![Jack Steiner](/assets/img/avatar_default.png)
Do not use alloc_pages_exact_node() to allocate GRU tables. If a blade has no local memory, nid will be -1. Use alloc_pages_node() instead. 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>
458 lines
11 KiB
C
458 lines
11 KiB
C
/*
|
|
* SN Platform GRU Driver
|
|
*
|
|
* FILE OPERATIONS & DRIVER INITIALIZATION
|
|
*
|
|
* This file supports the user system call for file open, close, mmap, etc.
|
|
* This also incudes the driver initialization code.
|
|
*
|
|
* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/io.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/device.h>
|
|
#include <linux/miscdevice.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/uaccess.h>
|
|
#include <asm/uv/uv.h>
|
|
#include "gru.h"
|
|
#include "grulib.h"
|
|
#include "grutables.h"
|
|
|
|
#include <asm/uv/uv_hub.h>
|
|
#include <asm/uv/uv_mmrs.h>
|
|
|
|
struct gru_blade_state *gru_base[GRU_MAX_BLADES] __read_mostly;
|
|
unsigned long gru_start_paddr __read_mostly;
|
|
void *gru_start_vaddr __read_mostly;
|
|
unsigned long gru_end_paddr __read_mostly;
|
|
unsigned int gru_max_gids __read_mostly;
|
|
struct gru_stats_s gru_stats;
|
|
|
|
/* Guaranteed user available resources on each node */
|
|
static int max_user_cbrs, max_user_dsr_bytes;
|
|
|
|
static struct miscdevice gru_miscdev;
|
|
|
|
|
|
/*
|
|
* gru_vma_close
|
|
*
|
|
* Called when unmapping a device mapping. Frees all gru resources
|
|
* and tables belonging to the vma.
|
|
*/
|
|
static void gru_vma_close(struct vm_area_struct *vma)
|
|
{
|
|
struct gru_vma_data *vdata;
|
|
struct gru_thread_state *gts;
|
|
struct list_head *entry, *next;
|
|
|
|
if (!vma->vm_private_data)
|
|
return;
|
|
|
|
vdata = vma->vm_private_data;
|
|
vma->vm_private_data = NULL;
|
|
gru_dbg(grudev, "vma %p, file %p, vdata %p\n", vma, vma->vm_file,
|
|
vdata);
|
|
list_for_each_safe(entry, next, &vdata->vd_head) {
|
|
gts =
|
|
list_entry(entry, struct gru_thread_state, ts_next);
|
|
list_del(>s->ts_next);
|
|
mutex_lock(>s->ts_ctxlock);
|
|
if (gts->ts_gru)
|
|
gru_unload_context(gts, 0);
|
|
mutex_unlock(>s->ts_ctxlock);
|
|
gts_drop(gts);
|
|
}
|
|
kfree(vdata);
|
|
STAT(vdata_free);
|
|
}
|
|
|
|
/*
|
|
* gru_file_mmap
|
|
*
|
|
* Called when mmapping the device. Initializes the vma with a fault handler
|
|
* and private data structure necessary to allocate, track, and free the
|
|
* underlying pages.
