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);
593 err("out of system memory\n");
597 info->power_status = SLOT_PWRGD(slot_cur->status);
598 info->attention_status = SLOT_ATTN(slot_cur->status,
599 slot_cur->ext_status);
600 info->latch_status = SLOT_LATCH(slot_cur->status);
601 if (!SLOT_PRESENT(slot_cur->status)) {
602 info->adapter_status = 0;
603 /* info->max_adapter_speed_status = MAX_ADAPTER_NONE; */
605 info->adapter_status = 1;
606 /* get_max_adapter_speed_1(slot_cur->hotplug_slot,
607 &info->max_adapter_speed_status, 0); */
610 bus_speed = slot_cur->bus_on->current_speed;
611 mode = slot_cur->bus_on->current_bus_mode;
617 if (mode == BUS_MODE_PCIX)
619 else if (mode == BUS_MODE_PCI)
622 bus_speed = PCI_SPEED_UNKNOWN;
629 bus_speed = PCI_SPEED_UNKNOWN;
632 bus->cur_bus_speed = bus_speed;
635 rc = pci_hp_change_slot_info(slot_cur->hotplug_slot, info);
641 /******************************************************************************
642 * This function will return the pci_func, given bus and devfunc, or NULL. It
643 * is called from visit routines
644 ******************************************************************************/
646 static struct pci_func *ibm_slot_find(u8 busno, u8 device, u8 function)
648 struct pci_func *func_cur;
649 struct slot *slot_cur;
650 list_for_each_entry(slot_cur, &ibmphp_slot_head, ibm_slot_list) {
651 if (slot_cur->func) {
652 func_cur = slot_cur->func;
654 if ((func_cur->busno == busno) &&
655 (func_cur->device == device) &&
656 (func_cur->function == function))
658 func_cur = func_cur->next;
665 /*************************************************************
666 * This routine frees up memory used by struct slot, including
667 * the pointers to pci_func, bus, hotplug_slot, controller,
668 * and deregistering from the hotplug core
669 *************************************************************/
670 static void free_slots(void)
672 struct slot *slot_cur, *next;
674 debug("%s -- enter\n", __func__);
676 list_for_each_entry_safe(slot_cur, next, &ibmphp_slot_head,
678 pci_hp_deregister(slot_cur->hotplug_slot);
680 debug("%s -- exit\n", __func__);
683 static void ibm_unconfigure_device(struct pci_func *func)
685 struct pci_dev *temp;
688 debug("inside %s\n", __func__);
689 debug("func->device = %x, func->function = %x\n",
690 func->device, func->function);
691 debug("func->device << 3 | 0x0 = %x\n", func->device << 3 | 0x0);
693 pci_lock_rescan_remove();
695 for (j = 0; j < 0x08; j++) {
696 temp = pci_get_bus_and_slot(func->busno, (func->device << 3) | j);
698 pci_stop_and_remove_bus_device(temp);
703 pci_dev_put(func->dev);
705 pci_unlock_rescan_remove();
709 * The following function is to fix kernel bug regarding
710 * getting bus entries, here we manually add those primary
711 * bus entries to kernel bus structure whenever apply
713 static u8 bus_structure_fixup(u8 busno)
715 struct pci_bus *bus, *b;
719 if (pci_find_bus(0, busno) || !(ibmphp_find_same_bus_num(busno)))
722 bus = kmalloc(sizeof(*bus), GFP_KERNEL);
724 err("%s - out of memory\n", __func__);
727 dev = kmalloc(sizeof(*dev), GFP_KERNEL);
730 err("%s - out of memory\n", __func__);
735 bus->ops = ibmphp_pci_bus->ops;
737 for (dev->devfn = 0; dev->devfn < 256; dev->devfn += 8) {
738 if (!pci_read_config_word(dev, PCI_VENDOR_ID, &l) &&
739 (l != 0x0000) && (l != 0xffff)) {
740 debug("%s - Inside bus_structure_fixup()\n",
742 b = pci_scan_bus(busno, ibmphp_pci_bus->ops, NULL);
746 pci_bus_add_devices(b);
757 static int ibm_configure_device(struct pci_func *func)
759 struct pci_bus *child;
761 int flag = 0; /* this is to make sure we don't double scan the bus,
762 for bridged devices primarily */
