From 7cb035d9e619a8d20f5d3b9791f8cb5160d19e70 Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Sun, 10 Mar 2013 13:56:08 +0200 Subject: mei: add mei_stop function to stop mei device mei_stop calls mei_reset with disabling the interrupts. It will have the same effect as the open code it replaces in the mei_remove. The reset sequence on remove is required for the Lynx Point LP devices to clean the reset state. mei_stop is called from mei_pci_suspend and mei_remove functions Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/init.c | 18 ++++++++++++++++ drivers/misc/mei/mei_dev.h | 1 + drivers/misc/mei/pci-me.c | 52 +++++++--------------------------------------- 3 files changed, 26 insertions(+), 45 deletions(-) (limited to 'drivers/misc') diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index 6ec530168afb..356179991a2e 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -183,6 +183,24 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) mei_cl_all_write_clear(dev); } +void mei_stop(struct mei_device *dev) +{ + dev_dbg(&dev->pdev->dev, "stopping the device.\n"); + + mutex_lock(&dev->device_lock); + + cancel_delayed_work(&dev->timer_work); + + mei_wd_stop(dev); + + dev->dev_state = MEI_DEV_POWER_DOWN; + mei_reset(dev, 0); + + mutex_unlock(&dev->device_lock); + + flush_scheduled_work(); +} + diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index cb80166161f0..97873812e33b 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -381,6 +381,7 @@ static inline unsigned long mei_secs_to_jiffies(unsigned long sec) void mei_device_init(struct mei_device *dev); void mei_reset(struct mei_device *dev, int interrupts); int mei_hw_init(struct mei_device *dev); +void mei_stop(struct mei_device *dev); /* * MEI interrupt functions prototype diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c index b40ec0601ab0..b8b5c9c3ad03 100644 --- a/drivers/misc/mei/pci-me.c +++ b/drivers/misc/mei/pci-me.c @@ -247,44 +247,14 @@ static void mei_remove(struct pci_dev *pdev) hw = to_me_hw(dev); - mutex_lock(&dev->device_lock); - - cancel_delayed_work(&dev->timer_work); - mei_wd_stop(dev); + dev_err(&pdev->dev, "stop\n"); + mei_stop(dev); mei_pdev = NULL; - if (dev->iamthif_cl.state == MEI_FILE_CONNECTED) { - dev->iamthif_cl.state = MEI_FILE_DISCONNECTING; - mei_cl_disconnect(&dev->iamthif_cl); - } - if (dev->wd_cl.state == MEI_FILE_CONNECTED) { - dev->wd_cl.state = MEI_FILE_DISCONNECTING; - mei_cl_disconnect(&dev->wd_cl); - } - - /* Unregistering watchdog device */ mei_watchdog_unregister(dev); - /* remove entry if already in list */ - dev_dbg(&pdev->dev, "list del iamthif and wd file list.\n"); - - if (dev->open_handle_count > 0) - dev->open_handle_count--; - mei_cl_unlink(&dev->wd_cl); - - if (dev->open_handle_count > 0) - dev->open_handle_count--; - mei_cl_unlink(&dev->iamthif_cl); - - dev->iamthif_current_cb = NULL; - dev->me_clients_num = 0; - - mutex_unlock(&dev->device_lock); - - flush_scheduled_work(); - /* disable interrupts */ mei_disable_interrupts(dev); @@ -308,28 +278,20 @@ static int mei_pci_suspend(struct device *device) { struct pci_dev *pdev = to_pci_dev(device); struct mei_device *dev = pci_get_drvdata(pdev); - int err; if (!dev) return -ENODEV; - mutex_lock(&dev->device_lock); - cancel_delayed_work(&dev->timer_work); + dev_err(&pdev->dev, "suspend\n"); - /* Stop watchdog if exists */ - err = mei_wd_stop(dev); - /* Set new mei state */ - if (dev->dev_state == MEI_DEV_ENABLED || - dev->dev_state == MEI_DEV_RECOVERING_FROM_RESET) { - dev->dev_state = MEI_DEV_POWER_DOWN; - mei_reset(dev, 0); - } - mutex_unlock(&dev->device_lock); + mei_stop(dev); + + mei_disable_interrupts(dev); free_irq(pdev->irq, dev); pci_disable_msi(pdev); - return