gru: dump chiplet state
Add support for dumpping the state of an entire GRU chiplet. 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>
This commit is contained in:
Jack Steiner
Linus Torvalds
Родитель
cd1334f03f
Коммит
9cc9b056ea
|
|
@ -3,5 +3,5 @@ ifdef CONFIG_SGI_GRU_DEBUG
|
|||
endif
|
||||
|
||||
obj-$(CONFIG_SGI_GRU) := gru.o
|
||||
gru-y := grufile.o grumain.o grufault.o grutlbpurge.o gruprocfs.o grukservices.o gruhandles.o
|
||||
gru-y := grufile.o grumain.o grufault.o grutlbpurge.o gruprocfs.o grukservices.o gruhandles.o grukdump.o
|
||||
|
||||
|
|
|
|||
|
|
@ -255,6 +255,9 @@ static long gru_file_unlocked_ioctl(struct file *file, unsigned int req,
|
|||
case GRU_GET_CONFIG_INFO:
|
||||
err = gru_get_config_info(arg);
|
||||
break;
|
||||
case GRU_DUMP_CHIPLET_STATE:
|
||||
err = gru_dump_chiplet_request(arg);
|
||||
break;
|
||||
}
|
||||
return err;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -0,0 +1,218 @@
|
|||
/*
|
||||
* SN Platform GRU Driver
|
||||
*
|
||||
* Dump GRU State
|
||||
*
|
||||
* This file is subject to the terms and conditions of the GNU General Public
|
||||
* License. See the file "COPYING" in the main directory of this archive
|
||||
* for more details.
|
||||
*
|
||||
* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/spinlock.h>
|
||||
#include <linux/uaccess.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/bitops.h>
|
||||
#include <asm/uv/uv_hub.h>
|
||||
#include "gru.h"
|
||||
#include "grutables.h"
|
||||
#include "gruhandles.h"
|
||||
#include "grulib.h"
|
||||
|
||||
#define CCH_LOCK_ATTEMPTS 10
|
||||
|
||||
static int gru_user_copy_handle(void __user **dp, void *s)
|
||||
{
|
||||
if (copy_to_user(dp, s, GRU_HANDLE_BYTES))
|
||||
return -1;
|
||||
*dp += GRU_HANDLE_BYTES;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int gru_dump_context_data(void *grubase,
|
||||
struct gru_context_configuration_handle *cch,
|
||||
void __user *ubuf, int ctxnum, int dsrcnt)
|
||||
{
|
||||
void *cb, *cbe, *tfh, *gseg;
|
||||
int i, scr;
|
||||
|
||||
gseg = grubase + ctxnum * GRU_GSEG_STRIDE;
|
||||
cb = gseg + GRU_CB_BASE;
|
||||
cbe = grubase + GRU_CBE_BASE;
|
||||
tfh = grubase + GRU_TFH_BASE;
|
||||
|
||||
for_each_cbr_in_allocation_map(i, &cch->cbr_allocation_map, scr) {
|
||||
if (gru_user_copy_handle(&ubuf, cb))
|
||||
goto fail;
|
||||
if (gru_user_copy_handle(&ubuf, tfh + i * GRU_HANDLE_STRIDE))
|
||||
goto fail;
|
||||
if (gru_user_copy_handle(&ubuf, cbe + i * GRU_HANDLE_STRIDE))
|
||||
goto fail;
|
||||
cb += GRU_HANDLE_STRIDE;
|
||||
}
|
||||
if (dsrcnt)
|
||||
memcpy(ubuf, gseg + GRU_DS_BASE, dsrcnt * GRU_HANDLE_STRIDE);
|
||||
return 0;
|
||||
|
||||
fail:
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
static int gru_dump_tfm(struct gru_state *gru,
|
||||
void __user *ubuf, void __user *ubufend)
|
||||
{
|
||||
struct gru_tlb_fault_map *tfm;
|
||||
int i, ret, bytes;
|
||||
|
||||
bytes = GRU_NUM_TFM * GRU_CACHE_LINE_BYTES;
|
||||
if (bytes > ubufend - ubuf)
|
||||
ret = -EFBIG;
|
||||
|
||||
for (i = 0; i < GRU_NUM_TFM; i++) {
|
||||
tfm = get_tfm(gru->gs_gru_base_vaddr, i);
|
||||
if (gru_user_copy_handle(&ubuf, tfm))
|
||||
goto fail;
|
||||
}
|
||||
return GRU_NUM_TFM * GRU_CACHE_LINE_BYTES;
|
||||
|
||||
fail:
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
static int gru_dump_tgh(struct gru_state *gru,
|
||||
void __user *ubuf, void __user *ubufend)
|
||||
{
|
||||
struct gru_tlb_global_handle *tgh;
|
||||
int i, ret, bytes;
|
||||
|
||||
bytes = GRU_NUM_TGH * GRU_CACHE_LINE_BYTES;
|
||||
if (bytes > ubufend - ubuf)
|
||||
ret = -EFBIG;
|
||||
|
||||
for (i = 0; i < GRU_NUM_TGH; i++) {
|
||||
tgh = get_tgh(gru->gs_gru_base_vaddr, i);
|
||||
if (gru_user_copy_handle(&ubuf, tgh))
|
||||
goto fail;
|
||||
}
|
||||
return GRU_NUM_TGH * GRU_CACHE_LINE_BYTES;
|
||||
|
||||
fail:
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
static int gru_dump_context(struct gru_state *gru, int ctxnum,
|
||||
void __user *ubuf, void __user *ubufend, char data_opt,
|
||||
char lock_cch)
|
||||
{
|
||||
struct gru_dump_context_header hdr;
|
||||
struct gru_dump_context_header __user *uhdr = ubuf;
|
||||
struct gru_context_configuration_handle *cch;
|
||||
struct gru_thread_state *gts;
|
||||
int try, cch_locked, cbrcnt = 0, dsrcnt = 0, bytes = 0, ret = 0;
|
||||
void *grubase;
|
||||
|
||||
memset(&hdr, 0, sizeof(hdr));
|
||||
grubase = gru->gs_gru_base_vaddr;
|
||||
cch = get_cch(grubase, ctxnum);
|
||||
for (try = 0; try < CCH_LOCK_ATTEMPTS; try++) {
|
||||
cch_locked = trylock_cch_handle(cch);
|
||||
if (cch_locked)
|
||||
break;
|
||||
msleep(1);
|
||||
}
|
||||
|
||||
ubuf += sizeof(hdr);
|
||||
if (gru_user_copy_handle(&ubuf, cch))
|
||||
goto fail;
|
||||
bytes = sizeof(hdr) + GRU_CACHE_LINE_BYTES;
|
||||
|
||||
if (cch_locked || !lock_cch) {
|
||||
gts = gru->gs_gts[ctxnum];
|
||||
if (gts) {
|
||||
hdr.pid = gts->ts_tgid_owner;
|
||||
hdr.vaddr = gts->ts_vma->vm_start;
|
||||
}
|
||||
if (cch->state != CCHSTATE_INACTIVE) {
|
||||
cbrcnt = hweight64(cch->cbr_allocation_map) *
|
||||
GRU_CBR_AU_SIZE;
|
||||
dsrcnt = data_opt ? hweight32(cch->dsr_allocation_map) *
|
||||
GRU_DSR_AU_CL : 0;
|
||||
}
|
||||
bytes += (3 * cbrcnt + dsrcnt) * GRU_CACHE_LINE_BYTES;
|
||||
if (bytes > ubufend - ubuf)
|
||||
ret = -EFBIG;
|
||||
else
|
||||
ret = gru_dump_context_data(grubase, cch, ubuf, ctxnum,
|
||||
dsrcnt);
|
||||
|
||||
}
|
||||
if (cch_locked)
|
||||
unlock_cch_handle(cch);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
hdr.magic = GRU_DUMP_MAGIC;
|
||||
hdr.ctxnum = ctxnum;
|
||||
hdr.cbrcnt = cbrcnt;
|
||||
hdr.dsrcnt = dsrcnt;
|
||||
hdr.cch_locked = cch_locked;
|
||||
if (!ret && copy_to_user((void __user *)uhdr, &hdr, sizeof(hdr)))
|
||||
ret = -EFAULT;
|
||||
|
||||
return ret ? ret : bytes;
|
||||
|
||||
fail:
|
||||
unlock_cch_handle(cch);
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
int gru_dump_chiplet_request(unsigned long arg)
|
||||
{
|
||||
struct gru_state *gru;
|
||||
struct gru_dump_chiplet_state_req req;
|
||||
void __user *ubuf;
|
||||
void __user *ubufend;
|
||||
int ctxnum, ret, cnt = 0;
|
||||
|
||||
if (copy_from_user(&req, (void __user *)arg, sizeof(req)))
|
||||
return -EFAULT;
|
||||
|
||||
/* Currently, only dump by gid is implemented */
|
||||
if (req.gid >= gru_max_gids || req.gid < 0)
|
||||
return -EINVAL;
|
||||
|
||||
gru = GID_TO_GRU(req.gid);
|
||||
ubuf = req.buf;
|
||||
ubufend = req.buf + req.buflen;
|
||||
|
||||
ret = gru_dump_tfm(gru, ubuf, ubufend);
|
||||
if (ret < 0)
|
||||
