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 */
54 static int get_max_adapter_speed_1 (struct hotplug_slot *, u8 *, u8);
56 static inline int get_max_adapter_speed (struct hotplug_slot *hs, u8 *value)
58 return get_max_adapter_speed_1 (hs, value, 1);
61 static inline int get_cur_bus_info(struct slot **sl)
64 struct slot *slot_cur = *sl;
66 debug("options = %x\n", slot_cur->ctrl->options);
67 debug("revision = %x\n", slot_cur->ctrl->revision);
69 if (READ_BUS_STATUS(slot_cur->ctrl))
70 rc = ibmphp_hpc_readslot(slot_cur, READ_BUSSTATUS, NULL);
75 slot_cur->bus_on->current_speed = CURRENT_BUS_SPEED(slot_cur->busstatus);
76 if (READ_BUS_MODE(slot_cur->ctrl))
77 slot_cur->bus_on->current_bus_mode =
78 CURRENT_BUS_MODE(slot_cur->busstatus);
80 slot_cur->bus_on->current_bus_mode = 0xFF;
82 debug("busstatus = %x, bus_speed = %x, bus_mode = %x\n",
84 slot_cur->bus_on->current_speed,
85 slot_cur->bus_on->current_bus_mode);
91 static inline int slot_update(struct slot **sl)
94 rc = ibmphp_hpc_readslot(*sl, READ_ALLSTAT, NULL);
98 rc = get_cur_bus_info(sl);
102 static int __init get_max_slots(void)
104 struct slot *slot_cur;
107 list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
108 /* sometimes the hot-pluggable slots start with 4 (not always from 1) */
109 slot_count = max(slot_count, slot_cur->number);
114 /* This routine will put the correct slot->device information per slot. It's
115 * called from initialization of the slot structures. It will also assign
116 * interrupt numbers per each slot.
117 * Parameters: struct slot
118 * Returns 0 or errors
120 int ibmphp_init_devno(struct slot **cur_slot)
122 struct irq_routing_table *rtable;
127 rtable = pcibios_get_irq_routing_table();
129 err("no BIOS routing table...\n");
133 len = (rtable->size - sizeof(struct irq_routing_table)) /
134 sizeof(struct irq_info);
140 for (loop = 0; loop < len; loop++) {
141 if ((*cur_slot)->number == rtable->slots[loop].slot &&
142 (*cur_slot)->bus == rtable->slots[loop].bus) {
143 (*cur_slot)->device = PCI_SLOT(rtable->slots[loop].devfn);
144 for (i = 0; i < 4; i++)
145 (*cur_slot)->irq[i] = IO_APIC_get_PCI_irq_vector((int) (*cur_slot)->bus,
146 (int) (*cur_slot)->device, i);
148 debug("(*cur_slot)->irq[0] = %x\n",
149 (*cur_slot)->irq[0]);
150 debug("(*cur_slot)->irq[1] = %x\n",
151 (*cur_slot)->irq[1]);
152 debug("(*cur_slot)->irq[2] = %x\n",
153 (*cur_slot)->irq[2]);
154 debug("(*cur_slot)->irq[3] = %x\n",
155 (*cur_slot)->irq[3]);
157 debug("rtable->exclusive_irqs = %x\n",
158 rtable->exclusive_irqs);
159 debug("rtable->slots[loop].irq[0].bitmap = %x\n",
160 rtable->slots[loop].irq[0].bitmap);
161 debug("rtable->slots[loop].irq[1].bitmap = %x\n",
162 rtable->slots[loop].irq[1].bitmap);
163 debug("rtable->slots[loop].irq[2].bitmap = %x\n",
164 rtable->slots[loop].irq[2].bitmap);
165 debug("rtable->slots[loop].irq[3].bitmap = %x\n",
166 rtable->slots[loop].irq[3].bitmap);
168 debug("rtable->slots[loop].irq[0].link = %x\n",
169 rtable->slots[loop].irq[0].link);
170 debug("rtable->slots[loop].irq[1].link = %x\n",
171 rtable->slots[loop].irq[1].link);
172 debug("rtable->slots[loop].irq[2].link = %x\n",
173 rtable->slots[loop].irq[2].link);
174 debug("rtable->slots[loop].irq[3].link = %x\n",
175 rtable->slots[loop].irq[3].link);
176 debug("end of init_devno\n");
186 static inline int power_on(struct slot *slot_cur)
188 u8 cmd = HPC_SLOT_ON;
191 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
193 err("power on failed\n");
196 if (CTLR_RESULT(slot_cur->ctrl->status)) {
197 err("command not completed successfully in power_on\n");
