN BIT(5)
166c2afad6cSKamil Konieczny #define SSS_HASH_INIT_BIT BIT(4)
167c2afad6cSKamil Konieczny #define SSS_HASH_ENGINE_SHA1 _SBF(1, 0x00)
168c2afad6cSKamil Konieczny #define SSS_HASH_ENGINE_MD5 _SBF(1, 0x01)
169c2afad6cSKamil Konieczny #define SSS_HASH_ENGINE_SHA256 _SBF(1, 0x02)
170c2afad6cSKamil Konieczny
171c2afad6cSKamil Konieczny #define SSS_HASH_ENGINE_MASK _SBF(1, 0x03)
172c2afad6cSKamil Konieczny
173c2afad6cSKamil Konieczny #define SSS_REG_HASH_CTRL_PAUSE 0x04
174c2afad6cSKamil Konieczny
175c2afad6cSKamil Konieczny #define SSS_HASH_PAUSE BIT(0)
176c2afad6cSKamil Konieczny
177c2afad6cSKamil Konieczny #define SSS_REG_HASH_CTRL_FIFO 0x08
178c2afad6cSKamil Konieczny
179c2afad6cSKamil Konieczny #define SSS_HASH_FIFO_MODE_DMA BIT(0)
180c2afad6cSKamil Konieczny #define SSS_HASH_FIFO_MODE_CPU 0
181c2afad6cSKamil Konieczny
182c2afad6cSKamil Konieczny #define SSS_REG_HASH_CTRL_SWAP 0x0C
183c2afad6cSKamil Konieczny
184c2afad6cSKamil Konieczny #define SSS_HASH_BYTESWAP_DI BIT(3)
185c2afad6cSKamil Konieczny #define SSS_HASH_BYTESWAP_DO BIT(2)
186c2afad6cSKamil Konieczny #define SSS_HASH_BYTESWAP_IV BIT(1)
187c2afad6cSKamil Konieczny #define SSS_HASH_BYTESWAP_KEY BIT(0)
188c2afad6cSKamil Konieczny
189c2afad6cSKamil Konieczny #define SSS_REG_HASH_STATUS 0x10
190c2afad6cSKamil Konieczny
191c2afad6cSKamil Konieczny #define SSS_HASH_STATUS_MSG_DONE BIT(6)
192c2afad6cSKamil Konieczny #define SSS_HASH_STATUS_PARTIAL_DONE BIT(4)
193c2afad6cSKamil Konieczny #define SSS_HASH_STATUS_BUFFER_READY BIT(0)
194c2afad6cSKamil Konieczny
195c2afad6cSKamil Konieczny #define SSS_REG_HASH_MSG_SIZE_LOW 0x20
196c2afad6cSKamil Konieczny #define SSS_REG_HASH_MSG_SIZE_HIGH 0x24
197c2afad6cSKamil Konieczny
198c2afad6cSKamil Konieczny #define SSS_REG_HASH_PRE_MSG_SIZE_LOW 0x28
199c2afad6cSKamil Konieczny #define SSS_REG_HASH_PRE_MSG_SIZE_HIGH 0x2C
200c2afad6cSKamil Konieczny
201c2afad6cSKamil Konieczny #define SSS_REG_HASH_IV(s) (0xB0 + ((s) << 2))
202c2afad6cSKamil Konieczny #define SSS_REG_HASH_OUT(s) (0x100 + ((s) << 2))
203c2afad6cSKamil Konieczny
204c2afad6cSKamil Konieczny #define HASH_BLOCK_SIZE 64
205c2afad6cSKamil Konieczny #define HASH_REG_SIZEOF 4
206c2afad6cSKamil Konieczny #define HASH_MD5_MAX_REG (MD5_DIGEST_SIZE / HASH_REG_SIZEOF)
207c2afad6cSKamil Konieczny #define HASH_SHA1_MAX_REG (SHA1_DIGEST_SIZE / HASH_REG_SIZEOF)
208c2afad6cSKamil Konieczny #define HASH_SHA256_MAX_REG (SHA256_DIGEST_SIZE / HASH_REG_SIZEOF)
209c2afad6cSKamil Konieczny
210c2afad6cSKamil Konieczny /*
211c2afad6cSKamil Konieczny * HASH bit numbers, used by device, setting in dev->hash_flags with
212c2afad6cSKamil Konieczny * functions set_bit(), clear_bit() or tested with test_bit() or BIT(),
213c2afad6cSKamil Konieczny * to keep HASH state BUSY or FREE, or to signal state from irq_handler
214c2afad6cSKamil Konieczny * to hash_tasklet. SGS keep track of allocated memory for scatterlist
215c2afad6cSKamil Konieczny */
216c2afad6cSKamil Konieczny #define HASH_FLAGS_BUSY 0
217c2afad6cSKamil Konieczny #define HASH_FLAGS_FINAL 1
218c2afad6cSKamil Konieczny #define HASH_FLAGS_DMA_ACTIVE 2
219c2afad6cSKamil Konieczny #define HASH_FLAGS_OUTPUT_READY 3
220c2afad6cSKamil Konieczny #define HASH_FLAGS_DMA_READY 4
221c2afad6cSKamil Konieczny #define HASH_FLAGS_SGS_COPIED 5
222c2afad6cSKamil Konieczny #define HASH_FLAGS_SGS_ALLOCED 6
223c2afad6cSKamil Konieczny
224c2afad6cSKamil Konieczny /* HASH HW constants */
225c2afad6cSKamil Konieczny #define BUFLEN HASH_BLOCK_SIZE
226c2afad6cSKamil Konieczny
227c2afad6cSKamil Konieczny #define SSS_HASH_QUEUE_LENGTH 10
228c2afad6cSKamil Konieczny
22989245107SNaveen Krishna Chatradhi /**
23089245107SNaveen Krishna Chatradhi * struct samsung_aes_variant - platform specific SSS driver data
23189245107SNaveen Krishna Chatradhi * @aes_offset: AES register offset from SSS module's base.
232c2afad6cSKamil Konieczny * @hash_offset: HASH register offset from SSS module's base.
2330918f18cSKamil Konieczny * @clk_names: names of clocks needed to run SSS IP
23489245107SNaveen Krishna Chatradhi *
23589245107SNaveen Krishna Chatradhi * Specifies platform specific configuration of SSS module.
23689245107SNaveen Krishna Chatradhi * Note: A structure for driver specific platform data is used for future
23789245107SNaveen Krishna Chatradhi * expansion of its usage.
23889245107SNaveen Krishna Chatradhi */
23989245107SNaveen Krishna Chatradhi struct samsung_aes_variant {
24089245107SNaveen Krishna Chatradhi unsigned int aes_offset;
241c2afad6cSKamil Konieczny unsigned int hash_offset;
242aa1abbe0SKamil Konieczny const char *clk_names[2];
24389245107SNaveen Krishna Chatradhi };
24489245107SNaveen Krishna Chatradhi
245a49e490cSVladimir Zapolskiy struct s5p_aes_reqctx {
246a49e490cSVladimir Zapolskiy unsigned long mode;
247a49e490cSVladimir Zapolskiy };
248a49e490cSVladimir Zapolskiy
249a49e490cSVladimir Zapolskiy struct s5p_aes_ctx {
250a49e490cSVladimir Zapolskiy struct s5p_aes_dev *dev;
251a49e490cSVladimir Zapolskiy
252b1b4416fSChristoph Manszewski u8 aes_key[AES_MAX_KEY_SIZE];
253b1b4416fSChristoph Manszewski u8 nonce[CTR_RFC3686_NONCE_SIZE];
254a49e490cSVladimir Zapolskiy int keylen;
255a49e490cSVladimir Zapolskiy };
256a49e490cSVladimir Zapolskiy
257106d7334SKrzysztof Kozlowski /**
258106d7334SKrzysztof Kozlowski * struct s5p_aes_dev - Crypto device state container
259106d7334SKrzysztof Kozlowski * @dev: Associated device
260106d7334SKrzysztof Kozlowski * @clk: Clock for accessing hardware
26198a6bc10SKrzysztof Kozlowski * @pclk: APB bus clock necessary to access the hardware
262106d7334SKrzysztof Kozlowski * @ioaddr: Mapped IO memory region
263106d7334SKrzysztof Kozlowski * @aes_ioaddr: Per-varian offset for AES block IO memory
264106d7334SKrzysztof Kozlowski * @irq_fc: Feed control interrupt line
265106d7334SKrzysztof Kozlowski * @req: Crypto request currently handled by the device
266106d7334SKrzysztof Kozlowski * @ctx: Configuration for currently handled crypto request
267106d7334SKrzysztof Kozlowski * @sg_src: Scatter list with source data for currently handled block
268106d7334SKrzysztof Kozlowski * in device. This is DMA-mapped into device.
269106d7334SKrzysztof Kozlowski * @sg_dst: Scatter list with destination data for currently handled block
270106d7334SKrzysztof Kozlowski * in device. This is DMA-mapped into device.
271106d7334SKrzysztof Kozlowski * @sg_src_cpy: In case of unaligned access, copied scatter list
272106d7334SKrzysztof Kozlowski * with source data.
273106d7334SKrzysztof Kozlowski * @sg_dst_cpy: In case of unaligned access, copied scatter list
274106d7334SKrzysztof Kozlowski * with destination data.
275106d7334SKrzysztof Kozlowski * @tasklet: New request scheduling jib
276106d7334SKrzysztof Kozlowski * @queue: Crypto queue
277106d7334SKrzysztof Kozlowski * @busy: Indicates whether the device is currently handling some request
278106d7334SKrzysztof Kozlowski * thus it uses some of the fields from this state, like:
279106d7334SKrzysztof Kozlowski * req, ctx, sg_src/dst (and copies). This essentially
280106d7334SKrzysztof Kozlowski * protects against concurrent access to these fields.
281106d7334SKrzysztof Kozlowski * @lock: Lock for protecting both access to device hardware registers
282106d7334SKrzysztof Kozlowski * and fields related to current request (including the busy field).
283c2afad6cSKamil Konieczny * @res: Resources for hash.
284c2afad6cSKamil Konieczny * @io_hash_base: Per-variant offset for HASH block IO memory.
285c2afad6cSKamil Konieczny * @hash_lock: Lock for protecting hash_req, hash_queue and hash_flags
286c2afad6cSKamil Konieczny * variable.
287c2afad6cSKamil Konieczny * @hash_flags: Flags for current HASH op.
288c2afad6cSKamil Konieczny * @hash_queue: Async hash queue.
289c2afad6cSKamil Konieczny * @hash_tasklet: New HASH request scheduling job.
290c2afad6cSKamil Konieczny * @xmit_buf: Buffer for current HASH request transfer into SSS block.
291c2afad6cSKamil Konieczny * @hash_req: Current request sending to SSS HASH block.
292c2afad6cSKamil Konieczny * @hash_sg_iter: Scatterlist transferred through DMA into SSS HASH block.
293c2afad6cSKamil Konieczny * @hash_sg_cnt: Counter for hash_sg_iter.
294c2afad6cSKamil Konieczny *
295c2afad6cSKamil Konieczny * @use_hash: true if HASH algs enabled
296106d7334SKrzysztof Kozlowski */
297a49e490cSVladimir Zapolskiy struct s5p_aes_dev {
298a49e490cSVladimir Zapolskiy struct device *dev;
299a49e490cSVladimir Zapolskiy struct clk *clk;
3000918f18cSKamil Konieczny struct clk *pclk;
301a49e490cSVladimir Zapolskiy void __iomem *ioaddr;
30289245107SNaveen Krishna Chatradhi void __iomem *aes_ioaddr;
303a49e490cSVladimir Zapolskiy int irq_fc;
304a49e490cSVladimir Zapolskiy
305e6b98ce6SArd Biesheuvel struct skcipher_request *req;
306a49e490cSVladimir Zapolskiy struct s5p_aes_ctx *ctx;
307a49e490cSVladimir Zapolskiy struct scatterlist *sg_src;
308a49e490cSVladimir Zapolskiy struct scatterlist *sg_dst;
309a49e490cSVladimir Zapolskiy
3109e4a1100SKrzysztof Kozlowski struct scatterlist *sg_src_cpy;
3119e4a1100SKrzysztof Kozlowski struct scatterlist *sg_dst_cpy;
3129e4a1100SKrzysztof Kozlowski
313a49e490cSVladimir Zapolskiy struct tasklet_struct tasklet;
314a49e490cSVladimir Zapolskiy struct crypto_queue queue;
315a49e490cSVladimir Zapolskiy bool busy;
316a49e490cSVladimir Zapolskiy spinlock_t lock;
317c2afad6cSKamil Konieczny
318c2afad6cSKamil Konieczny struct resource *res;
319c2afad6cSKamil Konieczny void __iomem *io_hash_base;
320c2afad6cSKamil Konieczny
321c2afad6cSKamil Konieczny spinlock_t hash_lock; /* protect hash_ vars */
322c2afad6cSKamil Konieczny unsigned long hash_flags;
323c2afad6cSKamil Konieczny struct crypto_queue hash_queue;
324c2afad6cSKamil Konieczny struct tasklet_struct hash_tasklet;
325c2afad6cSKamil Konieczny
326c2afad6cSKamil Konieczny u8 xmit_buf[BUFLEN];
327c2afad6cSKamil Konieczny struct ahash_request *hash_req;
328c2afad6cSKamil Konieczny struct scatterlist *hash_sg_iter;
329c2afad6cSKamil Konieczny unsigned int hash_sg_cnt;
330c2afad6cSKamil Konieczny
331c2afad6cSKamil Konieczny bool use_hash;
332a49e490cSVladimir Zapolskiy };
333a49e490cSVladimir Zapolskiy
334c2afad6cSKamil Konieczny /**
335c2afad6cSKamil Konieczny * struct s5p_hash_reqctx - HASH request context
336c2afad6cSKamil Konieczny * @dd: Associated device
337c2afad6cSKamil Konieczny * @op_update: Current request operation (OP_UPDATE or OP_FINAL)
338c2afad6cSKamil Konieczny * @digcnt: Number of bytes processed by HW (without buffer[] ones)
339c2afad6cSKamil Konieczny * @digest: Digest message or IV for partial result
340c2afad6cSKamil Konieczny * @nregs: Number of HW registers for digest or IV read/write
341c2afad6cSKamil Konieczny * @engine: Bits for selecting type of HASH in SSS block
342c2afad6cSKamil Konieczny * @sg: sg for DMA transfer
343c2afad6cSKamil Konieczny * @sg_len: Length of sg for DMA transfer
34498a6bc10SKrzysztof Kozlowski * @sgl: sg for joining buffer and req->src scatterlist
345c2afad6cSKamil Konieczny * @skip: Skip offset in req->src for current op
346c2afad6cSKamil Konieczny * @total: Total number of bytes for current request
347c2afad6cSKamil Konieczny * @finup: Keep state for finup or final.
348c2afad6cSKamil Konieczny * @error: Keep track of error.
349c2afad6cSKamil Konieczny * @bufcnt: Number of bytes holded in buffer[]
35098a6bc10SKrzysztof Kozlowski * @buffer: For byte(s) from end of req->src in UPDATE op
351c2afad6cSKamil Konieczny */
352c2afad6cSKamil Konieczny struct s5p_hash_reqctx {
353c2afad6cSKamil Konieczny struct s5p_aes_dev *dd;
354c2afad6cSKamil Konieczny bool op_update;
355c2afad6cSKamil Konieczny
356c2afad6cSKamil Konieczny u64 digcnt;
357c2afad6cSKamil Konieczny u8 digest[SHA256_DIGEST_SIZE];
358c2afad6cSKamil Konieczny
359c2afad6cSKamil Konieczny unsigned int nregs; /* digest_size / sizeof(reg) */
360c2afad6cSKamil Konieczny u32 engine;
361c2afad6cSKamil Konieczny
362c2afad6cSKamil Konieczny struct scatterlist *sg;
363c2afad6cSKamil Konieczny unsigned int sg_len;
364c2afad6cSKamil Konieczny struct scatterlist sgl[2];
365c2afad6cSKamil Konieczny unsigned int skip;
366c2afad6cSKamil Konieczny unsigned int total;
367c2afad6cSKamil Konieczny bool finup;
368c2afad6cSKamil Konieczny bool error;
369c2afad6cSKamil Konieczny
370c2afad6cSKamil Konieczny u32 bufcnt;
371a4a70fa9SGustavo A. R. Silva u8 buffer[];
372c2afad6cSKamil Konieczny };
373c2afad6cSKamil Konieczny
374c2afad6cSKamil Konieczny /**
375c2afad6cSKamil Konieczny * struct s5p_hash_ctx - HASH transformation context
376c2afad6cSKamil Konieczny * @dd: Associated device
377c2afad6cSKamil Konieczny * @flags: Bits for algorithm HASH.
378c2afad6cSKamil Konieczny * @fallback: Software transformation for zero message or size < BUFLEN.
