06c9ee053d
the BAR after parsing the CIS. This forces the resource range to be reallocated if the BAR is reused by the device. Submitted by: deischen Reviewed by: imp Approved by: re (kib)
653 lines
19 KiB
C
653 lines
19 KiB
C
/*-
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* Copyright (c) 2005-2008, M. Warner Losh
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* Copyright (c) 2000,2001 Jonathan Chen.
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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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/*
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* CIS Handling for the Cardbus Bus
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*/
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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/malloc.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include <sys/endian.h>
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#include <sys/pciio.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pccard/pccardvar.h>
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#include <dev/pccard/pccard_cis.h>
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#include <dev/cardbus/cardbusreg.h>
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#include <dev/cardbus/cardbusvar.h>
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#include <dev/cardbus/cardbus_cis.h>
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extern int cardbus_cis_debug;
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#define DPRINTF(a) if (cardbus_cis_debug) printf a
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#define DEVPRINTF(x) if (cardbus_cis_debug) device_printf x
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#define CIS_CONFIG_SPACE (struct resource *)~0UL
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static int decode_tuple_generic(device_t cbdev, device_t child, int id,
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int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
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struct tuple_callbacks *info, void *);
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static int decode_tuple_linktarget(device_t cbdev, device_t child, int id,
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int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
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struct tuple_callbacks *info, void *);
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static int decode_tuple_vers_1(device_t cbdev, device_t child, int id,
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int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
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struct tuple_callbacks *info, void *);
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static int decode_tuple_funcid(device_t cbdev, device_t child, int id,
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int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
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struct tuple_callbacks *info, void *);
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static int decode_tuple_manfid(device_t cbdev, device_t child, int id,
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int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
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struct tuple_callbacks *info, void *);
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static int decode_tuple_funce(device_t cbdev, device_t child, int id,
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int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
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struct tuple_callbacks *info, void *);
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static int decode_tuple_bar(device_t cbdev, device_t child, int id,
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int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
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struct tuple_callbacks *info, void *);
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static int decode_tuple_unhandled(device_t cbdev, device_t child, int id,
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int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
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struct tuple_callbacks *info, void *);
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static int decode_tuple_end(device_t cbdev, device_t child, int id,
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int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
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struct tuple_callbacks *info, void *);
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static int cardbus_read_tuple_conf(device_t cbdev, device_t child,
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uint32_t start, uint32_t *off, int *tupleid, int *len,
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uint8_t *tupledata);
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static int cardbus_read_tuple_mem(device_t cbdev, struct resource *res,
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uint32_t start, uint32_t *off, int *tupleid, int *len,
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uint8_t *tupledata);
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static int cardbus_read_tuple(device_t cbdev, device_t child,
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struct resource *res, uint32_t start, uint32_t *off,
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int *tupleid, int *len, uint8_t *tupledata);
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static void cardbus_read_tuple_finish(device_t cbdev, device_t child,
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int rid, struct resource *res);
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static struct resource *cardbus_read_tuple_init(device_t cbdev, device_t child,
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uint32_t *start, int *rid);
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static int decode_tuple(device_t cbdev, device_t child, int tupleid,
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int len, uint8_t *tupledata, uint32_t start,
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uint32_t *off, struct tuple_callbacks *callbacks,
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void *);
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#define MAKETUPLE(NAME,FUNC) { CISTPL_ ## NAME, #NAME, decode_tuple_ ## FUNC }
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static char *funcnames[] = {
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"Multi-Functioned",
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"Memory",
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"Serial Port",
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"Parallel Port",
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"Fixed Disk",
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"Video Adaptor",
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"Network Adaptor",
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"AIMS",
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"SCSI",
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"Security"
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};
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/*
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* Handler functions for various CIS tuples
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*/
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static int
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decode_tuple_generic(device_t cbdev, device_t child, int id,
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int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
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struct tuple_callbacks *info, void *argp)
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{
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int i;
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if (cardbus_cis_debug) {
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if (info)
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printf("TUPLE: %s [%d]:", info->name, len);
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else
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printf("TUPLE: Unknown(0x%02x) [%d]:", id, len);
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for (i = 0; i < len; i++) {
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if (i % 0x10 == 0 && len > 0x10)
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printf("\n 0x%02x:", i);
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printf(" %02x", tupledata[i]);
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}
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printf("\n");
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}
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return (0);
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}
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static int
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decode_tuple_linktarget(device_t cbdev, device_t child, int id,
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int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
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struct tuple_callbacks *info, void *argp)
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{
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int i;
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if (cardbus_cis_debug) {
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printf("TUPLE: %s [%d]:", info->name, len);
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for (i = 0; i < len; i++) {
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if (i % 0x10 == 0 && len > 0x10)
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printf("\n 0x%02x:", i);
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printf(" %02x", tupledata[i]);
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}
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printf("\n");
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}
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if (len != 3 || tupledata[0] != 'C' || tupledata[1] != 'I' ||
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tupledata[2] != 'S') {
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printf("Invalid data for CIS Link Target!\n");
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decode_tuple_generic(cbdev, child, id, len, tupledata,
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start, off, info, argp);
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return (EINVAL);
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}
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return (0);
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}
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static int
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decode_tuple_vers_1(device_t cbdev, device_t child, int id,
