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authorArnd Bergmann <arnd@arndb.de>2005-06-22 19:43:23 -0400
committerPaul Mackerras <paulus@samba.org>2005-06-22 19:43:23 -0400
commitc5a3c2e52af1bcb118022ffac9a0fd1d42d43bd3 (patch)
treee9a646214342f6cd0f003a1677ae57f4dc9be012 /arch/ppc64/kernel
parent773bf9c469c01f01280c9bd45ec2462dd94d08a0 (diff)
[PATCH] ppc64: Split out generic rtas code from pSeries_pci.c.
BPA is using rtas for PCI but should not be confused by pSeries code. This also avoids some #ifdefs. Other platforms that want to use rtas_pci.c could create their own platform_pci.c with platform specific fixups. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/ppc64/kernel')
-rw-r--r--arch/ppc64/kernel/Makefile3
-rw-r--r--arch/ppc64/kernel/mpic.h3
-rw-r--r--arch/ppc64/kernel/pSeries_pci.c476
-rw-r--r--arch/ppc64/kernel/rtas_pci.c495
4 files changed, 506 insertions, 471 deletions
diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile
index b5e167cf1a05..f389f2453daa 100644
--- a/arch/ppc64/kernel/Makefile
+++ b/arch/ppc64/kernel/Makefile
@@ -31,13 +31,14 @@ obj-$(CONFIG_PPC_MULTIPLATFORM) += nvram.o i8259.o prom_init.o prom.o mpic.o
31 31
32obj-$(CONFIG_PPC_PSERIES) += pSeries_pci.o pSeries_lpar.o pSeries_hvCall.o \ 32obj-$(CONFIG_PPC_PSERIES) += pSeries_pci.o pSeries_lpar.o pSeries_hvCall.o \
33 pSeries_nvram.o rtasd.o ras.o pSeries_reconfig.o \ 33 pSeries_nvram.o rtasd.o ras.o pSeries_reconfig.o \
34 xics.o rtas.o pSeries_setup.o pSeries_iommu.o 34 xics.o pSeries_setup.o pSeries_iommu.o
35 35
36obj-$(CONFIG_EEH) += eeh.o 36obj-$(CONFIG_EEH) += eeh.o
37obj-$(CONFIG_PROC_FS) += proc_ppc64.o 37obj-$(CONFIG_PROC_FS) += proc_ppc64.o
38obj-$(CONFIG_RTAS_FLASH) += rtas_flash.o 38obj-$(CONFIG_RTAS_FLASH) += rtas_flash.o
39obj-$(CONFIG_SMP) += smp.o 39obj-$(CONFIG_SMP) += smp.o
40obj-$(CONFIG_MODULES) += module.o ppc_ksyms.o 40obj-$(CONFIG_MODULES) += module.o ppc_ksyms.o
41obj-$(CONFIG_PPC_RTAS) += rtas.o rtas_pci.o
41obj-$(CONFIG_RTAS_PROC) += rtas-proc.o 42obj-$(CONFIG_RTAS_PROC) += rtas-proc.o
42obj-$(CONFIG_SCANLOG) += scanlog.o 43obj-$(CONFIG_SCANLOG) += scanlog.o
43obj-$(CONFIG_VIOPATH) += viopath.o 44obj-$(CONFIG_VIOPATH) += viopath.o
diff --git a/arch/ppc64/kernel/mpic.h b/arch/ppc64/kernel/mpic.h
index 571b3c99e062..63e177143eac 100644
--- a/arch/ppc64/kernel/mpic.h
+++ b/arch/ppc64/kernel/mpic.h
@@ -265,3 +265,6 @@ extern void mpic_send_ipi(unsigned int ipi_no, unsigned int cpu_mask);
265extern int mpic_get_one_irq(struct mpic *mpic, struct pt_regs *regs); 265extern int mpic_get_one_irq(struct mpic *mpic, struct pt_regs *regs);
266/* This one gets to the primary mpic */ 266/* This one gets to the primary mpic */
267extern int mpic_get_irq(struct pt_regs *regs); 267extern int mpic_get_irq(struct pt_regs *regs);
268
269/* global mpic for pSeries */
270extern struct mpic *pSeries_mpic;
diff --git a/arch/ppc64/kernel/pSeries_pci.c b/arch/ppc64/kernel/pSeries_pci.c
index 0b1cca281408..dfa6d3d3e9f0 100644
--- a/arch/ppc64/kernel/pSeries_pci.c
+++ b/arch/ppc64/kernel/pSeries_pci.c
@@ -1,13 +1,11 @@
1/* 1/*
2 * pSeries_pci.c 2 * arch/ppc64/kernel/pSeries_pci.c
3 * 3 *
4 * Copyright (C) 2001 Dave Engebretsen, IBM Corporation 4 * Copyright (C) 2001 Dave Engebretsen, IBM Corporation
5 * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM 5 * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
6 * 6 *
7 * pSeries specific routines for PCI. 7 * pSeries specific routines for PCI.
