2 * IBM Hot Plug Controller Driver
4 * Written By: Chuck Cole, Jyoti Shah, Tong Yu, Irene Zubarev, IBM Corporation
6 * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
7 * Copyright (C) 2001-2003 IBM Corp.
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 <gregkh@us.ibm.com>
30 #include <linux/init.h>
31 #include <linux/module.h>
32 #include <linux/slab.h>
33 #include <linux/pci.h>
34 #include <linux/interrupt.h>
35 #include <linux/delay.h>
36 #include <linux/wait.h>
38 #include <asm/pci_x86.h> /* for struct irq_routing_table */
41 #define attn_on(sl) ibmphp_hpc_writeslot (sl, HPC_SLOT_ATTNON)
42 #define attn_off(sl) ibmphp_hpc_writeslot (sl, HPC_SLOT_ATTNOFF)
43 #define attn_LED_blink(sl) ibmphp_hpc_writeslot (sl, HPC_SLOT_BLINKLED)
44 #define get_ctrl_revision(sl, rev) ibmphp_hpc_readslot (sl, READ_REVLEVEL, rev)
45 #define get_hpc_options(sl, opt) ibmphp_hpc_readslot (sl, READ_HPCOPTIONS, opt)
47 #define DRIVER_VERSION "0.6"
48 #define DRIVER_DESC "IBM Hot Plug PCI Controller Driver"
53 module_param(debug, bool, S_IRUGO | S_IWUSR);
54 MODULE_PARM_DESC (debug, "Debugging mode enabled or not");
55 MODULE_LICENSE ("GPL");
56 MODULE_DESCRIPTION (DRIVER_DESC);
58 struct pci_bus *ibmphp_pci_bus;
61 static int irqs[16]; /* PIC mode IRQs we're using so far (in case MPS
62 * tables don't provide default info for empty slots */
67 static int get_max_adapter_speed_1 (struct hotplug_slot *, u8 *, u8);
69 static inline int get_max_adapter_speed (struct hotplug_slot *hs, u8 *value)
71 return get_max_adapter_speed_1 (hs, value, 1);
74 static inline int get_cur_bus_info(struct slot **sl)
77 struct slot *slot_cur = *sl;
79 debug("options = %x\n", slot_cur->ctrl->options);
80 debug("revision = %x\n", slot_cur->ctrl->revision);
82 if (READ_BUS_STATUS(slot_cur->ctrl))
83 rc = ibmphp_hpc_readslot(slot_cur, READ_BUSSTATUS, NULL);
88 slot_cur->bus_on->current_speed = CURRENT_BUS_SPEED(slot_cur->busstatus);
89 if (READ_BUS_MODE(slot_cur->ctrl))
90 slot_cur->bus_on->current_bus_mode =
91 CURRENT_BUS_MODE(slot_cur->busstatus);
93 slot_cur->bus_on->current_bus_mode = 0xFF;
95 debug("busstatus = %x, bus_speed = %x, bus_mode = %x\n",
97 slot_cur->bus_on->current_speed,
98 slot_cur->bus_on->current_bus_mode);
104 static inline int slot_update(struct slot **sl)
107 rc = ibmphp_hpc_readslot(*sl, READ_ALLSTAT, NULL);
111 rc = get_cur_bus_info(sl);
115 static int __init get_max_slots (void)
117 struct slot *slot_cur;
118 struct list_head *tmp;
121 list_for_each(tmp, &ibmphp_slot_head) {
122 slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
123 /* sometimes the hot-pluggable slots start with 4 (not always from 1) */
124 slot_count = max(slot_count, slot_cur->number);
129 /* This routine will put the correct slot->device information per slot. It's
130 * called from initialization of the slot structures. It will also assign
131 * interrupt numbers per each slot.
