Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 1162 deletions

diff --git a/ANDROID_3.4.5/drivers/misc/sgi-gru/grukservices.c b/ANDROID_3.4.5/drivers/misc/sgi-gru/grukservices.c
deleted file mode 100644
index 913de07e..00000000
--- a/ANDROID_3.4.5/drivers/misc/sgi-gru/grukservices.c
+++ /dev/null
@@ -1,1162 +0,0 @@
-/*
- * SN Platform GRU Driver
- *
- *              KERNEL SERVICES THAT USE THE GRU
- *
- *  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/kernel.h>
-#include <linux/errno.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
-#include <linux/spinlock.h>
-#include <linux/device.h>
-#include <linux/miscdevice.h>
-#include <linux/proc_fs.h>
-#include <linux/interrupt.h>
-#include <linux/uaccess.h>
-#include <linux/delay.h>
-#include <linux/export.h>
-#include <asm/io_apic.h>
-#include "gru.h"
-#include "grulib.h"
-#include "grutables.h"
-#include "grukservices.h"
-#include "gru_instructions.h"
-#include <asm/uv/uv_hub.h>
-
-/*
- * Kernel GRU Usage
- *
- * The following is an interim algorithm for management of kernel GRU
- * resources. This will likely be replaced when we better understand the
- * kernel/user requirements.
- *
- * Blade percpu resources reserved for kernel use. These resources are
- * reserved whenever the the kernel context for the blade is loaded. Note
- * that the kernel context is not guaranteed to be always available. It is
- * loaded on demand & can be stolen by a user if the user demand exceeds the
- * kernel demand. The kernel can always reload the kernel context but
- * a SLEEP may be required!!!.
- *
- * Async Overview:
- *
- * 	Each blade has one "kernel context" that owns GRU kernel resources
- * 	located on the blade. Kernel drivers use GRU resources in this context
- * 	for sending messages, zeroing memory, etc.
- *
- * 	The kernel context is dynamically loaded on demand. If it is not in
- * 	use by the kernel, the kernel context can be unloaded & given to a user.
- * 	The kernel context will be reloaded when needed. This may require that
- * 	a context be stolen from a user.
- * 		NOTE: frequent unloading/reloading of the kernel context is
- * 		expensive. We are depending on batch schedulers, cpusets, sane
- * 		drivers or some other mechanism to prevent the need for frequent
- *	 	stealing/reloading.
- *
- * 	The kernel context consists of two parts:
- * 		- 1 CB & a few DSRs that are reserved for each cpu on the blade.
- * 		  Each cpu has it's own private resources & does not share them
- * 		  with other cpus. These resources are used serially, ie,
- * 		  locked, used & unlocked  on each call to a function in
- * 		  grukservices.
- * 		  	(Now that we have dynamic loading of kernel contexts, I
- * 		  	 may rethink this & allow sharing between cpus....)
- *
- *		- Additional resources can be reserved long term & used directly
- *		  by UV drivers located in the kernel. Drivers using these GRU
- *		  resources can use asynchronous GRU instructions that send
- *		  interrupts on completion.
- *		  	- these resources must be explicitly locked/unlocked
- *		  	- locked resources prevent (obviously) the kernel
- *		  	  context from being unloaded.
- *			- drivers using these resource directly issue their own
- *			  GRU instruction and must wait/check completion.
- *
- * 		  When these resources are reserved, the caller can optionally
- * 		  associate a wait_queue with the resources and use asynchronous
- * 		  GRU instructions. When an async GRU instruction completes, the
- * 		  driver will do a wakeup on the event.
- *
- */
-
-
-#define ASYNC_HAN_TO_BID(h)	((h) - 1)
-#define ASYNC_BID_TO_HAN(b)	((b) + 1)
-#define ASYNC_HAN_TO_BS(h)	gru_base[ASYNC_HAN_TO_BID(h)]
-
-#define GRU_NUM_KERNEL_CBR	1
-#define GRU_NUM_KERNEL_DSR_BYTES 256
-#define GRU_NUM_KERNEL_DSR_CL	(GRU_NUM_KERNEL_DSR_BYTES /		\
-					GRU_CACHE_LINE_BYTES)
-
-/* GRU instruction attributes for all instructions */
-#define IMA			IMA_CB_DELAY
-
-/* GRU cacheline size is always 64 bytes - even on arches with 128 byte lines */
-#define __gru_cacheline_aligned__                               \
-	__attribute__((__aligned__(GRU_CACHE_LINE_BYTES)))
-
-#define MAGIC	0x1234567887654321UL
-
-/* Default retry count for GRU errors on kernel instructions */
-#define EXCEPTION_RETRY_LIMIT	3
-
-/* Status of message queue sections */
-#define MQS_EMPTY		0
-#define MQS_FULL		1
-#define MQS_NOOP		2
-
-/*----------------- RESOURCE MANAGEMENT -------------------------------------*/
-/* optimized for x86_64 */
-struct message_queue {
-	union gru_mesqhead	head __gru_cacheline_aligned__;	/* CL 0 */
-	int			qlines;				/* DW 1 */
-	long 			hstatus[2];
-	void 			*next __gru_cacheline_aligned__;/* CL 1 */
-	void 			*limit;
-	void 			*start;
-	void 			*start2;
-	char			data ____cacheline_aligned;	/* CL 2 */
-};
-
-/* First word in every message - used by mesq interface */
-struct message_header {
-	char	present;
-	char	present2;
-	char 	lines;
-	char	fill;
-};
-
-#define HSTATUS(mq, h)	((mq) + offsetof(struct message_queue, hstatus[h]))
-
-/*
- * Reload the blade's kernel context into a GRU chiplet. Called holding
- * the bs_kgts_sema for READ. Will steal user contexts if necessary.
