1 // SPDX-License-Identifier: GPL-2.0+
3 * IBM Hot Plug Controller Driver
5 * Written By: Chuck Cole, Jyoti Shah, Tong Yu, Irene Zubarev, IBM Corporation
8 * Copyright (C) 2001-2003 IBM Corp.
10 * All rights reserved.
16 #include <linux/init.h>
17 #include <linux/module.h>
18 #include <linux/slab.h>
19 #include <linux/pci.h>
20 #include <linux/interrupt.h>
21 #include <linux/delay.h>
22 #include <linux/wait.h>
24 #include <asm/pci_x86.h> /* for struct irq_routing_table */
25 #include <asm/io_apic.h>
28 #define attn_on(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_ATTNON)
29 #define attn_off(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_ATTNOFF)
30 #define attn_LED_blink(sl) ibmphp_hpc_writeslot(sl, HPC_SLOT_BLINKLED)
31 #define get_ctrl_revision(sl, rev) ibmphp_hpc_readslot(sl, READ_REVLEVEL, rev)
32 #define get_hpc_options(sl, opt) ibmphp_hpc_readslot(sl, READ_HPCOPTIONS, opt)
34 #define DRIVER_VERSION "0.6"
35 #define DRIVER_DESC "IBM Hot Plug PCI Controller Driver"
40 module_param(debug, bool, S_IRUGO | S_IWUSR);
41 MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
42 MODULE_LICENSE("GPL");
43 MODULE_DESCRIPTION(DRIVER_DESC);
45 struct pci_bus *ibmphp_pci_bus;
48 static int irqs[16]; /* PIC mode IRQs we're using so far (in case MPS
49 * tables don't provide default info for empty slots */
53 static inline int get_cur_bus_info(struct slot **sl)
56 struct slot *slot_cur = *sl;
58 debug("options = %x\n", slot_cur->ctrl->options);
59 debug("revision = %x\n", slot_cur->ctrl->revision);
61 if (READ_BUS_STATUS(slot_cur->ctrl))
62 rc = ibmphp_hpc_readslot(slot_cur, READ_BUSSTATUS, NULL);
67 slot_cur->bus_on->current_speed = CURRENT_BUS_SPEED(slot_cur->busstatus);
68 if (READ_BUS_MODE(slot_cur->ctrl))
69 slot_cur->bus_on->current_bus_mode =
70 CURRENT_BUS_MODE(slot_cur->busstatus);
72 slot_cur->bus_on->current_bus_mode = 0xFF;
74 debug("busstatus = %x, bus_speed = %x, bus_mode = %x\n",
76 slot_cur->bus_on->current_speed,
77 slot_cur->bus_on->current_bus_mode);
83 static inline int slot_update(struct slot **sl)
86 rc = ibmphp_hpc_readslot(*sl, READ_ALLSTAT, NULL);
90 rc = get_cur_bus_info(sl);
94 static int __init get_max_slots(void)
96 struct slot *slot_cur;
99 list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
100 /* sometimes the hot-pluggable slots start with 4 (not always from 1) */
101 slot_count = max(slot_count, slot_cur->number);
106 /* This routine will put the correct slot->device information per slot. It's
107 * called from initialization of the slot structures. It will also assign
108 * interrupt numbers per each slot.
