2 * IBM Hot Plug Controller Driver
4 * Written By: Irene Zubarev, IBM Corporation
6 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
7 * Copyright (C) 2001,2002 IBM Corp.
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
19 * NON INFRINGEMENT. See the GNU General Public License for more
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 * Send feedback to <gregkh@us.ibm.com>
30 #include <linux/module.h>
31 #include <linux/slab.h>
32 #include <linux/pci.h>
33 #include <linux/list.h>
37 static int configure_device(struct pci_func
*);
38 static int configure_bridge(struct pci_func
**, u8
);
39 static struct res_needed
*scan_behind_bridge(struct pci_func
*, u8
);
40 static int add_new_bus (struct bus_node
*, struct resource_node
*, struct resource_node
*, struct resource_node
*, u8
);
41 static u8
find_sec_number (u8 primary_busno
, u8 slotno
);
44 * NOTE..... If BIOS doesn't provide default routing, we assign:
45 * 9 for SCSI, 10 for LAN adapters, and 11 for everything else.
46 * If adapter is bridged, then we assign 11 to it and devices behind it.
47 * We also assign the same irq numbers for multi function devices.
48 * These are PIC mode, so shouldn't matter n.e.ways (hopefully)
50 static void assign_alt_irq (struct pci_func
* cur_func
, u8 class_code
)
53 for (j
= 0; j
< 4; j
++) {
54 if (cur_func
->irq
[j
] == 0xff) {
56 case PCI_BASE_CLASS_STORAGE
:
57 cur_func
->irq
[j
] = SCSI_IRQ
;
59 case PCI_BASE_CLASS_NETWORK
:
60 cur_func
->irq
[j
] = LAN_IRQ
;
63 cur_func
->irq
[j
] = OTHER_IRQ
;
71 * Configures the device to be added (will allocate needed resources if it
72 * can), the device can be a bridge or a regular pci device, can also be
75 * Input: function to be added
77 * TO DO: The error case with Multifunction device or multi function bridge,
78 * if there is an error, will need to go through all previous functions and
79 * unconfigure....or can add some code into unconfigure_card....
81 int ibmphp_configure_card (struct pci_func
*func
, u8 slotno
)
86 u8 hdr_type
, device
, sec_number
;
88 struct pci_func
*newfunc
; /* for multi devices */
89 struct pci_func
*cur_func
, *prev_func
;
93 u8 valid_device
= 0x00; /* to see if we are able to read from card any device info at all */
95 debug ("inside configure_card, func->busno = %x\n", func
->busno
);
97 device
= func
->device
;
100 /* We only get bus and device from IRQ routing table. So at this point,
101 * func->busno is correct, and func->device contains only device (at the 5
105 /* For every function on the card */
106 for (function
= 0x00; function
< 0x08; function
++) {
107 unsigned int devfn
= PCI_DEVFN(device
, function
);
108 ibmphp_pci_bus
->number
= cur_func
->busno
;
110 cur_func
->function
= function
;
112 debug ("inside the loop, cur_func->busno = %x, cur_func->device = %x, cur_func->function = %x\n",
113 cur_func
->busno
, cur_func
->device
, cur_func
->function
);
115 pci_bus_read_config_word (ibmphp_pci_bus
, devfn
, PCI_VENDOR_ID
, &vendor_id
);
117 debug ("vendor_id is %x\n", vendor_id
);
118 if (vendor_id
!= PCI_VENDOR_ID_NOTVALID
) {
119 /* found correct device!!! */
120 debug ("found valid device, vendor_id = %x\n", vendor_id
);
124 /* header: x x x x x x x x
125 * | |___________|=> 1=PPB bridge, 0=normal device, 2=CardBus Bridge
126 * |_=> 0 = single function device, 1 = multi-function device
129 pci_bus_read_config_byte (ibmphp_pci_bus
, devfn
, PCI_HEADER_TYPE
, &hdr_type
);
130 pci_bus_read_config_dword (ibmphp_pci_bus
, devfn
, PCI_CLASS_REVISION
, &class);
132 class_code
= class >> 24;
133 debug ("hrd_type = %x, class = %x, class_code %x\n", hdr_type
, class, class_code
);
134 class >>= 8; /* to take revision out, class = class.subclass.prog i/f */
135 if (class == PCI_CLASS_NOT_DEFINED_VGA
) {
136 err ("The device %x is VGA compatible and as is not supported for hot plugging. "
137 "Please choose another device.\n", cur_func
->device
);
139 } else if (class == PCI_CLASS_DISPLAY_VGA
) {
140 err ("The device %x is not supported for hot plugging. "
141 "Please choose another device.\n", cur_func
->device
);
145 case PCI_HEADER_TYPE_NORMAL
:
146 debug ("single device case.... vendor id = %x, hdr_type = %x, class = %x\n", vendor_id
, hdr_type
, class);
147 assign_alt_irq (cur_func
, class_code
);
148 if ((rc
= configure_device (cur_func
)) < 0) {
149 /* We need to do this in case some other BARs were properly inserted */
150 err ("was not able to configure devfunc %x on bus %x.\n",
151 cur_func
->device
, cur_func
->busno
);
155 cur_func
->next
= NULL
;
158 case PCI_HEADER_TYPE_MULTIDEVICE
:
159 assign_alt_irq (cur_func
, class_code
);
160 if ((rc
= configure_device (cur_func
)) < 0) {
161 /* We need to do this in case some other BARs were properly inserted */
162 err ("was not able to configure devfunc %x on bus %x...bailing out\n",
163 cur_func
->device
, cur_func
->busno
);
167 newfunc
= kzalloc(sizeof(*newfunc
), GFP_KERNEL
);
169 err ("out of system memory\n");
172 newfunc
->busno
= cur_func
->busno
;
173 newfunc
->device
= device
;
174 cur_func
->next
= newfunc
;
176 for (j
= 0; j
< 4; j
++)
177 newfunc
->irq
[j
] = cur_func
->irq
[j
];
179 case PCI_HEADER_TYPE_MULTIBRIDGE
:
181 if (class != PCI_CLASS_BRIDGE_PCI
) {
182 err ("This %x is not PCI-to-PCI bridge, and as is not supported for hot-plugging. "
183 "Please insert another card.\n", cur_func
->device
);
186 assign_alt_irq (cur_func
, class_code
);
187 rc
= configure_bridge (&cur_func
, slotno
);
189 err ("You chose to insert Single Bridge, or nested bridges, this is not supported...\n");
190 err ("Bus %x, devfunc %x\n", cur_func
->busno
, cur_func
->device
);
194 /* We need to do this in case some other BARs were properly inserted */
195 err ("was not able to hot-add PPB properly.\n");
196 func
->bus
= 1; /* To indicate to the unconfigure function that this is a PPB */
201 pci_bus_read_config_byte (ibmphp_pci_bus
, devfn
, PCI_SECONDARY_BUS
, &sec_number
);
203 for (i
= 0; i
< 32; i
++) {
204 if (func
->devices
[i
]) {
205 newfunc
= kzalloc(sizeof(*newfunc
), GFP_KERNEL
);
207 err ("out of system memory\n");
210 newfunc
->busno
= sec_number
;
211 newfunc
->device
= (u8
) i
;
212 for (j
= 0; j
< 4; j
++)
213 newfunc
->irq
[j
] = cur_func
->irq
[j
];
216 for (prev_func
= cur_func
; prev_func
->next
; prev_func
= prev_func
->next
) ;
217 prev_func
->next
= newfunc
;
219 cur_func
->next
= newfunc
;
221 rc
= ibmphp_configure_card (newfunc
, slotno
);
222 /* This could only happen if kmalloc failed */
224 /* We need to do this in case bridge itself got configured properly, but devices behind it failed */
225 func
->bus
= 1; /* To indicate to the unconfigure function that this is a PPB */
233 newfunc
= kzalloc(sizeof(*newfunc
), GFP_KERNEL
);
235 err ("out of system memory\n");
238 newfunc
->busno
= cur_func
->busno
;
239 newfunc
->device
= device
;
240 for (j
= 0; j
< 4; j
++)
241 newfunc
->irq
[j
] = cur_func
->irq
[j
];
242 for (prev_func
= cur_func
; prev_func
->next
; prev_func
= prev_func
->next
) ;
243 prev_func
->next
= newfunc
;
246 case PCI_HEADER_TYPE_BRIDGE
:
248 debug ("class now is %x\n", class);
249 if (class != PCI_CLASS_BRIDGE_PCI
) {
250 err ("This %x is not PCI-to-PCI bridge, and as is not supported for hot-plugging. "
251 "Please insert another card.\n", cur_func
->device
);
255 assign_alt_irq (cur_func
, class_code
);
257 debug ("cur_func->busno b4 configure_bridge is %x\n", cur_func
->busno
);
258 rc
= configure_bridge (&cur_func
, slotno
);
260 err ("You chose to insert Single Bridge, or nested bridges, this is not supported...\n");
261 err ("Bus %x, devfunc %x\n", cur_func
->busno
, cur_func
->device
);
265 /* We need to do this in case some other BARs were properly inserted */
266 func
->bus
= 1; /* To indicate to the unconfigure function that this is a PPB */
267 err ("was not able to hot-add PPB properly.\n");
271 debug ("cur_func->busno = %x, device = %x, function = %x\n",
272 cur_func
->busno
, device
, function
);
273 pci_bus_read_config_byte (ibmphp_pci_bus
, devfn
, PCI_SECONDARY_BUS
, &sec_number
);
274 debug ("after configuring bridge..., sec_number = %x\n", sec_number
);
276 for (i
= 0; i
< 32; i
++) {
277 if (func
->devices
[i
]) {
278 debug ("inside for loop, device is %x\n", i
);
279 newfunc
= kzalloc(sizeof(*newfunc
), GFP_KERNEL
);
281 err (" out of system memory\n");
284 newfunc
->busno
= sec_number
;
285 newfunc
->device
= (u8
) i
;
286 for (j
= 0; j
< 4; j
++)
287 newfunc
->irq
[j
] = cur_func
->irq
[j
];
290 for (prev_func
= cur_func
; prev_func
->next
; prev_func
= prev_func
->next
) ;
291 prev_func
->next
= newfunc
;
293 cur_func
->next
= newfunc
;
295 rc
= ibmphp_configure_card (newfunc
, slotno
);
297 /* Again, this case should not happen... For complete paranoia, will need to call remove_bus */
299 /* We need to do this in case some other BARs were properly inserted */
300 func
->bus
= 1; /* To indicate to the unconfigure function that this is a PPB */
311 err ("MAJOR PROBLEM!!!!, header type not supported? %x\n", hdr_type
);
314 } /* end of switch */
315 } /* end of valid device */
319 err ("Cannot find any valid devices on the card. Or unable to read from card.\n");
326 for (i
= 0; i
< cleanup_count
; i
++) {
327 if (cur_func
->io
[i
]) {
328 ibmphp_remove_resource (cur_func
->io
[i
]);
329 cur_func
->io
[i
] = NULL
;
330 } else if (cur_func
->pfmem
[i
]) {
331 ibmphp_remove_resource (cur_func
->pfmem
[i
]);
332 cur_func
->pfmem
[i
] = NULL
;
333 } else if (cur_func
->mem
[i
]) {
334 ibmphp_remove_resource (cur_func
->mem
[i
]);
335 cur_func
->mem
[i
] = NULL
;
342 * This function configures the pci BARs of a single device.
343 * Input: pointer to the pci_func
344 * Output: configured PCI, 0, or error
346 static int configure_device (struct pci_func
*func
)
361 struct resource_node
*io
[6];
362 struct resource_node
*mem
[6];
363 struct resource_node
*mem_tmp
;
364 struct resource_node
*pfmem
[6];
367 debug ("%s - inside\n", __func__
);
369 devfn
= PCI_DEVFN(func
->device
, func
->function
);
370 ibmphp_pci_bus
->number
= func
->busno
;
372 for (count
= 0; address
[count
]; count
++) { /* for 6 BARs */
374 /* not sure if i need this. per scott, said maybe need * something like this
375 if devices don't adhere 100% to the spec, so don't want to write
378 pcibios_read_config_byte(cur_func->busno, cur_func->device,
379 PCI_BASE_ADDRESS_0 + 4 * count, &tmp);
380 if (tmp & 0x01) // IO
381 pcibios_write_config_dword(cur_func->busno, cur_func->device,
382 PCI_BASE_ADDRESS_0 + 4 * count, 0xFFFFFFFD);
384 pcibios_write_config_dword(cur_func->busno, cur_func->device,
385 PCI_BASE_ADDRESS_0 + 4 * count, 0xFFFFFFFF);
387 pci_bus_write_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], 0xFFFFFFFF);
388 pci_bus_read_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], &bar
[count
]);
390 if (!bar
[count
]) /* This BAR is not implemented */
393 debug ("Device %x BAR %d wants %x\n", func
->device
, count
, bar
[count
]);
395 if (bar
[count
] & PCI_BASE_ADDRESS_SPACE_IO
) {
397 debug ("inside IO SPACE\n");
399 len
[count
] = bar
[count
] & 0xFFFFFFFC;
400 len
[count
] = ~len
[count
] + 1;
402 debug ("len[count] in IO %x, count %d\n", len
[count
], count
);
404 io
[count
] = kzalloc(sizeof(struct resource_node
), GFP_KERNEL
);
407 err ("out of system memory\n");
410 io
[count
]->type
= IO
;
411 io
[count
]->busno
= func
->busno
;
412 io
[count
]->devfunc
= PCI_DEVFN(func
->device
, func
->function
);
413 io
[count
]->len
= len
[count
];
414 if (ibmphp_check_resource(io
[count
], 0) == 0) {
415 ibmphp_add_resource (io
[count
]);
416 func
->io
[count
] = io
[count
];
418 err ("cannot allocate requested io for bus %x device %x function %x len %x\n",
419 func
->busno
, func
->device
, func
->function
, len
[count
]);
423 pci_bus_write_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], func
->io
[count
]->start
);
425 /* _______________This is for debugging purposes only_____________________ */
426 debug ("b4 writing, the IO address is %x\n", func
->io
[count
]->start
);
427 pci_bus_read_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], &bar
[count
]);
428 debug ("after writing.... the start address is %x\n", bar
[count
]);
429 /* _________________________________________________________________________*/
433 if (bar
[count
] & PCI_BASE_ADDRESS_MEM_PREFETCH
) {
435 debug ("PFMEM SPACE\n");
437 len
[count
] = bar
[count
] & 0xFFFFFFF0;
438 len
[count
] = ~len
[count
] + 1;
440 debug ("len[count] in PFMEM %x, count %d\n", len
[count
], count
);
442 pfmem
[count
] = kzalloc(sizeof(struct resource_node
), GFP_KERNEL
);
444 err ("out of system memory\n");
447 pfmem
[count
]->type
= PFMEM
;
448 pfmem
[count
]->busno
= func
->busno
;
449 pfmem
[count
]->devfunc
= PCI_DEVFN(func
->device
,
451 pfmem
[count
]->len
= len
[count
];
452 pfmem
[count
]->fromMem
= 0;
453 if (ibmphp_check_resource (pfmem
[count
], 0) == 0) {
454 ibmphp_add_resource (pfmem
[count
]);
455 func
->pfmem
[count
] = pfmem
[count
];
457 mem_tmp
= kzalloc(sizeof(*mem_tmp
), GFP_KERNEL
);
459 err ("out of system memory\n");
460 kfree (pfmem
[count
]);
464 mem_tmp
->busno
= pfmem
[count
]->busno
;
465 mem_tmp
->devfunc
= pfmem
[count
]->devfunc
;
466 mem_tmp
->len
= pfmem
[count
]->len
;
467 debug ("there's no pfmem... going into mem.\n");
468 if (ibmphp_check_resource (mem_tmp
, 0) == 0) {
469 ibmphp_add_resource (mem_tmp
);
470 pfmem
[count
]->fromMem
= 1;
471 pfmem
[count
]->rangeno
= mem_tmp
->rangeno
;
472 pfmem
[count
]->start
= mem_tmp
->start
;
473 pfmem
[count
]->end
= mem_tmp
->end
;
474 ibmphp_add_pfmem_from_mem (pfmem
[count
]);
475 func
->pfmem
[count
] = pfmem
[count
];
477 err ("cannot allocate requested pfmem for bus %x, device %x, len %x\n",
478 func
->busno
, func
->device
, len
[count
]);
480 kfree (pfmem
[count
]);
485 pci_bus_write_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], func
->pfmem
[count
]->start
);
487 /*_______________This is for debugging purposes only______________________________*/
488 debug ("b4 writing, start address is %x\n", func
->pfmem
[count
]->start
);
489 pci_bus_read_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], &bar
[count
]);
490 debug ("after writing, start address is %x\n", bar
[count
]);
491 /*_________________________________________________________________________________*/
493 if (bar
[count
] & PCI_BASE_ADDRESS_MEM_TYPE_64
) { /* takes up another dword */
494 debug ("inside the mem 64 case, count %d\n", count
);
496 /* on the 2nd dword, write all 0s, since we can't handle them n.e.ways */
497 pci_bus_write_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], 0x00000000);
501 debug ("REGULAR MEM SPACE\n");
503 len
[count
] = bar
[count
] & 0xFFFFFFF0;
504 len
[count
] = ~len
[count
] + 1;
506 debug ("len[count] in Mem %x, count %d\n", len
[count
], count
);
508 mem
[count
] = kzalloc(sizeof(struct resource_node
), GFP_KERNEL
);
510 err ("out of system memory\n");
513 mem
[count
]->type
= MEM
;
514 mem
[count
]->busno
= func
->busno
;
515 mem
[count
]->devfunc
= PCI_DEVFN(func
->device
,
517 mem
[count
]->len
= len
[count
];
518 if (ibmphp_check_resource (mem
[count
], 0) == 0) {
519 ibmphp_add_resource (mem
[count
]);
520 func
->mem
[count
] = mem
[count
];
522 err ("cannot allocate requested mem for bus %x, device %x, len %x\n",
523 func
->busno
, func
->device
, len
[count
]);
527 pci_bus_write_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], func
->mem
[count
]->start
);
528 /* _______________________This is for debugging purposes only _______________________*/
529 debug ("b4 writing, start address is %x\n", func
->mem
[count
]->start
);
530 pci_bus_read_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], &bar
[count
]);
531 debug ("after writing, the address is %x\n", bar
[count
]);
532 /* __________________________________________________________________________________*/
534 if (bar
[count
] & PCI_BASE_ADDRESS_MEM_TYPE_64
) {
535 /* takes up another dword */
536 debug ("inside mem 64 case, reg. mem, count %d\n", count
);
538 /* on the 2nd dword, write all 0s, since we can't handle them n.e.ways */
539 pci_bus_write_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], 0x00000000);
545 func
->bus
= 0; /* To indicate that this is not a PPB */
546 pci_bus_read_config_byte (ibmphp_pci_bus
, devfn
, PCI_INTERRUPT_PIN
, &irq
);
547 if ((irq
> 0x00) && (irq
< 0x05))
548 pci_bus_write_config_byte (ibmphp_pci_bus
, devfn
, PCI_INTERRUPT_LINE
, func
->irq
[irq
- 1]);
550 pci_bus_write_config_byte (ibmphp_pci_bus
, devfn
, PCI_CACHE_LINE_SIZE
, CACHE
);
551 pci_bus_write_config_byte (ibmphp_pci_bus
, devfn
, PCI_LATENCY_TIMER
, LATENCY
);
553 pci_bus_write_config_dword (ibmphp_pci_bus
, devfn
, PCI_ROM_ADDRESS
, 0x00L
);
554 pci_bus_write_config_word (ibmphp_pci_bus
, devfn
, PCI_COMMAND
, DEVICEENABLE
);
559 /******************************************************************************
560 * This routine configures a PCI-2-PCI bridge and the functions behind it
561 * Parameters: pci_func
563 ******************************************************************************/
564 static int configure_bridge (struct pci_func
**func_passed
, u8 slotno
)
577 u8 need_io_upper
= 0;
578 u8 need_pfmem_upper
= 0;
579 struct res_needed
*amount_needed
= NULL
;
580 struct resource_node
*io
= NULL
;
581 struct resource_node
*bus_io
[2] = {NULL
, NULL
};
582 struct resource_node
*mem
= NULL
;
583 struct resource_node
*bus_mem
[2] = {NULL
, NULL
};
584 struct resource_node
*mem_tmp
= NULL
;
585 struct resource_node
*pfmem
= NULL
;
586 struct resource_node
*bus_pfmem
[2] = {NULL
, NULL
};
587 struct bus_node
*bus
;
593 struct pci_func
*func
= *func_passed
;
598 debug ("%s - enter\n", __func__
);
600 devfn
= PCI_DEVFN(func
->function
, func
->device
);
601 ibmphp_pci_bus
->number
= func
->busno
;
603 /* Configuring necessary info for the bridge so that we could see the devices
607 pci_bus_write_config_byte (ibmphp_pci_bus
, devfn
, PCI_PRIMARY_BUS
, func
->busno
);
609 /* _____________________For debugging purposes only __________________________
610 pci_bus_config_byte (ibmphp_pci_bus, devfn, PCI_PRIMARY_BUS, &pri_number);
611 debug ("primary # written into the bridge is %x\n", pri_number);
612 ___________________________________________________________________________*/
614 /* in EBDA, only get allocated 1 additional bus # per slot */
615 sec_number
= find_sec_number (func
->busno
, slotno
);
616 if (sec_number
== 0xff) {
617 err ("cannot allocate secondary bus number for the bridged device\n");
621 debug ("after find_sec_number, the number we got is %x\n", sec_number
);
622 debug ("AFTER FIND_SEC_NUMBER, func->busno IS %x\n", func
->busno
);
624 pci_bus_write_config_byte (ibmphp_pci_bus
, devfn
, PCI_SECONDARY_BUS
, sec_number
);
626 /* __________________For debugging purposes only __________________________________
627 pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SECONDARY_BUS, &sec_number);
628 debug ("sec_number after write/read is %x\n", sec_number);
629 ________________________________________________________________________________*/
631 pci_bus_write_config_byte (ibmphp_pci_bus
, devfn
, PCI_SUBORDINATE_BUS
, sec_number
);
633 /* __________________For debugging purposes only ____________________________________
634 pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_SUBORDINATE_BUS, &sec_number);
635 debug ("subordinate number after write/read is %x\n", sec_number);
636 __________________________________________________________________________________*/
638 pci_bus_write_config_byte (ibmphp_pci_bus
, devfn
, PCI_CACHE_LINE_SIZE
, CACHE
);
639 pci_bus_write_config_byte (ibmphp_pci_bus
, devfn
, PCI_LATENCY_TIMER
, LATENCY
);
640 pci_bus_write_config_byte (ibmphp_pci_bus
, devfn
, PCI_SEC_LATENCY_TIMER
, LATENCY
);
642 debug ("func->busno is %x\n", func
->busno
);
643 debug ("sec_number after writing is %x\n", sec_number
);
646 /* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
647 !!!!!!!!!!!!!!!NEED TO ADD!!! FAST BACK-TO-BACK ENABLE!!!!!!!!!!!!!!!!!!!!
648 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/
651 /* First we need to allocate mem/io for the bridge itself in case it needs it */
652 for (count
= 0; address
[count
]; count
++) { /* for 2 BARs */
653 pci_bus_write_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], 0xFFFFFFFF);
654 pci_bus_read_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], &bar
[count
]);
657 /* This BAR is not implemented */
658 debug ("so we come here then, eh?, count = %d\n", count
);
661 // tmp_bar = bar[count];
663 debug ("Bar %d wants %x\n", count
, bar
[count
]);
665 if (bar
[count
] & PCI_BASE_ADDRESS_SPACE_IO
) {
667 len
[count
] = bar
[count
] & 0xFFFFFFFC;
668 len
[count
] = ~len
[count
] + 1;
670 debug ("len[count] in IO = %x\n", len
[count
]);
672 bus_io
[count
] = kzalloc(sizeof(struct resource_node
), GFP_KERNEL
);
674 if (!bus_io
[count
]) {
675 err ("out of system memory\n");
679 bus_io
[count
]->type
= IO
;
680 bus_io
[count
]->busno
= func
->busno
;
681 bus_io
[count
]->devfunc
= PCI_DEVFN(func
->device
,
683 bus_io
[count
]->len
= len
[count
];
684 if (ibmphp_check_resource (bus_io
[count
], 0) == 0) {
685 ibmphp_add_resource (bus_io
[count
]);
686 func
->io
[count
] = bus_io
[count
];
688 err ("cannot allocate requested io for bus %x, device %x, len %x\n",
689 func
->busno
, func
->device
, len
[count
]);
690 kfree (bus_io
[count
]);
694 pci_bus_write_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], func
->io
[count
]->start
);
698 if (bar
[count
] & PCI_BASE_ADDRESS_MEM_PREFETCH
) {
700 len
[count
] = bar
[count
] & 0xFFFFFFF0;
701 len
[count
] = ~len
[count
] + 1;
703 debug ("len[count] in PFMEM = %x\n", len
[count
]);
705 bus_pfmem
[count
] = kzalloc(sizeof(struct resource_node
), GFP_KERNEL
);
706 if (!bus_pfmem
[count
]) {
707 err ("out of system memory\n");
711 bus_pfmem
[count
]->type
= PFMEM
;
712 bus_pfmem
[count
]->busno
= func
->busno
;
713 bus_pfmem
[count
]->devfunc
= PCI_DEVFN(func
->device
,
715 bus_pfmem
[count
]->len
= len
[count
];
716 bus_pfmem
[count
]->fromMem
= 0;
717 if (ibmphp_check_resource (bus_pfmem
[count
], 0) == 0) {
718 ibmphp_add_resource (bus_pfmem
[count
]);
719 func
->pfmem
[count
] = bus_pfmem
[count
];
721 mem_tmp
= kzalloc(sizeof(*mem_tmp
), GFP_KERNEL
);
723 err ("out of system memory\n");
728 mem_tmp
->busno
= bus_pfmem
[count
]->busno
;
729 mem_tmp
->devfunc
= bus_pfmem
[count
]->devfunc
;
730 mem_tmp
->len
= bus_pfmem
[count
]->len
;
731 if (ibmphp_check_resource (mem_tmp
, 0) == 0) {
732 ibmphp_add_resource (mem_tmp
);
733 bus_pfmem
[count
]->fromMem
= 1;
734 bus_pfmem
[count
]->rangeno
= mem_tmp
->rangeno
;
735 ibmphp_add_pfmem_from_mem (bus_pfmem
[count
]);
736 func
->pfmem
[count
] = bus_pfmem
[count
];
738 err ("cannot allocate requested pfmem for bus %x, device %x, len %x\n",
739 func
->busno
, func
->device
, len
[count
]);
741 kfree (bus_pfmem
[count
]);
746 pci_bus_write_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], func
->pfmem
[count
]->start
);
748 if (bar
[count
] & PCI_BASE_ADDRESS_MEM_TYPE_64
) {
749 /* takes up another dword */
751 /* on the 2nd dword, write all 0s, since we can't handle them n.e.ways */
752 pci_bus_write_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], 0x00000000);
757 len
[count
] = bar
[count
] & 0xFFFFFFF0;
758 len
[count
] = ~len
[count
] + 1;
760 debug ("len[count] in Memory is %x\n", len
[count
]);
762 bus_mem
[count
] = kzalloc(sizeof(struct resource_node
), GFP_KERNEL
);
763 if (!bus_mem
[count
]) {
764 err ("out of system memory\n");
768 bus_mem
[count
]->type
= MEM
;
769 bus_mem
[count
]->busno
= func
->busno
;
770 bus_mem
[count
]->devfunc
= PCI_DEVFN(func
->device
,
772 bus_mem
[count
]->len
= len
[count
];
773 if (ibmphp_check_resource (bus_mem
[count
], 0) == 0) {
774 ibmphp_add_resource (bus_mem
[count
]);
775 func
->mem
[count
] = bus_mem
[count
];
777 err ("cannot allocate requested mem for bus %x, device %x, len %x\n",
778 func
->busno
, func
->device
, len
[count
]);
779 kfree (bus_mem
[count
]);
783 pci_bus_write_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], func
->mem
[count
]->start
);
785 if (bar
[count
] & PCI_BASE_ADDRESS_MEM_TYPE_64
) {
786 /* takes up another dword */
788 /* on the 2nd dword, write all 0s, since we can't handle them n.e.ways */
789 pci_bus_write_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], 0x00000000);
796 /* Now need to see how much space the devices behind the bridge needed */
797 amount_needed
= scan_behind_bridge (func
, sec_number
);
798 if (amount_needed
== NULL
)
801 ibmphp_pci_bus
->number
= func
->busno
;
802 debug ("after coming back from scan_behind_bridge\n");
803 debug ("amount_needed->not_correct = %x\n", amount_needed
->not_correct
);
804 debug ("amount_needed->io = %x\n", amount_needed
->io
);
805 debug ("amount_needed->mem = %x\n", amount_needed
->mem
);
806 debug ("amount_needed->pfmem = %x\n", amount_needed
->pfmem
);
808 if (amount_needed
->not_correct
) {
809 debug ("amount_needed is not correct\n");
810 for (count
= 0; address
[count
]; count
++) {
813 ibmphp_remove_resource (bus_io
[count
]);
814 func
->io
[count
] = NULL
;
815 } else if (bus_pfmem
[count
]) {
816 ibmphp_remove_resource (bus_pfmem
[count
]);
817 func
->pfmem
[count
] = NULL
;
818 } else if (bus_mem
[count
]) {
819 ibmphp_remove_resource (bus_mem
[count
]);
820 func
->mem
[count
] = NULL
;
823 kfree (amount_needed
);
827 if (!amount_needed
->io
) {
828 debug ("it doesn't want IO?\n");
831 debug ("it wants %x IO behind the bridge\n", amount_needed
->io
);
832 io
= kzalloc(sizeof(*io
), GFP_KERNEL
);
835 err ("out of system memory\n");
840 io
->busno
= func
->busno
;
841 io
->devfunc
= PCI_DEVFN(func
->device
, func
->function
);
842 io
->len
= amount_needed
->io
;
843 if (ibmphp_check_resource (io
, 1) == 0) {
844 debug ("were we able to add io\n");
845 ibmphp_add_resource (io
);
850 if (!amount_needed
->mem
) {
851 debug ("it doesn't want n.e.memory?\n");
854 debug ("it wants %x memory behind the bridge\n", amount_needed
->mem
);
855 mem
= kzalloc(sizeof(*mem
), GFP_KERNEL
);
857 err ("out of system memory\n");
862 mem
->busno
= func
->busno
;
863 mem
->devfunc
= PCI_DEVFN(func
->device
, func
->function
);
864 mem
->len
= amount_needed
->mem
;
865 if (ibmphp_check_resource (mem
, 1) == 0) {
866 ibmphp_add_resource (mem
);
868 debug ("were we able to add mem\n");
872 if (!amount_needed
->pfmem
) {
873 debug ("it doesn't want n.e.pfmem mem?\n");
876 debug ("it wants %x pfmemory behind the bridge\n", amount_needed
->pfmem
);
877 pfmem
= kzalloc(sizeof(*pfmem
), GFP_KERNEL
);
879 err ("out of system memory\n");
884 pfmem
->busno
= func
->busno
;
885 pfmem
->devfunc
= PCI_DEVFN(func
->device
, func
->function
);
886 pfmem
->len
= amount_needed
->pfmem
;
888 if (ibmphp_check_resource (pfmem
, 1) == 0) {
889 ibmphp_add_resource (pfmem
);
892 mem_tmp
= kzalloc(sizeof(*mem_tmp
), GFP_KERNEL
);
894 err ("out of system memory\n");
899 mem_tmp
->busno
= pfmem
->busno
;
900 mem_tmp
->devfunc
= pfmem
->devfunc
;
901 mem_tmp
->len
= pfmem
->len
;
902 if (ibmphp_check_resource (mem_tmp
, 1) == 0) {
903 ibmphp_add_resource (mem_tmp
);
905 pfmem
->rangeno
= mem_tmp
->rangeno
;
906 ibmphp_add_pfmem_from_mem (pfmem
);
912 debug ("b4 if (flag_io && flag_mem && flag_pfmem)\n");
913 debug ("flag_io = %x, flag_mem = %x, flag_pfmem = %x\n", flag_io
, flag_mem
, flag_pfmem
);
915 if (flag_io
&& flag_mem
&& flag_pfmem
) {
916 /* If on bootup, there was a bridged card in this slot,
917 * then card was removed and ibmphp got unloaded and loaded
918 * back again, there's no way for us to remove the bus
919 * struct, so no need to kmalloc, can use existing node
921 bus
= ibmphp_find_res_bus (sec_number
);
923 bus
= kzalloc(sizeof(*bus
), GFP_KERNEL
);
925 err ("out of system memory\n");
929 bus
->busno
= sec_number
;
930 debug ("b4 adding new bus\n");
931 rc
= add_new_bus (bus
, io
, mem
, pfmem
, func
->busno
);
932 } else if (!(bus
->rangeIO
) && !(bus
->rangeMem
) && !(bus
->rangePFMem
))
933 rc
= add_new_bus (bus
, io
, mem
, pfmem
, 0xFF);
935 err ("expected bus structure not empty?\n");
941 ibmphp_remove_bus (bus
, func
->busno
);
942 kfree (amount_needed
);
948 pci_bus_read_config_byte (ibmphp_pci_bus
, devfn
, PCI_IO_BASE
, &io_base
);
949 pci_bus_read_config_word (ibmphp_pci_bus
, devfn
, PCI_PREF_MEMORY_BASE
, &pfmem_base
);
951 if ((io_base
& PCI_IO_RANGE_TYPE_MASK
) == PCI_IO_RANGE_TYPE_32
) {
955 if ((pfmem_base
& PCI_PREF_RANGE_TYPE_MASK
) == PCI_PREF_RANGE_TYPE_64
) {
956 debug ("pfmem 64\n");
957 need_pfmem_upper
= 1;
960 if (bus
->noIORanges
) {
961 pci_bus_write_config_byte (ibmphp_pci_bus
, devfn
, PCI_IO_BASE
, 0x00 | bus
->rangeIO
->start
>> 8);
962 pci_bus_write_config_byte (ibmphp_pci_bus
, devfn
, PCI_IO_LIMIT
, 0x00 | bus
->rangeIO
->end
>> 8);
964 /* _______________This is for debugging purposes only ____________________
965 pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_IO_BASE, &temp);
966 debug ("io_base = %x\n", (temp & PCI_IO_RANGE_TYPE_MASK) << 8);
967 pci_bus_read_config_byte (ibmphp_pci_bus, devfn, PCI_IO_LIMIT, &temp);
968 debug ("io_limit = %x\n", (temp & PCI_IO_RANGE_TYPE_MASK) << 8);
969 ________________________________________________________________________*/
971 if (need_io_upper
) { /* since can't support n.e.ways */
972 pci_bus_write_config_word (ibmphp_pci_bus
, devfn
, PCI_IO_BASE_UPPER16
, 0x0000);
973 pci_bus_write_config_word (ibmphp_pci_bus
, devfn
, PCI_IO_LIMIT_UPPER16
, 0x0000);
976 pci_bus_write_config_byte (ibmphp_pci_bus
, devfn
, PCI_IO_BASE
, 0x00);
977 pci_bus_write_config_byte (ibmphp_pci_bus
, devfn
, PCI_IO_LIMIT
, 0x00);
980 if (bus
->noMemRanges
) {
981 pci_bus_write_config_word (ibmphp_pci_bus
, devfn
, PCI_MEMORY_BASE
, 0x0000 | bus
->rangeMem
->start
>> 16);
982 pci_bus_write_config_word (ibmphp_pci_bus
, devfn
, PCI_MEMORY_LIMIT
, 0x0000 | bus
->rangeMem
->end
>> 16);
984 /* ____________________This is for debugging purposes only ________________________
985 pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_BASE, &temp);
986 debug ("mem_base = %x\n", (temp & PCI_MEMORY_RANGE_TYPE_MASK) << 16);
987 pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_MEMORY_LIMIT, &temp);
988 debug ("mem_limit = %x\n", (temp & PCI_MEMORY_RANGE_TYPE_MASK) << 16);
989 __________________________________________________________________________________*/
992 pci_bus_write_config_word (ibmphp_pci_bus
, devfn
, PCI_MEMORY_BASE
, 0xffff);
993 pci_bus_write_config_word (ibmphp_pci_bus
, devfn
, PCI_MEMORY_LIMIT
, 0x0000);
995 if (bus
->noPFMemRanges
) {
996 pci_bus_write_config_word (ibmphp_pci_bus
, devfn
, PCI_PREF_MEMORY_BASE
, 0x0000 | bus
->rangePFMem
->start
>> 16);
997 pci_bus_write_config_word (ibmphp_pci_bus
, devfn
, PCI_PREF_MEMORY_LIMIT
, 0x0000 | bus
->rangePFMem
->end
>> 16);
999 /* __________________________This is for debugging purposes only _______________________
1000 pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_BASE, &temp);
1001 debug ("pfmem_base = %x", (temp & PCI_MEMORY_RANGE_TYPE_MASK) << 16);
1002 pci_bus_read_config_word (ibmphp_pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, &temp);
1003 debug ("pfmem_limit = %x\n", (temp & PCI_MEMORY_RANGE_TYPE_MASK) << 16);
1004 ______________________________________________________________________________________*/
1006 if (need_pfmem_upper
) { /* since can't support n.e.ways */
1007 pci_bus_write_config_dword (ibmphp_pci_bus
, devfn
, PCI_PREF_BASE_UPPER32
, 0x00000000);
1008 pci_bus_write_config_dword (ibmphp_pci_bus
, devfn
, PCI_PREF_LIMIT_UPPER32
, 0x00000000);
1011 pci_bus_write_config_word (ibmphp_pci_bus
, devfn
, PCI_PREF_MEMORY_BASE
, 0xffff);
1012 pci_bus_write_config_word (ibmphp_pci_bus
, devfn
, PCI_PREF_MEMORY_LIMIT
, 0x0000);
1015 debug ("b4 writing control information\n");
1017 pci_bus_read_config_byte (ibmphp_pci_bus
, devfn
, PCI_INTERRUPT_PIN
, &irq
);
1018 if ((irq
> 0x00) && (irq
< 0x05))
1019 pci_bus_write_config_byte (ibmphp_pci_bus
, devfn
, PCI_INTERRUPT_LINE
, func
->irq
[irq
- 1]);
1021 pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_BRIDGE_CONTROL, ctrl);
1022 pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_BRIDGE_CONTROL, PCI_BRIDGE_CTL_PARITY);
1023 pci_bus_write_config_byte (ibmphp_pci_bus, devfn, PCI_BRIDGE_CONTROL, PCI_BRIDGE_CTL_SERR);
1026 pci_bus_write_config_word (ibmphp_pci_bus
, devfn
, PCI_COMMAND
, DEVICEENABLE
);
1027 pci_bus_write_config_word (ibmphp_pci_bus
, devfn
, PCI_BRIDGE_CONTROL
, 0x07);
1028 for (i
= 0; i
< 32; i
++) {
