blob: 09dcb699e6674e4ba5d3301149be994fcf17c46d [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
Brent Casavant107d5a72006-10-17 00:09:24 -07006 * Copyright (C) 2005-2006 Silicon Graphics, Inc. All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 */
8
Brent Casavant22329b52005-06-21 17:15:59 -07009/* This file contains the master driver module for use by SGI IOC4 subdrivers.
10 *
11 * It allocates any resources shared between multiple subdevices, and
12 * provides accessor functions (where needed) and the like for those
13 * resources. It also provides a mechanism for the subdevice modules
14 * to support loading and unloading.
15 *
16 * Non-shared resources (e.g. external interrupt A_INT_OUT register page
17 * alias, serial port and UART registers) are handled by the subdevice
18 * modules themselves.
19 *
20 * This is all necessary because IOC4 is not implemented as a multi-function
21 * PCI device, but an amalgamation of disparate registers for several
22 * types of device (ATA, serial, external interrupts). The normal
23 * resource management in the kernel doesn't have quite the right interfaces
24 * to handle this situation (e.g. multiple modules can't claim the same
25 * PCI ID), thus this IOC4 master module.
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 */
27
28#include <linux/errno.h>
29#include <linux/module.h>
30#include <linux/pci.h>
Brent Casavant22329b52005-06-21 17:15:59 -070031#include <linux/ioc4.h>
Brent Casavant107d5a72006-10-17 00:09:24 -070032#include <linux/ktime.h>
Jes Sorensen6e586f32006-01-17 12:24:39 -050033#include <linux/mutex.h>
Brent Casavant107d5a72006-10-17 00:09:24 -070034#include <linux/time.h>
Al Viro2099c992006-10-24 11:17:06 +010035#include <asm/io.h>
Brent Casavantd4c477c2005-06-21 17:16:01 -070036
37/***************
38 * Definitions *
39 ***************/
40
41/* Tweakable values */
42
43/* PCI bus speed detection/calibration */
Brent Casavant107d5a72006-10-17 00:09:24 -070044#define IOC4_CALIBRATE_COUNT 63 /* Calibration cycle period */
Brent Casavantd4c477c2005-06-21 17:16:01 -070045#define IOC4_CALIBRATE_CYCLES 256 /* Average over this many cycles */
46#define IOC4_CALIBRATE_DISCARD 2 /* Discard first few cycles */
47#define IOC4_CALIBRATE_LOW_MHZ 25 /* Lower bound on bus speed sanity */
48#define IOC4_CALIBRATE_HIGH_MHZ 75 /* Upper bound on bus speed sanity */
49#define IOC4_CALIBRATE_DEFAULT_MHZ 66 /* Assumed if sanity check fails */
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Brent Casavant22329b52005-06-21 17:15:59 -070051/************************
52 * Submodule management *
53 ************************/
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
Jes Sorensen6e586f32006-01-17 12:24:39 -050055static DEFINE_MUTEX(ioc4_mutex);
Brent Casavant22329b52005-06-21 17:15:59 -070056
Jes Sorensen6e586f32006-01-17 12:24:39 -050057static LIST_HEAD(ioc4_devices);
Brent Casavant22329b52005-06-21 17:15:59 -070058static LIST_HEAD(ioc4_submodules);
Brent Casavant22329b52005-06-21 17:15:59 -070059
60/* Register an IOC4 submodule */
61int
62ioc4_register_submodule(struct ioc4_submodule *is)
Linus Torvalds1da177e2005-04-16 15:20:36 -070063{
Brent Casavant22329b52005-06-21 17:15:59 -070064 struct ioc4_driver_data *idd;
65
