[PATCH] PCI Hotplug: Add SHPC and PCI Express hot-plug drivers

drivers/pci/hotplug/Kconfig

@@ -122,5 +122,72 @@ config HOTPLUG_PCI_CPCI_GENERIC
 
 	  When in doubt, say N.
 
+config HOTPLUG_PCI_PCIE
+	tristate "PCI Express Hotplug driver"
+	depends on HOTPLUG_PCI
+	help
+	  Say Y here if you have a motherboard that supports PCI Express Native
+	  Hotplug
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called pciehp.
+
+	  When in doubt, say N.
+
+config HOTPLUG_PCI_PCIE_POLL_EVENT_MODE
+	bool "Use polling mechanism for hot-plug events."
+	depends on HOTPLUG_PCI_PCIE
+	help
+	  Say Y here if you want to use the polling mechanism for hot-plug 
+	  events.
+	   
+	  When in doubt, say N.
+
+config HOTPLUG_PCI_PCIE_PHPRM_NONACPI
+	bool "Non-ACPI: Use $HPRT for resource/configuration"
+	depends on HOTPLUG_PCI_PCIE
+	help
+	  Say Y here if Hotplug resource/configuration information is provided
+	  by platform BIOS $HPRT or bridge resource information, not by ACPI.
+
+	  When in doubt, say N.
+
+config HOTPLUG_PCI_SHPC
+	tristate "SHPC PCI Hotplug driver"
+	depends on HOTPLUG_PCI
+	help
+	  Say Y here if you have a motherboard with a SHPC PCI Hotplug
+	  controller.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called shpchp.
+
+	  When in doubt, say N.
+
+config HOTPLUG_PCI_SHPC_POLL_EVENT_MODE
+	bool "Use polling mechanism for hot-plug events"
+	depends on HOTPLUG_PCI_SHPC
+	help
+	  Say Y here if you want to use the polling mechanism for hot-plug 
+	  events.
+
+	  When in doubt, say N.
+
+config HOTPLUG_PCI_SHPC_PHPRM_NONACPI
+	bool "Non-ACPI: Use $HPRT for resource/configuration"
+	depends on HOTPLUG_PCI_SHPC
+	help
+	  Say Y here if Hotplug resource/configuration information is provided
+	  by platform BIOS $HPRT or bridge resource information, not by ACPI.
+
+	  When in doubt, say N.
+
+config HOTPLUG_PCI_SHPC_PHPRM_LEGACY
+	bool "For AMD SHPC only: Use $HRT for resource/configuration"
+	depends on HOTPLUG_PCI_SHPC && HOTPLUG_PCI_SHPC_PHPRM_NONACPI
+	help
+	  Say Y here for AMD SHPC. You have to select this option if you are 
+	  using this driver on AMD platform with SHPC.
+
 endmenu
 

drivers/pci/hotplug/Makefile

@@ -9,6 +9,8 @@ obj-$(CONFIG_HOTPLUG_PCI_IBM)		+= ibmphp.o
 obj-$(CONFIG_HOTPLUG_PCI_ACPI)		+= acpiphp.o
 obj-$(CONFIG_HOTPLUG_PCI_CPCI_ZT5550)	+= cpcihp_zt5550.o
 obj-$(CONFIG_HOTPLUG_PCI_CPCI_GENERIC)	+= cpcihp_generic.o
+obj-$(CONFIG_HOTPLUG_PCI_PCIE)		+= pciehp.o
+obj-$(CONFIG_HOTPLUG_PCI_SHPC)		+= shpchp.o
 
 pci_hotplug-objs	:=	pci_hotplug_core.o
 
@@ -33,6 +35,18 @@ acpiphp-objs		:=	acpiphp_core.o	\
 				acpiphp_pci.o	\
 				acpiphp_res.o
 
+pciehp-objs		:=	pciehp_core.o	\
+				pciehp_ctrl.o	\
+				pciehp_pci.o	\
+				pciehp_sysfs.o	\
+				pciehp_hpc.o
+
+shpchp-objs		:=	shpchp_core.o	\
+				shpchp_ctrl.o	\
+				shpchp_pci.o	\
+				shpchp_sysfs.o	\
+				shpchp_hpc.o
+
 ifdef CONFIG_HOTPLUG_PCI_ACPI
   EXTRA_CFLAGS  += -D_LINUX -I$(TOPDIR)/drivers/acpi
   ifdef CONFIG_ACPI_DEBUG
@@ -43,3 +57,21 @@ endif
 ifeq ($(CONFIG_HOTPLUG_PCI_COMPAQ_NVRAM),y)
 	cpqphp-objs += cpqphp_nvram.o
 endif
+
+ifeq ($(CONFIG_HOTPLUG_PCI_PCIE_PHPRM_NONACPI),y)
+  pciehp-objs += pciehprm_nonacpi.o
+else
+  pciehp-objs += pciehprm_acpi.o
+  EXTRA_CFLAGS  += -D_LINUX -I$(TOPDIR)/drivers/acpi -I$(TOPDIR)/drivers/acpi/include 
+endif
+
+ifeq ($(CONFIG_HOTPLUG_PCI_SHPC_PHPRM_LEGACY),y)
+  shpchp-objs += shpchprm_legacy.o
+else
+   ifeq ($(CONFIG_HOTPLUG_PCI_SHPC_PHPRM_NONACPI),y)
+     shpchp-objs += shpchprm_nonacpi.o
+   else
+      shpchp-objs += shpchprm_acpi.o
+      EXTRA_CFLAGS  += -D_LINUX -I$(TOPDIR)/drivers/acpi 
+   endif
+endif

