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freebsd-dev/sys/mips/rmi/xlr_pci.c
Marius Strobl 4b7ec27007 - There's no need to overwrite the default device method with the default 
one. Interestingly, these are actually the default for quite some time
  (bus_generic_driver_added(9) since r52045 and bus_generic_print_child(9)
  since r52045) but even recently added device drivers do this unnecessarily.
  Discussed with: jhb, marcel
- While at it, use DEVMETHOD_END.
  Discussed with: jhb
- Also while at it, use __FBSDID.
2011-11-22 21:28:20 +00:00

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/*-
* Copyright (c) 2003-2009 RMI Corporation
* 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.
* 3. Neither the name of RMI Corporation, nor the names of its contributors,
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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.
*
* RMI_BSD */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/rman.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <machine/bus.h>
#include <machine/md_var.h>
#include <machine/intr_machdep.h>
#include <machine/cpuregs.h>
#include <mips/rmi/rmi_mips_exts.h>
#include <mips/rmi/interrupt.h>
#include <mips/rmi/iomap.h>
#include <mips/rmi/pic.h>
#include <mips/rmi/board.h>
#include <mips/rmi/pcibus.h>
#include "pcib_if.h"
#define pci_cfg_offset(bus,slot,devfn,where) (((bus)<<16) + ((slot) << 11)+((devfn)<<8)+(where))
#define PCIE_LINK_STATE 0x4000
#define LSU_CFG0_REGID 0
#define LSU_CERRLOG_REGID 9
#define LSU_CERROVF_REGID 10
#define LSU_CERRINT_REGID 11
/* MSI support */
#define MSI_MIPS_ADDR_DEST 0x000ff000
#define MSI_MIPS_ADDR_RH 0x00000008
#define MSI_MIPS_ADDR_RH_OFF 0x00000000
#define MSI_MIPS_ADDR_RH_ON 0x00000008
#define MSI_MIPS_ADDR_DM 0x00000004
#define MSI_MIPS_ADDR_DM_PHYSICAL 0x00000000
#define MSI_MIPS_ADDR_DM_LOGICAL 0x00000004
/* Fields in data for Intel MSI messages. */
#define MSI_MIPS_DATA_TRGRMOD 0x00008000 /* Trigger mode */
#define MSI_MIPS_DATA_TRGREDG 0x00000000 /* edge */
#define MSI_MIPS_DATA_TRGRLVL 0x00008000 /* level */
#define MSI_MIPS_DATA_LEVEL 0x00004000 /* Polarity. */
#define MSI_MIPS_DATA_DEASSERT 0x00000000
#define MSI_MIPS_DATA_ASSERT 0x00004000
#define MSI_MIPS_DATA_DELMOD 0x00000700 /* Delivery Mode */
#define MSI_MIPS_DATA_DELFIXED 0x00000000 /* fixed */
#define MSI_MIPS_DATA_DELLOPRI 0x00000100 /* lowest priority */
#define MSI_MIPS_DATA_INTVEC 0x000000ff
/*
* Build Intel MSI message and data values from a source. AMD64 systems
* seem to be compatible, so we use the same function for both.
