From 6aa4cdd07139ba4d5b89139b0070d795cc4dea88 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Fri, 13 Jan 2006 16:02:15 +0100 Subject: [PATCH] PCI hotplug: convert semaphores to mutex semaphore to mutex conversion. the conversion was generated via scripts, and the result was validated automatically via a script as well. build tested with allyesconfig. Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- drivers/pci/hotplug/acpiphp_glue.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'drivers/pci/hotplug/acpiphp_glue.c') diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index 509a5b3ae998..4e25d9c7cc39 100644 --- a/drivers/pci/hotplug/acpiphp_glue.c +++ b/drivers/pci/hotplug/acpiphp_glue.c @@ -46,7 +46,7 @@ #include #include #include -#include +#include #include "../pci.h" #include "pci_hotplug.h" @@ -188,7 +188,7 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) slot->device = device; slot->sun = sun; INIT_LIST_HEAD(&slot->funcs); - init_MUTEX(&slot->crit_sect); + mutex_init(&slot->crit_sect); slot->next = bridge->slots; bridge->slots = slot; @@ -1401,7 +1401,7 @@ int acpiphp_enable_slot(struct acpiphp_slot *slot) { int retval; - down(&slot->crit_sect); + mutex_lock(&slot->crit_sect); /* wake up all functions */ retval = power_on_slot(slot); @@ -1413,7 +1413,7 @@ int acpiphp_enable_slot(struct acpiphp_slot *slot) retval = enable_device(slot); err_exit: - up(&slot->crit_sect); + mutex_unlock(&slot->crit_sect); return retval; } @@ -1424,7 +1424,7 @@ int acpiphp_disable_slot(struct acpiphp_slot *slot) { int retval = 0; - down(&slot->crit_sect); + mutex_lock(&slot->crit_sect); /* unconfigure all functions */ retval = disable_device(slot); @@ -1437,7 +1437,7 @@ int acpiphp_disable_slot(struct acpiphp_slot *slot) goto err_exit; err_exit: - up(&slot->crit_sect); + mutex_unlock(&slot->crit_sect); return retval; } -- cgit v1.2.1 From 15a1ae74879925d0d3f71ebc3f56d0a2c5db393a Mon Sep 17 00:00:00 2001 From: Kristen Accardi Date: Thu, 23 Feb 2006 17:55:58 -0800 Subject: [PATCH] acpiphp: add new bus to acpi If we add a new bridge with subordinate busses, we should call make sure that acpi is notified so that the PRT (if present) can be read and drivers who have registered on this bus will be notified when it is started. Also make sure to use the max reserved bus number for the starting the bus scan. Signed-off-by: Kristen Carlson Accardi Signed-off-by: Greg Kroah-Hartman --- drivers/pci/hotplug/acpiphp_glue.c | 111 ++++++++++++++++++++++++++++++++++++- 1 file changed, 109 insertions(+), 2 deletions(-) (limited to 'drivers/pci/hotplug/acpiphp_glue.c') diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index 4e25d9c7cc39..fe0a6b7662f7 100644 --- a/drivers/pci/hotplug/acpiphp_glue.c +++ b/drivers/pci/hotplug/acpiphp_glue.c @@ -751,6 +751,106 @@ static int power_off_slot(struct acpiphp_slot *slot) } + +/** + * acpiphp_max_busnr - return the highest reserved bus number under + * the given bus. + * @bus: bus to start search with + * + */ +static unsigned char acpiphp_max_busnr(struct pci_bus *bus) +{ + struct list_head *tmp; + unsigned char max, n; + + /* + * pci_bus_max_busnr will return the highest + * reserved busnr for all these children. + * that is equivalent to the bus->subordinate + * value. We don't want to use the parent's + * bus->subordinate value because it could have + * padding in it. + */ + max = bus->secondary; + + list_for_each(tmp, &bus->children) { + n = pci_bus_max_busnr(pci_bus_b(tmp)); + if (n > max) + max = n; + } + return max; +} + + + +/** + * get_func - get a pointer to acpiphp_func given a slot, device + * @slot: slot to search + * @dev: pci_dev struct to match. + * + * This function will increase the reference count of pci_dev, + * so callers should call pci_dev_put when complete. + * + */ +static struct acpiphp_func * +get_func(struct acpiphp_slot *slot, struct pci_dev *dev) +{ + struct acpiphp_func *func = NULL; + struct pci_bus *bus = slot->bridge->pci_bus; + struct pci_dev *pdev; + + list_for_each_entry(func, &slot->funcs, sibling) { + pdev = pci_get_slot(bus, PCI_DEVFN(slot->device, + func->function)); + if (pdev) { + if (pdev == dev) + break; + pci_dev_put(pdev); + } + } + return func; +} + + +/** + * acpiphp_bus_add - add a new bus to acpi subsystem + * @func: acpiphp_func of the bridge + * + */ +static int acpiphp_bus_add(struct acpiphp_func *func) +{ + acpi_handle phandle; + struct acpi_device *device, *pdevice; + int ret_val; + + acpi_get_parent(func->handle, &phandle); + if (acpi_bus_get_device(phandle, &pdevice)) { + dbg("no parent device, assuming NULL\n"); + pdevice = NULL; + } + if (acpi_bus_get_device(func->handle, &device)) { + ret_val = acpi_bus_add(&device, pdevice, func->handle, + ACPI_BUS_TYPE_DEVICE); + if (ret_val) { + dbg("error adding bus, %x\n", + -ret_val); + goto acpiphp_bus_add_out; + } + } + /* + * try to start anyway. We could have failed to add + * simply because this bus had previously been added + * on another add. Don't bother with the return value + * we just keep going. + */ + ret_val = acpi_bus_start(device); + +acpiphp_bus_add_out: + return ret_val; +} + + + /** * enable_device - enable, configure a slot * @slot: slot to be enabled @@ -788,7 +888,7 @@ static int enable_device(struct acpiphp_slot *slot) goto err_exit; } - max = bus->secondary; + max = acpiphp_max_busnr(bus); for (pass = 0; pass < 2; pass++) { list_for_each_entry(dev, &bus->devices, bus_list) { if (PCI_SLOT(dev->devfn) != slot->device) @@ -796,8 +896,15 @@ static int enable_device(struct acpiphp_slot *slot) if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) { max = pci_scan_bridge(bus, dev, max, pass); - if (pass && dev->subordinate) + if (pass && dev->subordinate) { pci_bus_size_bridges(dev->subordinate); + func = get_func(slot, dev); + if (func) { + acpiphp_bus_add(func); + /* side effect of get_func */ + pci_dev_put(dev); + } + } } } } -- cgit v1.2.1 From 20416ea54087c25502d6fb973b8e119973e16341 Mon Sep 17 00:00:00 2001 From: Kristen Accardi Date: Thu, 23 Feb 2006 17:56:03 -0800 Subject: [PATCH] acpiphp: add dock event handling These patches add generic dock event handling to acpiphp. If there are pci devices that need to be inserted/removed after the dock event, the event notification will be handed down to the normal pci hotplug event handler in acpiphp so that new bridges/devices can be enumerated. Because some dock stations do not have pci bridges or pci devices that need to be inserted after a dock, acpiphp will remain loaded to handle dock events even if no hotpluggable pci slots are discovered. You probably need to have the pci=assign-busses kernel parameter enabled to use these patches, and you may not allow ibm_acpi to handle docking notifications and use this patch. This