drivers/pci/hotplug/pci_hotplug.h

@@ -36,6 +36,9 @@ enum pci_bus_speed {
 	PCI_SPEED_66MHz_PCIX		= 0x02,
 	PCI_SPEED_100MHz_PCIX		= 0x03,
 	PCI_SPEED_133MHz_PCIX		= 0x04,
+	PCI_SPEED_66MHz_PCIX_ECC	= 0x05,
+	PCI_SPEED_100MHz_PCIX_ECC	= 0x06,
+	PCI_SPEED_133MHz_PCIX_ECC	= 0x07,
 	PCI_SPEED_66MHz_PCIX_266	= 0x09,
 	PCI_SPEED_100MHz_PCIX_266	= 0x0a,
 	PCI_SPEED_133MHz_PCIX_266	= 0x0b,
@@ -45,6 +48,24 @@ enum pci_bus_speed {
 	PCI_SPEED_UNKNOWN		= 0xff,
 };
 
+/* These values come from the PCI Express Spec */
+enum pcie_link_width {
+	PCIE_LNK_WIDTH_RESRV	= 0x00,
+	PCIE_LNK_X1		= 0x01,
+	PCIE_LNK_X2		= 0x02,
+	PCIE_LNK_X4		= 0x04,
+	PCIE_LNK_X8		= 0x08,
+	PCIE_LNK_X12		= 0x0C,
+	PCIE_LNK_X16		= 0x10,
+	PCIE_LNK_X32		= 0x20,
+	PCIE_LNK_WIDTH_UNKNOWN  = 0xFF,
+};
+
+enum pcie_link_speed {
+	PCIE_2PT5GB		= 0x14,
+	PCIE_LNK_SPEED_UNKNOWN	= 0xFF,
+};
+
 struct hotplug_slot;
 struct hotplug_slot_attribute {
 	struct attribute attr;

drivers/pci/hotplug/pci_hotplug_core.c

@@ -129,6 +129,7 @@ static char *pci_bus_speed_strings[] = {
 	"66 MHz PCIX 533",	/* 0x11 */
 	"100 MHz PCIX 533",	/* 0x12 */
 	"133 MHz PCIX 533",	/* 0x13 */
+	"25 GBps PCI-E",	/* 0x14 */
 };
 
