patch-2.4.27 linux-2.4.27/drivers/hotplug/shpchprm_legacy.c

• Lines: 445
• Date: 2004-08-07 16:26:04.777351832 -0700
• Orig file: linux-2.4.26/drivers/hotplug/shpchprm_legacy.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.26/drivers/hotplug/shpchprm_legacy.c linux-2.4.27/drivers/hotplug/shpchprm_legacy.c
@@ -0,0 +1,444 @@
+/*
+ * SHPCHPRM Legacy: PHP Resource Manager for Non-ACPI/Legacy platform
+ *
+ * Copyright (C) 1995,2001 Compaq Computer Corporation
+ * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
+ * Copyright (C) 2001 IBM Corp.
+ * Copyright (C) 2003-2004 Intel 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 <greg@kroah.com>, <dely.l.sy@intel.com>
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#ifdef CONFIG_IA64
+#include <asm/iosapic.h>
+#endif
+#include "shpchp.h"
+#include "shpchprm.h"
+#include "shpchprm_legacy.h"
+
+static void *shpchp_rom_start;
+static u16 unused_IRQ;
+
+void shpchprm_cleanup()
+{
+	if (shpchp_rom_start)
+		iounmap(shpchp_rom_start);
+}
+
+
+int shpchprm_print_pirt()
+{
+	return 0;
+}
+
+void * shpchprm_get_slot(struct slot *slot)
+{
+	return NULL;
+}
+
+int shpchprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busnum, u8 devnum)
+{
+	int	offset = devnum - ctrl->slot_device_offset;
+
+	*sun = (u8) (ctrl->first_slot + ctrl->slot_num_inc * offset);
+	return 0;
+}
+
+/* find the Hot Plug Resource Table in the specified region of memory */
+static void *detect_HRT_floating_pointer(void *begin, void *end)
+{
+	void *fp;
+	void *endp;
+	u8 temp1, temp2, temp3, temp4;
+	int status = 0;
+
+	endp = (end - sizeof(struct hrt) + 1);
+
+	for (fp = begin; fp <= endp; fp += 16) {
+		temp1 = readb(fp + SIG0);
+		temp2 = readb(fp + SIG1);
+		temp3 = readb(fp + SIG2);
+		temp4 = readb(fp + SIG3);
+		if (temp1 == '$' && temp2 == 'H' && temp3 == 'R' && temp4 == 'T') {
+			status = 1;
+			break;
+		}
+	}
+
+	if (!status)
+		fp = NULL;
+
+	dbg("Discovered Hotplug Resource Table at %p\n", fp);
+	return fp;
+}
+
+/*
+ * shpchprm_find_available_resources
+ *
+ *  Finds available memory, IO, and IRQ resources for programming
+ *  devices which may be added to the system
+ *  this function is for hot plug ADD!
+ *
+ * returns 0 if success
+ */
+int shpchprm_find_available_resources(struct controller *ctrl)
+{
+	u8 populated_slot;
+	u8 bridged_slot;
+	void *one_slot;
+	struct pci_func *func = NULL;
+	int i = 10, index = 0;
+	u32 temp_dword, rc;
+	ulong temp_ulong;
+	struct pci_resource *mem_node;
+	struct pci_resource *p_mem_node;
+	struct pci_resource *io_node;
+	struct pci_resource *bus_node;
+	void *rom_resource_table;
+	struct pci_bus lpci_bus, *pci_bus;
+	u8 cfgspc_irq, temp;
+
+	memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
+	pci_bus = &lpci_bus;
+	rom_resource_table = detect_HRT_floating_pointer(shpchp_rom_start, shpchp_rom_start + 0xffff);
+	dbg("rom_resource_table = %p\n", rom_resource_table);
+	if (rom_resource_table == NULL)
+		return -ENODEV;
+
+	/* Sum all resources and setup resource maps */
+	unused_IRQ = readl(rom_resource_table + UNUSED_IRQ);
+	dbg("unused_IRQ = %x\n", unused_IRQ);
+
+	temp = 0;
+	while (unused_IRQ) {
+		if (unused_IRQ & 1) {
+			shpchp_disk_irq = temp;
+			break;
+		}
+		unused_IRQ = unused_IRQ >> 1;
+		temp++;
+	}
+
+	dbg("shpchp_disk_irq= %d\n", shpchp_disk_irq);
+	unused_IRQ = unused_IRQ >> 1;
+	temp++;
+
+	while (unused_IRQ) {
+		if (unused_IRQ & 1) {
+			shpchp_nic_irq = temp;
+			break;
+		}
+		unused_IRQ = unused_IRQ >> 1;
+		temp++;
+	}
+
+	dbg("shpchp_nic_irq= %d\n", shpchp_nic_irq);
+	unused_IRQ = readl(rom_resource_table + PCIIRQ);
+
+	temp = 0;
+
+	pci_read_config_byte(ctrl->pci_dev, PCI_INTERRUPT_LINE, &cfgspc_irq);
+
+	if (!shpchp_nic_irq) {
+		shpchp_nic_irq = cfgspc_irq;
+	}
+
+	if (!shpchp_disk_irq) {
+		shpchp_disk_irq = cfgspc_irq;
+	}
+
+	dbg("shpchp_disk_irq, shpchp_nic_irq= %d, %d\n", shpchp_disk_irq, shpchp_nic_irq);
+
+	one_slot = rom_resource_table + sizeof(struct hrt);
+
