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 * $FreeBSD: src/sys/cam/cam_sim.c,v 1.3 1999/08/28 00:40:42 peter Exp $ 29 * $DragonFly: src/sys/bus/cam/cam_sim.c,v 1.4 2003/08/07 21:16:44 dillon Exp $ 30 */ 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/malloc.h> 35 36 #include "cam.h" 37 #include "cam_ccb.h" 38 #include "cam_sim.h" 39 #include "cam_queue.h" 40 41 #define CAM_PATH_ANY (u_int32_t)-1 42 43 struct cam_devq * 44 cam_simq_alloc(u_int32_t max_sim_transactions) 45 { 46 return (cam_devq_alloc(/*size*/0, max_sim_transactions)); 47 } 48 49 void 50 cam_simq_free(struct cam_devq *devq) 51 { 52 cam_devq_free(devq); 53 } 54 55 struct cam_sim * 56 cam_sim_alloc(sim_action_func sim_action, sim_poll_func sim_poll, 57 const char *sim_name, void *softc, u_int32_t unit, 58 int max_dev_transactions, 59 int max_tagged_dev_transactions, struct cam_devq *queue) 60 { 61 struct cam_sim *sim; 62 63 /* 64 * If this is the xpt layer creating a sim, then it's OK 65 * to wait for an allocation. 66 * 67 * XXX Should we pass in a flag to indicate that wait is OK? 68 */ 69 if (strcmp(sim_name, "xpt") == 0) 70 sim = (struct cam_sim *)malloc(sizeof(struct cam_sim), 71 M_DEVBUF, M_WAITOK); 72 else 73 sim = (struct cam_sim *)malloc(sizeof(struct cam_sim), 74 M_DEVBUF, M_NOWAIT); 75 76 if (sim != NULL) { 77 sim->sim_action = sim_action; 78 sim->sim_poll = sim_poll; 79 sim->sim_name = sim_name; 80 sim->softc = softc; 81 sim->path_id = CAM_PATH_ANY; 82 sim->unit_number = unit; 83 sim->bus_id = 0; /* set in xpt_bus_register */ 84 sim->max_tagged_dev_openings = max_tagged_dev_transactions; 85 sim->max_dev_openings = max_dev_transactions; 86 sim->flags = 0; 87 callout_handle_init(&sim->c_handle); 88 sim->devq = queue; 89 } 90 91 return (sim); 92 } 93 94 void 95 cam_sim_free(struct cam_sim *sim, int free_devq) 96 { 97 if (free_devq) 98 cam_simq_free(sim->devq); 99 free(sim, M_DEVBUF); 100 } 101 102 void 103 cam_sim_set_path(struct cam_sim *sim, u_int32_t path_id) 104 { 105 sim->path_id = path_id; 106 } 107