diff options
| -rw-r--r-- | drivers/misc/mei/amthif.c | 19 | ||||
| -rw-r--r-- | drivers/misc/mei/bus.c | 38 | ||||
| -rw-r--r-- | drivers/misc/mei/client.c | 118 | ||||
| -rw-r--r-- | drivers/misc/mei/client.h | 96 | ||||
| -rw-r--r-- | drivers/misc/mei/debugfs.c | 2 | ||||
| -rw-r--r-- | drivers/misc/mei/hbm.c | 4 | ||||
| -rw-r--r-- | drivers/misc/mei/interrupt.c | 4 | ||||
| -rw-r--r-- | drivers/misc/mei/main.c | 31 | ||||
| -rw-r--r-- | drivers/misc/mei/mei_dev.h | 20 | ||||
| -rw-r--r-- | drivers/misc/mei/nfc.c | 50 | ||||
| -rw-r--r-- | drivers/misc/mei/wd.c | 22 |
11 files changed, 225 insertions, 179 deletions
diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c index d2cd53e..3c69616 100644 --- a/drivers/misc/mei/amthif.c +++ b/drivers/misc/mei/amthif.c @@ -59,28 +59,19 @@ void mei_amthif_reset_params(struct mei_device *dev) * mei_amthif_host_init - mei initialization amthif client. * * @dev: the device structure + * @me_cl: me client * * Return: 0 on success, <0 on failure. */ -int mei_amthif_host_init(struct mei_device *dev) +int mei_amthif_host_init(struct mei_device *dev, struct mei_me_client *me_cl) { struct mei_cl *cl = &dev->iamthif_cl; - struct mei_me_client *me_cl; int ret; dev->iamthif_state = MEI_IAMTHIF_IDLE; mei_cl_init(cl, dev); - me_cl = mei_me_cl_by_uuid(dev, &mei_amthif_guid); - if (!me_cl) { - dev_info(dev->dev, "amthif: failed to find the client"); - return -ENOTTY; - } - - cl->me_client_id = me_cl->client_id; - cl->cl_uuid = me_cl->props.protocol_name; - /* Assign iamthif_mtu to the value received from ME */ dev->iamthif_mtu = me_cl->props.max_msg_length; @@ -90,15 +81,13 @@ int mei_amthif_host_init(struct mei_device *dev) ret = mei_cl_link(cl, MEI_IAMTHIF_HOST_CLIENT_ID); if (ret < 0) { dev_err(dev->dev, "amthif: failed cl_link %d\n", ret); - goto out; + return ret; } - ret = mei_cl_connect(cl, NULL); + ret = mei_cl_connect(cl, me_cl, NULL); dev->iamthif_state = MEI_IAMTHIF_IDLE; -out: - mei_me_cl_put(me_cl); return ret; } diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 00b0cb2..1101d6e 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -133,7 +133,13 @@ static struct bus_type mei_cl_bus_type = { static void mei_cl_dev_release(struct device *dev) { - kfree(to_mei_cl_device(dev)); + struct mei_cl_device *device = to_mei_cl_device(dev); + + if (!device) + return; + + mei_me_cl_put(device->me_cl); + kfree(device); } static struct device_type mei_cl_device_type = { @@ -141,33 +147,37 @@ static struct device_type mei_cl_device_type = { }; struct mei_cl *mei_cl_bus_find_cl_by_uuid(struct mei_device *dev, - uuid_le uuid) + uuid_le uuid) { struct mei_cl *cl; list_for_each_entry(cl, &dev->device_list, device_link) { - if (!uuid_le_cmp(uuid, cl->cl_uuid)) + if (cl->device && cl->device->me_cl && + !uuid_le_cmp(uuid, *mei_me_cl_uuid(cl->device->me_cl))) return cl; } return NULL; } + struct mei_cl_device *mei_cl_add_device(struct mei_device *dev, - uuid_le uuid, char *name, + struct mei_me_client *me_cl, + struct mei_cl *cl, + char *name, struct mei_cl_ops *ops) { struct mei_cl_device *device; - struct mei_cl *cl; int status; - cl = mei_cl_bus_find_cl_by_uuid(dev, uuid); - if (cl == NULL) - return NULL; - device = kzalloc(sizeof(struct mei_cl_device), GFP_KERNEL); if (!device) return NULL; + device->me_cl = mei_me_cl_get(me_cl); + if (!device->me_cl) { + kfree(device); + return NULL; + } device->cl = cl; device->ops = ops; @@ -180,6 +190,7 @@ struct mei_cl_device *mei_cl_add_device(struct mei_device *dev, status = device_register(&device->dev); if (status) { dev_err(dev->dev, "Failed to register MEI device\n"); + mei_me_cl_put(device->me_cl); kfree(device); return NULL; } @@ -228,7 +239,6 @@ static ssize_t ___mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length, bool blocking) { struct mei_device *dev; - struct mei_me_client *me_cl = NULL; struct mei_cl_cb *cb = NULL; ssize_t rets; @@ -244,13 +254,12 @@ static ssize_t ___mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length, } /* Check if we have an ME client device */ - me_cl = mei_me_cl_by_uuid_id(dev, &cl->cl_uuid, cl->me_client_id); - if (!me_cl) { + if (!mei_me_cl_is_active(cl->me_cl)) { rets = -ENOTTY; goto out; } - if (length > me_cl->props.max_msg_length) { + if (length > mei_cl_mtu(cl)) { rets = -EFBIG; goto out; } @@ -266,7 +275,6 @@ static ssize_t ___mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length, rets = mei_cl_write(cl, cb, blocking); out: - mei_me_cl_put(me_cl); mutex_unlock(&dev->device_lock); if (rets < 0) mei_io_cb_free(cb); @@ -442,7 +450,7 @@ int mei_cl_enable_device(struct mei_cl_device *device) return -EBUSY; } - err = mei_cl_connect(cl, NULL); + err = mei_cl_connect(cl, device->me_cl, NULL); if (err < 0) { mutex_unlock(&dev->device_lock); dev_err(dev->dev, "Could not connect to the ME client"); diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c index 3f8bb90..aa1d35a 100644 --- a/drivers/misc/mei/client.c +++ b/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 @@ -96,11 +96,25 @@ 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 * * @dev: mei device @@ -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)); } /** @@ -620,7 +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 * @@ -668,17 +682,17 @@ 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_nfc_host_init(dev, me_cl); mei_me_cl_put(me_cl); @@ -734,6 +748,9 @@ void mei_cl_set_disconnected(struct mei_cl *cl) mei_io_list_flush(&dev->ctrl_wr_list, cl); cl->mei_flow_ctrl_creds = 0; cl->timer_count = 0; + + mei_me_cl_put(cl->me_cl); + cl->me_cl = NULL; } /* @@ -890,7 +907,7 @@ static bool mei_cl_is_other_connecting(struct mei_cl *cl) list_for_each_entry(cb, &dev->ctrl_rd_list.list, list) { if (cb->fop_type == MEI_FOP_CONNECT && - cl->me_client_id == cb->cl->me_client_id) + mei_cl_me_id(cl) == mei_cl_me_id(cb->cl)) return true; } @@ -961,13 +978,15 @@ int mei_cl_irq_connect(struct mei_cl *cl, struct mei_cl_cb *cb, * 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; @@ -990,6 +1009,12 @@ int mei_cl_connect(struct mei_cl *cl, struct file *file) if (rets) goto out; + cl->me_cl = mei_me_cl_get(me_cl); + if (!cl->me_cl) { + rets = -ENODEV; + goto out; + } + cl->state = MEI_FILE_CONNECTING; list_add_tail(&cb->list, &dev->ctrl_wr_list.list); @@ -1064,36 +1089,20 @@ 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; - - 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_single_recv_buf(cl)) { + if (cl->me_cl->mei_flow_ctrl_creds > 0) + return 1; } - - if (me_cl->mei_flow_ctrl_creds > 0) { - rets = 1; - if (WARN_ON(me_cl->props.single_recv_buf == 0)) - rets = -EINVAL; - } - mei_me_cl_put(me_cl); - return rets; + return 0; } /** @@ -1103,43 +1112,23 @@ 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) { - struct mei_device *dev; - struct mei_me_client *me_cl; - int rets; - - if (WARN_ON(!cl || !cl->dev)) + if (WARN_ON(!cl || !cl->me_cl)) return -EINVAL; - 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 (me_cl->props.single_recv_buf) { - if (WARN_ON(me_cl->mei_flow_ctrl_creds <= 0)) { - rets = -EINVAL; - goto out; - } - me_cl->mei_flow_ctrl_creds--; + 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)) { - rets = -EINVAL; - goto out; - } + if (WARN_ON(cl->mei_flow_ctrl_creds <= 0)) + return -EINVAL; cl->mei_flow_ctrl_creds--; } - rets = 0; -out: - mei_me_cl_put(me_cl); - return rets; + return 0; } /** @@ -1155,7 +1144,6 @@ 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)) @@ -1170,14 +1158,12 @@ 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)); rets = pm_runtime_get(dev->dev); if (rets < 0 && rets != -EINPROGRESS) { @@ -1254,7 +1240,7 @@ int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, msg_slots = mei_data2slots(len); mei_hdr.host_addr = cl->host_client_id; - mei_hdr.me_addr = cl->me_client_id; + mei_hdr.me_addr = mei_cl_me_id(cl); mei_hdr.reserved = 0; mei_hdr.internal = cb->internal; @@ -1338,7 +1324,7 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking) cl->writing_state = MEI_IDLE; mei_hdr.host_addr = cl->host_client_id; - mei_hdr.me_addr = cl->me_client_id; + mei_hdr.me_addr = mei_cl_me_id(cl); mei_hdr.reserved = 0; mei_hdr.msg_complete = 0; mei_hdr.internal = cb->internal; diff --git a/drivers/misc/mei/client.h b/drivers/misc/mei/client.h index 181aed9..0762650 100644 --- a/drivers/misc/mei/client.h +++ b/drivers/misc/mei/client.h @@ -44,6 +44,30 @@ void mei_me_cl_rm_by_uuid_id(struct mei_device *dev, const uuid_le *uuid, u8 id); void mei_me_cl_rm_all(struct mei_device *dev); +/** + * mei_me_cl_is_active - check whether me client is active in the fw + * + * @me_cl: me client + * + * Return: true if the me client is active in the firmware + */ +static inline bool mei_me_cl_is_active(const struct mei_me_client *me_cl) +{ + return !list_empty_careful(&me_cl->list); +} + +/** + * mei_me_cl_uuid - return me client protocol name (uuid) + * + * @me_cl: me client + * + * Return: me client protocol name + */ +static inline const uuid_le *mei_me_cl_uuid(const struct mei_me_client *me_cl) +{ + return &me_cl->props.protocol_name; +} + /* * MEI IO Functions */ @@ -94,20 +118,82 @@ int mei_cl_flow_ctrl_reduce(struct mei_cl *cl); /** * mei_cl_is_connected - host client is connected * - * @cl: host clinet + * @cl: host client * - * Return: true if the host clinet is connected + * Return: true if the host client is connected */ static inline bool mei_cl_is_connected(struct mei_cl *cl) { return cl->state == MEI_FILE_CONNECTED; } +/** + * mei_cl_me_id - me client id + * + * @cl: host client + * + * Return: me client id or 0 if client is not connected + */ +static inline u8 mei_cl_me_id(const struct mei_cl *cl) +{ + return cl->me_cl ? cl->me_cl->client_id : 0; +} + +/** + * mei_cl_mtu - maximal message that client can send and receive + * + * @cl: host client + * + * Return: mtu + */ +static inline size_t mei_cl_mtu(const struct mei_cl *cl) +{ + return cl->me_cl->props.max_msg_length; +} + +/** + * mei_cl_is_fixed_address - check whether the me client uses fixed address + * + * @cl: host client + * + * Return: true if the client is connected and it has fixed me address + */ +static inline bool mei_cl_is_fixed_address(const struct mei_cl *cl) +{ + return