| block.h (225705) | block.h (231743) |
|---|---|
| 1/* 2 * XenBSD block device driver 3 * 4 * Copyright (c) 2009 Scott Long, Yahoo! 5 * Copyright (c) 2009 Frank Suchomel, Citrix 6 * Copyright (c) 2009 Doug F. Rabson, Citrix 7 * Copyright (c) 2005 Kip Macy 8 * Copyright (c) 2003-2004, Keir Fraser & Steve Hand --- 12 unchanged lines hidden (view full) --- 21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 22 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 23 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 24 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 25 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 26 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 27 * DEALINGS IN THE SOFTWARE. 28 * | 1/* 2 * XenBSD block device driver 3 * 4 * Copyright (c) 2009 Scott Long, Yahoo! 5 * Copyright (c) 2009 Frank Suchomel, Citrix 6 * Copyright (c) 2009 Doug F. Rabson, Citrix 7 * Copyright (c) 2005 Kip Macy 8 * Copyright (c) 2003-2004, Keir Fraser & Steve Hand --- 12 unchanged lines hidden (view full) --- 21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 22 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 23 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 24 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 25 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 26 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 27 * DEALINGS IN THE SOFTWARE. 28 * |
| 29 * $FreeBSD: head/sys/dev/xen/blkfront/block.h 225705 2011-09-21 00:02:44Z gibbs $ | 29 * $FreeBSD: head/sys/dev/xen/blkfront/block.h 231743 2012-02-15 06:45:49Z gibbs $ |
| 30 */ 31 32 33#ifndef __XEN_DRIVERS_BLOCK_H__ 34#define __XEN_DRIVERS_BLOCK_H__ 35#include <xen/blkif.h> 36 37/** --- 6 unchanged lines hidden (view full) --- 44/** 45 * The maximum mapped region size per request we will allow in a negotiated 46 * block-front/back communication channel. 47 * 48 * \note We reserve a segement from the maximum supported by the transport to 49 * guarantee we can handle an unaligned transfer without the need to 50 * use a bounce buffer.. 51 */ | 30 */ 31 32 33#ifndef __XEN_DRIVERS_BLOCK_H__ 34#define __XEN_DRIVERS_BLOCK_H__ 35#include <xen/blkif.h> 36 37/** --- 6 unchanged lines hidden (view full) --- 44/** 45 * The maximum mapped region size per request we will allow in a negotiated 46 * block-front/back communication channel. 47 * 48 * \note We reserve a segement from the maximum supported by the transport to 49 * guarantee we can handle an unaligned transfer without the need to 50 * use a bounce buffer.. 51 */ |
| 52#define XBF_MAX_REQUEST_SIZE \ | 52#define XBF_MAX_REQUEST_SIZE \ |
| 53 MIN(MAXPHYS, (BLKIF_MAX_SEGMENTS_PER_REQUEST - 1) * PAGE_SIZE) 54 55/** 56 * The maximum number of segments (within a request header and accompanying 57 * segment blocks) per request we will allow in a negotiated block-front/back 58 * communication channel. 59 */ | 53 MIN(MAXPHYS, (BLKIF_MAX_SEGMENTS_PER_REQUEST - 1) * PAGE_SIZE) 54 55/** 56 * The maximum number of segments (within a request header and accompanying 57 * segment blocks) per request we will allow in a negotiated block-front/back 58 * communication channel. 59 */ |
| 60#define XBF_MAX_SEGMENTS_PER_REQUEST \ 61 (MIN(BLKIF_MAX_SEGMENTS_PER_REQUEST, \ | 60#define XBF_MAX_SEGMENTS_PER_REQUEST \ 61 (MIN(BLKIF_MAX_SEGMENTS_PER_REQUEST, \ |
| 62 (XBF_MAX_REQUEST_SIZE / PAGE_SIZE) + 1)) 63 64/** 65 * The maximum number of shared memory ring pages we will allow in a 66 * negotiated block-front/back communication channel. Allow enough 67 * ring space for all requests to be XBF_MAX_REQUEST_SIZE'd. 68 */ 69#define XBF_MAX_RING_PAGES \ --- 229 unchanged lines hidden --- | 62 (XBF_MAX_REQUEST_SIZE / PAGE_SIZE) + 1)) 63 64/** 65 * The maximum number of shared memory ring pages we will allow in a 66 * negotiated block-front/back communication channel. Allow enough 67 * ring space for all requests to be XBF_MAX_REQUEST_SIZE'd. 68 */ 69#define XBF_MAX_RING_PAGES \ --- 229 unchanged lines hidden --- |