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
7 * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
8 * Copyright (C) 2001-2003 IBM Corp.
10 * All rights reserved.
12 * Send feedback to <gregkh@us.ibm.com>
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 = hotplug_slot->private;
252 rc = ibmphp_hpc_writeslot(pslot, cmd);
259 ibmphp_unlock_operations();
261 debug("set_attention_status - Exit rc[%d]\n", rc);
265 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
271 debug("get_attention_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
272 (ulong) hotplug_slot, (ulong) value);
274 ibmphp_lock_operations();
276 pslot = hotplug_slot->private;
278 memcpy(&myslot, pslot, sizeof(struct slot));
279 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
282 rc = ibmphp_hpc_readslot(pslot,
284 &(myslot.ext_status));
286 *value = SLOT_ATTN(myslot.status,
291 ibmphp_unlock_operations();
292 debug("get_attention_status - Exit rc[%d] value[%x]\n", rc, *value);
296 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
302 debug("get_latch_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
303 (ulong) hotplug_slot, (ulong) value);
304 ibmphp_lock_operations();
306 pslot = hotplug_slot->private;
308 memcpy(&myslot, pslot, sizeof(struct slot));
309 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
312 *value = SLOT_LATCH(myslot.status);
316 ibmphp_unlock_operations();
317 debug("get_latch_status - Exit rc[%d] rc[%x] value[%x]\n",
323 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
329 debug("get_power_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
330 (ulong) hotplug_slot, (ulong) value);
331 ibmphp_lock_operations();
333 pslot = hotplug_slot->private;
335 memcpy(&myslot, pslot, sizeof(struct slot));
336 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
339 *value = SLOT_PWRGD(myslot.status);
343 ibmphp_unlock_operations();
344 debug("get_power_status - Exit rc[%d] rc[%x] value[%x]\n",
349 static int get_adapter_present(struct hotplug_slot *hotplug_slot, u8 *value)
356 debug("get_adapter_status - Entry hotplug_slot[%lx] pvalue[%lx]\n",
357 (ulong) hotplug_slot, (ulong) value);
358 ibmphp_lock_operations();
360 pslot = hotplug_slot->private;
362 memcpy(&myslot, pslot, sizeof(struct slot));
363 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
366 present = SLOT_PRESENT(myslot.status);
367 if (present == HPC_SLOT_EMPTY)
375 ibmphp_unlock_operations();
376 debug("get_adapter_present - Exit rc[%d] value[%x]\n", rc, *value);
380 static int get_max_bus_speed(struct slot *slot)
384 enum pci_bus_speed speed;
385 struct pci_bus *bus = slot->hotplug_slot->pci_slot->bus;
387 debug("%s - Entry slot[%p]\n", __func__, slot);
389 ibmphp_lock_operations();
390 mode = slot->supported_bus_mode;
391 speed = slot->supported_speed;
392 ibmphp_unlock_operations();
398 if (mode == BUS_MODE_PCIX)
406 /* Note (will need to change): there would be soon 256, 512 also */
411 bus->max_bus_speed = speed;
413 debug("%s - Exit rc[%d] speed[%x]\n", __func__, rc, speed);
418 static int get_max_adapter_speed_1(struct hotplug_slot *hotplug_slot, u8 *value, u8 flag)
424 debug("get_max_adapter_speed_1 - Entry hotplug_slot[%lx] pvalue[%lx]\n",
425 (ulong)hotplug_slot, (ulong) value);
428 ibmphp_lock_operations();
430 if (hotplug_slot && value) {
431 pslot = hotplug_slot->private;
433 memcpy(&myslot, pslot, sizeof(struct slot));
434 rc = ibmphp_hpc_readslot(pslot, READ_SLOTSTATUS,
437 if (!(SLOT_LATCH (myslot.status)) &&
438 (SLOT_PRESENT (myslot.status))) {
439 rc = ibmphp_hpc_readslot(pslot,
441 &(myslot.ext_status));