cl->me_cl && cl->me_cl->props.fixed_address; +} + +/** + * mei_cl_is_single_recv_buf- check whether the me client + * uses single receiving buffer + * + * @cl: host client + * + * Return: true if single_recv_buf == 1; 0 otherwise + */ +static inline bool mei_cl_is_single_recv_buf(const struct mei_cl *cl) +{ + return cl->me_cl->props.single_recv_buf; +} + +/** + * mei_cl_uuid - client's uuid + * + * @cl: host client + * + * Return: return uuid of connected me client + */ +static inline const uuid_le *mei_cl_uuid(const struct mei_cl *cl) +{ + return mei_me_cl_uuid(cl->me_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_connect(struct mei_cl *cl, struct mei_me_client *me_cl, + struct file *file); int mei_cl_irq_connect(struct mei_cl *cl, struct mei_cl_cb *cb, struct mei_cl_cb *cmpl_list); int mei_cl_read_start(struct mei_cl *cl, size_t length, struct file *fp); @@ -121,14 +207,12 @@ void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb); void mei_host_client_init(struct work_struct *work); - - void mei_cl_all_disconnect(struct mei_device *dev); void mei_cl_all_wakeup(struct mei_device *dev); void mei_cl_all_write_clear(struct mei_device *dev); #define MEI_CL_FMT "cl:host=%02d me=%02d " -#define MEI_CL_PRM(cl) (cl)->host_client_id, (cl)->me_client_id +#define MEI_CL_PRM(cl) (cl)->host_client_id, mei_cl_me_id(cl) #define cl_dbg(dev, cl, format, arg...) \ dev_dbg((dev)->dev, MEI_CL_FMT format, MEI_CL_PRM(cl), ##arg) diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c index d9cd7e6e..3f6d855 100644 --- a/drivers/misc/mei/debugfs.c +++ b/drivers/misc/mei/debugfs.c @@ -116,7 +116,7 @@ static ssize_t mei_dbgfs_read_active(struct file *fp, char __user *ubuf, pos += scnprintf(buf + pos, bufsz - pos, "%2d|%2d|%4d|%5d|%2d|%2d|\n", - i, cl->me_client_id, cl->host_client_id, cl->state, + i, mei_cl_me_id(cl), cl->host_client_id, cl->state, !list_empty(&cl->rd_completed), cl->writing_state); i++; } diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c index 410e029..f620824 100644 --- a/drivers/misc/mei/hbm.c +++ b/drivers/misc/mei/hbm.c @@ -151,7 +151,7 @@ void mei_hbm_cl_hdr(struct mei_cl *cl, u8 hbm_cmd, void *buf, size_t len) cmd->hbm_cmd = hbm_cmd; cmd->host_addr = cl->host_client_id; - cmd->me_addr = cl->me_client_id; + cmd->me_addr = mei_cl_me_id(cl); } /** @@ -189,7 +189,7 @@ static inline bool mei_hbm_cl_addr_equal(struct mei_cl *cl, struct mei_hbm_cl_cmd *cmd) { return cl->host_client_id == cmd->host_addr && - cl->me_client_id == cmd->me_addr; + mei_cl_me_id(cl) == cmd->me_addr; } /** diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index 3b74e3b..7479567 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -66,7 +66,7 @@ static inline int mei_cl_hbm_equal(struct mei_cl *cl, struct mei_msg_hdr *mei_hdr) { return cl->host_client_id == mei_hdr->host_addr && - cl->me_client_id == mei_hdr->me_addr; + mei_cl_me_id(cl) == mei_hdr->me_addr; } /** @@ -182,6 +182,8 @@ static int mei_cl_irq_disconnect_rsp(struct mei_cl *cl, struct mei_cl_cb *cb, ret = mei_hbm_cl_disconnect_rsp(dev, cl); mei_cl_set_disconnected(cl); mei_io_cb_free(cb); + mei_me_cl_put(cl->me_cl); + cl->me_cl = NULL; return ret; } diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index 3d205d1..a696365 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -271,7 +271,6 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf, size_t length, loff_t *offset) { struct