cam_sim.c revision 147723
1/*- 2 * Common functions for SCSI Interface Modules (SIMs). 3 * 4 * Copyright (c) 1997 Justin T. Gibbs. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions, and the following disclaimer, 12 * without modification, immediately at the beginning of the file. 13 * 2. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: head/sys/cam/cam_sim.c 147723 2005-07-01 15:21:30Z avatar $"); 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/malloc.h> 35#include <sys/kernel.h> 36 37#include <cam/cam.h> 38#include <cam/cam_ccb.h> 39#include <cam/cam_sim.h> 40#include <cam/cam_queue.h> 41 42#define CAM_PATH_ANY (u_int32_t)-1 43 44MALLOC_DEFINE(M_CAMSIM, "CAM SIM", "CAM SIM buffers"); 45 46struct cam_devq * 47cam_simq_alloc(u_int32_t max_sim_transactions) 48{ 49 return (cam_devq_alloc(/*size*/0, max_sim_transactions)); 50} 51 52void 53cam_simq_free(struct cam_devq *devq) 54{ 55 cam_devq_free(devq); 56} 57 58struct cam_sim * 59cam_sim_alloc(sim_action_func sim_action, sim_poll_func sim_poll, 60 const char *sim_name, void *softc, u_int32_t unit, 61 int max_dev_transactions, 62 int max_tagged_dev_transactions, struct cam_devq *queue) 63{ 64 struct cam_sim *sim; 65 66 /* 67 * If this is the xpt layer creating a sim, then it's OK 68 * to wait for an allocation. 69 * 70 * XXX Should we pass in a flag to indicate that wait is OK? 71 */ 72 if (strcmp(sim_name, "xpt") == 0) 73 sim = (struct cam_sim *)malloc(sizeof(struct cam_sim), 74 M_CAMSIM, M_WAITOK); 75 else 76 sim = (struct cam_sim *)malloc(sizeof(struct cam_sim), 77 M_CAMSIM, M_NOWAIT); 78 79 if (sim != NULL) { 80 sim->sim_action = sim_action; 81 sim->sim_poll = sim_poll; 82 sim->sim_name = sim_name; 83 sim->softc = softc; 84 sim->path_id = CAM_PATH_ANY; 85 sim->unit_number = unit; 86 sim->bus_id = 0; /* set in xpt_bus_register */ 87 sim->max_tagged_dev_openings = max_tagged_dev_transactions; 88 sim->max_dev_openings = max_dev_transactions; 89 sim->flags = 0; 90 callout_handle_init(&sim->c_handle); 91 sim->devq = queue; 92 } 93 94 return (sim); 95} 96 97void 98cam_sim_free(struct cam_sim *sim, int free_devq) 99{ 100 if (free_devq) 101 cam_simq_free(sim->devq); 102 free(sim, M_CAMSIM); 103} 104 105void 106cam_sim_set_path(struct cam_sim *sim, u_int32_t path_id) 107{ 108 sim->path_id = path_id; 109} 110