cam_sim.c revision 168864
1139743Simp/*- 239212Sgibbs * Common functions for SCSI Interface Modules (SIMs). 339212Sgibbs * 439212Sgibbs * Copyright (c) 1997 Justin T. Gibbs. 539212Sgibbs * All rights reserved. 639212Sgibbs * 739212Sgibbs * Redistribution and use in source and binary forms, with or without 839212Sgibbs * modification, are permitted provided that the following conditions 939212Sgibbs * are met: 1039212Sgibbs * 1. Redistributions of source code must retain the above copyright 1139212Sgibbs * notice, this list of conditions, and the following disclaimer, 1239212Sgibbs * without modification, immediately at the beginning of the file. 1339212Sgibbs * 2. The name of the author may not be used to endorse or promote products 1439212Sgibbs * derived from this software without specific prior written permission. 1539212Sgibbs * 1639212Sgibbs * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1739212Sgibbs * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1839212Sgibbs * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1939212Sgibbs * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 2039212Sgibbs * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2139212Sgibbs * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2239212Sgibbs * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2339212Sgibbs * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2439212Sgibbs * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2539212Sgibbs * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2639212Sgibbs * SUCH DAMAGE. 2739212Sgibbs */ 2839212Sgibbs 29116161Sobrien#include <sys/cdefs.h> 30116161Sobrien__FBSDID("$FreeBSD: head/sys/cam/cam_sim.c 168864 2007-04-19 14:28:43Z scottl $"); 31116161Sobrien 3239212Sgibbs#include <sys/param.h> 3339212Sgibbs#include <sys/systm.h> 3439212Sgibbs#include <sys/malloc.h> 35147723Savatar#include <sys/kernel.h> 36168752Sscottl#include <sys/lock.h> 37168752Sscottl#include <sys/mutex.h> 3839212Sgibbs 3939212Sgibbs#include <cam/cam.h> 4039212Sgibbs#include <cam/cam_ccb.h> 4139212Sgibbs#include <cam/cam_sim.h> 4239212Sgibbs#include <cam/cam_queue.h> 4339212Sgibbs 4439212Sgibbs#define CAM_PATH_ANY (u_int32_t)-1 4539212Sgibbs 46147723SavatarMALLOC_DEFINE(M_CAMSIM, "CAM SIM", "CAM SIM buffers"); 47147723Savatar 4839212Sgibbsstruct cam_devq * 4939212Sgibbscam_simq_alloc(u_int32_t max_sim_transactions) 5039212Sgibbs{ 5139212Sgibbs return (cam_devq_alloc(/*size*/0, max_sim_transactions)); 5239212Sgibbs} 5339212Sgibbs 5439212Sgibbsvoid 5539212Sgibbscam_simq_free(struct cam_devq *devq) 5639212Sgibbs{ 5739212Sgibbs cam_devq_free(devq); 5839212Sgibbs} 5939212Sgibbs 6039212Sgibbsstruct cam_sim * 6139212Sgibbscam_sim_alloc(sim_action_func sim_action, sim_poll_func sim_poll, 6271507Sjhb const char *sim_name, void *softc, u_int32_t unit, 63168752Sscottl struct mtx *mtx, int max_dev_transactions, 6446581Sken int max_tagged_dev_transactions, struct cam_devq *queue) 6539212Sgibbs{ 6639212Sgibbs struct cam_sim *sim; 6739212Sgibbs 68168752Sscottl if (mtx == NULL) 69168752Sscottl return (NULL); 7039212Sgibbs 71168752Sscottl sim = (struct cam_sim *)malloc(sizeof(struct cam_sim), 72168752Sscottl M_CAMSIM, M_NOWAIT); 73168752Sscottl 74168752Sscottl if (sim == NULL) 75168752Sscottl return (NULL); 76168752Sscottl 77168752Sscottl sim->sim_action = sim_action; 78168752Sscottl sim->sim_poll = sim_poll; 79168752Sscottl sim->sim_name = sim_name; 80168752Sscottl sim->softc = softc; 81168752Sscottl sim->path_id = CAM_PATH_ANY; 82168752Sscottl sim->unit_number = unit; 83168752Sscottl sim->bus_id = 0; /* set in xpt_bus_register */ 84168752Sscottl sim->max_tagged_dev_openings = max_tagged_dev_transactions; 85168752Sscottl sim->max_dev_openings = max_dev_transactions; 86168752Sscottl sim->flags = 0; 87168752Sscottl sim->devq = queue; 88168752Sscottl sim->mtx = mtx; 89168752Sscottl if (mtx == &Giant) { 90168752Sscottl sim->flags |= 0; 91168752Sscottl callout_init(&sim->callout, 0); 92168752Sscottl } else { 93168752Sscottl sim->flags |= CAM_SIM_MPSAFE; 94168752Sscottl callout_init(&sim->callout, 1); 9539212Sgibbs } 9639212Sgibbs 97168752Sscottl SLIST_INIT(&sim->ccb_freeq); 98168864Sscottl TAILQ_INIT(&sim->sim_doneq); 99168752Sscottl 10039212Sgibbs return (sim); 10139212Sgibbs} 10239212Sgibbs 10339212Sgibbsvoid 10439212Sgibbscam_sim_free(struct cam_sim *sim, int free_devq) 10539212Sgibbs{ 10639212Sgibbs if (free_devq) 10739212Sgibbs cam_simq_free(sim->devq); 108147723Savatar free(sim, M_CAMSIM); 10939212Sgibbs} 11039212Sgibbs 11139212Sgibbsvoid 11239212Sgibbscam_sim_set_path(struct cam_sim *sim, u_int32_t path_id) 11339212Sgibbs{ 11439212Sgibbs sim->path_id = path_id; 11539212Sgibbs} 116