- */
-static void gru_load_kernel_context(struct gru_blade_state *bs, int blade_id)
-{
-	struct gru_state *gru;
-	struct gru_thread_state *kgts;
-	void *vaddr;
-	int ctxnum, ncpus;
-
-	up_read(&bs->bs_kgts_sema);
-	down_write(&bs->bs_kgts_sema);
-
-	if (!bs->bs_kgts) {
-		bs->bs_kgts = gru_alloc_gts(NULL, 0, 0, 0, 0, 0);
-		bs->bs_kgts->ts_user_blade_id = blade_id;
-	}
-	kgts = bs->bs_kgts;
-
-	if (!kgts->ts_gru) {
-		STAT(load_kernel_context);
-		ncpus = uv_blade_nr_possible_cpus(blade_id);
-		kgts->ts_cbr_au_count = GRU_CB_COUNT_TO_AU(
-			GRU_NUM_KERNEL_CBR * ncpus + bs->bs_async_cbrs);
-		kgts->ts_dsr_au_count = GRU_DS_BYTES_TO_AU(
-			GRU_NUM_KERNEL_DSR_BYTES * ncpus +
-				bs->bs_async_dsr_bytes);
-		while (!gru_assign_gru_context(kgts)) {
-			msleep(1);
-			gru_steal_context(kgts);
-		}
-		gru_load_context(kgts);
-		gru = bs->bs_kgts->ts_gru;
-		vaddr = gru->gs_gru_base_vaddr;
-		ctxnum = kgts->ts_ctxnum;
-		bs->kernel_cb = get_gseg_base_address_cb(vaddr, ctxnum, 0);
-		bs->kernel_dsr = get_gseg_base_address_ds(vaddr, ctxnum, 0);
-	}
-	downgrade_write(&bs->bs_kgts_sema);
-}
-
-/*
- * Free all kernel contexts that are not currently in use.
- *   Returns 0 if all freed, else number of inuse context.
- */
-static int gru_free_kernel_contexts(void)
-{
-	struct gru_blade_state *bs;
-	struct gru_thread_state *kgts;
-	int bid, ret = 0;
-
-	for (bid = 0; bid < GRU_MAX_BLADES; bid++) {
-		bs = gru_base[bid];
-		if (!bs)
-			continue;
-
-		/* Ignore busy contexts. Don't want to block here.  */
-		if (down_write_trylock(&bs->bs_kgts_sema)) {
-			kgts = bs->bs_kgts;
-			if (kgts && kgts->ts_gru)
-				gru_unload_context(kgts, 0);
-			bs->bs_kgts = NULL;
-			up_write(&bs->bs_kgts_sema);
-			kfree(kgts);
-		} else {
-			ret++;
-		}
-	}
-	return ret;
-}
-
-/*
- * Lock & load the kernel context for the specified blade.
- */
-static struct gru_blade_state *gru_lock_kernel_context(int blade_id)
-{
-	struct gru_blade_state *bs;
-	int bid;
-
-	STAT(lock_kernel_context);
-again:
-	bid = blade_id < 0 ? uv_numa_blade_id() : blade_id;
-	bs = gru_base[bid];
-
-	/* Handle the case where migration occurred while waiting for the sema */
-	down_read(&bs->bs_kgts_sema);
-	if (blade_id < 0 && bid != uv_numa_blade_id()) {
-		up_read(&bs->bs_kgts_sema);
-		goto again;
-	}
-	if (!bs->bs_kgts || !bs->bs_kgts->ts_gru)
-		gru_load_kernel_context(bs, bid);
-	return bs;
-
-}
-
-/*
- * Unlock the kernel context for the specified blade. Context is not
- * unloaded but may be stolen before next use.
- */
-static void gru_unlock_kernel_context(int blade_id)
-{
-	struct gru_blade_state *bs;
-
-	bs = gru_base[blade_id];
-	up_read(&bs->bs_kgts_sema);
-	STAT(unlock_kernel_context);
-}
-
-/*
- * Reserve & get pointers to the DSR/CBRs reserved for the current cpu.
- * 	- returns with preemption disabled
- */
-static int gru_get_cpu_resources(int dsr_bytes, void **cb, void **dsr)
-{
-	struct gru_blade_state *bs;
-	int lcpu;
-
-	BUG_ON(dsr_bytes > GRU_NUM_KERNEL_DSR_BYTES);
-	preempt_disable();
-	bs = gru_lock_kernel_context(-1);
-	lcpu = uv_blade_processor_id();
-	*cb = bs->kernel_cb + lcpu * GRU_HANDLE_STRIDE;
-	*dsr = bs->kernel_dsr + lcpu * GRU_NUM_KERNEL_DSR_BYTES;
-	return 0;
-}
-
-/*
- * Free the current cpus reserved DSR/CBR resources.