109 * Parameters: struct slot
110 * Returns 0 or errors
112 int ibmphp_init_devno(struct slot **cur_slot)
114 struct irq_routing_table *rtable;
119 rtable = pcibios_get_irq_routing_table();
121 err("no BIOS routing table...\n");
125 len = (rtable->size - sizeof(struct irq_routing_table)) /
126 sizeof(struct irq_info);
132 for (loop = 0; loop < len; loop++) {
133 if ((*cur_slot)->number == rtable->slots[loop].slot &&
134 (*cur_slot)->bus == rtable->slots[loop].bus) {
135 (*cur_slot)->device = PCI_SLOT(rtable->slots[loop].devfn);
136 for (i = 0; i < 4; i++)
137 (*cur_slot)->irq[i] = IO_APIC_get_PCI_irq_vector((int) (*cur_slot)->bus,
138 (int) (*cur_slot)->device, i);
140 debug("(*cur_slot)->irq[0] = %x\n",
141 (*cur_slot)->irq[0]);
142 debug("(*cur_slot)->irq[1] = %x\n",
143 (*cur_slot)->irq[1]);
144 debug("(*cur_slot)->irq[2] = %x\n",
145 (*cur_slot)->irq[2]);
146 debug("(*cur_slot)->irq[3] = %x\n",
147 (*cur_slot)->irq[3]);
149 debug("rtable->exclusive_irqs = %x\n",
150 rtable->exclusive_irqs);
151 debug("rtable->slots[loop].irq[0].bitmap = %x\n",
152 rtable->slots[loop].irq[0].bitmap);
153 debug("rtable->slots[loop].irq[1].bitmap = %x\n",
154 rtable->slots[loop].irq[1].bitmap);
155 debug("rtable->slots[loop].irq[2].bitmap = %x\n",
156 rtable->slots[loop].irq[2].bitmap);
157 debug("rtable->slots[loop].irq[3].bitmap = %x\n",
158 rtable->slots[loop].irq[3].bitmap);
160 debug("rtable->slots[loop].irq[0].link = %x\n",
161 rtable->slots[loop].irq[0].link);
162 debug("rtable->slots[loop].irq[1].link = %x\n",
163 rtable->slots[loop].irq[1].link);
164 debug("rtable->slots[loop].irq[2].link = %x\n",
165 rtable->slots[loop].irq[2].link);
166 debug("rtable->slots[loop].irq[3].link = %x\n",
167 rtable->slots[loop].irq[3].link);
168 debug("end of init_devno\n");
178 static inline int power_on(struct slot *slot_cur)
180 u8 cmd = HPC_SLOT_ON;
183 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
185 err("power on failed\n");
188 if (CTLR_RESULT(slot_cur->ctrl->status)) {
189 err("command not completed successfully in power_on\n");
192 msleep(3000); /* For ServeRAID cards, and some 66 PCI */
196 static inline int power_off(struct slot *slot_cur)
198 u8 cmd = HPC_SLOT_OFF;
201 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
203 err("power off failed\n");
206 if (CTLR_RESULT(slot_cur->ctrl->status)) {
207 err("command not completed successfully in power_off\n");
213 static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
217 u8 cmd = 0x00; /* avoid compiler warning */
219 debug("set_attention_status - Entry hotplug_slot[%lx] value[%x]\n",
220 (ulong) hotplug_slot, value);
221 ibmphp_lock_operations();
226 case HPC_SLOT_ATTN_OFF:
227 cmd = HPC_SLOT_ATTNOFF;
229 case HPC_SLOT_ATTN_ON:
230 cmd = HPC_SLOT_ATTNON;
232 case HPC_SLOT_ATTN_BLINK:
233 cmd = HPC_SLOT_BLINKLED;
237 err("set_attention_status - Error : invalid input [%x]\n",
242 pslot = to_slot(hotplug_slot);
243 rc = ibmphp_hpc_writeslot(pslot, cmd);
248 ibmphp_unlock_operations();
250 debug("set_attention_status - Exit rc[%d]\n", rc);
254 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
260 debug("get_attention_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
261 (ulong) hotplug_slot, (ulong) value);
263 ibmphp_lock_operations();
265 pslot = to_slot(hotplug_slot);
266 memcpy(&myslot, pslot, sizeof(struct slot));
267 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
270 rc = ibmphp_hpc_readslot(pslot, READ_EXTSLOTSTATUS,
