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-rw-r--r--drivers/sn/ioc4.c290
1 files changed, 262 insertions, 28 deletions
diff --git a/drivers/sn/ioc4.c b/drivers/sn/ioc4.c
index d9e4ee280e5f..70862d72ea9d 100644
--- a/drivers/sn/ioc4.c
+++ b/drivers/sn/ioc4.c
@@ -6,60 +6,294 @@
6 * Copyright (C) 2005 Silicon Graphics, Inc. All Rights Reserved. 6 * Copyright (C) 2005 Silicon Graphics, Inc. All Rights Reserved.
7 */ 7 */
8 8
9/* 9/* This file contains the master driver module for use by SGI IOC4 subdrivers.
10 * This file contains a shim driver for the IOC4 IDE and serial drivers. 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.
11 */ 26 */
12 27
13#include <linux/errno.h> 28#include <linux/errno.h>
14#include <linux/module.h> 29#include <linux/module.h>
15#include <linux/pci.h> 30#include <linux/pci.h>
16#include <linux/ioc4_common.h> 31#include <linux/ioc4.h>
17#include <linux/ide.h> 32#include <linux/rwsem.h>
18 33
34/************************
35 * Submodule management *
36 ************************/
19 37
20static int __devinit 38static LIST_HEAD(ioc4_devices);
21ioc4_probe_one(struct pci_dev *pdev, const struct pci_device_id *pci_id) 39static DECLARE_RWSEM(ioc4_devices_rwsem);
40
41static LIST_HEAD(ioc4_submodules);
42static DECLARE_RWSEM(ioc4_submodules_rwsem);
43
44/* Register an IOC4 submodule */
45int
46ioc4_register_submodule(struct ioc4_submodule *is)
47{
48 struct ioc4_driver_data *idd;
49
50 down_write(&ioc4_submodules_rwsem);
51 list_add(&is->is_list, &ioc4_submodules);
52 up_write(&ioc4_submodules_rwsem);
53
54 /* Initialize submodule for each IOC4 */
55 if (!is->is_probe)
56 return 0;
57
58 down_read(&ioc4_devices_rwsem);
59 list_for_each_entry(idd, &ioc4_devices, idd_list) {
60 if (is->is_probe(idd)) {
61 printk(KERN_WARNING
62 "%s: IOC4 submodule %s probe failed "
63 "for pci_dev %s",
64 __FUNCTION__, module_name(is->is_owner),
65 pci_name(idd->idd_pdev));
66 }
67 }
68 up_read(&ioc4_devices_rwsem);
69
70 return 0;
71}
72
73/* Unregister an IOC4 submodule */
74void
75ioc4_unregister_submodule(struct ioc4_submodule *is)
22{ 76{
77 struct ioc4_driver_data *idd;
78
79 down_write(&ioc4_submodules_rwsem);
80 list_del(&is->is_list);
81 up_write(&ioc4_submodules_rwsem);
82
83 /* Remove submodule for each IOC4 */
84 if (!is->is_remove)
85 return;
86
87 down_read(&ioc4_devices_rwsem);
88 list_for_each_entry(idd, &ioc4_devices, idd_list) {
89 if (is->is_remove(idd)) {
90 printk(KERN_WARNING
91 "%s: IOC4 submodule %s remove failed "
92 "for pci_dev %s.\n",
93 __FUNCTION__, module_name(is->is_owner),
94 pci_name(idd->idd_pdev));
95 }
96 }
97 up_read(&ioc4_devices_rwsem);
98}
99
100/*********************
101 * Device management *
102 *********************/
103
104/* Adds a new instance of an IOC4 card */
105static int
106ioc4_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
107{
108 struct ioc4_driver_data *idd;
109 struct ioc4_submodule *is;
110 uint32_t pcmd;
23 int ret; 111 int ret;
24 112
113 /* Enable IOC4 and take ownership of it */
25 if ((ret = pci_enable_device(pdev))) { 114 if ((ret = pci_enable_device(pdev))) {
26 printk(KERN_WARNING 115 printk(KERN_WARNING
27 "%s: Failed to enable device with " 116 "%s: Failed to enable IOC4 device for pci_dev %s.\n",
28 "pci_dev 0x%p... returning\n", 117 __FUNCTION__, pci_name(pdev));
29 __FUNCTION__, (void *)pdev); 118 goto out;
30 return ret;
31 } 119 }
32 pci_set_master(pdev); 120 pci_set_master(pdev);
33 121
34 /* attach each sub-device */ 122 /* Set up per-IOC4 data */
35 ret = ioc4_ide_attach_one(pdev, pci_id); 123 idd = kmalloc(sizeof(struct ioc4_driver_data), GFP_KERNEL);
36 if (ret) 124 if (!idd) {
37 return ret; 125 printk(KERN_WARNING
38 return ioc4_serial_attach_one(pdev, pci_id); 126 "%s: Failed to allocate IOC4 data for pci_dev %s.\n",
127 __FUNCTION__, pci_name(pdev));
128 ret = -ENODEV;
129 goto out_idd;
130 }
131 idd->idd_pdev = pdev;
132 idd->idd_pci_id = pci_id;
133
134 /* Map IOC4 misc registers. These are shared between subdevices
135 * so the main IOC4 module manages them.