+	i = readb(rom_resource_table + NUMBER_OF_ENTRIES);
+	dbg("number_of_entries = %d\n", i);
+
+	if (!readb(one_slot + SECONDARY_BUS))
+		return (1);
+
+	dbg("dev|IO base|length|MEMbase|length|PM base|length|PB SB MB\n");
+
+	while (i && readb(one_slot + SECONDARY_BUS)) {
+		u8 dev_func = readb(one_slot + DEV_FUNC);
+		u8 primary_bus = readb(one_slot + PRIMARY_BUS);
+		u8 secondary_bus = readb(one_slot + SECONDARY_BUS);
+		u8 max_bus = readb(one_slot + MAX_BUS);
+		u16 io_base = readw(one_slot + IO_BASE);
+		u16 io_length = readw(one_slot + IO_LENGTH);
+		u16 mem_base = readw(one_slot + MEM_BASE);
+		u16 mem_length = readw(one_slot + MEM_LENGTH);
+		u16 pre_mem_base = readw(one_slot + PRE_MEM_BASE);
+		u16 pre_mem_length = readw(one_slot + PRE_MEM_LENGTH);
+
+		dbg("%2.2x |  %4.4x | %4.4x |  %4.4x | %4.4x |  %4.4x | %4.4x |%2.2x %2.2x %2.2x\n",
+				dev_func, io_base, io_length, mem_base, mem_length, pre_mem_base, pre_mem_length,
+				primary_bus, secondary_bus, max_bus);
+
+		/* If this entry isn't for our controller's bus, ignore it */
+		if (primary_bus != ctrl->slot_bus) {
+			i--;
+			one_slot += sizeof(struct slot_rt);
+			continue;
+		}
+		/* Find out if this entry is for an occupied slot */
+		temp_dword = 0xFFFFFFFF;
+		pci_bus->number = primary_bus;
+		pci_bus_read_config_dword(pci_bus, dev_func, PCI_VENDOR_ID, &temp_dword);
+
+		dbg("temp_D_word = %x\n", temp_dword);
+
+		if (temp_dword != 0xFFFFFFFF) {
+			index = 0;
+			func = shpchp_slot_find(primary_bus, dev_func >> 3, 0);
+
+			while (func && (func->function != (dev_func & 0x07))) {
+				dbg("func = %p b:d:f(%x:%x:%x)\n", func, primary_bus, dev_func >> 3, index);
+				func = shpchp_slot_find(primary_bus, dev_func >> 3, index++);
+			}
+
+			/* If we can't find a match, skip this table entry */
+			if (!func) {
+				i--;
+				one_slot += sizeof(struct slot_rt);
+				continue;
+			}
+			/* This may not work and shouldn't be used */
+			if (secondary_bus != primary_bus)
+				bridged_slot = 1;
+			else
+				bridged_slot = 0;
+
+			populated_slot = 1;
+		} else {
+			populated_slot = 0;
+			bridged_slot = 0;
+		}
+		dbg("slot populated =%s \n", populated_slot?"yes":"no");
+
+		/* If we've got a valid IO base, use it */
+
+		temp_ulong = io_base + io_length;
+
+		if ((io_base) && (temp_ulong <= 0x10000)) {
+			io_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
+			if (!io_node)
+				return -ENOMEM;
+
+			io_node->base = (ulong)io_base;
+			io_node->length = (ulong)io_length;
+			dbg("found io_node(base, length) = %x, %x\n", io_node->base, io_node->length);
+
+			if (!populated_slot) {
+				io_node->next = ctrl->io_head;
+				ctrl->io_head = io_node;
+			} else {
+				io_node->next = func->io_head;
+				func->io_head = io_node;
+			}
+		}
+
+		/* If we've got a valid memory base, use it */
+		temp_ulong = mem_base + mem_length;
+		if ((mem_base) && (temp_ulong <= 0x10000)) {
+			mem_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
+			if (!mem_node)
+				return -ENOMEM;
+
+			mem_node->base = (ulong)mem_base << 16;
+			mem_node->length = (ulong)(mem_length << 16);
+			dbg("found mem_node(base, length) = %x, %x\n", mem_node->base, mem_node->length);
+
+			if (!populated_slot) {
+				mem_node->next = ctrl->mem_head;
+				ctrl->mem_head = mem_node;
+			} else {
+				mem_node->next = func->mem_head;
+				func->mem_head = mem_node;
+			}
+		}
+
+		/*
+		 * If we've got a valid prefetchable memory base, and
+		 * the base + length isn't greater than 0xFFFF
+		 */
+		temp_ulong = pre_mem_base + pre_mem_length;
+		if ((pre_mem_base) && (temp_ulong <= 0x10000)) {
+			p_mem_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
+			if (!p_mem_node)
+				return -ENOMEM;
+
+			p_mem_node->base = (ulong)pre_mem_base << 16;
+			p_mem_node->length = (ulong)pre_mem_length << 16;
+			dbg("found p_mem_node(base, length) = %x, %x\n", p_mem_node->base, p_mem_node->length);
+
+			if (!populated_slot) {
+				p_mem_node->next = ctrl->p_mem_head;
