From e09b41010ba33a20a87472ee821fa407a5b8da36 Mon Sep 17 00:00:00 2001 From: José Pekkarinen Date: Mon, 11 Apr 2016 10:41:07 +0300 Subject: These changes are the raw update to linux-4.4.6-rt14. Kernel sources are taken from kernel.org, and rt patch from the rt wiki download page. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen --- kernel/drivers/misc/mei/client.c | 764 ++++++++++++++++++++++++++++++--------- 1 file changed, 600 insertions(+), 164 deletions(-) (limited to 'kernel/drivers/misc/mei/client.c') diff --git a/kernel/drivers/misc/mei/client.c b/kernel/drivers/misc/mei/client.c index b2b9f4382..a6c87c713 100644 --- a/kernel/drivers/misc/mei/client.c +++ b/kernel/drivers/misc/mei/client.c @@ -83,7 +83,7 @@ void mei_me_cl_put(struct mei_me_client *me_cl) } /** - * __mei_me_cl_del - delete me client form the list and decrease + * __mei_me_cl_del - delete me client from the list and decrease * reference counter * * @dev: mei device @@ -96,10 +96,24 @@ static void __mei_me_cl_del(struct mei_device *dev, struct mei_me_client *me_cl) if (!me_cl) return; - list_del(&me_cl->list); + list_del_init(&me_cl->list); mei_me_cl_put(me_cl); } +/** + * mei_me_cl_del - delete me client from the list and decrease + * reference counter + * + * @dev: mei device + * @me_cl: me client + */ +void mei_me_cl_del(struct mei_device *dev, struct mei_me_client *me_cl) +{ + down_write(&dev->me_clients_rwsem); + __mei_me_cl_del(dev, me_cl); + up_write(&dev->me_clients_rwsem); +} + /** * mei_me_cl_add - add me client to the list * @@ -317,7 +331,7 @@ static inline bool mei_cl_cmp_id(const struct mei_cl *cl1, { return cl1 && cl2 && (cl1->host_client_id == cl2->host_client_id) && - (cl1->me_client_id == cl2->me_client_id); + (mei_cl_me_id(cl1) == mei_cl_me_id(cl2)); } /** @@ -541,11 +555,12 @@ void mei_cl_init(struct mei_cl *cl, struct mei_device *dev) init_waitqueue_head(&cl->wait); init_waitqueue_head(&cl->rx_wait); init_waitqueue_head(&cl->tx_wait); + init_waitqueue_head(&cl->ev_wait); INIT_LIST_HEAD(&cl->rd_completed); INIT_LIST_HEAD(&cl->rd_pending); INIT_LIST_HEAD(&cl->link); - INIT_LIST_HEAD(&cl->device_link); cl->writing_state = MEI_IDLE; + cl->state = MEI_FILE_INITIALIZING; cl->dev = dev; } @@ -619,7 +634,7 @@ int mei_cl_link(struct mei_cl *cl, int id) } /** - * mei_cl_unlink - remove me_cl from the list + * mei_cl_unlink - remove host client from the list * * @cl: host client * @@ -667,24 +682,20 @@ void mei_host_client_init(struct work_struct *work) me_cl = mei_me_cl_by_uuid(dev, &mei_amthif_guid); if (me_cl) - mei_amthif_host_init(dev); + mei_amthif_host_init(dev, me_cl); mei_me_cl_put(me_cl); me_cl = mei_me_cl_by_uuid(dev, &mei_wd_guid); if (me_cl) - mei_wd_host_init(dev); + mei_wd_host_init(dev, me_cl); mei_me_cl_put(me_cl); - me_cl = mei_me_cl_by_uuid(dev, &mei_nfc_guid); - if (me_cl) - mei_nfc_host_init(dev); - mei_me_cl_put(me_cl); - - dev->dev_state = MEI_DEV_ENABLED; dev->reset_count = 0; mutex_unlock(&dev->device_lock); + mei_cl_bus_rescan(dev); + pm_runtime_mark_last_busy(dev->dev); dev_dbg(dev->dev, "rpm: autosuspend\n"); pm_runtime_autosuspend(dev->dev); @@ -714,6 +725,173 @@ bool mei_hbuf_acquire(struct mei_device *dev) return true; } +/** + * 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; + + if (!cl->me_cl) + return; + + if (!WARN_ON(cl->me_cl->connect_count == 0)) + cl->me_cl->connect_count--; + + if (cl->me_cl->connect_count == 0) + cl->me_cl->mei_flow_ctrl_creds = 0; + + mei_me_cl_put(cl->me_cl); + cl->me_cl = NULL; +} + +static int mei_cl_set_connecting(struct mei_cl *cl, struct mei_me_client *me_cl) +{ + if (!mei_me_cl_get(me_cl)) + return -ENOENT; + + /* only one connection is allowed for fixed address clients */ + if (me_cl->props.fixed_address) { + if (me_cl->connect_count) { + mei_me_cl_put(me_cl); + return -EBUSY; + } + } + + cl->me_cl = me_cl; + cl->state = MEI_FILE_CONNECTING; + cl->me_cl->connect_count++; + + return 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 + * internal function runtime pm has to be already acquired + * + * @cl: host client + * + * Return: 0 on success, <0 on failure. + */ +static int __mei_cl_disconnect(struct mei_cl *cl) +{ + struct mei_device *dev; + struct mei_cl_cb *cb; + int rets; + + dev = cl->dev; + + cl->state = MEI_FILE_DISCONNECTING; + + cb = mei_io_cb_init(cl, MEI_FOP_DISCONNECT, NULL); + rets = cb ? 0 : -ENOMEM; + if (rets) + 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)) { + rets = mei_cl_send_disconnect(cl, cb); + if (rets) { + cl_err(dev, cl, "failed to disconnect.\n"); + goto out; + } + } + + 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); + + rets = cl->status; + if (cl->state != MEI_FILE_DISCONNECT_REPLY) { + cl_dbg(dev, cl, "timeout on disconnect from FW client.\n"); + rets = -ETIME; + } + +out: + /* we disconnect also on error */ + mei_cl_set_disconnected(cl); + if (!rets) + cl_dbg(dev, cl, "successfully disconnected from FW client.\n"); + + mei_io_cb_free(cb); + return rets; +} + /** * mei_cl_disconnect - disconnect host client from the me one * @@ -726,7 +904,6 @@ bool mei_hbuf_acquire(struct mei_device *dev) int mei_cl_disconnect(struct mei_cl *cl) { struct mei_device *dev; - struct mei_cl_cb *cb; int rets; if (WARN_ON(!cl || !cl->dev)) @@ -736,9 +913,14 @@ 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; + if (mei_cl_is_fixed_address(cl)) { + mei_cl_set_disconnected(cl); + return 0; + } + rets = pm_runtime_get(dev->dev); if (rets < 0 && rets != -EINPROGRESS) { pm_runtime_put_noidle(dev->dev); @@ -746,49 +928,12 @@ int mei_cl_disconnect(struct mei_cl *cl) return rets; } - cb = mei_io_cb_init(cl, MEI_FOP_DISCONNECT, NULL); - rets = cb ? 0 : -ENOMEM; - if (rets) - goto free; + rets = __mei_cl_disconnect(cl); - if (mei_hbuf_acquire(dev)) { - if (mei_hbm_cl_disconnect_req(dev, cl)) { - rets = -ENODEV; - cl_err(dev, cl, "failed to disconnect.\n"); - goto free; - } - 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_lock(&dev->device_lock); - - if (MEI_FILE_DISCONNECTED == cl->state) { - rets = 0; - cl_dbg(dev, cl, "successfully disconnected from FW client.\n"); - } else { - 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: cl_dbg(dev, cl, "rpm: autosuspend\n"); pm_runtime_mark_last_busy(dev->dev); pm_runtime_put_autosuspend(dev->dev); - mei_io_cb_free(cb); return rets; } @@ -801,53 +946,119 @@ free: * * Return: true if other client is connected, false - otherwise. */ -bool mei_cl_is_other_connecting(struct mei_cl *cl) +static bool mei_cl_is_other_connecting(struct mei_cl *cl) { struct mei_device *dev; - struct mei_cl *ocl; /* the other client */ - - if (WARN_ON(!cl || !cl->dev)) - return false; + struct