1029 if (amount_needed
->devices
[i
]) {
1030 debug ("device where devices[i] is 1 = %x\n", i
);
1031 func
->devices
[i
] = 1;
1034 func
->bus
= 1; /* For unconfiguring, to indicate it's PPB */
1035 func_passed
= &func
;
1036 debug ("func->busno b4 returning is %x\n", func
->busno
);
1037 debug ("func->busno b4 returning in the other structure is %x\n", (*func_passed
)->busno
);
1038 kfree (amount_needed
);
1041 err ("Configuring bridge was unsuccessful...\n");
1048 kfree(amount_needed
);
1050 ibmphp_remove_resource (pfmem
);
1052 ibmphp_remove_resource (io
);
1054 ibmphp_remove_resource (mem
);
1055 for (i
= 0; i
< 2; i
++) { /* for 2 BARs */
1057 ibmphp_remove_resource (bus_io
[i
]);
1059 } else if (bus_pfmem
[i
]) {
1060 ibmphp_remove_resource (bus_pfmem
[i
]);
1061 func
->pfmem
[i
] = NULL
;
1062 } else if (bus_mem
[i
]) {
1063 ibmphp_remove_resource (bus_mem
[i
]);
1064 func
->mem
[i
] = NULL
;
1070 /*****************************************************************************
1071 * This function adds up the amount of resources needed behind the PPB bridge
1072 * and passes it to the configure_bridge function
1073 * Input: bridge function
1074 * Output: amount of resources needed
1075 *****************************************************************************/
1076 static struct res_needed
*scan_behind_bridge (struct pci_func
* func
, u8 busno
)
1081 u8 device
, function
;
1083 int howmany
= 0; /*this is to see if there are any devices behind the bridge */
1095 struct res_needed
*amount
;
1097 amount
= kzalloc(sizeof(*amount
), GFP_KERNEL
);
1101 ibmphp_pci_bus
->number
= busno
;
1103 debug ("the bus_no behind the bridge is %x\n", busno
);
1104 debug ("scanning devices behind the bridge...\n");
1105 for (device
= 0; device
< 32; device
++) {
1106 amount
->devices
[device
] = 0;
1107 for (function
= 0; function
< 8; function
++) {
1108 devfn
= PCI_DEVFN(device
, function
);
1110 pci_bus_read_config_word (ibmphp_pci_bus
, devfn
, PCI_VENDOR_ID
, &vendor_id
);
1112 if (vendor_id
!= PCI_VENDOR_ID_NOTVALID
) {
1113 /* found correct device!!! */
1116 pci_bus_read_config_byte (ibmphp_pci_bus
, devfn
, PCI_HEADER_TYPE
, &hdr_type
);
1117 pci_bus_read_config_dword (ibmphp_pci_bus
, devfn
, PCI_CLASS_REVISION
, &class);
1119 debug ("hdr_type behind the bridge is %x\n", hdr_type
);
1120 if (hdr_type
& PCI_HEADER_TYPE_BRIDGE
) {
1121 err ("embedded bridges not supported for hot-plugging.\n");
1122 amount
->not_correct
= 1;
1126 class >>= 8; /* to take revision out, class = class.subclass.prog i/f */
1127 if (class == PCI_CLASS_NOT_DEFINED_VGA
) {
1128 err ("The device %x is VGA compatible and as is not supported for hot plugging. "
1129 "Please choose another device.\n", device
);
1130 amount
->not_correct
= 1;
1132 } else if (class == PCI_CLASS_DISPLAY_VGA
) {
1133 err ("The device %x is not supported for hot plugging. "
1134 "Please choose another device.\n", device
);
1135 amount
->not_correct
= 1;
1139 amount
->devices
[device
] = 1;
1141 for (count
= 0; address
[count
]; count
++) {
1144 pci_bus_read_config_byte (ibmphp_pci_bus, devfn, address[count], &tmp);
1145 if (tmp & 0x01) // IO
1146 pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0xFFFFFFFD);
1148 pci_bus_write_config_dword (ibmphp_pci_bus, devfn, address[count], 0xFFFFFFFF);
1150 pci_bus_write_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], 0xFFFFFFFF);
1151 pci_bus_read_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], &bar
[count
]);
1153 debug ("what is bar[count]? %x, count = %d\n", bar
[count
], count
);
1155 if (!bar
[count
]) /* This BAR is not implemented */
1158 //tmp_bar = bar[count];
1160 debug ("count %d device %x function %x wants %x resources\n", count
, device
, function
, bar
[count
]);
1162 if (bar
[count
] & PCI_BASE_ADDRESS_SPACE_IO
) {
1164 len
[count
] = bar
[count
] & 0xFFFFFFFC;
1165 len
[count
] = ~len
[count
] + 1;
1166 amount
->io
+= len
[count
];
1168 /* This is Memory */
1169 if (bar
[count
] & PCI_BASE_ADDRESS_MEM_PREFETCH
) {
1171 len
[count
] = bar
[count
] & 0xFFFFFFF0;
1172 len
[count
] = ~len
[count
] + 1;
1173 amount
->pfmem
+= len
[count
];
1174 if (bar
[count
] & PCI_BASE_ADDRESS_MEM_TYPE_64
)
1175 /* takes up another dword */
1179 /* regular memory */
1180 len
[count
] = bar
[count
] & 0xFFFFFFF0;
1181 len
[count
] = ~len
[count
] + 1;
1182 amount
->mem
+= len
[count
];
1183 if (bar
[count
] & PCI_BASE_ADDRESS_MEM_TYPE_64
) {
1184 /* takes up another dword */
1190 } /* end if (valid) */
1195 amount
->not_correct
= 1;
1197 amount
->not_correct
= 0;
1198 if ((amount
->io
) && (amount
->io
< IOBRIDGE
))
1199 amount
->io
= IOBRIDGE
;
1200 if ((amount
->mem
) && (amount
->mem
< MEMBRIDGE
))
1201 amount
->mem
= MEMBRIDGE
;
1202 if ((amount
->pfmem
) && (amount
->pfmem
< MEMBRIDGE
))
1203 amount
->pfmem
= MEMBRIDGE
;
1207 /* The following 3 unconfigure_boot_ routines deal with the case when we had the card
1208 * upon bootup in the system, since we don't allocate func to such case, we need to read
1209 * the start addresses from pci config space and then find the corresponding entries in
1210 * our resource lists. The functions return either 0, -ENODEV, or -1 (general failure)
1211 * Change: we also call these functions even if we configured the card ourselves (i.e., not
1212 * the bootup case), since it should work same way
1214 static int unconfigure_boot_device (u8 busno
, u8 device
, u8 function
)
1227 struct resource_node
*io
;
1228 struct resource_node
*mem
;
1229 struct resource_node
*pfmem
;
1230 struct bus_node
*bus
;
1237 debug ("%s - enter\n", __func__
);
1239 bus
= ibmphp_find_res_bus (busno
);
1241 debug ("cannot find corresponding bus.\n");
1245 devfn
= PCI_DEVFN(device
, function
);
1246 ibmphp_pci_bus
->number
= busno
;
1247 for (count
= 0; address
[count
]; count
++) { /* for 6 BARs */
1248 pci_bus_read_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], &start_address
);
1250 /* We can do this here, b/c by that time the device driver of the card has been stopped */
1252 pci_bus_write_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], 0xFFFFFFFF);
1253 pci_bus_read_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], &size
);
1254 pci_bus_write_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], start_address
