diff options
Diffstat (limited to 'drivers/pci/hotplug/pciehp_core.c')
| -rw-r--r-- | drivers/pci/hotplug/pciehp_core.c | 545 |
1 files changed, 163 insertions, 382 deletions
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c index 4fb569018a2..a2297db8081 100644 --- a/drivers/pci/hotplug/pciehp_core.c +++ b/drivers/pci/hotplug/pciehp_core.c @@ -30,17 +30,18 @@ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/kernel.h> +#include <linux/slab.h> #include <linux/types.h> #include <linux/pci.h> #include "pciehp.h" #include <linux/interrupt.h> +#include <linux/time.h> /* Global variables */ -int pciehp_debug; -int pciehp_poll_mode; +bool pciehp_debug; +bool pciehp_poll_mode; int pciehp_poll_time; -int pciehp_force; -struct controller *pciehp_ctrl_list; +static bool pciehp_force; #define DRIVER_VERSION "0.4" #define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>" @@ -57,11 +58,10 @@ module_param(pciehp_force, bool, 0644); MODULE_PARM_DESC(pciehp_debug, "Debugging mode enabled or not"); MODULE_PARM_DESC(pciehp_poll_mode, "Using polling mechanism for hot-plug events or not"); MODULE_PARM_DESC(pciehp_poll_time, "Polling mechanism frequency, in seconds"); -MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if _OSC and OSHP are missing"); +MODULE_PARM_DESC(pciehp_force, "Force pciehp, even if OSHP is missing"); #define PCIE_MODULE_NAME "pciehp" -static int pcie_start_thread (void); static int set_attention_status (struct hotplug_slot *slot, u8 value); static int enable_slot (struct hotplug_slot *slot); static int disable_slot (struct hotplug_slot *slot); @@ -69,21 +69,7 @@ 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_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); - -static struct hotplug_slot_ops pciehp_hotplug_slot_ops = { - .owner = THIS_MODULE, - .set_attention_status = set_attention_status, - .enable_slot = enable_slot, - .disable_slot = disable_slot, - .get_power_status = get_power_status, - .get_attention_status = get_attention_status, - .get_latch_status = get_latch_status, - .get_adapter_status = get_adapter_status, - .get_max_bus_speed = get_max_bus_speed, - .get_cur_bus_speed = get_cur_bus_speed, -}; +static int reset_slot (struct hotplug_slot *slot, int probe); /** * release_slot - free up the memory used by a slot @@ -93,155 +79,78 @@ static void release_slot(struct hotplug_slot *hotplug_slot) { struct slot *slot = hotplug_slot->private; - dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); - - kfree(slot->hotplug_slot->info); - kfree(slot->hotplug_slot->name); - kfree(slot->hotplug_slot); - kfree(slot); -} - -static int init_slots(struct controller *ctrl) -{ - struct slot *slot; - struct hpc_ops *hpc_ops; - struct hotplug_slot *hotplug_slot; - struct hotplug_slot_info *hotplug_slot_info; - u8 number_of_slots; - u8 slot_device; - u32 slot_number; - int result = -ENOMEM; - - number_of_slots = ctrl->num_slots; - slot_device = ctrl->slot_device_offset; - slot_number = ctrl->first_slot; - - while (number_of_slots) { - slot = kmalloc(sizeof(*slot), GFP_KERNEL); - if (!slot) - goto error; - - memset(slot, 0, sizeof(struct slot)); - slot->hotplug_slot = - kmalloc(sizeof(*(slot->hotplug_slot)), - GFP_KERNEL); - if (!slot->hotplug_slot) - goto error_slot; - hotplug_slot = slot->hotplug_slot; - memset(hotplug_slot, 0, sizeof(struct hotplug_slot)); - - hotplug_slot->info = - kmalloc(sizeof(*(hotplug_slot->info)), - GFP_KERNEL); - if (!hotplug_slot->info) - goto error_hpslot; - hotplug_slot_info = hotplug_slot->info; - memset(hotplug_slot_info, 0, - sizeof(struct hotplug_slot_info)); - hotplug_slot->name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL); - if (!hotplug_slot->name) - goto error_info; - - slot->ctrl = ctrl; - slot->bus = ctrl->slot_bus; - slot->device = slot_device; - slot->hpc_ops = hpc_ops = ctrl->hpc_ops; - - slot->number = ctrl->first_slot; - slot->hp_slot = slot_device - ctrl->slot_device_offset; - - /* register this slot with the hotplug pci core */ - hotplug_slot->private = slot; - hotplug_slot->release = &release_slot; - make_slot_name(hotplug_slot->name, SLOT_NAME_SIZE, slot); - hotplug_slot->ops = &pciehp_hotplug_slot_ops; - - hpc_ops->get_power_status(slot, - &(hotplug_slot_info->power_status)); - hpc_ops->get_attention_status(slot, - &(hotplug_slot_info->attention_status)); - hpc_ops->get_latch_status(slot, - &(hotplug_slot_info->latch_status)); - hpc_ops->get_adapter_status(slot, - &(hotplug_slot_info->adapter_status)); - - 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); - result = pci_hp_register(hotplug_slot); - if (result) { - err ("pci_hp_register failed with error %d\n", result); - goto error_name; - } - - slot->next = ctrl->slot; - ctrl->slot = slot; - - number_of_slots--; - slot_device++; - slot_number += ctrl->slot_num_inc; - } - - return 0; + ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", + __func__, hotplug_slot_name(hotplug_slot)); -error_name: - kfree(hotplug_slot->name); -error_info: - kfree(hotplug_slot_info); -error_hpslot: + kfree(hotplug_slot->ops); + kfree(hotplug_slot->info); kfree(hotplug_slot); -error_slot: - kfree(slot); -error: - return result; } - -static int cleanup_slots (struct controller * ctrl) +static int init_slot(struct controller *ctrl) { - struct slot *old_slot, *next_slot; - - old_slot = ctrl->slot; - ctrl->slot = NULL; - - while (old_slot) { - next_slot = old_slot->next; - pci_hp_deregister (old_slot->hotplug_slot); - old_slot = next_slot; + struct slot *slot = ctrl->slot; + struct hotplug_slot *hotplug = NULL; + struct hotplug_slot_info *info = NULL; + struct hotplug_slot_ops *ops = NULL; + char name[SLOT_NAME_SIZE]; + int retval = -ENOMEM; + + hotplug = kzalloc(sizeof(*hotplug), GFP_KERNEL); + if (!hotplug) + goto out; + + info = kzalloc(sizeof(*info), GFP_KERNEL); + if (!info) + goto out; + + /* Setup hotplug slot ops */ + ops = kzalloc(sizeof(*ops), GFP_KERNEL); + if (!ops) + goto out; + + ops->enable_slot = enable_slot; + ops->disable_slot = disable_slot; + ops->get_power_status = get_power_status; + ops->get_adapter_status = get_adapter_status; + ops->reset_slot = reset_slot; + if (MRL_SENS(ctrl)) + ops->get_latch_status = get_latch_status; + if (ATTN_LED(ctrl)) { + ops->get_attention_status = get_attention_status; + ops->set_attention_status = set_attention_status; } - - return(0); + /* register this slot with the hotplug pci core */ + hotplug->info = info; + hotplug->private = slot; + hotplug->release = &release_slot; + hotplug->ops = ops; + slot->hotplug_slot = hotplug; + snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl)); + + ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:00 sun=%x\n", + pci_domain_nr(ctrl->pcie->port->subordinate), + ctrl->pcie->port->subordinate->number, PSN(ctrl)); + retval = pci_hp_register(hotplug, + ctrl->pcie->port->subordinate, 0, name); + if (retval) + ctrl_err(ctrl, + "pci_hp_register failed with error %d\n", retval); +out: + if (retval) { + kfree(ops); + kfree(info); + kfree(hotplug); + } + return retval; } -static int get_ctlr_slot_config(struct controller *ctrl) +static void cleanup_slot(struct controller *ctrl) { - int num_ctlr_slots; /* Not needed; PCI Express has 1 slot per port*/ - int first_device_num; /* Not needed */ - int physical_slot_num; - u8 ctrlcap; - int rc; - - rc = pcie_get_ctlr_slot_config(ctrl, &num_ctlr_slots, &first_device_num, &physical_slot_num, &ctrlcap); - if (rc) { - err("%s: get_ctlr_slot_config fail for b:d (%x:%x)\n", __FUNCTION__, ctrl->bus, ctrl->device); - return (-1); - } - - ctrl->num_slots = num_ctlr_slots; /* PCI Express has 1 slot per port */ - ctrl->slot_device_offset = first_device_num; - ctrl->first_slot = physical_slot_num; - ctrl->ctrlcap = ctrlcap; - - dbg("%s: bus(0x%x) num_slot(0x%x) 1st_dev(0x%x) psn(0x%x) ctrlcap(%x) for