443 *value = SLOT_SPEED(myslot.ext_status);
445 *value = MAX_ADAPTER_NONE;
450 ibmphp_unlock_operations();
452 debug("get_max_adapter_speed_1 - Exit rc[%d] value[%x]\n", rc, *value);
456 static int get_bus_name(struct hotplug_slot *hotplug_slot, char *value)
459 struct slot *pslot = NULL;
461 debug("get_bus_name - Entry hotplug_slot[%lx]\n", (ulong)hotplug_slot);
463 ibmphp_lock_operations();
466 pslot = hotplug_slot->private;
469 snprintf(value, 100, "Bus %x", pslot->bus);
474 ibmphp_unlock_operations();
475 debug("get_bus_name - Exit rc[%d] value[%x]\n", rc, *value);
480 /****************************************************************************
481 * This routine will initialize the ops data structure used in the validate
482 * function. It will also power off empty slots that are powered on since BIOS
483 * leaves those on, albeit disconnected
484 ****************************************************************************/
485 static int __init init_ops(void)
487 struct slot *slot_cur;
491 list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
492 debug("BEFORE GETTING SLOT STATUS, slot # %x\n",
494 if (slot_cur->ctrl->revision == 0xFF)
495 if (get_ctrl_revision(slot_cur,
496 &slot_cur->ctrl->revision))
499 if (slot_cur->bus_on->current_speed == 0xFF)
500 if (get_cur_bus_info(&slot_cur))
502 get_max_bus_speed(slot_cur);
504 if (slot_cur->ctrl->options == 0xFF)
505 if (get_hpc_options(slot_cur, &slot_cur->ctrl->options))
508 retval = slot_update(&slot_cur);
512 debug("status = %x\n", slot_cur->status);
513 debug("ext_status = %x\n", slot_cur->ext_status);
514 debug("SLOT_POWER = %x\n", SLOT_POWER(slot_cur->status));
515 debug("SLOT_PRESENT = %x\n", SLOT_PRESENT(slot_cur->status));
516 debug("SLOT_LATCH = %x\n", SLOT_LATCH(slot_cur->status));
518 if ((SLOT_PWRGD(slot_cur->status)) &&
519 !(SLOT_PRESENT(slot_cur->status)) &&
520 !(SLOT_LATCH(slot_cur->status))) {
521 debug("BEFORE POWER OFF COMMAND\n");
522 rc = power_off(slot_cur);
526 /* retval = slot_update(&slot_cur);
529 * ibmphp_update_slot_info(slot_cur);
537 /* This operation will check whether the slot is within the bounds and
538 * the operation is valid to perform on that slot
539 * Parameters: slot, operation
540 * Returns: 0 or error codes
542 static int validate(struct slot *slot_cur, int opn)
549 number = slot_cur->number;
550 if ((number > max_slots) || (number < 0))
552 debug("slot_number in validate is %d\n", slot_cur->number);
554 retval = slot_update(&slot_cur);
560 if (!(SLOT_PWRGD(slot_cur->status)) &&
561 (SLOT_PRESENT(slot_cur->status)) &&
562 !(SLOT_LATCH(slot_cur->status)))
566 if ((SLOT_PWRGD(slot_cur->status)) &&
567 (SLOT_PRESENT(slot_cur->status)) &&
568 !(SLOT_LATCH(slot_cur->status)))
574 err("validate failed....\n");
578 /****************************************************************************
579 * This routine is for updating the data structures in the hotplug core
580 * Parameters: struct slot
581 * Returns: 0 or error
582 ****************************************************************************/
583 int ibmphp_update_slot_info(struct slot *slot_cur)
585 struct hotplug_slot_info *info;
586 struct pci_bus *bus = slot_cur->hotplug_slot->pci_slot->bus;
591 info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
595 info->power_status = SLOT_PWRGD(slot_cur->status);
596 info->attention_status = SLOT_ATTN(slot_cur->status,
597 slot_cur->ext_status);
598 info->latch_status = SLOT_LATCH(slot_cur->status);
599 if (!SLOT_PRESENT(slot_cur->status)) {
600 info->adapter_status = 0;
601 /* info->max_adapter_speed_status = MAX_ADAPTER_NONE; */