8 * 8 *
9 * Based on code from pci.c and chrp_pci.c
10 *
11 * This program is free software; you can redistribute it and/or modify 9 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by 10 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or 11 * the Free Software Foundation; either version 2 of the License, or
@@ -23,430 +21,18 @@
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 */ 22 */
25 23
24#include <linux/init.h>
25#include <linux/ioport.h>
26#include <linux/kernel.h> 26#include <linux/kernel.h>
27#include <linux/threads.h>
28#include <linux/pci.h> 27#include <linux/pci.h>
29#include <linux/string.h> 28#include <linux/string.h>
30#include <linux/init.h>
31#include <linux/bootmem.h>
32 29
33#include <asm/io.h>
34#include <asm/pgtable.h>
35#include <asm/irq.h>
36#include <asm/prom.h>
37#include <asm/machdep.h>
38#include <asm/pci-bridge.h> 30#include <asm/pci-bridge.h>
39#include <asm/iommu.h> 31#include <asm/prom.h>
40#include <asm/rtas.h>
41 32
42#include "mpic.h"
43#include "pci.h" 33#include "pci.h"
44 34
45/* RTAS tokens */ 35static int __initdata s7a_workaround;
46static int read_pci_config;
47static int write_pci_config;
48static int ibm_read_pci_config;
49static int ibm_write_pci_config;
50
51static int s7a_workaround;
52
53extern struct mpic *pSeries_mpic;
54
55static int config_access_valid(struct device_node *dn, int where)
56{
57 if (where < 256)
58 return 1;
59 if (where < 4096 && dn->pci_ext_config_space)
60 return 1;
61
62 return 0;
63}
64
65static int rtas_read_config(struct device_node *dn, int where, int size, u32 *val)
66{
67 int returnval = -1;
68 unsigned long buid, addr;
69 int ret;
70
71 if (!dn)
72 return PCIBIOS_DEVICE_NOT_FOUND;
73 if (!config_access_valid(dn, where))
74 return PCIBIOS_BAD_REGISTER_NUMBER;
75
76 addr = ((where & 0xf00) << 20) | (dn->busno << 16) |
77 (dn->devfn << 8) | (where & 0xff);
78 buid = dn->phb->buid;
79 if (buid) {
80 ret = rtas_call(ibm_read_pci_config, 4, 2, &returnval,
81 addr, buid >> 32, buid & 0xffffffff, size);
82 } else {
83 ret = rtas_call(read_pci_config, 2, 2, &returnval, addr, size);
84 }
85 *val = returnval;
86
87 if (ret)
88 return PCIBIOS_DEVICE_NOT_FOUND;
89
90 if (returnval == EEH_IO_ERROR_VALUE(size)
91 && eeh_dn_check_failure (dn, NULL))
92 return PCIBIOS_DEVICE_NOT_FOUND;
93
94 return PCIBIOS_SUCCESSFUL;
95}
96
97static int rtas_pci_read_config(struct pci_bus *bus,
98 unsigned int devfn,
99 int where, int size, u32 *val)
100{
101 struct device_node *busdn, *dn;
102
103 if (bus->self)
104 busdn = pci_device_to_OF_node(bus->self);
105 else
106 busdn = bus->sysdata; /* must be a phb */
107
108 /* Search only direct children of the bus */
109 for (dn = busdn->child; dn; dn = dn->sibling)
110 if (dn->devfn == devfn)
111 return rtas_read_config(dn, where, size, val);
112 return PCIBIOS_DEVICE_NOT_FOUND;
113}
114
115static int rtas_write_config(struct device_node *dn, int where, int size, u32 val)
116{
117 unsigned long buid, addr;
118 int ret;
119
120 if (!dn)
121 return PCIBIOS_DEVICE_NOT_FOUND;
122 if (!config_access_valid(dn, where))
123 return PCIBIOS_BAD_REGISTER_NUMBER;
124
125 addr = ((where & 0xf00) << 20) | (dn->busno << 16) |
126 (dn->devfn << 8) | (where & 0xff);
127 buid = dn->phb->buid;
128 if (buid) {
129 ret = rtas_call(ibm_write_pci_config, 5, 1, NULL, addr, buid >> 32, buid & 0xffffffff, size, (ulong) val);
130 } else {
131 ret = rtas_call(write_pci_config, 3, 1, NULL, addr, size, (ulong)val);
132 }
133