err; + return 0; } static int mei_pci_resume(struct device *device) -- cgit v1.2.3-59-g8ed1b From 68f8ea184bf7a552b59a38c4b0c7dc243822d2d5 Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Sun, 10 Mar 2013 13:56:07 +0200 Subject: mei: ME hardware reset needs to be synchronized This fixes failure during initialization on Lynx Point LP devices. ME driver needs to release the device from the reset only after the FW has completed its flow and indicated it by delivering an interrupt to the host. This is the correct behavior for all the ME devices yet the the previous versions are less susceptive to the implementation that ignored FW reset completion indication. We add mei_me_hw_reset_release function which is called after reset from the interrupt thread or directly from mei_reset during power down. Signed-off-by: Tomas Winkler Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/hw-me.c | 29 ++++++++++++++++++++--------- 1 file changed, 20 insertions(+), 9 deletions(-) (limited to 'drivers/misc') diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index 45ea7185c003..642c6223fa6c 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -151,6 +151,20 @@ static void mei_me_intr_disable(struct mei_device *dev) mei_hcsr_set(hw, hcsr); } +/** + * mei_me_hw_reset_release - release device from the reset + * + * @dev: the device structure + */ +static void mei_me_hw_reset_release(struct mei_device *dev) +{ + struct mei_me_hw *hw = to_me_hw(dev); + u32 hcsr = mei_hcsr_read(hw); + + hcsr |= H_IG; + hcsr &= ~H_RST; + mei_hcsr_set(hw, hcsr); +} /** * mei_me_hw_reset - resets fw via mei csr register. * @@ -169,18 +183,14 @@ static void mei_me_hw_reset(struct mei_device *dev, bool intr_enable) if (intr_enable) hcsr |= H_IE; else - hcsr &= ~H_IE; - - mei_hcsr_set(hw, hcsr); - - hcsr = mei_hcsr_read(hw) | H_IG; - hcsr &= ~H_RST; + hcsr |= ~H_IE; mei_hcsr_set(hw, hcsr); - hcsr = mei_hcsr_read(hw); + if (dev->dev_state == MEI_DEV_POWER_DOWN) + mei_me_hw_reset_release(dev); - dev_dbg(&dev->pdev->dev, "current HCSR = 0x%08x.\n", hcsr); + dev_dbg(&dev->pdev->dev, "current HCSR = 0x%08x.\n", mei_hcsr_read(hw)); } /** @@ -466,7 +476,8 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id) mutex_unlock(&dev->device_lock); return IRQ_HANDLED; } else { - dev_dbg(&dev->pdev->dev, "FW not ready.\n"); + dev_dbg(&dev->pdev->dev, "Reset Completed.\n"); + mei_me_hw_reset_release(dev); mutex_unlock(&dev->device_lock); return IRQ_HANDLED; } -- cgit v1.2.3-59-g8ed1b From 347e0899b1c75d907f01ac883ca38d37fe9bfa42 Mon Sep 17 00:00:00 2001 From: Andy King Date: Thu, 7 Mar 2013 07:29:08 -0800 Subject: VMCI: Fix process-to-process DRGAMs. When sending between processes, we always schedule a work item. Our work info struct has the message embedded in the middle, which means that we end up overwriting subsequent fields when we copy the (variable-length) message into it. Move it to the end of the struct. Acked-by: Dmitry Torokhov Signed-off-by: Andy King Signed-off-by: Greg Kroah-Hartman --- drivers/misc/vmw_vmci/vmci_datagram.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/misc') diff --git a/drivers/misc/vmw_vmci/vmci_datagram.c b/drivers/misc/vmw_vmci/vmci_datagram.c index ed5c433cd493..f3cdd904fe4d 100644 --- a/drivers/misc/vmw_vmci/vmci_datagram.c +++ b/drivers/misc/vmw_vmci/vmci_datagram.c @@ -42,9 +42,11 @@ struct datagram_entry { struct delayed_datagram_info { struct datagram_entry *entry; - struct vmci_datagram msg; struct work_struct work; bool in_dg_host_queue; + /* msg and msg_payload must be together. */ + struct vmci_datagram msg; + u8 msg_payload[]; }; /* Number of in-flight host->host datagrams */ -- cgit v1.2.3-59-g8ed1b