132 * Parameters: struct slot
133 * Returns 0 or errors
135 int ibmphp_init_devno(struct slot **cur_slot)
137 struct irq_routing_table *rtable;
142 rtable = pcibios_get_irq_routing_table();
144 err("no BIOS routing table...\n");
148 len = (rtable->size - sizeof(struct irq_routing_table)) /
149 sizeof(struct irq_info);
155 for (loop = 0; loop < len; loop++) {
156 if ((*cur_slot)->number == rtable->slots[loop].slot &&
157 (*cur_slot)->bus == rtable->slots[loop].bus) {
158 struct io_apic_irq_attr irq_attr;
160 (*cur_slot)->device = PCI_SLOT(rtable->slots[loop].devfn);
161 for (i = 0; i < 4; i++)
162 (*cur_slot)->irq[i] = IO_APIC_get_PCI_irq_vector((int) (*cur_slot)->bus,
163 (int) (*cur_slot)->device, i,
166 debug("(*cur_slot)->irq[0] = %x\n",
167 (*cur_slot)->irq[0]);
168 debug("(*cur_slot)->irq[1] = %x\n",
169 (*cur_slot)->irq[1]);
170 debug("(*cur_slot)->irq[2] = %x\n",
171 (*cur_slot)->irq[2]);
172 debug("(*cur_slot)->irq[3] = %x\n",
173 (*cur_slot)->irq[3]);
175 debug("rtable->exclusive_irqs = %x\n",
176 rtable->exclusive_irqs);
177 debug("rtable->slots[loop].irq[0].bitmap = %x\n",
178 rtable->slots[loop].irq[0].bitmap);
179 debug("rtable->slots[loop].irq[1].bitmap = %x\n",
180 rtable->slots[loop].irq[1].bitmap);
181 debug("rtable->slots[loop].irq[2].bitmap = %x\n",
182 rtable->slots[loop].irq[2].bitmap);
183 debug("rtable->slots[loop].irq[3].bitmap = %x\n",
184 rtable->slots[loop].irq[3].bitmap);
186 debug("rtable->slots[loop].irq[0].link = %x\n",
187 rtable->slots[loop].irq[0].link);
188 debug("rtable->slots[loop].irq[1].link = %x\n",
189 rtable->slots[loop].irq[1].link);
190 debug("rtable->slots[loop].irq[2].link = %x\n",
191 rtable->slots[loop].irq[2].link);
192 debug("rtable->slots[loop].irq[3].link = %x\n",
193 rtable->slots[loop].irq[3].link);
194 debug("end of init_devno\n");
204 static inline int power_on(struct slot *slot_cur)
206 u8 cmd = HPC_SLOT_ON;
209 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
211 err("power on failed\n");
214 if (CTLR_RESULT(slot_cur->ctrl->status)) {
215 err("command not completed successfully in power_on\n");
218 msleep(3000); /* For ServeRAID cards, and some 66 PCI */
222 static inline int power_off(struct slot *slot_cur)
224 u8 cmd = HPC_SLOT_OFF;
227 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
229 err("power off failed\n");
232 if (CTLR_RESULT(slot_cur->ctrl->status)) {
233 err("command not completed successfully in power_off\n");
239 static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
243 u8 cmd = 0x00; /* avoid compiler warning */
245 debug("set_attention_status - Entry hotplug_slot[%lx] value[%x]\n",
246 (ulong) hotplug_slot, value);
247 ibmphp_lock_operations();
252 case HPC_SLOT_ATTN_OFF:
253 cmd = HPC_SLOT_ATTNOFF;
255 case HPC_SLOT_ATTN_ON:
256 cmd = HPC_SLOT_ATTNON;
258 case HPC_SLOT_ATTN_BLINK:
259 cmd = HPC_SLOT_BLINKLED;
263 err("set_attention_status - Error : invalid input [%x]\n",
268 pslot = hotplug_slot->private;
270 rc = ibmphp_hpc_writeslot(pslot, cmd);
277 ibmphp_unlock_operations();
279 debug("set_attention_status - Exit rc[%d]\n", rc);
283 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
289 debug("get_attention_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
290 (ulong) hotplug_slot, (ulong) value);
292 ibmphp_lock_operations();
294 pslot = hotplug_slot->private;
296 memcpy(&myslot, pslot, sizeof(struct slot));
297 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
300 rc = ibmphp_hpc_readslot(pslot,
302 &(myslot.ext_status));
304 *value = SLOT_ATTN(myslot.status,
309 ibmphp_unlock_operations();
310 debug("get_attention_status - Exit rc[%d] value[%x]\n", rc, *value);
314 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
320 debug("get_latch_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