379c2afad6cSKamil Konieczny */
380c2afad6cSKamil Konieczny struct s5p_hash_ctx {
381c2afad6cSKamil Konieczny struct s5p_aes_dev *dd;
382c2afad6cSKamil Konieczny unsigned long flags;
383c2afad6cSKamil Konieczny struct crypto_shash *fallback;
384c2afad6cSKamil Konieczny };
385a49e490cSVladimir Zapolskiy
38689245107SNaveen Krishna Chatradhi static const struct samsung_aes_variant s5p_aes_data = {
38789245107SNaveen Krishna Chatradhi .aes_offset = 0x4000,
388c2afad6cSKamil Konieczny .hash_offset = 0x6000,
3890918f18cSKamil Konieczny .clk_names = { "secss", },
39089245107SNaveen Krishna Chatradhi };
39189245107SNaveen Krishna Chatradhi
39289245107SNaveen Krishna Chatradhi static const struct samsung_aes_variant exynos_aes_data = {
39389245107SNaveen Krishna Chatradhi .aes_offset = 0x200,
394c2afad6cSKamil Konieczny .hash_offset = 0x400,
3950918f18cSKamil Konieczny .clk_names = { "secss", },
3960918f18cSKamil Konieczny };
3970918f18cSKamil Konieczny
3980918f18cSKamil Konieczny static const struct samsung_aes_variant exynos5433_slim_aes_data = {
3990918f18cSKamil Konieczny .aes_offset = 0x400,
4000918f18cSKamil Konieczny .hash_offset = 0x800,
401664b0f41SKrzysztof Kozlowski .clk_names = { "aclk", "pclk", },
40289245107SNaveen Krishna Chatradhi };
40389245107SNaveen Krishna Chatradhi
4046b9f16e6SNaveen Krishna Chatradhi static const struct of_device_id s5p_sss_dt_match[] = {
40589245107SNaveen Krishna Chatradhi {
40689245107SNaveen Krishna Chatradhi .compatible = "samsung,s5pv210-secss",
40789245107SNaveen Krishna Chatradhi .data = &s5p_aes_data,
40889245107SNaveen Krishna Chatradhi },
40989245107SNaveen Krishna Chatradhi {
41089245107SNaveen Krishna Chatradhi .compatible = "samsung,exynos4210-secss",
41189245107SNaveen Krishna Chatradhi .data = &exynos_aes_data,
41289245107SNaveen Krishna Chatradhi },
4130918f18cSKamil Konieczny {
4140918f18cSKamil Konieczny .compatible = "samsung,exynos5433-slim-sss",
4150918f18cSKamil Konieczny .data = &exynos5433_slim_aes_data,
4160918f18cSKamil Konieczny },
4176b9f16e6SNaveen Krishna Chatradhi { },
4186b9f16e6SNaveen Krishna Chatradhi };
4196b9f16e6SNaveen Krishna Chatradhi MODULE_DEVICE_TABLE(of, s5p_sss_dt_match);
4206b9f16e6SNaveen Krishna Chatradhi
find_s5p_sss_version(const struct platform_device * pdev)4216584eacbSKrzysztof Kozlowski static inline const struct samsung_aes_variant *find_s5p_sss_version
4226584eacbSKrzysztof Kozlowski (const struct platform_device *pdev)
42389245107SNaveen Krishna Chatradhi {
4246b238db7SKrzysztof Kozlowski if (IS_ENABLED(CONFIG_OF) && (pdev->dev.of_node))
4256b238db7SKrzysztof Kozlowski return of_device_get_match_data(&pdev->dev);
426313becd1SKrzysztof Koz?owski
4276584eacbSKrzysztof Kozlowski return (const struct samsung_aes_variant *)
42889245107SNaveen Krishna Chatradhi platform_get_device_id(pdev)->driver_data;
42989245107SNaveen Krishna Chatradhi }
43089245107SNaveen Krishna Chatradhi
431c2afad6cSKamil Konieczny static struct s5p_aes_dev *s5p_dev;
432c2afad6cSKamil Konieczny
s5p_set_dma_indata(struct s5p_aes_dev * dev,const struct scatterlist * sg)4336584eacbSKrzysztof Kozlowski static void s5p_set_dma_indata(struct s5p_aes_dev *dev,
4346584eacbSKrzysztof Kozlowski const struct scatterlist *sg)
435a49e490cSVladimir Zapolskiy {
436a49e490cSVladimir Zapolskiy SSS_WRITE(dev, FCBRDMAS, sg_dma_address(sg));
437a49e490cSVladimir Zapolskiy SSS_WRITE(dev, FCBRDMAL, sg_dma_len(sg));
438a49e490cSVladimir Zapolskiy }
439a49e490cSVladimir Zapolskiy
s5p_set_dma_outdata(struct s5p_aes_dev * dev,const struct scatterlist * sg)4406584eacbSKrzysztof Kozlowski static void s5p_set_dma_outdata(struct s5p_aes_dev *dev,
4416584eacbSKrzysztof Kozlowski const struct scatterlist *sg)
442a49e490cSVladimir Zapolskiy {
443a49e490cSVladimir Zapolskiy SSS_WRITE(dev, FCBTDMAS, sg_dma_address(sg));
444a49e490cSVladimir Zapolskiy SSS_WRITE(dev, FCBTDMAL, sg_dma_len(sg));
445a49e490cSVladimir Zapolskiy }
446a49e490cSVladimir Zapolskiy
s5p_free_sg_cpy(struct s5p_aes_dev * dev,struct scatterlist ** sg)4479e4a1100SKrzysztof Kozlowski static void s5p_free_sg_cpy(struct s5p_aes_dev *dev, struct scatterlist **sg)
4489e4a1100SKrzysztof Kozlowski {
4499e4a1100SKrzysztof Kozlowski int len;
4509e4a1100SKrzysztof Kozlowski
4519e4a1100SKrzysztof Kozlowski if (!*sg)
4529e4a1100SKrzysztof Kozlowski return;
4539e4a1100SKrzysztof Kozlowski
454e6b98ce6SArd Biesheuvel len = ALIGN(dev->req->cryptlen, AES_BLOCK_SIZE);
4559e4a1100SKrzysztof Kozlowski free_pages((unsigned long)sg_virt(*sg), get_order(len));
4569e4a1100SKrzysztof Kozlowski
4579e4a1100SKrzysztof Kozlowski kfree(*sg);
4589e4a1100SKrzysztof Kozlowski *sg = NULL;
4599e4a1100SKrzysztof Kozlowski }
4609e4a1100SKrzysztof Kozlowski
s5p_sg_copy_buf(void * buf,struct scatterlist * sg,unsigned int nbytes,int out)4619e4a1100SKrzysztof Kozlowski static void s5p_sg_copy_buf(void *buf, struct scatterlist *sg,
4629e4a1100SKrzysztof Kozlowski unsigned int nbytes, int out)
4639e4a1100SKrzysztof Kozlowski {
4649e4a1100SKrzysztof Kozlowski struct scatter_walk walk;
4659e4a1100SKrzysztof Kozlowski
4669e4a1100SKrzysztof Kozlowski if (!nbytes)
4679e4a1100SKrzysztof Kozlowski return;
4689e4a1100SKrzysztof Kozlowski
4699e4a1100SKrzysztof Kozlowski scatterwalk_start(&walk, sg);
4709e4a1100SKrzysztof Kozlowski scatterwalk_copychunks(buf, &walk, nbytes, out);
4719e4a1100SKrzysztof Kozlowski scatterwalk_done(&walk, out, 0);
4729e4a1100SKrzysztof Kozlowski }
4739e4a1100SKrzysztof Kozlowski
s5p_sg_done(struct s5p_aes_dev * dev)47428b62b14SKrzysztof Kozlowski static void s5p_sg_done(struct s5p_aes_dev *dev)
475a49e490cSVladimir Zapolskiy {
476e6b98ce6SArd Biesheuvel struct skcipher_request *req = dev->req;
477e6b98ce6SArd Biesheuvel struct s5p_aes_reqctx *reqctx = skcipher_request_ctx(req);
478e8e3c1caSKamil Konieczny
4799e4a1100SKrzysztof Kozlowski if (dev->sg_dst_cpy) {
4809e4a1100SKrzysztof Kozlowski dev_dbg(dev->dev,
4819e4a1100SKrzysztof Kozlowski "Copying %d bytes of output data back to original place\n",
482e6b98ce6SArd Biesheuvel dev->req->cryptlen);
4839e4a1100SKrzysztof Kozlowski s5p_sg_copy_buf(sg_virt(dev->sg_dst_cpy), dev->req->dst,
484e6b98ce6SArd Biesheuvel dev->req->cryptlen, 1);
4859e4a1100SKrzysztof Kozlowski }
4869e4a1100SKrzysztof Kozlowski s5p_free_sg_cpy(dev, &dev->sg_src_cpy);
4879e4a1100SKrzysztof Kozlowski s5p_free_sg_cpy(dev, &dev->sg_dst_cpy);
488e8e3c1caSKamil Konieczny if (reqctx->mode & FLAGS_AES_CBC)
489e6b98ce6SArd Biesheuvel memcpy_fromio(req->iv, dev->aes_ioaddr + SSS_REG_AES_IV_DATA(0), AES_BLOCK_SIZE);
490e8e3c1caSKamil Konieczny
491e8e3c1caSKamil Konieczny else if (reqctx->mode & FLAGS_AES_CTR)
492e6b98ce6SArd Biesheuvel memcpy_fromio(req->iv, dev->aes_ioaddr + SSS_REG_AES_CNT_DATA(0), AES_BLOCK_SIZE);
49328b62b14SKrzysztof Kozlowski }
4949e4a1100SKrzysztof Kozlowski
49528b62b14SKrzysztof Kozlowski /* Calls the completion. Cannot be called with dev->lock hold. */
s5p_aes_complete(struct skcipher_request * req,int err)496e6b98ce6SArd Biesheuvel static void s5p_aes_complete(struct skcipher_request *req, int err)
49728b62b14SKrzysztof Kozlowski {
498e94c1c9bSHerbert Xu skcipher_request_complete(req, err);
499a49e490cSVladimir Zapolskiy }
500a49e490cSVladimir Zapolskiy
s5p_unset_outdata(struct s5p_aes_dev * dev)501a49e490cSVladimir Zapolskiy static void s5p_unset_outdata(struct s5p_aes_dev *dev)
502a49e490cSVladimir Zapolskiy {
503a49e490cSVladimir Zapolskiy dma_unmap_sg(dev->dev, dev->sg_dst, 1, DMA_FROM_DEVICE);
504a49e490cSVladimir Zapolskiy }
505a49e490cSVladimir Zapolskiy
s5p_unset_indata(struct s5p_aes_dev * dev)506a49e490cSVladimir Zapolskiy static void s5p_unset_indata(struct s5p_aes_dev *dev)
507a49e490cSVladimir Zapolskiy {
508a49e490cSVladimir Zapolskiy dma_unmap_sg(dev->dev, dev->sg_src, 1, DMA_TO_DEVICE);
509a49e490cSVladimir Zapolskiy }
510a49e490cSVladimir Zapolskiy
s5p_make_sg_cpy(struct s5p_aes_dev * dev,struct scatterlist * src,struct scatterlist ** dst)5119e4a1100SKrzysztof Kozlowski static int s5p_make_sg_cpy(struct s5p_aes_dev *dev, struct scatterlist *src,
5129e4a1100SKrzysztof Kozlowski struct scatterlist **dst)
5139e4a1100SKrzysztof Kozlowski {
5149e4a1100SKrzysztof Kozlowski void *pages;
5159e4a1100SKrzysztof Kozlowski int len;
5169e4a1100SKrzysztof Kozlowski
5179e4a1100SKrzysztof Kozlowski *dst = kmalloc(sizeof(**dst), GFP_ATOMIC);
5189e4a1100SKrzysztof Kozlowski if (!*dst)
5199e4a1100SKrzysztof Kozlowski return -ENOMEM;
5209e4a1100SKrzysztof Kozlowski
521e6b98ce6SArd Biesheuvel len = ALIGN(dev->req->cryptlen, AES_BLOCK_SIZE);
5229e4a1100SKrzysztof Kozlowski pages = (void *)__get_free_pages(GFP_ATOMIC, get_order(len));
5239e4a1100SKrzysztof Kozlowski if (!pages) {
5249e4a1100SKrzysztof Kozlowski kfree(*dst);
5259e4a1100SKrzysztof Kozlowski *dst = NULL;
5269e4a1100SKrzysztof Kozlowski return -ENOMEM;
5279e4a1100SKrzysztof Kozlowski }
5289e4a1100SKrzysztof Kozlowski
529e6b98ce6SArd Biesheuvel s5p_sg_copy_buf(pages, src, dev->req->cryptlen, 0);
5309e4a1100SKrzysztof Kozlowski
5319e4a1100SKrzysztof Kozlowski sg_init_table(*dst, 1);
5329e4a1100SKrzysztof Kozlowski sg_set_buf(*dst, pages, len);
5339e4a1100SKrzysztof Kozlowski
5349e4a1100SKrzysztof Kozlowski return 0;
5359e4a1100SKrzysztof Kozlowski }
5369e4a1100SKrzysztof Kozlowski
s5p_set_outdata(struct s5p_aes_dev * dev,struct scatterlist * sg)537a49e490cSVladimir Zapolskiy static int s5p_set_outdata(struct s5p_aes_dev *dev, struct scatterlist *sg)
538a49e490cSVladimir Zapolskiy {
539b1b4416fSChristoph Manszewski if (!sg->length)
540b1b4416fSChristoph Manszewski return -EINVAL;
541a49e490cSVladimir Zapolskiy
542b1b4416fSChristoph Manszewski if (!dma_map_sg(dev->dev, sg, 1, DMA_FROM_DEVICE))
543b1b4416fSChristoph Manszewski return -ENOMEM;
544a49e490cSVladimir Zapolskiy
545a49e490cSVladimir Zapolskiy dev->sg_dst = sg;
546a49e490cSVladimir Zapolskiy
547b1b4416fSChristoph Manszewski return 0;
548a49e490cSVladimir Zapolskiy }
549a49e490cSVladimir Zapolskiy
s5p_set_indata(struct s5p_aes_dev * dev,struct scatterlist * sg)550a49e490cSVladimir Zapolskiy static int s5p_set_indata(struct s5p_aes_dev *dev, struct scatterlist *sg)
551a49e490cSVladimir Zapolskiy {
552b1b4416fSChristoph Manszewski if (!sg->length)
553b1b4416fSChristoph Manszewski return -EINVAL;
554a49e490cSVladimir Zapolskiy
555b1b4416fSChristoph Manszewski if (!dma_map_sg(dev->dev, sg, 1, DMA_TO_DEVICE))
556b1b4416fSChristoph Manszewski return -ENOMEM;
557a49e490cSVladimir Zapolskiy
558a49e490cSVladimir Zapolskiy dev->sg_src = sg;
559a49e490cSVladimir Zapolskiy
560b1b4416fSChristoph Manszewski return 0;
561a49e490cSVladimir Zapolskiy }
562a49e490cSVladimir Zapolskiy
56379152e8dSKrzysztof Kozlowski /*
56428b62b14SKrzysztof Kozlowski * Returns -ERRNO on error (mapping of new data failed).
56528b62b14SKrzysztof Kozlowski * On success returns:
56628b62b14SKrzysztof Kozlowski * - 0 if there is no more data,
56728b62b14SKrzysztof Kozlowski * - 1 if new transmitting (output) data is ready and its address+length
56828b62b14SKrzysztof Kozlowski * have to be written to device (by calling s5p_set_dma_outdata()).
56979152e8dSKrzysztof Kozlowski */
s5p_aes_tx(struct s5p_aes_dev * dev)57028b62b14SKrzysztof Kozlowski static int s5p_aes_tx(struct s5p_aes_dev *dev)
571a49e490cSVladimir Zapolskiy {
57228b62b14SKrzysztof Kozlowski int ret = 0;
573a49e490cSVladimir Zapolskiy
574a49e490cSVladimir Zapolskiy s5p_unset_outdata(dev);
575a49e490cSVladimir Zapolskiy
576a49e490cSVladimir Zapolskiy if (!sg_is_last(dev->sg_dst)) {
57728b62b14SKrzysztof Kozlowski ret = s5p_set_outdata(dev, sg_next(dev->sg_dst));
57828b62b14SKrzysztof Kozlowski if (!ret)
57928b62b14SKrzysztof Kozlowski ret = 1;
580dc5e3f19SNaveen Krishna Chatradhi }
58179152e8dSKrzysztof Kozlowski
58279152e8dSKrzysztof Kozlowski return ret;
583a49e490cSVladimir Zapolskiy }
584a49e490cSVladimir Zapolskiy
58579152e8dSKrzysztof Kozlowski /*
58628b62b14SKrzysztof Kozlowski * Returns -ERRNO on error (mapping of new data failed).
58728b62b14SKrzysztof Kozlowski * On success returns:
58828b62b14SKrzysztof Kozlowski * - 0 if there is no more data,
58928b62b14SKrzysztof Kozlowski * - 1 if new receiving (input) data is ready and its address+length
59028b62b14SKrzysztof Kozlowski * have to be written to device (by calling s5p_set_dma_indata()).
59179152e8dSKrzysztof Kozlowski */
s5p_aes_rx(struct s5p_aes_dev * dev)59228b62b14SKrzysztof Kozlowski static int s5p_aes_rx(struct s5p_aes_dev *dev/*, bool *set_dma*/)
593a49e490cSVladimir Zapolskiy {
59428b62b14SKrzysztof Kozlowski int ret = 0;
595a49e490cSVladimir Zapolskiy
596a49e490cSVladimir Zapolskiy s5p_unset_indata(dev);
597a49e490cSVladimir Zapolskiy
598a49e490cSVladimir Zapolskiy if (!sg_is_last(dev->sg_src)) {
59928b62b14SKrzysztof Kozlowski ret = s5p_set_indata(dev, sg_next(dev->sg_src));
60028b62b14SKrzysztof Kozlowski if (!ret)
60128b62b14SKrzysztof Kozlowski ret = 1;
602a49e490cSVladimir Zapolskiy }
603a49e490cSVladimir Zapolskiy
60479152e8dSKrzysztof Kozlowski return ret;
605a49e490cSVladimir Zapolskiy }
606a49e490cSVladimir Zapolskiy
s5p_hash_read(struct s5p_aes_dev * dd,u32 offset)607c2afad6cSKamil Konieczny static inline u32 s5p_hash_read(struct s5p_aes_dev *dd, u32 offset)
608c2afad6cSKamil Konieczny {
609c2afad6cSKamil Konieczny return __raw_readl(dd->io_hash_base + offset);
610c2afad6cSKamil Konieczny }
611c2afad6cSKamil Konieczny
s5p_hash_write(struct s5p_aes_dev * dd,u32 offset,u32 value)612c2afad6cSKamil Konieczny static inline void s5p_hash_write(struct s5p_aes_dev *dd,
613c2afad6cSKamil Konieczny u32 offset, u32 value)
614c2afad6cSKamil Konieczny {
615c2afad6cSKamil Konieczny __raw_writel(value, dd->io_hash_base + offset);
616c2afad6cSKamil Konieczny }
617c2afad6cSKamil Konieczny
618c2afad6cSKamil Konieczny /**
619c2afad6cSKamil Konieczny * s5p_set_dma_hashdata() - start DMA with sg
620c2afad6cSKamil Konieczny * @dev: device
621c2afad6cSKamil Konieczny * @sg: scatterlist ready to DMA transmit
622c2afad6cSKamil Konieczny */
s5p_set_dma_hashdata(struct s5p_aes_dev * dev,const struct scatterlist * sg)623c2afad6cSKamil Konieczny static void s5p_set_dma_hashdata(struct s5p_aes_dev *dev,
6246584eacbSKrzysztof Kozlowski const struct scatterlist *sg)
625c2afad6cSKamil Konieczny {
626c2afad6cSKamil Konieczny dev->hash_sg_cnt--;
627c2afad6cSKamil Konieczny SSS_WRITE(dev, FCHRDMAS, sg_dma_address(sg));
628c2afad6cSKamil Konieczny SSS_WRITE(dev, FCHRDMAL, sg_dma_len(sg)); /* DMA starts */
629c2afad6cSKamil Konieczny }
630c2afad6cSKamil Konieczny
631c2afad6cSKamil Konieczny /**
632c2afad6cSKamil Konieczny * s5p_hash_rx() - get next hash_sg_iter
633c2afad6cSKamil Konieczny * @dev: device
634c2afad6cSKamil Konieczny *
635c2afad6cSKamil Konieczny * Return:
636c2afad6cSKamil Konieczny * 2 if there is no more data and it is UPDATE op
637c2afad6cSKamil Konieczny * 1 if new receiving (input) data is ready and can be written to device
638c2afad6cSKamil Konieczny * 0 if there is no more data and it is FINAL op
639c2afad6cSKamil Konieczny */
s5p_hash_rx(struct s5p_aes_dev * dev)640c2afad6cSKamil Konieczny static int s5p_hash_rx(struct s5p_aes_dev *dev)
641c2afad6cSKamil Konieczny {
642c2afad6cSKamil Konieczny if (dev->hash_sg_cnt > 0) {
643c2afad6cSKamil Konieczny dev->hash_sg_iter = sg_next(dev->hash_sg_iter);
644c2afad6cSKamil Konieczny return 1;
645c2afad6cSKamil Konieczny }
646c2afad6cSKamil Konieczny
647c2afad6cSKamil Konieczny set_bit(HASH_FLAGS_DMA_READY, &dev->hash_flags);
648c2afad6cSKamil Konieczny if (test_bit(HASH_FLAGS_FINAL, &dev->hash_flags))
649c2afad6cSKamil Konieczny return 0;
650c2afad6cSKamil Konieczny
651c2afad6cSKamil Konieczny return 2;
652c2afad6cSKamil Konieczny }
653c2afad6cSKamil Konieczny
s5p_aes_interrupt(int irq,void * dev_id)654a49e490cSVladimir Zapolskiy static irqreturn_t s5p_aes_interrupt(int irq, void *dev_id)
655a49e490cSVladimir Zapolskiy {
656a49e490cSVladimir Zapolskiy struct platform_device *pdev = dev_id;
657a49e490cSVladimir Zapolskiy struct s5p_aes_dev *dev = platform_get_drvdata(pdev);
658e6b98ce6SArd Biesheuvel struct skcipher_request *req;
65928b62b14SKrzysztof Kozlowski int err_dma_tx = 0;
66028b62b14SKrzysztof Kozlowski int err_dma_rx = 0;
661c2afad6cSKamil Konieczny int err_dma_hx = 0;
66228b62b14SKrzysztof Kozlowski bool tx_end = false;
663c2afad6cSKamil Konieczny bool hx_end = false;
6645318c53dSKrzysztof Kozlowski unsigned long flags;
665b1b4416fSChristoph Manszewski u32 status, st_bits;
66628b62b14SKrzysztof Kozlowski int err;
667a49e490cSVladimir Zapolskiy
668a49e490cSVladimir Zapolskiy spin_lock_irqsave(&dev->lock, flags);
669a49e490cSVladimir Zapolskiy
67028b62b14SKrzysztof Kozlowski /*
67128b62b14SKrzysztof Kozlowski * Handle rx or tx interrupt. If there is still data (scatterlist did not
67228b62b14SKrzysztof Kozlowski * reach end), then map next scatterlist entry.
67328b62b14SKrzysztof Kozlowski * In case of such mapping error, s5p_aes_complete() should be called.
67428b62b14SKrzysztof Kozlowski *
67528b62b14SKrzysztof Kozlowski * If there is no more data in tx scatter list, call s5p_aes_complete()
67628b62b14SKrzysztof Kozlowski * and schedule new tasklet.
677c2afad6cSKamil Konieczny *
678c2afad6cSKamil Konieczny * Handle hx interrupt. If there is still data map next entry.
