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 */
39 #include <asm/io_apic.h>
42 #define attn_on(sl) ibmphp_hpc_writeslot (sl, HPC_SLOT_ATTNON)
43 #define attn_off(sl) ibmphp_hpc_writeslot (sl, HPC_SLOT_ATTNOFF)
44 #define attn_LED_blink(sl) ibmphp_hpc_writeslot (sl, HPC_SLOT_BLINKLED)
45 #define get_ctrl_revision(sl, rev) ibmphp_hpc_readslot (sl, READ_REVLEVEL, rev)
46 #define get_hpc_options(sl, opt) ibmphp_hpc_readslot (sl, READ_HPCOPTIONS, opt)
48 #define DRIVER_VERSION "0.6"
49 #define DRIVER_DESC "IBM Hot Plug PCI Controller Driver"
54 module_param(debug, bool, S_IRUGO | S_IWUSR);
55 MODULE_PARM_DESC (debug, "Debugging mode enabled or not");
56 MODULE_LICENSE ("GPL");
57 MODULE_DESCRIPTION (DRIVER_DESC);
59 struct pci_bus *ibmphp_pci_bus;
62 static int irqs[16]; /* PIC mode IRQs we're using so far (in case MPS
63 * tables don't provide default info for empty slots */
68 static int get_max_adapter_speed_1 (struct hotplug_slot *, u8 *, u8);
70 static inline int get_max_adapter_speed (struct hotplug_slot *hs, u8 *value)
72 return get_max_adapter_speed_1 (hs, value, 1);
75 static inline int get_cur_bus_info(struct slot **sl)
78 struct slot *slot_cur = *sl;
80 debug("options = %x\n", slot_cur->ctrl->options);
81 debug("revision = %x\n", slot_cur->ctrl->revision);
83 if (READ_BUS_STATUS(slot_cur->ctrl))
84 rc = ibmphp_hpc_readslot(slot_cur, READ_BUSSTATUS, NULL);
89 slot_cur->bus_on->current_speed = CURRENT_BUS_SPEED(slot_cur->busstatus);
90 if (READ_BUS_MODE(slot_cur->ctrl))
91 slot_cur->bus_on->current_bus_mode =
92 CURRENT_BUS_MODE(slot_cur->busstatus);
94 slot_cur->bus_on->current_bus_mode = 0xFF;
96 debug("busstatus = %x, bus_speed = %x, bus_mode = %x\n",
98 slot_cur->bus_on->current_speed,
99 slot_cur->bus_on->current_bus_mode);
105 static inline int slot_update(struct slot **sl)
108 rc = ibmphp_hpc_readslot(*sl, READ_ALLSTAT, NULL);
112 rc = get_cur_bus_info(sl);
116 static int __init get_max_slots (void)
118 struct slot *slot_cur;
119 struct list_head *tmp;
122 list_for_each(tmp, &ibmphp_slot_head) {
123 slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
124 /* sometimes the hot-pluggable slots start with 4 (not always from 1) */
125 slot_count = max(slot_count, slot_cur->number);
130 /* This routine will put the correct slot->device information per slot. It's
131 * called from initialization of the slot structures. It will also assign
132 * interrupt numbers per each slot.
