ddfc9c4c59
Now that the upper layers all go through a layer to tie into these
information functions that translates an sbuf into char * and len. The
current interface suffers issues of what to do in cases of truncation,
etc. Instead, migrate all these functions to using struct sbuf and these
issues go away. The caller is also in charge of any memory allocation
and/or expansion that's needed during this process.
Create a bus_generic_child_{pnpinfo,location} and make it default. It
just returns success. This is for those busses that have no information
for these items. Migrate the now-empty routines to using this as
appropriate.
Document these new interfaces with man pages, and oversight from before.
Reviewed by: jhb, bcr
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D29937
156 lines
4.4 KiB
C
156 lines
4.4 KiB
C
/*
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* Copyright (c) 2017 Semihalf.
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* Copyright (c) 2017 Stormshield.
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* All rights reserved.
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/stdint.h>
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#include <sys/stddef.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/module.h>
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#include <sys/sysctl.h>
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#include <sys/rman.h>
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#include <sys/unistd.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/ahci/ahci.h>
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#define AHCI_VENDOR_SPECIFIC_0_ADDR 0xa0
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#define AHCI_VENDOR_SPECIFIC_0_DATA 0xa4
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#define AHCI_HC_DEVSTR "Marvell AHCI Controller"
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#define AHCI_HC_VENDOR "Marvell"
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static device_attach_t ahci_mv_fdt_attach;
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static struct ofw_compat_data compatible_data[] = {
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{"marvell,armada-380-ahci", true},
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{NULL, false}
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};
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static void
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ahci_mv_regret_config(struct ahci_controller *ctlr)
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{
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/*
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* Enable the regret bit to allow the SATA unit to regret
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* a request that didn't receive an acknowledge
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* and a avoid deadlock
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*/
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ATA_OUTL(ctlr->r_mem, AHCI_VENDOR_SPECIFIC_0_ADDR, 0x4);
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ATA_OUTL(ctlr->r_mem, AHCI_VENDOR_SPECIFIC_0_DATA, 0x80);
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}
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static int
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ahci_mv_fdt_probe(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (!ofw_bus_search_compatible(dev, compatible_data)->ocd_data)
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return (ENXIO);
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device_set_desc(dev, AHCI_HC_DEVSTR);
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return (BUS_PROBE_DEFAULT);
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}
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static int
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ahci_mv_fdt_attach(device_t dev)
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{
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struct ahci_controller *ctlr;
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int rc;
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ctlr = device_get_softc(dev);
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ctlr->dev = dev;
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ctlr->r_rid = 0;
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ctlr->quirks = AHCI_Q_2CH;
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ctlr->numirqs = 1;
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if (ofw_bus_is_compatible(dev, "marvell,armada-380-ahci"))
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ctlr->quirks |= AHCI_Q_MRVL_SR_DEL;
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/* Allocate memory for controller */
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ctlr->r_mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
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&ctlr->r_rid, RF_ACTIVE | RF_SHAREABLE);
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if (ctlr->r_mem == NULL) {
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device_printf(dev, "Failed to alloc memory for controller\n");
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return (ENOMEM);
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}
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/* Reset controller */
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rc = ahci_ctlr_reset(dev);
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if (rc != 0) {
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device_printf(dev, "Failed to reset controller\n");
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bus_release_resource(dev, SYS_RES_MEMORY, ctlr->r_rid, ctlr->r_mem);
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return (ENXIO);
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}
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ahci_mv_regret_config(ctlr);
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rc = ahci_attach(dev);
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if (rc != 0) {
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device_printf(dev, "Failed to initialize AHCI, with error %d\n", rc);
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return (ENXIO);
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}
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return (0);
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}
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static device_method_t ahci_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, ahci_mv_fdt_probe),
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DEVMETHOD(device_attach, ahci_mv_fdt_attach),
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DEVMETHOD(device_detach, ahci_detach),
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DEVMETHOD(bus_alloc_resource, ahci_alloc_resource),
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DEVMETHOD(bus_release_resource, ahci_release_resource),
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DEVMETHOD(bus_setup_intr, ahci_setup_intr),
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DEVMETHOD(bus_teardown_intr, ahci_teardown_intr),
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DEVMETHOD(bus_print_child, ahci_print_child),
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DEVMETHOD(bus_child_location, ahci_child_location),
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DEVMETHOD(bus_get_dma_tag, ahci_get_dma_tag),
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DEVMETHOD_END
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};
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static driver_t ahci_driver = {
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"ahci",
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ahci_methods,
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sizeof(struct ahci_controller)
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};
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DRIVER_MODULE(ahci_mv, simplebus, ahci_driver, ahci_devclass, NULL, NULL);
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DRIVER_MODULE(ahci_mv, ofwbus, ahci_driver, ahci_devclass, NULL, NULL);
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