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/*-
* Copyright (c) 2005-2008, M. Warner Losh
* Copyright (c) 2000,2001 Jonathan Chen.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/cardbus/cardbus_cis.c 225515 2011-09-12 15:21:52Z jhb $");
/*
* CIS Handling for the Cardbus Bus
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <sys/endian.h>
#include <sys/pciio.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pccard/pccardvar.h>
#include <dev/pccard/pccard_cis.h>
#include <dev/cardbus/cardbusreg.h>
#include <dev/cardbus/cardbusvar.h>
#include <dev/cardbus/cardbus_cis.h>
extern int cardbus_cis_debug;
#define DPRINTF(a) if (cardbus_cis_debug) printf a
#define DEVPRINTF(x) if (cardbus_cis_debug) device_printf x
#define CIS_CONFIG_SPACE (struct resource *)~0UL
static int decode_tuple_generic(device_t cbdev, device_t child, int id,
int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
struct tuple_callbacks *info, void *);
static int decode_tuple_linktarget(device_t cbdev, device_t child, int id,
int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
struct tuple_callbacks *info, void *);
static int decode_tuple_vers_1(device_t cbdev, device_t child, int id,
int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
struct tuple_callbacks *info, void *);
static int decode_tuple_funcid(device_t cbdev, device_t child, int id,
int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
struct tuple_callbacks *info, void *);
static int decode_tuple_manfid(device_t cbdev, device_t child, int id,
int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
struct tuple_callbacks *info, void *);
static int decode_tuple_funce(device_t cbdev, device_t child, int id,
int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
struct tuple_callbacks *info, void *);
static int decode_tuple_bar(device_t cbdev, device_t child, int id,
int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
struct tuple_callbacks *info, void *);
static int decode_tuple_unhandled(device_t cbdev, device_t child, int id,
int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
struct tuple_callbacks *info, void *);
static int decode_tuple_end(device_t cbdev, device_t child, int id,
int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
struct tuple_callbacks *info, void *);
static int cardbus_read_tuple_conf(device_t cbdev, device_t child,
uint32_t start, uint32_t *off, int *tupleid, int *len,
uint8_t *tupledata);
static int cardbus_read_tuple_mem(device_t cbdev, struct resource *res,
uint32_t start, uint32_t *off, int *tupleid, int *len,
uint8_t *tupledata);
static int cardbus_read_tuple(device_t cbdev, device_t child,
struct resource *res, uint32_t start, uint32_t *off,
int *tupleid, int *len, uint8_t *tupledata);
static void cardbus_read_tuple_finish(device_t cbdev, device_t child,
int rid, struct resource *res);
static struct resource *cardbus_read_tuple_init(device_t cbdev, device_t child,
uint32_t *start, int *rid);
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 *);
#define MAKETUPLE(NAME,FUNC) { CISTPL_ ## NAME, #NAME, decode_tuple_ ## FUNC }
static char *funcnames[] = {
"Multi-Functioned",
"Memory",
"Serial Port",
"Parallel Port",
"Fixed Disk",
"Video Adaptor",
"Network Adaptor",
"AIMS",
"SCSI",
"Security"
};
/*
* Handler functions for various CIS tuples
*/
static int
decode_tuple_generic(device_t cbdev, device_t child, int id,
int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
struct tuple_callbacks *info, void *argp)
{
int i;
if (cardbus_cis_debug) {
if (info)
printf("TUPLE: %s [%d]:", info->name, len);
else
printf("TUPLE: Unknown(0x%02x) [%d]:", id, len);
for (i = 0; i < len; i++) {
if (i % 0x10 == 0 && len > 0x10)
printf("\n 0x%02x:", i);
printf(" %02x", tupledata[i]);
}
printf("\n");
}
return (0);
}
static int
decode_tuple_linktarget(device_t cbdev, device_t child, int id,
int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
struct tuple_callbacks *info, void *argp)
{
int i;
if (cardbus_cis_debug) {
printf("TUPLE: %s [%d]:", info->name, len);
for (i = 0; i < len; i++) {
if (i % 0x10 == 0 && len > 0x10)
printf("\n 0x%02x:", i);
printf(" %02x", tupledata[i]);
}