136 */
137 idd->idd_bar0 = pci_resource_start(idd->idd_pdev, 0);
138 if (!idd->idd_bar0) {
139 printk(KERN_WARNING
140 "%s: Unable to find IOC4 misc resource "
141 "for pci_dev %s.\n",
142 __FUNCTION__, pci_name(idd->idd_pdev));
143 ret = -ENODEV;
144 goto out_pci;
145 }
146 if (!request_region(idd->idd_bar0, sizeof(struct ioc4_misc_regs),
147 "ioc4_misc")) {
148 printk(KERN_WARNING
149 "%s: Unable to request IOC4 misc region "
150 "for pci_dev %s.\n",
151 __FUNCTION__, pci_name(idd->idd_pdev));
152 ret = -ENODEV;
153 goto out_pci;
154 }
155 idd->idd_misc_regs = ioremap(idd->idd_bar0,
156 sizeof(struct ioc4_misc_regs));
157 if (!idd->idd_misc_regs) {
158 printk(KERN_WARNING
159 "%s: Unable to remap IOC4 misc region "
160 "for pci_dev %s.\n",
161 __FUNCTION__, pci_name(idd->idd_pdev));
162 ret = -ENODEV;
163 goto out_misc_region;
164 }
165
166 /* Failsafe portion of per-IOC4 initialization */
167
168 /* Initialize IOC4 */
169 pci_read_config_dword(idd->idd_pdev, PCI_COMMAND, &pcmd);
170 pci_write_config_dword(idd->idd_pdev, PCI_COMMAND,
171 pcmd | PCI_COMMAND_PARITY | PCI_COMMAND_SERR);
172
173 /* Disable/clear all interrupts. Need to do this here lest
174 * one submodule request the shared IOC4 IRQ, but interrupt
175 * is generated by a different subdevice.
176 */
177 /* Disable */
178 writel(~0, &idd->idd_misc_regs->other_iec.raw);
179 writel(~0, &idd->idd_misc_regs->sio_iec);
180 /* Clear (i.e. acknowledge) */
181 writel(~0, &idd->idd_misc_regs->other_ir.raw);
182 writel(~0, &idd->idd_misc_regs->sio_ir);
183
184 /* Track PCI-device specific data */
185 idd->idd_serial_data = NULL;
186 pci_set_drvdata(idd->idd_pdev, idd);
187 down_write(&ioc4_devices_rwsem);
188 list_add(&idd->idd_list, &ioc4_devices);
189 up_write(&ioc4_devices_rwsem);
190
191 /* Add this IOC4 to all submodules */
192 down_read(&ioc4_submodules_rwsem);
193 list_for_each_entry(is, &ioc4_submodules, is_list) {
194 if (is->is_probe && is->is_probe(idd)) {
195 printk(KERN_WARNING
196 "%s: IOC4 submodule 0x%s probe failed "
197 "for pci_dev %s.\n",
198 __FUNCTION__, module_name(is->is_owner),
199 pci_name(idd->idd_pdev));
200 }
201 }
202 up_read(&ioc4_submodules_rwsem);
203
204 return 0;
205
206out_misc_region:
207 release_region(idd->idd_bar0, sizeof(struct ioc4_misc_regs));
208out_pci:
209 kfree(idd);
210out_idd:
211 pci_disable_device(pdev);
212out:
213 return ret;
39} 214}
40 215
41/* pci device struct */ 216/* Removes a particular instance of an IOC4 card. */
42static struct pci_device_id ioc4_s_id_table[] = { 217static void
218ioc4_remove(struct pci_dev *pdev)
219{
220 struct ioc4_submodule *is;
221 struct ioc4_driver_data *idd;
222
223 idd = pci_get_drvdata(pdev);
224
225 /* Remove this IOC4 from all submodules */
