45ad7bacfa1181feb65a72409b79bef1ea63924a
[openwrt/svn-archive/archive.git] / target / linux / generic-2.4 / files / crypto / ocf / hifn / hifnHIPP.c
1 /*-
2 * Driver for Hifn HIPP-I/II chipset
3 * Copyright (c) 2006 Michael Richardson <mcr@xelerance.com>
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Effort sponsored by Hifn Inc.
29 *
30 */
31
32 /*
33 * Driver for various Hifn encryption processors.
34 */
35 #ifndef AUTOCONF_INCLUDED
36 #include <linux/config.h>
37 #endif
38 #include <linux/module.h>
39 #include <linux/init.h>
40 #include <linux/list.h>
41 #include <linux/slab.h>
42 #include <linux/wait.h>
43 #include <linux/sched.h>
44 #include <linux/pci.h>
45 #include <linux/delay.h>
46 #include <linux/interrupt.h>
47 #include <linux/spinlock.h>
48 #include <linux/random.h>
49 #include <linux/version.h>
50 #include <linux/skbuff.h>
51 #include <linux/uio.h>
52 #include <linux/sysfs.h>
53 #include <linux/miscdevice.h>
54 #include <asm/io.h>
55
56 #include <cryptodev.h>
57
58 #include "hifnHIPPreg.h"
59 #include "hifnHIPPvar.h"
60
61 #if 1
62 #define DPRINTF(a...) if (hipp_debug) { \
63 printk("%s: ", sc ? \
64 device_get_nameunit(sc->sc_dev) : "hifn"); \
65 printk(a); \
66 } else
67 #else
68 #define DPRINTF(a...)
69 #endif
70
71 typedef int bus_size_t;
72
73 static inline int
74 pci_get_revid(struct pci_dev *dev)
75 {
76 u8 rid = 0;
77 pci_read_config_byte(dev, PCI_REVISION_ID, &rid);
78 return rid;
79 }
80
81 #define debug hipp_debug
82 int hipp_debug = 0;
83 module_param(hipp_debug, int, 0644);
84 MODULE_PARM_DESC(hipp_debug, "Enable debug");
85
86 int hipp_maxbatch = 1;
87 module_param(hipp_maxbatch, int, 0644);
88 MODULE_PARM_DESC(hipp_maxbatch, "max ops to batch w/o interrupt");
89
90 static int hipp_probe(struct pci_dev *dev, const struct pci_device_id *ent);
91 static void hipp_remove(struct pci_dev *dev);
92 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
93 static irqreturn_t hipp_intr(int irq, void *arg);
94 #else
95 static irqreturn_t hipp_intr(int irq, void *arg, struct pt_regs *regs);
96 #endif
97
98 static int hipp_num_chips = 0;
99 static struct hipp_softc *hipp_chip_idx[HIPP_MAX_CHIPS];
100
101 static int hipp_newsession(device_t, u_int32_t *, struct cryptoini *);
102 static int hipp_freesession(device_t, u_int64_t);
103 static int hipp_process(device_t, struct cryptop *, int);
104
105 static device_method_t hipp_methods = {
106 /* crypto device methods */
107 DEVMETHOD(cryptodev_newsession, hipp_newsession),
108 DEVMETHOD(cryptodev_freesession,hipp_freesession),
109 DEVMETHOD(cryptodev_process, hipp_process),
110 };
111
112 static __inline u_int32_t
113 READ_REG(struct hipp_softc *sc, unsigned int barno, bus_size_t reg)
114 {
115 u_int32_t v = readl(sc->sc_bar[barno] + reg);
116 //sc->sc_bar0_lastreg = (bus_size_t) -1;
117 return (v);
118 }
119 static __inline void
120 WRITE_REG(struct hipp_softc *sc, unsigned int barno, bus_size_t reg, u_int32_t val)
121 {
122 writel(val, sc->sc_bar[barno] + reg);
123 }
124
125 #define READ_REG_0(sc, reg) READ_REG(sc, 0, reg)
126 #define WRITE_REG_0(sc, reg, val) WRITE_REG(sc,0, reg, val)
127 #define READ_REG_1(sc, reg) READ_REG(sc, 1, reg)
