diff options
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/hotplug/pciehp.h | 67 | ||||
| -rw-r--r-- | drivers/pci/hotplug/pciehp_core.c | 53 | ||||
| -rw-r--r-- | drivers/pci/hotplug/pciehp_ctrl.c | 244 | ||||
| -rw-r--r-- | drivers/pci/hotplug/pciehp_hpc.c | 114 | ||||
| -rw-r--r-- | drivers/pci/hotplug/pciehp_pci.c | 14 |
5 files changed, 210 insertions, 282 deletions
diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h index b9204ef3ecd7..df9308f6dafa 100644 --- a/drivers/pci/hotplug/pciehp.h +++ b/drivers/pci/hotplug/pciehp.h @@ -59,31 +59,12 @@ do { \ #define SLOT_NAME_SIZE 10 /** - * struct slot - PCIe hotplug slot - * @state: current state machine position - * @ctrl: pointer to the slot's controller structure - * @hotplug_slot: pointer to the structure registered with the PCI hotplug core - * @work: work item to turn the slot on or off after 5 seconds in response to - * an Attention Button press - * @lock: protects reads and writes of @state; - * protects scheduling, execution and cancellation of @work - */ -struct slot { - u8 state; - struct controller *ctrl; - struct hotplug_slot *hotplug_slot; - struct delayed_work work; - struct mutex lock; -}; - -/** * struct controller - PCIe hotplug controller * @ctrl_lock: serializes writes to the Slot Control register * @pcie: pointer to the controller's PCIe port service device * @reset_lock: prevents access to the Data Link Layer Link Active bit in the * Link Status register and to the Presence Detect State bit in the Slot * Status register during a slot reset which may cause them to flap - * @slot: pointer to the controller's slot structure * @queue: wait queue to wake up on reception of a Command Completed event, * used for synchronous writes to the Slot Control register * @slot_cap: cached copy of the Slot Capabilities register @@ -105,15 +86,23 @@ struct slot { * that has not yet been cleared by the user * @pending_events: used by the IRQ handler to save events retrieved from the * Slot Status register for later consumption by the IRQ thread + * @state: current state machine position + * @lock: protects reads and writes of @state; + * protects scheduling, execution and cancellation of @work + * @work: work item to turn the slot on or off after 5 seconds + * in response to an Attention Button press + * @hotplug_slot: pointer to the structure registered with the PCI hotplug core * @request_result: result of last user request submitted to the IRQ thread * @requester: wait queue to wake up on completion of user request, * used for synchronous slot enable/disable request via sysfs + * + * PCIe hotplug has a 1:1 relationship between controller and slot, hence + * unlike other drivers, the two aren't represented by separate structures. */ struct controller { struct mutex ctrl_lock; struct pcie_device *pcie; struct rw_semaphore reset_lock; - struct slot *slot; wait_queue_head_t queue; u32 slot_cap; u16 slot_ctrl; @@ -124,6 +113,10 @@ struct controller { unsigned int notification_enabled:1; unsigned int power_fault_detected; atomic_t pending_events; + u8 state; + struct mutex lock; + struct delayed_work work; + struct hotplug_slot *hotplug_slot; int request_result; wait_queue_head_t requester; }; @@ -174,26 +167,26 @@ struct controller { #define PSN(ctrl) (((ctrl)->slot_cap & PCI_EXP_SLTCAP_PSN) >> 19) void pciehp_request(struct controller *ctrl, int action); -void pciehp_handle_button_press(struct slot *slot); -void pciehp_handle_disable_request(struct slot *slot); -void pciehp_handle_presence_or_link_change(struct slot *slot, u32 events); -int pciehp_configure_device(struct slot *p_slot); -void pciehp_unconfigure_device(struct slot *p_slot, bool presence); +void pciehp_handle_button_press(struct controller *ctrl); +void pciehp_handle_disable_request(struct controller *ctrl); +void pciehp_handle_presence_or_link_change(struct controller *ctrl, u32 events); +int pciehp_configure_device(struct controller *ctrl); +void pciehp_unconfigure_device(struct controller *ctrl, bool presence); void pciehp_queue_pushbutton_work(struct work_struct *work); struct controller *pcie_init(struct pcie_device *dev); int pcie_init_notification(struct controller *ctrl); void pcie_shutdown_notification(struct controller *ctrl); void pcie_clear_hotplug_events(struct controller *ctrl); -int pciehp_power_on_slot(struct slot *slot); -void pciehp_power_off_slot(struct slot *slot); -void pciehp_get_power_status(struct slot *slot, u8 *status); - -void pciehp_set_attention_status(struct