200 msleep(3000); /* For ServeRAID cards, and some 66 PCI */
204 static inline int power_off(struct slot *slot_cur)
206 u8 cmd = HPC_SLOT_OFF;
209 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
211 err("power off failed\n");
214 if (CTLR_RESULT(slot_cur->ctrl->status)) {
215 err("command not completed successfully in power_off\n");
221 static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 value)
225 u8 cmd = 0x00; /* avoid compiler warning */
227 debug("set_attention_status - Entry hotplug_slot[%lx] value[%x]\n",
228 (ulong) hotplug_slot, value);
229 ibmphp_lock_operations();
234 case HPC_SLOT_ATTN_OFF:
235 cmd = HPC_SLOT_ATTNOFF;
237 case HPC_SLOT_ATTN_ON:
238 cmd = HPC_SLOT_ATTNON;
240 case HPC_SLOT_ATTN_BLINK:
241 cmd = HPC_SLOT_BLINKLED;
245 err("set_attention_status - Error : invalid input [%x]\n",
250 pslot = to_slot(hotplug_slot);
251 rc = ibmphp_hpc_writeslot(pslot, cmd);
256 ibmphp_unlock_operations();
258 debug("set_attention_status - Exit rc[%d]\n", rc);
262 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
268 debug("get_attention_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
269 (ulong) hotplug_slot, (ulong) value);
271 ibmphp_lock_operations();
273 pslot = to_slot(hotplug_slot);
274 memcpy(&myslot, pslot, sizeof(struct slot));
275 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
278 rc = ibmphp_hpc_readslot(pslot, READ_EXTSLOTSTATUS,
281 *value = SLOT_ATTN(myslot.status, myslot.ext_status);
284 ibmphp_unlock_operations();
285 debug("get_attention_status - Exit rc[%d] value[%x]\n", rc, *value);
289 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
295 debug("get_latch_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
296 (ulong) hotplug_slot, (ulong) value);
297 ibmphp_lock_operations();
299 pslot = to_slot(hotplug_slot);
300 memcpy(&myslot, pslot, sizeof(struct slot));
301 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
304 *value = SLOT_LATCH(myslot.status);
307 ibmphp_unlock_operations();
308 debug("get_latch_status - Exit rc[%d] rc[%x] value[%x]\n",
314 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
320 debug("get_power_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
321 (ulong) hotplug_slot, (ulong) value);
322 ibmphp_lock_operations();
324 pslot = to_slot(hotplug_slot);
325 memcpy(&myslot, pslot, sizeof(struct slot));
326 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
329 *value = SLOT_PWRGD(myslot.status);
332 ibmphp_unlock_operations();
333 debug("get_power_status - Exit rc[%d] rc[%x] value[%x]\n",
338 static int get_adapter_present(struct hotplug_slot *hotplug_slot, u8 *value)
345 debug("get_adapter_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
346 (ulong) hotplug_slot, (ulong) value);
347 ibmphp_lock_operations();
349 pslot = to_slot(hotplug_slot);
350 memcpy(&myslot, pslot, sizeof(struct slot));
351 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
354 present = SLOT_PRESENT(myslot.status);
355 if (present == HPC_SLOT_EMPTY)
362 ibmphp_unlock_operations();
363 debug("get_adapter_present - Exit rc[%d] value[%x]\n", rc, *value);
367 static int get_max_bus_speed(struct slot *slot)
371 enum pci_bus_speed speed;
372 struct pci_bus *bus = slot->hotplug_slot.pci_slot->bus;
374 debug("%s - Entry slot[%p]\n", __func__, slot);
376 ibmphp_lock_operations();
377 mode = slot->supported_bus_mode;
378 speed = slot->supported_speed;
379 ibmphp_unlock_operations();
385 if (mode == BUS_MODE_PCIX)
393 /* Note (will need to change): there would be soon 256, 512 also */
398 bus->max_bus_speed = speed;
