Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 449 insertions, 0 deletions

diff --git a/drivers/pci/hotplug/acpiphp_pci.c b/drivers/pci/hotplug/acpiphp_pci.c
new file mode 100644
index 00000000000..54d97c9d1df
--- /dev/null
+++ b/drivers/pci/hotplug/acpiphp_pci.c
@@ -0,0 +1,449 @@
+/*
+ * ACPI PCI HotPlug PCI configuration space management
+ *
+ * Copyright (C) 1995,2001 Compaq Computer Corporation
+ * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
+ * Copyright (C) 2001,2002 IBM Corp.
+ * Copyright (C) 2002 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
+ * Copyright (C) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
+ * Copyright (C) 2002 NEC Corporation
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Send feedback to <t-kochi@bq.jp.nec.com>
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/acpi.h>
+#include "../pci.h"
+#include "pci_hotplug.h"
+#include "acpiphp.h"
+
+#define MY_NAME "acpiphp_pci"
+
+
+/* allocate mem/pmem/io resource to a new function */
+static int init_config_space (struct acpiphp_func *func)
+{
+	u32 bar, len;
+	u32 address[] = {
+		PCI_BASE_ADDRESS_0,
+		PCI_BASE_ADDRESS_1,
+		PCI_BASE_ADDRESS_2,
+		PCI_BASE_ADDRESS_3,
+		PCI_BASE_ADDRESS_4,
+		PCI_BASE_ADDRESS_5,
+		0
+	};
+	int count;
+	struct acpiphp_bridge *bridge;
+	struct pci_resource *res;
+	struct pci_bus *pbus;
+	int bus, device, function;
+	unsigned int devfn;
+	u16 tmp;
+
+	bridge = func->slot->bridge;
+	pbus = bridge->pci_bus;
+	bus = bridge->bus;
+	device = func->slot->device;
+	function = func->function;
+	devfn = PCI_DEVFN(device, function);
+
+	for (count = 0; address[count]; count++) {	/* for 6 BARs */
+		pci_bus_write_config_dword(pbus, devfn,
+					   address[count], 0xFFFFFFFF);
+		pci_bus_read_config_dword(pbus, devfn, address[count], &bar);
+
+		if (!bar)	/* This BAR is not implemented */
+			continue;
+
+		dbg("Device %02x.%02x BAR %d wants %x\n", device, function, count, bar);
+
+		if (bar & PCI_BASE_ADDRESS_SPACE_IO) {
+			/* This is IO */
+
+			len = bar & (PCI_BASE_ADDRESS_IO_MASK & 0xFFFF);
+			len = len & ~(len - 1);
+
+			dbg("len in IO %x, BAR %d\n", len, count);
+
+			spin_lock(&bridge->res_lock);
+			res = acpiphp_get_io_resource(&bridge->io_head, len);
+			spin_unlock(&bridge->res_lock);
+
+			if (!res) {
+				err("cannot allocate requested io for %02x:%02x.%d len %x\n",
+				    bus, device, function, len);
+				return -1;
+			}
+			pci_bus_write_config_dword(pbus, devfn,
+						   address[count],
+						   (u32)res->base);
+			res->next = func->io_head;
+			func->io_head = res;
+
+		} else {
+			/* This is Memory */
+			if (bar & PCI_BASE_ADDRESS_MEM_PREFETCH) {
+				/* pfmem */
+
+				len = bar & 0xFFFFFFF0;
+				len = ~len + 1;
+
+				dbg("len in PFMEM %x, BAR %d\n", len, count);
+
+				spin_lock(&bridge->res_lock);
+				res = acpiphp_get_resource(&bridge->p_mem_head, len);
+				spin_unlock(&bridge->res_lock);
+
+				if (!res) {
+					err("cannot allocate requested pfmem for %02x:%02x.%d len %x\n",
+					    bus, device, function, len);
+					return -1;
+				}
+
+				pci_bus_write_config_dword(pbus, devfn,
+							   address[count],
+							   (u32)res->base);
+
+				if (bar & PCI_BASE_ADDRESS_MEM_TYPE_64) {	/* takes up another dword */
+					dbg("inside the pfmem 64 case, count %d\n", count);
+					count += 1;
+					pci_bus_write_config_dword(pbus, devfn,
+								   address[count],
+								   (u32)(res->base >> 32));
+				}
+
+				res->next = func->p_mem_head;
+				func->p_mem_head = res;
+
+			} else {
+				/* regular memory */
+
+				len = bar & 0xFFFFFFF0;
+				len = ~len + 1;
+
+				dbg("len in MEM %x, BAR %d\n", len, count);
+
+				spin_lock(&bridge->res_lock);
