blob: d420ec751c7c9e090710f568f9b4370591c09110 [file] [log] [blame]
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001/*
2 * Cryptographic API.
3 *
4 * Support for OMAP AES HW acceleration.
5 *
6 * Copyright (c) 2010 Nokia Corporation
7 * Author: Dmitry Kasatkin <dmitry.kasatkin@nokia.com>
Mark A. Greer0d355832013-01-08 11:57:46 -07008 * Copyright (c) 2011 Texas Instruments Incorporated
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08009 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as published
12 * by the Free Software Foundation.
13 *
14 */
15
Joel Fernandes016af9b2013-08-18 00:56:11 -050016#define pr_fmt(fmt) "%20s: " fmt, __func__
17#define prn(num) pr_debug(#num "=%d\n", num)
18#define prx(num) pr_debug(#num "=%x\n", num)
Dmitry Kasatkin537559a2010-09-03 19:16:02 +080019
20#include <linux/err.h>
21#include <linux/module.h>
22#include <linux/init.h>
23#include <linux/errno.h>
24#include <linux/kernel.h>
Dmitry Kasatkin537559a2010-09-03 19:16:02 +080025#include <linux/platform_device.h>
26#include <linux/scatterlist.h>
27#include <linux/dma-mapping.h>
Mark A. Greerebedbf72013-01-08 11:57:42 -070028#include <linux/dmaengine.h>
29#include <linux/omap-dma.h>
Mark A. Greer5946c4a2013-01-08 11:57:40 -070030#include <linux/pm_runtime.h>
Mark A. Greerbc69d122013-01-08 11:57:44 -070031#include <linux/of.h>
32#include <linux/of_device.h>
33#include <linux/of_address.h>
Dmitry Kasatkin537559a2010-09-03 19:16:02 +080034#include <linux/io.h>
35#include <linux/crypto.h>
36#include <linux/interrupt.h>
37#include <crypto/scatterwalk.h>
38#include <crypto/aes.h>
Baolin Wang05299002016-01-26 20:25:40 +080039#include <crypto/algapi.h>
Dmitry Kasatkin537559a2010-09-03 19:16:02 +080040
Mark A. Greerebedbf72013-01-08 11:57:42 -070041#define DST_MAXBURST 4
42#define DMA_MIN (DST_MAXBURST * sizeof(u32))
Dmitry Kasatkin537559a2010-09-03 19:16:02 +080043
Joel Fernandes1bf95cc2013-08-17 21:42:29 -050044#define _calc_walked(inout) (dd->inout##_walk.offset - dd->inout##_sg->offset)
45
Dmitry Kasatkin537559a2010-09-03 19:16:02 +080046/* OMAP TRM gives bitfields as start:end, where start is the higher bit
47 number. For example 7:0 */
48#define FLD_MASK(start, end) (((1 << ((start) - (end) + 1)) - 1) << (end))
49#define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end))
50
Mark A. Greer0d355832013-01-08 11:57:46 -070051#define AES_REG_KEY(dd, x) ((dd)->pdata->key_ofs - \
52 ((x ^ 0x01) * 0x04))
53#define AES_REG_IV(dd, x) ((dd)->pdata->iv_ofs + ((x) * 0x04))
Dmitry Kasatkin537559a2010-09-03 19:16:02 +080054
Mark A. Greer0d355832013-01-08 11:57:46 -070055#define AES_REG_CTRL(dd) ((dd)->pdata->ctrl_ofs)
Vutla, Lokesh340d9d32015-07-07 21:01:46 +053056#define AES_REG_CTRL_CTR_WIDTH_MASK GENMASK(8, 7)
57#define AES_REG_CTRL_CTR_WIDTH_32 0
58#define AES_REG_CTRL_CTR_WIDTH_64 BIT(7)
59#define AES_REG_CTRL_CTR_WIDTH_96 BIT(8)
60#define AES_REG_CTRL_CTR_WIDTH_128 GENMASK(8, 7)
61#define AES_REG_CTRL_CTR BIT(6)
62#define AES_REG_CTRL_CBC BIT(5)
63#define AES_REG_CTRL_KEY_SIZE GENMASK(4, 3)
64#define AES_REG_CTRL_DIRECTION BIT(2)
65#define AES_REG_CTRL_INPUT_READY BIT(1)
66#define AES_REG_CTRL_OUTPUT_READY BIT(0)
Vutla, Lokesh5396c6c2015-07-07 21:01:45 +053067#define AES_REG_CTRL_MASK GENMASK(24, 2)
Dmitry Kasatkin537559a2010-09-03 19:16:02 +080068
Mark A. Greer0d355832013-01-08 11:57:46 -070069#define AES_REG_DATA_N(dd, x) ((dd)->pdata->data_ofs + ((x) * 0x04))
Dmitry Kasatkin537559a2010-09-03 19:16:02 +080070
Mark A. Greer0d355832013-01-08 11:57:46 -070071#define AES_REG_REV(dd) ((dd)->pdata->rev_ofs)
Dmitry Kasatkin537559a2010-09-03 19:16:02 +080072
Mark A. Greer0d355832013-01-08 11:57:46 -070073#define AES_REG_MASK(dd) ((dd)->pdata->mask_ofs)
Vutla, Lokesh340d9d32015-07-07 21:01:46 +053074#define AES_REG_MASK_SIDLE BIT(6)
75#define AES_REG_MASK_START BIT(5)
76#define AES_REG_MASK_DMA_OUT_EN BIT(3)
77#define AES_REG_MASK_DMA_IN_EN BIT(2)
78#define AES_REG_MASK_SOFTRESET BIT(1)
79#define AES_REG_AUTOIDLE BIT(0)
Dmitry Kasatkin537559a2010-09-03 19:16:02 +080080
Mark A. Greer0d355832013-01-08 11:57:46 -070081#define AES_REG_LENGTH_N(x) (0x54 + ((x) * 0x04))
Dmitry Kasatkin537559a2010-09-03 19:16:02 +080082
Joel Fernandes67216752013-08-17 21:42:28 -050083#define AES_REG_IRQ_STATUS(dd) ((dd)->pdata->irq_status_ofs)
84#define AES_REG_IRQ_ENABLE(dd) ((dd)->pdata->irq_enable_ofs)
85#define AES_REG_IRQ_DATA_IN BIT(1)
86#define AES_REG_IRQ_DATA_OUT BIT(2)
Dmitry Kasatkin537559a2010-09-03 19:16:02 +080087#define DEFAULT_TIMEOUT (5*HZ)
88
89#define FLAGS_MODE_MASK 0x000f
90#define FLAGS_ENCRYPT BIT(0)
91#define FLAGS_CBC BIT(1)
92#define FLAGS_GIV BIT(2)
Mark A. Greerf9fb69e2013-01-08 11:57:47 -070093#define FLAGS_CTR BIT(3)
Dmitry Kasatkin537559a2010-09-03 19:16:02 +080094
Dmitry Kasatkin67a730c2010-11-30 10:13:30 +020095#define FLAGS_INIT BIT(4)
96#define FLAGS_FAST BIT(5)
97#define FLAGS_BUSY BIT(6)
Dmitry Kasatkin537559a2010-09-03 19:16:02 +080098
Joel Fernandes1bf95cc2013-08-17 21:42:29 -050099#define AES_BLOCK_WORDS (AES_BLOCK_SIZE >> 2)
100
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800101struct omap_aes_ctx {
102 struct omap_aes_dev *dd;
103
104 int keylen;
105 u32 key[AES_KEYSIZE_256 / sizeof(u32)];
106 unsigned long flags;
107};
108
109struct omap_aes_reqctx {
110 unsigned long mode;
111};
112
113#define OMAP_AES_QUEUE_LENGTH 1
114#define OMAP_AES_CACHE_SIZE 0
115
Mark A. Greerf9fb69e2013-01-08 11:57:47 -0700116struct omap_aes_algs_info {
117 struct crypto_alg *algs_list;
118 unsigned int size;
119 unsigned int registered;
120};
121
Mark A. Greer0d355832013-01-08 11:57:46 -0700122struct omap_aes_pdata {
Mark A. Greerf9fb69e2013-01-08 11:57:47 -0700123 struct omap_aes_algs_info *algs_info;
124 unsigned int algs_info_size;
125
Mark A. Greer0d355832013-01-08 11:57:46 -0700126 void (*trigger)(struct omap_aes_dev *dd, int length);
127
128 u32 key_ofs;
129 u32 iv_ofs;
130 u32 ctrl_ofs;
131 u32 data_ofs;
132 u32 rev_ofs;
133 u32 mask_ofs;
Joel Fernandes67216752013-08-17 21:42:28 -0500134 u32 irq_enable_ofs;
135 u32 irq_status_ofs;
Mark A. Greer0d355832013-01-08 11:57:46 -0700136
137 u32 dma_enable_in;
138 u32 dma_enable_out;
139 u32 dma_start;
140
141 u32 major_mask;
142 u32 major_shift;
143 u32 minor_mask;
144 u32 minor_shift;
145};
146
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800147struct omap_aes_dev {
148 struct list_head list;
149 unsigned long phys_base;