400 debug("%s - Exit rc[%d] speed[%x]\n", __func__, rc, speed);
405 static int get_max_adapter_speed_1(struct hotplug_slot *hotplug_slot, u8 *value, u8 flag)
411 debug("get_max_adapter_speed_1 - Entry hotplug_slot[%lx] pvalue[%lx]\n",
412 (ulong)hotplug_slot, (ulong) value);
415 ibmphp_lock_operations();
417 if (hotplug_slot && value) {
418 pslot = hotplug_slot->private;
420 memcpy(&myslot, pslot, sizeof(struct slot));
421 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
424 if (!(SLOT_LATCH (myslot.status)) &&
425 (SLOT_PRESENT (myslot.status))) {
426 rc = ibmphp_hpc_readslot(pslot,
428 &(myslot.ext_status));
430 *value = SLOT_SPEED(myslot.ext_status);
432 *value = MAX_ADAPTER_NONE;
437 ibmphp_unlock_operations();
439 debug("get_max_adapter_speed_1 - Exit rc[%d] value[%x]\n", rc, *value);
443 static int get_bus_name(struct hotplug_slot *hotplug_slot, char *value)
446 struct slot *pslot = NULL;
448 debug("get_bus_name - Entry hotplug_slot[%lx]\n", (ulong)hotplug_slot);
450 ibmphp_lock_operations();
453 pslot = hotplug_slot->private;
456 snprintf(value, 100, "Bus %x", pslot->bus);
461 ibmphp_unlock_operations();
462 debug("get_bus_name - Exit rc[%d] value[%x]\n", rc, *value);
467 /****************************************************************************
468 * This routine will initialize the ops data structure used in the validate
469 * function. It will also power off empty slots that are powered on since BIOS
470 * leaves those on, albeit disconnected
471 ****************************************************************************/
472 static int __init init_ops(void)
474 struct slot *slot_cur;
478 list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
479 debug("BEFORE GETTING SLOT STATUS, slot # %x\n",
481 if (slot_cur->ctrl->revision == 0xFF)
482 if (get_ctrl_revision(slot_cur,
483 &slot_cur->ctrl->revision))
486 if (slot_cur->bus_on->current_speed == 0xFF)
487 if (get_cur_bus_info(&slot_cur))
489 get_max_bus_speed(slot_cur);
491 if (slot_cur->ctrl->options == 0xFF)
492 if (get_hpc_options(slot_cur, &slot_cur->ctrl->options))
495 retval = slot_update(&slot_cur);
499 debug("status = %x\n", slot_cur->status);
500 debug("ext_status = %x\n", slot_cur->ext_status);
501 debug("SLOT_POWER = %x\n", SLOT_POWER(slot_cur->status));
502 debug("SLOT_PRESENT = %x\n", SLOT_PRESENT(slot_cur->status));
503 debug("SLOT_LATCH = %x\n", SLOT_LATCH(slot_cur->status));
505 if ((SLOT_PWRGD(slot_cur->status)) &&
506 !(SLOT_PRESENT(slot_cur->status)) &&
507 !(SLOT_LATCH(slot_cur->status))) {
508 debug("BEFORE POWER OFF COMMAND\n");
509 rc = power_off(slot_cur);
513 /* retval = slot_update(&slot_cur);
516 * ibmphp_update_slot_info(slot_cur);
524 /* This operation will check whether the slot is within the bounds and
525 * the operation is valid to perform on that slot
526 * Parameters: slot, operation
527 * Returns: 0 or error codes
529 static int validate(struct slot *slot_cur, int opn)
536 number = slot_cur->number;
537 if ((number > max_slots) || (number < 0))
539 debug("slot_number in validate is %d\n", slot_cur->number);
541 retval = slot_update(&slot_cur);
547 if (!(SLOT_PWRGD(slot_cur->status)) &&
548 (SLOT_PRESENT(slot_cur->status)) &&
549 !(SLOT_LATCH(slot_cur->status)))
553 if ((SLOT_PWRGD(slot_cur->status)) &&
554 (SLOT_PRESENT(slot_cur->status)) &&
555 !(SLOT_LATCH(slot_cur->status)))
561 err("validate failed....\n");
565 /****************************************************************************
566 * This routine is for updating the data structures in the hotplug core
567 * Parameters: struct slot