slot *slot, u8 status); -void pciehp_get_latch_status(struct slot *slot, u8 *status); -int pciehp_query_power_fault(struct slot *slot); -void pciehp_green_led_on(struct slot *slot); -void pciehp_green_led_off(struct slot *slot); -void pciehp_green_led_blink(struct slot *slot); +int pciehp_power_on_slot(struct controller *ctrl); +void pciehp_power_off_slot(struct controller *ctrl); +void pciehp_get_power_status(struct controller *ctrl, u8 *status); + +void pciehp_set_attention_status(struct controller *ctrl, u8 status); +void pciehp_get_latch_status(struct controller *ctrl, u8 *status); +int pciehp_query_power_fault(struct controller *ctrl); +void pciehp_green_led_on(struct controller *ctrl); +void pciehp_green_led_off(struct controller *ctrl); +void pciehp_green_led_blink(struct controller *ctrl); bool pciehp_card_present(struct controller *ctrl); bool pciehp_card_present_or_link_active(struct controller *ctrl); int pciehp_check_link_status(struct controller *ctrl); @@ -207,9 +200,9 @@ int pciehp_get_attention_status(struct hotplug_slot *hotplug_slot, u8 *status); int pciehp_set_raw_indicator_status(struct hotplug_slot *h_slot, u8 status); int pciehp_get_raw_indicator_status(struct hotplug_slot *h_slot, u8 *status); -static inline const char *slot_name(struct slot *slot) +static inline const char *slot_name(struct controller *ctrl) { - return hotplug_slot_name(slot->hotplug_slot); + return hotplug_slot_name(ctrl->hotplug_slot); } #endif /* _PCIEHP_H */ diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c index d24875102b1f..4a371ef80842 100644 --- a/drivers/pci/hotplug/pciehp_core.c +++ b/drivers/pci/hotplug/pciehp_core.c @@ -51,7 +51,6 @@ static int get_adapter_status(struct hotplug_slot *slot, u8 *value); static int init_slot(struct controller *ctrl) { - struct slot *slot = ctrl->slot; struct hotplug_slot *hotplug = NULL; struct hotplug_slot_info *info = NULL; struct hotplug_slot_ops *ops = NULL; @@ -88,9 +87,9 @@ static int init_slot(struct controller *ctrl) /* register this slot with the hotplug pci core */ hotplug->info = info; - hotplug->private = slot; + hotplug->private = ctrl; hotplug->ops = ops; - slot->hotplug_slot = hotplug; + ctrl->hotplug_slot = hotplug; snprintf(name, SLOT_NAME_SIZE, "%u", PSN(ctrl)); retval = pci_hp_initialize(hotplug, @@ -108,7 +107,7 @@ out: static void cleanup_slot(struct controller *ctrl) { - struct hotplug_slot *hotplug_slot = ctrl->slot->hotplug_slot; + struct hotplug_slot *hotplug_slot = ctrl->hotplug_slot; pci_hp_destroy(hotplug_slot); kfree(hotplug_slot->ops); @@ -121,44 +120,44 @@ static void cleanup_slot(struct controller *ctrl) */ static int set_attention_status(struct hotplug_slot *hotplug_slot, u8 status) { - struct slot *slot = hotplug_slot->private; - struct pci_dev *pdev = slot->ctrl->pcie->port; + struct controller *ctrl = hotplug_slot->private; + struct pci_dev *pdev = ctrl->pcie->port; pci_config_pm_runtime_get(pdev); - pciehp_set_attention_status(slot, status); + pciehp_set_attention_status(ctrl, status); pci_config_pm_runtime_put(pdev); return 0; } static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) { - struct slot *slot = hotplug_slot->private; - struct pci_dev *pdev = slot->ctrl->pcie->port; + struct controller *ctrl = hotplug_slot->private; + struct pci_dev *pdev = ctrl->pcie->port; pci_config_pm_runtime_get(pdev); - pciehp_get_power_status(slot, value); + pciehp_get_power_status(ctrl, value); pci_config_pm_runtime_put(pdev); return 0; } static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) { - struct slot *slot = hotplug_slot->private; - struct pci_dev *pdev = slot->ctrl->pcie->port; + struct controller *ctrl = hotplug_slot->private; + struct pci_dev *pdev = ctrl->pcie->port; pci_config_pm_runtime_get(pdev); - pciehp_get_latch_status(slot, value); + pciehp_get_latch_status(ctrl, value); pci_config_pm_runtime_put(pdev); return 0; } static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) { - struct slot *slot = hotplug_slot->private; - struct pci_dev *pdev = slot->ctrl->pcie->port; + struct controller *ctrl = hotplug_slot->private; + struct pci_dev *pdev = ctrl->pcie->port; pci_config_pm_runtime_get(pdev); - *value = pciehp_card_present_or_link_active(slot->ctrl); + *value = pciehp_card_present_or_link_active(ctrl); pci_config_pm_runtime_put(pdev); return 0; } @@ -175,20 +174,19 @@ static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) */ static void pciehp_check_presence(struct controller *ctrl) { - struct slot *slot = ctrl->slot; bool occupied; down_read(&ctrl->reset_lock); - mutex_lock(&slot->lock); + mutex_lock(&ctrl->lock); occupied = pciehp_card_present_or_link_active(ctrl); - if ((occupied && (slot->state == OFF_STATE || - slot->state == BLINKINGON_STATE)) || - (!occupied && (slot->state == ON_STATE || - slot->state == BLINKINGOFF_STATE))) + if ((occupied && (ctrl->state == OFF_STATE || + ctrl->state == BLINKINGON_STATE)) || + (!occupied && (ctrl->state == ON_STATE || + ctrl->state == BLINKINGOFF_STATE))) pciehp_request(ctrl, PCI_EXP_SLTSTA_PDC); - mutex_unlock(&slot->lock); + mutex_unlock(&ctrl->lock); up_read(&ctrl->reset_lock); } @@ -196,7 +194,6 @@ static int pciehp_probe(struct pcie_device *dev) { int rc; struct controller *ctrl; - struct slot *slot; /* If this is not a "hotplug" service, we have no business here. */ if (dev->service != PCIE_PORT_SERVICE_HP) @@ -234,8 +231,7 @@ static int pciehp_probe(struct pcie_device *dev) } /* Publish to user space */ - slot = ctrl->slot; - rc = pci_hp_add(slot->hotplug_slot); + rc = pci_hp_add(ctrl->hotplug_slot); if (rc) { ctrl_err(ctrl, "Publication to user space failed (%d)\n", rc); goto err_out_shutdown_notification; @@ -258,7 +254,7 @@ static void pciehp_remove(struct pcie_device *dev) { struct controller *ctrl = get_service_data(dev); - pci_hp_del(ctrl->slot->hotplug_slot); + pci_hp_del(ctrl->hotplug_slot); pcie_shutdown_notification(ctrl); cleanup_slot(ctrl); pciehp_release_ctrl(ctrl); @@ -273,14 +269,13 @@ static int pciehp_suspend(struct pcie_device *dev) static int pciehp_resume_noirq(struct pcie_device *dev) { struct controller *ctrl = get_service_data(dev); - struct slot *slot = ctrl->slot; /* pci_restore_state() just wrote to the Slot Control register */ ctrl->cmd_started = jiffies; ctrl->cmd_busy = true; /* clear spurious events from rediscovery of inserted card */ - if (slot->state == ON_STATE || slot->state == BLINKINGOFF_STATE) + if (ctrl->state == ON_STATE || ctrl->state == BLINKINGOFF_STATE) pcie_clear_hotplug_events(ctrl); return 0; diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c index 1fda6ea96fdc..cd0541d80946 100644 --- a/drivers/pci/hotplug/pciehp_ctrl.c +++ b/drivers/pci/hotplug/pciehp_ctrl.c @@ -26,11 +26,11 @@ #define SAFE_REMOVAL true #define SURPRISE_REMOVAL false -static void set_slot_off(struct controller *ctrl, struct slot *pslot) +static void set_slot_off(struct controller *ctrl) { /* turn off slot, turn on Amber LED, turn off Green LED if supported*/ if (POWER_CTRL(ctrl)) { - pciehp_power_off_slot(pslot); + pciehp_power_off_slot(ctrl); /* * After turning power off, we must wait for at least 1 second @@ -40,31 +40,30 @@ static void set_slot_off(struct controller *ctrl, struct slot *pslot) msleep(1000); } - pciehp_green_led_off(pslot); - pciehp_set_attention_status(pslot, 1); + pciehp_green_led_off(ctrl); + pciehp_set_attention_status(ctrl, 1); } /** * board_added - Called after a board has been added to the system. - * @p_slot: &slot where board is added + * @ctrl: PCIe hotplug controller where board is added * * Turns power on for the board. * Configures board. */ -static int board_added(struct slot *p_slot) +static int board_added(struct controller *ctrl) { int retval = 0; - struct controller *ctrl = p_slot->ctrl; struct pci_bus *parent = ctrl->pcie->port->subordinate; if (POWER_CTRL(ctrl)) { /* Power on slot */ - retval = pciehp_power_on_slot(p_slot); + retval = pciehp_power_on_slot(ctrl); if (retval) return retval; } - pciehp_green_led_blink(p_slot); + pciehp_green_led_blink(ctrl); /* Check link training status */ retval = pciehp_check_link_status(ctrl); @@ -74,13 +73,13 @@ static int board_added(struct slot *p_slot) } /* Check for a power fault */ - if (ctrl->power_fault_detected || pciehp_query_power_fault(p_slot)) { - ctrl_err(ctrl, "Slot(%s): Power fault\n", slot_name(p_slot)); + if (ctrl->power_fault_detected || pciehp_query_power_fault(ctrl)) { + ctrl_err(ctrl, "Slot(%s): Power fault\n", slot_name(ctrl)); retval = -EIO; goto err_exit; } - retval = pciehp_configure_device(p_slot); + retval = pciehp_configure_device(ctrl); if (retval) { if (retval != -EEXIST) { ctrl_err(ctrl, "Cannot add device at %04x:%02x:00\n", @@ -89,28 +88,26 @@ static int board_added(struct slot *p_slot) } } - pciehp_green_led_on(p_slot); - pciehp_set_attention_status(p_slot, 0); + pciehp_green_led_on(ctrl); + pciehp_set_attention_status(ctrl, 0); return 0; err_exit: - set_slot_off(ctrl, p_slot); + set_slot_off(ctrl); return retval; } /** * remove_board - Turns off