133 * Parameters: struct slot
134 * Returns 0 or errors
136 int ibmphp_init_devno(struct slot **cur_slot)
138 struct irq_routing_table *rtable;
143 rtable = pcibios_get_irq_routing_table();
145 err("no BIOS routing table...\n");
149 len = (rtable->size - sizeof(struct irq_routing_table)) /
150 sizeof(struct irq_info);
156 for (loop = 0; loop < len; loop++) {
157 if ((*cur_slot)->number == rtable->slots[loop].slot &&
158 (*cur_slot)->bus == rtable->slots[loop].bus) {
159 (*cur_slot)->device = PCI_SLOT(rtable->slots[loop].devfn);
160 for (i = 0; i < 4; i++)
161 (*cur_slot)->irq[i] = IO_APIC_get_PCI_irq_vector((int) (*cur_slot)->bus,
162 (int) (*cur_slot)->device, i);
164 debug("(*cur_slot)->irq[0] = %x\n",
165 (*cur_slot)->irq[0]);
166 debug("(*cur_slot)->irq[1] = %x\n",
167 (*cur_slot)->irq[1]);
168 debug("(*cur_slot)->irq[2] = %x\n",
169 (*cur_slot)->irq[2]);
170 debug("(*cur_slot)->irq[3] = %x\n",
171 (*cur_slot)->irq[3]);
173 debug("rtable->exclusive_irqs = %x\n",
174 rtable->exclusive_irqs);
175 debug("rtable->slots[loop].irq[0].bitmap = %x\n",
176 rtable->slots[loop].irq[0].bitmap);
177 debug("rtable->slots[loop].irq[1].bitmap = %x\n",
178 rtable->slots[loop].irq[1].bitmap);
179 debug("rtable->slots[loop].irq[2].bitmap = %x\n",
180 rtable->slots[loop].irq[2].bitmap);
181 debug("rtable->slots[loop].irq[3].bitmap = %x\n",
182 rtable->slots[loop].irq[3].bitmap);
184 debug("rtable->slots[loop].irq[0].link = %x\n",
185 rtable->slots[loop].irq[0].link);
186 debug("rtable->slots[loop].irq[1].link = %x\n",
187 rtable->slots[loop].irq[1].link);
188 debug("rtable->slots[loop].irq[2].link = %x\n",
189 rtable->slots[loop].irq[2].link);
190 debug("rtable->slots[loop].irq[3].link = %x\n",
191 rtable->slots[loop].irq[3].link);
192 debug("end of init_devno\n");
202 static inline int power_on(struct slot *slot_cur)
204 u8 cmd = HPC_SLOT_ON;
207 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
209 err("power on failed\n");
212 if (CTLR_RESULT(slot_cur->ctrl->status)) {
213 err("command not completed successfully in power_on\n");
216 msleep(3000); /* For ServeRAID cards, and some 66 PCI */
220 static inline int power_off(struct slot *slot_cur)
222 u8 cmd = HPC_SLOT_OFF;
225 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
227 err("power off failed\n");
230 if (CTLR_RESULT(slot_cur->ctrl->status)) {
231 err("command not completed successfully in power_off\n");
237 static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
241 u8 cmd = 0x00; /* avoid compiler warning */
243 debug("set_attention_status - Entry hotplug_slot[%lx] value[%x]\n",
244 (ulong) hotplug_slot, value);
245 ibmphp_lock_operations();
250 case HPC_SLOT_ATTN_OFF:
251 cmd = HPC_SLOT_ATTNOFF;
253 case HPC_SLOT_ATTN_ON:
254 cmd = HPC_SLOT_ATTNON;
256 case HPC_SLOT_ATTN_BLINK:
257 cmd = HPC_SLOT_BLINKLED;
261 err("set_attention_status - Error : invalid input [%x]\n",
266 pslot = hotplug_slot->private;
268 rc = ibmphp_hpc_writeslot(pslot, cmd);
275 ibmphp_unlock_operations();
277 debug("set_attention_status - Exit rc[%d]\n", rc);
281 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
287 debug("get_attention_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
288 (ulong) hotplug_slot, (ulong) value);
290 ibmphp_lock_operations();
292 pslot = hotplug_slot->private;
294 memcpy(&myslot, pslot, sizeof(struct slot));
295 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
298 rc = ibmphp_hpc_readslot(pslot,
300 &(myslot.ext_status));
302 *value = SLOT_ATTN(myslot.status,
307 ibmphp_unlock_operations();
308 debug("get_attention_status - Exit rc[%d] value[%x]\n", rc, *value);
312 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
318 debug("get_latch_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
