diff options
Diffstat (limited to 'drivers/misc/mei/client.c')
| -rw-r--r-- | drivers/misc/mei/client.c | 238 |
1 files changed, 142 insertions, 96 deletions
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c index 324e1de93687..bc9ba5359bc6 100644 --- a/drivers/misc/mei/client.c +++ b/drivers/misc/mei/client.c @@ -14,10 +14,10 @@ * */ -#include <linux/pci.h> #include <linux/sched.h> #include <linux/wait.h> #include <linux/delay.h> +#include <linux/slab.h> #include <linux/pm_runtime.h> #include <linux/mei.h> @@ -27,47 +27,90 @@ #include "client.h" /** - * mei_me_cl_by_uuid - locate index of me client + * mei_me_cl_by_uuid - locate me client by uuid * * @dev: mei device + * @uuid: me client uuid * * Locking: called under "dev->device_lock" lock * - * returns me client index or -ENOENT if not found + * Return: me client or NULL if not found */ -int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *uuid) +struct mei_me_client *mei_me_cl_by_uuid(const struct mei_device *dev, + const uuid_le *uuid) { - int i; + struct mei_me_client *me_cl; - for (i = 0; i < dev->me_clients_num; ++i) - if (uuid_le_cmp(*uuid, - dev->me_clients[i].props.protocol_name) == 0) - return i; + list_for_each_entry(me_cl, &dev->me_clients, list) + if (uuid_le_cmp(*uuid, me_cl->props.protocol_name) == 0) + return me_cl; - return -ENOENT; + return NULL; } - /** - * mei_me_cl_by_id return index to me_clients for client_id + * mei_me_cl_by_id - locate me client by client id * * @dev: the device structure * @client_id: me client id * * Locking: called under "dev->device_lock" lock * - * returns index on success, -ENOENT on failure. + * Return: me client or NULL if not found */ +struct mei_me_client *mei_me_cl_by_id(struct mei_device *dev, u8 client_id) +{ + + struct mei_me_client *me_cl; -int mei_me_cl_by_id(struct mei_device *dev, u8 client_id) + list_for_each_entry(me_cl, &dev->me_clients, list) + if (me_cl->client_id == client_id) + return me_cl; + return NULL; +} + +/** + * mei_me_cl_by_uuid_id - locate me client by client id and uuid + * + * @dev: the device structure + * @uuid: me client uuid + * @client_id: me client id + * + * Locking: called under "dev->device_lock" lock + * + * Return: me client or NULL if not found + */ +struct mei_me_client *mei_me_cl_by_uuid_id(struct mei_device *dev, + const uuid_le *uuid, u8 client_id) { - int i; + struct mei_me_client *me_cl; - for (i = 0; i < dev->me_clients_num; i++) - if (dev->me_clients[i].client_id == client_id) - return i; + list_for_each_entry(me_cl, &dev->me_clients, list) + if (uuid_le_cmp(*uuid, me_cl->props.protocol_name) == 0 && + me_cl->client_id == client_id) + return me_cl; + return NULL; +} - return -ENOENT; +/** + * mei_me_cl_remove - remove me client matching uuid and client_id + * + * @dev: the device structure + * @uuid: me client uuid + * @client_id: me client address + */ +void mei_me_cl_remove(struct mei_device *dev, const uuid_le *uuid, u8 client_id) +{ + struct mei_me_client *me_cl, *next; + + list_for_each_entry_safe(me_cl, next, &dev->me_clients, list) { + if (uuid_le_cmp(*uuid, me_cl->props.protocol_name) == 0 && + me_cl->client_id == client_id) { + list_del(&me_cl->list); + kfree(me_cl); + break; + } + } } @@ -77,7 +120,7 @@ int mei_me_cl_by_id(struct mei_device *dev, u8 client_id) * @cl1: host client 1 * @cl2: host client 2 * - * returns true - if the clients has same host and me ids + * Return: true - if the clients has same host and me ids * false - otherwise */ static inline bool mei_cl_cmp_id(const struct mei_cl *cl1, @@ -117,7 +160,7 @@ static void __mei_io_list_flush(struct mei_cl_cb *list, * @list: An instance of our list structure * @cl: host client */ -static inline void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl) +void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl) { __mei_io_list_flush(list, cl, false); } @@ -152,10 +195,10 @@ void mei_io_cb_free(struct mei_cl_cb *cb) /** * mei_io_cb_init - allocate and initialize io callback * - * @cl - mei client + * @cl: mei client * @fp: pointer to file structure * - * returns mei_cl_cb pointer or NULL; + * Return: mei_cl_cb pointer or NULL; */ struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl, struct file *fp) { @@ -179,7 +222,7 @@ struct mei_cl_cb *mei_io_cb_init(struct mei_cl *cl, struct file *fp) * @cb: io callback structure * @length: size of the buffer * - * returns 0 on success + * Return: 0 on success * -EINVAL if cb is NULL * -ENOMEM if allocation failed */ @@ -203,7 +246,7 @@ int mei_io_cb_alloc_req_buf(struct mei_cl_cb *cb, size_t length) * @cb: io callback structure * @length: size of the buffer * - * returns 0 on success + * Return: 0 on success * -EINVAL if cb is NULL * -ENOMEM if allocation failed */ @@ -228,6 +271,8 @@ int mei_io_cb_alloc_resp_buf(struct mei_cl_cb *cb, size_t length) * mei_cl_flush_queues - flushes queue lists belonging to cl. * * @cl: host client + * + * Return: 0 on success, -EINVAL if cl or cl->dev is NULL. */ int mei_cl_flush_queues(struct mei_cl *cl) { @@ -273,7 +318,7 @@ void mei_cl_init(struct mei_cl *cl, struct mei_device *dev) * mei_cl_allocate - allocates cl structure and sets it up. * * @dev: mei device - * returns The allocated file or NULL on failure + * Return: The allocated file or NULL on failure */ struct mei_cl *mei_cl_allocate(struct mei_device *dev) { @@ -293,7 +338,7 @@ struct mei_cl *mei_cl_allocate(struct mei_device *dev) * * @cl: host client * - * returns cb on success, NULL on error + * Return: cb on success, NULL on error */ struct mei_cl_cb *mei_cl_find_read_cb(struct mei_cl *cl) { @@ -311,7 +356,7 @@ struct mei_cl_cb *mei_cl_find_read_cb(struct mei_cl *cl) * @cl - host client * @id - fixed host id or -1 for generic one * - * returns 0 on success + * Return: 0 on success * -EINVAL on incorrect values * -ENONET if client not found */ @@ -331,13 +376,13 @@ int mei_cl_link(struct mei_cl *cl, int id) MEI_CLIENTS_MAX); if (id >= MEI_CLIENTS_MAX) { - dev_err(&dev->pdev->dev, "id exceeded %d", MEI_CLIENTS_MAX); + dev_err(dev->dev, "id exceeded %d", MEI_CLIENTS_MAX); return -EMFILE; } open_handle_count = dev->open_handle_count + dev->iamthif_open_count; if (open_handle_count >= MEI_MAX_OPEN_HANDLE_COUNT) { - dev_err(&dev->pdev->dev, "open_handle_count exceeded %d", + dev_err(dev->dev, "open_handle_count exceeded %d", MEI_MAX_OPEN_HANDLE_COUNT); return -EMFILE; } @@ -359,6 +404,8 @@ int mei_cl_link(struct mei_cl *cl, int id) * mei_cl_unlink - remove me_cl from the list * * @cl: host client + * + * Return: always 0 */ int mei_cl_unlink(struct mei_cl *cl) { @@ -395,19 +442,19 @@ void mei_host_client_init(struct work_struct *work) { struct mei_device *dev = container_of(work, struct mei_device, init_work); - struct mei_client_properties *client_props; - int i; + struct mei_me_client *me_cl; + struct mei_client_properties *props; mutex_lock(&dev->device_lock); - for (i = 0; i < dev->me_clients_num; i++) { - client_props = &dev->me_clients[i].props; + list_for_each_entry(me_cl, &dev->me_clients, list) { + props = &me_cl->props; - if (!uuid_le_cmp(client_props->protocol_name, mei_amthif_guid)) + if (!uuid_le_cmp(props->protocol_name, mei_amthif_guid)) mei_amthif_host_init(dev); - else if (!uuid_le_cmp(client_props->protocol_name, mei_wd_guid)) + else if (!uuid_le_cmp(props->protocol_name, mei_wd_guid)) mei_wd_host_init(dev); - else if (!uuid_le_cmp(client_props->protocol_name, mei_nfc_guid)) + else if (!uuid_le_cmp(props->protocol_name, mei_nfc_guid)) mei_nfc_host_init(dev); } @@ -417,27 +464,27 @@ void mei_host_client_init(struct work_struct *work) mutex_unlock(&dev->device_lock); - pm_runtime_mark_last_busy(&dev->pdev->dev); - dev_dbg(&dev->pdev->dev, "rpm: autosuspend\n"); - pm_runtime_autosuspend(&dev->pdev->dev); + pm_runtime_mark_last_busy(dev->dev); + dev_dbg(dev->dev, "rpm: autosuspend\n"); + pm_runtime_autosuspend(dev->dev); } /** - * mei_hbuf_acquire: try to acquire host buffer + * mei_hbuf_acquire - try to acquire host buffer * * @dev: the device structure - * returns true if host buffer was acquired + * Return: true if host buffer was acquired */ bool mei_hbuf_acquire(struct mei_device *dev) { if (mei_pg_state(dev) == MEI_PG_ON || dev->pg_event == MEI_PG_EVENT_WAIT) { - dev_dbg(&dev->pdev->dev, "device is in pg\n"); + dev_dbg(dev->dev, "device is in pg\n"); return false; } if (!dev->hbuf_is_ready) { - dev_dbg(&dev->pdev->dev, "hbuf is not ready\n"); + dev_dbg(dev->dev, "hbuf is not ready\n"); return false; } @@ -453,7 +500,7 @@ bool mei_hbuf_acquire(struct mei_device *dev) * * Locking: called under "dev->device_lock" lock * - * returns 0 on success, <0 on failure. + * Return: 0 on success, <0 on failure. */ int mei_cl_disconnect(struct mei_cl *cl) { @@ -471,9 +518,9 @@ int mei_cl_disconnect(struct mei_cl *cl) if (cl->state != MEI_FILE_DISCONNECTING) return 0; - rets = pm_runtime_get(&dev->pdev->dev); + rets = pm_runtime_get(dev->dev); if (rets < 0 && rets != -EINPROGRESS) { - pm_runtime_put_noidle(&dev->pdev->dev); + pm_runtime_put_noidle(dev->dev); cl_err(dev, cl, "rpm: get failed %d\n", rets); return rets; } @@ -484,7 +531,8 @@ int mei_cl_disconnect(struct mei_cl *cl) goto free; } - cb->fop_type = MEI_FOP_CLOSE; + cb->fop_type = MEI_FOP_DISCONNECT; + if (mei_hbuf_acquire(dev)) { if (mei_hbm_cl_disconnect_req(dev, cl)) { rets = -ENODEV; @@ -501,7 +549,7 @@ int mei_cl_disconnect(struct mei_cl *cl) } mutex_unlock(&dev->device_lock); - wait_event_timeout(dev->wait_recvd_msg, + wait_event_timeout(cl->wait, MEI_FILE_DISCONNECTED == cl->state, mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT)); @@ -519,8 +567,8 @@ int mei_cl_disconnect(struct mei_cl *cl) mei_io_list_flush(&dev->ctrl_wr_list, cl); free: cl_dbg(dev, cl, "rpm: autosuspend\n"); - pm_runtime_mark_last_busy(&dev->pdev->dev); - pm_runtime_put_autosuspend(&dev->pdev->dev); + pm_runtime_mark_last_busy(dev->dev); + pm_runtime_put_autosuspend(dev->dev); mei_io_cb_free(cb); return rets; @@ -533,7 +581,7 @@ free: * * @cl: private data of the file object * - * returns true if other client is connected, false - otherwise. + * Return: true if other client is connected, false - otherwise. */ bool mei_cl_is_other_connecting(struct mei_cl *cl) { @@ -560,10 +608,11 @@ bool mei_cl_is_other_connecting(struct mei_cl *cl) * mei_cl_connect - connect host client to the me one * * @cl: host client + * @file: pointer to file structure * * Locking: called under "dev->device_lock" lock * - * returns 0 on success, <0 on failure. + * Return: 0 on success, <0 on failure. */ int mei_cl_connect(struct mei_cl *cl, struct file *file) { @@ -576,9 +625,9 @@ int mei_cl_connect(struct mei_cl *cl, struct file *file) dev = cl->dev; - rets = pm_runtime_get(&dev->pdev->dev); + rets = pm_runtime_get(dev->dev); if (rets < 0 && rets != -EINPROGRESS) { - pm_runtime_put_noidle(&dev->pdev->dev); + pm_runtime_put_noidle(dev->dev); cl_err(dev, cl, "rpm: get failed %d\n", rets); return rets; } @@ -601,11 +650,12 @@ int mei_cl_connect(struct mei_cl *cl, struct file *file) 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(dev->wait_recvd_msg, + wait_event_timeout(cl->wait, (cl->state == MEI_FILE_CONNECTED || cl->state == MEI_FILE_DISCONNECTED), mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT)); @@ -625,8 +675,8 @@ int mei_cl_connect(struct mei_cl *cl, struct file *file) out: cl_dbg(dev, cl, "rpm: autosuspend\n"); - pm_runtime_mark_last_busy(&dev->pdev->dev); - pm_runtime_put_autosuspend(&dev->pdev->dev); + pm_runtime_mark_last_busy(dev->dev); + pm_runtime_put_autosuspend(dev->dev); mei_io_cb_free(cb); return rets; @@ -637,7 +687,7 @@ out: * * @cl: private data of the file object * - * returns 1 if mei_flow_ctrl_creds >0, 0 - otherwise. + * Return: 1 if mei_flow_ctrl_creds >0, 0 - otherwise. * -ENOENT if mei_cl is not present * -EINVAL if single_recv_buf == 0 */ @@ -645,26 +695,21 @@ int mei_cl_flow_ctrl_creds(struct mei_cl *cl) { struct mei_device *dev; struct mei_me_client *me_cl; - int id; if (WARN_ON(!cl || !cl->dev)) return -EINVAL; dev = cl->dev; - if (!dev->me_clients_num) - return 0; - if (cl->mei_flow_ctrl_creds > 0) return 1; - id = mei_me_cl_by_id(dev, cl->me_client_id); - if (id < 0) { + me_cl = mei_me_cl_by_id(dev, cl->me_client_id); + if (!me_cl) { cl_err(dev, cl, "no such me client %d\n", cl->me_client_id); - return id; + return -ENOENT; } - me_cl = &dev->me_clients[id]; if (me_cl->mei_flow_ctrl_creds) { if (WARN_ON(me_cl->props.single_recv_buf == 0)) return -EINVAL; @@ -678,7 +723,7 @@ int mei_cl_flow_ctrl_creds(struct mei_cl *cl) * * @cl: private data of the file object * - * @returns + * Return: * 0 on success * -ENOENT when me client is not found * -EINVAL when ctrl credits are <= 0 @@ -687,21 +732,19 @@ int mei_cl_flow_ctrl_reduce(struct mei_cl *cl) { struct mei_device *dev; struct mei_me_client *me_cl; - int id; if (WARN_ON(!cl || !cl->dev)) return -EINVAL; dev = cl->dev; - id = mei_me_cl_by_id(dev, cl->me_client_id); - if (id < 0) { + me_cl = mei_me_cl_by_id(dev, cl->me_client_id); + if (!me_cl) { cl_err(dev, cl, "no such me client %d\n", cl->me_client_id); - return id; + return -ENOENT; } - me_cl = &dev->me_clients[id]; - if (me_cl->props.single_recv_buf != 0) { + if (me_cl->props.single_recv_buf) { if (WARN_ON(me_cl->mei_flow_ctrl_creds <= 0)) return -EINVAL; me_cl->mei_flow_ctrl_creds--; @@ -717,15 +760,16 @@ int mei_cl_flow_ctrl_reduce(struct mei_cl *cl) * mei_cl_read_start - the start read client message function. * * @cl: host client + * @length: number of bytes to read * - * returns 0 on success, <0 on failure. + * Return: 0 on success, <0 on failure. */ int mei_cl_read_start(struct mei_cl *cl, size_t length) { struct mei_device *dev; struct mei_cl_cb *cb; + struct mei_me_client *me_cl; int rets; - int i; if (WARN_ON(!cl || !cl->dev)) return -ENODEV; @@ -739,15 +783,15 @@ int mei_cl_read_start(struct mei_cl *cl, size_t length) cl_dbg(dev, cl, "read is pending.