134 if (ret)
135 return PCIBIOS_DEVICE_NOT_FOUND;
136
137 return PCIBIOS_SUCCESSFUL;
138}
139
140static int rtas_pci_write_config(struct pci_bus *bus,
141 unsigned int devfn,
142 int where, int size, u32 val)
143{
144 struct device_node *busdn, *dn;
145
146 if (bus->self)
147 busdn = pci_device_to_OF_node(bus->self);
148 else
149 busdn = bus->sysdata; /* must be a phb */
150
151 /* Search only direct children of the bus */
152 for (dn = busdn->child; dn; dn = dn->sibling)
153 if (dn->devfn == devfn)
154 return rtas_write_config(dn, where, size, val);
155 return PCIBIOS_DEVICE_NOT_FOUND;
156}
157
158struct pci_ops rtas_pci_ops = {
159 rtas_pci_read_config,
160 rtas_pci_write_config
161};
162
163int is_python(struct device_node *dev)
164{
165 char *model = (char *)get_property(dev, "model", NULL);
166
167 if (model && strstr(model, "Python"))
168 return 1;
169
170 return 0;
171}
172
173static int get_phb_reg_prop(struct device_node *dev,
174 unsigned int addr_size_words,
175 struct reg_property64 *reg)
176{
177 unsigned int *ui_ptr = NULL, len;
178
179 /* Found a PHB, now figure out where his registers are mapped. */
180 ui_ptr = (unsigned int *)get_property(dev, "reg", &len);
181 if (ui_ptr == NULL)
182 return 1;
183
184 if (addr_size_words == 1) {
185 reg->address = ((struct reg_property32 *)ui_ptr)->address;
186 reg->size = ((struct reg_property32 *)ui_ptr)->size;
187 } else {
188 *reg = *((struct reg_property64 *)ui_ptr);
189 }
190
191 return 0;
192}
193
194static void python_countermeasures(struct device_node *dev,
195 unsigned int addr_size_words)
196{
197 struct reg_property64 reg_struct;
198 void __iomem *chip_regs;
199 volatile u32 val;
200
201 if (get_phb_reg_prop(dev, addr_size_words, &reg_struct))
202 return;
203
204 /* Python's register file is 1 MB in size. */
205 chip_regs = ioremap(reg_struct.address & ~(0xfffffUL), 0x100000);
206
207 /*
208 * Firmware doesn't always clear this bit which is critical
209 * for good performance - Anton
210 */
211
212#define PRG_CL_RESET_VALID 0x00010000
213
214 val = in_be32(chip_regs + 0xf6030);
215 if (val & PRG_CL_RESET_VALID) {
216 printk(KERN_INFO "Python workaround: ");
217 val &= ~PRG_CL_RESET_VALID;
218 out_be32(chip_regs + 0xf6030, val);
219 /*
220 * We must read it back for changes to
221 * take effect
222 */
223 val = in_be32(chip_regs + 0xf6030);
224 printk("reg0: %x\n", val);
225 }
226
227 iounmap(chip_regs);
228}
229
230void __init init_pci_config_tokens (void)
231{
232 read_pci_config = rtas_token("read-pci-config");
233 write_pci_config = rtas_token("write-pci-config");
234 ibm_read_pci_config = rtas_token("ibm,read-pci-config");
235 ibm_write_pci_config = rtas_token("ibm,write-pci-config");
236}
237
238unsigned long __devinit get_phb_buid (struct device_node *phb)
239{
240 int addr_cells;
241 unsigned int *buid_vals;
242 unsigned int len;
243 unsigned long buid;
244
245 if (ibm_read_pci_config == -1) return 0;
246
247 /* PHB's will always be children of the root node,
248 * or so it is promised by the current firmware. */
249 if (phb->parent == NULL)
250 return 0;
251 if (phb->parent->parent)
252 return 0;
253
254 buid_vals = (unsigned int *) get_property(phb, "reg", &len);
255 if (buid_vals == NULL)
256 return 0;
257
258 addr_cells = prom_n_addr_cells(phb);
259 if (addr_cells == 1) {
260 buid = (unsigned long) buid_vals[0];
261 } else {
262 buid = (((unsigned long)buid_vals[0]) << 32UL) |
263 (((unsigned long)buid_vals[1]) & 0xffffffff);
264 }