Jes Sorensen6e586f32006-01-17 12:24:39 -050066 mutex_lock(&ioc4_mutex);
Brent Casavant22329b52005-06-21 17:15:59 -070067 list_add(&is->is_list, &ioc4_submodules);
Brent Casavant22329b52005-06-21 17:15:59 -070068
69 /* Initialize submodule for each IOC4 */
70 if (!is->is_probe)
Jes Sorensen6e586f32006-01-17 12:24:39 -050071 goto out;
Brent Casavant22329b52005-06-21 17:15:59 -070072
Brent Casavant22329b52005-06-21 17:15:59 -070073 list_for_each_entry(idd, &ioc4_devices, idd_list) {
74 if (is->is_probe(idd)) {
75 printk(KERN_WARNING
76 "%s: IOC4 submodule %s probe failed "
77 "for pci_dev %s",
Harvey Harrison6e574192008-04-29 00:59:20 -070078 __func__, module_name(is->is_owner),
Brent Casavant22329b52005-06-21 17:15:59 -070079 pci_name(idd->idd_pdev));
80 }
81 }
Jes Sorensen6e586f32006-01-17 12:24:39 -050082 out:
83 mutex_unlock(&ioc4_mutex);
Brent Casavant22329b52005-06-21 17:15:59 -070084 return 0;
85}
86
87/* Unregister an IOC4 submodule */
88void
89ioc4_unregister_submodule(struct ioc4_submodule *is)
90{
91 struct ioc4_driver_data *idd;
92
Jes Sorensen6e586f32006-01-17 12:24:39 -050093 mutex_lock(&ioc4_mutex);
Brent Casavant22329b52005-06-21 17:15:59 -070094 list_del(&is->is_list);
Brent Casavant22329b52005-06-21 17:15:59 -070095
96 /* Remove submodule for each IOC4 */
97 if (!is->is_remove)
Jes Sorensen6e586f32006-01-17 12:24:39 -050098 goto out;
Brent Casavant22329b52005-06-21 17:15:59 -070099
Brent Casavant22329b52005-06-21 17:15:59 -0700100 list_for_each_entry(idd, &ioc4_devices, idd_list) {
101 if (is->is_remove(idd)) {
102 printk(KERN_WARNING
103 "%s: IOC4 submodule %s remove failed "
104 "for pci_dev %s.\n",
Harvey Harrison6e574192008-04-29 00:59:20 -0700105 __func__, module_name(is->is_owner),
Brent Casavant22329b52005-06-21 17:15:59 -0700106 pci_name(idd->idd_pdev));
107 }
108 }
Jes Sorensen6e586f32006-01-17 12:24:39 -0500109 out:
110 mutex_unlock(&ioc4_mutex);
Brent Casavant22329b52005-06-21 17:15:59 -0700111}
112
113/*********************
114 * Device management *
115 *********************/
116
Brent Casavantd4c477c2005-06-21 17:16:01 -0700117#define IOC4_CALIBRATE_LOW_LIMIT \
118 (1000*IOC4_EXTINT_COUNT_DIVISOR/IOC4_CALIBRATE_LOW_MHZ)
119#define IOC4_CALIBRATE_HIGH_LIMIT \
120 (1000*IOC4_EXTINT_COUNT_DIVISOR/IOC4_CALIBRATE_HIGH_MHZ)
121#define IOC4_CALIBRATE_DEFAULT \
122 (1000*IOC4_EXTINT_COUNT_DIVISOR/IOC4_CALIBRATE_DEFAULT_MHZ)
123
124#define IOC4_CALIBRATE_END \
125 (IOC4_CALIBRATE_CYCLES + IOC4_CALIBRATE_DISCARD)
126
127#define IOC4_INT_OUT_MODE_TOGGLE 0x7 /* Toggle INT_OUT every COUNT+1 ticks */
128
129/* Determines external interrupt output clock period of the PCI bus an
130 * IOC4 is attached to. This value can be used to determine the PCI
131 * bus speed.
132 *
133 * IOC4 has a design feature that various internal timers are derived from
134 * the PCI bus clock. This causes IOC4 device drivers to need to take the
135 * bus speed into account when setting various register values (e.g. INT_OUT
136 * register COUNT field, UART divisors, etc). Since this information is
137 * needed by several subdrivers, it is determined by the main IOC4 driver,
138 * even though the following code utilizes external interrupt registers
139 * to perform the speed calculation.
