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