321 (ulong) hotplug_slot, (ulong) value);
322 ibmphp_lock_operations();
324 pslot = hotplug_slot->private;
326 memcpy(&myslot, pslot, sizeof(struct slot));
327 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
330 *value = SLOT_LATCH(myslot.status);
334 ibmphp_unlock_operations();
335 debug("get_latch_status - Exit rc[%d] rc[%x] value[%x]\n",
341 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
347 debug("get_power_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
348 (ulong) hotplug_slot, (ulong) value);
349 ibmphp_lock_operations();
351 pslot = hotplug_slot->private;
353 memcpy(&myslot, pslot, sizeof(struct slot));
354 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
357 *value = SLOT_PWRGD(myslot.status);
361 ibmphp_unlock_operations();
362 debug("get_power_status - Exit rc[%d] rc[%x] value[%x]\n",
367 static int get_adapter_present(struct hotplug_slot *hotplug_slot, u8 *value)
374 debug("get_adapter_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
375 (ulong) hotplug_slot, (ulong) value);
376 ibmphp_lock_operations();
378 pslot = hotplug_slot->private;
380 memcpy(&myslot, pslot, sizeof(struct slot));
381 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
384 present = SLOT_PRESENT(myslot.status);
385 if (present == HPC_SLOT_EMPTY)
393 ibmphp_unlock_operations();
394 debug("get_adapter_present - Exit rc[%d] value[%x]\n", rc, *value);
398 static int get_max_bus_speed(struct slot *slot)
402 enum pci_bus_speed speed;
403 struct pci_bus *bus = slot->hotplug_slot->pci_slot->bus;
405 debug("%s - Entry slot[%p]\n", __func__, slot);
407 ibmphp_lock_operations();
408 mode = slot->supported_bus_mode;
409 speed = slot->supported_speed;
410 ibmphp_unlock_operations();
416 if (mode == BUS_MODE_PCIX)
424 /* Note (will need to change): there would be soon 256, 512 also */
429 bus->max_bus_speed = speed;
431 debug("%s - Exit rc[%d] speed[%x]\n", __func__, rc, speed);
436 static int get_max_adapter_speed_1(struct hotplug_slot *hotplug_slot, u8 *value, u8 flag)
442 debug("get_max_adapter_speed_1 - Entry hotplug_slot[%lx] pvalue[%lx]\n",
443 (ulong)hotplug_slot, (ulong) value);
446 ibmphp_lock_operations();
448 if (hotplug_slot && value) {
449 pslot = hotplug_slot->private;
451 memcpy(&myslot, pslot, sizeof(struct slot));
452 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
455 if (!(SLOT_LATCH (myslot.status)) &&
456 (SLOT_PRESENT (myslot.status))) {
457 rc = ibmphp_hpc_readslot(pslot,
459 &(myslot.ext_status));
461 *value = SLOT_SPEED(myslot.ext_status);
463 *value = MAX_ADAPTER_NONE;
468 ibmphp_unlock_operations();
470 debug("get_max_adapter_speed_1 - Exit rc[%d] value[%x]\n", rc, *value);
474 static int get_bus_name(struct hotplug_slot *hotplug_slot, char *value)
477 struct slot *pslot = NULL;
479 debug("get_bus_name - Entry hotplug_slot[%lx]\n", (ulong)hotplug_slot);
481 ibmphp_lock_operations();
484 pslot = hotplug_slot->private;
487 snprintf(value, 100, "Bus %x", pslot->bus);
492 ibmphp_unlock_operations();
493 debug("get_bus_name - Exit rc[%d] value[%x]\n", rc, *value);
498 /****************************************************************************
499 * This routine will initialize the ops data structure used in the validate
500 * function. It will also power off empty slots that are powered on since BIOS
501 * leaves those on, albeit disconnected
502 ****************************************************************************/
503 static int __init init_ops(void)
505 struct slot *slot_cur;
506 struct list_head *tmp;
510 list_for_each(tmp, &ibmphp_slot_head) {
511 slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
516 debug("BEFORE GETTING SLOT STATUS, slot # %x\n",
518 if (slot_cur->ctrl->revision == 0xFF)
519 if (get_ctrl_revision(slot_cur,
