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u-boot/arch/mips/mach-octeon/cvmx-pcie.c
Heinrich Schuchardt 185f812c41 doc: replace @return by Return: 
Sphinx expects Return: and not @return to indicate a return value.

find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-01-19 18:11:34 +01:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2020 Marvell International Ltd.
*
* Interface to PCIe as a host(RC) or target(EP)
*/
#include <log.h>
#include <linux/delay.h>
#include <linux/libfdt.h>
#include <mach/cvmx-regs.h>
#include <mach/octeon-model.h>
#include <mach/cvmx-fuse.h>
#include <mach/octeon-feature.h>
#include <mach/cvmx-qlm.h>
#include <mach/octeon_qlm.h>
#include <mach/cvmx-helper-fdt.h>
#include <mach/cvmx-regs.h>
#include <mach/octeon-model.h>
#include <mach/cvmx-fuse.h>
#include <mach/octeon-feature.h>
#include <mach/cvmx-qlm.h>
#include <mach/octeon_qlm.h>
#include <mach/cvmx-pcie.h>
#include <mach/cvmx-error.h>
#include <mach/cvmx-helper.h>
#include <mach/cvmx-helper-util.h>
#include <mach/cvmx-bgxx-defs.h>
#include <mach/cvmx-ciu-defs.h>
#include <mach/cvmx-gmxx-defs.h>
#include <mach/cvmx-gserx-defs.h>
#include <mach/cvmx-mio-defs.h>
#include <mach/cvmx-pciercx-defs.h>
#include <mach/cvmx-pcieepx-defs.h>
#include <mach/cvmx-pemx-defs.h>
#include <mach/cvmx-pexp-defs.h>
#include <mach/cvmx-rst-defs.h>
#include <mach/cvmx-sata-defs.h>
#include <mach/cvmx-sli-defs.h>
#include <mach/cvmx-sriomaintx-defs.h>
#include <mach/cvmx-sriox-defs.h>
#include <mach/cvmx-dpi-defs.h>
#include <mach/cvmx-sli-defs.h>
#include <mach/cvmx-dtx-defs.h>
DECLARE_GLOBAL_DATA_PTR;
#define MRRS_CN6XXX 3 /* 1024 byte Max Read Request Size */
#define MPS_CN6XXX 0 /* 128 byte Max Packet Size (Limit of most PCs) */
/* Endian swap mode. */
#define _CVMX_PCIE_ES 1
#define CVMX_READ_CSR(addr) csr_rd_node(node, addr)
#define CVMX_WRITE_CSR(addr, val) csr_wr_node(node, addr, val)
#define CVMX_PCIE_CFGX_READ(p, addr) cvmx_pcie_cfgx_read_node(node, p, addr)
#define CVMX_PCIE_CFGX_WRITE(p, addr, val) cvmx_pcie_cfgx_write_node(node, p, addr, val)
/* #define DEBUG_PCIE */
/* Delay after link up, before issuing first configuration read */
#define PCIE_DEVICE_READY_WAIT_DELAY_MICROSECONDS 700000
/* Recommended Preset Vector: Drop Preset 10 */
int pcie_preset_vec[4] = { 0x593, 0x593, 0x593, 0x593 };
/* Number of LTSSM transitions to record, must be a power of 2 */
#define LTSSM_HISTORY_SIZE 64
#define MAX_RETRIES 2
bool pcie_link_initialized[CVMX_MAX_NODES][CVMX_PCIE_MAX_PORTS];
int cvmx_primary_pcie_bus_number = 1;
static uint32_t __cvmx_pcie_config_read32(int node, int pcie_port, int bus, int dev, int func,
int reg, int lst);
/**
* Return the Core virtual base address for PCIe IO access. IOs are
* read/written as an offset from this address.
*
* @param pcie_port PCIe port the IO is for
*
* Return: 64bit Octeon IO base address for read/write
*/
uint64_t cvmx_pcie_get_io_base_address(int pcie_port)
{
cvmx_pcie_address_t pcie_addr;
pcie_addr.u64 = 0;
pcie_addr.io.upper = 0;
pcie_addr.io.io = 1;
pcie_addr.io.did = 3;
pcie_addr.io.subdid = 2;
pcie_addr.io.node = (pcie_port >> 4) & 0x3;
pcie_addr.io.es = _CVMX_PCIE_ES;
pcie_addr.io.port = (pcie_port & 0x3);
return pcie_addr.u64;
}
/**
* Size of the IO address region returned at address
* cvmx_pcie_get_io_base_address()
*
* @param pcie_port PCIe port the IO is for
*
* Return: Size of the IO window
*/
uint64_t cvmx_pcie_get_io_size(int pcie_port)
{
return 1ull << 32;
}
/**
* Return the Core virtual base address for PCIe MEM access. Memory is
* read/written as an offset from this address.
*
* @param pcie_port PCIe port the IO is for
*
* Return: 64bit Octeon IO base address for read/write
*/
uint64_t cvmx_pcie_get_mem_base_address(int pcie_port)
{
cvmx_pcie_address_t pcie_addr;
pcie_addr.u64 = 0;
pcie_addr.mem.upper = 0;
pcie_addr.mem.io = 1;
pcie_addr.mem.did = 3;
pcie_addr.mem.subdid = 3 + (pcie_port & 0x3);
pcie_addr.mem.node = (pcie_port >> 4) & 0x3;
return pcie_addr.u64;
}
/**
* Size of the Mem address region returned at address
* cvmx_pcie_get_mem_base_address()
*
* @param pcie_port PCIe port the IO is for
*
* Return: Size of the Mem window
*/
uint64_t cvmx_pcie_get_mem_size(int pcie_port)
{
return 1ull << 36;
}
/**
* @INTERNAL
* Return the QLM number for the PCIE port.
*
* @param pcie_port QLM number to return for.
*
* Return: QLM number.
*/
static int __cvmx_pcie_get_qlm(int node, int pcie_port)
{
if (OCTEON_IS_MODEL(OCTEON_CN73XX)) {
cvmx_pemx_cfg_t pem_cfg;
cvmx_pemx_qlm_t pem_qlm;
cvmx_gserx_cfg_t gserx_cfg;
switch (pcie_port) {
case 0: /* PEM0 */
gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(0));
if (gserx_cfg.s.pcie)
return 0; /* PEM0 is on QLM0 and possibly QLM1 */
else
return -1; /* PEM0 is disabled */
case 1: /* PEM1 */
pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(0));
gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(1));
if (!pem_cfg.cn78xx.lanes8 && gserx_cfg.s.pcie)
return 1; /* PEM1 is on QLM 1 */
else
return -1; /* PEM1 is disabled */
case 2: /* PEM2 */
pem_qlm.u64 = CVMX_READ_CSR(CVMX_PEMX_QLM(2));
if (pem_qlm.cn73xx.pemdlmsel == 1) {
gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(5));
if (gserx_cfg.s.pcie)
return 5; /* PEM2 is on DLM5 */
else
return -1; /* PEM2 is disabled */
}
gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(2));
if (gserx_cfg.s.pcie)
return 2; /* PEM2 is on QLM2 and possibly QLM3 */
else
return -1; /* PEM2 is disabled */
case 3: /* PEM3 */
pem_qlm.u64 = CVMX_READ_CSR(CVMX_PEMX_QLM(3));
if (pem_qlm.cn73xx.pemdlmsel == 1) {
gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(6));
if (gserx_cfg.s.pcie)
return 6; /* PEM2 is on DLM5 */
else
return -1; /* PEM2 is disabled */
}
pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(2));
gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(3));
if (!pem_cfg.cn78xx.lanes8 && gserx_cfg.s.pcie)
return 3; /* PEM2 is on QLM2 and possibly QLM3 */
else
return -1; /* PEM2 is disabled */
default:
printf("Invalid %d PCIe port\n", pcie_port);
return -2;
}
} else if (OCTEON_IS_MODEL(OCTEON_CN78XX)) {
cvmx_pemx_cfg_t pem_cfg;
cvmx_gserx_cfg_t gserx_cfg;
switch (pcie_port) {
case 0:
gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(0));
if (gserx_cfg.s.pcie)
return 0; /* PEM0 is on QLM0 and possibly QLM1 */
else
return -1; /* PEM0 is disabled */
case 1: /* PEM1 */
pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(0));
gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(1));
if (!pem_cfg.cn78xx.lanes8 && gserx_cfg.s.pcie)
return 1; /* PEM1 is on QLM 1 */
else
return -1; /* PEM1 is disabled */
case 2: /* PEM2 */
gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(2));
if (gserx_cfg.s.pcie)
return 2; /* PEM2 is on QLM2 and possibly QLM3 */
else
return -1; /* PEM2 is disabled */
case 3: /* PEM3 */
{
cvmx_gserx_cfg_t gser4_cfg;
pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(2));
gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(3));
gser4_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(4));
if (pem_cfg.cn78xx.lanes8) {
if (gser4_cfg.s.pcie)
return 4; /* PEM3 is on QLM4 */
else
return -1; /* PEM3 is disabled */
} else {
if (gserx_cfg.s.pcie)
return 3; /* PEM3 is on QLM3 */
else if (gser4_cfg.s.pcie)
return 4; /* PEM3 is on QLM4 */
else
return -1; /* PEM3 is disabled */
}
}
default:
printf("Invalid %d PCIe port\n", pcie_port);
return -1;
}
} else if (OCTEON_IS_MODEL(OCTEON_CN70XX)) {
enum cvmx_qlm_mode mode1 = cvmx_qlm_get_mode(1);
enum cvmx_qlm_mode mode2 = cvmx_qlm_get_mode(2);
switch (pcie_port) {
case 0: /* PCIe0 can be DLM1 with 1, 2 or 4 lanes */
if (mode1 == CVMX_QLM_MODE_PCIE || /* Using DLM 1-2 */
mode1 == CVMX_QLM_MODE_PCIE_1X2 || /* Using DLM 1 */
mode1 == CVMX_QLM_MODE_PCIE_2X1 || /* Using DLM 1, lane 0 */
mode1 == CVMX_QLM_MODE_PCIE_1X1) /* Using DLM 1, l0, l1 not used */
return 1;
else
return -1;
case 1: /* PCIe1 can be DLM1 1 lane(1), DLM2 1 lane(0) or 2 lanes(0-1) */
if (mode1 == CVMX_QLM_MODE_PCIE_2X1)
return 1;
else if (mode2 == CVMX_QLM_MODE_PCIE_1X2)
return 2;
else if (mode2 == CVMX_QLM_MODE_PCIE_2X1)
return 2;
else
return -1;
case 2: /* PCIe2 can be DLM2 1 lanes(1) */
if (mode2 == CVMX_QLM_MODE_PCIE_2X1)
return 2;
else
return -1;
default: /* Only three PEM blocks */
return -1;
}
} else if (OCTEON_IS_MODEL(OCTEON_CNF75XX)) {
cvmx_gserx_cfg_t gserx_cfg;
switch (pcie_port) {
case 0: /* PEM0 */
gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(0));
if (gserx_cfg.s.pcie)
return 0; /* PEM0 is on QLM0 and possibly QLM1 */
else
return -1; /* PEM0 is disabled */
case 1: /* PEM1 */
gserx_cfg.u64 = CVMX_READ_CSR(CVMX_GSERX_CFG(1));
if (gserx_cfg.s.pcie)
return 1; /* PEM1 is on DLM1 */
else
return -1; /* PEM1 is disabled */
default:
return -1;
}
}
return -1;
}
/**
* @INTERNAL
* Initialize the RC config space CSRs
*
* @param node node
