PCI, ACPI: Physical PCI slot objects
Subsystems (8)
Hi Andrew, Jesse,
This is v15 of the physical PCI slot series.
v14 -> v15
- reintroduce pci-hotplug-core-add-check-of-duplicate-slot-name a86161b3134465f072d965ca7508ec9c1e2e52c7
- fold kobject-Export-kobject_rename-for-pci_hotplug_core into patch 3/3 to reduce commit log noise (as suggested by akpm). The -mm file name is:
acpi-pci-slot-detection-driver-fix.patch
I tried to edit the commit-logs as best I could for proper attribution, copying what I *think* is akpm's style. Please let me know if I messed up here.
This series is based on the most recent linux-next tree, and thanks to BenH's Acked-by, I think we're finally ready for Linus' tree (pending one final ACK from Kenji-san).
Thanks,
/ac
PATCH 1/3 Construct one fakephp slot per PCI slot
Register one slot per slot, rather than one slot per function. Change the name of the slot to fake%d instead of the pci address.
Signed-off-by Alex Chiang <[email protected]>
Signed-off-by Matthew Wilcox <[email protected]>
Cc Greg KH <[email protected]>
Cc Kristen Carlson Accardi <[email protected]>
Cc Len Brown <[email protected]>
Cc Kenji Kaneshige <[email protected]>
Signed-off-by Andrew Morton <[email protected]>
--- drivers/pci/hotplug/fakephp.c | 90 ++++++++++++++--------------------------- 1 files changed, 30 insertions(+), 60 deletions(-)
drivers/pci/hotplug/fakephp.c +30 -60
@@ -66,6 +66,7 @@ struct dummy_slot {struct pci_dev *dev;struct work_struct remove_work;unsigned long removed; +char name[8 ]; };static int debug;
@@ -101,6 +102,7 @@ static int add_slot(struct pci_dev *dev)struct dummy_slot *dslot;struct hotplug_slot *slot;int retval = -ENOMEM ; +static int count =1 ; slot =kzalloc (sizeof (struct hotplug_slot ),GFP_KERNEL );if (!slot)
@@ -114,15 +116,13 @@ static int add_slot(struct pci_dev *dev) slot->info->max_bus_speed =PCI_SPEED_UNKNOWN ; slot->info->cur_bus_speed =PCI_SPEED_UNKNOWN ; - slot->name =kstrdup (dev_name (&dev->dev),GFP_KERNEL ); -if (!slot->name) - goto error_info; -dbg ("slot->name = %s\n" , slot->name); - dslot =kzalloc (sizeof (struct dummy_slot ),GFP_KERNEL );if (!dslot) - goto error_name; + goto error_info; + slot->name = dslot->name; +snprintf (slot->name,sizeof (dslot->name),"fake%d" , count++); +dbg ("slot->name = %s\n" , slot->name); slot->ops = &dummy_hotplug_slot_ops; slot->release = &dummy_release; slot->private = dslot;
@@ -140,8 +140,6 @@ static int add_slot(struct pci_dev *dev) error_dslot:kfree (dslot); -error_name: -kfree (slot->name); error_info:kfree (slot->info); error_slot:
@@ -153,17 +151,17 @@ error:static int __init pci_scan_buses (void ) {struct pci_dev *dev =NULL ; -int retval =0 ; +int lastslot =0 ;while ((dev =pci_get_device (PCI_ANY_ID ,PCI_ANY_ID , dev)) !=NULL ) { - retval =add_slot (dev); -if (retval) { -pci_dev_put (dev); -break ; - } +if (PCI_FUNC (dev->devfn) >0 && + lastslot ==PCI_SLOT (dev->devfn)) +continue ; + lastslot =PCI_SLOT (dev->devfn); +add_slot (dev); } -return retval; +return 0 ; }static void remove_slot (struct dummy_slot *dslot)
