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mei: implement mei_cl_connect function
Implement mei_cl_connect that warps host client parts of the connection and leave the ioctl specifics in the mei_ioctl_connect_client function. Move mei_ioctl_connect_client to main.c where it belongs Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tomas Winkler
Greg Kroah-Hartman
parent
90e0b5f185
commit
9f81abdac3
@ -460,6 +460,71 @@ bool mei_cl_is_other_connecting(struct mei_cl *cl)
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return false;
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}
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/**
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* mei_cl_connect - connect host clinet to the me one
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*
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* @cl: host client
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*
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* Locking: called under "dev->device_lock" lock
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*
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* returns 0 on success, <0 on failure.
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*/
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int mei_cl_connect(struct mei_cl *cl, struct file *file)
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{
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struct mei_device *dev;
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struct mei_cl_cb *cb;
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long timeout = mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT);
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int rets;
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if (WARN_ON(!cl || !cl->dev))
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return -ENODEV;
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dev = cl->dev;
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cb = mei_io_cb_init(cl, file);
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if (!cb) {
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rets = -ENOMEM;
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goto out;
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}
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cb->fop_type = MEI_FOP_IOCTL;
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if (dev->mei_host_buffer_is_empty &&
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!mei_cl_is_other_connecting(cl)) {
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dev->mei_host_buffer_is_empty = false;
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if (mei_hbm_cl_connect_req(dev, cl)) {
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rets = -ENODEV;
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goto out;
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}
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cl->timer_count = MEI_CONNECT_TIMEOUT;
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list_add_tail(&cb->list, &dev->ctrl_rd_list.list);
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} else {
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list_add_tail(&cb->list, &dev->ctrl_wr_list.list);
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}
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mutex_unlock(&dev->device_lock);
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rets = wait_event_timeout(dev->wait_recvd_msg,
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(cl->state == MEI_FILE_CONNECTED ||
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cl->state == MEI_FILE_DISCONNECTED),
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timeout * HZ);
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mutex_lock(&dev->device_lock);
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if (cl->state != MEI_FILE_CONNECTED) {
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rets = -EFAULT;
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mei_io_list_flush(&dev->ctrl_rd_list, cl);
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mei_io_list_flush(&dev->ctrl_wr_list, cl);
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goto out;
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}
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rets = cl->status;
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out:
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mei_io_cb_free(cb);
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return rets;
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}
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/**
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* mei_cl_flow_ctrl_creds - checks flow_control credits for cl.
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*
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@ -542,160 +607,6 @@ int mei_cl_flow_ctrl_reduce(struct mei_cl *cl)
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return -ENOENT;
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}
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/**
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* mei_ioctl_connect_client - the connect to fw client IOCTL function
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*
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* @dev: the device structure
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* @data: IOCTL connect data, input and output parameters
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* @file: private data of the file object
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*
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* Locking: called under "dev->device_lock" lock
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*
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* returns 0 on success, <0 on failure.
