/*
* This file is subject to the terms and conditions of the GNU General Public
* License . See the file " COPYING " in the main directory of this archive
* for more details .
*
* Copyright ( C ) 2005 - 2009 Cavium Networks
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/time.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/swiotlb.h>
#include <asm /time.h>
#include <asm /octeon/octeon.h>
#include <asm /octeon/cvmx-npi-defs.h>
#include <asm /octeon/cvmx-pci-defs.h>
#include <asm /octeon/pci-octeon.h>
#define USE_OCTEON_INTERNAL_ARBITER
/*
* Octeon ' s PCI controller uses did = 3 , subdid = 2 for PCI IO
* addresses . Use PCI endian swapping 1 so no address swapping is
* necessary . The Linux io routines will endian swap the data .
*/
#define OCTEON_PCI_IOSPACE_BASE 0 x80011a0400000000ull
#define OCTEON_PCI_IOSPACE_SIZE (1 ull<<32 )
/* Octeon't PCI controller uses did=3, subdid=3 for PCI memory. */
#define OCTEON_PCI_MEMSPACE_OFFSET (0 x00011b0000000000ull)
u64 octeon_bar1_pci_phys;
/**
* This is the bit decoding used for the Octeon PCI controller addresses
*/
union octeon_pci_address {
uint64_t u64;
struct {
uint64_t upper:2 ;
uint64_t reserved:13 ;
uint64_t io:1 ;
uint64_t did:5 ;
uint64_t subdid:3 ;
uint64_t reserved2:4 ;
uint64_t endian_swap:2 ;
uint64_t reserved3:10 ;
uint64_t bus:8 ;
uint64_t dev:5 ;
uint64_t func:3 ;
uint64_t reg:8 ;
} s;
};
int (*octeon_pcibios_map_irq)(const struct pci_dev *dev, u8 slot, u8 pin);
enum octeon_dma_bar_type octeon_dma_bar_type = OCTEON_DMA_BAR_TYPE_INVALID;
/**
* Map a PCI device to the appropriate interrupt line
*
* @ dev : The Linux PCI device structure for the device to map
* @ slot : The slot number for this device on _ _ BUS 0 _ _ . Linux
* enumerates through all the bridges and figures out the
* slot on Bus 0 where this device eventually hooks to .
* @ pin : The PCI interrupt pin read from the device , then swizzled
* as it goes through each bridge .
* Returns Interrupt number for the device
*/
int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
if (octeon_pcibios_map_irq)
return octeon_pcibios_map_irq(dev, slot, pin);
else
panic("octeon_pcibios_map_irq not set." );
}
/*
* Called to perform platform specific PCI setup
*/
int pcibios_plat_dev_init(struct pci_dev *dev)
{
uint16_t config;
uint32_t dconfig;
int pos;
/*
* Force the Cache line setting to 64 bytes . The standard
* Linux bus scan doesn ' t seem to set it . Octeon really has
* 128 byte lines , but Intel bridges get really upset if you
* try and set values above 64 bytes . Value is specified in
* 32 bit words .
*/
pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 64 / 4 );
/* Set latency timers for all devices */
pci_write_config_byte(dev, PCI_LATENCY_TIMER, 64 );
/* Enable reporting System errors and parity errors on all devices */
/* Enable parity checking and error reporting */
pci_read_config_word(dev, PCI_COMMAND, &config);
config |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
pci_write_config_word(dev, PCI_COMMAND, config);
if (dev->subordinate) {
/* Set latency timers on sub bridges */
pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, 64 );
/* More bridge error detection */
pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &config);
config |= PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR;
pci_write_config_word(dev, PCI_BRIDGE_CONTROL, config);
}
/* Enable the PCIe normal error reporting */
config = PCI_EXP_DEVCTL_CERE; /* Correctable Error Reporting */
config |= PCI_EXP_DEVCTL_NFERE; /* Non-Fatal Error Reporting */
config |= PCI_EXP_DEVCTL_FERE; /* Fatal Error Reporting */
config |= PCI_EXP_DEVCTL_URRE; /* Unsupported Request */
pcie_capability_set_word(dev, PCI_EXP_DEVCTL, config);
/* Find the Advanced Error Reporting capability */
pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
if (pos) {
/* Clear Uncorrectable Error Status */
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,
&dconfig);
pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,
dconfig);
/* Enable reporting of all uncorrectable errors */
/* Uncorrectable Error Mask - turned on bits disable errors */
pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, 0 );
/*
* Leave severity at HW default . This only controls if
* errors are reported as uncorrectable or
* correctable , not if the error is reported .