@@ -301,23 +299,9 @@ static int enable_slot(struct hotplug_slot *hotplug_slot)return 0 ; } -/* find the hotplug_slot for the pci_dev */ -static struct hotplug_slot *get_slot_from_dev (struct pci_dev *dev) -{ -struct dummy_slot *dslot; - -list_for_each_entry (dslot, &slot_list, node) { -if (dslot->dev == dev) -return dslot->slot; - } -return NULL ; -} - -static int disable_slot (struct hotplug_slot *slot) {struct dummy_slot *dslot; -struct hotplug_slot *hslot;struct pci_dev *dev;int func;
@@ -327,41 +311,27 @@ static int disable_slot(struct hotplug_slot *slot)dbg ("%s - physical_slot = %s\n" , __func__, slot->name); -/* don't disable bridged devices just yet, we can't handle them easily... */ -if (dslot->dev->subordinate) { -err ("Can't remove PCI devices with other PCI devices behind it yet.\n" ); -return -ENODEV ; - } -if (test_and_set_bit (0 , &dslot->removed)) { -dbg ("Slot already scheduled for removal\n" ); -return -ENODEV ; - } -/* search for subfunctions and disable them first */ -if (!(dslot->dev->devfn &7 )) { -for (func =1 ; func <8 ; func++) { - dev =pci_get_slot (dslot->dev->bus, - dslot->dev->devfn + func); -if (dev) { - hslot =get_slot_from_dev (dev); -if (hslot) -disable_slot (hslot); -else { -err ("Hotplug slot not found for subfunction of PCI device\n" ); -return -ENODEV ; - } -pci_dev_put (dev); - }else -dbg ("No device in slot found\n" ); +for (func =7 ; func >=0 ; func--) { + dev =pci_get_slot (dslot->dev->bus, dslot->dev->devfn + func); +if (!dev) +continue ; + +if (test_and_set_bit (0 , &dslot->removed)) { +dbg ("Slot already scheduled for removal\n" ); +return -ENODEV ; } - } -/* remove the device from the pci core */ -pci_remove_bus_device (dslot->dev); +/* queue work item to blow away this sysfs entry and other +* parts. +*/ +INIT_WORK (&dslot->remove_work, remove_slot_worker); +queue_work (dummyphp_wq, &dslot->remove_work); -/* queue work item to blow away this sysfs entry and other parts. */ -INIT_WORK (&dslot->remove_work, remove_slot_worker); -queue_work (dummyphp_wq, &dslot->remove_work); +/* blow away this sysfs entry and other parts. */ +remove_slot (dslot); +pci_dev_put (dev); + }return 0 ; }
Signature · 1 line
1.5.3.1.1.g1e61
PATCH 2/3 Introduce pci_slot
In reply to Alex ChiangCurrently, /sys/bus/pci/slots/ only exposes hotplug attributes when a hotplug driver is loaded, but PCI slots have attributes such as address, speed, width, etc. that are not related to hotplug at all.
Introduce pci_slot as the primary data structure and kobject model. Hotplug attributes described in hotplug_slot become a secondary structure associated with the pci_slot.
This patch only creates the infrastructure that allows the separation of PCI slot attributes and hotplug attributes. In this patch, the PCI hotplug core remains the only user of this infrastructure, and thus, /sys/bus/pci/slots/ will still only become populated when a hotplug driver is loaded.
A later patch in this series will add a second user of this new infrastructure and demonstrate splitting the task of exposing pci_slot attributes from hotplug_slot attributes.
- Make pci_slot the primary sysfs entity. hotplug_slot becomes a subsidiary structure.
o pci_create_slot() creates and registers a slot with the PCI core
o pci_slot_add_hotplug() gives it hotplug capability
- Change the prototype of pci_hp_register() to take the bus and slot number (on parent bus) as parameters.
- Remove all the ->get_address methods since this functionality is now handled by pci_slot directly.
