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SubjectRe: [BK PATCH] PCI Hotplug changes for 2.4.20-pre7
# This is a BitKeeper generated patch for the following project:
# Project Name: Linux kernel tree
# This patch format is intended for GNU patch command version 2.5 or higher.
# This patch includes the following deltas:
# ChangeSet 1.662 -> 1.663
# drivers/hotplug/ibmphp_hpc.c 1.4 -> 1.5
# drivers/hotplug/ibmphp_ebda.c 1.4 -> 1.5
# drivers/hotplug/ibmphp.h 1.3 -> 1.4
# drivers/hotplug/ibmphp_core.c 1.4 -> 1.5
#
# The following is the BitKeeper ChangeSet Log
# --------------------------------------------
# 02/09/13 zubarev@us.ibm.com 1.663
# [PATCH] IBM PCI Hotplug driver update for PCI based controllers
#
# --------------------------------------------
#
diff -Nru a/drivers/hotplug/ibmphp.h b/drivers/hotplug/ibmphp.h
--- a/drivers/hotplug/ibmphp.h Fri Sep 13 10:57:21 2002
+++ b/drivers/hotplug/ibmphp.h Fri Sep 13 10:57:21 2002
@@ -737,6 +737,7 @@
struct controller {
struct ebda_hpc_slot *slots;
struct ebda_hpc_bus *buses;
+ struct pci_dev *ctrl_dev; /* in case where controller is PCI */
u8 starting_slot_num; /* starting and ending slot #'s this ctrl controls*/
u8 ending_slot_num;
u8 revision;
diff -Nru a/drivers/hotplug/ibmphp_core.c b/drivers/hotplug/ibmphp_core.c
--- a/drivers/hotplug/ibmphp_core.c Fri Sep 13 10:57:21 2002
+++ b/drivers/hotplug/ibmphp_core.c Fri Sep 13 10:57:21 2002
@@ -1644,6 +1644,11 @@

max_slots = get_max_slots ();

+ if ((rc = ibmphp_register_pci ())) {
+ ibmphp_unload ();
+ return rc;
+ }
+
if (init_ops ()) {
ibmphp_unload ();
return -ENODEV;
diff -Nru a/drivers/hotplug/ibmphp_ebda.c b/drivers/hotplug/ibmphp_ebda.c
--- a/drivers/hotplug/ibmphp_ebda.c Fri Sep 13 10:57:21 2002
+++ b/drivers/hotplug/ibmphp_ebda.c Fri Sep 13 10:57:21 2002
@@ -130,6 +130,7 @@
controller->slots = NULL;
kfree (controller->buses);
controller->buses = NULL;
+ controller->ctrl_dev = NULL;
kfree (controller);
}

@@ -797,6 +798,8 @@
return NULL;
}

+static struct pci_driver ibmphp_driver;
+
/*
* map info (ctlr-id, slot count, slot#.. bus count, bus#, ctlr type...) of
* each hpc from physical address to a list of hot plug controllers based on
@@ -928,6 +931,7 @@
hpc_ptr->u.pci_ctlr.dev_fun = readb (io_mem + addr + 1);
hpc_ptr->irq = readb (io_mem + addr + 2);
addr += 3;
+ debug ("ctrl bus = %x, ctlr devfun = %x, irq = %x\n", hpc_ptr->u.pci_ctlr.bus, hpc_ptr->u.pci_ctlr.dev_fun, hpc_ptr->irq);
break;

case 0:
@@ -953,12 +957,6 @@
return -ENODEV;
}

- /* following 3 line: Now our driver only supports I2c/ISA ctlrType */
- if ((hpc_ptr->ctlr_type != 2) && (hpc_ptr->ctlr_type != 4) && (hpc_ptr->ctlr_type != 0)) {
- err ("Please run this driver on IBM xSeries440 or xSeries 235\n ");
- return -ENODEV;
- }
-
//reorganize chassis' linked list
combine_wpg_for_chassis ();
combine_wpg_for_expansion ();
@@ -1212,11 +1210,16 @@
struct controller *controller = NULL;
struct list_head *list;
struct list_head *next;
+ int pci_flag = 0;

