diff options
| author | Tomas Winkler <tomas.winkler@intel.com> | 2022-09-08 00:51:03 +0300 |
|---|---|---|
| committer | Joonas Lahtinen <joonas.lahtinen@linux.intel.com> | 2022-09-12 15:23:10 +0300 |
| commit | 5b063995de950d45edecf25a3eac5d8a44bd0ab9 (patch) | |
| tree | 74418db65cecde6d14b038c97d4f33d450678843 /drivers/misc/mei/hw-me.h | |
| parent | 2d427248aac4e4c8daeb1a4e021f9e22eb0c8e6f (diff) | |
mei: gsc: use polling instead of interrupts
A work-around for a HW issue in XEHPSDV that manifests itself when SW reads
a gsc register when gsc is sending an interrupt. The work-around is
to disable interrupts and to use polling instead.
Cc: James Ausmus <james.ausmus@intel.com>
Signed-off-by: Vitaly Lubart <vitaly.lubart@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220907215113.1596567-7-tomas.winkler@intel.com
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Diffstat (limited to 'drivers/misc/mei/hw-me.h')
| -rw-r--r-- | drivers/misc/mei/hw-me.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/misc/mei/hw-me.h b/drivers/misc/mei/hw-me.h index a071c645e905..6256b36bdafd 100644 --- a/drivers/misc/mei/hw-me.h +++ b/drivers/misc/mei/hw-me.h @@ -1,6 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0 */ /* - * Copyright (c) 2012-2020, Intel Corporation. All rights reserved. + * Copyright (c) 2012-2022, Intel Corporation. All rights reserved. * Intel Management Engine Interface (Intel MEI) Linux driver */ @@ -51,6 +51,9 @@ struct mei_cfg { * @d0i3_supported: di03 support * @hbuf_depth: depth of hardware host/write buffer in slots * @read_fws: read FW status register handler + * @polling_thread: interrupt polling thread + * @wait_active: the polling thread activity wait queue + * @is_active: the device is active */ struct mei_me_hw { const struct mei_cfg *cfg; @@ -60,10 +63,19 @@ struct mei_me_hw { bool d0i3_supported; u8 hbuf_depth; int (*read_fws)(const struct mei_device *dev, int where, u32 *val); + /* polling */ + struct task_struct *polling_thread; + wait_queue_head_t wait_active; + bool is_active; }; #define to_me_hw(dev) (struct mei_me_hw *)((dev)->hw) +static inline bool mei_me_hw_use_polling(const struct mei_me_hw *hw) +{ + return hw->irq < 0; +} + /** * enum mei_cfg_idx - indices to platform specific configurations. * @@ -127,5 +139,6 @@ int mei_me_pg_exit_sync(struct mei_device *dev); irqreturn_t mei_me_irq_quick_handler(int irq, void *dev_id); irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id); +int mei_me_polling_thread(void *_dev); #endif /* _MEI_INTERFACE_H_ */ |