Commit 3bb07f1b authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'pci-for-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci 

Pull PCI changes from Bjorn Helgaas:
 - Host bridge cleanups from Yinghai
 - Disable Bus Master bit on PCI device shutdown (kexec-related)
 - Stratus ftServer fix
 - pci_dev_reset() locking fix
 - IvyBridge graphics erratum workaround

* tag 'pci-for-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (21 commits)
  microblaze/PCI: fix "io_offset undeclared" error
  x86/PCI: only check for spinlock being held in SMP kernels
  resources: add resource_overlaps()
  PCI: fix uninitialized variable 'cap_mask'
  MAINTAINERS: update PCI git tree and patchwork
  PCI: disable Bus Master on PCI device shutdown
  PCI: work around IvyBridge internal graphics FLR erratum
  x86/PCI: fix unused variable warning in amd_bus.c
  PCI: move mutex locking out of pci_dev_reset function
  PCI: work around Stratus ftServer broken PCIe hierarchy
  x86/PCI: merge pcibios_scan_root() and pci_scan_bus_on_node()
  x86/PCI: dynamically allocate pci_root_info for native host bridge drivers
  x86/PCI: embed pci_sysdata into pci_root_info on ACPI path
  x86/PCI: embed name into pci_root_info struct
  x86/PCI: add host bridge resource release for _CRS path
  x86/PCI: refactor get_current_resources()
  PCI: add host bridge release support
  PCI: add generic device into pci_host_bridge struct
  PCI: rename pci_host_bridge() to find_pci_root_bridge()
  x86/PCI: fix memleak with get_current_resources()
  ...
parents 6326c71f 5420e46d

Documentation/kernel-parameters.txt

+3 −0
Original line number Diff line number Diff line
@@ -2161,6 +2161,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted. 
				on: Turn realloc on

		realloc		same as realloc=on

		noari		do not use PCIe ARI.

		pcie_scan_all	Scan all possible PCIe devices.  Otherwise we

				only look for one device below a PCIe downstream

				port.



	pcie_aspm=	[PCIE] Forcibly enable or disable PCIe Active State Power

			Management.

MAINTAINERS

+2 −8
Original line number Diff line number Diff line
@@ -5128,19 +5128,13 @@ F: Documentation/powerpc/eeh-pci-error-recovery.txt 
PCI SUBSYSTEM

M:	Bjorn Helgaas <bhelgaas@google.com>

L:	linux-pci@vger.kernel.org

Q:	http://patchwork.kernel.org/project/linux-pci/list/

T:	git git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci.git

Q:	http://patchwork.ozlabs.org/project/linux-pci/list/

T:	git git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/linux.git

S:	Supported

F:	Documentation/PCI/

F:	drivers/pci/

F:	include/linux/pci*



PCI HOTPLUG

M:	Bjorn Helgaas <bhelgaas@google.com>

L:	linux-pci@vger.kernel.org

S:	Supported

F:	drivers/pci/hotplug



PCMCIA SUBSYSTEM

P:	Linux PCMCIA Team

L:	linux-pcmcia@lists.infradead.org

arch/microblaze/pci/pci-common.c

+1 −0
Original line number Diff line number Diff line
@@ -1422,6 +1422,7 @@ int pcibios_enable_device(struct pci_dev *dev, int mask) 


static void __devinit pcibios_setup_phb_resources(struct pci_controller *hose, struct list_head *resources)

{

	unsigned long io_offset;

	struct resource *res;

	int i;

arch/x86/pci/acpi.c

+72 −56
Original line number Diff line number Diff line
@@ -9,11 +9,11 @@ 


struct pci_root_info {

	struct acpi_device *bridge;

	char *name;

	char name[16];

	unsigned int res_num;

	struct resource *res;

	struct list_head *resources;

	int busnum;

	struct pci_sysdata sd;

};



static bool pci_use_crs = true;
@@ -245,13 +245,6 @@ setup_resource(struct acpi_resource *acpi_res, void *data) 
	return AE_OK;

}



static bool resource_contains(struct resource *res, resource_size_t point)

{

	if (res->start <= point && point <= res->end)

		return true;

	return false;

}



static void coalesce_windows(struct pci_root_info *info, unsigned long type)

{

	int i, j;
@@ -272,10 +265,7 @@ static void coalesce_windows(struct pci_root_info *info, unsigned long type) 
			 * our resources no longer match the ACPI _CRS, but

			 * the kernel resource tree doesn't allow overlaps.