list_for_each_safe (list, next, &ebda_hpc_head) {
controller = list_entry (list, struct controller, ebda_hpc_list);
if (controller->ctlr_type == 0)
release_region (controller->u.isa_ctlr.io_start, (controller->u.isa_ctlr.io_end - controller->u.isa_ctlr.io_start + 1));
+ else if ((controller->ctlr_type == 1) && (!pci_flag)) {
+ ++pci_flag;
+ pci_unregister_driver (&ibmphp_driver);
+ }
free_ebda_hpc (controller);
}
}
@@ -1233,3 +1236,59 @@
resource = NULL;
}
}
+
+static struct pci_device_id id_table[] __devinitdata = {
+ {
+ vendor: PCI_VENDOR_ID_IBM,
+ device: HPC_DEVICE_ID,
+ subvendor: PCI_VENDOR_ID_IBM,
+ subdevice: HPC_SUBSYSTEM_ID,
+ class: ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
+ }, {}
+};
+
+MODULE_DEVICE_TABLE(pci, id_table);
+
+static int ibmphp_probe (struct pci_dev *, const struct pci_device_id *);
+static struct pci_driver ibmphp_driver = {
+ name: "ibmphp",
+ id_table: id_table,
+ probe: ibmphp_probe,
+};
+
+int ibmphp_register_pci (void)
+{
+ struct controller *ctrl;
+ struct list_head *tmp;
+ int rc = 0;
+
+ list_for_each (tmp, &ebda_hpc_head) {
+ ctrl = list_entry (tmp, struct controller, ebda_hpc_list);
+ if (ctrl->ctlr_type == 1) {
+ rc = pci_module_init (&ibmphp_driver);
+ break;
+ }
+ }
+ return rc;
+}
+static int ibmphp_probe (struct pci_dev * dev, const struct pci_device_id *ids)
+{
+ struct controller *ctrl;
+ struct list_head *tmp;
+
+ debug ("inside ibmphp_probe \n");
+
+ list_for_each (tmp, &ebda_hpc_head) {
+ ctrl = list_entry (tmp, struct controller, ebda_hpc_list);
+ if (ctrl->ctlr_type == 1) {
+ if ((dev->devfn == ctrl->u.pci_ctlr.dev_fun) && (dev->bus->number == ctrl->u.pci_ctlr.bus)) {
+ ctrl->ctrl_dev = dev;
+ debug ("found device!!! \n");
+ debug ("dev->device = %x, dev->subsystem_device = %x\n", dev->device, dev->subsystem_device);
+ return 0;
+ }
+ }
+ }
+ return -ENODEV;
+}
+
diff -Nru a/drivers/hotplug/ibmphp_hpc.c b/drivers/hotplug/ibmphp_hpc.c
--- a/drivers/hotplug/ibmphp_hpc.c Fri Sep 13 10:57:21 2002
+++ b/drivers/hotplug/ibmphp_hpc.c Fri Sep 13 10:57:21 2002
@@ -378,6 +378,26 @@
outb (data, port_address);
}

+static u8 pci_ctrl_read (struct controller *ctrl, u8 offset)
+{
+ u8 data = 0x00;
+ debug ("inside pci_ctrl_read\n");
+ if (ctrl->ctrl_dev)
+ pci_read_config_byte (ctrl->ctrl_dev, HPC_PCI_OFFSET + offset, &data);
+ return data;
+}
+
+static u8 pci_ctrl_write (struct controller *ctrl, u8 offset, u8 data)
+{
+ u8 rc = -ENODEV;
+ debug ("inside pci_ctrl_write\n");
+ if (ctrl->ctrl_dev) {
+ pci_write_config_byte (ctrl->ctrl_dev, HPC_PCI_OFFSET + offset, data);
+ rc = 0;
+ }
+ return rc;
+}
+
static u8 ctrl_read (struct controller *ctlr, void *base, u8 offset)
{
u8 rc;
@@ -385,6 +405,9 @@
case 0:
rc = isa_ctrl_read (ctlr, offset);
break;
+ case 1:
+ rc = pci_ctrl_read (ctlr, offset);
+ break;
case 2:
case 4:
rc = i2c_ctrl_read (ctlr, base, offset);
@@ -401,6 +424,9 @@
switch (ctlr->ctlr_type) {
case 0:
isa_ctrl_write(ctlr, offset, data);
+ break;
+ case 1:
+ rc = pci_ctrl_write (ctlr, offset, data);
break;
case 2:
case 4:
-
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