[PATCH] patch 1/8] pciehp: use the PCI core for hotplug resource management

This patch converts the pci express hotplug controller driver
to use the PCI core for resource management. This eliminates a
lot of duplicated code and integrates pciehp with the system's
normal PCI handling code.

Signed-off-by: Rajesh Shah <rajesh.shah@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 0 insertions, 347 deletions

diff --git a/drivers/pci/hotplug/pciehprm_nonacpi.c b/drivers/pci/hotplug/pciehprm_nonacpi.c
index 76c727c74cc..ed68c3dd0f0 100644
--- a/drivers/pci/hotplug/pciehprm_nonacpi.c
+++ b/drivers/pci/hotplug/pciehprm_nonacpi.c
@@ -35,12 +35,7 @@
 #include <linux/pci.h>
 #include <linux/init.h>
 #include <linux/slab.h>
-
 #include <asm/uaccess.h>
-#ifdef CONFIG_IA64
-#include <asm/iosapic.h>
-#endif
-
 #include "pciehp.h"
 #include "pciehprm.h"
 #include "pciehprm_nonacpi.h"
@@ -51,11 +46,6 @@ void pciehprm_cleanup(void)
 	return;
 }
 
-int pciehprm_print_pirt(void)
-{
-	return 0;
-}
-
 int pciehprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busnum, u8 devnum)
 {
 
@@ -63,343 +53,6 @@ int pciehprm_get_physical_slot_number(struct controller *ctrl, u32 *sun, u8 busn
 	return 0;
 }
 
