c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota/*
16e76cdd6e3cfaac7d91c3b0644ee1bc6cf52347agiri * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota */
16e76cdd6e3cfaac7d91c3b0644ee1bc6cf52347agiri
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota/*
16e76cdd6e3cfaac7d91c3b0644ee1bc6cf52347agiri * This file contains code imported from the OFED rds source file page.c
16e76cdd6e3cfaac7d91c3b0644ee1bc6cf52347agiri * Oracle elects to have and use the contents of page.c under and governed
16e76cdd6e3cfaac7d91c3b0644ee1bc6cf52347agiri * by the OpenIB.org BSD license (see below for full license text). However,
16e76cdd6e3cfaac7d91c3b0644ee1bc6cf52347agiri * the following notice accompanied the original version of this file:
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota */
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota/*
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * Copyright (c) 2006 Oracle. All rights reserved.
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota *
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * This software is available to you under a choice of one of two
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * licenses. You may choose to be licensed under the terms of the GNU
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * General Public License (GPL) Version 2, available from the file
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * COPYING in the main directory of this source tree, or the
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * OpenIB.org BSD license below:
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota *
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * Redistribution and use in source and binary forms, with or
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * without modification, are permitted provided that the following
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * conditions are met:
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota *
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * - Redistributions of source code must retain the above
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * copyright notice, this list of conditions and the following
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * disclaimer.
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota *
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * - Redistributions in binary form must reproduce the above
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * copyright notice, this list of conditions and the following
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * disclaimer in the documentation and/or other materials
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * provided with the distribution.
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota *
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * SOFTWARE.
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota *
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota */
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota#include <sys/rds.h>
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota#include <sys/ib/clients/rdsv3/rdsv3.h>
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota#include <sys/ib/clients/rdsv3/rdsv3_debug.h>
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota/*
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * @bytes - the number of bytes needed.
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota *
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * XXX - This is different from Linux.
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota */
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Otaint
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Otardsv3_page_remainder_alloc(struct rdsv3_scatterlist *scat, unsigned long bytes,
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota int gfp)
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota{
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota caddr_t page;
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota int ret;
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota ASSERT(rdsv3_sg_page(scat) == NULL);
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota if (bytes >= PAGE_SIZE) {
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota page = kmem_alloc(PAGE_SIZE, gfp);
5d5562f583b2b6affe19bdce0b3c8b1840d667a4Eiji Ota if (!page) {
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota ret = -ENOMEM;
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota } else {
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota rdsv3_sg_set_page(scat, page, PAGE_SIZE, 0);
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota ret = 0;
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota }
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota goto out;
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota }
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota /*
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota * XXX - This is not same as linux.
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota */
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota page = kmem_alloc(bytes, KM_NOSLEEP);
5d5562f583b2b6affe19bdce0b3c8b1840d667a4Eiji Ota if (!page) {
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota ret = -ENOMEM;
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota goto out;
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota }
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota rdsv3_sg_set_page(scat, page, bytes, 0);
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota ret = 0;
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Otaout:
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota RDSV3_DPRINTF5("rdsv3_page_remainder_alloc", "bytes %lu %p %u",
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota bytes, rdsv3_sg_page(scat), scat->length);
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota return (ret);
c0dd49bdd68c0d758a67d56f07826f3b45cfc664Eiji Ota}