603 info->adapter_status = 1;
604 /* get_max_adapter_speed_1(slot_cur->hotplug_slot,
605 &info->max_adapter_speed_status, 0); */
608 bus_speed = slot_cur->bus_on->current_speed;
609 mode = slot_cur->bus_on->current_bus_mode;
615 if (mode == BUS_MODE_PCIX)
617 else if (mode == BUS_MODE_PCI)
620 bus_speed = PCI_SPEED_UNKNOWN;
627 bus_speed = PCI_SPEED_UNKNOWN;
630 bus->cur_bus_speed = bus_speed;
633 rc = pci_hp_change_slot_info(slot_cur->hotplug_slot, info);
639 /******************************************************************************
640 * This function will return the pci_func, given bus and devfunc, or NULL. It
641 * is called from visit routines
642 ******************************************************************************/
644 static struct pci_func *ibm_slot_find(u8 busno, u8 device, u8 function)
646 struct pci_func *func_cur;
647 struct slot *slot_cur;
648 list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
649 if (slot_cur->func) {
650 func_cur = slot_cur->func;
652 if ((func_cur->busno == busno) &&
653 (func_cur->device == device) &&
654 (func_cur->function == function))
656 func_cur = func_cur->next;
663 /*************************************************************
664 * This routine frees up memory used by struct slot, including
665 * the pointers to pci_func, bus, hotplug_slot, controller,
666 * and deregistering from the hotplug core
667 *************************************************************/
668 static void free_slots(void)
670 struct slot *slot_cur, *next;
672 debug("%s -- enter\n", __func__);
674 list_for_each_entry_safe(slot_cur, next, &ibmphp_slot_head,
676 pci_hp_del(slot_cur->hotplug_slot);
677 slot_cur->ctrl = NULL;
678 slot_cur->bus_on = NULL;
681 * We don't want to actually remove the resources,
682 * since ibmphp_free_resources() will do just that.
684 ibmphp_unconfigure_card(&slot_cur, -1);
686 pci_hp_destroy(slot_cur->hotplug_slot);
687 kfree(slot_cur->hotplug_slot->info);
688 kfree(slot_cur->hotplug_slot);
691 debug("%s -- exit\n", __func__);
694 static void ibm_unconfigure_device(struct pci_func *func)
696 struct pci_dev *temp;
699 debug("inside %s\n", __func__);
700 debug("func->device = %x, func->function = %x\n",
701 func->device, func->function);
702 debug("func->device << 3 | 0x0 = %x\n", func->device << 3 | 0x0);
704 pci_lock_rescan_remove();
706 for (j = 0; j < 0x08; j++) {
707 temp = pci_get_domain_bus_and_slot(0, func->busno,
708 (func->device << 3) | j);
710 pci_stop_and_remove_bus_device(temp);
715 pci_dev_put(func->dev);
717 pci_unlock_rescan_remove();
721 * The following function is to fix kernel bug regarding
722 * getting bus entries, here we manually add those primary
723 * bus entries to kernel bus structure whenever apply
725 static u8 bus_structure_fixup(u8 busno)
727 struct pci_bus *bus, *b;
731 if (pci_find_bus(0, busno) || !(ibmphp_find_same_bus_num(busno)))
734 bus = kmalloc(sizeof(*bus), GFP_KERNEL);
738 dev = kmalloc(sizeof(*dev), GFP_KERNEL);
745 bus->ops = ibmphp_pci_bus->ops;
747 for (dev->devfn = 0; dev->devfn < 256; dev->devfn += 8) {
748 if (!pci_read_config_word(dev, PCI_VENDOR_ID, &l) &&
749 (l != 0x0000) && (l != 0xffff)) {
750 debug("%s - Inside bus_structure_fixup()\n",
752 b = pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
756 pci_bus_add_devices(b);
767 static int ibm_configure_device(struct pci_func *func)
769 struct pci_bus *child;
771 int flag = 0; /* this is to make sure we don't double scan the bus,
772 for bridged devices primarily */
774 pci_lock_rescan_remove();
776 if (!(bus_structure_fixup(func->busno)))