568 * Returns: 0 or error
569 ****************************************************************************/
570 int ibmphp_update_slot_info(struct slot *slot_cur)
572 struct pci_bus *bus = slot_cur->hotplug_slot.pci_slot->bus;
576 bus_speed = slot_cur->bus_on->current_speed;
577 mode = slot_cur->bus_on->current_bus_mode;
583 if (mode == BUS_MODE_PCIX)
585 else if (mode == BUS_MODE_PCI)
588 bus_speed = PCI_SPEED_UNKNOWN;
595 bus_speed = PCI_SPEED_UNKNOWN;
598 bus->cur_bus_speed = bus_speed;
605 /******************************************************************************
606 * This function will return the pci_func, given bus and devfunc, or NULL. It
607 * is called from visit routines
608 ******************************************************************************/
610 static struct pci_func *ibm_slot_find(u8 busno, u8 device, u8 function)
612 struct pci_func *func_cur;
613 struct slot *slot_cur;
614 list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
615 if (slot_cur->func) {
616 func_cur = slot_cur->func;
618 if ((func_cur->busno == busno) &&
619 (func_cur->device == device) &&
620 (func_cur->function == function))
622 func_cur = func_cur->next;
629 /*************************************************************
630 * This routine frees up memory used by struct slot, including
631 * the pointers to pci_func, bus, hotplug_slot, controller,
632 * and deregistering from the hotplug core
633 *************************************************************/
634 static void free_slots(void)
636 struct slot *slot_cur, *next;
638 debug("%s -- enter\n", __func__);
640 list_for_each_entry_safe(slot_cur, next, &ibmphp_slot_head,
642 pci_hp_del(&slot_cur->hotplug_slot);
643 slot_cur->ctrl = NULL;
644 slot_cur->bus_on = NULL;
647 * We don't want to actually remove the resources,
648 * since ibmphp_free_resources() will do just that.
650 ibmphp_unconfigure_card(&slot_cur, -1);
652 pci_hp_destroy(&slot_cur->hotplug_slot);
655 debug("%s -- exit\n", __func__);
658 static void ibm_unconfigure_device(struct pci_func *func)
660 struct pci_dev *temp;
663 debug("inside %s\n", __func__);
664 debug("func->device = %x, func->function = %x\n",
665 func->device, func->function);
666 debug("func->device << 3 | 0x0 = %x\n", func->device << 3 | 0x0);
668 pci_lock_rescan_remove();
670 for (j = 0; j < 0x08; j++) {
671 temp = pci_get_domain_bus_and_slot(0, func->busno,
672 (func->device << 3) | j);
674 pci_stop_and_remove_bus_device(temp);
679 pci_dev_put(func->dev);
681 pci_unlock_rescan_remove();
685 * The following function is to fix kernel bug regarding
686 * getting bus entries, here we manually add those primary
687 * bus entries to kernel bus structure whenever apply
689 static u8 bus_structure_fixup(u8 busno)
691 struct pci_bus *bus, *b;
695 if (pci_find_bus(0, busno) || !(ibmphp_find_same_bus_num(busno)))
698 bus = kmalloc(sizeof(*bus), GFP_KERNEL);
702 dev = kmalloc(sizeof(*dev), GFP_KERNEL);
709 bus->ops = ibmphp_pci_bus->ops;
711 for (dev->devfn = 0; dev->devfn < 256; dev->devfn += 8) {
712 if (!pci_read_config_word(dev, PCI_VENDOR_ID, &l) &&
713 (l != 0x0000) && (l != 0xffff)) {
714 debug("%s - Inside bus_structure_fixup()\n",
716 b = pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
720 pci_bus_add_devices(b);
731 static int ibm_configure_device(struct pci_func *func)
733 struct pci_bus *child;
735 int flag = 0; /* this is to make sure we don't double scan the bus,
736 for bridged devices primarily */
738 pci_lock_rescan_remove();
740 if (!(bus_structure_fixup(func->busno)))
742 if (func->dev == NULL)
