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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * amlgoic-core.c - hardware cryptographic offloader for Amlogic GXL SoC
4 *
5 * Copyright (C) 2018-2019 Corentin Labbe <clabbe@baylibre.com>
6 *
7 * Core file which registers crypto algorithms supported by the hardware.
8 */
9#include <linux/clk.h>
10#include <linux/crypto.h>
11#include <linux/io.h>
12#include <linux/interrupt.h>
13#include <linux/irq.h>
14#include <linux/module.h>
15#include <linux/of.h>
16#include <linux/of_device.h>
17#include <linux/platform_device.h>
18#include <crypto/internal/skcipher.h>
19#include <linux/dma-mapping.h>
20
21#include "amlogic-gxl.h"
22
23static irqreturn_t meson_irq_handler(int irq, void *data)
24{
25 struct meson_dev *mc = (struct meson_dev *)data;
26 int flow;
27 u32 p;
28
29 for (flow = 0; flow < MAXFLOW; flow++) {
30 if (mc->irqs[flow] == irq) {
31 p = readl(mc->base + ((0x04 + flow) << 2));
32 if (p) {
33 writel_relaxed(0xF, mc->base + ((0x4 + flow) << 2));
34 mc->chanlist[flow].status = 1;
35 complete(&mc->chanlist[flow].complete);
36 return IRQ_HANDLED;
37 }
38 dev_err(mc->dev, "%s %d Got irq for flow %d but ctrl is empty\n", __func__, irq, flow);
39 }
40 }
41
42 dev_err(mc->dev, "%s %d from unknown irq\n", __func__, irq);
43 return IRQ_HANDLED;
44}
45
46static struct meson_alg_template mc_algs[] = {
47{
48 .type = CRYPTO_ALG_TYPE_SKCIPHER,
49 .blockmode = MESON_OPMODE_CBC,
50 .alg.skcipher = {
51 .base = {
52 .cra_name = "cbc(aes)",
53 .cra_driver_name = "cbc-aes-gxl",
54 .cra_priority = 400,
55 .cra_blocksize = AES_BLOCK_SIZE,
56 .cra_flags = CRYPTO_ALG_TYPE_SKCIPHER |
57 CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY |
58 CRYPTO_ALG_NEED_FALLBACK,
59 .cra_ctxsize = sizeof(struct meson_cipher_tfm_ctx),
60 .cra_module = THIS_MODULE,
61 .cra_alignmask = 0xf,
62 .cra_init = meson_cipher_init,
63 .cra_exit = meson_cipher_exit,
64 },
65 .min_keysize = AES_MIN_KEY_SIZE,
66 .max_keysize = AES_MAX_KEY_SIZE,
67 .ivsize = AES_BLOCK_SIZE,
68 .setkey = meson_aes_setkey,
69 .encrypt = meson_skencrypt,
70 .decrypt = meson_skdecrypt,
71 }
72},
73{
74 .type = CRYPTO_ALG_TYPE_SKCIPHER,
75 .blockmode = MESON_OPMODE_ECB,
76 .alg.skcipher = {
77 .base = {
78 .cra_name = "ecb(aes)",
79 .cra_driver_name = "ecb-aes-gxl",
80 .cra_priority = 400,
81 .cra_blocksize = AES_BLOCK_SIZE,
82 .cra_flags = CRYPTO_ALG_TYPE_SKCIPHER |
83 CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY |
84 CRYPTO_ALG_NEED_FALLBACK,
85 .cra_ctxsize = sizeof(struct meson_cipher_tfm_ctx),
86 .cra_module = THIS_MODULE,
87 .cra_alignmask = 0xf,
88 .cra_init = meson_cipher_init,
89 .cra_exit = meson_cipher_exit,
90 },
91 .min_keysize = AES_MIN_KEY_SIZE,
92 .max_keysize = AES_MAX_KEY_SIZE,
93 .setkey = meson_aes_setkey,
94 .encrypt = meson_skencrypt,
95 .decrypt = meson_skdecrypt,
96 }
97},
98};
99
100#ifdef CONFIG_CRYPTO_DEV_AMLOGIC_GXL_DEBUG
