[mirror_ubuntu-zesty-kernel.git] / drivers / misc / sgi-gru / grufile.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(&gts->ts_next);
		mutex_lock(&gts->ts_ctxlock);
		if (gts->ts_gru)
			gru_unload_context(gts, 0);
		mutex_unlock(&gts->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(&current->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(&current->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_online_node(nid) {
		bid = uv_node_to_blade_id(nid);
		pnode = uv_node_to_pnode(nid);
		if (bid < 0 || gru_base[bid])
			continue;
		page = alloc_pages_exact_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 (nid--; nid >= 0; nid--)
		free_pages((unsigned long)gru_base[nid], 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);
Commit	Line	Data
78cf1de4 JS	1	/*
	2	* SN Platform GRU Driver
	3	*
	4	* FILE OPERATIONS & DRIVER INITIALIZATION
	5	*
	6	* This file supports the user system call for file open, close, mmap, etc.
	7	* This also incudes the driver initialization code.
	8	*
	9	* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2 of the License, or
	14	* (at your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	* GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program; if not, write to the Free Software
	23	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	24	*/
	25
	26	#include <linux/module.h>
	27	#include <linux/kernel.h>
	28	#include <linux/errno.h>
	29	#include <linux/slab.h>
	30	#include <linux/mm.h>
	31	#include <linux/io.h>
78cf1de4 JS	32	#include <linux/spinlock.h>
	33	#include <linux/device.h>
	34	#include <linux/miscdevice.h>
	35	#include <linux/interrupt.h>
	36	#include <linux/proc_fs.h>
	37	#include <linux/uaccess.h>
1c004004	38	#include <asm/uv/uv.h>
78cf1de4 JS	39	#include "gru.h"
	40	#include "grulib.h"
	41	#include "grutables.h"
	42
78cf1de4 JS	43	#include <asm/uv/uv_hub.h>
	44	#include <asm/uv/uv_mmrs.h>
	45
	46	struct gru_blade_state *gru_base[GRU_MAX_BLADES] __read_mostly;
fe5bb6b0	47	unsigned long gru_start_paddr __read_mostly;
1a2c09e3	48	void *gru_start_vaddr __read_mostly;
fe5bb6b0	49	unsigned long gru_end_paddr __read_mostly;
e1c3219d	50	unsigned int gru_max_gids __read_mostly;
78cf1de4 JS	51	struct gru_stats_s gru_stats;
	52
	53	/* Guaranteed user available resources on each node */
	54	static int max_user_cbrs, max_user_dsr_bytes;
	55
78cf1de4 JS	56	static struct miscdevice gru_miscdev;
	57
	58
	59	/*
	60	* gru_vma_close
	61	*
	62	* Called when unmapping a device mapping. Frees all gru resources
	63	* and tables belonging to the vma.
	64	*/
	65	static void gru_vma_close(struct vm_area_struct *vma)
	66	{
	67	struct gru_vma_data *vdata;
	68	struct gru_thread_state *gts;
	69	struct list_head entry, next;
	70
	71	if (!vma->vm_private_data)
	72	return;
	73
	74	vdata = vma->vm_private_data;
	75	vma->vm_private_data = NULL;
	76	gru_dbg(grudev, "vma %p, file %p, vdata %p\n", vma, vma->vm_file,
	77	vdata);
	78	list_for_each_safe(entry, next, &vdata->vd_head) {
	79	gts =
	80	list_entry(entry, struct gru_thread_state, ts_next);
	81	list_del(&gts->ts_next);
	82	mutex_lock(&gts->ts_ctxlock);
	83	if (gts->ts_gru)
	84	gru_unload_context(gts, 0);
	85	mutex_unlock(&gts->ts_ctxlock);
	86	gts_drop(gts);
	87	}
	88	kfree(vdata);
	89	STAT(vdata_free);
	90	}
	91
	92	/*
	93	* gru_file_mmap
	94	*
af901ca1	95	* Called when mmapping the device. Initializes the vma with a fault handler
78cf1de4 JS	96	* and private data structure necessary to allocate, track, and free the
	97	* underlying pages.
