2 * PCIEHPRM NONACPI: PHP Resource Manager for Non-ACPI/Legacy platform
4 * Copyright (C) 1995,2001 Compaq Computer Corporation
5 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
6 * Copyright (C) 2001 IBM Corp.
7 * Copyright (C) 2003-2004 Intel Corporation
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 (at
14 * your option) any later version.
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
19 * NON INFRINGEMENT. See the GNU General Public License for more
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 * Send feedback to <greg@kroah.com>, <dely.l.sy@intel.com>
30 #include <linux/config.h>
31 #include <linux/module.h>
32 #include <linux/kernel.h>
33 #include <linux/types.h>
34 #include <linux/pci.h>
35 #include <linux/init.h>
36 #include <asm/uaccess.h>
38 #include <asm/iosapic.h>
42 #include "pciehprm_nonacpi.h"
45 void pciehprm_cleanup(void)
50 int pciehprm_print_pirt(void)
55 int pciehprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busnum, u8 devnum)
58 *sun = (u8) (ctrl->first_slot);
63 static void print_pci_resource ( struct pci_resource *aprh)
65 struct pci_resource *res;
67 for (res = aprh; res; res = res->next)
68 dbg(" base= 0x%x length= 0x%x\n", res->base, res->length);
72 static void phprm_dump_func_res( struct pci_func *fun)
74 struct pci_func *func = fun;
77 dbg(": BUS Resources:\n");
78 print_pci_resource (func->bus_head);
81 dbg(": IO Resources:\n");
82 print_pci_resource (func->io_head);
85 dbg(": MEM Resources:\n");
86 print_pci_resource (func->mem_head);
88 if (func->p_mem_head) {
89 dbg(": PMEM Resources:\n");
90 print_pci_resource (func->p_mem_head);
94 static int phprm_get_used_resources (
95 struct controller *ctrl,
99 return pciehp_save_used_resources (ctrl, func, !DISABLE_CARD);
102 static int phprm_delete_resource(
103 struct pci_resource **aprh,
107 struct pci_resource *res;
108 struct pci_resource *prevnode;
109 struct pci_resource *split_node;
112 pciehp_resource_sort_and_combine(aprh);
114 for (res = *aprh; res; res = res->next) {
115 if (res->base > base)
118 if ((res->base + res->length) < (base + size))
121 if (res->base < base) {
124 if ((res->length - (tbase - res->base)) < size)
127 split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
131 split_node->base = res->base;
132 split_node->length = tbase - res->base;
134 res->length -= split_node->length;
136 split_node->next = res->next;
137 res->next = split_node;
140 if (res->length >= size) {
141 split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
145 split_node->base = res->base + size;
146 split_node->length = res->length - size;
149 split_node->next = res->next;
150 res->next = split_node;
157 while (prevnode->next != res)
158 prevnode = prevnode->next;
160 prevnode->next = res->next;
171 static int phprm_delete_resources(
172 struct pci_resource **aprh,
173 struct pci_resource *this
176 struct pci_resource *res;
178 for (res = this; res; res = res->next)
179 phprm_delete_resource(aprh, res->base, res->length);
185 static int configure_existing_function(
186 struct controller *ctrl,
187 struct pci_func *func
192 /* see how much resources the func has used. */
193 rc = phprm_get_used_resources (ctrl, func);
196 /* subtract the resources used by the func from ctrl resources */
197 rc = phprm_delete_resources (&ctrl->bus_head, func->bus_head);
198 rc |= phprm_delete_resources (&ctrl->io_head, func->io_head);
199 rc |= phprm_delete_resources (&ctrl->mem_head, func->mem_head);
200 rc |= phprm_delete_resources (&ctrl->p_mem_head, func->p_mem_head);
202 warn("aCEF: cannot del used resources\n");
204 err("aCEF: cannot get used resources\n");
209 static int pciehprm_delete_resource(
210 struct pci_resource **aprh,
214 struct pci_resource *res;
215 struct pci_resource *prevnode;
216 struct pci_resource *split_node;
219 pciehp_resource_sort_and_combine(aprh);
221 for (res = *aprh; res; res = res->next) {
222 if (res->base > base)
225 if ((res->base + res->length) < (base + size))
228 if (res->base < base) {
231 if ((res->length - (tbase - res->base)) < size)
234 split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
238 split_node->base = res->base;
239 split_node->length = tbase - res->base;
241 res->length -= split_node->length;
243 split_node->next = res->next;
244 res->next = split_node;
247 if (res->length >= size) {
248 split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
252 split_node->base = res->base + size;
253 split_node->length = res->length - size;
256 split_node->next = res->next;
257 res->next = split_node;
264 while (prevnode->next != res)
265 prevnode = prevnode->next;
267 prevnode->next = res->next;
277 static int bind_pci_resources_to_slots ( struct controller *ctrl)