778 if (func->dev == NULL)
779 func->dev = pci_get_domain_bus_and_slot(0, func->busno,
780 PCI_DEVFN(func->device, func->function));
782 if (func->dev == NULL) {
783 struct pci_bus *bus = pci_find_bus(0, func->busno);
787 num = pci_scan_slot(bus,
788 PCI_DEVFN(func->device, func->function));
790 pci_bus_add_devices(bus);
792 func->dev = pci_get_domain_bus_and_slot(0, func->busno,
793 PCI_DEVFN(func->device, func->function));
794 if (func->dev == NULL) {
795 err("ERROR... : pci_dev still NULL\n");
799 if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) {
800 pci_hp_add_bridge(func->dev);
801 child = func->dev->subordinate;
803 pci_bus_add_devices(child);
807 pci_unlock_rescan_remove();
811 /*******************************************************
812 * Returns whether the bus is empty or not
813 *******************************************************/
814 static int is_bus_empty(struct slot *slot_cur)
817 struct slot *tmp_slot;
818 u8 i = slot_cur->bus_on->slot_min;
820 while (i <= slot_cur->bus_on->slot_max) {
821 if (i == slot_cur->number) {
825 tmp_slot = ibmphp_get_slot_from_physical_num(i);
828 rc = slot_update(&tmp_slot);
831 if (SLOT_PRESENT(tmp_slot->status) &&
832 SLOT_PWRGD(tmp_slot->status))
839 /***********************************************************
840 * If the HPC permits and the bus currently empty, tries to set the
841 * bus speed and mode at the maximum card and bus capability
843 * Returns: bus is set (0) or error code
844 ***********************************************************/
845 static int set_bus(struct slot *slot_cur)
851 static const struct pci_device_id ciobx[] = {
852 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, 0x0101) },
856 debug("%s - entry slot # %d\n", __func__, slot_cur->number);
857 if (SET_BUS_STATUS(slot_cur->ctrl) && is_bus_empty(slot_cur)) {
858 rc = slot_update(&slot_cur);
861 speed = SLOT_SPEED(slot_cur->ext_status);
862 debug("ext_status = %x, speed = %x\n", slot_cur->ext_status, speed);
864 case HPC_SLOT_SPEED_33:
865 cmd = HPC_BUS_33CONVMODE;
867 case HPC_SLOT_SPEED_66:
868 if (SLOT_PCIX(slot_cur->ext_status)) {
869 if ((slot_cur->supported_speed >= BUS_SPEED_66) &&
870 (slot_cur->supported_bus_mode == BUS_MODE_PCIX))
871 cmd = HPC_BUS_66PCIXMODE;
872 else if (!SLOT_BUS_MODE(slot_cur->ext_status))
873 /* if max slot/bus capability is 66 pci
874 and there's no bus mode mismatch, then
875 the adapter supports 66 pci */
876 cmd = HPC_BUS_66CONVMODE;
878 cmd = HPC_BUS_33CONVMODE;
880 if (slot_cur->supported_speed >= BUS_SPEED_66)
881 cmd = HPC_BUS_66CONVMODE;
883 cmd = HPC_BUS_33CONVMODE;
886 case HPC_SLOT_SPEED_133:
887 switch (slot_cur->supported_speed) {
889 cmd = HPC_BUS_33CONVMODE;
892 if (slot_cur->supported_bus_mode == BUS_MODE_PCIX)
893 cmd = HPC_BUS_66PCIXMODE;
895 cmd = HPC_BUS_66CONVMODE;
898 cmd = HPC_BUS_100PCIXMODE;
901 /* This is to take care of the bug in CIOBX chip */
902 if (pci_dev_present(ciobx))
903 ibmphp_hpc_writeslot(slot_cur,
904 HPC_BUS_100PCIXMODE);
905 cmd = HPC_BUS_133PCIXMODE;
908 err("Wrong bus speed\n");
913 err("wrong slot speed\n");
916 debug("setting bus speed for slot %d, cmd %x\n",
917 slot_cur->number, cmd);
918 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
920 err("setting bus speed failed\n");
923 if (CTLR_RESULT(slot_cur->ctrl->status)) {
924 err("command not completed successfully in set_bus\n");
928 /* This is for x440, once Brandon fixes the firmware,
929 will not need this delay */
931 debug("%s -Exit\n", __func__);
935 /* This routine checks the bus limitations that the slot is on from the BIOS.