slot and LEDs - * @p_slot: slot where board is being removed + * @ctrl: PCIe hotplug controller where board is being removed * @safe_removal: whether the board is safely removed (versus surprise removed) */ -static void remove_board(struct slot *p_slot, bool safe_removal) +static void remove_board(struct controller *ctrl, bool safe_removal) { - struct controller *ctrl = p_slot->ctrl; - - pciehp_unconfigure_device(p_slot, safe_removal); + pciehp_unconfigure_device(ctrl, safe_removal); if (POWER_CTRL(ctrl)) { - pciehp_power_off_slot(p_slot); + pciehp_power_off_slot(ctrl); /* * After turning power off, we must wait for at least 1 second @@ -121,11 +118,11 @@ static void remove_board(struct slot *p_slot, bool safe_removal) } /* turn off Green LED */ - pciehp_green_led_off(p_slot); + pciehp_green_led_off(ctrl); } -static int pciehp_enable_slot(struct slot *slot); -static int pciehp_disable_slot(struct slot *slot, bool safe_removal); +static int pciehp_enable_slot(struct controller *ctrl); +static int pciehp_disable_slot(struct controller *ctrl, bool safe_removal); void pciehp_request(struct controller *ctrl, int action) { @@ -136,11 +133,11 @@ void pciehp_request(struct controller *ctrl, int action) void pciehp_queue_pushbutton_work(struct work_struct *work) { - struct slot *p_slot = container_of(work, struct slot, work.work); - struct controller *ctrl = p_slot->ctrl; + struct controller *ctrl = container_of(work, struct controller, + work.work); - mutex_lock(&p_slot->lock); - switch (p_slot->state) { + mutex_lock(&ctrl->lock); + switch (ctrl->state) { case BLINKINGOFF_STATE: pciehp_request(ctrl, DISABLE_SLOT); break; @@ -150,30 +147,28 @@ void pciehp_queue_pushbutton_work(struct work_struct *work) default: break; } - mutex_unlock(&p_slot->lock); + mutex_unlock(&ctrl->lock); } -void pciehp_handle_button_press(struct slot *p_slot) +void pciehp_handle_button_press(struct controller *ctrl) { - struct controller *ctrl = p_slot->ctrl; - - mutex_lock(&p_slot->lock); - switch (p_slot->state) { + mutex_lock(&ctrl->lock); + switch (ctrl->state) { case OFF_STATE: case ON_STATE: - if (p_slot->state == ON_STATE) { - p_slot->state = BLINKINGOFF_STATE; + if (ctrl->state == ON_STATE) { + ctrl->state = BLINKINGOFF_STATE; ctrl_info(ctrl, "Slot(%s): Powering off due to button press\n", - slot_name(p_slot)); + slot_name(ctrl)); } else { - p_slot->state = BLINKINGON_STATE; + ctrl->state = BLINKINGON_STATE; ctrl_info(ctrl, "Slot(%s) Powering on due to button press\n", - slot_name(p_slot)); + slot_name(ctrl)); } /* blink green LED and turn off amber */ - pciehp_green_led_blink(p_slot); - pciehp_set_attention_status(p_slot, 0); - schedule_delayed_work(&p_slot->work, 5 * HZ); + pciehp_green_led_blink(ctrl); + pciehp_set_attention_status(ctrl, 0); + schedule_delayed_work(&ctrl->work, 5 * HZ); break; case BLINKINGOFF_STATE: case BLINKINGON_STATE: @@ -182,192 +177,184 @@ void pciehp_handle_button_press(struct slot *p_slot) * press the attention again before the 5 sec. limit * expires to cancel hot-add or hot-remove */ - ctrl_info(ctrl, "Slot(%s): Button cancel\n", slot_name(p_slot)); - cancel_delayed_work(&p_slot->work); - if (p_slot->state == BLINKINGOFF_STATE) { - p_slot->state = ON_STATE; - pciehp_green_led_on(p_slot); + ctrl_info(ctrl, "Slot(%s): Button cancel\n", slot_name(ctrl)); + cancel_delayed_work(&ctrl->work); + if (ctrl->state == BLINKINGOFF_STATE) { + ctrl->state = ON_STATE; + pciehp_green_led_on(ctrl); } else { - p_slot->state = OFF_STATE; - pciehp_green_led_off(p_slot); + ctrl->state = OFF_STATE; + pciehp_green_led_off(ctrl); } - pciehp_set_attention_status(p_slot, 0); + pciehp_set_attention_status(ctrl, 0); ctrl_info(ctrl, "Slot(%s): Action canceled due to button press\n", - slot_name(p_slot)); + slot_name(ctrl)); break; default: ctrl_err(ctrl, "Slot(%s): Ignoring invalid state %#x\n", - slot_name(p_slot), p_slot->state); + slot_name(ctrl), ctrl->state); break; } - mutex_unlock(&p_slot->lock); + mutex_unlock(&ctrl->lock); } -void pciehp_handle_disable_request(struct slot *slot) +void pciehp_handle_disable_request(struct controller *ctrl) { - struct controller *ctrl = slot->ctrl; - - mutex_lock(&slot->lock); - switch (slot->state) { + mutex_lock(&ctrl->lock); + switch (ctrl->state) { case BLINKINGON_STATE: case BLINKINGOFF_STATE: - cancel_delayed_work(&slot->work); + cancel_delayed_work(&ctrl->work); break; } - slot->state = POWEROFF_STATE; - mutex_unlock(&slot->lock); + ctrl->state = POWEROFF_STATE; + mutex_unlock(&ctrl->lock); - ctrl->request_result = pciehp_disable_slot(slot, SAFE_REMOVAL); + ctrl->request_result = pciehp_disable_slot(ctrl, SAFE_REMOVAL); } -void pciehp_handle_presence_or_link_change(struct slot *slot, u32 events) +void pciehp_handle_presence_or_link_change(struct controller *ctrl, u32 events) { - struct controller *ctrl = slot->ctrl; bool present, link_active; /* * If the slot is on and presence or link has changed, turn it off. * Even if it's occupied again, we cannot assume the card is the same. */ - mutex_lock(&slot->lock); - switch (slot->state) { + mutex_lock(&ctrl->lock); + switch (ctrl->state) { case BLINKINGOFF_STATE: - cancel_delayed_work(&slot->work); + cancel_delayed_work(&ctrl->work); /* fall through */ case ON_STATE: - slot->state = POWEROFF_STATE; - mutex_unlock(&slot->lock); + ctrl->state = POWEROFF_STATE; + mutex_unlock(&ctrl->lock); if (events & PCI_EXP_SLTSTA_DLLSC) ctrl_info(ctrl, "Slot(%s): Link Down\n", - slot_name(slot)); + slot_name(ctrl)); if (events & PCI_EXP_SLTSTA_PDC) ctrl_info(ctrl, "Slot(%s): Card not present\n", - slot_name(slot)); - pciehp_disable_slot(slot, SURPRISE_REMOVAL); + slot_name(ctrl)); + pciehp_disable_slot(ctrl, SURPRISE_REMOVAL); break; default: - mutex_unlock(&slot->lock); + mutex_unlock(&ctrl->lock); break; } /* Turn the slot on if it's occupied or link is up */ - mutex_lock(&slot->lock); + mutex_lock(&ctrl->lock); present = pciehp_card_present(ctrl); link_active = pciehp_check_link_active(ctrl); if (!present && !link_active) { - mutex_unlock(&slot->lock); + mutex_unlock(&ctrl->lock); return; } - switch (slot->state) { + switch (ctrl->state) { case BLINKINGON_STATE: - cancel_delayed_work(&slot->work); + cancel_delayed_work(&ctrl->work); /* fall through */ case OFF_STATE: - slot->state = POWERON_STATE; - mutex_unlock(&slot->lock); + ctrl->state = POWERON_STATE; + mutex_unlock(&ctrl->lock); if (present) ctrl_info(ctrl, "Slot(%s): Card present\n", - slot_name(slot)); + slot_name(ctrl)); if (link_active) ctrl_info(ctrl, "Slot(%s): Link Up\n", - slot_name(slot)); - ctrl->request_result = pciehp_enable_slot(slot); + slot_name(ctrl)); + ctrl->request_result = pciehp_enable_slot(ctrl); break; default: - mutex_unlock(&slot->lock); + mutex_unlock(&ctrl->lock); break; } } -static int __pciehp_enable_slot(struct slot *p_slot) +static int __pciehp_enable_slot(struct controller *ctrl) { u8 getstatus = 0; - struct controller *ctrl = p_slot->ctrl; - if (MRL_SENS(p_slot->ctrl)) { - pciehp_get_latch_status(p_slot, &getstatus); + if (MRL_SENS(ctrl)) { + pciehp_get_latch_status(ctrl, &getstatus); if (getstatus) { ctrl_info(ctrl, "Slot(%s): Latch open\n", - slot_name(p_slot)); + slot_name(ctrl)); return -ENODEV; } } - if (POWER_CTRL(p_slot->ctrl)) { - pciehp_get_power_status(p_slot, &getstatus); + if (POWER_CTRL(ctrl)) { + pciehp_get_power_status(ctrl, &getstatus); if (getstatus) { ctrl_info(ctrl, "Slot(%s): Already enabled\n", - slot_name(p_slot)); + slot_name(ctrl)); return 0; } } - return board_added(p_slot); + return board_added(ctrl); } -static int pciehp_enable_slot(struct slot *slot) +static int pciehp_enable_slot(struct controller *ctrl) { - struct controller *ctrl = slot->ctrl; int ret; pm_runtime_get_sync(&ctrl->pcie->port->dev); - ret = __pciehp_enable_slot(slot); + ret = __pciehp_enable_slot(ctrl); if (ret && ATTN_BUTTN(ctrl)) - pciehp_green_led_off(slot); /* may be blinking */ + pciehp_green_led_off(ctrl); /* may be blinking */ pm_runtime_put(&ctrl->pcie->port->dev); - mutex_lock(&slot->lock); - slot->state = ret ? OFF_STATE : ON_STATE; - mutex_unlock(&slot->lock); + mutex_lock(&ctrl->lock); + ctrl->state = ret ? OFF_STATE : ON_STATE; + mutex_unlock(&ctrl->lock); return ret; } -static int __pciehp_disable_slot(struct slot *p_slot, bool safe_removal) +static int __pciehp_disable_slot(struct controller *ctrl, bool safe_removal) { u8 getstatus = 0; - struct controller *ctrl = p_slot->ctrl; - if (POWER_CTRL(p_slot->ctrl)) { - pciehp_get_power_status(p_slot, &getstatus); + if (POWER_CTRL(ctrl)) { + pciehp_get_power_status(ctrl, &getstatus); if (!getstatus) { ctrl_info(ctrl, "Slot(%s): Already disabled\n", - slot_name(p_slot)); + slot_name(ctrl)); return -EINVAL; } } - remove_board(p_slot, safe_removal); + remove_board(ctrl, safe_removal); return 0; } -static int pciehp_disable_slot(struct slot *slot, bool safe_removal) +static int pciehp_disable_slot(struct controller *ctrl, bool safe_removal) { - struct controller *ctrl = slot->ctrl; int ret; pm_runtime_get_sync(&ctrl->pcie->port->dev); - ret = __pciehp_disable_slot(slot, safe_removal); + ret = __pciehp_disable_slot(ctrl, safe_removal); pm_runtime_put(&ctrl->pcie->port->dev); - mutex_lock(&slot->lock); - slot->state = OFF_STATE; - mutex_unlock(&slot->lock); + mutex_lock(&ctrl->lock); + ctrl->state = OFF_STATE; + mutex_unlock(&ctrl->lock); return ret; } int pciehp_sysfs_enable_slot(struct hotplug_slot *hotplug_slot) { - struct slot *p_slot = hotplug_slot->private; - struct controller *ctrl = p_slot->ctrl; + struct controller *ctrl = hotplug_slot->private; - mutex_lock(&p_slot->lock); - switch (p_slot->state) { + mutex_lock(&ctrl->lock); + switch (ctrl->state) { case BLINKINGON_STATE: case OFF_STATE: - mutex_unlock(&p_slot->lock); + mutex_unlock(&ctrl->lock); /* * The IRQ thread becomes a no-op if the user pulls out the * card before the thread wakes up, so initialize to -ENODEV. @@ -379,54 +366,53 @@ int pciehp_sysfs_enable_slot(struct hotplug_slot *hotplug_slot) return ctrl->request_result; case POWERON_STATE: ctrl_info(ctrl, "Slot(%s): Already in powering on state\n", - slot_name(p_slot)); + slot_name(ctrl)); break; case BLINKINGOFF_STATE: case ON_STATE: case POWEROFF_STATE: ctrl_info(ctrl, "Slot(%s): Already enabled\n", - slot_name(p_slot)); + slot_name(ctrl)); break; default: ctrl_err(ctrl, "Slot(%s): Invalid state %#x\n", - slot_name(p_slot), p_slot->state); + slot_name(ctrl), ctrl->state); break; } - mutex_unlock(&p_slot->lock); + mutex_unlock(&ctrl->lock); return -ENODEV; } int pciehp_sysfs_disable_slot(struct hotplug_slot *hotplug_slot) { - struct slot *p_slot = hotplug_slot->private; - struct controller *ctrl = p_slot->ctrl; + struct controller *ctrl = hotplug_slot->private; - mutex_lock(&p_slot->lock); - switch (p_slot->state) { + mutex_lock(&ctrl->lock); + switch (ctrl->state) { case BLINKINGOFF_STATE: case ON_STATE: - mutex_unlock(&p_slot->lock); + mutex_unlock(&ctrl->lock); pciehp_request(ctrl, DISABLE_SLOT); wait_event(ctrl->requester, !atomic_read(&ctrl->pending_events)); return ctrl->request_result; case POWEROFF_STATE: ctrl_info(ctrl, "Slot(%s): Already in powering off state\n", - slot_name(p_slot)); + slot_name(ctrl)); break; case BLINKINGON_STATE: case OFF_STATE: case POWERON_STATE: ctrl_info(ctrl, "Slot(%s): Already disabled\n", - slot_name(p_slot)); + slot_name(ctrl)); break; default: ctrl_err(ctrl, "Slot(%s): Invalid state %#x\n", - slot_name(p_slot), p_slot->state); + slot_name(ctrl), ctrl->state); break; } - mutex_unlock(&p_slot->lock); + mutex_unlock(&ctrl->lock); return -ENODEV; } diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c index d6cd4fbc72da..fa3759c4ab02 100644 --- a/drivers/pci/hotplug/pciehp_hpc.c +++ b/drivers/pci/hotplug/pciehp_hpc.c @@ -40,7 +40,7 @@ static inline int pciehp_request_irq(struct controller *ctrl) if (pciehp_poll_mode) { ctrl->poll_thread = kthread_run(&pciehp_poll, ctrl, "pciehp_poll-%s", - slot_name(ctrl->slot)); + slot_name(ctrl)); return PTR_ERR_OR_ZERO(ctrl->poll_thread); } @@ -315,8 +315,8 @@ static int pciehp_link_enable(struct controller *ctrl) int pciehp_get_raw_indicator_status(struct hotplug_slot *hotplug_slot, u8 *status) { - struct slot *slot = hotplug_slot->private; - struct pci_dev *pdev = ctrl_dev(slot->ctrl); + struct controller *ctrl = hotplug_slot->private; + struct pci_dev *pdev = ctrl_dev(ctrl); u16 slot_ctrl; pci_config_pm_runtime_get(pdev); @@ -328,8 +328,7 @@ int pciehp_get_raw_indicator_status(struct hotplug_slot *hotplug_slot, int pciehp_get_attention_status(struct hotplug_slot *hotplug_slot, u8 *status) { - struct slot *slot = hotplug_slot->private; - struct controller *ctrl = slot->ctrl; + struct controller *ctrl = hotplug_slot->private; struct pci_dev *pdev = ctrl_dev(ctrl); u16 slot_ctrl; @@ -357,9 +356,8 @@ int pciehp_get_attention_status(struct hotplug_slot *hotplug_slot, u8 *status) return 0; } -void pciehp_get_power_status(struct slot *slot, u8 *status) +void pciehp_get_power_status(struct controller *ctrl, u8 *status) { - struct controller *ctrl = slot->ctrl; struct pci_dev *pdev = ctrl_dev(ctrl); u16 slot_ctrl; @@ -380,9 +378,9 @@ void pciehp_get_power_status(struct slot *slot, u8 *status) } } -void pciehp_get_latch_status(struct slot *slot, u8 *status) +void pciehp_get_latch_status(struct controller *ctrl, u8 *status) { - struct pci_dev *pdev = ctrl_dev(slot->ctrl); + struct pci_dev *pdev = ctrl_dev(ctrl); u16 slot_status; pcie_capability_read_word(pdev, PCI_EXP_SLTSTA, &slot_status); @@ -412,9 +410,9 @@ bool pciehp_card_present_or_link_active(struct