diff options
Diffstat (limited to 'drivers/misc/mei/init.c')
| -rw-r--r-- | drivers/misc/mei/init.c | 144 |
1 files changed, 86 insertions, 58 deletions
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index d2f691424dd1..b789c4d9c709 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -1,17 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0 /* - * + * Copyright (c) 2012-2022, Intel Corporation. All rights reserved. * Intel Management Engine Interface (Intel MEI) Linux driver - * Copyright (c) 2003-2012, Intel Corporation. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * */ #include <linux/export.h> @@ -34,6 +24,7 @@ const char *mei_dev_state_str(int state) MEI_DEV_STATE(ENABLED); MEI_DEV_STATE(RESETTING); MEI_DEV_STATE(DISABLED); + MEI_DEV_STATE(POWERING_DOWN); MEI_DEV_STATE(POWER_DOWN); MEI_DEV_STATE(POWER_UP); default: @@ -118,8 +109,13 @@ int mei_reset(struct mei_device *dev) char fw_sts_str[MEI_FW_STATUS_STR_SZ]; mei_fw_status_str(dev, fw_sts_str, MEI_FW_STATUS_STR_SZ); - dev_warn(dev->dev, "unexpected reset: dev_state = %s fw status = %s\n", - mei_dev_state_str(state), fw_sts_str); + if (kind_is_gsc(dev) || kind_is_gscfi(dev)) { + dev_dbg(&dev->dev, "unexpected reset: dev_state = %s fw status = %s\n", + mei_dev_state_str(state), fw_sts_str); + } else { + dev_warn(&dev->dev, "unexpected reset: dev_state = %s fw status = %s\n", + mei_dev_state_str(state), fw_sts_str); + } } mei_clear_interrupts(dev); @@ -133,12 +129,12 @@ int mei_reset(struct mei_device *dev) /* enter reset flow */ interrupts_enabled = state != MEI_DEV_POWER_DOWN; - dev->dev_state = MEI_DEV_RESETTING; + mei_set_devstate(dev, MEI_DEV_RESETTING); dev->reset_count++; if (dev->reset_count > MEI_MAX_CONSEC_RESET) { - dev_err(dev->dev, "reset: reached maximal consecutive resets: disabling the device\n"); - dev->dev_state = MEI_DEV_DISABLED; + dev_err(&dev->dev, "reset: reached maximal consecutive resets: disabling the device\n"); + mei_set_devstate(dev, MEI_DEV_DISABLED); return -ENODEV; } @@ -151,32 +147,43 @@ int mei_reset(struct mei_device *dev) mei_hbm_reset(dev); - dev->rd_msg_hdr = 0; + /* clean stale FW version */ + dev->fw_ver_received = 0; + + memset(dev->rd_msg_hdr, 0, sizeof(dev->rd_msg_hdr)); if (ret) { - dev_err(dev->dev, "hw_reset failed ret = %d\n", ret); + dev_err(&dev->dev, "hw_reset failed ret = %d\n", ret); return ret; } if (state == MEI_DEV_POWER_DOWN) { - dev_dbg(dev->dev, "powering down: end of reset\n"); - dev->dev_state = MEI_DEV_DISABLED; + dev_dbg(&dev->dev, "powering down: end of reset\n"); + mei_set_devstate(dev, MEI_DEV_DISABLED); return 0; } ret = mei_hw_start(dev); if (ret) { - dev_err(dev->dev, "hw_start failed ret = %d\n", ret); + char fw_sts_str[MEI_FW_STATUS_STR_SZ]; + + mei_fw_status_str(dev, fw_sts_str, MEI_FW_STATUS_STR_SZ); + dev_err(&dev->dev, "hw_start failed ret = %d fw status = %s\n", ret, fw_sts_str); return ret; } - dev_dbg(dev->dev, "link is established start sending messages.\n"); + if (dev->dev_state != MEI_DEV_RESETTING) { + dev_dbg(&dev->dev, "wrong state = %d on link start\n", dev->dev_state); + return 0; + } - dev->dev_state = MEI_DEV_INIT_CLIENTS; + dev_dbg(&dev->dev, "link is established start sending messages.