265 return buid;
266}
267
268static int phb_set_bus_ranges(struct device_node *dev,
269 struct pci_controller *phb)
270{
271 int *bus_range;
272 unsigned int len;
273
274 bus_range = (int *) get_property(dev, "bus-range", &len);
275 if (bus_range == NULL || len < 2 * sizeof(int)) {
276 return 1;
277 }
278
279 phb->first_busno = bus_range[0];
280 phb->last_busno = bus_range[1];
281
282 return 0;
283}
284
285static int __devinit setup_phb(struct device_node *dev,
286 struct pci_controller *phb,
287 unsigned int addr_size_words)
288{
289 pci_setup_pci_controller(phb);
290
291 if (is_python(dev))
292 python_countermeasures(dev, addr_size_words);
293
294 if (phb_set_bus_ranges(dev, phb))
295 return 1;
296
297 phb->arch_data = dev;
298 phb->ops = &rtas_pci_ops;
299 phb->buid = get_phb_buid(dev);
300
301 return 0;
302}
303
304static void __devinit add_linux_pci_domain(struct device_node *dev,
305 struct pci_controller *phb,
306 struct property *of_prop)
307{
308 memset(of_prop, 0, sizeof(struct property));
309 of_prop->name = "linux,pci-domain";
310 of_prop->length = sizeof(phb->global_number);
311 of_prop->value = (unsigned char *)&of_prop[1];
312 memcpy(of_prop->value, &phb->global_number, sizeof(phb->global_number));
313 prom_add_property(dev, of_prop);
314}
315
316static struct pci_controller * __init alloc_phb(struct device_node *dev,
317 unsigned int addr_size_words)
318{
319 struct pci_controller *phb;
320 struct property *of_prop;
321
322 phb = alloc_bootmem(sizeof(struct pci_controller));
323 if (phb == NULL)
324 return NULL;
325
326 of_prop = alloc_bootmem(sizeof(struct property) +
327 sizeof(phb->global_number));
328 if (!of_prop)
329 return NULL;
330
331 if (setup_phb(dev, phb, addr_size_words))
332 return NULL;
333
334 add_linux_pci_domain(dev, phb, of_prop);
335
336 return phb;
337}
338
339static struct pci_controller * __devinit alloc_phb_dynamic(struct device_node *dev, unsigned int addr_size_words)
340{
341 struct pci_controller *phb;
342
343 phb = (struct pci_controller *)kmalloc(sizeof(struct pci_controller),
344 GFP_KERNEL);
345 if (phb == NULL)
346 return NULL;
347
348 if (setup_phb(dev, phb, addr_size_words))
349 return NULL;
350
351 phb->is_dynamic = 1;
352
353 /* TODO: linux,pci-domain? */
354
355 return phb;
356}
357
358unsigned long __init find_and_init_phbs(void)
359{
360 struct device_node *node;
361 struct pci_controller *phb;
362 unsigned int root_size_cells = 0;
363 unsigned int index;
364 unsigned int *opprop = NULL;
365 struct device_node *root = of_find_node_by_path("/");
366
367 if (ppc64_interrupt_controller == IC_OPEN_PIC) {
368 opprop = (unsigned int *)get_property(root,
369 "platform-open-pic", NULL);
370 }
371
372 root_size_cells = prom_n_size_cells(root);
373
374 index = 0;
375
376 for (node = of_get_next_child(root, NULL);
377 node != NULL;
378 node = of_get_next_child(root, node)) {
379 if (node->type == NULL || strcmp(node->type, "pci") != 0)
380 continue;
381
382 phb = alloc_phb(node, root_size_cells);
383 if (!phb)
384 continue;
385
386 pci_process_bridge_OF_ranges(phb, node);
387 pci_setup_phb_io(phb, index == 0);
388
389 if (ppc64_interrupt_controller == IC_OPEN_PIC && pSeries_mpic) {
390 int addr = root_size_cells * (index + 2) - 1;
391 mpic_assign_isu(pSeries_mpic, index, opprop[addr]);
392 }
393
394 index++;
395 }
396
397 of_node_put(root);
398 pci_devs_phb_init();
399
400 /*
401 * pci_probe_only and pci_assign_all_buses can be set via properties
402 * in chosen.