273 *value = SLOT_ATTN(myslot.status, myslot.ext_status);
276 ibmphp_unlock_operations();
277 debug("get_attention_status - Exit rc[%d] value[%x]\n", rc, *value);
281 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
287 debug("get_latch_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
288 (ulong) hotplug_slot, (ulong) value);
289 ibmphp_lock_operations();
291 pslot = to_slot(hotplug_slot);
292 memcpy(&myslot, pslot, sizeof(struct slot));
293 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
296 *value = SLOT_LATCH(myslot.status);
299 ibmphp_unlock_operations();
300 debug("get_latch_status - Exit rc[%d] rc[%x] value[%x]\n",
306 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
312 debug("get_power_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
313 (ulong) hotplug_slot, (ulong) value);
314 ibmphp_lock_operations();
316 pslot = to_slot(hotplug_slot);
317 memcpy(&myslot, pslot, sizeof(struct slot));
318 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
321 *value = SLOT_PWRGD(myslot.status);
324 ibmphp_unlock_operations();
325 debug("get_power_status - Exit rc[%d] rc[%x] value[%x]\n",
330 static int get_adapter_present(struct hotplug_slot *hotplug_slot, u8 *value)
337 debug("get_adapter_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
338 (ulong) hotplug_slot, (ulong) value);
339 ibmphp_lock_operations();
341 pslot = to_slot(hotplug_slot);
342 memcpy(&myslot, pslot, sizeof(struct slot));
343 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
346 present = SLOT_PRESENT(myslot.status);
347 if (present == HPC_SLOT_EMPTY)
354 ibmphp_unlock_operations();
355 debug("get_adapter_present - Exit rc[%d] value[%x]\n", rc, *value);
359 static int get_max_bus_speed(struct slot *slot)
363 enum pci_bus_speed speed;
364 struct pci_bus *bus = slot->hotplug_slot.pci_slot->bus;
366 debug("%s - Entry slot[%p]\n", __func__, slot);
368 ibmphp_lock_operations();
369 mode = slot->supported_bus_mode;
370 speed = slot->supported_speed;
371 ibmphp_unlock_operations();
377 if (mode == BUS_MODE_PCIX)
385 /* Note (will need to change): there would be soon 256, 512 also */
390 bus->max_bus_speed = speed;
392 debug("%s - Exit rc[%d] speed[%x]\n", __func__, rc, speed);
396 /****************************************************************************
397 * This routine will initialize the ops data structure used in the validate
398 * function. It will also power off empty slots that are powered on since BIOS
399 * leaves those on, albeit disconnected
400 ****************************************************************************/
401 static int __init init_ops(void)
403 struct slot *slot_cur;
407 list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
408 debug("BEFORE GETTING SLOT STATUS, slot # %x\n",
410 if (slot_cur->ctrl->revision == 0xFF)
411 if (get_ctrl_revision(slot_cur,
412 &slot_cur->ctrl->revision))
415 if (slot_cur->bus_on->current_speed == 0xFF)
416 if (get_cur_bus_info(&slot_cur))
418 get_max_bus_speed(slot_cur);
420 if (slot_cur->ctrl->options == 0xFF)
421 if (get_hpc_options(slot_cur, &slot_cur->ctrl->options))
424 retval = slot_update(&slot_cur);
428 debug("status = %x\n", slot_cur->status);
429 debug("ext_status = %x\n", slot_cur->ext_status);
430 debug("SLOT_POWER = %x\n", SLOT_POWER(slot_cur->status));
431 debug("SLOT_PRESENT = %x\n", SLOT_PRESENT(slot_cur->status));
432 debug("SLOT_LATCH = %x\n", SLOT_LATCH(slot_cur->status));
