diff options
| -rw-r--r-- | drivers/misc/mei/bus.c | 2 | ||||
| -rw-r--r-- | drivers/misc/mei/client.c | 159 | ||||
| -rw-r--r-- | drivers/misc/mei/client.h | 3 | ||||
| -rw-r--r-- | drivers/misc/mei/hbm.c | 8 | ||||
| -rw-r--r-- | drivers/misc/mei/interrupt.c | 46 | ||||
| -rw-r--r-- | drivers/misc/mei/main.c | 9 | ||||
| -rw-r--r-- | drivers/misc/mei/mei_dev.h | 3 |
7 files changed, 134 insertions, 96 deletions
diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 4cf38c39878a..873c1b6e45e8 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -480,8 +480,6 @@ int mei_cl_disable_device(struct mei_cl_device *device) goto out; } - cl->state = MEI_FILE_DISCONNECTING; - err = mei_cl_disconnect(cl); if (err < 0) { dev_err(dev->dev, "Could not disconnect from the ME client"); diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c index 1e99ef6a54a2..e572ecd5a68d 100644 --- a/drivers/misc/mei/client.c +++ b/drivers/misc/mei/client.c @@ -546,6 +546,7 @@ void mei_cl_init(struct mei_cl *cl, struct mei_device *dev) INIT_LIST_HEAD(&cl->link); INIT_LIST_HEAD(&cl->device_link); cl->writing_state = MEI_IDLE; + cl->state = MEI_FILE_INITIALIZING; cl->dev = dev; } @@ -715,6 +716,88 @@ bool mei_hbuf_acquire(struct mei_device *dev) } /** + * mei_cl_set_disconnected - set disconnected state and clear + * associated states and resources + * + * @cl: host client + */ +void mei_cl_set_disconnected(struct mei_cl *cl) +{ + struct mei_device *dev = cl->dev; + + if (cl->state == MEI_FILE_DISCONNECTED || + cl->state == MEI_FILE_INITIALIZING) + return; + + cl->state = MEI_FILE_DISCONNECTED; + mei_io_list_flush(&dev->ctrl_rd_list, cl); + mei_io_list_flush(&dev->ctrl_wr_list, cl); + cl->mei_flow_ctrl_creds = 0; + cl->timer_count = 0; +} + +/* + * mei_cl_send_disconnect - send disconnect request + * + * @cl: host client + * @cb: callback block + * + * Return: 0, OK; otherwise, error. + */ +static int mei_cl_send_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb) +{ + struct mei_device *dev; + int ret; + + dev = cl->dev; + + ret = mei_hbm_cl_disconnect_req(dev, cl); + cl->status = ret; + if (ret) { + cl->state = MEI_FILE_DISCONNECT_REPLY; + return ret; + } + + list_move_tail(&cb->list, &dev->ctrl_rd_list.list); + cl->timer_count = MEI_CONNECT_TIMEOUT; + + return 0; +} + +/** + * mei_cl_irq_disconnect - processes close related operation from + * interrupt thread context - send disconnect request + * + * @cl: client + * @cb: callback block. + * @cmpl_list: complete list. + * + * Return: 0, OK; otherwise, error. + */ +int mei_cl_irq_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb, + struct mei_cl_cb *cmpl_list) +{ + struct mei_device *dev = cl->dev; + u32 msg_slots; + int slots; + int ret; + + msg_slots = mei_data2slots(sizeof(struct hbm_client_connect_request)); + slots = mei_hbuf_empty_slots(dev); + + if (slots < msg_slots) + return -EMSGSIZE; + + ret = mei_cl_send_disconnect(cl, cb); + if (ret) + list_move_tail(&cb->list, &cmpl_list->list); + + return ret; +} + + + +/** * mei_cl_disconnect - disconnect host client from the me one * * @cl: host client @@ -736,7 +819,7 @@ int mei_cl_disconnect(struct mei_cl *cl) cl_dbg(dev, cl, "disconnecting"); - if (cl->state != MEI_FILE_DISCONNECTING) + if (!mei_cl_is_connected(cl)) return 0; rets = pm_runtime_get(dev->dev); @@ -746,44 +829,41 @@ int mei_cl_disconnect(struct mei_cl *cl) return rets; } + cl->state = MEI_FILE_DISCONNECTING; + cb = mei_io_cb_init(cl, MEI_FOP_DISCONNECT, NULL); rets = cb ? 0 : -ENOMEM; if (rets) - goto free; + goto out; + + cl_dbg(dev, cl, "add disconnect cb to control write list\n"); + list_add_tail(&cb->list, &dev->ctrl_wr_list.list); if (mei_hbuf_acquire(dev)) { - if (mei_hbm_cl_disconnect_req(dev, cl)) { - rets = -ENODEV; + rets = mei_cl_send_disconnect(cl, cb); + if (rets) { cl_err(dev, cl, "failed to disconnect.\n"); - goto free; + goto out; } - cl->timer_count = MEI_CONNECT_TIMEOUT; - mdelay(10); /* Wait for hardware disconnection ready */ - list_add_tail(&cb->list, &dev->ctrl_rd_list.list); - } else { - cl_dbg(dev, cl, "add disconnect cb to control write list\n"); - list_add_tail(&cb->list, &dev->ctrl_wr_list.list); - } - mutex_unlock(&dev->device_lock); - - wait_event_timeout(cl->wait, - MEI_FILE_DISCONNECTED == cl->state, - mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT)); + mutex_unlock(&dev->device_lock); + wait_event_timeout(cl->wait, cl->state == MEI_FILE_DISCONNECT_REPLY, + mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT)); mutex_lock(&dev->device_lock); - if (MEI_FILE_DISCONNECTED == cl->state) { - rets = 0; - cl_dbg(dev, cl, "successfully disconnected from FW client.\n"); - } else { + rets = cl->status; + if (cl->state != MEI_FILE_DISCONNECT_REPLY) { cl_dbg(dev, cl, "timeout on disconnect from FW client.\n"); rets = -ETIME; } - mei_io_list_flush(&dev->ctrl_rd_list, cl); - mei_io_list_flush(&dev->ctrl_wr_list, cl); -free: +out: + /* we disconnect also on error */ + mei_cl_set_disconnected(cl); + if (!rets) + cl_dbg(dev, cl, "successfully disconnected from FW client.\n"); + cl_dbg(dev, cl, "rpm: autosuspend\n"); pm_runtime_mark_last_busy(dev->dev); pm_runtime_put_autosuspend(dev->dev); @@ -872,18 +952,15 @@ int mei_cl_connect(struct mei_cl *cl, struct file *file) mutex_unlock(&dev->device_lock); wait_event_timeout(cl->wait, (cl->state == MEI_FILE_CONNECTED || - cl->state == MEI_FILE_DISCONNECTED), + cl->state == MEI_FILE_DISCONNECT_REPLY), mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT)); mutex_lock(&dev->device_lock); if (!mei_cl_is_connected(cl)) { - cl->state = MEI_FILE_DISCONNECTED; /* something went really wrong */ if (!cl->status) cl->status = -EFAULT; - - mei_io_list_flush(&dev->ctrl_rd_list, cl); - mei_io_list_flush(&dev->ctrl_wr_list, cl); + mei_cl_set_disconnected(cl); } rets = cl->status; @@ -1289,20 +1366,30 @@ err: */ void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb) { - if (cb->fop_type == MEI_FOP_WRITE) { + switch (cb->fop_type) { + case MEI_FOP_WRITE: mei_io_cb_free(cb); - cb = NULL; cl->writing_state = MEI_WRITE_COMPLETE; if (waitqueue_active(&cl->tx_wait)) wake_up_interruptible(&cl->tx_wait); + break; - } else if (cb->fop_type == MEI_FOP_READ) { + case MEI_FOP_READ: list_add_tail(&cb->list, &cl->rd_completed); if (waitqueue_active(&cl->rx_wait)) wake_up_interruptible_all(&cl->rx_wait); else mei_cl_bus_rx_event(cl); + break; + + case MEI_FOP_CONNECT: + case MEI_FOP_DISCONNECT: + if (waitqueue_active(&cl->wait)) + wake_up(&cl->wait); + break; + default: + BUG_ON(0); } } @@ -1312,16 +1399,12 @@ void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb) * * @dev: mei device */ - void mei_cl_all_disconnect(struct mei_device *dev) { struct mei_cl *cl; - list_for_each_entry(cl, &dev->file_list, link) { - cl->state = MEI_FILE_DISCONNECTED; - cl->mei_flow_ctrl_creds = 0; - cl->timer_count = 0; - } + list_for_each_entry(cl, &dev->file_list, link) + mei_cl_set_disconnected(cl); } diff --git a/drivers/misc/mei/client.h b/drivers/misc/mei/client.h index 0a39e5d45171..57ce177d5b3a 100644 --- a/drivers/misc/mei/client.h +++ b/drivers/misc/mei/client.h @@ -105,6 +105,9 @@ static inline bool mei_cl_is_connected(struct mei_cl *cl) bool mei_cl_is_other_connecting(struct mei_cl *cl); int mei_cl_disconnect(struct mei_cl *cl); +void mei_cl_set_disconnected(struct mei_cl *cl); +int mei_cl_irq_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb, + struct mei_cl_cb *cmpl_list); int mei_cl_connect(struct mei_cl *cl, struct file *file); int mei_cl_read_start(struct mei_cl *cl, size_t length, struct file *fp); int mei_cl_irq_read_msg(struct