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freebsd-dev/sys/dev/bhnd/bhnd_subr.c
Landon J. Fuller a225321fbc bhnd/bwn(4): Define a bhnd(4) softmodem device class for the v.90 modem 
codec core, and mark the core as unpopulated on all BCM4306 bwn(4) devices.

Sponsored by:	The FreeBSD Foundation
2018-01-19 22:43:08 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2015-2016 Landon Fuller <landon@landonf.org>
* Copyright (c) 2017 The FreeBSD Foundation
* All rights reserved.
*
* Portions of this software were developed by Landon Fuller
* under sponsorship from the FreeBSD Foundation.
*
* 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,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
* redistribution must be conditioned upon including a substantially
* similar Disclaimer requirement for further binary redistribution.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/refcount.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <dev/bhnd/siba/sibareg.h>
#include <dev/bhnd/cores/chipc/chipcreg.h>
#include "nvram/bhnd_nvram.h"
#include "bhnd_chipc_if.h"
#include "bhnd_nvram_if.h"
#include "bhnd_nvram_map.h"
#include "bhndreg.h"
#include "bhndvar.h"
#include "bhnd_private.h"
static void bhnd_service_registry_free_entry(
struct bhnd_service_entry *entry);
static int compare_ascending_probe_order(const void *lhs, const void *rhs);
static int compare_descending_probe_order(const void *lhs,
const void *rhs);
/* BHND core device description table. */
static const struct bhnd_core_desc {
uint16_t vendor;
uint16_t device;
bhnd_devclass_t class;
const char *desc;
} bhnd_core_descs[] = {
#define BHND_CDESC(_mfg, _cid, _cls, _desc) \
{ BHND_MFGID_ ## _mfg, BHND_COREID_ ## _cid, \
BHND_DEVCLASS_ ## _cls, _desc }
BHND_CDESC(BCM, CC, CC, "ChipCommon I/O Controller"),
BHND_CDESC(BCM, ILINE20, OTHER, "iLine20 HPNA"),
BHND_CDESC(BCM, SRAM, RAM, "SRAM"),
BHND_CDESC(BCM, SDRAM, RAM, "SDRAM"),
BHND_CDESC(BCM, PCI, PCI, "PCI Bridge"),
BHND_CDESC(BCM, MIPS, CPU, "BMIPS CPU"),
BHND_CDESC(BCM, ENET, ENET_MAC, "Fast Ethernet MAC"),
BHND_CDESC(BCM, V90_CODEC, SOFTMODEM, "V.90 SoftModem Codec"),
BHND_CDESC(BCM, USB, USB_DUAL, "USB 1.1 Device/Host Controller"),
BHND_CDESC(BCM, ADSL, OTHER, "ADSL Core"),
BHND_CDESC(BCM, ILINE100, OTHER, "iLine100 HPNA"),
BHND_CDESC(BCM, IPSEC, OTHER, "IPsec Accelerator"),
BHND_CDESC(BCM, UTOPIA, OTHER, "UTOPIA ATM Core"),
BHND_CDESC(BCM, PCMCIA, PCCARD, "PCMCIA Bridge"),
BHND_CDESC(BCM, SOCRAM, RAM, "Internal Memory"),
BHND_CDESC(BCM, MEMC, MEMC, "MEMC SDRAM Controller"),
BHND_CDESC(BCM, OFDM, OTHER, "OFDM PHY"),
BHND_CDESC(BCM, EXTIF, OTHER, "External Interface"),
BHND_CDESC(BCM, D11, WLAN, "802.11 MAC/PHY/Radio"),
BHND_CDESC(BCM, APHY, WLAN_PHY, "802.11a PHY"),
BHND_CDESC(BCM, BPHY, WLAN_PHY, "802.11b PHY"),
BHND_CDESC(BCM, GPHY, WLAN_PHY, "802.11g PHY"),
BHND_CDESC(BCM, MIPS33, CPU, "BMIPS33 CPU"),
BHND_CDESC(BCM, USB11H, USB_HOST, "USB 1.1 Host Controller"),
BHND_CDESC(BCM, USB11D, USB_DEV, "USB 1.1 Device Controller"),
BHND_CDESC(BCM, USB20H, USB_HOST, "USB 2.0 Host Controller"),
BHND_CDESC(BCM, USB20D, USB_DEV, "USB 2.0 Device Controller"),
BHND_CDESC(BCM, SDIOH, OTHER, "SDIO Host Controller"),
BHND_CDESC(BCM, ROBO, OTHER, "RoboSwitch"),
BHND_CDESC(BCM, ATA100, OTHER, "Parallel ATA Controller"),
BHND_CDESC(BCM, SATAXOR, OTHER, "SATA DMA/XOR Controller"),
BHND_CDESC(BCM, GIGETH, ENET_MAC, "Gigabit Ethernet MAC"),
BHND_CDESC(BCM, PCIE, PCIE, "PCIe Bridge"),
BHND_CDESC(BCM, NPHY, WLAN_PHY, "802.11n 2x2 PHY"),
BHND_CDESC(BCM, SRAMC, MEMC, "SRAM Controller"),
BHND_CDESC(BCM, MINIMAC, OTHER, "MINI MAC/PHY"),
BHND_CDESC(BCM, ARM11, CPU, "ARM1176 CPU"),
BHND_CDESC(BCM, ARM7S, CPU, "ARM7TDMI-S CPU"),
BHND_CDESC(BCM, LPPHY, WLAN_PHY, "802.11a/b/g PHY"),
BHND_CDESC(BCM, PMU, PMU, "PMU"),
BHND_CDESC(BCM, SSNPHY, WLAN_PHY, "802.11n Single-Stream PHY"),
BHND_CDESC(BCM, SDIOD, OTHER, "SDIO Device Core"),
BHND_CDESC(BCM, ARMCM3, CPU, "ARM Cortex-M3 CPU"),
BHND_CDESC(BCM, HTPHY, WLAN_PHY, "802.11n 4x4 PHY"),
BHND_CDESC(MIPS,MIPS74K, CPU, "MIPS74k CPU"),
BHND_CDESC(BCM, GMAC, ENET_MAC, "Gigabit MAC core"),
BHND_CDESC(BCM, DMEMC, MEMC, "DDR1/DDR2 Memory Controller"),
BHND_CDESC(BCM, PCIERC, OTHER, "PCIe Root Complex"),
BHND_CDESC(BCM, OCP, SOC_BRIDGE, "OCP to OCP Bridge"),
BHND_CDESC(BCM, SC, OTHER, "Shared Common Core"),
BHND_CDESC(BCM, AHB, SOC_BRIDGE, "OCP to AHB Bridge"),
BHND_CDESC(BCM, SPIH, OTHER, "SPI Host Controller"),
BHND_CDESC(BCM, I2S, OTHER, "I2S Digital Audio Interface"),
BHND_CDESC(BCM, DMEMS, MEMC, "SDR/DDR1 Memory Controller"),
BHND_CDESC(BCM, UBUS_SHIM, OTHER, "BCM6362/UBUS WLAN SHIM"),
BHND_CDESC(BCM, PCIE2, PCIE, "PCIe Bridge (Gen2)"),
BHND_CDESC(ARM, APB_BRIDGE, SOC_BRIDGE, "BP135 AMBA3 AXI to APB Bridge"),
BHND_CDESC(ARM, PL301, SOC_ROUTER, "PL301 AMBA3 Interconnect"),
BHND_CDESC(ARM, EROM, EROM, "PL366 Device Enumeration ROM"),
BHND_CDESC(ARM, OOB_ROUTER, OTHER, "PL367 OOB Interrupt Router"),
BHND_CDESC(ARM, AXI_UNMAPPED, OTHER, "Unmapped Address Ranges"),
BHND_CDESC(BCM, 4706_CC, CC, "ChipCommon I/O Controller"),
BHND_CDESC(BCM, NS_PCIE2, PCIE, "PCIe Bridge (Gen2)"),
BHND_CDESC(BCM, NS_DMA, OTHER, "DMA engine"),
BHND_CDESC(BCM, NS_SDIO, OTHER, "SDIO 3.0 Host Controller"),
BHND_CDESC(BCM, NS_USB20H, USB_HOST, "USB 2.0 Host Controller"),
BHND_CDESC(BCM, NS_USB30H, USB_HOST, "USB 3.0 Host Controller"),
BHND_CDESC(BCM, NS_A9JTAG, OTHER, "ARM Cortex A9 JTAG Interface"),
BHND_CDESC(BCM, NS_DDR23_MEMC, MEMC, "Denali DDR2/DD3 Memory Controller"),
BHND_CDESC(BCM, NS_ROM, NVRAM, "System ROM"),
BHND_CDESC(BCM, NS_NAND, NVRAM, "NAND Flash Controller"),
BHND_CDESC(BCM, NS_QSPI, NVRAM, "QSPI Flash Controller"),
BHND_CDESC(BCM, NS_CC_B, CC_B, "ChipCommon B Auxiliary I/O Controller"),
BHND_CDESC(BCM, 4706_SOCRAM, RAM, "Internal Memory"),
BHND_CDESC(BCM, IHOST_ARMCA9, CPU, "ARM Cortex A9 CPU"),
BHND_CDESC(BCM, 4706_GMAC_CMN, ENET, "Gigabit MAC (Common)"),
BHND_CDESC(BCM, 4706_GMAC, ENET_MAC, "Gigabit MAC"),
BHND_CDESC(BCM, AMEMC, MEMC, "Denali DDR1/DDR2 Memory Controller"),
#undef BHND_CDESC
/* Derived from inspection of the BCM4331 cores that provide PrimeCell
* IDs. Due to lack of documentation, the surmised device name/purpose
* provided here may be incorrect. */
{ BHND_MFGID_ARM, BHND_PRIMEID_EROM, BHND_DEVCLASS_OTHER,
"PL364 Device Enumeration ROM" },
{ BHND_MFGID_ARM, BHND_PRIMEID_SWRAP, BHND_DEVCLASS_OTHER,
"PL368 Device Management Interface" },
{ BHND_MFGID_ARM, BHND_PRIMEID_MWRAP, BHND_DEVCLASS_OTHER,
"PL369 Device Management Interface" },
{ 0, 0, 0, NULL }
};
static const struct bhnd_device_quirk bhnd_chipc_clkctl_quirks[];
static const struct bhnd_device_quirk bhnd_pcmcia_clkctl_quirks[];
/**
* Device table entries for core-specific CLKCTL quirk lookup.