319 (ulong) hotplug_slot, (ulong) value);
320 ibmphp_lock_operations();
322 pslot = hotplug_slot->private;
324 memcpy(&myslot, pslot, sizeof(struct slot));
325 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
328 *value = SLOT_LATCH(myslot.status);
332 ibmphp_unlock_operations();
333 debug("get_latch_status - Exit rc[%d] rc[%x] value[%x]\n",
339 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
345 debug("get_power_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
346 (ulong) hotplug_slot, (ulong) value);
347 ibmphp_lock_operations();
349 pslot = hotplug_slot->private;
351 memcpy(&myslot, pslot, sizeof(struct slot));
352 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
355 *value = SLOT_PWRGD(myslot.status);
359 ibmphp_unlock_operations();
360 debug("get_power_status - Exit rc[%d] rc[%x] value[%x]\n",
365 static int get_adapter_present(struct hotplug_slot *hotplug_slot, u8 *value)
372 debug("get_adapter_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
373 (ulong) hotplug_slot, (ulong) value);
374 ibmphp_lock_operations();
376 pslot = hotplug_slot->private;
378 memcpy(&myslot, pslot, sizeof(struct slot));
379 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
382 present = SLOT_PRESENT(myslot.status);
383 if (present == HPC_SLOT_EMPTY)
391 ibmphp_unlock_operations();
392 debug("get_adapter_present - Exit rc[%d] value[%x]\n", rc, *value);
396 static int get_max_bus_speed(struct slot *slot)
400 enum pci_bus_speed speed;
401 struct pci_bus *bus = slot->hotplug_slot->pci_slot->bus;
403 debug("%s - Entry slot[%p]\n", __func__, slot);
405 ibmphp_lock_operations();
406 mode = slot->supported_bus_mode;
407 speed = slot->supported_speed;
408 ibmphp_unlock_operations();
414 if (mode == BUS_MODE_PCIX)
422 /* Note (will need to change): there would be soon 256, 512 also */
427 bus->max_bus_speed = speed;
429 debug("%s - Exit rc[%d] speed[%x]\n", __func__, rc, speed);
434 static int get_max_adapter_speed_1(struct hotplug_slot *hotplug_slot, u8 *value, u8 flag)
440 debug("get_max_adapter_speed_1 - Entry hotplug_slot[%lx] pvalue[%lx]\n",
441 (ulong)hotplug_slot, (ulong) value);
444 ibmphp_lock_operations();
446 if (hotplug_slot && value) {
447 pslot = hotplug_slot->private;
449 memcpy(&myslot, pslot, sizeof(struct slot));
450 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
453 if (!(SLOT_LATCH (myslot.status)) &&
454 (SLOT_PRESENT (myslot.status))) {
455 rc = ibmphp_hpc_readslot(pslot,
457 &(myslot.ext_status));
459 *value = SLOT_SPEED(myslot.ext_status);
461 *value = MAX_ADAPTER_NONE;
466 ibmphp_unlock_operations();
468 debug("get_max_adapter_speed_1 - Exit rc[%d] value[%x]\n", rc, *value);
472 static int get_bus_name(struct hotplug_slot *hotplug_slot, char *value)
475 struct slot *pslot = NULL;
477 debug("get_bus_name - Entry hotplug_slot[%lx]\n", (ulong)hotplug_slot);
479 ibmphp_lock_operations();
482 pslot = hotplug_slot->private;
485 snprintf(value, 100, "Bus %x", pslot->bus);
490 ibmphp_unlock_operations();
491 debug("get_bus_name - Exit rc[%d] value[%x]\n", rc, *value);
496 /****************************************************************************
497 * This routine will initialize the ops data structure used in the validate
498 * function. It will also power off empty slots that are powered on since BIOS
499 * leaves those on, albeit disconnected
500 ****************************************************************************/
501 static int __init init_ops(void)
503 struct slot *slot_cur;
504 struct list_head *tmp;
508 list_for_each(tmp, &ibmphp_slot_head) {
509 slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
514 debug("BEFORE GETTING SLOT STATUS, slot # %x\n",
516 if (slot_cur->ctrl->revision == 0xFF)
517 if (get_ctrl_revision(slot_cur,