Dmitry Kasatkinefce41b2010-11-30 10:13:32 +0200150 void __iomem *io_base;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800151 struct omap_aes_ctx *ctx;
152 struct device *dev;
153 unsigned long flags;
Dmitry Kasatkin21fe9762010-11-30 10:13:29 +0200154 int err;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800155
Dmitry Kasatkin21fe9762010-11-30 10:13:29 +0200156 struct tasklet_struct done_task;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800157
158 struct ablkcipher_request *req;
Baolin Wang05299002016-01-26 20:25:40 +0800159 struct crypto_engine *engine;
Joel Fernandes62423322013-08-17 21:42:32 -0500160
161 /*
162 * total is used by PIO mode for book keeping so introduce
163 * variable total_save as need it to calc page_order
164 */
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800165 size_t total;
Joel Fernandes62423322013-08-17 21:42:32 -0500166 size_t total_save;
167
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800168 struct scatterlist *in_sg;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800169 struct scatterlist *out_sg;
Joel Fernandes62423322013-08-17 21:42:32 -0500170
171 /* Buffers for copying for unaligned cases */
172 struct scatterlist in_sgl;
173 struct scatterlist out_sgl;
174 struct scatterlist *orig_out;
175 int sgs_copied;
176
Joel Fernandes1bf95cc2013-08-17 21:42:29 -0500177 struct scatter_walk in_walk;
178 struct scatter_walk out_walk;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800179 int dma_in;
Mark A. Greerebedbf72013-01-08 11:57:42 -0700180 struct dma_chan *dma_lch_in;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800181 int dma_out;
Mark A. Greerebedbf72013-01-08 11:57:42 -0700182 struct dma_chan *dma_lch_out;
Joel Fernandese77c7562013-08-17 21:42:24 -0500183 int in_sg_len;
184 int out_sg_len;
Joel Fernandes98837ab2013-08-17 21:42:30 -0500185 int pio_only;
Mark A. Greer0d355832013-01-08 11:57:46 -0700186 const struct omap_aes_pdata *pdata;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800187};
188
189/* keep registered devices data here */
190static LIST_HEAD(dev_list);
191static DEFINE_SPINLOCK(list_lock);
192
Joel Fernandes016af9b2013-08-18 00:56:11 -0500193#ifdef DEBUG
194#define omap_aes_read(dd, offset) \
195({ \
196 int _read_ret; \
197 _read_ret = __raw_readl(dd->io_base + offset); \
198 pr_debug("omap_aes_read(" #offset "=%#x)= %#x\n", \
199 offset, _read_ret); \
200 _read_ret; \
201})
202#else
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800203static inline u32 omap_aes_read(struct omap_aes_dev *dd, u32 offset)
204{
205 return __raw_readl(dd->io_base + offset);
206}
Joel Fernandes016af9b2013-08-18 00:56:11 -0500207#endif
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800208
Joel Fernandes016af9b2013-08-18 00:56:11 -0500209#ifdef DEBUG
210#define omap_aes_write(dd, offset, value) \
211 do { \
212 pr_debug("omap_aes_write(" #offset "=%#x) value=%#x\n", \
213 offset, value); \
214 __raw_writel(value, dd->io_base + offset); \
215 } while (0)
216#else
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800217static inline void omap_aes_write(struct omap_aes_dev *dd, u32 offset,
218 u32 value)
219{
220 __raw_writel(value, dd->io_base + offset);
221}
Joel Fernandes016af9b2013-08-18 00:56:11 -0500222#endif
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800223
224static inline void omap_aes_write_mask(struct omap_aes_dev *dd, u32 offset,
225 u32 value, u32 mask)
226{
227 u32 val;
228
229 val = omap_aes_read(dd, offset);
230 val &= ~mask;
231 val |= value;
232 omap_aes_write(dd, offset, val);
233}
234
235static void omap_aes_write_n(struct omap_aes_dev *dd, u32 offset,
236 u32 *value, int count)
237{
238 for (; count--; value++, offset += 4)
239 omap_aes_write(dd, offset, *value);
240}
241
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800242static int omap_aes_hw_init(struct omap_aes_dev *dd)
243{
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800244 if (!(dd->flags & FLAGS_INIT)) {
Dmitry Kasatkineeb2b202010-11-30 10:13:28 +0200245 dd->flags |= FLAGS_INIT;
Dmitry Kasatkin21fe9762010-11-30 10:13:29 +0200246 dd->err = 0;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800247 }
248
Dmitry Kasatkineeb2b202010-11-30 10:13:28 +0200249 return 0;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800250}
251
Dmitry Kasatkin21fe9762010-11-30 10:13:29 +0200252static int omap_aes_write_ctrl(struct omap_aes_dev *dd)
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800253{
254 unsigned int key32;
Dmitry Kasatkin67a730c2010-11-30 10:13:30 +0200255 int i, err;
Vutla, Lokesh5396c6c2015-07-07 21:01:45 +0530256 u32 val;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800257
Dmitry Kasatkin21fe9762010-11-30 10:13:29 +0200258 err = omap_aes_hw_init(dd);
259 if (err)
260 return err;
261
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800262 key32 = dd->ctx->keylen / sizeof(u32);
Dmitry Kasatkin67a730c2010-11-30 10:13:30 +0200263
264 /* it seems a key should always be set even if it has not changed */
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800265 for (i = 0; i < key32; i++) {
Mark A. Greer0d355832013-01-08 11:57:46 -0700266 omap_aes_write(dd, AES_REG_KEY(dd, i),
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800267 __le32_to_cpu(dd->ctx->key[i]));
268 }
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800269
Mark A. Greerf9fb69e2013-01-08 11:57:47 -0700270 if ((dd->flags & (FLAGS_CBC | FLAGS_CTR)) && dd->req->info)
Mark A. Greer0d355832013-01-08 11:57:46 -0700271 omap_aes_write_n(dd, AES_REG_IV(dd, 0), dd->req->info, 4);
Dmitry Kasatkin67a730c2010-11-30 10:13:30 +0200272
273 val = FLD_VAL(((dd->ctx->keylen >> 3) - 1), 4, 3);
274 if (dd->flags & FLAGS_CBC)
275 val |= AES_REG_CTRL_CBC;
Vutla, Lokesh5396c6c2015-07-07 21:01:45 +0530276 if (dd->flags & FLAGS_CTR)
Joel Fernandes8ed49c72013-10-29 17:37:38 -0500277 val |= AES_REG_CTRL_CTR | AES_REG_CTRL_CTR_WIDTH_128;
Vutla, Lokesh5396c6c2015-07-07 21:01:45 +0530278
Dmitry Kasatkin67a730c2010-11-30 10:13:30 +0200279 if (dd->flags & FLAGS_ENCRYPT)
280 val |= AES_REG_CTRL_DIRECTION;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800281
Vutla, Lokesh5396c6c2015-07-07 21:01:45 +0530282 omap_aes_write_mask(dd, AES_REG_CTRL(dd), val, AES_REG_CTRL_MASK);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800283
Dmitry Kasatkin21fe9762010-11-30 10:13:29 +0200284 return 0;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800285}
286
