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 void * pciehprm_get_slot(struct slot *slot)
60 int pciehprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busnum, u8 devnum)
63 *sun = (u8) (ctrl->first_slot);
68 static void print_pci_resource ( struct pci_resource *aprh)
70 struct pci_resource *res;
72 for (res = aprh; res; res = res->next)
73 dbg(" base= 0x%x length= 0x%x\n", res->base, res->length);
77 static void phprm_dump_func_res( struct pci_func *fun)
79 struct pci_func *func = fun;
82 dbg(": BUS Resources:\n");
83 print_pci_resource (func->bus_head);
86 dbg(": IO Resources:\n");
87 print_pci_resource (func->io_head);
90 dbg(": MEM Resources:\n");
91 print_pci_resource (func->mem_head);
93 if (func->p_mem_head) {
94 dbg(": PMEM Resources:\n");
95 print_pci_resource (func->p_mem_head);
99 static int phprm_get_used_resources (
100 struct controller *ctrl,
101 struct pci_func *func
104 return pciehp_save_used_resources (ctrl, func, !DISABLE_CARD);
107 static int phprm_delete_resource(
108 struct pci_resource **aprh,
112 struct pci_resource *res;
113 struct pci_resource *prevnode;
114 struct pci_resource *split_node;
117 pciehp_resource_sort_and_combine(aprh);
119 for (res = *aprh; res; res = res->next) {
120 if (res->base > base)
123 if ((res->base + res->length) < (base + size))
126 if (res->base < base) {
129 if ((res->length - (tbase - res->base)) < size)
132 split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
136 split_node->base = res->base;
137 split_node->length = tbase - res->base;
139 res->length -= split_node->length;
141 split_node->next = res->next;
142 res->next = split_node;
145 if (res->length >= size) {
146 split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
150 split_node->base = res->base + size;
151 split_node->length = res->length - size;
154 split_node->next = res->next;
155 res->next = split_node;
162 while (prevnode->next != res)
163 prevnode = prevnode->next;
165 prevnode->next = res->next;
176 static int phprm_delete_resources(
177 struct pci_resource **aprh,
178 struct pci_resource *this
181 struct pci_resource *res;
183 for (res = this; res; res = res->next)
184 phprm_delete_resource(aprh, res->base, res->length);
190 static int configure_existing_function(
191 struct controller *ctrl,
192 struct pci_func *func
197 /* see how much resources the func has used. */
198 rc = phprm_get_used_resources (ctrl, func);
201 /* subtract the resources used by the func from ctrl resources */
202 rc = phprm_delete_resources (&ctrl->bus_head, func->bus_head);
203 rc |= phprm_delete_resources (&ctrl->io_head, func->io_head);
204 rc |= phprm_delete_resources (&ctrl->mem_head, func->mem_head);
205 rc |= phprm_delete_resources (&ctrl->p_mem_head, func->p_mem_head);
207 warn("aCEF: cannot del used resources\n");
209 err("aCEF: cannot get used resources\n");
214 static int pciehprm_delete_resource(
215 struct pci_resource **aprh,
219 struct pci_resource *res;
220 struct pci_resource *prevnode;
221 struct pci_resource *split_node;
224 pciehp_resource_sort_and_combine(aprh);
226 for (res = *aprh; res; res = res->next) {
227 if (res->base > base)
230 if ((res->base + res->length) < (base + size))
233 if (res->base < base) {
236 if ((res->length - (tbase - res->base)) < size)
239 split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
243 split_node->base = res->base;
244 split_node->length = tbase - res->base;
246 res->length -= split_node->length;
248 split_node->next = res->next;
249 res->next = split_node;
252 if (res->length >= size) {
253 split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
257 split_node->base = res->base + size;
258 split_node->length = res->length - size;
261 split_node->next = res->next;
262 res->next = split_node;
269 while (prevnode->next != res)
270 prevnode = prevnode->next;
272 prevnode->next = res->next;
282 static int bind_pci_resources_to_slots ( struct controller *ctrl)
284 struct pci_func *func;
285 int busn = ctrl->slot_bus;
289 for (devn = 0; devn < 32; devn++) {
290 for (funn = 0; funn < 8; funn++) {
292 if (devn == ctrl->device && funn == ctrl->function)
295 /* find out if this entry is for an occupied slot */
298 pci_bus_read_config_dword(ctrl->pci_dev->subordinate, PCI_DEVFN(devn, funn), PCI_VENDOR_ID, &vid);
300 if (vid != 0xFFFFFFFF) {
301 dbg("%s: vid = %x bus %x dev %x fun %x\n", __FUNCTION__,
302 vid, busn, devn, funn);
303 func = pciehp_slot_find(busn, devn, funn);
304 dbg("%s: func = %p\n", __FUNCTION__,func);
307 configure_existing_function(ctrl, func);
308 dbg("aCCF:existing PCI 0x%x Func ResourceDump\n", ctrl->bus);
309 phprm_dump_func_res(func);
317 static void phprm_dump_ctrl_res( struct controller *ctlr)
319 struct controller *ctrl = ctlr;
321 if (ctrl->bus_head) {
322 dbg(": BUS Resources:\n");
323 print_pci_resource (ctrl->bus_head);
326 dbg(": IO Resources:\n");
327 print_pci_resource (ctrl->io_head);
329 if (ctrl->mem_head) {
330 dbg(": MEM Resources:\n");
331 print_pci_resource (ctrl->mem_head);
333 if (ctrl->p_mem_head) {
334 dbg(": PMEM Resources:\n");
335 print_pci_resource (ctrl->p_mem_head);
340 * phprm_find_available_resources
342 * Finds available memory, IO, and IRQ resources for programming
343 * devices which may be added to the system
344 * this function is for hot plug ADD!
