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b8ace0833f
The hardwall drain code was not properly implemented for tilegx,
just tilepro, so you couldn't reliably restart an application that
made use of the udn.
In addition, the code was only applicable to the udn (user dynamic
network). On tilegx there is a second user network that is available
(the "idn"), and there is support for having I/O shims deliver
user-level interrupts to applications ("ipi") which functions in a
very similar way to the inter-core permissions used for udn/idn.
So this change also generalizes the code from supporting just the udn
to supports udn/idn/ipi on tilegx.
By default we now use /dev/hardwall/{udn,idn,ipi} with separate
minor numbers for the three devices.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/*
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* Copyright 2010 Tilera Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for
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* more details.
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*/
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#ifndef _ASM_TILE_SETUP_H
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#define _ASM_TILE_SETUP_H
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#define COMMAND_LINE_SIZE 2048
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#ifdef __KERNEL__
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#include <linux/pfn.h>
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#include <linux/init.h>
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/*
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* Reserved space for vmalloc and iomap - defined in asm/page.h
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*/
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#define MAXMEM_PFN PFN_DOWN(MAXMEM)
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void early_panic(const char *fmt, ...);
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void warn_early_printk(void);
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void __init disable_early_printk(void);
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/* Init-time routine to do tile-specific per-cpu setup. */
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void setup_cpu(int boot);
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/* User-level DMA management functions */
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void grant_dma_mpls(void);
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void restrict_dma_mpls(void);
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#ifdef CONFIG_HARDWALL
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/* User-level network management functions */
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void reset_network_state(void);
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struct task_struct;
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void hardwall_switch_tasks(struct task_struct *prev, struct task_struct *next);
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void hardwall_deactivate_all(struct task_struct *task);
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int hardwall_ipi_valid(int cpu);
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/* Hook hardwall code into changes in affinity. */
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#define arch_set_cpus_allowed(p, new_mask) do { \
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if (!cpumask_equal(&p->cpus_allowed, new_mask)) \
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hardwall_deactivate_all(p); \
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} while (0)
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#endif
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#endif /* __KERNEL__ */
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#endif /* _ASM_TILE_SETUP_H */
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