434 if ((SLOT_PWRGD(slot_cur->status)) &&
435 !(SLOT_PRESENT(slot_cur->status)) &&
436 !(SLOT_LATCH(slot_cur->status))) {
437 debug("BEFORE POWER OFF COMMAND\n");
438 rc = power_off(slot_cur);
442 /* retval = slot_update(&slot_cur);
445 * ibmphp_update_slot_info(slot_cur);
453 /* This operation will check whether the slot is within the bounds and
454 * the operation is valid to perform on that slot
455 * Parameters: slot, operation
456 * Returns: 0 or error codes
458 static int validate(struct slot *slot_cur, int opn)
465 number = slot_cur->number;
466 if ((number > max_slots) || (number < 0))
468 debug("slot_number in validate is %d\n", slot_cur->number);
470 retval = slot_update(&slot_cur);
476 if (!(SLOT_PWRGD(slot_cur->status)) &&
477 (SLOT_PRESENT(slot_cur->status)) &&
478 !(SLOT_LATCH(slot_cur->status)))
482 if ((SLOT_PWRGD(slot_cur->status)) &&
483 (SLOT_PRESENT(slot_cur->status)) &&
484 !(SLOT_LATCH(slot_cur->status)))
490 err("validate failed....\n");
494 /****************************************************************************
495 * This routine is for updating the data structures in the hotplug core
496 * Parameters: struct slot
497 * Returns: 0 or error
498 ****************************************************************************/
499 int ibmphp_update_slot_info(struct slot *slot_cur)
501 struct pci_bus *bus = slot_cur->hotplug_slot.pci_slot->bus;
505 bus_speed = slot_cur->bus_on->current_speed;
506 mode = slot_cur->bus_on->current_bus_mode;
512 if (mode == BUS_MODE_PCIX)
514 else if (mode == BUS_MODE_PCI)
517 bus_speed = PCI_SPEED_UNKNOWN;
524 bus_speed = PCI_SPEED_UNKNOWN;
527 bus->cur_bus_speed = bus_speed;
534 /******************************************************************************
535 * This function will return the pci_func, given bus and devfunc, or NULL. It
536 * is called from visit routines
537 ******************************************************************************/
539 static struct pci_func *ibm_slot_find(u8 busno, u8 device, u8 function)
541 struct pci_func *func_cur;
542 struct slot *slot_cur;
543 list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
544 if (slot_cur->func) {
545 func_cur = slot_cur->func;
547 if ((func_cur->busno == busno) &&
548 (func_cur->device == device) &&
549 (func_cur->function == function))
551 func_cur = func_cur->next;
558 /*************************************************************
559 * This routine frees up memory used by struct slot, including
560 * the pointers to pci_func, bus, hotplug_slot, controller,
561 * and deregistering from the hotplug core
562 *************************************************************/
563 static void free_slots(void)
565 struct slot *slot_cur, *next;
567 debug("%s -- enter\n", __func__);
569 list_for_each_entry_safe(slot_cur, next, &ibmphp_slot_head,
571 pci_hp_del(&slot_cur->hotplug_slot);
572 slot_cur->ctrl = NULL;
573 slot_cur->bus_on = NULL;
576 * We don't want to actually remove the resources,
577 * since ibmphp_free_resources() will do just that.
579 ibmphp_unconfigure_card(&slot_cur, -1);
581 pci_hp_destroy(&slot_cur->hotplug_slot);
584 debug("%s -- exit\n", __func__);
587 static void ibm_unconfigure_device(struct pci_func *func)
589 struct pci_dev *temp;
592 debug("inside %s\n", __func__);
593 debug("func->device = %x, func->function = %x\n",
594 func->device, func->function);
595 debug("func->device << 3 | 0x0 = %x\n", func->device << 3 | 0x0);
