tjh.dev
Linux kernel mirror (for testing)
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linux
1/*
2 * Freescale SEC (talitos) device register and descriptor header defines
3 *
4 * Copyright (c) 2006-2011 Freescale Semiconductor, Inc.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 */
30
31#define TALITOS_TIMEOUT 100000
32#define TALITOS1_MAX_DATA_LEN 32768
33#define TALITOS2_MAX_DATA_LEN 65535
34
35#define DESC_TYPE(desc_hdr) ((be32_to_cpu(desc_hdr) >> 3) & 0x1f)
36#define PRIMARY_EU(desc_hdr) ((be32_to_cpu(desc_hdr) >> 28) & 0xf)
37#define SECONDARY_EU(desc_hdr) ((be32_to_cpu(desc_hdr) >> 16) & 0xf)
38
39/* descriptor pointer entry */
40struct talitos_ptr {
41 union {
42 struct { /* SEC2 format */
43 __be16 len; /* length */
44 u8 j_extent; /* jump to sg link table and/or extent*/
45 u8 eptr; /* extended address */
46 };
47 struct { /* SEC1 format */
48 __be16 res;
49 __be16 len1; /* length */
50 };
51 };
52 __be32 ptr; /* address */
53};
54
55/* descriptor */
56struct talitos_desc {
57 __be32 hdr; /* header high bits */
58 union {
59 __be32 hdr_lo; /* header low bits */
60 __be32 hdr1; /* header for SEC1 */
61 };
62 struct talitos_ptr ptr[7]; /* ptr/len pair array */
63 __be32 next_desc; /* next descriptor (SEC1) */
64};
65
66#define TALITOS_DESC_SIZE (sizeof(struct talitos_desc) - sizeof(__be32))
67
68/**
69 * talitos_request - descriptor submission request
70 * @desc: descriptor pointer (kernel virtual)
71 * @dma_desc: descriptor's physical bus address
72 * @callback: whom to call when descriptor processing is done
73 * @context: caller context (optional)
74 */
75struct talitos_request {
76 struct talitos_desc *desc;
77 dma_addr_t dma_desc;
78 void (*callback) (struct device *dev, struct talitos_desc *desc,
79 void *context, int error);
80 void *context;
81};
82
83/* per-channel fifo management */
84struct talitos_channel {
85 void __iomem *reg;
86
87 /* request fifo */
88 struct talitos_request *fifo;
89
90 /* number of requests pending in channel h/w fifo */
91 atomic_t submit_count ____cacheline_aligned;
92
93 /* request submission (head) lock */
94 spinlock_t head_lock ____cacheline_aligned;
95 /* index to next free descriptor request */
96 int head;
97
98 /* request release (tail) lock */
99 spinlock_t tail_lock ____cacheline_aligned;
100 /* index to next in-progress/done descriptor request */
101 int tail;
102};
103
104struct talitos_private {
105 struct device *dev;
106 struct platform_device *ofdev;
107 void __iomem *reg;
108 void __iomem *reg_deu;
109 void __iomem *reg_aesu;
110 void __iomem *reg_mdeu;
111 void __iomem *reg_afeu;
112 void __iomem *reg_rngu;
113 void __iomem *reg_pkeu;
114 void __iomem *reg_keu;
115 void __iomem *reg_crcu;
116 int irq[2];
117
118 /* SEC global registers lock */
119 spinlock_t reg_lock ____cacheline_aligned;
120
121 /* SEC version geometry (from device tree node) */
122 unsigned int num_channels;
123 unsigned int chfifo_len;
124 unsigned int exec_units;
125 unsigned int desc_types;
126
127 /* SEC Compatibility info */
128 unsigned long features;
129
130 /*
131 * length of the request fifo
132 * fifo_len is chfifo_len rounded up to next power of 2
133 * so we can use bitwise ops to wrap
134 */
135 unsigned int fifo_len;
136
137 struct talitos_channel *chan;
138
139 /* next channel to be assigned next incoming descriptor */
140 atomic_t last_chan ____cacheline_aligned;
141
142 /* request callback tasklet */
143 struct tasklet_struct done_task[2];
144
145 /* list of registered algorithms */
146 struct list_head alg_list;
147
148 /* hwrng device */
149 struct hwrng rng;
150 bool rng_registered;
151};
152
153extern int talitos_submit(struct device *dev, int ch, struct talitos_desc *desc,
154 void (*callback)(struct device *dev,
155 struct talitos_desc *desc,
156 void *context, int error),
157 void *context);
158
159/* .features flag */
160#define TALITOS_FTR_SRC_LINK_TBL_LEN_INCLUDES_EXTENT 0x00000001
161#define TALITOS_FTR_HW_AUTH_CHECK 0x00000002
162#define TALITOS_FTR_SHA224_HWINIT 0x00000004
163#define TALITOS_FTR_HMAC_OK 0x00000008
164#define TALITOS_FTR_SEC1 0x00000010
165
166/*
167 * If both CONFIG_CRYPTO_DEV_TALITOS1 and CONFIG_CRYPTO_DEV_TALITOS2 are
168 * defined, we check the features which are set according to the device tree.