 #ifdef CONFIG_HOTPLUG_PCI_CPCI

drivers/pci/hotplug/pciehp_sysfs.c

+/*
+ * PCI Express Hot Plug Controller Driver
+ *
+ * Copyright (C) 1995,2001 Compaq Computer Corporation
+ * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com)
+ * Copyright (C) 2001 IBM Corp.
+ *
+ * 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>
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/workqueue.h>
+#include <linux/pci.h>
+#include "pciehp.h"
+
+
+/* A few routines that create sysfs entries for the hot plug controller */
+
+static int show_ctrl (struct device *dev, char *buf)
+{
+	struct pci_dev *pci_dev;
+	struct controller *ctrl;
+	char * out = buf;
+	int index;
+	struct pci_resource *res;
+
+	pci_dev = container_of (dev, struct pci_dev, dev);
+	ctrl = pci_get_drvdata(pci_dev);
+
+	out += sprintf(buf, "Free resources: memory\n");
+	index = 11;
+	res = ctrl->mem_head;
+	while (res && index--) {
+		out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
+		res = res->next;
+	}
+	out += sprintf(out, "Free resources: prefetchable memory\n");
+	index = 11;
+	res = ctrl->p_mem_head;
+	while (res && index--) {
+		out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
+		res = res->next;
+	}
+	out += sprintf(out, "Free resources: IO\n");
+	index = 11;
+	res = ctrl->io_head;
+	while (res && index--) {
+		out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
+		res = res->next;
+	}
+	out += sprintf(out, "Free resources: bus numbers\n");
+	index = 11;
+	res = ctrl->bus_head;
+	while (res && index--) {
+		out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
+		res = res->next;
+	}
+
+	return out - buf;
+}
+static DEVICE_ATTR (ctrl, S_IRUGO, show_ctrl, NULL);
+
+static int show_dev (struct device *dev, char *buf)
+{
+	struct pci_dev *pci_dev;
+	struct controller *ctrl;
+	char * out = buf;
+	int index;
+	struct pci_resource *res;
+	struct pci_func *new_slot;
+	struct slot *slot;
+
+	pci_dev = container_of (dev, struct pci_dev, dev);
+	ctrl = pci_get_drvdata(pci_dev);
+
+	slot=ctrl->slot;
+
+	while (slot) {
+		new_slot = pciehp_slot_find(slot->bus, slot->device, 0);
+		if (!new_slot)
+			break;
+		out += sprintf(out, "assigned resources: memory\n");
+		index = 11;
+		res = new_slot->mem_head;
+		while (res && index--) {
+			out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
+			res = res->next;
+		}
+		out += sprintf(out, "assigned resources: prefetchable memory\n");
+		index = 11;
+		res = new_slot->p_mem_head;
+		while (res && index--) {
+			out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
+			res = res->next;
+		}
+		out += sprintf(out, "assigned resources: IO\n");
+		index = 11;
+		res = new_slot->io_head;
+		while (res && index--) {
+			out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
+			res = res->next;
+		}
+		out += sprintf(out, "assigned resources: bus numbers\n");
+		index = 11;
+		res = new_slot->bus_head;
+		while (res && index--) {
+			out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length);
+			res = res->next;
+		}
+		slot=slot->next;
+	}
+
+	return out - buf;
+}
+static DEVICE_ATTR (dev, S_IRUGO, show_dev, NULL);
+
+void pciehp_create_ctrl_files (struct controller *ctrl)
+{
+	device_create_file (&ctrl->pci_dev->dev, &dev_attr_ctrl);
+	device_create_file (&ctrl->pci_dev->dev, &dev_attr_dev);
+}

drivers/pci/hotplug/pciehprm.h

+/*
+ * PCIEHPRM : PCIEHP Resource Manager for ACPI/non-ACPI platform
+ *
+ * Copyright (C) 1995,2001 Compaq Computer Corporation
+ * Copyright (C) 2001,2003 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>
+ *
+ */
+
+#ifndef _PCIEHPRM_H_
+#define _PCIEHPRM_H_
+
+#ifdef	CONFIG_HOTPLUG_PCI_PCIE_PHPRM_NONACPI
+#include "pciehprm_nonacpi.h"
+#endif
+
+int pciehprm_init(enum php_ctlr_type ct);
+void pciehprm_cleanup(void);
+int pciehprm_print_pirt(void);
+void *pciehprm_get_slot(struct slot *slot);
+int pciehprm_find_available_resources(struct controller *ctrl);
+int pciehprm_set_hpp(struct controller *ctrl, struct pci_func *func, u8 card_type);
+void pciehprm_enable_card(struct controller *ctrl, struct pci_func *func, u8 card_type);
+
+#ifdef	DEBUG
+#define RES_CHECK(this, bits)	\
+	{ if (((this) & (bits - 1))) \
+		printk("%s:%d ERR: potential res loss!\n", __FUNCTION__, __LINE__); }
+#else
+#define RES_CHECK(this, bits)
+#endif
+
+#endif				/* _PCIEHPRM_H_ */

drivers/pci/hotplug/pciehprm_nonacpi.h

+/*
+ * PCIEHPRM NONACPI: 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>
+ *
+ */
+
+#ifndef _PCIEHPRM_NONACPI_H_
+#define _PCIEHPRM_NONACPI_H_
+
+struct irq_info {
+	u8 bus, devfn;		/* bus, device and function */
+	struct {
+		u8 link;	/* IRQ line ID, chipset dependent, 0=not routed */
+		u16 bitmap;	/* Available IRQs */
+	} __attribute__ ((packed)) irq[4];
+	u8 slot;		/* slot number, 0=onboard */
+	u8 rfu;
+} __attribute__ ((packed));
+
+struct irq_routing_table {
+	u32 signature;		/* PIRQ_SIGNATURE should be here */
+	u16 version;		/* PIRQ_VERSION */
+	u16 size;			/* Table size in bytes */
+	u8 rtr_bus, rtr_devfn;	/* Where the interrupt router lies */
+	u16 exclusive_irqs;	/* IRQs devoted exclusively to PCI usage */
+	u16 rtr_vendor, rtr_device;	/* Vendor and device ID of interrupt router */
+	u32 miniport_data;	/* Crap */
+	u8 rfu[11];
+	u8 checksum;		/* Modulo 256 checksum must give zero */
+	struct irq_info slots[0];
+} __attribute__ ((packed));
+
+#endif				/* _PCIEHPRM_NONACPI_H_ */