520 &slot_cur->ctrl->revision))
523 if (slot_cur->bus_on->current_speed == 0xFF)
524 if (get_cur_bus_info(&slot_cur))
526 get_max_bus_speed(slot_cur);
528 if (slot_cur->ctrl->options == 0xFF)
529 if (get_hpc_options(slot_cur, &slot_cur->ctrl->options))
532 retval = slot_update(&slot_cur);
536 debug("status = %x\n", slot_cur->status);
537 debug("ext_status = %x\n", slot_cur->ext_status);
538 debug("SLOT_POWER = %x\n", SLOT_POWER(slot_cur->status));
539 debug("SLOT_PRESENT = %x\n", SLOT_PRESENT(slot_cur->status));
540 debug("SLOT_LATCH = %x\n", SLOT_LATCH(slot_cur->status));
542 if ((SLOT_PWRGD(slot_cur->status)) &&
543 !(SLOT_PRESENT(slot_cur->status)) &&
544 !(SLOT_LATCH(slot_cur->status))) {
545 debug("BEFORE POWER OFF COMMAND\n");
546 rc = power_off(slot_cur);
550 /* retval = slot_update(&slot_cur);
553 * ibmphp_update_slot_info(slot_cur);
561 /* This operation will check whether the slot is within the bounds and
562 * the operation is valid to perform on that slot
563 * Parameters: slot, operation
564 * Returns: 0 or error codes
566 static int validate(struct slot *slot_cur, int opn)
573 number = slot_cur->number;
574 if ((number > max_slots) || (number < 0))
576 debug("slot_number in validate is %d\n", slot_cur->number);
578 retval = slot_update(&slot_cur);
584 if (!(SLOT_PWRGD(slot_cur->status)) &&
585 (SLOT_PRESENT(slot_cur->status)) &&
586 !(SLOT_LATCH(slot_cur->status)))
590 if ((SLOT_PWRGD(slot_cur->status)) &&
591 (SLOT_PRESENT(slot_cur->status)) &&
592 !(SLOT_LATCH(slot_cur->status)))
598 err("validate failed....\n");
602 /****************************************************************************
603 * This routine is for updating the data structures in the hotplug core
604 * Parameters: struct slot
605 * Returns: 0 or error
606 ****************************************************************************/
607 int ibmphp_update_slot_info(struct slot *slot_cur)
609 struct hotplug_slot_info *info;
610 struct pci_bus *bus = slot_cur->hotplug_slot->pci_slot->bus;
615 info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
617 err("out of system memory\n");
621 info->power_status = SLOT_PWRGD(slot_cur->status);
622 info->attention_status = SLOT_ATTN(slot_cur->status,
623 slot_cur->ext_status);
624 info->latch_status = SLOT_LATCH(slot_cur->status);
625 if (!SLOT_PRESENT(slot_cur->status)) {
626 info->adapter_status = 0;
627 /* info->max_adapter_speed_status = MAX_ADAPTER_NONE; */
629 info->adapter_status = 1;
630 /* get_max_adapter_speed_1(slot_cur->hotplug_slot,
631 &info->max_adapter_speed_status, 0); */
634 bus_speed = slot_cur->bus_on->current_speed;
635 mode = slot_cur->bus_on->current_bus_mode;
641 if (mode == BUS_MODE_PCIX)
643 else if (mode == BUS_MODE_PCI)
646 bus_speed = PCI_SPEED_UNKNOWN;
653 bus_speed = PCI_SPEED_UNKNOWN;
656 bus->cur_bus_speed = bus_speed;
659 rc = pci_hp_change_slot_info(slot_cur->hotplug_slot, info);
665 /******************************************************************************
666 * This function will return the pci_func, given bus and devfunc, or NULL. It
667 * is called from visit routines
668 ******************************************************************************/
670 static struct pci_func *ibm_slot_find(u8 busno, u8 device, u8 function)
672 struct pci_func *func_cur;
673 struct slot *slot_cur;
674 struct list_head *tmp;
675 list_for_each(tmp, &ibmphp_slot_head) {
676 slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
677 if (slot_cur->func) {
678 func_cur = slot_cur->func;
680 if ((func_cur->busno == busno) &&
681 (func_cur->device == device) &&
682 (func_cur->function == function))
684 func_cur = func_cur->next;
691 /*************************************************************