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*/
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int mei_ioctl_connect_client(struct file *file,
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struct mei_connect_client_data *data)
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{
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struct mei_device *dev;
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struct mei_cl_cb *cb;
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struct mei_client *client;
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struct mei_cl *cl;
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long timeout = mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT);
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int i;
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int err;
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int rets;
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cl = file->private_data;
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if (WARN_ON(!cl || !cl->dev))
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return -ENODEV;
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dev = cl->dev;
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dev_dbg(&dev->pdev->dev, "mei_ioctl_connect_client() Entry\n");
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/* buffered ioctl cb */
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cb = mei_io_cb_init(cl, file);
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if (!cb) {
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rets = -ENOMEM;
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goto end;
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}
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cb->fop_type = MEI_FOP_IOCTL;
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if (dev->dev_state != MEI_DEV_ENABLED) {
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rets = -ENODEV;
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goto end;
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}
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if (cl->state != MEI_FILE_INITIALIZING &&
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cl->state != MEI_FILE_DISCONNECTED) {
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rets = -EBUSY;
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goto end;
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}
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/* find ME client we're trying to connect to */
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i = mei_me_cl_by_uuid(dev, &data->in_client_uuid);
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if (i >= 0 && !dev->me_clients[i].props.fixed_address) {
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cl->me_client_id = dev->me_clients[i].client_id;
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cl->state = MEI_FILE_CONNECTING;
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}
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dev_dbg(&dev->pdev->dev, "Connect to FW Client ID = %d\n",
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cl->me_client_id);
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dev_dbg(&dev->pdev->dev, "FW Client - Protocol Version = %d\n",
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dev->me_clients[i].props.protocol_version);
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dev_dbg(&dev->pdev->dev, "FW Client - Max Msg Len = %d\n",
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dev->me_clients[i].props.max_msg_length);
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/* if we're connecting to amthi client then we will use the
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* existing connection
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*/
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if (uuid_le_cmp(data->in_client_uuid, mei_amthi_guid) == 0) {
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dev_dbg(&dev->pdev->dev, "FW Client is amthi\n");
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if (dev->iamthif_cl.state != MEI_FILE_CONNECTED) {
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rets = -ENODEV;
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goto end;
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}
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clear_bit(cl->host_client_id, dev->host_clients_map);
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mei_cl_unlink(cl);
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kfree(cl);
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cl = NULL;
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file->private_data = &dev->iamthif_cl;
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client = &data->out_client_properties;
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client->max_msg_length =
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dev->me_clients[i].props.max_msg_length;
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client->protocol_version =
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dev->me_clients[i].props.protocol_version;
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rets = dev->iamthif_cl.status;
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goto end;
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}
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if (cl->state != MEI_FILE_CONNECTING) {
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rets = -ENODEV;
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goto end;
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}
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/* prepare the output buffer */
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client = &data->out_client_properties;
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client->max_msg_length = dev->me_clients[i].props.max_msg_length;
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client->protocol_version = dev->me_clients[i].props.protocol_version;
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dev_dbg(&dev->pdev->dev, "Can connect?\n");
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if (dev->mei_host_buffer_is_empty &&
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!mei_cl_is_other_connecting(cl)) {
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dev_dbg(&dev->pdev->dev, "Sending Connect Message\n");
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dev->mei_host_buffer_is_empty = false;
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if (mei_hbm_cl_connect_req(dev, cl)) {
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dev_dbg(&dev->pdev->dev, "Sending connect message - failed\n");
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rets = -ENODEV;
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goto end;
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} else {
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dev_dbg(&dev->pdev->dev, "Sending connect message - succeeded\n");
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cl->timer_count = MEI_CONNECT_TIMEOUT;
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list_add_tail(&cb->list, &dev->ctrl_rd_list.list);
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}
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} else {
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dev_dbg(&dev->pdev->dev, "Queuing the connect request due to device busy\n");
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dev_dbg(&dev->pdev->dev, "add connect cb to control write list.\n");
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list_add_tail(&cb->list, &dev->ctrl_wr_list.list);
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}
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mutex_unlock(&dev->device_lock);
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err = wait_event_timeout(dev->wait_recvd_msg,
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(MEI_FILE_CONNECTED == cl->state ||
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MEI_FILE_DISCONNECTED == cl->state), timeout);
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mutex_lock(&dev->device_lock);
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if (MEI_FILE_CONNECTED == cl->state) {
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dev_dbg(&dev->pdev->dev, "successfully connected to FW client.\n");
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rets = cl->status;
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goto end;
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} else {
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dev_dbg(&dev->pdev->dev, "failed to connect to FW client.cl->state = %d.\n",
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cl->state);
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if (!err) {
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dev_dbg(&dev->pdev->dev,
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"wait_event_interruptible_timeout failed on client"
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" connect message fw response message.\n");
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}
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rets = -EFAULT;
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mei_io_list_flush(&dev->ctrl_rd_list, cl);
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mei_io_list_flush(&dev->ctrl_wr_list, cl);
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goto end;
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}
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rets = 0;
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end:
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dev_dbg(&dev->pdev->dev, "free connect cb memory.");
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mei_io_cb_free(cb);
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return rets;
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}
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/**
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* mei_cl_start_read - the start read client message function.