	98	*/
	99	static int gru_file_mmap(struct file file, struct vm_area_struct vma)
	100	{
	101	if ((vma->vm_flags & (VM_SHARED \| VM_WRITE)) != (VM_SHARED \| VM_WRITE))
	102	return -EPERM;
	103
9ca8e40c	104	if (vma->vm_start & (GRU_GSEG_PAGESIZE - 1) \|\|
fe5bb6b0	105	vma->vm_end & (GRU_GSEG_PAGESIZE - 1))
9ca8e40c JS	106	return -EINVAL;
9ca8e40c JS	107
78cf1de4 JS	108	vma->vm_flags \|=
	109	(VM_IO \| VM_DONTCOPY \| VM_LOCKED \| VM_DONTEXPAND \| VM_PFNMAP \|
	110	VM_RESERVED);
	111	vma->vm_page_prot = PAGE_SHARED;
	112	vma->vm_ops = &gru_vm_ops;
	113
	114	vma->vm_private_data = gru_alloc_vma_data(vma, 0);
	115	if (!vma->vm_private_data)
	116	return -ENOMEM;
	117
	118	gru_dbg(grudev, "file %p, vaddr 0x%lx, vma %p, vdata %p\n",
	119	file, vma->vm_start, vma, vma->vm_private_data);
	120	return 0;
	121	}
	122
	123	/*
	124	* Create a new GRU context
	125	*/
	126	static int gru_create_new_context(unsigned long arg)
	127	{
	128	struct gru_create_context_req req;
	129	struct vm_area_struct *vma;
	130	struct gru_vma_data *vdata;
	131	int ret = -EINVAL;
	132
	133
	134	if (copy_from_user(&req, (void __user *)arg, sizeof(req)))
	135	return -EFAULT;
	136
3eac2e95	137	if (req.data_segment_bytes > max_user_dsr_bytes)
78cf1de4	138	return -EINVAL;
3eac2e95	139	if (req.control_blocks > max_user_cbrs \|\| !req.maximum_thread_count)
78cf1de4 JS	140	return -EINVAL;
	141
	142	if (!(req.options & GRU_OPT_MISS_MASK))
	143	req.options \|= GRU_OPT_MISS_FMM_INTR;
	144
	145	down_write(&current->mm->mmap_sem);
	146	vma = gru_find_vma(req.gseg);
	147	if (vma) {
	148	vdata = vma->vm_private_data;
	149	vdata->vd_user_options = req.options;
	150	vdata->vd_dsr_au_count =
	151	GRU_DS_BYTES_TO_AU(req.data_segment_bytes);
	152	vdata->vd_cbr_au_count = GRU_CB_COUNT_TO_AU(req.control_blocks);
	153	ret = 0;
	154	}
	155	up_write(&current->mm->mmap_sem);
	156
	157	return ret;
	158	}
	159
	160	/*
	161	* Get GRU configuration info (temp - for emulator testing)
	162	*/
	163	static long gru_get_config_info(unsigned long arg)
	164	{
	165	struct gru_config_info info;
	166	int nodesperblade;
	167
	168	if (num_online_nodes() > 1 &&
	169	(uv_node_to_blade_id(1) == uv_node_to_blade_id(0)))
	170	nodesperblade = 2;
	171	else
	172	nodesperblade = 1;
	173	info.cpus = num_online_cpus();
	174	info.nodes = num_online_nodes();
	175	info.blades = info.nodes / nodesperblade;
	176	info.chiplets = GRU_CHIPLETS_PER_BLADE * info.blades;
	177
	178	if (copy_to_user((void __user *)arg, &info, sizeof(info)))
	179	return -EFAULT;
	180	return 0;
	181	}
	182
78cf1de4 JS	183	/*
	184	* gru_file_unlocked_ioctl
	185	*
	186	* Called to update file attributes via IOCTL calls.
