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/cdefs.h> 27 __FBSDID("$FreeBSD$"); 28 29 #include <sys/param.h> 30 #include <sys/kernel.h> 31 #include <sys/systm.h> 32 #include <sys/malloc.h> 33 #include <sys/mutex.h> 34 35 #include <cam/cam.h> 36 #include <cam/cam_ccb.h> 37 #include <cam/cam_debug.h> 38 #include <cam/cam_sim.h> 39 #include <cam/cam_xpt_sim.h> 40 #include <cam/mmc/mmc_sim.h> 41 42 #include "mmc_sim_if.h" 43 44 static void 45 mmc_cam_default_poll(struct cam_sim *sim) 46 { 47 struct mmc_sim *mmc_sim; 48 49 mmc_sim = cam_sim_softc(sim); 50 MMC_SIM_CAM_POLL(mmc_sim->dev); 51 } 52 53 static void 54 mmc_sim_task(void *arg, int pending) 55 { 56 struct mmc_sim *mmc_sim; 57 struct ccb_trans_settings *cts; 58 int rv; 59 60 mmc_sim = arg; 61 62 if (mmc_sim->ccb == NULL) 63 return; 64 65 cts = &mmc_sim->ccb->cts; 66 switch (mmc_sim->ccb->ccb_h.func_code) { 67 case XPT_MMC_GET_TRAN_SETTINGS: 68 rv = MMC_SIM_GET_TRAN_SETTINGS(mmc_sim->dev, &cts->proto_specific.mmc); 69 if (rv != 0) 70 mmc_sim->ccb->ccb_h.status = CAM_REQ_INVALID; 71 else 72 mmc_sim->ccb->ccb_h.status = CAM_REQ_CMP; 73 break; 74 case XPT_MMC_SET_TRAN_SETTINGS: 75 rv = MMC_SIM_SET_TRAN_SETTINGS(mmc_sim->dev, &cts->proto_specific.mmc); 76 if (rv != 0) 77 mmc_sim->ccb->ccb_h.status = CAM_REQ_INVALID; 78 else 79 mmc_sim->ccb->ccb_h.status = CAM_REQ_CMP; 80 break; 81 default: 82 panic("Unsupported ccb func %x\n", mmc_sim->ccb->ccb_h.func_code); 83 break; 84 } 85 86 xpt_done(mmc_sim->ccb); 87 mmc_sim->ccb = NULL; 88 } 89 90 91 static void 92 mmc_cam_sim_default_action(struct cam_sim *sim, union ccb *ccb) 93 { 94 struct mmc_sim *mmc_sim; 95 struct ccb_trans_settings_mmc mmc; 96 int rv; 97 98 mmc_sim = cam_sim_softc(sim); 99 100 mtx_assert(&mmc_sim->mtx, MA_OWNED); 101 102 if (mmc_sim->ccb != NULL) { 103 ccb->ccb_h.status = CAM_BUSY; 104 xpt_done(ccb); 105 return; 106 } 107 108 switch (ccb->ccb_h.func_code) { 109 case XPT_PATH_INQ: 110 rv = MMC_SIM_GET_TRAN_SETTINGS(mmc_sim->dev, &mmc); 111 if (rv != 0) { 112 ccb->ccb_h.status = CAM_REQ_INVALID; 113 } else { 114 mmc_path_inq(&ccb->cpi, "Deglitch Networks", 115 sim, mmc.host_max_data); 116 } 117 break; 118 case XPT_GET_TRAN_SETTINGS: 119 { 120 struct ccb_trans_settings *cts = &ccb->cts; 121 122 rv = MMC_SIM_GET_TRAN_SETTINGS(mmc_sim->dev, &cts->proto_specific.mmc); 123 if (rv != 0) 124 ccb->ccb_h.status = CAM_REQ_INVALID; 125 else { 126 cts->protocol = PROTO_MMCSD; 127 cts->protocol_version = 1; 128 cts->transport = XPORT_MMCSD; 129 cts->transport_version = 1; 130 cts->xport_specific.valid = 0; 131 ccb->ccb_h.status = CAM_REQ_CMP; 132 } 133 break; 134 } 135 case XPT_MMC_GET_TRAN_SETTINGS: 136 { 137 ccb->ccb_h.status = CAM_SIM_QUEUED; 138 mmc_sim->ccb = ccb; 139 taskqueue_enqueue(taskqueue_thread, &mmc_sim->sim_task); 140 return; 141 /* NOTREACHED */ 142 break; 143 } 144 case XPT_SET_TRAN_SETTINGS: 145 { 146 struct ccb_trans_settings *cts = &ccb->cts; 147 148 rv = MMC_SIM_SET_TRAN_SETTINGS(mmc_sim->dev, &cts->proto_specific.mmc); 149 if (rv != 0) 150 ccb->ccb_h.status = CAM_REQ_INVALID; 151 else 152 ccb->ccb_h.status = CAM_REQ_CMP; 153 break; 154 } 155 case XPT_MMC_SET_TRAN_SETTINGS: 156 { 157 ccb->ccb_h.status = CAM_SIM_QUEUED; 158 mmc_sim->ccb = ccb; 159 taskqueue_enqueue(taskqueue_thread, &mmc_sim->sim_task); 160 return; 161 /* NOTREACHED */ 162 break; 163 } 164 case XPT_RESET_BUS: 165 ccb->ccb_h.status = CAM_REQ_CMP; 166 break; 167 case XPT_MMC_IO: 168 { 169 rv = MMC_SIM_CAM_REQUEST(mmc_sim->dev, ccb); 170 if (rv != 0) 171 ccb->ccb_h.status = CAM_SIM_QUEUED; 172 return; 173 /* NOTREACHED */ 174 break; 175 } 176 default: 177 ccb->ccb_h.status = CAM_REQ_INVALID; 178 break; 179 } 180 xpt_done(ccb); 181 return; 182 } 183 184 int 185 mmc_cam_sim_alloc(device_t dev, const char *name, struct mmc_sim *mmc_sim) 186 { 187 kobjop_desc_t kobj_desc; 188 kobj_method_t *kobj_method; 189 190 mmc_sim->dev = dev; 191 192 if ((mmc_sim->devq = cam_simq_alloc(1)) == NULL) { 193 goto fail; 194 } 195 196 snprintf(mmc_sim->name, sizeof(mmc_sim->name), "%s_sim", name); 197 mtx_init(&mmc_sim->mtx, mmc_sim->name, NULL, MTX_DEF); 198 199 /* Provide sim_poll hook only if the device has the poll method. */ 200 kobj_desc = &mmc_sim_cam_poll_desc; 201 kobj_method = kobj_lookup_method(((kobj_t)dev)->ops->cls, NULL, 202 kobj_desc); 203 mmc_sim->sim = cam_sim_alloc(mmc_cam_sim_default_action, 204 kobj_method == &kobj_desc->deflt ? NULL : mmc_cam_default_poll, 205 mmc_sim->name, mmc_sim, device_get_unit(dev), 206 &mmc_sim->mtx, 1, 1, mmc_sim->devq); 207 208 if (mmc_sim->sim == NULL) { 209 cam_simq_free(mmc_sim->devq); 210 device_printf(dev, "cannot allocate CAM SIM\n"); 211 goto fail; 212 } 213 214 mtx_lock(&mmc_sim->mtx); 215 if (xpt_bus_register(mmc_sim->sim, dev, 0) != 0) { 216 device_printf(dev, "cannot register SCSI pass-through bus\n"); 217 cam_sim_free(mmc_sim->sim, FALSE); 218 cam_simq_free(mmc_sim->devq); 219 mtx_unlock(&mmc_sim->mtx); 220 goto fail; 221 } 222 223 mtx_unlock(&mmc_sim->mtx); 224 TASK_INIT(&mmc_sim->sim_task, 0, mmc_sim_task, mmc_sim); 225 226 return (0); 227 228 fail: 229 mmc_cam_sim_free(mmc_sim); 230 return (1); 231 } 232 233 void 234 mmc_cam_sim_free(struct mmc_sim *mmc_sim) 235 { 236 237 if (mmc_sim->sim != NULL) { 238 mtx_lock(&mmc_sim->mtx); 239 xpt_bus_deregister(cam_sim_path(mmc_sim->sim)); 240 cam_sim_free(mmc_sim->sim, FALSE); 241 mtx_unlock(&mmc_sim->mtx); 242 } 243 244 if (mmc_sim->devq != NULL) 245 cam_simq_free(mmc_sim->devq); 246 } 247 248 void 249 mmc_cam_sim_discover(struct mmc_sim *mmc_sim) 250 { 251 252 mmccam_start_discovery(mmc_sim->sim); 253 } 254