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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * PCI handling of I2O controller | |
3 | * | |
4 | * Copyright (C) 1999-2002 Red Hat Software | |
5 | * | |
6 | * Written by Alan Cox, Building Number Three Ltd | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | * | |
13 | * A lot of the I2O message side code from this is taken from the Red | |
14 | * Creek RCPCI45 adapter driver by Red Creek Communications | |
15 | * | |
16 | * Fixes/additions: | |
17 | * Philipp Rumpf | |
96de0e25 JE |
18 | * Juha Sievänen <Juha.Sievanen@cs.Helsinki.FI> |
19 | * Auvo Häkkinen <Auvo.Hakkinen@cs.Helsinki.FI> | |
1da177e4 LT |
20 | * Deepak Saxena <deepak@plexity.net> |
21 | * Boji T Kannanthanam <boji.t.kannanthanam@intel.com> | |
f1b11e50 | 22 | * Alan Cox <alan@lxorguk.ukuu.org.uk>: |
1da177e4 LT |
23 | * Ported to Linux 2.5. |
24 | * Markus Lidel <Markus.Lidel@shadowconnect.com>: | |
25 | * Minor fixes for 2.6. | |
26 | * Markus Lidel <Markus.Lidel@shadowconnect.com>: | |
27 | * Support for sysfs included. | |
28 | */ | |
29 | ||
30 | #include <linux/pci.h> | |
31 | #include <linux/interrupt.h> | |
5a0e3ad6 | 32 | #include <linux/slab.h> |
1da177e4 | 33 | #include <linux/i2o.h> |
314ef9cb | 34 | #include <linux/module.h> |
9e87545f | 35 | #include "core.h" |
1da177e4 | 36 | |
dc9352a4 ML |
37 | #define OSM_DESCRIPTION "I2O-subsystem" |
38 | ||
1da177e4 LT |
39 | /* PCI device id table for all I2O controllers */ |
40 | static struct pci_device_id __devinitdata i2o_pci_ids[] = { | |
41 | {PCI_DEVICE_CLASS(PCI_CLASS_INTELLIGENT_I2O << 8, 0xffff00)}, | |
42 | {PCI_DEVICE(PCI_VENDOR_ID_DPT, 0xa511)}, | |
61fbfa81 ML |
43 | {.vendor = PCI_VENDOR_ID_INTEL,.device = 0x1962, |
44 | .subvendor = PCI_VENDOR_ID_PROMISE,.subdevice = PCI_ANY_ID}, | |
1da177e4 LT |
45 | {0} |
46 | }; | |
47 | ||
1da177e4 LT |
48 | /** |
49 | * i2o_pci_free - Frees the DMA memory for the I2O controller | |
50 | * @c: I2O controller to free | |
51 | * | |
52 | * Remove all allocated DMA memory and unmap memory IO regions. If MTRR | |
53 | * is enabled, also remove it again. | |
54 | */ | |
55 | static void i2o_pci_free(struct i2o_controller *c) | |
56 | { | |
57 | struct device *dev; | |
58 | ||
59 | dev = &c->pdev->dev; | |
60 | ||
61 | i2o_dma_free(dev, &c->out_queue); | |
62 | i2o_dma_free(dev, &c->status_block); | |
f88e119c | 63 | kfree(c->lct); |
1da177e4 LT |
64 | i2o_dma_free(dev, &c->dlct); |
65 | i2o_dma_free(dev, &c->hrt); | |
66 | i2o_dma_free(dev, &c->status); | |
67 | ||
1da177e4 LT |
68 | if (c->raptor && c->in_queue.virt) |
69 | iounmap(c->in_queue.virt); | |
70 | ||
71 | if (c->base.virt) | |
72 | iounmap(c->base.virt); | |
dc9352a4 ML |
73 | |
74 | pci_release_regions(c->pdev); | |
1da177e4 LT |
75 | } |
76 | ||
77 | /** | |
78 | * i2o_pci_alloc - Allocate DMA memory, map IO memory for I2O controller | |
79 | * @c: I2O controller | |
