aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/generic/files/crypto/ocf/hifn/hifnHIPP.c
blob: a69e630e9ecdae85137549e2f345e0224190e824 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
/*-
 * Driver for Hifn HIPP-I/II chipset
 * Copyright (c) 2006 Michael Richardson <mcr@xelerance.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Effort sponsored by Hifn Inc.
 *
 */

/*
 * Driver for various Hifn encryption processors.
 */
#include <linux/version.h>
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,38) && !defined(AUTOCONF_INCLUDED)
#include <linux/config.h>
#endif
#include <linux/module.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/wait.h>
#include <linux/sched.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/random.h>
#include <linux/skbuff.h>
#include <linux/uio.h>
#include <linux/sysfs.h>
#include <linux/miscdevice.h>
#include <asm/io.h>

#include <cryptodev.h>

#include "hifnHIPPreg.h"
#include "hifnHIPPvar.h"

#if 1
#define	DPRINTF(a...)	if (hipp_debug) { \
							printk("%s: ", sc ? \
								device_get_nameunit(sc->sc_dev) : "hifn"); \
							printk(a); \
						} else
#else
#define	DPRINTF(a...)
#endif

typedef int bus_size_t;

static inline int
pci_get_revid(struct pci_dev *dev)
{
	u8 rid = 0;
	pci_read_config_byte(dev, PCI_REVISION_ID, &rid);
	return rid;
}

#define debug hipp_debug
int hipp_debug = 0;
module_param(hipp_debug, int, 0644);
MODULE_PARM_DESC(hipp_debug, "Enable debug");

int hipp_maxbatch = 1;
module_param(hipp_maxbatch, int, 0644);
MODULE_PARM_DESC(hipp_maxbatch, "max ops to batch w/o interrupt");

static	int  hipp_probe(struct pci_dev *dev, const struct pci_device_id *ent);
static	void hipp_remove(struct pci_dev *dev);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
static irqreturn_t hipp_intr(int irq, void *arg);
#else
static irqreturn_t hipp_intr(int irq, void *arg, struct pt_regs *regs);
#endif

static int hipp_num_chips = 0;
static struct hipp_softc *hipp_chip_idx[HIPP_MAX_CHIPS];

static	int hipp_newsession(device_t, u_int32_t *, struct cryptoini *);
static	int hipp_freesession(device_t, u_int64_t);
static	int hipp_process(device_t, struct cryptop *, int);

static device_method_t hipp_methods = {
	/* crypto device methods */
	DEVMETHOD(cryptodev_newsession,	hipp_newsession),
	DEVMETHOD(cryptodev_freesession,hipp_freesession),
	DEVMETHOD(cryptodev_process,	hipp_process),
};

static __inline u_int32_t
READ_REG(struct hipp_softc *sc, unsigned int barno, bus_size_t reg)
{
	u_int32_t v = readl(sc->sc_bar[barno] + reg);
	//sc->sc_bar0_lastreg = (bus_size_t) -1;
	return (v);
}
static __inline void
WRITE_REG(struct hipp_softc *sc, unsigned int barno, bus_size_t reg, u_int32_t val)
{
	writel(val, sc->sc_bar[barno] + reg);
}

#define READ_REG_0(sc, reg)         READ_REG(sc, 0, reg)
#define WRITE_REG_0(sc, reg, val)   WRITE_REG(sc,0, reg, val)
#define READ_REG_1(sc, reg)         READ_REG(sc, 1, reg)
#define WRITE_REG_1(sc, reg, val)   WRITE_REG(sc,1, reg, val)

static int
hipp_newsession(device_t dev, u_int32_t *sidp, struct cryptoini *cri)
{
	return EINVAL;
}

static int
hipp_freesession(device_t dev, u_int64_t tid)
{
	return EINVAL;
}

static int
hipp_process(device_t dev, struct cryptop *crp, int hint)
{
	return EINVAL;
}

static const char*
hipp_partname(struct hipp_softc *sc, char buf[128], size_t blen)
{
	char *n = NULL;

	switch (pci_get_vendor(sc->sc_pcidev)) {
	case PCI_VENDOR_HIFN:
		switch (pci_get_device(sc->sc_pcidev)) {
		case PCI_PRODUCT_HIFN_7855:	n = "Hifn 7855";
		case PCI_PRODUCT_HIFN_8155:	n = "Hifn 8155";
		case PCI_PRODUCT_HIFN_6500:	n = "Hifn 6500";
		}
	}