101static int meson_debugfs_show(struct seq_file *seq, void *v)
102{
103 struct meson_dev *mc = seq->private;
104 int i;
105
106 for (i = 0; i < MAXFLOW; i++)
107 seq_printf(seq, "Channel %d: nreq %lu\n", i, mc->chanlist[i].stat_req);
108
109 for (i = 0; i < ARRAY_SIZE(mc_algs); i++) {
110 switch (mc_algs[i].type) {
111 case CRYPTO_ALG_TYPE_SKCIPHER:
112 seq_printf(seq, "%s %s %lu %lu\n",
113 mc_algs[i].alg.skcipher.base.cra_driver_name,
114 mc_algs[i].alg.skcipher.base.cra_name,
115 mc_algs[i].stat_req, mc_algs[i].stat_fb);
116 break;
117 }
118 }
119 return 0;
120}
121DEFINE_SHOW_ATTRIBUTE(meson_debugfs);
122#endif
123
124static void meson_free_chanlist(struct meson_dev *mc, int i)
125{
126 while (i >= 0) {
127 crypto_engine_exit(mc->chanlist[i].engine);
128 if (mc->chanlist[i].tl)
129 dma_free_coherent(mc->dev, sizeof(struct meson_desc) * MAXDESC,
130 mc->chanlist[i].tl,
131 mc->chanlist[i].t_phy);
132 i--;
133 }
134}
135
136/*
137 * Allocate the channel list structure
138 */
139static int meson_allocate_chanlist(struct meson_dev *mc)
140{
141 int i, err;
142
143 mc->chanlist = devm_kcalloc(mc->dev, MAXFLOW,
144 sizeof(struct meson_flow), GFP_KERNEL);
145 if (!mc->chanlist)
146 return -ENOMEM;
147
148 for (i = 0; i < MAXFLOW; i++) {
149 init_completion(&mc->chanlist[i].complete);
150
151 mc->chanlist[i].engine = crypto_engine_alloc_init(mc->dev, true);
152 if (!mc->chanlist[i].engine) {
153 dev_err(mc->dev, "Cannot allocate engine\n");
154 i--;
155 err = -ENOMEM;
156 goto error_engine;
157 }
158 err = crypto_engine_start(mc->chanlist[i].engine);
159 if (err) {
160 dev_err(mc->dev, "Cannot start engine\n");
161 goto error_engine;
162 }
163 mc->chanlist[i].tl = dma_alloc_coherent(mc->dev,
164 sizeof(struct meson_desc) * MAXDESC,
165 &mc->chanlist[i].t_phy,
166 GFP_KERNEL);
167 if (!mc->chanlist[i].tl) {
168 err = -ENOMEM;
169 goto error_engine;
170 }
171 }
172 return 0;
173error_engine:
174 meson_free_chanlist(mc, i);
175 return err;
176}
177
178static int meson_register_algs(struct meson_dev *mc)
179{
180 int err, i;
181
182 for (i = 0; i < ARRAY_SIZE(mc_algs); i++) {
183 mc_algs[i].mc = mc;
184 switch (mc_algs[i].type) {
185 case CRYPTO_ALG_TYPE_SKCIPHER:
186 err = crypto_register_skcipher(&mc_algs[i].alg.skcipher);
187 if (err) {
188 dev_err(mc->dev, "Fail to register %s\n",
189 mc_algs[i].alg.skcipher.base.cra_name);
190 mc_algs[i].mc = NULL;
191 return err;
192 }
193 break;
194 }
195 }
196
197 return 0;
198}
199
200static void meson_unregister_algs(struct meson_dev *mc)
201{
202 int i;
203
204 for (i = 0; i < ARRAY_SIZE(mc_algs); i++) {
205 if (!mc_algs[i].mc)
206 continue;
207 switch (mc_algs[i].type) {
208 case CRYPTO_ALG_TYPE_SKCIPHER:
209 crypto_unregister_skcipher(&mc_algs[i].alg.skcipher);
210 break;
211 }
212 }
213}
214
215static int meson_crypto_probe(struct platform_device *pdev)
216{
217 struct meson_dev *mc;