140 */
Jean Delvare2ea5d352009-12-14 18:00:27 -0800141static void __devinit
Brent Casavantd4c477c2005-06-21 17:16:01 -0700142ioc4_clock_calibrate(struct ioc4_driver_data *idd)
143{
Brent Casavantd4c477c2005-06-21 17:16:01 -0700144 union ioc4_int_out int_out;
145 union ioc4_gpcr gpcr;
146 unsigned int state, last_state = 1;
Brent Casavant107d5a72006-10-17 00:09:24 -0700147 struct timespec start_ts, end_ts;
148 uint64_t start, end, period;
Brent Casavantd4c477c2005-06-21 17:16:01 -0700149 unsigned int count = 0;
150
151 /* Enable output */
152 gpcr.raw = 0;
153 gpcr.fields.dir = IOC4_GPCR_DIR_0;
154 gpcr.fields.int_out_en = 1;
155 writel(gpcr.raw, &idd->idd_misc_regs->gpcr_s.raw);
156
157 /* Reset to power-on state */
158 writel(0, &idd->idd_misc_regs->int_out.raw);
159 mmiowb();
160
Brent Casavantd4c477c2005-06-21 17:16:01 -0700161 /* Set up square wave */
162 int_out.raw = 0;
163 int_out.fields.count = IOC4_CALIBRATE_COUNT;
164 int_out.fields.mode = IOC4_INT_OUT_MODE_TOGGLE;
165 int_out.fields.diag = 0;
166 writel(int_out.raw, &idd->idd_misc_regs->int_out.raw);
167 mmiowb();
168
169 /* Check square wave period averaged over some number of cycles */
170 do {
171 int_out.raw = readl(&idd->idd_misc_regs->int_out.raw);
172 state = int_out.fields.int_out;
173 if (!last_state && state) {
174 count++;
175 if (count == IOC4_CALIBRATE_END) {
Brent Casavant107d5a72006-10-17 00:09:24 -0700176 ktime_get_ts(&end_ts);
Brent Casavantd4c477c2005-06-21 17:16:01 -0700177 break;
178 } else if (count == IOC4_CALIBRATE_DISCARD)
Brent Casavant107d5a72006-10-17 00:09:24 -0700179 ktime_get_ts(&start_ts);
Brent Casavantd4c477c2005-06-21 17:16:01 -0700180 }
181 last_state = state;
182 } while (1);
183
184 /* Calculation rearranged to preserve intermediate precision.
185 * Logically:
Brent Casavant107d5a72006-10-17 00:09:24 -0700186 * 1. "end - start" gives us the measurement period over all
187 * the square wave cycles.
188 * 2. Divide by number of square wave cycles to get the period
189 * of a square wave cycle.
Brent Casavantd4c477c2005-06-21 17:16:01 -0700190 * 3. Divide by 2*(int_out.fields.count+1), which is the formula
191 * by which the IOC4 generates the square wave, to get the
Brent Casavant107d5a72006-10-17 00:09:24 -0700192 * period of an IOC4 INT_OUT count.
Brent Casavantd4c477c2005-06-21 17:16:01 -0700193 */
Brent Casavant107d5a72006-10-17 00:09:24 -0700194 end = end_ts.tv_sec * NSEC_PER_SEC + end_ts.tv_nsec;
195 start = start_ts.tv_sec * NSEC_PER_SEC + start_ts.tv_nsec;
196 period = (end - start) /
197 (IOC4_CALIBRATE_CYCLES * 2 * (IOC4_CALIBRATE_COUNT + 1));
Brent Casavantd4c477c2005-06-21 17:16:01 -0700198
199 /* Bounds check the result. */
200 if (period > IOC4_CALIBRATE_LOW_LIMIT ||
201 period < IOC4_CALIBRATE_HIGH_LIMIT) {
Brent Casavantf5befce2006-06-23 02:05:52 -0700202 printk(KERN_INFO
203 "IOC4 %s: Clock calibration failed. Assuming"
204 "PCI clock is %d ns.\n",
205 pci_name(idd->idd_pdev),
Brent Casavantd4c477c2005-06-21 17:16:01 -0700206 IOC4_CALIBRATE_DEFAULT / IOC4_EXTINT_COUNT_DIVISOR);
207 period = IOC4_CALIBRATE_DEFAULT;
208 } else {
Brent Casavant59f14802006-10-17 00:09:25 -0700209 u64 ns = period;
210
211 do_div(ns, IOC4_EXTINT_COUNT_DIVISOR);
Brent Casavantf5befce2006-06-23 02:05:52 -0700212 printk(KERN_DEBUG
Randy Dunlap760fe9a2006-10-28 10:38:39 -0700213 "IOC4 %s: PCI clock is %llu ns.\n",
214 pci_name(idd->idd_pdev), (unsigned long long)ns);
Brent Casavantd4c477c2005-06-21 17:16:01 -0700215 }
216
217 /* Remember results. We store the extint clock period rather
218 * than the PCI clock period so that greater precision is
219 * retained. Divide by IOC4_EXTINT_COUNT_DIVISOR to get
220 * PCI clock period.
