summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/aic7xxx/aic79xx_osm_pci.c
blob: c62ce41f2793750627130b0367547e3cf6fab736 (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
/*
 * Linux driver attachment glue for PCI based U320 controllers.
 *
 * Copyright (c) 2000-2001 Adaptec Inc.
 * All rights reserved.
 *
 * 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,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
 *
 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm_pci.c#25 $
 */

#include "aic79xx_osm.h"
#include "aic79xx_inline.h"
#include "aic79xx_pci.h"

static int	ahd_linux_pci_dev_probe(struct pci_dev *pdev,
					const struct pci_device_id *ent);
static int	ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd,
						 u_long *base, u_long *base2);
static int	ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
						 u_long *bus_addr,
						 uint8_t __iomem **maddr);
static void	ahd_linux_pci_dev_remove(struct pci_dev *pdev);

/* Define the macro locally since it's different for different class of chips.
 */
#define ID(x)            \
	ID2C(x),         \
	ID2C(IDIROC(x))

static struct pci_device_id ahd_linux_pci_id_table[] = {
	/* aic7901 based controllers */
	ID(ID_AHA_29320A),
	ID(ID_AHA_29320ALP),
	ID(ID_AHA_29320LPE),
	/* aic7902 based controllers */
	ID(ID_AHA_29320),
	ID(ID_AHA_29320B),
	ID(ID_AHA_29320LP),
	ID(ID_AHA_39320),
	ID(ID_AHA_39320_B),
	ID(ID_AHA_39320A),
	ID(ID_AHA_39320D),
	ID(ID_AHA_39320D_HP),
	ID(ID_AHA_39320D_B),
	ID(ID_AHA_39320D_B_HP),
	/* Generic chip probes for devices we don't know exactly. */
	ID16(ID_AIC7901 & ID_9005_GENERIC_MASK),
	ID(ID_AIC7901A & ID_DEV_VENDOR_MASK),
	ID16(ID_AIC7902 & ID_9005_GENERIC_MASK),
	{ 0 }
};

MODULE_DEVICE_TABLE(pci, ahd_linux_pci_id_table);

static struct pci_driver aic79xx_pci_driver = {
	.name		= "aic79xx",
	.probe		= ahd_linux_pci_dev_probe,
	.remove		= ahd_linux_pci_dev_remove,
	.id_table	= ahd_linux_pci_id_table
};

static void
ahd_linux_pci_dev_remove(struct pci_dev *pdev)
{
	struct ahd_softc *ahd = pci_get_drvdata(pdev);
	u_long s;

	if (ahd->platform_data && ahd->platform_data->host)
			scsi_remove_host(ahd->platform_data->host);

	ahd_lock(ahd, &s);
	ahd_intr_enable(ahd, FALSE);
	ahd_unlock(ahd, &s);
	ahd_free(ahd);
}

static void
ahd_linux_pci_inherit_flags(struct ahd_softc *ahd)
{
	struct pci_dev *pdev = ahd->dev_softc, *master_pdev;
	unsigned int master_devfn = PCI_DEVFN(PCI_SLOT(pdev->devfn), 0);

	master_pdev = pci_get_slot(pdev->bus, master_devfn);
	if (master_pdev) {
		struct ahd_softc *master = pci_get_drvdata(master_pdev);
		if (master) {
			ahd->flags &= ~AHD_BIOS_ENABLED;
			ahd->flags |= master->flags & AHD_BIOS_ENABLED;
		} else
			printk(KERN_ERR "aic79xx: no multichannel peer found!\n");
		pci_dev_put(master_pdev);
	}
}

static int
ahd_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	char		 buf[80];
	struct		 ahd_softc *ahd;
	ahd_dev_softc_t	 pci;
	struct		 ahd_pci_identity *entry;
	char		*name;
	int		 error;
	struct device	*dev = &pdev->dev;

	pci = pdev;
	entry = ahd_find_pci_device(pci);
	if (entry == NULL)
		return (-ENODEV);

	/*
	 * Allocate a softc for this card and
	 * set it up for attachment by our
	 * common detect routine.
	 */
	sprintf(buf, "ahd_pci:%d:%d:%d",
		ahd_get_pci_bus(pci),
		ahd_get_pci_slot(pci),
		ahd_get_pci_function(pci));
	name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
	if (name == NULL)
		return (-ENOMEM);
	strcpy(name, buf);
	ahd = ahd_alloc(NULL, name);
	if (ahd == NULL)
		return (-ENOMEM);
	if (pci_enable_device(pdev)) {
		ahd_free(ahd);
		return (-ENODEV);
	}
	pci_set_master(pdev);

	if (sizeof(dma_addr_t) > 4) {
		const u64 required_mask = dma_get_required_mask(dev);

		if (required_mask > DMA_39BIT_MASK &&
		    dma_set_mask(dev, DMA_64BIT_MASK) == 0)
			ahd->flags |= AHD_64BIT_ADDRESSING;
		else if (required_mask > DMA_32BIT_MASK &&
			 dma_set_mask(dev, DMA_39BIT_MASK) == 0)
			ahd->flags |= AHD_39BIT_ADDRESSING;
		else
			dma_set_mask(dev, DMA_32BIT_MASK);
	} else {
		dma_set_mask(dev, DMA_32BIT_MASK);
	}
	ahd->dev_softc = pci;
	error = ahd_pci_config(ahd, entry);
	if (error != 0) {
		ahd_free(ahd);
		return (-error);
	}