[[email protected]: rpaphp-correctly-pci_hp_register-for-empty-pci-slots]
Tested-by Badari Pulavarty <[email protected]>
[[email protected]: build fix]
[[email protected]: make headers_check happy]
[[email protected]: nuther build fix]
[[email protected]: fix typo in #include]
Signed-off-by Alex Chiang <[email protected]>
Signed-off-by Matthew Wilcox <[email protected]>
Cc Greg KH <[email protected]>
Cc Kristen Carlson Accardi <[email protected]>
Cc Len Brown <[email protected]>
Acked-by Kenji Kaneshige <[email protected]>
Cc Jesse Barnes <[email protected]>
Signed-off-by Andrew Morton <[email protected]>
--- drivers/pci/Makefile | 2 +- drivers/pci/hotplug/acpiphp.h | 1 - drivers/pci/hotplug/acpiphp_core.c | 25 +--- drivers/pci/hotplug/acpiphp_glue.c | 23 +-- drivers/pci/hotplug/acpiphp_ibm.c | 6 +- drivers/pci/hotplug/cpci_hotplug_core.c | 2 +- drivers/pci/hotplug/cpqphp_core.c | 4 +- drivers/pci/hotplug/fakephp.c | 2 +- drivers/pci/hotplug/ibmphp_ebda.c | 3 +- drivers/pci/hotplug/pci_hotplug_core.c | 258 ++++++++++++------------------- drivers/pci/hotplug/pciehp_core.c | 32 ++--- drivers/pci/hotplug/rpadlpar_sysfs.c | 5 +- drivers/pci/hotplug/rpaphp_slot.c | 44 +----- drivers/pci/hotplug/sgi_hotplug.c | 10 +- drivers/pci/hotplug/shpchp_core.c | 20 +-- drivers/pci/pci.h | 13 ++ drivers/pci/probe.c | 1 + drivers/pci/slot.c | 233 ++++++++++++++++++++++++++++ include/linux/pci.h | 19 ++- include/linux/pci_hotplug.h | 12 +- 20 files changed, 422 insertions(+), 293 deletions(-) create mode 100644 drivers/pci/slot.c
drivers/pci/Makefile +1 -1
@@ -2,7 +2,7 @@ # Makefile for the PCI bus specific drivers. # -obj-y += access.o bus.o probe.o remove.o pci.o quirks.o \ +obj-y += access.o bus.o probe.o remove.o pci.o quirks.o slot.o \ pci-driver.o search.o pci-sysfs.o rom.o setup-res.o obj-$(CONFIG_PROC_FS) += proc.o
drivers/pci/hotplug/acpiphp.h +0 -1
@@ -215,7 +215,6 @@ extern u8 acpiphp_get_power_status (struct acpiphp_slot *slot);extern u8 acpiphp_get_attention_status (struct acpiphp_slot *slot);extern u8 acpiphp_get_latch_status (struct acpiphp_slot *slot);extern u8 acpiphp_get_adapter_status (struct acpiphp_slot *slot); -extern u32 acpiphp_get_address (struct acpiphp_slot *slot);/* variables */ extern int acpiphp_debug;
drivers/pci/hotplug/acpiphp_core.c +5 -20
@@ -70,7 +70,6 @@ static int disable_slot (struct hotplug_slot *slot);static int set_attention_status (struct hotplug_slot *slot,u8 value);static int get_power_status (struct hotplug_slot *slot,u8 *value);static int get_attention_status (struct hotplug_slot *slot,u8 *value); -static int get_address (struct hotplug_slot *slot,u32 *value);static int get_latch_status (struct hotplug_slot *slot,u8 *value);static int get_adapter_status (struct hotplug_slot *slot,u8 *value);
@@ -83,7 +82,6 @@ static struct hotplug_slot_ops acpi_hotplug_slot_ops = { .get_attention_status = get_attention_status, .get_latch_status = get_latch_status, .get_adapter_status = get_adapter_status, - .get_address = get_address, };
@@ -274,23 +272,6 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)return 0 ; } - -/** -* get_address - get pci address of a slot -* @hotplug_slot: slot to get status -* @value: pointer to struct pci_busdev (seg, bus, dev) -*/ -static int get_address (struct hotplug_slot *hotplug_slot,u32 *value) -{ -struct slot *slot = hotplug_slot->private; - -dbg ("%s - physical_slot = %s\n" , __func__, hotplug_slot->name); - - *value =acpiphp_get_address (slot->acpi_slot); - -return 0 ; -} -static int __init init_acpi (void ) {int retval;
@@ -357,7 +338,11 @@ int acpiphp_register_hotplug_slot(struct acpiphp_slot *acpiphp_slot) acpiphp_slot->slot = slot;snprintf (slot->name,sizeof (slot->name),"%u" , slot->acpi_slot->sun); - retval =pci_hp_register (slot->hotplug_slot); + retval =pci_hp_register (slot->hotplug_slot, + acpiphp_slot->bridge->pci_bus, + acpiphp_slot->device); +if (retval == -EBUSY ) + goto error_hpslot;if (retval) {err ("pci_hp_register failed with error %d\n" , retval); goto error_hpslot;
