1/*- 2 * Copyright (c) 2020-2021 Emmanuel Vadot <manu@FreeBSD.org> 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 18 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 20 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 21 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26#include <sys/param.h> 27#include <sys/kernel.h> 28#include <sys/systm.h> 29#include <sys/malloc.h> 30#include <sys/mutex.h> 31 32#include <cam/cam.h> 33#include <cam/cam_ccb.h> 34#include <cam/cam_debug.h> 35#include <cam/cam_sim.h> 36#include <cam/cam_xpt_sim.h> 37#include <cam/mmc/mmc_sim.h> 38 39#include "mmc_sim_if.h" 40 41static void 42mmc_cam_default_poll(struct cam_sim *sim) 43{ 44 struct mmc_sim *mmc_sim; 45 46 mmc_sim = cam_sim_softc(sim); 47 MMC_SIM_CAM_POLL(mmc_sim->dev); 48} 49 50static void 51mmc_sim_task(void *arg, int pending) 52{ 53 struct mmc_sim *mmc_sim; 54 struct ccb_trans_settings *cts; 55 int rv; 56 57 mmc_sim = arg; 58 59 if (mmc_sim->ccb == NULL) 60 return; 61 62 cts = &mmc_sim->ccb->cts; 63 switch (mmc_sim->ccb->ccb_h.func_code) { 64 case XPT_MMC_GET_TRAN_SETTINGS: 65 rv = MMC_SIM_GET_TRAN_SETTINGS(mmc_sim->dev, &cts->proto_specific.mmc); 66 if (rv != 0) 67 mmc_sim->ccb->ccb_h.status = CAM_REQ_INVALID; 68 else 69 mmc_sim->ccb->ccb_h.status = CAM_REQ_CMP; 70 break; 71 case XPT_MMC_SET_TRAN_SETTINGS: 72 rv = MMC_SIM_SET_TRAN_SETTINGS(mmc_sim->dev, &cts->proto_specific.mmc); 73 if (rv != 0) 74 mmc_sim->ccb->ccb_h.status = CAM_REQ_INVALID; 75 else 76 mmc_sim->ccb->ccb_h.status = CAM_REQ_CMP; 77 break; 78 default: 79 panic("Unsupported ccb func %x\n", mmc_sim->ccb->ccb_h.func_code); 80 break; 81 } 82 83 xpt_done(mmc_sim->ccb); 84 mmc_sim->ccb = NULL; 85} 86 87 88static void 89mmc_cam_sim_default_action(struct cam_sim *sim, union ccb *ccb) 90{ 91 struct mmc_sim *mmc_sim; 92 struct ccb_trans_settings_mmc mmc; 93 int rv; 94 95 mmc_sim = cam_sim_softc(sim); 96 97 mtx_assert(&mmc_sim->mtx, MA_OWNED); 98 99 if (mmc_sim->ccb != NULL) { 100 ccb->ccb_h.status = CAM_BUSY; 101 xpt_done(ccb); 102 return; 103 } 104 105 switch (ccb->ccb_h.func_code) { 106 case XPT_PATH_INQ: 107 rv = MMC_SIM_GET_TRAN_SETTINGS(mmc_sim->dev, &mmc); 108 if (rv != 0) { 109 ccb->ccb_h.status = CAM_REQ_INVALID; 110 } else { 111 mmc_path_inq(&ccb->cpi, "Deglitch Networks", 112 sim, mmc.host_max_data); 113 } 114 break; 115 case XPT_GET_TRAN_SETTINGS: 116 { 117 struct ccb_trans_settings *cts = &ccb->cts; 118 119 rv = MMC_SIM_GET_TRAN_SETTINGS(mmc_sim->dev, &cts->proto_specific.mmc); 120 if (rv != 0) 121 ccb->ccb_h.status = CAM_REQ_INVALID; 122 else { 123 cts->protocol = PROTO_MMCSD; 124 cts->protocol_version = 1; 125 cts->transport = XPORT_MMCSD; 126 cts->transport_version = 1; 127 cts->xport_specific.valid = 0; 128 ccb->ccb_h.status = CAM_REQ_CMP; 129 } 130 break; 131 } 132 case XPT_MMC_GET_TRAN_SETTINGS: 133 { 134 ccb->ccb_h.status = CAM_SIM_QUEUED; 