218 int err, i;
219
220 mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL);
221 if (!mc)
222 return -ENOMEM;
223
224 mc->dev = &pdev->dev;
225 platform_set_drvdata(pdev, mc);
226
227 mc->base = devm_platform_ioremap_resource(pdev, 0);
228 if (IS_ERR(mc->base)) {
229 err = PTR_ERR(mc->base);
230 dev_err(&pdev->dev, "Cannot request MMIO err=%d\n", err);
231 return err;
232 }
233 mc->busclk = devm_clk_get(&pdev->dev, "blkmv");
234 if (IS_ERR(mc->busclk)) {
235 err = PTR_ERR(mc->busclk);
236 dev_err(&pdev->dev, "Cannot get core clock err=%d\n", err);
237 return err;
238 }
239
240 for (i = 0; i < MAXFLOW; i++) {
241 mc->irqs[i] = platform_get_irq(pdev, i);
242 if (mc->irqs[i] < 0)
243 return mc->irqs[i];
244
245 err = devm_request_irq(&pdev->dev, mc->irqs[i], meson_irq_handler, 0,
246 "gxl-crypto", mc);
247 if (err < 0) {
248 dev_err(mc->dev, "Cannot request IRQ for flow %d\n", i);
249 return err;
250 }
251 }
252
253 err = clk_prepare_enable(mc->busclk);
254 if (err != 0) {
255 dev_err(&pdev->dev, "Cannot prepare_enable busclk\n");
256 return err;
257 }
258
259 err = meson_allocate_chanlist(mc);
260 if (err)
261 goto error_flow;
262
263 err = meson_register_algs(mc);
264 if (err)
265 goto error_alg;
266
267#ifdef CONFIG_CRYPTO_DEV_AMLOGIC_GXL_DEBUG
268 mc->dbgfs_dir = debugfs_create_dir("gxl-crypto", NULL);
269 debugfs_create_file("stats", 0444, mc->dbgfs_dir, mc, &meson_debugfs_fops);
270#endif
271
272 return 0;
273error_alg:
274 meson_unregister_algs(mc);
275error_flow:
276 meson_free_chanlist(mc, MAXFLOW - 1);
277 clk_disable_unprepare(mc->busclk);
278 return err;
279}
280
281static int meson_crypto_remove(struct platform_device *pdev)
282{
283 struct meson_dev *mc = platform_get_drvdata(pdev);
284
285#ifdef CONFIG_CRYPTO_DEV_AMLOGIC_GXL_DEBUG
286 debugfs_remove_recursive(mc->dbgfs_dir);
287#endif
288
289 meson_unregister_algs(mc);
290
291 meson_free_chanlist(mc, MAXFLOW - 1);
292
293 clk_disable_unprepare(mc->busclk);
294 return 0;
295}
296
297static const struct of_device_id meson_crypto_of_match_table[] = {
298 { .compatible = "amlogic,gxl-crypto", },
299 {}
300};
301MODULE_DEVICE_TABLE(of, meson_crypto_of_match_table);
302
303static struct platform_driver meson_crypto_driver = {
304 .probe = meson_crypto_probe,
305 .remove = meson_crypto_remove,
306 .driver = {
307 .name = "gxl-crypto",
308 .of_match_table = meson_crypto_of_match_table,
309 },
310};
311
312module_platform_driver(meson_crypto_driver);
313
314MODULE_DESCRIPTION("Amlogic GXL cryptographic offloader");
315MODULE_LICENSE("GPL");
316MODULE_AUTHOR("Corentin Labbe <clabbe@baylibre.com>");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * amlgoic-core.c - hardware cryptographic offloader for Amlogic GXL SoC
4 *
5 * Copyright (C) 2018-2019 Corentin Labbe <clabbe@baylibre.com>
6 *
7 * Core file which registers crypto algorithms supported by the hardware.