*/
#define MIPS_MSI_ADDR(cpu) \
(MSI_MIPS_ADDR_BASE | (cpu) << 12 | \
MSI_MIPS_ADDR_RH_OFF | MSI_MIPS_ADDR_DM_PHYSICAL)
#define MIPS_MSI_DATA(irq) \
(MSI_MIPS_DATA_TRGRLVL | MSI_MIPS_DATA_DELFIXED | \
MSI_MIPS_DATA_ASSERT | (irq))
struct xlr_pcib_softc {
bus_dma_tag_t sc_pci_dmat; /* PCI DMA tag pointer */
};
static devclass_t pcib_devclass;
static void *xlr_pci_config_base;
static struct rman irq_rman, port_rman, mem_rman;
static void
xlr_pci_init_resources(void)
{
irq_rman.rm_start = 0;
irq_rman.rm_end = 255;
irq_rman.rm_type = RMAN_ARRAY;
irq_rman.rm_descr = "PCI Mapped Interrupts";
if (rman_init(&irq_rman)
|| rman_manage_region(&irq_rman, 0, 255))
panic("pci_init_resources irq_rman");
port_rman.rm_start = 0;
port_rman.rm_end = ~0ul;
port_rman.rm_type = RMAN_ARRAY;
port_rman.rm_descr = "I/O ports";
if (rman_init(&port_rman)
|| rman_manage_region(&port_rman, 0x10000000, 0x1fffffff))
panic("pci_init_resources port_rman");
mem_rman.rm_start = 0;
mem_rman.rm_end = ~0ul;
mem_rman.rm_type = RMAN_ARRAY;
mem_rman.rm_descr = "I/O memory";
if (rman_init(&mem_rman)
|| rman_manage_region(&mem_rman, 0xd0000000, 0xdfffffff))
panic("pci_init_resources mem_rman");
}
static int
xlr_pcib_probe(device_t dev)
{
if (xlr_board_info.is_xls)
device_set_desc(dev, "XLS PCIe bus");
else
device_set_desc(dev, "XLR PCI bus");
xlr_pci_init_resources();
xlr_pci_config_base = (void *)MIPS_PHYS_TO_KSEG1(DEFAULT_PCI_CONFIG_BASE);
return (0);
}
static int
xlr_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
switch (which) {
case PCIB_IVAR_DOMAIN:
*result = 0;
return (0);
case PCIB_IVAR_BUS:
*result = 0;
return (0);
}
return (ENOENT);
}
static int
xlr_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t result)
{
switch (which) {
case PCIB_IVAR_DOMAIN:
return (EINVAL);
case PCIB_IVAR_BUS:
return (EINVAL);
}
return (ENOENT);
}
static int
xlr_pcib_maxslots(device_t dev)
{
return (PCI_SLOTMAX);
}
static __inline__ void
disable_and_clear_cache_error(void)
{
uint64_t lsu_cfg0;
lsu_cfg0 = read_xlr_ctrl_register(CPU_BLOCKID_LSU, LSU_CFG0_REGID);
lsu_cfg0 = lsu_cfg0 & ~0x2e;
write_xlr_ctrl_register(CPU_BLOCKID_LSU, LSU_CFG0_REGID, lsu_cfg0);
/* Clear cache error log */
write_xlr_ctrl_register(CPU_BLOCKID_LSU, LSU_CERRLOG_REGID, 0);
}
static __inline__ void
clear_and_enable_cache_error(void)
{
uint64_t lsu_cfg0 = 0;
/* first clear the cache error logging register */
write_xlr_ctrl_register(CPU_BLOCKID_LSU, LSU_CERRLOG_REGID, 0);
write_xlr_ctrl_register(CPU_BLOCKID_LSU, LSU_CERROVF_REGID, 0);
write_xlr_ctrl_register(CPU_BLOCKID_LSU, LSU_CERRINT_REGID, 0);
lsu_cfg0 = read_xlr_ctrl_register(CPU_BLOCKID_LSU, LSU_CFG0_REGID);
lsu_cfg0 = lsu_cfg0 | 0x2e;
write_xlr_ctrl_register(CPU_BLOCKID_LSU, LSU_CFG0_REGID, lsu_cfg0);
}
static uint32_t
pci_cfg_read_32bit(uint32_t addr)
{
uint32_t temp = 0;
uint32_t *p = (uint32_t *)xlr_pci_config_base + addr / sizeof(uint32_t);
uint64_t cerr_cpu_log = 0;
disable_and_clear_cache_error();
temp = bswap32(*p);
/* Read cache err log */
cerr_cpu_log = read_xlr_ctrl_register(CPU_BLOCKID_LSU,
LSU_CERRLOG_REGID);
if (cerr_cpu_log) {