mei_cl *cl = file->private_data; - struct mei_me_client *me_cl = NULL; struct mei_cl_cb *write_cb = NULL; struct mei_device *dev; unsigned long timeout = 0; @@ -289,27 +288,27 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf, goto out; } - me_cl = mei_me_cl_by_uuid_id(dev, &cl->cl_uuid, cl->me_client_id); - if (!me_cl) { - rets = -ENOTTY; + if (!mei_cl_is_connected(cl)) { + cl_err(dev, cl, "is not connected"); + rets = -ENODEV; goto out; } - if (length == 0) { - rets = 0; + if (!mei_me_cl_is_active(cl->me_cl)) { + rets = -ENOTTY; goto out; } - if (length > me_cl->props.max_msg_length) { + if (length > mei_cl_mtu(cl)) { rets = -EFBIG; goto out; } - if (!mei_cl_is_connected(cl)) { - cl_err(dev, cl, "is not connected"); - rets = -ENODEV; + if (length == 0) { + rets = 0; goto out; } + if (cl == &dev->iamthif_cl) { write_cb = mei_amthif_find_read_list_entry(dev, file); @@ -347,14 +346,12 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf, "amthif write failed with status = %d\n", rets); goto out; } - mei_me_cl_put(me_cl); mutex_unlock(&dev->device_lock); return length; } rets = mei_cl_write(cl, write_cb, false); out: - mei_me_cl_put(me_cl); mutex_unlock(&dev->device_lock); if (rets < 0) mei_io_cb_free(write_cb); @@ -394,15 +391,13 @@ static int mei_ioctl_connect_client(struct file *file, me_cl = mei_me_cl_by_uuid(dev, &data->in_client_uuid); if (!me_cl || me_cl->props.fixed_address) { dev_dbg(dev->dev, "Cannot connect to FW Client UUID = %pUl\n", - &data->in_client_uuid); + &data->in_client_uuid); + mei_me_cl_put(me_cl); return -ENOTTY; } - cl->me_client_id = me_cl->client_id; - cl->cl_uuid = me_cl->props.protocol_name; - dev_dbg(dev->dev, "Connect to FW Client ID = %d\n", - cl->me_client_id); + me_cl->client_id); dev_dbg(dev->dev, "FW Client - Protocol Version = %d\n", me_cl->props.protocol_version); dev_dbg(dev->dev, "FW Client - Max Msg Len = %d\n", @@ -438,7 +433,7 @@ static int mei_ioctl_connect_client(struct file *file, client->protocol_version = me_cl->props.protocol_version; dev_dbg(dev->dev, "Can connect?\n"); - rets = mei_cl_connect(cl, file); + rets = mei_cl_connect(cl, me_cl, file); end: mei_me_cl_put(me_cl); diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index 7b039f8..87db097 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -227,11 +227,11 @@ struct mei_cl_cb { * @rx_wait: wait queue for rx completion * @wait: wait queue for management operation * @status: connection status - * @cl_uuid: client uuid name + * @me_cl: fw client connected * @host_client_id: host id - * @me_client_id: me/fw id * @mei_flow_ctrl_creds: transmit flow credentials * @timer_count: watchdog timer for operation completion + * @reserved: reserved for alignment * @writing_state: state of the tx * @rd_pending: pending read credits * @rd_completed: completed read @@ -247,11 +247,11 @@ struct mei_cl { wait_queue_head_t rx_wait; wait_queue_head_t wait; int status; - uuid_le cl_uuid; + struct mei_me_client *me_cl; u8 host_client_id; - u8 me_client_id; u8 mei_flow_ctrl_creds; u8 timer_count; + u8 reserved; enum mei_file_transaction_states writing_state; struct list_head rd_pending; struct list_head rd_completed; @@ -346,7 +346,9 @@ struct mei_cl_ops { }; struct mei_cl_device *mei_cl_add_device(struct mei_device *dev, - uuid_le uuid, char *name, + struct mei_me_client *me_cl, + struct mei_cl *cl, + char *name, struct mei_cl_ops *ops); void mei_cl_remove_device(struct mei_cl_device *device); @@ -368,6 +370,7 @@ struct mei_cl *mei_cl_bus_find_cl_by_uuid(struct mei_device *dev, uuid_le uuid); * when being probed and shall use it for doing ME bus I/O. * * @dev: linux driver model device pointer + * @me_cl: me client * @cl: mei client * @ops: ME transport ops * @event_work: async work to execute event callback @@ -380,6 +383,7 @@ struct mei_cl *mei_cl_bus_find_cl_by_uuid(struct mei_device *dev, uuid_le uuid); struct mei_cl_device { struct device dev; + struct mei_me_client *me_cl; struct mei_cl *cl; const struct mei_cl_ops *ops; @@ -653,7 +657,7 @@ void mei_irq_compl_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list); */ void mei_amthif_reset_params(struct mei_device *dev); -int mei_amthif_host_init(struct mei_device *dev); +int mei_amthif_host_init(struct mei_device *dev, struct mei_me_client *me_cl); int mei_amthif_read(struct mei_device *dev, struct file *file, char __user *ubuf, size_t length, loff_t *offset); @@ -680,7 +684,7 @@ int mei_amthif_irq_read(struct mei_device *dev, s32 *slots); /* * NFC functions */ -int mei_nfc_host_init(struct mei_device *dev); +int mei_nfc_host_init(struct mei_device *dev, struct mei_me_client *me_cl); void mei_nfc_host_exit(struct mei_device *dev); /* @@ -690,7 +694,7 @@ extern const uuid_le mei_nfc_guid; int mei_wd_send(struct mei_device *dev); int mei_wd_stop(struct mei_device *dev); -int mei_wd_host_init(struct mei_device *dev); +int mei_wd_host_init(struct mei_device *dev, struct mei_me_client *me_cl); /* * mei_watchdog_register - Registering watchdog interface * once we got connection to the WD Client diff --git a/drivers/misc/mei/nfc.c b/drivers/misc/mei/nfc.c index c3bcb63..e2a6ba0 100644 --- a/drivers/misc/mei/nfc.c +++ b/drivers/misc/mei/nfc.c @@ -91,6 +91,7 @@ struct mei_nfc_hci_hdr { /** * struct mei_nfc_dev - NFC mei device * + * @me_cl: NFC me client * @cl: NFC host client * @cl_info: NFC info host client * @init_work: perform connection to the info client @@ -104,6 +105,7 @@ struct mei_nfc_hci_hdr { * @recv_req_id: reception message counter */ struct mei_nfc_dev { + struct mei_me_client *me_cl; struct mei_cl *cl; struct mei_cl *cl_info; struct work_struct init_work; @@ -151,6 +153,7 @@ static void mei_nfc_free(struct mei_nfc_dev *ndev) kfree(ndev->cl_info); } + mei_me_cl_put(ndev->me_cl); kfree(ndev); } @@ -417,6 +420,7 @@ static void mei_nfc_init(struct work_struct *work) struct mei_cl_device *cldev; struct mei_nfc_dev *ndev; struct mei_cl *cl_info; + struct mei_me_client *me_cl_info; ndev = container_of(work, struct mei_nfc_dev, init_work); @@ -425,13 +429,22 @@ static void mei_nfc_init(struct work_struct *work) mutex_lock(&dev->device_lock); - if (mei_cl_connect(cl_info, NULL) < 0) { + /* check for valid client id */ + me_cl_info = mei_me_cl_by_uuid(dev, &mei_nfc_info_guid); + if (!me_cl_info) { + mutex_unlock(&dev->device_lock); + dev_info(dev->dev, "nfc: failed to find the info client\n"); + goto err; + } + + if (mei_cl_connect(cl_info, me_cl_info, NULL) < 0) { + mei_me_cl_put(me_cl_info); mutex_unlock(&dev->device_lock); dev_err(dev->dev, "Could not connect to the NFC INFO ME client"); goto err; } - + mei_me_cl_put(me_cl_info); mutex_unlock(&dev->device_lock); if (mei_nfc_if_version(ndev) < 0) { @@ -459,7 +472,8 @@ static void mei_nfc_init(struct work_struct *work) return; } - cldev = mei_cl_add_device(dev, mei_nfc_guid, ndev->bus_name, &nfc_ops); + cldev = mei_cl_add_device(dev, ndev->me_cl, ndev->cl, + ndev->bus_name, &nfc_ops); if (!cldev) { dev_err(dev->dev, "Could not add the NFC device to the MEI bus\n"); @@ -479,11 +493,10 @@ err: } -int mei_nfc_host_init(struct mei_device *dev) +int mei_nfc_host_init(struct mei_device *dev, struct mei_me_client *me_cl) { struct mei_nfc_dev *ndev; struct mei_cl *cl_info, *cl; - struct mei_me_client *me_cl = NULL; int ret; @@ -500,11 +513,9 @@ int mei_nfc_host_init(struct mei_device *dev) goto err; } - /* check for valid client id */ - me_cl = mei_me_cl_by_uuid(dev, &mei_nfc_info_guid); - if (!me_cl) { - dev_info(dev->dev, "nfc: failed to find the client\n"); - ret = -ENOTTY; + ndev->me_cl = mei_me_cl_get(me_cl); + if (!ndev->me_cl) { + ret = -ENODEV; goto err; } @@ -514,34 +525,16 @@ int mei_nfc_host_init(struct mei_device *dev) goto err; } - cl_info->me_client_id = me_cl->client_id; - cl_info->cl_uuid = me_cl->props.protocol_name; - mei_me_cl_put(me_cl); - me_cl = NULL; - list_add_tail(&cl_info->device_link, &dev->device_list); ndev->cl_info = cl_info; - /* check for valid client id */ - me_cl = mei_me_cl_by_uuid(dev, &mei_nfc_guid); - if (!me_cl) { - dev_info(dev->dev, "nfc: failed to find the client\n"); - ret = -ENOTTY; - goto err; - } - cl = mei_cl_alloc_linked(dev, MEI_HOST_CLIENT_ID_ANY); if (IS_ERR(cl)) { ret = PTR_ERR(cl); goto err; } - cl->me_client_id = me_cl->client_id; - cl->cl_uuid = me_cl->props.protocol_name; - mei_me_cl_put(me_cl); - me_cl = NULL; - list_add_tail(&cl->device_link, &dev->device_list); ndev->cl = cl; @@ -555,7 +548,6 @@ int mei_nfc_host_init(struct mei_device *dev) return 0; err: - mei_me_cl_put(me_cl); mei_nfc_free(ndev); return ret; diff --git a/drivers/misc/mei/wd.c b/drivers/misc/mei/wd.c index 2725f86..2bc0f50 100644 --- a/drivers/misc/mei/wd.c +++ b/drivers/misc/mei/wd.c @@ -50,15 +50,15 @@ static void mei_wd_set_start_timeout(struct mei_device *dev, u16 timeout) * mei_wd_host_init - connect to the watchdog client * * @dev: the device structure + * @me_cl: me client * * Return: -ENOTTY if wd client cannot be found * -EIO if write has failed * 0 on success */ -int mei_wd_host_init(struct mei_device *dev) +int mei_wd_host_init(struct mei_device *dev, struct mei_me_client *me_cl) { struct mei_cl *cl = &dev->wd_cl; - struct mei_me_client *me_cl; int ret; mei_cl_init(cl, dev); @@ -66,27 +66,13 @@ int mei_wd_host_init(struct mei_device *dev) dev->wd_timeout = MEI_WD_DEFAULT_TIMEOUT; dev->wd_state = MEI_WD_IDLE; - - /* check for valid client id */ - me_cl = mei_me_cl_by_uuid(dev, &mei_wd_guid); - if (!me_cl) { - dev_info(dev->dev, "wd: failed to find the client\n"); - return -ENOTTY; - } - - cl->me_client_id = me_cl->client_id; - cl->cl_uuid = me_cl->props.protocol_name; - mei_me_cl_put(me_cl); - ret = mei_cl_link(cl, MEI_WD_HOST_CLIENT_ID); - if (ret < 0) { dev_info(dev->dev, "wd: failed link client\n"); return ret; } - ret = mei_cl_connect(cl, NULL); - + ret = mei_cl_connect(cl, me_cl, NULL); if (ret) { dev_err(dev->dev, "wd: failed to connect = %d\n", ret); mei_cl_unlink(cl); @@ -118,7 +104,7 @@ int mei_wd_send(struct mei_device *dev) int ret; hdr.host_addr = cl->host_client_id; - hdr.me_addr = cl->me_client_id; + hdr.me_addr = mei_cl_me_id(cl); hdr.msg_complete = 1; hdr.reserved = 0; hdr.internal = 0; 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