*/
static const struct bhnd_device bhnd_clkctl_devices[] = {
BHND_DEVICE(BCM, CC, NULL, bhnd_chipc_clkctl_quirks),
BHND_DEVICE(BCM, PCMCIA, NULL, bhnd_pcmcia_clkctl_quirks),
BHND_DEVICE_END,
};
/** ChipCommon CLKCTL quirks */
static const struct bhnd_device_quirk bhnd_chipc_clkctl_quirks[] = {
/* HTAVAIL/ALPAVAIL are bitswapped in chipc's CLKCTL */
BHND_CHIP_QUIRK(4328, HWREV_ANY, BHND_CLKCTL_QUIRK_CCS0),
BHND_CHIP_QUIRK(5354, HWREV_ANY, BHND_CLKCTL_QUIRK_CCS0),
BHND_DEVICE_QUIRK_END
};
/** PCMCIA CLKCTL quirks */
static const struct bhnd_device_quirk bhnd_pcmcia_clkctl_quirks[] = {
/* HTAVAIL/ALPAVAIL are bitswapped in pcmcia's CLKCTL */
BHND_CHIP_QUIRK(4328, HWREV_ANY, BHND_CLKCTL_QUIRK_CCS0),
BHND_CHIP_QUIRK(5354, HWREV_ANY, BHND_CLKCTL_QUIRK_CCS0),
BHND_DEVICE_QUIRK_END
};
/**
* Return the name for a given JEP106 manufacturer ID.
*
* @param vendor A JEP106 Manufacturer ID, including the non-standard ARM 4-bit
* JEP106 continuation code.
*/
const char *
bhnd_vendor_name(uint16_t vendor)
{
switch (vendor) {
case BHND_MFGID_ARM:
return "ARM";
case BHND_MFGID_BCM:
return "Broadcom";
case BHND_MFGID_MIPS:
return "MIPS";
default:
return "unknown";
}
}
/**
* Return the name of a port type.
*
* @param port_type The port type to look up.
*/
const char *
bhnd_port_type_name(bhnd_port_type port_type)
{
switch (port_type) {
case BHND_PORT_DEVICE:
return ("device");
case BHND_PORT_BRIDGE:
return ("bridge");
case BHND_PORT_AGENT:
return ("agent");
default:
return "unknown";
}
}
/**
* Return the name of an NVRAM source.
*
* @param nvram_src The NVRAM source type to look up.
*/
const char *
bhnd_nvram_src_name(bhnd_nvram_src nvram_src)
{
switch (nvram_src) {
case BHND_NVRAM_SRC_FLASH:
return ("flash");
case BHND_NVRAM_SRC_OTP:
return ("OTP");
case BHND_NVRAM_SRC_SPROM:
return ("SPROM");
case BHND_NVRAM_SRC_UNKNOWN:
return ("none");
default:
return ("unknown");
}
}
static const struct bhnd_core_desc *
bhnd_find_core_desc(uint16_t vendor, uint16_t device)
{
for (u_int i = 0; bhnd_core_descs[i].desc != NULL; i++) {
if (bhnd_core_descs[i].vendor != vendor)
continue;
if (bhnd_core_descs[i].device != device)
continue;
return (&bhnd_core_descs[i]);
}
return (NULL);
}
/**
* Return a human-readable name for a BHND core.
*
* @param vendor The core designer's JEDEC-106 Manufacturer ID.
* @param device The core identifier.
*/
const char *
bhnd_find_core_name(uint16_t vendor, uint16_t device)
{
const struct bhnd_core_desc *desc;
if ((desc = bhnd_find_core_desc(vendor, device)) == NULL)
return ("unknown");
return desc->desc;
}
/**
* Return the device class for a BHND core.
*
* @param vendor The core designer's JEDEC-106 Manufacturer ID.
* @param device The core identifier.
*/
bhnd_devclass_t
bhnd_find_core_class(uint16_t vendor, uint16_t device)
{
const struct bhnd_core_desc *desc;
if ((desc = bhnd_find_core_desc(vendor, device)) == NULL)
return (BHND_DEVCLASS_OTHER);
return desc->class;
}
/**
* Return a human-readable name for a BHND core.
*
* @param ci The core's info record.
*/
const char *
bhnd_core_name(const struct bhnd_core_info *ci)
{
return bhnd_find_core_name(ci->vendor, ci->device);
}
/**
* Return the device class for a BHND core.
*
* @param ci The core's info record.
*/
bhnd_devclass_t
bhnd_core_class(const struct bhnd_core_info *ci)
{
return bhnd_find_core_class(ci->vendor, ci->device);
}
/**
* Write a human readable name representation of the given
* BHND_CHIPID_* constant to @p buffer.
*
* @param buffer Output buffer, or NULL to compute the required size.
* @param size Capacity of @p buffer, in bytes.
* @param chip_id Chip ID to be formatted.
*
* @return The required number of bytes on success, or a negative integer on
* failure. No more than @p size-1 characters be written, with the @p size'th
* set to '\0'.
*
* @sa BHND_CHIPID_MAX_NAMELEN
*/
int
bhnd_format_chip_id(char *buffer, size_t size, uint16_t chip_id)
{
/* All hex formatted IDs are within the range of 0x4000-0x9C3F (40000-1) */
if (chip_id >= 0x4000 && chip_id <= 0x9C3F)
return (snprintf(buffer, size, "BCM%hX", chip_id));
else
return (snprintf(buffer, size, "BCM%hu", chip_id));
}
/**
* Return a core info record populated from a bhnd-attached @p dev.
*
* @param dev A bhnd device.
*
* @return A core info record for @p dev.
*/
struct bhnd_core_info
bhnd_get_core_info(device_t dev) {
return (struct bhnd_core_info) {
.vendor = bhnd_get_vendor(dev),
.device = bhnd_get_device(dev),
.hwrev = bhnd_get_hwrev(dev),
.core_idx = bhnd_get_core_index(dev),
.unit = bhnd_get_core_unit(dev)
};
}
/**
* Find a @p class child device with @p unit on @p bus.
*
* @param bus The bhnd-compatible bus to be searched.
* @param class The device class to match on.
* @param unit The core unit number; specify -1 to return the first match
* regardless of unit number.
*
* @retval device_t if a matching child device is found.
* @retval NULL if no matching child device is found.
*/
device_t
bhnd_bus_find_child(device_t bus, bhnd_devclass_t class, int unit)
{
struct bhnd_core_match md = {
BHND_MATCH_CORE_CLASS(class),
BHND_MATCH_CORE_UNIT(unit)
};
if (unit == -1)
md.m.match.core_unit = 0;
return bhnd_bus_match_child(bus, &md);
}
/**
* Find the first child device on @p bus that matches @p desc.
*
* @param bus The bhnd-compatible bus to be searched.
* @param desc A match descriptor.
*
* @retval device_t if a matching child device is found.
* @retval NULL if no matching child device is found.
*/
device_t
bhnd_bus_match_child(device_t bus, const struct bhnd_core_match *desc)
{
device_t *devlistp;
device_t match;
int devcnt;
int error;
error = device_get_children(bus, &devlistp, &devcnt);
if (error != 0)
return (NULL);
match = NULL;
for (int i = 0; i < devcnt; i++) {
struct bhnd_core_info ci = bhnd_get_core_info(devlistp[i]);
if (bhnd_core_matches(&ci, desc)) {
match = devlistp[i];
goto done;
}
}
done:
free(devlistp, M_TEMP);
return match;
}
/**
* Retrieve an ordered list of all device instances currently connected to
* @p bus, returning a pointer to the array in @p devlistp and the count
* in @p ndevs.
*
* The memory allocated for the table must be freed via
* bhnd_bus_free_children().
*
* @param bus The bhnd-compatible bus to be queried.
* @param[out] devlist The array of devices.
* @param[out] devcount The number of devices in @p devlistp
* @param order The order in which devices will be returned
* in @p devlist.
*
* @retval 0 success
* @retval non-zero if an error occurs, a regular unix error code will
* be returned.
*/
int
bhnd_bus_get_children(device_t bus, device_t **devlist, int *devcount,
bhnd_device_order order)
{
int error;
/* Fetch device array */
if ((error = device_get_children(bus, devlist, devcount)))
return (error);
/* Perform requested sorting */
if ((error = bhnd_sort_devices(*devlist, *devcount, order))) {
bhnd_bus_free_children(*devlist);
return (error);
}
return (0);
}
/**
* Free any memory allocated in a previous call to bhnd_bus_get_children().
*
* @param devlist The device array returned by bhnd_bus_get_children().
*/
void
bhnd_bus_free_children(device_t *devlist)
{
free(devlist, M_TEMP);
}
/**
* Perform in-place sorting of an array of bhnd device instances.
*
* @param devlist An array of bhnd devices.
* @param devcount The number of devices in @p devs.
* @param order The sort order to be used.
*
* @retval 0 success
* @retval EINVAL if the sort order is unknown.
*/
int
bhnd_sort_devices(device_t *devlist, size_t devcount, bhnd_device_order order)
{
int (*compare)(const void *, const void *);
switch (order) {
case BHND_DEVICE_ORDER_ATTACH:
compare = compare_ascending_probe_order;
break;
case BHND_DEVICE_ORDER_DETACH:
compare = compare_descending_probe_order;
break;
default:
printf("unknown sort order: %d\n", order);
return (EINVAL);
}
qsort(devlist, devcount, sizeof(*devlist), compare);
return (0);
}
/*
* Ascending comparison of bhnd device's probe order.