-
-static void print_pci_resource ( struct pci_resource	*aprh)
-{
-	struct pci_resource	*res;
-
-	for (res = aprh; res; res = res->next)
-		dbg("        base= 0x%x length= 0x%x\n", res->base, res->length);
-}
-
-
-static void phprm_dump_func_res( struct pci_func *fun)
-{
-	struct pci_func *func = fun;
-
-	if (func->bus_head) {
-		dbg(":    BUS Resources:\n");
-		print_pci_resource (func->bus_head);
-	}
-	if (func->io_head) {
-		dbg(":    IO Resources:\n");
-		print_pci_resource (func->io_head);
-	}
-	if (func->mem_head) {
-		dbg(":    MEM Resources:\n");
-		print_pci_resource (func->mem_head);
-	}
-	if (func->p_mem_head) {
-		dbg(":    PMEM Resources:\n");
-		print_pci_resource (func->p_mem_head);
-	}
-}
-
-static int phprm_get_used_resources (
-	struct controller *ctrl,
-	struct pci_func *func
-	)
-{
-	return pciehp_save_used_resources (ctrl, func, !DISABLE_CARD);
-}
-
-static int phprm_delete_resource(
-	struct pci_resource **aprh,
-	ulong base,
-	ulong size)
-{
-	struct pci_resource *res;
-	struct pci_resource *prevnode;
-	struct pci_resource *split_node;
-	ulong tbase;
-
-	pciehp_resource_sort_and_combine(aprh);
-
-	for (res = *aprh; res; res = res->next) {
-		if (res->base > base)
-			continue;
-
-		if ((res->base + res->length) < (base + size))
-			continue;
-
-		if (res->base < base) {
-			tbase = base;
-
-			if ((res->length - (tbase - res->base)) < size)
-				continue;
-
-			split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
-			if (!split_node)
-				return -ENOMEM;
-
-			split_node->base = res->base;
-			split_node->length = tbase - res->base;
-			res->base = tbase;
-			res->length -= split_node->length;
-
-			split_node->next = res->next;
-			res->next = split_node;
-		}
-
-		if (res->length >= size) {
-			split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
-			if (!split_node)
-				return -ENOMEM;
-
-			split_node->base = res->base + size;
-			split_node->length = res->length - size;
-			res->length = size;
-
-			split_node->next = res->next;
-			res->next = split_node;
-		}
-
-		if (*aprh == res) {
-			*aprh = res->next;
-		} else {
-			prevnode = *aprh;
-			while (prevnode->next != res)
-				prevnode = prevnode->next;
-
-			prevnode->next = res->next;
-		}
-		res->next = NULL;
-		kfree(res);
-		break;
-	}
-
-	return 0;
-}
-
-
-static int phprm_delete_resources(
-	struct pci_resource **aprh,
-	struct pci_resource *this
-	)
-{
-	struct pci_resource *res;
-
-	for (res = this; res; res = res->next)
-		phprm_delete_resource(aprh, res->base, res->length);
-
-	return 0;
-}
-
-
-static int configure_existing_function(
-	struct controller *ctrl,
-	struct pci_func *func
-	)
-{
-	int rc;
-
-	/* see how much resources the func has used. */
-	rc = phprm_get_used_resources (ctrl, func);
-
-	if (!rc) {
-		/* subtract the resources used by the func from ctrl resources */
-		rc  = phprm_delete_resources (&ctrl->bus_head, func->bus_head);
-		rc |= phprm_delete_resources (&ctrl->io_head, func->io_head);
-		rc |= phprm_delete_resources (&ctrl->mem_head, func->mem_head);
-		rc |= phprm_delete_resources (&ctrl->p_mem_head, func->p_mem_head);
-		if (rc)
-			warn("aCEF: cannot del used resources\n");
-	} else
-		err("aCEF: cannot get used resources\n");
-
-	return rc;
-}
-
-static int pciehprm_delete_resource(
-	struct pci_resource **aprh,
-	ulong base,
-	ulong size)
-{
-	struct pci_resource *res;
-	struct pci_resource *prevnode;
-	struct pci_resource *split_node;
-	ulong tbase;
-
-	pciehp_resource_sort_and_combine(aprh);
-
-	for (res = *aprh; res; res = res->next) {
-		if (res->base > base)
-			continue;
-
-		if ((res->base + res->length) < (base + size))
-			continue;
-
-		if (res->base < base) {
-			tbase = base;
-
-			if ((res->length - (tbase - res->base)) < size)
-				continue;
-
-			split_node = (struct pci_resource *) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
-			if (!split_node)
-				return -ENOMEM;
-
-			split_node->base = res->base;
-			split_node->length = tbase - res->base;
-			res->base = tbase;
-			res->length -= split_node->length;
-
-			split_node->next = res->next;
-			res->next = split_node;
-		}
-
-		if (res->length >= size) {
-			split_node = (struct pci_resource*) kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
-			if (!split_node)
-				return -ENOMEM;
-
-			split_node->base = res->base + size;
-			split_node->length = res->length - size;
-			res->length = size;
-
-			split_node->next = res->next;
-			res->next = split_node;
-		}
-
-		if (*aprh == res) {
-			*aprh = res->next;
-		} else {
-			prevnode = *aprh;
-			while (prevnode->next != res)
-				prevnode = prevnode->next;
-
-			prevnode->next = res->next;
-		}
-		res->next = NULL;
-		kfree(res);
-		break;
-	}
-
-	return 0;
-}
-
-static int bind_pci_resources_to_slots ( struct controller *ctrl)
-{
-	struct pci_func *func, new_func;
-	int busn = ctrl->slot_bus;
-	int devn, funn;
-	u32	vid;
-
-	for (devn = 0; devn < 32; devn++) {
-		for (funn = 0; funn < 8; funn++) {
-			/*
-			if (devn == ctrl->device && funn == ctrl->function)
-				continue;
-			*/
-			/* find out if this entry is for an occupied slot */
-			vid = 0xFFFFFFFF;
-
-			pci_bus_read_config_dword(ctrl->pci_dev->subordinate, PCI_DEVFN(devn, funn), PCI_VENDOR_ID, &vid);
-
-			if (vid != 0xFFFFFFFF) {
-				dbg("%s: vid = %x bus %x dev %x fun %x\n", __FUNCTION__,
-				vid, busn, devn, funn);
-				func = pciehp_slot_find(busn, devn, funn);
-				dbg("%s: func = %p\n", __FUNCTION__,func);
-				if (!func) {
-					memset(&new_func, 0, sizeof(struct pci_func));
-					new_func.bus = busn;
-					new_func.device = devn;
-					new_func.function = funn;
-					new_func.is_a_board = 1;
-					configure_existing_function(ctrl, &new_func);
-					phprm_dump_func_res(&new_func);
-				} else {
-					configure_existing_function(ctrl, func);
-					phprm_dump_func_res(func);
-				}
-				dbg("aCCF:existing PCI 0x%x Func ResourceDump\n", ctrl->bus);
-			}
-		}
-	}
-
-	return 0;
-}
-
-static void phprm_dump_ctrl_res( struct controller *ctlr)
-{
-	struct controller *ctrl = ctlr;
-
-	if (ctrl->bus_head) {
-		dbg(":    BUS Resources:\n");
-		print_pci_resource (ctrl->bus_head);
-	}
-	if (ctrl->io_head) {
-		dbg(":    IO Resources:\n");
-		print_pci_resource (ctrl->io_head);
-	}
-	if (ctrl->mem_head) {
-		dbg(":    MEM Resources:\n");
-		print_pci_resource (ctrl->mem_head);
-	}
-	if (ctrl->p_mem_head) {
-		dbg(":    PMEM Resources:\n");
-		print_pci_resource (ctrl->p_mem_head);
-	}
-}
-
-/*
- * phprm_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 pciehprm_find_available_resources(struct controller *ctrl)
-{
-	struct pci_func func;
-	u32 rc;
-
-	memset(&func, 0, sizeof(struct pci_func));
-
-	func.bus = ctrl->bus;
-	func.device = ctrl->device;
-	func.function = ctrl->function;
-	func.is_a_board = 1;
-
-	/* Get resources for this PCI bridge */
-	rc = pciehp_save_used_resources (ctrl, &func, !DISABLE_CARD);
-	dbg("%s: pciehp_save_used_resources rc = %d\n", __FUNCTION__, rc);
-
-	if (func.mem_head)
-		func.mem_head->next = ctrl->mem_head;
-	ctrl->mem_head = func.mem_head;
-
-	if (func.p_mem_head)
-		func.p_mem_head->next = ctrl->p_mem_head;
-	ctrl->p_mem_head = func.p_mem_head;
-
-	if (func.io_head)
-		func.io_head->next = ctrl->io_head;
-	ctrl->io_head = func.io_head;
-
-	if(func.bus_head)
-		func.bus_head->next = ctrl->bus_head;
-	ctrl->bus_head = func.bus_head;
-
-	if (ctrl->bus_head)
-		pciehprm_delete_resource(&ctrl->bus_head, ctrl->pci_dev->subordinate->number, 1);
-	
-	dbg("%s:pre-Bind PCI 0x%x Ctrl Resource Dump\n", __FUNCTION__, ctrl->bus);
-	phprm_dump_ctrl_res(ctrl);
-
-	dbg("%s: before bind_pci_resources_to slots\n", __FUNCTION__);
-
-	bind_pci_resources_to_slots (ctrl);
-
-	dbg("%s:post-Bind PCI 0x%x Ctrl Resource Dump\n", __FUNCTION__, ctrl->bus);
-	phprm_dump_ctrl_res(ctrl);
-
-	return (rc);
-}
-
 int pciehprm_set_hpp(
 	struct controller *ctrl,
 	struct pci_func *func,