692 * This routine frees up memory used by struct slot, including
693 * the pointers to pci_func, bus, hotplug_slot, controller,
694 * and deregistering from the hotplug core
695 *************************************************************/
696 static void free_slots(void)
698 struct slot *slot_cur;
699 struct list_head *tmp;
700 struct list_head *next;
702 debug("%s -- enter\n", __func__);
704 list_for_each_safe(tmp, next, &ibmphp_slot_head) {
705 slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
706 pci_hp_deregister(slot_cur->hotplug_slot);
708 debug("%s -- exit\n", __func__);
711 static void ibm_unconfigure_device(struct pci_func *func)
713 struct pci_dev *temp;
716 debug("inside %s\n", __func__);
717 debug("func->device = %x, func->function = %x\n",
718 func->device, func->function);
719 debug("func->device << 3 | 0x0 = %x\n", func->device << 3 | 0x0);
721 pci_lock_rescan_remove();
723 for (j = 0; j < 0x08; j++) {
724 temp = pci_get_bus_and_slot(func->busno, (func->device << 3) | j);
726 pci_stop_and_remove_bus_device(temp);
731 pci_dev_put(func->dev);
733 pci_unlock_rescan_remove();
737 * The following function is to fix kernel bug regarding
738 * getting bus entries, here we manually add those primary
739 * bus entries to kernel bus structure whenever apply
741 static u8 bus_structure_fixup(u8 busno)
747 if (pci_find_bus(0, busno) || !(ibmphp_find_same_bus_num(busno)))
750 bus = kmalloc(sizeof(*bus), GFP_KERNEL);
752 err("%s - out of memory\n", __func__);
755 dev = kmalloc(sizeof(*dev), GFP_KERNEL);
758 err("%s - out of memory\n", __func__);
763 bus->ops = ibmphp_pci_bus->ops;
765 for (dev->devfn = 0; dev->devfn < 256; dev->devfn += 8) {
766 if (!pci_read_config_word(dev, PCI_VENDOR_ID, &l) &&
767 (l != 0x0000) && (l != 0xffff)) {
768 debug("%s - Inside bus_structure_fixup()\n",
770 pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
781 static int ibm_configure_device(struct pci_func *func)
783 struct pci_bus *child;
785 int flag = 0; /* this is to make sure we don't double scan the bus,
786 for bridged devices primarily */
788 pci_lock_rescan_remove();
790 if (!(bus_structure_fixup(func->busno)))
792 if (func->dev == NULL)
793 func->dev = pci_get_bus_and_slot(func->busno,
794 PCI_DEVFN(func->device, func->function));
796 if (func->dev == NULL) {
797 struct pci_bus *bus = pci_find_bus(0, func->busno);
801 num = pci_scan_slot(bus,
802 PCI_DEVFN(func->device, func->function));
804 pci_bus_add_devices(bus);
806 func->dev = pci_get_bus_and_slot(func->busno,
807 PCI_DEVFN(func->device, func->function));
808 if (func->dev == NULL) {
809 err("ERROR... : pci_dev still NULL\n");
813 if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) {
814 pci_hp_add_bridge(func->dev);
815 child = func->dev->subordinate;
817 pci_bus_add_devices(child);
821 pci_unlock_rescan_remove();
825 /*******************************************************
826 * Returns whether the bus is empty or not
827 *******************************************************/
828 static int is_bus_empty(struct slot *slot_cur)
831 struct slot *tmp_slot;
832 u8 i = slot_cur->bus_on->slot_min;
834 while (i <= slot_cur->bus_on->slot_max) {
835 if (i == slot_cur->number) {
839 tmp_slot = ibmphp_get_slot_from_physical_num(i);
842 rc = slot_update(&tmp_slot);
845 if (SLOT_PRESENT(tmp_slot->status) &&
846 SLOT_PWRGD(tmp_slot->status))
853 /***********************************************************
854 * If the HPC permits and the bus currently empty, tries to set the
855 * bus speed and mode at the maximum card and bus capability
857 * Returns: bus is set (0) or error code
858 ***********************************************************/
859 static int set_bus(struct slot *slot_cur)
865 static struct pci_device_id ciobx[] = {