*/
static int
compare_ascending_probe_order(const void *lhs, const void *rhs)
{
device_t ldev, rdev;
int lorder, rorder;
ldev = (*(const device_t *) lhs);
rdev = (*(const device_t *) rhs);
lorder = BHND_BUS_GET_PROBE_ORDER(device_get_parent(ldev), ldev);
rorder = BHND_BUS_GET_PROBE_ORDER(device_get_parent(rdev), rdev);
if (lorder < rorder) {
return (-1);
} else if (lorder > rorder) {
return (1);
} else {
return (0);
}
}
/*
* Descending comparison of bhnd device's probe order.
*/
static int
compare_descending_probe_order(const void *lhs, const void *rhs)
{
return (compare_ascending_probe_order(rhs, lhs));
}
/**
* Call device_probe_and_attach() for each of the bhnd bus device's
* children, in bhnd attach order.
*
* @param bus The bhnd-compatible bus for which all children should be probed
* and attached.
*/
int
bhnd_bus_probe_children(device_t bus)
{
device_t *devs;
int ndevs;
int error;
/* Fetch children in attach order */
error = bhnd_bus_get_children(bus, &devs, &ndevs,
BHND_DEVICE_ORDER_ATTACH);
if (error)
return (error);
/* Probe and attach all children */
for (int i = 0; i < ndevs; i++) {
device_t child = devs[i];
device_probe_and_attach(child);
}
bhnd_bus_free_children(devs);
return (0);
}
/**
* Walk up the bhnd device hierarchy to locate the root device
* to which the bhndb bridge is attached.
*
* This can be used from within bhnd host bridge drivers to locate the
* actual upstream host device.
*
* @param dev A bhnd device.
* @param bus_class The expected bus (e.g. "pci") to which the bridge root
* should be attached.
*
* @retval device_t if a matching parent device is found.
* @retval NULL if @p dev is not attached via a bhndb bus.
* @retval NULL if no parent device is attached via @p bus_class.
*/
device_t
bhnd_find_bridge_root(device_t dev, devclass_t bus_class)
{
devclass_t bhndb_class;
device_t parent;
KASSERT(device_get_devclass(device_get_parent(dev)) == bhnd_devclass,
("%s not a bhnd device", device_get_nameunit(dev)));
bhndb_class = devclass_find("bhndb");
/* Walk the device tree until we hit a bridge */
parent = dev;
while ((parent = device_get_parent(parent)) != NULL) {
if (device_get_devclass(parent) == bhndb_class)
break;
}
/* No bridge? */
if (parent == NULL)
return (NULL);
/* Search for a parent attached to the expected bus class */
while ((parent = device_get_parent(parent)) != NULL) {
device_t bus;
bus = device_get_parent(parent);
if (bus != NULL && device_get_devclass(bus) == bus_class)
return (parent);
}
/* Not found */
return (NULL);
}
/**
* Find the first core in @p cores that matches @p desc.
*
* @param cores The table to search.
* @param num_cores The length of @p cores.
* @param desc A match descriptor.
*
* @retval bhnd_core_info if a matching core is found.
* @retval NULL if no matching core is found.
*/
const struct bhnd_core_info *
bhnd_match_core(const struct bhnd_core_info *cores, u_int num_cores,
const struct bhnd_core_match *desc)
{
for (u_int i = 0; i < num_cores; i++) {
if (bhnd_core_matches(&cores[i], desc))
return &cores[i];
}
return (NULL);
}
/**
* Find the first core in @p cores with the given @p class.
*
* @param cores The table to search.
* @param num_cores The length of @p cores.
* @param class The device class to match on.
*
* @retval non-NULL if a matching core is found.
* @retval NULL if no matching core is found.
*/
const struct bhnd_core_info *
bhnd_find_core(const struct bhnd_core_info *cores, u_int num_cores,
bhnd_devclass_t class)
{
struct bhnd_core_match md = {
BHND_MATCH_CORE_CLASS(class)
};
return bhnd_match_core(cores, num_cores, &md);
}
/**
* Create an equality match descriptor for @p core.
*
* @param core The core info to be matched on.
*
* @return an equality match descriptor for @p core.
*/
struct bhnd_core_match
bhnd_core_get_match_desc(const struct bhnd_core_info *core)
{
return ((struct bhnd_core_match) {
BHND_MATCH_CORE_VENDOR(core->vendor),
BHND_MATCH_CORE_ID(core->device),
BHND_MATCH_CORE_REV(HWREV_EQ(core->hwrev)),
BHND_MATCH_CORE_CLASS(bhnd_core_class(core)),
BHND_MATCH_CORE_IDX(core->core_idx),
BHND_MATCH_CORE_UNIT(core->unit)
});
}
/**
* Return true if the @p lhs is equal to @p rhs.
*
* @param lhs The first bhnd core descriptor to compare.
* @param rhs The second bhnd core descriptor to compare.
*
* @retval true if @p lhs is equal to @p rhs
* @retval false if @p lhs is not equal to @p rhs
*/
bool
bhnd_cores_equal(const struct bhnd_core_info *lhs,
const struct bhnd_core_info *rhs)
{
struct bhnd_core_match md;
/* Use an equality match descriptor to perform the comparison */
md = bhnd_core_get_match_desc(rhs);
return (bhnd_core_matches(lhs, &md));
}
/**
* Return true if the @p core matches @p desc.
*
* @param core A bhnd core descriptor.
* @param desc A match descriptor to compare against @p core.
*
* @retval true if @p core matches @p match.
* @retval false if @p core does not match @p match.
*/
bool
bhnd_core_matches(const struct bhnd_core_info *core,
const struct bhnd_core_match *desc)
{
if (desc->m.match.core_vendor && desc->core_vendor != core->vendor)
return (false);
if (desc->m.match.core_id && desc->core_id != core->device)
return (false);
if (desc->m.match.core_unit && desc->core_unit != core->unit)
return (false);
if (desc->m.match.core_rev &&
!bhnd_hwrev_matches(core->hwrev, &desc->core_rev))
return (false);
if (desc->m.match.core_idx && desc->core_idx != core->core_idx)
return (false);
if (desc->m.match.core_class &&
desc->core_class != bhnd_core_class(core))
return (false);
return true;
}
/**
* Return true if the @p chip matches @p desc.
*
* @param chip A bhnd chip identifier.
* @param desc A match descriptor to compare against @p chip.
*
* @retval true if @p chip matches @p match.
* @retval false if @p chip does not match @p match.
*/
bool
bhnd_chip_matches(const struct bhnd_chipid *chip,
const struct bhnd_chip_match *desc)
{
if (desc->m.match.chip_id && chip->chip_id != desc->chip_id)
return (false);
if (desc->m.match.chip_pkg && chip->chip_pkg != desc->chip_pkg)
return (false);
if (desc->m.match.chip_rev &&
!bhnd_hwrev_matches(chip->chip_rev, &desc->chip_rev))
return (false);
if (desc->m.match.chip_type && chip->chip_type != desc->chip_type)
return (false);
return (true);
}
/**
* Return true if the @p board matches @p desc.
*
* @param board The bhnd board info.
* @param desc A match descriptor to compare against @p board.
*
* @retval true if @p chip matches @p match.
* @retval false if @p chip does not match @p match.
*/
bool
bhnd_board_matches(const struct bhnd_board_info *board,
const struct bhnd_board_match *desc)
{
if (desc->m.match.board_srom_rev &&
!bhnd_hwrev_matches(board->board_srom_rev, &desc->board_srom_rev))
return (false);
if (desc->m.match.board_vendor &&
board->board_vendor != desc->board_vendor)
return (false);
if (desc->m.match.board_type && board->board_type != desc->board_type)
return (false);
if (desc->m.match.board_devid &&
board->board_devid != desc->board_devid)
return (false);
if (desc->m.match.board_rev &&
!bhnd_hwrev_matches(board->board_rev, &desc->board_rev))
return (false);
return (true);
}
/**
* Return true if the @p hwrev matches @p desc.
*
* @param hwrev A bhnd hardware revision.
* @param desc A match descriptor to compare against @p core.
*
* @retval true if @p hwrev matches @p match.
* @retval false if @p hwrev does not match @p match.
*/
bool
bhnd_hwrev_matches(uint16_t hwrev, const struct bhnd_hwrev_match *desc)
{
if (desc->start != BHND_HWREV_INVALID &&
desc->start > hwrev)
return false;
if (desc->end != BHND_HWREV_INVALID &&
desc->end < hwrev)
return false;
return true;
}
/**
* Return true if the @p dev matches @p desc.
*
* @param dev A bhnd device.
* @param desc A match descriptor to compare against @p dev.
*
* @retval true if @p dev matches @p match.
* @retval false if @p dev does not match @p match.
*/
bool
bhnd_device_matches(device_t dev, const struct bhnd_device_match *desc)
{
struct bhnd_core_info core;
const struct bhnd_chipid *chip;
struct bhnd_board_info board;
device_t parent;
int error;
/* Construct individual match descriptors */
struct bhnd_core_match m_core = { _BHND_CORE_MATCH_COPY(desc) };
struct bhnd_chip_match m_chip = { _BHND_CHIP_MATCH_COPY(desc) };
struct bhnd_board_match m_board = { _BHND_BOARD_MATCH_COPY(desc) };
/* Fetch and match core info */
if (m_core.m.match_flags) {
/* Only applicable to bhnd-attached cores */
parent = device_get_parent(dev);
if (device_get_devclass(parent) != bhnd_devclass) {
device_printf(dev, "attempting to match core "
"attributes against non-core device\n");
return (false);
}
core = bhnd_get_core_info(dev);
if (!bhnd_core_matches(&core, &m_core))
return (false);
}
/* Fetch and match chip info */
if (m_chip.m.match_flags) {
chip = bhnd_get_chipid(dev);
if (!bhnd_chip_matches(chip, &m_chip))
return (false);
}
/* Fetch and match board info.