226 down_read(&ioc4_submodules_rwsem);
227 list_for_each_entry(is, &ioc4_submodules, is_list) {
228 if (is->is_remove && is->is_remove(idd)) {
229 printk(KERN_WARNING
230 "%s: IOC4 submodule 0x%s remove failed "
231 "for pci_dev %s.\n",
232 __FUNCTION__, module_name(is->is_owner),
233 pci_name(idd->idd_pdev));
234 }
235 }
236 up_read(&ioc4_submodules_rwsem);
237
238 /* Release resources */
239 iounmap(idd->idd_misc_regs);
240 if (!idd->idd_bar0) {
241 printk(KERN_WARNING
242 "%s: Unable to get IOC4 misc mapping for pci_dev %s. "
243 "Device removal may be incomplete.\n",
244 __FUNCTION__, pci_name(idd->idd_pdev));
245 }
246 release_region(idd->idd_bar0, sizeof(struct ioc4_misc_regs));
247
248 /* Disable IOC4 and relinquish */
249 pci_disable_device(pdev);
250
251 /* Remove and free driver data */
252 down_write(&ioc4_devices_rwsem);
253 list_del(&idd->idd_list);
254 up_write(&ioc4_devices_rwsem);
255 kfree(idd);
256}
257
258static struct pci_device_id ioc4_id_table[] = {
43 {PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC4, PCI_ANY_ID, 259 {PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC4, PCI_ANY_ID,
44 PCI_ANY_ID, 0x0b4000, 0xFFFFFF}, 260 PCI_ANY_ID, 0x0b4000, 0xFFFFFF},
45 {0} 261 {0}
46}; 262};
47MODULE_DEVICE_TABLE(pci, ioc4_s_id_table);
48 263
49static struct pci_driver __devinitdata ioc4_s_driver = { 264static struct pci_driver __devinitdata ioc4_driver = {
50 .name = "IOC4", 265 .name = "IOC4",
51 .id_table = ioc4_s_id_table, 266 .id_table = ioc4_id_table,
52 .probe = ioc4_probe_one, 267 .probe = ioc4_probe,
268 .remove = ioc4_remove,
53}; 269};
54 270
55static int __devinit ioc4_detect(void) 271MODULE_DEVICE_TABLE(pci, ioc4_id_table);
272
273/*********************
274 * Module management *
275 *********************/
276
277/* Module load */
278static int __devinit
279ioc4_init(void)
56{ 280{
57 ioc4_serial_init(); 281 return pci_register_driver(&ioc4_driver);
282}
58 283
59 return pci_register_driver(&ioc4_s_driver); 284/* Module unload */
285static void __devexit
286ioc4_exit(void)
287{
288 pci_unregister_driver(&ioc4_driver);
60} 289}
61module_init(ioc4_detect);
62 290
63MODULE_AUTHOR("Pat Gefre - Silicon Graphics Inc. (SGI) <pfg@sgi.com>"); 291module_init(ioc4_init);
64MODULE_DESCRIPTION("PCI driver module for SGI IOC4 Base-IO Card"); 292module_exit(ioc4_exit);
293
294MODULE_AUTHOR("Brent Casavant - Silicon Graphics, Inc. <bcasavan@sgi.com>");
295MODULE_DESCRIPTION("PCI driver master module for SGI IOC4 Base-IO Card");
65MODULE_LICENSE("GPL"); 296MODULE_LICENSE("GPL");
297
298EXPORT_SYMBOL(ioc4_register_submodule);
299EXPORT_SYMBOL(ioc4_unregister_submodule);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-16 12:22:47 -0500