67928b62b14SKrzysztof Kozlowski */
680a49e490cSVladimir Zapolskiy status = SSS_READ(dev, FCINTSTAT);
681a49e490cSVladimir Zapolskiy if (status & SSS_FCINTSTAT_BRDMAINT)
68228b62b14SKrzysztof Kozlowski err_dma_rx = s5p_aes_rx(dev);
68328b62b14SKrzysztof Kozlowski
68428b62b14SKrzysztof Kozlowski if (status & SSS_FCINTSTAT_BTDMAINT) {
68528b62b14SKrzysztof Kozlowski if (sg_is_last(dev->sg_dst))
68628b62b14SKrzysztof Kozlowski tx_end = true;
68728b62b14SKrzysztof Kozlowski err_dma_tx = s5p_aes_tx(dev);
68828b62b14SKrzysztof Kozlowski }
689a49e490cSVladimir Zapolskiy
690c2afad6cSKamil Konieczny if (status & SSS_FCINTSTAT_HRDMAINT)
691c2afad6cSKamil Konieczny err_dma_hx = s5p_hash_rx(dev);
692c2afad6cSKamil Konieczny
693c2afad6cSKamil Konieczny st_bits = status & (SSS_FCINTSTAT_BRDMAINT | SSS_FCINTSTAT_BTDMAINT |
694c2afad6cSKamil Konieczny SSS_FCINTSTAT_HRDMAINT);
695c2afad6cSKamil Konieczny /* clear DMA bits */
696c2afad6cSKamil Konieczny SSS_WRITE(dev, FCINTPEND, st_bits);
697c2afad6cSKamil Konieczny
698c2afad6cSKamil Konieczny /* clear HASH irq bits */
699c2afad6cSKamil Konieczny if (status & (SSS_FCINTSTAT_HDONEINT | SSS_FCINTSTAT_HPARTINT)) {
700c2afad6cSKamil Konieczny /* cannot have both HPART and HDONE */
701c2afad6cSKamil Konieczny if (status & SSS_FCINTSTAT_HPARTINT)
702c2afad6cSKamil Konieczny st_bits = SSS_HASH_STATUS_PARTIAL_DONE;
703c2afad6cSKamil Konieczny
704c2afad6cSKamil Konieczny if (status & SSS_FCINTSTAT_HDONEINT)
705c2afad6cSKamil Konieczny st_bits = SSS_HASH_STATUS_MSG_DONE;
706c2afad6cSKamil Konieczny
707c2afad6cSKamil Konieczny set_bit(HASH_FLAGS_OUTPUT_READY, &dev->hash_flags);
708c2afad6cSKamil Konieczny s5p_hash_write(dev, SSS_REG_HASH_STATUS, st_bits);
709c2afad6cSKamil Konieczny hx_end = true;
710c2afad6cSKamil Konieczny /* when DONE or PART, do not handle HASH DMA */
711c2afad6cSKamil Konieczny err_dma_hx = 0;
712c2afad6cSKamil Konieczny }
713a49e490cSVladimir Zapolskiy
71428b62b14SKrzysztof Kozlowski if (err_dma_rx < 0) {
71528b62b14SKrzysztof Kozlowski err = err_dma_rx;
71628b62b14SKrzysztof Kozlowski goto error;
71728b62b14SKrzysztof Kozlowski }
71828b62b14SKrzysztof Kozlowski if (err_dma_tx < 0) {
71928b62b14SKrzysztof Kozlowski err = err_dma_tx;
72028b62b14SKrzysztof Kozlowski goto error;
72128b62b14SKrzysztof Kozlowski }
72228b62b14SKrzysztof Kozlowski
72328b62b14SKrzysztof Kozlowski if (tx_end) {
72428b62b14SKrzysztof Kozlowski s5p_sg_done(dev);
725c2afad6cSKamil Konieczny if (err_dma_hx == 1)
726c2afad6cSKamil Konieczny s5p_set_dma_hashdata(dev, dev->hash_sg_iter);
72728b62b14SKrzysztof Kozlowski
72828b62b14SKrzysztof Kozlowski spin_unlock_irqrestore(&dev->lock, flags);
72928b62b14SKrzysztof Kozlowski
7305842cd44SChristoph Manszewski s5p_aes_complete(dev->req, 0);
73142d5c176SKrzysztof Kozlowski /* Device is still busy */
73228b62b14SKrzysztof Kozlowski tasklet_schedule(&dev->tasklet);
73328b62b14SKrzysztof Kozlowski } else {
73479152e8dSKrzysztof Kozlowski /*
73528b62b14SKrzysztof Kozlowski * Writing length of DMA block (either receiving or
73628b62b14SKrzysztof Kozlowski * transmitting) will start the operation immediately, so this
73728b62b14SKrzysztof Kozlowski * should be done at the end (even after clearing pending
73828b62b14SKrzysztof Kozlowski * interrupts to not miss the interrupt).
73979152e8dSKrzysztof Kozlowski */
74028b62b14SKrzysztof Kozlowski if (err_dma_tx == 1)
74179152e8dSKrzysztof Kozlowski s5p_set_dma_outdata(dev, dev->sg_dst);
74228b62b14SKrzysztof Kozlowski if (err_dma_rx == 1)
74379152e8dSKrzysztof Kozlowski s5p_set_dma_indata(dev, dev->sg_src);
744c2afad6cSKamil Konieczny if (err_dma_hx == 1)
745c2afad6cSKamil Konieczny s5p_set_dma_hashdata(dev, dev->hash_sg_iter);
74679152e8dSKrzysztof Kozlowski
747a49e490cSVladimir Zapolskiy spin_unlock_irqrestore(&dev->lock, flags);
74828b62b14SKrzysztof Kozlowski }
74928b62b14SKrzysztof Kozlowski
750c2afad6cSKamil Konieczny goto hash_irq_end;
75128b62b14SKrzysztof Kozlowski
75228b62b14SKrzysztof Kozlowski error:
75328b62b14SKrzysztof Kozlowski s5p_sg_done(dev);
75442d5c176SKrzysztof Kozlowski dev->busy = false;
7555842cd44SChristoph Manszewski req = dev->req;
756c2afad6cSKamil Konieczny if (err_dma_hx == 1)
757c2afad6cSKamil Konieczny s5p_set_dma_hashdata(dev, dev->hash_sg_iter);
758c2afad6cSKamil Konieczny
75928b62b14SKrzysztof Kozlowski spin_unlock_irqrestore(&dev->lock, flags);
7605842cd44SChristoph Manszewski s5p_aes_complete(req, err);
761a49e490cSVladimir Zapolskiy
762c2afad6cSKamil Konieczny hash_irq_end:
763c2afad6cSKamil Konieczny /*
764c2afad6cSKamil Konieczny * Note about else if:
765c2afad6cSKamil Konieczny * when hash_sg_iter reaches end and its UPDATE op,
766c2afad6cSKamil Konieczny * issue SSS_HASH_PAUSE and wait for HPART irq
767c2afad6cSKamil Konieczny */
768c2afad6cSKamil Konieczny if (hx_end)
769c2afad6cSKamil Konieczny tasklet_schedule(&dev->hash_tasklet);
770c2afad6cSKamil Konieczny else if (err_dma_hx == 2)
771c2afad6cSKamil Konieczny s5p_hash_write(dev, SSS_REG_HASH_CTRL_PAUSE,
772c2afad6cSKamil Konieczny SSS_HASH_PAUSE);
773c2afad6cSKamil Konieczny
774a49e490cSVladimir Zapolskiy return IRQ_HANDLED;
775a49e490cSVladimir Zapolskiy }
776a49e490cSVladimir Zapolskiy
777c2afad6cSKamil Konieczny /**
778c2afad6cSKamil Konieczny * s5p_hash_read_msg() - read message or IV from HW
779c2afad6cSKamil Konieczny * @req: AHASH request
780c2afad6cSKamil Konieczny */
s5p_hash_read_msg(struct ahash_request * req)781c2afad6cSKamil Konieczny static void s5p_hash_read_msg(struct ahash_request *req)
782c2afad6cSKamil Konieczny {
783c2afad6cSKamil Konieczny struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
784c2afad6cSKamil Konieczny struct s5p_aes_dev *dd = ctx->dd;
785c2afad6cSKamil Konieczny u32 *hash = (u32 *)ctx->digest;
786c2afad6cSKamil Konieczny unsigned int i;
787c2afad6cSKamil Konieczny
788c2afad6cSKamil Konieczny for (i = 0; i < ctx->nregs; i++)
789c2afad6cSKamil Konieczny hash[i] = s5p_hash_read(dd, SSS_REG_HASH_OUT(i));
790c2afad6cSKamil Konieczny }
791c2afad6cSKamil Konieczny
792c2afad6cSKamil Konieczny /**
793c2afad6cSKamil Konieczny * s5p_hash_write_ctx_iv() - write IV for next partial/finup op.
794c2afad6cSKamil Konieczny * @dd: device
795c2afad6cSKamil Konieczny * @ctx: request context
796c2afad6cSKamil Konieczny */
s5p_hash_write_ctx_iv(struct s5p_aes_dev * dd,const struct s5p_hash_reqctx * ctx)797c2afad6cSKamil Konieczny static void s5p_hash_write_ctx_iv(struct s5p_aes_dev *dd,
7986584eacbSKrzysztof Kozlowski const struct s5p_hash_reqctx *ctx)
799c2afad6cSKamil Konieczny {
8006584eacbSKrzysztof Kozlowski const u32 *hash = (const u32 *)ctx->digest;
801c2afad6cSKamil Konieczny unsigned int i;
802c2afad6cSKamil Konieczny
803c2afad6cSKamil Konieczny for (i = 0; i < ctx->nregs; i++)
804c2afad6cSKamil Konieczny s5p_hash_write(dd, SSS_REG_HASH_IV(i), hash[i]);
805c2afad6cSKamil Konieczny }
806c2afad6cSKamil Konieczny
807c2afad6cSKamil Konieczny /**
808c2afad6cSKamil Konieczny * s5p_hash_write_iv() - write IV for next partial/finup op.
809c2afad6cSKamil Konieczny * @req: AHASH request
810c2afad6cSKamil Konieczny */
s5p_hash_write_iv(struct ahash_request * req)811c2afad6cSKamil Konieczny static void s5p_hash_write_iv(struct ahash_request *req)
812c2afad6cSKamil Konieczny {
813c2afad6cSKamil Konieczny struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
814c2afad6cSKamil Konieczny
815c2afad6cSKamil Konieczny s5p_hash_write_ctx_iv(ctx->dd, ctx);
816c2afad6cSKamil Konieczny }
817c2afad6cSKamil Konieczny
818c2afad6cSKamil Konieczny /**
819c2afad6cSKamil Konieczny * s5p_hash_copy_result() - copy digest into req->result
820c2afad6cSKamil Konieczny * @req: AHASH request
821c2afad6cSKamil Konieczny */
s5p_hash_copy_result(struct ahash_request * req)822c2afad6cSKamil Konieczny static void s5p_hash_copy_result(struct ahash_request *req)
823c2afad6cSKamil Konieczny {
8246584eacbSKrzysztof Kozlowski const struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
825c2afad6cSKamil Konieczny
826c2afad6cSKamil Konieczny if (!req->result)
827c2afad6cSKamil Konieczny return;
828c2afad6cSKamil Konieczny
829c2afad6cSKamil Konieczny memcpy(req->result, ctx->digest, ctx->nregs * HASH_REG_SIZEOF);
830c2afad6cSKamil Konieczny }
831c2afad6cSKamil Konieczny
832c2afad6cSKamil Konieczny /**
833c2afad6cSKamil Konieczny * s5p_hash_dma_flush() - flush HASH DMA
834c2afad6cSKamil Konieczny * @dev: secss device
835c2afad6cSKamil Konieczny */
s5p_hash_dma_flush(struct s5p_aes_dev * dev)836c2afad6cSKamil Konieczny static void s5p_hash_dma_flush(struct s5p_aes_dev *dev)
837c2afad6cSKamil Konieczny {
838c2afad6cSKamil Konieczny SSS_WRITE(dev, FCHRDMAC, SSS_FCHRDMAC_FLUSH);
839c2afad6cSKamil Konieczny }
840c2afad6cSKamil Konieczny
841c2afad6cSKamil Konieczny /**
842c2afad6cSKamil Konieczny * s5p_hash_dma_enable() - enable DMA mode for HASH
843c2afad6cSKamil Konieczny * @dev: secss device
844c2afad6cSKamil Konieczny *
845c2afad6cSKamil Konieczny * enable DMA mode for HASH
846c2afad6cSKamil Konieczny */
s5p_hash_dma_enable(struct s5p_aes_dev * dev)847c2afad6cSKamil Konieczny static void s5p_hash_dma_enable(struct s5p_aes_dev *dev)
848c2afad6cSKamil Konieczny {
849c2afad6cSKamil Konieczny s5p_hash_write(dev, SSS_REG_HASH_CTRL_FIFO, SSS_HASH_FIFO_MODE_DMA);
850c2afad6cSKamil Konieczny }
851c2afad6cSKamil Konieczny
852c2afad6cSKamil Konieczny /**
853c2afad6cSKamil Konieczny * s5p_hash_irq_disable() - disable irq HASH signals
854c2afad6cSKamil Konieczny * @dev: secss device
855c2afad6cSKamil Konieczny * @flags: bitfield with irq's to be disabled
856c2afad6cSKamil Konieczny */
s5p_hash_irq_disable(struct s5p_aes_dev * dev,u32 flags)857c2afad6cSKamil Konieczny static void s5p_hash_irq_disable(struct s5p_aes_dev *dev, u32 flags)
858c2afad6cSKamil Konieczny {
859c2afad6cSKamil Konieczny SSS_WRITE(dev, FCINTENCLR, flags);
860c2afad6cSKamil Konieczny }
861c2afad6cSKamil Konieczny
862c2afad6cSKamil Konieczny /**
863c2afad6cSKamil Konieczny * s5p_hash_irq_enable() - enable irq signals
864c2afad6cSKamil Konieczny * @dev: secss device
865c2afad6cSKamil Konieczny * @flags: bitfield with irq's to be enabled
866c2afad6cSKamil Konieczny */
s5p_hash_irq_enable(struct s5p_aes_dev * dev,int flags)867c2afad6cSKamil Konieczny static void s5p_hash_irq_enable(struct s5p_aes_dev *dev, int flags)
868c2afad6cSKamil Konieczny {
869c2afad6cSKamil Konieczny SSS_WRITE(dev, FCINTENSET, flags);
870c2afad6cSKamil Konieczny }
871c2afad6cSKamil Konieczny
872c2afad6cSKamil Konieczny /**
873c2afad6cSKamil Konieczny * s5p_hash_set_flow() - set flow inside SecSS AES/DES with/without HASH
874c2afad6cSKamil Konieczny * @dev: secss device
875c2afad6cSKamil Konieczny * @hashflow: HASH stream flow with/without crypto AES/DES
876c2afad6cSKamil Konieczny */
s5p_hash_set_flow(struct s5p_aes_dev * dev,u32 hashflow)877c2afad6cSKamil Konieczny static void s5p_hash_set_flow(struct s5p_aes_dev *dev, u32 hashflow)
878c2afad6cSKamil Konieczny {
879c2afad6cSKamil Konieczny unsigned long flags;
880c2afad6cSKamil Konieczny u32 flow;
881c2afad6cSKamil Konieczny
882c2afad6cSKamil Konieczny spin_lock_irqsave(&dev->lock, flags);
883c2afad6cSKamil Konieczny
884c2afad6cSKamil Konieczny flow = SSS_READ(dev, FCFIFOCTRL);
885c2afad6cSKamil Konieczny flow &= ~SSS_HASHIN_MASK;
886c2afad6cSKamil Konieczny flow |= hashflow;
887c2afad6cSKamil Konieczny SSS_WRITE(dev, FCFIFOCTRL, flow);
888c2afad6cSKamil Konieczny
889c2afad6cSKamil Konieczny spin_unlock_irqrestore(&dev->lock, flags);
890c2afad6cSKamil Konieczny }
891c2afad6cSKamil Konieczny
892c2afad6cSKamil Konieczny /**
893c2afad6cSKamil Konieczny * s5p_ahash_dma_init() - enable DMA and set HASH flow inside SecSS
894c2afad6cSKamil Konieczny * @dev: secss device
895c2afad6cSKamil Konieczny * @hashflow: HASH stream flow with/without AES/DES
896c2afad6cSKamil Konieczny *
897c2afad6cSKamil Konieczny * flush HASH DMA and enable DMA, set HASH stream flow inside SecSS HW,
898c2afad6cSKamil Konieczny * enable HASH irq's HRDMA, HDONE, HPART
899c2afad6cSKamil Konieczny */
s5p_ahash_dma_init(struct s5p_aes_dev * dev,u32 hashflow)900c2afad6cSKamil Konieczny static void s5p_ahash_dma_init(struct s5p_aes_dev *dev, u32 hashflow)
901c2afad6cSKamil Konieczny {
902c2afad6cSKamil Konieczny s5p_hash_irq_disable(dev, SSS_FCINTENCLR_HRDMAINTENCLR |
903c2afad6cSKamil Konieczny SSS_FCINTENCLR_HDONEINTENCLR |
904c2afad6cSKamil Konieczny SSS_FCINTENCLR_HPARTINTENCLR);
905c2afad6cSKamil Konieczny s5p_hash_dma_flush(dev);
906c2afad6cSKamil Konieczny
907c2afad6cSKamil Konieczny s5p_hash_dma_enable(dev);
908c2afad6cSKamil Konieczny s5p_hash_set_flow(dev, hashflow & SSS_HASHIN_MASK);
909c2afad6cSKamil Konieczny s5p_hash_irq_enable(dev, SSS_FCINTENSET_HRDMAINTENSET |
910c2afad6cSKamil Konieczny SSS_FCINTENSET_HDONEINTENSET |
911c2afad6cSKamil Konieczny SSS_FCINTENSET_HPARTINTENSET);
912c2afad6cSKamil Konieczny }
913c2afad6cSKamil Konieczny
914c2afad6cSKamil Konieczny /**
915c2afad6cSKamil Konieczny * s5p_hash_write_ctrl() - prepare HASH block in SecSS for processing
916c2afad6cSKamil Konieczny * @dd: secss device
917c2afad6cSKamil Konieczny * @length: length for request
918c2afad6cSKamil Konieczny * @final: true if final op
919c2afad6cSKamil Konieczny *
920c2afad6cSKamil Konieczny * Prepare SSS HASH block for processing bytes in DMA mode. If it is called
921c2afad6cSKamil Konieczny * after previous updates, fill up IV words. For final, calculate and set
922c2afad6cSKamil Konieczny * lengths for HASH so SecSS can finalize hash. For partial, set SSS HASH
923c2afad6cSKamil Konieczny * length as 2^63 so it will be never reached and set to zero prelow and
924c2afad6cSKamil Konieczny * prehigh.
925c2afad6cSKamil Konieczny *
926c2afad6cSKamil Konieczny * This function does not start DMA transfer.
927c2afad6cSKamil Konieczny */
s5p_hash_write_ctrl(struct s5p_aes_dev * dd,size_t length,bool final)928c2afad6cSKamil Konieczny static void s5p_hash_write_ctrl(struct s5p_aes_dev *dd, size_t length,
929c2afad6cSKamil Konieczny bool final)
930c2afad6cSKamil Konieczny {
931c2afad6cSKamil Konieczny struct s5p_hash_reqctx *ctx = ahash_request_ctx(dd->hash_req);
932c2afad6cSKamil Konieczny u32 prelow, prehigh, low, high;
933c2afad6cSKamil Konieczny u32 configflags, swapflags;
934c2afad6cSKamil Konieczny u64 tmplen;
935c2afad6cSKamil Konieczny
936c2afad6cSKamil Konieczny configflags = ctx->engine | SSS_HASH_INIT_BIT;
937c2afad6cSKamil Konieczny
938c2afad6cSKamil Konieczny if (likely(ctx->digcnt)) {
939c2afad6cSKamil Konieczny s5p_hash_write_ctx_iv(dd, ctx);
940c2afad6cSKamil Konieczny configflags |= SSS_HASH_USER_IV_EN;
941c2afad6cSKamil Konieczny }
942c2afad6cSKamil Konieczny
943c2afad6cSKamil Konieczny if (final) {
944c2afad6cSKamil Konieczny /* number of bytes for last part */
945c2afad6cSKamil Konieczny low = length;
946c2afad6cSKamil Konieczny high = 0;
947c2afad6cSKamil Konieczny /* total number of bits prev hashed */
948c2afad6cSKamil Konieczny tmplen = ctx->digcnt * 8;
949c2afad6cSKamil Konieczny prelow = (u32)tmplen;
950c2afad6cSKamil Konieczny prehigh = (u32)(tmplen >> 32);
951c2afad6cSKamil Konieczny } else {
952c2afad6cSKamil Konieczny prelow = 0;
953c2afad6cSKamil Konieczny prehigh = 0;
954c2afad6cSKamil Konieczny low = 0;
955c2afad6cSKamil Konieczny high = BIT(31);
956c2afad6cSKamil Konieczny }
957c2afad6cSKamil Konieczny
958c2afad6cSKamil Konieczny swapflags = SSS_HASH_BYTESWAP_DI | SSS_HASH_BYTESWAP_DO |
959c2afad6cSKamil Konieczny SSS_HASH_BYTESWAP_IV | SSS_HASH_BYTESWAP_KEY;
960c2afad6cSKamil Konieczny
961c2afad6cSKamil Konieczny s5p_hash_write(dd, SSS_REG_HASH_MSG_SIZE_LOW, low);
962c2afad6cSKamil Konieczny s5p_hash_write(dd, SSS_REG_HASH_MSG_SIZE_HIGH, high);
963c2afad6cSKamil Konieczny s5p_hash_write(dd, SSS_REG_HASH_PRE_MSG_SIZE_LOW, prelow);
964c2afad6cSKamil Konieczny s5p_hash_write(dd, SSS_REG_HASH_PRE_MSG_SIZE_HIGH, prehigh);
965c2afad6cSKamil Konieczny
966c2afad6cSKamil Konieczny s5p_hash_write(dd, SSS_REG_HASH_CTRL_SWAP, swapflags);
967c2afad6cSKamil Konieczny s5p_hash_write(dd, SSS_REG_HASH_CTRL, configflags);
968c2afad6cSKamil Konieczny }
969c2afad6cSKamil Konieczny
970c2afad6cSKamil Konieczny /**
971c2afad6cSKamil Konieczny * s5p_hash_xmit_dma() - start DMA hash processing
972c2afad6cSKamil Konieczny * @dd: secss device
973c2afad6cSKamil Konieczny * @length: length for request
974c2afad6cSKamil Konieczny * @final: true if final op
975c2afad6cSKamil Konieczny *
976c2afad6cSKamil Konieczny * Update digcnt here, as it is needed for finup/final op.