*
* This is not available until after NVRAM is up; earlier device
* matches should not include board requirements */
if (m_board.m.match_flags) {
if ((error = bhnd_read_board_info(dev, &board))) {
device_printf(dev, "failed to read required board info "
"during device matching: %d\n", error);
return (false);
}
if (!bhnd_board_matches(&board, &m_board))
return (false);
}
/* All matched */
return (true);
}
/**
* Search @p table for an entry matching @p dev.
*
* @param dev A bhnd device to match against @p table.
* @param table The device table to search.
* @param entry_size The @p table entry size, in bytes.
*
* @retval non-NULL the first matching device, if any.
* @retval NULL if no matching device is found in @p table.
*/
const struct bhnd_device *
bhnd_device_lookup(device_t dev, const struct bhnd_device *table,
size_t entry_size)
{
const struct bhnd_device *entry;
device_t hostb, parent;
bhnd_attach_type attach_type;
uint32_t dflags;
parent = device_get_parent(dev);
hostb = bhnd_bus_find_hostb_device(parent);
attach_type = bhnd_get_attach_type(dev);
for (entry = table; !BHND_DEVICE_IS_END(entry); entry =
(const struct bhnd_device *) ((const char *) entry + entry_size))
{
/* match core info */
if (!bhnd_device_matches(dev, &entry->core))
continue;
/* match device flags */
dflags = entry->device_flags;
/* hostb implies BHND_ATTACH_ADAPTER requirement */
if (dflags & BHND_DF_HOSTB)
dflags |= BHND_DF_ADAPTER;
if (dflags & BHND_DF_ADAPTER)
if (attach_type != BHND_ATTACH_ADAPTER)
continue;
if (dflags & BHND_DF_HOSTB)
if (dev != hostb)
continue;
if (dflags & BHND_DF_SOC)
if (attach_type != BHND_ATTACH_NATIVE)
continue;
/* device found */
return (entry);
}
/* not found */
return (NULL);
}
/**
* Scan the device @p table for all quirk flags applicable to @p dev.
*
* @param dev A bhnd device to match against @p table.
* @param table The device table to search.
* @param entry_size The @p table entry size, in bytes.
*
* @return all matching quirk flags.
*/
uint32_t
bhnd_device_quirks(device_t dev, const struct bhnd_device *table,
size_t entry_size)
{
const struct bhnd_device *dent;
const struct bhnd_device_quirk *qent, *qtable;
uint32_t quirks;
/* Locate the device entry */
if ((dent = bhnd_device_lookup(dev, table, entry_size)) == NULL)
return (0);
/* Quirks table is optional */
qtable = dent->quirks_table;
if (qtable == NULL)
return (0);
/* Collect matching device quirk entries */
quirks = 0;
for (qent = qtable; !BHND_DEVICE_QUIRK_IS_END(qent); qent++) {
if (bhnd_device_matches(dev, &qent->desc))
quirks |= qent->quirks;
}
return (quirks);
}
/**
* Allocate bhnd(4) resources defined in @p rs from a parent bus.
*
* @param dev The device requesting ownership of the resources.
* @param rs A standard bus resource specification. This will be updated
* with the allocated resource's RIDs.
* @param res On success, the allocated bhnd resources.
*
* @retval 0 success
* @retval non-zero if allocation of any non-RF_OPTIONAL resource fails,
* all allocated resources will be released and a regular
* unix error code will be returned.
*/
int
bhnd_alloc_resources(device_t dev, struct resource_spec *rs,
struct bhnd_resource **res)
{
/* Initialize output array */
for (u_int i = 0; rs[i].type != -1; i++)
res[i] = NULL;
for (u_int i = 0; rs[i].type != -1; i++) {
res[i] = bhnd_alloc_resource_any(dev, rs[i].type, &rs[i].rid,
rs[i].flags);
/* Clean up all allocations on failure */
if (res[i] == NULL && !(rs[i].flags & RF_OPTIONAL)) {
bhnd_release_resources(dev, rs, res);
return (ENXIO);
}
}
return (0);
}
/**
* Release bhnd(4) resources defined in @p rs from a parent bus.
*
* @param dev The device that owns the resources.
* @param rs A standard bus resource specification previously initialized
* by @p bhnd_alloc_resources.
* @param res The bhnd resources to be released.
*/
void
bhnd_release_resources(device_t dev, const struct resource_spec *rs,
struct bhnd_resource **res)
{
for (u_int i = 0; rs[i].type != -1; i++) {
if (res[i] == NULL)
continue;
bhnd_release_resource(dev, rs[i].type, rs[i].rid, res[i]);
res[i] = NULL;
}
}
/**
* Parse the CHIPC_ID_* fields from the ChipCommon CHIPC_ID
* register, returning its bhnd_chipid representation.
*
* @param idreg The CHIPC_ID register value.
* @param enum_addr The enumeration address to include in the result.
*
* @warning
* On early siba(4) devices, the ChipCommon core does not provide
* a valid CHIPC_ID_NUMCORE field. On these ChipCommon revisions
* (see CHIPC_NCORES_MIN_HWREV()), this function will parse and return
* an invalid `ncores` value.
*/
struct bhnd_chipid
bhnd_parse_chipid(uint32_t idreg, bhnd_addr_t enum_addr)
{
struct bhnd_chipid result;
/* Fetch the basic chip info */
result.chip_id = CHIPC_GET_BITS(idreg, CHIPC_ID_CHIP);
result.chip_pkg = CHIPC_GET_BITS(idreg, CHIPC_ID_PKG);
result.chip_rev = CHIPC_GET_BITS(idreg, CHIPC_ID_REV);
result.chip_type = CHIPC_GET_BITS(idreg, CHIPC_ID_BUS);
result.ncores = CHIPC_GET_BITS(idreg, CHIPC_ID_NUMCORE);
result.enum_addr = enum_addr;
return (result);
}
/**
* Determine the correct core count for a chip identification value that
* may contain an invalid core count.
*
* On some early siba(4) devices (see CHIPC_NCORES_MIN_HWREV()), the ChipCommon
* core does not provide a valid CHIPC_ID_NUMCORE field.
*
* @param cid The chip identification to be queried.
* @param chipc_hwrev The hardware revision of the ChipCommon core from which
* @p cid was parsed.
* @param[out] ncores On success, will be set to the correct core count.
*
* @retval 0 If the core count is already correct, or was mapped to a
* a correct value.
* @retval EINVAL If the core count is incorrect, but the chip was not
* recognized.
*/
int
bhnd_chipid_fixed_ncores(const struct bhnd_chipid *cid, uint16_t chipc_hwrev,
uint8_t *ncores)
{
/* bcma(4), and most siba(4) devices */
if (CHIPC_NCORES_MIN_HWREV(chipc_hwrev)) {
*ncores = cid->ncores;
return (0);
}
/* broken siba(4) chipsets */
switch (cid->chip_id) {
case BHND_CHIPID_BCM4306:
*ncores = 6;
break;
case BHND_CHIPID_BCM4704:
*ncores = 9;
break;
case BHND_CHIPID_BCM5365:
/*
* BCM5365 does support ID_NUMCORE in at least
* some of its revisions, but for unknown
* reasons, Broadcom's drivers always exclude
* the ChipCommon revision (0x5) used by BCM5365
* from the set of revisions supporting
* ID_NUMCORE, and instead supply a fixed value.
*
* Presumably, at least some of these devices
* shipped with a broken ID_NUMCORE value.
*/
*ncores = 7;
break;
default:
return (EINVAL);
}
return (0);
}
/**
* Allocate the resource defined by @p rs via @p dev, use it
* to read the ChipCommon ID register relative to @p chipc_offset,
* then release the resource.
*
* @param dev The device owning @p rs.
* @param rs A resource spec that encompasses the ChipCommon register block.
* @param chipc_offset The offset of the ChipCommon registers within @p rs.
* @param[out] result The chip identification data.
*
* @retval 0 success
* @retval non-zero if the ChipCommon identification data could not be read.
*/
int
bhnd_read_chipid(device_t dev, struct resource_spec *rs,
bus_size_t chipc_offset, struct bhnd_chipid *result)
{
struct resource *res;
bhnd_addr_t enum_addr;
uint32_t reg;
uint8_t chip_type;
int error, rid, rtype;
rid = rs->rid;
rtype = rs->type;
error = 0;
/* Allocate the ChipCommon window resource and fetch the chipid data */
res = bus_alloc_resource_any(dev, rtype, &rid, RF_ACTIVE);
if (res == NULL) {
device_printf(dev,
"failed to allocate bhnd chipc resource\n");
return (ENXIO);
}
/* Fetch the basic chip info */
reg = bus_read_4(res, chipc_offset + CHIPC_ID);
chip_type = CHIPC_GET_BITS(reg, CHIPC_ID_BUS);
/* Fetch the EROMPTR */
if (BHND_CHIPTYPE_HAS_EROM(chip_type)) {
enum_addr = bus_read_4(res, chipc_offset + CHIPC_EROMPTR);
} else if (chip_type == BHND_CHIPTYPE_SIBA) {
/* siba(4) uses the ChipCommon base address as the enumeration
* address */
enum_addr = BHND_DEFAULT_CHIPC_ADDR;
} else {
device_printf(dev, "unknown chip type %hhu\n", chip_type);
error = ENODEV;
goto cleanup;
}
*result = bhnd_parse_chipid(reg, enum_addr);
/* Fix the core count on early siba(4) devices */
if (chip_type == BHND_CHIPTYPE_SIBA) {
uint32_t idh;
uint16_t chipc_hwrev;
/*
* We need the ChipCommon revision to determine whether
* the ncore field is valid.
*
* We can safely assume the siba IDHIGH register is mapped
* within the chipc register block.