346 * returns 0 if success
348 int pciehprm_find_available_resources(struct controller *ctrl)
350 struct pci_func func;
353 memset(&func, 0, sizeof(struct pci_func));
355 func.bus = ctrl->bus;
356 func.device = ctrl->device;
357 func.function = ctrl->function;
360 /* Get resources for this PCI bridge */
361 rc = pciehp_save_used_resources (ctrl, &func, !DISABLE_CARD);
362 dbg("%s: pciehp_save_used_resources rc = %d\n", __FUNCTION__, rc);
365 func.mem_head->next = ctrl->mem_head;
366 ctrl->mem_head = func.mem_head;
369 func.p_mem_head->next = ctrl->p_mem_head;
370 ctrl->p_mem_head = func.p_mem_head;
373 func.io_head->next = ctrl->io_head;
374 ctrl->io_head = func.io_head;
377 func.bus_head->next = ctrl->bus_head;
378 ctrl->bus_head = func.bus_head;
381 pciehprm_delete_resource(&ctrl->bus_head, ctrl->pci_dev->subordinate->number, 1);
383 dbg("%s:pre-Bind PCI 0x%x Ctrl Resource Dump\n", __FUNCTION__, ctrl->bus);
384 phprm_dump_ctrl_res(ctrl);
386 dbg("%s: before bind_pci_resources_to slots\n", __FUNCTION__);
388 bind_pci_resources_to_slots (ctrl);
390 dbg("%s:post-Bind PCI 0x%x Ctrl Resource Dump\n", __FUNCTION__, ctrl->bus);
391 phprm_dump_ctrl_res(ctrl);
396 int pciehprm_set_hpp(
397 struct controller *ctrl,
398 struct pci_func *func,
403 struct pci_bus lpci_bus, *pci_bus;
405 memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
407 pci_bus->number = func->bus;
408 devfn = PCI_DEVFN(func->device, func->function);
410 temp_byte = 0x40; /* hard coded value for LT */
411 if (card_type == PCI_HEADER_TYPE_BRIDGE) {
412 /* set subordinate Latency Timer */
413 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, temp_byte);
416 dbg("%s: set secondary LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__,
417 func->bus, func->device, func->function);
422 /* set base Latency Timer */
423 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, temp_byte);
426 dbg("%s: set LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
430 /* set Cache Line size */
431 temp_byte = 0x08; /* hard coded value for CLS */
433 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, temp_byte);
436 dbg("%s: set CLS error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
439 /* set enable_perr */
440 /* set enable_serr */
445 void pciehprm_enable_card(
446 struct controller *ctrl,
447 struct pci_func *func,
450 u16 command, bcommand;
451 struct pci_bus lpci_bus, *pci_bus;
455 memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
457 pci_bus->number = func->bus;
458 devfn = PCI_DEVFN(func->device, func->function);
460 rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &command);
462 command |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR
463 | PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE
464 | PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
466 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command);
468 if (card_type == PCI_HEADER_TYPE_BRIDGE) {
470 rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcommand);
472 bcommand |= PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR
473 | PCI_BRIDGE_CTL_NO_ISA;
475 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, bcommand);
479 static int legacy_pciehprm_init_pci(void)
484 int pciehprm_init(enum php_ctlr_type ctrl_type)
490 retval = legacy_pciehprm_init_pci();