597 pci_lock_rescan_remove();
599 for (j = 0; j < 0x08; j++) {
600 temp = pci_get_domain_bus_and_slot(0, func->busno,
601 (func->device << 3) | j);
603 pci_stop_and_remove_bus_device(temp);
608 pci_dev_put(func->dev);
610 pci_unlock_rescan_remove();
614 * The following function is to fix kernel bug regarding
615 * getting bus entries, here we manually add those primary
616 * bus entries to kernel bus structure whenever apply
618 static u8 bus_structure_fixup(u8 busno)
620 struct pci_bus *bus, *b;
624 if (pci_find_bus(0, busno) || !(ibmphp_find_same_bus_num(busno)))
627 bus = kmalloc(sizeof(*bus), GFP_KERNEL);
631 dev = kmalloc(sizeof(*dev), GFP_KERNEL);
638 bus->ops = ibmphp_pci_bus->ops;
640 for (dev->devfn = 0; dev->devfn < 256; dev->devfn += 8) {
641 if (!pci_read_config_word(dev, PCI_VENDOR_ID, &l) &&
642 (l != 0x0000) && (l != 0xffff)) {
643 debug("%s - Inside bus_structure_fixup()\n",
645 b = pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
649 pci_bus_add_devices(b);
660 static int ibm_configure_device(struct pci_func *func)
662 struct pci_bus *child;
664 int flag = 0; /* this is to make sure we don't double scan the bus,
665 for bridged devices primarily */
667 pci_lock_rescan_remove();
669 if (!(bus_structure_fixup(func->busno)))
671 if (func->dev == NULL)
672 func->dev = pci_get_domain_bus_and_slot(0, func->busno,
673 PCI_DEVFN(func->device, func->function));
675 if (func->dev == NULL) {
676 struct pci_bus *bus = pci_find_bus(0, func->busno);
680 num = pci_scan_slot(bus,
681 PCI_DEVFN(func->device, func->function));
683 pci_bus_add_devices(bus);
685 func->dev = pci_get_domain_bus_and_slot(0, func->busno,
686 PCI_DEVFN(func->device, func->function));
687 if (func->dev == NULL) {
688 err("ERROR... : pci_dev still NULL\n");
692 if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) {
693 pci_hp_add_bridge(func->dev);
694 child = func->dev->subordinate;
696 pci_bus_add_devices(child);
700 pci_unlock_rescan_remove();
704 /*******************************************************
705 * Returns whether the bus is empty or not
706 *******************************************************/
707 static int is_bus_empty(struct slot *slot_cur)
710 struct slot *tmp_slot;
711 u8 i = slot_cur->bus_on->slot_min;
713 while (i <= slot_cur->bus_on->slot_max) {
714 if (i == slot_cur->number) {
718 tmp_slot = ibmphp_get_slot_from_physical_num(i);
721 rc = slot_update(&tmp_slot);
724 if (SLOT_PRESENT(tmp_slot->status) &&
725 SLOT_PWRGD(tmp_slot->status))
732 /***********************************************************
733 * If the HPC permits and the bus currently empty, tries to set the
734 * bus speed and mode at the maximum card and bus capability
736 * Returns: bus is set (0) or error code
737 ***********************************************************/
738 static int set_bus(struct slot *slot_cur)
744 static const struct pci_device_id ciobx[] = {
745 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, 0x0101) },
749 debug("%s - entry slot # %d\n", __func__, slot_cur->number);
750 if (SET_BUS_STATUS(slot_cur->ctrl) && is_bus_empty(slot_cur)) {
751 rc = slot_update(&slot_cur);
754 speed = SLOT_SPEED(slot_cur->ext_status);
755 debug("ext_status = %x, speed = %x\n", slot_cur->ext_status, speed);
757 case HPC_SLOT_SPEED_33:
758 cmd = HPC_BUS_33CONVMODE;
760 case HPC_SLOT_SPEED_66:
761 if (SLOT_PCIX(slot_cur->ext_status)) {
762 if ((slot_cur->supported_speed >= BUS_SPEED_66) &&
763 (slot_cur->supported_bus_mode == BUS_MODE_PCIX))
764 cmd = HPC_BUS_66PCIXMODE;
765 else if (!SLOT_BUS_MODE(slot_cur->ext_status))
766 /* if max slot/bus capability is 66 pci
767 and there's no bus mode mismatch, then
768 the adapter supports 66 pci */
769 cmd = HPC_BUS_66CONVMODE;
771 cmd = HPC_BUS_33CONVMODE;
773 if (slot_cur->supported_speed >= BUS_SPEED_66)
774 cmd = HPC_BUS_66CONVMODE;
776 cmd = HPC_BUS_33CONVMODE;
779 case HPC_SLOT_SPEED_133:
780 switch (slot_cur->supported_speed) {
782 cmd = HPC_BUS_33CONVMODE;
785 if (slot_cur->supported_bus_mode == BUS_MODE_PCIX)
786 cmd = HPC_BUS_66PCIXMODE;
788 cmd = HPC_BUS_66CONVMODE;
791 cmd = HPC_BUS_100PCIXMODE;
794 /* This is to take care of the bug in CIOBX chip */
795 if (pci_dev_present(ciobx))
796 ibmphp_hpc_writeslot(slot_cur,
797 HPC_BUS_100PCIXMODE);
798 cmd = HPC_BUS_133PCIXMODE;
801 err("Wrong bus speed\n");
806 err("wrong slot speed\n");
809 debug("setting bus speed for slot %d, cmd %x\n",
810 slot_cur->number, cmd);
811 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
813 err("setting bus speed failed\n");
816 if (CTLR_RESULT(slot_cur->ctrl->status)) {
817 err("command not completed successfully in set_bus\n");
821 /* This is for x440, once Brandon fixes the firmware,
822 will not need this delay */
824 debug("%s -Exit\n", __func__);
828 /* This routine checks the bus limitations that the slot is on from the BIOS.
829 * This is used in deciding whether or not to power up the slot.
830 * (electrical/spec limitations. For example, >1 133 MHz or >2 66 PCI cards on
833 * Returns: 0 = no limitations, -EINVAL = exceeded limitations on the bus
835 static int check_limitations(struct slot *slot_cur)
838 struct slot *tmp_slot;
842 for (i = slot_cur->bus_on->slot_min; i <= slot_cur->bus_on->slot_max; i++) {
843 tmp_slot = ibmphp_get_slot_from_physical_num(i);
846 if ((SLOT_PWRGD(tmp_slot->status)) &&
847 !(SLOT_CONNECT(tmp_slot->status)))
850 get_cur_bus_info(&slot_cur);
851 switch (slot_cur->bus_on->current_speed) {
853 limitation = slot_cur->bus_on->slots_at_33_conv;
856 if (slot_cur->bus_on->current_bus_mode == BUS_MODE_PCIX)
857 limitation = slot_cur->bus_on->slots_at_66_pcix;
859 limitation = slot_cur->bus_on->slots_at_66_conv;
862 limitation = slot_cur->bus_on->slots_at_100_pcix;
865 limitation = slot_cur->bus_on->slots_at_133_pcix;
869 if ((count + 1) > limitation)
874 static inline void print_card_capability(struct slot *slot_cur)
876 info("capability of the card is ");
877 if ((slot_cur->ext_status & CARD_INFO) == PCIX133)
878 info(" 133 MHz PCI-X\n");
879 else if ((slot_cur->ext_status & CARD_INFO) == PCIX66)
880 info(" 66 MHz PCI-X\n");
881 else if ((slot_cur->ext_status & CARD_INFO) == PCI66)
882 info(" 66 MHz PCI\n");
884 info(" 33 MHz PCI\n");
888 /* This routine will power on the slot, configure the device(s) and find the
890 * Parameters: hotplug_slot
891 * Returns: 0 or failure codes
893 static int enable_slot(struct hotplug_slot *hs)
896 struct slot *slot_cur;
898 struct pci_func *tmp_func;
900 ibmphp_lock_operations();
902 debug("ENABLING SLOT........\n");
903 slot_cur = to_slot(hs);
905 rc = validate(slot_cur, ENABLE);
907 err("validate function failed\n");
911 attn_LED_blink(slot_cur);
913 rc = set_bus(slot_cur);
915 err("was not able to set the bus\n");
919 /*-----------------debugging------------------------------*/
920 get_cur_bus_info(&slot_cur);