drivers/pci/hotplug/acpiphp_glue.c +6 -17
@@ -258,7 +258,12 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) 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); +if (retval == -EBUSY ) +warn ("Slot %d already registered by another " +"hotplug driver\n" , slot->sun); +else +warn ("acpiphp_register_hotplug_slot failed " +"(err code = 0x%x)\n" , retval); goto err_exit; } }
@@ -1867,19 +1872,3 @@ u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot)return (sta ==0 ) ?0 :1 ; } - - -/* -* pci address (seg/bus/dev) -*/ -u32 acpiphp_get_address (struct acpiphp_slot *slot) -{ -u32 address; -struct pci_bus *pci_bus = slot->bridge->pci_bus; - - address = (pci_domain_nr (pci_bus) <<16 ) | - (pci_bus->number <<8 ) | - slot->device; - -return address; -}
drivers/pci/hotplug/acpiphp_ibm.c +4 -2
@@ -33,8 +33,10 @@#include <linux/kobject.h> #include <asm/uaccess.h> #include <linux/moduleparam.h> +#include <linux/pci.h> #include "acpiphp.h" +#include "../pci.h" #define DRIVER_VERSION "1.0.1"#define DRIVER_AUTHOR "Irene Zubarev <[email protected]>, Vernon Mauery <[email protected]>"
@@ -430,7 +432,7 @@ static int __init ibm_acpiphp_init(void)int retval =0 ;acpi_status status;struct acpi_device *device; -struct kobject *sysdir = &pci_hotplug_slots_kset->kobj; +struct kobject *sysdir = &pci_slots_kset->kobj;dbg ("%s\n" , __func__);
@@ -477,7 +479,7 @@ init_return: static void __exit ibm_acpiphp_exit(void) {acpi_status status; -struct kobject *sysdir = &pci_hotplug_slots_kset->kobj; +struct kobject *sysdir = &pci_slots_kset->kobj;dbg ("%s\n" , __func__);
drivers/pci/hotplug/cpci_hotplug_core.c +1 -1
@@ -285,7 +285,7 @@ cpci_hp_register_bus(struct pci_bus *bus, u8 first, u8 last) info->attention_status =cpci_get_attention_status (slot);dbg ("registering slot %s" , slot->hotplug_slot->name); - status =pci_hp_register (slot->hotplug_slot); + status =pci_hp_register (slot->hotplug_slot, bus, i);if (status) {err ("pci_hp_register failed with error %d" , status); goto error_name;
drivers/pci/hotplug/cpqphp_core.c +3 -1
@@ -434,7 +434,9 @@ static int ctrl_slot_setup(struct controller *ctrl, slot->bus, slot->device, slot->number, ctrl->slot_device_offset, slot_number); - result =pci_hp_register (hotplug_slot); + result =pci_hp_register (hotplug_slot, + ctrl->pci_dev->subordinate, + slot->device);if (result) {err ("pci_hp_register failed with error %d\n" , result); goto error_name;
drivers/pci/hotplug/fakephp.c +1 -1
@@ -127,7 +127,7 @@ static int add_slot(struct pci_dev *dev) slot->release = &dummy_release; slot->private = dslot; - retval =pci_hp_register (slot); + retval =pci_hp_register (slot, dev->bus,PCI_SLOT (dev->devfn));if (retval) {err ("pci_hp_register failed with error %d\n" , retval); goto error_dslot;
drivers/pci/hotplug/ibmphp_ebda.c +2 -1
@@ -1001,7 +1001,8 @@ static int __init ebda_rsrc_controller (void) tmp_slot = list_entry (list, struct slot, ibm_slot_list);snprintf (tmp_slot->hotplug_slot->name,30 ,"%s" ,create_file_name (tmp_slot)); -pci_hp_register (tmp_slot->hotplug_slot); +pci_hp_register (tmp_slot->hotplug_slot, +pci_find_bus (0 , tmp_slot->bus), tmp_slot->device); }print_ebda_hpc ();
drivers/pci/hotplug/pci_hotplug_core.c +99 -159
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drivers/pci/hotplug/pciehp_core.c +13 -19
@@ -72,7 +72,6 @@ static int get_power_status (struct hotplug_slot *slot, u8 *value);static int get_attention_status (struct hotplug_slot *slot,u8 *value);static int get_latch_status (struct hotplug_slot *slot,u8 *value);static int get_adapter_status (struct hotplug_slot *slot,u8 *value); -static int get_address (struct hotplug_slot *slot,u32 *value);static int get_max_bus_speed (struct hotplug_slot *slot,enum pci_bus_speed *value);static int get_cur_bus_speed (struct hotplug_slot *slot,enum pci_bus_speed *value);