403 */
404 if (of_chosen) {
405 int *prop;
406
407 prop = (int *)get_property(of_chosen, "linux,pci-probe-only",
408 NULL);
409 if (prop)
410 pci_probe_only = *prop;
411
412 prop = (int *)get_property(of_chosen,
413 "linux,pci-assign-all-buses", NULL);
414 if (prop)
415 pci_assign_all_buses = *prop;
416 }
417
418 return 0;
419}
420
421struct pci_controller * __devinit init_phb_dynamic(struct device_node *dn)
422{
423 struct device_node *root = of_find_node_by_path("/");
424 unsigned int root_size_cells = 0;
425 struct pci_controller *phb;
426 struct pci_bus *bus;
427 int primary;
428
429 root_size_cells = prom_n_size_cells(root);
430
431 primary = list_empty(&hose_list);
432 phb = alloc_phb_dynamic(dn, root_size_cells);
433 if (!phb)
434 return NULL;
435
436 pci_process_bridge_OF_ranges(phb, dn);
437
438 pci_setup_phb_io_dynamic(phb, primary);
439 of_node_put(root);
440
441 pci_devs_phb_init_dynamic(phb);
442 phb->last_busno = 0xff;
443 bus = pci_scan_bus(phb->first_busno, phb->ops, phb->arch_data);
444 phb->bus = bus;
445 phb->last_busno = bus->subordinate;
446
447 return phb;
448}
449EXPORT_SYMBOL(init_phb_dynamic);
450 36
451#if 0 37#if 0
452void pcibios_name_device(struct pci_dev *dev) 38void pcibios_name_device(struct pci_dev *dev)
@@ -474,7 +60,7 @@ void pcibios_name_device(struct pci_dev *dev)
474DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_name_device); 60DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_name_device);
475#endif 61#endif
476 62
477static void check_s7a(void) 63static void __init check_s7a(void)
478{ 64{
479 struct device_node *root; 65 struct device_node *root;
480 char *model; 66 char *model;
@@ -488,56 +74,6 @@ static void check_s7a(void)
488 } 74 }
489} 75}
490 76
491/* RPA-specific bits for removing PHBs */
492int pcibios_remove_root_bus(struct pci_controller *phb)
493{
494 struct pci_bus *b = phb->bus;
495 struct resource *res;
496 int rc, i;
497
498 res = b->resource[0];
499 if (!res->flags) {
500 printk(KERN_ERR "%s: no IO resource for PHB %s\n", __FUNCTION__,
501 b->name);
502 return 1;
503 }
504
505 rc = unmap_bus_range(b);
506 if (rc) {
507 printk(KERN_ERR "%s: failed to unmap IO on bus %s\n",
508 __FUNCTION__, b->name);
509 return 1;
510 }
511
512 if (release_resource(res)) {
513 printk(KERN_ERR "%s: failed to release IO on bus %s\n",
514 __FUNCTION__, b->name);
515 return 1;
516 }
517
518 for (i = 1; i < 3; ++i) {
519 res = b->resource[i];
520 if (!res->flags && i == 0) {
521 printk(KERN_ERR "%s: no MEM resource for PHB %s\n",
522 __FUNCTION__, b->name);
523 return 1;
524 }
525 if (res->flags && release_resource(res)) {
526 printk(KERN_ERR
527 "%s: failed to release IO %d on bus %s\n",
528 __FUNCTION__, i, b->name);
529 return 1;
530 }
531 }
532
533 list_del(&phb->list_node);
534 if (phb->is_dynamic)
535 kfree(phb);
536
537 return 0;
538}
539EXPORT_SYMBOL(pcibios_remove_root_bus);
540
541static void __init pSeries_request_regions(void) 77static void __init pSeries_request_regions(void)
542{ 78{
543 if (!isa_io_base) 79 if (!isa_io_base)
diff --git a/arch/ppc64/kernel/rtas_pci.c b/arch/ppc64/kernel/rtas_pci.c
new file mode 100644
index 000000000000..1048817befb8
--- /dev/null
+++ b/arch/ppc64/kernel/rtas_pci.c
@@ -0,0 +1,495 @@
1/*
2 * arch/ppc64/kernel/rtas_pci.c
3 *
4 * Copyright (C) 2001 Dave Engebretsen, IBM Corporation
5 * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
6 *
7 * RTAS specific routines for PCI.