|
|
*/
|
|
static int gru_file_mmap(struct file *file, struct vm_area_struct *vma)
|
|
{
|
|
if ((vma->vm_flags & (VM_SHARED | VM_WRITE)) != (VM_SHARED | VM_WRITE))
|
|
return -EPERM;
|
|
|
|
if (vma->vm_start & (GRU_GSEG_PAGESIZE - 1) ||
|
|
vma->vm_end & (GRU_GSEG_PAGESIZE - 1))
|
|
return -EINVAL;
|
|
|
|
vma->vm_flags |=
|
|
(VM_IO | VM_DONTCOPY | VM_LOCKED | VM_DONTEXPAND | VM_PFNMAP |
|
|
VM_RESERVED);
|
|
vma->vm_page_prot = PAGE_SHARED;
|
|
vma->vm_ops = &gru_vm_ops;
|
|
|
|
vma->vm_private_data = gru_alloc_vma_data(vma, 0);
|
|
if (!vma->vm_private_data)
|
|
return -ENOMEM;
|
|
|
|
gru_dbg(grudev, "file %p, vaddr 0x%lx, vma %p, vdata %p\n",
|
|
file, vma->vm_start, vma, vma->vm_private_data);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Create a new GRU context
|
|
*/
|
|
static int gru_create_new_context(unsigned long arg)
|
|
{
|
|
struct gru_create_context_req req;
|
|
struct vm_area_struct *vma;
|
|
struct gru_vma_data *vdata;
|
|
int ret = -EINVAL;
|
|
|
|
|
|
if (copy_from_user(&req, (void __user *)arg, sizeof(req)))
|
|
return -EFAULT;
|
|
|
|
if (req.data_segment_bytes > max_user_dsr_bytes)
|
|
return -EINVAL;
|
|
if (req.control_blocks > max_user_cbrs || !req.maximum_thread_count)
|
|
return -EINVAL;
|
|
|
|
if (!(req.options & GRU_OPT_MISS_MASK))
|
|
req.options |= GRU_OPT_MISS_FMM_INTR;
|
|
|
|
down_write(¤t->mm->mmap_sem);
|
|
vma = gru_find_vma(req.gseg);
|
|
if (vma) {
|
|
vdata = vma->vm_private_data;
|
|
vdata->vd_user_options = req.options;
|
|
vdata->vd_dsr_au_count =
|
|
GRU_DS_BYTES_TO_AU(req.data_segment_bytes);
|
|
vdata->vd_cbr_au_count = GRU_CB_COUNT_TO_AU(req.control_blocks);
|
|
ret = 0;
|
|
}
|
|
up_write(¤t->mm->mmap_sem);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Get GRU configuration info (temp - for emulator testing)
|
|
*/
|
|
static long gru_get_config_info(unsigned long arg)
|
|
{
|
|
struct gru_config_info info;
|
|
int nodesperblade;
|
|
|
|
if (num_online_nodes() > 1 &&
|
|
(uv_node_to_blade_id(1) == uv_node_to_blade_id(0)))
|
|
nodesperblade = 2;
|
|
else
|
|
nodesperblade = 1;
|
|
info.cpus = num_online_cpus();
|
|
info.nodes = num_online_nodes();
|
|
info.blades = info.nodes / nodesperblade;
|
|
info.chiplets = GRU_CHIPLETS_PER_BLADE * info.blades;
|
|
|
|
if (copy_to_user((void __user *)arg, &info, sizeof(info)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* gru_file_unlocked_ioctl
|
|
*
|
|
* Called to update file attributes via IOCTL calls.
|
|
*/
|
|
static long gru_file_unlocked_ioctl(struct file *file, unsigned int req,
|
|
unsigned long arg)
|
|
{
|
|
int err = -EBADRQC;
|
|
|
|
gru_dbg(grudev, "file %p\n", file);
|
|
|
|
switch (req) {
|
|
case GRU_CREATE_CONTEXT:
|
|
err = gru_create_new_context(arg);
|
|
break;
|
|
case GRU_SET_CONTEXT_OPTION:
|
|
err = gru_set_context_option(arg);
|
|
break;
|
|
case GRU_USER_GET_EXCEPTION_DETAIL:
|
|
err = gru_get_exception_detail(arg);
|
|
break;
|
|
case GRU_USER_UNLOAD_CONTEXT:
|
|
err = gru_user_unload_context(arg);
|
|
break;
|
|
case GRU_USER_FLUSH_TLB:
|
|
err = gru_user_flush_tlb(arg);
|
|
break;
|
|
case GRU_USER_CALL_OS:
|
|
err = gru_handle_user_call_os(arg);
|
|
break;
|
|
case GRU_GET_GSEG_STATISTICS:
|
|
err = gru_get_gseg_statistics(arg);
|
|
break;
|
|
case GRU_KTEST:
|
|
err = gru_ktest(arg);
|
|
break;
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Called at init time to build tables for all GRUs that are present in the
|
|
* system.