8 */
9
10#include <crypto/engine.h>
11#include <crypto/internal/skcipher.h>
12#include <linux/clk.h>
13#include <linux/dma-mapping.h>
14#include <linux/err.h>
15#include <linux/interrupt.h>
16#include <linux/io.h>
17#include <linux/irq.h>
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/of.h>
21#include <linux/platform_device.h>
22
23#include "amlogic-gxl.h"
24
25static irqreturn_t meson_irq_handler(int irq, void *data)
26{
27 struct meson_dev *mc = (struct meson_dev *)data;
28 int flow;
29 u32 p;
30
31 for (flow = 0; flow < MAXFLOW; flow++) {
32 if (mc->irqs[flow] == irq) {
33 p = readl(mc->base + ((0x04 + flow) << 2));
34 if (p) {
35 writel_relaxed(0xF, mc->base + ((0x4 + flow) << 2));
36 mc->chanlist[flow].status = 1;
37 complete(&mc->chanlist[flow].complete);
38 return IRQ_HANDLED;
39 }
40 dev_err(mc->dev, "%s %d Got irq for flow %d but ctrl is empty\n", __func__, irq, flow);
41 }
42 }
43
44 dev_err(mc->dev, "%s %d from unknown irq\n", __func__, irq);
45 return IRQ_HANDLED;
46}
47
48static struct meson_alg_template mc_algs[] = {
49{
50 .type = CRYPTO_ALG_TYPE_SKCIPHER,
51 .blockmode = MESON_OPMODE_CBC,
52 .alg.skcipher.base = {
53 .base = {
54 .cra_name = "cbc(aes)",
55 .cra_driver_name = "cbc-aes-gxl",
56 .cra_priority = 400,
57 .cra_blocksize = AES_BLOCK_SIZE,
58 .cra_flags = CRYPTO_ALG_TYPE_SKCIPHER |
59 CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY |
60 CRYPTO_ALG_NEED_FALLBACK,
61 .cra_ctxsize = sizeof(struct meson_cipher_tfm_ctx),
62 .cra_module = THIS_MODULE,
63 .cra_alignmask = 0xf,
64 .cra_init = meson_cipher_init,
65 .cra_exit = meson_cipher_exit,
66 },
67 .min_keysize = AES_MIN_KEY_SIZE,
68 .max_keysize = AES_MAX_KEY_SIZE,
69 .ivsize = AES_BLOCK_SIZE,
70 .setkey = meson_aes_setkey,
71 .encrypt = meson_skencrypt,
72 .decrypt = meson_skdecrypt,
73 },
74 .alg.skcipher.op = {
75 .do_one_request = meson_handle_cipher_request,
76 },
77},
78{
79 .type = CRYPTO_ALG_TYPE_SKCIPHER,
80 .blockmode = MESON_OPMODE_ECB,
81 .alg.skcipher.base = {
82 .base = {
83 .cra_name = "ecb(aes)",
84 .cra_driver_name = "ecb-aes-gxl",
85 .cra_priority = 400,
86 .cra_blocksize = AES_BLOCK_SIZE,
87 .cra_flags = CRYPTO_ALG_TYPE_SKCIPHER |
88 CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY |
89 CRYPTO_ALG_NEED_FALLBACK,
90 .cra_ctxsize = sizeof(struct meson_cipher_tfm_ctx),
91 .cra_module = THIS_MODULE,
92 .cra_alignmask = 0xf,
93 .cra_init = meson_cipher_init,
94 .cra_exit = meson_cipher_exit,
95 },
96 .min_keysize = AES_MIN_KEY_SIZE,
97 .max_keysize = AES_MAX_KEY_SIZE,
98 .setkey = meson_aes_setkey,
99 .encrypt = meson_skencrypt,
100 .decrypt = meson_skdecrypt,
101 },
102 .alg.skcipher.op = {
103 .do_one_request = meson_handle_cipher_request,
104 },
105},
106};
107
108static int meson_debugfs_show(struct seq_file *seq, void *v)
109{
110 struct meson_dev *mc __maybe_unused = seq->private;