936 * This is used in deciding whether or not to power up the slot.
937 * (electrical/spec limitations. For example, >1 133 MHz or >2 66 PCI cards on
940 * Returns: 0 = no limitations, -EINVAL = exceeded limitations on the bus
942 static int check_limitations(struct slot *slot_cur)
945 struct slot *tmp_slot;
949 for (i = slot_cur->bus_on->slot_min; i <= slot_cur->bus_on->slot_max; i++) {
950 tmp_slot = ibmphp_get_slot_from_physical_num(i);
953 if ((SLOT_PWRGD(tmp_slot->status)) &&
954 !(SLOT_CONNECT(tmp_slot->status)))
957 get_cur_bus_info(&slot_cur);
958 switch (slot_cur->bus_on->current_speed) {
960 limitation = slot_cur->bus_on->slots_at_33_conv;
963 if (slot_cur->bus_on->current_bus_mode == BUS_MODE_PCIX)
964 limitation = slot_cur->bus_on->slots_at_66_pcix;
966 limitation = slot_cur->bus_on->slots_at_66_conv;
969 limitation = slot_cur->bus_on->slots_at_100_pcix;
972 limitation = slot_cur->bus_on->slots_at_133_pcix;
976 if ((count + 1) > limitation)
981 static inline void print_card_capability(struct slot *slot_cur)
983 info("capability of the card is ");
984 if ((slot_cur->ext_status & CARD_INFO) == PCIX133)
985 info(" 133 MHz PCI-X\n");
986 else if ((slot_cur->ext_status & CARD_INFO) == PCIX66)
987 info(" 66 MHz PCI-X\n");
988 else if ((slot_cur->ext_status & CARD_INFO) == PCI66)
989 info(" 66 MHz PCI\n");
991 info(" 33 MHz PCI\n");
995 /* This routine will power on the slot, configure the device(s) and find the
997 * Parameters: hotplug_slot
998 * Returns: 0 or failure codes
1000 static int enable_slot(struct hotplug_slot *hs)
1003 struct slot *slot_cur;
1005 struct pci_func *tmp_func;
1007 ibmphp_lock_operations();
1009 debug("ENABLING SLOT........\n");
1010 slot_cur = hs->private;
1012 rc = validate(slot_cur, ENABLE);
1014 err("validate function failed\n");
1018 attn_LED_blink(slot_cur);
1020 rc = set_bus(slot_cur);
1022 err("was not able to set the bus\n");
1026 /*-----------------debugging------------------------------*/
1027 get_cur_bus_info(&slot_cur);
1028 debug("the current bus speed right after set_bus = %x\n",
1029 slot_cur->bus_on->current_speed);
1030 /*----------------------------------------------------------*/
1032 rc = check_limitations(slot_cur);
1034 err("Adding this card exceeds the limitations of this bus.\n");
1035 err("(i.e., >1 133MHz cards running on same bus, or >2 66 PCI cards running on same bus.\n");
1036 err("Try hot-adding into another bus\n");
1041 rc = power_on(slot_cur);
1044 err("something wrong when powering up... please see below for details\n");
1045 /* need to turn off before on, otherwise, blinking overwrites */
1048 if (slot_update(&slot_cur)) {
1054 /* Check to see the error of why it failed */
1055 if ((SLOT_POWER(slot_cur->status)) &&
1056 !(SLOT_PWRGD(slot_cur->status)))
1057 err("power fault occurred trying to power up\n");
1058 else if (SLOT_BUS_SPEED(slot_cur->status)) {
1059 err("bus speed mismatch occurred. please check current bus speed and card capability\n");
1060 print_card_capability(slot_cur);
1061 } else if (SLOT_BUS_MODE(slot_cur->ext_status)) {