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int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
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struct tuple_callbacks *info, void *argp)
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{
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int i;
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if (cardbus_cis_debug) {
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printf("Product version: %d.%d\n", tupledata[0], tupledata[1]);
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printf("Product name: ");
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for (i = 2; i < len; i++) {
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if (tupledata[i] == '\0')
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printf(" | ");
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else if (tupledata[i] == 0xff)
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break;
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else
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printf("%c", tupledata[i]);
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}
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printf("\n");
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}
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return (0);
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}
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static int
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decode_tuple_funcid(device_t cbdev, device_t child, int id,
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int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
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struct tuple_callbacks *info, void *argp)
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{
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struct cardbus_devinfo *dinfo = device_get_ivars(child);
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int numnames = sizeof(funcnames) / sizeof(funcnames[0]);
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int i;
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if (cardbus_cis_debug) {
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printf("Functions: ");
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for (i = 0; i < len; i++) {
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if (tupledata[i] < numnames)
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printf("%s", funcnames[tupledata[i]]);
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else
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printf("Unknown(%d)", tupledata[i]);
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if (i < len - 1)
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printf(", ");
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}
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printf("\n");
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}
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if (len > 0)
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dinfo->funcid = tupledata[0]; /* use first in list */
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return (0);
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}
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static int
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decode_tuple_manfid(device_t cbdev, device_t child, int id,
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int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
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struct tuple_callbacks *info, void *argp)
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{
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struct cardbus_devinfo *dinfo = device_get_ivars(child);
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int i;
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if (cardbus_cis_debug) {
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printf("Manufacturer ID: ");
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for (i = 0; i < len; i++)
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printf("%02x", tupledata[i]);
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printf("\n");
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}
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if (len == 5) {
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dinfo->mfrid = tupledata[1] | (tupledata[2] << 8);
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dinfo->prodid = tupledata[3] | (tupledata[4] << 8);
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}
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return (0);
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}
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static int
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decode_tuple_funce(device_t cbdev, device_t child, int id,
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int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
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struct tuple_callbacks *info, void *argp)
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{
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struct cardbus_devinfo *dinfo = device_get_ivars(child);
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int type, i;
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if (cardbus_cis_debug) {
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printf("Function Extension: ");
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for (i = 0; i < len; i++)
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printf("%02x", tupledata[i]);
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printf("\n");
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}
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if (len < 2) /* too short */
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return (0);
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type = tupledata[0]; /* XXX <32 always? */
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switch (dinfo->funcid) {
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case PCCARD_FUNCTION_NETWORK:
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switch (type) {
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case PCCARD_TPLFE_TYPE_LAN_NID:
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if (tupledata[1] > sizeof(dinfo->funce.lan.nid)) {
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/* ignore, warning? */
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return (0);
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}
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bcopy(tupledata + 2, dinfo->funce.lan.nid,
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tupledata[1]);
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break;
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}
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dinfo->fepresent |= 1<<type;
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break;
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}
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return (0);
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}
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static int
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decode_tuple_bar(device_t cbdev, device_t child, int id,
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int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
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struct tuple_callbacks *info, void *argp)
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{
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struct cardbus_devinfo *dinfo = device_get_ivars(child);
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int type;
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uint8_t reg;
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uint32_t bar;
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if (len != 6) {
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device_printf(cbdev, "CIS BAR length not 6 (%d)\n", len);
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return (EINVAL);
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}
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reg = *tupledata;
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len = le32toh(*(uint32_t*)(tupledata + 2));
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if (reg & TPL_BAR_REG_AS)
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type = SYS_RES_IOPORT;
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else
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type = SYS_RES_MEMORY;
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bar = reg & TPL_BAR_REG_ASI_MASK;
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if (bar == 0) {
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device_printf(cbdev, "Invalid BAR type 0 in CIS\n");
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return (EINVAL); /* XXX Return an error? */
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} else if (bar == 7) {
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/* XXX Should we try to map in Option ROMs? */
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return (0);
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}
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/* Convert from BAR type to BAR offset */
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bar = PCIR_BAR(bar - 1);
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if (type == SYS_RES_MEMORY) {
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if (reg & TPL_BAR_REG_PREFETCHABLE)
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dinfo->mprefetchable |= (1 << PCI_RID2BAR(bar));
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/*
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* The PC Card spec says we're only supposed to honor this
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* hint when the cardbus bridge is a child of pci0 (the main
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* bus). The PC Card spec seems to indicate that this should
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* only be done on x86 based machines, which suggests that on
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* non-x86 machines the addresses can be anywhere. Since the
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* hardware can do it on non-x86 machines, it should be able
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* to do it on x86 machines too. Therefore, we can and should
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* ignore this hint. Furthermore, the PC Card spec recommends
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* always allocating memory above 1MB, contradicting the other
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* part of the PC Card spec, it seems. We make note of it,
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* but otherwise don't use this information.
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*
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* Some Realtek cards have this set in their CIS, but fail
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* to actually work when mapped this way, and experience
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* has shown ignoring this big to be a wise choice.
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*
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* XXX We should cite chapter and verse for standard refs.
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*/
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if (reg & TPL_BAR_REG_BELOW1MB)
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dinfo->mbelow1mb |= (1 << PCI_RID2BAR(bar));
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}
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return (0);
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}
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static int
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decode_tuple_unhandled(device_t cbdev, device_t child, int id,
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int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
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struct tuple_callbacks *info, void *argp)
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{
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/* Make this message suck less XXX */
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printf("TUPLE: %s [%d] is unhandled! Bailing...", info->name, len);
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return (EINVAL);
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}
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static int
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decode_tuple_end(device_t cbdev, device_t child, int id,
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int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
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struct tuple_callbacks *info, void *argp)
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{
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if (cardbus_cis_debug)
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printf("CIS reading done\n");
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return (0);
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}
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/*
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* Functions to read the a tuple from the card
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*/
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/*
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* Read CIS bytes out of the config space. We have to read it 4 bytes at a
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* time and do the usual mask and shift to return the bytes. The standard
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* defines the byte order to be little endian. pci_read_config converts it to
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* host byte order. This is why we have no endian conversion functions: the
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* shifts wind up being endian neutral. This is also why we avoid the obvious
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* memcpy optimization.
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*/
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static int
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cardbus_read_tuple_conf(device_t cbdev, device_t child, uint32_t start,
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uint32_t *off, int *tupleid, int *len, uint8_t *tupledata)
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{
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int i, j;
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uint32_t e;
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uint32_t loc;
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loc = start + *off;
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e = pci_read_config(child, loc & ~0x3, 4);
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e >>= 8 * (loc & 0x3);
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*len = 0;
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for (i = loc, j = -2; j < *len; j++, i++) {
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if ((i & 0x3) == 0)
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e = pci_read_config(child, i, 4);
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if (j == -2)
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*tupleid = 0xff & e;
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else if (j == -1)
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*len = 0xff & e;
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else
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tupledata[j] = 0xff & e;
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e >>= 8;
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}
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*off += *len + 2;
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return (0);
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}
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/*
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* Read the CIS data out of memroy. We indirect through the bus space
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* routines to ensure proper byte ordering conversions when necessary.