743 func->dev = pci_get_domain_bus_and_slot(0, func->busno,
744 PCI_DEVFN(func->device, func->function));
746 if (func->dev == NULL) {
747 struct pci_bus *bus = pci_find_bus(0, func->busno);
751 num = pci_scan_slot(bus,
752 PCI_DEVFN(func->device, func->function));
754 pci_bus_add_devices(bus);
756 func->dev = pci_get_domain_bus_and_slot(0, func->busno,
757 PCI_DEVFN(func->device, func->function));
758 if (func->dev == NULL) {
759 err("ERROR... : pci_dev still NULL\n");
763 if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) {
764 pci_hp_add_bridge(func->dev);
765 child = func->dev->subordinate;
767 pci_bus_add_devices(child);
771 pci_unlock_rescan_remove();
775 /*******************************************************
776 * Returns whether the bus is empty or not
777 *******************************************************/
778 static int is_bus_empty(struct slot *slot_cur)
781 struct slot *tmp_slot;
782 u8 i = slot_cur->bus_on->slot_min;
784 while (i <= slot_cur->bus_on->slot_max) {
785 if (i == slot_cur->number) {
789 tmp_slot = ibmphp_get_slot_from_physical_num(i);
792 rc = slot_update(&tmp_slot);
795 if (SLOT_PRESENT(tmp_slot->status) &&
796 SLOT_PWRGD(tmp_slot->status))
803 /***********************************************************
804 * If the HPC permits and the bus currently empty, tries to set the
805 * bus speed and mode at the maximum card and bus capability
807 * Returns: bus is set (0) or error code
808 ***********************************************************/
809 static int set_bus(struct slot *slot_cur)
815 static const struct pci_device_id ciobx[] = {
816 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, 0x0101) },
820 debug("%s - entry slot # %d\n", __func__, slot_cur->number);
821 if (SET_BUS_STATUS(slot_cur->ctrl) && is_bus_empty(slot_cur)) {
822 rc = slot_update(&slot_cur);
825 speed = SLOT_SPEED(slot_cur->ext_status);
826 debug("ext_status = %x, speed = %x\n", slot_cur->ext_status, speed);
828 case HPC_SLOT_SPEED_33:
829 cmd = HPC_BUS_33CONVMODE;
831 case HPC_SLOT_SPEED_66:
832 if (SLOT_PCIX(slot_cur->ext_status)) {
833 if ((slot_cur->supported_speed >= BUS_SPEED_66) &&
834 (slot_cur->supported_bus_mode == BUS_MODE_PCIX))
835 cmd = HPC_BUS_66PCIXMODE;
836 else if (!SLOT_BUS_MODE(slot_cur->ext_status))
837 /* if max slot/bus capability is 66 pci
838 and there's no bus mode mismatch, then
839 the adapter supports 66 pci */
840 cmd = HPC_BUS_66CONVMODE;
842 cmd = HPC_BUS_33CONVMODE;
844 if (slot_cur->supported_speed >= BUS_SPEED_66)
845 cmd = HPC_BUS_66CONVMODE;
847 cmd = HPC_BUS_33CONVMODE;
850 case HPC_SLOT_SPEED_133:
851 switch (slot_cur->supported_speed) {
853 cmd = HPC_BUS_33CONVMODE;
856 if (slot_cur->supported_bus_mode == BUS_MODE_PCIX)
857 cmd = HPC_BUS_66PCIXMODE;
859 cmd = HPC_BUS_66CONVMODE;
862 cmd = HPC_BUS_100PCIXMODE;
865 /* This is to take care of the bug in CIOBX chip */
866 if (pci_dev_present(ciobx))
867 ibmphp_hpc_writeslot(slot_cur,
868 HPC_BUS_100PCIXMODE);
869 cmd = HPC_BUS_133PCIXMODE;
872 err("Wrong bus speed\n");
877 err("wrong slot speed\n");
880 debug("setting bus speed for slot %d, cmd %x\n",
881 slot_cur->number, cmd);
882 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
884 err("setting bus speed failed\n");
887 if (CTLR_RESULT(slot_cur->ctrl->status)) {
888 err("command not completed successfully in set_bus\n");
892 /* This is for x440, once Brandon fixes the firmware,
893 will not need this delay */
895 debug("%s -Exit\n", __func__);
899 /* This routine checks the bus limitations that the slot is on from the BIOS.