);
1256 debug ("start_address is %x\n", start_address
);
1257 debug ("busno, device, function %x %x %x\n", busno
, device
, function
);
1259 /* This BAR is not implemented */
1260 debug ("is this bar no implemented?, count = %d\n", count
);
1263 tmp_address
= start_address
;
1264 if (start_address
& PCI_BASE_ADDRESS_SPACE_IO
) {
1266 start_address
&= PCI_BASE_ADDRESS_IO_MASK
;
1267 size
= size
& 0xFFFFFFFC;
1269 end_address
= start_address
+ size
- 1;
1270 if (ibmphp_find_resource (bus
, start_address
, &io
, IO
) < 0) {
1271 err ("cannot find corresponding IO resource to remove\n");
1274 debug ("io->start = %x\n", io
->start
);
1276 start_address
= io
->end
+ 1;
1277 ibmphp_remove_resource (io
);
1278 /* This is needed b/c of the old I/O restrictions in the BIOS */
1279 while (temp_end
< end_address
) {
1280 if (ibmphp_find_resource (bus
, start_address
, &io
, IO
) < 0) {
1281 err ("cannot find corresponding IO resource to remove\n");
1284 debug ("io->start = %x\n", io
->start
);
1286 start_address
= io
->end
+ 1;
1287 ibmphp_remove_resource (io
);
1290 /* ????????? DO WE NEED TO WRITE ANYTHING INTO THE PCI CONFIG SPACE BACK ?????????? */
1292 /* This is Memory */
1293 if (start_address
& PCI_BASE_ADDRESS_MEM_PREFETCH
) {
1295 debug ("start address of pfmem is %x\n", start_address
);
1296 start_address
&= PCI_BASE_ADDRESS_MEM_MASK
;
1298 if (ibmphp_find_resource (bus
, start_address
, &pfmem
, PFMEM
) < 0) {
1299 err ("cannot find corresponding PFMEM resource to remove\n");
1303 debug ("pfmem->start = %x\n", pfmem
->start
);
1305 ibmphp_remove_resource(pfmem
);
1308 /* regular memory */
1309 debug ("start address of mem is %x\n", start_address
);
1310 start_address
&= PCI_BASE_ADDRESS_MEM_MASK
;
1312 if (ibmphp_find_resource (bus
, start_address
, &mem
, MEM
) < 0) {
1313 err ("cannot find corresponding MEM resource to remove\n");
1317 debug ("mem->start = %x\n", mem
->start
);
1319 ibmphp_remove_resource(mem
);
1322 if (tmp_address
& PCI_BASE_ADDRESS_MEM_TYPE_64
) {
1323 /* takes up another dword */
1332 static int unconfigure_boot_bridge (u8 busno
, u8 device
, u8 function
)
1335 int bus_no
, pri_no
, sub_no
, sec_no
= 0;
1336 u32 start_address
, tmp_address
;
1337 u8 sec_number
, sub_number
, pri_number
;
1338 struct resource_node
*io
= NULL
;
1339 struct resource_node
*mem
= NULL
;
1340 struct resource_node
*pfmem
= NULL
;
1341 struct bus_node
*bus
;
1349 devfn
= PCI_DEVFN(device
, function
);
1350 ibmphp_pci_bus
->number
= busno
;
1351 bus_no
= (int) busno
;
1352 debug ("busno is %x\n", busno
);
1353 pci_bus_read_config_byte (ibmphp_pci_bus
, devfn
, PCI_PRIMARY_BUS
, &pri_number
);
1354 debug ("%s - busno = %x, primary_number = %x\n", __func__
, busno
, pri_number
);
1356 pci_bus_read_config_byte (ibmphp_pci_bus
, devfn
, PCI_SECONDARY_BUS
, &sec_number
);
1357 debug ("sec_number is %x\n", sec_number
);
1358 sec_no
= (int) sec_number
;
1359 pri_no
= (int) pri_number
;
1360 if (pri_no
!= bus_no
) {
1361 err ("primary numbers in our structures and pci config space don't match.\n");
1365 pci_bus_read_config_byte (ibmphp_pci_bus
, devfn
, PCI_SUBORDINATE_BUS
, &sub_number
);
1366 sub_no
= (int) sub_number
;
1367 debug ("sub_no is %d, sec_no is %d\n", sub_no
, sec_no
);
1368 if (sec_no
!= sub_number
) {
1369 err ("there're more buses behind this bridge. Hot removal is not supported. Please choose another card\n");
1373 bus
= ibmphp_find_res_bus (sec_number
);
1375 err ("cannot find Bus structure for the bridged device\n");
1378 debug("bus->busno is %x\n", bus
->busno
);
1379 debug("sec_number is %x\n", sec_number
);
1381 ibmphp_remove_bus (bus
, busno
);
1383 for (count
= 0; address
[count
]; count
++) {
1385 pci_bus_read_config_dword (ibmphp_pci_bus
, devfn
, address
[count
], &start_address
);
1387 if (!start_address
) {
1388 /* This BAR is not implemented */
1392 tmp_address
= start_address
;
1394 if (start_address
& PCI_BASE_ADDRESS_SPACE_IO
) {
1396 start_address
&= PCI_BASE_ADDRESS_IO_MASK
;
1397 if (ibmphp_find_resource (bus
, start_address
, &io
, IO
) < 0) {
1398 err ("cannot find corresponding IO resource to remove\n");
1402 debug ("io->start = %x\n", io
->start
);
1404 ibmphp_remove_resource (io
);
1406 /* ????????? DO WE NEED TO WRITE ANYTHING INTO THE PCI CONFIG SPACE BACK ?????????? */
1408 /* This is Memory */
1409 if (start_address
& PCI_BASE_ADDRESS_MEM_PREFETCH
) {
1411 start_address
&= PCI_BASE_ADDRESS_MEM_MASK
;
1412 if (ibmphp_find_resource (bus
, start_address
, &pfmem
, PFMEM
) < 0) {
1413 err ("cannot find corresponding PFMEM resource to remove\n");
1417 debug ("pfmem->start = %x\n", pfmem
->start
);
1419 ibmphp_remove_resource(pfmem
);
1422 /* regular memory */
1423 start_address
&= PCI_BASE_ADDRESS_MEM_MASK
;
1424 if (ibmphp_find_resource (bus
, start_address
, &mem
, MEM
) < 0) {
1425 err ("cannot find corresponding MEM resource to remove\n");
1429 debug ("mem->start = %x\n", mem
->start
);
1431 ibmphp_remove_resource(mem
);
1434 if (tmp_address
& PCI_BASE_ADDRESS_MEM_TYPE_64
) {
1435 /* takes up another dword */
1440 debug ("%s - exiting, returning success\n", __func__
);
1444 static int unconfigure_boot_card (struct slot
*slot_cur
)
1454 u8 valid_device
= 0x00; /* To see if we are ever able to find valid device and read it */
1456 debug ("%s - enter\n", __func__
);
1458 device
= slot_cur
->device
;
1459 busno
= slot_cur
->bus
;
1461 debug ("b4 for loop, device is %x\n", device
);
1462 /* For every function on the card */
1463 for (function
= 0x0; function
< 0x08; function
++) {
1464 devfn
= PCI_DEVFN(device
, function
);
1465 ibmphp_pci_bus
->number
= busno
;
1467 pci_bus_read_config_word (ibmphp_pci_bus
, devfn
, PCI_VENDOR_ID
, &vendor_id
);
1469 if (vendor_id
!= PCI_VENDOR_ID_NOTVALID
) {
1470 /* found correct device!!! */
1473 debug ("%s - found correct device\n", __func__
);
1475 /* header: x x x x x x x x
1476 * | |___________|=> 1=PPB bridge, 0=normal device, 2=CardBus Bridge
1477 * |_=> 0 = single function device, 1 = multi-function device
1480 pci_bus_read_config_byte (ibmphp_pci_bus
, devfn
, PCI_HEADER_TYPE
, &hdr_type
);
1481 pci_bus_read_config_dword (ibmphp_pci_bus
, devfn
, PCI_CLASS_REVISION
, &class);
1483 debug ("hdr_type %x, class %x\n", hdr_type
, class);