1062 err("bus mode mismatch occurred. please check current bus mode and card capability\n");
1063 print_card_capability(slot_cur);
1065 ibmphp_update_slot_info(slot_cur);
1068 debug("after power_on\n");
1069 /*-----------------------debugging---------------------------*/
1070 get_cur_bus_info(&slot_cur);
1071 debug("the current bus speed right after power_on = %x\n",
1072 slot_cur->bus_on->current_speed);
1073 /*----------------------------------------------------------*/
1075 rc = slot_update(&slot_cur);
1080 if (SLOT_POWER(slot_cur->status) && !(SLOT_PWRGD(slot_cur->status))) {
1081 err("power fault occurred trying to power up...\n");
1084 if (SLOT_POWER(slot_cur->status) && (SLOT_BUS_SPEED(slot_cur->status))) {
1085 err("bus speed mismatch occurred. please check current bus speed and card capability\n");
1086 print_card_capability(slot_cur);
1089 /* Don't think this case will happen after above checks...
1090 * but just in case, for paranoia sake */
1091 if (!(SLOT_POWER(slot_cur->status))) {
1092 err("power on failed...\n");
1096 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1097 if (!slot_cur->func) {
1098 /* We cannot do update_slot_info here, since no memory for
1099 * kmalloc n.e.ways, and update_slot_info allocates some */
1103 slot_cur->func->busno = slot_cur->bus;
1104 slot_cur->func->device = slot_cur->device;
1105 for (i = 0; i < 4; i++)
1106 slot_cur->func->irq[i] = slot_cur->irq[i];
1108 debug("b4 configure_card, slot_cur->bus = %x, slot_cur->device = %x\n",
1109 slot_cur->bus, slot_cur->device);
1111 if (ibmphp_configure_card(slot_cur->func, slot_cur->number)) {
1112 err("configure_card was unsuccessful...\n");
1113 /* true because don't need to actually deallocate resources,
1114 * just remove references */
1115 ibmphp_unconfigure_card(&slot_cur, 1);
1116 debug("after unconfigure_card\n");
1117 slot_cur->func = NULL;
1124 tmp_func = ibm_slot_find(slot_cur->bus, slot_cur->func->device,
1126 if (tmp_func && !(tmp_func->dev))
1127 ibm_configure_device(tmp_func);
1131 if (slot_update(&slot_cur)) {
1135 ibmphp_print_test();
1136 rc = ibmphp_update_slot_info(slot_cur);
1138 ibmphp_unlock_operations();
1142 attn_off(slot_cur); /* need to turn off if was blinking b4 */
1145 rcpr = slot_update(&slot_cur);
1150 ibmphp_update_slot_info(slot_cur);
1154 attn_off(slot_cur); /* need to turn off if was blinking b4 */
1156 rcpr = power_off(slot_cur);
1164 /**************************************************************
1165 * HOT REMOVING ADAPTER CARD *
1166 * INPUT: POINTER TO THE HOTPLUG SLOT STRUCTURE *
1167 * OUTPUT: SUCCESS 0 ; FAILURE: UNCONFIGURE , VALIDATE *
1169 **************************************************************/
1170 static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot)
1172 struct slot *slot = hotplug_slot->private;
1175 ibmphp_lock_operations();
1176 rc = ibmphp_do_disable_slot(slot);
1177 ibmphp_unlock_operations();
1181 int ibmphp_do_disable_slot(struct slot *slot_cur)
1186 debug("DISABLING SLOT...\n");