866 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, 0x0101) },
870 debug("%s - entry slot # %d\n", __func__, slot_cur->number);
871 if (SET_BUS_STATUS(slot_cur->ctrl) && is_bus_empty(slot_cur)) {
872 rc = slot_update(&slot_cur);
875 speed = SLOT_SPEED(slot_cur->ext_status);
876 debug("ext_status = %x, speed = %x\n", slot_cur->ext_status, speed);
878 case HPC_SLOT_SPEED_33:
879 cmd = HPC_BUS_33CONVMODE;
881 case HPC_SLOT_SPEED_66:
882 if (SLOT_PCIX(slot_cur->ext_status)) {
883 if ((slot_cur->supported_speed >= BUS_SPEED_66) &&
884 (slot_cur->supported_bus_mode == BUS_MODE_PCIX))
885 cmd = HPC_BUS_66PCIXMODE;
886 else if (!SLOT_BUS_MODE(slot_cur->ext_status))
887 /* if max slot/bus capability is 66 pci
888 and there's no bus mode mismatch, then
889 the adapter supports 66 pci */
890 cmd = HPC_BUS_66CONVMODE;
892 cmd = HPC_BUS_33CONVMODE;
894 if (slot_cur->supported_speed >= BUS_SPEED_66)
895 cmd = HPC_BUS_66CONVMODE;
897 cmd = HPC_BUS_33CONVMODE;
900 case HPC_SLOT_SPEED_133:
901 switch (slot_cur->supported_speed) {
903 cmd = HPC_BUS_33CONVMODE;
906 if (slot_cur->supported_bus_mode == BUS_MODE_PCIX)
907 cmd = HPC_BUS_66PCIXMODE;
909 cmd = HPC_BUS_66CONVMODE;
912 cmd = HPC_BUS_100PCIXMODE;
915 /* This is to take care of the bug in CIOBX chip */
916 if (pci_dev_present(ciobx))
917 ibmphp_hpc_writeslot(slot_cur,
918 HPC_BUS_100PCIXMODE);
919 cmd = HPC_BUS_133PCIXMODE;
922 err("Wrong bus speed\n");
927 err("wrong slot speed\n");
930 debug("setting bus speed for slot %d, cmd %x\n",
931 slot_cur->number, cmd);
932 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
934 err("setting bus speed failed\n");
937 if (CTLR_RESULT(slot_cur->ctrl->status)) {
938 err("command not completed successfully in set_bus\n");
942 /* This is for x440, once Brandon fixes the firmware,
943 will not need this delay */
945 debug("%s -Exit\n", __func__);
949 /* This routine checks the bus limitations that the slot is on from the BIOS.
950 * This is used in deciding whether or not to power up the slot.
951 * (electrical/spec limitations. For example, >1 133 MHz or >2 66 PCI cards on
954 * Returns: 0 = no limitations, -EINVAL = exceeded limitations on the bus
956 static int check_limitations(struct slot *slot_cur)
959 struct slot *tmp_slot;
963 for (i = slot_cur->bus_on->slot_min; i <= slot_cur->bus_on->slot_max; i++) {
964 tmp_slot = ibmphp_get_slot_from_physical_num(i);
967 if ((SLOT_PWRGD(tmp_slot->status)) &&
968 !(SLOT_CONNECT(tmp_slot->status)))
971 get_cur_bus_info(&slot_cur);
972 switch (slot_cur->bus_on->current_speed) {
974 limitation = slot_cur->bus_on->slots_at_33_conv;
977 if (slot_cur->bus_on->current_bus_mode == BUS_MODE_PCIX)
978 limitation = slot_cur->bus_on->slots_at_66_pcix;
980 limitation = slot_cur->bus_on->slots_at_66_conv;
983 limitation = slot_cur->bus_on->slots_at_100_pcix;
986 limitation = slot_cur->bus_on->slots_at_133_pcix;
990 if ((count + 1) > limitation)
995 static inline void print_card_capability(struct slot *slot_cur)
997 info("capability of the card is ");
998 if ((slot_cur->ext_status & CARD_INFO) == PCIX133)
999 info(" 133 MHz PCI-X\n");
1000 else if ((slot_cur->ext_status & CARD_INFO) == PCIX66)
1001 info(" 66 MHz PCI-X\n");
1002 else if ((slot_cur->ext_status & CARD_INFO) == PCI66)
1003 info(" 66 MHz PCI\n");
1005 info(" 33 MHz PCI\n");
1009 /* This routine will power on the slot, configure the device(s) and find the
1011 * Parameters: hotplug_slot
1012 * Returns: 0 or failure codes
1014 static int enable_slot(struct hotplug_slot *hs)
1017 struct slot *slot_cur;
1019 struct pci_func *tmp_func;
1021 ibmphp_lock_operations();
1023 debug("ENABLING SLOT........\n");
1024 slot_cur = hs->private;
1026 if ((rc = validate(slot_cur, ENABLE))) {
1027 err("validate function failed\n");