221 */
222 idd->count_period = period;
223}
224
Brent Casavantf5befce2006-06-23 02:05:52 -0700225/* There are three variants of IOC4 cards: IO9, IO10, and PCI-RT.
226 * Each brings out different combinations of IOC4 signals, thus.
227 * the IOC4 subdrivers need to know to which we're attached.
228 *
229 * We look for the presence of a SCSI (IO9) or SATA (IO10) controller
230 * on the same PCI bus at slot number 3 to differentiate IO9 from IO10.
231 * If neither is present, it's a PCI-RT.
232 */
Jean Delvare2ea5d352009-12-14 18:00:27 -0800233static unsigned int __devinit
Brent Casavantf5befce2006-06-23 02:05:52 -0700234ioc4_variant(struct ioc4_driver_data *idd)
235{
236 struct pci_dev *pdev = NULL;
237 int found = 0;
238
239 /* IO9: Look for a QLogic ISP 12160 at the same bus and slot 3. */
240 do {
241 pdev = pci_get_device(PCI_VENDOR_ID_QLOGIC,
242 PCI_DEVICE_ID_QLOGIC_ISP12160, pdev);
243 if (pdev &&
244 idd->idd_pdev->bus->number == pdev->bus->number &&
245 3 == PCI_SLOT(pdev->devfn))
246 found = 1;
Brent Casavantf5befce2006-06-23 02:05:52 -0700247 } while (pdev && !found);
Julia Lawall90d8dab2007-11-14 16:59:26 -0800248 if (NULL != pdev) {
249 pci_dev_put(pdev);
Brent Casavantf5befce2006-06-23 02:05:52 -0700250 return IOC4_VARIANT_IO9;
Julia Lawall90d8dab2007-11-14 16:59:26 -0800251 }
Brent Casavantf5befce2006-06-23 02:05:52 -0700252
253 /* IO10: Look for a Vitesse VSC 7174 at the same bus and slot 3. */
254 pdev = NULL;
255 do {
256 pdev = pci_get_device(PCI_VENDOR_ID_VITESSE,
257 PCI_DEVICE_ID_VITESSE_VSC7174, pdev);
258 if (pdev &&
259 idd->idd_pdev->bus->number == pdev->bus->number &&
260 3 == PCI_SLOT(pdev->devfn))
261 found = 1;
Brent Casavantf5befce2006-06-23 02:05:52 -0700262 } while (pdev && !found);
Julia Lawall90d8dab2007-11-14 16:59:26 -0800263 if (NULL != pdev) {
264 pci_dev_put(pdev);
Brent Casavantf5befce2006-06-23 02:05:52 -0700265 return IOC4_VARIANT_IO10;
Julia Lawall90d8dab2007-11-14 16:59:26 -0800266 }
Brent Casavantf5befce2006-06-23 02:05:52 -0700267
268 /* PCI-RT: No SCSI/SATA controller will be present */
269 return IOC4_VARIANT_PCI_RT;
270}
271
Jean Delvare2ea5d352009-12-14 18:00:27 -0800272static void __devinit
Brent Casavant08adefd2009-01-06 14:41:06 -0800273ioc4_load_modules(struct work_struct *work)
274{
275 /* arg just has to be freed */
276
277 request_module("sgiioc4");
278
279 kfree(work);
280}
281
Brent Casavant22329b52005-06-21 17:15:59 -0700282/* Adds a new instance of an IOC4 card */
Jean Delvare2ea5d352009-12-14 18:00:27 -0800283static int __devinit
Brent Casavant22329b52005-06-21 17:15:59 -0700284ioc4_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
285{
286 struct ioc4_driver_data *idd;
287 struct ioc4_submodule *is;
288 uint32_t pcmd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 int ret;
290
Brent Casavant22329b52005-06-21 17:15:59 -0700291 /* Enable IOC4 and take ownership of it */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 if ((ret = pci_enable_device(pdev))) {
293 printk(KERN_WARNING