518 &slot_cur->ctrl->revision))
521 if (slot_cur->bus_on->current_speed == 0xFF)
522 if (get_cur_bus_info(&slot_cur))
524 get_max_bus_speed(slot_cur);
526 if (slot_cur->ctrl->options == 0xFF)
527 if (get_hpc_options(slot_cur, &slot_cur->ctrl->options))
530 retval = slot_update(&slot_cur);
534 debug("status = %x\n", slot_cur->status);
535 debug("ext_status = %x\n", slot_cur->ext_status);
536 debug("SLOT_POWER = %x\n", SLOT_POWER(slot_cur->status));
537 debug("SLOT_PRESENT = %x\n", SLOT_PRESENT(slot_cur->status));
538 debug("SLOT_LATCH = %x\n", SLOT_LATCH(slot_cur->status));
540 if ((SLOT_PWRGD(slot_cur->status)) &&
541 !(SLOT_PRESENT(slot_cur->status)) &&
542 !(SLOT_LATCH(slot_cur->status))) {
543 debug("BEFORE POWER OFF COMMAND\n");
544 rc = power_off(slot_cur);
548 /* retval = slot_update(&slot_cur);
551 * ibmphp_update_slot_info(slot_cur);
559 /* This operation will check whether the slot is within the bounds and
560 * the operation is valid to perform on that slot
561 * Parameters: slot, operation
562 * Returns: 0 or error codes
564 static int validate(struct slot *slot_cur, int opn)
571 number = slot_cur->number;
572 if ((number > max_slots) || (number < 0))
574 debug("slot_number in validate is %d\n", slot_cur->number);
576 retval = slot_update(&slot_cur);
582 if (!(SLOT_PWRGD(slot_cur->status)) &&
583 (SLOT_PRESENT(slot_cur->status)) &&
584 !(SLOT_LATCH(slot_cur->status)))
588 if ((SLOT_PWRGD(slot_cur->status)) &&
589 (SLOT_PRESENT(slot_cur->status)) &&
590 !(SLOT_LATCH(slot_cur->status)))
596 err("validate failed....\n");
600 /****************************************************************************
601 * This routine is for updating the data structures in the hotplug core
602 * Parameters: struct slot
603 * Returns: 0 or error
604 ****************************************************************************/
605 int ibmphp_update_slot_info(struct slot *slot_cur)
607 struct hotplug_slot_info *info;
608 struct pci_bus *bus = slot_cur->hotplug_slot->pci_slot->bus;
613 info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
615 err("out of system memory\n");
619 info->power_status = SLOT_PWRGD(slot_cur->status);
620 info->attention_status = SLOT_ATTN(slot_cur->status,
621 slot_cur->ext_status);
622 info->latch_status = SLOT_LATCH(slot_cur->status);
623 if (!SLOT_PRESENT(slot_cur->status)) {
624 info->adapter_status = 0;
625 /* info->max_adapter_speed_status = MAX_ADAPTER_NONE; */
627 info->adapter_status = 1;
628 /* get_max_adapter_speed_1(slot_cur->hotplug_slot,
629 &info->max_adapter_speed_status, 0); */
632 bus_speed = slot_cur->bus_on->current_speed;
633 mode = slot_cur->bus_on->current_bus_mode;
639 if (mode == BUS_MODE_PCIX)
641 else if (mode == BUS_MODE_PCI)
644 bus_speed = PCI_SPEED_UNKNOWN;
651 bus_speed = PCI_SPEED_UNKNOWN;
654 bus->cur_bus_speed = bus_speed;
657 rc = pci_hp_change_slot_info(slot_cur->hotplug_slot, info);
663 /******************************************************************************
664 * This function will return the pci_func, given bus and devfunc, or NULL. It
665 * is called from visit routines
666 ******************************************************************************/
668 static struct pci_func *ibm_slot_find(u8 busno, u8 device, u8 function)
670 struct pci_func *func_cur;
671 struct slot *slot_cur;
672 struct list_head *tmp;
673 list_for_each(tmp, &ibmphp_slot_head) {
674 slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
675 if (slot_cur->func) {
676 func_cur = slot_cur->func;
678 if ((func_cur->busno == busno) &&
679 (func_cur->device == device) &&
680 (func_cur->function == function))
682 func_cur = func_cur->next;
689 /*************************************************************