8 *
9 * Based on code from pci.c, chrp_pci.c and pSeries_pci.c
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 */
25
26#include <linux/kernel.h>
27#include <linux/threads.h>
28#include <linux/pci.h>
29#include <linux/string.h>
30#include <linux/init.h>
31#include <linux/bootmem.h>
32
33#include <asm/io.h>
34#include <asm/pgtable.h>
35#include <asm/irq.h>
36#include <asm/prom.h>
37#include <asm/machdep.h>
38#include <asm/pci-bridge.h>
39#include <asm/iommu.h>
40#include <asm/rtas.h>
41
42#include "mpic.h"
43#include "pci.h"
44
45/* RTAS tokens */
46static int read_pci_config;
47static int write_pci_config;
48static int ibm_read_pci_config;
49static int ibm_write_pci_config;
50
51static int config_access_valid(struct device_node *dn, int where)
52{
53 if (where < 256)
54 return 1;
55 if (where < 4096 && dn->pci_ext_config_space)
56 return 1;
57
58 return 0;
59}
60
61static int rtas_read_config(struct device_node *dn, int where, int size, u32 *val)
62{
63 int returnval = -1;
64 unsigned long buid, addr;
65 int ret;
66
67 if (!dn)
68 return PCIBIOS_DEVICE_NOT_FOUND;
69 if (!config_access_valid(dn, where))
70 return PCIBIOS_BAD_REGISTER_NUMBER;
71
72 addr = ((where & 0xf00) << 20) | (dn->busno << 16) |
73 (dn->devfn << 8) | (where & 0xff);
74 buid = dn->phb->buid;
75 if (buid) {
76 ret = rtas_call(ibm_read_pci_config, 4, 2, &returnval,
77 addr, buid >> 32, buid & 0xffffffff, size);
78 } else {
79 ret = rtas_call(read_pci_config, 2, 2, &returnval, addr, size);
80 }
81 *val = returnval;
82
83 if (ret)
84 return PCIBIOS_DEVICE_NOT_FOUND;
85
86 if (returnval == EEH_IO_ERROR_VALUE(size)
87 && eeh_dn_check_failure (dn, NULL))
88 return PCIBIOS_DEVICE_NOT_FOUND;
89
90 return PCIBIOS_SUCCESSFUL;
91}
92
93static int rtas_pci_read_config(struct pci_bus *bus,
94 unsigned int devfn,
95 int where, int size, u32 *val)
96{
97 struct device_node *busdn, *dn;
98
99 if (bus->self)
100 busdn = pci_device_to_OF_node(bus->self);
101 else
102 busdn = bus->sysdata; /* must be a phb */
103
104 /* Search only direct children of the bus */
105 for (dn = busdn->child; dn; dn = dn->sibling)
106 if (dn->devfn == devfn)
107 return rtas_read_config(dn, where, size, val);
108 return PCIBIOS_DEVICE_NOT_FOUND;
109}
110
111static int rtas_write_config(struct device_node *dn, int where, int size, u32 val)
112{
113 unsigned long buid, addr;
114 int ret;
115
116 if (!dn)
117 return PCIBIOS_DEVICE_NOT_FOUND;
118 if (!config_access_valid(dn, where))
119 return PCIBIOS_BAD_REGISTER_NUMBER;
120
121 addr = ((where & 0xf00) << 20) | (dn->busno << 16) |
122 (dn->devfn << 8) | (where & 0xff);
123 buid = dn->phb->buid;
124 if (buid) {
125 ret = rtas_call(ibm_write_pci_config, 5, 1, NULL, addr, buid >> 32, buid & 0xffffffff, size, (ulong) val);
126 } else {
127 ret = rtas_call(write_pci_config, 3, 1, NULL, addr, size, (ulong)val);
128 }
129
130 if (ret)
131 return PCIBIOS_DEVICE_NOT_FOUND;
132
133 return PCIBIOS_SUCCESSFUL;
134}
135
136static int rtas_pci_write_config(struct pci_bus *bus,
137 unsigned int devfn,
138 int where, int size, u32 val)
139{
140 struct device_node *busdn, *dn;
141
142 if (bus->self)
143 busdn = pci_device_to_OF_node(bus->self);
144 else
145 busdn = bus->sysdata; /* must be a phb */
146
147 /* Search only direct children of the bus */
148 for (dn = busdn->child; dn; dn = dn->sibling)
149 if (dn->devfn == devfn)
150 return rtas_write_config(dn, where, size, val);
151 return PCIBIOS_DEVICE_NOT_FOUND;
152}
153
154struct pci_ops rtas_pci_ops = {
155 rtas_pci_read_config,
156 rtas_pci_write_config
157};
158
159int is_python(struct device_node *dev)
160{
161 char *model = (char *)get_property(dev, "model", NULL);
162
163 if (model && strstr(model, "Python"))
164 return 1;
165
166 return 0;
167}
168
169static int get_phb_reg_prop(struct device_node *dev,
170 unsigned int addr_size_words,
171 struct reg_property64 *reg)
172{
173 unsigned int *ui_ptr = NULL, len;
174
175 /* Found a PHB, now figure out where his registers are mapped. */
176 ui_ptr = (unsigned int *)get_property(dev, "reg", &len);
177 if (ui_ptr == NULL)