Mark A. Greer0d355832013-01-08 11:57:46 -0700287static void omap_aes_dma_trigger_omap2(struct omap_aes_dev *dd, int length)
288{
289 u32 mask, val;
290
291 val = dd->pdata->dma_start;
292
293 if (dd->dma_lch_out != NULL)
294 val |= dd->pdata->dma_enable_out;
295 if (dd->dma_lch_in != NULL)
296 val |= dd->pdata->dma_enable_in;
297
298 mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in |
299 dd->pdata->dma_start;
300
301 omap_aes_write_mask(dd, AES_REG_MASK(dd), val, mask);
302
303}
304
305static void omap_aes_dma_trigger_omap4(struct omap_aes_dev *dd, int length)
306{
307 omap_aes_write(dd, AES_REG_LENGTH_N(0), length);
308 omap_aes_write(dd, AES_REG_LENGTH_N(1), 0);
309
310 omap_aes_dma_trigger_omap2(dd, length);
311}
312
313static void omap_aes_dma_stop(struct omap_aes_dev *dd)
314{
315 u32 mask;
316
317 mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in |
318 dd->pdata->dma_start;
319
320 omap_aes_write_mask(dd, AES_REG_MASK(dd), 0, mask);
321}
322
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800323static struct omap_aes_dev *omap_aes_find_dev(struct omap_aes_ctx *ctx)
324{
325 struct omap_aes_dev *dd = NULL, *tmp;
326
327 spin_lock_bh(&list_lock);
328 if (!ctx->dd) {
329 list_for_each_entry(tmp, &dev_list, list) {
330 /* FIXME: take fist available aes core */
331 dd = tmp;
332 break;
333 }
334 ctx->dd = dd;
335 } else {
336 /* already found before */
337 dd = ctx->dd;
338 }
339 spin_unlock_bh(&list_lock);
340
341 return dd;
342}
343
Mark A. Greerebedbf72013-01-08 11:57:42 -0700344static void omap_aes_dma_out_callback(void *data)
345{
346 struct omap_aes_dev *dd = data;
347
348 /* dma_lch_out - completed */
349 tasklet_schedule(&dd->done_task);
350}
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800351
352static int omap_aes_dma_init(struct omap_aes_dev *dd)
353{
354 int err = -ENOMEM;
Mark A. Greerebedbf72013-01-08 11:57:42 -0700355 dma_cap_mask_t mask;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800356
Mark A. Greerebedbf72013-01-08 11:57:42 -0700357 dd->dma_lch_out = NULL;
358 dd->dma_lch_in = NULL;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800359
Mark A. Greerebedbf72013-01-08 11:57:42 -0700360 dma_cap_zero(mask);
361 dma_cap_set(DMA_SLAVE, mask);
362
Mark A. Greerb4b87a92013-01-08 11:57:45 -0700363 dd->dma_lch_in = dma_request_slave_channel_compat(mask,
364 omap_dma_filter_fn,
365 &dd->dma_in,
366 dd->dev, "rx");
Mark A. Greerebedbf72013-01-08 11:57:42 -0700367 if (!dd->dma_lch_in) {
368 dev_err(dd->dev, "Unable to request in DMA channel\n");
369 goto err_dma_in;
370 }
371
Mark A. Greerb4b87a92013-01-08 11:57:45 -0700372 dd->dma_lch_out = dma_request_slave_channel_compat(mask,
373 omap_dma_filter_fn,
374 &dd->dma_out,
375 dd->dev, "tx");
Mark A. Greerebedbf72013-01-08 11:57:42 -0700376 if (!dd->dma_lch_out) {
377 dev_err(dd->dev, "Unable to request out DMA channel\n");
378 goto err_dma_out;
379 }
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800380
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800381 return 0;
382
383err_dma_out:
Mark A. Greerebedbf72013-01-08 11:57:42 -0700384 dma_release_channel(dd->dma_lch_in);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800385err_dma_in:
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800386 if (err)
387 pr_err("error: %d\n", err);
388 return err;
389}
390
391static void omap_aes_dma_cleanup(struct omap_aes_dev *dd)
392{
Mark A. Greerebedbf72013-01-08 11:57:42 -0700393 dma_release_channel(dd->dma_lch_out);
394 dma_release_channel(dd->dma_lch_in);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800395}
396
397static void sg_copy_buf(void *buf, struct scatterlist *sg,
398 unsigned int start, unsigned int nbytes, int out)
399{
400 struct scatter_walk walk;
401
402 if (!nbytes)
403 return;
404
405 scatterwalk_start(&walk, sg);
406 scatterwalk_advance(&walk, start);
407 scatterwalk_copychunks(buf, &walk, nbytes, out);
408 scatterwalk_done(&walk, out, 0);
409}
410
Mark A. Greerebedbf72013-01-08 11:57:42 -0700411static int omap_aes_crypt_dma(struct crypto_tfm *tfm,
Joel Fernandes4b645c92013-08-17 21:42:25 -0500412 struct scatterlist *in_sg, struct scatterlist *out_sg,
413 int in_sg_len, int out_sg_len)
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800414{
415 struct omap_aes_ctx *ctx = crypto_tfm_ctx(tfm);
416 struct omap_aes_dev *dd = ctx->dd;
Mark A. Greerebedbf72013-01-08 11:57:42 -0700417 struct dma_async_tx_descriptor *tx_in, *tx_out;
418 struct dma_slave_config cfg;
Joel Fernandes4b645c92013-08-17 21:42:25 -0500419 int ret;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800420
Joel Fernandes98837ab2013-08-17 21:42:30 -0500421 if (dd->pio_only) {
422 scatterwalk_start(&dd->in_walk, dd->in_sg);
423 scatterwalk_start(&dd->out_walk, dd->out_sg);
424
425 /* Enable DATAIN interrupt and let it take
426 care of the rest */
427 omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x2);
428 return 0;
429 }
430
Joel Fernandes0a641712013-08-17 21:42:26 -0500431 dma_sync_sg_for_device(dd->dev, dd->in_sg, in_sg_len, DMA_TO_DEVICE);
432
Mark A. Greerebedbf72013-01-08 11:57:42 -0700433 memset(&cfg, 0, sizeof(cfg));
434
Mark A. Greer0d355832013-01-08 11:57:46 -0700435 cfg.src_addr = dd->phys_base + AES_REG_DATA_N(dd, 0);
436 cfg.dst_addr = dd->phys_base + AES_REG_DATA_N(dd, 0);
Mark A. Greerebedbf72013-01-08 11:57:42 -0700437 cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
438 cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
439 cfg.src_maxburst = DST_MAXBURST;
440 cfg.dst_maxburst = DST_MAXBURST;
441
442 /* IN */
443 ret = dmaengine_slave_config(dd->dma_lch_in, &cfg);
444 if (ret) {
445 dev_err(dd->dev, "can't configure IN dmaengine slave: %d\n",
446 ret);
447 return ret;
448 }
449
Joel Fernandes4b645c92013-08-17 21:42:25 -0500450 tx_in = dmaengine_prep_slave_sg(dd->dma_lch_in, in_sg, in_sg_len,
Mark A. Greerebedbf72013-01-08 11:57:42 -0700451 DMA_MEM_TO_DEV,
452 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
453 if (!tx_in) {
454 dev_err(dd->dev, "IN prep_slave_sg() failed\n");
455 return -EINVAL;
456 }
457
458 /* No callback necessary */
459 tx_in->callback_param = dd;
460
461 /* OUT */
462 ret = dmaengine_slave_config(dd->dma_lch_out, &cfg);
463 if (ret) {
464 dev_err(dd->dev, "can't configure OUT dmaengine slave: %d\n",
465 ret);
466 return ret;
467 }
468
Joel Fernandes4b645c92013-08-17 21:42:25 -0500469 tx_out = dmaengine_prep_slave_sg(dd->dma_lch_out, out_sg, out_sg_len,