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*
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@ -562,6 +562,103 @@ err:
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return rets;
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}
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/**
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* mei_ioctl_connect_client - the connect to fw client IOCTL function
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*
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* @dev: the device structure
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* @data: IOCTL connect data, input and output parameters
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* @file: private data of the file object
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*
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* Locking: called under "dev->device_lock" lock
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*
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* returns 0 on success, <0 on failure.
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*/
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static int mei_ioctl_connect_client(struct file *file,
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struct mei_connect_client_data *data)
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{
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struct mei_device *dev;
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struct mei_client *client;
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struct mei_cl *cl;
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int i;
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int rets;
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cl = file->private_data;
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if (WARN_ON(!cl || !cl->dev))
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return -ENODEV;
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dev = cl->dev;
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if (dev->dev_state != MEI_DEV_ENABLED) {
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rets = -ENODEV;
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goto end;
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}
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if (cl->state != MEI_FILE_INITIALIZING &&
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cl->state != MEI_FILE_DISCONNECTED) {
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rets = -EBUSY;
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goto end;
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}
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/* find ME client we're trying to connect to */
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i = mei_me_cl_by_uuid(dev, &data->in_client_uuid);
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if (i >= 0 && !dev->me_clients[i].props.fixed_address) {
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cl->me_client_id = dev->me_clients[i].client_id;
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cl->state = MEI_FILE_CONNECTING;
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}
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dev_dbg(&dev->pdev->dev, "Connect to FW Client ID = %d\n",
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cl->me_client_id);
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dev_dbg(&dev->pdev->dev, "FW Client - Protocol Version = %d\n",
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dev->me_clients[i].props.protocol_version);
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dev_dbg(&dev->pdev->dev, "FW Client - Max Msg Len = %d\n",
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dev->me_clients[i].props.max_msg_length);
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/* if we're connecting to amthi client then we will use the
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* existing connection
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*/
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if (uuid_le_cmp(data->in_client_uuid, mei_amthi_guid) == 0) {
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dev_dbg(&dev->pdev->dev, "FW Client is amthi\n");
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if (dev->iamthif_cl.state != MEI_FILE_CONNECTED) {
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rets = -ENODEV;
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goto end;
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}
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clear_bit(cl->host_client_id, dev->host_clients_map);
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mei_cl_unlink(cl);
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kfree(cl);
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cl = NULL;
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file->private_data = &dev->iamthif_cl;
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client = &data->out_client_properties;
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client->max_msg_length =
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dev->me_clients[i].props.max_msg_length;
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client->protocol_version =
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dev->me_clients[i].props.protocol_version;
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rets = dev->iamthif_cl.status;
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goto end;
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}
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if (cl->state != MEI_FILE_CONNECTING) {
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rets = -ENODEV;
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goto end;
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}
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/* prepare the output buffer */
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client = &data->out_client_properties;
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client->max_msg_length = dev->me_clients[i].props.max_msg_length;
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client->protocol_version = dev->me_clients[i].props.protocol_version;
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dev_dbg(&dev->pdev->dev, "Can connect?\n");
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rets = mei_cl_connect(cl, file);
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end:
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dev_dbg(&dev->pdev->dev, "free connect cb memory.");
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return rets;
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}
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/**
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* mei_ioctl - the IOCTL function
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@ -610,6 +707,7 @@ static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data)
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rets = -EFAULT;
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goto out;
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}
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rets = mei_ioctl_connect_client(file, connect_data);
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/* if all is ok, copying the data back to user. */
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@ -340,11 +340,6 @@ irqreturn_t mei_interrupt_quick_handler(int irq, void *dev_id);
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irqreturn_t mei_interrupt_thread_handler(int irq, void *dev_id);
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void mei_timer(struct work_struct *work);
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/*
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* MEI input output function prototype
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*/
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int mei_ioctl_connect_client(struct file *file,
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struct mei_connect_client_data *data);
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/*
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* AMTHIF - AMT Host Interface Functions
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*/
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