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>, <kristen.c.accardi@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 <linux/slab.h>
38 #include <asm/uaccess.h>
40 #include <asm/iosapic.h>
45 #include "pciehprm_nonacpi.h"
48 void pciehprm_cleanup(void)
53 int pciehprm_print_pirt(void)
58 int pciehprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busnum, u8 devnum)
61 *sun = (u8) (ctrl->first_slot);
66 static void print_pci_resource ( struct pci_resource *aprh)
68 struct pci_resource *res;
70 for (res = aprh; res; res = res->next)
71 dbg(" base= 0x%x length= 0x%x\n", res->base, res->length);
75 static void phprm_dump_func_res( struct pci_func *fun)
77 struct pci_func *func = fun;
80 dbg(": BUS Resources:\n");
81 print_pci_resource (func->bus_head);
84 dbg(": IO Resources:\n");
85 print_pci_resource (func->io_head);
88 dbg(": MEM Resources:\n");
89 print_pci_resource (func->mem_head);
91 if (func->p_mem_head) {
92 dbg(": PMEM Resources:\n");
93 print_pci_resource (func->p_mem_head);
97 static int phprm_get_used_resources (
98 struct controller *ctrl,
102 return pciehp_save_used_resources (ctrl, func, !DISABLE_CARD);
105 static int phprm_delete_resource(
106 struct pci_resource **aprh,
110 struct pci_resource *res;
111 struct pci_resource *prevnode;
112 struct pci_resource *split_node;
115 pciehp_resource_sort_and_combine(aprh);
117 for (res = *aprh; res; res = res->next) {
118 if (res->base > base)
121 if ((res->base + res->length) < (base + size))
124 if (res->base < base) {
127 if ((res->length - (tbase - res->base)) < size)
130 split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
134 split_node->base = res->base;
135 split_node->length = tbase - res->base;
137 res->length -= split_node->length;
139 split_node->next = res->next;
140 res->next = split_node;
143 if (res->length >= size) {
144 split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
148 split_node->base = res->base + size;
149 split_node->length = res->length - size;
152 split_node->next = res->next;
153 res->next = split_node;
160 while (prevnode->next != res)
161 prevnode = prevnode->next;
163 prevnode->next = res->next;
174 static int phprm_delete_resources(
175 struct pci_resource **aprh,
176 struct pci_resource *this
179 struct pci_resource *res;
181 for (res = this; res; res = res->next)
182 phprm_delete_resource(aprh, res->base, res->length);
188 static int configure_existing_function(
189 struct controller *ctrl,
190 struct pci_func *func
195 /* see how much resources the func has used. */
196 rc = phprm_get_used_resources (ctrl, func);
199 /* subtract the resources used by the func from ctrl resources */
200 rc = phprm_delete_resources (&ctrl->bus_head, func->bus_head);
201 rc |= phprm_delete_resources (&ctrl->io_head, func->io_head);
202 rc |= phprm_delete_resources (&ctrl->mem_head, func->mem_head);
203 rc |= phprm_delete_resources (&ctrl->p_mem_head, func->p_mem_head);
205 warn("aCEF: cannot del used resources\n");
207 err("aCEF: cannot get used resources\n");
212 static int pciehprm_delete_resource(
213 struct pci_resource **aprh,
217 struct pci_resource *res;
218 struct pci_resource *prevnode;
219 struct pci_resource *split_node;
222 pciehp_resource_sort_and_combine(aprh);
224 for (res = *aprh; res; res = res->next) {
225 if (res->base > base)
228 if ((res->base + res->length) < (base + size))
231 if (res->base < base) {
234 if ((res->length - (tbase - res->base)) < size)
237 split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
241 split_node->base = res->base;
242 split_node->length = tbase - res->base;
244 res->length -= split_node->length;
246 split_node->next = res->next;
247 res->next = split_node;
250 if (res->length >= size) {
251 split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
255 split_node->base = res->base + size;
256 split_node->length = res->length - size;
259 split_node->next = res->next;
260 res->next = split_node;
267 while (prevnode->next != res)
268 prevnode = prevnode->next;
270 prevnode->next = res->next;
280 static int bind_pci_resources_to_slots ( struct controller *ctrl)
282 struct pci_func *func, new_func;
283 int busn = ctrl->slot_bus;
287 for (devn = 0; devn < 32; devn++) {
288 for (funn = 0; funn < 8; funn++) {
290 if (devn == ctrl->device && funn == ctrl->function)
293 /* find out if this entry is for an occupied slot */
296 pci_bus_read_config_dword(ctrl->pci_dev->subordinate, PCI_DEVFN(devn, funn), PCI_VENDOR_ID, &vid);
298 if (vid != 0xFFFFFFFF) {