/* Device don't exist. */
temp = ~0x0;
}
clear_and_enable_cache_error();
return (temp);
}
static u_int32_t
xlr_pcib_read_config(device_t dev, u_int b, u_int s, u_int f,
u_int reg, int width)
{
uint32_t data = 0;
if ((width == 2) && (reg & 1))
return 0xFFFFFFFF;
else if ((width == 4) && (reg & 3))
return 0xFFFFFFFF;
data = pci_cfg_read_32bit(pci_cfg_offset(b, s, f, reg));
if (width == 1)
return ((data >> ((reg & 3) << 3)) & 0xff);
else if (width == 2)
return ((data >> ((reg & 3) << 3)) & 0xffff);
else
return (data);
}
static void
xlr_pcib_write_config(device_t dev, u_int b, u_int s, u_int f,
u_int reg, u_int32_t val, int width)
{
uint32_t cfgaddr = pci_cfg_offset(b, s, f, reg);
uint32_t data = 0, *p;
if ((width == 2) && (reg & 1))
return;
else if ((width == 4) && (reg & 3))
return;
if (width == 1) {
data = pci_cfg_read_32bit(cfgaddr);
data = (data & ~(0xff << ((reg & 3) << 3))) |
(val << ((reg & 3) << 3));
} else if (width == 2) {
data = pci_cfg_read_32bit(cfgaddr);
data = (data & ~(0xffff << ((reg & 3) << 3))) |
(val << ((reg & 3) << 3));
} else {
data = val;
}
p = (uint32_t *)xlr_pci_config_base + cfgaddr / sizeof(uint32_t);
*p = bswap32(data);
return;
}
static int
xlr_pcib_attach(device_t dev)
{
struct xlr_pcib_softc *sc;
sc = device_get_softc(dev);
/*
* XLR C revision chips cannot do DMA above 2G physical address
* create a parent tag with this lowaddr
*/
if (xlr_is_c_revision()) {
if (bus_dma_tag_create(bus_get_dma_tag(dev), 1, 0,
0x7fffffff, ~0, NULL, NULL, 0x7fffffff,
0xff, 0x7fffffff, 0, NULL, NULL, &sc->sc_pci_dmat) != 0)
panic("%s: bus_dma_tag_create failed", __func__);
}
device_add_child(dev, "pci", 0);
bus_generic_attach(dev);
return (0);
}
static void
xlr_pcib_identify(driver_t * driver, device_t parent)
{
BUS_ADD_CHILD(parent, 0, "pcib", 0);
}
/*
* XLS PCIe can have upto 4 links, and each link has its on IRQ
* Find the link on which the device is on
*/
static int
xls_pcie_link(device_t pcib, device_t dev)
{
device_t parent, tmp;
/* find the lane on which the slot is connected to */
printf("xls_pcie_link : bus %s dev %s\n", device_get_nameunit(pcib),
device_get_nameunit(dev));
tmp = dev;
while (1) {
parent = device_get_parent(tmp);
if (parent == NULL || parent == pcib) {
device_printf(dev, "Cannot find parent bus\n");
return (-1);
}
if (strcmp(device_get_nameunit(parent), "pci0") == 0)
break;
tmp = parent;
}
return (pci_get_slot(tmp));
}
/*
* Find the IRQ for the link, each link has a different interrupt
* at the XLS pic
*/
static int
xls_pcie_link_irq(int link)
{
switch (link) {
case 0:
return (PIC_PCIE_LINK0_IRQ);
case 1:
return (PIC_PCIE_LINK1_IRQ);
case 2:
if (xlr_is_xls_b0())
return (PIC_PCIE_B0_LINK2_IRQ);
else
return (PIC_PCIE_LINK2_IRQ);
case 3:
if (xlr_is_xls_b0())
return (PIC_PCIE_B0_LINK3_IRQ);
else
return (PIC_PCIE_LINK3_IRQ);
}
return (-1);
}
static int
xlr_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs)
{
int i, link;
/*
* Each link has 32 MSIs that can be allocated, but for now
* we only support one device per link.
* msi_alloc() equivalent is needed when we start supporting
* bridges on the PCIe link.
