/* * Intel_SCU 0.2: An Intel SCU IOH Based Watchdog Device * for Intel part #(s): * - AF82MP20 PCH * * Copyright (C) 2009-2010 Intel Corporation. All rights reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General * Public License as published by the Free Software Foundation. * * This program is distributed in the hope that 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. * You should have received a copy of the GNU General Public * License along with this program; if not, write to the Free * Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. * The full GNU General Public License is included in this * distribution in the file called COPYING. * */ #ifndef __INTEL_SCU_WATCHDOG_H #define __INTEL_SCU_WATCHDOG_H #define WDT_VER "0.3" /* minimum time between interrupts */ #define MIN_TIME_CYCLE 1 /* Time from warning to reboot is 2 seconds */ #define DEFAULT_SOFT_TO_HARD_MARGIN 2 #define MAX_TIME 170 #define DEFAULT_TIME 5 #define MAX_SOFT_TO_HARD_MARGIN (MAX_TIME-MIN_TIME_CYCLE) /* Ajustment to clock tick frequency to make timing come out right */ #define FREQ_ADJUSTMENT 8 struct intel_scu_watchdog_dev { ulong driver_open; ulong driver_closed; u32 timer_started; u32 timer_set; u32 threshold; u32 soft_threshold; u32 __iomem *timer_load_count_addr; u32 __iomem *timer_current_value_addr; u32 __iomem *timer_control_addr; u32 __iomem *timer_clear_interrupt_addr; u32 __iomem *timer_interrupt_status_addr; struct sfi_timer_table_entry *timer_tbl_ptr; struct notifier_block intel_scu_notifier; struct miscdevice miscdev; }; extern int sfi_mtimer_num; /* extern struct sfi_timer_table_entry *sfi_get_mtmr(int hint); */ #endif /* __INTEL_SCU_WATCHDOG_H */ calipso.h?h=nds-private-remove&id=e185934ff94466b4a449165e5f1c164a44d005f2'>commitdiff
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authorNicolai Stange <nicstange@gmail.com>2016-12-07 22:21:33 +0100
committerTejun Heo <tj@kernel.org>2016-12-07 16:29:09 -0500
commite185934ff94466b4a449165e5f1c164a44d005f2 (patch)
treec773d05d4c72292e3babd4ce1a8bd56d965ebb4c /include/net/calipso.h
parent5c3ef39738f74a3759918cc1a1ad099504f9d1b7 (diff)
libata-scsi: disable SCT Write Same for the moment
SCT Write Same support had been introduced with commit 7b2030942859 ("libata: Add support for SCT Write Same") Some problems, namely excessive userspace segfaults, had been reported at http://lkml.kernel.org/r/20160908192736.GA4356@gmail.com This lead to commit 0ce1b18c42a5 ("libata: Some drives failing on SCT Write Same") which strived to disable SCT Write Same on !ZAC devices. Due to the way this was done and to the logic in sd_config_write_same(), this didn't work for those devices that have ->max_ws_blocks > SD_MAX_WS10_BLOCKS: for these, ->no_write_same and ->max_write_same_sectors would still be non-zero, but ->ws10 == ->ws16 == 0. This would cause sd_setup_write_same_cmnd() to demultiplex REQ_OP_WRITE_SAME requests to WRITE_SAME, and these in turn aren't supported by libata-scsi: EXT4-fs (dm-1): Delayed block allocation failed for inode 2625094 at logical offset 2032 with max blocks 2 with error 121 EXT4-fs (dm-1): This should not happen!! Data will be lost 121 == EREMOTEIO is what scsi_io_completion() asserts in case of invalid opcodes. Back to the original problem of userspace segfaults: this can be tracked down to ata_format_sct_write_same() overwriting the input page. Sometimes, this page is ZERO_PAGE(0) which ceases to be filled with zeros from that point on. Since ZERO_PAGE(0) is used for userspace .bss mappings, code of the following is doomed: static char *a = NULL; /* .bss */ ... if (a) *a = 'a'; This problem is not solved by disabling SCT Write Same for !ZAC devices only. It can certainly be fixed, but the final release is quite close -- so disable SCT Write Same for all ATA devices rather than introducing some SCT key buffer allocation schemes at this point. Fixes: 7b2030942859 ("libata: Add support for SCT Write Same") Signed-off-by: Nicolai Stange <nicstange@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include/net/calipso.h')