900 * This is used in deciding whether or not to power up the slot.
901 * (electrical/spec limitations. For example, >1 133 MHz or >2 66 PCI cards on
904 * Returns: 0 = no limitations, -EINVAL = exceeded limitations on the bus
906 static int check_limitations(struct slot *slot_cur)
909 struct slot *tmp_slot;
913 for (i = slot_cur->bus_on->slot_min; i <= slot_cur->bus_on->slot_max; i++) {
914 tmp_slot = ibmphp_get_slot_from_physical_num(i);
917 if ((SLOT_PWRGD(tmp_slot->status)) &&
918 !(SLOT_CONNECT(tmp_slot->status)))
921 get_cur_bus_info(&slot_cur);
922 switch (slot_cur->bus_on->current_speed) {
924 limitation = slot_cur->bus_on->slots_at_33_conv;
927 if (slot_cur->bus_on->current_bus_mode == BUS_MODE_PCIX)
928 limitation = slot_cur->bus_on->slots_at_66_pcix;
930 limitation = slot_cur->bus_on->slots_at_66_conv;
933 limitation = slot_cur->bus_on->slots_at_100_pcix;
936 limitation = slot_cur->bus_on->slots_at_133_pcix;
940 if ((count + 1) > limitation)
945 static inline void print_card_capability(struct slot *slot_cur)
947 info("capability of the card is ");
948 if ((slot_cur->ext_status & CARD_INFO) == PCIX133)
949 info(" 133 MHz PCI-X\n");
950 else if ((slot_cur->ext_status & CARD_INFO) == PCIX66)
951 info(" 66 MHz PCI-X\n");
952 else if ((slot_cur->ext_status & CARD_INFO) == PCI66)
953 info(" 66 MHz PCI\n");
955 info(" 33 MHz PCI\n");
959 /* This routine will power on the slot, configure the device(s) and find the
961 * Parameters: hotplug_slot
962 * Returns: 0 or failure codes
964 static int enable_slot(struct hotplug_slot *hs)
967 struct slot *slot_cur;
969 struct pci_func *tmp_func;
971 ibmphp_lock_operations();
973 debug("ENABLING SLOT........\n");
974 slot_cur = to_slot(hs);
976 rc = validate(slot_cur, ENABLE);
978 err("validate function failed\n");
982 attn_LED_blink(slot_cur);
984 rc = set_bus(slot_cur);
986 err("was not able to set the bus\n");
990 /*-----------------debugging------------------------------*/
991 get_cur_bus_info(&slot_cur);
992 debug("the current bus speed right after set_bus = %x\n",
993 slot_cur->bus_on->current_speed);
994 /*----------------------------------------------------------*/
996 rc = check_limitations(slot_cur);
998 err("Adding this card exceeds the limitations of this bus.\n");
999 err("(i.e., >1 133MHz cards running on same bus, or >2 66 PCI cards running on same bus.\n");
1000 err("Try hot-adding into another bus\n");
1005 rc = power_on(slot_cur);
1008 err("something wrong when powering up... please see below for details\n");
1009 /* need to turn off before on, otherwise, blinking overwrites */
1012 if (slot_update(&slot_cur)) {
1018 /* Check to see the error of why it failed */
1019 if ((SLOT_POWER(slot_cur->status)) &&
1020 !(SLOT_PWRGD(slot_cur->status)))
1021 err("power fault occurred trying to power up\n");
1022 else if (SLOT_BUS_SPEED(slot_cur->status)) {
1023 err("bus speed mismatch occurred. please check current bus speed and card capability\n");
1024 print_card_capability(slot_cur);
1025 } else if (SLOT_BUS_MODE(slot_cur->ext_status)) {
1026 err("bus mode mismatch occurred. please check current bus mode and card capability\n");
1027 print_card_capability(slot_cur);
1029 ibmphp_update_slot_info(slot_cur);
1032 debug("after power_on\n");
1033 /*-----------------------debugging---------------------------*/
1034 get_cur_bus_info(&slot_cur);
1035 debug("the current bus speed right after power_on = %x\n",
1036 slot_cur->bus_on->current_speed);
1037 /*----------------------------------------------------------*/
1039 rc = slot_update(&slot_cur);
1044 if (SLOT_POWER(slot_cur->status) && !(SLOT_PWRGD(slot_cur->status))) {
1045 err("power fault occurred trying to power up...\n");
1048 if (SLOT_POWER(slot_cur->status) && (SLOT_BUS_SPEED(slot_cur->status))) {
1049 err("bus speed mismatch occurred. please check current bus speed and card capability\n");
1050 print_card_capability(slot_cur);
1053 /* Don't think this case will happen after above checks...
1054 * but just in case, for paranoia sake */
1055 if (!(SLOT_POWER(slot_cur->status))) {
1056 err("power on failed...\n");
1060 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1061 if (!slot_cur->func) {
1062 /* do update_slot_info here? */
1066 slot_cur->func->busno = slot_cur->bus;
1067 slot_cur->func->device = slot_cur->device;
1068 for (i = 0; i < 4; i++)
1069 slot_cur->func->irq[i] = slot_cur->irq[i];
1071 debug("b4 configure_card, slot_cur->bus = %x, slot_cur->device = %x\n",
1072 slot_cur->bus, slot_cur->device);
1074 if (ibmphp_configure_card(slot_cur->func, slot_cur->number)) {
1075 err("configure_card was unsuccessful...\n");
1076 /* true because don't need to actually deallocate resources,
1077 * just remove references */
1078 ibmphp_unconfigure_card(&slot_cur, 1);
1079 debug("after unconfigure_card\n");
1080 slot_cur->func = NULL;
1087 tmp_func = ibm_slot_find(slot_cur->bus, slot_cur->func->device,
1089 if (tmp_func && !(tmp_func->dev))
1090 ibm_configure_device(tmp_func);
1094 if (slot_update(&slot_cur)) {
1098 ibmphp_print_test();
1099 rc = ibmphp_update_slot_info(slot_cur);
1101 ibmphp_unlock_operations();
1105 attn_off(slot_cur); /* need to turn off if was blinking b4 */
1108 rcpr = slot_update(&slot_cur);
1113 ibmphp_update_slot_info(slot_cur);
1117 attn_off(slot_cur); /* need to turn off if was blinking b4 */
1119 rcpr = power_off(slot_cur);
1127 /**************************************************************
1128 * HOT REMOVING ADAPTER CARD *
1129 * INPUT: POINTER TO THE HOTPLUG SLOT STRUCTURE *
1130 * OUTPUT: SUCCESS 0 ; FAILURE: UNCONFIGURE , VALIDATE *
1132 **************************************************************/
1133 static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot)
1135 struct slot *slot = to_slot(hotplug_slot);
1138 ibmphp_lock_operations();
1139 rc = ibmphp_do_disable_slot(slot);
1140 ibmphp_unlock_operations();
1144 int ibmphp_do_disable_slot(struct slot *slot_cur)
1149 debug("DISABLING SLOT...\n");
1151 if ((slot_cur == NULL) || (slot_cur->ctrl == NULL))