patch incorporates feedback provided by many. Signed-off-by: Kristen Carlson Accardi Signed-off-by: Greg Kroah-Hartman --- drivers/pci/hotplug/acpiphp_glue.c | 85 ++++++++++++++++++++++++++++---------- 1 file changed, 63 insertions(+), 22 deletions(-) (limited to 'drivers/pci/hotplug/acpiphp_glue.c') diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index fe0a6b7662f7..22d0f1cf1362 100644 --- a/drivers/pci/hotplug/acpiphp_glue.c +++ b/drivers/pci/hotplug/acpiphp_glue.c @@ -57,7 +57,6 @@ static LIST_HEAD(bridge_list); #define MY_NAME "acpiphp_glue" static void handle_hotplug_event_bridge (acpi_handle, u32, void *); -static void handle_hotplug_event_func (acpi_handle, u32, void *); static void acpiphp_sanitize_bus(struct pci_bus *bus); static void acpiphp_set_hpp_values(acpi_handle handle, struct pci_bus *bus); @@ -125,6 +124,7 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) struct acpiphp_bridge *bridge = (struct acpiphp_bridge *)context; struct acpiphp_slot *slot; struct acpiphp_func *newfunc; + struct dependent_device *dd; acpi_handle tmp; acpi_status status = AE_OK; unsigned long adr, sun; @@ -138,7 +138,7 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) status = acpi_get_handle(handle, "_EJ0", &tmp); - if (ACPI_FAILURE(status)) + if (ACPI_FAILURE(status) && !(is_dependent_device(handle))) return AE_OK; device = (adr >> 16) & 0xffff; @@ -152,7 +152,8 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) INIT_LIST_HEAD(&newfunc->sibling); newfunc->handle = handle; newfunc->function = function; - newfunc->flags = FUNC_HAS_EJ0; + if (ACPI_SUCCESS(status)) + newfunc->flags = FUNC_HAS_EJ0; if (ACPI_SUCCESS(acpi_get_handle(handle, "_STA", &tmp))) newfunc->flags |= FUNC_HAS_STA; @@ -163,6 +164,19 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) if (ACPI_SUCCESS(acpi_get_handle(handle, "_PS3", &tmp))) newfunc->flags |= FUNC_HAS_PS3; + if (ACPI_SUCCESS(acpi_get_handle(handle, "_DCK", &tmp))) { + newfunc->flags |= FUNC_HAS_DCK; + /* add to devices dependent on dock station, + * because this may actually be the dock bridge + */ + dd = alloc_dependent_device(handle); + if (!dd) + err("Can't allocate memory for " + "new dependent device!\n"); + else + add_dependent_device(dd); + } + status = acpi_evaluate_integer(handle, "_SUN", NULL, &sun); if (ACPI_FAILURE(status)) sun = -1; @@ -210,18 +224,35 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) slot->flags |= (SLOT_ENABLED | SLOT_POWEREDON); } + /* if this is a device dependent on a dock station, + * associate the acpiphp_func to the dependent_device + * struct. + */ + if ((dd = get_dependent_device(handle))) { + newfunc->flags |= FUNC_IS_DD; + /* + * we don't want any devices which is dependent + * on the dock to have it's _EJ0 method executed. + * because we need to run _DCK first. + */ + newfunc->flags &= ~FUNC_HAS_EJ0; + dd->func = newfunc; + add_pci_dependent_device(dd); + } + /* install notify handler */ - status = acpi_install_notify_handler(handle, + if (!