*/
link = xls_pcie_link(pcib, dev);
if (link == -1)
return (ENXIO);
/*
* encode the irq so that we know it is a MSI interrupt when we
* setup interrupts
*/
for (i = 0; i < count; i++)
irqs[i] = 64 + link * 32 + i;
return (0);
}
static int
xlr_release_msi(device_t pcib, device_t dev, int count, int *irqs)
{
device_printf(dev, "%s: msi release %d\n", device_get_nameunit(pcib),
count);
return (0);
}
static int
xlr_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr,
uint32_t *data)
{
int msi;
if (irq >= 64) {
msi = irq - 64;
*addr = MIPS_MSI_ADDR(0);
*data = MIPS_MSI_DATA(msi);
return (0);
} else {
device_printf(dev, "%s: map_msi for irq %d - ignored",
device_get_nameunit(pcib), irq);
return (ENXIO);
}
}
static void
bridge_pcix_ack(int irq)
{
(void)xlr_read_reg(xlr_io_mmio(XLR_IO_PCIX_OFFSET), 0x140 >> 2);
}
static void
bridge_pcie_ack(int irq)
{
uint32_t reg;
xlr_reg_t *pcie_mmio_le = xlr_io_mmio(XLR_IO_PCIE_1_OFFSET);
switch (irq) {
case PIC_PCIE_LINK0_IRQ:
reg = PCIE_LINK0_MSI_STATUS;
break;
case PIC_PCIE_LINK1_IRQ:
reg = PCIE_LINK1_MSI_STATUS;
break;
case PIC_PCIE_LINK2_IRQ:
case PIC_PCIE_B0_LINK2_IRQ:
reg = PCIE_LINK2_MSI_STATUS;
break;
case PIC_PCIE_LINK3_IRQ:
case PIC_PCIE_B0_LINK3_IRQ:
reg = PCIE_LINK3_MSI_STATUS;
break;
default:
return;
}
xlr_write_reg(pcie_mmio_le, reg>>2, 0xffffffff);
}
static int
mips_platform_pci_setup_intr(device_t dev, device_t child,
struct resource *irq, int flags, driver_filter_t *filt,
driver_intr_t *intr, void *arg, void **cookiep)
{
int error = 0;
int xlrirq;
error = rman_activate_resource(irq);
if (error)
return error;
if (rman_get_start(irq) != rman_get_end(irq)) {
device_printf(dev, "Interrupt allocation %lu != %lu\n",
rman_get_start(irq), rman_get_end(irq));
return (EINVAL);
}
xlrirq = rman_get_start(irq);
if (strcmp(device_get_name(dev), "pcib") != 0)
return (0);
if (xlr_board_info.is_xls == 0) {
xlr_establish_intr(device_get_name(child), filt,
intr, arg, PIC_PCIX_IRQ, flags, cookiep, bridge_pcix_ack);
pic_setup_intr(PIC_IRT_PCIX_INDEX, PIC_PCIX_IRQ, 0x1, 1);
} else {
/*
* temporary hack for MSI, we support just one device per
* link, and assign the link interrupt to the device interrupt
*/
if (xlrirq >= 64) {
xlrirq -= 64;
if (xlrirq % 32 != 0)
return (0);
xlrirq = xls_pcie_link_irq(xlrirq / 32);
if (xlrirq == -1)
return (EINVAL);
}
xlr_establish_intr(device_get_name(child), filt,
intr, arg, xlrirq, flags, cookiep, bridge_pcie_ack);
pic_setup_intr(xlrirq - PIC_IRQ_BASE, xlrirq, 0x1, 1);
}
return (bus_generic_setup_intr(dev, child, irq, flags, filt, intr,
arg, cookiep));
}
static int
mips_platform_pci_teardown_intr(device_t dev, device_t child,
struct resource *irq, void *cookie)
{
if (strcmp(device_get_name(child), "pci") == 0) {
/* if needed reprogram the pic to clear pcix related entry */
device_printf(dev, "teardown intr\n");
}
return (bus_generic_teardown_intr(dev, child, irq, cookie));
}
static struct resource *
xlr_pci_alloc_resource(device_t bus, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct rman *rm;