690 * This routine frees up memory used by struct slot, including
691 * the pointers to pci_func, bus, hotplug_slot, controller,
692 * and deregistering from the hotplug core
693 *************************************************************/
694 static void free_slots(void)
696 struct slot *slot_cur;
697 struct list_head *tmp;
698 struct list_head *next;
700 debug("%s -- enter\n", __func__);
702 list_for_each_safe(tmp, next, &ibmphp_slot_head) {
703 slot_cur = list_entry(tmp, struct slot, ibm_slot_list);
704 pci_hp_deregister(slot_cur->hotplug_slot);
706 debug("%s -- exit\n", __func__);
709 static void ibm_unconfigure_device(struct pci_func *func)
711 struct pci_dev *temp;
714 debug("inside %s\n", __func__);
715 debug("func->device = %x, func->function = %x\n",
716 func->device, func->function);
717 debug("func->device << 3 | 0x0 = %x\n", func->device << 3 | 0x0);
719 pci_lock_rescan_remove();
721 for (j = 0; j < 0x08; j++) {
722 temp = pci_get_bus_and_slot(func->busno, (func->device << 3) | j);
724 pci_stop_and_remove_bus_device(temp);
729 pci_dev_put(func->dev);
731 pci_unlock_rescan_remove();
735 * The following function is to fix kernel bug regarding
736 * getting bus entries, here we manually add those primary
737 * bus entries to kernel bus structure whenever apply
739 static u8 bus_structure_fixup(u8 busno)
745 if (pci_find_bus(0, busno) || !(ibmphp_find_same_bus_num(busno)))
748 bus = kmalloc(sizeof(*bus), GFP_KERNEL);
750 err("%s - out of memory\n", __func__);
753 dev = kmalloc(sizeof(*dev), GFP_KERNEL);
756 err("%s - out of memory\n", __func__);
761 bus->ops = ibmphp_pci_bus->ops;
763 for (dev->devfn = 0; dev->devfn < 256; dev->devfn += 8) {
764 if (!pci_read_config_word(dev, PCI_VENDOR_ID, &l) &&
765 (l != 0x0000) && (l != 0xffff)) {
766 debug("%s - Inside bus_structure_fixup()\n",
768 pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
779 static int ibm_configure_device(struct pci_func *func)
781 struct pci_bus *child;
783 int flag = 0; /* this is to make sure we don't double scan the bus,
784 for bridged devices primarily */
786 pci_lock_rescan_remove();
788 if (!(bus_structure_fixup(func->busno)))
790 if (func->dev == NULL)
791 func->dev = pci_get_bus_and_slot(func->busno,
792 PCI_DEVFN(func->device, func->function));
794 if (func->dev == NULL) {
795 struct pci_bus *bus = pci_find_bus(0, func->busno);
799 num = pci_scan_slot(bus,
800 PCI_DEVFN(func->device, func->function));
802 pci_bus_add_devices(bus);
804 func->dev = pci_get_bus_and_slot(func->busno,
805 PCI_DEVFN(func->device, func->function));
806 if (func->dev == NULL) {
807 err("ERROR... : pci_dev still NULL\n");
811 if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) {
812 pci_hp_add_bridge(func->dev);
813 child = func->dev->subordinate;
815 pci_bus_add_devices(child);
819 pci_unlock_rescan_remove();
823 /*******************************************************
824 * Returns whether the bus is empty or not
825 *******************************************************/
826 static int is_bus_empty(struct slot *slot_cur)
829 struct slot *tmp_slot;
830 u8 i = slot_cur->bus_on->slot_min;
832 while (i <= slot_cur->bus_on->slot_max) {
833 if (i == slot_cur->number) {
837 tmp_slot = ibmphp_get_slot_from_physical_num(i);
840 rc = slot_update(&tmp_slot);
843 if (SLOT_PRESENT(tmp_slot->status) &&
844 SLOT_PWRGD(tmp_slot->status))
851 /***********************************************************
852 * If the HPC permits and the bus currently empty, tries to set the
853 * bus speed and mode at the maximum card and bus capability
855 * Returns: bus is set (0) or error code
856 ***********************************************************/
857 static int set_bus(struct slot *slot_cur)
863 static struct pci_device_id ciobx[] = {