* @param pcie_port PCIe port to initialize
*/
static void __cvmx_pcie_rc_initialize_config_space(int node, int pcie_port)
{
/* Max Payload Size (PCIE*_CFG030[MPS]) */
/* Max Read Request Size (PCIE*_CFG030[MRRS]) */
/* Relaxed-order, no-snoop enables (PCIE*_CFG030[RO_EN,NS_EN] */
/* Error Message Enables (PCIE*_CFG030[CE_EN,NFE_EN,FE_EN,UR_EN]) */
{
cvmx_pciercx_cfg030_t pciercx_cfg030;
pciercx_cfg030.u32 = CVMX_PCIE_CFGX_READ(pcie_port,
CVMX_PCIERCX_CFG030(pcie_port));
pciercx_cfg030.s.mps = MPS_CN6XXX;
pciercx_cfg030.s.mrrs = MRRS_CN6XXX;
/*
* Enable relaxed order processing. This will allow devices
* to affect read response ordering
*/
pciercx_cfg030.s.ro_en = 1;
/* Enable no snoop processing. Not used by Octeon */
pciercx_cfg030.s.ns_en = 1;
/* Correctable error reporting enable. */
pciercx_cfg030.s.ce_en = 1;
/* Non-fatal error reporting enable. */
pciercx_cfg030.s.nfe_en = 1;
/* Fatal error reporting enable. */
pciercx_cfg030.s.fe_en = 1;
/* Unsupported request reporting enable. */
pciercx_cfg030.s.ur_en = 1;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG030(pcie_port),
pciercx_cfg030.u32);
}
/*
* Max Payload Size (DPI_SLI_PRTX_CFG[MPS]) must match
* PCIE*_CFG030[MPS]
*/
/*
* Max Read Request Size (DPI_SLI_PRTX_CFG[MRRS]) must not exceed
* PCIE*_CFG030[MRRS]
*/
cvmx_dpi_sli_prtx_cfg_t prt_cfg;
cvmx_sli_s2m_portx_ctl_t sli_s2m_portx_ctl;
prt_cfg.u64 = CVMX_READ_CSR(CVMX_DPI_SLI_PRTX_CFG(pcie_port));
prt_cfg.s.mps = MPS_CN6XXX;
prt_cfg.s.mrrs = MRRS_CN6XXX;
/* Max outstanding load request. */
prt_cfg.s.molr = 32;
CVMX_WRITE_CSR(CVMX_DPI_SLI_PRTX_CFG(pcie_port), prt_cfg.u64);
sli_s2m_portx_ctl.u64 = CVMX_READ_CSR(CVMX_PEXP_SLI_S2M_PORTX_CTL(pcie_port));
if (!(OCTEON_IS_MODEL(OCTEON_CN78XX) || OCTEON_IS_MODEL(OCTEON_CN73XX) ||
OCTEON_IS_MODEL(OCTEON_CNF75XX)))
sli_s2m_portx_ctl.cn61xx.mrrs = MRRS_CN6XXX;
CVMX_WRITE_CSR(CVMX_PEXP_SLI_S2M_PORTX_CTL(pcie_port), sli_s2m_portx_ctl.u64);
/* ECRC Generation (PCIE*_CFG070[GE,CE]) */
{
cvmx_pciercx_cfg070_t pciercx_cfg070;
pciercx_cfg070.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG070(pcie_port));
pciercx_cfg070.s.ge = 1; /* ECRC generation enable. */
pciercx_cfg070.s.ce = 1; /* ECRC check enable. */
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG070(pcie_port), pciercx_cfg070.u32);
}
/* Access Enables (PCIE*_CFG001[MSAE,ME]) */
/* ME and MSAE should always be set. */
/* Interrupt Disable (PCIE*_CFG001[I_DIS]) */
/* System Error Message Enable (PCIE*_CFG001[SEE]) */
{
cvmx_pciercx_cfg001_t pciercx_cfg001;
pciercx_cfg001.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG001(pcie_port));
pciercx_cfg001.s.msae = 1; /* Memory space enable. */
pciercx_cfg001.s.me = 1; /* Bus master enable. */
pciercx_cfg001.s.i_dis = 1; /* INTx assertion disable. */
pciercx_cfg001.s.see = 1; /* SERR# enable */
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG001(pcie_port), pciercx_cfg001.u32);
}
/* Advanced Error Recovery Message Enables */
/* (PCIE*_CFG066,PCIE*_CFG067,PCIE*_CFG069) */
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG066(pcie_port), 0);
/* Use CVMX_PCIERCX_CFG067 hardware default */
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG069(pcie_port), 0);
/* Active State Power Management (PCIE*_CFG032[ASLPC]) */
{
cvmx_pciercx_cfg032_t pciercx_cfg032;
pciercx_cfg032.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG032(pcie_port));
pciercx_cfg032.s.aslpc = 0; /* Active state Link PM control. */
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG032(pcie_port), pciercx_cfg032.u32);
}
/* Link Width Mode (PCIERCn_CFG452[LME]) - Set during
* cvmx_pcie_rc_initialize_link()
*/
/* Primary Bus Number (PCIERCn_CFG006[PBNUM]) */
{
/* We set the primary bus number to 1 so IDT bridges are happy.
* They don't like zero
*/
cvmx_pciercx_cfg006_t pciercx_cfg006;
pciercx_cfg006.u32 = 0;
pciercx_cfg006.s.pbnum = cvmx_primary_pcie_bus_number;
pciercx_cfg006.s.sbnum = cvmx_primary_pcie_bus_number;
pciercx_cfg006.s.subbnum = cvmx_primary_pcie_bus_number;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG006(pcie_port), pciercx_cfg006.u32);
}
/* Memory-mapped I/O BAR (PCIERCn_CFG008) */
/* Most applications should disable the memory-mapped I/O BAR by */
/* setting PCIERCn_CFG008[ML_ADDR] < PCIERCn_CFG008[MB_ADDR] */
{
cvmx_pciercx_cfg008_t pciercx_cfg008;
pciercx_cfg008.u32 = 0;
pciercx_cfg008.s.mb_addr = 0x100;
pciercx_cfg008.s.ml_addr = 0;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG008(pcie_port), pciercx_cfg008.u32);
}
/* Prefetchable BAR (PCIERCn_CFG009,PCIERCn_CFG010,PCIERCn_CFG011) */
/* Most applications should disable the prefetchable BAR by setting */
/* PCIERCn_CFG011[UMEM_LIMIT],PCIERCn_CFG009[LMEM_LIMIT] < */
/* PCIERCn_CFG010[UMEM_BASE],PCIERCn_CFG009[LMEM_BASE] */
{
cvmx_pciercx_cfg009_t pciercx_cfg009;
cvmx_pciercx_cfg010_t pciercx_cfg010;
cvmx_pciercx_cfg011_t pciercx_cfg011;
pciercx_cfg009.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG009(pcie_port));
pciercx_cfg010.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG010(pcie_port));
pciercx_cfg011.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG011(pcie_port));
pciercx_cfg009.s.lmem_base = 0x100;
pciercx_cfg009.s.lmem_limit = 0;
pciercx_cfg010.s.umem_base = 0x100;
pciercx_cfg011.s.umem_limit = 0;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG009(pcie_port), pciercx_cfg009.u32);
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG010(pcie_port), pciercx_cfg010.u32);
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG011(pcie_port), pciercx_cfg011.u32);
}
/* System Error Interrupt Enables (PCIERCn_CFG035[SECEE,SEFEE,SENFEE]) */
/* PME Interrupt Enables (PCIERCn_CFG035[PMEIE]) */
{
cvmx_pciercx_cfg035_t pciercx_cfg035;
pciercx_cfg035.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG035(pcie_port));
pciercx_cfg035.s.secee = 1; /* System error on correctable error enable. */
pciercx_cfg035.s.sefee = 1; /* System error on fatal error enable. */
pciercx_cfg035.s.senfee = 1; /* System error on non-fatal error enable. */
pciercx_cfg035.s.pmeie = 1; /* PME interrupt enable. */
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG035(pcie_port), pciercx_cfg035.u32);
}
/* Advanced Error Recovery Interrupt Enables */
/* (PCIERCn_CFG075[CERE,NFERE,FERE]) */
{
cvmx_pciercx_cfg075_t pciercx_cfg075;
pciercx_cfg075.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG075(pcie_port));
pciercx_cfg075.s.cere = 1; /* Correctable error reporting enable. */
pciercx_cfg075.s.nfere = 1; /* Non-fatal error reporting enable. */
pciercx_cfg075.s.fere = 1; /* Fatal error reporting enable. */
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG075(pcie_port), pciercx_cfg075.u32);
}
/* HP Interrupt Enables (PCIERCn_CFG034[HPINT_EN], */
/* PCIERCn_CFG034[DLLS_EN,CCINT_EN]) */
{
cvmx_pciercx_cfg034_t pciercx_cfg034;
pciercx_cfg034.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG034(pcie_port));
pciercx_cfg034.s.hpint_en = 1; /* Hot-plug interrupt enable. */
pciercx_cfg034.s.dlls_en = 1; /* Data Link Layer state changed enable */
pciercx_cfg034.s.ccint_en = 1; /* Command completed interrupt enable. */
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG034(pcie_port), pciercx_cfg034.u32);
}
if (OCTEON_IS_MODEL(OCTEON_CN78XX) || OCTEON_IS_MODEL(OCTEON_CN73XX) ||
OCTEON_IS_MODEL(OCTEON_CNF75XX)) {
int qlm = __cvmx_pcie_get_qlm(node, pcie_port);
int speed = cvmx_qlm_get_gbaud_mhz(qlm);
cvmx_pemx_cfg_t pem_cfg;
cvmx_pciercx_cfg031_t cfg031;
cvmx_pciercx_cfg040_t cfg040;
cvmx_pciercx_cfg452_t cfg452;
cvmx_pciercx_cfg089_t cfg089;
cvmx_pciercx_cfg090_t cfg090;
cvmx_pciercx_cfg091_t cfg091;
cvmx_pciercx_cfg092_t cfg092;
cvmx_pciercx_cfg554_t cfg554;
/*
* Make sure the PEM agrees with GSERX about the speed
* its going to try
*/
switch (speed) {
case 2500: /* Gen1 */
pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(pcie_port));
pem_cfg.s.md = 0;
CVMX_WRITE_CSR(CVMX_PEMX_CFG(pcie_port), pem_cfg.u64);
/* Set the target link speed */
cfg040.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG040(pcie_port));
cfg040.s.tls = 1;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG040(pcie_port), cfg040.u32);
break;
case 5000: /* Gen2 */
pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(pcie_port));
pem_cfg.s.md = 1;
CVMX_WRITE_CSR(CVMX_PEMX_CFG(pcie_port), pem_cfg.u64);
/* Set the target link speed */
cfg040.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG040(pcie_port));
cfg040.s.tls = 2;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG040(pcie_port), cfg040.u32);
break;
case 8000: /* Gen3 */
pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(pcie_port));
pem_cfg.s.md = 2;
CVMX_WRITE_CSR(CVMX_PEMX_CFG(pcie_port), pem_cfg.u64);
/* Set the target link speed */
cfg040.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG040(pcie_port));
cfg040.s.tls = 3;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG040(pcie_port), cfg040.u32);
break;
default:
break;
}
/* Link Width Mode (PCIERCn_CFG452[LME]) */
pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(pcie_port));
cfg452.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG452(pcie_port));
if (qlm >= 5)
cfg452.s.lme = 0x3;
else
cfg452.s.lme = (pem_cfg.cn78xx.lanes8) ? 0xf : 0x7;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG452(pcie_port), cfg452.u32);
/* Errata PEM-25990 - Disable ASLPMS */
cfg031.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG031(pcie_port));
cfg031.s.aslpms = 0;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG031(pcie_port), cfg031.u32);
/* CFG554.PRV default changed from 16'h7ff to 16'h593. */
cfg554.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG554(pcie_port));
cfg554.s.prv = pcie_preset_vec[pcie_port];
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG554(pcie_port), cfg554.u32);
/* Errata PEM-26189 - Disable the 2ms timer on all chips */
cfg554.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG554(pcie_port));
cfg554.s.p23td = 1;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG554(pcie_port), cfg554.u32);
/* Errata PEM-21178 - Change the CFG[089-092] LxUTP & LxDTP defaults. */
cfg089.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG089(pcie_port));
cfg089.s.l1ddtp = 7;
cfg089.s.l1utp = 7;
cfg089.s.l0dtp = 7;
cfg089.s.l0utp = 7;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG089(pcie_port), cfg089.u32);
cfg090.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG090(pcie_port));
cfg090.s.l3dtp = 7;
cfg090.s.l3utp = 7;
cfg090.s.l2dtp = 7;
cfg090.s.l2utp = 7;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG090(pcie_port), cfg090.u32);
cfg091.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG091(pcie_port));
cfg091.s.l5dtp = 7;
cfg091.s.l5utp = 7;
cfg091.s.l4dtp = 7;
cfg091.s.l4utp = 7;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG091(pcie_port), cfg091.u32);
cfg092.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG092(pcie_port));
cfg092.s.l7dtp = 7;
cfg092.s.l7utp = 7;
cfg092.s.l6dtp = 7;
cfg092.s.l6utp = 7;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG092(pcie_port), cfg092.u32);
}
}
static void __cvmx_increment_ba(cvmx_sli_mem_access_subidx_t *pmas)
{
if (OCTEON_IS_MODEL(OCTEON_CN68XX))
pmas->cn68xx.ba++;
else
pmas->cn63xx.ba++;
}
/*
* milliseconds to retry PCIe cfg-space access:
* Value 32(unscaled) was recommended in HRM, but may be too small for
* some PCIe devices. This 200mS default should cover most devices,
* but can be extended by bootparam cvmx-pcie.cfg_timeout, or reduced
* to speed boot if it is known that no devices need so much time.
*/
static int cfg_timeout = 200;
static int cfg_retries(void)
{
static int cfg_ticks = -1;
if (cfg_ticks < 0) {
u64 nS = cfg_timeout * 1000000;
const int ceiling = 0xffff;
cfg_ticks = nS / (gd->bus_clk >> 16);
if (cfg_ticks > ceiling)
cfg_ticks = ceiling;
}
return cfg_ticks;
}
/**
* @INTERNAL
* Enable/Disable PEMX_PEMON.pemon based on the direction.
*
* @param node node
* @param pcie_port PCIe port
* @param direction 0 to disable, 1 to enable
*/
static void __cvmx_pcie_config_pemon(int node, int pcie_port, bool direction)
{
cvmx_pemx_on_t pemon;
pemon.u64 = CVMX_READ_CSR(CVMX_PEMX_ON(pcie_port));
pemon.s.pemon = direction;
CVMX_WRITE_CSR(CVMX_PEMX_ON(pcie_port), pemon.u64);
pemon.u64 = CVMX_READ_CSR(CVMX_PEMX_ON(pcie_port));
}
/**
* @INTERNAL
* De-assert GSER_PHY.phy_reset for a given qlm
*
* @param node node
* @param qlm qlm for a given PCIe port
*/
static void __cvmx_pcie_gser_phy_config(int node, int pcie_port, int qlm)
{
cvmx_pemx_cfg_t pem_cfg;
cvmx_gserx_phy_ctl_t ctrl;
int has_8lanes = 0;
int is_gen3 = 0;
ctrl.u64 = CVMX_READ_CSR(CVMX_GSERX_PHY_CTL(qlm));
/* Assert the reset */
ctrl.s.phy_reset = 1;
CVMX_WRITE_CSR(CVMX_GSERX_PHY_CTL(qlm), ctrl.u64);
pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(pcie_port));
udelay(10);
has_8lanes = pem_cfg.cn78xx.lanes8;
is_gen3 = pem_cfg.cn78xx.md >= 2;
if (has_8lanes) {
ctrl.u64 = CVMX_READ_CSR(CVMX_GSERX_PHY_CTL(qlm + 1));
ctrl.s.phy_reset = 1;
CVMX_WRITE_CSR(CVMX_GSERX_PHY_CTL(qlm + 1), ctrl.u64);
ctrl.u64 = CVMX_READ_CSR(CVMX_GSERX_PHY_CTL(qlm + 1));
}
ctrl.u64 = CVMX_READ_CSR(CVMX_GSERX_PHY_CTL(qlm));
udelay(10);
/* Deassert the reset */
ctrl.s.phy_reset = 0;
CVMX_WRITE_CSR(CVMX_GSERX_PHY_CTL(qlm), ctrl.u64);
pem_cfg.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG(pcie_port));
udelay(500);
if (has_8lanes) {
ctrl.u64 = CVMX_READ_CSR(CVMX_GSERX_PHY_CTL(qlm + 1));
ctrl.s.phy_reset = 0;
CVMX_WRITE_CSR(CVMX_GSERX_PHY_CTL(qlm + 1), ctrl.u64);
}
ctrl.u64 = CVMX_READ_CSR(CVMX_GSERX_PHY_CTL(qlm));
udelay(500);
/* Apply some erratas after PHY reset, only applies to PCIe GEN3 */
if (is_gen3) {
int i;
int high_qlm = has_8lanes ? qlm + 1 : qlm;
/* Apply workaround for Errata GSER-26150 */
if (OCTEON_IS_MODEL(OCTEON_CN73XX_PASS1_0)) {
for (i = qlm; i < high_qlm; i++) {
cvmx_gserx_glbl_pll_cfg_3_t pll_cfg_3;
cvmx_gserx_glbl_misc_config_1_t misc_config_1;
/* Update PLL parameters */
/*
* Step 1: Set
* GSER()_GLBL_PLL_CFG_3[PLL_VCTRL_SEL_LCVCO_VAL] = 0x2,
* and
* GSER()_GLBL_PLL_CFG_3[PCS_SDS_PLL_VCO_AMP] = 0
*/
pll_cfg_3.u64 = CVMX_READ_CSR(CVMX_GSERX_GLBL_PLL_CFG_3(i));
pll_cfg_3.s.pcs_sds_pll_vco_amp = 0;
pll_cfg_3.s.pll_vctrl_sel_lcvco_val = 2;
CVMX_WRITE_CSR(CVMX_GSERX_GLBL_PLL_CFG_3(i), pll_cfg_3.u64);
/*
* Step 2: Set
* GSER()_GLBL_MISC_CONFIG_1[PCS_SDS_TRIM_CHP_REG] = 0x2.
*/
misc_config_1.u64 = CVMX_READ_CSR(CVMX_GSERX_GLBL_MISC_CONFIG_1(i));
misc_config_1.s.pcs_sds_trim_chp_reg = 2;
CVMX_WRITE_CSR(CVMX_GSERX_GLBL_MISC_CONFIG_1(i), misc_config_1.u64);
}
}
/* Apply workaround for Errata GSER-25992 */
if (OCTEON_IS_MODEL(OCTEON_CN73XX_PASS1_X) ||
OCTEON_IS_MODEL(OCTEON_CN78XX_PASS1_X)) {
for (i = qlm; i < high_qlm; i++)
cvmx_qlm_gser_errata_25992(node, i);
}
}
}
/* Get the PCIe LTSSM state for the given port
*
* @param node Node to query
* @param pcie_port PEM to query
*
* Return: LTSSM state
*/
static int __cvmx_pcie_rc_get_ltssm_state(int node, int pcie_port)
{
u64 debug;
if (OCTEON_IS_MODEL(OCTEON_CN73XX) && pcie_port == 0) {
CVMX_WRITE_CSR(CVMX_DTX_SPEM_SELX(0), 0);
CVMX_READ_CSR(CVMX_DTX_SPEM_SELX(0));
CVMX_WRITE_CSR(CVMX_DTX_SPEM_ENAX(0), 0xfffffffffull);
CVMX_READ_CSR(CVMX_DTX_SPEM_ENAX(0));
/* Read the value */
debug = CVMX_READ_CSR(CVMX_DTX_SPEM_DATX(0));
/* Disable the PEM from driving OCLA signals */
CVMX_WRITE_CSR(CVMX_DTX_SPEM_ENAX(0), 0);
CVMX_READ_CSR(CVMX_DTX_SPEM_ENAX(0));
} else {
/* LTSSM state is in debug select 0 */
CVMX_WRITE_CSR(CVMX_DTX_PEMX_SELX(0, pcie_port), 0);
CVMX_READ_CSR(CVMX_DTX_PEMX_SELX(0, pcie_port));
CVMX_WRITE_CSR(CVMX_DTX_PEMX_ENAX(0, pcie_port), 0xfffffffffull);
CVMX_READ_CSR(CVMX_DTX_PEMX_ENAX(0, pcie_port));
/* Read the value */
debug = CVMX_READ_CSR(CVMX_DTX_PEMX_DATX(0, pcie_port));
/* Disable the PEM from driving OCLA signals */
CVMX_WRITE_CSR(CVMX_DTX_PEMX_ENAX(0, pcie_port), 0);
CVMX_READ_CSR(CVMX_DTX_PEMX_ENAX(0, pcie_port));
}
/* DBGSEL = 0x0, bits[8:3] */
return cvmx_bit_extract(debug, 3, 6);
}
/**
* Get the PCIe LTSSM state for the given port
*
* @param node Node to query
* @param pcie_port PEM to query
*
* Return: LTSSM state
*/
static const char *cvmx_pcie_get_ltssm_string(int ltssm)
{
switch (ltssm) {
case 0x00:
return "DETECT_QUIET";
case 0x01:
return "DETECT_ACT";
case 0x02:
return "POLL_ACTIVE";
case 0x03:
return "POLL_COMPLIANCE";
case 0x04:
return "POLL_CONFIG";
case 0x05:
return "PRE_DETECT_QUIET";
case 0x06:
return "DETECT_WAIT";
case 0x07:
return "CFG_LINKWD_START";
case 0x08:
return "CFG_LINKWD_ACEPT";
case 0x09:
return "CFG_LANENUM_WAIT";
case 0x0A:
return "CFG_LANENUM_ACEPT";
case 0x0B:
return "CFG_COMPLETE";
case 0x0C:
return "CFG_IDLE";
case 0x0D:
return "RCVRY_LOCK";
case 0x0E:
return "RCVRY_SPEED";
case 0x0F:
return "RCVRY_RCVRCFG";
case 0x10:
return "RCVRY_IDLE";
case 0x11:
return "L0";
case 0x12:
return "L0S";
case 0x13:
return "L123_SEND_EIDLE";
case 0x14:
return "L1_IDLE";
case 0x15:
return "L2_IDLE";
case 0x16:
return "L2_WAKE";
case 0x17:
return "DISABLED_ENTRY";
case 0x18:
return "DISABLED_IDLE";
case 0x19:
return "DISABLED";
case 0x1A:
return "LPBK_ENTRY";
case 0x1B:
return "LPBK_ACTIVE";
case 0x1C:
return "LPBK_EXIT";
case 0x1D:
return "LPBK_EXIT_TIMEOUT";
case 0x1E:
return "HOT_RESET_ENTRY";
case 0x1F:
return "HOT_RESET";
case 0x20:
return "RCVRY_EQ0";
case 0x21:
return "RCVRY_EQ1";
case 0x22:
return "RCVRY_EQ2";
case 0x23:
return "RCVRY_EQ3";
default:
return "Unknown";
}
}
/**
* During PCIe link initialization we need to make config request to the attached
* device to verify its speed and width. These config access happen very early
* after the device is taken out of reset, so may fail for some amount of time.
* This function automatically retries these config accesses. The normal builtin
* hardware retry isn't enough for this very early access.
*
* @param node Note to read from
* @param pcie_port PCIe port to read from
* @param bus PCIe bus number
* @param dev PCIe device
* @param func PCIe function on the device
* @param reg Register to read
*
* Return: Config register value, or all ones on failure
*/
static uint32_t cvmx_pcie_config_read32_retry(int node, int pcie_port, int bus, int dev, int func,
int reg)
{
/*
* Read the PCI config register until we get a valid value. Some cards
* require time after link up to return data. Wait at most 3 seconds
*/
u64 timeout = 300;
u32 val;
do {
/* Read PCI capability pointer */
val = __cvmx_pcie_config_read32(node, pcie_port, bus, dev, func, reg, 0);
/* Check the read succeeded */
if (val != 0xffffffff)
return val;
/* Failed, wait a little and try again */
mdelay(10);
} while (--timeout);
debug("N%d.PCIe%d: Config read failed, can't communicate with device\n",
node, pcie_port);
return -1;
}
/**
* @INTERNAL
* Initialize a host mode PCIe gen 2 link. This function takes a PCIe
* port from reset to a link up state. Software can then begin
* configuring the rest of the link.
*
* @param node node
* @param pcie_port PCIe port to initialize
*
* Return: Zero on success
*/
static int __cvmx_pcie_rc_initialize_link_gen2(int node, int pcie_port)
{
u64 start_cycle;
cvmx_pemx_ctl_status_t pem_ctl_status;
cvmx_pciercx_cfg032_t pciercx_cfg032;
cvmx_pciercx_cfg448_t pciercx_cfg448;
if (OCTEON_IS_OCTEON3()) {
if (CVMX_WAIT_FOR_FIELD64_NODE(node, CVMX_PEMX_ON(pcie_port), cvmx_pemx_on_t,
pemoor, ==, 1, 100000)) {
printf("%d:PCIe: Port %d PEM not on, skipping\n", node, pcie_port);
return -1;
}
}
/* Bring up the link */
pem_ctl_status.u64 = CVMX_READ_CSR(CVMX_PEMX_CTL_STATUS(pcie_port));
pem_ctl_status.s.lnk_enb = 1;
CVMX_WRITE_CSR(CVMX_PEMX_CTL_STATUS(pcie_port), pem_ctl_status.u64);
/* Wait for the link to come up */
start_cycle = get_timer(0);
do {
if (get_timer(start_cycle) > 1000)
return -1;
udelay(1000);
pciercx_cfg032.u32 = CVMX_PCIE_CFGX_READ(pcie_port,
CVMX_PCIERCX_CFG032(pcie_port));
} while ((pciercx_cfg032.s.dlla == 0) || (pciercx_cfg032.s.lt == 1));
/* Update the Replay Time Limit. Empirically, some PCIe devices take a
* little longer to respond than expected under load. As a workaround
* for this we configure the Replay Time Limit to the value expected
* for a 512 byte MPS instead of our actual 256 byte MPS. The numbers
* below are directly from the PCIe spec table 3-4
*/
pciercx_cfg448.u32 = CVMX_PCIE_CFGX_READ(pcie_port,
CVMX_PCIERCX_CFG448(pcie_port));
switch (pciercx_cfg032.s.nlw) {
case 1: /* 1 lane */
pciercx_cfg448.s.rtl = 1677;
break;
case 2: /* 2 lanes */
pciercx_cfg448.s.rtl = 867;
break;
case 4: /* 4 lanes */
pciercx_cfg448.s.rtl = 462;
break;
case 8: /* 8 lanes */
pciercx_cfg448.s.rtl = 258;
break;
}
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG448(pcie_port),
pciercx_cfg448.u32);
return 0;
}
extern int octeon_pcie_get_qlm_from_fdt(int numa_node, int pcie_port);
static int __cvmx_pcie_check_pcie_port(int node, int pcie_port, enum cvmx_qlm_mode mode)
{
if (mode == CVMX_QLM_MODE_SRIO_1X4 || mode == CVMX_QLM_MODE_SRIO_2X2 ||
mode == CVMX_QLM_MODE_SRIO_4X1) {
printf("%d:PCIe: Port %d is SRIO, skipping.\n", node, pcie_port);
return -1;
} else if (mode == CVMX_QLM_MODE_SGMII) {
printf("%d:PCIe: Port %d is SGMII, skipping.\n", node, pcie_port);
return -1;
} else if (mode == CVMX_QLM_MODE_XAUI || mode == CVMX_QLM_MODE_RXAUI) {
printf("%d:PCIe: Port %d is XAUI, skipping.\n", node, pcie_port);
return -1;
} else if (mode == CVMX_QLM_MODE_ILK) {
printf("%d:PCIe: Port %d is ILK, skipping.\n", node, pcie_port);
return -1;
} else if (mode != CVMX_QLM_MODE_PCIE &&
mode != CVMX_QLM_MODE_PCIE_1X8 &&
mode != CVMX_QLM_MODE_PCIE_1X2 &&
mode != CVMX_QLM_MODE_PCIE_2X1 &&
mode != CVMX_QLM_MODE_PCIE_1X1) {
printf("%d:PCIe: Port %d is unknown, skipping.\n",
node, pcie_port);
return -1;
}
return 0;
}
static int __cvmx_pcie_check_qlm_mode(int node, int pcie_port, int qlm)
{
enum cvmx_qlm_mode mode = CVMX_QLM_MODE_DISABLED;
if (qlm < 0)
return -1;
/* Make sure this interface is PCIe */
if (OCTEON_IS_MODEL(OCTEON_CN70XX)) {
if (cvmx_qlm_get_dlm_mode(1, pcie_port) ==
CVMX_QLM_MODE_DISABLED) {
printf("PCIe: Port %d not in PCIe mode, skipping\n",
pcie_port);
return -1;
}
} else if (octeon_has_feature(OCTEON_FEATURE_PCIE)) {
/*
* Requires reading the MIO_QLMX_CFG register to figure
* out the port type.
*/
if (OCTEON_IS_MODEL(OCTEON_CN68XX)) {
qlm = 3 - (pcie_port * 2);
} else if (OCTEON_IS_MODEL(OCTEON_CN61XX)) {
cvmx_mio_qlmx_cfg_t qlm_cfg;
qlm_cfg.u64 = csr_rd(CVMX_MIO_QLMX_CFG(1));
if (qlm_cfg.s.qlm_cfg == 1)
qlm = 1;
else
qlm = pcie_port;
} else if (OCTEON_IS_MODEL(OCTEON_CN66XX) ||
OCTEON_IS_MODEL(OCTEON_CN63XX)) {
qlm = pcie_port;
}
/*
* PCIe is allowed only in QLM1, 1 PCIe port in x2 or
* 2 PCIe ports in x1
*/
else if (OCTEON_IS_MODEL(OCTEON_CNF71XX))
qlm = 1;
mode = cvmx_qlm_get_mode(qlm);
__cvmx_pcie_check_pcie_port(node, pcie_port, mode);
}
return 0;
}
static void __cvmx_pcie_sli_config(int node, int pcie_port)
{
cvmx_pemx_bar_ctl_t pemx_bar_ctl;
cvmx_pemx_ctl_status_t pemx_ctl_status;
cvmx_sli_ctl_portx_t sli_ctl_portx;
cvmx_sli_mem_access_ctl_t sli_mem_access_ctl;
cvmx_sli_mem_access_subidx_t mem_access_subid;
cvmx_pemx_bar1_indexx_t bar1_index;
int i;
/* Store merge control (SLI_MEM_ACCESS_CTL[TIMER,MAX_WORD]) */
sli_mem_access_ctl.u64 = CVMX_READ_CSR(CVMX_PEXP_SLI_MEM_ACCESS_CTL);
sli_mem_access_ctl.s.max_word = 0; /* Allow 16 words to combine */
sli_mem_access_ctl.s.timer = 127; /* Wait up to 127 cycles for more data */
CVMX_WRITE_CSR(CVMX_PEXP_SLI_MEM_ACCESS_CTL, sli_mem_access_ctl.u64);
/* Setup Mem access SubDIDs */
mem_access_subid.u64 = 0;
mem_access_subid.s.port = pcie_port; /* Port the request is sent to. */
mem_access_subid.s.nmerge = 0; /* Allow merging as it works on CN6XXX. */
mem_access_subid.s.esr = _CVMX_PCIE_ES; /* Endian-swap for Reads. */
mem_access_subid.s.esw = _CVMX_PCIE_ES; /* Endian-swap for Writes. */
mem_access_subid.s.wtype = 0; /* "No snoop" and "Relaxed ordering" are not set */
mem_access_subid.s.rtype = 0; /* "No snoop" and "Relaxed ordering" are not set */
/* PCIe Address Bits <63:34>. */
if (OCTEON_IS_MODEL(OCTEON_CN68XX))
mem_access_subid.cn68xx.ba = 0;
else
mem_access_subid.cn63xx.ba = 0;
/* Setup mem access 12-15 for port 0, 16-19 for port 1, supplying 36
* bits of address space
*/
for (i = 12 + pcie_port * 4; i < 16 + pcie_port * 4; i++) {
CVMX_WRITE_CSR(CVMX_PEXP_SLI_MEM_ACCESS_SUBIDX(i), mem_access_subid.u64);
/* Set each SUBID to extend the addressable range */
__cvmx_increment_ba(&mem_access_subid);
}
if (OCTEON_IS_MODEL(OCTEON_CN63XX) || OCTEON_IS_MODEL(OCTEON_CN66XX) ||
OCTEON_IS_MODEL(OCTEON_CN68XX) ||
(OCTEON_IS_OCTEON3() && !OCTEON_IS_MODEL(OCTEON_CN70XX))) {
/* Disable the peer to peer forwarding register. This must be
* setup by the OS after it enumerates the bus and assigns
* addresses to the PCIe busses
*/
for (i = 0; i < 4; i++) {
CVMX_WRITE_CSR(CVMX_PEMX_P2P_BARX_START(i, pcie_port), -1);
CVMX_WRITE_CSR(CVMX_PEMX_P2P_BARX_END(i, pcie_port), -1);
}
}
/* Set Octeon's BAR0 to decode 0-16KB. It overlaps with Bar2 */
CVMX_WRITE_CSR(CVMX_PEMX_P2N_BAR0_START(pcie_port), 0);
/* Set Octeon's BAR2 to decode 0-2^41. Bar0 and Bar1 take precedence
* where they overlap. It also overlaps with the device addresses, so
* make sure the peer to peer forwarding is set right
*/
CVMX_WRITE_CSR(CVMX_PEMX_P2N_BAR2_START(pcie_port), 0);
/* Setup BAR2 attributes */
/* Relaxed Ordering (NPEI_CTL_PORTn[PTLP_RO,CTLP_RO, WAIT_COM]) */
/* - PTLP_RO,CTLP_RO should normally be set (except for debug). */
/* - WAIT_COM=0 will likely work for all applications. */
/* Load completion relaxed ordering (NPEI_CTL_PORTn[WAITL_COM]) */
pemx_bar_ctl.u64 = CVMX_READ_CSR(CVMX_PEMX_BAR_CTL(pcie_port));
pemx_bar_ctl.s.bar1_siz = 3; /* 256MB BAR1 */
pemx_bar_ctl.s.bar2_enb = 1;
pemx_bar_ctl.s.bar2_esx = _CVMX_PCIE_ES;
pemx_bar_ctl.s.bar2_cax = 0;
CVMX_WRITE_CSR(CVMX_PEMX_BAR_CTL(pcie_port), pemx_bar_ctl.u64);
sli_ctl_portx.u64 = CVMX_READ_CSR(CVMX_PEXP_SLI_CTL_PORTX(pcie_port));
sli_ctl_portx.s.ptlp_ro = 1;
sli_ctl_portx.s.ctlp_ro = 1;
sli_ctl_portx.s.wait_com = 0;
sli_ctl_portx.s.waitl_com = 0;
CVMX_WRITE_CSR(CVMX_PEXP_SLI_CTL_PORTX(pcie_port), sli_ctl_portx.u64);
/* BAR1 follows BAR2 */
CVMX_WRITE_CSR(CVMX_PEMX_P2N_BAR1_START(pcie_port),
CVMX_PCIE_BAR1_RC_BASE);
bar1_index.u64 = 0;
bar1_index.s.addr_idx = (CVMX_PCIE_BAR1_PHYS_BASE >> 22);
bar1_index.s.ca = 1; /* Not Cached */
bar1_index.s.end_swp = _CVMX_PCIE_ES; /* Endian Swap mode */
bar1_index.s.addr_v = 1; /* Valid entry */
for (i = 0; i < 16; i++) {
CVMX_WRITE_CSR(CVMX_PEMX_BAR1_INDEXX(i, pcie_port),
bar1_index.u64);
/* 256MB / 16 >> 22 == 4 */
bar1_index.s.addr_idx += (((1ull << 28) / 16ull) >> 22);
}
/* Wait for 200ms */
pemx_ctl_status.u64 = CVMX_READ_CSR(CVMX_PEMX_CTL_STATUS(pcie_port));
pemx_ctl_status.cn63xx.cfg_rtry = cfg_retries();
CVMX_WRITE_CSR(CVMX_PEMX_CTL_STATUS(pcie_port), pemx_ctl_status.u64);
/*
* Here is the second part of the config retry changes. Wait for 700ms
* after setting up the link before continuing. PCIe says the devices
* may need up to 900ms to come up. 700ms plus 200ms from above gives
* us a total of 900ms
*/
if (OCTEON_IS_OCTEON2() || OCTEON_IS_MODEL(OCTEON_CN70XX))
udelay(PCIE_DEVICE_READY_WAIT_DELAY_MICROSECONDS);
}
/**
* Initialize a PCIe gen 2 port for use in host(RC) mode. It doesn't enumerate
* the bus.
*
* @param pcie_port PCIe port to initialize
*
* Return: Zero on success
*/
static int __cvmx_pcie_rc_initialize_gen2(int pcie_port)
{
cvmx_ciu_soft_prst_t ciu_soft_prst;
cvmx_mio_rst_ctlx_t mio_rst_ctl;
cvmx_pemx_bist_status_t pemx_bist_status;
cvmx_pemx_bist_status2_t pemx_bist_status2;
cvmx_pciercx_cfg032_t pciercx_cfg032;
cvmx_pciercx_cfg515_t pciercx_cfg515;
u64 ciu_soft_prst_reg, rst_ctl_reg;
int ep_mode;
int qlm = 0;
int node = (pcie_port >> 4) & 0x3;
pcie_port &= 0x3;
if (pcie_port >= CVMX_PCIE_PORTS) {
//debug("Invalid PCIe%d port\n", pcie_port);
return -1;
}
if (__cvmx_pcie_check_qlm_mode(node, pcie_port, qlm))
return -1;
/* Make sure we aren't trying to setup a target mode interface in host
* mode
*/
if (OCTEON_IS_OCTEON3()) {
ciu_soft_prst_reg = CVMX_RST_SOFT_PRSTX(pcie_port);
rst_ctl_reg = CVMX_RST_CTLX(pcie_port);
} else {
ciu_soft_prst_reg = (pcie_port) ? CVMX_CIU_SOFT_PRST1 : CVMX_CIU_SOFT_PRST;
rst_ctl_reg = CVMX_MIO_RST_CTLX(pcie_port);
}
mio_rst_ctl.u64 = CVMX_READ_CSR(rst_ctl_reg);
ep_mode = ((OCTEON_IS_MODEL(OCTEON_CN61XX) || OCTEON_IS_MODEL(OCTEON_CNF71XX)) ?
(mio_rst_ctl.s.prtmode != 1) :
(!mio_rst_ctl.s.host_mode));
if (OCTEON_IS_MODEL(OCTEON_CN70XX) && pcie_port) {
cvmx_pemx_cfg_t pemx_cfg;
pemx_cfg.u64 = csr_rd(CVMX_PEMX_CFG(0));
if ((pemx_cfg.s.md & 3) == 2) {
printf("PCIe: Port %d in 1x4 mode.\n", pcie_port);
return -1;
}
}
if (ep_mode) {
printf("%d:PCIe: Port %d in endpoint mode.\n", node, pcie_port);
return -1;
}
/* CN63XX Pass 1.0 errata G-14395 requires the QLM De-emphasis be
* programmed
*/
if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_0)) {
if (pcie_port) {
cvmx_ciu_qlm1_t ciu_qlm;
ciu_qlm.u64 = csr_rd(CVMX_CIU_QLM1);
ciu_qlm.s.txbypass = 1;
ciu_qlm.s.txdeemph = 5;
ciu_qlm.s.txmargin = 0x17;
csr_wr(CVMX_CIU_QLM1, ciu_qlm.u64);
} else {
cvmx_ciu_qlm0_t ciu_qlm;
ciu_qlm.u64 = csr_rd(CVMX_CIU_QLM0);
ciu_qlm.s.txbypass = 1;
ciu_qlm.s.txdeemph = 5;
ciu_qlm.s.txmargin = 0x17;
csr_wr(CVMX_CIU_QLM0, ciu_qlm.u64);
}
}
/* Bring the PCIe out of reset */
ciu_soft_prst.u64 = CVMX_READ_CSR(ciu_soft_prst_reg);
/* After a chip reset the PCIe will also be in reset. If it
* isn't, most likely someone is trying to init it again
* without a proper PCIe reset.
*/
if (ciu_soft_prst.s.soft_prst == 0) {
/* Reset the port */
ciu_soft_prst.s.soft_prst = 1;
CVMX_WRITE_CSR(ciu_soft_prst_reg, ciu_soft_prst.u64);
/* Read to make sure write happens */
ciu_soft_prst.u64 = CVMX_READ_CSR(ciu_soft_prst_reg);
/* Keep PERST asserted for 2 ms */
udelay(2000);
}
/* Deassert PERST */
ciu_soft_prst.u64 = CVMX_READ_CSR(ciu_soft_prst_reg);
ciu_soft_prst.s.soft_prst = 0;
CVMX_WRITE_CSR(ciu_soft_prst_reg, ciu_soft_prst.u64);
ciu_soft_prst.u64 = CVMX_READ_CSR(ciu_soft_prst_reg);
/* Wait 1ms for PCIe reset to complete */
udelay(1000);
/* Set MPLL multiplier as per Errata 20669. */
if (OCTEON_IS_MODEL(OCTEON_CN70XX)) {
int qlm = __cvmx_pcie_get_qlm(0, pcie_port);
enum cvmx_qlm_mode mode;
int old_mult;
u64 meas_refclock = cvmx_qlm_measure_clock(qlm);
if (meas_refclock > 99000000 && meas_refclock < 101000000) {
old_mult = 35;
} else if (meas_refclock > 124000000 &&
meas_refclock < 126000000) {
old_mult = 56;
} else if (meas_refclock > 156000000 &&
meas_refclock < 156500000) {
old_mult = 45;
} else {
printf("%s: Invalid reference clock for qlm %d\n",
__func__, qlm);
return -1;
}
mode = cvmx_qlm_get_mode(qlm);
__cvmx_qlm_set_mult(qlm, 2500, old_mult);
/* Adjust mplls for both dlms when configured as pcie 1x4 */
if (mode == CVMX_QLM_MODE_PCIE && pcie_port == 0)
__cvmx_qlm_set_mult(qlm + 1, 2500, old_mult);
}
/*
* Check and make sure PCIe came out of reset. If it doesn't the board
* probably hasn't wired the clocks up and the interface should be
* skipped
*/
if (CVMX_WAIT_FOR_FIELD64_NODE(node, rst_ctl_reg, cvmx_mio_rst_ctlx_t,
rst_done, ==, 1, 10000)) {
printf("%d:PCIe: Port %d stuck in reset, skipping.\n", node, pcie_port);
return -1;
}
/* Check BIST status */
pemx_bist_status.u64 = CVMX_READ_CSR(CVMX_PEMX_BIST_STATUS(pcie_port));
if (pemx_bist_status.u64)
printf("%d:PCIe: BIST FAILED for port %d (0x%016llx)\n", node, pcie_port,
CAST64(pemx_bist_status.u64));
pemx_bist_status2.u64 = CVMX_READ_CSR(CVMX_PEMX_BIST_STATUS2(pcie_port));
/*
* Errata PCIE-14766 may cause the lower 6 bits to be randomly set on
* CN63XXp1
*/
if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_X))
pemx_bist_status2.u64 &= ~0x3full;
if (pemx_bist_status2.u64) {
printf("%d:PCIe: BIST2 FAILED for port %d (0x%016llx)\n",
node, pcie_port, CAST64(pemx_bist_status2.u64));
}
/* Initialize the config space CSRs */
__cvmx_pcie_rc_initialize_config_space(node, pcie_port);
/* Enable gen2 speed selection */
pciercx_cfg515.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG515(pcie_port));
pciercx_cfg515.s.dsc = 1;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG515(pcie_port), pciercx_cfg515.u32);
/* Bring the link up */
if (__cvmx_pcie_rc_initialize_link_gen2(node, pcie_port)) {
/* Some gen1 devices don't handle the gen 2 training correctly.
* Disable gen2 and try again with only gen1
*/
cvmx_pciercx_cfg031_t pciercx_cfg031;
pciercx_cfg031.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG031(pcie_port));
pciercx_cfg031.s.mls = 1;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG031(pcie_port), pciercx_cfg031.u32);
if (__cvmx_pcie_rc_initialize_link_gen2(node, pcie_port)) {
printf("PCIe: Link timeout on port %d, probably the slot is empty\n",
pcie_port);
return -1;
}
}
__cvmx_pcie_sli_config(node, pcie_port);
/* Display the link status */
pciercx_cfg032.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG032(pcie_port));
printf("PCIe: Port %d link active, %d lanes, speed gen%d\n", pcie_port,
pciercx_cfg032.s.nlw, pciercx_cfg032.s.ls);
pcie_link_initialized[node][pcie_port] = true;
return 0;
}
/**
* @INTERNAL
* Initialize a host mode PCIe gen 2 link. This function takes a PCIe
* port from reset to a link up state. Software can then begin
* configuring the rest of the link.
*
* @param node node
* @param pcie_port PCIe port to initialize
*
* Return: Zero on success
*/
static int __cvmx_pcie_rc_initialize_link_gen2_v3(int node, int pcie_port)
{
u8 ltssm_history[LTSSM_HISTORY_SIZE];
int ltssm_history_loc;
cvmx_pemx_ctl_status_t pem_ctl_status;
cvmx_pciercx_cfg006_t pciercx_cfg006;
cvmx_pciercx_cfg031_t pciercx_cfg031;
cvmx_pciercx_cfg032_t pciercx_cfg032;
cvmx_pciercx_cfg068_t pciercx_cfg068;
cvmx_pciercx_cfg448_t pciercx_cfg448;
cvmx_pciercx_cfg515_t pciercx_cfg515;
int max_gen, max_width;
u64 hold_time;
u64 bounce_allow_time;
u64 timeout, good_time, current_time;
int neg_gen, neg_width, bus, dev_gen, dev_width;
unsigned int cap, cap_next;
int ltssm_state, desired_gen;
int desired_width;
int i, need_speed_change, need_lane_change;
int do_retry_speed = 0;
int link_up = 0, is_loop_done = 0;
if (CVMX_WAIT_FOR_FIELD64_NODE(node, CVMX_PEMX_ON(pcie_port), cvmx_pemx_on_t, pemoor, ==, 1,
100000)) {
printf("N%d:PCIe: Port %d PEM not on, skipping\n", node, pcie_port);
return -1;
}
/* Record starting LTSSM state for debug */
memset(ltssm_history, -1, sizeof(ltssm_history));
ltssm_history[0] = __cvmx_pcie_rc_get_ltssm_state(node, pcie_port);
ltssm_history_loc = 0;
pciercx_cfg031.u32 = CVMX_PCIE_CFGX_READ(pcie_port,
CVMX_PCIERCX_CFG031(pcie_port));
/* Max speed of PEM from config (1-3) */
max_gen = pciercx_cfg031.s.mls;
/* Max lane width of PEM (1-3) */
max_width = pciercx_cfg031.s.mlw;
#ifdef DEBUG_PCIE
printf("N%d.PCIe%d: Link supports up to %d lanes, speed gen%d\n",
node, pcie_port, max_width, max_gen);
#endif
/* Bring up the link */
#ifdef DEBUG_PCIE
printf("N%d.PCIe%d: Enabling the link\n", node, pcie_port);
#endif
pem_ctl_status.u64 = CVMX_READ_CSR(CVMX_PEMX_CTL_STATUS(pcie_port));
pem_ctl_status.s.lnk_enb = 1;
CVMX_WRITE_CSR(CVMX_PEMX_CTL_STATUS(pcie_port), pem_ctl_status.u64);
/*
* Configure SLI after enabling PCIe link. Is required for reading
* PCIe card capabilities.
*/
__cvmx_pcie_sli_config(node, pcie_port);
/*
* After the link is enabled no prints until link up or error,
* Otherwise will miss link state captures
*/
retry_speed:
/* Clear RC Correctable Error Status Register */
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG068(pcie_port), -1);
/* Wait for the link to come up and link training to be complete */
#ifdef DEBUG_PCIE
printf("N%d.PCIe%d: Waiting for link\n", node, pcie_port);
#endif
/* Timeout of 2 secs */
timeout = get_timer(0) + 2000;
/* Records when the link first went good */
good_time = 0;
do {
pciercx_cfg032.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG032(pcie_port));
/*
* Errata PEM-31375 PEM RSL access to PCLK registers can
* timeout during speed change. Check for temporary hardware
* timeout, and rety if happens
*/
if (pciercx_cfg032.u32 == 0xffffffff)
continue;
/* Record LTSSM state for debug */
ltssm_state = __cvmx_pcie_rc_get_ltssm_state(node, pcie_port);
if (ltssm_history[ltssm_history_loc] != ltssm_state) {
ltssm_history_loc = (ltssm_history_loc + 1) & (LTSSM_HISTORY_SIZE - 1);
ltssm_history[ltssm_history_loc] = ltssm_state;
}
/* Check if the link is up */
// current_time = cvmx_get_cycle();
current_time = get_timer(0);
link_up = (pciercx_cfg032.s.dlla && !pciercx_cfg032.s.lt);
if (link_up) {
/* Is this the first link up? */
if (!good_time) {
/* Mark the time when the link transitioned to good */
good_time = current_time;
} else {
/* Check for a link error */
pciercx_cfg068.u32 = CVMX_PCIE_CFGX_READ(
pcie_port, CVMX_PCIERCX_CFG068(pcie_port));
if (pciercx_cfg068.s.res) {
/*
* Ignore errors before we've been
* stable for bounce_allow_time
*/
if (good_time + bounce_allow_time <=
current_time) {
#ifdef DEBUG_PCIE
printf("N%d.PCIe%d: Link errors after link up\n",
node, pcie_port);
#endif
/* Link error, signal a retry */
return 1;
}
/*
* Clear RC Correctable Error
* Status Register
*/
CVMX_PCIE_CFGX_WRITE(pcie_port,
CVMX_PCIERCX_CFG068(pcie_port),
-1);
#ifdef DEBUG_PCIE
printf("N%d.PCIe%d: Ignored error during settling time\n",
node, pcie_port);
#endif
}
}
} else if (good_time) {
if (good_time + bounce_allow_time <= current_time) {
/*
* We allow bounces for bounce_allow_time after
* the link is good. Once this time passes any
* bounce requires a retry
*/
#ifdef DEBUG_PCIE
printf("N%d.PCIe%d: Link bounce detected\n",
node, pcie_port);
#endif
return 1; /* Link bounce, signal a retry */
}
#ifdef DEBUG_PCIE
printf("N%d.PCIe%d: Ignored bounce during settling time\n",
node, pcie_port);
#endif
}
/* Determine if we've hit the timeout */
is_loop_done = (current_time >= timeout);
/*
* Determine if we've had a good link for the required hold
* time
*/
is_loop_done |= link_up && (good_time + hold_time <=
current_time);
} while (!is_loop_done);
/* Trace the LTSSM state */
#ifdef DEBUG_PCIE
printf("N%d.PCIe%d: LTSSM History\n", node, pcie_port);
#endif
for (i = 0; i < LTSSM_HISTORY_SIZE; i++) {
ltssm_history_loc = (ltssm_history_loc + 1) & (LTSSM_HISTORY_SIZE - 1);
#ifdef DEBUG_PCIE
if (ltssm_history[ltssm_history_loc] != 0xff)
printf("N%d.PCIe%d: %s\n", node, pcie_port,
cvmx_pcie_get_ltssm_string(ltssm_history[ltssm_history_loc]));
#endif
}
if (!link_up) {
ltssm_state = __cvmx_pcie_rc_get_ltssm_state(node, pcie_port);
#ifdef DEBUG_PCIE
printf("N%d.PCIe%d: Link down, Data link layer %s(DLLA=%d), Link training %s(LT=%d), LTSSM %s\n",
node, pcie_port, pciercx_cfg032.s.dlla ? "active" : "down",
pciercx_cfg032.s.dlla, pciercx_cfg032.s.lt ? "active" : "complete",
pciercx_cfg032.s.lt, cvmx_pcie_get_ltssm_string(ltssm_state));
#endif
return 1; /* Link down, signal a retry */
}
/* Report the negotiated link speed and width */
neg_gen = pciercx_cfg032.s.ls; /* Current speed of PEM (1-3) */
neg_width = pciercx_cfg032.s.nlw; /* Current lane width of PEM (1-8) */
#ifdef DEBUG_PCIE
printf("N%d.PCIe%d: Link negotiated %d lanes, speed gen%d\n", node, pcie_port, neg_width,
neg_gen);
#endif
/* Determine PCIe bus number the directly attached device uses */
pciercx_cfg006.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG006(pcie_port));
bus = pciercx_cfg006.s.sbnum;
/* The SLI has to be initialized so we can read the downstream devices */
dev_gen = 1; /* Device max speed (1-3) */
dev_width = 1; /* Device max lane width (1-16) */
#ifdef DEBUG_PCIE
printf("N%d.PCIe%d: Reading Bus %d device max speed and width\n", node, pcie_port, bus);
#endif
/*
* Here is the second part of the config retry changes. Wait for 700ms
* after setting up the link before continuing. PCIe says the devices
* may need up to 900ms to come up. 700ms plus 200ms from above gives
* us a total of 900ms
*/
udelay(PCIE_DEVICE_READY_WAIT_DELAY_MICROSECONDS);
/* Read PCI capability pointer at offset 0x34 of target */
cap = cvmx_pcie_config_read32_retry(node, pcie_port, bus, 0, 0, 0x34);
/* Check if we were able to read capabilities pointer */
if (cap == 0xffffffff)
return 1; /* Signal retry needed */
/* Read device max speed and width */
cap_next = cap & 0xff;
while (cap_next) {
cap = cvmx_pcie_config_read32_retry(node, pcie_port, bus,
0, 0, cap_next);
if (cap == 0xffffffff)
return 1; /* Signal retry needed */
/* Is this a PCIe capability (0x10)? */
if ((cap & 0xff) == 0x10) {
#ifdef DEBUG_PCIE
printf("N%d.PCIe%d: Found PCIe capability at offset 0x%x\n",
node, pcie_port, cap_next);
#endif
/* Offset 0xc contains the max link info */
cap = cvmx_pcie_config_read32_retry(node, pcie_port, bus, 0, 0,
cap_next + 0xc);
if (cap == 0xffffffff)
return 1; /* Signal retry needed */
dev_gen = cap & 0xf; /* Max speed of PEM from config (1-3) */
dev_width = (cap >> 4) & 0x3f; /* Max lane width of PEM (1-16) */
#ifdef DEBUG_PCIE
printf("N%d.PCIe%d: Device supports %d lanes, speed gen%d\n", node,
pcie_port, dev_width, dev_gen);
#endif
break;
}
/* Move to next capability */
cap_next = (cap >> 8) & 0xff;
}
/*
* Desired link speed and width is either limited by the device or our
* PEM configuration. Choose the most restrictive limit
*/
desired_gen = (dev_gen < max_gen) ? dev_gen : max_gen;
desired_width = (dev_width < max_width) ? dev_width : max_width;
/*
* We need a change if we don't match the desired speed or width.
* Note that we allow better than expected in case the device lied
* about its capabilities
*/
need_speed_change = (neg_gen < desired_gen);
need_lane_change = (neg_width < desired_width);
if (need_lane_change) {
/* We didn't get the maximum number of lanes */
#ifdef DEBUG_PCIE
printf("N%d.PCIe%d: Link width (%d) less that supported (%d)\n",
node, pcie_port, neg_width, desired_width);
#endif
return 2; /* Link wrong width, signal a retry */
} else if (need_speed_change) {
if (do_retry_speed) {
#ifdef DEBUG_PCIE
printf("N%d.PCIe%d: Link speed (gen%d) less that supported (gen%d)\n", node,
pcie_port, neg_gen, desired_gen);
#endif
return 1; /* Link at width, but speed low. Request a retry */
}
/* We didn't get the maximum speed. Request a speed change */
#ifdef DEBUG_PCIE
printf("N%d.PCIe%d: Link speed (gen%d) less that supported (gen%d), requesting a speed change\n",
node, pcie_port, neg_gen, desired_gen);
#endif
pciercx_cfg515.u32 =
CVMX_PCIE_CFGX_READ(pcie_port,
CVMX_PCIERCX_CFG515(pcie_port));
pciercx_cfg515.s.dsc = 1;
CVMX_PCIE_CFGX_WRITE(pcie_port,
CVMX_PCIERCX_CFG515(pcie_port),
pciercx_cfg515.u32);
mdelay(100);
do_retry_speed = true;
goto retry_speed;
} else {
#ifdef DEBUG_PCIE
printf("N%d.PCIe%d: Link at best speed and width\n",
node, pcie_port);
#endif
/* For gen3 links check if we are getting errors over the link */
if (neg_gen == 3) {
/* Read RC Correctable Error Status Register */
pciercx_cfg068.u32 =
CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG068(pcie_port));
if (pciercx_cfg068.s.res) {
#ifdef DEBUG_PCIE
printf("N%d.PCIe%d: Link reporting error status\n", node,
pcie_port);
#endif
return 1; /* Getting receiver errors, request a retry */
}
}
return 0; /* Link at correct speed and width */
}
/* Update the Replay Time Limit. Empirically, some PCIe devices take a
* little longer to respond than expected under load. As a workaround
* for this we configure the Replay Time Limit to the value expected
* for a 512 byte MPS instead of our actual 256 byte MPS. The numbers
* below are directly from the PCIe spec table 3-4
*/
pciercx_cfg448.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG448(pcie_port));
switch (pciercx_cfg032.s.nlw) {
case 1: /* 1 lane */
pciercx_cfg448.s.rtl = 1677;
break;
case 2: /* 2 lanes */
pciercx_cfg448.s.rtl = 867;
break;
case 4: /* 4 lanes */
pciercx_cfg448.s.rtl = 462;
break;
case 8: /* 8 lanes */
pciercx_cfg448.s.rtl = 258;
break;
}
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG448(pcie_port), pciercx_cfg448.u32);
return 0;
}
static int __cvmx_pcie_rc_initialize_gen2_v3(int pcie_port)
{
cvmx_rst_ctlx_t rst_ctl;
cvmx_rst_soft_prstx_t rst_soft_prst;
cvmx_pciercx_cfg031_t pciercx_cfg031;
cvmx_pciercx_cfg032_t pciercx_cfg032;
cvmx_pciercx_cfg038_t pciercx_cfg038;
cvmx_pciercx_cfg040_t pciercx_cfg040;
cvmx_pciercx_cfg515_t pciercx_cfg515;
cvmx_pciercx_cfg548_t pciercx_cfg548;
cvmx_pemx_bist_status_t pemx_bist_status;
u64 rst_soft_prst_reg;
int qlm;
int node = (pcie_port >> 4) & 0x3;
bool requires_pem_reset = 0;
enum cvmx_qlm_mode mode = CVMX_QLM_MODE_DISABLED;
int retry_count = 0;
int result = 0;
pcie_port &= 0x3;
/* Assume link down until proven up */
pcie_link_initialized[node][pcie_port] = false;
/* Attempt link initialization up to 3 times */
while (retry_count <= MAX_RETRIES) {
#ifdef DEBUG_PCIE
if (retry_count)
printf("N%d:PCIE%d: Starting link retry %d\n", node, pcie_port,
retry_count);
#endif
if (pcie_port >= CVMX_PCIE_PORTS) {
#ifdef DEBUG_PCIE
printf("Invalid PCIe%d port\n", pcie_port);
#endif
return -1;
}
qlm = __cvmx_pcie_get_qlm(node, pcie_port);
if (qlm < 0)
return -1;
mode = cvmx_qlm_get_mode(qlm);
if (__cvmx_pcie_check_pcie_port(node, pcie_port, mode))
return -1;
rst_soft_prst_reg = CVMX_RST_SOFT_PRSTX(pcie_port);
rst_ctl.u64 = CVMX_READ_CSR(CVMX_RST_CTLX(pcie_port));
if (OCTEON_IS_MODEL(OCTEON_CN78XX)) {
CVMX_WRITE_CSR(CVMX_DTX_PEMX_SELX(0, pcie_port), 0x17);
CVMX_WRITE_CSR(CVMX_DTX_PEMX_SELX(1, pcie_port), 0);
}
if (!rst_ctl.s.host_mode) {
printf("N%d:PCIE: Port %d in endpoint mode.\n",
node, pcie_port);
return -1;
}
/* Bring the PCIe out of reset */
rst_soft_prst.u64 = CVMX_READ_CSR(rst_soft_prst_reg);
/*
* After a chip reset the PCIe will also be in reset. If it
* isn't, most likely someone is trying to init it again
* without a proper PCIe reset.
*/
if (rst_soft_prst.s.soft_prst == 0) {
/* Disable the MAC controller before resetting */
__cvmx_pcie_config_pemon(node, pcie_port, 0);
/* Reset the port */
rst_soft_prst.s.soft_prst = 1;
CVMX_WRITE_CSR(rst_soft_prst_reg, rst_soft_prst.u64);
/* Read to make sure write happens */
rst_soft_prst.u64 = CVMX_READ_CSR(rst_soft_prst_reg);
/* Keep PERST asserted for 2 ms */
udelay(2000);
/* Reset GSER_PHY to put in a clean state */
__cvmx_pcie_gser_phy_config(node, pcie_port, qlm);
requires_pem_reset = 1;
/* Enable MAC controller before taking pcie out of reset */
__cvmx_pcie_config_pemon(node, pcie_port, 1);
}
/* Deassert PERST */
rst_soft_prst.u64 = CVMX_READ_CSR(rst_soft_prst_reg);
rst_soft_prst.s.soft_prst = 0;
CVMX_WRITE_CSR(rst_soft_prst_reg, rst_soft_prst.u64);
rst_soft_prst.u64 = CVMX_READ_CSR(rst_soft_prst_reg);
/* Check if PLLs are locked after GSER_PHY reset. */
if (requires_pem_reset) {
cvmx_pemx_cfg_t pemx_cfg;
pemx_cfg.u64 = csr_rd(CVMX_PEMX_CFG(pcie_port));
if (CVMX_WAIT_FOR_FIELD64(CVMX_GSERX_QLM_STAT(qlm), cvmx_gserx_qlm_stat_t,
rst_rdy, ==, 1, 10000)) {
printf("QLM%d: Timeout waiting for GSERX_QLM_STAT[rst_rdy]\n", qlm);
return -1;
}
if (pemx_cfg.cn78xx.lanes8 &&
(CVMX_WAIT_FOR_FIELD64(CVMX_GSERX_QLM_STAT(qlm + 1),
cvmx_gserx_qlm_stat_t, rst_rdy, ==, 1, 10000))) {
printf("QLM%d: Timeout waiting for GSERX_QLM_STAT[rst_rdy]\n",
qlm + 1);
return -1;
}
}
/* Wait 1ms for PCIe reset to complete */
udelay(1000);
/*
* Check and make sure PCIe came out of reset. If it doesn't
* the board probably hasn't wired the clocks up and the
* interface should be skipped
*/
if (CVMX_WAIT_FOR_FIELD64_NODE(node, CVMX_RST_CTLX(pcie_port),
cvmx_rst_ctlx_t,
rst_done, ==, 1, 10000)) {
printf("N%d:PCIE: Port %d stuck in reset, skipping.\n", node, pcie_port);
return -1;
}
/* Check BIST status */
pemx_bist_status.u64 = CVMX_READ_CSR(CVMX_PEMX_BIST_STATUS(pcie_port));
if (pemx_bist_status.u64)
printf("N%d:PCIE: BIST FAILED for port %d (0x%016llx)\n", node, pcie_port,
CAST64(pemx_bist_status.u64));
/* Initialize the config space CSRs */
#ifdef DEBUG_PCIE
printf("N%d:PCIE%d Initialize Config Space\n", node, pcie_port);
#endif
__cvmx_pcie_rc_initialize_config_space(node, pcie_port);
/* Enable gen2 speed selection */
pciercx_cfg515.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG515(pcie_port));
pciercx_cfg515.s.dsc = 1;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG515(pcie_port), pciercx_cfg515.u32);
/* Do the link retries on the PCIe interface */
if (retry_count == MAX_RETRIES) {
/*
* This has to be done AFTER the QLM/PHY interface
* initialized
*/
pciercx_cfg031.u32 =
CVMX_PCIE_CFGX_READ(pcie_port,
CVMX_PCIERCX_CFG031(pcie_port));
/*
* Drop speed to gen2 if link bouncing
* Result = -1 PEM in reset
* Result = 0: link speed and width ok no retry needed
* Result = 1: link errors or speed change needed
* Result = 2: lane width error
*/
if (pciercx_cfg031.s.mls == 3 && result != 2) {
#ifdef DEBUG_PCIE
printf("N%d:PCIE%d: Dropping speed to gen2\n", node, pcie_port);
#endif
pciercx_cfg031.s.mls = 2;
CVMX_PCIE_CFGX_WRITE(pcie_port,
CVMX_PCIERCX_CFG031(pcie_port),
pciercx_cfg031.u32);
/* Set the target link speed */
pciercx_cfg040.u32 = CVMX_PCIE_CFGX_READ(
pcie_port, CVMX_PCIERCX_CFG040(pcie_port));
pciercx_cfg040.s.tls = 2;
CVMX_PCIE_CFGX_WRITE(pcie_port,
CVMX_PCIERCX_CFG040(pcie_port),
pciercx_cfg040.u32);
}
}
/* Bring the link up */
result = __cvmx_pcie_rc_initialize_link_gen2_v3(node, pcie_port);
if (result == 0) {
#ifdef DEBUG_PCIE
printf("N%d:PCIE%d: Link does not need a retry\n", node, pcie_port);
#endif
break;
} else if (result > 0) {
if (retry_count >= MAX_RETRIES) {