128 #define WRITE_REG_1(sc, reg, val) WRITE_REG(sc,1, reg, val)
129
130 static int
131 hipp_newsession(device_t dev, u_int32_t *sidp, struct cryptoini *cri)
132 {
133 return EINVAL;
134 }
135
136 static int
137 hipp_freesession(device_t dev, u_int64_t tid)
138 {
139 return EINVAL;
140 }
141
142 static int
143 hipp_process(device_t dev, struct cryptop *crp, int hint)
144 {
145 return EINVAL;
146 }
147
148 static const char*
149 hipp_partname(struct hipp_softc *sc, char buf[128], size_t blen)
150 {
151 char *n = NULL;
152
153 switch (pci_get_vendor(sc->sc_pcidev)) {
154 case PCI_VENDOR_HIFN:
155 switch (pci_get_device(sc->sc_pcidev)) {
156 case PCI_PRODUCT_HIFN_7855: n = "Hifn 7855";
157 case PCI_PRODUCT_HIFN_8155: n = "Hifn 8155";
158 case PCI_PRODUCT_HIFN_6500: n = "Hifn 6500";
159 }
160 }
161
162 if(n==NULL) {
163 snprintf(buf, blen, "VID=%02x,PID=%02x",
164 pci_get_vendor(sc->sc_pcidev),
165 pci_get_device(sc->sc_pcidev));
166 } else {
167 buf[0]='\0';
168 strncat(buf, n, blen);
169 }
170 return buf;
171 }
172
173 struct hipp_fs_entry {
174 struct attribute attr;
175 /* other stuff */
176 };
177
178
179 static ssize_t
180 cryptoid_show(struct device *dev,
181 struct device_attribute *attr,
182 char *buf)
183 {
184 struct hipp_softc *sc;
185
186 sc = pci_get_drvdata(to_pci_dev (dev));
187 return sprintf (buf, "%d\n", sc->sc_cid);
188 }
189
190 struct device_attribute hipp_dev_cryptoid = __ATTR_RO(cryptoid);
191
192 /*
193 * Attach an interface that successfully probed.
194 */
195 static int
196 hipp_probe(struct pci_dev *dev, const struct pci_device_id *ent)
197 {
198 struct hipp_softc *sc = NULL;
199 int i;
200 //char rbase;
201 //u_int16_t ena;
202 int rev;
203 //int rseg;
204 int rc;
205
206 DPRINTF("%s()\n", __FUNCTION__);
207
208 if (pci_enable_device(dev) < 0)
209 return(-ENODEV);
210
211 if (pci_set_mwi(dev))
212 return(-ENODEV);
213
214 if (!dev->irq) {
215 printk("hifn: found device with no IRQ assigned. check BIOS settings!");
216 pci_disable_device(dev);
217 return(-ENODEV);
218 }
219
220 sc = (struct hipp_softc *) kmalloc(sizeof(*sc), GFP_KERNEL);
221 if (!sc)
222 return(-ENOMEM);
223 memset(sc, 0, sizeof(*sc));
224
225 softc_device_init(sc, "hifn-hipp", hipp_num_chips, hipp_methods);
226
227 sc->sc_pcidev = dev;
228 sc->sc_irq = -1;
229 sc->sc_cid = -1;
230 sc->sc_num = hipp_num_chips++;
231
232 if (sc->sc_num < HIPP_MAX_CHIPS)
233 hipp_chip_idx[sc->sc_num] = sc;
234
235 pci_set_drvdata(sc->sc_pcidev, sc);
236
237 spin_lock_init(&sc->sc_mtx);
238
239 /*
240 * Setup PCI resources.
241 * The READ_REG_0, WRITE_REG_0, READ_REG_1,
242 * and WRITE_REG_1 macros throughout the driver are used
243 * to permit better debugging.
244 */
245 for(i=0; i<4; i++) {
246 unsigned long mem_start, mem_len;
247 mem_start = pci_resource_start(sc->sc_pcidev, i);
248 mem_len = pci_resource_len(sc->sc_pcidev, i);
249 sc->sc_barphy[i] = (caddr_t)mem_start;
250 sc->sc_bar[i] = (ocf_iomem_t) ioremap(mem_start, mem_len);
251 if (!sc->sc_bar[i]) {
252 device_printf(sc->sc_dev, "cannot map bar%d register space\n", i);
253 goto fail;
254 }
255 }
256
257 //hipp_reset_board(sc, 0);
258 pci_set_master(sc->sc_pcidev);
259
260 /*
261 * Arrange the interrupt line.