135 mmc_sim->ccb = ccb; 136 taskqueue_enqueue(taskqueue_thread, &mmc_sim->sim_task); 137 return; 138 /* NOTREACHED */ 139 break; 140 } 141 case XPT_SET_TRAN_SETTINGS: 142 { 143 struct ccb_trans_settings *cts = &ccb->cts; 144 145 rv = MMC_SIM_SET_TRAN_SETTINGS(mmc_sim->dev, &cts->proto_specific.mmc); 146 if (rv != 0) 147 ccb->ccb_h.status = CAM_REQ_INVALID; 148 else 149 ccb->ccb_h.status = CAM_REQ_CMP; 150 break; 151 } 152 case XPT_MMC_SET_TRAN_SETTINGS: 153 { 154 ccb->ccb_h.status = CAM_SIM_QUEUED; 155 mmc_sim->ccb = ccb; 156 taskqueue_enqueue(taskqueue_thread, &mmc_sim->sim_task); 157 return; 158 /* NOTREACHED */ 159 break; 160 } 161 case XPT_RESET_BUS: 162 ccb->ccb_h.status = CAM_REQ_CMP; 163 break; 164 case XPT_MMC_IO: 165 { 166 rv = MMC_SIM_CAM_REQUEST(mmc_sim->dev, ccb); 167 if (rv != 0) 168 ccb->ccb_h.status = CAM_SIM_QUEUED; 169 return; 170 /* NOTREACHED */ 171 break; 172 } 173 default: 174 ccb->ccb_h.status = CAM_REQ_INVALID; 175 break; 176 } 177 xpt_done(ccb); 178 return; 179} 180 181int 182mmc_cam_sim_alloc(device_t dev, const char *name, struct mmc_sim *mmc_sim) 183{ 184 kobjop_desc_t kobj_desc; 185 kobj_method_t *kobj_method; 186 187 mmc_sim->dev = dev; 188 189 if ((mmc_sim->devq = cam_simq_alloc(1)) == NULL) { 190 goto fail; 191 } 192 193 snprintf(mmc_sim->name, sizeof(mmc_sim->name), "%s_sim", name); 194 mtx_init(&mmc_sim->mtx, mmc_sim->name, NULL, MTX_DEF); 195 196 /* Provide sim_poll hook only if the device has the poll method. */ 197 kobj_desc = &mmc_sim_cam_poll_desc; 198 kobj_method = kobj_lookup_method(((kobj_t)dev)->ops->cls, NULL, 199 kobj_desc); 200 mmc_sim->sim = cam_sim_alloc(mmc_cam_sim_default_action, 201 kobj_method == &kobj_desc->deflt ? NULL : mmc_cam_default_poll, 202 mmc_sim->name, mmc_sim, device_get_unit(dev), 203 &mmc_sim->mtx, 1, 1, mmc_sim->devq); 204 205 if (mmc_sim->sim == NULL) { 206 cam_simq_free(mmc_sim->devq); 207 device_printf(dev, "cannot allocate CAM SIM\n"); 208 goto fail; 209 } 210 211 mtx_lock(&mmc_sim->mtx); 212 if (xpt_bus_register(mmc_sim->sim, dev, 0) != 0) { 213 device_printf(dev, "cannot register SCSI pass-through bus\n"); 214 cam_sim_free(mmc_sim->sim, FALSE); 215 cam_simq_free(mmc_sim->devq); 216 mtx_unlock(&mmc_sim->mtx); 217 goto fail; 218 } 219 220 mtx_unlock(&mmc_sim->mtx); 221 TASK_INIT(&mmc_sim->sim_task, 0, mmc_sim_task, mmc_sim); 222 223 return (0); 224 225fail: 226 mmc_cam_sim_free(mmc_sim); 227 return (1); 228} 229 230void 231mmc_cam_sim_free(struct mmc_sim *mmc_sim) 232{ 233 234 if (mmc_sim->sim != NULL) { 235 mtx_lock(&mmc_sim->mtx); 236 xpt_bus_deregister(cam_sim_path(mmc_sim->sim)); 237 cam_sim_free(mmc_sim->sim, FALSE); 238 mtx_unlock(&mmc_sim->mtx); 239 } 240 241 if (mmc_sim->devq != NULL) 242 cam_simq_free(mmc_sim->devq); 243} 244 245void 246mmc_cam_sim_discover(struct mmc_sim *mmc_sim) 247{ 248 249 mmccam_start_discovery(mmc_sim->sim); 250} 251