@@ -85,7 +84,6 @@ static struct hotplug_slot_ops pciehp_hotplug_slot_ops = { .get_attention_status = get_attention_status, .get_latch_status = get_latch_status, .get_adapter_status = get_adapter_status, - .get_address = get_address, .get_max_bus_speed = get_max_bus_speed, .get_cur_bus_speed = get_cur_bus_speed, };
@@ -252,7 +250,9 @@ static int init_slots(struct controller *ctrl)dbg ("Registering bus=%x dev=%x hp_slot=%x sun=%x " "slot_device_offset=%x\n" , slot->bus, slot->device, slot->hp_slot, slot->number, ctrl->slot_device_offset); - retval =pci_hp_register (hotplug_slot); + retval =pci_hp_register (hotplug_slot, + ctrl->pci_dev->subordinate, + slot->device);if (retval) {err ("pci_hp_register failed with error %d\n" , retval);if (retval == -EEXIST )
@@ -263,7 +263,7 @@ static int init_slots(struct controller *ctrl) }/* create additional sysfs entries */ if (EMI (ctrl)) { - retval =sysfs_create_file (&hotplug_slot->kobj, + retval =sysfs_create_file (&hotplug_slot->pci_slot->kobj, &hotplug_slot_attr_lock.attr);if (retval) {pci_hp_deregister (hotplug_slot);
@@ -296,7 +296,7 @@ static void cleanup_slots(struct controller *ctrl) slot = list_entry(tmp, struct slot, slot_list);list_del (&slot->slot_list);if (EMI (ctrl)) -sysfs_remove_file (&slot->hotplug_slot->kobj, +sysfs_remove_file (&slot->hotplug_slot->pci_slot->kobj, &hotplug_slot_attr_lock.attr);cancel_delayed_work (&slot->work);flush_scheduled_work ();
@@ -398,19 +398,8 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)return 0 ; } -static int get_address (struct hotplug_slot *hotplug_slot,u32 *value) -{ -struct slot *slot = hotplug_slot->private; -struct pci_bus *bus = slot->ctrl->pci_dev->subordinate; - -dbg ("%s - physical_slot = %s\n" , __func__, hotplug_slot->name); - - *value = (pci_domain_nr (bus) <<16 ) | (slot->bus <<8 ) | slot->device; - -return 0 ; -} - -static int get_max_bus_speed (struct hotplug_slot *hotplug_slot,enum pci_bus_speed *value) +static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, +enum pci_bus_speed *value) {struct slot *slot = hotplug_slot->private;int retval;
@@ -474,7 +463,12 @@ static int pciehp_probe(struct pcie_device *dev, const struct pcie_port_service_/* Setup the slot information structures */ rc =init_slots (ctrl);if (rc) { -err ("%s: slot initialization failed\n" ,PCIE_MODULE_NAME ); +if (rc == -EBUSY ) +warn ("%s: slot already registered by another " +"hotplug driver\n" ,PCIE_MODULE_NAME ); +else +err ("%s: slot initialization failed\n" , +PCIE_MODULE_NAME ); goto err_out_release_ctlr; }
drivers/pci/hotplug/rpadlpar_sysfs.c +3 -2
@@ -14,8 +14,10 @@*/ #include <linux/kobject.h> #include <linux/string.h> +#include <linux/pci.h> #include <linux/pci_hotplug.h> #include "rpadlpar.h" +#include "../pci.h" #define DLPAR_KOBJ_NAME "control"
@@ -27,7 +29,6 @@#define MAX_DRC_NAME_LEN 64 -static ssize_t add_slot_store (struct kobject *kobj,struct kobj_attribute *attr,const char *buf,size_t nbytes) {
@@ -112,7 +113,7 @@ int dlpar_sysfs_init(void)int error; dlpar_kobj =kobject_create_and_add (DLPAR_KOBJ_NAME , - &pci_hotplug_slots_kset->kobj); + &pci_slots_kset->kobj);if (!dlpar_kobj)return -EINVAL ;
drivers/pci/hotplug/rpaphp_slot.c +6 -38
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drivers/pci/hotplug/sgi_hotplug.c +7 -3
@@ -197,13 +197,15 @@ static int sn_hp_slot_private_alloc(struct hotplug_slot *bss_hotplug_slot,static struct hotplug_slot *sn_hp_destroy (void ) {struct slot *slot; +struct pci_slot *pci_slot;struct hotplug_slot *bss_hotplug_slot =NULL ;list_for_each_entry (slot, &sn_hp_list, hp_list) { bss_hotplug_slot = slot->hotplug_slot; + pci_slot = bss_hotplug_slot->pci_slot;list_del (&((struct slot *)bss_hotplug_slot->private)-> hp_list); -sysfs_remove_file (&bss_hotplug_slot->kobj, +sysfs_remove_file (&pci_slot->kobj, &sn_slot_path_attr.attr);break ; }
@@ -614,6 +616,7 @@ static void sn_release_slot(struct hotplug_slot *bss_hotplug_slot)static int sn_hotplug_slot_register (struct pci_bus *pci_bus) {int device; +struct pci_slot *pci_slot;struct hotplug_slot *bss_hotplug_slot;int rc =0 ;