1484 class >>= 8; /* to take revision out, class = class.subclass.prog i/f */
1485 if (class == PCI_CLASS_NOT_DEFINED_VGA
) {
1486 err ("The device %x function %x is VGA compatible and is not supported for hot removing. "
1487 "Please choose another device.\n", device
, function
);
1489 } else if (class == PCI_CLASS_DISPLAY_VGA
) {
1490 err ("The device %x function %x is not supported for hot removing. "
1491 "Please choose another device.\n", device
, function
);
1496 case PCI_HEADER_TYPE_NORMAL
:
1497 rc
= unconfigure_boot_device (busno
, device
, function
);
1499 err ("was not able to unconfigure device %x func %x on bus %x. bailing out...\n",
1500 device
, function
, busno
);
1505 case PCI_HEADER_TYPE_MULTIDEVICE
:
1506 rc
= unconfigure_boot_device (busno
, device
, function
);
1508 err ("was not able to unconfigure device %x func %x on bus %x. bailing out...\n",
1509 device
, function
, busno
);
1513 case PCI_HEADER_TYPE_BRIDGE
:
1515 if (class != PCI_CLASS_BRIDGE_PCI
) {
1516 err ("This device %x function %x is not PCI-to-PCI bridge, "
1517 "and is not supported for hot-removing. "
1518 "Please try another card.\n", device
, function
);
1521 rc
= unconfigure_boot_bridge (busno
, device
, function
);
1523 err ("was not able to hot-remove PPB properly.\n");
1529 case PCI_HEADER_TYPE_MULTIBRIDGE
:
1531 if (class != PCI_CLASS_BRIDGE_PCI
) {
1532 err ("This device %x function %x is not PCI-to-PCI bridge, "
1533 "and is not supported for hot-removing. "
1534 "Please try another card.\n", device
, function
);
1537 rc
= unconfigure_boot_bridge (busno
, device
, function
);
1539 err ("was not able to hot-remove PPB properly.\n");
1544 err ("MAJOR PROBLEM!!!! Cannot read device's header\n");
1547 } /* end of switch */
1548 } /* end of valid device */
1551 if (!valid_device
) {
1552 err ("Could not find device to unconfigure. Or could not read the card.\n");
1559 * free the resources of the card (multi, single, or bridged)
1560 * Parameters: slot, flag to say if this is for removing entire module or just
1561 * unconfiguring the device
1562 * TO DO: will probably need to add some code in case there was some resource,
1563 * to remove it... this is from when we have errors in the configure_card...
1564 * !!!!!!!!!!!!!!!!!!!!!!!!!FOR BUSES!!!!!!!!!!!!
1565 * Returns: 0, -1, -ENODEV
1567 int ibmphp_unconfigure_card (struct slot
**slot_cur
, int the_end
)
1572 struct slot
*sl
= *slot_cur
;
1573 struct pci_func
*cur_func
= NULL
;
1574 struct pci_func
*temp_func
;
1576 debug ("%s - enter\n", __func__
);
1579 /* Need to unconfigure the card */
1580 rc
= unconfigure_boot_card (sl
);
1581 if ((rc
== -ENODEV
) || (rc
== -EIO
) || (rc
== -EINVAL
)) {
1582 /* In all other cases, will still need to get rid of func structure if it exists */
1588 cur_func
= sl
->func
;
1590 /* TO DO: WILL MOST LIKELY NEED TO GET RID OF THE BUS STRUCTURE FROM RESOURCES AS WELL */
1591 if (cur_func
->bus
) {
1592 /* in other words, it's a PPB */
1598 for (i
= 0; i
< count
; i
++) {
1599 if (cur_func
->io
[i
]) {
1600 debug ("io[%d] exists\n", i
);
1602 ibmphp_remove_resource (cur_func
->io
[i
]);
1603 cur_func
->io
[i
] = NULL
;
1605 if (cur_func
->mem
[i
]) {
1606 debug ("mem[%d] exists\n", i
);
1608 ibmphp_remove_resource (cur_func
->mem
[i
]);
1609 cur_func
->mem
[i
] = NULL
;
1611 if (cur_func
->pfmem
[i
]) {
1612 debug ("pfmem[%d] exists\n", i
);
1614 ibmphp_remove_resource (cur_func
->pfmem
[i
]);
1615 cur_func
->pfmem
[i
] = NULL
;
1619 temp_func
= cur_func
->next
;
1621 cur_func
= temp_func
;
1627 debug ("%s - exit\n", __func__
);
1632 * add a new bus resulting from hot-plugging a PPB bridge with devices
1634 * Input: bus and the amount of resources needed (we know we can assign those,
1635 * since they've been checked already
1636 * Output: bus added to the correct spot
1639 static int add_new_bus (struct bus_node
*bus
, struct resource_node
*io
, struct resource_node
*mem
, struct resource_node
*pfmem
, u8 parent_busno
)
1641 struct range_node
*io_range
= NULL
;
1642 struct range_node
*mem_range
= NULL
;
1643 struct range_node
*pfmem_range
= NULL
;
1644 struct bus_node
*cur_bus
= NULL
;
1646 /* Trying to find the parent bus number */
1647 if (parent_busno
!= 0xFF) {
1648 cur_bus
= ibmphp_find_res_bus (parent_busno
);
1650 err ("strange, cannot find bus which is supposed to be at the system... something is terribly wrong...\n");
1654 list_add (&bus
->bus_list
, &cur_bus
->bus_list
);
1657 io_range
= kzalloc(sizeof(*io_range
), GFP_KERNEL
);
1659 err ("out of system memory\n");
1662 io_range
->start
= io
->start
;
1663 io_range
->end
= io
->end
;
1664 io_range
->rangeno
= 1;
1665 bus
->noIORanges
= 1;
1666 bus
->rangeIO
= io_range
;
1669 mem_range
= kzalloc(sizeof(*mem_range
), GFP_KERNEL
);
1671 err ("out of system memory\n");
1674 mem_range
->start
= mem
->start
;
1675 mem_range
->end
= mem
->end
;
1676 mem_range
->rangeno
= 1;
1677 bus
->noMemRanges
= 1;
1678 bus
->rangeMem
= mem_range
;
1681 pfmem_range
= kzalloc(sizeof(*pfmem_range
), GFP_KERNEL
);
1683 err ("out of system memory\n");
1686 pfmem_range
->start
= pfmem
->start
;
1687 pfmem_range
->end
= pfmem
->end
;
1688 pfmem_range
->rangeno
= 1;
1689 bus
->noPFMemRanges
= 1;
1690 bus
->rangePFMem
= pfmem_range
;
1696 * find the 1st available bus number for PPB to set as its secondary bus
1697 * Parameters: bus_number of the primary bus
1698 * Returns: bus_number of the secondary bus or 0xff in case of failure
1700 static u8
find_sec_number (u8 primary_busno
, u8 slotno
)
1704 struct bus_info
*bus
;
1705 struct bus_node
*bus_cur
;
1707 bus
= ibmphp_find_same_bus_num (primary_busno
);
1709 err ("cannot get slot range of the bus from the BIOS\n");
1712 max
= bus
->slot_max
;
1713 min
= bus
->slot_min
;
1714 if ((slotno
> max
) || (slotno
< min
)) {
1715 err ("got the wrong range\n");
1718 busno
= (u8
) (slotno
- (u8
) min
);
1719 busno
+= primary_busno
+ 0x01;
1720 bus_cur
= ibmphp_find_res_bus (busno
);
1721 /* either there is no such bus number, or there are no ranges, which
1722 * can only happen if we removed the bridged device in previous load
1723 * of the driver, and now only have the skeleton bus struct
1725 if ((!bus_cur
) || (!(bus_cur
->rangeIO
) && !(bus_cur
->rangeMem
) && !(bus_cur
->rangePFMem
)))