mmccam: Add mmc_sim, a generic sim for mmc driver to use
This adds a generic sim that abstract a lot of what needs to be implemented in a driver for mmccam support. A new interface with three methods is added : - mmc_sim_get_tran_settings: Use to get what the controller supports in term of capabilities, freq etc ... - mmc_sim_set_tran_settings: Use to change the speed/freq/etc of the sdcard host controller - mmc_sim_cam_request: Used for MMCIO requests Differential Revision: https://reviews.freebsd.org/D27485 Reviewed by: kibab
This commit is contained in:
Emmanuel Vadot
parent
4c1ecf5502
commit
47bde7925b
194
sys/cam/mmc/mmc_sim.c
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194
sys/cam/mmc/mmc_sim.c
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@ -0,0 +1,194 @@
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/*-
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* Copyright (c) 2020 Emmanuel Vadot <manu@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <cam/cam.h>
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#include <cam/cam_ccb.h>
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#include <cam/cam_debug.h>
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#include <cam/cam_sim.h>
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#include <cam/cam_xpt_sim.h>
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#include <cam/mmc/mmc_sim.h>
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#include "mmc_sim_if.h"
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static void
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mmc_cam_default_poll(struct cam_sim *sim)
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{
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return;
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}
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static void
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mmc_cam_sim_default_action(struct cam_sim *sim, union ccb *ccb)
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{
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struct mmc_sim *mmc_sim;
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struct ccb_trans_settings_mmc mmc;
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int rv;
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mmc_sim = cam_sim_softc(sim);
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if (mmc_sim == NULL) {
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ccb->ccb_h.status = CAM_SEL_TIMEOUT;
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xpt_done(ccb);
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return;
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}
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mtx_assert(&mmc_sim->mtx, MA_OWNED);
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switch (ccb->ccb_h.func_code) {
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case XPT_PATH_INQ:
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rv = MMC_SIM_GET_TRAN_SETTINGS(mmc_sim->dev, &mmc);
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if (rv != 0) {
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ccb->ccb_h.status = CAM_REQ_INVALID;
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} else {
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mmc_path_inq(&ccb->cpi, "Deglitch Networks",
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sim, mmc.host_max_data);
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}
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break;
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case XPT_GET_TRAN_SETTINGS:
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{
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struct ccb_trans_settings *cts = &ccb->cts;
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rv = MMC_SIM_GET_TRAN_SETTINGS(mmc_sim->dev, &cts->proto_specific.mmc);
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if (rv != 0)
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ccb->ccb_h.status = CAM_REQ_INVALID;
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else {
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cts->protocol = PROTO_MMCSD;
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cts->protocol_version = 1;
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cts->transport = XPORT_MMCSD;
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cts->transport_version = 1;
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cts->xport_specific.valid = 0;
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ccb->ccb_h.status = CAM_REQ_CMP;
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}
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break;
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}
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case XPT_SET_TRAN_SETTINGS:
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{
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struct ccb_trans_settings *cts = &ccb->cts;
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rv = MMC_SIM_SET_TRAN_SETTINGS(mmc_sim->dev, &cts->proto_specific.mmc);
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if (rv != 0)
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ccb->ccb_h.status = CAM_REQ_INVALID;
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else
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ccb->ccb_h.status = CAM_REQ_CMP;
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break;
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}
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case XPT_RESET_BUS:
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ccb->ccb_h.status = CAM_REQ_CMP;
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break;
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case XPT_MMC_IO:
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{
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rv = MMC_SIM_CAM_REQUEST(mmc_sim->dev, ccb);
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if (rv != 0)
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ccb->ccb_h.status = CAM_REQ_INPROG;
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else
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ccb->ccb_h.status = CAM_REQ_INVALID;
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return;
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/* NOTREACHED */
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break;
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}
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default:
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ccb->ccb_h.status = CAM_REQ_INVALID;
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break;
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}
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xpt_done(ccb);
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return;
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}
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int
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mmc_cam_sim_alloc(device_t dev, const char *name, struct mmc_sim *mmc_sim)
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{
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char sim_name[64], mtx_name[64];
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mmc_sim->dev = dev;
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if ((mmc_sim->devq = cam_simq_alloc(1)) == NULL) {
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goto fail;
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}
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snprintf(sim_name, sizeof(sim_name), "%s_sim", name);