Brent Casavant22329b52005-06-21 17:15:59 -0700294 "%s: Failed to enable IOC4 device for pci_dev %s.\n",
Harvey Harrison6e574192008-04-29 00:59:20 -0700295 __func__, pci_name(pdev));
Brent Casavant22329b52005-06-21 17:15:59 -0700296 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 }
298 pci_set_master(pdev);
299
Brent Casavant22329b52005-06-21 17:15:59 -0700300 /* Set up per-IOC4 data */
301 idd = kmalloc(sizeof(struct ioc4_driver_data), GFP_KERNEL);
302 if (!idd) {
303 printk(KERN_WARNING
304 "%s: Failed to allocate IOC4 data for pci_dev %s.\n",
Harvey Harrison6e574192008-04-29 00:59:20 -0700305 __func__, pci_name(pdev));
Brent Casavant22329b52005-06-21 17:15:59 -0700306 ret = -ENODEV;
307 goto out_idd;
308 }
309 idd->idd_pdev = pdev;
310 idd->idd_pci_id = pci_id;
311
312 /* Map IOC4 misc registers. These are shared between subdevices
313 * so the main IOC4 module manages them.
314 */
315 idd->idd_bar0 = pci_resource_start(idd->idd_pdev, 0);
316 if (!idd->idd_bar0) {
317 printk(KERN_WARNING
318 "%s: Unable to find IOC4 misc resource "
319 "for pci_dev %s.\n",
Harvey Harrison6e574192008-04-29 00:59:20 -0700320 __func__, pci_name(idd->idd_pdev));
Brent Casavant22329b52005-06-21 17:15:59 -0700321 ret = -ENODEV;
322 goto out_pci;
323 }
Brent Casavant52c9ae02007-02-10 01:44:46 -0800324 if (!request_mem_region(idd->idd_bar0, sizeof(struct ioc4_misc_regs),
Brent Casavant22329b52005-06-21 17:15:59 -0700325 "ioc4_misc")) {
326 printk(KERN_WARNING
327 "%s: Unable to request IOC4 misc region "
328 "for pci_dev %s.\n",
Harvey Harrison6e574192008-04-29 00:59:20 -0700329 __func__, pci_name(idd->idd_pdev));
Brent Casavant22329b52005-06-21 17:15:59 -0700330 ret = -ENODEV;
331 goto out_pci;
332 }
333 idd->idd_misc_regs = ioremap(idd->idd_bar0,
334 sizeof(struct ioc4_misc_regs));
335 if (!idd->idd_misc_regs) {
336 printk(KERN_WARNING
337 "%s: Unable to remap IOC4 misc region "
338 "for pci_dev %s.\n",
Harvey Harrison6e574192008-04-29 00:59:20 -0700339 __func__, pci_name(idd->idd_pdev));
Brent Casavant22329b52005-06-21 17:15:59 -0700340 ret = -ENODEV;
341 goto out_misc_region;
342 }
343
344 /* Failsafe portion of per-IOC4 initialization */
345
Brent Casavantf5befce2006-06-23 02:05:52 -0700346 /* Detect card variant */
347 idd->idd_variant = ioc4_variant(idd);
348 printk(KERN_INFO "IOC4 %s: %s card detected.\n", pci_name(pdev),
349 idd->idd_variant == IOC4_VARIANT_IO9 ? "IO9" :
350 idd->idd_variant == IOC4_VARIANT_PCI_RT ? "PCI-RT" :
351 idd->idd_variant == IOC4_VARIANT_IO10 ? "IO10" : "unknown");
352
Brent Casavant22329b52005-06-21 17:15:59 -0700353 /* Initialize IOC4 */
354 pci_read_config_dword(idd->idd_pdev, PCI_COMMAND, &pcmd);
355 pci_write_config_dword(idd->idd_pdev, PCI_COMMAND,
356 pcmd | PCI_COMMAND_PARITY | PCI_COMMAND_SERR);
357
Brent Casavantd4c477c2005-06-21 17:16:01 -0700358 /* Determine PCI clock */
359 ioc4_clock_calibrate(idd);
360
Brent Casavant22329b52005-06-21 17:15:59 -0700361 /* Disable/clear all interrupts. Need to do this here lest
362 * one submodule request the shared IOC4 IRQ, but interrupt
363 * is generated by a different subdevice.