	187	*/
	188	static long gru_file_unlocked_ioctl(struct file *file, unsigned int req,
	189	unsigned long arg)
	190	{
	191	int err = -EBADRQC;
	192
	193	gru_dbg(grudev, "file %p\n", file);
	194
	195	switch (req) {
	196	case GRU_CREATE_CONTEXT:
	197	err = gru_create_new_context(arg);
	198	break;
92b39388 JS	199	case GRU_SET_CONTEXT_OPTION:
92b39388 JS	200	err = gru_set_context_option(arg);
78cf1de4 JS	201	break;
	202	case GRU_USER_GET_EXCEPTION_DETAIL:
	203	err = gru_get_exception_detail(arg);
	204	break;
	205	case GRU_USER_UNLOAD_CONTEXT:
	206	err = gru_user_unload_context(arg);
	207	break;
78cf1de4 JS	208	case GRU_USER_FLUSH_TLB:
	209	err = gru_user_flush_tlb(arg);
	210	break;
	211	case GRU_USER_CALL_OS:
	212	err = gru_handle_user_call_os(arg);
	213	break;
7e796a72 JS	214	case GRU_GET_GSEG_STATISTICS:
	215	err = gru_get_gseg_statistics(arg);
	216	break;
eb5bd5e5 JS	217	case GRU_KTEST:
	218	err = gru_ktest(arg);
	219	break;
78cf1de4 JS	220	case GRU_GET_CONFIG_INFO:
	221	err = gru_get_config_info(arg);
	222	break;
9cc9b056 JS	223	case GRU_DUMP_CHIPLET_STATE:
	224	err = gru_dump_chiplet_request(arg);
	225	break;
78cf1de4 JS	226	}
	227	return err;
	228	}
	229
	230	/*
	231	* Called at init time to build tables for all GRUs that are present in the
	232	* system.
	233	*/
	234	static void gru_init_chiplet(struct gru_state *gru, unsigned long paddr,
	235	void *vaddr, int nid, int bid, int grunum)
	236	{
	237	spin_lock_init(&gru->gs_lock);
	238	spin_lock_init(&gru->gs_asid_lock);
	239	gru->gs_gru_base_paddr = paddr;
	240	gru->gs_gru_base_vaddr = vaddr;
	241	gru->gs_gid = bid * GRU_CHIPLETS_PER_BLADE + grunum;
	242	gru->gs_blade = gru_base[bid];
	243	gru->gs_blade_id = bid;
	244	gru->gs_cbr_map = (GRU_CBR_AU == 64) ? ~0 : (1UL << GRU_CBR_AU) - 1;
	245	gru->gs_dsr_map = (1UL << GRU_DSR_AU) - 1;
87419412	246	gru->gs_asid_limit = MAX_ASID;
78cf1de4	247	gru_tgh_flush_init(gru);
e1c3219d JS	248	if (gru->gs_gid >= gru_max_gids)
e1c3219d JS	249	gru_max_gids = gru->gs_gid + 1;
43884604	250	gru_dbg(grudev, "bid %d, nid %d, gid %d, vaddr %p (0x%lx)\n",
78cf1de4 JS	251	bid, nid, gru->gs_gid, gru->gs_gru_base_vaddr,
78cf1de4 JS	252	gru->gs_gru_base_paddr);
78cf1de4 JS	253	}
	254
	255	static int gru_init_tables(unsigned long gru_base_paddr, void *gru_base_vaddr)
	256	{
	257	int pnode, nid, bid, chip;
	258	int cbrs, dsrbytes, n;
	259	int order = get_order(sizeof(struct gru_blade_state));
	260	struct page *page;
	261	struct gru_state *gru;
	262	unsigned long paddr;
	263	void *vaddr;
	264
	265	max_user_cbrs = GRU_NUM_CB;
	266	max_user_dsr_bytes = GRU_NUM_DSR_BYTES;
	267	for_each_online_node(nid) {
	268	bid = uv_node_to_blade_id(nid);
	269	pnode = uv_node_to_pnode(nid);
fe5bb6b0	270	if (bid < 0 \|\| gru_base[bid])