1031 attn_LED_blink(slot_cur);
1033 rc = set_bus(slot_cur);
1035 err("was not able to set the bus\n");
1039 /*-----------------debugging------------------------------*/
1040 get_cur_bus_info(&slot_cur);
1041 debug("the current bus speed right after set_bus = %x\n",
1042 slot_cur->bus_on->current_speed);
1043 /*----------------------------------------------------------*/
1045 rc = check_limitations(slot_cur);
1047 err("Adding this card exceeds the limitations of this bus.\n");
1048 err("(i.e., >1 133MHz cards running on same bus, or "
1049 ">2 66 PCI cards running on same bus.\n");
1050 err("Try hot-adding into another bus\n");
1055 rc = power_on(slot_cur);
1058 err("something wrong when powering up... please see below for details\n");
1059 /* need to turn off before on, otherwise, blinking overwrites */
1062 if (slot_update(&slot_cur)) {
1068 /* Check to see the error of why it failed */
1069 if ((SLOT_POWER(slot_cur->status)) &&
1070 !(SLOT_PWRGD(slot_cur->status)))
1071 err("power fault occurred trying to power up\n");
1072 else if (SLOT_BUS_SPEED(slot_cur->status)) {
1073 err("bus speed mismatch occurred. please check "
1074 "current bus speed and card capability\n");
1075 print_card_capability(slot_cur);
1076 } else if (SLOT_BUS_MODE(slot_cur->ext_status)) {
1077 err("bus mode mismatch occurred. please check "
1078 "current bus mode and card capability\n");
1079 print_card_capability(slot_cur);
1081 ibmphp_update_slot_info(slot_cur);
1084 debug("after power_on\n");
1085 /*-----------------------debugging---------------------------*/
1086 get_cur_bus_info(&slot_cur);
1087 debug("the current bus speed right after power_on = %x\n",
1088 slot_cur->bus_on->current_speed);
1089 /*----------------------------------------------------------*/
1091 rc = slot_update(&slot_cur);
1096 if (SLOT_POWER(slot_cur->status) && !(SLOT_PWRGD(slot_cur->status))) {
1097 err("power fault occurred trying to power up...\n");
1100 if (SLOT_POWER(slot_cur->status) && (SLOT_BUS_SPEED(slot_cur->status))) {
1101 err("bus speed mismatch occurred. please check current bus "
1102 "speed and card capability\n");
1103 print_card_capability(slot_cur);
1106 /* Don't think this case will happen after above checks...
1107 * but just in case, for paranoia sake */
1108 if (!(SLOT_POWER(slot_cur->status))) {
1109 err("power on failed...\n");
1113 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1114 if (!slot_cur->func) {
1115 /* We cannot do update_slot_info here, since no memory for
1116 * kmalloc n.e.ways, and update_slot_info allocates some */
1117 err("out of system memory\n");
1121 slot_cur->func->busno = slot_cur->bus;
1122 slot_cur->func->device = slot_cur->device;
1123 for (i = 0; i < 4; i++)
1124 slot_cur->func->irq[i] = slot_cur->irq[i];
1126 debug("b4 configure_card, slot_cur->bus = %x, slot_cur->device = %x\n",
1127 slot_cur->bus, slot_cur->device);
1129 if (ibmphp_configure_card(slot_cur->func, slot_cur->number)) {
1130 err("configure_card was unsuccessful...\n");
1131 /* true because don't need to actually deallocate resources,
1132 * just remove references */
1133 ibmphp_unconfigure_card(&slot_cur, 1);
1134 debug("after unconfigure_card\n");
1135 slot_cur->func = NULL;
1142 tmp_func = ibm_slot_find(slot_cur->bus, slot_cur->func->device,
1144 if (tmp_func && !(tmp_func->dev))
1145 ibm_configure_device(tmp_func);
1149 if (slot_update(&slot_cur)) {
1153 ibmphp_print_test();
1154 rc = ibmphp_update_slot_info(slot_cur);
1156 ibmphp_unlock_operations();
1160 attn_off(slot_cur); /* need to turn off if was blinking b4 */
1163 rcpr = slot_update(&slot_cur);
1168 ibmphp_update_slot_info(slot_cur);
1172 attn_off(slot_cur); /* need to turn off if was blinking b4 */
1174 rcpr = power_off(slot_cur);