	if(n==NULL) {
		snprintf(buf, blen, "VID=%02x,PID=%02x",
			 pci_get_vendor(sc->sc_pcidev),
			 pci_get_device(sc->sc_pcidev));
	} else {
		buf[0]='\0';
		strncat(buf, n, blen);
	}
	return buf;
}

struct hipp_fs_entry {
	struct attribute attr;
	/* other stuff */
};


static ssize_t
cryptoid_show(struct device *dev,
	      struct device_attribute *attr,
	      char *buf)						
{								
	struct hipp_softc *sc;					

	sc = pci_get_drvdata(to_pci_dev (dev));
	return sprintf (buf, "%d\n", sc->sc_cid);
}

struct device_attribute hipp_dev_cryptoid = __ATTR_RO(cryptoid);

/*
 * Attach an interface that successfully probed.
 */
static int
hipp_probe(struct pci_dev *dev, const struct pci_device_id *ent)
{
	struct hipp_softc *sc = NULL;
	int i;
	//char rbase;
	//u_int16_t ena;
	int rev;
	//int rseg;
	int rc;

	DPRINTF("%s()\n", __FUNCTION__);

	if (pci_enable_device(dev) < 0)
		return(-ENODEV);

	if (pci_set_mwi(dev))
		return(-ENODEV);

	if (!dev->irq) {
		printk("hifn: found device with no IRQ assigned. check BIOS settings!");
		pci_disable_device(dev);
		return(-ENODEV);
	}

	sc = (struct hipp_softc *) kmalloc(sizeof(*sc), GFP_KERNEL);
	if (!sc)
		return(-ENOMEM);
	memset(sc, 0, sizeof(*sc));

	softc_device_init(sc, "hifn-hipp", hipp_num_chips, hipp_methods);

	sc->sc_pcidev = dev;
	sc->sc_irq = -1;
	sc->sc_cid = -1;
	sc->sc_num = hipp_num_chips++;

	if (sc->sc_num < HIPP_MAX_CHIPS)
		hipp_chip_idx[sc->sc_num] = sc;

	pci_set_drvdata(sc->sc_pcidev, sc);

	spin_lock_init(&sc->sc_mtx);

	/*
	 * Setup PCI resources.
	 * The READ_REG_0, WRITE_REG_0, READ_REG_1,
	 * and WRITE_REG_1 macros throughout the driver are used
	 * to permit better debugging.
	 */
	for(i=0; i<4; i++) {
		unsigned long mem_start, mem_len;
		mem_start = pci_resource_start(sc->sc_pcidev, i);
		mem_len   = pci_resource_len(sc->sc_pcidev, i);
		sc->sc_barphy[i] = (caddr_t)mem_start;
		sc->sc_bar[i] = (ocf_iomem_t) ioremap(mem_start, mem_len);
		if (!sc->sc_bar[i]) {
			device_printf(sc->sc_dev, "cannot map bar%d register space\n", i);
			goto fail;
		}
	}

	//hipp_reset_board(sc, 0);
	pci_set_master(sc->sc_pcidev);

	/*
	 * Arrange the interrupt line.
	 */
	rc = request_irq(dev->irq, hipp_intr, IRQF_SHARED, "hifn", sc);
	if (rc) {
		device_printf(sc->sc_dev, "could not map interrupt: %d\n", rc);
		goto fail;
	}
	sc->sc_irq = dev->irq;

	rev = READ_REG_1(sc, HIPP_1_REVID) & 0xffff;

	{
		char b[32];
		device_printf(sc->sc_dev, "%s, rev %u",
			      hipp_partname(sc, b, sizeof(b)), rev);
	}

#if 0
	if (sc->sc_flags & HIFN_IS_7956)
		printf(", pll=0x%x<%s clk, %ux mult>",
			sc->sc_pllconfig,
			sc->sc_pllconfig & HIFN_PLL_REF_SEL ? "ext" : "pci",
			2 + 2*((sc->sc_pllconfig & HIFN_PLL_ND) >> 11));
#endif
	printf("\n");

	sc->sc_cid = crypto_get_driverid(softc_get_device(sc),CRYPTOCAP_F_HARDWARE);
	if (sc->sc_cid < 0) {
		device_printf(sc->sc_dev, "could not get crypto driver id\n");
		goto fail;
	}