			 */

			if (resource_contains(res1, res2->start) ||

			    resource_contains(res1, res2->end) ||

			    resource_contains(res2, res1->start) ||

			    resource_contains(res2, res1->end)) {

			if (resource_overlaps(res1, res2)) {

				res1->start = min(res1->start, res2->start);

				res1->end = max(res1->end, res2->end);

				dev_info(&info->bridge->dev,
@@ -287,7 +277,8 @@ static void coalesce_windows(struct pci_root_info *info, unsigned long type) 
	}

}



static void add_resources(struct pci_root_info *info)

static void add_resources(struct pci_root_info *info,

			  struct list_head *resources)

{

	int i;

	struct resource *res, *root, *conflict;
@@ -311,53 +302,74 @@ static void add_resources(struct pci_root_info *info) 
				 "ignoring host bridge window %pR (conflicts with %s %pR)\n",

				 res, conflict->name, conflict);

		else

			pci_add_resource(info->resources, res);

			pci_add_resource(resources, res);

	}

}



static void free_pci_root_info_res(struct pci_root_info *info)

{

	kfree(info->res);

	info->res = NULL;

	info->res_num = 0;

}



static void __release_pci_root_info(struct pci_root_info *info)

{

	int i;

	struct resource *res;



	for (i = 0; i < info->res_num; i++) {

		res = &info->res[i];



		if (!res->parent)

			continue;



		if (!(res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))

			continue;



		release_resource(res);

	}



	free_pci_root_info_res(info);



	kfree(info);

}

static void release_pci_root_info(struct pci_host_bridge *bridge)

{

	struct pci_root_info *info = bridge->release_data;



	__release_pci_root_info(info);

}



static void

get_current_resources(struct acpi_device *device, int busnum,

		      int domain, struct list_head *resources)

probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device,

		    int busnum, int domain)

{

	struct pci_root_info info;

	size_t size;



	info.bridge = device;

	info.res_num = 0;

	info.resources = resources;

	info->bridge = device;

	info->res_num = 0;

	acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,

				&info);

	if (!info.res_num)

				info);

	if (!info->res_num)

		return;



	size = sizeof(*info.res) * info.res_num;

	info.res = kmalloc(size, GFP_KERNEL);

	if (!info.res)

	size = sizeof(*info->res) * info->res_num;

	info->res_num = 0;

	info->res = kmalloc(size, GFP_KERNEL);

	if (!info->res)

		return;



	info.name = kasprintf(GFP_KERNEL, "PCI Bus %04x:%02x", domain, busnum);

	if (!info.name)

		goto name_alloc_fail;

	sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);



	info.res_num = 0;

	acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,

				&info);



	if (pci_use_crs) {

		add_resources(&info);



		return;

	}



	kfree(info.name);



name_alloc_fail:

	kfree(info.res);

				info);

}



struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)

{

	struct acpi_device *device = root->device;

	struct pci_root_info *info = NULL;

	int domain = root->segment;

	int busnum = root->secondary.start;

	LIST_HEAD(resources);
@@ -389,17 +401,14 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root) 
	if (node != -1 && !node_online(node))

		node = -1;



	/* Allocate per-root-bus (not per bus) arch-specific data.

	 * TODO: leak; this memory is never freed.

	 * It's arguable whether it's worth the trouble to care.

	 */

	sd = kzalloc(sizeof(*sd), GFP_KERNEL);

	if (!sd) {

	info = kzalloc(sizeof(*info), GFP_KERNEL);

	if (!info) {

		printk(KERN_WARNING "pci_bus %04x:%02x: "

		       "ignored (out of memory)\n", domain, busnum);

		return NULL;

	}



	sd = &info->sd;

	sd->domain = domain;

	sd->node = node;

	/*
@@ -413,22 +422,32 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root) 
		 * be replaced by sd.

		 */

		memcpy(bus->sysdata, sd, sizeof(*sd));

		kfree(sd);

		kfree(info);

	} else {

		get_current_resources(device, busnum, domain, &resources);

		probe_pci_root_info(info, device, busnum, domain);



		/*

		 * _CRS with no apertures is normal, so only fall back to

		 * defaults or native bridge info if we're ignoring _CRS.

		 */

		if (!pci_use_crs)

		if (pci_use_crs)

			add_resources(info, &resources);

		else {

			free_pci_root_info_res(info);

			x86_pci_root_bus_resources(busnum, &resources);

		}



		bus = pci_create_root_bus(NULL, busnum, &pci_root_ops, sd,

					  &resources);

		if (bus)

		if (bus) {

			bus->subordinate = pci_scan_child_bus(bus);

		else

			pci_set_host_bridge_release(

				to_pci_host_bridge(bus->bridge),

				release_pci_root_info, info);

		} else {

			pci_free_resource_list(&resources);

			__release_pci_root_info(info);

		}

	}



	/* After the PCI-E bus has been walked and all devices discovered,
@@ -445,9 +464,6 @@ struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root) 
		}

	}



	if (!bus)

		kfree(sd);



	if (bus && node != -1) {

#ifdef CONFIG_ACPI_NUMA

		if (pxm >= 0)

arch/x86/pci/amd_bus.c

+37 −54
Original line number Diff line number Diff line
@@ -32,6 +32,27 @@ static struct pci_hostbridge_probe pci_probes[] __initdata = { 


#define RANGE_NUM 16



static struct pci_root_info __init *find_pci_root_info(int node, int link)

{

	struct pci_root_info *info;



	/* find the position */

	list_for_each_entry(info, &pci_root_infos, list)

		if (info->node == node && info->link == link)

			return info;



	return NULL;

}



static void __init set_mp_bus_range_to_node(int min_bus, int max_bus, int node)

{

#ifdef CONFIG_NUMA

	int j;



	for (j = min_bus; j <= max_bus; j++)

		set_mp_bus_to_node(j, node);