1154 flag = slot_cur->flag;
1158 rc = validate(slot_cur, DISABLE);
1159 /* checking if powered off already & valid slot # */
1163 attn_LED_blink(slot_cur);
1165 if (slot_cur->func == NULL) {
1166 /* We need this for functions that were there on bootup */
1167 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1168 if (!slot_cur->func) {
1172 slot_cur->func->busno = slot_cur->bus;
1173 slot_cur->func->device = slot_cur->device;
1176 ibm_unconfigure_device(slot_cur->func);
1179 * If we got here from latch suddenly opening on operating card or
1180 * a power fault, there's no power to the card, so cannot
1181 * read from it to determine what resources it occupied. This operation
1182 * is forbidden anyhow. The best we can do is remove it from kernel
1190 rc = ibmphp_unconfigure_card(&slot_cur, 0);
1191 slot_cur->func = NULL;
1192 debug("in disable_slot. after unconfigure_card\n");
1194 err("could not unconfigure card.\n");
1198 rc = ibmphp_hpc_writeslot(slot_cur, HPC_SLOT_OFF);
1203 rc = slot_update(&slot_cur);
1207 rc = ibmphp_update_slot_info(slot_cur);
1208 ibmphp_print_test();
1213 /* Need to turn off if was blinking b4 */
1216 if (slot_update(&slot_cur)) {
1221 ibmphp_update_slot_info(slot_cur);
1225 const struct hotplug_slot_ops ibmphp_hotplug_slot_ops = {
1226 .set_attention_status = set_attention_status,
1227 .enable_slot = enable_slot,
1228 .disable_slot = ibmphp_disable_slot,
1229 .hardware_test = NULL,
1230 .get_power_status = get_power_status,
1231 .get_attention_status = get_attention_status,
1232 .get_latch_status = get_latch_status,
1233 .get_adapter_status = get_adapter_present,
1234 /* .get_max_adapter_speed = get_max_adapter_speed,
1235 .get_bus_name_status = get_bus_name,
1239 static void ibmphp_unload(void)
1242 debug("after slots\n");
1243 ibmphp_free_resources();
1244 debug("after resources\n");
1245 ibmphp_free_bus_info_queue();
1246 debug("after bus info\n");
1247 ibmphp_free_ebda_hpc_queue();
1248 debug("after ebda hpc\n");
1249 ibmphp_free_ebda_pci_rsrc_queue();
1250 debug("after ebda pci rsrc\n");
1251 kfree(ibmphp_pci_bus);
1254 static int __init ibmphp_init(void)
1256 struct pci_bus *bus;
1262 info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
1264 ibmphp_pci_bus = kmalloc(sizeof(*ibmphp_pci_bus), GFP_KERNEL);
1265 if (!ibmphp_pci_bus) {
1270 bus = pci_find_bus(0, 0);
1272 err("Can't find the root pci bus, can not continue\n");
1276 memcpy(ibmphp_pci_bus, bus, sizeof(*ibmphp_pci_bus));
1278 ibmphp_debug = debug;
1280 ibmphp_hpc_initvars();
1282 for (i = 0; i < 16; i++)
1285 rc = ibmphp_access_ebda();
1288 debug("after ibmphp_access_ebda()\n");
1290 rc = ibmphp_rsrc_init();
1293 debug("AFTER Resource & EBDA INITIALIZATIONS\n");
1295 max_slots = get_max_slots();
1297 rc = ibmphp_register_pci();
1306 ibmphp_print_test();
1307 rc = ibmphp_hpc_start_poll_thread();
1319 static void __exit ibmphp_exit(void)
1321 ibmphp_hpc_stop_poll_thread();
1322 debug("after polling\n");
1327 module_init(ibmphp_init);
1328 module_exit(ibmphp_exit);