921 debug("the current bus speed right after set_bus = %x\n",
922 slot_cur->bus_on->current_speed);
923 /*----------------------------------------------------------*/
925 rc = check_limitations(slot_cur);
927 err("Adding this card exceeds the limitations of this bus.\n");
928 err("(i.e., >1 133MHz cards running on same bus, or >2 66 PCI cards running on same bus.\n");
929 err("Try hot-adding into another bus\n");
934 rc = power_on(slot_cur);
937 err("something wrong when powering up... please see below for details\n");
938 /* need to turn off before on, otherwise, blinking overwrites */
941 if (slot_update(&slot_cur)) {
947 /* Check to see the error of why it failed */
948 if ((SLOT_POWER(slot_cur->status)) &&
949 !(SLOT_PWRGD(slot_cur->status)))
950 err("power fault occurred trying to power up\n");
951 else if (SLOT_BUS_SPEED(slot_cur->status)) {
952 err("bus speed mismatch occurred. please check current bus speed and card capability\n");
953 print_card_capability(slot_cur);
954 } else if (SLOT_BUS_MODE(slot_cur->ext_status)) {
955 err("bus mode mismatch occurred. please check current bus mode and card capability\n");
956 print_card_capability(slot_cur);
958 ibmphp_update_slot_info(slot_cur);
961 debug("after power_on\n");
962 /*-----------------------debugging---------------------------*/
963 get_cur_bus_info(&slot_cur);
964 debug("the current bus speed right after power_on = %x\n",
965 slot_cur->bus_on->current_speed);
966 /*----------------------------------------------------------*/
968 rc = slot_update(&slot_cur);
973 if (SLOT_POWER(slot_cur->status) && !(SLOT_PWRGD(slot_cur->status))) {
974 err("power fault occurred trying to power up...\n");
977 if (SLOT_POWER(slot_cur->status) && (SLOT_BUS_SPEED(slot_cur->status))) {
978 err("bus speed mismatch occurred. please check current bus speed and card capability\n");
979 print_card_capability(slot_cur);
982 /* Don't think this case will happen after above checks...
983 * but just in case, for paranoia sake */
984 if (!(SLOT_POWER(slot_cur->status))) {
985 err("power on failed...\n");
989 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
990 if (!slot_cur->func) {
991 /* do update_slot_info here? */
995 slot_cur->func->busno = slot_cur->bus;
996 slot_cur->func->device = slot_cur->device;
997 for (i = 0; i < 4; i++)
998 slot_cur->func->irq[i] = slot_cur->irq[i];
1000 debug("b4 configure_card, slot_cur->bus = %x, slot_cur->device = %x\n",
1001 slot_cur->bus, slot_cur->device);
1003 if (ibmphp_configure_card(slot_cur->func, slot_cur->number)) {
1004 err("configure_card was unsuccessful...\n");
1005 /* true because don't need to actually deallocate resources,
1006 * just remove references */
1007 ibmphp_unconfigure_card(&slot_cur, 1);
1008 debug("after unconfigure_card\n");
1009 slot_cur->func = NULL;
1016 tmp_func = ibm_slot_find(slot_cur->bus, slot_cur->func->device,
1018 if (tmp_func && !(tmp_func->dev))
1019 ibm_configure_device(tmp_func);
1023 if (slot_update(&slot_cur)) {
1027 ibmphp_print_test();
1028 rc = ibmphp_update_slot_info(slot_cur);
1030 ibmphp_unlock_operations();
1034 attn_off(slot_cur); /* need to turn off if was blinking b4 */
1037 rcpr = slot_update(&slot_cur);
1042 ibmphp_update_slot_info(slot_cur);
1046 attn_off(slot_cur); /* need to turn off if was blinking b4 */
1048 rcpr = power_off(slot_cur);
1056 /**************************************************************
1057 * HOT REMOVING ADAPTER CARD *