169 * Otherwise, we answer true or false directly
170 */
171static inline bool has_ftr_sec1(struct talitos_private *priv)
172{
173#if defined(CONFIG_CRYPTO_DEV_TALITOS1) && defined(CONFIG_CRYPTO_DEV_TALITOS2)
174 return priv->features & TALITOS_FTR_SEC1 ? true : false;
175#elif defined(CONFIG_CRYPTO_DEV_TALITOS1)
176 return true;
177#else
178 return false;
179#endif
180}
181
182/*
183 * TALITOS_xxx_LO addresses point to the low data bits (32-63) of the register
184 */
185
186#define ISR1_FORMAT(x) (((x) << 28) | ((x) << 16))
187#define ISR2_FORMAT(x) (((x) << 4) | (x))
188
189/* global register offset addresses */
190#define TALITOS_MCR 0x1030 /* master control register */
191#define TALITOS_MCR_RCA0 (1 << 15) /* remap channel 0 */
192#define TALITOS_MCR_RCA1 (1 << 14) /* remap channel 1 */
193#define TALITOS_MCR_RCA2 (1 << 13) /* remap channel 2 */
194#define TALITOS_MCR_RCA3 (1 << 12) /* remap channel 3 */
195#define TALITOS1_MCR_SWR 0x1000000 /* s/w reset */
196#define TALITOS2_MCR_SWR 0x1 /* s/w reset */
197#define TALITOS_MCR_LO 0x1034
198#define TALITOS_IMR 0x1008 /* interrupt mask register */
199/* enable channel IRQs */
200#define TALITOS1_IMR_INIT ISR1_FORMAT(0xf)
201#define TALITOS1_IMR_DONE ISR1_FORMAT(0x5) /* done IRQs */
202/* enable channel IRQs */
203#define TALITOS2_IMR_INIT (ISR2_FORMAT(0xf) | 0x10000)
204#define TALITOS2_IMR_DONE ISR1_FORMAT(0x5) /* done IRQs */
205#define TALITOS_IMR_LO 0x100C
206#define TALITOS1_IMR_LO_INIT 0x2000000 /* allow RNGU error IRQs */
207#define TALITOS2_IMR_LO_INIT 0x20000 /* allow RNGU error IRQs */
208#define TALITOS_ISR 0x1010 /* interrupt status register */
209#define TALITOS1_ISR_4CHERR ISR1_FORMAT(0xa) /* 4 ch errors mask */
210#define TALITOS1_ISR_4CHDONE ISR1_FORMAT(0x5) /* 4 ch done mask */
211#define TALITOS1_ISR_CH_0_ERR (2 << 28) /* ch 0 errors mask */
212#define TALITOS1_ISR_CH_0_DONE (1 << 28) /* ch 0 done mask */
213#define TALITOS1_ISR_TEA_ERR 0x00000040
214#define TALITOS2_ISR_4CHERR ISR2_FORMAT(0xa) /* 4 ch errors mask */
215#define TALITOS2_ISR_4CHDONE ISR2_FORMAT(0x5) /* 4 ch done mask */
216#define TALITOS2_ISR_CH_0_ERR 2 /* ch 0 errors mask */
217#define TALITOS2_ISR_CH_0_DONE 1 /* ch 0 done mask */
218#define TALITOS2_ISR_CH_0_2_ERR ISR2_FORMAT(0x2) /* ch 0, 2 err mask */
219#define TALITOS2_ISR_CH_0_2_DONE ISR2_FORMAT(0x1) /* ch 0, 2 done mask */
220#define TALITOS2_ISR_CH_1_3_ERR ISR2_FORMAT(0x8) /* ch 1, 3 err mask */
221#define TALITOS2_ISR_CH_1_3_DONE ISR2_FORMAT(0x4) /* ch 1, 3 done mask */
222#define TALITOS_ISR_LO 0x1014
223#define TALITOS_ICR 0x1018 /* interrupt clear register */
224#define TALITOS_ICR_LO 0x101C
225
226/* channel register address stride */
227#define TALITOS_CH_BASE_OFFSET 0x1000 /* default channel map base */