78cf1de4	271	continue;
6484eb3e	272	page = alloc_pages_exact_node(nid, GFP_KERNEL, order);
78cf1de4 JS	273	if (!page)
	274	goto fail;
	275	gru_base[bid] = page_address(page);
	276	memset(gru_base[bid], 0, sizeof(struct gru_blade_state));
	277	gru_base[bid]->bs_lru_gru = &gru_base[bid]->bs_grus[0];
	278	spin_lock_init(&gru_base[bid]->bs_lock);
d5826dd6	279	init_rwsem(&gru_base[bid]->bs_kgts_sema);
78cf1de4 JS	280
	281	dsrbytes = 0;
	282	cbrs = 0;
	283	for (gru = gru_base[bid]->bs_grus, chip = 0;
fe5bb6b0	284	chip < GRU_CHIPLETS_PER_BLADE;
78cf1de4 JS	285	chip++, gru++) {
	286	paddr = gru_chiplet_paddr(gru_base_paddr, pnode, chip);
	287	vaddr = gru_chiplet_vaddr(gru_base_vaddr, pnode, chip);
fe5bb6b0	288	gru_init_chiplet(gru, paddr, vaddr, nid, bid, chip);
78cf1de4 JS	289	n = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE;
	290	cbrs = max(cbrs, n);
	291	n = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES;
	292	dsrbytes = max(dsrbytes, n);
	293	}
	294	max_user_cbrs = min(max_user_cbrs, cbrs);
	295	max_user_dsr_bytes = min(max_user_dsr_bytes, dsrbytes);
	296	}
	297
	298	return 0;
	299
	300	fail:
	301	for (nid--; nid >= 0; nid--)
	302	free_pages((unsigned long)gru_base[nid], order);
	303	return -ENOMEM;
	304	}
	305
	306	#ifdef CONFIG_IA64
	307
	308	static int get_base_irq(void)
	309	{
	310	return IRQ_GRU;
	311	}
	312
	313	#elif defined CONFIG_X86_64
	314
	315	static void noop(unsigned int irq)
	316	{
	317	}
	318
	319	static struct irq_chip gru_chip = {
	320	.name = "gru",
	321	.mask = noop,
	322	.unmask = noop,
	323	.ack = noop,
	324	};
	325
	326	static int get_base_irq(void)
	327	{
	328	set_irq_chip(IRQ_GRU, &gru_chip);
	329	set_irq_chip(IRQ_GRU + 1, &gru_chip);
	330	return IRQ_GRU;
	331	}
	332	#endif
	333
	334	/*
	335	* gru_init
	336	*
	337	* Called at boot or module load time to initialize the GRUs.
	338	*/
	339	static int __init gru_init(void)
	340	{
	341	int ret, irq, chip;
	342	char id[10];
78cf1de4	343
1c004004	344	if (!is_uv_system())
e873cff0	345	return 0;
78cf1de4 JS	346
	347	#if defined CONFIG_IA64
	348	gru_start_paddr = 0xd000000000UL; /* ZZZZZZZZZZZZZZZZZZZ fixme */
	349	#else
	350	gru_start_paddr = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR) &
	351	0x7fffffffffffUL;
78cf1de4 JS	352	#endif
78cf1de4 JS	353	gru_start_vaddr = __va(gru_start_paddr);
fe5bb6b0	354	gru_end_paddr = gru_start_paddr + GRU_MAX_BLADES * GRU_SIZE;
78cf1de4 JS	355	printk(KERN_INFO "GRU space: 0x%lx - 0x%lx\n",
	356	gru_start_paddr, gru_end_paddr);
	357	irq = get_base_irq();
	358	for (chip = 0; chip < GRU_CHIPLETS_PER_BLADE; chip++) {
	359	ret = request_irq(irq + chip, gru_intr, 0, id, NULL);
fe5bb6b0	360	/* TODO: fix irq handling on x86. For now ignore failure because