- */
-static void gru_free_cpu_resources(void *cb, void *dsr)
-{
-	gru_unlock_kernel_context(uv_numa_blade_id());
-	preempt_enable();
-}
-
-/*
- * Reserve GRU resources to be used asynchronously.
- *   Note: currently supports only 1 reservation per blade.
- *
- * 	input:
- * 		blade_id  - blade on which resources should be reserved
- * 		cbrs	  - number of CBRs
- * 		dsr_bytes - number of DSR bytes needed
- *	output:
- *		handle to identify resource
- *		(0 = async resources already reserved)
- */
-unsigned long gru_reserve_async_resources(int blade_id, int cbrs, int dsr_bytes,
-			struct completion *cmp)
-{
-	struct gru_blade_state *bs;
-	struct gru_thread_state *kgts;
-	int ret = 0;
-
-	bs = gru_base[blade_id];
-
-	down_write(&bs->bs_kgts_sema);
-
-	/* Verify no resources already reserved */
-	if (bs->bs_async_dsr_bytes + bs->bs_async_cbrs)
-		goto done;
-	bs->bs_async_dsr_bytes = dsr_bytes;
-	bs->bs_async_cbrs = cbrs;
-	bs->bs_async_wq = cmp;
-	kgts = bs->bs_kgts;
-
-	/* Resources changed. Unload context if already loaded */
-	if (kgts && kgts->ts_gru)
-		gru_unload_context(kgts, 0);
-	ret = ASYNC_BID_TO_HAN(blade_id);
-
-done:
-	up_write(&bs->bs_kgts_sema);
-	return ret;
-}
-
-/*
- * Release async resources previously reserved.
- *
- *	input:
- *		han - handle to identify resources
- */
-void gru_release_async_resources(unsigned long han)
-{
-	struct gru_blade_state *bs = ASYNC_HAN_TO_BS(han);
-
-	down_write(&bs->bs_kgts_sema);
-	bs->bs_async_dsr_bytes = 0;
-	bs->bs_async_cbrs = 0;
-	bs->bs_async_wq = NULL;
-	up_write(&bs->bs_kgts_sema);
-}
-
-/*
- * Wait for async GRU instructions to complete.
- *
- *	input:
- *		han - handle to identify resources
- */
-void gru_wait_async_cbr(unsigned long han)
-{
-	struct gru_blade_state *bs = ASYNC_HAN_TO_BS(han);
-
-	wait_for_completion(bs->bs_async_wq);
-	mb();
-}
-
-/*
- * Lock previous reserved async GRU resources
- *
- *	input:
- *		han - handle to identify resources
- *	output:
- *		cb  - pointer to first CBR
- *		dsr - pointer to first DSR
- */
-void gru_lock_async_resource(unsigned long han,  void **cb, void **dsr)
-{
-	struct gru_blade_state *bs = ASYNC_HAN_TO_BS(han);
-	int blade_id = ASYNC_HAN_TO_BID(han);
-	int ncpus;
-
-	gru_lock_kernel_context(blade_id);
-	ncpus = uv_blade_nr_possible_cpus(blade_id);
-	if (cb)
-		*cb = bs->kernel_cb + ncpus * GRU_HANDLE_STRIDE;
-	if (dsr)
-		*dsr = bs->kernel_dsr + ncpus * GRU_NUM_KERNEL_DSR_BYTES;
-}
-
-/*
- * Unlock previous reserved async GRU resources
- *
- *	input:
- *		han - handle to identify resources
- */
-void gru_unlock_async_resource(unsigned long han)
-{
-	int blade_id = ASYNC_HAN_TO_BID(han);
-
-	gru_unlock_kernel_context(blade_id);
-}
-
-/*----------------------------------------------------------------------*/
-int gru_get_cb_exception_detail(void *cb,
-		struct control_block_extended_exc_detail *excdet)
-{
-	struct gru_control_block_extended *cbe;
-	struct gru_thread_state *kgts = NULL;
-	unsigned long off;
-	int cbrnum, bid;
-
-	/*
-	 * Locate kgts for cb. This algorithm is SLOW but
-	 * this function is rarely called (ie., almost never).
-	 * Performance does not matter.
-	 */
-	for_each_possible_blade(bid) {
-		if (!gru_base[bid])
-			break;
-		kgts = gru_base[bid]->bs_kgts;
-		if (!kgts || !kgts->ts_gru)
-			continue;
-		off = cb - kgts->ts_gru->gs_gru_base_vaddr;
-		if (off < GRU_SIZE)
-			break;
-		kgts = NULL;
-	}
-	BUG_ON(!kgts);
-	cbrnum = thread_cbr_number(kgts, get_cb_number(cb));
-	cbe = get_cbe(GRUBASE(cb), cbrnum);
-	gru_flush_cache(cbe);	/* CBE not coherent */
-	sync_core();
-	excdet->opc = cbe->opccpy;
-	excdet->exopc = cbe->exopccpy;
-	excdet->ecause = cbe->ecause;
-	excdet->exceptdet0 = cbe->idef1upd;
-	excdet->exceptdet1 = cbe->idef3upd;
-	gru_flush_cache(cbe);
-	return 0;
-}
-
-char *gru_get_cb_exception_detail_str(int ret, void *cb,
-				      char *buf, int size)
-{
-	struct gru_control_block_status *gen = (void *)cb;
-	struct control_block_extended_exc_detail excdet;
-
-	if (ret > 0 && gen->istatus == CBS_EXCEPTION) {
-		gru_get_cb_exception_detail(cb, &excdet);
-		snprintf(buf, size,
-			"GRU:%d exception: cb %p, opc %d, exopc %d, ecause 0x%x,"
-			"excdet0 0x%lx, excdet1 0x%x", smp_processor_id(),
-			gen, excdet.opc, excdet.exopc, excdet.ecause,
-			excdet.exceptdet0, excdet.exceptdet1);
-	} else {
-		snprintf(buf, size, "No exception");
-	}
-	return buf;
-}
-
-static int gru_wait_idle_or_exception(struct gru_control_block_status *gen)
-{
-	while (gen->istatus >= CBS_ACTIVE) {
-		cpu_relax();
-		barrier();
-	}
-	return gen->istatus;
-}
-
-static int gru_retry_exception(void *cb)
-{
-	struct gru_control_block_status *gen = (void *)cb;
-	struct control_block_extended_exc_detail excdet;
-	int retry = EXCEPTION_RETRY_LIMIT;
-
-	while (1)  {
-		if (gru_wait_idle_or_exception(gen) == CBS_IDLE)
-			return CBS_IDLE;
-		if (gru_get_cb_message_queue_substatus(cb))
-			return CBS_EXCEPTION;
-		gru_get_cb_exception_detail(cb, &excdet);
-		if ((excdet.ecause & ~EXCEPTION_RETRY_BITS) ||
-				(excdet.cbrexecstatus & CBR_EXS_ABORT_OCC))
-			break;
-		if (retry-- == 0)
-			break;
-		gen->icmd = 1;
-		gru_flush_cache(gen);
-	}
-	return CBS_EXCEPTION;
-}
-
-int gru_check_status_proc(void *cb)
-{
-	struct gru_control_block_status *gen = (void *)cb;
-	int ret;
-
-	ret = gen->istatus;
-	if (ret == CBS_EXCEPTION)
-		ret = gru_retry_exception(cb);
-	rmb();
-	return ret;
-
-}
-
-int gru_wait_proc(void *cb)
-{
-	struct gru_control_block_status *gen = (void *)cb;
-	int ret;
-
-	ret = gru_wait_idle_or_exception(gen);
-	if (ret == CBS_EXCEPTION)
-		ret = gru_retry_exception(cb);
-	rmb();
-	return ret;
-}
-
-void gru_abort(int ret, void *cb, char *str)
-{
-	char buf[GRU_EXC_STR_SIZE];
-
-	panic("GRU FATAL ERROR: %s - %s\n", str,
-	      gru_get_cb_exception_detail_str(ret, cb, buf, sizeof(buf)));
-}
-
-void gru_wait_abort_proc(void *cb)
-{
-	int ret;
-
-	ret = gru_wait_proc(cb);
-	if (ret)
-		gru_abort(ret, cb, "gru_wait_abort");
-}
-
-
-/*------------------------------ MESSAGE QUEUES -----------------------------*/
-
-/* Internal status . These are NOT returned to the user. */
-#define MQIE_AGAIN		-1	/* try again */
-
-
-/*
- * Save/restore the "present" flag that is in the second line of 2-line
- * messages
- */
-static inline int get_present2(void *p)
-{
-	struct message_header *mhdr = p + GRU_CACHE_LINE_BYTES;
-	return mhdr->present;
-}
-
-static inline void restore_present2(void *p, int val)
-{
-	struct message_header *mhdr = p + GRU_CACHE_LINE_BYTES;
-	mhdr->present = val;
-}
-
-/*
- * Create a message queue.
- * 	qlines - message queue size in cache lines. Includes 2-line header.
- */
-int gru_create_message_queue(struct gru_message_queue_desc *mqd,
-		void *p, unsigned int bytes, int nasid, int vector, int apicid)
-{
-	struct message_queue *mq = p;
-	unsigned int qlines;
-
-	qlines = bytes / GRU_CACHE_LINE_BYTES - 2;
-	memset(mq, 0, bytes);
-	mq->start = &mq->data;
-	mq->start2 = &mq->data + (qlines / 2 - 1) * GRU_CACHE_LINE_BYTES;
-	mq->next = &mq->data;
-	mq->limit = &mq->data + (qlines - 2) * GRU_CACHE_LINE_BYTES;
-	mq->qlines = qlines;
-	mq->hstatus[0] = 0;
-	mq->hstatus[1] = 1;
-	mq->head = gru_mesq_head(2, qlines / 2 + 1);
-	mqd->mq = mq;
-	mqd->mq_gpa = uv_gpa(mq);
-	mqd->qlines = qlines;
-	mqd->interrupt_pnode = nasid >> 1;
-	mqd->interrupt_vector = vector;
-	mqd->interrupt_apicid = apicid;
-	return 0;
-}
-EXPORT_SYMBOL_GPL(gru_create_message_queue);
-
-/*
- * Send a NOOP message to a message queue
- * 	Returns:
- * 		 0 - if queue is full after the send. This is the normal case
- * 		     but various races can change this.