struct resource *rv;
vm_offset_t va;
int needactivate = flags & RF_ACTIVE;
switch (type) {
case SYS_RES_IRQ:
rm = &irq_rman;
break;
case SYS_RES_IOPORT:
rm = &port_rman;
break;
case SYS_RES_MEMORY:
rm = &mem_rman;
break;
default:
return (0);
}
rv = rman_reserve_resource(rm, start, end, count, flags, child);
if (rv == 0)
return (0);
rman_set_rid(rv, *rid);
if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
va = (vm_offset_t)pmap_mapdev(start, count);
rman_set_bushandle(rv, va);
/* bushandle is same as virtual addr */
rman_set_virtual(rv, (void *)va);
rman_set_bustag(rv, rmi_pci_bus_space);
}
if (needactivate) {
if (bus_activate_resource(child, type, *rid, rv)) {
rman_release_resource(rv);
return (NULL);
}
}
return (rv);
}
static int
xlr_pci_release_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
return (rman_release_resource(r));
}
static bus_dma_tag_t
xlr_pci_get_dma_tag(device_t bus, device_t child)
{
struct xlr_pcib_softc *sc;
sc = device_get_softc(bus);
return (sc->sc_pci_dmat);
}
static int
xlr_pci_activate_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
return (rman_activate_resource(r));
}
static int
xlr_pci_deactivate_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
return (rman_deactivate_resource(r));
}
static int
mips_pci_route_interrupt(device_t bus, device_t dev, int pin)
{
int irq, link;
/*
* Validate requested pin number.
*/
if ((pin < 1) || (pin > 4))
return (255);
if (xlr_board_info.is_xls) {
link = xls_pcie_link(bus, dev);
irq = xls_pcie_link_irq(link);
if (irq != -1)
return (irq);
} else {
if (pin == 1)
return (PIC_PCIX_IRQ);
}
return (255);
}
static device_method_t xlr_pcib_methods[] = {
/* Device interface */
DEVMETHOD(device_identify, xlr_pcib_identify),
DEVMETHOD(device_probe, xlr_pcib_probe),
DEVMETHOD(device_attach, xlr_pcib_attach),
/* Bus interface */
DEVMETHOD(bus_read_ivar, xlr_pcib_read_ivar),
DEVMETHOD(bus_write_ivar, xlr_pcib_write_ivar),
DEVMETHOD(bus_alloc_resource, xlr_pci_alloc_resource),
DEVMETHOD(bus_release_resource, xlr_pci_release_resource),
DEVMETHOD(bus_get_dma_tag, xlr_pci_get_dma_tag),
DEVMETHOD(bus_activate_resource, xlr_pci_activate_resource),
DEVMETHOD(bus_deactivate_resource, xlr_pci_deactivate_resource),
DEVMETHOD(bus_setup_intr, mips_platform_pci_setup_intr),
DEVMETHOD(bus_teardown_intr, mips_platform_pci_teardown_intr),
/* pcib interface */
DEVMETHOD(pcib_maxslots, xlr_pcib_maxslots),
DEVMETHOD(pcib_read_config, xlr_pcib_read_config),
DEVMETHOD(pcib_write_config, xlr_pcib_write_config),
DEVMETHOD(pcib_route_interrupt, mips_pci_route_interrupt),
DEVMETHOD(pcib_alloc_msi, xlr_alloc_msi),
DEVMETHOD(pcib_release_msi, xlr_release_msi),
DEVMETHOD(pcib_map_msi, xlr_map_msi),
DEVMETHOD_END
};
static driver_t xlr_pcib_driver = {
"pcib",
xlr_pcib_methods,
sizeof(struct xlr_pcib_softc),
};
DRIVER_MODULE(pcib, iodi, xlr_pcib_driver, pcib_devclass, 0, 0);
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