mei_cl_cb *cb; dev = cl->dev; - list_for_each_entry(ocl, &dev->file_list, link) { - if (ocl->state == MEI_FILE_CONNECTING && - ocl != cl && - cl->me_client_id == ocl->me_client_id) + list_for_each_entry(cb, &dev->ctrl_rd_list.list, list) { + if (cb->fop_type == MEI_FOP_CONNECT && + mei_cl_me_id(cl) == mei_cl_me_id(cb->cl)) return true; - } return false; } +/** + * mei_cl_send_connect - send connect request + * + * @cl: host client + * @cb: callback block + * + * Return: 0, OK; otherwise, error. + */ +static int mei_cl_send_connect(struct mei_cl *cl, struct mei_cl_cb *cb) +{ + struct mei_device *dev; + int ret; + + dev = cl->dev; + + ret = mei_hbm_cl_connect_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_connect - send connect request in irq_thread context + * + * @cl: host client + * @cb: callback block + * @cmpl_list: complete list + * + * Return: 0, OK; otherwise, error. + */ +int mei_cl_irq_connect(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 rets; + + msg_slots = mei_data2slots(sizeof(struct hbm_client_connect_request)); + slots = mei_hbuf_empty_slots(dev); + + if (mei_cl_is_other_connecting(cl)) + return 0; + + if (slots < msg_slots) + return -EMSGSIZE; + + rets = mei_cl_send_connect(cl, cb); + if (rets) + list_move_tail(&cb->list, &cmpl_list->list); + + return rets; +} + /** * mei_cl_connect - connect host client to the me one * * @cl: host client + * @me_cl: me client * @file: pointer to file structure * * Locking: called under "dev->device_lock" lock * * Return: 0 on success, <0 on failure. */ -int mei_cl_connect(struct mei_cl *cl, struct file *file) +int mei_cl_connect(struct mei_cl *cl, struct mei_me_client *me_cl, + struct file *file) { struct mei_device *dev; struct mei_cl_cb *cb; int rets; - if (WARN_ON(!cl || !cl->dev)) + if (WARN_ON(!cl || !cl->dev || !me_cl)) return -ENODEV; dev = cl->dev; + rets = mei_cl_set_connecting(cl, me_cl); + if (rets) + return rets; + + if (mei_cl_is_fixed_address(cl)) { + cl->state = MEI_FILE_CONNECTED; + return 0; + } + rets = pm_runtime_get(dev->dev); if (rets < 0 && rets != -EINPROGRESS) { pm_runtime_put_noidle(dev->dev); cl_err(dev, cl, "rpm: get failed %d\n", rets); - return rets; + goto nortpm; } cb = mei_io_cb_init(cl, MEI_FOP_CONNECT, file); @@ -855,45 +1066,52 @@ int mei_cl_connect(struct mei_cl *cl, struct file *file) if (rets) goto out; + list_add_tail(&cb->list, &dev->ctrl_wr_list.list); + /* run hbuf acquire last so we don't have to undo */ if (!mei_cl_is_other_connecting(cl) && mei_hbuf_acquire(dev)) { - cl->state = MEI_FILE_CONNECTING; - if (mei_hbm_cl_connect_req(dev, cl)) { - rets = -ENODEV; + rets = mei_cl_send_connect(cl, cb); + if (rets) goto out; - } - cl->timer_count = MEI_CONNECT_TIMEOUT; - list_add_tail(&cb->list, &dev->ctrl_rd_list.list); - } else { - cl->state = MEI_FILE_INITIALIZING; - list_add_tail(&cb->list, &dev->ctrl_wr_list.list); } 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_REQUIRED || + 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->state == MEI_FILE_DISCONNECT_REQUIRED) { + mei_io_list_flush(&dev->ctrl_rd_list, cl); + mei_io_list_flush(&dev->ctrl_wr_list, cl); + /* ignore disconnect return valuue; + * in case of failure reset will be invoked + */ + __mei_cl_disconnect(cl); + rets = -EFAULT; + goto out; + } + + /* timeout or 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); } rets = cl->status; - out: cl_dbg(dev, cl, "rpm: autosuspend\n"); pm_runtime_mark_last_busy(dev->dev); pm_runtime_put_autosuspend(dev->dev); mei_io_cb_free(cb); + +nortpm: + if (!mei_cl_is_connected(cl)) + mei_cl_set_disconnected(cl); + return rets; } @@ -934,36 +1152,29 @@ err: * @cl: private data of the file object * * Return: 1 if mei_flow_ctrl_creds >0, 0 - otherwise. - * -ENOENT if mei_cl is not present - * -EINVAL if single_recv_buf == 0 */ int mei_cl_flow_ctrl_creds(struct mei_cl *cl) { - struct mei_device *dev; - struct mei_me_client *me_cl; - int rets = 0; + int rets; - if (WARN_ON(!cl || !cl->dev)) + if (WARN_ON(!cl || !cl->me_cl)) return -EINVAL; - dev = cl->dev; - if (cl->mei_flow_ctrl_creds > 0) return 1; - me_cl = mei_me_cl_by_uuid_id(dev, &cl->cl_uuid, cl->me_client_id); - if (!me_cl) { - cl_err(dev, cl, "no such me client %d\n", cl->me_client_id); - return -ENOENT; + if (mei_cl_is_fixed_address(cl)) { + rets = mei_cl_read_start(cl, mei_cl_mtu(cl), NULL); + if (rets && rets != -EBUSY) + return rets; + return 1; } - if (me_cl->mei_flow_ctrl_creds > 0) { - rets = 1; - if (WARN_ON(me_cl->props.single_recv_buf == 0)) - rets = -EINVAL; + if (mei_cl_is_single_recv_buf(cl)) { + if (cl->me_cl->mei_flow_ctrl_creds > 0) + return 1; } - mei_me_cl_put(me_cl); - return rets; + return 0; } /** @@ -973,45 +1184,243 @@ int mei_cl_flow_ctrl_creds(struct mei_cl *cl) * * Return: * 0 on success - * -ENOENT when me client is not found * -EINVAL when ctrl credits are <= 0 */ int mei_cl_flow_ctrl_reduce(struct mei_cl *cl) +{ + if (WARN_ON(!cl || !cl->me_cl)) + return -EINVAL; + + if (mei_cl_is_fixed_address(cl)) + return 0; + + if (mei_cl_is_single_recv_buf(cl)) { + if (WARN_ON(cl->me_cl->mei_flow_ctrl_creds <= 0)) + return -EINVAL; + cl->me_cl->mei_flow_ctrl_creds--; + } else { + if (WARN_ON(cl->mei_flow_ctrl_creds <= 0)) + return -EINVAL; + cl->mei_flow_ctrl_creds--; + } + return 0; +} + +/** + * mei_cl_notify_fop2req - convert fop to proper request + * + * @fop: client notification start response command + * + * Return: MEI_HBM_NOTIFICATION_START/STOP + */ +u8 mei_cl_notify_fop2req(enum mei_cb_file_ops fop) +{ + if (fop == MEI_FOP_NOTIFY_START) + return MEI_HBM_NOTIFICATION_START; + else + return MEI_HBM_NOTIFICATION_STOP; +} + +/** + * mei_cl_notify_req2fop - convert notification request top file operation type + * + * @req: hbm notification request type + * + * Return: MEI_FOP_NOTIFY_START/STOP + */ +enum mei_cb_file_ops mei_cl_notify_req2fop(u8 req) +{ + if (req == MEI_HBM_NOTIFICATION_START) + return MEI_FOP_NOTIFY_START; + else + return MEI_FOP_NOTIFY_STOP; +} + +/** + * mei_cl_irq_notify - send notification request in irq_thread context + * + * @cl: client + * @cb: callback block. + * @cmpl_list: complete list. + * + * Return: 0 on such and error otherwise. + */ +int mei_cl_irq_notify(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; + bool request; + + msg_slots = mei_data2slots(sizeof(struct hbm_client_connect_request)); + slots = mei_hbuf_empty_slots(dev); + + if (slots < msg_slots) + return -EMSGSIZE; + + request = mei_cl_notify_fop2req(cb->fop_type); + ret = mei_hbm_cl_notify_req(dev, cl, request); + if (ret) { + cl->status = ret; + list_move_tail(&cb->list, &cmpl_list->list); + return ret; + } + + list_move_tail(&cb->list, &dev->ctrl_rd_list.list); + return 0; +} + +/** + * mei_cl_notify_request - send notification stop/start request + * + * @cl: host client + * @file: associate request with file + * @request: 1 for start or 0 for stop + * + * Locking: called under "dev->device_lock" lock + * + * Return: 0 on such and error otherwise. + */ +int mei_cl_notify_request(struct mei_cl *cl, struct file *file, u8 request) { struct mei_device *dev; - struct mei_me_client *me_cl; + struct mei_cl_cb *cb; + enum mei_cb_file_ops fop_type; int rets; if (WARN_ON(!cl || !cl->dev)) - return -EINVAL; + return -ENODEV; dev = cl->dev; - me_cl = mei_me_cl_by_uuid_id(dev, &cl->cl_uuid, cl->me_client_id); - if (!me_cl) { - cl_err(dev, cl, "no such me client %d\n", cl->me_client_id); - return -ENOENT; + if (!dev->hbm_f_ev_supported) { + cl_dbg(dev, cl, "notifications not supported\n"); + return -EOPNOTSUPP; } - if (me_cl->props.single_recv_buf) { - if (WARN_ON(me_cl->mei_flow_ctrl_creds <= 0)) { - rets = -EINVAL; + rets = pm_runtime_get(dev->dev); + if (rets < 0 && rets != -EINPROGRESS) { + pm_runtime_put_noidle(dev->dev); + cl_err(dev, cl, "rpm: get failed %d\n", rets); + return rets; + } + + fop_type = mei_cl_notify_req2fop(request); + cb = mei_io_cb_init(cl, fop_type, file); + if (!cb) { + rets = -ENOMEM; + goto out; + } + + if (mei_hbuf_acquire(dev)) { + if (mei_hbm_cl_notify_req(dev, cl, request)) { + rets = -ENODEV; goto out; } - me_cl->mei_flow_ctrl_creds--; + list_add_tail(&cb->list, &dev->ctrl_rd_list.list); } else { - if (WARN_ON(cl->mei_flow_ctrl_creds <= 0)) { - rets = -EINVAL; - goto out; - } - cl->mei_flow_ctrl_creds--; + list_add_tail(&cb->list, &dev->ctrl_wr_list.list); + } + + mutex_unlock(&dev->device_lock); + wait_event_timeout(cl->wait, cl->notify_en == request, + mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT)); + mutex_lock(&dev->device_lock); + + if (cl->notify_en != request) { + mei_io_list_flush(&dev->ctrl_rd_list, cl); + mei_io_list_flush(&dev->ctrl_wr_list, cl); + if (!cl->status) + cl->status = -EFAULT; } - rets = 0; + + rets = cl->status; + out: - mei_me_cl_put(me_cl); + cl_dbg(dev, cl, "rpm: autosuspend\n"); + pm_runtime_mark_last_busy(dev->dev); + pm_runtime_put_autosuspend(dev->dev); + + mei_io_cb_free(cb); return rets; } +/** + * mei_cl_notify - raise notification + * + * @cl: host client + * + * Locking: called under "dev->device_lock" lock + */ +void mei_cl_notify(struct mei_cl *cl) +{ + struct mei_device *dev; + + if (!cl || !cl->dev) + return; + + dev = cl->dev; + + if (!cl->notify_en) + return; + + cl_dbg(dev, cl, "notify event"); + cl->notify_ev = true; + wake_up_interruptible_all(&cl->ev_wait); + + if (cl->ev_async) + kill_fasync(&cl->ev_async, SIGIO, POLL_PRI); + + mei_cl_bus_notify_event(cl); +} + +/** + * mei_cl_notify_get - get or wait for notification event + * + * @cl: host client + * @block: this request is blocking + * @notify_ev: true if notification event was received + * + * Locking: called under "dev->device_lock" lock + * + * Return: 0 on such and error otherwise. + */ +int mei_cl_notify_get(struct mei_cl *cl, bool block, bool *notify_ev) +{ + struct mei_device *dev; + int rets; + + *notify_ev = false; + + if (WARN_ON(!cl || !cl->dev)) + return -ENODEV; + + dev = cl->dev; + + if (!mei_cl_is_connected(cl)) + return -ENODEV; + + if (cl->notify_ev) + goto out; + + if (!block) + return -EAGAIN; + + mutex_unlock(&dev->device_lock); + rets = wait_event_interruptible(cl->ev_wait, cl->notify_ev); + mutex_lock(&dev->device_lock); + + if (rets < 0) + return rets; + +out: + *notify_ev = cl->notify_ev; + cl->notify_ev = false; + return 0; +} + /** * mei_cl_read_start - the start read client message function. * @@ -1025,7 +1434,6 @@ int mei_cl_read_start(struct mei_cl *cl, size_t length, struct file *fp) { struct mei_device *dev; struct mei_cl_cb *cb; - struct mei_me_client *me_cl; int rets; if (WARN_ON(!cl || !cl->dev)) @@ -1040,27 +1448,29 @@ int mei_cl_read_start(struct mei_cl *cl, size_t length, struct file *fp) if (!list_empty(&cl->rd_pending)) return -EBUSY; - me_cl = mei_me_cl_by_uuid_id(dev, &cl->cl_uuid, cl->me_client_id); - if (!me_cl) { - cl_err(dev, cl, "no such me client %d\n", cl->me_client_id); + if (!mei_me_cl_is_active(cl->me_cl)) { + cl_err(dev, cl, "no such me client\n"); return -ENOTTY; } + /* always allocate at least client max message */ - length = max_t(size_t, length, me_cl->props.max_msg_length); - mei_me_cl_put(me_cl); + length = max_t(size_t, length, mei_cl_mtu(cl)); + cb = mei_cl_alloc_cb(cl, length, MEI_FOP_READ, fp); + if (!cb) + return -ENOMEM; + + if (mei_cl_is_fixed_address(cl)) { + list_add_tail(&cb->list, &cl->rd_pending); + return 0; + } rets = pm_runtime_get(dev->dev); if (rets < 0 && rets != -EINPROGRESS) { pm_runtime_put_noidle(dev->dev); cl_err(dev, cl, "rpm: get failed %d\n", rets); - return rets; + goto nortpm; } - cb = mei_cl_alloc_cb(cl, length, MEI_FOP_READ, fp); - rets = cb ? 0 : -ENOMEM; - if (rets) - goto out; - if (mei_hbuf_acquire(dev)) { rets = mei_hbm_cl_flow_control_req(dev, cl); if (rets < 0) @@ -1068,6 +1478,7 @@ int mei_cl_read_start(struct mei_cl *cl, size_t length, struct file *fp) list_add_tail(&cb->list, &cl->rd_pending); } else { + rets = 0; list_add_tail(&cb->list, &dev->ctrl_wr_list.list); } @@ -1075,7 +1486,7 @@ out: cl_dbg(dev, cl, "rpm: autosuspend\n"); pm_runtime_mark_last_busy(dev->dev); pm_runtime_put_autosuspend(dev->dev); - +nortpm: if (rets) mei_io_cb_free(cb); @@ -1102,6 +1513,7 @@ int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, u32 msg_slots; int slots; int rets; + bool first_chunk; if (WARN_ON(!cl || !cl->dev)) return -ENODEV; @@ -1110,7 +1522,9 @@ int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, buf = &cb->buf; - rets = mei_cl_flow_ctrl_creds(cl); + first_chunk = cb->buf_idx == 0; + + rets = first_chunk ? mei_cl_flow_ctrl_creds(cl) : 1; if (rets < 0) return rets; @@ -1123,8 +1537,8 @@ int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, len = buf->size - cb->buf_idx; msg_slots = mei_data2slots(len); - mei_hdr.host_addr = cl->host_client_id; - mei_hdr.me_addr = cl->me_client_id; + mei_hdr.host_addr = mei_cl_host_addr(cl); + mei_hdr.me_addr = mei_cl_me_id(cl); mei_hdr.reserved = 0; mei_hdr.internal = cb->internal; @@ -1157,12 +1571,14 @@ int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, cb->buf_idx += mei_hdr.length; cb->completed = mei_hdr.msg_complete == 1; - if (mei_hdr.msg_complete) { + if (first_chunk) { if (mei_cl_flow_ctrl_reduce(cl)) return -EIO; - list_move_tail(&cb->list, &dev->write_waiting_list.list); } + if (mei_hdr.msg_complete) + list_move_tail(&cb->list, &dev->write_waiting_list.list); + return 