228#define TALITOS1_CH_STRIDE 0x1000
229#define TALITOS2_CH_STRIDE 0x100
230
231/* channel configuration register */
232#define TALITOS_CCCR 0x8
233#define TALITOS2_CCCR_CONT 0x2 /* channel continue on SEC2 */
234#define TALITOS2_CCCR_RESET 0x1 /* channel reset on SEC2 */
235#define TALITOS_CCCR_LO 0xc
236#define TALITOS_CCCR_LO_IWSE 0x80 /* chan. ICCR writeback enab. */
237#define TALITOS_CCCR_LO_EAE 0x20 /* extended address enable */
238#define TALITOS_CCCR_LO_CDWE 0x10 /* chan. done writeback enab. */
239#define TALITOS_CCCR_LO_NE 0x8 /* fetch next descriptor enab. */
240#define TALITOS_CCCR_LO_NT 0x4 /* notification type */
241#define TALITOS_CCCR_LO_CDIE 0x2 /* channel done IRQ enable */
242#define TALITOS1_CCCR_LO_RESET 0x1 /* channel reset on SEC1 */
243
244/* CCPSR: channel pointer status register */
245#define TALITOS_CCPSR 0x10
246#define TALITOS_CCPSR_LO 0x14
247#define TALITOS_CCPSR_LO_DOF 0x8000 /* double FF write oflow error */
248#define TALITOS_CCPSR_LO_SOF 0x4000 /* single FF write oflow error */
249#define TALITOS_CCPSR_LO_MDTE 0x2000 /* master data transfer error */
250#define TALITOS_CCPSR_LO_SGDLZ 0x1000 /* s/g data len zero error */
251#define TALITOS_CCPSR_LO_FPZ 0x0800 /* fetch ptr zero error */
252#define TALITOS_CCPSR_LO_IDH 0x0400 /* illegal desc hdr error */
253#define TALITOS_CCPSR_LO_IEU 0x0200 /* invalid EU error */
254#define TALITOS_CCPSR_LO_EU 0x0100 /* EU error detected */
255#define TALITOS_CCPSR_LO_GB 0x0080 /* gather boundary error */
256#define TALITOS_CCPSR_LO_GRL 0x0040 /* gather return/length error */
257#define TALITOS_CCPSR_LO_SB 0x0020 /* scatter boundary error */
258#define TALITOS_CCPSR_LO_SRL 0x0010 /* scatter return/length error */
259
260/* channel fetch fifo register */
261#define TALITOS_FF 0x48
262#define TALITOS_FF_LO 0x4c
263
264/* current descriptor pointer register */
265#define TALITOS_CDPR 0x40
266#define TALITOS_CDPR_LO 0x44
267
268/* descriptor buffer register */
269#define TALITOS_DESCBUF 0x80
270#define TALITOS_DESCBUF_LO 0x84
271
272/* gather link table */
273#define TALITOS_GATHER 0xc0
274#define TALITOS_GATHER_LO 0xc4
275
276/* scatter link table */
277#define TALITOS_SCATTER 0xe0
278#define TALITOS_SCATTER_LO 0xe4
279
280/* execution unit registers base */
281#define TALITOS2_DEU 0x2000
282#define TALITOS2_AESU 0x4000
283#define TALITOS2_MDEU 0x6000
284#define TALITOS2_AFEU 0x8000
285#define TALITOS2_RNGU 0xa000
286#define TALITOS2_PKEU 0xc000
287#define TALITOS2_KEU 0xe000
288#define TALITOS2_CRCU 0xf000
289
290#define TALITOS12_AESU 0x4000
291#define TALITOS12_DEU 0x5000
292#define TALITOS12_MDEU 0x6000
293
294#define TALITOS10_AFEU 0x8000
295#define TALITOS10_DEU 0xa000
296#define TALITOS10_MDEU 0xc000
297#define TALITOS10_RNGU 0xe000