262 */
263 rc = request_irq(dev->irq, hipp_intr, IRQF_SHARED, "hifn", sc);
264 if (rc) {
265 device_printf(sc->sc_dev, "could not map interrupt: %d\n", rc);
266 goto fail;
267 }
268 sc->sc_irq = dev->irq;
269
270 rev = READ_REG_1(sc, HIPP_1_REVID) & 0xffff;
271
272 {
273 char b[32];
274 device_printf(sc->sc_dev, "%s, rev %u",
275 hipp_partname(sc, b, sizeof(b)), rev);
276 }
277
278 #if 0
279 if (sc->sc_flags & HIFN_IS_7956)
280 printf(", pll=0x%x<%s clk, %ux mult>",
281 sc->sc_pllconfig,
282 sc->sc_pllconfig & HIFN_PLL_REF_SEL ? "ext" : "pci",
283 2 + 2*((sc->sc_pllconfig & HIFN_PLL_ND) >> 11));
284 #endif
285 printf("\n");
286
287 sc->sc_cid = crypto_get_driverid(softc_get_device(sc),CRYPTOCAP_F_HARDWARE);
288 if (sc->sc_cid < 0) {
289 device_printf(sc->sc_dev, "could not get crypto driver id\n");
290 goto fail;
291 }
292
293 #if 0 /* cannot work with a non-GPL module */
294 /* make a sysfs entry to let the world know what entry we got */
295 sysfs_create_file(&sc->sc_pcidev->dev.kobj, &hipp_dev_cryptoid.attr);
296 #endif
297
298 #if 0
299 init_timer(&sc->sc_tickto);
300 sc->sc_tickto.function = hifn_tick;
301 sc->sc_tickto.data = (unsigned long) sc->sc_num;
302 mod_timer(&sc->sc_tickto, jiffies + HZ);
303 #endif
304
305 #if 0 /* no code here yet ?? */
306 crypto_register(sc->sc_cid, CRYPTO_3DES_CBC, 0, 0);
307 #endif
308
309 return (0);
310
311 fail:
312 if (sc->sc_cid >= 0)
313 crypto_unregister_all(sc->sc_cid);
314 if (sc->sc_irq != -1)
315 free_irq(sc->sc_irq, sc);
316
317 #if 0
318 if (sc->sc_dma) {
319 /* Turn off DMA polling */
320 WRITE_REG_1(sc, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET |
321 HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE);
322
323 pci_free_consistent(sc->sc_pcidev,
324 sizeof(*sc->sc_dma),
325 sc->sc_dma, sc->sc_dma_physaddr);
326 }
327 #endif
328 kfree(sc);
329 return (-ENXIO);
330 }
331
332 /*
333 * Detach an interface that successfully probed.
334 */
335 static void
336 hipp_remove(struct pci_dev *dev)
337 {
338 struct hipp_softc *sc = pci_get_drvdata(dev);
339 unsigned long l_flags;
340
341 DPRINTF("%s()\n", __FUNCTION__);
342
343 /* disable interrupts */
344 HIPP_LOCK(sc);
345
346 #if 0
347 WRITE_REG_1(sc, HIFN_1_DMA_IER, 0);
348 HIFN_UNLOCK(sc);
349
350 /*XXX other resources */
351 del_timer_sync(&sc->sc_tickto);
352
353 /* Turn off DMA polling */
354 WRITE_REG_1(sc, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET |
355 HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE);
356 #endif
357
358 crypto_unregister_all(sc->sc_cid);
359
360 free_irq(sc->sc_irq, sc);
361
362 #if 0
363 pci_free_consistent(sc->sc_pcidev, sizeof(*sc->sc_dma),
364 sc->sc_dma, sc->sc_dma_physaddr);
365 #endif
366 }
367
368 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
369 static irqreturn_t hipp_intr(int irq, void *arg)
370 #else
371 static irqreturn_t hipp_intr(int irq, void *arg, struct pt_regs *regs)
372 #endif
373 {
374 struct hipp_softc *sc = arg;
375
376 sc = sc; /* shut up compiler */
377
378 return IRQ_HANDLED;
379 }
380
381 static struct pci_device_id hipp_pci_tbl[] = {
382 { PCI_VENDOR_HIFN, PCI_PRODUCT_HIFN_7855,
383 PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
384 { PCI_VENDOR_HIFN, PCI_PRODUCT_HIFN_8155,
385 PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
386 };
387 MODULE_DEVICE_TABLE(pci, hipp_pci_tbl);
388
389 static struct pci_driver hipp_driver = {
390 .name = "hipp",
391 .id_table = hipp_pci_tbl,
392 .probe = hipp_probe,
393 .remove = hipp_remove,
394 /* add PM stuff here one day */
395 };
396
397 static int __init hipp_init (void)
398 {
399 struct hipp_softc *sc = NULL;
400 int rc;
401
402 DPRINTF("%s(%p)\n", __FUNCTION__, hipp_init);
403
404 rc = pci_register_driver(&hipp_driver);
405 pci_register_driver_compat(&hipp_driver, rc);
406
407 return rc;
408 }
409
410 static void __exit hipp_exit (void)
411 {
412 pci_unregister_driver(&hipp_driver);
413 }
414
415 module_init(hipp_init);
416 module_exit(hipp_exit);
417
418 MODULE_LICENSE("BSD");
419 MODULE_AUTHOR("Michael Richardson <mcr@xelerance.com>");
420 MODULE_DESCRIPTION("OCF driver for hifn HIPP-I/II PCI crypto devices");