764 pci_lock_rescan_remove();
766 if (!(bus_structure_fixup(func->busno)))
768 if (func->dev == NULL)
769 func->dev = pci_get_bus_and_slot(func->busno,
770 PCI_DEVFN(func->device, func->function));
772 if (func->dev == NULL) {
773 struct pci_bus *bus = pci_find_bus(0, func->busno);
777 num = pci_scan_slot(bus,
778 PCI_DEVFN(func->device, func->function));
780 pci_bus_add_devices(bus);
782 func->dev = pci_get_bus_and_slot(func->busno,
783 PCI_DEVFN(func->device, func->function));
784 if (func->dev == NULL) {
785 err("ERROR... : pci_dev still NULL\n");
789 if (!(flag) && (func->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE)) {
790 pci_hp_add_bridge(func->dev);
791 child = func->dev->subordinate;
793 pci_bus_add_devices(child);
797 pci_unlock_rescan_remove();
801 /*******************************************************
802 * Returns whether the bus is empty or not
803 *******************************************************/
804 static int is_bus_empty(struct slot *slot_cur)
807 struct slot *tmp_slot;
808 u8 i = slot_cur->bus_on->slot_min;
810 while (i <= slot_cur->bus_on->slot_max) {
811 if (i == slot_cur->number) {
815 tmp_slot = ibmphp_get_slot_from_physical_num(i);
818 rc = slot_update(&tmp_slot);
821 if (SLOT_PRESENT(tmp_slot->status) &&
822 SLOT_PWRGD(tmp_slot->status))
829 /***********************************************************
830 * If the HPC permits and the bus currently empty, tries to set the
831 * bus speed and mode at the maximum card and bus capability
833 * Returns: bus is set (0) or error code
834 ***********************************************************/
835 static int set_bus(struct slot *slot_cur)
841 static const struct pci_device_id ciobx[] = {
842 { PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, 0x0101) },
846 debug("%s - entry slot # %d\n", __func__, slot_cur->number);
847 if (SET_BUS_STATUS(slot_cur->ctrl) && is_bus_empty(slot_cur)) {
848 rc = slot_update(&slot_cur);
851 speed = SLOT_SPEED(slot_cur->ext_status);
852 debug("ext_status = %x, speed = %x\n", slot_cur->ext_status, speed);
854 case HPC_SLOT_SPEED_33:
855 cmd = HPC_BUS_33CONVMODE;
857 case HPC_SLOT_SPEED_66:
858 if (SLOT_PCIX(slot_cur->ext_status)) {
859 if ((slot_cur->supported_speed >= BUS_SPEED_66) &&
860 (slot_cur->supported_bus_mode == BUS_MODE_PCIX))
861 cmd = HPC_BUS_66PCIXMODE;
862 else if (!SLOT_BUS_MODE(slot_cur->ext_status))
863 /* if max slot/bus capability is 66 pci
864 and there's no bus mode mismatch, then
865 the adapter supports 66 pci */
866 cmd = HPC_BUS_66CONVMODE;
868 cmd = HPC_BUS_33CONVMODE;
870 if (slot_cur->supported_speed >= BUS_SPEED_66)
871 cmd = HPC_BUS_66CONVMODE;
873 cmd = HPC_BUS_33CONVMODE;
876 case HPC_SLOT_SPEED_133:
877 switch (slot_cur->supported_speed) {
879 cmd = HPC_BUS_33CONVMODE;
882 if (slot_cur->supported_bus_mode == BUS_MODE_PCIX)
883 cmd = HPC_BUS_66PCIXMODE;
885 cmd = HPC_BUS_66CONVMODE;
888 cmd = HPC_BUS_100PCIXMODE;
891 /* This is to take care of the bug in CIOBX chip */
892 if (pci_dev_present(ciobx))
893 ibmphp_hpc_writeslot(slot_cur,
894 HPC_BUS_100PCIXMODE);
895 cmd = HPC_BUS_133PCIXMODE;
898 err("Wrong bus speed\n");
903 err("wrong slot speed\n");
906 debug("setting bus speed for slot %d, cmd %x\n",
907 slot_cur->number, cmd);
908 retval = ibmphp_hpc_writeslot(slot_cur, cmd);
910 err("setting bus speed failed\n");
913 if (CTLR_RESULT(slot_cur->ctrl->status)) {
914 err("command not completed successfully in set_bus\n");
918 /* This is for x440, once Brandon fixes the firmware,
919 will not need this delay */
921 debug("%s -Exit\n", __func__);
925 /* This routine checks the bus limitations that the slot is on from the BIOS.