*/
idh = bus_read_4(res, SB0_REG_ABS(SIBA_CFG0_IDHIGH));
chipc_hwrev = SIBA_IDH_CORE_REV(idh);
error = bhnd_chipid_fixed_ncores(result, chipc_hwrev,
&result->ncores);
if (error)
goto cleanup;
}
cleanup:
/* Clean up */
bus_release_resource(dev, rtype, rid, res);
return (error);
}
/**
* Allocate and return a new per-core PMU clock control/status (clkctl)
* instance for @p dev.
*
* @param dev The bhnd(4) core device mapped by @p r.
* @param pmu_dev The bhnd(4) PMU device, implmenting the bhnd_pmu_if
* interface. The caller is responsible for ensuring that
* this reference remains valid for the lifetime of the
* returned clkctl instance.
* @param r A resource mapping the core's clock control register
* (see BHND_CLK_CTL_ST). The caller is responsible for
* ensuring that this resource remains valid for the
* lifetime of the returned clkctl instance.
* @param offset The offset to the clock control register within @p r.
* @param max_latency The PMU's maximum state transition latency in
* microseconds; this upper bound will be used to busy-wait
* on PMU state transitions.
*
* @retval non-NULL success
* @retval NULL if allocation fails.
*
*/
struct bhnd_core_clkctl *
bhnd_alloc_core_clkctl(device_t dev, device_t pmu_dev, struct bhnd_resource *r,
bus_size_t offset, u_int max_latency)
{
struct bhnd_core_clkctl *clkctl;
clkctl = malloc(sizeof(*clkctl), M_BHND, M_ZERO | M_NOWAIT);
if (clkctl == NULL)
return (NULL);
clkctl->cc_dev = dev;
clkctl->cc_pmu_dev = pmu_dev;
clkctl->cc_res = r;
clkctl->cc_res_offset = offset;
clkctl->cc_max_latency = max_latency;
clkctl->cc_quirks = bhnd_device_quirks(dev, bhnd_clkctl_devices,
sizeof(bhnd_clkctl_devices[0]));
BHND_CLKCTL_LOCK_INIT(clkctl);
return (clkctl);
}
/**
* Free a clkctl instance previously allocated via bhnd_alloc_core_clkctl().
*
* @param clkctl The clkctl instance to be freed.
*/
void
bhnd_free_core_clkctl(struct bhnd_core_clkctl *clkctl)
{
BHND_CLKCTL_LOCK_DESTROY(clkctl);
free(clkctl, M_BHND);
}
/**
* Wait for the per-core clock status to be equal to @p value after
* applying @p mask, timing out after the maximum transition latency is reached.
*
* @param clkctl Per-core clkctl state to be queryied.
* @param value Value to wait for.
* @param mask Mask to apply prior to value comparison.
*
* @retval 0 success
* @retval ETIMEDOUT if the PMU's maximum transition delay is reached before
* the clock status matches @p value and @p mask.
*/
int
bhnd_core_clkctl_wait(struct bhnd_core_clkctl *clkctl, uint32_t value,
uint32_t mask)
{
uint32_t clkst;
BHND_CLKCTL_LOCK_ASSERT(clkctl, MA_OWNED);
/* Bitswapped HTAVAIL/ALPAVAIL work-around */
if (clkctl->cc_quirks & BHND_CLKCTL_QUIRK_CCS0) {
uint32_t fmask, fval;
fmask = mask & ~(BHND_CCS_HTAVAIL | BHND_CCS_ALPAVAIL);
fval = value & ~(BHND_CCS_HTAVAIL | BHND_CCS_ALPAVAIL);
if (mask & BHND_CCS_HTAVAIL)
fmask |= BHND_CCS0_HTAVAIL;
if (value & BHND_CCS_HTAVAIL)
fval |= BHND_CCS0_HTAVAIL;
if (mask & BHND_CCS_ALPAVAIL)
fmask |= BHND_CCS0_ALPAVAIL;
if (value & BHND_CCS_ALPAVAIL)
fval |= BHND_CCS0_ALPAVAIL;
mask = fmask;
value = fval;
}
for (u_int i = 0; i < clkctl->cc_max_latency; i += 10) {
clkst = bhnd_bus_read_4(clkctl->cc_res, clkctl->cc_res_offset);
if ((clkst & mask) == (value & mask))
return (0);
DELAY(10);
}
device_printf(clkctl->cc_dev, "clkst wait timeout (value=%#x, "
"mask=%#x)\n", value, mask);
return (ETIMEDOUT);
}
/**
* Read an NVRAM variable's NUL-terminated string value.
*
* @param dev A bhnd bus child device.
* @param name The NVRAM variable name.
* @param[out] buf A buffer large enough to hold @p len bytes. On
* success, the NUL-terminated string value will be
* written to this buffer. This argment may be NULL if
* the value is not desired.
* @param len The maximum capacity of @p buf.
* @param[out] rlen On success, will be set to the actual size of
* the requested value (including NUL termination). This
* argment may be NULL if the size is not desired.
*
* @retval 0 success
* @retval ENOENT The requested variable was not found.
* @retval ENODEV No valid NVRAM source could be found.
* @retval ENOMEM If @p buf is non-NULL and a buffer of @p len is too
* small to hold the requested value.
* @retval EFTYPE If the variable data cannot be coerced to a valid
* string representation.
* @retval ERANGE If value coercion would overflow @p type.
* @retval non-zero If reading @p name otherwise fails, a regular unix
* error code will be returned.
*/
int
bhnd_nvram_getvar_str(device_t dev, const char *name, char *buf, size_t len,
size_t *rlen)
{
size_t larg;
int error;
larg = len;
error = bhnd_nvram_getvar(dev, name, buf, &larg,
BHND_NVRAM_TYPE_STRING);
if (rlen != NULL)
*rlen = larg;
return (error);
}
/**
* Read an NVRAM variable's unsigned integer value.
*
* @param dev A bhnd bus child device.
* @param name The NVRAM variable name.
* @param[out] value On success, the requested value will be written
* to this pointer.
* @param width The output integer type width (1, 2, or
* 4 bytes).
*
* @retval 0 success
* @retval ENOENT The requested variable was not found.
* @retval ENODEV No valid NVRAM source could be found.
* @retval EFTYPE If the variable data cannot be coerced to a
* a valid unsigned integer representation.
* @retval ERANGE If value coercion would overflow (or underflow) an
* unsigned representation of the given @p width.
* @retval non-zero If reading @p name otherwise fails, a regular unix
* error code will be returned.
*/
int
bhnd_nvram_getvar_uint(device_t dev, const char *name, void *value, int width)
{
bhnd_nvram_type type;
size_t len;
switch (width) {
case 1:
type = BHND_NVRAM_TYPE_UINT8;
break;
case 2:
type = BHND_NVRAM_TYPE_UINT16;
break;
case 4:
type = BHND_NVRAM_TYPE_UINT32;
break;
default:
device_printf(dev, "unsupported NVRAM integer width: %d\n",
width);
return (EINVAL);
}
len = width;
return (bhnd_nvram_getvar(dev, name, value, &len, type));
}
/**
* Read an NVRAM variable's unsigned 8-bit integer value.
*
* @param dev A bhnd bus child device.
* @param name The NVRAM variable name.
* @param[out] value On success, the requested value will be written
* to this pointer.
*
* @retval 0 success
* @retval ENOENT The requested variable was not found.
* @retval ENODEV No valid NVRAM source could be found.
* @retval EFTYPE If the variable data cannot be coerced to a
* a valid unsigned integer representation.
* @retval ERANGE If value coercion would overflow (or underflow) uint8_t.
* @retval non-zero If reading @p name otherwise fails, a regular unix
* error code will be returned.
*/
int
bhnd_nvram_getvar_uint8(device_t dev, const char *name, uint8_t *value)
{
return (bhnd_nvram_getvar_uint(dev, name, value, sizeof(*value)));
}
/**
* Read an NVRAM variable's unsigned 16-bit integer value.
*
* @param dev A bhnd bus child device.
* @param name The NVRAM variable name.
* @param[out] value On success, the requested value will be written
* to this pointer.
*
* @retval 0 success
* @retval ENOENT The requested variable was not found.
* @retval ENODEV No valid NVRAM source could be found.
* @retval EFTYPE If the variable data cannot be coerced to a
* a valid unsigned integer representation.
* @retval ERANGE If value coercion would overflow (or underflow)
* uint16_t.
* @retval non-zero If reading @p name otherwise fails, a regular unix
* error code will be returned.
*/
int
bhnd_nvram_getvar_uint16(device_t dev, const char *name, uint16_t *value)
{
return (bhnd_nvram_getvar_uint(dev, name, value, sizeof(*value)));
}
/**
* Read an NVRAM variable's unsigned 32-bit integer value.
*
* @param dev A bhnd bus child device.
* @param name The NVRAM variable name.
* @param[out] value On success, the requested value will be written
* to this pointer.
*
* @retval 0 success
* @retval ENOENT The requested variable was not found.
* @retval ENODEV No valid NVRAM source could be found.
* @retval EFTYPE If the variable data cannot be coerced to a
* a valid unsigned integer representation.
* @retval ERANGE If value coercion would overflow (or underflow)
* uint32_t.
* @retval non-zero If reading @p name otherwise fails, a regular unix
* error code will be returned.
*/
int
bhnd_nvram_getvar_uint32(device_t dev, const char *name, uint32_t *value)
{
return (bhnd_nvram_getvar_uint(dev, name, value, sizeof(*value)));
}
/**
* Read an NVRAM variable's signed integer value.
*
* @param dev A bhnd bus child device.
* @param name The NVRAM variable name.
* @param[out] value On success, the requested value will be written
* to this pointer.
* @param width The output integer type width (1, 2, or
* 4 bytes).
*
* @retval 0 success
* @retval ENOENT The requested variable was not found.
* @retval ENODEV No valid NVRAM source could be found.