Mark A. Greerebedbf72013-01-08 11:57:42 -0700470 DMA_DEV_TO_MEM,
471 DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
472 if (!tx_out) {
473 dev_err(dd->dev, "OUT prep_slave_sg() failed\n");
474 return -EINVAL;
475 }
476
477 tx_out->callback = omap_aes_dma_out_callback;
478 tx_out->callback_param = dd;
479
480 dmaengine_submit(tx_in);
481 dmaengine_submit(tx_out);
482
483 dma_async_issue_pending(dd->dma_lch_in);
484 dma_async_issue_pending(dd->dma_lch_out);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800485
Mark A. Greer0d355832013-01-08 11:57:46 -0700486 /* start DMA */
Joel Fernandes4b645c92013-08-17 21:42:25 -0500487 dd->pdata->trigger(dd, dd->total);
Dmitry Kasatkin83ea7e02010-11-30 10:13:31 +0200488
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800489 return 0;
490}
491
492static int omap_aes_crypt_dma_start(struct omap_aes_dev *dd)
493{
494 struct crypto_tfm *tfm = crypto_ablkcipher_tfm(
495 crypto_ablkcipher_reqtfm(dd->req));
Joel Fernandes4b645c92013-08-17 21:42:25 -0500496 int err;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800497
498 pr_debug("total: %d\n", dd->total);
499
Joel Fernandes98837ab2013-08-17 21:42:30 -0500500 if (!dd->pio_only) {
501 err = dma_map_sg(dd->dev, dd->in_sg, dd->in_sg_len,
502 DMA_TO_DEVICE);
503 if (!err) {
504 dev_err(dd->dev, "dma_map_sg() error\n");
505 return -EINVAL;
506 }
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800507
Joel Fernandes98837ab2013-08-17 21:42:30 -0500508 err = dma_map_sg(dd->dev, dd->out_sg, dd->out_sg_len,
509 DMA_FROM_DEVICE);
510 if (!err) {
511 dev_err(dd->dev, "dma_map_sg() error\n");
512 return -EINVAL;
513 }
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800514 }
515
Joel Fernandes4b645c92013-08-17 21:42:25 -0500516 err = omap_aes_crypt_dma(tfm, dd->in_sg, dd->out_sg, dd->in_sg_len,
517 dd->out_sg_len);
Joel Fernandes98837ab2013-08-17 21:42:30 -0500518 if (err && !dd->pio_only) {
Joel Fernandes4b645c92013-08-17 21:42:25 -0500519 dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE);
520 dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len,
521 DMA_FROM_DEVICE);
Dmitry Kasatkin21fe9762010-11-30 10:13:29 +0200522 }
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800523
524 return err;
525}
526
527static void omap_aes_finish_req(struct omap_aes_dev *dd, int err)
528{
Dmitry Kasatkin21fe9762010-11-30 10:13:29 +0200529 struct ablkcipher_request *req = dd->req;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800530
531 pr_debug("err: %d\n", err);
532
Baolin Wang05299002016-01-26 20:25:40 +0800533 crypto_finalize_request(dd->engine, req, err);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800534}
535
536static int omap_aes_crypt_dma_stop(struct omap_aes_dev *dd)
537{
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800538 pr_debug("total: %d\n", dd->total);
539
Mark A. Greer0d355832013-01-08 11:57:46 -0700540 omap_aes_dma_stop(dd);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800541
Mark A. Greerebedbf72013-01-08 11:57:42 -0700542 dmaengine_terminate_all(dd->dma_lch_in);
543 dmaengine_terminate_all(dd->dma_lch_out);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800544
Rahul Pathak16f080a2015-12-14 08:45:23 +0000545 return 0;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800546}
547
Vutla, Lokesh6d7e7e02015-03-31 09:52:25 +0530548static int omap_aes_check_aligned(struct scatterlist *sg, int total)
Joel Fernandes62423322013-08-17 21:42:32 -0500549{
Vutla, Lokesh6d7e7e02015-03-31 09:52:25 +0530550 int len = 0;
551
Vutla, Lokesh310b0d52015-07-07 21:01:43 +0530552 if (!IS_ALIGNED(total, AES_BLOCK_SIZE))
553 return -EINVAL;
554
Joel Fernandes62423322013-08-17 21:42:32 -0500555 while (sg) {
556 if (!IS_ALIGNED(sg->offset, 4))
557 return -1;
558 if (!IS_ALIGNED(sg->length, AES_BLOCK_SIZE))
559 return -1;
Vutla, Lokesh6d7e7e02015-03-31 09:52:25 +0530560
561 len += sg->length;
Joel Fernandes62423322013-08-17 21:42:32 -0500562 sg = sg_next(sg);
563 }
Vutla, Lokesh6d7e7e02015-03-31 09:52:25 +0530564
565 if (len != total)
566 return -1;
567
Joel Fernandes62423322013-08-17 21:42:32 -0500568 return 0;
569}
570
Sachin Kamat034568e2013-09-13 17:06:46 +0530571static int omap_aes_copy_sgs(struct omap_aes_dev *dd)
Joel Fernandes62423322013-08-17 21:42:32 -0500572{
573 void *buf_in, *buf_out;
Vutla, Lokesh310b0d52015-07-07 21:01:43 +0530574 int pages, total;
Joel Fernandes62423322013-08-17 21:42:32 -0500575
Vutla, Lokesh310b0d52015-07-07 21:01:43 +0530576 total = ALIGN(dd->total, AES_BLOCK_SIZE);
577 pages = get_order(total);
Joel Fernandes62423322013-08-17 21:42:32 -0500578
579 buf_in = (void *)__get_free_pages(GFP_ATOMIC, pages);
580 buf_out = (void *)__get_free_pages(GFP_ATOMIC, pages);
581
582 if (!buf_in || !buf_out) {
583 pr_err("Couldn't allocated pages for unaligned cases.\n");
584 return -1;
585 }
586
587 dd->orig_out = dd->out_sg;
588
589 sg_copy_buf(buf_in, dd->in_sg, 0, dd->total, 0);
590
591 sg_init_table(&dd->in_sgl, 1);
Vutla, Lokesh310b0d52015-07-07 21:01:43 +0530592 sg_set_buf(&dd->in_sgl, buf_in, total);
Joel Fernandes62423322013-08-17 21:42:32 -0500593 dd->in_sg = &dd->in_sgl;
594
595 sg_init_table(&dd->out_sgl, 1);
Vutla, Lokesh310b0d52015-07-07 21:01:43 +0530596 sg_set_buf(&dd->out_sgl, buf_out, total);
Joel Fernandes62423322013-08-17 21:42:32 -0500597 dd->out_sg = &dd->out_sgl;
598
599 return 0;
600}
601
Dmitry Kasatkin21fe9762010-11-30 10:13:29 +0200602static int omap_aes_handle_queue(struct omap_aes_dev *dd,
Baolin Wang05299002016-01-26 20:25:40 +0800603 struct ablkcipher_request *req)
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800604{
Dmitry Kasatkineeb2b202010-11-30 10:13:28 +0200605 if (req)
Baolin Wang05299002016-01-26 20:25:40 +0800606 return crypto_transfer_request_to_engine(dd->engine, req);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800607
Baolin Wang05299002016-01-26 20:25:40 +0800608 return 0;
609}
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800610
Baolin Wang05299002016-01-26 20:25:40 +0800611static int omap_aes_prepare_req(struct crypto_engine *engine,
612 struct ablkcipher_request *req)
613{
614 struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx(
615 crypto_ablkcipher_reqtfm(req));
616 struct omap_aes_dev *dd = omap_aes_find_dev(ctx);
617 struct omap_aes_reqctx *rctx;
618 int len;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800619
Baolin Wang05299002016-01-26 20:25:40 +0800620 if (!dd)
621 return -ENODEV;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800622