(newfunc->flags & FUNC_HAS_DCK)) { + status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, handle_hotplug_event_func, newfunc); - if (ACPI_FAILURE(status)) { - err("failed to register interrupt notify handler\n"); - return status; - } + if (ACPI_FAILURE(status)) + err("failed to register interrupt notify handler\n"); + } else + status = AE_OK; - return AE_OK; + return status; } @@ -410,7 +441,8 @@ find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) goto out; /* check if this bridge has ejectable slots */ - if (detect_ejectable_slots(handle) > 0) { + if ((detect_ejectable_slots(handle) > 0) || + (detect_dependent_devices(handle) > 0)) { dbg("found PCI-to-PCI bridge at PCI %s\n", pci_name(dev)); add_p2p_bridge(handle, dev); } @@ -512,11 +544,13 @@ static void cleanup_bridge(struct acpiphp_bridge *bridge) list_for_each_safe (list, tmp, &slot->funcs) { struct acpiphp_func *func; func = list_entry(list, struct acpiphp_func, sibling); - status = acpi_remove_notify_handler(func->handle, + if (!(func->flags & FUNC_HAS_DCK)) { + status = acpi_remove_notify_handler(func->handle, ACPI_SYSTEM_NOTIFY, handle_hotplug_event_func); - if (ACPI_FAILURE(status)) - err("failed to remove notify handler\n"); + if (ACPI_FAILURE(status)) + err("failed to remove notify handler\n"); + } pci_dev_put(func->pci_dev); list_del(list); kfree(func); @@ -828,14 +862,21 @@ static int acpiphp_bus_add(struct acpiphp_func *func) dbg("no parent device, assuming NULL\n"); pdevice = NULL; } - if (acpi_bus_get_device(func->handle, &device)) { - ret_val = acpi_bus_add(&device, pdevice, func->handle, - ACPI_BUS_TYPE_DEVICE); - if (ret_val) { - dbg("error adding bus, %x\n", - -ret_val); - goto acpiphp_bus_add_out; - } + if (!acpi_bus_get_device(func->handle, &device)) { + dbg("bus exists... trim\n"); + /* this shouldn't be in here, so remove + * the bus then re-add it... + */ + ret_val = acpi_bus_trim(device, 1); + dbg("acpi_bus_trim return %x\n", ret_val); + } + + ret_val = acpi_bus_add(&device, pdevice, func->handle, + ACPI_BUS_TYPE_DEVICE); + if (ret_val) { + dbg("error adding bus, %x\n", + -ret_val); + goto acpiphp_bus_add_out; } /* * try to start anyway. We could have failed to add @@ -1307,7 +1348,7 @@ static void handle_hotplug_event_bridge(acpi_handle handle, u32 type, void *cont * handles ACPI event notification on slots * */ -static void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context) +void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context) { struct acpiphp_func *func; char objname[64]; -- cgit v1.2.1 From e27da3814170385a4d2797397d706e554635812d Mon Sep 17 00:00:00 2001 From: MUNEDA Takahiro Date: Thu, 23 Feb 2006 17:56:08 -0800 Subject: [PATCH] acpiphp - slot management fix - V4 o This patch removes IDs (for slots management). o This patch removes the slot register/unregister processes from the init/exit phases. Instead, adds these processes in the bridge add/cleanup phases. o Currently, this change doesn't have any meanings. But these changes are needed to support p2p bridge(with hotplug slot) Signed-off-by: MUNEDA Takahiro Signed-off-by: Kristen Carlson Accardi Signed-off-by: Greg Kroah-Hartman --- drivers/pci/hotplug/acpiphp_glue.c | 48 ++++++++++++++++++-------------------- 1 file changed, 23 insertions(+), 25 deletions(-) (limited to 'drivers/pci/hotplug/acpiphp_glue.c') diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index 22d0f1cf1362..dbfdac63cb49 100644 --- a/drivers/pci/hotplug/acpiphp_glue.c +++ b/drivers/pci/hotplug/acpiphp_glue.c @@ -128,8 +128,7 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) acpi_handle tmp; acpi_status status = AE_OK; unsigned long adr, sun; - int device, function; - static int num_slots = 0; /* XXX if we support I/O node hotplug... */ + int device, function, retval; status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr); @@ -198,7 +197,6 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) memset(slot, 0, sizeof(struct acpiphp_slot)); slot->bridge = bridge; - slot->id = num_slots++; slot->device = device; slot->sun = sun; INIT_LIST_HEAD(&slot->funcs); @@ -212,6 +210,11 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) dbg("found ACPI PCI Hotplug slot %d at PCI %04x:%02x:%02x\n", slot->sun, pci_domain_nr(bridge->pci_bus), bridge->pci_bus->number, slot->device); + retval = acpiphp_register_hotplug_slot(slot); + if (retval) { + warn("acpiphp_register_hotplug_slot failed(err code = 0x%x)\n", retval); + goto err_exit; + } } newfunc->slot = slot; @@ -253,6 +256,14 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) status = AE_OK; return status; + + err_exit: + bridge->nr_slots--; + bridge->slots = slot->next; + kfree(slot); + kfree(newfunc); + + return AE_OK; } @@ -335,9 +346,16 @@ static void init_bridge_misc(struct acpiphp_bridge *bridge) /* decode ACPI 2.0 _HPP (hot plug parameters) */ decode_hpp(bridge); + /* must be added to the list prior to calling register_slot */ + list_add(&bridge->list, &bridge_list); + /* register all slot objects under this bridge */ status = acpi_walk_namespace(ACPI_TYPE_DEVICE, bridge->handle, (u32)1, register_slot, bridge, NULL); + if (ACPI_FAILURE(status)) { + list_del(&bridge->list); + return; + } /* install notify handler */ if (bridge->type != BRIDGE_TYPE_HOST) { @@ -350,8 +368,6 @@ static void init_bridge_misc(struct acpiphp_bridge *bridge) err("failed to register interrupt notify handler\n"); } } - - list_add(&bridge->list, &bridge_list); } @@ -555,6 +571,8 @@ static void cleanup_bridge(struct acpiphp_bridge *bridge) list_del(list); kfree(func); } + acpiphp_unregister_hotplug_slot(slot); + list_del(&slot->funcs); kfree(slot); slot = next; } @@ -1521,26 +1539,6 @@ static int acpiphp_for_each_slot(acpiphp_callback fn, void *data) } #endif -/* search matching slot from id */ -struct acpiphp_slot *get_slot_from_id(int id) -{ - struct list_head *node; - struct acpiphp_bridge *bridge; - struct acpiphp_slot *slot; - - list_for_each (node, &bridge_list) { - bridge = (struct acpiphp_bridge *)node; - for (slot = bridge->slots; slot; slot = slot->next) - if (slot->id == id) - return slot; - } - - /* should never happen! */ - err("%s: no object for id %d\n", __FUNCTION__, id); - WARN_ON(1); - return NULL; -} - /** * acpiphp_enable_slot - power on slot -- cgit v1.2.1 From 0cccd0c20677e8a9da40018632f1b6c487ba2bd5 Mon Sep 17 00:00:00 2001 From: MUNEDA Takahiro Date: Fri, 24 Feb 2006 17:46:04 +0900 Subject: [PATCH] acpiphp: fix bridge handle When hotplug slot is under the host bridge, DEVICE_ACPI_HANDLE(&bus->self->dev) fails since '&bus->self' was not set. This patch fixes it. This patch is based on kristen's latest patches. I tested this patch on my Tiger4. Signed-off-by: MUNEDA Takahiro Signed-off-by: Greg Kroah-Hartman --- drivers/pci/hotplug/acpiphp_glue.