864 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, 0x0101) },
868 debug("%s - entry slot # %d\n", __func__, slot_cur->number);
869 if (SET_BUS_STATUS(slot_cur->ctrl) && is_bus_empty(slot_cur)) {
870 rc = slot_update(&slot_cur);
873 speed = SLOT_SPEED(slot_cur->ext_status);
874 debug("ext_status = %x, speed = %x\n", slot_cur->ext_status, speed);
876 case HPC_SLOT_SPEED_33:
877 cmd = HPC_BUS_33CONVMODE;
879 case HPC_SLOT_SPEED_66:
880 if (SLOT_PCIX(slot_cur->ext_status)) {
881 if ((slot_cur->supported_speed >= BUS_SPEED_66) &&
882 (slot_cur->supported_bus_mode == BUS_MODE_PCIX))
883 cmd = HPC_BUS_66PCIXMODE;
884 else if (!SLOT_BUS_MODE(slot_cur->ext_status))
885 /* if max slot/bus capability is 66 pci
886 and there's no bus mode mismatch, then
887 the adapter supports 66 pci */
888 cmd = HPC_BUS_66CONVMODE;
890 cmd = HPC_BUS_33CONVMODE;
892 if (slot_cur->supported_speed >= BUS_SPEED_66)
893 cmd = HPC_BUS_66CONVMODE;
895 cmd = HPC_BUS_33CONVMODE;
898 case HPC_SLOT_SPEED_133:
899 switch (slot_cur->supported_speed) {
901 cmd = HPC_BUS_33CONVMODE;
904 if (slot_cur->supported_bus_mode == BUS_MODE_PCIX)
905 cmd = HPC_BUS_66PCIXMODE;
907 cmd = HPC_BUS_66CONVMODE;
910 cmd = HPC_BUS_100PCIXMODE;
913 /* This is to take care of the bug in CIOBX chip */
914 if (pci_dev_present(ciobx))
915 ibmphp_hpc_writeslot(slot_cur,
916 HPC_BUS_100PCIXMODE);
917 cmd = HPC_BUS_133PCIXMODE;
920 err("Wrong bus speed\n");
925 err("wrong slot speed\n");
928 debug("setting bus speed for slot %d, cmd %x\n",
929 slot_cur->number, cmd);
930 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
932 err("setting bus speed failed\n");
935 if (CTLR_RESULT(slot_cur->ctrl->status)) {
936 err("command not completed successfully in set_bus\n");
940 /* This is for x440, once Brandon fixes the firmware,
941 will not need this delay */
943 debug("%s -Exit\n", __func__);
947 /* This routine checks the bus limitations that the slot is on from the BIOS.
948 * This is used in deciding whether or not to power up the slot.
949 * (electrical/spec limitations. For example, >1 133 MHz or >2 66 PCI cards on
952 * Returns: 0 = no limitations, -EINVAL = exceeded limitations on the bus
954 static int check_limitations(struct slot *slot_cur)
957 struct slot *tmp_slot;
961 for (i = slot_cur->bus_on->slot_min; i <= slot_cur->bus_on->slot_max; i++) {
962 tmp_slot = ibmphp_get_slot_from_physical_num(i);
965 if ((SLOT_PWRGD(tmp_slot->status)) &&
966 !(SLOT_CONNECT(tmp_slot->status)))
969 get_cur_bus_info(&slot_cur);
970 switch (slot_cur->bus_on->current_speed) {
972 limitation = slot_cur->bus_on->slots_at_33_conv;
975 if (slot_cur->bus_on->current_bus_mode == BUS_MODE_PCIX)
976 limitation = slot_cur->bus_on->slots_at_66_pcix;
978 limitation = slot_cur->bus_on->slots_at_66_conv;
981 limitation = slot_cur->bus_on->slots_at_100_pcix;
984 limitation = slot_cur->bus_on->slots_at_133_pcix;
988 if ((count + 1) > limitation)
993 static inline void print_card_capability(struct slot *slot_cur)
995 info("capability of the card is ");
996 if ((slot_cur->ext_status & CARD_INFO) == PCIX133)
997 info(" 133 MHz PCI-X\n");
998 else if ((slot_cur->ext_status & CARD_INFO) == PCIX66)
999 info(" 66 MHz PCI-X\n");
1000 else if ((slot_cur->ext_status & CARD_INFO) == PCI66)
1001 info(" 66 MHz PCI\n");
1003 info(" 33 MHz PCI\n");
1007 /* This routine will power on the slot, configure the device(s) and find the
1009 * Parameters: hotplug_slot
1010 * Returns: 0 or failure codes
1012 static int enable_slot(struct hotplug_slot *hs)
1015 struct slot *slot_cur;
1017 struct pci_func *tmp_func;
1019 ibmphp_lock_operations();
1021 debug("ENABLING SLOT........\n");
1022 slot_cur = hs->private;
1024 rc = validate(slot_cur, ENABLE);