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800623 /* assign new request to device */
624 dd->req = req;
625 dd->total = req->nbytes;
Joel Fernandes62423322013-08-17 21:42:32 -0500626 dd->total_save = req->nbytes;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800627 dd->in_sg = req->src;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800628 dd->out_sg = req->dst;
629
Vutla, Lokesh6d7e7e02015-03-31 09:52:25 +0530630 if (omap_aes_check_aligned(dd->in_sg, dd->total) ||
631 omap_aes_check_aligned(dd->out_sg, dd->total)) {
Joel Fernandes62423322013-08-17 21:42:32 -0500632 if (omap_aes_copy_sgs(dd))
633 pr_err("Failed to copy SGs for unaligned cases\n");
634 dd->sgs_copied = 1;
635 } else {
636 dd->sgs_copied = 0;
637 }
638
Vutla, Lokesh310b0d52015-07-07 21:01:43 +0530639 len = ALIGN(dd->total, AES_BLOCK_SIZE);
640 dd->in_sg_len = scatterwalk_bytes_sglen(dd->in_sg, len);
641 dd->out_sg_len = scatterwalk_bytes_sglen(dd->out_sg, len);
Joel Fernandese77c7562013-08-17 21:42:24 -0500642 BUG_ON(dd->in_sg_len < 0 || dd->out_sg_len < 0);
643
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800644 rctx = ablkcipher_request_ctx(req);
645 ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req));
646 rctx->mode &= FLAGS_MODE_MASK;
647 dd->flags = (dd->flags & ~FLAGS_MODE_MASK) | rctx->mode;
648
Dmitry Kasatkin67a730c2010-11-30 10:13:30 +0200649 dd->ctx = ctx;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800650 ctx->dd = dd;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800651
Baolin Wang05299002016-01-26 20:25:40 +0800652 return omap_aes_write_ctrl(dd);
653}
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800654
Baolin Wang05299002016-01-26 20:25:40 +0800655static int omap_aes_crypt_req(struct crypto_engine *engine,
656 struct ablkcipher_request *req)
657{
658 struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx(
659 crypto_ablkcipher_reqtfm(req));
660 struct omap_aes_dev *dd = omap_aes_find_dev(ctx);
661
662 if (!dd)
663 return -ENODEV;
664
665 return omap_aes_crypt_dma_start(dd);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800666}
667
Dmitry Kasatkin21fe9762010-11-30 10:13:29 +0200668static void omap_aes_done_task(unsigned long data)
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800669{
670 struct omap_aes_dev *dd = (struct omap_aes_dev *)data;
Joel Fernandes62423322013-08-17 21:42:32 -0500671 void *buf_in, *buf_out;
Vutla, Lokesh310b0d52015-07-07 21:01:43 +0530672 int pages, len;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800673
Joel Fernandes4b645c92013-08-17 21:42:25 -0500674 pr_debug("enter done_task\n");
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800675
Joel Fernandes98837ab2013-08-17 21:42:30 -0500676 if (!dd->pio_only) {
677 dma_sync_sg_for_device(dd->dev, dd->out_sg, dd->out_sg_len,
678 DMA_FROM_DEVICE);
Joel Fernandes62423322013-08-17 21:42:32 -0500679 dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE);
680 dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len,
681 DMA_FROM_DEVICE);
Joel Fernandes98837ab2013-08-17 21:42:30 -0500682 omap_aes_crypt_dma_stop(dd);
683 }
Joel Fernandes62423322013-08-17 21:42:32 -0500684
685 if (dd->sgs_copied) {
686 buf_in = sg_virt(&dd->in_sgl);
687 buf_out = sg_virt(&dd->out_sgl);
688
689 sg_copy_buf(buf_out, dd->orig_out, 0, dd->total_save, 1);
690
Vutla, Lokesh310b0d52015-07-07 21:01:43 +0530691 len = ALIGN(dd->total_save, AES_BLOCK_SIZE);
692 pages = get_order(len);
Joel Fernandes62423322013-08-17 21:42:32 -0500693 free_pages((unsigned long)buf_in, pages);
694 free_pages((unsigned long)buf_out, pages);
695 }
696
Joel Fernandes4b645c92013-08-17 21:42:25 -0500697 omap_aes_finish_req(dd, 0);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800698
699 pr_debug("exit\n");
700}
701
702static int omap_aes_crypt(struct ablkcipher_request *req, unsigned long mode)
703{
704 struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx(
705 crypto_ablkcipher_reqtfm(req));
706 struct omap_aes_reqctx *rctx = ablkcipher_request_ctx(req);
707 struct omap_aes_dev *dd;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800708
709 pr_debug("nbytes: %d, enc: %d, cbc: %d\n", req->nbytes,
710 !!(mode & FLAGS_ENCRYPT),
711 !!(mode & FLAGS_CBC));
712
713 dd = omap_aes_find_dev(ctx);
714 if (!dd)
715 return -ENODEV;
716
717 rctx->mode = mode;
718
Dmitry Kasatkin21fe9762010-11-30 10:13:29 +0200719 return omap_aes_handle_queue(dd, req);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800720}
721
722/* ********************** ALG API ************************************ */
723
724static int omap_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
725 unsigned int keylen)
726{
727 struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm);
728
729 if (keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_192 &&
730 keylen != AES_KEYSIZE_256)
731 return -EINVAL;
732
733 pr_debug("enter, keylen: %d\n", keylen);
734
735 memcpy(ctx->key, key, keylen);
736 ctx->keylen = keylen;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800737
738 return 0;
739}
740
741static int omap_aes_ecb_encrypt(struct ablkcipher_request *req)
742{
743 return omap_aes_crypt(req, FLAGS_ENCRYPT);
744}
745
746static int omap_aes_ecb_decrypt(struct ablkcipher_request *req)
747{
748 return omap_aes_crypt(req, 0);
749}
750
751static int omap_aes_cbc_encrypt(struct ablkcipher_request *req)
752{
753 return omap_aes_crypt(req, FLAGS_ENCRYPT | FLAGS_CBC);
754}
755
756static int omap_aes_cbc_decrypt(struct ablkcipher_request *req)
757{
758 return omap_aes_crypt(req, FLAGS_CBC);
759}
760
Mark A. Greerf9fb69e2013-01-08 11:57:47 -0700761static int omap_aes_ctr_encrypt(struct ablkcipher_request *req)
762{
763 return omap_aes_crypt(req, FLAGS_ENCRYPT | FLAGS_CTR);
764}
765
766static int omap_aes_ctr_decrypt(struct ablkcipher_request *req)
767{
768 return omap_aes_crypt(req, FLAGS_CTR);
769}
770
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800771static int omap_aes_cra_init(struct crypto_tfm *tfm)
772{
Joel A Fernandesa3485e62013-05-28 19:02:55 -0500773 struct omap_aes_dev *dd = NULL;
Nishanth Menonf7b2b5d2013-12-03 19:43:13 -0600774 int err;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800775
Joel A Fernandesa3485e62013-05-28 19:02:55 -0500776 /* Find AES device, currently picks the first device */
777 spin_lock_bh(&list_lock);
778 list_for_each_entry(dd, &dev_list, list) {
779 break;
780 }