*/
/* PCI_ERR_UNCOR_SEVER - Uncorrectable Error Severity */
/* Clear Correctable Error Status */
pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS, &dconfig);
pci_write_config_dword(dev, pos + PCI_ERR_COR_STATUS, dconfig);
/* Enable reporting of all correctable errors */
/* Correctable Error Mask - turned on bits disable errors */
pci_write_config_dword(dev, pos + PCI_ERR_COR_MASK, 0 );
/* Advanced Error Capabilities */
pci_read_config_dword(dev, pos + PCI_ERR_CAP, &dconfig);
/* ECRC Generation Enable */
if (config & PCI_ERR_CAP_ECRC_GENC)
config |= PCI_ERR_CAP_ECRC_GENE;
/* ECRC Check Enable */
if (config & PCI_ERR_CAP_ECRC_CHKC)
config |= PCI_ERR_CAP_ECRC_CHKE;
pci_write_config_dword(dev, pos + PCI_ERR_CAP, dconfig);
/* PCI_ERR_HEADER_LOG - Header Log Register (16 bytes) */
/* Report all errors to the root complex */
pci_write_config_dword(dev, pos + PCI_ERR_ROOT_COMMAND,
PCI_ERR_ROOT_CMD_COR_EN |
PCI_ERR_ROOT_CMD_NONFATAL_EN |
PCI_ERR_ROOT_CMD_FATAL_EN);
/* Clear the Root status register */
pci_read_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, &dconfig);
pci_write_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, dconfig);
}
return 0 ;
}
/**
* Return the mapping of PCI device number to IRQ line . Each
* character in the return string represents the interrupt
* line for the device at that position . Device 1 maps to the
* first character , etc . The characters A - D are used for PCI
* interrupts .
*
* Returns PCI interrupt mapping
*/
const char *octeon_get_pci_interrupts(void )
{
/*
* Returning an empty string causes the interrupts to be
* routed based on the PCI specification . From the PCI spec :
*
* INTA # of Device Number 0 is connected to IRQW on the system
* board . ( Device Number has no significance regarding being
* located on the system board or in a connector . ) INTA # of
* Device Number 1 is connected to IRQX on the system
* board . INTA # of Device Number 2 is connected to IRQY on the
* system board . INTA # of Device Number 3 is connected to IRQZ
* on the system board . The table below describes how each
* agent ' s INTx # lines are connected to the system board
* interrupt lines . The following equation can be used to
* determine to which INTx # signal on the system board a given
* device ' s INTx # line ( s ) is connected .
*
* MB = ( D + I ) MOD 4 MB = System board Interrupt ( IRQW = 0 ,
* IRQX = 1 , IRQY = 2 , and IRQZ = 3 ) D = Device Number I =
* Interrupt Number ( INTA # = 0 , INTB # = 1 , INTC # = 2 , and
* INTD # = 3 )
*/
if (of_machine_is_compatible("dlink,dsr-500n" ))
return "CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC" ;
switch (octeon_bootinfo->board_type) {
case CVMX_BOARD_TYPE_NAO38:
/* This is really the NAC38 */
return "AAAAADABAAAAAAAAAAAAAAAAAAAAAAAA" ;
case CVMX_BOARD_TYPE_EBH3100:
case CVMX_BOARD_TYPE_CN3010_EVB_HS5:
case CVMX_BOARD_TYPE_CN3005_EVB_HS5:
return "AAABAAAAAAAAAAAAAAAAAAAAAAAAAAAA" ;
case CVMX_BOARD_TYPE_BBGW_REF:
return "AABCD" ;
case CVMX_BOARD_TYPE_CUST_DSR1000N:
return "CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC" ;
case CVMX_BOARD_TYPE_THUNDER:
case CVMX_BOARD_TYPE_EBH3000:
default :
return "" ;
}
}
/**
* Map a PCI device to the appropriate interrupt line
*
* @ dev : The Linux PCI device structure for the device to map
* @ slot : The slot number for this device on _ _ BUS 0 _ _ . Linux
* enumerates through all the bridges and figures out the
* slot on Bus 0 where this device eventually hooks to .