923f7f69 JS	361	* interrupts are not required & not yet fully supported */
923f7f69 JS	362	if (ret) {
fe5bb6b0 JS	363	printk(KERN_WARNING
fe5bb6b0 JS	364	"!!!WARNING: GRU ignoring request failure!!!\n");
923f7f69 JS	365	ret = 0;
923f7f69 JS	366	}
78cf1de4 JS	367	if (ret) {
	368	printk(KERN_ERR "%s: request_irq failed\n",
	369	GRU_DRIVER_ID_STR);
	370	goto exit1;
	371	}
	372	}
	373
	374	ret = misc_register(&gru_miscdev);
	375	if (ret) {
	376	printk(KERN_ERR "%s: misc_register failed\n",
	377	GRU_DRIVER_ID_STR);
	378	goto exit1;
	379	}
	380
	381	ret = gru_proc_init();
	382	if (ret) {
	383	printk(KERN_ERR "%s: proc init failed\n", GRU_DRIVER_ID_STR);
	384	goto exit2;
	385	}
	386
	387	ret = gru_init_tables(gru_start_paddr, gru_start_vaddr);
	388	if (ret) {
	389	printk(KERN_ERR "%s: init tables failed\n", GRU_DRIVER_ID_STR);
	390	goto exit3;
	391	}
d5826dd6	392	gru_kservices_init();
78cf1de4 JS	393
	394	printk(KERN_INFO "%s: v%s\n", GRU_DRIVER_ID_STR,
	395	GRU_DRIVER_VERSION_STR);
	396	return 0;
	397
	398	exit3:
	399	gru_proc_exit();
	400	exit2:
	401	misc_deregister(&gru_miscdev);
	402	exit1:
	403	for (--chip; chip >= 0; chip--)
	404	free_irq(irq + chip, NULL);
	405	return ret;
	406
	407	}
	408
	409	static void __exit gru_exit(void)
	410	{
d5826dd6	411	int i, bid;
78cf1de4 JS	412	int order = get_order(sizeof(struct gru_state) *
	413	GRU_CHIPLETS_PER_BLADE);
	414
1c004004	415	if (!is_uv_system())
8275d102 RH	416	return;
8275d102 RH	417
78cf1de4 JS	418	for (i = 0; i < GRU_CHIPLETS_PER_BLADE; i++)
78cf1de4 JS	419	free_irq(IRQ_GRU + i, NULL);
d5826dd6	420	gru_kservices_exit();
78cf1de4 JS	421	for (bid = 0; bid < GRU_MAX_BLADES; bid++)
	422	free_pages((unsigned long)gru_base[bid], order);
	423
	424	misc_deregister(&gru_miscdev);
	425	gru_proc_exit();
	426	}
	427
828c0950	428	static const struct file_operations gru_fops = {
78cf1de4 JS	429	.owner = THIS_MODULE,
	430	.unlocked_ioctl = gru_file_unlocked_ioctl,
	431	.mmap = gru_file_mmap,
	432	};
	433
	434	static struct miscdevice gru_miscdev = {
	435	.minor = MISC_DYNAMIC_MINOR,
	436	.name = "gru",
	437	.fops = &gru_fops,
	438	};
	439
f0f37e2f	440	const struct vm_operations_struct gru_vm_ops = {
78cf1de4 JS	441	.close = gru_vma_close,
	442	.fault = gru_fault,
	443	};
	444
fe5bb6b0	445	#ifndef MODULE
026bde12	446	fs_initcall(gru_init);
fe5bb6b0 JS	447	#else
	448	module_init(gru_init);
	449	#endif
78cf1de4 JS	450	module_exit(gru_exit);
78cf1de4 JS	451
9ca8e40c JS	452	module_param(gru_options, ulong, 0644);
9ca8e40c JS	453	MODULE_PARM_DESC(gru_options, "Various debug options");
78cf1de4 JS	454
	455	MODULE_AUTHOR("Silicon Graphics, Inc.");
	456	MODULE_LICENSE("GPL");
	457	MODULE_DESCRIPTION(GRU_DRIVER_ID_STR GRU_DRIVER_VERSION_STR);
	458	MODULE_VERSION(GRU_DRIVER_VERSION_STR);
	459