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/pci/hotplug/acpiphp_glue.c') diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index dbfdac63cb49..21fa13e84470 100644 --- a/drivers/pci/hotplug/acpiphp_glue.c +++ b/drivers/pci/hotplug/acpiphp_glue.c @@ -972,8 +972,8 @@ static int enable_device(struct acpiphp_slot *slot) acpiphp_sanitize_bus(bus); pci_enable_bridges(bus); pci_bus_add_devices(bus); - acpiphp_set_hpp_values(DEVICE_ACPI_HANDLE(&bus->self->dev), bus); - acpiphp_configure_ioapics(DEVICE_ACPI_HANDLE(&bus->self->dev)); + acpiphp_set_hpp_values(slot->bridge->handle, bus); + acpiphp_configure_ioapics(slot->bridge->handle); /* associate pci_dev to our representation */ list_for_each (l, &slot->funcs) { -- cgit v1.2.1 From 7c8f25da12a3dda46fb730699582895d5fc51287 Mon Sep 17 00:00:00 2001 From: Kenji Kaneshige Date: Mon, 27 Feb 2006 22:15:49 +0900 Subject: [PATCH] acpiphp: Scan slots under the nested P2P bridge Current ACPIPHP driver scans only slots under the top level PCI-to-PCI bridge. So hotplug PCI slots under the nested PCI-to-PCI bridge would not be detected. For example, if the system has the ACPI namespace like below, hotplug slots woule not be detected. Device (PCI0) { /* Root bridge */ Name (_HID, "PNP0A03") Device (P2PA) { /* PCI-to-PCI bridge */ Name (_ADR, ...) Device (P2PB) { /* PCI-to-PCI bridge */ Name (_ADR, ...) Device (S0F0) { /* hotplug slot */ Name (_ADR, ...) Name (_SUN, ...) Method (_EJ0, ...) { ... } } ... Device (S0F7) { /* hotplug slot */ Name (_ADR, ...) Name (_SUN, ...) Method (_EJ0, ...) { ... } } Device (S1F0) { /* hotplug slot */ Name (_ADR, ...) Name (_SUN, ...) Method (_EJ0, ...) { ... } } ... } } } This patch fixes this issue. Signed-off-by: Kenji Kaneshige Signed-off-by: Greg Kroah-Hartman --- drivers/pci/hotplug/acpiphp_glue.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'drivers/pci/hotplug/acpiphp_glue.c') diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index 21fa13e84470..cbd5893d198e 100644 --- a/drivers/pci/hotplug/acpiphp_glue.c +++ b/drivers/pci/hotplug/acpiphp_glue.c @@ -463,6 +463,12 @@ find_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv) add_p2p_bridge(handle, dev); } + /* search P2P bridges under this p2p bridge */ + status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, (u32)1, + find_p2p_bridge, dev->subordinate, NULL); + if (ACPI_FAILURE(status)) + warn("find_p2p_bridge faied (error code = 0x%x)\n", status); + out: pci_dev_put(dev); return AE_OK; @@ -603,7 +609,8 @@ static void remove_bridge(acpi_handle handle) } else { /* clean-up p2p bridges under this host bridge */ acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, - (u32)1, cleanup_p2p_bridge, NULL, NULL); + ACPI_UINT32_MAX, cleanup_p2p_bridge, + NULL, NULL); } } -- cgit v1.2.1 From f5afe8064f3087bead8fea7e32547c2a3ada5fd0 Mon Sep 17 00:00:00 2001 From: Eric Sesterhenn Date: Tue, 28 Feb 2006 15:34:49 +0100 Subject: [PATCH] PCI: kzalloc() conversion in drivers/pci this patch converts drivers/pci to kzalloc usage. Compile tested with allyes config. Signed-off-by: Eric Sesterhenn Signed-off-by: Greg Kroah-Hartman --- drivers/pci/hotplug/acpiphp_glue.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-) (limited to 'drivers/pci/hotplug/acpiphp_glue.c') diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index cbd5893d198e..c7e6387983df 100644 --- a/drivers/pci/hotplug/acpiphp_glue.c +++ b/drivers/pci/hotplug/acpiphp_glue.c @@ -143,10 +143,9 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) device = (adr >> 16) & 0xffff; function = adr & 0xffff; - newfunc = kmalloc(sizeof(struct acpiphp_func), GFP_KERNEL); + newfunc = kzalloc(sizeof(struct acpiphp_func), GFP_KERNEL); if (!newfunc) return AE_NO_MEMORY; - memset(newfunc, 