781 spin_unlock_bh(&list_lock);
782
Nishanth Menonf7b2b5d2013-12-03 19:43:13 -0600783 err = pm_runtime_get_sync(dd->dev);
784 if (err < 0) {
785 dev_err(dd->dev, "%s: failed to get_sync(%d)\n",
786 __func__, err);
787 return err;
788 }
789
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800790 tfm->crt_ablkcipher.reqsize = sizeof(struct omap_aes_reqctx);
791
792 return 0;
793}
794
795static void omap_aes_cra_exit(struct crypto_tfm *tfm)
796{
Joel A Fernandesa3485e62013-05-28 19:02:55 -0500797 struct omap_aes_dev *dd = NULL;
798
799 /* Find AES device, currently picks the first device */
800 spin_lock_bh(&list_lock);
801 list_for_each_entry(dd, &dev_list, list) {
802 break;
803 }
804 spin_unlock_bh(&list_lock);
805
806 pm_runtime_put_sync(dd->dev);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800807}
808
809/* ********************** ALGS ************************************ */
810
Mark A. Greerf9fb69e2013-01-08 11:57:47 -0700811static struct crypto_alg algs_ecb_cbc[] = {
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800812{
813 .cra_name = "ecb(aes)",
814 .cra_driver_name = "ecb-aes-omap",
Vutla, Lokesh6e2e3d12015-07-07 21:01:44 +0530815 .cra_priority = 300,
Nikos Mavrogiannopoulosd912bb72011-11-01 13:39:56 +0100816 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
817 CRYPTO_ALG_KERN_DRIVER_ONLY |
818 CRYPTO_ALG_ASYNC,
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800819 .cra_blocksize = AES_BLOCK_SIZE,
820 .cra_ctxsize = sizeof(struct omap_aes_ctx),
Dmitry Kasatkinefce41b2010-11-30 10:13:32 +0200821 .cra_alignmask = 0,
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800822 .cra_type = &crypto_ablkcipher_type,
823 .cra_module = THIS_MODULE,
824 .cra_init = omap_aes_cra_init,
825 .cra_exit = omap_aes_cra_exit,
826 .cra_u.ablkcipher = {
827 .min_keysize = AES_MIN_KEY_SIZE,
828 .max_keysize = AES_MAX_KEY_SIZE,
829 .setkey = omap_aes_setkey,
830 .encrypt = omap_aes_ecb_encrypt,
831 .decrypt = omap_aes_ecb_decrypt,
832 }
833},
834{
835 .cra_name = "cbc(aes)",
836 .cra_driver_name = "cbc-aes-omap",
Vutla, Lokesh6e2e3d12015-07-07 21:01:44 +0530837 .cra_priority = 300,
Nikos Mavrogiannopoulosd912bb72011-11-01 13:39:56 +0100838 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
839 CRYPTO_ALG_KERN_DRIVER_ONLY |
840 CRYPTO_ALG_ASYNC,
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800841 .cra_blocksize = AES_BLOCK_SIZE,
842 .cra_ctxsize = sizeof(struct omap_aes_ctx),
Dmitry Kasatkinefce41b2010-11-30 10:13:32 +0200843 .cra_alignmask = 0,
Dmitry Kasatkin537559a2010-09-03 19:16:02 +0800844 .cra_type = &crypto_ablkcipher_type,
845 .cra_module = THIS_MODULE,
846 .cra_init = omap_aes_cra_init,
847 .cra_exit = omap_aes_cra_exit,
848 .cra_u.ablkcipher = {
849 .min_keysize = AES_MIN_KEY_SIZE,
850 .max_keysize = AES_MAX_KEY_SIZE,
851 .ivsize = AES_BLOCK_SIZE,
852 .setkey = omap_aes_setkey,
853 .encrypt = omap_aes_cbc_encrypt,
854 .decrypt = omap_aes_cbc_decrypt,
855 }
856}
857};
858
Mark A. Greerf9fb69e2013-01-08 11:57:47 -0700859static struct crypto_alg algs_ctr[] = {
860{
861 .cra_name = "ctr(aes)",
862 .cra_driver_name = "ctr-aes-omap",
Vutla, Lokesh6e2e3d12015-07-07 21:01:44 +0530863 .cra_priority = 300,
Mark A. Greerf9fb69e2013-01-08 11:57:47 -0700864 .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
865 CRYPTO_ALG_KERN_DRIVER_ONLY |
866 CRYPTO_ALG_ASYNC,
867 .cra_blocksize = AES_BLOCK_SIZE,
868 .cra_ctxsize = sizeof(struct omap_aes_ctx),
869 .cra_alignmask = 0,
870 .cra_type = &crypto_ablkcipher_type,
871 .cra_module = THIS_MODULE,
872 .cra_init = omap_aes_cra_init,
873 .cra_exit = omap_aes_cra_exit,
874 .cra_u.ablkcipher = {
875 .min_keysize = AES_MIN_KEY_SIZE,
876 .max_keysize = AES_MAX_KEY_SIZE,
877 .geniv = "eseqiv",
878 .ivsize = AES_BLOCK_SIZE,
879 .setkey = omap_aes_setkey,
880 .encrypt = omap_aes_ctr_encrypt,
881 .decrypt = omap_aes_ctr_decrypt,
882 }
883} ,
884};
885
886static struct omap_aes_algs_info omap_aes_algs_info_ecb_cbc[] = {
887 {
888 .algs_list = algs_ecb_cbc,
889 .size = ARRAY_SIZE(algs_ecb_cbc),
890 },
891};
892
Mark A. Greer0d355832013-01-08 11:57:46 -0700893static const struct omap_aes_pdata omap_aes_pdata_omap2 = {
Mark A. Greerf9fb69e2013-01-08 11:57:47 -0700894 .algs_info = omap_aes_algs_info_ecb_cbc,
895 .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc),
Mark A. Greer0d355832013-01-08 11:57:46 -0700896 .trigger = omap_aes_dma_trigger_omap2,
897 .key_ofs = 0x1c,
898 .iv_ofs = 0x20,
899 .ctrl_ofs = 0x30,
900 .data_ofs = 0x34,
901 .rev_ofs = 0x44,
902 .mask_ofs = 0x48,
903 .dma_enable_in = BIT(2),
904 .dma_enable_out = BIT(3),
905 .dma_start = BIT(5),
906 .major_mask = 0xf0,
907 .major_shift = 4,
908 .minor_mask = 0x0f,
909 .minor_shift = 0,
910};
911
Mark A. Greerbc69d122013-01-08 11:57:44 -0700912#ifdef CONFIG_OF
Mark A. Greerf9fb69e2013-01-08 11:57:47 -0700913static struct omap_aes_algs_info omap_aes_algs_info_ecb_cbc_ctr[] = {
914 {
915 .algs_list = algs_ecb_cbc,
916 .size = ARRAY_SIZE(algs_ecb_cbc),
917 },
918 {
919 .algs_list = algs_ctr,
920 .size = ARRAY_SIZE(algs_ctr),
921 },
922};
923
924static const struct omap_aes_pdata omap_aes_pdata_omap3 = {
925 .algs_info = omap_aes_algs_info_ecb_cbc_ctr,
926 .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc_ctr),
927 .trigger = omap_aes_dma_trigger_omap2,
928 .key_ofs = 0x1c,
929 .iv_ofs = 0x20,
930 .ctrl_ofs = 0x30,
931 .data_ofs = 0x34,
932 .rev_ofs = 0x44,
933 .mask_ofs = 0x48,
934 .dma_enable_in = BIT(2),
935 .dma_enable_out = BIT(3),
936 .dma_start = BIT(5),
937 .major_mask = 0xf0,
938 .major_shift = 4,
939 .minor_mask = 0x0f,
940 .minor_shift = 0,
941};
942
Mark A. Greer0d355832013-01-08 11:57:46 -0700943static const struct omap_aes_pdata omap_aes_pdata_omap4 = {
Mark A. Greerf9fb69e2013-01-08 11:57:47 -0700944 .algs_info = omap_aes_algs_info_ecb_cbc_ctr,
945 .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc_ctr),
Mark A. Greer0d355832013-01-08 11:57:46 -0700946 .trigger = omap_aes_dma_trigger_omap4,
947 .key_ofs = 0x3c,
948 .iv_ofs = 0x40,
949 .ctrl_ofs = 0x50,
950 .data_ofs = 0x60,
951 .rev_ofs = 0x80,
952 .mask_ofs = 0x84,
Joel Fernandes67216752013-08-17 21:42:28 -0500953 .irq_status_ofs = 0x8c,
954 .irq_enable_ofs = 0x90,
Mark A. Greer0d355832013-01-08 11:57:46 -0700955 .dma_enable_in = BIT(5),
956 .dma_enable_out = BIT(6),
957 .major_mask = 0x0700,
958 .major_shift = 8,
959 .minor_mask = 0x003f,
960 .minor_shift = 0,
961};
962