364 */
365 /* Disable */
366 writel(~0, &idd->idd_misc_regs->other_iec.raw);
367 writel(~0, &idd->idd_misc_regs->sio_iec);
368 /* Clear (i.e. acknowledge) */
369 writel(~0, &idd->idd_misc_regs->other_ir.raw);
370 writel(~0, &idd->idd_misc_regs->sio_ir);
371
372 /* Track PCI-device specific data */
373 idd->idd_serial_data = NULL;
374 pci_set_drvdata(idd->idd_pdev, idd);
Jes Sorensen6e586f32006-01-17 12:24:39 -0500375
376 mutex_lock(&ioc4_mutex);
Brent Casavant8683dc92006-05-03 19:55:10 -0700377 list_add_tail(&idd->idd_list, &ioc4_devices);
Brent Casavant22329b52005-06-21 17:15:59 -0700378
379 /* Add this IOC4 to all submodules */
Brent Casavant22329b52005-06-21 17:15:59 -0700380 list_for_each_entry(is, &ioc4_submodules, is_list) {
381 if (is->is_probe && is->is_probe(idd)) {
382 printk(KERN_WARNING
383 "%s: IOC4 submodule 0x%s probe failed "
384 "for pci_dev %s.\n",
Harvey Harrison6e574192008-04-29 00:59:20 -0700385 __func__, module_name(is->is_owner),
Brent Casavant22329b52005-06-21 17:15:59 -0700386 pci_name(idd->idd_pdev));
387 }
388 }
Jes Sorensen6e586f32006-01-17 12:24:39 -0500389 mutex_unlock(&ioc4_mutex);
Brent Casavant22329b52005-06-21 17:15:59 -0700390
Brent Casavant08adefd2009-01-06 14:41:06 -0800391 /* Request sgiioc4 IDE driver on boards that bring that functionality
392 * off of IOC4. The root filesystem may be hosted on a drive connected
393 * to IOC4, so we need to make sure the sgiioc4 driver is loaded as it
394 * won't be picked up by modprobes due to the ioc4 module owning the
395 * PCI device.
396 */
397 if (idd->idd_variant != IOC4_VARIANT_PCI_RT) {
398 struct work_struct *work;
399 work = kzalloc(sizeof(struct work_struct), GFP_KERNEL);
400 if (!work) {
401 printk(KERN_WARNING
402 "%s: IOC4 unable to allocate memory for "
403 "load of sub-modules.\n", __func__);
404 } else {
405 /* Request the module from a work procedure as the
406 * modprobe goes out to a userland helper and that
407 * will hang if done directly from ioc4_probe().
408 */
409 printk(KERN_INFO "IOC4 loading sgiioc4 submodule\n");
410 INIT_WORK(work, ioc4_load_modules);
411 schedule_work(work);
412 }
413 }
414
Brent Casavant22329b52005-06-21 17:15:59 -0700415 return 0;
416
417out_misc_region:
Brent Casavant52c9ae02007-02-10 01:44:46 -0800418 release_mem_region(idd->idd_bar0, sizeof(struct ioc4_misc_regs));
Brent Casavant22329b52005-06-21 17:15:59 -0700419out_pci:
420 kfree(idd);
421out_idd:
422 pci_disable_device(pdev);
423out:
424 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425}
426
Brent Casavant22329b52005-06-21 17:15:59 -0700427/* Removes a particular instance of an IOC4 card. */
Jean Delvare2ea5d352009-12-14 18:00:27 -0800428static void __devexit
Brent Casavant22329b52005-06-21 17:15:59 -0700429ioc4_remove(struct pci_dev *pdev)
430{
431 struct ioc4_submodule *is;
432 struct ioc4_driver_data *idd;
433
434 idd = pci_get_drvdata(pdev);
435
436 /* Remove this IOC4 from all submodules */
Jes Sorensen6e586f32006-01-17 12:24:39 -0500437 mutex_lock(&ioc4_mutex);
Brent Casavant22329b52005-06-21 17:15:59 -0700438 list_for_each_entry(is, &ioc4_submodules, is_list) {
439 if (is->is_remove && is->is_remove(idd)) {
440 printk(KERN_WARNING
441 "%s: IOC4 submodule 0x%s remove failed "
442 "for pci_dev %s.\n",