977c2afad6cSKamil Konieczny */
s5p_hash_xmit_dma(struct s5p_aes_dev * dd,size_t length,bool final)978c2afad6cSKamil Konieczny static int s5p_hash_xmit_dma(struct s5p_aes_dev *dd, size_t length,
979c2afad6cSKamil Konieczny bool final)
980c2afad6cSKamil Konieczny {
981c2afad6cSKamil Konieczny struct s5p_hash_reqctx *ctx = ahash_request_ctx(dd->hash_req);
982c2afad6cSKamil Konieczny unsigned int cnt;
983c2afad6cSKamil Konieczny
984c2afad6cSKamil Konieczny cnt = dma_map_sg(dd->dev, ctx->sg, ctx->sg_len, DMA_TO_DEVICE);
985c2afad6cSKamil Konieczny if (!cnt) {
986c2afad6cSKamil Konieczny dev_err(dd->dev, "dma_map_sg error\n");
987c2afad6cSKamil Konieczny ctx->error = true;
988c2afad6cSKamil Konieczny return -EINVAL;
989c2afad6cSKamil Konieczny }
990c2afad6cSKamil Konieczny
991c2afad6cSKamil Konieczny set_bit(HASH_FLAGS_DMA_ACTIVE, &dd->hash_flags);
992c2afad6cSKamil Konieczny dd->hash_sg_iter = ctx->sg;
993c2afad6cSKamil Konieczny dd->hash_sg_cnt = cnt;
994c2afad6cSKamil Konieczny s5p_hash_write_ctrl(dd, length, final);
995c2afad6cSKamil Konieczny ctx->digcnt += length;
996c2afad6cSKamil Konieczny ctx->total -= length;
997c2afad6cSKamil Konieczny
998c2afad6cSKamil Konieczny /* catch last interrupt */
999c2afad6cSKamil Konieczny if (final)
1000c2afad6cSKamil Konieczny set_bit(HASH_FLAGS_FINAL, &dd->hash_flags);
1001c2afad6cSKamil Konieczny
1002c2afad6cSKamil Konieczny s5p_set_dma_hashdata(dd, dd->hash_sg_iter); /* DMA starts */
1003c2afad6cSKamil Konieczny
1004c2afad6cSKamil Konieczny return -EINPROGRESS;
1005c2afad6cSKamil Konieczny }
1006c2afad6cSKamil Konieczny
1007c2afad6cSKamil Konieczny /**
1008c2afad6cSKamil Konieczny * s5p_hash_copy_sgs() - copy request's bytes into new buffer
1009c2afad6cSKamil Konieczny * @ctx: request context
1010c2afad6cSKamil Konieczny * @sg: source scatterlist request
1011c2afad6cSKamil Konieczny * @new_len: number of bytes to process from sg
1012c2afad6cSKamil Konieczny *
1013c2afad6cSKamil Konieczny * Allocate new buffer, copy data for HASH into it. If there was xmit_buf
1014c2afad6cSKamil Konieczny * filled, copy it first, then copy data from sg into it. Prepare one sgl[0]
1015c2afad6cSKamil Konieczny * with allocated buffer.
1016c2afad6cSKamil Konieczny *
1017c2afad6cSKamil Konieczny * Set bit in dd->hash_flag so we can free it after irq ends processing.
1018c2afad6cSKamil Konieczny */
s5p_hash_copy_sgs(struct s5p_hash_reqctx * ctx,struct scatterlist * sg,unsigned int new_len)1019c2afad6cSKamil Konieczny static int s5p_hash_copy_sgs(struct s5p_hash_reqctx *ctx,
1020c2afad6cSKamil Konieczny struct scatterlist *sg, unsigned int new_len)
1021c2afad6cSKamil Konieczny {
1022c2afad6cSKamil Konieczny unsigned int pages, len;
1023c2afad6cSKamil Konieczny void *buf;
1024c2afad6cSKamil Konieczny
1025c2afad6cSKamil Konieczny len = new_len + ctx->bufcnt;
1026c2afad6cSKamil Konieczny pages = get_order(len);
1027c2afad6cSKamil Konieczny
1028c2afad6cSKamil Konieczny buf = (void *)__get_free_pages(GFP_ATOMIC, pages);
1029c2afad6cSKamil Konieczny if (!buf) {
1030c2afad6cSKamil Konieczny dev_err(ctx->dd->dev, "alloc pages for unaligned case.\n");
1031c2afad6cSKamil Konieczny ctx->error = true;
1032c2afad6cSKamil Konieczny return -ENOMEM;
1033c2afad6cSKamil Konieczny }
1034c2afad6cSKamil Konieczny
1035c2afad6cSKamil Konieczny if (ctx->bufcnt)
1036c2afad6cSKamil Konieczny memcpy(buf, ctx->dd->xmit_buf, ctx->bufcnt);
1037c2afad6cSKamil Konieczny
1038c2afad6cSKamil Konieczny scatterwalk_map_and_copy(buf + ctx->bufcnt, sg, ctx->skip,
1039c2afad6cSKamil Konieczny new_len, 0);
1040c2afad6cSKamil Konieczny sg_init_table(ctx->sgl, 1);
1041c2afad6cSKamil Konieczny sg_set_buf(ctx->sgl, buf, len);
1042c2afad6cSKamil Konieczny ctx->sg = ctx->sgl;
1043c2afad6cSKamil Konieczny ctx->sg_len = 1;
1044c2afad6cSKamil Konieczny ctx->bufcnt = 0;
1045c2afad6cSKamil Konieczny ctx->skip = 0;
1046c2afad6cSKamil Konieczny set_bit(HASH_FLAGS_SGS_COPIED, &ctx->dd->hash_flags);
1047c2afad6cSKamil Konieczny
1048c2afad6cSKamil Konieczny return 0;
1049c2afad6cSKamil Konieczny }
1050c2afad6cSKamil Konieczny
1051c2afad6cSKamil Konieczny /**
1052c2afad6cSKamil Konieczny * s5p_hash_copy_sg_lists() - copy sg list and make fixes in copy
1053c2afad6cSKamil Konieczny * @ctx: request context
1054c2afad6cSKamil Konieczny * @sg: source scatterlist request
1055c2afad6cSKamil Konieczny * @new_len: number of bytes to process from sg
1056c2afad6cSKamil Konieczny *
1057c2afad6cSKamil Konieczny * Allocate new scatterlist table, copy data for HASH into it. If there was
1058c2afad6cSKamil Konieczny * xmit_buf filled, prepare it first, then copy page, length and offset from
1059c2afad6cSKamil Konieczny * source sg into it, adjusting begin and/or end for skip offset and
1060c2afad6cSKamil Konieczny * hash_later value.
1061c2afad6cSKamil Konieczny *
1062c2afad6cSKamil Konieczny * Resulting sg table will be assigned to ctx->sg. Set flag so we can free
1063c2afad6cSKamil Konieczny * it after irq ends processing.
1064c2afad6cSKamil Konieczny */
s5p_hash_copy_sg_lists(struct s5p_hash_reqctx * ctx,struct scatterlist * sg,unsigned int new_len)1065c2afad6cSKamil Konieczny static int s5p_hash_copy_sg_lists(struct s5p_hash_reqctx *ctx,
1066c2afad6cSKamil Konieczny struct scatterlist *sg, unsigned int new_len)
1067c2afad6cSKamil Konieczny {
1068c2afad6cSKamil Konieczny unsigned int skip = ctx->skip, n = sg_nents(sg);
1069c2afad6cSKamil Konieczny struct scatterlist *tmp;
1070c2afad6cSKamil Konieczny unsigned int len;
1071c2afad6cSKamil Konieczny
1072c2afad6cSKamil Konieczny if (ctx->bufcnt)
1073c2afad6cSKamil Konieczny n++;
1074c2afad6cSKamil Konieczny
1075c2afad6cSKamil Konieczny ctx->sg = kmalloc_array(n, sizeof(*sg), GFP_KERNEL);
1076c2afad6cSKamil Konieczny if (!ctx->sg) {
1077c2afad6cSKamil Konieczny ctx->error = true;
1078c2afad6cSKamil Konieczny return -ENOMEM;
1079c2afad6cSKamil Konieczny }
1080c2afad6cSKamil Konieczny
1081c2afad6cSKamil Konieczny sg_init_table(ctx->sg, n);
1082c2afad6cSKamil Konieczny
1083c2afad6cSKamil Konieczny tmp = ctx->sg;
1084c2afad6cSKamil Konieczny
1085c2afad6cSKamil Konieczny ctx->sg_len = 0;
1086c2afad6cSKamil Konieczny
1087c2afad6cSKamil Konieczny if (ctx->bufcnt) {
1088c2afad6cSKamil Konieczny sg_set_buf(tmp, ctx->dd->xmit_buf, ctx->bufcnt);
1089c2afad6cSKamil Konieczny tmp = sg_next(tmp);
1090c2afad6cSKamil Konieczny ctx->sg_len++;
1091c2afad6cSKamil Konieczny }
1092c2afad6cSKamil Konieczny
1093c2afad6cSKamil Konieczny while (sg && skip >= sg->length) {
1094c2afad6cSKamil Konieczny skip -= sg->length;
1095c2afad6cSKamil Konieczny sg = sg_next(sg);
1096c2afad6cSKamil Konieczny }
1097c2afad6cSKamil Konieczny
1098c2afad6cSKamil Konieczny while (sg && new_len) {
1099c2afad6cSKamil Konieczny len = sg->length - skip;
1100c2afad6cSKamil Konieczny if (new_len < len)
1101c2afad6cSKamil Konieczny len = new_len;
1102c2afad6cSKamil Konieczny
1103c2afad6cSKamil Konieczny new_len -= len;
1104c2afad6cSKamil Konieczny sg_set_page(tmp, sg_page(sg), len, sg->offset + skip);
1105c2afad6cSKamil Konieczny skip = 0;
1106c2afad6cSKamil Konieczny if (new_len <= 0)
1107c2afad6cSKamil Konieczny sg_mark_end(tmp);
1108c2afad6cSKamil Konieczny
1109c2afad6cSKamil Konieczny tmp = sg_next(tmp);
1110c2afad6cSKamil Konieczny ctx->sg_len++;
1111c2afad6cSKamil Konieczny sg = sg_next(sg);
1112c2afad6cSKamil Konieczny }
1113c2afad6cSKamil Konieczny
1114c2afad6cSKamil Konieczny set_bit(HASH_FLAGS_SGS_ALLOCED, &ctx->dd->hash_flags);
1115c2afad6cSKamil Konieczny
1116c2afad6cSKamil Konieczny return 0;
1117c2afad6cSKamil Konieczny }
1118c2afad6cSKamil Konieczny
1119c2afad6cSKamil Konieczny /**
1120c2afad6cSKamil Konieczny * s5p_hash_prepare_sgs() - prepare sg for processing
1121c2afad6cSKamil Konieczny * @ctx: request context
1122c2afad6cSKamil Konieczny * @sg: source scatterlist request
112398a6bc10SKrzysztof Kozlowski * @new_len: number of bytes to process from sg
1124c2afad6cSKamil Konieczny * @final: final flag
1125c2afad6cSKamil Konieczny *
1126c2afad6cSKamil Konieczny * Check two conditions: (1) if buffers in sg have len aligned data, and (2)
1127c2afad6cSKamil Konieczny * sg table have good aligned elements (list_ok). If one of this checks fails,
1128c2afad6cSKamil Konieczny * then either (1) allocates new buffer for data with s5p_hash_copy_sgs, copy
1129c2afad6cSKamil Konieczny * data into this buffer and prepare request in sgl, or (2) allocates new sg
1130c2afad6cSKamil Konieczny * table and prepare sg elements.
1131c2afad6cSKamil Konieczny *
1132c2afad6cSKamil Konieczny * For digest or finup all conditions can be good, and we may not need any
1133c2afad6cSKamil Konieczny * fixes.
1134c2afad6cSKamil Konieczny */
s5p_hash_prepare_sgs(struct s5p_hash_reqctx * ctx,struct scatterlist * sg,unsigned int new_len,bool final)1135c2afad6cSKamil Konieczny static int s5p_hash_prepare_sgs(struct s5p_hash_reqctx *ctx,
1136c2afad6cSKamil Konieczny struct scatterlist *sg,
1137c2afad6cSKamil Konieczny unsigned int new_len, bool final)
1138c2afad6cSKamil Konieczny {
1139c2afad6cSKamil Konieczny unsigned int skip = ctx->skip, nbytes = new_len, n = 0;
1140c2afad6cSKamil Konieczny bool aligned = true, list_ok = true;
1141c2afad6cSKamil Konieczny struct scatterlist *sg_tmp = sg;
1142c2afad6cSKamil Konieczny
1143c2afad6cSKamil Konieczny if (!sg || !sg->length || !new_len)
1144c2afad6cSKamil Konieczny return 0;
1145c2afad6cSKamil Konieczny
1146c2afad6cSKamil Konieczny if (skip || !final)
1147c2afad6cSKamil Konieczny list_ok = false;
1148c2afad6cSKamil Konieczny
1149c2afad6cSKamil Konieczny while (nbytes > 0 && sg_tmp) {
1150c2afad6cSKamil Konieczny n++;
1151c2afad6cSKamil Konieczny if (skip >= sg_tmp->length) {
1152c2afad6cSKamil Konieczny skip -= sg_tmp->length;
1153c2afad6cSKamil Konieczny if (!sg_tmp->length) {
1154c2afad6cSKamil Konieczny aligned = false;
1155c2afad6cSKamil Konieczny break;
1156c2afad6cSKamil Konieczny }
1157c2afad6cSKamil Konieczny } else {
1158c2afad6cSKamil Konieczny if (!IS_ALIGNED(sg_tmp->length - skip, BUFLEN)) {
1159c2afad6cSKamil Konieczny aligned = false;
1160c2afad6cSKamil Konieczny break;
1161c2afad6cSKamil Konieczny }
1162c2afad6cSKamil Konieczny
1163c2afad6cSKamil Konieczny if (nbytes < sg_tmp->length - skip) {
1164c2afad6cSKamil Konieczny list_ok = false;
1165c2afad6cSKamil Konieczny break;
1166c2afad6cSKamil Konieczny }
1167c2afad6cSKamil Konieczny
1168c2afad6cSKamil Konieczny nbytes -= sg_tmp->length - skip;
1169c2afad6cSKamil Konieczny skip = 0;
1170c2afad6cSKamil Konieczny }
1171c2afad6cSKamil Konieczny
1172c2afad6cSKamil Konieczny sg_tmp = sg_next(sg_tmp);
1173c2afad6cSKamil Konieczny }
1174c2afad6cSKamil Konieczny
1175c2afad6cSKamil Konieczny if (!aligned)
1176c2afad6cSKamil Konieczny return s5p_hash_copy_sgs(ctx, sg, new_len);
1177c2afad6cSKamil Konieczny else if (!list_ok)
1178c2afad6cSKamil Konieczny return s5p_hash_copy_sg_lists(ctx, sg, new_len);
1179c2afad6cSKamil Konieczny
1180c2afad6cSKamil Konieczny /*
1181c2afad6cSKamil Konieczny * Have aligned data from previous operation and/or current
1182c2afad6cSKamil Konieczny * Note: will enter here only if (digest or finup) and aligned
1183c2afad6cSKamil Konieczny */
1184c2afad6cSKamil Konieczny if (ctx->bufcnt) {
1185c2afad6cSKamil Konieczny ctx->sg_len = n;
1186c2afad6cSKamil Konieczny sg_init_table(ctx->sgl, 2);
1187c2afad6cSKamil Konieczny sg_set_buf(ctx->sgl, ctx->dd->xmit_buf, ctx->bufcnt);
1188c2afad6cSKamil Konieczny sg_chain(ctx->sgl, 2, sg);
1189c2afad6cSKamil Konieczny ctx->sg = ctx->sgl;
1190c2afad6cSKamil Konieczny ctx->sg_len++;
1191c2afad6cSKamil Konieczny } else {
1192c2afad6cSKamil Konieczny ctx->sg = sg;
1193c2afad6cSKamil Konieczny ctx->sg_len = n;
1194c2afad6cSKamil Konieczny }
1195c2afad6cSKamil Konieczny
1196c2afad6cSKamil Konieczny return 0;
1197c2afad6cSKamil Konieczny }
1198c2afad6cSKamil Konieczny
1199c2afad6cSKamil Konieczny /**
1200c2afad6cSKamil Konieczny * s5p_hash_prepare_request() - prepare request for processing
1201c2afad6cSKamil Konieczny * @req: AHASH request
1202c2afad6cSKamil Konieczny * @update: true if UPDATE op
1203c2afad6cSKamil Konieczny *
1204c2afad6cSKamil Konieczny * Note 1: we can have update flag _and_ final flag at the same time.
1205c2afad6cSKamil Konieczny * Note 2: we enter here when digcnt > BUFLEN (=HASH_BLOCK_SIZE) or
1206c2afad6cSKamil Konieczny * either req->nbytes or ctx->bufcnt + req->nbytes is > BUFLEN or
1207c2afad6cSKamil Konieczny * we have final op
1208c2afad6cSKamil Konieczny */
s5p_hash_prepare_request(struct ahash_request * req,bool update)1209c2afad6cSKamil Konieczny static int s5p_hash_prepare_request(struct ahash_request *req, bool update)
1210c2afad6cSKamil Konieczny {
1211c2afad6cSKamil Konieczny struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
1212c2afad6cSKamil Konieczny bool final = ctx->finup;
1213c2afad6cSKamil Konieczny int xmit_len, hash_later, nbytes;
1214c2afad6cSKamil Konieczny int ret;
1215c2afad6cSKamil Konieczny
1216c2afad6cSKamil Konieczny if (update)
1217c2afad6cSKamil Konieczny nbytes = req->nbytes;
1218c2afad6cSKamil Konieczny else
1219c2afad6cSKamil Konieczny nbytes = 0;
1220c2afad6cSKamil Konieczny
1221c2afad6cSKamil Konieczny ctx->total = nbytes + ctx->bufcnt;
1222c2afad6cSKamil Konieczny if (!ctx->total)
1223c2afad6cSKamil Konieczny return 0;
1224c2afad6cSKamil Konieczny
1225c2afad6cSKamil Konieczny if (nbytes && (!IS_ALIGNED(ctx->bufcnt, BUFLEN))) {
1226c2afad6cSKamil Konieczny /* bytes left from previous request, so fill up to BUFLEN */
1227c2afad6cSKamil Konieczny int len = BUFLEN - ctx->bufcnt % BUFLEN;
1228c2afad6cSKamil Konieczny
1229c2afad6cSKamil Konieczny if (len > nbytes)
1230c2afad6cSKamil Konieczny len = nbytes;
1231c2afad6cSKamil Konieczny
1232c2afad6cSKamil Konieczny scatterwalk_map_and_copy(ctx->buffer + ctx->bufcnt, req->src,
1233c2afad6cSKamil Konieczny 0, len, 0);
1234c2afad6cSKamil Konieczny ctx->bufcnt += len;
1235c2afad6cSKamil Konieczny nbytes -= len;
1236c2afad6cSKamil Konieczny ctx->skip = len;
1237c2afad6cSKamil Konieczny } else {
1238c2afad6cSKamil Konieczny ctx->skip = 0;
1239c2afad6cSKamil Konieczny }
1240c2afad6cSKamil Konieczny
1241c2afad6cSKamil Konieczny if (ctx->bufcnt)
1242c2afad6cSKamil Konieczny memcpy(ctx->dd->xmit_buf, ctx->buffer, ctx->bufcnt);
1243c2afad6cSKamil Konieczny
1244c2afad6cSKamil Konieczny xmit_len = ctx->total;
1245c2afad6cSKamil Konieczny if (final) {
1246c2afad6cSKamil Konieczny hash_later = 0;
1247c2afad6cSKamil Konieczny } else {
1248c2afad6cSKamil Konieczny if (IS_ALIGNED(xmit_len, BUFLEN))
1249c2afad6cSKamil Konieczny xmit_len -= BUFLEN;
1250c2afad6cSKamil Konieczny else
1251c2afad6cSKamil Konieczny xmit_len -= xmit_len & (BUFLEN - 1);
1252c2afad6cSKamil Konieczny
1253c2afad6cSKamil Konieczny hash_later = ctx->total - xmit_len;
1254c2afad6cSKamil Konieczny /* copy hash_later bytes from end of req->src */
1255c2afad6cSKamil Konieczny /* previous bytes are in xmit_buf, so no overwrite */
1256c2afad6cSKamil Konieczny scatterwalk_map_and_copy(ctx->buffer, req->src,
1257c2afad6cSKamil Konieczny req->nbytes - hash_later,
1258c2afad6cSKamil Konieczny hash_later, 0);
1259c2afad6cSKamil Konieczny }
1260c2afad6cSKamil Konieczny
1261c2afad6cSKamil Konieczny if (xmit_len > BUFLEN) {
1262c2afad6cSKamil Konieczny ret = s5p_hash_prepare_sgs(ctx, req->src, nbytes - hash_later,
1263c2afad6cSKamil Konieczny final);
1264c2afad6cSKamil Konieczny if (ret)
1265c2afad6cSKamil Konieczny return ret;
1266c2afad6cSKamil Konieczny } else {
1267c2afad6cSKamil Konieczny /* have buffered data only */
1268c2afad6cSKamil Konieczny if (unlikely(!ctx->bufcnt)) {
1269c2afad6cSKamil Konieczny /* first update didn't fill up buffer */
1270c2afad6cSKamil Konieczny scatterwalk_map_and_copy(ctx->dd->xmit_buf, req->src,
1271c2afad6cSKamil Konieczny 0, xmit_len, 0);
1272c2afad6cSKamil Konieczny }
1273c2afad6cSKamil Konieczny
1274c2afad6cSKamil Konieczny sg_init_table(ctx->sgl, 1);
1275c2afad6cSKamil Konieczny sg_set_buf(ctx->sgl, ctx->dd->xmit_buf, xmit_len);
1276c2afad6cSKamil Konieczny
1277c2afad6cSKamil Konieczny ctx->sg = ctx->sgl;
1278c2afad6cSKamil Konieczny ctx->sg_len = 1;
1279c2afad6cSKamil Konieczny }
1280c2afad6cSKamil Konieczny
1281c2afad6cSKamil Konieczny ctx->bufcnt = hash_later;
1282c2afad6cSKamil Konieczny if (!final)
1283c2afad6cSKamil Konieczny ctx->total = xmit_len;
1284c2afad6cSKamil Konieczny
1285c2afad6cSKamil Konieczny return 0;
1286c2afad6cSKamil Konieczny }
1287c2afad6cSKamil Konieczny
1288c2afad6cSKamil Konieczny /**
1289c2afad6cSKamil Konieczny * s5p_hash_update_dma_stop() - unmap DMA
1290c2afad6cSKamil Konieczny * @dd: secss device
1291c2afad6cSKamil Konieczny *
1292c2afad6cSKamil Konieczny * Unmap scatterlist ctx->sg.
1293c2afad6cSKamil Konieczny */
s5p_hash_update_dma_stop(struct s5p_aes_dev * dd)1294c2afad6cSKamil Konieczny static void s5p_hash_update_dma_stop(struct s5p_aes_dev *dd)
1295c2afad6cSKamil Konieczny {
12966584eacbSKrzysztof Kozlowski const struct s5p_hash_reqctx *ctx = ahash_request_ctx(dd->hash_req);
1297c2afad6cSKamil Konieczny
1298c2afad6cSKamil Konieczny dma_unmap_sg(dd->dev, ctx->sg, ctx->sg_len, DMA_TO_DEVICE);
1299c2afad6cSKamil Konieczny clear_bit(HASH_FLAGS_DMA_ACTIVE, &dd->hash_flags);
1300c2afad6cSKamil Konieczny }
1301c2afad6cSKamil Konieczny
1302c2afad6cSKamil Konieczny /**
1303c2afad6cSKamil Konieczny * s5p_hash_finish() - copy calculated digest to crypto layer
1304c2afad6cSKamil Konieczny * @req: AHASH request
1305c2afad6cSKamil Konieczny */
s5p_hash_finish(struct ahash_request * req)1306c2afad6cSKamil Konieczny static void s5p_hash_finish(struct ahash_request *req)
1307c2afad6cSKamil Konieczny {
1308c2afad6cSKamil Konieczny struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
1309c2afad6cSKamil Konieczny struct s5p_aes_dev *dd = ctx->dd;
1310c2afad6cSKamil Konieczny
1311c2afad6cSKamil Konieczny if (ctx->digcnt)
1312c2afad6cSKamil Konieczny s5p_hash_copy_result(req);
1313c2afad6cSKamil Konieczny
1314c2afad6cSKamil Konieczny dev_dbg(dd->dev, "hash_finish digcnt: %lld\n", ctx->digcnt);
1315c2afad6cSKamil Konieczny }
1316c2afad6cSKamil Konieczny
1317c2afad6cSKamil Konieczny /**
1318c2afad6cSKamil Konieczny * s5p_hash_finish_req() - finish request
1319c2afad6cSKamil Konieczny * @req: AHASH request
1320c2afad6cSKamil Konieczny * @err: error
1321c2afad6cSKamil Konieczny */
s5p_hash_finish_req(struct ahash_request * req,int err)1322c2afad6cSKamil Konieczny static void s5p_hash_finish_req(struct ahash_request *req, int err)
1323c2afad6cSKamil Konieczny {
1324c2afad6cSKamil Konieczny struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
1325c2afad6cSKamil Konieczny struct s5p_aes_dev *dd = ctx->dd;
1326c2afad6cSKamil Konieczny unsigned long flags;
1327c2afad6cSKamil Konieczny
1328c2afad6cSKamil Konieczny if (test_bit(HASH_FLAGS_SGS_COPIED, &dd->hash_flags))
1329c2afad6cSKamil Konieczny free_pages((unsigned long)sg_virt(ctx->sg),
1330c2afad6cSKamil Konieczny get_order(ctx->sg->length));
1331c2afad6cSKamil Konieczny
1332c2afad6cSKamil Konieczny if (test_bit(HASH_FLAGS_SGS_ALLOCED, &dd->hash_flags))
1333c2afad6cSKamil Konieczny kfree(ctx->sg);
1334c2afad6cSKamil Konieczny
1335c2afad6cSKamil Konieczny ctx->sg = NULL;
1336c2afad6cSKamil Konieczny dd->hash_flags &= ~(BIT(HASH_FLAGS_SGS_ALLOCED) |
1337c2afad6cSKamil Konieczny BIT(HASH_FLAGS_SGS_COPIED));
1338c2afad6cSKamil Konieczny
1339c2afad6cSKamil Konieczny if (!err && !ctx->error) {
1340c2afad6cSKamil Konieczny s5p_hash_read_msg(req);
1341c2afad6cSKamil Konieczny if (test_bit(HASH_FLAGS_FINAL, &dd->hash_flags))
1342c2afad6cSKamil Konieczny s5p_hash_finish(req);
1343c2afad6cSKamil Konieczny } else {
1344c2afad6cSKamil Konieczny ctx->error = true;
1345c2afad6cSKamil Konieczny }
1346c2afad6cSKamil Konieczny
1347c2afad6cSKamil Konieczny spin_lock_irqsave(&dd->hash_lock, flags);
1348c2afad6cSKamil Konieczny dd->hash_flags &= ~(BIT(HASH_FLAGS_BUSY) | BIT(HASH_FLAGS_FINAL) |
1349c2afad6cSKamil Konieczny BIT(HASH_FLAGS_DMA_READY) |
1350c2afad6cSKamil Konieczny BIT(HASH_FLAGS_OUTPUT_READY));
1351c2afad6cSKamil Konieczny spin_unlock_irqrestore(&dd->hash_lock, flags);
1352c2afad6cSKamil Konieczny
1353c2afad6cSKamil Konieczny if (req->base.complete)
1354e94c1c9bSHerbert Xu ahash_request_complete(req, err);
1355c2afad6cSKamil Konieczny }
1356c2afad6cSKamil Konieczny
1357c2afad6cSKamil Konieczny /**
1358c2afad6cSKamil Konieczny * s5p_hash_handle_queue() - handle hash queue
1359c2afad6cSKamil Konieczny * @dd: device s5p_aes_dev
1360c2afad6cSKamil Konieczny * @req: AHASH request
1361c2afad6cSKamil Konieczny *
1362c2afad6cSKamil Konieczny * If req!=NULL enqueue it on dd->queue, if FLAGS_BUSY is not set on the
1363c2afad6cSKamil Konieczny * device then processes the first request from the dd->queue
1364c2afad6cSKamil Konieczny *
1365c2afad6cSKamil Konieczny * Returns: see s5p_hash_final below.
1366c2afad6cSKamil Konieczny */
s5p_hash_handle_queue(struct s5p_aes_dev * dd,struct ahash_request * req)1367c2afad6cSKamil Konieczny static int s5p_hash_handle_queue(struct s5p_aes_dev *dd,
1368c2afad6cSKamil Konieczny struct ahash_request *req)
1369c2afad6cSKamil Konieczny {
1370c2afad6cSKamil Konieczny struct crypto_async_request *async_req, *backlog;
1371c2afad6cSKamil Konieczny struct s5p_hash_reqctx *ctx;
1372c2afad6cSKamil Konieczny unsigned long flags;
1373c2afad6cSKamil Konieczny int err = 0, ret = 0;
1374c2afad6cSKamil Konieczny
1375c2afad6cSKamil Konieczny retry:
1376c2afad6cSKamil Konieczny spin_lock_irqsave(&dd->hash_lock, flags);
1377c2afad6cSKamil Konieczny if (req)
1378c2afad6cSKamil Konieczny ret = ahash_enqueue_request(&dd->hash_queue, req);
1379c2afad6cSKamil Konieczny
1380c2afad6cSKamil Konieczny if (test_bit(HASH_FLAGS_BUSY, &dd->hash_flags)) {
1381c2afad6cSKamil Konieczny spin_unlock_irqrestore(&dd->hash_lock, flags);
1382c2afad6cSKamil Konieczny return ret;
1383c2afad6cSKamil Konieczny }
1384c2afad6cSKamil Konieczny
1385c2afad6cSKamil Konieczny backlog = crypto_get_backlog(&dd->hash_queue);
1386c2afad6cSKamil Konieczny async_req = crypto_dequeue_request(&dd->hash_queue);
1387c2afad6cSKamil Konieczny if (async_req)
1388c2afad6cSKamil Konieczny set_bit(HASH_FLAGS_BUSY, &dd->hash_flags);
1389c2afad6cSKamil Konieczny
1390c2afad6cSKamil Konieczny spin_unlock_irqrestore(&dd->hash_lock, flags);
1391c2afad6cSKamil Konieczny
1392c2afad6cSKamil Konieczny if (!async_req)
1393c2afad6cSKamil Konieczny return ret;
1394c2afad6cSKamil Konieczny
1395c2afad6cSKamil Konieczny if (backlog)
1396e94c1c9bSHerbert Xu crypto_request_complete(backlog, -EINPROGRESS);
1397c2afad6cSKamil Konieczny
1398c2afad6cSKamil Konieczny req = ahash_request_cast(async_req);
1399c2afad6cSKamil Konieczny dd->hash_req = req;
1400c2afad6cSKamil Konieczny ctx = ahash_request_ctx(req);
1401c2afad6cSKamil Konieczny
1402c2afad6cSKamil Konieczny err = s5p_hash_prepare_request(req, ctx->op_update);
1403c2afad6cSKamil Konieczny if (err || !ctx->total)
1404c2afad6cSKamil Konieczny goto out;
1405c2afad6cSKamil Konieczny
1406c2afad6cSKamil Konieczny dev_dbg(dd->dev, "handling new req, op_update: %u, nbytes: %d\n",
1407c2afad6cSKamil Konieczny ctx->op_update, req->nbytes);
1408c2afad6cSKamil Konieczny
1409c2afad6cSKamil Konieczny s5p_ahash_dma_init(dd, SSS_HASHIN_INDEPENDENT);
1410c2afad6cSKamil Konieczny if (ctx->digcnt)
1411c2afad6cSKamil Konieczny s5p_hash_write_iv(req); /* restore hash IV */
1412c2afad6cSKamil Konieczny
1413c2afad6cSKamil Konieczny if (ctx->op_update) { /* HASH_OP_UPDATE */
1414c2afad6cSKamil Konieczny err = s5p_hash_xmit_dma(dd, ctx->total, ctx->finup);
1415c2afad6cSKamil Konieczny if (err != -EINPROGRESS && ctx->finup && !ctx->error)
1416c2afad6cSKamil Konieczny /* no final() after finup() */
1417c2afad6cSKamil Konieczny err = s5p_hash_xmit_dma(dd, ctx->total, true);
1418c2afad6cSKamil Konieczny } else { /* HASH_OP_FINAL */
1419c2afad6cSKamil Konieczny err = s5p_hash_xmit_dma(dd, ctx->total, true);
1420c2afad6cSKamil Konieczny }
1421c2afad6cSKamil Konieczny out:
1422c2afad6cSKamil Konieczny if (err != -EINPROGRESS) {
1423c2afad6cSKamil Konieczny /* hash_tasklet_cb will not finish it, so do it here */
1424c2afad6cSKamil Konieczny s5p_hash_finish_req(req, err);
1425c2afad6cSKamil Konieczny req = NULL;
1426c2afad6cSKamil Konieczny
1427c2afad6cSKamil Konieczny /*
1428c2afad6cSKamil Konieczny * Execute next request immediately if there is anything
1429c2afad6cSKamil Konieczny * in queue.
1430c2afad6cSKamil Konieczny */
1431c2afad6cSKamil Konieczny goto retry;
1432c2afad6cSKamil Konieczny }
1433c2afad6cSKamil Konieczny
1434c2afad6cSKamil Konieczny return ret;
1435c2afad6cSKamil Konieczny }
1436c2afad6cSKamil Konieczny
1437c2afad6cSKamil Konieczny /**
1438c2afad6cSKamil Konieczny * s5p_hash_tasklet_cb() - hash tasklet
1439c2afad6cSKamil Konieczny * @data: ptr to s5p_aes_dev
1440c2afad6cSKamil Konieczny */
s5p_hash_tasklet_cb(unsigned long data)1441c2afad6cSKamil Konieczny static void s5p_hash_tasklet_cb(unsigned long data)
1442c2afad6cSKamil Konieczny {
1443c2afad6cSKamil Konieczny struct s5p_aes_dev *dd = (struct s5p_aes_dev *)data;
1444c2afad6cSKamil Konieczny
1445c2afad6cSKamil Konieczny if (!test_bit(HASH_FLAGS_BUSY, &dd->hash_flags)) {
1446c2afad6cSKamil Konieczny s5p_hash_handle_queue(dd, NULL);
1447c2afad6cSKamil Konieczny return;
1448c2afad6cSKamil Konieczny }
1449c2afad6cSKamil Konieczny
1450c2afad6cSKamil Konieczny if (test_bit(HASH_FLAGS_DMA_READY, &dd->hash_flags)) {
1451c2afad6cSKamil Konieczny if (test_and_clear_bit(HASH_FLAGS_DMA_ACTIVE,
1452c2afad6cSKamil Konieczny &dd->hash_flags)) {
1453c2afad6cSKamil Konieczny s5p_hash_update_dma_stop(dd);
1454c2afad6cSKamil Konieczny }
1455c2afad6cSKamil Konieczny
1456c2afad6cSKamil Konieczny if (test_and_clear_bit(HASH_FLAGS_OUTPUT_READY,
1457c2afad6cSKamil Konieczny &dd->hash_flags)) {
1458c2afad6cSKamil Konieczny /* hash or semi-hash ready */
1459c2afad6cSKamil Konieczny clear_bit(HASH_FLAGS_DMA_READY, &dd->hash_flags);
1460c2afad6cSKamil Konieczny goto finish;
1461c2afad6cSKamil Konieczny }
1462c2afad6cSKamil Konieczny }
1463c2afad6cSKamil Konieczny
1464c2afad6cSKamil Konieczny return;
1465c2afad6cSKamil Konieczny
1466c2afad6cSKamil Konieczny finish:
1467c2afad6cSKamil Konieczny /* finish curent request */
1468c2afad6cSKamil Konieczny s5p_hash_finish_req(dd->hash_req, 0);
1469c2afad6cSKamil Konieczny
1470c2afad6cSKamil Konieczny /* If we are not busy, process next req */
1471c2afad6cSKamil Konieczny if (!test_bit(HASH_FLAGS_BUSY, &dd->hash_flags))
1472c2afad6cSKamil Konieczny s5p_hash_handle_queue(dd, NULL);
1473c2afad6cSKamil Konieczny }
1474c2afad6cSKamil Konieczny
1475c2afad6cSKamil Konieczny /**
1476c2afad6cSKamil Konieczny * s5p_hash_enqueue() - enqueue request
1477c2afad6cSKamil Konieczny * @req: AHASH request
1478c2afad6cSKamil Konieczny * @op: operation UPDATE (true) or FINAL (false)
1479c2afad6cSKamil Konieczny *
1480c2afad6cSKamil Konieczny * Returns: see s5p_hash_final below.
1481c2afad6cSKamil Konieczny */
s5p_hash_enqueue(struct ahash_request * req,bool op)1482c2afad6cSKamil Konieczny static int s5p_hash_enqueue(struct ahash_request *req, bool op)
1483c2afad6cSKamil Konieczny {
1484c2afad6cSKamil Konieczny struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
1485c2afad6cSKamil Konieczny struct s5p_hash_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
1486c2afad6cSKamil Konieczny
1487c2afad6cSKamil Konieczny ctx->op_update = op;
1488c2afad6cSKamil Konieczny
1489c2afad6cSKamil Konieczny return s5p_hash_handle_queue(tctx->dd, req);
1490c2afad6cSKamil Konieczny }
1491c2afad6cSKamil Konieczny
1492c2afad6cSKamil Konieczny /**
1493c2afad6cSKamil Konieczny * s5p_hash_update() - process the hash input data
1494c2afad6cSKamil Konieczny * @req: AHASH request
1495c2afad6cSKamil Konieczny *
1496c2afad6cSKamil Konieczny * If request will fit in buffer, copy it and return immediately
1497c2afad6cSKamil Konieczny * else enqueue it with OP_UPDATE.
1498c2afad6cSKamil Konieczny *
1499c2afad6cSKamil Konieczny * Returns: see s5p_hash_final below.
1500c2afad6cSKamil Konieczny */
s5p_hash_update(struct ahash_request * req)1501c2afad6cSKamil Konieczny static int s5p_hash_update(struct ahash_request *req)
1502c2afad6cSKamil Konieczny {
1503c2afad6cSKamil Konieczny struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
1504c2afad6cSKamil Konieczny
1505c2afad6cSKamil Konieczny if (!req->nbytes)
1506c2afad6cSKamil Konieczny return 0;
1507c2afad6cSKamil Konieczny
1508c2afad6cSKamil Konieczny if (ctx->bufcnt + req->nbytes <= BUFLEN) {
1509c2afad6cSKamil Konieczny scatterwalk_map_and_copy(ctx->buffer + ctx->bufcnt, req->src,
1510c2afad6cSKamil Konieczny 0, req->nbytes, 0);
1511c2afad6cSKamil Konieczny ctx->bufcnt += req->nbytes;
1512c2afad6cSKamil Konieczny return 0;
1513c2afad6cSKamil Konieczny }
1514c2afad6cSKamil Konieczny
1515c2afad6cSKamil Konieczny return s5p_hash_enqueue(req, true); /* HASH_OP_UPDATE */
1516c2afad6cSKamil Konieczny }
1517c2afad6cSKamil Konieczny
1518c2afad6cSKamil Konieczny /**
1519c2afad6cSKamil Konieczny * s5p_hash_final() - close up hash and calculate digest
1520c2afad6cSKamil Konieczny * @req: AHASH request
1521c2afad6cSKamil Konieczny *
1522c2afad6cSKamil Konieczny * Note: in final req->src do not have any data, and req->nbytes can be
1523c2afad6cSKamil Konieczny * non-zero.
1524c2afad6cSKamil Konieczny *
1525c2afad6cSKamil Konieczny * If there were no input data processed yet and the buffered hash data is
1526c2afad6cSKamil Konieczny * less than BUFLEN (64) then calculate the final hash immediately by using
1527c2afad6cSKamil Konieczny * SW algorithm fallback.
1528c2afad6cSKamil Konieczny *
1529c2afad6cSKamil Konieczny * Otherwise enqueues the current AHASH request with OP_FINAL operation op
1530c2afad6cSKamil Konieczny * and finalize hash message in HW. Note that if digcnt!=0 then there were
1531c2afad6cSKamil Konieczny * previous update op, so there are always some buffered bytes in ctx->buffer,
1532c2afad6cSKamil Konieczny * which means that ctx->bufcnt!=0
1533c2afad6cSKamil Konieczny *
1534c2afad6cSKamil Konieczny * Returns:
1535c2afad6cSKamil Konieczny * 0 if the request has been processed immediately,
1536c2afad6cSKamil Konieczny * -EINPROGRESS if the operation has been queued for later execution or is set
1537c2afad6cSKamil Konieczny * to processing by HW,
1538c2afad6cSKamil Konieczny * -EBUSY if queue is full and request should be resubmitted later,
1539c2afad6cSKamil Konieczny * other negative values denotes an error.