926 * This is used in deciding whether or not to power up the slot.
927 * (electrical/spec limitations. For example, >1 133 MHz or >2 66 PCI cards on
930 * Returns: 0 = no limitations, -EINVAL = exceeded limitations on the bus
932 static int check_limitations(struct slot *slot_cur)
935 struct slot *tmp_slot;
939 for (i = slot_cur->bus_on->slot_min; i <= slot_cur->bus_on->slot_max; i++) {
940 tmp_slot = ibmphp_get_slot_from_physical_num(i);
943 if ((SLOT_PWRGD(tmp_slot->status)) &&
944 !(SLOT_CONNECT(tmp_slot->status)))
947 get_cur_bus_info(&slot_cur);
948 switch (slot_cur->bus_on->current_speed) {
950 limitation = slot_cur->bus_on->slots_at_33_conv;
953 if (slot_cur->bus_on->current_bus_mode == BUS_MODE_PCIX)
954 limitation = slot_cur->bus_on->slots_at_66_pcix;
956 limitation = slot_cur->bus_on->slots_at_66_conv;
959 limitation = slot_cur->bus_on->slots_at_100_pcix;
962 limitation = slot_cur->bus_on->slots_at_133_pcix;
966 if ((count + 1) > limitation)
971 static inline void print_card_capability(struct slot *slot_cur)
973 info("capability of the card is ");
974 if ((slot_cur->ext_status & CARD_INFO) == PCIX133)
975 info(" 133 MHz PCI-X\n");
976 else if ((slot_cur->ext_status & CARD_INFO) == PCIX66)
977 info(" 66 MHz PCI-X\n");
978 else if ((slot_cur->ext_status & CARD_INFO) == PCI66)
979 info(" 66 MHz PCI\n");
981 info(" 33 MHz PCI\n");
985 /* This routine will power on the slot, configure the device(s) and find the
987 * Parameters: hotplug_slot
988 * Returns: 0 or failure codes
990 static int enable_slot(struct hotplug_slot *hs)
993 struct slot *slot_cur;
995 struct pci_func *tmp_func;
997 ibmphp_lock_operations();
999 debug("ENABLING SLOT........\n");
1000 slot_cur = hs->private;
1002 rc = validate(slot_cur, ENABLE);
1004 err("validate function failed\n");
1008 attn_LED_blink(slot_cur);
1010 rc = set_bus(slot_cur);
1012 err("was not able to set the bus\n");
1016 /*-----------------debugging------------------------------*/
1017 get_cur_bus_info(&slot_cur);
1018 debug("the current bus speed right after set_bus = %x\n",
1019 slot_cur->bus_on->current_speed);
1020 /*----------------------------------------------------------*/
1022 rc = check_limitations(slot_cur);
1024 err("Adding this card exceeds the limitations of this bus.\n");
1025 err("(i.e., >1 133MHz cards running on same bus, or >2 66 PCI cards running on same bus.\n");
1026 err("Try hot-adding into another bus\n");
1031 rc = power_on(slot_cur);
1034 err("something wrong when powering up... please see below for details\n");
1035 /* need to turn off before on, otherwise, blinking overwrites */
1038 if (slot_update(&slot_cur)) {
1044 /* Check to see the error of why it failed */
1045 if ((SLOT_POWER(slot_cur->status)) &&
1046 !(SLOT_PWRGD(slot_cur->status)))
1047 err("power fault occurred trying to power up\n");
1048 else if (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);
1051 } else if (SLOT_BUS_MODE(slot_cur->ext_status)) {
1052 err("bus mode mismatch occurred. please check current bus mode and card capability\n");