|
|
*/
|
|
static void gru_init_chiplet(struct gru_state *gru, unsigned long paddr,
|
|
void *vaddr, int nid, int bid, int grunum)
|
|
{
|
|
spin_lock_init(&gru->gs_lock);
|
|
spin_lock_init(&gru->gs_asid_lock);
|
|
gru->gs_gru_base_paddr = paddr;
|
|
gru->gs_gru_base_vaddr = vaddr;
|
|
gru->gs_gid = bid * GRU_CHIPLETS_PER_BLADE + grunum;
|
|
gru->gs_blade = gru_base[bid];
|
|
gru->gs_blade_id = bid;
|
|
gru->gs_cbr_map = (GRU_CBR_AU == 64) ? ~0 : (1UL << GRU_CBR_AU) - 1;
|
|
gru->gs_dsr_map = (1UL << GRU_DSR_AU) - 1;
|
|
gru->gs_asid_limit = MAX_ASID;
|
|
gru_tgh_flush_init(gru);
|
|
if (gru->gs_gid >= gru_max_gids)
|
|
gru_max_gids = gru->gs_gid + 1;
|
|
gru_dbg(grudev, "bid %d, nid %d, gid %d, vaddr %p (0x%lx)\n",
|
|
bid, nid, gru->gs_gid, gru->gs_gru_base_vaddr,
|
|
gru->gs_gru_base_paddr);
|
|
}
|
|
|
|
static int gru_init_tables(unsigned long gru_base_paddr, void *gru_base_vaddr)
|
|
{
|
|
int pnode, nid, bid, chip;
|
|
int cbrs, dsrbytes, n;
|
|
int order = get_order(sizeof(struct gru_blade_state));
|
|
struct page *page;
|
|
struct gru_state *gru;
|
|
unsigned long paddr;
|
|
void *vaddr;
|
|
|
|
max_user_cbrs = GRU_NUM_CB;
|
|
max_user_dsr_bytes = GRU_NUM_DSR_BYTES;
|
|
for_each_possible_blade(bid) {
|
|
pnode = uv_blade_to_pnode(bid);
|
|
nid = uv_blade_to_memory_nid(bid);/* -1 if no memory on blade */
|
|
page = alloc_pages_node(nid, GFP_KERNEL, order);
|
|
if (!page)
|
|
goto fail;
|
|
gru_base[bid] = page_address(page);
|
|
memset(gru_base[bid], 0, sizeof(struct gru_blade_state));
|
|
gru_base[bid]->bs_lru_gru = &gru_base[bid]->bs_grus[0];
|
|
spin_lock_init(&gru_base[bid]->bs_lock);
|
|
init_rwsem(&gru_base[bid]->bs_kgts_sema);
|
|
|
|
dsrbytes = 0;
|
|
cbrs = 0;
|
|
for (gru = gru_base[bid]->bs_grus, chip = 0;
|
|
chip < GRU_CHIPLETS_PER_BLADE;
|
|
chip++, gru++) {
|
|
paddr = gru_chiplet_paddr(gru_base_paddr, pnode, chip);
|
|
vaddr = gru_chiplet_vaddr(gru_base_vaddr, pnode, chip);
|
|
gru_init_chiplet(gru, paddr, vaddr, nid, bid, chip);
|
|
n = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE;
|
|
cbrs = max(cbrs, n);
|
|
n = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES;
|
|
dsrbytes = max(dsrbytes, n);
|
|
}
|
|
max_user_cbrs = min(max_user_cbrs, cbrs);
|
|
max_user_dsr_bytes = min(max_user_dsr_bytes, dsrbytes);
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
for (bid--; bid >= 0; bid--)
|
|
free_pages((unsigned long)gru_base[bid], order);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
#ifdef CONFIG_IA64
|
|
|
|
static int get_base_irq(void)
|
|
{
|
|
return IRQ_GRU;
|
|
}
|
|
|
|
#elif defined CONFIG_X86_64
|
|
|
|
static void noop(unsigned int irq)
|
|
{
|
|
}
|
|
|
|
static struct irq_chip gru_chip = {
|
|
.name = "gru",
|
|
.mask = noop,
|
|
.unmask = noop,
|
|
.ack = noop,
|
|
};
|
|
|
|
static int get_base_irq(void)
|
|
{
|
|
set_irq_chip(IRQ_GRU, &gru_chip);
|
|
set_irq_chip(IRQ_GRU + 1, &gru_chip);
|
|
return IRQ_GRU;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* gru_init
|
|
*
|
|
* Called at boot or module load time to initialize the GRUs.