80 | * | |
81 | * Allocate DMA memory for a PCI (or in theory AGP) I2O controller. All | |
82 | * IO mappings are also done here. If MTRR is enabled, also do add memory | |
83 | * regions here. | |
84 | * | |
85 | * Returns 0 on success or negative error code on failure. | |
86 | */ | |
87 | static int __devinit i2o_pci_alloc(struct i2o_controller *c) | |
88 | { | |
89 | struct pci_dev *pdev = c->pdev; | |
90 | struct device *dev = &pdev->dev; | |
91 | int i; | |
92 | ||
15d8ec7d ML |
93 | if (pci_request_regions(pdev, OSM_DESCRIPTION)) { |
94 | printk(KERN_ERR "%s: device already claimed\n", c->name); | |
95 | return -ENODEV; | |
96 | } | |
97 | ||
1da177e4 LT |
98 | for (i = 0; i < 6; i++) { |
99 | /* Skip I/O spaces */ | |
100 | if (!(pci_resource_flags(pdev, i) & IORESOURCE_IO)) { | |
101 | if (!c->base.phys) { | |
102 | c->base.phys = pci_resource_start(pdev, i); | |
103 | c->base.len = pci_resource_len(pdev, i); | |
104 | ||
105 | /* | |
106 | * If we know what card it is, set the size | |
107 | * correctly. Code is taken from dpt_i2o.c | |
108 | */ | |
109 | if (pdev->device == 0xa501) { | |
110 | if (pdev->subsystem_device >= 0xc032 && | |
111 | pdev->subsystem_device <= 0xc03b) { | |
112 | if (c->base.len > 0x400000) | |
113 | c->base.len = 0x400000; | |
114 | } else { | |
115 | if (c->base.len > 0x100000) | |
116 | c->base.len = 0x100000; | |
117 | } | |
118 | } | |
119 | if (!c->raptor) | |
120 | break; | |
121 | } else { | |
122 | c->in_queue.phys = pci_resource_start(pdev, i); | |
123 | c->in_queue.len = pci_resource_len(pdev, i); | |
124 | break; | |
125 | } | |
126 | } | |
127 | } | |
128 | ||
129 | if (i == 6) { | |
130 | printk(KERN_ERR "%s: I2O controller has no memory regions" | |
131 | " defined.\n", c->name); | |
132 | i2o_pci_free(c); | |
133 | return -EINVAL; | |
134 | } | |
135 | ||
136 | /* Map the I2O controller */ | |
137 | if (c->raptor) { | |
138 | printk(KERN_INFO "%s: PCI I2O controller\n", c->name); | |
139 | printk(KERN_INFO " BAR0 at 0x%08lX size=%ld\n", | |
140 | (unsigned long)c->base.phys, (unsigned long)c->base.len); | |
141 | printk(KERN_INFO " BAR1 at 0x%08lX size=%ld\n", | |
142 | (unsigned long)c->in_queue.phys, | |
143 | (unsigned long)c->in_queue.len); | |
144 | } else | |
145 | printk(KERN_INFO "%s: PCI I2O controller at %08lX size=%ld\n", | |
146 | c->name, (unsigned long)c->base.phys, | |
147 | (unsigned long)c->base.len); | |
148 | ||
61fbfa81 | 149 | c->base.virt = ioremap_nocache(c->base.phys, c->base.len); |
1da177e4 LT |
150 | if (!c->base.virt) { |
151 | printk(KERN_ERR "%s: Unable to map controller.\n", c->name); | |
dc9352a4 | 152 | i2o_pci_free(c); |
1da177e4 LT |
153 | return -ENOMEM; |
154 | } | |
155 | ||
156 | if (c->raptor) { | |
61fbfa81 ML |
157 | c->in_queue.virt = |
158 | ioremap_nocache(c->in_queue.phys, c->in_queue.len); | |
1da177e4 LT |
159 | if (!c->in_queue.virt) { |