printf("\n");
}
if (len != 3 || tupledata[0] != 'C' || tupledata[1] != 'I' ||
tupledata[2] != 'S') {
printf("Invalid data for CIS Link Target!\n");
decode_tuple_generic(cbdev, child, id, len, tupledata,
start, off, info, argp);
return (EINVAL);
}
return (0);
}
static int
decode_tuple_vers_1(device_t cbdev, device_t child, int id,
int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
struct tuple_callbacks *info, void *argp)
{
int i;
if (cardbus_cis_debug) {
printf("Product version: %d.%d\n", tupledata[0], tupledata[1]);
printf("Product name: ");
for (i = 2; i < len; i++) {
if (tupledata[i] == '\0')
printf(" | ");
else if (tupledata[i] == 0xff)
break;
else
printf("%c", tupledata[i]);
}
printf("\n");
}
return (0);
}
static int
decode_tuple_funcid(device_t cbdev, device_t child, int id,
int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
struct tuple_callbacks *info, void *argp)
{
struct cardbus_devinfo *dinfo = device_get_ivars(child);
int numnames = sizeof(funcnames) / sizeof(funcnames[0]);
int i;
if (cardbus_cis_debug) {
printf("Functions: ");
for (i = 0; i < len; i++) {
if (tupledata[i] < numnames)
printf("%s", funcnames[tupledata[i]]);
else
printf("Unknown(%d)", tupledata[i]);
if (i < len - 1)
printf(", ");
}
printf("\n");
}
if (len > 0)
dinfo->funcid = tupledata[0]; /* use first in list */
return (0);
}
static int
decode_tuple_manfid(device_t cbdev, device_t child, int id,
int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
struct tuple_callbacks *info, void *argp)
{
struct cardbus_devinfo *dinfo = device_get_ivars(child);
int i;
if (cardbus_cis_debug) {
printf("Manufacturer ID: ");
for (i = 0; i < len; i++)
printf("%02x", tupledata[i]);
printf("\n");
}
if (len == 5) {
dinfo->mfrid = tupledata[1] | (tupledata[2] << 8);
dinfo->prodid = tupledata[3] | (tupledata[4] << 8);
}
return (0);
}
static int
decode_tuple_funce(device_t cbdev, device_t child, int id,
int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
struct tuple_callbacks *info, void *argp)
{
struct cardbus_devinfo *dinfo = device_get_ivars(child);
int type, i;
if (cardbus_cis_debug) {
printf("Function Extension: ");
for (i = 0; i < len; i++)
printf("%02x", tupledata[i]);
printf("\n");
}
if (len < 2) /* too short */
return (0);
type = tupledata[0]; /* XXX <32 always? */
switch (dinfo->funcid) {
case PCCARD_FUNCTION_NETWORK:
switch (type) {
case PCCARD_TPLFE_TYPE_LAN_NID:
if (tupledata[1] > sizeof(dinfo->funce.lan.nid)) {
/* ignore, warning? */
return (0);
}
bcopy(tupledata + 2, dinfo->funce.lan.nid,
tupledata[1]);
break;
}
dinfo->fepresent |= 1<<type;
break;
}
return (0);
}
static int
decode_tuple_bar(device_t cbdev, device_t child, int id,
int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
struct tuple_callbacks *info, void *argp)
{
struct cardbus_devinfo *dinfo = device_get_ivars(child);
int type;
uint8_t reg;
uint32_t bar;
if (len != 6) {
device_printf(cbdev, "CIS BAR length not 6 (%d)\n", len);
return (EINVAL);
}
reg = *tupledata;
len = le32toh(*(uint32_t*)(tupledata + 2));
if (reg & TPL_BAR_REG_AS)
type = SYS_RES_IOPORT;
else
type = SYS_RES_MEMORY;
bar = reg & TPL_BAR_REG_ASI_MASK;
if (bar == 0) {
device_printf(cbdev, "Invalid BAR type 0 in CIS\n");
return (EINVAL); /* XXX Return an error? */
} else if (bar == 7) {
/* XXX Should we try to map in Option ROMs? */
return (0);
}
/* Convert from BAR type to BAR offset */
bar = PCIR_BAR(bar - 1);
if (type == SYS_RES_MEMORY) {
if (reg & TPL_BAR_REG_PREFETCHABLE)
dinfo->mprefetchable |= (1 << PCI_RID2BAR(bar));
/*
* The PC Card spec says we're only supposed to honor this
* hint when the cardbus bridge is a child of pci0 (the main
* bus). The PC Card spec seems to indicate that this should
* only be done on x86 based machines, which suggests that on
* non-x86 machines the addresses can be anywhere. Since the
* hardware can do it on non-x86 machines, it should be able
* to do it on x86 machines too. Therefore, we can and should
* ignore this hint. Furthermore, the PC Card spec recommends
* always allocating memory above 1MB, contradicting the other
* part of the PC Card spec, it seems. We make note of it,
* but otherwise don't use this information.
*
* Some Realtek cards have this set in their CIS, but fail
* to actually work when mapped this way, and experience
* has shown ignoring this big to be a wise choice.
*
* XXX We should cite chapter and verse for standard refs.
*/
if (reg & TPL_BAR_REG_BELOW1MB)
dinfo->mbelow1mb |= (1 << PCI_RID2BAR(bar));
}
return (0);
}
static int
decode_tuple_unhandled(device_t cbdev, device_t child, int id,
int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
struct tuple_callbacks *info, void *argp)
{
/* Make this message suck less XXX */
printf("TUPLE: %s [%d] is unhandled! Bailing...", info->name, len);
return (EINVAL);
}
static int
decode_tuple_end(device_t cbdev, device_t child, int id,
int len, uint8_t *tupledata, uint32_t start, uint32_t *off,
struct tuple_callbacks *info, void *argp)
{
if (cardbus_cis_debug)
printf("CIS reading done\n");
return (0);
}
/*
* Functions to read the a tuple from the card
*/
/*
* Read CIS bytes out of the config space. We have to read it 4 bytes at a
* time and do the usual mask and shift to return the bytes. The standard
* defines the byte order to be little endian. pci_read_config converts it to
* host byte order. This is why we have no endian conversion functions: the
* shifts wind up being endian neutral. This is also why we avoid the obvious
* memcpy optimization.
*/
static int
cardbus_read_tuple_conf(device_t cbdev, device_t child, uint32_t start,
uint32_t *off, int *tupleid, int *len, uint8_t *tupledata)
{
int i, j;
uint32_t e;
uint32_t loc;
loc = start + *off;
e = pci_read_config(child, loc & ~0x3, 4);
e >>= 8 * (loc & 0x3);
*len = 0;
for (i = loc, j = -2; j < *len; j++, i++) {
if ((i & 0x3) == 0)
e = pci_read_config(child, i, 4);
if (j == -2)
*tupleid = 0xff & e;
else if (j == -1)
*len = 0xff & e;
else
tupledata[j] = 0xff & e;
e >>= 8;
}
*off += *len + 2;
return (0);
}
/*
* Read the CIS data out of memroy. We indirect through the bus space
* routines to ensure proper byte ordering conversions when necessary.
*/
static int
cardbus_read_tuple_mem(device_t cbdev, struct resource *res, uint32_t start,
uint32_t *off, int *tupleid, int *len, uint8_t *tupledata)
{
int ret;
*tupleid = bus_read_1(res, start + *off);
*len = bus_read_1(res, start + *off + 1);
bus_read_region_1(res, *off + start + 2, tupledata, *len);
ret = 0;
*off += *len + 2;
return (ret);
}
static int
cardbus_read_tuple(device_t cbdev, device_t child, struct resource *res,
uint32_t start, uint32_t *off, int *tupleid, int *len,
uint8_t *tupledata)
{
if (res == CIS_CONFIG_SPACE)
return (cardbus_read_tuple_conf(cbdev, child, start, off,
tupleid, len, tupledata));
return (cardbus_read_tuple_mem(cbdev, res, start, off, tupleid, len,
tupledata));
}
static void
cardbus_read_tuple_finish(device_t cbdev, device_t child, int rid,
struct resource *res)
{
if (res != CIS_CONFIG_SPACE) {
bus_release_resource(child, SYS_RES_MEMORY, rid, res);
bus_delete_resource(child, SYS_RES_MEMORY, rid);
}
}
static struct resource *
cardbus_read_tuple_init(device_t cbdev, device_t child, uint32_t *start,
int *rid)
{
struct resource *res;
uint32_t space;
space = *start & PCIM_CIS_ASI_MASK;
switch (space) {
case PCIM_CIS_ASI_CONFIG:
DEVPRINTF((cbdev, "CIS in PCI config space\n"));
/* CIS in PCI config space need no initialization */
return (CIS_CONFIG_SPACE);
case PCIM_CIS_ASI_BAR0:
case PCIM_CIS_ASI_BAR1:
case PCIM_CIS_ASI_BAR2:
case PCIM_CIS_ASI_BAR3:
case PCIM_CIS_ASI_BAR4:
case PCIM_CIS_ASI_BAR5:
*rid = PCIR_BAR(space - PCIM_CIS_ASI_BAR0);
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));
}