freebsd-dev/sys/arm64/cavium/thunder_pcie_common.c

211 lines
5.6 KiB
C
Raw Normal View History

/*-
* Copyright (c) 2015 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Semihalf under
* the sponsorship of 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.
* 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.
*/
/* Common PCIe functions for Cavium Thunder SOC */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_platform.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/bus.h>
#include <sys/rman.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/intr.h>
#ifdef FDT
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/ofw/ofw_pci.h>
#endif
#include <sys/pciio.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pci_private.h>
#include <dev/pci/pcib_private.h>
#include <dev/pci/pci_host_generic.h>
#ifdef FDT
#include <dev/pci/pci_host_generic_fdt.h>
#endif
#include "thunder_pcie_common.h"
MALLOC_DEFINE(M_THUNDER_PCIE, "Thunder PCIe driver", "Thunder PCIe driver memory");
#define THUNDER_CFG_BASE_TO_ECAM(x) ((((x) >> 36UL) & 0x3) | (((x) >> 42UL) & 0x4))
uint32_t
range_addr_is_pci(struct pcie_range *ranges, uint64_t addr, uint64_t size)
{
struct pcie_range *r;
int tuple;
for (tuple = 0; tuple < MAX_RANGES_TUPLES; tuple++) {
r = &ranges[tuple];
if (addr >= r->pci_base &&
addr < (r->pci_base + r->size) &&
size < r->size) {
/* Address is within PCI range */
return (1);
}
}
/* Address is outside PCI range */
return (0);
}
uint32_t
range_addr_is_phys(struct pcie_range *ranges, uint64_t addr, uint64_t size)
{
struct pcie_range *r;
int tuple;
for (tuple = 0; tuple < MAX_RANGES_TUPLES; tuple++) {
r = &ranges[tuple];
if (addr >= r->phys_base &&
addr < (r->phys_base + r->size) &&
size < r->size) {
/* Address is within Physical range */
return (1);
}
}
/* Address is outside Physical range */
return (0);
}
uint64_t
range_addr_phys_to_pci(struct pcie_range *ranges, uint64_t phys_addr)
{
struct pcie_range *r;
uint64_t offset;
int tuple;
/* Find physical address corresponding to given bus address */
for (tuple = 0; tuple < MAX_RANGES_TUPLES; tuple++) {
r = &ranges[tuple];
if (phys_addr >= r->phys_base &&
phys_addr < (r->phys_base + r->size)) {
/* Given phys addr is in this range.
* Translate phys addr to bus addr.
*/
offset = phys_addr - r->phys_base;
return (r->pci_base + offset);
}
}
return (0);
}
uint64_t
range_addr_pci_to_phys(struct pcie_range *ranges, uint64_t pci_addr)
{
struct pcie_range *r;
uint64_t offset;
int tuple;
/* Find physical address corresponding to given bus address */
for (tuple = 0; tuple < MAX_RANGES_TUPLES; tuple++) {
r = &ranges[tuple];
if (pci_addr >= r->pci_base &&
pci_addr < (r->pci_base + r->size)) {
/* Given pci addr is in this range.
* Translate bus addr to phys addr.
*/
offset = pci_addr - r->pci_base;
return (r->phys_base + offset);
}
}
return (0);
}
int
thunder_pcie_identify_ecam(device_t dev, int *ecam)
{
rman_res_t start;
/* Check if we're running on Cavium ThunderX */
if (!CPU_MATCH(CPU_IMPL_MASK | CPU_PART_MASK,
CPU_IMPL_CAVIUM, CPU_PART_THUNDER, 0, 0))
return (EINVAL);
start = bus_get_resource_start(dev, SYS_RES_MEMORY, 0);
*ecam = THUNDER_CFG_BASE_TO_ECAM(start);
device_printf(dev, "ThunderX quirk, setting ECAM to %d\n", *ecam);
return (0);
}
#ifdef THUNDERX_PASS_1_1_ERRATA
struct resource *
thunder_pcie_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)
{
pci_addr_t map, testval;
/*
* If Enhanced Allocation is not used, we can't allocate any random
* range. All internal devices have hardcoded place where they can
* be located within PCI address space. Fortunately, we can read
* this value from BAR.
*/
if (((type == SYS_RES_IOPORT) || (type == SYS_RES_MEMORY)) &&
RMAN_IS_DEFAULT_RANGE(start, end)) {
/* Read BAR manually to get resource address and size */
pci_read_bar(child, *rid, &map, &testval, NULL);
/* Mask the information bits */
if (PCI_BAR_MEM(map))
map &= PCIM_BAR_MEM_BASE;
else
map &= PCIM_BAR_IO_BASE;
if (PCI_BAR_MEM(testval))
testval &= PCIM_BAR_MEM_BASE;
else
testval &= PCIM_BAR_IO_BASE;
start = map;
end = start + count - 1;
}
return (pci_host_generic_core_alloc_resource(dev, child, type, rid,
start, end, count, flags));
}
#endif