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snprintf(mtx_name, sizeof(mtx_name), "%s_mtx", name);
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mtx_init(&mmc_sim->mtx, sim_name, NULL, MTX_DEF);
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mmc_sim->sim = cam_sim_alloc_dev(mmc_cam_sim_default_action,
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mmc_cam_default_poll,
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name, mmc_sim, dev,
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&mmc_sim->mtx, 1, 1, mmc_sim->devq);
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if (mmc_sim->sim == NULL) {
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cam_simq_free(mmc_sim->devq);
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device_printf(dev, "cannot allocate CAM SIM\n");
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goto fail;
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}
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mtx_lock(&mmc_sim->mtx);
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if (xpt_bus_register(mmc_sim->sim, dev, 0) != 0) {
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device_printf(dev, "cannot register SCSI pass-through bus\n");
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cam_sim_free(mmc_sim->sim, FALSE);
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cam_simq_free(mmc_sim->devq);
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mtx_unlock(&mmc_sim->mtx);
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goto fail;
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}
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mtx_unlock(&mmc_sim->mtx);
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return (0);
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fail:
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mmc_cam_sim_free(mmc_sim);
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return (1);
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}
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void
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mmc_cam_sim_free(struct mmc_sim *mmc_sim)
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{
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if (mmc_sim->sim != NULL) {
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mtx_lock(&mmc_sim->mtx);
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xpt_bus_deregister(cam_sim_path(mmc_sim->sim));
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cam_sim_free(mmc_sim->sim, FALSE);
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mtx_unlock(&mmc_sim->mtx);
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}
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if (mmc_sim->devq != NULL)
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cam_simq_free(mmc_sim->devq);
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}
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void
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mmc_cam_sim_discover(struct mmc_sim *mmc_sim)
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{
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mmccam_start_discovery(mmc_sim->sim);
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}
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43
sys/cam/mmc/mmc_sim.h
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43
sys/cam/mmc/mmc_sim.h
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@ -0,0 +1,43 @@
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/*-
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* Copyright (c) 2020 Emmanuel Vadot <manu@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef __MMC_SIM_H__
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#define __MMC_SIM_H__
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struct mmc_sim {
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struct mmc_cam_sim_softc *sc;
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struct mtx mtx;
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struct cam_devq *devq;
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struct cam_sim *sim;
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device_t dev;
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};
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int mmc_cam_sim_alloc(device_t dev, const char *name, struct mmc_sim *mmc_sim);
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void mmc_cam_sim_free(struct mmc_sim *sim);
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void mmc_cam_sim_discover(struct mmc_sim *mmc_sim);
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#endif /* __MMC_SIM_H__ */
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54
sys/cam/mmc/mmc_sim_if.m
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54
sys/cam/mmc/mmc_sim_if.m
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@ -0,0 +1,54 @@
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#-
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# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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#
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# Copyright (c) 2020 Emmanuel Vadot <manu@FreeBSD.org>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# $FreeBSD$
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#include <sys/types.h>
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#include <sys/callout.h>
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#include <cam/cam.h>
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#include <cam/cam_ccb.h>
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#include <cam/cam_debug.h>
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#include <cam/cam_sim.h>
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#include <cam/cam_xpt_sim.h>
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#include <cam/mmc/mmc_sim.h>
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INTERFACE mmc_sim;
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METHOD int get_tran_settings {
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device_t dev;
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struct ccb_trans_settings_mmc *cts;
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};
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METHOD int set_tran_settings {
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device_t dev;
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struct ccb_trans_settings_mmc *cts;
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};
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METHOD int cam_request {
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device_t dev;
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union ccb *ccb;
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};
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@ -121,6 +121,8 @@ cam/ctl/ctl_error.c optional ctl
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cam/ctl/ctl_util.c optional ctl
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cam/ctl/scsi_ctl.c optional ctl
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cam/mmc/mmc_xpt.c optional scbus mmccam
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cam/mmc/mmc_sim.c optional scbus mmccam
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cam/mmc/mmc_sim_if.m optional scbus mmccam
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cam/mmc/mmc_da.c optional scbus mmccam da
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cam/scsi/scsi_da.c optional da
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cam/scsi/scsi_pass.c optional pass
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