* @retval EFTYPE If the variable data cannot be coerced to a
* a valid integer representation.
* @retval ERANGE If value coercion would overflow (or underflow) an
* signed representation of the given @p width.
* @retval non-zero If reading @p name otherwise fails, a regular unix
* error code will be returned.
*/
int
bhnd_nvram_getvar_int(device_t dev, const char *name, void *value, int width)
{
bhnd_nvram_type type;
size_t len;
switch (width) {
case 1:
type = BHND_NVRAM_TYPE_INT8;
break;
case 2:
type = BHND_NVRAM_TYPE_INT16;
break;
case 4:
type = BHND_NVRAM_TYPE_INT32;
break;
default:
device_printf(dev, "unsupported NVRAM integer width: %d\n",
width);
return (EINVAL);
}
len = width;
return (bhnd_nvram_getvar(dev, name, value, &len, type));
}
/**
* Read an NVRAM variable's signed 8-bit integer value.
*
* @param dev A bhnd bus child device.
* @param name The NVRAM variable name.
* @param[out] value On success, the requested value will be written
* to this pointer.
*
* @retval 0 success
* @retval ENOENT The requested variable was not found.
* @retval ENODEV No valid NVRAM source could be found.
* @retval EFTYPE If the variable data cannot be coerced to a
* a valid integer representation.
* @retval ERANGE If value coercion would overflow (or underflow) int8_t.
* @retval non-zero If reading @p name otherwise fails, a regular unix
* error code will be returned.
*/
int
bhnd_nvram_getvar_int8(device_t dev, const char *name, int8_t *value)
{
return (bhnd_nvram_getvar_int(dev, name, value, sizeof(*value)));
}
/**
* Read an NVRAM variable's signed 16-bit integer value.
*
* @param dev A bhnd bus child device.
* @param name The NVRAM variable name.
* @param[out] value On success, the requested value will be written
* to this pointer.
*
* @retval 0 success
* @retval ENOENT The requested variable was not found.
* @retval ENODEV No valid NVRAM source could be found.
* @retval EFTYPE If the variable data cannot be coerced to a
* a valid integer representation.
* @retval ERANGE If value coercion would overflow (or underflow)
* int16_t.
* @retval non-zero If reading @p name otherwise fails, a regular unix
* error code will be returned.
*/
int
bhnd_nvram_getvar_int16(device_t dev, const char *name, int16_t *value)
{
return (bhnd_nvram_getvar_int(dev, name, value, sizeof(*value)));
}
/**
* Read an NVRAM variable's signed 32-bit integer value.
*
* @param dev A bhnd bus child device.
* @param name The NVRAM variable name.
* @param[out] value On success, the requested value will be written
* to this pointer.
*
* @retval 0 success
* @retval ENOENT The requested variable was not found.
* @retval ENODEV No valid NVRAM source could be found.
* @retval EFTYPE If the variable data cannot be coerced to a
* a valid integer representation.
* @retval ERANGE If value coercion would overflow (or underflow)
* int32_t.
* @retval non-zero If reading @p name otherwise fails, a regular unix
* error code will be returned.
*/
int
bhnd_nvram_getvar_int32(device_t dev, const char *name, int32_t *value)
{
return (bhnd_nvram_getvar_int(dev, name, value, sizeof(*value)));
}
/**
* Read an NVRAM variable's array value.
*
* @param dev A bhnd bus child device.
* @param name The NVRAM variable name.
* @param[out] buf A buffer large enough to hold @p size bytes.
* On success, the requested value will be written
* to this buffer.
* @param[in,out] size The required number of bytes to write to
* @p buf.
* @param type The desired array element data representation.
*
* @retval 0 success
* @retval ENOENT The requested variable was not found.
* @retval ENODEV No valid NVRAM source could be found.
* @retval ENXIO If less than @p size bytes are available.
* @retval ENOMEM If a buffer of @p size is too small to hold the
* requested value.
* @retval EFTYPE If the variable data cannot be coerced to a
* a valid instance of @p type.
* @retval ERANGE If value coercion would overflow (or underflow) a
* representation of @p type.
* @retval non-zero If reading @p name otherwise fails, a regular unix
* error code will be returned.
*/
int
bhnd_nvram_getvar_array(device_t dev, const char *name, void *buf, size_t size,
bhnd_nvram_type type)
{
size_t nbytes;
int error;
/* Attempt read */
nbytes = size;
if ((error = bhnd_nvram_getvar(dev, name, buf, &nbytes, type)))
return (error);
/* Verify that the expected number of bytes were fetched */
if (nbytes < size)
return (ENXIO);
return (0);
}
/**
* Initialize a service provider registry.
*
* @param bsr The service registry to initialize.
*
* @retval 0 success
* @retval non-zero if an error occurs initializing the service registry,
* a regular unix error code will be returned.
*/
int
bhnd_service_registry_init(struct bhnd_service_registry *bsr)
{
STAILQ_INIT(&bsr->entries);
mtx_init(&bsr->lock, "bhnd_service_registry lock", NULL, MTX_DEF);
return (0);
}
/**
* Release all resources held by @p bsr.
*
* @param bsr A service registry instance previously successfully
* initialized via bhnd_service_registry_init().
*
* @retval 0 success
* @retval EBUSY if active references to service providers registered
* with @p bsr exist.
*/
int
bhnd_service_registry_fini(struct bhnd_service_registry *bsr)
{
struct bhnd_service_entry *entry, *enext;
/* Remove everthing we can */
mtx_lock(&bsr->lock);
STAILQ_FOREACH_SAFE(entry, &bsr->entries, link, enext) {
if (entry->refs > 0)
continue;
STAILQ_REMOVE(&bsr->entries, entry, bhnd_service_entry, link);
free(entry, M_BHND);
}
if (!STAILQ_EMPTY(&bsr->entries)) {
mtx_unlock(&bsr->lock);
return (EBUSY);
}
mtx_unlock(&bsr->lock);
mtx_destroy(&bsr->lock);
return (0);
}
/**
* Register a @p provider for the given @p service.
*
* @param bsr Service registry to be modified.
* @param provider Service provider to register.
* @param service Service for which @p provider will be registered.
* @param flags Service provider flags (see BHND_SPF_*).
*
* @retval 0 success
* @retval EEXIST if an entry for @p service already exists.
* @retval EINVAL if @p service is BHND_SERVICE_ANY.
* @retval non-zero if registering @p provider otherwise fails, a regular
* unix error code will be returned.
*/
int
bhnd_service_registry_add(struct bhnd_service_registry *bsr, device_t provider,
bhnd_service_t service, uint32_t flags)
{
struct bhnd_service_entry *entry;
if (service == BHND_SERVICE_ANY)
return (EINVAL);
mtx_lock(&bsr->lock);
/* Is a service provider already registered? */
STAILQ_FOREACH(entry, &bsr->entries, link) {
if (entry->service == service) {
mtx_unlock(&bsr->lock);
return (EEXIST);
}
}
/* Initialize and insert our new entry */
entry = malloc(sizeof(*entry), M_BHND, M_NOWAIT);
if (entry == NULL) {
mtx_unlock(&bsr->lock);
return (ENOMEM);
}
entry->provider = provider;
entry->service = service;
entry->flags = flags;
refcount_init(&entry->refs, 0);
STAILQ_INSERT_HEAD(&bsr->entries, entry, link);
mtx_unlock(&bsr->lock);
return (0);
}
/**
* Free an unreferenced registry entry.
*
* @param entry The entry to be deallocated.
*/
static void
bhnd_service_registry_free_entry(struct bhnd_service_entry *entry)
{
KASSERT(entry->refs == 0, ("provider has active references"));
free(entry, M_BHND);
}
/**
* Attempt to remove the @p service provider registration for @p provider.
*
* @param bsr The service registry to be modified.
* @param provider The service provider to be deregistered.
* @param service The service for which @p provider will be deregistered,
* or BHND_SERVICE_ANY to remove all service
* registrations for @p provider.
*
* @retval 0 success
* @retval EBUSY if active references to @p provider exist; see
* bhnd_service_registry_retain() and
* bhnd_service_registry_release().
*/
int
bhnd_service_registry_remove(struct bhnd_service_registry *bsr,
device_t provider, bhnd_service_t service)
{
struct bhnd_service_entry *entry, *enext;
mtx_lock(&bsr->lock);
#define BHND_PROV_MATCH(_e) \
((_e)->provider == provider && \
(service == BHND_SERVICE_ANY || (_e)->service == service))
/* Validate matching provider entries before making any
* modifications */
STAILQ_FOREACH(entry, &bsr->entries, link) {
/* Skip non-matching entries */
if (!BHND_PROV_MATCH(entry))
continue;
/* Entry is in use? */
if (entry->refs > 0) {
mtx_unlock(&bsr->lock);
return (EBUSY);
}
}
/* We can now safely remove matching entries */
STAILQ_FOREACH_SAFE(entry, &bsr->entries, link, enext) {
/* Skip non-matching entries */
if (!BHND_PROV_MATCH(entry))
continue;
/* Remove from list */
STAILQ_REMOVE(&bsr->entries, entry, bhnd_service_entry, link);
/* Free provider entry */
bhnd_service_registry_free_entry(entry);
}
#undef BHND_PROV_MATCH
mtx_unlock(&bsr->lock);
return (0);
}
/**
* Retain and return a reference to a registered @p service provider, if any.
*
* @param bsr The service registry to be queried.
* @param service The service for which a provider should be returned.
*
* On success, the caller assumes ownership the returned provider, and
* is responsible for releasing this reference via
* bhnd_service_registry_release().
*
* @retval device_t success
* @retval NULL if no provider is registered for @p service.
*/
device_t
bhnd_service_registry_retain(struct bhnd_service_registry *bsr,
bhnd_service_t service)
{
struct bhnd_service_entry *entry;
mtx_lock(&bsr->lock);
STAILQ_FOREACH(entry, &bsr->entries, link) {
if (entry->service != service)
continue;
/* With a live refcount, entry is gauranteed to remain alive
* after we release our lock */
refcount_acquire(&entry->refs);
mtx_unlock(&bsr->lock);
return (entry->provider);
}
mtx_unlock(&bsr->lock);
/* Not found */
return (NULL);
}
/**
* Release a reference to a service provider previously returned by
* bhnd_service_registry_retain().
*
* If this is the last reference to an inherited service provider registration
* (see BHND_SPF_INHERITED), the registration will also be removed, and
* true will be returned.
*
* @param bsr The service registry from which @p provider
* was returned.
* @param provider The provider to be released.
* @param service The service for which @p provider was previously
* retained.
* @retval true The inherited service provider registration was removed;
* the caller should release its own reference to the
* provider.
* @retval false The service provider was not inherited, or active
* references to the provider remain.
*
* @see BHND_SPF_INHERITED
*/
bool
bhnd_service_registry_release(struct bhnd_service_registry *bsr,
device_t provider, bhnd_service_t service)
{
struct bhnd_service_entry *entry;
/* Exclusive lock, as we need to prevent any new references to the
* entry from being taken if it's to be removed */
mtx_lock(&bsr->lock);
STAILQ_FOREACH(entry, &bsr->entries, link) {
bool removed;
if (entry->provider != provider)
continue;
if (entry->service != service)
continue;
if (refcount_release(&entry->refs) &&
(entry->flags & BHND_SPF_INHERITED))
{
/* If an inherited entry is no longer actively
* referenced, remove the local registration and inform
* the caller. */
STAILQ_REMOVE(&bsr->entries, entry, bhnd_service_entry,
link);
bhnd_service_registry_free_entry(entry);
removed = true;
} else {
removed = false;
}
mtx_unlock(&bsr->lock);
return (removed);
}
/* Caller owns a reference, but no such provider is registered? */
panic("invalid service provider reference");
}
/**
* Using the bhnd(4) bus-level core information and a custom core name,
* populate @p dev's device description.
*
* @param dev A bhnd-bus attached device.
* @param dev_name The core's name (e.g. "SDIO Device Core").
*/
void
bhnd_set_custom_core_desc(device_t dev, const char *dev_name)
{
const char *vendor_name;
char *desc;
vendor_name = bhnd_get_vendor_name(dev);
asprintf(&desc, M_BHND, "%s %s, rev %hhu", vendor_name, dev_name,
bhnd_get_hwrev(dev));
if (desc != NULL) {
device_set_desc_copy(dev, desc);
free(desc, M_BHND);
} else {
device_set_desc(dev, dev_name);
}
}
/**
* Using the bhnd(4) bus-level core information, populate @p dev's device
* description.
*
* @param dev A bhnd-bus attached device.
*/
void
bhnd_set_default_core_desc(device_t dev)
{
bhnd_set_custom_core_desc(dev, bhnd_get_device_name(dev));
}
/**
* Using the bhnd @p chip_id, populate the bhnd(4) bus @p dev's device
* description.
*
* @param dev A bhnd-bus attached device.
* @param chip_id The chip identification.
*/
void
bhnd_set_default_bus_desc(device_t dev, const struct bhnd_chipid *chip_id)
{
const char *bus_name;
char *desc;
char chip_name[BHND_CHIPID_MAX_NAMELEN];
/* Determine chip type's bus name */
switch (chip_id->chip_type) {
case BHND_CHIPTYPE_SIBA:
bus_name = "SIBA bus";
break;
case BHND_CHIPTYPE_BCMA:
case BHND_CHIPTYPE_BCMA_ALT:
bus_name = "BCMA bus";
break;
case BHND_CHIPTYPE_UBUS:
bus_name = "UBUS bus";
break;
default:
bus_name = "Unknown Type";
break;
}
/* Format chip name */
bhnd_format_chip_id(chip_name, sizeof(chip_name),
chip_id->chip_id);
/* Format and set device description */
asprintf(&desc, M_BHND, "%s %s", chip_name, bus_name);
if (desc != NULL) {
device_set_desc_copy(dev, desc);
free(desc, M_BHND);
} else {
device_set_desc(dev, bus_name);
}
}
/**
* Helper function for implementing BHND_BUS_REGISTER_PROVIDER().
*
* This implementation delegates the request to the BHND_BUS_REGISTER_PROVIDER()
* method on the parent of @p dev. If no parent exists, the implementation
* will return an error.
*/
int
bhnd_bus_generic_register_provider(device_t dev, device_t child,
device_t provider, bhnd_service_t service)
{
device_t parent = device_get_parent(dev);
if (parent != NULL) {
return (BHND_BUS_REGISTER_PROVIDER(parent, child,
provider, service));
}
return (ENXIO);
}
/**
* Helper function for implementing BHND_BUS_DEREGISTER_PROVIDER().
*
* This implementation delegates the request to the
* BHND_BUS_DEREGISTER_PROVIDER() method on the parent of @p dev. If no parent
* exists, the implementation will panic.
*/
int
bhnd_bus_generic_deregister_provider(device_t dev, device_t child,
device_t provider, bhnd_service_t service)
{
device_t parent = device_get_parent(dev);
if (parent != NULL) {
return (BHND_BUS_DEREGISTER_PROVIDER(parent, child,
provider, service));
}
panic("missing BHND_BUS_DEREGISTER_PROVIDER()");
}
/**
* Helper function for implementing BHND_BUS_RETAIN_PROVIDER().
*
* This implementation delegates the request to the
* BHND_BUS_DEREGISTER_PROVIDER() method on the parent of @p dev. If no parent
* exists, the implementation will return NULL.
*/
device_t
bhnd_bus_generic_retain_provider(device_t dev, device_t child,
bhnd_service_t service)
{
device_t parent = device_get_parent(dev);
if (parent != NULL) {
return (BHND_BUS_RETAIN_PROVIDER(parent, child,
service));
}
return (NULL);
}
/**
* Helper function for implementing BHND_BUS_RELEASE_PROVIDER().
*
* This implementation delegates the request to the
* BHND_BUS_DEREGISTER_PROVIDER() method on the parent of @p dev. If no parent
* exists, the implementation will panic.
*/
void
bhnd_bus_generic_release_provider(device_t dev, device_t child,
device_t provider, bhnd_service_t service)
{
device_t parent = device_get_parent(dev);
if (parent != NULL) {
return (BHND_BUS_RELEASE_PROVIDER(parent, child,
provider, service));
}
panic("missing BHND_BUS_RELEASE_PROVIDER()");
}
/**
* Helper function for implementing BHND_BUS_REGISTER_PROVIDER().
*
* This implementation uses the bhnd_service_registry_add() function to
* do most of the work. It calls BHND_BUS_GET_SERVICE_REGISTRY() to find
* a suitable service registry to edit.
*/
int
bhnd_bus_generic_sr_register_provider(device_t dev, device_t child,
device_t provider, bhnd_service_t service)
{
struct bhnd_service_registry *bsr;
bsr = BHND_BUS_GET_SERVICE_REGISTRY(dev, child);
KASSERT(bsr != NULL, ("NULL service registry"));
return (bhnd_service_registry_add(bsr, provider, service, 0));
}
/**
* Helper function for implementing BHND_BUS_DEREGISTER_PROVIDER().
*
* This implementation uses the bhnd_service_registry_remove() function to
* do most of the work. It calls BHND_BUS_GET_SERVICE_REGISTRY() to find
* a suitable service registry to edit.
*/
int
bhnd_bus_generic_sr_deregister_provider(device_t dev, device_t child,
device_t provider, bhnd_service_t service)
{
struct bhnd_service_registry *bsr;
bsr = BHND_BUS_GET_SERVICE_REGISTRY(dev, child);
KASSERT(bsr != NULL, ("NULL service registry"));
return (bhnd_service_registry_remove(bsr, provider, service));
}
/**
* Helper function for implementing BHND_BUS_RETAIN_PROVIDER().
*
* This implementation uses the bhnd_service_registry_retain() function to
* do most of the work. It calls BHND_BUS_GET_SERVICE_REGISTRY() to find
* a suitable service registry.
*
* If a local provider for the service is not available, and a parent device is
* available, this implementation will attempt to fetch and locally register
* a service provider reference from the parent of @p dev.
*/
device_t
bhnd_bus_generic_sr_retain_provider(device_t dev, device_t child,
bhnd_service_t service)
{
struct bhnd_service_registry *bsr;
device_t parent, provider;
int error;
bsr = BHND_BUS_GET_SERVICE_REGISTRY(dev, child);
KASSERT(bsr != NULL, ("NULL service registry"));
/*
* Attempt to fetch a service provider reference from either the local
* service registry, or if not found, from our parent.
*
* If we fetch a provider from our parent, we register the provider
* with the local service registry to prevent conflicting local
* registrations from being added.
*/
while (1) {
/* Check the local service registry first */
provider = bhnd_service_registry_retain(bsr, service);
if (provider != NULL)
return (provider);
/* Otherwise, try to delegate to our parent (if any) */
if ((parent = device_get_parent(dev)) == NULL)
return (NULL);
provider = BHND_BUS_RETAIN_PROVIDER(parent, dev, service);
if (provider == NULL)
return (NULL);
/* Register the inherited service registration with the local
* registry */
error = bhnd_service_registry_add(bsr, provider, service,
BHND_SPF_INHERITED);
if (error) {
BHND_BUS_RELEASE_PROVIDER(parent, dev, provider,
service);
if (error == EEXIST) {
/* A valid service provider was registered
* concurrently; retry fetching from the local
* registry */
continue;
}
device_printf(dev, "failed to register service "
"provider: %d\n", error);
return (NULL);
}
}
}
/**
* Helper function for implementing BHND_BUS_RELEASE_PROVIDER().
*
* This implementation uses the bhnd_service_registry_release() function to
* do most of the work. It calls BHND_BUS_GET_SERVICE_REGISTRY() to find
* a suitable service registry.