Joel Fernandes1bf95cc2013-08-17 21:42:29 -0500963static irqreturn_t omap_aes_irq(int irq, void *dev_id)
964{
965 struct omap_aes_dev *dd = dev_id;
966 u32 status, i;
967 u32 *src, *dst;
968
969 status = omap_aes_read(dd, AES_REG_IRQ_STATUS(dd));
970 if (status & AES_REG_IRQ_DATA_IN) {
971 omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x0);
972
973 BUG_ON(!dd->in_sg);
974
975 BUG_ON(_calc_walked(in) > dd->in_sg->length);
976
977 src = sg_virt(dd->in_sg) + _calc_walked(in);
978
979 for (i = 0; i < AES_BLOCK_WORDS; i++) {
980 omap_aes_write(dd, AES_REG_DATA_N(dd, i), *src);
981
982 scatterwalk_advance(&dd->in_walk, 4);
983 if (dd->in_sg->length == _calc_walked(in)) {
Cristian Stoica5be4d4c2015-01-20 10:06:16 +0200984 dd->in_sg = sg_next(dd->in_sg);
Joel Fernandes1bf95cc2013-08-17 21:42:29 -0500985 if (dd->in_sg) {
986 scatterwalk_start(&dd->in_walk,
987 dd->in_sg);
988 src = sg_virt(dd->in_sg) +
989 _calc_walked(in);
990 }
991 } else {
992 src++;
993 }
994 }
995
996 /* Clear IRQ status */
997 status &= ~AES_REG_IRQ_DATA_IN;
998 omap_aes_write(dd, AES_REG_IRQ_STATUS(dd), status);
999
1000 /* Enable DATA_OUT interrupt */
1001 omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x4);
1002
1003 } else if (status & AES_REG_IRQ_DATA_OUT) {
1004 omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x0);
1005
1006 BUG_ON(!dd->out_sg);
1007
1008 BUG_ON(_calc_walked(out) > dd->out_sg->length);
1009
1010 dst = sg_virt(dd->out_sg) + _calc_walked(out);
1011
1012 for (i = 0; i < AES_BLOCK_WORDS; i++) {
1013 *dst = omap_aes_read(dd, AES_REG_DATA_N(dd, i));
1014 scatterwalk_advance(&dd->out_walk, 4);
1015 if (dd->out_sg->length == _calc_walked(out)) {
Cristian Stoica5be4d4c2015-01-20 10:06:16 +02001016 dd->out_sg = sg_next(dd->out_sg);
Joel Fernandes1bf95cc2013-08-17 21:42:29 -05001017 if (dd->out_sg) {
1018 scatterwalk_start(&dd->out_walk,
1019 dd->out_sg);
1020 dst = sg_virt(dd->out_sg) +
1021 _calc_walked(out);
1022 }
1023 } else {
1024 dst++;
1025 }
1026 }
1027
Vutla, Lokesh310b0d52015-07-07 21:01:43 +05301028 dd->total -= min_t(size_t, AES_BLOCK_SIZE, dd->total);
Joel Fernandes1bf95cc2013-08-17 21:42:29 -05001029
1030 /* Clear IRQ status */
1031 status &= ~AES_REG_IRQ_DATA_OUT;
1032 omap_aes_write(dd, AES_REG_IRQ_STATUS(dd), status);
1033
1034 if (!dd->total)
1035 /* All bytes read! */
1036 tasklet_schedule(&dd->done_task);
1037 else
1038 /* Enable DATA_IN interrupt for next block */
1039 omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x2);
1040 }
1041
1042 return IRQ_HANDLED;
1043}
1044
Mark A. Greerbc69d122013-01-08 11:57:44 -07001045static const struct of_device_id omap_aes_of_match[] = {
1046 {
1047 .compatible = "ti,omap2-aes",
Mark A. Greer0d355832013-01-08 11:57:46 -07001048 .data = &omap_aes_pdata_omap2,
1049 },
1050 {
Mark A. Greerf9fb69e2013-01-08 11:57:47 -07001051 .compatible = "ti,omap3-aes",
1052 .data = &omap_aes_pdata_omap3,
1053 },
1054 {
Mark A. Greer0d355832013-01-08 11:57:46 -07001055 .compatible = "ti,omap4-aes",
1056 .data = &omap_aes_pdata_omap4,
Mark A. Greerbc69d122013-01-08 11:57:44 -07001057 },
1058 {},
1059};
1060MODULE_DEVICE_TABLE(of, omap_aes_of_match);
1061
1062static int omap_aes_get_res_of(struct omap_aes_dev *dd,
1063 struct device *dev, struct resource *res)
1064{
1065 struct device_node *node = dev->of_node;
1066 const struct of_device_id *match;
1067 int err = 0;
1068
1069 match = of_match_device(of_match_ptr(omap_aes_of_match), dev);
1070 if (!match) {
1071 dev_err(dev, "no compatible OF match\n");
1072 err = -EINVAL;
1073 goto err;
1074 }
1075
1076 err = of_address_to_resource(node, 0, res);
1077 if (err < 0) {
1078 dev_err(dev, "can't translate OF node address\n");
1079 err = -EINVAL;
1080 goto err;
1081 }
1082
1083 dd->dma_out = -1; /* Dummy value that's unused */
1084 dd->dma_in = -1; /* Dummy value that's unused */
1085
Mark A. Greer0d355832013-01-08 11:57:46 -07001086 dd->pdata = match->data;
1087
Mark A. Greerbc69d122013-01-08 11:57:44 -07001088err:
1089 return err;
1090}
1091#else
1092static const struct of_device_id omap_aes_of_match[] = {
1093 {},
1094};
1095
1096static int omap_aes_get_res_of(struct omap_aes_dev *dd,
1097 struct device *dev, struct resource *res)
1098{
1099 return -EINVAL;
1100}
1101#endif
1102
1103static int omap_aes_get_res_pdev(struct omap_aes_dev *dd,
1104 struct platform_device *pdev, struct resource *res)
1105{
1106 struct device *dev = &pdev->dev;
1107 struct resource *r;
1108 int err = 0;
1109
1110 /* Get the base address */
1111 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1112 if (!r) {
1113 dev_err(dev, "no MEM resource info\n");
1114 err = -ENODEV;
1115 goto err;
1116 }
1117 memcpy(res, r, sizeof(*res));
1118
1119 /* Get the DMA out channel */
1120 r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1121 if (!r) {
1122 dev_err(dev, "no DMA out resource info\n");
1123 err = -ENODEV;
1124 goto err;
1125 }
1126 dd->dma_out = r->start;
1127
1128 /* Get the DMA in channel */
1129 r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1130 if (!r) {
1131 dev_err(dev, "no DMA in resource info\n");
1132 err = -ENODEV;
1133 goto err;
1134 }
1135 dd->dma_in = r->start;
1136
Mark A. Greer0d355832013-01-08 11:57:46 -07001137 /* Only OMAP2/3 can be non-DT */
1138 dd->pdata = &omap_aes_pdata_omap2;
1139
Mark A. Greerbc69d122013-01-08 11:57:44 -07001140err:
1141 return err;
1142}
1143
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001144static int omap_aes_probe(struct platform_device *pdev)
1145{
1146 struct device *dev = &pdev->dev;
1147 struct omap_aes_dev *dd;
Mark A. Greerf9fb69e2013-01-08 11:57:47 -07001148 struct crypto_alg *algp;
Mark A. Greerbc69d122013-01-08 11:57:44 -07001149 struct resource res;
Joel Fernandes1801ad92013-08-17 21:42:31 -05001150 int err = -ENOMEM, i, j, irq = -1;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001151 u32 reg;
1152
Joel Fernandes05007c12013-08-17 21:42:33 -05001153 dd = devm_kzalloc(dev, sizeof(struct omap_aes_dev), GFP_KERNEL);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001154 if (dd == NULL) {
1155 dev_err(dev, "unable to alloc data struct.\n");
1156 goto err_data;
1157 }
1158 dd->dev = dev;
1159 platform_set_drvdata(pdev, dd);
1160
Mark A. Greerbc69d122013-01-08 11:57:44 -07001161 err = (dev->of_node) ? omap_aes_get_res_of(dd, dev, &res) :
1162 omap_aes_get_res_pdev(dd, pdev, &res);
1163 if (err)
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001164 goto err_res;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001165