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*/
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static int
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cardbus_read_tuple_mem(device_t cbdev, struct resource *res, uint32_t start,
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uint32_t *off, int *tupleid, int *len, uint8_t *tupledata)
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{
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int ret;
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*tupleid = bus_read_1(res, start + *off);
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*len = bus_read_1(res, start + *off + 1);
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bus_read_region_1(res, *off + start + 2, tupledata, *len);
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ret = 0;
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*off += *len + 2;
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return (ret);
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}
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static int
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cardbus_read_tuple(device_t cbdev, device_t child, struct resource *res,
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uint32_t start, uint32_t *off, int *tupleid, int *len,
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uint8_t *tupledata)
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{
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if (res == CIS_CONFIG_SPACE)
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return (cardbus_read_tuple_conf(cbdev, child, start, off,
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tupleid, len, tupledata));
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return (cardbus_read_tuple_mem(cbdev, res, start, off, tupleid, len,
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tupledata));
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}
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static void
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cardbus_read_tuple_finish(device_t cbdev, device_t child, int rid,
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struct resource *res)
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{
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if (res != CIS_CONFIG_SPACE) {
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bus_release_resource(child, SYS_RES_MEMORY, rid, res);
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bus_delete_resource(child, SYS_RES_MEMORY, rid);
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}
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}
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static struct resource *
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cardbus_read_tuple_init(device_t cbdev, device_t child, uint32_t *start,
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int *rid)
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{
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struct resource *res;
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uint32_t space;
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space = *start & PCIM_CIS_ASI_MASK;
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switch (space) {
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case PCIM_CIS_ASI_CONFIG:
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DEVPRINTF((cbdev, "CIS in PCI config space\n"));
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/* CIS in PCI config space need no initialization */
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return (CIS_CONFIG_SPACE);
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case PCIM_CIS_ASI_BAR0:
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case PCIM_CIS_ASI_BAR1:
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case PCIM_CIS_ASI_BAR2:
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case PCIM_CIS_ASI_BAR3:
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case PCIM_CIS_ASI_BAR4:
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case PCIM_CIS_ASI_BAR5:
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*rid = PCIR_BAR(space - PCIM_CIS_ASI_BAR0);
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|
DEVPRINTF((cbdev, "CIS in BAR %#x\n", *rid));
|
|
break;
|
|
case PCIM_CIS_ASI_ROM:
|
|
*rid = PCIR_BIOS;
|
|
DEVPRINTF((cbdev, "CIS in option rom\n"));
|
|
break;
|
|
default:
|
|
device_printf(cbdev, "Unable to read CIS: Unknown space: %d\n",
|
|
space);
|
|
return (NULL);
|
|
}
|
|
|
|
/* allocate the memory space to read CIS */
|
|
res = bus_alloc_resource_any(child, SYS_RES_MEMORY, rid,
|
|
rman_make_alignment_flags(4096) | RF_ACTIVE);
|
|
if (res == NULL) {
|
|
device_printf(cbdev, "Unable to allocate resource "
|
|
"to read CIS.\n");
|
|
return (NULL);
|
|
}
|
|
DEVPRINTF((cbdev, "CIS Mapped to %#lx\n", rman_get_start(res)));
|
|
|
|
/* Flip to the right ROM image if CIS is in ROM */
|
|
if (space == PCIM_CIS_ASI_ROM) {
|
|
uint32_t imagesize;
|
|
uint32_t imagebase = 0;
|
|
uint32_t pcidata;
|
|
uint16_t romsig;
|
|
int romnum = 0;
|
|
int imagenum;
|
|
|
|
imagenum = (*start & PCIM_CIS_ROM_MASK) >> 28;
|
|
for (romnum = 0;; romnum++) {
|
|
romsig = bus_read_2(res,
|
|
imagebase + CARDBUS_EXROM_SIGNATURE);
|
|
if (romsig != 0xaa55) {
|
|
device_printf(cbdev, "Bad header in rom %d: "
|
|
"[%x] %04x\n", romnum, imagebase +
|
|
CARDBUS_EXROM_SIGNATURE, romsig);
|
|
cardbus_read_tuple_finish(cbdev, child, *rid,
|
|
res);
|
|
*rid = 0;
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* If this was the Option ROM image that we were
|
|
* looking for, then we are done.
|
|
*/
|
|
if (romnum == imagenum)
|
|
break;
|
|
|
|
/* Find out where the next Option ROM image is */
|
|
pcidata = imagebase + bus_read_2(res,
|
|
imagebase + CARDBUS_EXROM_DATA_PTR);
|
|
imagesize = bus_read_2(res,
|
|
pcidata + CARDBUS_EXROM_DATA_IMAGE_LENGTH);
|
|
|
|
if (imagesize == 0) {
|
|
/*
|
|
* XXX some ROMs seem to have this as zero,
|
|
* can we assume this means 1 block?