298#define TALITOS10_PKEU 0x10000
299#define TALITOS10_AESU 0x12000
300
301/* execution unit interrupt status registers */
302#define TALITOS_EUDSR 0x10 /* data size */
303#define TALITOS_EUDSR_LO 0x14
304#define TALITOS_EURCR 0x18 /* reset control*/
305#define TALITOS_EURCR_LO 0x1c
306#define TALITOS_EUSR 0x28 /* rng status */
307#define TALITOS_EUSR_LO 0x2c
308#define TALITOS_EUISR 0x30
309#define TALITOS_EUISR_LO 0x34
310#define TALITOS_EUICR 0x38 /* int. control */
311#define TALITOS_EUICR_LO 0x3c
312#define TALITOS_EU_FIFO 0x800 /* output FIFO */
313#define TALITOS_EU_FIFO_LO 0x804 /* output FIFO */
314/* DES unit */
315#define TALITOS1_DEUICR_KPE 0x00200000 /* Key Parity Error */
316/* message digest unit */
317#define TALITOS_MDEUICR_LO_ICE 0x4000 /* integrity check IRQ enable */
318/* random number unit */
319#define TALITOS_RNGUSR_LO_RD 0x1 /* reset done */
320#define TALITOS_RNGUSR_LO_OFL 0xff0000/* output FIFO length */
321#define TALITOS_RNGURCR_LO_SR 0x1 /* software reset */
322
323#define TALITOS_MDEU_CONTEXT_SIZE_MD5_SHA1_SHA256 0x28
324#define TALITOS_MDEU_CONTEXT_SIZE_SHA384_SHA512 0x48
325
326/*
327 * talitos descriptor header (hdr) bits
328 */
329
330/* written back when done */
331#define DESC_HDR_DONE cpu_to_be32(0xff000000)
332#define DESC_HDR_LO_ICCR1_MASK cpu_to_be32(0x00180000)
333#define DESC_HDR_LO_ICCR1_PASS cpu_to_be32(0x00080000)
334#define DESC_HDR_LO_ICCR1_FAIL cpu_to_be32(0x00100000)
335
336/* primary execution unit select */
337#define DESC_HDR_SEL0_MASK cpu_to_be32(0xf0000000)
338#define DESC_HDR_SEL0_AFEU cpu_to_be32(0x10000000)
339#define DESC_HDR_SEL0_DEU cpu_to_be32(0x20000000)
340#define DESC_HDR_SEL0_MDEUA cpu_to_be32(0x30000000)
341#define DESC_HDR_SEL0_MDEUB cpu_to_be32(0xb0000000)
342#define DESC_HDR_SEL0_RNG cpu_to_be32(0x40000000)
343#define DESC_HDR_SEL0_PKEU cpu_to_be32(0x50000000)
344#define DESC_HDR_SEL0_AESU cpu_to_be32(0x60000000)
345#define DESC_HDR_SEL0_KEU cpu_to_be32(0x70000000)
346#define DESC_HDR_SEL0_CRCU cpu_to_be32(0x80000000)
347
348/* primary execution unit mode (MODE0) and derivatives */
349#define DESC_HDR_MODE0_ENCRYPT cpu_to_be32(0x00100000)
350#define DESC_HDR_MODE0_AESU_CBC cpu_to_be32(0x00200000)
351#define DESC_HDR_MODE0_AESU_CTR cpu_to_be32(0x00600000)
352#define DESC_HDR_MODE0_DEU_CBC cpu_to_be32(0x00400000)
353#define DESC_HDR_MODE0_DEU_3DES cpu_to_be32(0x00200000)
354#define DESC_HDR_MODE0_MDEU_CONT cpu_to_be32(0x08000000)
355#define DESC_HDR_MODE0_MDEU_INIT cpu_to_be32(0x01000000)
356#define DESC_HDR_MODE0_MDEU_HMAC cpu_to_be32(0x00800000)
357#define DESC_HDR_MODE0_MDEU_PAD cpu_to_be32(0x00400000)
358#define DESC_HDR_MODE0_MDEU_SHA224 cpu_to_be32(0x00300000)
359#define DESC_HDR_MODE0_MDEU_MD5 cpu_to_be32(0x00200000)