goto fail;
|
||||
ubuf += ret;
|
||||
|
||||
ret = gru_dump_tgh(gru, ubuf, ubufend);
|
||||
if (ret < 0)
|
||||
goto fail;
|
||||
ubuf += ret;
|
||||
|
||||
for (ctxnum = 0; ctxnum < GRU_NUM_CCH; ctxnum++) {
|
||||
if (req.ctxnum == ctxnum || req.ctxnum < 0) {
|
||||
ret = gru_dump_context(gru, ctxnum, ubuf, ubufend,
|
||||
req.data_opt, req.lock_cch);
|
||||
if (ret < 0)
|
||||
goto fail;
|
||||
ubuf += ret;
|
||||
cnt++;
|
||||
}
|
||||
}
|
||||
|
||||
if (copy_to_user((void __user *)arg, &req, sizeof(req)))
|
||||
return -EFAULT;
|
||||
return cnt;
|
||||
|
||||
fail:
|
||||
return ret;
|
||||
}
|
||||
|
|
@ -47,6 +47,9 @@
|
|||
/* For fetching GRU chiplet status */
|
||||
#define GRU_GET_CHIPLET_STATUS _IOWR(GRU_IOCTL_NUM, 10, void *)
|
||||
|
||||
/* For dumpping GRU chiplet state */
|
||||
#define GRU_DUMP_CHIPLET_STATE _IOWR(GRU_IOCTL_NUM, 11, void *)
|
||||
|
||||
/* For user TLB flushing (primarily for tests) */
|
||||
#define GRU_USER_FLUSH_TLB _IOWR(GRU_IOCTL_NUM, 50, void *)
|
||||
|
||||
|
|
@ -83,6 +86,36 @@ struct gru_flush_tlb_req {
|
|||
size_t len;
|
||||
};
|
||||
|
||||
/*
|
||||
* Structure used to pass TLB flush parameters to the driver
|
||||
*/
|
||||
enum {dcs_pid, dcs_gid};
|
||||
struct gru_dump_chiplet_state_req {
|
||||
unsigned int op;
|
||||
int gid;
|
||||
int ctxnum;
|
||||
char data_opt;
|
||||
char lock_cch;
|
||||
pid_t pid;
|
||||
void *buf;
|
||||
size_t buflen;
|
||||
/* ---- output --- */
|
||||
unsigned int num_contexts;
|
||||
};
|
||||
|
||||
#define GRU_DUMP_MAGIC 0x3474ab6c
|
||||
struct gru_dump_context_header {
|
||||
unsigned int magic;
|
||||
unsigned char gid;
|
||||
unsigned char ctxnum;
|
||||
unsigned char cbrcnt;
|
||||
unsigned char dsrcnt;
|
||||
pid_t pid;
|
||||
unsigned long vaddr;
|
||||
int cch_locked;
|
||||
unsigned long data[0];
|
||||
};
|
||||
|
||||
/*
|
||||
* GRU configuration info (temp - for testing)
|
||||
*/
|
||||
|
|
|
|||
|
|
@ -554,6 +554,12 @@ struct gru_blade_state {
|
|||
|
||||
/* Lock hierarchy checking enabled only in emulator */
|
||||
|
||||
/* 0 = lock failed, 1 = locked */
|
||||
static inline int __trylock_handle(void *h)
|
||||
{
|
||||
return !test_and_set_bit(1, h);
|
||||
}
|
||||
|
||||
static inline void __lock_handle(void *h)
|
||||
{
|
||||
while (test_and_set_bit(1, h))
|
||||
|
|
@ -565,6 +571,11 @@ static inline void __unlock_handle(void *h)
|
|||
clear_bit(1, h);
|
||||
}
|
||||
|
||||
static inline int trylock_cch_handle(struct gru_context_configuration_handle *cch)
|
||||
{
|
||||
return __trylock_handle(cch);
|
||||
}
|
||||
|
||||
static inline void lock_cch_handle(struct gru_context_configuration_handle *cch)
|
||||
{
|
||||
__lock_handle(cch);
|
||||
|
|
@ -606,6 +617,7 @@ extern void gts_drop(struct gru_thread_state *gts);
|
|||
extern void gru_tgh_flush_init(struct gru_state *gru);
|
||||
extern int gru_kservices_init(struct gru_state *gru);
|
||||
extern void gru_kservices_exit(struct gru_state *gru);
|
||||
extern int gru_dump_chiplet_request(unsigned long arg);
|
||||
extern irqreturn_t gru_intr(int irq, void *dev_id);
|
||||
extern int gru_handle_user_call_os(unsigned long address);
|
||||
extern int gru_user_flush_tlb(unsigned long arg);
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче