[net-next-2.6.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/smp_lock.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;
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 file_operations gru_fops;
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 mmaping 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 == 0 ||
				req.data_segment_bytes > max_user_dsr_bytes)
		return -EINVAL;
	if (!req.control_blocks || !req.maximum_thread_count ||
				req.control_blocks > max_user_cbrs)
		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;
}

/*
 * Get GRU chiplet status
 */
static long gru_get_chiplet_status(unsigned long arg)
{
	struct gru_state *gru;
	struct gru_chiplet_info info;

	if (copy_from_user(&info, (void __user *)arg, sizeof(info)))
		return -EFAULT;

	if (info.node == -1)
		info.node = numa_node_id();
	if (info.node >= num_possible_nodes() ||
			info.chiplet >= GRU_CHIPLETS_PER_HUB ||
			info.node < 0 || info.chiplet < 0)
		return -EINVAL;

	info.blade = uv_node_to_blade_id(info.node);
	gru = get_gru(info.blade, info.chiplet);

	info.total_dsr_bytes = GRU_NUM_DSR_BYTES;
	info.total_cbr = GRU_NUM_CB;
	info.total_user_dsr_bytes = GRU_NUM_DSR_BYTES -
		gru->gs_reserved_dsr_bytes;
	info.total_user_cbr = GRU_NUM_CB - gru->gs_reserved_cbrs;
	info.free_user_dsr_bytes = hweight64(gru->gs_dsr_map) *
			GRU_DSR_AU_BYTES;
	info.free_user_cbr = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE;

	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_TASK_SLICE:
		err = gru_set_task_slice(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_GET_CHIPLET_STATUS:
		err = gru_get_chiplet_status(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_CONFIG_INFO:
		err = gru_get_config_info(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);
	gru_kservices_init(gru);
}

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_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);

		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];
	void *gru_start_vaddr;

	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;
	}

	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, gid;
	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);

	foreach_gid(gid)
		gru_kservices_exit(GID_TO_GRU(gid));

	for (bid = 0; bid < GRU_MAX_BLADES; bid++)
		free_pages((unsigned long)gru_base[bid], order);

	misc_deregister(&gru_miscdev);
	gru_proc_exit();
}

static 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,
};

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>
	32	#include <linux/smp_lock.h>
	33	#include <linux/spinlock.h>
	34	#include <linux/device.h>
	35	#include <linux/miscdevice.h>
	36	#include <linux/interrupt.h>
	37	#include <linux/proc_fs.h>
	38	#include <linux/uaccess.h>
1c004004	39	#include <asm/uv/uv.h>
78cf1de4 JS	40	#include "gru.h"
	41	#include "grulib.h"
	42	#include "grutables.h"
	43
78cf1de4 JS	44	#include <asm/uv/uv_hub.h>
	45	#include <asm/uv/uv_mmrs.h>
	46
	47	struct gru_blade_state *gru_base[GRU_MAX_BLADES] __read_mostly;
fe5bb6b0 JS	48	unsigned long gru_start_paddr __read_mostly;
fe5bb6b0 JS	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
	56	static struct file_operations gru_fops;
	57	static struct miscdevice gru_miscdev;
	58
	59
	60	/*
	61	* gru_vma_close
	62	*
	63	* Called when unmapping a device mapping. Frees all gru resources
	64	* and tables belonging to the vma.
	65	*/
	66	static void gru_vma_close(struct vm_area_struct *vma)
	67	{
	68	struct gru_vma_data *vdata;
	69	struct gru_thread_state *gts;
	70	struct list_head entry, next;
	71
	72	if (!vma->vm_private_data)
	73	return;
	74
	75	vdata = vma->vm_private_data;
	76	vma->vm_private_data = NULL;
	77	gru_dbg(grudev, "vma %p, file %p, vdata %p\n", vma, vma->vm_file,
	78	vdata);
	79	list_for_each_safe(entry, next, &vdata->vd_head) {
	80	gts =
	81	list_entry(entry, struct gru_thread_state, ts_next);
	82	list_del(&gts->ts_next);
	83	mutex_lock(&gts->ts_ctxlock);
	84	if (gts->ts_gru)
	85	gru_unload_context(gts, 0);
	86	mutex_unlock(&gts->ts_ctxlock);
	87	gts_drop(gts);
	88	}
	89	kfree(vdata);
	90	STAT(vdata_free);
	91	}
	92
	93	/*
	94	* gru_file_mmap
	95	*
	96	* Called when mmaping the device. Initializes the vma with a fault handler
	97	* and private data structure necessary to allocate, track, and free the
	98	* underlying pages.
	99	*/
	100	static int gru_file_mmap(struct file file, struct vm_area_struct vma)
	101	{
	102	if ((vma->vm_flags & (VM_SHARED \| VM_WRITE)) != (VM_SHARED \| VM_WRITE))
	103	return -EPERM;
	104
9ca8e40c	105	if (vma->vm_start & (GRU_GSEG_PAGESIZE - 1) \|\|
fe5bb6b0	106	vma->vm_end & (GRU_GSEG_PAGESIZE - 1))
9ca8e40c JS	107	return -EINVAL;
9ca8e40c JS	108
78cf1de4 JS	109	vma->vm_flags \|=
	110	(VM_IO \| VM_DONTCOPY \| VM_LOCKED \| VM_DONTEXPAND \| VM_PFNMAP \|
	111	VM_RESERVED);
	112	vma->vm_page_prot = PAGE_SHARED;
	113	vma->vm_ops = &gru_vm_ops;
	114
	115	vma->vm_private_data = gru_alloc_vma_data(vma, 0);
	116	if (!vma->vm_private_data)
	117	return -ENOMEM;
	118
	119	gru_dbg(grudev, "file %p, vaddr 0x%lx, vma %p, vdata %p\n",
	120	file, vma->vm_start, vma, vma->vm_private_data);
	121	return 0;
	122	}
	123
	124	/*
	125	* Create a new GRU context
	126	*/
	127	static int gru_create_new_context(unsigned long arg)
	128	{
	129	struct gru_create_context_req req;
	130	struct vm_area_struct *vma;
	131	struct gru_vma_data *vdata;
	132	int ret = -EINVAL;
	133
	134
	135	if (copy_from_user(&req, (void __user *)arg, sizeof(req)))
	136	return -EFAULT;
	137
	138	if (req.data_segment_bytes == 0 \|\|
	139	req.data_segment_bytes > max_user_dsr_bytes)
	140	return -EINVAL;
	141	if (!req.control_blocks \|\| !req.maximum_thread_count \|\|
	142	req.control_blocks > max_user_cbrs)
	143	return -EINVAL;
	144
	145	if (!(req.options & GRU_OPT_MISS_MASK))
	146	req.options \|= GRU_OPT_MISS_FMM_INTR;
	147
	148	down_write(&current->mm->mmap_sem);
	149	vma = gru_find_vma(req.gseg);
	150	if (vma) {
	151	vdata = vma->vm_private_data;
	152	vdata->vd_user_options = req.options;
	153	vdata->vd_dsr_au_count =
	154	GRU_DS_BYTES_TO_AU(req.data_segment_bytes);
	155	vdata->vd_cbr_au_count = GRU_CB_COUNT_TO_AU(req.control_blocks);
	156	ret = 0;
	157	}
	158	up_write(&current->mm->mmap_sem);
	159
	160	return ret;
	161	}
	162
	163	/*
	164	* Get GRU configuration info (temp - for emulator testing)
	165	*/
	166	static long gru_get_config_info(unsigned long arg)
	167	{
	168	struct gru_config_info info;
	169	int nodesperblade;
	170
	171	if (num_online_nodes() > 1 &&
	172	(uv_node_to_blade_id(1) == uv_node_to_blade_id(0)))
173	nodesperblade = 2;
174	else
175	nodesperblade = 1;
176	info.cpus = num_online_cpus();
177	info.nodes = num_online_nodes();
178	info.blades = info.nodes / nodesperblade;
179	info.chiplets = GRU_CHIPLETS_PER_BLADE * info.blades;
180
181	if (copy_to_user((void __user *)arg, &info, sizeof(info)))
182	return -EFAULT;
183	return 0;
184	}
185
186	/*
187	* Get GRU chiplet status
188	*/
189	static long gru_get_chiplet_status(unsigned long arg)
190	{
191	struct gru_state *gru;
192	struct gru_chiplet_info info;
193
194	if (copy_from_user(&info, (void __user *)arg, sizeof(info)))
195	return -EFAULT;
196
197	if (info.node == -1)
198	info.node = numa_node_id();
199	if (info.node >= num_possible_nodes() \|\|
200	info.chiplet >= GRU_CHIPLETS_PER_HUB \|\|
201	info.node < 0 \|\| info.chiplet < 0)
202	return -EINVAL;
203
204	info.blade = uv_node_to_blade_id(info.node);
205	gru = get_gru(info.blade, info.chiplet);
206
207	info.total_dsr_bytes = GRU_NUM_DSR_BYTES;
208	info.total_cbr = GRU_NUM_CB;
209	info.total_user_dsr_bytes = GRU_NUM_DSR_BYTES -
210	gru->gs_reserved_dsr_bytes;
211	info.total_user_cbr = GRU_NUM_CB - gru->gs_reserved_cbrs;
212	info.free_user_dsr_bytes = hweight64(gru->gs_dsr_map) *
213	GRU_DSR_AU_BYTES;
214	info.free_user_cbr = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE;
215
216	if (copy_to_user((void __user *)arg, &info, sizeof(info)))
217	return -EFAULT;
218	return 0;
219	}
220
221	/*
222	* gru_file_unlocked_ioctl
223	*
224	* Called to update file attributes via IOCTL calls.
225	*/
226	static long gru_file_unlocked_ioctl(struct file *file, unsigned int req,
227	unsigned long arg)
228	{
229	int err = -EBADRQC;
230
231	gru_dbg(grudev, "file %p\n", file);
232
233	switch (req) {
234	case GRU_CREATE_CONTEXT:
235	err = gru_create_new_context(arg);
236	break;
237	case GRU_SET_TASK_SLICE:
238	err = gru_set_task_slice(arg);
239	break;
240	case GRU_USER_GET_EXCEPTION_DETAIL:
241	err = gru_get_exception_detail(arg);
242	break;
243	case GRU_USER_UNLOAD_CONTEXT:
244	err = gru_user_unload_context(arg);
245	break;
246	case GRU_GET_CHIPLET_STATUS:
247	err = gru_get_chiplet_status(arg);
248	break;
249	case GRU_USER_FLUSH_TLB:
250	err = gru_user_flush_tlb(arg);
251	break;
252	case GRU_USER_CALL_OS:
253	err = gru_handle_user_call_os(arg);
254	break;
255	case GRU_GET_CONFIG_INFO:
256	err = gru_get_config_info(arg);
257	break;
258	}
259	return err;
260	}
261
262	/*
263	* Called at init time to build tables for all GRUs that are present in the
264	* system.
265	*/
266	static void gru_init_chiplet(struct gru_state *gru, unsigned long paddr,
267	void *vaddr, int nid, int bid, int grunum)
268	{
269	spin_lock_init(&gru->gs_lock);
270	spin_lock_init(&gru->gs_asid_lock);
271	gru->gs_gru_base_paddr = paddr;
272	gru->gs_gru_base_vaddr = vaddr;
273	gru->gs_gid = bid * GRU_CHIPLETS_PER_BLADE + grunum;
274	gru->gs_blade = gru_base[bid];
275	gru->gs_blade_id = bid;
276	gru->gs_cbr_map = (GRU_CBR_AU == 64) ? ~0 : (1UL << GRU_CBR_AU) - 1;
277	gru->gs_dsr_map = (1UL << GRU_DSR_AU) - 1;
87419412	278	gru->gs_asid_limit = MAX_ASID;
78cf1de4	279	gru_tgh_flush_init(gru);
e1c3219d JS	280	if (gru->gs_gid >= gru_max_gids)
e1c3219d JS	281	gru_max_gids = gru->gs_gid + 1;
43884604	282	gru_dbg(grudev, "bid %d, nid %d, gid %d, vaddr %p (0x%lx)\n",
78cf1de4 JS	283	bid, nid, gru->gs_gid, gru->gs_gru_base_vaddr,
	284	gru->gs_gru_base_paddr);
	285	gru_kservices_init(gru);
	286	}
	287
	288	static int gru_init_tables(unsigned long gru_base_paddr, void *gru_base_vaddr)
	289	{
	290	int pnode, nid, bid, chip;
	291	int cbrs, dsrbytes, n;
	292	int order = get_order(sizeof(struct gru_blade_state));
	293	struct page *page;
	294	struct gru_state *gru;
	295	unsigned long paddr;
	296	void *vaddr;
	297
	298	max_user_cbrs = GRU_NUM_CB;
	299	max_user_dsr_bytes = GRU_NUM_DSR_BYTES;
	300	for_each_online_node(nid) {
	301	bid = uv_node_to_blade_id(nid);
	302	pnode = uv_node_to_pnode(nid);
fe5bb6b0	303	if (bid < 0 \|\| gru_base[bid])
78cf1de4 JS	304	continue;
	305	page = alloc_pages_node(nid, GFP_KERNEL, order);
	306	if (!page)
	307	goto fail;
	308	gru_base[bid] = page_address(page);
	309	memset(gru_base[bid], 0, sizeof(struct gru_blade_state));
	310	gru_base[bid]->bs_lru_gru = &gru_base[bid]->bs_grus[0];
	311	spin_lock_init(&gru_base[bid]->bs_lock);
	312
	313	dsrbytes = 0;
	314	cbrs = 0;
	315	for (gru = gru_base[bid]->bs_grus, chip = 0;
fe5bb6b0	316	chip < GRU_CHIPLETS_PER_BLADE;
78cf1de4 JS	317	chip++, gru++) {
	318	paddr = gru_chiplet_paddr(gru_base_paddr, pnode, chip);
	319	vaddr = gru_chiplet_vaddr(gru_base_vaddr, pnode, chip);
fe5bb6b0	320	gru_init_chiplet(gru, paddr, vaddr, nid, bid, chip);
78cf1de4 JS	321	n = hweight64(gru->gs_cbr_map) * GRU_CBR_AU_SIZE;
	322	cbrs = max(cbrs, n);
	323	n = hweight64(gru->gs_dsr_map) * GRU_DSR_AU_BYTES;
	324	dsrbytes = max(dsrbytes, n);
	325	}
	326	max_user_cbrs = min(max_user_cbrs, cbrs);
	327	max_user_dsr_bytes = min(max_user_dsr_bytes, dsrbytes);
	328	}
	329
	330	return 0;
	331
	332	fail:
	333	for (nid--; nid >= 0; nid--)
	334	free_pages((unsigned long)gru_base[nid], order);
	335	return -ENOMEM;
	336	}
	337
	338	#ifdef CONFIG_IA64
	339
	340	static int get_base_irq(void)
	341	{
	342	return IRQ_GRU;
	343	}
	344
	345	#elif defined CONFIG_X86_64
	346
	347	static void noop(unsigned int irq)
	348	{
	349	}
	350
	351	static struct irq_chip gru_chip = {
	352	.name = "gru",
	353	.mask = noop,
	354	.unmask = noop,
	355	.ack = noop,
	356	};
	357
	358	static int get_base_irq(void)
	359	{
	360	set_irq_chip(IRQ_GRU, &gru_chip);
	361	set_irq_chip(IRQ_GRU + 1, &gru_chip);
	362	return IRQ_GRU;
	363	}
	364	#endif
	365
	366	/*
	367	* gru_init
	368	*
	369	* Called at boot or module load time to initialize the GRUs.
	370	*/
	371	static int __init gru_init(void)
	372	{
	373	int ret, irq, chip;
	374	char id[10];
	375	void *gru_start_vaddr;
	376
1c004004	377	if (!is_uv_system())
e873cff0	378	return 0;
78cf1de4 JS	379
	380	#if defined CONFIG_IA64
	381	gru_start_paddr = 0xd000000000UL; /* ZZZZZZZZZZZZZZZZZZZ fixme */
	382	#else
	383	gru_start_paddr = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR) &
	384	0x7fffffffffffUL;
78cf1de4 JS	385	#endif
78cf1de4 JS	386	gru_start_vaddr = __va(gru_start_paddr);
fe5bb6b0	387	gru_end_paddr = gru_start_paddr + GRU_MAX_BLADES * GRU_SIZE;
78cf1de4 JS	388	printk(KERN_INFO "GRU space: 0x%lx - 0x%lx\n",
	389	gru_start_paddr, gru_end_paddr);
	390	irq = get_base_irq();
	391	for (chip = 0; chip < GRU_CHIPLETS_PER_BLADE; chip++) {
	392	ret = request_irq(irq + chip, gru_intr, 0, id, NULL);
fe5bb6b0	393	/* TODO: fix irq handling on x86. For now ignore failure because
923f7f69 JS	394	* interrupts are not required & not yet fully supported */
923f7f69 JS	395	if (ret) {
fe5bb6b0 JS	396	printk(KERN_WARNING
fe5bb6b0 JS	397	"!!!WARNING: GRU ignoring request failure!!!\n");
923f7f69 JS	398	ret = 0;
923f7f69 JS	399	}
78cf1de4 JS	400	if (ret) {
	401	printk(KERN_ERR "%s: request_irq failed\n",
	402	GRU_DRIVER_ID_STR);
	403	goto exit1;
	404	}
	405	}
	406
	407	ret = misc_register(&gru_miscdev);
	408	if (ret) {
	409	printk(KERN_ERR "%s: misc_register failed\n",
	410	GRU_DRIVER_ID_STR);
	411	goto exit1;
	412	}
	413
	414	ret = gru_proc_init();
	415	if (ret) {
	416	printk(KERN_ERR "%s: proc init failed\n", GRU_DRIVER_ID_STR);
	417	goto exit2;
	418	}
	419
	420	ret = gru_init_tables(gru_start_paddr, gru_start_vaddr);
	421	if (ret) {
	422	printk(KERN_ERR "%s: init tables failed\n", GRU_DRIVER_ID_STR);
	423	goto exit3;
	424	}
	425
	426	printk(KERN_INFO "%s: v%s\n", GRU_DRIVER_ID_STR,
	427	GRU_DRIVER_VERSION_STR);
	428	return 0;
	429
	430	exit3:
	431	gru_proc_exit();
	432	exit2:
	433	misc_deregister(&gru_miscdev);
	434	exit1:
	435	for (--chip; chip >= 0; chip--)
	436	free_irq(irq + chip, NULL);
	437	return ret;
	438
	439	}
	440
	441	static void __exit gru_exit(void)
	442	{
27ca8a7b	443	int i, bid, gid;
78cf1de4 JS	444	int order = get_order(sizeof(struct gru_state) *
	445	GRU_CHIPLETS_PER_BLADE);
	446
1c004004	447	if (!is_uv_system())
8275d102 RH	448	return;
8275d102 RH	449
78cf1de4 JS	450	for (i = 0; i < GRU_CHIPLETS_PER_BLADE; i++)
	451	free_irq(IRQ_GRU + i, NULL);
	452
27ca8a7b JS	453	foreach_gid(gid)
	454	gru_kservices_exit(GID_TO_GRU(gid));
	455
78cf1de4 JS	456	for (bid = 0; bid < GRU_MAX_BLADES; bid++)
	457	free_pages((unsigned long)gru_base[bid], order);
	458
	459	misc_deregister(&gru_miscdev);
	460	gru_proc_exit();
	461	}
	462
	463	static struct file_operations gru_fops = {
	464	.owner = THIS_MODULE,
	465	.unlocked_ioctl = gru_file_unlocked_ioctl,
	466	.mmap = gru_file_mmap,
	467	};
	468
	469	static struct miscdevice gru_miscdev = {
	470	.minor = MISC_DYNAMIC_MINOR,
	471	.name = "gru",
	472	.fops = &gru_fops,
	473	};
	474
	475	struct vm_operations_struct gru_vm_ops = {
	476	.close = gru_vma_close,
	477	.fault = gru_fault,
	478	};
	479
fe5bb6b0	480	#ifndef MODULE
026bde12	481	fs_initcall(gru_init);
fe5bb6b0 JS	482	#else
	483	module_init(gru_init);
	484	#endif
78cf1de4 JS	485	module_exit(gru_exit);
78cf1de4 JS	486
9ca8e40c JS	487	module_param(gru_options, ulong, 0644);
9ca8e40c JS	488	MODULE_PARM_DESC(gru_options, "Various debug options");
78cf1de4 JS	489
	490	MODULE_AUTHOR("Silicon Graphics, Inc.");
	491	MODULE_LICENSE("GPL");
	492	MODULE_DESCRIPTION(GRU_DRIVER_ID_STR GRU_DRIVER_VERSION_STR);
	493	MODULE_VERSION(GRU_DRIVER_VERSION_STR);
	494