+				res = acpiphp_get_resource(&bridge->mem_head, len);
+				spin_unlock(&bridge->res_lock);
+
+				if (!res) {
+					err("cannot allocate requested pfmem for %02x:%02x.%d len %x\n",
+					    bus, device, function, len);
+					return -1;
+				}
+
+				pci_bus_write_config_dword(pbus, devfn,
+							   address[count],
+							   (u32)res->base);
+
+				if (bar & PCI_BASE_ADDRESS_MEM_TYPE_64) {
+					/* takes up another dword */
+					dbg("inside mem 64 case, reg. mem, count %d\n", count);
+					count += 1;
+					pci_bus_write_config_dword(pbus, devfn,
+								   address[count],
+								   (u32)(res->base >> 32));
+				}
+
+				res->next = func->mem_head;
+				func->mem_head = res;
+
+			}
+		}
+	}
+
+	/* disable expansion rom */
+	pci_bus_write_config_dword(pbus, devfn, PCI_ROM_ADDRESS, 0x00000000);
+
+	/* set PCI parameters from _HPP */
+	pci_bus_write_config_byte(pbus, devfn, PCI_CACHE_LINE_SIZE,
+				  bridge->hpp.cache_line_size);
+	pci_bus_write_config_byte(pbus, devfn, PCI_LATENCY_TIMER,
+				  bridge->hpp.latency_timer);
+
+	pci_bus_read_config_word(pbus, devfn, PCI_COMMAND, &tmp);
+	if (bridge->hpp.enable_SERR)
+		tmp |= PCI_COMMAND_SERR;
+	if (bridge->hpp.enable_PERR)
+		tmp |= PCI_COMMAND_PARITY;
+	pci_bus_write_config_word(pbus, devfn, PCI_COMMAND, tmp);
+
+	return 0;
+}
+
+/* detect_used_resource - subtract resource under dev from bridge */
+static int detect_used_resource (struct acpiphp_bridge *bridge, struct pci_dev *dev)
+{
+	int count;
+
+	dbg("Device %s\n", pci_name(dev));
+
+	for (count = 0; count < DEVICE_COUNT_RESOURCE; count++) {
+		struct pci_resource *res;
+		struct pci_resource **head;
+		unsigned long base = dev->resource[count].start;
+		unsigned long len = dev->resource[count].end - base + 1;
+		unsigned long flags = dev->resource[count].flags;
+
+		if (!flags)
+			continue;
+
+		dbg("BAR[%d] 0x%lx - 0x%lx (0x%lx)\n", count, base,
+				base + len - 1, flags);
+
+		if (flags & IORESOURCE_IO) {
+			head = &bridge->io_head;
+		} else if (flags & IORESOURCE_PREFETCH) {
+			head = &bridge->p_mem_head;
+		} else {
+			head = &bridge->mem_head;
+		}
+
+		spin_lock(&bridge->res_lock);
+		res = acpiphp_get_resource_with_base(head, base, len);
+		spin_unlock(&bridge->res_lock);
+		if (res)
+			kfree(res);
+	}
+
+	return 0;
+}
+
+
+/**
+ * acpiphp_detect_pci_resource - detect resources under bridge
+ * @bridge: detect all resources already used under this bridge
+ *
+ * collect all resources already allocated for all devices under a bridge.
+ */
+int acpiphp_detect_pci_resource (struct acpiphp_bridge *bridge)
+{
+	struct list_head *l;
+	struct pci_dev *dev;
+
+	list_for_each (l, &bridge->pci_bus->devices) {
+		dev = pci_dev_b(l);
+		detect_used_resource(bridge, dev);
+	}
+
+	return 0;
+}
+
+
+/**
+ * acpiphp_init_slot_resource - gather resource usage information of a slot
+ * @slot: ACPI slot object to be checked, should have valid pci_dev member
+ *
+ * TBD: PCI-to-PCI bridge case
+ *      use pci_dev->resource[]
+ */
+int acpiphp_init_func_resource (struct acpiphp_func *func)
+{
+	u64 base;
+	u32 bar, len;
+	u32 address[] = {
+		PCI_BASE_ADDRESS_0,
+		PCI_BASE_ADDRESS_1,
+		PCI_BASE_ADDRESS_2,
+		PCI_BASE_ADDRESS_3,
+		PCI_BASE_ADDRESS_4,
+		PCI_BASE_ADDRESS_5,
+		0
+	};
+	int count;
+	struct pci_resource *res;
+	struct pci_dev *dev;
+
+	dev = func->pci_dev;
+	dbg("Hot-pluggable device %s\n", pci_name(dev));
+
+	for (count = 0; address[count]; count++) {	/* for 6 BARs */
+		pci_read_config_dword(dev, address[count], &bar);
+
+		if (!bar)	/* This BAR is not implemented */
+			continue;
+
+		pci_write_config_dword(dev, address[count], 0xFFFFFFFF);