160 | printk(KERN_ERR "%s: Unable to map controller.\n", | |
161 | c->name); | |
162 | i2o_pci_free(c); | |
163 | return -ENOMEM; | |
164 | } | |
165 | } else | |
166 | c->in_queue = c->base; | |
167 | ||
f10378ff | 168 | c->irq_status = c->base.virt + I2O_IRQ_STATUS; |
f88e119c ML |
169 | c->irq_mask = c->base.virt + I2O_IRQ_MASK; |
170 | c->in_port = c->base.virt + I2O_IN_PORT; | |
171 | c->out_port = c->base.virt + I2O_OUT_PORT; | |
1da177e4 | 172 | |
8b3e09e1 ML |
173 | /* Motorola/Freescale chip does not follow spec */ |
174 | if (pdev->vendor == PCI_VENDOR_ID_MOTOROLA && pdev->device == 0x18c0) { | |
175 | /* Check if CPU is enabled */ | |
176 | if (be32_to_cpu(readl(c->base.virt + 0x10000)) & 0x10000000) { | |
177 | printk(KERN_INFO "%s: MPC82XX needs CPU running to " | |
178 | "service I2O.\n", c->name); | |
179 | i2o_pci_free(c); | |
180 | return -ENODEV; | |
181 | } else { | |
182 | c->irq_status += I2O_MOTOROLA_PORT_OFFSET; | |
183 | c->irq_mask += I2O_MOTOROLA_PORT_OFFSET; | |
184 | c->in_port += I2O_MOTOROLA_PORT_OFFSET; | |
185 | c->out_port += I2O_MOTOROLA_PORT_OFFSET; | |
186 | printk(KERN_INFO "%s: MPC82XX workarounds activated.\n", | |
187 | c->name); | |
188 | } | |
189 | } | |
190 | ||
9d793b0b | 191 | if (i2o_dma_alloc(dev, &c->status, 8)) { |
1da177e4 LT |
192 | i2o_pci_free(c); |
193 | return -ENOMEM; | |
194 | } | |
195 | ||
9d793b0b | 196 | if (i2o_dma_alloc(dev, &c->hrt, sizeof(i2o_hrt))) { |
1da177e4 LT |
197 | i2o_pci_free(c); |
198 | return -ENOMEM; | |
199 | } | |
200 | ||
9d793b0b | 201 | if (i2o_dma_alloc(dev, &c->dlct, 8192)) { |
1da177e4 LT |
202 | i2o_pci_free(c); |
203 | return -ENOMEM; | |
204 | } | |
205 | ||
9d793b0b | 206 | if (i2o_dma_alloc(dev, &c->status_block, sizeof(i2o_status_block))) { |
1da177e4 LT |
207 | i2o_pci_free(c); |
208 | return -ENOMEM; | |
209 | } | |
210 | ||
9d793b0b AC |
211 | if (i2o_dma_alloc(dev, &c->out_queue, |
212 | I2O_MAX_OUTBOUND_MSG_FRAMES * I2O_OUTBOUND_MSG_FRAME_SIZE * | |
213 | sizeof(u32))) { | |
1da177e4 LT |
214 | i2o_pci_free(c); |
215 | return -ENOMEM; | |
216 | } | |
217 | ||
218 | pci_set_drvdata(pdev, c); | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
223 | /** | |
224 | * i2o_pci_interrupt - Interrupt handler for I2O controller | |
225 | * @irq: interrupt line | |
226 | * @dev_id: pointer to the I2O controller | |
1da177e4 LT |
227 | * |
228 | * Handle an interrupt from a PCI based I2O controller. This turns out | |
229 | * to be rather simple. We keep the controller pointer in the cookie. | |
230 | */ | |
7d12e780 | 231 | static irqreturn_t i2o_pci_interrupt(int irq, void *dev_id) |
1da177e4 LT |
232 | { |
233 | struct i2o_controller *c = dev_id; | |
f10378ff ML |
234 | u32 m; |
235 | irqreturn_t rc = IRQ_NONE; | |
236 | ||
237 | while (readl(c->irq_status) & I2O_IRQ_OUTBOUND_POST) { | |
238 | m = readl(c->out_port); | |
239 | if (m == I2O_QUEUE_EMPTY) { | |
240 | /* | |