b:d (%x:%x)\n", - __FUNCTION__, ctrl->slot_bus, num_ctlr_slots, first_device_num, physical_slot_num, ctrlcap, - ctrl->bus, ctrl->device); - - return (0); + pci_hp_deregister(ctrl->slot->hotplug_slot); } - /* * set_attention_status - Turns the Amber LED for a slot on, off or blink */ @@ -249,13 +158,10 @@ static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status) { struct slot *slot = hotplug_slot->private; - dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); - - hotplug_slot->info->attention_status = status; - - if (ATTN_LED(slot->ctrl->ctrlcap)) - slot->hpc_ops->set_attention_status(slot, status); + ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", + __func__, slot_name(slot)); + pciehp_set_attention_status(slot, status); return 0; } @@ -264,9 +170,10 @@ static int enable_slot(struct hotplug_slot *hotplug_slot) { struct slot *slot = hotplug_slot->private; - dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); + ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", + __func__, slot_name(slot)); - return pciehp_enable_slot(slot); + return pciehp_sysfs_enable_slot(slot); } @@ -274,281 +181,170 @@ static int disable_slot(struct hotplug_slot *hotplug_slot) { struct slot *slot = hotplug_slot->private; - dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); + ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", + __func__, slot_name(slot)); - return pciehp_disable_slot(slot); + return pciehp_sysfs_disable_slot(slot); } static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) { struct slot *slot = hotplug_slot->private; - int retval; - - dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); - retval = slot->hpc_ops->get_power_status(slot, value); - if (retval < 0) - *value = hotplug_slot->info->power_status; + ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", + __func__, slot_name(slot)); + pciehp_get_power_status(slot, value); return 0; } static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) { struct slot *slot = hotplug_slot->private; - int retval; - dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); - - retval = slot->hpc_ops->get_attention_status(slot, value); - if (retval < 0) - *value = hotplug_slot->info->attention_status; + ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", + __func__, slot_name(slot)); + pciehp_get_attention_status(slot, value); return 0; } static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) { struct slot *slot = hotplug_slot->private; - int retval; - - dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); - retval = slot->hpc_ops->get_latch_status(slot, value); - if (retval < 0) - *value = hotplug_slot->info->latch_status; + ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", + __func__, slot_name(slot)); + pciehp_get_latch_status(slot, value); return 0; } static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) { struct slot *slot = hotplug_slot->private; - int retval; - - dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); - retval = slot->hpc_ops->get_adapter_status(slot, value); - if (retval < 0) - *value = hotplug_slot->info->adapter_status; + ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", + __func__, slot_name(slot)); + pciehp_get_adapter_status(slot, value); return 0; } -static int get_max_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) +static int reset_slot(struct hotplug_slot *hotplug_slot, int probe) { struct slot *slot = hotplug_slot->private; - int retval; - dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); - - retval = slot->hpc_ops->get_max_bus_speed(slot, value); - if (retval < 0) - *value = PCI_SPEED_UNKNOWN; + ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", + __func__, slot_name(slot)); - return 0; + return pciehp_reset_slot(slot, probe); } -static int get_cur_bus_speed(struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) -{ - struct slot *slot = hotplug_slot->private; - int retval; - - dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); - - retval = slot->hpc_ops->get_cur_bus_speed(slot, value); - if (retval < 0) - *value = PCI_SPEED_UNKNOWN; - - return 0; -} - -static int pciehp_probe(struct pcie_device *dev, const struct pcie_port_service_id *id) +static int pciehp_probe(struct pcie_device *dev) { int rc; struct controller *ctrl; - struct slot *t_slot; - int first_device_num = 0 ; /* first PCI device number supported by this PCIE */ - int num_ctlr_slots; /* number of slots supported by this HPC */ - u8 value; - struct pci_dev *pdev; - - ctrl = kmalloc(sizeof(*ctrl), GFP_KERNEL); - if (!ctrl) { - err("%s : out of memory\n", __FUNCTION__); - goto err_out_none; - } - memset(ctrl, 0, sizeof(struct controller)); - - pdev = dev->port; - ctrl->pci_dev = pdev; - - rc = pcie_init(ctrl, dev); - if (rc) { - dbg("%s: controller initialization failed\n", PCIE_MODULE_NAME); - goto err_out_free_ctrl; - } + struct slot *slot; + u8 occupied, poweron; - pci_set_drvdata(pdev, ctrl); + if (pciehp_force) + dev_info(&dev->device, + "Bypassing BIOS check for pciehp use on %s\n", + pci_name(dev->port)); + else if (pciehp_acpi_slot_detection_check(dev->port)) + goto err_out_none; - ctrl->pci_bus = kmalloc(sizeof(*ctrl->pci_bus), GFP_KERNEL); - if (!ctrl->pci_bus) { - err("%s: out of memory\n", __FUNCTION__); - rc = -ENOMEM; - goto err_out_unmap_mmio_region; + ctrl = pcie_init(dev); + if (!ctrl) { + dev_err(&dev->device, "Controller initialization failed\n"); + goto err_out_none; } - memcpy (ctrl->pci_bus, pdev->bus, sizeof (*ctrl->pci_bus)); - ctrl->bus = pdev->bus->number; /* ctrl bus */ - ctrl->slot_bus = pdev->subordinate->number; /* bus controlled by this HPC */ - - ctrl->device = PCI_SLOT(pdev->devfn); - ctrl->function = PCI_FUNC(pdev->devfn); - dbg("%s: ctrl bus=0x%x, device=%x, function=%x, irq=%x\n", __FUNCTION__, - ctrl->bus, ctrl->device, ctrl->function, pdev->irq); + set_service_data(dev, ctrl); - /* - * Save configuration headers for this and subordinate PCI buses - */ - - rc = get_ctlr_slot_config(ctrl); + /* Setup the slot information structures */ + rc = init_slot(ctrl); if (rc) { - err(msg_initialization_err, rc); - goto err_out_free_ctrl_bus; + if (rc == -EBUSY) + ctrl_warn(ctrl, "Slot already registered by another hotplug driver\n"); + else + ctrl_err(ctrl, "Slot initialization failed\n"); + goto err_out_release_ctlr; } - first_device_num = ctrl->slot_device_offset; - num_ctlr_slots = ctrl->num_slots; - /* Setup the slot information structures */ - rc = init_slots(ctrl); + /* Enable events after we have setup the data structures */ + rc = pcie_init_notification(ctrl); if (rc) { - err(msg_initialization_err, 6); + ctrl_err(ctrl, "Notification initialization failed\n"); goto err_out_free_ctrl_slot; } - t_slot = pciehp_find_slot(ctrl, first_device_num); - - /* Finish setting up the hot plug ctrl device */ - ctrl->next_event = 0; - - if (!pciehp_ctrl_list) { - pciehp_ctrl_list = ctrl; - ctrl->next = NULL; - } else { - ctrl->next = pciehp_ctrl_list; - pciehp_ctrl_list = ctrl; - } - - /* Wait for exclusive access to hardware */ - down(&ctrl->crit_sect); - - t_slot->hpc_ops->get_adapter_status(t_slot, &value); /* Check if slot is occupied */ - - if ((POWER_CTRL(ctrl->ctrlcap)) && !value) { - rc = t_slot->hpc_ops->power_off_slot(t_slot); /* Power off slot if not occupied*/ - if (rc) { - /* Done with exclusive hardware access */ - up(&ctrl->crit_sect); - goto err_out_free_ctrl_slot; - } else - /* Wait for the command to complete */ - wait_for_ctrl_irq (ctrl); + /* Check if slot is occupied */ + slot = ctrl->slot; + pciehp_get_adapter_status(slot, &occupied); + pciehp_get_power_status(slot, &poweron); + if (occupied && pciehp_force) { + mutex_lock(&slot->hotplug_lock); + pciehp_enable_slot(slot); + mutex_unlock(&slot->hotplug_lock); } - - /* Done with exclusive hardware access */ - up(&ctrl->crit_sect); + /* If empty slot's power status is on, turn power off */ + if (!occupied && poweron && POWER_CTRL(ctrl)) + pciehp_power_off_slot(slot); return 0; err_out_free_ctrl_slot: - cleanup_slots(ctrl); -err_out_free_ctrl_bus: - kfree(ctrl->pci_bus); -err_out_unmap_mmio_region: - ctrl->hpc_ops->release_ctlr(ctrl); -err_out_free_ctrl: - kfree(ctrl); + cleanup_slot(ctrl); +err_out_release_ctlr: + pciehp_release_ctrl(ctrl); err_out_none: return -ENODEV; } - -static int pcie_start_thread(void) +static void pciehp_remove(struct pcie_device *dev) { - int retval = 0; - - dbg("Initialize + Start the notification/polling mechanism \n"); + struct controller *ctrl = get_service_data(dev); - retval = pciehp_event_start_thread(); - if (retval) { - dbg("pciehp_event_start_thread() failed\n"); - return retval; - } + cleanup_slot(ctrl); + pciehp_release_ctrl(ctrl); +} - return retval; +#ifdef CONFIG_PM +static int pciehp_suspend(struct pcie_device *dev) +{ + return 0; } -static void __exit unload_pciehpd(void) +static int pciehp_resume(struct pcie_device *dev) { struct controller *ctrl; - struct controller *tctrl; - - ctrl = pciehp_ctrl_list; - - while (ctrl) { - cleanup_slots(ctrl); - - kfree (ctrl->pci_bus); - - ctrl->hpc_ops->release_ctlr(ctrl); - - tctrl = ctrl; - ctrl = ctrl->next; - - kfree(tctrl); - } - - /* Stop the notification mechanism */ - pciehp_event_stop_thread(); + struct slot *slot; + u8 status; -} + ctrl = get_service_data(dev); -static int hpdriver_context = 0; + /* reinitialize the chipset's event detection logic */ + pcie_enable_notification(ctrl); -static void pciehp_remove (struct pcie_device *device) -{ - printk("%s ENTRY\n", __FUNCTION__); - printk("%s -> Call free_irq for irq = %d\n", - __FUNCTION__, device->irq); - free_irq(device->irq, &hpdriver_context); -} + slot = ctrl->slot; -#ifdef CONFIG_PM -static int pciehp_suspend (struct pcie_device *dev, pm_message_t state) -{ - printk("%s ENTRY\n", __FUNCTION__); + /* Check if slot is occupied */ + pciehp_get_adapter_status(slot, &status); + mutex_lock(&slot->hotplug_lock); + if (status) + pciehp_enable_slot(slot); + else + pciehp_disable_slot(slot); + mutex_unlock(&slot->hotplug_lock); return 0; } - -static int pciehp_resume (struct pcie_device *dev) -{ - printk("%s ENTRY\n", __FUNCTION__); - return 0; -} -#endif - -static struct pcie_port_service_id port_pci_ids[] = { { - .vendor = PCI_ANY_ID, - .device = PCI_ANY_ID, - .port_type = PCIE_ANY_PORT, - .service_type = PCIE_PORT_SERVICE_HP, - .driver_data = 0, - }, { /* end: all zeroes */ } -}; -static const char device_name[] = "hpdriver"; +#endif /* PM */ static struct pcie_port_service_driver hpdriver_portdrv = { - .name = (char *)device_name, - .id_table = &port_pci_ids[0], + .name = PCIE_MODULE_NAME, + .port_type = PCIE_ANY_PORT, + .service = PCIE_PORT_SERVICE_HP, .probe = pciehp_probe, .remove = pciehp_remove, @@ -563,24 +359,12 @@ static int __init pcied_init(void) { int retval = 0; -#ifdef CONFIG_HOTPLUG_PCI_PCIE_POLL_EVENT_MODE - pciehp_poll_mode = 1; -#endif - - retval = pcie_start_thread(); - if (retval) - goto error_hpc_init; - + pciehp_firmware_init(); retval = pcie_port_service_register(&hpdriver_portdrv); - dbg("pcie_port_service_register = %d\n", retval); - info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); - if (retval) - dbg("%s: Failure to register service\n", __FUNCTION__); - -error_hpc_init: - if (retval) { - pciehp_event_stop_thread(); - }; + dbg("pcie_port_service_register = %d\n", retval); + info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); + if (retval) + dbg("Failure to register service\n"); return retval; } @@ -588,10 +372,7 @@ error_hpc_init: static void __exit pcied_cleanup(void) { dbg("unload_pciehpd()\n"); - unload_pciehpd(); - pcie_port_service_unregister(&hpdriver_portdrv); - info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n"); } |