	/*
	 * Second Function PCI devices need to inherit some
	 * * settings from function 0.
	 */
	if ((ahd->features & AHD_MULTI_FUNC) && PCI_FUNC(pdev->devfn) != 0)
		ahd_linux_pci_inherit_flags(ahd);

	pci_set_drvdata(pdev, ahd);

	ahd_linux_register_host(ahd, &aic79xx_driver_template);
	return (0);
}

int
ahd_linux_pci_init(void)
{
	return pci_register_driver(&aic79xx_pci_driver);
}

void
ahd_linux_pci_exit(void)
{
	pci_unregister_driver(&aic79xx_pci_driver);
}

static int
ahd_linux_pci_reserve_io_regions(struct ahd_softc *ahd, u_long *base,
				 u_long *base2)
{
	*base = pci_resource_start(ahd->dev_softc, 0);
	/*
	 * This is really the 3rd bar and should be at index 2,
	 * but the Linux PCI code doesn't know how to "count" 64bit
	 * bars.
	 */
	*base2 = pci_resource_start(ahd->dev_softc, 3);
	if (*base == 0 || *base2 == 0)
		return (ENOMEM);
	if (!request_region(*base, 256, "aic79xx"))
		return (ENOMEM);
	if (!request_region(*base2, 256, "aic79xx")) {
		release_region(*base, 256);
		return (ENOMEM);
	}
	return (0);
}

static int
ahd_linux_pci_reserve_mem_region(struct ahd_softc *ahd,
				 u_long *bus_addr,
				 uint8_t __iomem **maddr)
{
	u_long	start;
	u_long	base_page;
	u_long	base_offset;
	int	error = 0;

	if (aic79xx_allow_memio == 0)
		return (ENOMEM);

	if ((ahd->bugs & AHD_PCIX_MMAPIO_BUG) != 0)
		return (ENOMEM);

	start = pci_resource_start(ahd->dev_softc, 1);
	base_page = start & PAGE_MASK;
	base_offset = start - base_page;
	if (start != 0) {
		*bus_addr = start;
		if (!request_mem_region(start, 0x1000, "aic79xx"))
			error = ENOMEM;
		if (!error) {
			*maddr = ioremap_nocache(base_page, base_offset + 512);
			if (*maddr == NULL) {
				error = ENOMEM;
				release_mem_region(start, 0x1000);
			} else
				*maddr += base_offset;
		}
	} else
		error = ENOMEM;
	return (error);
}

int
ahd_pci_map_registers(struct ahd_softc *ahd)
{
	uint32_t command;
	u_long	 base;
	uint8_t	__iomem *maddr;
	int	 error;

	/*
	 * If its allowed, we prefer memory mapped access.
	 */
	command = ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, 4);
	command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
	base = 0;
	maddr = NULL;
	error = ahd_linux_pci_reserve_mem_region(ahd, &base, &maddr);
	if (error == 0) {
		ahd->platform_data->mem_busaddr = base;
		ahd->tags[0] = BUS_SPACE_MEMIO;
		ahd->bshs[0].maddr = maddr;
		ahd->tags[1] = BUS_SPACE_MEMIO;
		ahd->bshs[1].maddr = maddr + 0x100;
		ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
				     command | PCIM_CMD_MEMEN, 4);

		if (ahd_pci_test_register_access(ahd) != 0) {

			printf("aic79xx: PCI Device %d:%d:%d "
			       "failed memory mapped test.  Using PIO.\n",
			       ahd_get_pci_bus(ahd->dev_softc),
			       ahd_get_pci_slot(ahd->dev_softc),
			       ahd_get_pci_function(ahd->dev_softc));
			iounmap(maddr);
			release_mem_region(ahd->platform_data->mem_busaddr,
					   0x1000);
			ahd->bshs[0].maddr = NULL;
			maddr = NULL;
		} else
			command |= PCIM_CMD_MEMEN;
	} else if (bootverbose) {
		printf("aic79xx: PCI%d:%d:%d MEM region 0x%lx "
		       "unavailable. Cannot memory map device.\n",
		       ahd_get_pci_bus(ahd->dev_softc),
		       ahd_get_pci_slot(ahd->dev_softc),
		       ahd_get_pci_function(ahd->dev_softc),
		       base);
	}

	if (maddr == NULL) {
		u_long	 base2;

		error = ahd_linux_pci_reserve_io_regions(ahd, &base, &base2);
		if (error == 0) {
			ahd->tags[0] = BUS_SPACE_PIO;
			ahd->tags[1] = BUS_SPACE_PIO;
			ahd->bshs[0].ioport = base;
			ahd->bshs[1].ioport = base2;
			command |= PCIM_CMD_PORTEN;
		} else {
			printf("aic79xx: PCI%d:%d:%d IO regions 0x%lx and 0x%lx"
			       "unavailable. Cannot map device.\n",
			       ahd_get_pci_bus(ahd->dev_softc),
			       ahd_get_pci_slot(ahd->dev_softc),
			       ahd_get_pci_function(ahd->dev_softc),
			       base, base2);
		}
	}
	ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND, command, 4);
	return (error);
}

int
ahd_pci_map_int(struct ahd_softc *ahd)
{
	int error;

	error = request_irq(ahd->dev_softc->irq, ahd_linux_isr,
			    IRQF_SHARED, "aic79xx", ahd);
	if (!error)
		ahd->platform_data->irq = ahd->dev_softc->irq;
	
	return (-error);
}

void
ahd_power_state_change(struct ahd_softc *ahd, ahd_power_state new_state)
{
	pci_set_power_state(ahd->dev_softc, new_state);
}
OpenPOWER on IntegriCloud