241 | * Old 960 steppings had a bug in the I2O unit that | |
242 | * caused the queue to appear empty when it wasn't. | |
243 | */ | |
244 | m = readl(c->out_port); | |
245 | if (unlikely(m == I2O_QUEUE_EMPTY)) | |
246 | break; | |
247 | } | |
1da177e4 | 248 | |
1da177e4 | 249 | /* dispatch it */ |
f10378ff | 250 | if (i2o_driver_dispatch(c, m)) |
1da177e4 | 251 | /* flush it if result != 0 */ |
f10378ff ML |
252 | i2o_flush_reply(c, m); |
253 | ||
254 | rc = IRQ_HANDLED; | |
1da177e4 | 255 | } |
f88e119c | 256 | |
f10378ff | 257 | return rc; |
1da177e4 LT |
258 | } |
259 | ||
260 | /** | |
261 | * i2o_pci_irq_enable - Allocate interrupt for I2O controller | |
d9489fb6 | 262 | * @c: i2o_controller that the request is for |
1da177e4 LT |
263 | * |
264 | * Allocate an interrupt for the I2O controller, and activate interrupts | |
265 | * on the I2O controller. | |
266 | * | |
267 | * Returns 0 on success or negative error code on failure. | |
268 | */ | |
269 | static int i2o_pci_irq_enable(struct i2o_controller *c) | |
270 | { | |
271 | struct pci_dev *pdev = c->pdev; | |
272 | int rc; | |
273 | ||
f88e119c | 274 | writel(0xffffffff, c->irq_mask); |
1da177e4 LT |
275 | |
276 | if (pdev->irq) { | |
dace1453 | 277 | rc = request_irq(pdev->irq, i2o_pci_interrupt, IRQF_SHARED, |
1da177e4 LT |
278 | c->name, c); |
279 | if (rc < 0) { | |
280 | printk(KERN_ERR "%s: unable to allocate interrupt %d." | |
281 | "\n", c->name, pdev->irq); | |
282 | return rc; | |
283 | } | |
284 | } | |
285 | ||
f88e119c | 286 | writel(0x00000000, c->irq_mask); |
1da177e4 LT |
287 | |
288 | printk(KERN_INFO "%s: Installed at IRQ %d\n", c->name, pdev->irq); | |
289 | ||
290 | return 0; | |
291 | } | |
292 | ||
293 | /** | |
294 | * i2o_pci_irq_disable - Free interrupt for I2O controller | |
295 | * @c: I2O controller | |
296 | * | |
297 | * Disable interrupts in I2O controller and then free interrupt. | |
298 | */ | |
299 | static void i2o_pci_irq_disable(struct i2o_controller *c) | |
300 | { | |
f88e119c | 301 | writel(0xffffffff, c->irq_mask); |
1da177e4 LT |
302 | |
303 | if (c->pdev->irq > 0) | |
304 | free_irq(c->pdev->irq, c); | |
305 | } | |
306 | ||
307 | /** | |
308 | * i2o_pci_probe - Probe the PCI device for an I2O controller | |
d9489fb6 | 309 | * @pdev: PCI device to test |
1da177e4 LT |
310 | * @id: id which matched with the PCI device id table |
311 | * | |
312 | * Probe the PCI device for any device which is a memory of the | |
313 | * Intelligent, I2O class or an Adaptec Zero Channel Controller. We | |
314 | * attempt to set up each such device and register it with the core. | |
315 | * | |
316 | * Returns 0 on success or negative error code on failure. | |
317 | */ | |
318 | static int __devinit i2o_pci_probe(struct pci_dev *pdev, | |
319 | const struct pci_device_id *id) | |
320 | { | |
321 | struct i2o_controller *c; | |
322 | int rc; | |
61fbfa81 | 323 | struct pci_dev *i960 = NULL; |
1da177e4 LT |
324 | |
325 | printk(KERN_INFO "i2o: Checking for PCI I2O controllers...\n"); | |
326 | ||
327 | if ((pdev->class & 0xff) > 1) { | |
61fbfa81 ML |
328 | printk(KERN_WARNING "i2o: %s does not support I2O 1.5 " |
329 | "(skipping).\n", pci_name(pdev)); | |
1da177e4 LT |
330 | return -ENODEV; |
331 | } | |
332 | ||
95ddc5f2 IPG |
333 | if ((rc = pci_enable_device(pdev))) { |
334 | printk(KERN_WARNING "i2o: couldn't enable device %s\n", | |
335 | pci_name(pdev)); | |
336 | return rc; | |
337 | } | |
9638d89a | 338 | |
284901a9 | 339 | if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) { |
61fbfa81 ML |
340 | printk(KERN_WARNING "i2o: no suitable DMA found for %s\n", |
341 | pci_name(pdev)); | |
1da177e4 LT |
342 | rc = -ENODEV; |
343 | goto disable; | |
344 | } | |
345 | ||
346 | pci_set_master(pdev); | |
347 | ||
348 | c = i2o_iop_alloc(); | |
349 | if (IS_ERR(c)) { | |
61fbfa81 ML |
350 | printk(KERN_ERR "i2o: couldn't allocate memory for %s\n", |
351 | pci_name(pdev)); | |
1da177e4 LT |
352 | rc = PTR_ERR(c); |
353 | goto disable; | |
61fbfa81 ML |
354 | } else |
355 | printk(KERN_INFO "%s: controller found (%s)\n", c->name, | |
356 | pci_name(pdev)); | |
1da177e4 LT |
357 | |
358 | c->pdev = pdev; | |
dcceafe2 | 359 | c->device.parent = &pdev->dev; |
1da177e4 LT |
360 | |
361 | /* Cards that fall apart if you hit them with large I/O loads... */ | |
362 | if (pdev->vendor == PCI_VENDOR_ID_NCR && pdev->device == 0x0630) { | |
363 | c->short_req = 1; | |
364 | printk(KERN_INFO "%s: Symbios FC920 workarounds activated.\n", | |
365 | c->name); | |
366 | } | |
367 | ||
368 | if (pdev->subsystem_vendor == PCI_VENDOR_ID_PROMISE) { | |
61fbfa81 ML |
369 | /* |
370 | * Expose the ship behind i960 for initialization, or it will | |
371 | * failed | |
372 | */ | |
df10f4ed | 373 | i960 = pci_get_slot(c->pdev->bus, |
61fbfa81 ML |
374 | PCI_DEVFN(PCI_SLOT(c->pdev->devfn), 0)); |
375 | ||
df10f4ed | 376 | if (i960) { |
61fbfa81 | 377 | pci_write_config_word(i960, 0x42, 0); |
df10f4ed AC |
378 | pci_dev_put(i960); |
379 | } | |
61fbfa81 | 380 | |
1da177e4 | 381 | c->promise = 1; |
718c3183 | 382 | c->limit_sectors = 1; |
1da177e4 LT |
383 | } |
384 | ||
b2aaee33 ML |
385 | if (pdev->subsystem_vendor == PCI_VENDOR_ID_DPT) |
386 | c->adaptec = 1; | |
387 | ||
1da177e4 LT |
388 | /* Cards that go bananas if you quiesce them before you reset them. */ |
389 | if (pdev->vendor == PCI_VENDOR_ID_DPT) { | |
390 | c->no_quiesce = 1; | |
391 | if (pdev->device == 0xa511) | |
392 | c->raptor = 1; | |
b2aaee33 ML |
393 | |
394 | if (pdev->subsystem_device == 0xc05a) { | |
395 | c->limit_sectors = 1; | |
396 | printk(KERN_INFO | |
397 | "%s: limit sectors per request to %d\n", c->name, | |
398 | I2O_MAX_SECTORS_LIMITED); | |
399 | } | |
400 | #ifdef CONFIG_I2O_EXT_ADAPTEC_DMA64 | |
401 | if (sizeof(dma_addr_t) > 4) { | |
6a35528a | 402 | if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) |
b2aaee33 ML |
403 | printk(KERN_INFO "%s: 64-bit DMA unavailable\n", |
404 | c->name); | |
405 | else { | |
406 | c->pae_support = 1; | |
407 | printk(KERN_INFO "%s: using 64-bit DMA\n", | |
408 | c->name); | |
409 | } | |
410 | } | |
411 | #endif | |
1da177e4 LT |
412 | } |
413 | ||
414 | if ((rc = i2o_pci_alloc(c))) { | |
415 | printk(KERN_ERR "%s: DMA / IO allocation for I2O controller " | |
15d8ec7d | 416 | "failed\n", c->name); |
1da177e4 LT |
417 | goto free_controller; |
418 | } | |
419 | ||
420 | if (i2o_pci_irq_enable(c)) { | |
421 | printk(KERN_ERR "%s: unable to enable interrupts for I2O " | |
422 | "controller\n", c->name); | |
423 | goto free_pci; | |
424 | } | |
425 | ||
426 | if ((rc = i2o_iop_add(c))) | |
427 | goto uninstall; | |
428 | ||
61fbfa81 ML |
429 | if (i960) |
430 | pci_write_config_word(i960, 0x42, 0x03ff); | |
431 | ||
1da177e4 LT |
432 | return 0; |
433 | ||
434 | uninstall: | |
435 | i2o_pci_irq_disable(c); | |
436 | ||
437 | free_pci: | |
438 | i2o_pci_free(c); | |
439 | ||
440 | free_controller: | |
16a63173 | 441 | i2o_iop_free(c); |
1da177e4 LT |
442 | |
443 | disable: | |
95ddc5f2 | 444 | pci_disable_device(pdev); |
1da177e4 LT |
445 | |
446 | return rc; | |
447 | } | |
448 | ||
449 | /** | |
450 | * i2o_pci_remove - Removes a I2O controller from the system | |
d9489fb6 | 451 | * @pdev: I2O controller which should be removed |
1da177e4 LT |
452 | * |
453 | * Reset the I2O controller, disable interrupts and remove all allocated | |
454 | * resources. | |
455 | */ | |
456 | static void __devexit i2o_pci_remove(struct pci_dev *pdev) | |
457 | { | |
458 | struct i2o_controller *c; | |
459 | c = pci_get_drvdata(pdev); | |
460 | ||
461 | i2o_iop_remove(c); | |
462 | i2o_pci_irq_disable(c); | |
463 | i2o_pci_free(c); | |
464 | ||
f88e119c ML |
465 | pci_disable_device(pdev); |
466 | ||
1da177e4 LT |
467 | printk(KERN_INFO "%s: Controller removed.\n", c->name); |
468 | ||
f88e119c | 469 | put_device(&c->device); |
1da177e4 LT |
470 | }; |
471 | ||
472 | /* PCI driver for I2O controller */ | |
473 | static struct pci_driver i2o_pci_driver = { | |
f88e119c | 474 | .name = "PCI_I2O", |
1da177e4 LT |
475 | .id_table = i2o_pci_ids, |
476 | .probe = i2o_pci_probe, | |
477 | .remove = __devexit_p(i2o_pci_remove), | |
478 | }; | |
479 | ||
480 | /** | |
481 | * i2o_pci_init - registers I2O PCI driver in PCI subsystem | |
482 | * | |
483 | * Returns > 0 on success or negative error code on failure. | |
484 | */ | |
485 | int __init i2o_pci_init(void) | |
486 | { | |
487 | return pci_register_driver(&i2o_pci_driver); | |
488 | }; | |
489 | ||
490 | /** | |
491 | * i2o_pci_exit - unregisters I2O PCI driver from PCI subsystem | |
492 | */ | |
493 | void __exit i2o_pci_exit(void) | |
494 | { | |
495 | pci_unregister_driver(&i2o_pci_driver); | |
496 | }; | |
a1a5ea70 | 497 | |
1da177e4 | 498 | MODULE_DEVICE_TABLE(pci, i2o_pci_ids); |