@@ -650,11 +653,12 @@ static int sn_hotplug_slot_register(struct pci_bus *pci_bus) bss_hotplug_slot->ops = &sn_hotplug_slot_ops; bss_hotplug_slot->release = &sn_release_slot; - rc =pci_hp_register (bss_hotplug_slot); + rc =pci_hp_register (bss_hotplug_slot, pci_bus, device);if (rc) goto register_err; - rc =sysfs_create_file (&bss_hotplug_slot->kobj, + pci_slot = bss_hotplug_slot->pci_slot; + rc =sysfs_create_file (&pci_slot->kobj, &sn_slot_path_attr.attr);if (rc) goto register_err;
drivers/pci/hotplug/shpchp_core.c +4 -16
@@ -68,7 +68,6 @@ static int get_power_status (struct hotplug_slot *slot, u8 *value);static int get_attention_status (struct hotplug_slot *slot,u8 *value);static int get_latch_status (struct hotplug_slot *slot,u8 *value);static int get_adapter_status (struct hotplug_slot *slot,u8 *value); -static int get_address (struct hotplug_slot *slot,u32 *value);static int get_max_bus_speed (struct hotplug_slot *slot,enum pci_bus_speed *value);static int get_cur_bus_speed (struct hotplug_slot *slot,enum pci_bus_speed *value);
@@ -81,7 +80,6 @@ static struct hotplug_slot_ops shpchp_hotplug_slot_ops = { .get_attention_status = get_attention_status, .get_latch_status = get_latch_status, .get_adapter_status = get_adapter_status, - .get_address = get_address, .get_max_bus_speed = get_max_bus_speed, .get_cur_bus_speed = get_cur_bus_speed, };
@@ -159,7 +157,8 @@ static int init_slots(struct controller *ctrl)dbg ("Registering bus=%x dev=%x hp_slot=%x sun=%x " "slot_device_offset=%x\n" , slot->bus, slot->device, slot->hp_slot, slot->number, ctrl->slot_device_offset); - retval =pci_hp_register (slot->hotplug_slot); + retval =pci_hp_register (slot->hotplug_slot, + ctrl->pci_dev->subordinate, slot->device);if (retval) {err ("pci_hp_register failed with error %d\n" , retval);if (retval == -EEXIST )
@@ -288,19 +287,8 @@ static int get_adapter_status (struct hotplug_slot *hotplug_slot, u8 *value)return 0 ; } -static int get_address (struct hotplug_slot *hotplug_slot,u32 *value) -{ -struct slot *slot =get_slot (hotplug_slot); -struct pci_bus *bus = slot->ctrl->pci_dev->subordinate; - -dbg ("%s - physical_slot = %s\n" , __func__, hotplug_slot->name); - - *value = (pci_domain_nr (bus) <<16 ) | (slot->bus <<8 ) | slot->device; - -return 0 ; -} - -static int get_max_bus_speed (struct hotplug_slot *hotplug_slot,enum pci_bus_speed *value) +static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, +enum pci_bus_speed *value) {struct slot *slot =get_slot (hotplug_slot);int retval;
drivers/pci/pci.h +13 -0
@@ -106,3 +106,16 @@ pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev) }struct pci_dev *pci_find_upstream_pcie_bridge (struct pci_dev *pdev); + +/* PCI slot sysfs helper code */ +#define to_pci_slot (s) container_of(s, struct pci_slot, kobj) + +extern struct kset *pci_slots_kset; + +struct pci_slot_attribute { +struct attribute attr; +ssize_t (*show)(struct pci_slot *,char *); +ssize_t (*store)(struct pci_slot *,const char *,size_t ); +}; +#define to_pci_slot_attr (s) container_of(s, struct pci_slot_attribute, attr) +
drivers/pci/probe.c +1 -0
@@ -414,6 +414,7 @@ static struct pci_bus * pci_alloc_bus(void)INIT_LIST_HEAD (&b->node);INIT_LIST_HEAD (&b->children);INIT_LIST_HEAD (&b->devices); +INIT_LIST_HEAD (&b->slots); }return b; }
drivers/pci/slot.c new file +233 -0
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include/linux/pci.h +17 -2
@@ -17,8 +17,7 @@#ifndef LINUX_PCI_H #define LINUX_PCI_H -/* Include the pci register defines */ -#include <linux/pci_regs.h> +#include <linux/pci_regs.h> /* The pci register defines */ /* * The PCI interface treats multi-function devices as independent