#if 0 /* cannot work with a non-GPL module */
	/* make a sysfs entry to let the world know what entry we got */
	sysfs_create_file(&sc->sc_pcidev->dev.kobj, &hipp_dev_cryptoid.attr);
#endif

#if 0
	init_timer(&sc->sc_tickto);
	sc->sc_tickto.function = hifn_tick;
	sc->sc_tickto.data = (unsigned long) sc->sc_num;
	mod_timer(&sc->sc_tickto, jiffies + HZ);
#endif

#if 0 /* no code here yet ?? */
	crypto_register(sc->sc_cid, CRYPTO_3DES_CBC, 0, 0);
#endif

	return (0);

fail:
	if (sc->sc_cid >= 0)
		crypto_unregister_all(sc->sc_cid);
	if (sc->sc_irq != -1)
		free_irq(sc->sc_irq, sc);
	
#if 0
	if (sc->sc_dma) {
		/* Turn off DMA polling */
		WRITE_REG_1(sc, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET |
			    HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE);
		
		pci_free_consistent(sc->sc_pcidev,
				    sizeof(*sc->sc_dma),
				    sc->sc_dma, sc->sc_dma_physaddr);
	}
#endif
	kfree(sc);
	return (-ENXIO);
}

/*
 * Detach an interface that successfully probed.
 */
static void
hipp_remove(struct pci_dev *dev)
{
	struct hipp_softc *sc = pci_get_drvdata(dev);
	unsigned long l_flags;

	DPRINTF("%s()\n", __FUNCTION__);

	/* disable interrupts */
	HIPP_LOCK(sc);

#if 0
	WRITE_REG_1(sc, HIFN_1_DMA_IER, 0);
	HIFN_UNLOCK(sc);

	/*XXX other resources */
	del_timer_sync(&sc->sc_tickto);

	/* Turn off DMA polling */
	WRITE_REG_1(sc, HIFN_1_DMA_CNFG, HIFN_DMACNFG_MSTRESET |
	    HIFN_DMACNFG_DMARESET | HIFN_DMACNFG_MODE);
#endif

	crypto_unregister_all(sc->sc_cid);

	free_irq(sc->sc_irq, sc);

#if 0
	pci_free_consistent(sc->sc_pcidev, sizeof(*sc->sc_dma),
                sc->sc_dma, sc->sc_dma_physaddr);
#endif
}

#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
static irqreturn_t hipp_intr(int irq, void *arg)
#else
static irqreturn_t hipp_intr(int irq, void *arg, struct pt_regs *regs)
#endif
{
	struct hipp_softc *sc = arg;

	sc = sc; /* shut up compiler */

	return IRQ_HANDLED;
}

static struct pci_device_id hipp_pci_tbl[] = {
	{ PCI_VENDOR_HIFN, PCI_PRODUCT_HIFN_7855,
	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
	{ PCI_VENDOR_HIFN, PCI_PRODUCT_HIFN_8155,
	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, },
	{ 0 }, /* terminating entry */
};
MODULE_DEVICE_TABLE(pci, hipp_pci_tbl);

static struct pci_driver hipp_driver = {
	.name         = "hipp",
	.id_table     = hipp_pci_tbl,
	.probe        =	hipp_probe,
	.remove       = hipp_remove,
	/* add PM stuff here one day */
};

static int __init hipp_init (void)
{
	struct hipp_softc *sc = NULL;
	int rc;

	DPRINTF("%s(%p)\n", __FUNCTION__, hipp_init);

	rc = pci_register_driver(&hipp_driver);
	pci_register_driver_compat(&hipp_driver, rc);

	return rc;
}

static void __exit hipp_exit (void)
{
	pci_unregister_driver(&hipp_driver);
}

module_init(hipp_init);
module_exit(hipp_exit);

MODULE_LICENSE("BSD");
MODULE_AUTHOR("Michael Richardson <mcr@xelerance.com>");
MODULE_DESCRIPTION("OCF driver for hifn HIPP-I/II PCI crypto devices");