299 dbg("%s: vid = %x bus %x dev %x fun %x\n", __FUNCTION__,
300 vid, busn, devn, funn);
301 func = pciehp_slot_find(busn, devn, funn);
302 dbg("%s: func = %p\n", __FUNCTION__,func);
304 memset(&new_func, 0, sizeof(struct pci_func));
306 new_func.device = devn;
307 new_func.function = funn;
308 new_func.is_a_board = 1;
309 configure_existing_function(ctrl, &new_func);
310 phprm_dump_func_res(&new_func);
312 configure_existing_function(ctrl, func);
313 phprm_dump_func_res(func);
315 dbg("aCCF:existing PCI 0x%x Func ResourceDump\n", ctrl->bus);
323 static void phprm_dump_ctrl_res( struct controller *ctlr)
325 struct controller *ctrl = ctlr;
327 if (ctrl->bus_head) {
328 dbg(": BUS Resources:\n");
329 print_pci_resource (ctrl->bus_head);
332 dbg(": IO Resources:\n");
333 print_pci_resource (ctrl->io_head);
335 if (ctrl->mem_head) {
336 dbg(": MEM Resources:\n");
337 print_pci_resource (ctrl->mem_head);
339 if (ctrl->p_mem_head) {
340 dbg(": PMEM Resources:\n");
341 print_pci_resource (ctrl->p_mem_head);
346 * phprm_find_available_resources
348 * Finds available memory, IO, and IRQ resources for programming
349 * devices which may be added to the system
350 * this function is for hot plug ADD!
352 * returns 0 if success
354 int pciehprm_find_available_resources(struct controller *ctrl)
356 struct pci_func func;
359 memset(&func, 0, sizeof(struct pci_func));
361 func.bus = ctrl->bus;
362 func.device = ctrl->device;
363 func.function = ctrl->function;
366 /* Get resources for this PCI bridge */
367 rc = pciehp_save_used_resources (ctrl, &func, !DISABLE_CARD);
368 dbg("%s: pciehp_save_used_resources rc = %d\n", __FUNCTION__, rc);
371 func.mem_head->next = ctrl->mem_head;
372 ctrl->mem_head = func.mem_head;
375 func.p_mem_head->next = ctrl->p_mem_head;
376 ctrl->p_mem_head = func.p_mem_head;
379 func.io_head->next = ctrl->io_head;
380 ctrl->io_head = func.io_head;
383 func.bus_head->next = ctrl->bus_head;
384 ctrl->bus_head = func.bus_head;
387 pciehprm_delete_resource(&ctrl->bus_head, ctrl->pci_dev->subordinate->number, 1);
389 dbg("%s:pre-Bind PCI 0x%x Ctrl Resource Dump\n", __FUNCTION__, ctrl->bus);
390 phprm_dump_ctrl_res(ctrl);
392 dbg("%s: before bind_pci_resources_to slots\n", __FUNCTION__);
394 bind_pci_resources_to_slots (ctrl);
396 dbg("%s:post-Bind PCI 0x%x Ctrl Resource Dump\n", __FUNCTION__, ctrl->bus);
397 phprm_dump_ctrl_res(ctrl);
402 int pciehprm_set_hpp(
403 struct controller *ctrl,
404 struct pci_func *func,
409 struct pci_bus lpci_bus, *pci_bus;
411 memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
413 pci_bus->number = func->bus;
414 devfn = PCI_DEVFN(func->device, func->function);
416 temp_byte = 0x40; /* hard coded value for LT */
417 if (card_type == PCI_HEADER_TYPE_BRIDGE) {
418 /* set subordinate Latency Timer */
419 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, temp_byte);
422 dbg("%s: set secondary LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__,
423 func->bus, func->device, func->function);
428 /* set base Latency Timer */
429 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, temp_byte);
432 dbg("%s: set LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
436 /* set Cache Line size */
437 temp_byte = 0x08; /* hard coded value for CLS */
439 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, temp_byte);
442 dbg("%s: set CLS error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
445 /* set enable_perr */
446 /* set enable_serr */
451 void pciehprm_enable_card(
452 struct controller *ctrl,
453 struct pci_func *func,
456 u16 command, bcommand;
457 struct pci_bus lpci_bus, *pci_bus;
461 memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
463 pci_bus->number = func->bus;
464 devfn = PCI_DEVFN(func->device, func->function);
466 rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &command);
468 command |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR
469 | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE
470 | PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
472 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command);
474 if (card_type == PCI_HEADER_TYPE_BRIDGE) {
476 rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcommand);
478 bcommand |= PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR
479 | PCI_BRIDGE_CTL_NO_ISA;
481 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, bcommand);
485 static int legacy_pciehprm_init_pci(void)
490 int pciehprm_init(enum php_ctlr_type ctrl_type)
496 retval = legacy_pciehprm_init_pci();