1053 print_card_capability(slot_cur);
1055 ibmphp_update_slot_info(slot_cur);
1058 debug("after power_on\n");
1059 /*-----------------------debugging---------------------------*/
1060 get_cur_bus_info(&slot_cur);
1061 debug("the current bus speed right after power_on = %x\n",
1062 slot_cur->bus_on->current_speed);
1063 /*----------------------------------------------------------*/
1065 rc = slot_update(&slot_cur);
1070 if (SLOT_POWER(slot_cur->status) && !(SLOT_PWRGD(slot_cur->status))) {
1071 err("power fault occurred trying to power up...\n");
1074 if (SLOT_POWER(slot_cur->status) && (SLOT_BUS_SPEED(slot_cur->status))) {
1075 err("bus speed mismatch occurred. please check current bus speed and card capability\n");
1076 print_card_capability(slot_cur);
1079 /* Don't think this case will happen after above checks...
1080 * but just in case, for paranoia sake */
1081 if (!(SLOT_POWER(slot_cur->status))) {
1082 err("power on failed...\n");
1086 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1087 if (!slot_cur->func) {
1088 /* We cannot do update_slot_info here, since no memory for
1089 * kmalloc n.e.ways, and update_slot_info allocates some */
1090 err("out of system memory\n");
1094 slot_cur->func->busno = slot_cur->bus;
1095 slot_cur->func->device = slot_cur->device;
1096 for (i = 0; i < 4; i++)
1097 slot_cur->func->irq[i] = slot_cur->irq[i];
1099 debug("b4 configure_card, slot_cur->bus = %x, slot_cur->device = %x\n",
1100 slot_cur->bus, slot_cur->device);
1102 if (ibmphp_configure_card(slot_cur->func, slot_cur->number)) {
1103 err("configure_card was unsuccessful...\n");
1104 /* true because don't need to actually deallocate resources,
1105 * just remove references */
1106 ibmphp_unconfigure_card(&slot_cur, 1);
1107 debug("after unconfigure_card\n");
1108 slot_cur->func = NULL;
1115 tmp_func = ibm_slot_find(slot_cur->bus, slot_cur->func->device,
1117 if (tmp_func && !(tmp_func->dev))
1118 ibm_configure_device(tmp_func);
1122 if (slot_update(&slot_cur)) {
1126 ibmphp_print_test();
1127 rc = ibmphp_update_slot_info(slot_cur);
1129 ibmphp_unlock_operations();
1133 attn_off(slot_cur); /* need to turn off if was blinking b4 */
1136 rcpr = slot_update(&slot_cur);
1141 ibmphp_update_slot_info(slot_cur);
1145 attn_off(slot_cur); /* need to turn off if was blinking b4 */
1147 rcpr = power_off(slot_cur);
1155 /**************************************************************
1156 * HOT REMOVING ADAPTER CARD *
1157 * INPUT: POINTER TO THE HOTPLUG SLOT STRUCTURE *
1158 * OUTPUT: SUCCESS 0 ; FAILURE: UNCONFIGURE , VALIDATE *
1160 **************************************************************/
1161 static int ibmphp_disable_slot(struct hotplug_slot *hotplug_slot)
1163 struct slot *slot = hotplug_slot->private;
1166 ibmphp_lock_operations();
1167 rc = ibmphp_do_disable_slot(slot);
1168 ibmphp_unlock_operations();
1172 int ibmphp_do_disable_slot(struct slot *slot_cur)
1177 debug("DISABLING SLOT...\n");
1179 if ((slot_cur == NULL) || (slot_cur->ctrl == NULL))
1182 flag = slot_cur->flag;