|
|
*/
|
|
device_printf(cbdev, "Warning, size of Option "
|
|
"ROM image %d is 0 bytes, assuming 512 "
|
|
"bytes.\n", romnum);
|
|
imagesize = 1;
|
|
}
|
|
|
|
/* Image size is in 512 byte units */
|
|
imagesize <<= 9;
|
|
|
|
if ((bus_read_1(res, pcidata +
|
|
CARDBUS_EXROM_DATA_INDICATOR) & 0x80) != 0) {
|
|
device_printf(cbdev, "Cannot find CIS in "
|
|
"Option ROM\n");
|
|
cardbus_read_tuple_finish(cbdev, child, *rid,
|
|
res);
|
|
*rid = 0;
|
|
return (NULL);
|
|
}
|
|
imagebase += imagesize;
|
|
}
|
|
*start = imagebase + (*start & PCIM_CIS_ADDR_MASK);
|
|
} else {
|
|
*start = *start & PCIM_CIS_ADDR_MASK;
|
|
}
|
|
DEVPRINTF((cbdev, "CIS offset is %#x\n", *start));
|
|
|
|
return (res);
|
|
}
|
|
|
|
/*
|
|
* Dispatch the right handler function per tuple
|
|
*/
|
|
|
|
static int
|
|
decode_tuple(device_t cbdev, device_t child, int tupleid, int len,
|
|
uint8_t *tupledata, uint32_t start, uint32_t *off,
|
|
struct tuple_callbacks *callbacks, void *argp)
|
|
{
|
|
int i;
|
|
for (i = 0; callbacks[i].id != CISTPL_GENERIC; i++) {
|
|
if (tupleid == callbacks[i].id)
|
|
return (callbacks[i].func(cbdev, child, tupleid, len,
|
|
tupledata, start, off, &callbacks[i], argp));
|
|
}
|
|
return (callbacks[i].func(cbdev, child, tupleid, len,
|
|
tupledata, start, off, NULL, argp));
|
|
}
|
|
|
|
int
|
|
cardbus_parse_cis(device_t cbdev, device_t child,
|
|
struct tuple_callbacks *callbacks, void *argp)
|
|
{
|
|
uint8_t tupledata[MAXTUPLESIZE];
|
|
int tupleid = CISTPL_NULL;
|
|
int len;
|
|
int expect_linktarget;
|
|
uint32_t start, off;
|
|
struct resource *res;
|
|
int rid;
|
|
|
|
bzero(tupledata, MAXTUPLESIZE);
|
|
expect_linktarget = TRUE;
|
|
if ((start = pci_read_config(child, PCIR_CIS, 4)) == 0) {
|
|
DEVPRINTF((cbdev, "Warning: CIS pointer is 0: (no CIS)\n"));
|
|
return (0);
|
|
}
|
|
DEVPRINTF((cbdev, "CIS pointer is %#x\n", start));
|
|
off = 0;
|
|
res = cardbus_read_tuple_init(cbdev, child, &start, &rid);
|
|
if (res == NULL) {
|
|
device_printf(cbdev, "Unable to allocate resources for CIS\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
do {
|
|
if (cardbus_read_tuple(cbdev, child, res, start, &off,
|
|
&tupleid, &len, tupledata) != 0) {
|
|
device_printf(cbdev, "Failed to read CIS.\n");
|
|
cardbus_read_tuple_finish(cbdev, child, rid, res);
|
|
return (ENXIO);
|
|
}
|
|
|
|
if (expect_linktarget && tupleid != CISTPL_LINKTARGET) {
|
|
device_printf(cbdev, "Expecting link target, got 0x%x\n",
|
|
tupleid);
|
|
cardbus_read_tuple_finish(cbdev, child, rid, res);
|
|
return (EINVAL);
|
|
}
|
|
expect_linktarget = decode_tuple(cbdev, child, tupleid, len,
|
|
tupledata, start, &off, callbacks, argp);
|
|
if (expect_linktarget != 0) {
|
|
device_printf(cbdev, "Parsing failed with %d\n",
|
|
expect_linktarget);
|
|
cardbus_read_tuple_finish(cbdev, child, rid, res);
|
|
return (expect_linktarget);
|
|
}
|
|
} while (tupleid != CISTPL_END);
|
|
cardbus_read_tuple_finish(cbdev, child, rid, res);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
cardbus_do_cis(device_t cbdev, device_t child)
|
|
{
|
|
struct tuple_callbacks init_callbacks[] = {
|
|
MAKETUPLE(LONGLINK_CB, unhandled),
|
|
MAKETUPLE(INDIRECT, unhandled),
|
|
MAKETUPLE(LONGLINK_MFC, unhandled),
|
|
MAKETUPLE(BAR, bar),
|
|
MAKETUPLE(LONGLINK_A, unhandled),
|
|
MAKETUPLE(LONGLINK_C, unhandled),
|
|
MAKETUPLE(LINKTARGET, linktarget),
|
|
MAKETUPLE(VERS_1, vers_1),
|
|
MAKETUPLE(MANFID, manfid),
|
|
MAKETUPLE(FUNCID, funcid),
|
|
MAKETUPLE(FUNCE, funce),
|
|
MAKETUPLE(END, end),
|
|
MAKETUPLE(GENERIC, generic),
|
|
};
|
|
|
|
return (cardbus_parse_cis(cbdev, child, init_callbacks, NULL));
|
|
}
|