@@ -49,12 +48,22 @@#include <linux/list.h> #include <linux/compiler.h> #include <linux/errno.h> +#include <linux/kobject.h> #include <asm/atomic.h> #include <linux/device.h> /* Include the ID list */ #include <linux/pci_ids.h> +/* pci_slot represents a physical slot */ +struct pci_slot { +struct pci_bus *bus;/* The bus this slot is on */ +struct list_head list;/* node in list of slots on this bus */ +struct hotplug_slot *hotplug;/* Hotplug info (migrate over time) */ +unsigned char number;/* PCI_SLOT(pci_dev->devfn) */ +struct kobject kobj; +}; +/* File state for mmap()s on /proc/bus/pci/X/Y */ enum pci_mmap_state { pci_mmap_io,
@@ -142,6 +151,7 @@ struct pci_dev {void *sysdata;/* hook for sys-specific extension */ struct proc_dir_entry *procent;/* device entry in /proc/bus/pci */ +struct pci_slot *slot;/* Physical slot this device is in */ unsigned int devfn;/* encoded device & function index */ unsigned short vendor;
@@ -267,6 +277,7 @@ struct pci_bus {struct list_head children;/* list of child buses */ struct list_head devices;/* list of devices on this bus */ struct pci_dev *self;/* bridge device as seen by parent */ +struct list_head slots;/* list of slots on this bus */ struct resource *resource[PCI_BUS_NUM_RESOURCES ];/* address space routed to this bus */
@@ -489,6 +500,10 @@ struct pci_bus *pci_create_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata);struct pci_bus *pci_add_new_bus (struct pci_bus *parent,struct pci_dev *dev,int busnr); +struct pci_slot *pci_create_slot (struct pci_bus *parent,int slot_nr, +const char *name); +void pci_destroy_slot (struct pci_slot *slot); +void pci_update_slot_number (struct pci_slot *slot,int slot_nr);int pci_scan_slot (struct pci_bus *bus,int devfn);struct pci_dev *pci_scan_single_device (struct pci_bus *bus,int devfn);void pci_device_add (struct pci_dev *dev,struct pci_bus *bus);
include/linux/pci_hotplug.h +3 -9
@@ -95,9 +95,6 @@ struct hotplug_slot_attribute {* @get_adapter_status: Called to get see if an adapter is present in the slot or not. * If this field is NULL, the value passed in the struct hotplug_slot_info * will be used when this value is requested by a user. -* @get_address: Called to get pci address of a slot. -* If this field is NULL, the value passed in the struct hotplug_slot_info -* will be used when this value is requested by a user. * @get_max_bus_speed: Called to get the max bus speed for a slot. * If this field is NULL, the value passed in the struct hotplug_slot_info * will be used when this value is requested by a user.
@@ -120,7 +117,6 @@ struct hotplug_slot_ops {int (*get_attention_status) (struct hotplug_slot *slot,u8 *value);int (*get_latch_status) (struct hotplug_slot *slot,u8 *value);int (*get_adapter_status) (struct hotplug_slot *slot,u8 *value); -int (*get_address) (struct hotplug_slot *slot,u32 *value);int (*get_max_bus_speed) (struct hotplug_slot *slot,enum pci_bus_speed *value);int (*get_cur_bus_speed) (struct hotplug_slot *slot,enum pci_bus_speed *value); };
@@ -140,7 +136,6 @@ struct hotplug_slot_info {u8 attention_status;u8 latch_status;u8 adapter_status; -u32 address;enum pci_bus_speed max_bus_speed;enum pci_bus_speed cur_bus_speed; };
@@ -166,15 +161,14 @@ struct hotplug_slot {/* Variables below this are for use only by the hotplug pci core. */ struct list_head slot_list; -struct kobject kobj; +struct pci_slot *pci_slot; };#define to_hotplug_slot (n) container_of(n, struct hotplug_slot, kobj) -extern int pci_hp_register (struct hotplug_slot *slot); -extern int pci_hp_deregister (struct hotplug_slot *slot); +extern int pci_hp_register (struct hotplug_slot *,struct pci_bus *,int nr); +extern int pci_hp_deregister (struct hotplug_slot *slot);extern int __must_check pci_hp_change_slot_info (struct hotplug_slot *slot,struct hotplug_slot_info *info); -extern struct kset *pci_hotplug_slots_kset;/* PCI Setting Record (Type 0) */ struct hpp_type0 {
Signature · 1 line
1.5.3.1.1.g1e61
PATCH 3/3 ACPI PCI slot detection driver
In reply to Alex ChiangDetect all physical PCI slots as described by ACPI, and create entries in /sys/bus/pci/slots/.