* @ pin : The PCI interrupt pin read from the device , then swizzled
* as it goes through each bridge .
* Returns Interrupt number for the device
*/
int __init octeon_pci_pcibios_map_irq(const struct pci_dev *dev,
u8 slot, u8 pin)
{
int irq_num;
const char *interrupts;
int dev_num;
/* Get the board specific interrupt mapping */
interrupts = octeon_get_pci_interrupts();
dev_num = dev->devfn >> 3 ;
if (dev_num < strlen(interrupts))
irq_num = ((interrupts[dev_num] - 'A' + pin - 1 ) & 3 ) +
OCTEON_IRQ_PCI_INT0;
else
irq_num = ((slot + pin - 3 ) & 3 ) + OCTEON_IRQ_PCI_INT0;
return irq_num;
}
/*
* Read a value from configuration space
*/
static int octeon_read_config(struct pci_bus *bus, unsigned int devfn,
int reg, int size, u32 *val)
{
union octeon_pci_address pci_addr;
pci_addr.u64 = 0 ;
pci_addr.s.upper = 2 ;
pci_addr.s.io = 1 ;
pci_addr.s.did = 3 ;
pci_addr.s.subdid = 1 ;
pci_addr.s.endian_swap = 1 ;
pci_addr.s.bus = bus->number;
pci_addr.s.dev = devfn >> 3 ;
pci_addr.s.func = devfn & 0 x7;
pci_addr.s.reg = reg;
switch (size) {
case 4 :
*val = le32_to_cpu(cvmx_read64_uint32(pci_addr.u64));
return PCIBIOS_SUCCESSFUL;
case 2 :
*val = le16_to_cpu(cvmx_read64_uint16(pci_addr.u64));
return PCIBIOS_SUCCESSFUL;
case 1 :
*val = cvmx_read64_uint8(pci_addr.u64);
return PCIBIOS_SUCCESSFUL;
}
return PCIBIOS_FUNC_NOT_SUPPORTED;
}
/*
* Write a value to PCI configuration space
*/
static int octeon_write_config(struct pci_bus *bus, unsigned int devfn,
int reg, int size, u32 val)
{
union octeon_pci_address pci_addr;
pci_addr.u64 = 0 ;
pci_addr.s.upper = 2 ;
pci_addr.s.io = 1 ;
pci_addr.s.did = 3 ;
pci_addr.s.subdid = 1 ;
pci_addr.s.endian_swap = 1 ;
pci_addr.s.bus = bus->number;
pci_addr.s.dev = devfn >> 3 ;
pci_addr.s.func = devfn & 0 x7;
pci_addr.s.reg = reg;
switch (size) {
case 4 :
cvmx_write64_uint32(pci_addr.u64, cpu_to_le32(val));
return PCIBIOS_SUCCESSFUL;
case 2 :
cvmx_write64_uint16(pci_addr.u64, cpu_to_le16(val));
return PCIBIOS_SUCCESSFUL;
case 1 :
cvmx_write64_uint8(pci_addr.u64, val);
return PCIBIOS_SUCCESSFUL;
}
return PCIBIOS_FUNC_NOT_SUPPORTED;
}
static struct pci_ops octeon_pci_ops = {
.read = octeon_read_config,
.write = octeon_write_config,
};
static struct resource octeon_pci_mem_resource = {
.start = 0 ,
.end = 0 ,
.name = "Octeon PCI MEM" ,
.flags = IORESOURCE_MEM,
};
/*
* PCI ports must be above 16 KB so the ISA bus filtering in the PCI - X to PCI
* bridge
*/
static struct resource octeon_pci_io_resource = {
.start = 0 x4000,
.end = OCTEON_PCI_IOSPACE_SIZE - 1 ,
.name = "Octeon PCI IO" ,
.flags = IORESOURCE_IO,
};
static struct pci_controller octeon_pci_controller = {
.pci_ops = &octeon_pci_ops,
.mem_resource = &octeon_pci_mem_resource,
.mem_offset = OCTEON_PCI_MEMSPACE_OFFSET,
.io_resource = &octeon_pci_io_resource,
.io_offset = 0 ,
.io_map_base = OCTEON_PCI_IOSPACE_BASE,
};
/*
* Low level initialize the Octeon PCI controller
*/
static void octeon_pci_initialize(void )
{
union cvmx_pci_cfg01 cfg01;
union cvmx_npi_ctl_status ctl_status;
union cvmx_pci_ctl_status_2 ctl_status_2;
union cvmx_pci_cfg19 cfg19;
union cvmx_pci_cfg16 cfg16;
union cvmx_pci_cfg22 cfg22;
union cvmx_pci_cfg56 cfg56;
/* Reset the PCI Bus */
cvmx_write_csr(CVMX_CIU_SOFT_PRST, 0 x1);
cvmx_read_csr(CVMX_CIU_SOFT_PRST);
udelay(2000 ); /* Hold PCI reset for 2 ms */
ctl_status.u64 = 0 ; /* cvmx_read_csr(CVMX_NPI_CTL_STATUS); */
ctl_status.s.max_word = 1 ;
ctl_status.s.timer = 1 ;
cvmx_write_csr(CVMX_NPI_CTL_STATUS, ctl_status.u64);
/* Deassert PCI reset and advertise PCX Host Mode Device Capability
(64b) */
cvmx_write_csr(CVMX_CIU_SOFT_PRST, 0 x4);
cvmx_read_csr(CVMX_CIU_SOFT_PRST);
udelay(2000 ); /* Wait 2 ms after deasserting PCI reset */
ctl_status_2.u32 = 0 ;
ctl_status_2.s.tsr_hwm = 1 ; /* Initializes to 0. Must be set
before any PCI reads. */
ctl_status_2.s.bar2pres = 1 ; /* Enable BAR2 */
ctl_status_2.s.bar2_enb = 1 ;
ctl_status_2.s.bar2_cax = 1 ; /* Don't use L2 */
ctl_status_2.s.bar2_esx = 1 ;
ctl_status_2.s.pmo_amod = 1 ; /* Round robin priority */
if (octeon_dma_bar_type == OCTEON_DMA_BAR_TYPE_BIG) {
/* BAR1 hole */
ctl_status_2.s.bb1_hole = OCTEON_PCI_BAR1_HOLE_BITS;
ctl_status_2.s.bb1_siz = 1 ; /* BAR1 is 2GB */
ctl_status_2.s.bb_ca = 1 ; /* Don't use L2 with big bars */
ctl_status_2.s.bb_es = 1 ; /* Big bar in byte swap mode */
ctl_status_2.s.bb1 = 1 ; /* BAR1 is big */
ctl_status_2.s.bb0 = 1 ; /* BAR0 is big */
}
octeon_npi_write32(CVMX_NPI_PCI_CTL_STATUS_2, ctl_status_2.u32);
udelay(2000 ); /* Wait 2 ms before doing PCI reads */
ctl_status_2.u32 = octeon_npi_read32(CVMX_NPI_PCI_CTL_STATUS_2);
pr_notice("PCI Status: %s %s-bit\n" ,
ctl_status_2.s.ap_pcix ? "PCI-X" : "PCI" ,
ctl_status_2.s.ap_64ad ? "64" : "32" );
if (OCTEON_IS_MODEL(OCTEON_CN58XX) || OCTEON_IS_MODEL(OCTEON_CN50XX)) {
union cvmx_pci_cnt_reg cnt_reg_start;
union cvmx_pci_cnt_reg cnt_reg_end;
unsigned long cycles, pci_clock;
cnt_reg_start.u64 = cvmx_read_csr(CVMX_NPI_PCI_CNT_REG);
cycles = read_c0_cvmcount();
udelay(1000 );
cnt_reg_end.u64 = cvmx_read_csr(CVMX_NPI_PCI_CNT_REG);
cycles = read_c0_cvmcount() - cycles;
pci_clock = (cnt_reg_end.s.pcicnt - cnt_reg_start.s.pcicnt) /
(cycles / (mips_hpt_frequency / 1000000 ));
pr_notice("PCI Clock: %lu MHz\n" , pci_clock);
}
/*
* TDOMC must be set to one in PCI mode . TDOMC should be set to 4
* in PCI - X mode to allow four outstanding splits . Otherwise ,
* should not change from its reset value . Don ' t write PCI_CFG19
* in PCI mode ( 0 x82000001 reset value ) , write it to 0 x82000004
* after PCI - X mode is known . MRBCI , MDWE , MDRE - > must be zero .
* MRBCM - > must be one .
*/
if (ctl_status_2.s.ap_pcix) {
cfg19.u32 = 0 ;
/*
* Target Delayed / Split request outstanding maximum
* count . [ 1 . . 31 ] and 0 = 32 . NOTE : If the user
* programs these bits beyond the Designed Maximum
* outstanding count , then the designed maximum table
* depth will be used instead . No additional
* Deferred / Split transactions will be accepted if
* this outstanding maximum count is
* reached . Furthermore , no additional deferred / split
* transactions will be accepted if the I / O delay / I / O
* Split Request outstanding maximum is reached .
*/
cfg19.s.tdomc = 4 ;
/*
* Master Deferred Read Request Outstanding Max Count
* ( PCI only ) . CR4C [ 26 : 24 ] Max SAC cycles MAX DAC
* cycles 000 8 4 001 1 0 010 2 1 011 3 1 100 4 2 101
* 5 2 110 6 3 111 7 3 For example , if these bits are
* programmed to 100 , the core can support 2 DAC
* cycles , 4 SAC cycles or a combination of 1 DAC and
* 2 SAC cycles . NOTE : For the PCI - X maximum
* outstanding split transactions , refer to
* CRE0 [ 22 : 20 ] .
*/
cfg19.s.mdrrmc = 2 ;
/*
* Master Request ( Memory Read ) Byte Count / Byte Enable
* select . 0 = Byte Enables valid . In PCI mode , a
* burst transaction cannot be performed using Memory
* Read command = 4 ? h6 . 1 = DWORD Byte Count valid
* ( default ) . In PCI Mode , the memory read byte
* enables are automatically generated by the
* core . Note : N3 Master Request transaction sizes are
* always determined through the
* am_attr [ < 35 : 32 > | < 7 : 0 > ] field .
*/
cfg19.s.mrbcm = 1 ;
octeon_npi_write32(CVMX_NPI_PCI_CFG19, cfg19.u32);
}
cfg01.u32 = 0 ;
cfg01.s.msae = 1 ; /* Memory Space Access Enable */
cfg01.s.me = 1 ; /* Master Enable */
cfg01.s.pee = 1 ; /* PERR# Enable */
cfg01.s.see = 1 ; /* System Error Enable */
cfg01.s.fbbe = 1 ; /* Fast Back to Back Transaction Enable */
octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32);
#ifdef USE_OCTEON_INTERNAL_ARBITER
/*
* When OCTEON is a PCI host , most systems will use OCTEON ' s
* internal arbiter , so must enable it before any PCI / PCI - X
* traffic can occur .
*/
{
union cvmx_npi_pci_int_arb_cfg pci_int_arb_cfg;
pci_int_arb_cfg.u64 = 0 ;
pci_int_arb_cfg.s.en = 1 ; /* Internal arbiter enable */
cvmx_write_csr(CVMX_NPI_PCI_INT_ARB_CFG, pci_int_arb_cfg.u64);
}
#endif /* USE_OCTEON_INTERNAL_ARBITER */
/*
* Preferably written to 1 to set MLTD . [ RDSATI , TRTAE ,
* TWTAE , TMAE , DPPMR - > must be zero . TILT - > must not be set to
* 1 . . 7 .
*/
cfg16.u32 = 0 ;
cfg16.s.mltd = 1 ; /* Master Latency Timer Disable */
octeon_npi_write32(CVMX_NPI_PCI_CFG16, cfg16.u32);
/*
* Should be written to 0 x4ff00 . MTTV - > must be zero .
* FLUSH - > must be 1 . MRV - > should be 0 xFF .
*/
cfg22.u32 = 0 ;
/* Master Retry Value [1..255] and 0=infinite */
cfg22.s.mrv = 0 xff;
/*
* AM_DO_FLUSH_I control NOTE : This bit MUST BE ONE for proper
* N3K operation .
*/
cfg22.s.flush = 1 ;
octeon_npi_write32(CVMX_NPI_PCI_CFG22, cfg22.u32);
/*
* MOST Indicates the maximum number of outstanding splits ( in - 1
* notation ) when OCTEON is in PCI - X mode . PCI - X performance is
* affected by the MOST selection . Should generally be written
* with one of 0 x3be807 , 0 x2be807 , 0 x1be807 , or 0 x0be807 ,
* depending on the desired MOST of 3 , 2 , 1 , or 0 , respectively .