1540c2afad6cSKamil Konieczny */
s5p_hash_final(struct ahash_request * req)1541c2afad6cSKamil Konieczny static int s5p_hash_final(struct ahash_request *req)
1542c2afad6cSKamil Konieczny {
1543c2afad6cSKamil Konieczny struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
1544c2afad6cSKamil Konieczny
1545c2afad6cSKamil Konieczny ctx->finup = true;
1546c2afad6cSKamil Konieczny if (ctx->error)
1547c2afad6cSKamil Konieczny return -EINVAL; /* uncompleted hash is not needed */
1548c2afad6cSKamil Konieczny
1549ecca1ad6SEric Biggers if (!ctx->digcnt && ctx->bufcnt < BUFLEN) {
1550ecca1ad6SEric Biggers struct s5p_hash_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
1551ecca1ad6SEric Biggers
1552ecca1ad6SEric Biggers return crypto_shash_tfm_digest(tctx->fallback, ctx->buffer,
1553ecca1ad6SEric Biggers ctx->bufcnt, req->result);
1554ecca1ad6SEric Biggers }
1555c2afad6cSKamil Konieczny
1556c2afad6cSKamil Konieczny return s5p_hash_enqueue(req, false); /* HASH_OP_FINAL */
1557c2afad6cSKamil Konieczny }
1558c2afad6cSKamil Konieczny
1559c2afad6cSKamil Konieczny /**
1560c2afad6cSKamil Konieczny * s5p_hash_finup() - process last req->src and calculate digest
1561c2afad6cSKamil Konieczny * @req: AHASH request containing the last update data
1562c2afad6cSKamil Konieczny *
1563c2afad6cSKamil Konieczny * Return values: see s5p_hash_final above.
1564c2afad6cSKamil Konieczny */
s5p_hash_finup(struct ahash_request * req)1565c2afad6cSKamil Konieczny static int s5p_hash_finup(struct ahash_request *req)
1566c2afad6cSKamil Konieczny {
1567c2afad6cSKamil Konieczny struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
1568c2afad6cSKamil Konieczny int err1, err2;
1569c2afad6cSKamil Konieczny
1570c2afad6cSKamil Konieczny ctx->finup = true;
1571c2afad6cSKamil Konieczny
1572c2afad6cSKamil Konieczny err1 = s5p_hash_update(req);
1573c2afad6cSKamil Konieczny if (err1 == -EINPROGRESS || err1 == -EBUSY)
1574c2afad6cSKamil Konieczny return err1;
1575c2afad6cSKamil Konieczny
1576c2afad6cSKamil Konieczny /*
1577c2afad6cSKamil Konieczny * final() has to be always called to cleanup resources even if
1578c2afad6cSKamil Konieczny * update() failed, except EINPROGRESS or calculate digest for small
1579c2afad6cSKamil Konieczny * size
1580c2afad6cSKamil Konieczny */
1581c2afad6cSKamil Konieczny err2 = s5p_hash_final(req);
1582c2afad6cSKamil Konieczny
1583c2afad6cSKamil Konieczny return err1 ?: err2;
1584c2afad6cSKamil Konieczny }
1585c2afad6cSKamil Konieczny
1586c2afad6cSKamil Konieczny /**
1587c2afad6cSKamil Konieczny * s5p_hash_init() - initialize AHASH request contex
1588c2afad6cSKamil Konieczny * @req: AHASH request
1589c2afad6cSKamil Konieczny *
1590c2afad6cSKamil Konieczny * Init async hash request context.
1591c2afad6cSKamil Konieczny */
s5p_hash_init(struct ahash_request * req)1592c2afad6cSKamil Konieczny static int s5p_hash_init(struct ahash_request *req)
1593c2afad6cSKamil Konieczny {
1594c2afad6cSKamil Konieczny struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
1595c2afad6cSKamil Konieczny struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
1596c2afad6cSKamil Konieczny struct s5p_hash_ctx *tctx = crypto_ahash_ctx(tfm);
1597c2afad6cSKamil Konieczny
1598c2afad6cSKamil Konieczny ctx->dd = tctx->dd;
1599c2afad6cSKamil Konieczny ctx->error = false;
1600c2afad6cSKamil Konieczny ctx->finup = false;
1601c2afad6cSKamil Konieczny ctx->bufcnt = 0;
1602c2afad6cSKamil Konieczny ctx->digcnt = 0;
1603c2afad6cSKamil Konieczny ctx->total = 0;
1604c2afad6cSKamil Konieczny ctx->skip = 0;
1605c2afad6cSKamil Konieczny
1606c2afad6cSKamil Konieczny dev_dbg(tctx->dd->dev, "init: digest size: %d\n",
1607c2afad6cSKamil Konieczny crypto_ahash_digestsize(tfm));
1608c2afad6cSKamil Konieczny
1609c2afad6cSKamil Konieczny switch (crypto_ahash_digestsize(tfm)) {
1610c2afad6cSKamil Konieczny case MD5_DIGEST_SIZE:
1611c2afad6cSKamil Konieczny ctx->engine = SSS_HASH_ENGINE_MD5;
1612c2afad6cSKamil Konieczny ctx->nregs = HASH_MD5_MAX_REG;
1613c2afad6cSKamil Konieczny break;
1614c2afad6cSKamil Konieczny case SHA1_DIGEST_SIZE:
1615c2afad6cSKamil Konieczny ctx->engine = SSS_HASH_ENGINE_SHA1;
1616c2afad6cSKamil Konieczny ctx->nregs = HASH_SHA1_MAX_REG;
1617c2afad6cSKamil Konieczny break;
1618c2afad6cSKamil Konieczny case SHA256_DIGEST_SIZE:
1619c2afad6cSKamil Konieczny ctx->engine = SSS_HASH_ENGINE_SHA256;
1620c2afad6cSKamil Konieczny ctx->nregs = HASH_SHA256_MAX_REG;
1621c2afad6cSKamil Konieczny break;
1622c2afad6cSKamil Konieczny default:
1623c2afad6cSKamil Konieczny ctx->error = true;
1624c2afad6cSKamil Konieczny return -EINVAL;
1625c2afad6cSKamil Konieczny }
1626c2afad6cSKamil Konieczny
1627c2afad6cSKamil Konieczny return 0;
1628c2afad6cSKamil Konieczny }
1629c2afad6cSKamil Konieczny
1630c2afad6cSKamil Konieczny /**
1631c2afad6cSKamil Konieczny * s5p_hash_digest - calculate digest from req->src
1632c2afad6cSKamil Konieczny * @req: AHASH request
1633c2afad6cSKamil Konieczny *
1634c2afad6cSKamil Konieczny * Return values: see s5p_hash_final above.
1635c2afad6cSKamil Konieczny */
s5p_hash_digest(struct ahash_request * req)1636c2afad6cSKamil Konieczny static int s5p_hash_digest(struct ahash_request *req)
1637c2afad6cSKamil Konieczny {
1638c2afad6cSKamil Konieczny return s5p_hash_init(req) ?: s5p_hash_finup(req);
1639c2afad6cSKamil Konieczny }
1640c2afad6cSKamil Konieczny
1641c2afad6cSKamil Konieczny /**
1642c2afad6cSKamil Konieczny * s5p_hash_cra_init_alg - init crypto alg transformation
1643c2afad6cSKamil Konieczny * @tfm: crypto transformation
1644c2afad6cSKamil Konieczny */
s5p_hash_cra_init_alg(struct crypto_tfm * tfm)1645c2afad6cSKamil Konieczny static int s5p_hash_cra_init_alg(struct crypto_tfm *tfm)
1646c2afad6cSKamil Konieczny {
1647c2afad6cSKamil Konieczny struct s5p_hash_ctx *tctx = crypto_tfm_ctx(tfm);
1648c2afad6cSKamil Konieczny const char *alg_name = crypto_tfm_alg_name(tfm);
1649c2afad6cSKamil Konieczny
1650c2afad6cSKamil Konieczny tctx->dd = s5p_dev;
1651c2afad6cSKamil Konieczny /* Allocate a fallback and abort if it failed. */
1652c2afad6cSKamil Konieczny tctx->fallback = crypto_alloc_shash(alg_name, 0,
1653c2afad6cSKamil Konieczny CRYPTO_ALG_NEED_FALLBACK);
1654c2afad6cSKamil Konieczny if (IS_ERR(tctx->fallback)) {
1655c2afad6cSKamil Konieczny pr_err("fallback alloc fails for '%s'\n", alg_name);
1656c2afad6cSKamil Konieczny return PTR_ERR(tctx->fallback);
1657c2afad6cSKamil Konieczny }
1658c2afad6cSKamil Konieczny
1659c2afad6cSKamil Konieczny crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm),
1660c2afad6cSKamil Konieczny sizeof(struct s5p_hash_reqctx) + BUFLEN);
1661c2afad6cSKamil Konieczny
1662c2afad6cSKamil Konieczny return 0;
1663c2afad6cSKamil Konieczny }
1664c2afad6cSKamil Konieczny
1665c2afad6cSKamil Konieczny /**
1666c2afad6cSKamil Konieczny * s5p_hash_cra_init - init crypto tfm
1667c2afad6cSKamil Konieczny * @tfm: crypto transformation
1668c2afad6cSKamil Konieczny */
s5p_hash_cra_init(struct crypto_tfm * tfm)1669c2afad6cSKamil Konieczny static int s5p_hash_cra_init(struct crypto_tfm *tfm)
1670c2afad6cSKamil Konieczny {
1671c2afad6cSKamil Konieczny return s5p_hash_cra_init_alg(tfm);
1672c2afad6cSKamil Konieczny }
1673c2afad6cSKamil Konieczny
1674c2afad6cSKamil Konieczny /**
1675c2afad6cSKamil Konieczny * s5p_hash_cra_exit - exit crypto tfm
1676c2afad6cSKamil Konieczny * @tfm: crypto transformation
1677c2afad6cSKamil Konieczny *
1678c2afad6cSKamil Konieczny * free allocated fallback
1679c2afad6cSKamil Konieczny */
s5p_hash_cra_exit(struct crypto_tfm * tfm)1680c2afad6cSKamil Konieczny static void s5p_hash_cra_exit(struct crypto_tfm *tfm)
1681c2afad6cSKamil Konieczny {
1682c2afad6cSKamil Konieczny struct s5p_hash_ctx *tctx = crypto_tfm_ctx(tfm);
1683c2afad6cSKamil Konieczny
1684c2afad6cSKamil Konieczny crypto_free_shash(tctx->fallback);
1685c2afad6cSKamil Konieczny tctx->fallback = NULL;
1686c2afad6cSKamil Konieczny }
1687c2afad6cSKamil Konieczny
1688c2afad6cSKamil Konieczny /**
1689c2afad6cSKamil Konieczny * s5p_hash_export - export hash state
1690c2afad6cSKamil Konieczny * @req: AHASH request
1691c2afad6cSKamil Konieczny * @out: buffer for exported state
1692c2afad6cSKamil Konieczny */
s5p_hash_export(struct ahash_request * req,void * out)1693c2afad6cSKamil Konieczny static int s5p_hash_export(struct ahash_request *req, void *out)
1694c2afad6cSKamil Konieczny {
16956584eacbSKrzysztof Kozlowski const struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
1696c2afad6cSKamil Konieczny
1697c2afad6cSKamil Konieczny memcpy(out, ctx, sizeof(*ctx) + ctx->bufcnt);
1698c2afad6cSKamil Konieczny
1699c2afad6cSKamil Konieczny return 0;
1700c2afad6cSKamil Konieczny }
1701c2afad6cSKamil Konieczny
1702c2afad6cSKamil Konieczny /**
1703c2afad6cSKamil Konieczny * s5p_hash_import - import hash state
1704c2afad6cSKamil Konieczny * @req: AHASH request
1705c2afad6cSKamil Konieczny * @in: buffer with state to be imported from
1706c2afad6cSKamil Konieczny */
s5p_hash_import(struct ahash_request * req,const void * in)1707c2afad6cSKamil Konieczny static int s5p_hash_import(struct ahash_request *req, const void *in)
1708c2afad6cSKamil Konieczny {
1709c2afad6cSKamil Konieczny struct s5p_hash_reqctx *ctx = ahash_request_ctx(req);
1710c2afad6cSKamil Konieczny struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
1711c2afad6cSKamil Konieczny struct s5p_hash_ctx *tctx = crypto_ahash_ctx(tfm);
1712c2afad6cSKamil Konieczny const struct s5p_hash_reqctx *ctx_in = in;
1713c2afad6cSKamil Konieczny
1714c2afad6cSKamil Konieczny memcpy(ctx, in, sizeof(*ctx) + BUFLEN);
1715c2afad6cSKamil Konieczny if (ctx_in->bufcnt > BUFLEN) {
1716c2afad6cSKamil Konieczny ctx->error = true;
1717c2afad6cSKamil Konieczny return -EINVAL;
1718c2afad6cSKamil Konieczny }
1719c2afad6cSKamil Konieczny
1720c2afad6cSKamil Konieczny ctx->dd = tctx->dd;
1721c2afad6cSKamil Konieczny ctx->error = false;
1722c2afad6cSKamil Konieczny
1723c2afad6cSKamil Konieczny return 0;
1724c2afad6cSKamil Konieczny }
1725c2afad6cSKamil Konieczny
1726c2afad6cSKamil Konieczny static struct ahash_alg algs_sha1_md5_sha256[] = {
1727c2afad6cSKamil Konieczny {
1728c2afad6cSKamil Konieczny .init = s5p_hash_init,
1729c2afad6cSKamil Konieczny .update = s5p_hash_update,
1730c2afad6cSKamil Konieczny .final = s5p_hash_final,
1731c2afad6cSKamil Konieczny .finup = s5p_hash_finup,
1732c2afad6cSKamil Konieczny .digest = s5p_hash_digest,
1733c2afad6cSKamil Konieczny .export = s5p_hash_export,
1734c2afad6cSKamil Konieczny .import = s5p_hash_import,
1735c2afad6cSKamil Konieczny .halg.statesize = sizeof(struct s5p_hash_reqctx) + BUFLEN,
1736c2afad6cSKamil Konieczny .halg.digestsize = SHA1_DIGEST_SIZE,
1737c2afad6cSKamil Konieczny .halg.base = {
1738c2afad6cSKamil Konieczny .cra_name = "sha1",
1739c2afad6cSKamil Konieczny .cra_driver_name = "exynos-sha1",
1740c2afad6cSKamil Konieczny .cra_priority = 100,
17416a38f622SEric Biggers .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
1742c2afad6cSKamil Konieczny CRYPTO_ALG_ASYNC |
1743c2afad6cSKamil Konieczny CRYPTO_ALG_NEED_FALLBACK,
1744c2afad6cSKamil Konieczny .cra_blocksize = HASH_BLOCK_SIZE,
1745c2afad6cSKamil Konieczny .cra_ctxsize = sizeof(struct s5p_hash_ctx),
1746c2afad6cSKamil Konieczny .cra_module = THIS_MODULE,
1747c2afad6cSKamil Konieczny .cra_init = s5p_hash_cra_init,
1748c2afad6cSKamil Konieczny .cra_exit = s5p_hash_cra_exit,
1749c2afad6cSKamil Konieczny }
1750c2afad6cSKamil Konieczny },
1751c2afad6cSKamil Konieczny {
1752c2afad6cSKamil Konieczny .init = s5p_hash_init,
1753c2afad6cSKamil Konieczny .update = s5p_hash_update,
1754c2afad6cSKamil Konieczny .final = s5p_hash_final,
1755c2afad6cSKamil Konieczny .finup = s5p_hash_finup,
1756c2afad6cSKamil Konieczny .digest = s5p_hash_digest,
1757c2afad6cSKamil Konieczny .export = s5p_hash_export,
1758c2afad6cSKamil Konieczny .import = s5p_hash_import,
1759c2afad6cSKamil Konieczny .halg.statesize = sizeof(struct s5p_hash_reqctx) + BUFLEN,
1760c2afad6cSKamil Konieczny .halg.digestsize = MD5_DIGEST_SIZE,
1761c2afad6cSKamil Konieczny .halg.base = {
1762c2afad6cSKamil Konieczny .cra_name = "md5",
1763c2afad6cSKamil Konieczny .cra_driver_name = "exynos-md5",
1764c2afad6cSKamil Konieczny .cra_priority = 100,
17656a38f622SEric Biggers .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
1766c2afad6cSKamil Konieczny CRYPTO_ALG_ASYNC |
1767c2afad6cSKamil Konieczny CRYPTO_ALG_NEED_FALLBACK,
1768c2afad6cSKamil Konieczny .cra_blocksize = HASH_BLOCK_SIZE,
1769c2afad6cSKamil Konieczny .cra_ctxsize = sizeof(struct s5p_hash_ctx),
1770c2afad6cSKamil Konieczny .cra_module = THIS_MODULE,
1771c2afad6cSKamil Konieczny .cra_init = s5p_hash_cra_init,
1772c2afad6cSKamil Konieczny .cra_exit = s5p_hash_cra_exit,
1773c2afad6cSKamil Konieczny }
1774c2afad6cSKamil Konieczny },
1775c2afad6cSKamil Konieczny {
1776c2afad6cSKamil Konieczny .init = s5p_hash_init,
1777c2afad6cSKamil Konieczny .update = s5p_hash_update,
1778c2afad6cSKamil Konieczny .final = s5p_hash_final,
1779c2afad6cSKamil Konieczny .finup = s5p_hash_finup,
1780c2afad6cSKamil Konieczny .digest = s5p_hash_digest,
1781c2afad6cSKamil Konieczny .export = s5p_hash_export,
1782c2afad6cSKamil Konieczny .import = s5p_hash_import,
1783c2afad6cSKamil Konieczny .halg.statesize = sizeof(struct s5p_hash_reqctx) + BUFLEN,
1784c2afad6cSKamil Konieczny .halg.digestsize = SHA256_DIGEST_SIZE,
1785c2afad6cSKamil Konieczny .halg.base = {
1786c2afad6cSKamil Konieczny .cra_name = "sha256",
1787c2afad6cSKamil Konieczny .cra_driver_name = "exynos-sha256",
1788c2afad6cSKamil Konieczny .cra_priority = 100,
17896a38f622SEric Biggers .cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
1790c2afad6cSKamil Konieczny CRYPTO_ALG_ASYNC |
1791c2afad6cSKamil Konieczny CRYPTO_ALG_NEED_FALLBACK,
1792c2afad6cSKamil Konieczny .cra_blocksize = HASH_BLOCK_SIZE,
1793c2afad6cSKamil Konieczny .cra_ctxsize = sizeof(struct s5p_hash_ctx),
1794c2afad6cSKamil Konieczny .cra_module = THIS_MODULE,
1795c2afad6cSKamil Konieczny .cra_init = s5p_hash_cra_init,
1796c2afad6cSKamil Konieczny .cra_exit = s5p_hash_cra_exit,
1797c2afad6cSKamil Konieczny }
1798c2afad6cSKamil Konieczny }
1799c2afad6cSKamil Konieczny
1800c2afad6cSKamil Konieczny };
1801c2afad6cSKamil Konieczny
s5p_set_aes(struct s5p_aes_dev * dev,const u8 * key,const u8 * iv,const u8 * ctr,unsigned int keylen)1802a49e490cSVladimir Zapolskiy static void s5p_set_aes(struct s5p_aes_dev *dev,
1803cdf640a6SChristoph Manszewski const u8 *key, const u8 *iv, const u8 *ctr,
18046584eacbSKrzysztof Kozlowski unsigned int keylen)
1805a49e490cSVladimir Zapolskiy {
1806a49e490cSVladimir Zapolskiy void __iomem *keystart;
1807a49e490cSVladimir Zapolskiy
18088f9702aaSNaveen Krishna Chatradhi if (iv)
1809ef5c73b3SKrzysztof Kozlowski memcpy_toio(dev->aes_ioaddr + SSS_REG_AES_IV_DATA(0), iv,
1810ef5c73b3SKrzysztof Kozlowski AES_BLOCK_SIZE);
1811a49e490cSVladimir Zapolskiy
1812cdf640a6SChristoph Manszewski if (ctr)
1813ef5c73b3SKrzysztof Kozlowski memcpy_toio(dev->aes_ioaddr + SSS_REG_AES_CNT_DATA(0), ctr,
1814ef5c73b3SKrzysztof Kozlowski AES_BLOCK_SIZE);
1815cdf640a6SChristoph Manszewski