0; } @@ -1181,6 +1597,7 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking) struct mei_device *dev; struct mei_msg_data *buf; struct mei_msg_hdr mei_hdr; + int size; int rets; @@ -1192,10 +1609,10 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking) dev = cl->dev; - buf = &cb->buf; + size = buf->size; - cl_dbg(dev, cl, "size=%d\n", buf->size); + cl_dbg(dev, cl, "size=%d\n", size); rets = pm_runtime_get(dev->dev); if (rets < 0 && rets != -EINPROGRESS) { @@ -1207,8 +1624,8 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking) cb->buf_idx = 0; cl->writing_state = MEI_IDLE; - mei_hdr.host_addr = cl->host_client_id; - mei_hdr.me_addr = cl->me_client_id; + mei_hdr.host_addr = mei_cl_host_addr(cl); + mei_hdr.me_addr = mei_cl_me_id(cl); mei_hdr.reserved = 0; mei_hdr.msg_complete = 0; mei_hdr.internal = cb->internal; @@ -1219,21 +1636,21 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking) if (rets == 0) { cl_dbg(dev, cl, "No flow control credentials: not sending.\n"); - rets = buf->size; + rets = size; goto out; } if (!mei_hbuf_acquire(dev)) { cl_dbg(dev, cl, "Cannot acquire the host buffer: not sending.\n"); - rets = buf->size; + rets = size; goto out; } /* Check for a maximum length */ - if (buf->size > mei_hbuf_max_len(dev)) { + if (size > mei_hbuf_max_len(dev)) { mei_hdr.length = mei_hbuf_max_len(dev); mei_hdr.msg_complete = 0; } else { - mei_hdr.length = buf->size; + mei_hdr.length = size; mei_hdr.msg_complete = 1; } @@ -1241,22 +1658,21 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking) if (rets) goto err; + rets = mei_cl_flow_ctrl_reduce(cl); + if (rets) + goto err; + cl->writing_state = MEI_WRITING; cb->buf_idx = mei_hdr.length; cb->completed = mei_hdr.msg_complete == 1; out: - if (mei_hdr.msg_complete) { - rets = mei_cl_flow_ctrl_reduce(cl); - if (rets < 0) - goto err; - + if (mei_hdr.msg_complete) list_add_tail(&cb->list, &dev->write_waiting_list.list); - } else { + else list_add_tail(&cb->list, &dev->write_list.list); - } - + cb = NULL; if (blocking && cl->writing_state != MEI_WRITE_COMPLETE) { mutex_unlock(&dev->device_lock); @@ -1271,7 +1687,7 @@ out: } } - rets = buf->size; + rets = size; err: cl_dbg(dev, cl, "rpm: autosuspend\n"); pm_runtime_mark_last_busy(dev->dev); @@ -1289,20 +1705,38 @@ err: */ void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb) { - if (cb->fop_type == MEI_FOP_WRITE) { + struct mei_device *dev = cl->dev; + + 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)) + if (waitqueue_active(&cl->tx_wait)) { wake_up_interruptible(&cl->tx_wait); + } else { + pm_runtime_mark_last_busy(dev->dev); + pm_request_autosuspend(dev->dev); + } + 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: + case MEI_FOP_NOTIFY_STOP: + case MEI_FOP_NOTIFY_START: + if (waitqueue_active(&cl->wait)) + wake_up(&cl->wait); + + break; + default: + BUG_ON(0); } } @@ -1312,16 +1746,12 @@ 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); } @@ -1343,6 +1773,12 @@ void mei_cl_all_wakeup(struct mei_device *dev) cl_dbg(dev, cl, "Waking up writing client!\n"); wake_up_interruptible(&cl->tx_wait); } + + /* synchronized under device mutex */ + if (waitqueue_active(&cl->ev_wait)) { + cl_dbg(dev, cl, "Waking up waiting for event clients!\n"); + wake_up_interruptible(&cl->ev_wait); + } } } -- cgit 1.2.3-korg