*/
cfg56.u32 = 0 ;
cfg56.s.pxcid = 7 ; /* RO - PCI-X Capability ID */
cfg56.s.ncp = 0 xe8; /* RO - Next Capability Pointer */
cfg56.s.dpere = 1 ; /* Data Parity Error Recovery Enable */
cfg56.s.roe = 1 ; /* Relaxed Ordering Enable */
cfg56.s.mmbc = 1 ; /* Maximum Memory Byte Count
[0=512B,1=1024B,2=2048B,3=4096B] */
cfg56.s.most = 3 ; /* Maximum outstanding Split transactions [0=1
.. 7=32] */
octeon_npi_write32(CVMX_NPI_PCI_CFG56, cfg56.u32);
/*
* Affects PCI performance when OCTEON services reads to its
* BAR1 / BAR2 . Refer to Section 10 . 6 . 1 . The recommended values are
* 0 x22 , 0 x33 , and 0 x33 for PCI_READ_CMD_6 , PCI_READ_CMD_C , and
* PCI_READ_CMD_E , respectively . Unfortunately due to errata DDR - 700 ,
* these values need to be changed so they won ' t possibly prefetch off
* of the end of memory if PCI is DMAing a buffer at the end of
* memory . Note that these values differ from their reset values .
*/
octeon_npi_write32(CVMX_NPI_PCI_READ_CMD_6, 0 x21);
octeon_npi_write32(CVMX_NPI_PCI_READ_CMD_C, 0 x31);
octeon_npi_write32(CVMX_NPI_PCI_READ_CMD_E, 0 x31);
}
/*
* Initialize the Octeon PCI controller
*/
static int __init octeon_pci_setup(void )
{
union cvmx_npi_mem_access_subidx mem_access;
int index;
/* Only these chips have PCI */
if (octeon_has_feature(OCTEON_FEATURE_PCIE))
return 0 ;
if (!octeon_is_pci_host()) {
pr_notice("Not in host mode, PCI Controller not initialized\n" );
return 0 ;
}
/* Point pcibios_map_irq() to the PCI version of it */
octeon_pcibios_map_irq = octeon_pci_pcibios_map_irq;
/* Only use the big bars on chips that support it */
if (OCTEON_IS_MODEL(OCTEON_CN31XX) ||
OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2) ||
OCTEON_IS_MODEL(OCTEON_CN38XX_PASS1))
octeon_dma_bar_type = OCTEON_DMA_BAR_TYPE_SMALL;
else
octeon_dma_bar_type = OCTEON_DMA_BAR_TYPE_BIG;
/* PCI I/O and PCI MEM values */
set_io_port_base(OCTEON_PCI_IOSPACE_BASE);
ioport_resource.start = 0 ;
ioport_resource.end = OCTEON_PCI_IOSPACE_SIZE - 1 ;
pr_notice("%s Octeon big bar support\n" ,
(octeon_dma_bar_type ==
OCTEON_DMA_BAR_TYPE_BIG) ? "Enabling" : "Disabling" );
octeon_pci_initialize();
mem_access.u64 = 0 ;
mem_access.s.esr = 1 ; /* Endian-Swap on read. */
mem_access.s.esw = 1 ; /* Endian-Swap on write. */
mem_access.s.nsr = 0 ; /* No-Snoop on read. */
mem_access.s.nsw = 0 ; /* No-Snoop on write. */
mem_access.s.ror = 0 ; /* Relax Read on read. */
mem_access.s.row = 0 ; /* Relax Order on write. */
mem_access.s.ba = 0 ; /* PCI Address bits [63:36]. */
cvmx_write_csr(CVMX_NPI_MEM_ACCESS_SUBID3, mem_access.u64);
/*
* Remap the Octeon BAR 2 above all 32 bit devices
* ( 0 x8000000000ul ) . This is done here so it is remapped
* before the readl ( ) ' s below . We don ' t want BAR2 overlapping
* with BAR0 / BAR1 during these reads .