0, sizeof(struct acpiphp_func)); INIT_LIST_HEAD(&newfunc->sibling); newfunc->handle = handle; @@ -189,13 +188,12 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) } if (!slot) { - slot = kmalloc(sizeof(struct acpiphp_slot), GFP_KERNEL); + slot = kzalloc(sizeof(struct acpiphp_slot), GFP_KERNEL); if (!slot) { kfree(newfunc); return AE_NO_MEMORY; } - memset(slot, 0, sizeof(struct acpiphp_slot)); slot->bridge = bridge; slot->device = device; slot->sun = sun; @@ -376,12 +374,10 @@ static void add_host_bridge(acpi_handle *handle, struct pci_bus *pci_bus) { struct acpiphp_bridge *bridge; - bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); + bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); if (bridge == NULL) return; - memset(bridge, 0, sizeof(struct acpiphp_bridge)); - bridge->type = BRIDGE_TYPE_HOST; bridge->handle = handle; @@ -398,14 +394,12 @@ static void add_p2p_bridge(acpi_handle *handle, struct pci_dev *pci_dev) { struct acpiphp_bridge *bridge; - bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); + bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL); if (bridge == NULL) { err("out of memory\n"); return; } - memset(bridge, 0, sizeof(struct acpiphp_bridge)); - bridge->type = BRIDGE_TYPE_P2P; bridge->handle = handle; -- cgit v1.2.1 From 783c49fc506d9afe4784390b556fa25ede5d6d1f Mon Sep 17 00:00:00 2001 From: Kristen Accardi Date: Fri, 3 Mar 2006 10:16:05 -0800 Subject: [PATCH] PCI Hotplug: add common acpi functions to core shpchprm_acpi.c and pciehprm_acpi.c are nearly identical. In addition, there are functions in both these files that are also in acpiphp_glue.c. This patch will remove duplicate functions from shpchp, pciehp, and acpiphp and move this functionality to pci_hotplug, as it is not hardware specific. Get rid of shpchprm* and pciehprm* files since they are no longer needed. shpchprm_nonacpi.c and pciehprm_nonacpi.c are identical, as well as shpchprm_legacy.c and can be replaced with a macro. This patch also changes acpiphp to use the common hpp code. Signed-off-by: Kristen Carlson Accardi Signed-off-by: Greg Kroah-Hartman --- drivers/pci/hotplug/acpiphp_glue.c | 91 ++++++-------------------------------- 1 file changed, 13 insertions(+), 78 deletions(-) (limited to 'drivers/pci/hotplug/acpiphp_glue.c') diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index c7e6387983df..053ee843863c 100644 --- a/drivers/pci/hotplug/acpiphp_glue.c +++ b/drivers/pci/hotplug/acpiphp_glue.c @@ -285,57 +285,19 @@ static int detect_ejectable_slots(acpi_handle *bridge_handle) static void decode_hpp(struct acpiphp_bridge *bridge) { acpi_status status; - struct acpi_buffer buffer = { .length = ACPI_ALLOCATE_BUFFER, - .pointer = NULL}; - union acpi_object *package; - int i; - - /* default numbers */ - bridge->hpp.cache_line_size = 0x10; - bridge->hpp.latency_timer = 0x40; - bridge->hpp.enable_SERR = 0; - bridge->hpp.enable_PERR = 0; - - status = acpi_evaluate_object(bridge->handle, "_HPP", NULL, &buffer); + status = acpi_get_hp_params_from_firmware(bridge->pci_dev, &bridge->hpp); if (ACPI_FAILURE(status)) { - dbg("_HPP evaluation failed\n"); - return; - } - - package = (union acpi_object *) buffer.pointer; - - if (!package || package->type != ACPI_TYPE_PACKAGE || - package->package.count != 4 || !package->package.elements) { - err("invalid _HPP object; ignoring\n"); - goto err_exit; + /* use