\n"); + + mei_set_devstate(dev, MEI_DEV_INIT_CLIENTS); ret = mei_hbm_start_req(dev); if (ret) { - dev_err(dev->dev, "hbm_start failed ret = %d\n", ret); - dev->dev_state = MEI_DEV_RESETTING; + dev_err(&dev->dev, "hbm_start failed ret = %d\n", ret); + mei_set_devstate(dev, MEI_DEV_RESETTING); return ret; } @@ -200,48 +207,40 @@ int mei_start(struct mei_device *dev) /* acknowledge interrupt and stop interrupts */ mei_clear_interrupts(dev); - mei_hw_config(dev); + ret = mei_hw_config(dev); + if (ret) + goto err; - dev_dbg(dev->dev, "reset in start the mei device.\n"); + dev_dbg(&dev->dev, "reset in start the mei device.\n"); dev->reset_count = 0; do { - dev->dev_state = MEI_DEV_INITIALIZING; + mei_set_devstate(dev, MEI_DEV_INITIALIZING); ret = mei_reset(dev); if (ret == -ENODEV || dev->dev_state == MEI_DEV_DISABLED) { - dev_err(dev->dev, "reset failed ret = %d", ret); + dev_err(&dev->dev, "reset failed ret = %d", ret); goto err; } } while (ret); if (mei_hbm_start_wait(dev)) { - dev_err(dev->dev, "HBM haven't started"); - goto err; - } - - if (!mei_host_is_ready(dev)) { - dev_err(dev->dev, "host is not ready.\n"); - goto err; - } - - if (!mei_hw_is_ready(dev)) { - dev_err(dev->dev, "ME is not ready.\n"); + dev_err(&dev->dev, "HBM haven't started"); goto err; } if (!mei_hbm_version_is_supported(dev)) { - dev_dbg(dev->dev, "MEI start failed.\n"); + dev_dbg(&dev->dev, "MEI start failed.\n"); goto err; } - dev_dbg(dev->dev, "link layer has been established.\n"); + dev_dbg(&dev->dev, "link layer has been established.\n"); mutex_unlock(&dev->device_lock); return 0; err: - dev_err(dev->dev, "link layer initialization failed.\n"); - dev->dev_state = MEI_DEV_DISABLED; + dev_err(&dev->dev, "link layer initialization failed.\n"); + mei_set_devstate(dev, MEI_DEV_DISABLED); mutex_unlock(&dev->device_lock); return -ENODEV; } @@ -260,7 +259,7 @@ int mei_restart(struct mei_device *dev) mutex_lock(&dev->device_lock); - dev->dev_state = MEI_DEV_POWER_UP; + mei_set_devstate(dev, MEI_DEV_POWER_UP); dev->reset_count = 0; err = mei_reset(dev); @@ -268,7 +267,7 @@ int mei_restart(struct mei_device *dev) mutex_unlock(&dev->device_lock); if (err == -ENODEV || dev->dev_state == MEI_DEV_DISABLED) { - dev_err(dev->dev, "device disabled = %d\n", err); + dev_err(&dev->dev, "device disabled = %d\n", err); return -ENODEV; } @@ -297,7 +296,7 @@ static void mei_reset_work(struct work_struct *work) mutex_unlock(&dev->device_lock); if (dev->dev_state == MEI_DEV_DISABLED) { - dev_err(dev->dev, "device disabled = %d\n", ret); + dev_err(&dev->dev, "device disabled = %d\n", ret); return; } @@ -308,21 +307,28 @@ static void mei_reset_work(struct work_struct *work) void mei_stop(struct mei_device *dev) { - dev_dbg(dev->dev, "stopping the device.\n"); + dev_dbg(&dev->dev, "stopping the device.