+				ctrl->p_mem_head = p_mem_node;
+			} else {
+				p_mem_node->next = func->p_mem_head;
+				func->p_mem_head = p_mem_node;
+			}
+		}
+
+		/*
+		 * If we've got a valid bus number, use it
+		 * The second condition is to ignore bus numbers on
+		 * populated slots that don't have PCI-PCI bridges
+		 */
+		if (secondary_bus && (secondary_bus != primary_bus)) {
+			bus_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
+			if (!bus_node)
+				return -ENOMEM;
+
+			bus_node->base = (ulong)secondary_bus;
+			bus_node->length = (ulong)(max_bus - secondary_bus + 1);
+			dbg("found bus_node(base, length) = %x, %x\n", bus_node->base, bus_node->length);
+
+			if (!populated_slot) {
+				bus_node->next = ctrl->bus_head;
+				ctrl->bus_head = bus_node;
+			} else {
+				bus_node->next = func->bus_head;
+				func->bus_head = bus_node;
+			}
+		}
+
+		i--;
+		one_slot += sizeof(struct slot_rt);
+	}
+
+	/* If all of the following fail, we don't have any resources for hot plug add */
+	rc = 1;
+	rc &= shpchp_resource_sort_and_combine(&(ctrl->mem_head));
+	rc &= shpchp_resource_sort_and_combine(&(ctrl->p_mem_head));
+	rc &= shpchp_resource_sort_and_combine(&(ctrl->io_head));
+	rc &= shpchp_resource_sort_and_combine(&(ctrl->bus_head));
+
+	return (rc);
+}
+
+int shpchprm_set_hpp(
+	struct controller *ctrl,
+	struct pci_func *func,
+	u8	card_type)
+{
+	u32 rc;
+	u8 temp_byte;
+	struct pci_bus lpci_bus, *pci_bus;
+	unsigned int	devfn;
+	memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
+	pci_bus = &lpci_bus;
+	pci_bus->number = func->bus;
+	devfn = PCI_DEVFN(func->device, func->function);
+
+	temp_byte = 0x40;	/* Hard coded value for LT */
+	if (card_type == PCI_HEADER_TYPE_BRIDGE) {
+		/* Set subordinate Latency Timer */
+		rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, temp_byte);
+		if (rc) {
+			dbg("%s: set secondary LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
+			return rc;
+		}
+	}
+
+	/* Set base Latency Timer */
+	rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, temp_byte);
+	if (rc) {
+		dbg("%s: set LT error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
+		return rc;
+	}
+
+	/* Set Cache Line size */
+	temp_byte = 0x08;	/* hard coded value for CLS */
+	rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, temp_byte);
+	if (rc) {
+		dbg("%s: set CLS error. b:d:f(%02x:%02x:%02x)\n", __FUNCTION__, func->bus, func->device, func->function);
+	}
+
+	/* Set enable_perr */
+	/* Set enable_serr */
+
+	return rc;
+}
+
+void shpchprm_enable_card(
+	struct controller *ctrl,
+	struct pci_func *func,
+	u8 card_type)
+{
+	u16 command, bcommand;
+	struct pci_bus lpci_bus, *pci_bus;
+	unsigned int devfn;
+	int rc;
+
+	memcpy(&lpci_bus, ctrl->pci_bus, sizeof(lpci_bus));
+	pci_bus = &lpci_bus;
+	pci_bus->number = func->bus;
+	devfn = PCI_DEVFN(func->device, func->function);
+
+	rc = pci_bus_read_config_word(pci_bus, devfn, PCI_COMMAND, &command);
+	command |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR
+		| PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE
+		| PCI_COMMAND_IO | PCI_COMMAND_MEMORY;
+	rc = pci_bus_write_config_word(pci_bus, devfn, PCI_COMMAND, command);
+
+	if (card_type == PCI_HEADER_TYPE_BRIDGE) {
+		rc = pci_bus_read_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, &bcommand);
+		bcommand |= PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR
+			| PCI_BRIDGE_CTL_NO_ISA;
+		rc = pci_bus_write_config_word(pci_bus, devfn, PCI_BRIDGE_CONTROL, bcommand);
+	}
+}
+
+static int legacy_shpchprm_init_pci(void)
+{
+	shpchp_rom_start = (u8 *) ioremap(ROM_PHY_ADDR, ROM_PHY_LEN);
+	if (!shpchp_rom_start) {
+		err("Could not ioremap memory region for ROM\n");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+int shpchprm_init(enum php_ctlr_type ctrl_type)
+{
+	int retval;
+
+	switch (ctrl_type) {
+	case PCI:
+		retval = legacy_shpchprm_init_pci();
+		break;
+	default:
+		retval = -ENODEV;
+		break;
+	}
+
+	return retval;
+}