1026 err("validate function failed\n");
1030 attn_LED_blink(slot_cur);
1032 rc = set_bus(slot_cur);
1034 err("was not able to set the bus\n");
1038 /*-----------------debugging------------------------------*/
1039 get_cur_bus_info(&slot_cur);
1040 debug("the current bus speed right after set_bus = %x\n",
1041 slot_cur->bus_on->current_speed);
1042 /*----------------------------------------------------------*/
1044 rc = check_limitations(slot_cur);
1046 err("Adding this card exceeds the limitations of this bus.\n");
1047 err("(i.e., >1 133MHz cards running on same bus, or >2 66 PCI cards running on same bus.\n");
1048 err("Try hot-adding into another bus\n");
1053 rc = power_on(slot_cur);
1056 err("something wrong when powering up... please see below for details\n");
1057 /* need to turn off before on, otherwise, blinking overwrites */
1060 if (slot_update(&slot_cur)) {
1066 /* Check to see the error of why it failed */
1067 if ((SLOT_POWER(slot_cur->status)) &&
1068 !(SLOT_PWRGD(slot_cur->status)))
1069 err("power fault occurred trying to power up\n");
1070 else if (SLOT_BUS_SPEED(slot_cur->status)) {
1071 err("bus speed mismatch occurred. please check current bus speed and card capability\n");
1072 print_card_capability(slot_cur);
1073 } else if (SLOT_BUS_MODE(slot_cur->ext_status)) {
1074 err("bus mode mismatch occurred. please check current bus mode and card capability\n");
1075 print_card_capability(slot_cur);
1077 ibmphp_update_slot_info(slot_cur);
1080 debug("after power_on\n");
1081 /*-----------------------debugging---------------------------*/
1082 get_cur_bus_info(&slot_cur);
1083 debug("the current bus speed right after power_on = %x\n",
1084 slot_cur->bus_on->current_speed);
1085 /*----------------------------------------------------------*/
1087 rc = slot_update(&slot_cur);
1092 if (SLOT_POWER(slot_cur->status) && !(SLOT_PWRGD(slot_cur->status))) {
1093 err("power fault occurred trying to power up...\n");
1096 if (SLOT_POWER(slot_cur->status) && (SLOT_BUS_SPEED(slot_cur->status))) {
1097 err("bus speed mismatch occurred. please check current bus speed and card capability\n");
1098 print_card_capability(slot_cur);
1101 /* Don't think this case will happen after above checks...
1102 * but just in case, for paranoia sake */
1103 if (!(SLOT_POWER(slot_cur->status))) {
1104 err("power on failed...\n");
1108 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1109 if (!slot_cur->func) {
1110 /* We cannot do update_slot_info here, since no memory for
1111 * kmalloc n.e.ways, and update_slot_info allocates some */
1112 err("out of system memory\n");
1116 slot_cur->func->busno = slot_cur->bus;
1117 slot_cur->func->device = slot_cur->device;
1118 for (i = 0; i < 4; i++)
1119 slot_cur->func->irq[i] = slot_cur->irq[i];
1121 debug("b4 configure_card, slot_cur->bus = %x, slot_cur->device = %x\n",
1122 slot_cur->bus, slot_cur->device);
1124 if (ibmphp_configure_card(slot_cur->func, slot_cur->number)) {
1125 err("configure_card was unsuccessful...\n");
1126 /* true because don't need to actually deallocate resources,
1127 * just remove references */
1128 ibmphp_unconfigure_card(&slot_cur, 1);
1129 debug("after unconfigure_card\n");
1130 slot_cur->func = NULL;
1137 tmp_func = ibm_slot_find(slot_cur->bus, slot_cur->func->device,
1139 if (tmp_func && !(tmp_func->dev))
1140 ibm_configure_device(tmp_func);
1144 if (slot_update(&slot_cur)) {
1148 ibmphp_print_test();
1149 rc = ibmphp_update_slot_info(slot_cur);
1151 ibmphp_unlock_operations();
1155 attn_off(slot_cur); /* need to turn off if was blinking b4 */
1158 rcpr = slot_update(&slot_cur);
1163 ibmphp_update_slot_info(slot_cur);
1167 attn_off(slot_cur); /* need to turn off if was blinking b4 */
1169 rcpr = power_off(slot_cur);