- *		-1 - if mesq sent successfully but queue not full
- *		>0 - unexpected error. MQE_xxx returned
- */
-static int send_noop_message(void *cb, struct gru_message_queue_desc *mqd,
-				void *mesg)
-{
-	const struct message_header noop_header = {
-					.present = MQS_NOOP, .lines = 1};
-	unsigned long m;
-	int substatus, ret;
-	struct message_header save_mhdr, *mhdr = mesg;
-
-	STAT(mesq_noop);
-	save_mhdr = *mhdr;
-	*mhdr = noop_header;
-	gru_mesq(cb, mqd->mq_gpa, gru_get_tri(mhdr), 1, IMA);
-	ret = gru_wait(cb);
-
-	if (ret) {
-		substatus = gru_get_cb_message_queue_substatus(cb);
-		switch (substatus) {
-		case CBSS_NO_ERROR:
-			STAT(mesq_noop_unexpected_error);
-			ret = MQE_UNEXPECTED_CB_ERR;
-			break;
-		case CBSS_LB_OVERFLOWED:
-			STAT(mesq_noop_lb_overflow);
-			ret = MQE_CONGESTION;
-			break;
-		case CBSS_QLIMIT_REACHED:
-			STAT(mesq_noop_qlimit_reached);
-			ret = 0;
-			break;
-		case CBSS_AMO_NACKED:
-			STAT(mesq_noop_amo_nacked);
-			ret = MQE_CONGESTION;
-			break;
-		case CBSS_PUT_NACKED:
-			STAT(mesq_noop_put_nacked);
-			m = mqd->mq_gpa + (gru_get_amo_value_head(cb) << 6);
-			gru_vstore(cb, m, gru_get_tri(mesg), XTYPE_CL, 1, 1,
-						IMA);
-			if (gru_wait(cb) == CBS_IDLE)
-				ret = MQIE_AGAIN;
-			else
-				ret = MQE_UNEXPECTED_CB_ERR;
-			break;
-		case CBSS_PAGE_OVERFLOW:
-			STAT(mesq_noop_page_overflow);
-			/* fallthru */
-		default:
-			BUG();
-		}
-	}
-	*mhdr = save_mhdr;
-	return ret;
-}
-
-/*
- * Handle a gru_mesq full.
- */
-static int send_message_queue_full(void *cb, struct gru_message_queue_desc *mqd,
-				void *mesg, int lines)
-{
-	union gru_mesqhead mqh;
-	unsigned int limit, head;
-	unsigned long avalue;
-	int half, qlines;
-
-	/* Determine if switching to first/second half of q */
-	avalue = gru_get_amo_value(cb);
-	head = gru_get_amo_value_head(cb);
-	limit = gru_get_amo_value_limit(cb);
-
-	qlines = mqd->qlines;
-	half = (limit != qlines);
-
-	if (half)
-		mqh = gru_mesq_head(qlines / 2 + 1, qlines);
-	else
-		mqh = gru_mesq_head(2, qlines / 2 + 1);
-
-	/* Try to get lock for switching head pointer */
-	gru_gamir(cb, EOP_IR_CLR, HSTATUS(mqd->mq_gpa, half), XTYPE_DW, IMA);
-	if (gru_wait(cb) != CBS_IDLE)
-		goto cberr;
-	if (!gru_get_amo_value(cb)) {
-		STAT(mesq_qf_locked);
-		return MQE_QUEUE_FULL;
-	}
-
-	/* Got the lock. Send optional NOP if queue not full, */
-	if (head != limit) {
-		if (send_noop_message(cb, mqd, mesg)) {
-			gru_gamir(cb, EOP_IR_INC, HSTATUS(mqd->mq_gpa, half),
-					XTYPE_DW, IMA);
-			if (gru_wait(cb) != CBS_IDLE)
-				goto cberr;
-			STAT(mesq_qf_noop_not_full);
-			return MQIE_AGAIN;
-		}
-		avalue++;
-	}
-
-	/* Then flip queuehead to other half of queue. */
-	gru_gamer(cb, EOP_ERR_CSWAP, mqd->mq_gpa, XTYPE_DW, mqh.val, avalue,
-							IMA);
-	if (gru_wait(cb) != CBS_IDLE)
-		goto cberr;
-
-	/* If not successfully in swapping queue head, clear the hstatus lock */
-	if (gru_get_amo_value(cb) != avalue) {
-		STAT(mesq_qf_switch_head_failed);
-		gru_gamir(cb, EOP_IR_INC, HSTATUS(mqd->mq_gpa, half), XTYPE_DW,
-							IMA);
-		if (gru_wait(cb) != CBS_IDLE)
-			goto cberr;
-	}
-	return MQIE_AGAIN;
-cberr:
-	STAT(mesq_qf_unexpected_error);
-	return MQE_UNEXPECTED_CB_ERR;
-}
-
-/*
- * Handle a PUT failure. Note: if message was a 2-line message, one of the
- * lines might have successfully have been written. Before sending the
- * message, "present" must be cleared in BOTH lines to prevent the receiver
- * from prematurely seeing the full message.
- */
-static int send_message_put_nacked(void *cb, struct gru_message_queue_desc *mqd,
-			void *mesg, int lines)
-{
-	unsigned long m, *val = mesg, gpa, save;
-	int ret;
-
-	m = mqd->mq_gpa + (gru_get_amo_value_head(cb) << 6);
-	if (lines == 2) {
-		gru_vset(cb, m, 0, XTYPE_CL, lines, 1, IMA);
-		if (gru_wait(cb) != CBS_IDLE)
-			return MQE_UNEXPECTED_CB_ERR;
-	}
-	gru_vstore(cb, m, gru_get_tri(mesg), XTYPE_CL, lines, 1, IMA);
-	if (gru_wait(cb) != CBS_IDLE)
-		return MQE_UNEXPECTED_CB_ERR;
-
-	if (!mqd->interrupt_vector)
-		return MQE_OK;
-
-	/*
-	 * Send a cross-partition interrupt to the SSI that contains the target
-	 * message queue. Normally, the interrupt is automatically delivered by
-	 * hardware but some error conditions require explicit delivery.
-	 * Use the GRU to deliver the interrupt. Otherwise partition failures
-	 * could cause unrecovered errors.
-	 */
-	gpa = uv_global_gru_mmr_address(mqd->interrupt_pnode, UVH_IPI_INT);
-	save = *val;
-	*val = uv_hub_ipi_value(mqd->interrupt_apicid, mqd->interrupt_vector,
-				dest_Fixed);
-	gru_vstore_phys(cb, gpa, gru_get_tri(mesg), IAA_REGISTER, IMA);
-	ret = gru_wait(cb);
-	*val = save;
-	if (ret != CBS_IDLE)
-		return MQE_UNEXPECTED_CB_ERR;
-	return MQE_OK;
-}
-
-/*
- * Handle a gru_mesq failure. Some of these failures are software recoverable
- * or retryable.
- */
-static int send_message_failure(void *cb, struct gru_message_queue_desc *mqd,
-				void *mesg, int lines)
-{
-	int substatus, ret = 0;
-
-	substatus = gru_get_cb_message_queue_substatus(cb);
-	switch (substatus) {
-	case CBSS_NO_ERROR:
-		STAT(mesq_send_unexpected_error);
-		ret = MQE_UNEXPECTED_CB_ERR;
-		break;
-	case CBSS_LB_OVERFLOWED:
-		STAT(mesq_send_lb_overflow);
-		ret = MQE_CONGESTION;
-		break;
-	case CBSS_QLIMIT_REACHED:
-		STAT(mesq_send_qlimit_reached);
-		ret = send_message_queue_full(cb, mqd, mesg, lines);
-		break;
-	case CBSS_AMO_NACKED:
-		STAT(mesq_send_amo_nacked);
-		ret = MQE_CONGESTION;
-		break;
-	case CBSS_PUT_NACKED:
-		STAT(mesq_send_put_nacked);
-		ret = send_message_put_nacked(cb, mqd, mesg, lines);
-		break;
-	case CBSS_PAGE_OVERFLOW:
-		STAT(mesq_page_overflow);
-		/* fallthru */
-	default:
-		BUG();
-	}
-	return ret;
-}
-
-/*
- * Send a message to a message queue
- * 	mqd	message queue descriptor
- * 	mesg	message. ust be vaddr within a GSEG
- * 	bytes	message size (<= 2 CL)
- */
-int gru_send_message_gpa(struct gru_message_queue_desc *mqd, void *mesg,
-				unsigned int bytes)
-{
-	struct message_header *mhdr;
-	void *cb;
-	void *dsr;
-	int istatus, clines, ret;
-
-	STAT(mesq_send);
-	BUG_ON(bytes < sizeof(int) || bytes > 2 * GRU_CACHE_LINE_BYTES);
-
-	clines = DIV_ROUND_UP(bytes, GRU_CACHE_LINE_BYTES);
-	if (gru_get_cpu_resources(bytes, &cb, &dsr))
-		return MQE_BUG_NO_RESOURCES;
-	memcpy(dsr, mesg, bytes);
-	mhdr = dsr;
-	mhdr->present = MQS_FULL;
-	mhdr->lines = clines;
-	if (clines == 2) {
-		mhdr->present2 = get_present2(mhdr);
-		restore_present2(mhdr, MQS_FULL);
-	}
-
-	do {
-		ret = MQE_OK;
-		gru_mesq(cb, mqd->mq_gpa, gru_get_tri(mhdr), clines, IMA);
-		istatus = gru_wait(cb);
-		if (istatus != CBS_IDLE)
-			ret = send_message_failure(cb, mqd, dsr, clines);
-	} while (ret == MQIE_AGAIN);
-	gru_free_cpu_resources(cb, dsr);
-
-	if (ret)
-		STAT(mesq_send_failed);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(gru_send_message_gpa);
-
-/*
- * Advance the receive pointer for the queue to the next message.
- */
-void gru_free_message(struct gru_message_queue_desc *mqd, void *mesg)
-{
-	struct message_queue *mq = mqd->mq;
-	struct message_header *mhdr = mq->next;
-	void *next, *pnext;
-	int half = -1;
-	int lines = mhdr->lines;
-
-	if (lines == 2)
-		restore_present2(mhdr, MQS_EMPTY);
-	mhdr->present = MQS_EMPTY;
-
-	pnext = mq->next;
-	next = pnext + GRU_CACHE_LINE_BYTES * lines;
-	if (next == mq->limit) {
-		next = mq->start;
-		half = 1;
-	} else if (pnext < mq->start2 && next >= mq->start2) {
-		half = 0;
-	}
-
-	if (half >= 0)
-		mq->hstatus[half] = 1;
-	mq->next = next;
-}
-EXPORT_SYMBOL_GPL(gru_free_message);
-
-/*
- * Get next message from message queue. Return NULL if no message
- * present. User must call next_message() to move to next message.
- * 	rmq	message queue
- */
-void *gru_get_next_message(struct gru_message_queue_desc *mqd)
-{
-	struct message_queue *mq = mqd->mq;
-	struct message_header *mhdr = mq->next;
-	int present = mhdr->present;
-
-	/* skip NOOP messages */
-	while (present == MQS_NOOP) {
-		gru_free_message(mqd, mhdr);
-		mhdr = mq->next;
-		present = mhdr->present;
-	}
-
-	/* Wait for both halves of 2 line messages */
-	if (present == MQS_FULL && mhdr->lines == 2 &&
-				get_present2(mhdr) == MQS_EMPTY)
-		present = MQS_EMPTY;
-
-	if (!present) {
-		STAT(mesq_receive_none);
-		return NULL;
-	}
-
-	if (mhdr->lines == 2)
-		restore_present2(mhdr, mhdr->present2);
-
-	STAT(mesq_receive);
-	return mhdr;
-}
-EXPORT_SYMBOL_GPL(gru_get_next_message);
-
-/* ---------------------- GRU DATA COPY FUNCTIONS ---------------------------*/
-
-/*
- * Load a DW from a global GPA. The GPA can be a memory or MMR address.
- */
-int gru_read_gpa(unsigned long *value, unsigned long gpa)
-{
-	void *cb;
-	void *dsr;
-	int ret, iaa;
-
-	STAT(read_gpa);
-	if (gru_get_cpu_resources(GRU_NUM_KERNEL_DSR_BYTES, &cb, &dsr))
-		return MQE_BUG_NO_RESOURCES;
-	iaa = gpa >> 62;
-	gru_vload_phys(cb, gpa, gru_get_tri(dsr), iaa, IMA);
-	ret = gru_wait(cb);
-	if (ret == CBS_IDLE)
-		*value = *(unsigned long *)dsr;
-	gru_free_cpu_resources(cb, dsr);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(gru_read_gpa);
-
-
-/*
- * Copy a block of data using the GRU resources
- */
-int gru_copy_gpa(unsigned long dest_gpa, unsigned long src_gpa,
-				unsigned int bytes)
-{
-	void *cb;
-	void *dsr;
-	int ret;
-
-	STAT(copy_gpa);
-	if (gru_get_cpu_resources(GRU_NUM_KERNEL_DSR_BYTES, &cb, &dsr))
-		return MQE_BUG_NO_RESOURCES;
-	gru_bcopy(cb, src_gpa, dest_gpa, gru_get_tri(dsr),
-		  XTYPE_B, bytes, GRU_NUM_KERNEL_DSR_CL, IMA);
-	ret = gru_wait(cb);
-	gru_free_cpu_resources(cb, dsr);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(gru_copy_gpa);
-
-/* ------------------- KERNEL QUICKTESTS RUN AT STARTUP ----------------*/
-/* 	Temp - will delete after we gain confidence in the GRU		*/
-
-static int quicktest0(unsigned long arg)
-{
-	unsigned long word0;
-	unsigned long word1;
-	void *cb;
-	void *dsr;
-	unsigned long *p;
-	int ret = -EIO;
-
-	if (gru_get_cpu_resources(GRU_CACHE_LINE_BYTES, &cb, &dsr))
-		return MQE_BUG_NO_RESOURCES;
-	p = dsr;
-	word0 = MAGIC;
-	word1 = 0;
-
-	gru_vload(cb, uv_gpa(&word0), gru_get_tri(dsr), XTYPE_DW, 1, 1, IMA);
-	if (gru_wait(cb) != CBS_IDLE) {
-		printk(KERN_DEBUG "GRU:%d quicktest0: CBR failure 1\n", smp_processor_id());
-		goto done;
-	}
-
-	if (*p != MAGIC) {
-		printk(KERN_DEBUG "GRU:%d quicktest0 bad magic 0x%lx\n", smp_processor_id(), *p);
-		goto done;
-	}
-	gru_vstore(cb, uv_gpa(&word1), gru_get_tri(dsr), XTYPE_DW, 1, 1, IMA);
-	if (gru_wait(cb) != CBS_IDLE) {
-		printk(KERN_DEBUG "GRU:%d quicktest0: CBR failure 2\n", smp_processor_id());
-		goto done;
-	}
-
-	if (word0 != word1 || word1 != MAGIC) {
-		printk(KERN_DEBUG
-		       "GRU:%d quicktest0 err: found 0x%lx, expected 0x%lx\n",
-		     smp_processor_id(), word1, MAGIC);
-		goto done;
-	}
-	ret = 0;
-
-done:
-	gru_free_cpu_resources(cb, dsr);
-	return ret;
-}
-
-#define ALIGNUP(p, q)	((void *)(((unsigned long)(p) + (q) - 1) & ~(q - 1)))
-
-static int quicktest1(unsigned long arg)
-{
-	struct gru_message_queue_desc mqd;
-	void *p, *mq;
-	unsigned long *dw;
-	int i, ret = -EIO;
-	char mes[GRU_CACHE_LINE_BYTES], *m;
-
-	/* Need  1K cacheline aligned that does not cross page boundary */
-	p = kmalloc(4096, 0);
-	if (p == NULL)
-		return -ENOMEM;
-	mq = ALIGNUP(p, 1024);
-	memset(mes, 0xee, sizeof(mes));
-	dw = mq;
-
-	gru_create_message_queue(&mqd, mq, 8 * GRU_CACHE_LINE_BYTES, 0, 0, 0);
-	for (i = 0; i < 6; i++) {
-		mes[8] = i;
-		do {
-			ret = gru_send_message_gpa(&mqd, mes, sizeof(mes));
-		} while (ret == MQE_CONGESTION);
-		if (ret)
-			break;
-	}
-	if (ret != MQE_QUEUE_FULL || i != 4) {
-		printk(KERN_DEBUG "GRU:%d quicktest1: unexpect status %d, i %d\n",
-		       smp_processor_id(), ret, i);
-		goto done;
-	}
-
-	for (i = 0; i < 6; i++) {
-		m = gru_get_next_message(&mqd);
-		if (!m || m[8] != i)
-			break;
-		gru_free_message(&mqd, m);
-	}
-	if (i != 4) {
-		printk(KERN_DEBUG "GRU:%d quicktest2: bad message, i %d, m %p, m8 %d\n",
-			smp_processor_id(), i, m, m ? m[8] : -1);
-		goto done;
-	}
-	ret = 0;
-
-done:
-	kfree(p);
-	return ret;
-}
-
-static int quicktest2(unsigned long arg)
-{
-	static DECLARE_COMPLETION(cmp);
-	unsigned long han;
-	int blade_id = 0;
-	int numcb = 4;
-	int ret = 0;
-	unsigned long *buf;
-	void *cb0, *cb;
-	struct gru_control_block_status *gen;
-	int i, k, istatus, bytes;
-
-	bytes = numcb * 4 * 8;
-	buf = kmalloc(bytes, GFP_KERNEL);
-	if (!buf)
-		return -ENOMEM;
-
-	ret = -EBUSY;
-	han = gru_reserve_async_resources(blade_id, numcb, 0, &cmp);
-	if (!han)
-		goto done;
-
-	gru_lock_async_resource(han, &cb0, NULL);
-	memset(buf, 0xee, bytes);
-	for (i = 0; i < numcb; i++)
-		gru_vset(cb0 + i * GRU_HANDLE_STRIDE, uv_gpa(&buf[i * 4]), 0,
-				XTYPE_DW, 4, 1, IMA_INTERRUPT);
-
-	ret = 0;
-	k = numcb;
-	do {
-		gru_wait_async_cbr(han);
-		for (i = 0; i < numcb; i++) {
-			cb = cb0 + i * GRU_HANDLE_STRIDE;
-			istatus = gru_check_status(cb);
-			if (istatus != CBS_ACTIVE && istatus != CBS_CALL_OS)
-				break;
-		}
-		if (i == numcb)
-			continue;
-		if (istatus != CBS_IDLE) {
-			printk(KERN_DEBUG "GRU:%d quicktest2: cb %d, exception\n", smp_processor_id(), i);
-			ret = -EFAULT;
-		} else if (buf[4 * i] || buf[4 * i + 1] || buf[4 * i + 2] ||
-				buf[4 * i + 3]) {
-			printk(KERN_DEBUG "GRU:%d quicktest2:cb %d,  buf 0x%lx, 0x%lx, 0x%lx, 0x%lx\n",
-			       smp_processor_id(), i, buf[4 * i], buf[4 * i + 1], buf[4 * i + 2], buf[4 * i + 3]);
-			ret = -EIO;
-		}
-		k--;
-		gen = cb;
-		gen->istatus = CBS_CALL_OS; /* don't handle this CBR again */
-	} while (k);
-	BUG_ON(cmp.done);
-
-	gru_unlock_async_resource(han);
-	gru_release_async_resources(han);
-done:
-	kfree(buf);
-	return ret;
-}
-
-#define BUFSIZE 200
-static int quicktest3(unsigned long arg)
-{
-	char buf1[BUFSIZE], buf2[BUFSIZE];
-	int ret = 0;
-
-	memset(buf2, 0, sizeof(buf2));
-	memset(buf1, get_cycles() & 255, sizeof(buf1));
-	gru_copy_gpa(uv_gpa(buf2), uv_gpa(buf1), BUFSIZE);
-	if (memcmp(buf1, buf2, BUFSIZE)) {
-		printk(KERN_DEBUG "GRU:%d quicktest3 error\n", smp_processor_id());
-		ret = -EIO;
-	}
-	return ret;
-}
-
-/*
- * Debugging only. User hook for various kernel tests
- * of driver & gru.
- */
-int gru_ktest(unsigned long arg)
-{
-	int ret = -EINVAL;
-
-	switch (arg & 0xff) {
-	case 0:
-		ret = quicktest0(arg);
-		break;
-	case 1:
-		ret = quicktest1(arg);
-		break;
-	case 2:
-		ret = quicktest2(arg);
-		break;
-	case 3:
-		ret = quicktest3(arg);
-		break;
-	case 99:
-		ret = gru_free_kernel_contexts();
-		break;
-	}
-	return ret;
-
-}
-
-int gru_kservices_init(void)
-{
-	return 0;
-}
-
-void gru_kservices_exit(void)
-{
-	if (gru_free_kernel_contexts())
-		BUG();
-}
-