b8229bedd1
Add a debug option to the SGI GRU driver for flushing GRU cache lines from memory. In theory this is not needed but it is useful for debugging. This has no use by end users. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
161 lines
4 KiB
C
161 lines
4 KiB
C
/*
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* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __GRULIB_H__
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#define __GRULIB_H__
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#define GRU_BASENAME "gru"
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#define GRU_FULLNAME "/dev/gru"
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#define GRU_IOCTL_NUM 'G'
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/*
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* Maximum number of GRU segments that a user can have open
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* ZZZ temp - set high for testing. Revisit.
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*/
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#define GRU_MAX_OPEN_CONTEXTS 32
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/* Set Number of Request Blocks */
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#define GRU_CREATE_CONTEXT _IOWR(GRU_IOCTL_NUM, 1, void *)
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/* Set Context Options */
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#define GRU_SET_CONTEXT_OPTION _IOWR(GRU_IOCTL_NUM, 4, void *)
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/* Fetch exception detail */
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#define GRU_USER_GET_EXCEPTION_DETAIL _IOWR(GRU_IOCTL_NUM, 6, void *)
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/* For user call_os handling - normally a TLB fault */
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#define GRU_USER_CALL_OS _IOWR(GRU_IOCTL_NUM, 8, void *)
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/* For user unload context */
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#define GRU_USER_UNLOAD_CONTEXT _IOWR(GRU_IOCTL_NUM, 9, void *)
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/* For dumpping GRU chiplet state */
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#define GRU_DUMP_CHIPLET_STATE _IOWR(GRU_IOCTL_NUM, 11, void *)
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/* For getting gseg statistics */
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#define GRU_GET_GSEG_STATISTICS _IOWR(GRU_IOCTL_NUM, 12, void *)
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/* For user TLB flushing (primarily for tests) */
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#define GRU_USER_FLUSH_TLB _IOWR(GRU_IOCTL_NUM, 50, void *)
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/* Get some config options (primarily for tests & emulator) */
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#define GRU_GET_CONFIG_INFO _IOWR(GRU_IOCTL_NUM, 51, void *)
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/* Various kernel self-tests */
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#define GRU_KTEST _IOWR(GRU_IOCTL_NUM, 52, void *)
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#define CONTEXT_WINDOW_BYTES(th) (GRU_GSEG_PAGESIZE * (th))
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#define THREAD_POINTER(p, th) (p + GRU_GSEG_PAGESIZE * (th))
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#define GSEG_START(cb) ((void *)((unsigned long)(cb) & ~(GRU_GSEG_PAGESIZE - 1)))
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/*
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* Statictics kept on a per-GTS basis.
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*/
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struct gts_statistics {
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unsigned long fmm_tlbdropin;
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unsigned long upm_tlbdropin;
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unsigned long context_stolen;
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};
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struct gru_get_gseg_statistics_req {
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unsigned long gseg;
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struct gts_statistics stats;
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};
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/*
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* Structure used to pass TLB flush parameters to the driver
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*/
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struct gru_create_context_req {
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unsigned long gseg;
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unsigned int data_segment_bytes;
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unsigned int control_blocks;
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unsigned int maximum_thread_count;
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unsigned int options;
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};
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/*
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* Structure used to pass unload context parameters to the driver
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*/
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struct gru_unload_context_req {
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unsigned long gseg;
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};
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/*
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* Structure used to set context options
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*/
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enum {sco_gseg_owner, sco_cch_req_slice, sco_blade_chiplet};
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struct gru_set_context_option_req {
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unsigned long gseg;
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int op;
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int val0;
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long val1;
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};
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/*
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* Structure used to pass TLB flush parameters to the driver
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*/
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struct gru_flush_tlb_req {
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unsigned long gseg;
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unsigned long vaddr;
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size_t len;
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};
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/*
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* Structure used to pass TLB flush parameters to the driver
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*/
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enum {dcs_pid, dcs_gid};
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struct gru_dump_chiplet_state_req {
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unsigned int op;
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unsigned int gid;
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int ctxnum;
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char data_opt;
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char lock_cch;
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char flush_cbrs;
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char fill[10];
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pid_t pid;
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void *buf;
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size_t buflen;
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/* ---- output --- */
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unsigned int num_contexts;
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};
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#define GRU_DUMP_MAGIC 0x3474ab6c
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struct gru_dump_context_header {
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unsigned int magic;
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unsigned int gid;
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unsigned char ctxnum;
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unsigned char cbrcnt;
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unsigned char dsrcnt;
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pid_t pid;
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unsigned long vaddr;
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int cch_locked;
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unsigned long data[0];
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};
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/*
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* GRU configuration info (temp - for testing)
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*/
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struct gru_config_info {
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int cpus;
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int blades;
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int nodes;
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int chiplets;
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int fill[16];
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};
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#endif /* __GRULIB_H__ */
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