mei_cl *cl, struct mei_msg_hdr *hdr, diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c index 58da92565c5e..410e0297527e 100644 --- a/drivers/misc/mei/hbm.c +++ b/drivers/misc/mei/hbm.c @@ -572,7 +572,7 @@ static void mei_hbm_cl_disconnect_res(struct mei_device *dev, struct mei_cl *cl, cl_dbg(dev, cl, "hbm: disconnect response status=%d\n", rs->status); if (rs->status == MEI_CL_DISCONN_SUCCESS) - cl->state = MEI_FILE_DISCONNECTED; + cl->state = MEI_FILE_DISCONNECT_REPLY; cl->status = 0; } @@ -611,7 +611,7 @@ static void mei_hbm_cl_connect_res(struct mei_device *dev, struct mei_cl *cl, if (rs->status == MEI_CL_CONN_SUCCESS) cl->state = MEI_FILE_CONNECTED; else - cl->state = MEI_FILE_DISCONNECTED; + cl->state = MEI_FILE_DISCONNECT_REPLY; cl->status = mei_cl_conn_status_to_errno(rs->status); } @@ -680,8 +680,8 @@ static int mei_hbm_fw_disconnect_req(struct mei_device *dev, cl = mei_hbm_cl_find_by_cmd(dev, disconnect_req); if (cl) { - cl_dbg(dev, cl, "disconnect request received\n"); - cl->state = MEI_FILE_DISCONNECTED; + cl_dbg(dev, cl, "fw disconnect request received\n"); + cl->state = MEI_FILE_DISCONNECTING; cl->timer_count = 0; cb = mei_io_cb_init(cl, MEI_FOP_DISCONNECT_RSP, NULL); diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index 3f84d2edcde4..6fd7ca9b3119 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -180,56 +180,12 @@ static int mei_cl_irq_disconnect_rsp(struct mei_cl *cl, struct mei_cl_cb *cb, return -EMSGSIZE; ret = mei_hbm_cl_disconnect_rsp(dev, cl); - - cl->state = MEI_FILE_DISCONNECTED; - cl->status = 0; + mei_cl_set_disconnected(cl); mei_io_cb_free(cb); return ret; } - - -/** - * mei_cl_irq_disconnect - processes close related operation from - * interrupt thread context - send disconnect request - * - * @cl: client - * @cb: callback block. - * @cmpl_list: complete list. - * - * Return: 0, OK; otherwise, error. - */ -static int mei_cl_irq_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb, - struct mei_cl_cb *cmpl_list) -{ - struct mei_device *dev = cl->dev; - u32 msg_slots; - int slots; - - msg_slots = mei_data2slots(sizeof(struct hbm_client_connect_request)); - slots = mei_hbuf_empty_slots(dev); - - if (slots < msg_slots) - return -EMSGSIZE; - - if (mei_hbm_cl_disconnect_req(dev, cl)) { - cl->status = 0; - cb->buf_idx = 0; - list_move_tail(&cb->list, &cmpl_list->list); - return -EIO; - } - - cl->state = MEI_FILE_DISCONNECTING; - cl->status = 0; - cb->buf_idx = 0; - list_move_tail(&cb->list, &dev->ctrl_rd_list.list); - cl->timer_count = MEI_CONNECT_TIMEOUT; - - return 0; -} - - /** * mei_cl_irq_read - processes client read related operation from the * interrupt thread context - request for flow control credits diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index 3e2968159506..3d205d10d21c 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -94,7 +94,7 @@ static int mei_release(struct inode *inode, struct file *file) { struct mei_cl *cl = file->private_data; struct mei_device *dev; - int rets = 0; + int rets; if (WARN_ON(!cl || !cl->dev)) return -ENODEV; @@ -106,11 +106,8 @@ static int mei_release(struct inode *inode, struct file *file) rets = mei_amthif_release(dev, file); goto out; } - if (mei_cl_is_connected(cl)) { - cl->state = MEI_FILE_DISCONNECTING; - cl_dbg(dev, cl, "disconnecting\n"); - rets = mei_cl_disconnect(cl); - } + rets = mei_cl_disconnect(cl); + mei_cl_flush_queues(cl, file); cl_dbg(dev, cl, "removing\n"); diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index f066ecd71939..7b039f8ddb8f 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -88,7 +88,8 @@ enum file_state { MEI_FILE_CONNECTING, MEI_FILE_CONNECTED, MEI_FILE_DISCONNECTING, - MEI_FILE_DISCONNECTED + MEI_FILE_DISCONNECT_REPLY, + MEI_FILE_DISCONNECTED, }; /* MEI device states */ |