Not all physical slots are hotpluggable, and the acpiphp module does not detect them. Now we know the physical PCI geography of our system, without caring about hotplug.
[[email protected]: export-kobject_rename-for-pci_hotplug_core]
Signed-off-by Kenji Kaneshige <[email protected]>
Acked-by Greg KH <[email protected]>
[[email protected]: build fix]
[[email protected]: fix build with CONFIG_DMI=n]
Signed-off-by Alex Chiang <[email protected]>
Cc Greg KH <[email protected]>
Cc Kristen Carlson Accardi <[email protected]>
Cc Len Brown <[email protected]>
Acked-by Kenji Kaneshige <[email protected]>
Signed-off-by Andrew Morton <[email protected]>
Signed-off-by Andrew Morton <[email protected]>
--- drivers/acpi/Kconfig | 9 + drivers/acpi/Makefile | 1 + drivers/acpi/pci_slot.c | 370 ++++++++++++++++++++++++++++++++ drivers/pci/hotplug/pci_hotplug_core.c | 16 ++ drivers/pci/hotplug/sgi_hotplug.c | 2 +- lib/kobject.c | 1 + 6 files changed, 398 insertions(+), 1 deletions(-) create mode 100644 drivers/acpi/pci_slot.c
drivers/acpi/Kconfig +9 -0
@@ -338,6 +338,15 @@ config ACPI_EC the battery and thermal drivers. If you are compiling for a mobile system, say Y. +config ACPI_PCI_SLOT + tristate "PCI slot detection driver" + default n + help + This driver will attempt to discover all PCI slots in your system, + and creates entries in /sys/bus/pci/slots/. This feature can + help you correlate PCI bus addresses with the physical geography + of your slots. If you are unsure, say N. + config ACPI_POWER bool default y
drivers/acpi/Makefile +1 -0
@@ -48,6 +48,7 @@ obj-$(CONFIG_ACPI_DOCK) += dock.o obj-$(CONFIG_ACPI_BAY) += bay.o obj-$(CONFIG_ACPI_VIDEO) += video.o obj-y += pci_root.o pci_link.o pci_irq.o pci_bind.o +obj-$(CONFIG_ACPI_PCI_SLOT) += pci_slot.o obj-$(CONFIG_ACPI_POWER) += power.o obj-$(CONFIG_ACPI_PROCESSOR) += processor.o obj-$(CONFIG_ACPI_CONTAINER) += container.o
drivers/acpi/pci_slot.c new file +370 -0
370 lines not on this page · raw message
drivers/pci/hotplug/pci_hotplug_core.c +16 -0
@@ -572,6 +572,11 @@ int pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus, int slot_nr)if (tmp)return -EEXIST ; +/* +* No problems if we call this interface from both ACPI_PCI_SLOT +* driver and call it here again. If we've already created the +* pci_slot, the interface will simply bump the refcount. +*/ pci_slot =pci_create_slot (bus, slot_nr, slot->name);if (IS_ERR (pci_slot))return PTR_ERR (pci_slot);
@@ -585,6 +590,17 @@ int pci_hp_register(struct hotplug_slot *slot, struct pci_bus *bus, int slot_nr) slot->pci_slot = pci_slot; pci_slot->hotplug = slot; +/* +* Allow pcihp drivers to override the ACPI_PCI_SLOT name. +*/ +if (strcmp (kobject_name (&pci_slot->kobj), slot->name)) { + result =kobject_rename (&pci_slot->kobj, slot->name); +if (result) { +pci_destroy_slot (pci_slot); +return result; + } + } +spin_lock (&pci_hotplug_slot_list_lock);list_add (&slot->slot_list, &pci_hotplug_slot_list);spin_unlock (&pci_hotplug_slot_list_lock);
drivers/pci/hotplug/sgi_hotplug.c +1 -1
@@ -668,7 +668,7 @@ static int sn_hotplug_slot_register(struct pci_bus *pci_bus) register_err:dev_dbg (&pci_bus->self->dev,"bus failed to register with err = %d\n" , - rc); + rc); alloc_err:if (rc == -ENOMEM )
lib/kobject.c +1 -0
@@ -489,6 +489,7 @@ out:return error; } +EXPORT_SYMBOL_GPL (kobject_rename);/** * kobject_move - move object to another parent
Signature · 1 line
1.5.3.1.1.g1e61