\n"); return -EBUSY; } - i = mei_me_cl_by_id(dev, cl->me_client_id); - if (i < 0) { + 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 -ENOTTY; } - rets = pm_runtime_get(&dev->pdev->dev); + rets = pm_runtime_get(dev->dev); if (rets < 0 && rets != -EINPROGRESS) { - pm_runtime_put_noidle(&dev->pdev->dev); + pm_runtime_put_noidle(dev->dev); cl_err(dev, cl, "rpm: get failed %d\n", rets); return rets; } @@ -759,7 +803,7 @@ int mei_cl_read_start(struct mei_cl *cl, size_t length) } /* always allocate at least client max message */ - length = max_t(size_t, length, dev->me_clients[i].props.max_msg_length); + length = max_t(size_t, length, me_cl->props.max_msg_length); rets = mei_io_cb_alloc_resp_buf(cb, length); if (rets) goto out; @@ -779,8 +823,8 @@ int mei_cl_read_start(struct mei_cl *cl, size_t length) out: cl_dbg(dev, cl, "rpm: autosuspend\n"); - pm_runtime_mark_last_busy(&dev->pdev->dev); - pm_runtime_put_autosuspend(&dev->pdev->dev); + pm_runtime_mark_last_busy(dev->dev); + pm_runtime_put_autosuspend(dev->dev); if (rets) mei_io_cb_free(cb); @@ -796,7 +840,7 @@ out: * @cb: callback block. * @cmpl_list: complete list. * - * returns 0, OK; otherwise error. + * Return: 0, OK; otherwise error. */ int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, struct mei_cl_cb *cmpl_list) @@ -873,12 +917,13 @@ int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, /** * mei_cl_write - submit a write cb to mei device - assumes device_lock is locked + * assumes device_lock is locked * * @cl: host client - * @cl: write callback with filled data + * @cb: write callback with filled data + * @blocking: block until completed * - * returns number of bytes sent on success, <0 on failure. + * Return: number of bytes sent on success, <0 on failure. */ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking) { @@ -899,11 +944,11 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking) buf = &cb->request_buffer; - cl_dbg(dev, cl, "mei_cl_write %d\n", buf->size); + cl_dbg(dev, cl, "size=%d\n", buf->size); - rets = pm_runtime_get(&dev->pdev->dev); + rets = pm_runtime_get(dev->dev); if (rets < 0 && rets != -EINPROGRESS) { - pm_runtime_put_noidle(&dev->pdev->dev); + pm_runtime_put_noidle(dev->dev); cl_err(dev, cl, "rpm: get failed %d\n", rets); return rets; } @@ -978,8 +1023,8 @@ out: rets = buf->size; err: cl_dbg(dev, cl, "rpm: autosuspend\n"); - pm_runtime_mark_last_busy(&dev->pdev->dev); - pm_runtime_put_autosuspend(&dev->pdev->dev); + pm_runtime_mark_last_busy(dev->dev); + pm_runtime_put_autosuspend(dev->dev); return rets; } @@ -1015,7 +1060,7 @@ void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb) /** * mei_cl_all_disconnect - disconnect forcefully all connected clients * - * @dev - mei device + * @dev: mei device */ void mei_cl_all_disconnect(struct mei_device *dev) @@ -1033,11 +1078,12 @@ void mei_cl_all_disconnect(struct mei_device *dev) /** * mei_cl_all_wakeup - wake up all readers and writers they can be interrupted * - * @dev - mei device + * @dev: mei device */ void mei_cl_all_wakeup(struct mei_device *dev) { struct mei_cl *cl; + list_for_each_entry(cl, &dev->file_list, link) { if (waitqueue_active(&cl->rx_wait)) { cl_dbg(dev, cl, "Waking up reading client!\n"); @@ -1052,8 +1098,8 @@ void mei_cl_all_wakeup(struct mei_device *dev) /** * mei_cl_all_write_clear - clear all pending writes - - * @dev - mei device + * + * @dev: mei device */ void mei_cl_all_write_clear(struct mei_device *dev) { |