1177 /**************************************************************
1178 * HOT REMOVING ADAPTER CARD *
1179 * INPUT: POINTER TO THE HOTPLUG SLOT STRUCTURE *
1180 * OUTPUT: SUCCESS 0 ; FAILURE: UNCONFIGURE , VALIDATE *
1182 **************************************************************/
1183 static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot)
1185 struct slot *slot = hotplug_slot->private;
1188 ibmphp_lock_operations();
1189 rc = ibmphp_do_disable_slot(slot);
1190 ibmphp_unlock_operations();
1194 int ibmphp_do_disable_slot(struct slot *slot_cur)
1199 debug("DISABLING SLOT...\n");
1201 if ((slot_cur == NULL) || (slot_cur->ctrl == NULL))
1204 flag = slot_cur->flag;
1208 rc = validate(slot_cur, DISABLE);
1209 /* checking if powered off already & valid slot # */
1213 attn_LED_blink(slot_cur);
1215 if (slot_cur->func == NULL) {
1216 /* We need this for functions that were there on bootup */
1217 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1218 if (!slot_cur->func) {
1219 err("out of system memory\n");
1223 slot_cur->func->busno = slot_cur->bus;
1224 slot_cur->func->device = slot_cur->device;
1227 ibm_unconfigure_device(slot_cur->func);
1230 * If we got here from latch suddenly opening on operating card or
1231 * a power fault, there's no power to the card, so cannot
1232 * read from it to determine what resources it occupied. This operation
1233 * is forbidden anyhow. The best we can do is remove it from kernel
1241 rc = ibmphp_unconfigure_card(&slot_cur, 0);
1242 slot_cur->func = NULL;
1243 debug("in disable_slot. after unconfigure_card\n");
1245 err("could not unconfigure card.\n");
1249 rc = ibmphp_hpc_writeslot(slot_cur, HPC_SLOT_OFF);
1254 rc = slot_update(&slot_cur);
1258 rc = ibmphp_update_slot_info(slot_cur);
1259 ibmphp_print_test();
1264 /* Need to turn off if was blinking b4 */
1267 if (slot_update(&slot_cur)) {
1272 ibmphp_update_slot_info(slot_cur);
1276 struct hotplug_slot_ops ibmphp_hotplug_slot_ops = {
1277 .set_attention_status = set_attention_status,
1278 .enable_slot = enable_slot,
1279 .disable_slot = ibmphp_disable_slot,
1280 .hardware_test = NULL,
1281 .get_power_status = get_power_status,
1282 .get_attention_status = get_attention_status,
1283 .get_latch_status = get_latch_status,
1284 .get_adapter_status = get_adapter_present,
1285 /* .get_max_adapter_speed = get_max_adapter_speed,
1286 .get_bus_name_status = get_bus_name,
1290 static void ibmphp_unload(void)
1293 debug("after slots\n");
1294 ibmphp_free_resources();
1295 debug("after resources\n");
1296 ibmphp_free_bus_info_queue();
1297 debug("after bus info\n");
1298 ibmphp_free_ebda_hpc_queue();
1299 debug("after ebda hpc\n");
1300 ibmphp_free_ebda_pci_rsrc_queue();
1301 debug("after ebda pci rsrc\n");
1302 kfree(ibmphp_pci_bus);
1305 static int __init ibmphp_init(void)
1307 struct pci_bus *bus;
1313 info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
1315 ibmphp_pci_bus = kmalloc(sizeof(*ibmphp_pci_bus), GFP_KERNEL);
1316 if (!ibmphp_pci_bus) {
1317 err("out of memory\n");
1322 bus = pci_find_bus(0, 0);
1324 err("Can't find the root pci bus, can not continue\n");
1328 memcpy(ibmphp_pci_bus, bus, sizeof(*ibmphp_pci_bus));
1330 ibmphp_debug = debug;
1332 ibmphp_hpc_initvars();
1334 for (i = 0; i < 16; i++)
1337 rc = ibmphp_access_ebda();
1340 debug("after ibmphp_access_ebda()\n");
1342 rc = ibmphp_rsrc_init();
1345 debug("AFTER Resource & EBDA INITIALIZATIONS\n");
1347 max_slots = get_max_slots();
1349 rc = ibmphp_register_pci();
1358 ibmphp_print_test();
1359 rc = ibmphp_hpc_start_poll_thread();
1371 static void __exit ibmphp_exit(void)
1373 ibmphp_hpc_stop_poll_thread();
1374 debug("after polling\n");
1379 module_init(ibmphp_init);
1380 module_exit(ibmphp_exit);