diff options
| -rw-r--r-- | drivers/misc/mei/hw-me.c | 45 | ||||
| -rw-r--r-- | drivers/misc/mei/init.c | 16 | ||||
| -rw-r--r-- | drivers/misc/mei/mei_dev.h | 16 |
3 files changed, 62 insertions, 15 deletions
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index d21e5a761f2..df9b43d81ee 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -222,6 +222,38 @@ static bool mei_me_hw_is_ready(struct mei_device *dev) return (hw->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA; } +static int mei_me_hw_ready_wait(struct mei_device *dev) +{ + int err; + if (mei_me_hw_is_ready(dev)) + return 0; + + mutex_unlock(&dev->device_lock); + err = wait_event_interruptible_timeout(dev->wait_hw_ready, + dev->recvd_hw_ready, MEI_INTEROP_TIMEOUT); + mutex_lock(&dev->device_lock); + if (!err && !dev->recvd_hw_ready) { + dev_err(&dev->pdev->dev, + "wait hw ready failed. status = 0x%x\n", err); + return -ETIMEDOUT; + } + + dev->recvd_hw_ready = false; + return 0; +} + +static int mei_me_hw_start(struct mei_device *dev) +{ + int ret = mei_me_hw_ready_wait(dev); + if (ret) + return ret; + dev_dbg(&dev->pdev->dev, "hw is ready\n"); + + mei_me_host_set_ready(dev); + return ret; +} + + /** * mei_hbuf_filled_slots - gets number of device filled buffer slots * @@ -456,14 +488,9 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id) if (mei_hw_is_ready(dev)) { dev_dbg(&dev->pdev->dev, "we need to start the dev.\n"); - mei_host_set_ready(dev); - - dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n"); - /* link is established * start sending messages. */ - - dev->dev_state = MEI_DEV_INIT_CLIENTS; + dev->recvd_hw_ready = true; + wake_up_interruptible(&dev->wait_hw_ready); - mei_hbm_start_req(dev); mutex_unlock(&dev->device_lock); return IRQ_HANDLED; } else { @@ -521,12 +548,12 @@ end: } static const struct mei_hw_ops mei_me_hw_ops = { - .host_set_ready = mei_me_host_set_ready, .host_is_ready = mei_me_host_is_ready, .hw_is_ready = mei_me_hw_is_ready, .hw_reset = mei_me_hw_reset, - .hw_config = mei_me_hw_config, + .hw_config = mei_me_hw_config, + .hw_start = mei_me_hw_start, .intr_clear = mei_me_intr_clear, .intr_enable = mei_me_intr_enable, diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index 6ec530168af..fc3d97ce830 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -22,6 +22,7 @@ #include <linux/mei.h> #include "mei_dev.h" +#include "hbm.h" #include "client.h" const char *mei_dev_state_str(int state) @@ -47,6 +48,7 @@ void mei_device_init(struct mei_device *dev) /* setup our list array */ INIT_LIST_HEAD(&dev->file_list); mutex_init(&dev->device_lock); + init_waitqueue_head(&dev->wait_hw_ready); init_waitqueue_head(&dev->wait_recvd_msg); init_waitqueue_head(&dev->wait_stop_wd); dev->dev_state = MEI_DEV_INITIALIZING; @@ -176,6 +178,20 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled) dev_warn(&dev->pdev->dev, "unexpected reset: dev_state = %s\n", mei_dev_state_str(dev->dev_state)); + if (!interrupts_enabled) { + dev_dbg(&dev->pdev->dev, "intr not enabled end of reset\n"); + return; + } + + mei_hw_start(dev); + + dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n"); + /* link is established * start sending messages. */ + + dev->dev_state = MEI_DEV_INIT_CLIENTS; + + mei_hbm_start_req(dev); + /* wake up all readings so they can be interrupted */ mei_cl_all_read_wakeup(dev); diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 09a2af4294a..5c30857e91d 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -213,11 +213,11 @@ struct mei_cl { /** struct mei_hw_ops * - * @host_set_ready - notify FW that host side is ready * @host_is_ready - query for host readiness * @hw_is_ready - query if hw is ready * @hw_reset - reset hw + * @hw_start - start hw after reset * @hw_config - configure hw * @intr_clear - clear pending interrupts @@ -237,11 +237,11 @@ struct mei_cl { */ struct mei_hw_ops { - void (*host_set_ready) (struct mei_device *dev); bool (*host_is_ready) (struct mei_device *dev); bool (*hw_is_ready) (struct mei_device *dev); void (*hw_reset) (struct mei_device *dev, bool enable); + int (*hw_start) (struct mei_device *dev); void (*hw_config) (struct mei_device *dev); void (*intr_clear) (struct mei_device *dev); @@ -296,11 +296,14 @@ struct mei_device { */ struct mutex device_lock; /* device lock */ struct delayed_work timer_work; /* MEI timer delayed work (timeouts) */ + + bool recvd_hw_ready; bool recvd_msg; /* * waiting queue for receive message from FW */ + wait_queue_head_t wait_hw_ready; wait_queue_head_t wait_recvd_msg; wait_queue_head_t wait_stop_wd; @@ -465,6 +468,11 @@ static inline void mei_hw_reset(struct mei_device *dev, bool enable) dev->ops->hw_reset(dev, enable); } +static inline void mei_hw_start(struct mei_device *dev) +{ + dev->ops->hw_start(dev); +} + static inline void mei_clear_interrupts(struct mei_device *dev) { dev->ops->intr_clear(dev); @@ -480,10 +488,6 @@ static inline void mei_disable_interrupts(struct mei_device *dev) dev->ops->intr_disable(dev); } -static inline void mei_host_set_ready(struct mei_device *dev) -{ - dev->ops->host_set_ready(dev); -} static inline bool mei_host_is_ready(struct mei_device *dev) { return dev->ops->host_is_ready(dev); |