111 int i;
112
113 for (i = 0; i < MAXFLOW; i++)
114 seq_printf(seq, "Channel %d: nreq %lu\n", i,
115#ifdef CONFIG_CRYPTO_DEV_AMLOGIC_GXL_DEBUG
116 mc->chanlist[i].stat_req);
117#else
118 0ul);
119#endif
120
121 for (i = 0; i < ARRAY_SIZE(mc_algs); i++) {
122 switch (mc_algs[i].type) {
123 case CRYPTO_ALG_TYPE_SKCIPHER:
124 seq_printf(seq, "%s %s %lu %lu\n",
125 mc_algs[i].alg.skcipher.base.base.cra_driver_name,
126 mc_algs[i].alg.skcipher.base.base.cra_name,
127#ifdef CONFIG_CRYPTO_DEV_AMLOGIC_GXL_DEBUG
128 mc_algs[i].stat_req, mc_algs[i].stat_fb);
129#else
130 0ul, 0ul);
131#endif
132 break;
133 }
134 }
135 return 0;
136}
137DEFINE_SHOW_ATTRIBUTE(meson_debugfs);
138
139static void meson_free_chanlist(struct meson_dev *mc, int i)
140{
141 while (i >= 0) {
142 crypto_engine_exit(mc->chanlist[i].engine);
143 if (mc->chanlist[i].tl)
144 dma_free_coherent(mc->dev, sizeof(struct meson_desc) * MAXDESC,
145 mc->chanlist[i].tl,
146 mc->chanlist[i].t_phy);
147 i--;
148 }
149}
150
151/*
152 * Allocate the channel list structure
153 */
154static int meson_allocate_chanlist(struct meson_dev *mc)
155{
156 int i, err;
157
158 mc->chanlist = devm_kcalloc(mc->dev, MAXFLOW,
159 sizeof(struct meson_flow), GFP_KERNEL);
160 if (!mc->chanlist)
161 return -ENOMEM;
162
163 for (i = 0; i < MAXFLOW; i++) {
164 init_completion(&mc->chanlist[i].complete);
165
166 mc->chanlist[i].engine = crypto_engine_alloc_init(mc->dev, true);
167 if (!mc->chanlist[i].engine) {
168 dev_err(mc->dev, "Cannot allocate engine\n");
169 i--;
170 err = -ENOMEM;
171 goto error_engine;
172 }
173 err = crypto_engine_start(mc->chanlist[i].engine);
174 if (err) {
175 dev_err(mc->dev, "Cannot start engine\n");
176 goto error_engine;
177 }
178 mc->chanlist[i].tl = dma_alloc_coherent(mc->dev,
179 sizeof(struct meson_desc) * MAXDESC,
180 &mc->chanlist[i].t_phy,
181 GFP_KERNEL);
182 if (!mc->chanlist[i].tl) {
183 err = -ENOMEM;
184 goto error_engine;
185 }
186 }
187 return 0;
188error_engine:
189 meson_free_chanlist(mc, i);
190 return err;
191}
192
193static int meson_register_algs(struct meson_dev *mc)
194{
195 int err, i;
196
197 for (i = 0; i < ARRAY_SIZE(mc_algs); i++) {
198 mc_algs[i].mc = mc;
199 switch (mc_algs[i].type) {
200 case CRYPTO_ALG_TYPE_SKCIPHER:
201 err = crypto_engine_register_skcipher(&mc_algs[i].alg.skcipher);
202 if (err) {
203 dev_err(mc->dev, "Fail to register %s\n",
204 mc_algs[i].alg.skcipher.base.base.cra_name);
205 mc_algs[i].mc = NULL;
206 return err;
207 }
208 break;
209 }
210 }
211
212 return 0;
213}
214
215static void meson_unregister_algs(struct meson_dev *mc)
216{
217 int i;
218
219 for (i = 0; i < ARRAY_SIZE(mc_algs); i++) {
220 if (!mc_algs[i].mc)
221 continue;
222 switch (mc_algs[i].type) {
223 case CRYPTO_ALG_TYPE_SKCIPHER:
224 crypto_engine_unregister_skcipher(&mc_algs[i].alg.skcipher);
225 break;