+		pci_read_config_dword(dev, address[count], &len);
+
+		if (len & PCI_BASE_ADDRESS_SPACE_IO) {
+			/* This is IO */
+			base = bar & 0xFFFFFFFC;
+			len = len & (PCI_BASE_ADDRESS_IO_MASK & 0xFFFF);
+			len = len & ~(len - 1);
+
+			dbg("BAR[%d] %08x - %08x (IO)\n", count, (u32)base, (u32)base + len - 1);
+
+			res = acpiphp_make_resource(base, len);
+			if (!res)
+				goto no_memory;
+
+			res->next = func->io_head;
+			func->io_head = res;
+
+		} else {
+			/* This is Memory */
+			base = bar & 0xFFFFFFF0;
+			if (len & PCI_BASE_ADDRESS_MEM_PREFETCH) {
+				/* pfmem */
+
+				len &= 0xFFFFFFF0;
+				len = ~len + 1;
+
+				if (len & PCI_BASE_ADDRESS_MEM_TYPE_64) {	/* takes up another dword */
+					dbg("prefetch mem 64\n");
+					count += 1;
+				}
+				dbg("BAR[%d] %08x - %08x (PMEM)\n", count, (u32)base, (u32)base + len - 1);
+				res = acpiphp_make_resource(base, len);
+				if (!res)
+					goto no_memory;
+
+				res->next = func->p_mem_head;
+				func->p_mem_head = res;
+
+			} else {
+				/* regular memory */
+
+				len &= 0xFFFFFFF0;
+				len = ~len + 1;
+
+				if (len & PCI_BASE_ADDRESS_MEM_TYPE_64) {
+					/* takes up another dword */
+					dbg("mem 64\n");
+					count += 1;
+				}
+				dbg("BAR[%d] %08x - %08x (MEM)\n", count, (u32)base, (u32)base + len - 1);
+				res = acpiphp_make_resource(base, len);
+				if (!res)
+					goto no_memory;
+
+				res->next = func->mem_head;
+				func->mem_head = res;
+
+			}
+		}
+
+		pci_write_config_dword(dev, address[count], bar);
+	}
+#if 1
+	acpiphp_dump_func_resource(func);
+#endif
+
+	return 0;
+
+ no_memory:
+	err("out of memory\n");
+	acpiphp_free_resource(&func->io_head);
+	acpiphp_free_resource(&func->mem_head);
+	acpiphp_free_resource(&func->p_mem_head);
+
+	return -1;
+}
+
+
+/**
+ * acpiphp_configure_slot - allocate PCI resources
+ * @slot: slot to be configured
+ *
+ * initializes a PCI functions on a device inserted
+ * into the slot
+ *
+ */
+int acpiphp_configure_slot (struct acpiphp_slot *slot)
+{
+	struct acpiphp_func *func;
+	struct list_head *l;
+	u8 hdr;
+	u32 dvid;
+	int retval = 0;
+	int is_multi = 0;
+
+	pci_bus_read_config_byte(slot->bridge->pci_bus,
+				 PCI_DEVFN(slot->device, 0),
+				 PCI_HEADER_TYPE, &hdr);
+
+	if (hdr & 0x80)
+		is_multi = 1;
+
+	list_for_each (l, &slot->funcs) {
+		func = list_entry(l, struct acpiphp_func, sibling);
+		if (is_multi || func->function == 0) {
+			pci_bus_read_config_dword(slot->bridge->pci_bus,
+						  PCI_DEVFN(slot->device,
+							    func->function),
+						  PCI_VENDOR_ID, &dvid);
+			if (dvid != 0xffffffff) {
+				retval = init_config_space(func);
+				if (retval)
+					break;
+			}
+		}
+	}
+
+	return retval;
+}
+
+/**
+ * acpiphp_configure_function - configure PCI function
+ * @func: function to be configured
+ *
+ * initializes a PCI functions on a device inserted
+ * into the slot
+ *
+ */
+int acpiphp_configure_function (struct acpiphp_func *func)
+{
+	/* all handled by the pci core now */
+	return 0;
+}
+
+/**
+ * acpiphp_unconfigure_function - unconfigure PCI function
+ * @func: function to be unconfigured
+ *
+ */
+void acpiphp_unconfigure_function (struct acpiphp_func *func)
+{
+	struct acpiphp_bridge *bridge;
+
+	/* if pci_dev is NULL, ignore it */
+	if (!func->pci_dev)
+		return;
+
+	pci_remove_bus_device(func->pci_dev);
+
+	/* free all resources */
+	bridge = func->slot->bridge;
+
+	spin_lock(&bridge->res_lock);
+	acpiphp_move_resource(&func->io_head, &bridge->io_head);
+	acpiphp_move_resource(&func->mem_head, &bridge->mem_head);
+	acpiphp_move_resource(&func->p_mem_head, &bridge->p_mem_head);
+	acpiphp_move_resource(&func->bus_head, &bridge->bus_head);
+	spin_unlock(&bridge->res_lock);
+}