178 return 1;
179
180 if (addr_size_words == 1) {
181 reg->address = ((struct reg_property32 *)ui_ptr)->address;
182 reg->size = ((struct reg_property32 *)ui_ptr)->size;
183 } else {
184 *reg = *((struct reg_property64 *)ui_ptr);
185 }
186
187 return 0;
188}
189
190static void python_countermeasures(struct device_node *dev,
191 unsigned int addr_size_words)
192{
193 struct reg_property64 reg_struct;
194 void __iomem *chip_regs;
195 volatile u32 val;
196
197 if (get_phb_reg_prop(dev, addr_size_words, &reg_struct))
198 return;
199
200 /* Python's register file is 1 MB in size. */
201 chip_regs = ioremap(reg_struct.address & ~(0xfffffUL), 0x100000);
202
203 /*
204 * Firmware doesn't always clear this bit which is critical
205 * for good performance - Anton
206 */
207
208#define PRG_CL_RESET_VALID 0x00010000
209
210 val = in_be32(chip_regs + 0xf6030);
211 if (val & PRG_CL_RESET_VALID) {
212 printk(KERN_INFO "Python workaround: ");
213 val &= ~PRG_CL_RESET_VALID;
214 out_be32(chip_regs + 0xf6030, val);
215 /*
216 * We must read it back for changes to
217 * take effect
218 */
219 val = in_be32(chip_regs + 0xf6030);
220 printk("reg0: %x\n", val);
221 }
222
223 iounmap(chip_regs);
224}
225
226void __init init_pci_config_tokens (void)
227{
228 read_pci_config = rtas_token("read-pci-config");
229 write_pci_config = rtas_token("write-pci-config");
230 ibm_read_pci_config = rtas_token("ibm,read-pci-config");
231 ibm_write_pci_config = rtas_token("ibm,write-pci-config");
232}
233
234unsigned long __devinit get_phb_buid (struct device_node *phb)
235{
236 int addr_cells;
237 unsigned int *buid_vals;
238 unsigned int len;
239 unsigned long buid;
240
241 if (ibm_read_pci_config == -1) return 0;
242
243 /* PHB's will always be children of the root node,
244 * or so it is promised by the current firmware. */
245 if (phb->parent == NULL)
246 return 0;
247 if (phb->parent->parent)
248 return 0;
249
250 buid_vals = (unsigned int *) get_property(phb, "reg", &len);
251 if (buid_vals == NULL)
252 return 0;
253
254 addr_cells = prom_n_addr_cells(phb);
255 if (addr_cells == 1) {
256 buid = (unsigned long) buid_vals[0];
257 } else {
258 buid = (((unsigned long)buid_vals[0]) << 32UL) |
259 (((unsigned long)buid_vals[1]) & 0xffffffff);
260 }
261 return buid;
262}
263
264static int phb_set_bus_ranges(struct device_node *dev,
265 struct pci_controller *phb)
266{
267 int *bus_range;
268 unsigned int len;
269
270 bus_range = (int *) get_property(dev, "bus-range", &len);
271 if (bus_range == NULL || len < 2 * sizeof(int)) {
272 return 1;
273 }
274
275 phb->first_busno = bus_range[0];
276 phb->last_busno = bus_range[1];
277
278 return 0;
279}
280
281static int __devinit setup_phb(struct device_node *dev,
282 struct pci_controller *phb,
283 unsigned int addr_size_words)
284{
285 pci_setup_pci_controller(phb);
286
287 if (is_python(dev))
288 python_countermeasures(dev, addr_size_words);
289
290 if (phb_set_bus_ranges(dev, phb))
291 return 1;
292
293 phb->arch_data = dev;
294 phb->ops = &rtas_pci_ops;
295 phb->buid = get_phb_buid(dev);
296
297 return 0;
298}
299
300static void __devinit add_linux_pci_domain(struct device_node *dev,
301 struct pci_controller *phb,
302 struct property *of_prop)
303{
304 memset(of_prop, 0, sizeof(struct property));
305 of_prop->name = "linux,pci-domain";
306 of_prop->length = sizeof(phb->global_number);
307 of_prop->value = (unsigned char *)&of_prop[1];
308 memcpy(of_prop->value, &phb->global_number, sizeof(phb->global_number));
309 prom_add_property(dev, of_prop);
310}
311
312static struct pci_controller * __init alloc_phb(struct device_node *dev,
313 unsigned int addr_size_words)
314{
315 struct pci_controller *phb;
316 struct property *of_prop;
317
318 phb = alloc_bootmem(sizeof(struct pci_controller));
319 if (phb == NULL)
320 return NULL;
321
322 of_prop = alloc_bootmem(sizeof(struct property) +
323 sizeof(phb->global_number));
324 if (!of_prop)
325 return NULL;
326
327 if (setup_phb(dev, phb, addr_size_words))
328 return NULL;
329
330 add_linux_pci_domain(dev, phb, of_prop);
331