226 }
227 }
228}
229
230static int meson_crypto_probe(struct platform_device *pdev)
231{
232 struct meson_dev *mc;
233 int err, i;
234
235 mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL);
236 if (!mc)
237 return -ENOMEM;
238
239 mc->dev = &pdev->dev;
240 platform_set_drvdata(pdev, mc);
241
242 mc->base = devm_platform_ioremap_resource(pdev, 0);
243 if (IS_ERR(mc->base)) {
244 err = PTR_ERR(mc->base);
245 dev_err(&pdev->dev, "Cannot request MMIO err=%d\n", err);
246 return err;
247 }
248 mc->busclk = devm_clk_get(&pdev->dev, "blkmv");
249 if (IS_ERR(mc->busclk)) {
250 err = PTR_ERR(mc->busclk);
251 dev_err(&pdev->dev, "Cannot get core clock err=%d\n", err);
252 return err;
253 }
254
255 for (i = 0; i < MAXFLOW; i++) {
256 mc->irqs[i] = platform_get_irq(pdev, i);
257 if (mc->irqs[i] < 0)
258 return mc->irqs[i];
259
260 err = devm_request_irq(&pdev->dev, mc->irqs[i], meson_irq_handler, 0,
261 "gxl-crypto", mc);
262 if (err < 0) {
263 dev_err(mc->dev, "Cannot request IRQ for flow %d\n", i);
264 return err;
265 }
266 }
267
268 err = clk_prepare_enable(mc->busclk);
269 if (err != 0) {
270 dev_err(&pdev->dev, "Cannot prepare_enable busclk\n");
271 return err;
272 }
273
274 err = meson_allocate_chanlist(mc);
275 if (err)
276 goto error_flow;
277
278 err = meson_register_algs(mc);
279 if (err)
280 goto error_alg;
281
282 if (IS_ENABLED(CONFIG_CRYPTO_DEV_AMLOGIC_GXL_DEBUG)) {
283 struct dentry *dbgfs_dir;
284
285 dbgfs_dir = debugfs_create_dir("gxl-crypto", NULL);
286 debugfs_create_file("stats", 0444, dbgfs_dir, mc, &meson_debugfs_fops);
287
288#ifdef CONFIG_CRYPTO_DEV_AMLOGIC_GXL_DEBUG
289 mc->dbgfs_dir = dbgfs_dir;
290#endif
291 }
292
293 return 0;
294error_alg:
295 meson_unregister_algs(mc);
296error_flow:
297 meson_free_chanlist(mc, MAXFLOW - 1);
298 clk_disable_unprepare(mc->busclk);
299 return err;
300}
301
302static void meson_crypto_remove(struct platform_device *pdev)
303{
304 struct meson_dev *mc = platform_get_drvdata(pdev);
305
306#ifdef CONFIG_CRYPTO_DEV_AMLOGIC_GXL_DEBUG
307 debugfs_remove_recursive(mc->dbgfs_dir);
308#endif
309
310 meson_unregister_algs(mc);
311
312 meson_free_chanlist(mc, MAXFLOW - 1);
313
314 clk_disable_unprepare(mc->busclk);
315}
316
317static const struct of_device_id meson_crypto_of_match_table[] = {
318 { .compatible = "amlogic,gxl-crypto", },
319 {}
320};
321MODULE_DEVICE_TABLE(of, meson_crypto_of_match_table);
322
323static struct platform_driver meson_crypto_driver = {
324 .probe = meson_crypto_probe,
325 .remove_new = meson_crypto_remove,
326 .driver = {
327 .name = "gxl-crypto",
328 .of_match_table = meson_crypto_of_match_table,
329 },
330};
331
332module_platform_driver(meson_crypto_driver);
333
334MODULE_DESCRIPTION("Amlogic GXL cryptographic offloader");
335MODULE_LICENSE("GPL");
336MODULE_AUTHOR("Corentin Labbe <clabbe@baylibre.com>");