1188 if ((slot_cur == NULL) || (slot_cur->ctrl == NULL))
1191 flag = slot_cur->flag;
1195 rc = validate(slot_cur, DISABLE);
1196 /* checking if powered off already & valid slot # */
1200 attn_LED_blink(slot_cur);
1202 if (slot_cur->func == NULL) {
1203 /* We need this for functions that were there on bootup */
1204 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1205 if (!slot_cur->func) {
1209 slot_cur->func->busno = slot_cur->bus;
1210 slot_cur->func->device = slot_cur->device;
1213 ibm_unconfigure_device(slot_cur->func);
1216 * If we got here from latch suddenly opening on operating card or
1217 * a power fault, there's no power to the card, so cannot
1218 * read from it to determine what resources it occupied. This operation
1219 * is forbidden anyhow. The best we can do is remove it from kernel
1227 rc = ibmphp_unconfigure_card(&slot_cur, 0);
1228 slot_cur->func = NULL;
1229 debug("in disable_slot. after unconfigure_card\n");
1231 err("could not unconfigure card.\n");
1235 rc = ibmphp_hpc_writeslot(slot_cur, HPC_SLOT_OFF);
1240 rc = slot_update(&slot_cur);
1244 rc = ibmphp_update_slot_info(slot_cur);
1245 ibmphp_print_test();
1250 /* Need to turn off if was blinking b4 */
1253 if (slot_update(&slot_cur)) {
1258 ibmphp_update_slot_info(slot_cur);
1262 struct hotplug_slot_ops ibmphp_hotplug_slot_ops = {
1263 .set_attention_status = set_attention_status,
1264 .enable_slot = enable_slot,
1265 .disable_slot = ibmphp_disable_slot,
1266 .hardware_test = NULL,
1267 .get_power_status = get_power_status,
1268 .get_attention_status = get_attention_status,
1269 .get_latch_status = get_latch_status,
1270 .get_adapter_status = get_adapter_present,
1271 /* .get_max_adapter_speed = get_max_adapter_speed,
1272 .get_bus_name_status = get_bus_name,
1276 static void ibmphp_unload(void)
1279 debug("after slots\n");
1280 ibmphp_free_resources();
1281 debug("after resources\n");
1282 ibmphp_free_bus_info_queue();
1283 debug("after bus info\n");
1284 ibmphp_free_ebda_hpc_queue();
1285 debug("after ebda hpc\n");
1286 ibmphp_free_ebda_pci_rsrc_queue();
1287 debug("after ebda pci rsrc\n");
1288 kfree(ibmphp_pci_bus);
1291 static int __init ibmphp_init(void)
1293 struct pci_bus *bus;
1299 info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
1301 ibmphp_pci_bus = kmalloc(sizeof(*ibmphp_pci_bus), GFP_KERNEL);
1302 if (!ibmphp_pci_bus) {
1307 bus = pci_find_bus(0, 0);
1309 err("Can't find the root pci bus, can not continue\n");
1313 memcpy(ibmphp_pci_bus, bus, sizeof(*ibmphp_pci_bus));
1315 ibmphp_debug = debug;
1317 ibmphp_hpc_initvars();
1319 for (i = 0; i < 16; i++)
1322 rc = ibmphp_access_ebda();
1325 debug("after ibmphp_access_ebda()\n");
1327 rc = ibmphp_rsrc_init();
1330 debug("AFTER Resource & EBDA INITIALIZATIONS\n");
1332 max_slots = get_max_slots();
1334 rc = ibmphp_register_pci();
1343 ibmphp_print_test();
1344 rc = ibmphp_hpc_start_poll_thread();
1356 static void __exit ibmphp_exit(void)
1358 ibmphp_hpc_stop_poll_thread();
1359 debug("after polling\n");
1364 module_init(ibmphp_init);
1365 module_exit(ibmphp_exit);