Harvey Harrison6e574192008-04-29 00:59:20 -0700443 __func__, module_name(is->is_owner),
Brent Casavant22329b52005-06-21 17:15:59 -0700444 pci_name(idd->idd_pdev));
445 }
446 }
Jes Sorensen6e586f32006-01-17 12:24:39 -0500447 mutex_unlock(&ioc4_mutex);
Brent Casavant22329b52005-06-21 17:15:59 -0700448
449 /* Release resources */
450 iounmap(idd->idd_misc_regs);
451 if (!idd->idd_bar0) {
452 printk(KERN_WARNING
453 "%s: Unable to get IOC4 misc mapping for pci_dev %s. "
454 "Device removal may be incomplete.\n",
Harvey Harrison6e574192008-04-29 00:59:20 -0700455 __func__, pci_name(idd->idd_pdev));
Brent Casavant22329b52005-06-21 17:15:59 -0700456 }
Brent Casavant52c9ae02007-02-10 01:44:46 -0800457 release_mem_region(idd->idd_bar0, sizeof(struct ioc4_misc_regs));
Brent Casavant22329b52005-06-21 17:15:59 -0700458
459 /* Disable IOC4 and relinquish */
460 pci_disable_device(pdev);
461
462 /* Remove and free driver data */
Jes Sorensen6e586f32006-01-17 12:24:39 -0500463 mutex_lock(&ioc4_mutex);
Brent Casavant22329b52005-06-21 17:15:59 -0700464 list_del(&idd->idd_list);
Jes Sorensen6e586f32006-01-17 12:24:39 -0500465 mutex_unlock(&ioc4_mutex);
Brent Casavant22329b52005-06-21 17:15:59 -0700466 kfree(idd);
467}
468
469static struct pci_device_id ioc4_id_table[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 {PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC4, PCI_ANY_ID,
471 PCI_ANY_ID, 0x0b4000, 0xFFFFFF},
472 {0}
473};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474
Dave Jones85bd8432006-06-29 02:24:31 -0700475static struct pci_driver ioc4_driver = {
Brent Casavant22329b52005-06-21 17:15:59 -0700476 .name = "IOC4",
477 .id_table = ioc4_id_table,
478 .probe = ioc4_probe,
Jean Delvare2ea5d352009-12-14 18:00:27 -0800479 .remove = __devexit_p(ioc4_remove),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480};
481
Brent Casavant22329b52005-06-21 17:15:59 -0700482MODULE_DEVICE_TABLE(pci, ioc4_id_table);
483
484/*********************
485 * Module management *
486 *********************/
487
488/* Module load */
Jean Delvare2ea5d352009-12-14 18:00:27 -0800489static int __init
Brent Casavant22329b52005-06-21 17:15:59 -0700490ioc4_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491{
Brent Casavant22329b52005-06-21 17:15:59 -0700492 return pci_register_driver(&ioc4_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494
Brent Casavant22329b52005-06-21 17:15:59 -0700495/* Module unload */
Jean Delvare2ea5d352009-12-14 18:00:27 -0800496static void __exit
Brent Casavant22329b52005-06-21 17:15:59 -0700497ioc4_exit(void)
498{
Brent Casavant08adefd2009-01-06 14:41:06 -0800499 /* Ensure ioc4_load_modules() has completed before exiting */
500 flush_scheduled_work();
Brent Casavant22329b52005-06-21 17:15:59 -0700501 pci_unregister_driver(&ioc4_driver);
502}
503
504module_init(ioc4_init);
505module_exit(ioc4_exit);
506
507MODULE_AUTHOR("Brent Casavant - Silicon Graphics, Inc. <bcasavan@sgi.com>");
508MODULE_DESCRIPTION("PCI driver master module for SGI IOC4 Base-IO Card");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509MODULE_LICENSE("GPL");
Brent Casavant22329b52005-06-21 17:15:59 -0700510
511EXPORT_SYMBOL(ioc4_register_submodule);
512EXPORT_SYMBOL(ioc4_unregister_submodule);