1816a49e490cSVladimir Zapolskiy if (keylen == AES_KEYSIZE_256)
181789245107SNaveen Krishna Chatradhi keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(0);
1818a49e490cSVladimir Zapolskiy else if (keylen == AES_KEYSIZE_192)
181989245107SNaveen Krishna Chatradhi keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(2);
1820a49e490cSVladimir Zapolskiy else
182189245107SNaveen Krishna Chatradhi keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(4);
1822a49e490cSVladimir Zapolskiy
18231e3012d0SKrzysztof Koz?owski memcpy_toio(keystart, key, keylen);
1824a49e490cSVladimir Zapolskiy }
1825a49e490cSVladimir Zapolskiy
s5p_is_sg_aligned(struct scatterlist * sg)18269e4a1100SKrzysztof Kozlowski static bool s5p_is_sg_aligned(struct scatterlist *sg)
18279e4a1100SKrzysztof Kozlowski {
18289e4a1100SKrzysztof Kozlowski while (sg) {
1829d1497977SMarek Szyprowski if (!IS_ALIGNED(sg->length, AES_BLOCK_SIZE))
18309e4a1100SKrzysztof Kozlowski return false;
18319e4a1100SKrzysztof Kozlowski sg = sg_next(sg);
18329e4a1100SKrzysztof Kozlowski }
18339e4a1100SKrzysztof Kozlowski
18349e4a1100SKrzysztof Kozlowski return true;
18359e4a1100SKrzysztof Kozlowski }
18369e4a1100SKrzysztof Kozlowski
s5p_set_indata_start(struct s5p_aes_dev * dev,struct skcipher_request * req)18379e4a1100SKrzysztof Kozlowski static int s5p_set_indata_start(struct s5p_aes_dev *dev,
1838e6b98ce6SArd Biesheuvel struct skcipher_request *req)
18399e4a1100SKrzysztof Kozlowski {
18409e4a1100SKrzysztof Kozlowski struct scatterlist *sg;
18419e4a1100SKrzysztof Kozlowski int err;
18429e4a1100SKrzysztof Kozlowski
18439e4a1100SKrzysztof Kozlowski dev->sg_src_cpy = NULL;
18449e4a1100SKrzysztof Kozlowski sg = req->src;
18459e4a1100SKrzysztof Kozlowski if (!s5p_is_sg_aligned(sg)) {
18469e4a1100SKrzysztof Kozlowski dev_dbg(dev->dev,
18479e4a1100SKrzysztof Kozlowski "At least one unaligned source scatter list, making a copy\n");
18489e4a1100SKrzysztof Kozlowski err = s5p_make_sg_cpy(dev, sg, &dev->sg_src_cpy);
18499e4a1100SKrzysztof Kozlowski if (err)
18509e4a1100SKrzysztof Kozlowski return err;
18519e4a1100SKrzysztof Kozlowski
18529e4a1100SKrzysztof Kozlowski sg = dev->sg_src_cpy;
18539e4a1100SKrzysztof Kozlowski }
18549e4a1100SKrzysztof Kozlowski
18559e4a1100SKrzysztof Kozlowski err = s5p_set_indata(dev, sg);
18569e4a1100SKrzysztof Kozlowski if (err) {
18579e4a1100SKrzysztof Kozlowski s5p_free_sg_cpy(dev, &dev->sg_src_cpy);
18589e4a1100SKrzysztof Kozlowski return err;
18599e4a1100SKrzysztof Kozlowski }
18609e4a1100SKrzysztof Kozlowski
18619e4a1100SKrzysztof Kozlowski return 0;
18629e4a1100SKrzysztof Kozlowski }
18639e4a1100SKrzysztof Kozlowski
s5p_set_outdata_start(struct s5p_aes_dev * dev,struct skcipher_request * req)18649e4a1100SKrzysztof Kozlowski static int s5p_set_outdata_start(struct s5p_aes_dev *dev,
1865e6b98ce6SArd Biesheuvel struct skcipher_request *req)
18669e4a1100SKrzysztof Kozlowski {
18679e4a1100SKrzysztof Kozlowski struct scatterlist *sg;
18689e4a1100SKrzysztof Kozlowski int err;
18699e4a1100SKrzysztof Kozlowski
18709e4a1100SKrzysztof Kozlowski dev->sg_dst_cpy = NULL;
18719e4a1100SKrzysztof Kozlowski sg = req->dst;
18729e4a1100SKrzysztof Kozlowski if (!s5p_is_sg_aligned(sg)) {
18739e4a1100SKrzysztof Kozlowski dev_dbg(dev->dev,
18749e4a1100SKrzysztof Kozlowski "At least one unaligned dest scatter list, making a copy\n");
18759e4a1100SKrzysztof Kozlowski err = s5p_make_sg_cpy(dev, sg, &dev->sg_dst_cpy);
18769e4a1100SKrzysztof Kozlowski if (err)
18779e4a1100SKrzysztof Kozlowski return err;
18789e4a1100SKrzysztof Kozlowski
18799e4a1100SKrzysztof Kozlowski sg = dev->sg_dst_cpy;
18809e4a1100SKrzysztof Kozlowski }
18819e4a1100SKrzysztof Kozlowski
18829e4a1100SKrzysztof Kozlowski err = s5p_set_outdata(dev, sg);
18839e4a1100SKrzysztof Kozlowski if (err) {
18849e4a1100SKrzysztof Kozlowski s5p_free_sg_cpy(dev, &dev->sg_dst_cpy);
18859e4a1100SKrzysztof Kozlowski return err;
18869e4a1100SKrzysztof Kozlowski }
18879e4a1100SKrzysztof Kozlowski
18889e4a1100SKrzysztof Kozlowski return 0;
18899e4a1100SKrzysztof Kozlowski }
18909e4a1100SKrzysztof Kozlowski
s5p_aes_crypt_start(struct s5p_aes_dev * dev,unsigned long mode)1891a49e490cSVladimir Zapolskiy static void s5p_aes_crypt_start(struct s5p_aes_dev *dev, unsigned long mode)
1892a49e490cSVladimir Zapolskiy {
1893e6b98ce6SArd Biesheuvel struct skcipher_request *req = dev->req;
1894b1b4416fSChristoph Manszewski u32 aes_control;
1895a49e490cSVladimir Zapolskiy unsigned long flags;
18965318c53dSKrzysztof Kozlowski int err;
1897cdf640a6SChristoph Manszewski u8 *iv, *ctr;
1898a49e490cSVladimir Zapolskiy
1899cdf640a6SChristoph Manszewski /* This sets bit [13:12] to 00, which selects 128-bit counter */
1900a49e490cSVladimir Zapolskiy aes_control = SSS_AES_KEY_CHANGE_MODE;
1901a49e490cSVladimir Zapolskiy if (mode & FLAGS_AES_DECRYPT)
1902a49e490cSVladimir Zapolskiy aes_control |= SSS_AES_MODE_DECRYPT;
1903a49e490cSVladimir Zapolskiy
1904c927b080SKamil Konieczny if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CBC) {
1905a49e490cSVladimir Zapolskiy aes_control |= SSS_AES_CHAIN_MODE_CBC;
1906e6b98ce6SArd Biesheuvel iv = req->iv;
1907cdf640a6SChristoph Manszewski ctr = NULL;
1908c927b080SKamil Konieczny } else if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CTR) {
1909a49e490cSVladimir Zapolskiy aes_control |= SSS_AES_CHAIN_MODE_CTR;
1910cdf640a6SChristoph Manszewski iv = NULL;
1911e6b98ce6SArd Biesheuvel ctr = req->iv;
1912c927b080SKamil Konieczny } else {
1913c927b080SKamil Konieczny iv = NULL; /* AES_ECB */
1914cdf640a6SChristoph Manszewski ctr = NULL;
1915c927b080SKamil Konieczny }
1916a49e490cSVladimir Zapolskiy
1917a49e490cSVladimir Zapolskiy if (dev->ctx->keylen == AES_KEYSIZE_192)
1918a49e490cSVladimir Zapolskiy aes_control |= SSS_AES_KEY_SIZE_192;
1919a49e490cSVladimir Zapolskiy else if (dev->ctx->keylen == AES_KEYSIZE_256)
1920a49e490cSVladimir Zapolskiy aes_control |= SSS_AES_KEY_SIZE_256;
1921a49e490cSVladimir Zapolskiy
1922a49e490cSVladimir Zapolskiy aes_control |= SSS_AES_FIFO_MODE;
1923a49e490cSVladimir Zapolskiy
1924a49e490cSVladimir Zapolskiy /* as a variant it is possible to use byte swapping on DMA side */
1925a49e490cSVladimir Zapolskiy aes_control |= SSS_AES_BYTESWAP_DI
1926a49e490cSVladimir Zapolskiy | SSS_AES_BYTESWAP_DO
1927a49e490cSVladimir Zapolskiy | SSS_AES_BYTESWAP_IV
1928a49e490cSVladimir Zapolskiy | SSS_AES_BYTESWAP_KEY
1929a49e490cSVladimir Zapolskiy | SSS_AES_BYTESWAP_CNT;
1930a49e490cSVladimir Zapolskiy
1931a49e490cSVladimir Zapolskiy spin_lock_irqsave(&dev->lock, flags);
1932a49e490cSVladimir Zapolskiy
1933a49e490cSVladimir Zapolskiy SSS_WRITE(dev, FCINTENCLR,
1934a49e490cSVladimir Zapolskiy SSS_FCINTENCLR_BTDMAINTENCLR | SSS_FCINTENCLR_BRDMAINTENCLR);
1935a49e490cSVladimir Zapolskiy SSS_WRITE(dev, FCFIFOCTRL, 0x00);
1936a49e490cSVladimir Zapolskiy
19379e4a1100SKrzysztof Kozlowski err = s5p_set_indata_start(dev, req);
1938a49e490cSVladimir Zapolskiy if (err)
1939a49e490cSVladimir Zapolskiy goto indata_error;
1940a49e490cSVladimir Zapolskiy
19419e4a1100SKrzysztof Kozlowski err = s5p_set_outdata_start(dev, req);
1942a49e490cSVladimir Zapolskiy if (err)
1943a49e490cSVladimir Zapolskiy goto outdata_error;
1944a49e490cSVladimir Zapolskiy
194589245107SNaveen Krishna Chatradhi SSS_AES_WRITE(dev, AES_CONTROL, aes_control);
1946cdf640a6SChristoph Manszewski s5p_set_aes(dev, dev->ctx->aes_key, iv, ctr, dev->ctx->keylen);
1947a49e490cSVladimir Zapolskiy
19489e4a1100SKrzysztof Kozlowski s5p_set_dma_indata(dev, dev->sg_src);
19499e4a1100SKrzysztof Kozlowski s5p_set_dma_outdata(dev, dev->sg_dst);
1950a49e490cSVladimir Zapolskiy
1951a49e490cSVladimir Zapolskiy SSS_WRITE(dev, FCINTENSET,
1952a49e490cSVladimir Zapolskiy SSS_FCINTENSET_BTDMAINTENSET | SSS_FCINTENSET_BRDMAINTENSET);
1953a49e490cSVladimir Zapolskiy
1954a49e490cSVladimir Zapolskiy spin_unlock_irqrestore(&dev->lock, flags);
1955a49e490cSVladimir Zapolskiy
1956a49e490cSVladimir Zapolskiy return;
1957a49e490cSVladimir Zapolskiy
1958a49e490cSVladimir Zapolskiy outdata_error:
1959a49e490cSVladimir Zapolskiy s5p_unset_indata(dev);
1960a49e490cSVladimir Zapolskiy
1961a49e490cSVladimir Zapolskiy indata_error:
196228b62b14SKrzysztof Kozlowski s5p_sg_done(dev);
196342d5c176SKrzysztof Kozlowski dev->busy = false;
1964a49e490cSVladimir Zapolskiy spin_unlock_irqrestore(&dev->lock, flags);
19655842cd44SChristoph Manszewski s5p_aes_complete(req, err);
1966a49e490cSVladimir Zapolskiy }
1967a49e490cSVladimir Zapolskiy
s5p_tasklet_cb(unsigned long data)1968a49e490cSVladimir Zapolskiy static void s5p_tasklet_cb(unsigned long data)
1969a49e490cSVladimir Zapolskiy {
1970a49e490cSVladimir Zapolskiy struct s5p_aes_dev *dev = (struct s5p_aes_dev *)data;
1971a49e490cSVladimir Zapolskiy struct crypto_async_request *async_req, *backlog;
1972a49e490cSVladimir Zapolskiy struct s5p_aes_reqctx *reqctx;
1973a49e490cSVladimir Zapolskiy unsigned long flags;
1974a49e490cSVladimir Zapolskiy
1975a49e490cSVladimir Zapolskiy spin_lock_irqsave(&dev->lock, flags);
1976a49e490cSVladimir Zapolskiy backlog = crypto_get_backlog(&dev->queue);
1977a49e490cSVladimir Zapolskiy async_req = crypto_dequeue_request(&dev->queue);
1978a49e490cSVladimir Zapolskiy
1979dc5e3f19SNaveen Krishna Chatradhi if (!async_req) {
1980dc5e3f19SNaveen Krishna Chatradhi dev->busy = false;
1981dc5e3f19SNaveen Krishna Chatradhi spin_unlock_irqrestore(&dev->lock, flags);
1982a49e490cSVladimir Zapolskiy return;
1983dc5e3f19SNaveen Krishna Chatradhi }
1984dc5e3f19SNaveen Krishna Chatradhi spin_unlock_irqrestore(&dev->lock, flags);
1985a49e490cSVladimir Zapolskiy
1986a49e490cSVladimir Zapolskiy if (backlog)
1987e94c1c9bSHerbert Xu crypto_request_complete(backlog, -EINPROGRESS);
1988a49e490cSVladimir Zapolskiy
1989e6b98ce6SArd Biesheuvel dev->req = skcipher_request_cast(async_req);
1990a49e490cSVladimir Zapolskiy dev->ctx = crypto_tfm_ctx(dev->req->base.tfm);
1991e6b98ce6SArd Biesheuvel reqctx = skcipher_request_ctx(dev->req);
1992a49e490cSVladimir Zapolskiy
1993a49e490cSVladimir Zapolskiy s5p_aes_crypt_start(dev, reqctx->mode);
1994a49e490cSVladimir Zapolskiy }
1995a49e490cSVladimir Zapolskiy
s5p_aes_handle_req(struct s5p_aes_dev * dev,struct skcipher_request * req)1996a49e490cSVladimir Zapolskiy static int s5p_aes_handle_req(struct s5p_aes_dev *dev,
1997e6b98ce6SArd Biesheuvel struct skcipher_request *req)
1998a49e490cSVladimir Zapolskiy {
1999a49e490cSVladimir Zapolskiy unsigned long flags;
2000a49e490cSVladimir Zapolskiy int err;
2001a49e490cSVladimir Zapolskiy
2002a49e490cSVladimir Zapolskiy spin_lock_irqsave(&dev->lock, flags);
2003e6b98ce6SArd Biesheuvel err = crypto_enqueue_request(&dev->queue, &req->base);
2004a49e490cSVladimir Zapolskiy if (dev->busy) {
2005a49e490cSVladimir Zapolskiy spin_unlock_irqrestore(&dev->lock, flags);
2006b1b4416fSChristoph Manszewski return err;
2007a49e490cSVladimir Zapolskiy }
2008a49e490cSVladimir Zapolskiy dev->busy = true;
2009a49e490cSVladimir Zapolskiy
2010a49e490cSVladimir Zapolskiy spin_unlock_irqrestore(&dev->lock, flags);
2011a49e490cSVladimir Zapolskiy
2012a49e490cSVladimir Zapolskiy tasklet_schedule(&dev->tasklet);
2013a49e490cSVladimir Zapolskiy
2014a49e490cSVladimir Zapolskiy return err;
2015a49e490cSVladimir Zapolskiy }
2016a49e490cSVladimir Zapolskiy
s5p_aes_crypt(struct skcipher_request * req,unsigned long mode)2017e6b98ce6SArd Biesheuvel static int s5p_aes_crypt(struct skcipher_request *req, unsigned long mode)
2018a49e490cSVladimir Zapolskiy {
2019e6b98ce6SArd Biesheuvel struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
2020e6b98ce6SArd Biesheuvel struct s5p_aes_reqctx *reqctx = skcipher_request_ctx(req);
2021e6b98ce6SArd Biesheuvel struct s5p_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
2022a49e490cSVladimir Zapolskiy struct s5p_aes_dev *dev = ctx->dev;
2023a49e490cSVladimir Zapolskiy
2024e6b98ce6SArd Biesheuvel if (!req->cryptlen)
202584a0b00aSArd Biesheuvel return 0;
202684a0b00aSArd Biesheuvel
2027e6b98ce6SArd Biesheuvel if (!IS_ALIGNED(req->cryptlen, AES_BLOCK_SIZE) &&
2028cdf640a6SChristoph Manszewski ((mode & FLAGS_AES_MODE_MASK) != FLAGS_AES_CTR)) {
202984a0b00aSArd Biesheuvel dev_dbg(dev->dev, "request size is not exact amount of AES blocks\n");
2030a49e490cSVladimir Zapolskiy return -EINVAL;
2031a49e490cSVladimir Zapolskiy }
2032a49e490cSVladimir Zapolskiy
2033a49e490cSVladimir Zapolskiy reqctx->mode = mode;
2034a49e490cSVladimir Zapolskiy
2035a49e490cSVladimir Zapolskiy return s5p_aes_handle_req(dev, req);
2036a49e490cSVladimir Zapolskiy }
2037a49e490cSVladimir Zapolskiy
s5p_aes_setkey(struct crypto_skcipher * cipher,const u8 * key,unsigned int keylen)2038e6b98ce6SArd Biesheuvel static int s5p_aes_setkey(struct crypto_skcipher *cipher,
2039b1b4416fSChristoph Manszewski const u8 *key, unsigned int keylen)
2040a49e490cSVladimir Zapolskiy {
2041e6b98ce6SArd Biesheuvel struct crypto_tfm *tfm = crypto_skcipher_tfm(cipher);
2042a49e490cSVladimir Zapolskiy struct s5p_aes_ctx *ctx = crypto_tfm_ctx(tfm);
2043a49e490cSVladimir Zapolskiy
2044a49e490cSVladimir Zapolskiy if (keylen != AES_KEYSIZE_128 &&
2045a49e490cSVladimir Zapolskiy keylen != AES_KEYSIZE_192 &&
2046a49e490cSVladimir Zapolskiy keylen != AES_KEYSIZE_256)
2047a49e490cSVladimir Zapolskiy return -EINVAL;
2048a49e490cSVladimir Zapolskiy
2049a49e490cSVladimir Zapolskiy memcpy(ctx->aes_key, key, keylen);
2050a49e490cSVladimir Zapolskiy ctx->keylen = keylen;
2051a49e490cSVladimir Zapolskiy
2052a49e490cSVladimir Zapolskiy return 0;
2053a49e490cSVladimir Zapolskiy }
2054a49e490cSVladimir Zapolskiy
s5p_aes_ecb_encrypt(struct skcipher_request * req)2055e6b98ce6SArd Biesheuvel static int s5p_aes_ecb_encrypt(struct skcipher_request *req)
2056a49e490cSVladimir Zapolskiy {
2057a49e490cSVladimir Zapolskiy return s5p_aes_crypt(req, 0);
2058a49e490cSVladimir Zapolskiy }
2059a49e490cSVladimir Zapolskiy
s5p_aes_ecb_decrypt(struct skcipher_request * req)2060e6b98ce6SArd Biesheuvel static int s5p_aes_ecb_decrypt(struct skcipher_request *req)
2061a49e490cSVladimir Zapolskiy {
2062a49e490cSVladimir Zapolskiy return s5p_aes_crypt(req, FLAGS_AES_DECRYPT);
2063a49e490cSVladimir Zapolskiy }
2064a49e490cSVladimir Zapolskiy
s5p_aes_cbc_encrypt(struct skcipher_request * req)2065e6b98ce6SArd Biesheuvel static int s5p_aes_cbc_encrypt(struct skcipher_request *req)
2066a49e490cSVladimir Zapolskiy {
2067a49e490cSVladimir Zapolskiy return s5p_aes_crypt(req, FLAGS_AES_CBC);
2068a49e490cSVladimir Zapolskiy }
2069a49e490cSVladimir Zapolskiy
s5p_aes_cbc_decrypt(struct skcipher_request * req)2070e6b98ce6SArd Biesheuvel static int s5p_aes_cbc_decrypt(struct skcipher_request *req)
2071a49e490cSVladimir Zapolskiy {
2072a49e490cSVladimir Zapolskiy return s5p_aes_crypt(req, FLAGS_AES_DECRYPT | FLAGS_AES_CBC);
2073a49e490cSVladimir Zapolskiy }
2074a49e490cSVladimir Zapolskiy
s5p_aes_ctr_crypt(struct skcipher_request * req)2075e6b98ce6SArd Biesheuvel static int s5p_aes_ctr_crypt(struct skcipher_request *req)
2076cdf640a6SChristoph Manszewski {
2077cdf640a6SChristoph Manszewski return s5p_aes_crypt(req, FLAGS_AES_CTR);