default numbers */ + bridge->hpp.cache_line_size = 0x10; + bridge->hpp.latency_timer = 0x40; + bridge->hpp.enable_serr = 0; + bridge->hpp.enable_perr = 0; } - - for (i = 0; i < 4; i++) { - if (package->package.elements[i].type != ACPI_TYPE_INTEGER) { - err("invalid _HPP parameter type; ignoring\n"); - goto err_exit; - } - } - - bridge->hpp.cache_line_size = package->package.elements[0].integer.value; - bridge->hpp.latency_timer = package->package.elements[1].integer.value; - bridge->hpp.enable_SERR = package->package.elements[2].integer.value; - bridge->hpp.enable_PERR = package->package.elements[3].integer.value; - - dbg("_HPP parameter = (%02x, %02x, %02x, %02x)\n", - bridge->hpp.cache_line_size, - bridge->hpp.latency_timer, - bridge->hpp.enable_SERR, - bridge->hpp.enable_PERR); - - bridge->flags |= BRIDGE_HAS_HPP; - - err_exit: - kfree(buffer.pointer); } + /* initialize miscellaneous stuff for both root and PCI-to-PCI bridge */ static void init_bridge_misc(struct acpiphp_bridge *bridge) { @@ -1154,11 +1116,11 @@ static void program_hpp(struct pci_dev *dev, struct acpiphp_bridge *bridge) pci_write_config_byte(dev, PCI_LATENCY_TIMER, bridge->hpp.latency_timer); pci_read_config_word(dev, PCI_COMMAND, &pci_cmd); - if (bridge->hpp.enable_SERR) + if (bridge->hpp.enable_serr) pci_cmd |= PCI_COMMAND_SERR; else pci_cmd &= ~PCI_COMMAND_SERR; - if (bridge->hpp.enable_PERR) + if (bridge->hpp.enable_perr) pci_cmd |= PCI_COMMAND_PARITY; else pci_cmd &= ~PCI_COMMAND_PARITY; @@ -1169,11 +1131,11 @@ static void program_hpp(struct pci_dev *dev, struct acpiphp_bridge *bridge) pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, bridge->hpp.latency_timer); pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &pci_bctl); - if (bridge->hpp.enable_SERR) + if (bridge->hpp.enable_serr) pci_bctl |= PCI_BRIDGE_CTL_SERR; else pci_bctl &= ~PCI_BRIDGE_CTL_SERR; - if (bridge->hpp.enable_PERR) + if (bridge->hpp.enable_perr) pci_bctl |= PCI_BRIDGE_CTL_PARITY; else pci_bctl &= ~PCI_BRIDGE_CTL_PARITY; @@ -1193,6 +1155,7 @@ static void acpiphp_set_hpp_values(acpi_handle handle, struct pci_bus *bus) memset(&bridge, 0, sizeof(bridge)); bridge.handle = handle; + bridge.pci_dev = bus->self; decode_hpp(&bridge); list_for_each_entry(dev, &bus->devices, bus_list) program_hpp(dev, &bridge); @@ -1409,41 +1372,13 @@ void handle_hotplug_event_func(acpi_handle handle, u32 type, void *context) } } -static int is_root_bridge(acpi_handle handle) -{ - acpi_status status; - struct acpi_device_info *info; - struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; - int i; - - status = acpi_get_object_info(handle, &buffer); - if (ACPI_SUCCESS(status)) { - info = buffer.pointer; - if ((info->valid & ACPI_VALID_HID) && - !strcmp(PCI_ROOT_HID_STRING, - info->hardware_id.value)) { - acpi_os_free(buffer.pointer); - return 1; - } - if (info->valid & ACPI_VALID_CID) { - for (i=0; i < info->compatibility_id.count; i++) { - if (!strcmp(PCI_ROOT_HID_STRING, - info->compatibility_id.id[i].value)) { - acpi_os_free(buffer.pointer); - return 1; - } - } - } - } - return 0; -} static acpi_status find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) { int *count = (int *)context; - if (is_root_bridge(handle)) { + if (acpi_root_bridge(handle)) { acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, handle_hotplug_event_bridge, NULL); (*count)++; -- cgit v1.2.1