\n"); + mutex_lock(&dev->device_lock); + mei_set_devstate(dev, MEI_DEV_POWERING_DOWN); + mutex_unlock(&dev->device_lock); mei_cl_bus_remove_devices(dev); + mutex_lock(&dev->device_lock); + mei_set_devstate(dev, MEI_DEV_POWER_DOWN); + mutex_unlock(&dev->device_lock); mei_cancel_work(dev); mei_clear_interrupts(dev); mei_synchronize_irq(dev); + /* to catch HW-initiated reset */ + mei_cancel_work(dev); mutex_lock(&dev->device_lock); - dev->dev_state = MEI_DEV_POWER_DOWN; mei_reset(dev); /* move device to disabled state unconditionally */ - dev->dev_state = MEI_DEV_DISABLED; + mei_set_devstate(dev, MEI_DEV_DISABLED); mutex_unlock(&dev->device_lock); } @@ -342,7 +348,7 @@ bool mei_write_is_idle(struct mei_device *dev) list_empty(&dev->write_list) && list_empty(&dev->write_waiting_list)); - dev_dbg(dev->dev, "write pg: is idle[%d] state=%s ctrl=%01d write=%01d wwait=%01d\n", + dev_dbg(&dev->dev, "write pg: is idle[%d] state=%s ctrl=%01d write=%01d wwait=%01d\n", idle, mei_dev_state_str(dev->dev_state), list_empty(&dev->ctrl_wr_list), @@ -354,14 +360,16 @@ bool mei_write_is_idle(struct mei_device *dev) EXPORT_SYMBOL_GPL(mei_write_is_idle); /** - * mei_device_init -- initialize mei_device structure + * mei_device_init - initialize mei_device structure * * @dev: the mei device - * @device: the device structure + * @parent: the parent device + * @slow_fw: configure longer timeouts as FW is slow * @hw_ops: hw operations */ void mei_device_init(struct mei_device *dev, - struct device *device, + struct device *parent, + bool slow_fw, const struct mei_hw_ops *hw_ops) { /* setup our list array */ @@ -374,13 +382,15 @@ void mei_device_init(struct mei_device *dev, init_waitqueue_head(&dev->wait_hw_ready); init_waitqueue_head(&dev->wait_pg); init_waitqueue_head(&dev->wait_hbm_start); - dev->dev_state = MEI_DEV_INITIALIZING; + dev->dev_state = MEI_DEV_UNINITIALIZED; + init_waitqueue_head(&dev->wait_dev_state); dev->reset_count = 0; INIT_LIST_HEAD(&dev->write_list); INIT_LIST_HEAD(&dev->write_waiting_list); INIT_LIST_HEAD(&dev->ctrl_wr_list); INIT_LIST_HEAD(&dev->ctrl_rd_list); + dev->tx_queue_limit = MEI_TX_QUEUE_LIMIT_DEFAULT; INIT_DELAYED_WORK(&dev->timer_work, mei_timer); INIT_WORK(&dev->reset_work, mei_reset_work); @@ -389,6 +399,9 @@ void mei_device_init(struct mei_device *dev, bitmap_zero(dev->host_clients_map, MEI_CLIENTS_MAX); dev->open_handle_count = 0; + dev->pxp_mode = MEI_DEV_PXP_DEFAULT; + dev->gsc_reset_to_pxp = MEI_DEV_RESET_TO_PXP_DEFAULT; + /* * Reserving the first client ID * 0: Reserved for MEI Bus Message communications @@ -397,7 +410,22 @@ void mei_device_init(struct mei_device *dev, dev->pg_event = MEI_PG_EVENT_IDLE; dev->ops = hw_ops; - dev->dev = device; + dev->parent = parent; + + dev->timeouts.hw_ready = mei_secs_to_jiffies(MEI_HW_READY_TIMEOUT); + dev->timeouts.connect = MEI_CONNECT_TIMEOUT; + dev->timeouts.client_init = MEI_CLIENTS_INIT_TIMEOUT; + dev->timeouts.pgi = mei_secs_to_jiffies(MEI_PGI_TIMEOUT); + dev->timeouts.d0i3 = mei_secs_to_jiffies(MEI_D0I3_TIMEOUT); + if (slow_fw) { + dev->timeouts.cl_connect = mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT_SLOW); + dev->timeouts.hbm = mei_secs_to_jiffies(MEI_HBM_TIMEOUT_SLOW); + dev->timeouts.mkhi_recv = msecs_to_jiffies(MKHI_RCV_TIMEOUT_SLOW); + } else { + dev->timeouts.cl_connect = mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT); + dev->timeouts.hbm = mei_secs_to_jiffies(MEI_HBM_TIMEOUT); + dev->timeouts.mkhi_recv = msecs_to_jiffies(MKHI_RCV_TIMEOUT); + } + dev->timeouts.link_reset_wait = msecs_to_jiffies(MEI_LINK_RESET_WAIT_TIMEOUT_MSEC); } EXPORT_SYMBOL_GPL(mei_device_init); - |