1186 rc = validate(slot_cur, DISABLE);
1187 /* checking if powered off already & valid slot # */
1191 attn_LED_blink(slot_cur);
1193 if (slot_cur->func == NULL) {
1194 /* We need this for functions that were there on bootup */
1195 slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
1196 if (!slot_cur->func) {
1197 err("out of system memory\n");
1201 slot_cur->func->busno = slot_cur->bus;
1202 slot_cur->func->device = slot_cur->device;
1205 ibm_unconfigure_device(slot_cur->func);
1208 * If we got here from latch suddenly opening on operating card or
1209 * a power fault, there's no power to the card, so cannot
1210 * read from it to determine what resources it occupied. This operation
1211 * is forbidden anyhow. The best we can do is remove it from kernel
1219 rc = ibmphp_unconfigure_card(&slot_cur, 0);
1220 slot_cur->func = NULL;
1221 debug("in disable_slot. after unconfigure_card\n");
1223 err("could not unconfigure card.\n");
1227 rc = ibmphp_hpc_writeslot(slot_cur, HPC_SLOT_OFF);
1232 rc = slot_update(&slot_cur);
1236 rc = ibmphp_update_slot_info(slot_cur);
1237 ibmphp_print_test();
1242 /* Need to turn off if was blinking b4 */
1245 if (slot_update(&slot_cur)) {
1250 ibmphp_update_slot_info(slot_cur);
1254 struct hotplug_slot_ops ibmphp_hotplug_slot_ops = {
1255 .set_attention_status = set_attention_status,
1256 .enable_slot = enable_slot,
1257 .disable_slot = ibmphp_disable_slot,
1258 .hardware_test = NULL,
1259 .get_power_status = get_power_status,
1260 .get_attention_status = get_attention_status,
1261 .get_latch_status = get_latch_status,
1262 .get_adapter_status = get_adapter_present,
1263 /* .get_max_adapter_speed = get_max_adapter_speed,
1264 .get_bus_name_status = get_bus_name,
1268 static void ibmphp_unload(void)
1271 debug("after slots\n");
1272 ibmphp_free_resources();
1273 debug("after resources\n");
1274 ibmphp_free_bus_info_queue();
1275 debug("after bus info\n");
1276 ibmphp_free_ebda_hpc_queue();
1277 debug("after ebda hpc\n");
1278 ibmphp_free_ebda_pci_rsrc_queue();
1279 debug("after ebda pci rsrc\n");
1280 kfree(ibmphp_pci_bus);
1283 static int __init ibmphp_init(void)
1285 struct pci_bus *bus;
1291 info(DRIVER_DESC " version: " DRIVER_VERSION "\n");
1293 ibmphp_pci_bus = kmalloc(sizeof(*ibmphp_pci_bus), GFP_KERNEL);
1294 if (!ibmphp_pci_bus) {
1295 err("out of memory\n");
1300 bus = pci_find_bus(0, 0);
1302 err("Can't find the root pci bus, can not continue\n");
1306 memcpy(ibmphp_pci_bus, bus, sizeof(*ibmphp_pci_bus));
1308 ibmphp_debug = debug;
1310 ibmphp_hpc_initvars();
1312 for (i = 0; i < 16; i++)
1315 rc = ibmphp_access_ebda();
1318 debug("after ibmphp_access_ebda()\n");
1320 rc = ibmphp_rsrc_init();
1323 debug("AFTER Resource & EBDA INITIALIZATIONS\n");
1325 max_slots = get_max_slots();
1327 rc = ibmphp_register_pci();
1336 ibmphp_print_test();
1337 rc = ibmphp_hpc_start_poll_thread();
1349 static void __exit ibmphp_exit(void)
1351 ibmphp_hpc_stop_poll_thread();
1352 debug("after polling\n");
1357 module_init(ibmphp_init);
1358 module_exit(ibmphp_exit);