Laurent Navet30862282013-05-02 14:00:38 +02001166 dd->io_base = devm_ioremap_resource(dev, &res);
1167 if (IS_ERR(dd->io_base)) {
1168 err = PTR_ERR(dd->io_base);
Mark A. Greer5946c4a2013-01-08 11:57:40 -07001169 goto err_res;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001170 }
Mark A. Greerbc69d122013-01-08 11:57:44 -07001171 dd->phys_base = res.start;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001172
Mark A. Greer5946c4a2013-01-08 11:57:40 -07001173 pm_runtime_enable(dev);
Nishanth Menonf7b2b5d2013-12-03 19:43:13 -06001174 err = pm_runtime_get_sync(dev);
1175 if (err < 0) {
1176 dev_err(dev, "%s: failed to get_sync(%d)\n",
1177 __func__, err);
1178 goto err_res;
1179 }
Mark A. Greer5946c4a2013-01-08 11:57:40 -07001180
Mark A. Greer0d355832013-01-08 11:57:46 -07001181 omap_aes_dma_stop(dd);
1182
1183 reg = omap_aes_read(dd, AES_REG_REV(dd));
Mark A. Greer5946c4a2013-01-08 11:57:40 -07001184
1185 pm_runtime_put_sync(dev);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001186
Mark A. Greer0d355832013-01-08 11:57:46 -07001187 dev_info(dev, "OMAP AES hw accel rev: %u.%u\n",
1188 (reg & dd->pdata->major_mask) >> dd->pdata->major_shift,
1189 (reg & dd->pdata->minor_mask) >> dd->pdata->minor_shift);
1190
Dmitry Kasatkin21fe9762010-11-30 10:13:29 +02001191 tasklet_init(&dd->done_task, omap_aes_done_task, (unsigned long)dd);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001192
1193 err = omap_aes_dma_init(dd);
Joel Fernandes1801ad92013-08-17 21:42:31 -05001194 if (err && AES_REG_IRQ_STATUS(dd) && AES_REG_IRQ_ENABLE(dd)) {
1195 dd->pio_only = 1;
1196
1197 irq = platform_get_irq(pdev, 0);
1198 if (irq < 0) {
1199 dev_err(dev, "can't get IRQ resource\n");
1200 goto err_irq;
1201 }
1202
Joel Fernandesbce2a222013-08-17 21:42:34 -05001203 err = devm_request_irq(dev, irq, omap_aes_irq, 0,
Joel Fernandes1801ad92013-08-17 21:42:31 -05001204 dev_name(dev), dd);
1205 if (err) {
1206 dev_err(dev, "Unable to grab omap-aes IRQ\n");
1207 goto err_irq;
1208 }
1209 }
1210
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001211
1212 INIT_LIST_HEAD(&dd->list);
1213 spin_lock(&list_lock);
1214 list_add_tail(&dd->list, &dev_list);
1215 spin_unlock(&list_lock);
1216
Mark A. Greerf9fb69e2013-01-08 11:57:47 -07001217 for (i = 0; i < dd->pdata->algs_info_size; i++) {
1218 for (j = 0; j < dd->pdata->algs_info[i].size; j++) {
1219 algp = &dd->pdata->algs_info[i].algs_list[j];
1220
1221 pr_debug("reg alg: %s\n", algp->cra_name);
1222 INIT_LIST_HEAD(&algp->cra_list);
1223
1224 err = crypto_register_alg(algp);
1225 if (err)
1226 goto err_algs;
1227
1228 dd->pdata->algs_info[i].registered++;
1229 }
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001230 }
1231
Baolin Wang05299002016-01-26 20:25:40 +08001232 /* Initialize crypto engine */
1233 dd->engine = crypto_engine_alloc_init(dev, 1);
1234 if (!dd->engine)
1235 goto err_algs;
1236
1237 dd->engine->prepare_request = omap_aes_prepare_req;
1238 dd->engine->crypt_one_request = omap_aes_crypt_req;
1239 err = crypto_engine_start(dd->engine);
1240 if (err)
1241 goto err_engine;
1242
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001243 return 0;
Baolin Wang05299002016-01-26 20:25:40 +08001244err_engine:
1245 crypto_engine_exit(dd->engine);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001246err_algs:
Mark A. Greerf9fb69e2013-01-08 11:57:47 -07001247 for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
1248 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
1249 crypto_unregister_alg(
1250 &dd->pdata->algs_info[i].algs_list[j]);
Joel Fernandesbce2a222013-08-17 21:42:34 -05001251 if (!dd->pio_only)
Joel Fernandes1801ad92013-08-17 21:42:31 -05001252 omap_aes_dma_cleanup(dd);
1253err_irq:
Dmitry Kasatkin21fe9762010-11-30 10:13:29 +02001254 tasklet_kill(&dd->done_task);
Mark A. Greer5946c4a2013-01-08 11:57:40 -07001255 pm_runtime_disable(dev);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001256err_res:
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001257 dd = NULL;
1258err_data:
1259 dev_err(dev, "initialization failed.\n");
1260 return err;
1261}
1262
1263static int omap_aes_remove(struct platform_device *pdev)
1264{
1265 struct omap_aes_dev *dd = platform_get_drvdata(pdev);
Mark A. Greerf9fb69e2013-01-08 11:57:47 -07001266 int i, j;
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001267
1268 if (!dd)
1269 return -ENODEV;
1270
1271 spin_lock(&list_lock);
1272 list_del(&dd->list);
1273 spin_unlock(&list_lock);
1274
Mark A. Greerf9fb69e2013-01-08 11:57:47 -07001275 for (i = dd->pdata->algs_info_size - 1; i >= 0; i--)
1276 for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--)
1277 crypto_unregister_alg(
1278 &dd->pdata->algs_info[i].algs_list[j]);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001279
Baolin Wang05299002016-01-26 20:25:40 +08001280 crypto_engine_exit(dd->engine);
Dmitry Kasatkin21fe9762010-11-30 10:13:29 +02001281 tasklet_kill(&dd->done_task);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001282 omap_aes_dma_cleanup(dd);
Mark A. Greer5946c4a2013-01-08 11:57:40 -07001283 pm_runtime_disable(dd->dev);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001284 dd = NULL;
1285
1286 return 0;
1287}
1288
Mark A. Greer0635fb32013-01-08 11:57:41 -07001289#ifdef CONFIG_PM_SLEEP
1290static int omap_aes_suspend(struct device *dev)
1291{
1292 pm_runtime_put_sync(dev);
1293 return 0;
1294}
1295
1296static int omap_aes_resume(struct device *dev)
1297{
1298 pm_runtime_get_sync(dev);
1299 return 0;
1300}
1301#endif
1302
Jingoo Hanea7b2842014-02-27 20:31:38 +09001303static SIMPLE_DEV_PM_OPS(omap_aes_pm_ops, omap_aes_suspend, omap_aes_resume);
Mark A. Greer0635fb32013-01-08 11:57:41 -07001304
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001305static struct platform_driver omap_aes_driver = {
1306 .probe = omap_aes_probe,
1307 .remove = omap_aes_remove,
1308 .driver = {
1309 .name = "omap-aes",
Mark A. Greer0635fb32013-01-08 11:57:41 -07001310 .pm = &omap_aes_pm_ops,
Mark A. Greerbc69d122013-01-08 11:57:44 -07001311 .of_match_table = omap_aes_of_match,
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001312 },
1313};
1314
Sachin Kamat94e51df2013-03-04 15:09:42 +05301315module_platform_driver(omap_aes_driver);
Dmitry Kasatkin537559a2010-09-03 19:16:02 +08001316
1317MODULE_DESCRIPTION("OMAP AES hw acceleration support.");
1318MODULE_LICENSE("GPL v2");
1319MODULE_AUTHOR("Dmitry Kasatkin");
1320