#endif

}

/**

 * early_fill_mp_bus_to_node()

 * called before pcibios_scan_root and pci_scan_bus
@@ -41,7 +62,6 @@ static struct pci_hostbridge_probe pci_probes[] __initdata = { 
static int __init early_fill_mp_bus_info(void)

{

	int i;

	int j;

	unsigned bus;

	unsigned slot;

	int node;
@@ -50,7 +70,6 @@ static int __init early_fill_mp_bus_info(void) 
	int def_link;

	struct pci_root_info *info;

	u32 reg;

	struct resource *res;

	u64 start;

	u64 end;

	struct range range[RANGE_NUM];
@@ -86,7 +105,6 @@ static int __init early_fill_mp_bus_info(void) 
	if (!found)

		return 0;



	pci_root_num = 0;

	for (i = 0; i < 4; i++) {

		int min_bus;

		int max_bus;
@@ -99,19 +117,11 @@ static int __init early_fill_mp_bus_info(void) 
		min_bus = (reg >> 16) & 0xff;

		max_bus = (reg >> 24) & 0xff;

		node = (reg >> 4) & 0x07;

#ifdef CONFIG_NUMA

		for (j = min_bus; j <= max_bus; j++)

			set_mp_bus_to_node(j, node);

#endif

		set_mp_bus_range_to_node(min_bus, max_bus, node);

		link = (reg >> 8) & 0x03;



		info = &pci_root_info[pci_root_num];

		info->bus_min = min_bus;

		info->bus_max = max_bus;

		info->node = node;

		info->link = link;

		info = alloc_pci_root_info(min_bus, max_bus, node, link);

		sprintf(info->name, "PCI Bus #%02x", min_bus);

		pci_root_num++;

	}



	/* get the default node and link for left over res */
@@ -134,16 +144,10 @@ static int __init early_fill_mp_bus_info(void) 
		link = (reg >> 4) & 0x03;

		end = (reg & 0xfff000) | 0xfff;



		/* find the position */

		for (j = 0; j < pci_root_num; j++) {

			info = &pci_root_info[j];

			if (info->node == node && info->link == link)

				break;

		}

		if (j == pci_root_num)

		info = find_pci_root_info(node, link);

		if (!info)

			continue; /* not found */



		info = &pci_root_info[j];

		printk(KERN_DEBUG "node %d link %d: io port [%llx, %llx]\n",

		       node, link, start, end);
@@ -155,13 +159,8 @@ static int __init early_fill_mp_bus_info(void) 
	}

	/* add left over io port range to def node/link, [0, 0xffff] */

	/* find the position */

	for (j = 0; j < pci_root_num; j++) {

		info = &pci_root_info[j];

		if (info->node == def_node && info->link == def_link)

			break;

	}

	if (j < pci_root_num) {

		info = &pci_root_info[j];

	info = find_pci_root_info(def_node, def_link);

	if (info) {

		for (i = 0; i < RANGE_NUM; i++) {

			if (!range[i].end)

				continue;
@@ -214,16 +213,10 @@ static int __init early_fill_mp_bus_info(void) 
		end <<= 8;

		end |= 0xffff;



		/* find the position */

		for (j = 0; j < pci_root_num; j++) {

			info = &pci_root_info[j];

			if (info->node == node && info->link == link)

				break;

		}

		if (j == pci_root_num)

			continue; /* not found */

		info = find_pci_root_info(node, link);



		info = &pci_root_info[j];

		if (!info)

			continue;



		printk(KERN_DEBUG "node %d link %d: mmio [%llx, %llx]",

		       node, link, start, end);
@@ -291,14 +284,8 @@ static int __init early_fill_mp_bus_info(void) 
	 * add left over mmio range to def node/link ?

	 * that is tricky, just record range in from start_min to 4G

	 */

	for (j = 0; j < pci_root_num; j++) {

		info = &pci_root_info[j];

		if (info->node == def_node && info->link == def_link)

			break;

	}

	if (j < pci_root_num) {

		info = &pci_root_info[j];



	info = find_pci_root_info(def_node, def_link);

	if (info) {

		for (i = 0; i < RANGE_NUM; i++) {

			if (!range[i].end)

				continue;
@@ -309,20 +296,16 @@ static int __init early_fill_mp_bus_info(void) 
		}

	}



	for (i = 0; i < pci_root_num; i++) {

		int res_num;

	list_for_each_entry(info, &pci_root_infos, list) {

		int busnum;

		struct pci_root_res *root_res;



		info = &pci_root_info[i];

		res_num = info->res_num;

		busnum = info->bus_min;

		printk(KERN_DEBUG "bus: [%02x, %02x] on node %x link %x\n",

		       info->bus_min, info->bus_max, info->node, info->link);

		for (j = 0; j < res_num; j++) {

			res = &info->res[j];

			printk(KERN_DEBUG "bus: %02x index %x %pR\n",

				       busnum, j, res);

		}

		list_for_each_entry(root_res, &info->resources, list)

			printk(KERN_DEBUG "bus: %02x %pR\n",

				       busnum, &root_res->res);

	}



	return 0;

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