279 struct pci_func *func;
280 int busn = ctrl->slot_bus;
284 for (devn = 0; devn < 32; devn++) {
285 for (funn = 0; funn < 8; funn++) {
287 if (devn == ctrl->device && funn == ctrl->function)
290 /* find out if this entry is for an occupied slot */
293 pci_bus_read_config_dword(ctrl->pci_dev->subordinate, PCI_DEVFN(devn, funn), PCI_VENDOR_ID, &vid);
295 if (vid != 0xFFFFFFFF) {
296 dbg("%s: vid = %x bus %x dev %x fun %x\n", __FUNCTION__,
297 vid, busn, devn, funn);
298 func = pciehp_slot_find(busn, devn, funn);
299 dbg("%s: func = %p\n", __FUNCTION__,func);
302 configure_existing_function(ctrl, func);
303 dbg("aCCF:existing PCI 0x%x Func ResourceDump\n", ctrl->bus);
304 phprm_dump_func_res(func);
312 static void phprm_dump_ctrl_res( struct controller *ctlr)
314 struct controller *ctrl = ctlr;
316 if (ctrl->bus_head) {
317 dbg(": BUS Resources:\n");
318 print_pci_resource (ctrl->bus_head);
321 dbg(": IO Resources:\n");
322 print_pci_resource (ctrl->io_head);
324 if (ctrl->mem_head) {
325 dbg(": MEM Resources:\n");
326 print_pci_resource (ctrl->mem_head);
328 if (ctrl->p_mem_head) {
329 dbg(": PMEM Resources:\n");
330 print_pci_resource (ctrl->p_mem_head);
335 * phprm_find_available_resources
337 * Finds available memory, IO, and IRQ resources for programming
338 * devices which may be added to the system
339 * this function is for hot plug ADD!
341 * returns 0 if success
343 int pciehprm_find_available_resources(struct controller *ctrl)
345 struct pci_func func;
348 memset(&func, 0, sizeof(struct pci_func));
350 func.bus = ctrl->bus;
351 func.device = ctrl->device;
352 func.function = ctrl->function;
355 /* Get resources for this PCI bridge */
356 rc = pciehp_save_used_resources (ctrl, &func, !DISABLE_CARD);
357 dbg("%s: pciehp_save_used_resources rc = %d\n", __FUNCTION__, rc);
360 func.mem_head->next = ctrl->mem_head;
361 ctrl->mem_head = func.mem_head;
364 func.p_mem_head->next = ctrl->p_mem_head;
365 ctrl->p_mem_head = func.p_mem_head;
368 func.io_head->next = ctrl->io_head;
369 ctrl->io_head = func.io_head;
372 func.bus_head->next = ctrl->bus_head;
373 ctrl->bus_head = func.bus_head;
376 pciehprm_delete_resource(&ctrl->bus_head, ctrl->pci_dev->subordinate->number, 1);
378 dbg("%s:pre-Bind PCI 0x%x Ctrl Resource Dump\n", __FUNCTION__, ctrl->bus);
379 phprm_dump_ctrl_res(ctrl);
381 dbg("%s: before bind_pci_resources_to slots\n", __FUNCTION__);
383 bind_pci_resources_to_slots (ctrl);
385 dbg("%s:post-Bind PCI 0x%x Ctrl Resource Dump\n", __FUNCTION__, ctrl->bus);
386 phprm_dump_ctrl_res(ctrl);
391 int pciehprm_set_hpp(
392 struct controller *ctrl,
393 struct pci_func *func,
398 struct pci_bus lpci_bus, *pci_bus;
400 memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
402 pci_bus->number = func->bus;
403 devfn = PCI_DEVFN(func->device, func->function);
405 temp_byte = 0x40; /* hard coded value for LT */
406 if (card_type == PCI_HEADER_TYPE_BRIDGE) {
407 /* set subordinate Latency Timer */
408 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, temp_byte);
411 dbg("%s: set secondary LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__,
412 func->bus, func->device, func->function);
417 /* set base Latency Timer */
418 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, temp_byte);
421 dbg("%s: set LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
425 /* set Cache Line size */
426 temp_byte = 0x08; /* hard coded value for CLS */
428 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, temp_byte);
431 dbg("%s: set CLS error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
434 /* set enable_perr */
435 /* set enable_serr */
440 void pciehprm_enable_card(
441 struct controller *ctrl,
442 struct pci_func *func,
445 u16 command, bcommand;
446 struct pci_bus lpci_bus, *pci_bus;
450 memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
452 pci_bus->number = func->bus;
453 devfn = PCI_DEVFN(func->device, func->function);
455 rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &command);
457 command |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR
458 | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE
459 | PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
461 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command);
463 if (card_type == PCI_HEADER_TYPE_BRIDGE) {
465 rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcommand);
467 bcommand |= PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR
468 | PCI_BRIDGE_CTL_NO_ISA;
470 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, bcommand);
474 static int legacy_pciehprm_init_pci(void)
479 int pciehprm_init(enum php_ctlr_type ctrl_type)
485 retval = legacy_pciehprm_init_pci();