|
|
*/
|
|
static int __init gru_init(void)
|
|
{
|
|
int ret, irq, chip;
|
|
char id[10];
|
|
|
|
if (!is_uv_system())
|
|
return 0;
|
|
|
|
#if defined CONFIG_IA64
|
|
gru_start_paddr = 0xd000000000UL; /* ZZZZZZZZZZZZZZZZZZZ fixme */
|
|
#else
|
|
gru_start_paddr = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR) &
|
|
0x7fffffffffffUL;
|
|
#endif
|
|
gru_start_vaddr = __va(gru_start_paddr);
|
|
gru_end_paddr = gru_start_paddr + GRU_MAX_BLADES * GRU_SIZE;
|
|
printk(KERN_INFO "GRU space: 0x%lx - 0x%lx\n",
|
|
gru_start_paddr, gru_end_paddr);
|
|
irq = get_base_irq();
|
|
for (chip = 0; chip < GRU_CHIPLETS_PER_BLADE; chip++) {
|
|
ret = request_irq(irq + chip, gru_intr, 0, id, NULL);
|
|
/* TODO: fix irq handling on x86. For now ignore failure because
|
|
* interrupts are not required & not yet fully supported */
|
|
if (ret) {
|
|
printk(KERN_WARNING
|
|
"!!!WARNING: GRU ignoring request failure!!!\n");
|
|
ret = 0;
|
|
}
|
|
if (ret) {
|
|
printk(KERN_ERR "%s: request_irq failed\n",
|
|
GRU_DRIVER_ID_STR);
|
|
goto exit1;
|
|
}
|
|
}
|
|
|
|
ret = misc_register(&gru_miscdev);
|
|
if (ret) {
|
|
printk(KERN_ERR "%s: misc_register failed\n",
|
|
GRU_DRIVER_ID_STR);
|
|
goto exit1;
|
|
}
|
|
|
|
ret = gru_proc_init();
|
|
if (ret) {
|
|
printk(KERN_ERR "%s: proc init failed\n", GRU_DRIVER_ID_STR);
|
|
goto exit2;
|
|
}
|
|
|
|
ret = gru_init_tables(gru_start_paddr, gru_start_vaddr);
|
|
if (ret) {
|
|
printk(KERN_ERR "%s: init tables failed\n", GRU_DRIVER_ID_STR);
|
|
goto exit3;
|
|
}
|
|
gru_kservices_init();
|
|
|
|
printk(KERN_INFO "%s: v%s\n", GRU_DRIVER_ID_STR,
|
|
GRU_DRIVER_VERSION_STR);
|
|
return 0;
|
|
|
|
exit3:
|
|
gru_proc_exit();
|
|
exit2:
|
|
misc_deregister(&gru_miscdev);
|
|
exit1:
|
|
for (--chip; chip >= 0; chip--)
|
|
free_irq(irq + chip, NULL);
|
|
return ret;
|
|
|
|
}
|
|
|
|
static void __exit gru_exit(void)
|
|
{
|
|
int i, bid;
|
|
int order = get_order(sizeof(struct gru_state) *
|
|
GRU_CHIPLETS_PER_BLADE);
|
|
|
|
if (!is_uv_system())
|
|
return;
|
|
|
|
for (i = 0; i < GRU_CHIPLETS_PER_BLADE; i++)
|
|
free_irq(IRQ_GRU + i, NULL);
|
|
gru_kservices_exit();
|
|
for (bid = 0; bid < GRU_MAX_BLADES; bid++)
|
|
free_pages((unsigned long)gru_base[bid], order);
|
|
|
|
misc_deregister(&gru_miscdev);
|
|
gru_proc_exit();
|
|
}
|
|
|
|
static const struct file_operations gru_fops = {
|
|
.owner = THIS_MODULE,
|
|
.unlocked_ioctl = gru_file_unlocked_ioctl,
|
|
.mmap = gru_file_mmap,
|
|
};
|
|
|
|
static struct miscdevice gru_miscdev = {
|
|
.minor = MISC_DYNAMIC_MINOR,
|
|
.name = "gru",
|
|
.fops = &gru_fops,
|
|
};
|
|
|
|
const struct vm_operations_struct gru_vm_ops = {
|
|
.close = gru_vma_close,
|
|
.fault = gru_fault,
|
|
};
|
|
|
|
#ifndef MODULE
|
|
fs_initcall(gru_init);
|
|
#else
|
|
module_init(gru_init);
|
|
#endif
|
|
module_exit(gru_exit);
|
|
|
|
module_param(gru_options, ulong, 0644);
|
|
MODULE_PARM_DESC(gru_options, "Various debug options");
|
|
|
|
MODULE_AUTHOR("Silicon Graphics, Inc.");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION(GRU_DRIVER_ID_STR GRU_DRIVER_VERSION_STR);
|
|
MODULE_VERSION(GRU_DRIVER_VERSION_STR);
|
|
|