332 return phb;
333}
334
335static struct pci_controller * __devinit alloc_phb_dynamic(struct device_node *dev, unsigned int addr_size_words)
336{
337 struct pci_controller *phb;
338
339 phb = (struct pci_controller *)kmalloc(sizeof(struct pci_controller),
340 GFP_KERNEL);
341 if (phb == NULL)
342 return NULL;
343
344 if (setup_phb(dev, phb, addr_size_words))
345 return NULL;
346
347 phb->is_dynamic = 1;
348
349 /* TODO: linux,pci-domain? */
350
351 return phb;
352}
353
354unsigned long __init find_and_init_phbs(void)
355{
356 struct device_node *node;
357 struct pci_controller *phb;
358 unsigned int root_size_cells = 0;
359 unsigned int index;
360 unsigned int *opprop = NULL;
361 struct device_node *root = of_find_node_by_path("/");
362
363 if (ppc64_interrupt_controller == IC_OPEN_PIC) {
364 opprop = (unsigned int *)get_property(root,
365 "platform-open-pic", NULL);
366 }
367
368 root_size_cells = prom_n_size_cells(root);
369
370 index = 0;
371
372 for (node = of_get_next_child(root, NULL);
373 node != NULL;
374 node = of_get_next_child(root, node)) {
375 if (node->type == NULL || strcmp(node->type, "pci") != 0)
376 continue;
377
378 phb = alloc_phb(node, root_size_cells);
379 if (!phb)
380 continue;
381
382 pci_process_bridge_OF_ranges(phb, node);
383 pci_setup_phb_io(phb, index == 0);
384#ifdef CONFIG_PPC_PSERIES
385 if (ppc64_interrupt_controller == IC_OPEN_PIC && pSeries_mpic) {
386 int addr = root_size_cells * (index + 2) - 1;
387 mpic_assign_isu(pSeries_mpic, index, opprop[addr]);
388 }
389#endif
390 index++;
391 }
392
393 of_node_put(root);
394 pci_devs_phb_init();
395
396 /*
397 * pci_probe_only and pci_assign_all_buses can be set via properties
398 * in chosen.
399 */
400 if (of_chosen) {
401 int *prop;
402
403 prop = (int *)get_property(of_chosen, "linux,pci-probe-only",
404 NULL);
405 if (prop)
406 pci_probe_only = *prop;
407
408 prop = (int *)get_property(of_chosen,
409 "linux,pci-assign-all-buses", NULL);
410 if (prop)
411 pci_assign_all_buses = *prop;
412 }
413
414 return 0;
415}
416
417struct pci_controller * __devinit init_phb_dynamic(struct device_node *dn)
418{
419 struct device_node *root = of_find_node_by_path("/");
420 unsigned int root_size_cells = 0;
421 struct pci_controller *phb;
422 struct pci_bus *bus;
423 int primary;
424
425 root_size_cells = prom_n_size_cells(root);
426
427 primary = list_empty(&hose_list);
428 phb = alloc_phb_dynamic(dn, root_size_cells);
429 if (!phb)
430 return NULL;
431
432 pci_process_bridge_OF_ranges(phb, dn);
433
434 pci_setup_phb_io_dynamic(phb, primary);
435 of_node_put(root);
436
437 pci_devs_phb_init_dynamic(phb);
438 phb->last_busno = 0xff;
439 bus = pci_scan_bus(phb->first_busno, phb->ops, phb->arch_data);
440 phb->bus = bus;
441 phb->last_busno = bus->subordinate;
442
443 return phb;
444}
445EXPORT_SYMBOL(init_phb_dynamic);
446
447/* RPA-specific bits for removing PHBs */
448int pcibios_remove_root_bus(struct pci_controller *phb)
449{
450 struct pci_bus *b = phb->bus;
451 struct resource *res;
452 int rc, i;
453
454 res = b->resource[0];
455 if (!res->flags) {
456 printk(KERN_ERR "%s: no IO resource for PHB %s\n", __FUNCTION__,
457 b->name);
458 return 1;
459 }
460
461 rc = unmap_bus_range(b);
462 if (rc) {
463 printk(KERN_ERR "%s: failed to unmap IO on bus %s\n",
464 __FUNCTION__, b->name);
465 return 1;
466 }
467
468 if (release_resource(res)) {
469 printk(KERN_ERR "%s: failed to release IO on bus %s\n",
470 __FUNCTION__, b->name);
471 return 1;
472 }
473
474 for (i = 1; i < 3; ++i) {
475 res = b->resource[i];
476 if (!res->flags && i == 0) {
477 printk(KERN_ERR "%s: no MEM resource for PHB %s\n",
478 __FUNCTION__, b->name);
479 return 1;
480 }
481 if (res->flags && release_resource(res)) {
482 printk(KERN_ERR
483 "%s: failed to release IO %d on bus %s\n",
484 __FUNCTION__, i, b->name);
485 return 1;
486 }
487 }
488
489 list_del(&phb->list_node);
490 if (phb->is_dynamic)
491 kfree(phb);
492
493 return 0;
494}
495EXPORT_SYMBOL(pcibios_remove_root_bus);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-25 17:12:20 -0500