360#define DESC_HDR_MODE0_MDEU_SHA256 cpu_to_be32(0x00100000)
361#define DESC_HDR_MODE0_MDEU_SHA1 cpu_to_be32(0x00000000)
362#define DESC_HDR_MODE0_MDEUB_SHA384 cpu_to_be32(0x00000000)
363#define DESC_HDR_MODE0_MDEUB_SHA512 cpu_to_be32(0x00200000)
364#define DESC_HDR_MODE0_MDEU_MD5_HMAC (DESC_HDR_MODE0_MDEU_MD5 | \
365 DESC_HDR_MODE0_MDEU_HMAC)
366#define DESC_HDR_MODE0_MDEU_SHA256_HMAC (DESC_HDR_MODE0_MDEU_SHA256 | \
367 DESC_HDR_MODE0_MDEU_HMAC)
368#define DESC_HDR_MODE0_MDEU_SHA1_HMAC (DESC_HDR_MODE0_MDEU_SHA1 | \
369 DESC_HDR_MODE0_MDEU_HMAC)
370
371/* secondary execution unit select (SEL1) */
372#define DESC_HDR_SEL1_MASK cpu_to_be32(0x000f0000)
373#define DESC_HDR_SEL1_MDEUA cpu_to_be32(0x00030000)
374#define DESC_HDR_SEL1_MDEUB cpu_to_be32(0x000b0000)
375#define DESC_HDR_SEL1_CRCU cpu_to_be32(0x00080000)
376
377/* secondary execution unit mode (MODE1) and derivatives */
378#define DESC_HDR_MODE1_MDEU_CICV cpu_to_be32(0x00004000)
379#define DESC_HDR_MODE1_MDEU_INIT cpu_to_be32(0x00001000)
380#define DESC_HDR_MODE1_MDEU_HMAC cpu_to_be32(0x00000800)
381#define DESC_HDR_MODE1_MDEU_PAD cpu_to_be32(0x00000400)
382#define DESC_HDR_MODE1_MDEU_SHA224 cpu_to_be32(0x00000300)
383#define DESC_HDR_MODE1_MDEU_MD5 cpu_to_be32(0x00000200)
384#define DESC_HDR_MODE1_MDEU_SHA256 cpu_to_be32(0x00000100)
385#define DESC_HDR_MODE1_MDEU_SHA1 cpu_to_be32(0x00000000)
386#define DESC_HDR_MODE1_MDEUB_SHA384 cpu_to_be32(0x00000000)
387#define DESC_HDR_MODE1_MDEUB_SHA512 cpu_to_be32(0x00000200)
388#define DESC_HDR_MODE1_MDEU_MD5_HMAC (DESC_HDR_MODE1_MDEU_MD5 | \
389 DESC_HDR_MODE1_MDEU_HMAC)
390#define DESC_HDR_MODE1_MDEU_SHA256_HMAC (DESC_HDR_MODE1_MDEU_SHA256 | \
391 DESC_HDR_MODE1_MDEU_HMAC)
392#define DESC_HDR_MODE1_MDEU_SHA1_HMAC (DESC_HDR_MODE1_MDEU_SHA1 | \
393 DESC_HDR_MODE1_MDEU_HMAC)
394#define DESC_HDR_MODE1_MDEU_SHA224_HMAC (DESC_HDR_MODE1_MDEU_SHA224 | \
395 DESC_HDR_MODE1_MDEU_HMAC)
396#define DESC_HDR_MODE1_MDEUB_SHA384_HMAC (DESC_HDR_MODE1_MDEUB_SHA384 | \
397 DESC_HDR_MODE1_MDEU_HMAC)
398#define DESC_HDR_MODE1_MDEUB_SHA512_HMAC (DESC_HDR_MODE1_MDEUB_SHA512 | \
399 DESC_HDR_MODE1_MDEU_HMAC)
400
401/* direction of overall data flow (DIR) */
402#define DESC_HDR_DIR_INBOUND cpu_to_be32(0x00000002)
403
404/* request done notification (DN) */
405#define DESC_HDR_DONE_NOTIFY cpu_to_be32(0x00000001)
406
407/* descriptor types */
408#define DESC_HDR_TYPE_AESU_CTR_NONSNOOP cpu_to_be32(0 << 3)
409#define DESC_HDR_TYPE_IPSEC_ESP cpu_to_be32(1 << 3)
410#define DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU cpu_to_be32(2 << 3)
411#define DESC_HDR_TYPE_HMAC_SNOOP_NO_AFEU cpu_to_be32(4 << 3)
412
413/* link table extent field bits */
414#define DESC_PTR_LNKTBL_JUMP 0x80
415#define DESC_PTR_LNKTBL_RETURN 0x02
416#define DESC_PTR_LNKTBL_NEXT 0x01