*/
octeon_npi_write32(CVMX_NPI_PCI_CFG08,
(u32)(OCTEON_BAR2_PCI_ADDRESS & 0 xffffffffull));
octeon_npi_write32(CVMX_NPI_PCI_CFG09,
(u32)(OCTEON_BAR2_PCI_ADDRESS >> 32 ));
if (octeon_dma_bar_type == OCTEON_DMA_BAR_TYPE_BIG) {
/* Remap the Octeon BAR 0 to 0-2GB */
octeon_npi_write32(CVMX_NPI_PCI_CFG04, 0 );
octeon_npi_write32(CVMX_NPI_PCI_CFG05, 0 );
/*
* Remap the Octeon BAR 1 to map 2 GB - 4 GB ( minus the
* BAR 1 hole ) .
*/
octeon_npi_write32(CVMX_NPI_PCI_CFG06, 2 ul << 30 );
octeon_npi_write32(CVMX_NPI_PCI_CFG07, 0 );
/* BAR1 movable mappings set for identity mapping */
octeon_bar1_pci_phys = 0 x80000000ull;
for (index = 0 ; index < 32 ; index++) {
union cvmx_pci_bar1_indexx bar1_index;
bar1_index.u32 = 0 ;
/* Address bits[35:22] sent to L2C */
bar1_index.s.addr_idx =
(octeon_bar1_pci_phys >> 22 ) + index;
/* Don't put PCI accesses in L2. */
bar1_index.s.ca = 1 ;
/* Endian Swap Mode */
bar1_index.s.end_swp = 1 ;
/* Set '1' when the selected address range is valid. */
bar1_index.s.addr_v = 1 ;
octeon_npi_write32(CVMX_NPI_PCI_BAR1_INDEXX(index),
bar1_index.u32);
}
/* Devices go after BAR1 */
octeon_pci_mem_resource.start =
OCTEON_PCI_MEMSPACE_OFFSET + (4 ul << 30 ) -
(OCTEON_PCI_BAR1_HOLE_SIZE << 20 );
octeon_pci_mem_resource.end =
octeon_pci_mem_resource.start + (1 ul << 30 );
} else {
/* Remap the Octeon BAR 0 to map 128MB-(128MB+4KB) */
octeon_npi_write32(CVMX_NPI_PCI_CFG04, 128 ul << 20 );
octeon_npi_write32(CVMX_NPI_PCI_CFG05, 0 );
/* Remap the Octeon BAR 1 to map 0-128MB */
octeon_npi_write32(CVMX_NPI_PCI_CFG06, 0 );
octeon_npi_write32(CVMX_NPI_PCI_CFG07, 0 );
/* BAR1 movable regions contiguous to cover the swiotlb */
octeon_bar1_pci_phys =
default_swiotlb_base() & ~((1 ull << 22 ) - 1 );
for (index = 0 ; index < 32 ; index++) {
union cvmx_pci_bar1_indexx bar1_index;
bar1_index.u32 = 0 ;
/* Address bits[35:22] sent to L2C */
bar1_index.s.addr_idx =
(octeon_bar1_pci_phys >> 22 ) + index;
/* Don't put PCI accesses in L2. */
bar1_index.s.ca = 1 ;
/* Endian Swap Mode */
bar1_index.s.end_swp = 1 ;
/* Set '1' when the selected address range is valid. */
bar1_index.s.addr_v = 1 ;
octeon_npi_write32(CVMX_NPI_PCI_BAR1_INDEXX(index),
bar1_index.u32);
}
/* Devices go after BAR0 */
octeon_pci_mem_resource.start =
OCTEON_PCI_MEMSPACE_OFFSET + (128 ul << 20 ) +
(4 ul << 10 );
octeon_pci_mem_resource.end =
octeon_pci_mem_resource.start + (1 ul << 30 );
}
register_pci_controller(&octeon_pci_controller);
/*
* Clear any errors that might be pending from before the bus
* was setup properly .
*/
cvmx_write_csr(CVMX_NPI_PCI_INT_SUM2, -1 );
if (IS_ERR(platform_device_register_simple("octeon_pci_edac" ,
-1 , NULL, 0 )))
pr_err("Registration of co_pci_edac failed!\n" );
octeon_pci_dma_init();
return 0 ;
}
arch_initcall(octeon_pci_setup);
Messung V0.5 in Prozent C=85 H=90 G=87
¤ Dauer der Verarbeitung: 0.18 Sekunden
(vorverarbeitet am 2026-09-30)
¤
*© Formatika GbR, Deutschland