1058 * INPUT: POINTER TO THE HOTPLUG SLOT STRUCTURE *
1059 * OUTPUT: SUCCESS 0 ; FAILURE: UNCONFIGURE , VALIDATE *
1061 **************************************************************/
1062 static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot)
1064 struct slot *slot = to_slot(hotplug_slot);
1067 ibmphp_lock_operations();
1068 rc = ibmphp_do_disable_slot(slot);
1069 ibmphp_unlock_operations();
1073 int ibmphp_do_disable_slot(struct slot *slot_cur)
1078 debug("DISABLING SLOT...\n");
1080 if ((slot_cur == NULL) || (slot_cur->ctrl == NULL))
1083 flag = slot_cur->flag;
1087 rc = validate(slot_cur, DISABLE);
1088 /* checking if powered off already & valid slot # */
1092 attn_LED_blink(slot_cur);
1094 if (slot_cur->func == NULL) {
1095 /* We need this for functions that were there on bootup */
1096 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1097 if (!slot_cur->func) {
1101 slot_cur->func->busno = slot_cur->bus;
1102 slot_cur->func->device = slot_cur->device;
1105 ibm_unconfigure_device(slot_cur->func);
1108 * If we got here from latch suddenly opening on operating card or
1109 * a power fault, there's no power to the card, so cannot
1110 * read from it to determine what resources it occupied. This operation
1111 * is forbidden anyhow. The best we can do is remove it from kernel
1119 rc = ibmphp_unconfigure_card(&slot_cur, 0);
1120 slot_cur->func = NULL;
1121 debug("in disable_slot. after unconfigure_card\n");
1123 err("could not unconfigure card.\n");
1127 rc = ibmphp_hpc_writeslot(slot_cur, HPC_SLOT_OFF);
1132 rc = slot_update(&slot_cur);
1136 rc = ibmphp_update_slot_info(slot_cur);
1137 ibmphp_print_test();
1142 /* Need to turn off if was blinking b4 */
1145 if (slot_update(&slot_cur)) {
1150 ibmphp_update_slot_info(slot_cur);
1154 const struct hotplug_slot_ops ibmphp_hotplug_slot_ops = {
1155 .set_attention_status = set_attention_status,
1156 .enable_slot = enable_slot,
1157 .disable_slot = ibmphp_disable_slot,
1158 .hardware_test = NULL,
1159 .get_power_status = get_power_status,
1160 .get_attention_status = get_attention_status,
1161 .get_latch_status = get_latch_status,
1162 .get_adapter_status = get_adapter_present,
1165 static void ibmphp_unload(void)
1168 debug("after slots\n");
1169 ibmphp_free_resources();
1170 debug("after resources\n");
1171 ibmphp_free_bus_info_queue();
1172 debug("after bus info\n");
1173 ibmphp_free_ebda_hpc_queue();
1174 debug("after ebda hpc\n");
1175 ibmphp_free_ebda_pci_rsrc_queue();
1176 debug("after ebda pci rsrc\n");
1177 kfree(ibmphp_pci_bus);
1180 static int __init ibmphp_init(void)
1182 struct pci_bus *bus;
1188 info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
1190 ibmphp_pci_bus = kmalloc(sizeof(*ibmphp_pci_bus), GFP_KERNEL);
1191 if (!ibmphp_pci_bus) {
1196 bus = pci_find_bus(0, 0);
1198 err("Can't find the root pci bus, can not continue\n");
1202 memcpy(ibmphp_pci_bus, bus, sizeof(*ibmphp_pci_bus));
1204 ibmphp_debug = debug;
1206 for (i = 0; i < 16; i++)
1209 rc = ibmphp_access_ebda();
1212 debug("after ibmphp_access_ebda()\n");
1214 rc = ibmphp_rsrc_init();
1217 debug("AFTER Resource & EBDA INITIALIZATIONS\n");
1219 max_slots = get_max_slots();
1221 rc = ibmphp_register_pci();
1230 ibmphp_print_test();
1231 rc = ibmphp_hpc_start_poll_thread();
1243 static void __exit ibmphp_exit(void)
1245 ibmphp_hpc_stop_poll_thread();
1246 debug("after polling\n");
1251 module_init(ibmphp_init);
1252 module_exit(ibmphp_exit);