1182 /**************************************************************
1183 * HOT REMOVING ADAPTER CARD *
1184 * INPUT: POINTER TO THE HOTPLUG SLOT STRUCTURE *
1185 * OUTPUT: SUCCESS 0 ; FAILURE: UNCONFIGURE , VALIDATE *
1187 **************************************************************/
1188 static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot)
1190 struct slot *slot = hotplug_slot->private;
1193 ibmphp_lock_operations();
1194 rc = ibmphp_do_disable_slot(slot);
1195 ibmphp_unlock_operations();
1199 int ibmphp_do_disable_slot(struct slot *slot_cur)
1204 debug("DISABLING SLOT...\n");
1206 if ((slot_cur == NULL) || (slot_cur->ctrl == NULL)) {
1210 flag = slot_cur->flag;
1214 rc = validate(slot_cur, DISABLE);
1215 /* checking if powered off already & valid slot # */
1219 attn_LED_blink(slot_cur);
1221 if (slot_cur->func == NULL) {
1222 /* We need this for functions that were there on bootup */
1223 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1224 if (!slot_cur->func) {
1225 err("out of system memory\n");
1229 slot_cur->func->busno = slot_cur->bus;
1230 slot_cur->func->device = slot_cur->device;
1233 ibm_unconfigure_device(slot_cur->func);
1236 * If we got here from latch suddenly opening on operating card or
1237 * a power fault, there's no power to the card, so cannot
1238 * read from it to determine what resources it occupied. This operation
1239 * is forbidden anyhow. The best we can do is remove it from kernel
1247 rc = ibmphp_unconfigure_card(&slot_cur, 0);
1248 slot_cur->func = NULL;
1249 debug("in disable_slot. after unconfigure_card\n");
1251 err("could not unconfigure card.\n");
1255 rc = ibmphp_hpc_writeslot(slot_cur, HPC_SLOT_OFF);
1260 rc = slot_update(&slot_cur);
1264 rc = ibmphp_update_slot_info(slot_cur);
1265 ibmphp_print_test();
1270 /* Need to turn off if was blinking b4 */
1273 if (slot_update(&slot_cur)) {
1278 ibmphp_update_slot_info(slot_cur);
1282 struct hotplug_slot_ops ibmphp_hotplug_slot_ops = {
1283 .set_attention_status = set_attention_status,
1284 .enable_slot = enable_slot,
1285 .disable_slot = ibmphp_disable_slot,
1286 .hardware_test = NULL,
1287 .get_power_status = get_power_status,
1288 .get_attention_status = get_attention_status,
1289 .get_latch_status = get_latch_status,
1290 .get_adapter_status = get_adapter_present,
1291 /* .get_max_adapter_speed = get_max_adapter_speed,
1292 .get_bus_name_status = get_bus_name,
1296 static void ibmphp_unload(void)
1299 debug("after slots\n");
1300 ibmphp_free_resources();
1301 debug("after resources\n");
1302 ibmphp_free_bus_info_queue();
1303 debug("after bus info\n");
1304 ibmphp_free_ebda_hpc_queue();
1305 debug("after ebda hpc\n");
1306 ibmphp_free_ebda_pci_rsrc_queue();
1307 debug("after ebda pci rsrc\n");
1308 kfree(ibmphp_pci_bus);
1311 static int __init ibmphp_init(void)
1313 struct pci_bus *bus;
1319 info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
1321 ibmphp_pci_bus = kmalloc(sizeof(*ibmphp_pci_bus), GFP_KERNEL);
1322 if (!ibmphp_pci_bus) {
1323 err("out of memory\n");
1328 bus = pci_find_bus(0, 0);
1330 err("Can't find the root pci bus, can not continue\n");
1334 memcpy(ibmphp_pci_bus, bus, sizeof(*ibmphp_pci_bus));
1336 ibmphp_debug = debug;
1338 ibmphp_hpc_initvars();
1340 for (i = 0; i < 16; i++)
1343 if ((rc = ibmphp_access_ebda()))
1345 debug("after ibmphp_access_ebda()\n");
1347 if ((rc = ibmphp_rsrc_init()))
1349 debug("AFTER Resource & EBDA INITIALIZATIONS\n");
1351 max_slots = get_max_slots();
1353 if ((rc = ibmphp_register_pci()))
1361 ibmphp_print_test();
1362 if ((rc = ibmphp_hpc_start_poll_thread())) {
1374 static void __exit ibmphp_exit(void)
1376 ibmphp_hpc_stop_poll_thread();
1377 debug("after polling\n");
1382 module_init(ibmphp_init);
1383 module_exit(ibmphp_exit);