*/
void
bhnd_bus_generic_sr_release_provider(device_t dev, device_t child,
device_t provider, bhnd_service_t service)
{
struct bhnd_service_registry *bsr;
bsr = BHND_BUS_GET_SERVICE_REGISTRY(dev, child);
KASSERT(bsr != NULL, ("NULL service registry"));
/* Release the provider reference; if the refcount hits zero on an
* inherited reference, true will be returned, and we need to drop
* our own bus reference to the provider */
if (!bhnd_service_registry_release(bsr, provider, service))
return;
/* Drop our reference to the borrowed provider */
BHND_BUS_RELEASE_PROVIDER(device_get_parent(dev), dev, provider,
service);
}
/**
* Helper function for implementing BHND_BUS_IS_HW_DISABLED().
*
* If a parent device is available, this implementation delegates the
* request to the BHND_BUS_IS_HW_DISABLED() method on the parent of @p dev.
*
* If no parent device is available (i.e. on a the bus root), the hardware
* is assumed to be usable and false is returned.
*/
bool
bhnd_bus_generic_is_hw_disabled(device_t dev, device_t child)
{
if (device_get_parent(dev) != NULL)
return (BHND_BUS_IS_HW_DISABLED(device_get_parent(dev), child));
return (false);
}
/**
* Helper function for implementing BHND_BUS_GET_CHIPID().
*
* This implementation delegates the request to the BHND_BUS_GET_CHIPID()
* method on the parent of @p dev. If no parent exists, the implementation
* will panic.
*/
const struct bhnd_chipid *
bhnd_bus_generic_get_chipid(device_t dev, device_t child)
{
if (device_get_parent(dev) != NULL)
return (BHND_BUS_GET_CHIPID(device_get_parent(dev), child));
panic("missing BHND_BUS_GET_CHIPID()");
}
/**
* Helper function for implementing BHND_BUS_GET_DMA_TRANSLATION().
*
* If a parent device is available, this implementation delegates the
* request to the BHND_BUS_GET_DMA_TRANSLATION() method on the parent of @p dev.
*
* If no parent device is available, this implementation will panic.
*/
int
bhnd_bus_generic_get_dma_translation(device_t dev, device_t child, u_int width,
uint32_t flags, bus_dma_tag_t *dmat,
struct bhnd_dma_translation *translation)
{
if (device_get_parent(dev) != NULL) {
return (BHND_BUS_GET_DMA_TRANSLATION(device_get_parent(dev),
child, width, flags, dmat, translation));
}
panic("missing BHND_BUS_GET_DMA_TRANSLATION()");
}
/* nvram board_info population macros for bhnd_bus_generic_read_board_info() */
#define BHND_GV(_dest, _name) \
bhnd_nvram_getvar_uint(child, BHND_NVAR_ ## _name, &_dest, \
sizeof(_dest))
#define REQ_BHND_GV(_dest, _name) do { \
if ((error = BHND_GV(_dest, _name))) { \
device_printf(dev, \
"error reading " __STRING(_name) ": %d\n", error); \
return (error); \
} \
} while(0)
#define OPT_BHND_GV(_dest, _name, _default) do { \
if ((error = BHND_GV(_dest, _name))) { \
if (error != ENOENT) { \
device_printf(dev, \
"error reading " \
__STRING(_name) ": %d\n", error); \
return (error); \
} \
_dest = _default; \
} \
} while(0)
/**
* Helper function for implementing BHND_BUS_READ_BOARDINFO().
*
* This implementation populates @p info with information from NVRAM,
* defaulting board_vendor and board_type fields to 0 if the
* requested variables cannot be found.
*
* This behavior is correct for most SoCs, but must be overridden on
* bridged (PCI, PCMCIA, etc) devices to produce a complete bhnd_board_info
* result.
*/
int
bhnd_bus_generic_read_board_info(device_t dev, device_t child,
struct bhnd_board_info *info)
{
int error;
OPT_BHND_GV(info->board_vendor, BOARDVENDOR, 0);
OPT_BHND_GV(info->board_type, BOARDTYPE, 0); /* srom >= 2 */
OPT_BHND_GV(info->board_devid, DEVID, 0); /* srom >= 8 */
REQ_BHND_GV(info->board_rev, BOARDREV);
OPT_BHND_GV(info->board_srom_rev,SROMREV, 0); /* missing in
some SoC
NVRAM */
REQ_BHND_GV(info->board_flags, BOARDFLAGS);
OPT_BHND_GV(info->board_flags2, BOARDFLAGS2, 0); /* srom >= 4 */
OPT_BHND_GV(info->board_flags3, BOARDFLAGS3, 0); /* srom >= 11 */
return (0);
}
#undef BHND_GV
#undef BHND_GV_REQ
#undef BHND_GV_OPT
/**
* Helper function for implementing BHND_BUS_GET_NVRAM_VAR().
*
* This implementation searches @p dev for a usable NVRAM child device.
*
* If no usable child device is found on @p dev, the request is delegated to
* the BHND_BUS_GET_NVRAM_VAR() method on the parent of @p dev.
*/
int
bhnd_bus_generic_get_nvram_var(device_t dev, device_t child, const char *name,
void *buf, size_t *size, bhnd_nvram_type type)
{
device_t nvram;
device_t parent;
/* Make sure we're holding Giant for newbus */
GIANT_REQUIRED;
/* Look for a directly-attached NVRAM child */
if ((nvram = device_find_child(dev, "bhnd_nvram", -1)) != NULL)
return BHND_NVRAM_GETVAR(nvram, name, buf, size, type);
/* Try to delegate to parent */
if ((parent = device_get_parent(dev)) == NULL)
return (ENODEV);
return (BHND_BUS_GET_NVRAM_VAR(device_get_parent(dev), child,
name, buf, size, type));
}
/**
* Helper function for implementing BHND_BUS_ALLOC_RESOURCE().
*
* This implementation of BHND_BUS_ALLOC_RESOURCE() delegates allocation
* of the underlying resource to BUS_ALLOC_RESOURCE(), and activation
* to @p dev's BHND_BUS_ACTIVATE_RESOURCE().
*/
struct bhnd_resource *
bhnd_bus_generic_alloc_resource(device_t dev, device_t child, int type,
int *rid, rman_res_t start, rman_res_t end, rman_res_t count,
u_int flags)
{
struct bhnd_resource *br;
struct resource *res;
int error;
br = NULL;
res = NULL;
/* Allocate the real bus resource (without activating it) */
res = BUS_ALLOC_RESOURCE(dev, child, type, rid, start, end, count,
(flags & ~RF_ACTIVE));
if (res == NULL)
return (NULL);
/* Allocate our bhnd resource wrapper. */
br = malloc(sizeof(struct bhnd_resource), M_BHND, M_NOWAIT);
if (br == NULL)
goto failed;
br->direct = false;
br->res = res;
/* Attempt activation */
if (flags & RF_ACTIVE) {
error = BHND_BUS_ACTIVATE_RESOURCE(dev, child, type, *rid, br);
if (error)
goto failed;
}
return (br);
failed:
if (res != NULL)
BUS_RELEASE_RESOURCE(dev, child, type, *rid, res);
free(br, M_BHND);
return (NULL);
}
/**
* Helper function for implementing BHND_BUS_RELEASE_RESOURCE().
*
* This implementation of BHND_BUS_RELEASE_RESOURCE() delegates release of
* the backing resource to BUS_RELEASE_RESOURCE().
*/
int
bhnd_bus_generic_release_resource(device_t dev, device_t child, int type,
int rid, struct bhnd_resource *r)
{
int error;
if ((error = BUS_RELEASE_RESOURCE(dev, child, type, rid, r->res)))
return (error);
free(r, M_BHND);
return (0);
}
/**
* Helper function for implementing BHND_BUS_ACTIVATE_RESOURCE().
*
* This implementation of BHND_BUS_ACTIVATE_RESOURCE() first calls the
* BHND_BUS_ACTIVATE_RESOURCE() method of the parent of @p dev.
*
* If this fails, and if @p dev is the direct parent of @p child, standard
* resource activation is attempted via bus_activate_resource(). This enables
* direct use of the bhnd(4) resource APIs on devices that may not be attached
* to a parent bhnd bus or bridge.
*/
int
bhnd_bus_generic_activate_resource(device_t dev, device_t child, int type,
int rid, struct bhnd_resource *r)
{
int error;
bool passthrough;
passthrough = (device_get_parent(child) != dev);
/* Try to delegate to the parent */
if (device_get_parent(dev) != NULL) {
error = BHND_BUS_ACTIVATE_RESOURCE(device_get_parent(dev),
child, type, rid, r);
} else {
error = ENODEV;
}
/* If bhnd(4) activation has failed and we're the child's direct
* parent, try falling back on standard resource activation.
*/
if (error && !passthrough) {
error = bus_activate_resource(child, type, rid, r->res);
if (!error)
r->direct = true;
}
return (error);
}
/**
* Helper function for implementing BHND_BUS_DEACTIVATE_RESOURCE().
*
* This implementation of BHND_BUS_ACTIVATE_RESOURCE() simply calls the
* BHND_BUS_ACTIVATE_RESOURCE() method of the parent of @p dev.
*/
int
bhnd_bus_generic_deactivate_resource(device_t dev, device_t child,
int type, int rid, struct bhnd_resource *r)
{
if (device_get_parent(dev) != NULL)
return (BHND_BUS_DEACTIVATE_RESOURCE(device_get_parent(dev),
child, type, rid, r));
return (EINVAL);
}
/**
* Helper function for implementing BHND_BUS_GET_INTR_DOMAIN().
*
* This implementation simply returns the address of nearest bhnd(4) bus,
* which may be @p dev; this behavior may be incompatible with FDT/OFW targets.
*/
uintptr_t
bhnd_bus_generic_get_intr_domain(device_t dev, device_t child, bool self)
{
return ((uintptr_t)dev);
}
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