2078cdf640a6SChristoph Manszewski }
2079cdf640a6SChristoph Manszewski
s5p_aes_init_tfm(struct crypto_skcipher * tfm)2080e6b98ce6SArd Biesheuvel static int s5p_aes_init_tfm(struct crypto_skcipher *tfm)
2081a49e490cSVladimir Zapolskiy {
2082e6b98ce6SArd Biesheuvel struct s5p_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
2083a49e490cSVladimir Zapolskiy
2084a49e490cSVladimir Zapolskiy ctx->dev = s5p_dev;
2085e6b98ce6SArd Biesheuvel crypto_skcipher_set_reqsize(tfm, sizeof(struct s5p_aes_reqctx));
2086a49e490cSVladimir Zapolskiy
2087a49e490cSVladimir Zapolskiy return 0;
2088a49e490cSVladimir Zapolskiy }
2089a49e490cSVladimir Zapolskiy
2090e6b98ce6SArd Biesheuvel static struct skcipher_alg algs[] = {
2091a49e490cSVladimir Zapolskiy {
2092e6b98ce6SArd Biesheuvel .base.cra_name = "ecb(aes)",
2093e6b98ce6SArd Biesheuvel .base.cra_driver_name = "ecb-aes-s5p",
2094e6b98ce6SArd Biesheuvel .base.cra_priority = 100,
2095e6b98ce6SArd Biesheuvel .base.cra_flags = CRYPTO_ALG_ASYNC |
2096d912bb76SNikos Mavrogiannopoulos CRYPTO_ALG_KERN_DRIVER_ONLY,
2097e6b98ce6SArd Biesheuvel .base.cra_blocksize = AES_BLOCK_SIZE,
2098e6b98ce6SArd Biesheuvel .base.cra_ctxsize = sizeof(struct s5p_aes_ctx),
2099e6b98ce6SArd Biesheuvel .base.cra_alignmask = 0x0f,
2100e6b98ce6SArd Biesheuvel .base.cra_module = THIS_MODULE,
2101e6b98ce6SArd Biesheuvel
2102a49e490cSVladimir Zapolskiy .min_keysize = AES_MIN_KEY_SIZE,
2103a49e490cSVladimir Zapolskiy .max_keysize = AES_MAX_KEY_SIZE,
2104a49e490cSVladimir Zapolskiy .setkey = s5p_aes_setkey,
2105a49e490cSVladimir Zapolskiy .encrypt = s5p_aes_ecb_encrypt,
2106a49e490cSVladimir Zapolskiy .decrypt = s5p_aes_ecb_decrypt,
2107e6b98ce6SArd Biesheuvel .init = s5p_aes_init_tfm,
2108a49e490cSVladimir Zapolskiy },
2109a49e490cSVladimir Zapolskiy {
2110e6b98ce6SArd Biesheuvel .base.cra_name = "cbc(aes)",
2111e6b98ce6SArd Biesheuvel .base.cra_driver_name = "cbc-aes-s5p",
2112e6b98ce6SArd Biesheuvel .base.cra_priority = 100,
2113e6b98ce6SArd Biesheuvel .base.cra_flags = CRYPTO_ALG_ASYNC |
2114d912bb76SNikos Mavrogiannopoulos CRYPTO_ALG_KERN_DRIVER_ONLY,
2115e6b98ce6SArd Biesheuvel .base.cra_blocksize = AES_BLOCK_SIZE,
2116e6b98ce6SArd Biesheuvel .base.cra_ctxsize = sizeof(struct s5p_aes_ctx),
2117e6b98ce6SArd Biesheuvel .base.cra_alignmask = 0x0f,
2118e6b98ce6SArd Biesheuvel .base.cra_module = THIS_MODULE,
2119e6b98ce6SArd Biesheuvel
2120a49e490cSVladimir Zapolskiy .min_keysize = AES_MIN_KEY_SIZE,
2121a49e490cSVladimir Zapolskiy .max_keysize = AES_MAX_KEY_SIZE,
2122a49e490cSVladimir Zapolskiy .ivsize = AES_BLOCK_SIZE,
2123a49e490cSVladimir Zapolskiy .setkey = s5p_aes_setkey,
2124a49e490cSVladimir Zapolskiy .encrypt = s5p_aes_cbc_encrypt,
2125a49e490cSVladimir Zapolskiy .decrypt = s5p_aes_cbc_decrypt,
2126e6b98ce6SArd Biesheuvel .init = s5p_aes_init_tfm,
2127a49e490cSVladimir Zapolskiy },
2128cdf640a6SChristoph Manszewski {
2129e6b98ce6SArd Biesheuvel .base.cra_name = "ctr(aes)",
2130e6b98ce6SArd Biesheuvel .base.cra_driver_name = "ctr-aes-s5p",
2131e6b98ce6SArd Biesheuvel .base.cra_priority = 100,
2132e6b98ce6SArd Biesheuvel .base.cra_flags = CRYPTO_ALG_ASYNC |
2133cdf640a6SChristoph Manszewski CRYPTO_ALG_KERN_DRIVER_ONLY,
2134e6b98ce6SArd Biesheuvel .base.cra_blocksize = 1,
2135e6b98ce6SArd Biesheuvel .base.cra_ctxsize = sizeof(struct s5p_aes_ctx),
2136e6b98ce6SArd Biesheuvel .base.cra_alignmask = 0x0f,
2137e6b98ce6SArd Biesheuvel .base.cra_module = THIS_MODULE,
2138e6b98ce6SArd Biesheuvel
2139cdf640a6SChristoph Manszewski .min_keysize = AES_MIN_KEY_SIZE,
2140cdf640a6SChristoph Manszewski .max_keysize = AES_MAX_KEY_SIZE,
2141cdf640a6SChristoph Manszewski .ivsize = AES_BLOCK_SIZE,
2142cdf640a6SChristoph Manszewski .setkey = s5p_aes_setkey,
2143cdf640a6SChristoph Manszewski .encrypt = s5p_aes_ctr_crypt,
2144cdf640a6SChristoph Manszewski .decrypt = s5p_aes_ctr_crypt,
2145e6b98ce6SArd Biesheuvel .init = s5p_aes_init_tfm,
2146cdf640a6SChristoph Manszewski },
2147a49e490cSVladimir Zapolskiy };
2148a49e490cSVladimir Zapolskiy
s5p_aes_probe(struct platform_device * pdev)2149a49e490cSVladimir Zapolskiy static int s5p_aes_probe(struct platform_device *pdev)
2150a49e490cSVladimir Zapolskiy {
2151a49e490cSVladimir Zapolskiy struct device *dev = &pdev->dev;
21523d3b3a00SKrzysztof Kozlowski int i, j, err;
21536584eacbSKrzysztof Kozlowski const struct samsung_aes_variant *variant;
21545318c53dSKrzysztof Kozlowski struct s5p_aes_dev *pdata;
21555318c53dSKrzysztof Kozlowski struct resource *res;
2156c2afad6cSKamil Konieczny unsigned int hash_i;
2157a49e490cSVladimir Zapolskiy
2158a49e490cSVladimir Zapolskiy if (s5p_dev)
2159a49e490cSVladimir Zapolskiy return -EEXIST;
2160a49e490cSVladimir Zapolskiy
2161a49e490cSVladimir Zapolskiy pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
2162a49e490cSVladimir Zapolskiy if (!pdata)
2163a49e490cSVladimir Zapolskiy return -ENOMEM;
2164a49e490cSVladimir Zapolskiy
2165c2afad6cSKamil Konieczny variant = find_s5p_sss_version(pdev);
21660fdefe2cSJingoo Han res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2167a472cc0dSTang Bin if (!res)
2168a472cc0dSTang Bin return -EINVAL;
2169c2afad6cSKamil Konieczny
2170c2afad6cSKamil Konieczny /*
2171c2afad6cSKamil Konieczny * Note: HASH and PRNG uses the same registers in secss, avoid
2172c2afad6cSKamil Konieczny * overwrite each other. This will drop HASH when CONFIG_EXYNOS_RNG
2173c2afad6cSKamil Konieczny * is enabled in config. We need larger size for HASH registers in
2174c2afad6cSKamil Konieczny * secss, current describe only AES/DES
2175c2afad6cSKamil Konieczny */
2176c2afad6cSKamil Konieczny if (IS_ENABLED(CONFIG_CRYPTO_DEV_EXYNOS_HASH)) {
2177c2afad6cSKamil Konieczny if (variant == &exynos_aes_data) {
2178c2afad6cSKamil Konieczny res->end += 0x300;
2179c2afad6cSKamil Konieczny pdata->use_hash = true;
2180c2afad6cSKamil Konieczny }
2181c2afad6cSKamil Konieczny }
2182c2afad6cSKamil Konieczny
2183c2afad6cSKamil Konieczny pdata->res = res;
218487bff3d8SKrzysztof Kozlowski pdata->ioaddr = devm_ioremap_resource(dev, res);
2185c2afad6cSKamil Konieczny if (IS_ERR(pdata->ioaddr)) {
2186c2afad6cSKamil Konieczny if (!pdata->use_hash)
2187c2afad6cSKamil Konieczny return PTR_ERR(pdata->ioaddr);
2188c2afad6cSKamil Konieczny /* try AES without HASH */
2189c2afad6cSKamil Konieczny res->end -= 0x300;
2190c2afad6cSKamil Konieczny pdata->use_hash = false;
219187bff3d8SKrzysztof Kozlowski pdata->ioaddr = devm_ioremap_resource(dev, res);
21920fdefe2cSJingoo Han if (IS_ERR(pdata->ioaddr))
21930fdefe2cSJingoo Han return PTR_ERR(pdata->ioaddr);
2194c2afad6cSKamil Konieczny }
219589245107SNaveen Krishna Chatradhi
21960918f18cSKamil Konieczny pdata->clk = devm_clk_get(dev, variant->clk_names[0]);
2197b7da560eSKrzysztof Kozlowski if (IS_ERR(pdata->clk))
2198b7da560eSKrzysztof Kozlowski return dev_err_probe(dev, PTR_ERR(pdata->clk),
2199b7da560eSKrzysztof Kozlowski "failed to find secss clock %s\n",
22000918f18cSKamil Konieczny variant->clk_names[0]);
2201a49e490cSVladimir Zapolskiy
2202c1eb7ef2SNaveen Krishna Chatradhi err = clk_prepare_enable(pdata->clk);
2203c1eb7ef2SNaveen Krishna Chatradhi if (err < 0) {
22040918f18cSKamil Konieczny dev_err(dev, "Enabling clock %s failed, err %d\n",
22050918f18cSKamil Konieczny variant->clk_names[0], err);
2206c1eb7ef2SNaveen Krishna Chatradhi return err;
2207c1eb7ef2SNaveen Krishna Chatradhi }
2208a49e490cSVladimir Zapolskiy
22090918f18cSKamil Konieczny if (variant->clk_names[1]) {
22100918f18cSKamil Konieczny pdata->pclk = devm_clk_get(dev, variant->clk_names[1]);
22110918f18cSKamil Konieczny if (IS_ERR(pdata->pclk)) {
2212b7da560eSKrzysztof Kozlowski err = dev_err_probe(dev, PTR_ERR(pdata->pclk),
2213b7da560eSKrzysztof Kozlowski "failed to find clock %s\n",
22140918f18cSKamil Konieczny variant->clk_names[1]);
22150918f18cSKamil Konieczny goto err_clk;
22160918f18cSKamil Konieczny }
22170918f18cSKamil Konieczny
22180918f18cSKamil Konieczny err = clk_prepare_enable(pdata->pclk);
22190918f18cSKamil Konieczny if (err < 0) {
22200918f18cSKamil Konieczny dev_err(dev, "Enabling clock %s failed, err %d\n",
22210918f18cSKamil Konieczny variant->clk_names[0], err);
22220918f18cSKamil Konieczny goto err_clk;
22230918f18cSKamil Konieczny }
22240918f18cSKamil Konieczny } else {
22250918f18cSKamil Konieczny pdata->pclk = NULL;
22260918f18cSKamil Konieczny }
22270918f18cSKamil Konieczny
2228a49e490cSVladimir Zapolskiy spin_lock_init(&pdata->lock);
2229c2afad6cSKamil Konieczny spin_lock_init(&pdata->hash_lock);
2230a49e490cSVladimir Zapolskiy
223189245107SNaveen Krishna Chatradhi pdata->aes_ioaddr = pdata->ioaddr + variant->aes_offset;
2232c2afad6cSKamil Konieczny pdata->io_hash_base = pdata->ioaddr + variant->hash_offset;
223389245107SNaveen Krishna Chatradhi
223496fc70b6SNaveen Krishna Chatradhi pdata->irq_fc = platform_get_irq(pdev, 0);
2235a49e490cSVladimir Zapolskiy if (pdata->irq_fc < 0) {
2236a49e490cSVladimir Zapolskiy err = pdata->irq_fc;
2237a49e490cSVladimir Zapolskiy dev_warn(dev, "feed control interrupt is not available.\n");
2238a49e490cSVladimir Zapolskiy goto err_irq;
2239a49e490cSVladimir Zapolskiy }
224007de4bc8SKrzysztof Kozlowski err = devm_request_threaded_irq(dev, pdata->irq_fc, NULL,
224107de4bc8SKrzysztof Kozlowski s5p_aes_interrupt, IRQF_ONESHOT,
224207de4bc8SKrzysztof Kozlowski pdev->name, pdev);
2243a49e490cSVladimir Zapolskiy if (err < 0) {
2244a49e490cSVladimir Zapolskiy dev_warn(dev, "feed control interrupt is not available.\n");
2245a49e490cSVladimir Zapolskiy goto err_irq;
2246a49e490cSVladimir Zapolskiy }
2247a49e490cSVladimir Zapolskiy
2248dc5e3f19SNaveen Krishna Chatradhi pdata->busy = false;
2249a49e490cSVladimir Zapolskiy pdata->dev = dev;
2250a49e490cSVladimir Zapolskiy platform_set_drvdata(pdev, pdata);
2251a49e490cSVladimir Zapolskiy s5p_dev = pdata;
2252a49e490cSVladimir Zapolskiy
2253a49e490cSVladimir Zapolskiy tasklet_init(&pdata->tasklet, s5p_tasklet_cb, (unsigned long)pdata);
2254a49e490cSVladimir Zapolskiy crypto_init_queue(&pdata->queue, CRYPTO_QUEUE_LEN);
2255a49e490cSVladimir Zapolskiy
2256a49e490cSVladimir Zapolskiy for (i = 0; i < ARRAY_SIZE(algs); i++) {
2257e6b98ce6SArd Biesheuvel err = crypto_register_skcipher(&algs[i]);
2258a49e490cSVladimir Zapolskiy if (err)
2259a49e490cSVladimir Zapolskiy goto err_algs;
2260a49e490cSVladimir Zapolskiy }
2261a49e490cSVladimir Zapolskiy
2262c2afad6cSKamil Konieczny if (pdata->use_hash) {
2263c2afad6cSKamil Konieczny tasklet_init(&pdata->hash_tasklet, s5p_hash_tasklet_cb,
2264c2afad6cSKamil Konieczny (unsigned long)pdata);
2265c2afad6cSKamil Konieczny crypto_init_queue(&pdata->hash_queue, SSS_HASH_QUEUE_LENGTH);
2266c2afad6cSKamil Konieczny
2267c2afad6cSKamil Konieczny for (hash_i = 0; hash_i < ARRAY_SIZE(algs_sha1_md5_sha256);
2268c2afad6cSKamil Konieczny hash_i++) {
2269c2afad6cSKamil Konieczny struct ahash_alg *alg;
2270c2afad6cSKamil Konieczny
2271c2afad6cSKamil Konieczny alg = &algs_sha1_md5_sha256[hash_i];
2272c2afad6cSKamil Konieczny err = crypto_register_ahash(alg);
2273c2afad6cSKamil Konieczny if (err) {
2274c2afad6cSKamil Konieczny dev_err(dev, "can't register '%s': %d\n",
2275c2afad6cSKamil Konieczny alg->halg.base.cra_driver_name, err);
2276c2afad6cSKamil Konieczny goto err_hash;
2277c2afad6cSKamil Konieczny }
2278c2afad6cSKamil Konieczny }
2279c2afad6cSKamil Konieczny }
2280c2afad6cSKamil Konieczny
2281313becd1SKrzysztof Koz?owski dev_info(dev, "s5p-sss driver registered\n");
2282a49e490cSVladimir Zapolskiy
2283a49e490cSVladimir Zapolskiy return 0;
2284a49e490cSVladimir Zapolskiy
2285c2afad6cSKamil Konieczny err_hash:
2286c2afad6cSKamil Konieczny for (j = hash_i - 1; j >= 0; j--)
2287c2afad6cSKamil Konieczny crypto_unregister_ahash(&algs_sha1_md5_sha256[j]);
2288c2afad6cSKamil Konieczny
2289c2afad6cSKamil Konieczny tasklet_kill(&pdata->hash_tasklet);
2290c2afad6cSKamil Konieczny res->end -= 0x300;
2291c2afad6cSKamil Konieczny
2292a49e490cSVladimir Zapolskiy err_algs:
2293c2afad6cSKamil Konieczny if (i < ARRAY_SIZE(algs))
2294e6b98ce6SArd Biesheuvel dev_err(dev, "can't register '%s': %d\n", algs[i].base.cra_name,
2295c2afad6cSKamil Konieczny err);
2296a49e490cSVladimir Zapolskiy
2297a49e490cSVladimir Zapolskiy for (j = 0; j < i; j++)
2298e6b98ce6SArd Biesheuvel crypto_unregister_skcipher(&algs[j]);
2299a49e490cSVladimir Zapolskiy
2300a49e490cSVladimir Zapolskiy tasklet_kill(&pdata->tasklet);
2301a49e490cSVladimir Zapolskiy
2302a49e490cSVladimir Zapolskiy err_irq:
23030918f18cSKamil Konieczny clk_disable_unprepare(pdata->pclk);
2304a49e490cSVladimir Zapolskiy
23050918f18cSKamil Konieczny err_clk:
23060918f18cSKamil Konieczny clk_disable_unprepare(pdata->clk);
2307a49e490cSVladimir Zapolskiy s5p_dev = NULL;
2308a49e490cSVladimir Zapolskiy
2309a49e490cSVladimir Zapolskiy return err;
2310a49e490cSVladimir Zapolskiy }
2311a49e490cSVladimir Zapolskiy
s5p_aes_remove(struct platform_device * pdev)2312*09f8f67fSUwe Kleine-König static void s5p_aes_remove(struct platform_device *pdev)
2313a49e490cSVladimir Zapolskiy {
2314a49e490cSVladimir Zapolskiy struct s5p_aes_dev *pdata = platform_get_drvdata(pdev);
2315a49e490cSVladimir Zapolskiy int i;
2316a49e490cSVladimir Zapolskiy
2317a49e490cSVladimir Zapolskiy for (i = 0; i < ARRAY_SIZE(algs); i++)
2318e6b98ce6SArd Biesheuvel crypto_unregister_skcipher(&algs[i]);
2319a49e490cSVladimir Zapolskiy
2320a49e490cSVladimir Zapolskiy tasklet_kill(&pdata->tasklet);
2321c2afad6cSKamil Konieczny if (pdata->use_hash) {
2322c2afad6cSKamil Konieczny for (i = ARRAY_SIZE(algs_sha1_md5_sha256) - 1; i >= 0; i--)
2323c2afad6cSKamil Konieczny crypto_unregister_ahash(&algs_sha1_md5_sha256[i]);
2324c2afad6cSKamil Konieczny
2325c2afad6cSKamil Konieczny pdata->res->end -= 0x300;
2326c2afad6cSKamil Konieczny tasklet_kill(&pdata->hash_tasklet);
2327c2afad6cSKamil Konieczny pdata->use_hash = false;
2328c2afad6cSKamil Konieczny }
2329a49e490cSVladimir Zapolskiy
23300918f18cSKamil Konieczny clk_disable_unprepare(pdata->pclk);
23310918f18cSKamil Konieczny
2332c1eb7ef2SNaveen Krishna Chatradhi clk_disable_unprepare(pdata->clk);
2333a49e490cSVladimir Zapolskiy s5p_dev = NULL;
2334a49e490cSVladimir Zapolskiy }
2335a49e490cSVladimir Zapolskiy
2336a49e490cSVladimir Zapolskiy static struct platform_driver s5p_aes_crypto = {
2337a49e490cSVladimir Zapolskiy .probe = s5p_aes_probe,
2338*09f8f67fSUwe Kleine-König .remove_new = s5p_aes_remove,
2339a49e490cSVladimir Zapolskiy .driver = {
2340a49e490cSVladimir Zapolskiy .name = "s5p-secss",
23416b9f16e6SNaveen Krishna Chatradhi .of_match_table = s5p_sss_dt_match,
2342a49e490cSVladimir Zapolskiy },
2343a49e490cSVladimir Zapolskiy };
2344a49e490cSVladimir Zapolskiy
2345741e8c2dSAxel Lin module_platform_driver(s5p_aes_crypto);
2346a49e490cSVladimir Zapolskiy
2347a49e490cSVladimir Zapolskiy MODULE_DESCRIPTION("S5PV210 AES hw acceleration support.");
2348a49e490cSVladimir Zapolskiy MODULE_LICENSE("GPL v2");
2349a49e490cSVladimir Zapolskiy MODULE_AUTHOR("Vladimir Zapolskiy <vzapolskiy@gmail.com>");
2350c2afad6cSKamil Konieczny MODULE_AUTHOR("Kamil Konieczny <k.konieczny@partner.samsung.com>");
2351