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mei: fixed address clients for the new platforms
Enable by default connection to fixed address clients from user-space for skylake and newer platform. Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
06ee536bcb
commit
f4e0624618
5 changed files with 57 additions and 6 deletions
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@ -176,6 +176,8 @@ static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf,
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dev->hbm_f_dot_supported);
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pos += scnprintf(buf + pos, bufsz - pos, "\tEV: %01d\n",
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dev->hbm_f_ev_supported);
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pos += scnprintf(buf + pos, bufsz - pos, "\tFA: %01d\n",
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dev->hbm_f_fa_supported);
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}
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pos += scnprintf(buf + pos, bufsz - pos, "pg: %s, %s\n",
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@ -191,6 +193,30 @@ static const struct file_operations mei_dbgfs_fops_devstate = {
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.llseek = generic_file_llseek,
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};
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static ssize_t mei_dbgfs_write_allow_fa(struct file *file,
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const char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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struct mei_device *dev;
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int ret;
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dev = container_of(file->private_data,
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struct mei_device, allow_fixed_address);
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ret = debugfs_write_file_bool(file, user_buf, count, ppos);
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if (ret < 0)
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return ret;
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dev->override_fixed_address = true;
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return ret;
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}
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static const struct file_operations mei_dbgfs_fops_allow_fa = {
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.open = simple_open,
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.read = debugfs_read_file_bool,
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.write = mei_dbgfs_write_allow_fa,
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.llseek = generic_file_llseek,
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};
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/**
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* mei_dbgfs_deregister - Remove the debugfs files and directories
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*
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@ -240,8 +266,9 @@ int mei_dbgfs_register(struct mei_device *dev, const char *name)
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dev_err(dev->dev, "devstate: registration failed\n");
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goto err;
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}
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f = debugfs_create_bool("allow_fixed_address", S_IRUSR | S_IWUSR, dir,
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&dev->allow_fixed_address);
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f = debugfs_create_file("allow_fixed_address", S_IRUSR | S_IWUSR, dir,
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&dev->allow_fixed_address,
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&mei_dbgfs_fops_allow_fa);
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if (!f) {
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dev_err(dev->dev, "allow_fixed_address: registration failed\n");
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goto err;
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@ -979,6 +979,10 @@ static void mei_hbm_config_features(struct mei_device *dev)
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/* Notification Event Support */
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if (dev->version.major_version >= HBM_MAJOR_VERSION_EV)
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dev->hbm_f_ev_supported = 1;
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/* Fixed Address Client Support */
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if (dev->version.major_version >= HBM_MAJOR_VERSION_FA)
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dev->hbm_f_fa_supported = 1;
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}
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/**
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@ -64,6 +64,12 @@
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#define HBM_MINOR_VERSION_EV 0
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#define HBM_MAJOR_VERSION_EV 2
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/*
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* MEI version with fixed address client support
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*/
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#define HBM_MINOR_VERSION_FA 0
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#define HBM_MAJOR_VERSION_FA 2
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/* Host bus message command opcode */
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#define MEI_HBM_CMD_OP_MSK 0x7f
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/* Host bus message command RESPONSE */
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@ -369,12 +369,22 @@ static int mei_ioctl_connect_client(struct file *file,
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/* find ME client we're trying to connect to */
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me_cl = mei_me_cl_by_uuid(dev, &data->in_client_uuid);
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if (!me_cl ||
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(me_cl->props.fixed_address && !dev->allow_fixed_address)) {
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if (!me_cl) {
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dev_dbg(dev->dev, "Cannot connect to FW Client UUID = %pUl\n",
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&data->in_client_uuid);
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mei_me_cl_put(me_cl);
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return -ENOTTY;
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rets = -ENOTTY;
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goto end;
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}
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if (me_cl->props.fixed_address) {
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bool forbidden = dev->override_fixed_address ?
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!dev->allow_fixed_address : !dev->hbm_f_fa_supported;
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if (forbidden) {
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dev_dbg(dev->dev, "Connection forbidden to FW Client UUID = %pUl\n",
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&data->in_client_uuid);
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rets = -ENOTTY;
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goto end;
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}
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}
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dev_dbg(dev->dev, "Connect to FW Client ID = %d\n",
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@ -396,6 +396,7 @@ const char *mei_pg_state_str(enum mei_pg_state state);
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* @hbm_f_dc_supported : hbm feature dynamic clients
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* @hbm_f_dot_supported : hbm feature disconnect on timeout
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* @hbm_f_ev_supported : hbm feature event notification
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* @hbm_f_fa_supported : hbm feature fixed address client
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*
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* @me_clients_rwsem: rw lock over me_clients list
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* @me_clients : list of FW clients
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@ -404,6 +405,7 @@ const char *mei_pg_state_str(enum mei_pg_state state);
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* @me_client_index : last FW client index in enumeration
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*
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* @allow_fixed_address: allow user space to connect a fixed client
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* @override_fixed_address: force allow fixed address behavior
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*
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* @amthif_cmd_list : amthif list for cmd waiting
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* @iamthif_fp : file for current amthif operation
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@ -483,6 +485,7 @@ struct mei_device {
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unsigned int hbm_f_dc_supported:1;
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unsigned int hbm_f_dot_supported:1;
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unsigned int hbm_f_ev_supported:1;
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unsigned int hbm_f_fa_supported:1;
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struct rw_semaphore me_clients_rwsem;
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struct list_head me_clients;
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@ -491,6 +494,7 @@ struct mei_device {
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unsigned long me_client_index;
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bool allow_fixed_address;
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bool override_fixed_address;
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/* amthif list for cmd waiting */
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struct mei_cl_cb amthif_cmd_list;
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