controller *ctrl) return pciehp_card_present(ctrl) || pciehp_check_link_active(ctrl); } -int pciehp_query_power_fault(struct slot *slot) +int pciehp_query_power_fault(struct controller *ctrl) { - struct pci_dev *pdev = ctrl_dev(slot->ctrl); + struct pci_dev *pdev = ctrl_dev(ctrl); u16 slot_status; pcie_capability_read_word(pdev, PCI_EXP_SLTSTA, &slot_status); @@ -424,8 +422,7 @@ int pciehp_query_power_fault(struct slot *slot) int pciehp_set_raw_indicator_status(struct hotplug_slot *hotplug_slot, u8 status) { - struct slot *slot = hotplug_slot->private; - struct controller *ctrl = slot->ctrl; + struct controller *ctrl = hotplug_slot->private; struct pci_dev *pdev = ctrl_dev(ctrl); pci_config_pm_runtime_get(pdev); @@ -435,9 +432,8 @@ int pciehp_set_raw_indicator_status(struct hotplug_slot *hotplug_slot, return 0; } -void pciehp_set_attention_status(struct slot *slot, u8 value) +void pciehp_set_attention_status(struct controller *ctrl, u8 value) { - struct controller *ctrl = slot->ctrl; u16 slot_cmd; if (!ATTN_LED(ctrl)) @@ -461,10 +457,8 @@ void pciehp_set_attention_status(struct slot *slot, u8 value) pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, slot_cmd); } -void pciehp_green_led_on(struct slot *slot) +void pciehp_green_led_on(struct controller *ctrl) { - struct controller *ctrl = slot->ctrl; - if (!PWR_LED(ctrl)) return; @@ -475,10 +469,8 @@ void pciehp_green_led_on(struct slot *slot) PCI_EXP_SLTCTL_PWR_IND_ON); } -void pciehp_green_led_off(struct slot *slot) +void pciehp_green_led_off(struct controller *ctrl) { - struct controller *ctrl = slot->ctrl; - if (!PWR_LED(ctrl)) return; @@ -489,10 +481,8 @@ void pciehp_green_led_off(struct slot *slot) PCI_EXP_SLTCTL_PWR_IND_OFF); } -void pciehp_green_led_blink(struct slot *slot) +void pciehp_green_led_blink(struct controller *ctrl) { - struct controller *ctrl = slot->ctrl; - if (!PWR_LED(ctrl)) return; @@ -503,9 +493,8 @@ void pciehp_green_led_blink(struct slot *slot) PCI_EXP_SLTCTL_PWR_IND_BLINK); } -int pciehp_power_on_slot(struct slot *slot) +int pciehp_power_on_slot(struct controller *ctrl) { - struct controller *ctrl = slot->ctrl; struct pci_dev *pdev = ctrl_dev(ctrl); u16 slot_status; int retval; @@ -529,10 +518,8 @@ int pciehp_power_on_slot(struct slot *slot) return retval; } -void pciehp_power_off_slot(struct slot *slot) +void pciehp_power_off_slot(struct controller *ctrl) { - struct controller *ctrl = slot->ctrl; - pcie_write_cmd(ctrl, PCI_EXP_SLTCTL_PWR_OFF, PCI_EXP_SLTCTL_PCC); ctrl_dbg(ctrl, "%s: SLOTCTRL %x write cmd %x\n", __func__, pci_pcie_cap(ctrl->pcie->port) + PCI_EXP_SLTCTL, @@ -630,7 +617,6 @@ static irqreturn_t pciehp_ist(int irq, void *dev_id) { struct controller *ctrl = (struct controller *)dev_id; struct pci_dev *pdev = ctrl_dev(ctrl); - struct slot *slot = ctrl->slot; irqreturn_t ret; u32 events; @@ -656,16 +642,16 @@ static irqreturn_t pciehp_ist(int irq, void *dev_id) /* Check Attention Button Pressed */ if (events & PCI_EXP_SLTSTA_ABP) { ctrl_info(ctrl, "Slot(%s): Attention button pressed\n", - slot_name(slot)); - pciehp_handle_button_press(slot); + slot_name(ctrl)); + pciehp_handle_button_press(ctrl); } /* Check Power Fault Detected */ if ((events & PCI_EXP_SLTSTA_PFD) && !ctrl->power_fault_detected) { ctrl->power_fault_detected = 1; - ctrl_err(ctrl, "Slot(%s): Power fault\n", slot_name(slot)); - pciehp_set_attention_status(slot, 1); - pciehp_green_led_off(slot); + ctrl_err(ctrl, "Slot(%s): Power fault\n", slot_name(ctrl)); + pciehp_set_attention_status(ctrl, 1); + pciehp_green_led_off(ctrl); } /* @@ -674,9 +660,9 @@ static irqreturn_t pciehp_ist(int irq, void *dev_id) */ down_read(&ctrl->reset_lock); if (events & DISABLE_SLOT) - pciehp_handle_disable_request(slot); + pciehp_handle_disable_request(ctrl); else if (events & (PCI_EXP_SLTSTA_PDC | PCI_EXP_SLTSTA_DLLSC)) - pciehp_handle_presence_or_link_change(slot, events); + pciehp_handle_presence_or_link_change(ctrl, events); up_read(&ctrl->reset_lock); pci_config_pm_runtime_put(pdev); @@ -772,8 +758,7 @@ void pcie_clear_hotplug_events(struct controller *ctrl) */ int pciehp_reset_slot(struct hotplug_slot *hotplug_slot, int probe) { - struct slot *slot = hotplug_slot->private; - struct controller *ctrl = slot->ctrl; + struct controller *ctrl = hotplug_slot->private; struct pci_dev *pdev = ctrl_dev(ctrl); u16 stat_mask = 0, ctrl_mask = 0; int rc; @@ -823,34 +808,6 @@ void pcie_shutdown_notification(struct controller *ctrl) } } -static int pcie_init_slot(struct controller *ctrl) -{ - struct pci_bus *subordinate = ctrl_dev(ctrl)->subordinate; - struct slot *slot; - - slot = kzalloc(sizeof(*slot), GFP_KERNEL); - if (!slot) - return -ENOMEM; - - down_read(&pci_bus_sem); - slot->state = list_empty(&subordinate->devices) ? OFF_STATE : ON_STATE; - up_read(&pci_bus_sem); - - slot->ctrl = ctrl; - mutex_init(&slot->lock); - INIT_DELAYED_WORK(&slot->work, pciehp_queue_pushbutton_work); - ctrl->slot = slot; - return 0; -} - -static void pcie_cleanup_slot(struct controller *ctrl) -{ - struct slot *slot = ctrl->slot; - - cancel_delayed_work_sync(&slot->work); - kfree(slot); -} - static inline void dbg_ctrl(struct controller *ctrl) { struct pci_dev *pdev = ctrl->pcie->port; @@ -874,10 +831,11 @@ struct controller *pcie_init(struct pcie_device *dev) u32 slot_cap, link_cap; u8 poweron; struct pci_dev *pdev = dev->port; + struct pci_bus *subordinate = pdev->subordinate; ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); if (!ctrl) - goto abort; + return NULL; ctrl->pcie = dev; pcie_capability_read_dword(pdev, PCI_EXP_SLTCAP, &slot_cap); @@ -894,11 +852,17 @@ struct controller *pcie_init(struct pcie_device *dev) ctrl->slot_cap = slot_cap; mutex_init(&ctrl->ctrl_lock); + mutex_init(&ctrl->lock); init_rwsem(&ctrl->reset_lock); init_waitqueue_head(&ctrl->requester); init_waitqueue_head(&ctrl->queue); + INIT_DELAYED_WORK(&ctrl->work, pciehp_queue_pushbutton_work); dbg_ctrl(ctrl); + down_read(&pci_bus_sem); + ctrl->state = list_empty(&subordinate->devices) ? OFF_STATE : ON_STATE; + up_read(&pci_bus_sem); + /* Check if Data Link Layer Link Active Reporting is implemented */ pcie_capability_read_dword(pdev, PCI_EXP_LNKCAP, &link_cap); if (link_cap & PCI_EXP_LNKCAP_DLLLARC) @@ -924,32 +888,24 @@ struct controller *pcie_init(struct pcie_device *dev) FLAG(link_cap, PCI_EXP_LNKCAP_DLLLARC), pdev->broken_cmd_compl ? " (with Cmd Compl erratum)" : ""); - if (pcie_init_slot(ctrl)) - goto abort_ctrl; - /* * If empty slot's power status is on, turn power off. The IRQ isn't * requested yet, so avoid triggering a notification with this command. */ if (POWER_CTRL(ctrl)) { - pciehp_get_power_status(ctrl->slot, &poweron); + pciehp_get_power_status(ctrl, &poweron); if (!pciehp_card_present_or_link_active(ctrl) && poweron) { pcie_disable_notification(ctrl); - pciehp_power_off_slot(ctrl->slot); + pciehp_power_off_slot(ctrl); } } return ctrl; - -abort_ctrl: - kfree(ctrl); -abort: - return NULL; } void pciehp_release_ctrl(struct controller *ctrl) { - pcie_cleanup_slot(ctrl); + cancel_delayed_work_sync(&ctrl->work); kfree(ctrl); } diff --git a/drivers/pci/hotplug/pciehp_pci.c b/drivers/pci/hotplug/pciehp_pci.c index 8da87931bd45..b9c1396db6fe 100644 --- a/drivers/pci/hotplug/pciehp_pci.c +++ b/drivers/pci/hotplug/pciehp_pci.c @@ -21,19 +21,18 @@ /** * pciehp_configure_device() - enumerate PCI devices below a hotplug bridge - * @p_slot: PCIe hotplug slot + * @ctrl: PCIe hotplug controller * * Enumerate PCI devices below a hotplug bridge and add them to the system. * Return 0 on success, %-EEXIST if the devices are already enumerated or * %-ENODEV if enumeration failed. */ -int pciehp_configure_device(struct slot *p_slot) +int pciehp_configure_device(struct controller *ctrl) { struct pci_dev *dev; - struct pci_dev *bridge = p_slot->ctrl->pcie->port; + struct pci_dev *bridge = ctrl->pcie->port; struct pci_bus *parent = bridge->subordinate; int num, ret = 0; - struct controller *ctrl = p_slot->ctrl; pci_lock_rescan_remove(); @@ -71,7 +70,7 @@ int pciehp_configure_device(struct slot *p_slot) /** * pciehp_unconfigure_device() - remove PCI devices below a hotplug bridge - * @p_slot: PCIe hotplug slot + * @ctrl: PCIe hotplug controller * @presence: whether the card is still present in the slot; * true for safe removal via sysfs or an Attention Button press, * false for surprise removal @@ -80,12 +79,11 @@ int pciehp_configure_device(struct slot *p_slot) * them from the system. Safely removed devices are quiesced. Surprise * removed devices are marked as such to prevent further accesses. */ -void pciehp_unconfigure_device(struct slot *p_slot, bool presence) +void pciehp_unconfigure_device(struct controller *ctrl, bool presence) { struct pci_dev *dev, *temp; - struct pci_bus *parent = p_slot->ctrl->pcie->port->subordinate; + struct pci_bus *parent = ctrl->pcie->port->subordinate; u16 command; - struct controller *ctrl = p_slot->ctrl; ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:00\n", __func__, pci_domain_nr(parent), parent->number); |