int link_up;
#ifdef DEBUG_PCIE
printf("N%d:PCIE%d: Link requested a retry, but hit the max retries\n",
node, pcie_port);
#endif
/* If the link is down, report failure */
pciercx_cfg032.u32 = CVMX_PCIE_CFGX_READ(
pcie_port,
CVMX_PCIERCX_CFG032(pcie_port));
link_up = (pciercx_cfg032.s.dlla && !pciercx_cfg032.s.lt);
if (!link_up)
result = -1;
}
#ifdef DEBUG_PCIE
else
printf("N%d.PCIE%d: Link requested a retry\n", node, pcie_port);
#endif
}
if (result < 0) {
int ltssm_state = __cvmx_pcie_rc_get_ltssm_state(node, pcie_port);
printf("N%d:PCIE%d: Link timeout, probably the slot is empty (LTSSM %s)\n",
node, pcie_port, cvmx_pcie_get_ltssm_string(ltssm_state));
return -1;
}
retry_count++;
}
pciercx_cfg032.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG032(pcie_port));
/*
* Errata PEM-28816: Link retrain initiated at GEN1 can cause PCIE
* link to hang. For Gen1 links we must disable equalization
*/
if (pciercx_cfg032.s.ls == 1) {
#ifdef DEBUG_PCIE
printf("N%d:PCIE%d: Disabling equalization for GEN1 Link\n", node, pcie_port);
#endif
pciercx_cfg548.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG548(pcie_port));
pciercx_cfg548.s.ed = 1;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG548(pcie_port), pciercx_cfg548.u32);
}
/* Errata PCIE-29440: Atomic operations to work properly */
pciercx_cfg038.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG038(pcie_port));
pciercx_cfg038.s.atom_op_eb = 0;
pciercx_cfg038.s.atom_op = 1;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG038(pcie_port), pciercx_cfg038.u32);
/* Errata PCIE-29566 PEM Link Hangs after going into L1 */
pciercx_cfg548.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG548(pcie_port));
pciercx_cfg548.s.grizdnc = 0;
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIERCX_CFG548(pcie_port), pciercx_cfg548.u32);
if (result < 0)
return result;
/* Display the link status */
pciercx_cfg032.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIERCX_CFG032(pcie_port));
printf("N%d:PCIe: Port %d link active, %d lanes, speed gen%d\n", node, pcie_port,
pciercx_cfg032.s.nlw, pciercx_cfg032.s.ls);
pcie_link_initialized[node][pcie_port] = true;
return 0;
}
/**
* Initialize a PCIe port for use in host(RC) mode. It doesn't enumerate the bus.
*
* @param pcie_port PCIe port to initialize for a node
*
* Return: Zero on success
*/
int cvmx_pcie_rc_initialize(int pcie_port)
{
int result;
if (OCTEON_IS_OCTEON2() || OCTEON_IS_MODEL(OCTEON_CN70XX))
result = __cvmx_pcie_rc_initialize_gen2(pcie_port);
else
result = __cvmx_pcie_rc_initialize_gen2_v3(pcie_port);
if (result == 0)
cvmx_error_enable_group(CVMX_ERROR_GROUP_PCI, pcie_port);
return result;
}
/**
* Shutdown a PCIe port and put it in reset
*
* @param pcie_port PCIe port to shutdown for a node
*
* Return: Zero on success
*/
int cvmx_pcie_rc_shutdown(int pcie_port)
{
u64 ciu_soft_prst_reg;
cvmx_ciu_soft_prst_t ciu_soft_prst;
int node;
/* Shutdown only if PEM is in RC mode */
if (!cvmx_pcie_is_host_mode(pcie_port))
return -1;
node = (pcie_port >> 4) & 0x3;
pcie_port &= 0x3;
cvmx_error_disable_group(CVMX_ERROR_GROUP_PCI, pcie_port);
/* Wait for all pending operations to complete */
if (CVMX_WAIT_FOR_FIELD64_NODE(node, CVMX_PEMX_CPL_LUT_VALID(pcie_port),
cvmx_pemx_cpl_lut_valid_t, tag, ==,
0, 2000))
debug("PCIe: Port %d shutdown timeout\n", pcie_port);
if (OCTEON_IS_OCTEON3()) {
ciu_soft_prst_reg = CVMX_RST_SOFT_PRSTX(pcie_port);
} else {
ciu_soft_prst_reg = (pcie_port) ? CVMX_CIU_SOFT_PRST1 :
CVMX_CIU_SOFT_PRST;
}
/* Force reset */
ciu_soft_prst.u64 = CVMX_READ_CSR(ciu_soft_prst_reg);
ciu_soft_prst.s.soft_prst = 1;
CVMX_WRITE_CSR(ciu_soft_prst_reg, ciu_soft_prst.u64);
return 0;
}
/**
* @INTERNAL
* Build a PCIe config space request address for a device
*
* @param node node
* @param port PCIe port (relative to the node) to access
* @param bus Sub bus
* @param dev Device ID
* @param fn Device sub function
* @param reg Register to access
*
* Return: 64bit Octeon IO address
*/
static uint64_t __cvmx_pcie_build_config_addr(int node, int port, int bus, int dev, int fn, int reg)
{
cvmx_pcie_address_t pcie_addr;
cvmx_pciercx_cfg006_t pciercx_cfg006;
pciercx_cfg006.u32 = cvmx_pcie_cfgx_read_node(node, port,
CVMX_PCIERCX_CFG006(port));
if (bus <= pciercx_cfg006.s.pbnum && dev != 0)
return 0;
pcie_addr.u64 = 0;
pcie_addr.config.upper = 2;
pcie_addr.config.io = 1;
pcie_addr.config.did = 3;
pcie_addr.config.subdid = 1;
pcie_addr.config.node = node;
pcie_addr.config.es = _CVMX_PCIE_ES;
pcie_addr.config.port = port;
/* Always use config type 0 */
if (pciercx_cfg006.s.pbnum == 0)
pcie_addr.config.ty = (bus > pciercx_cfg006.s.pbnum + 1);
else
pcie_addr.config.ty = (bus > pciercx_cfg006.s.pbnum);
pcie_addr.config.bus = bus;
pcie_addr.config.dev = dev;
pcie_addr.config.func = fn;
pcie_addr.config.reg = reg;
return pcie_addr.u64;
}
/**
* Read 8bits from a Device's config space
*
* @param pcie_port PCIe port the device is on
* @param bus Sub bus
* @param dev Device ID
* @param fn Device sub function
* @param reg Register to access
*
* Return: Result of the read
*/
uint8_t cvmx_pcie_config_read8(int pcie_port, int bus, int dev, int fn, int reg)
{
u64 address;
int node = (pcie_port >> 4) & 0x3;
pcie_port &= 0x3;
address = __cvmx_pcie_build_config_addr(node, pcie_port, bus, dev, fn, reg);
if (address)
return cvmx_read64_uint8(address);
else
return 0xff;
}
/**
* Read 16bits from a Device's config space
*
* @param pcie_port PCIe port the device is on
* @param bus Sub bus
* @param dev Device ID
* @param fn Device sub function
* @param reg Register to access
*
* Return: Result of the read
*/
uint16_t cvmx_pcie_config_read16(int pcie_port, int bus, int dev, int fn, int reg)
{
u64 address;
int node = (pcie_port >> 4) & 0x3;
pcie_port &= 0x3;
address = __cvmx_pcie_build_config_addr(node, pcie_port, bus, dev, fn, reg);
if (address)
return le16_to_cpu(cvmx_read64_uint16(address));
else
return 0xffff;
}
static uint32_t __cvmx_pcie_config_read32(int node, int pcie_port, int bus, int dev, int func,
int reg, int lst)
{
u64 address;
address = __cvmx_pcie_build_config_addr(node, pcie_port, bus, dev, func, reg);
if (lst) {
if (address && pcie_link_initialized[node][pcie_port])
return le32_to_cpu(cvmx_read64_uint32(address));
else
return 0xffffffff;
} else if (address) {
return le32_to_cpu(cvmx_read64_uint32(address));
} else {
return 0xffffffff;
}
}
/**
* Read 32bits from a Device's config space
*
* @param pcie_port PCIe port the device is on
* @param bus Sub bus
* @param dev Device ID
* @param fn Device sub function
* @param reg Register to access
*
* Return: Result of the read
*/
uint32_t cvmx_pcie_config_read32(int pcie_port, int bus, int dev, int fn, int reg)
{
int node = (pcie_port >> 4) & 0x3;
pcie_port &= 0x3;
return __cvmx_pcie_config_read32(node, pcie_port, bus, dev, fn, reg,
pcie_link_initialized[node][pcie_port]);
}
/**
* Write 8bits to a Device's config space
*
* @param pcie_port PCIe port the device is on
* @param bus Sub bus
* @param dev Device ID
* @param fn Device sub function
* @param reg Register to access
* @param val Value to write
*/
void cvmx_pcie_config_write8(int pcie_port, int bus, int dev, int fn, int reg, uint8_t val)
{
u64 address;
int node = (pcie_port >> 4) & 0x3;
pcie_port &= 0x3;
address = __cvmx_pcie_build_config_addr(node, pcie_port, bus, dev, fn, reg);
if (address)
cvmx_write64_uint8(address, val);
}
/**
* Write 16bits to a Device's config space
*
* @param pcie_port PCIe port the device is on
* @param bus Sub bus
* @param dev Device ID
* @param fn Device sub function
* @param reg Register to access
* @param val Value to write
*/
void cvmx_pcie_config_write16(int pcie_port, int bus, int dev, int fn, int reg, uint16_t val)
{
u64 address;
int node = (pcie_port >> 4) & 0x3;
pcie_port &= 0x3;
address = __cvmx_pcie_build_config_addr(node, pcie_port, bus, dev, fn, reg);
if (address)
cvmx_write64_uint16(address, cpu_to_le16(val));
}
/**
* Write 32bits to a Device's config space
*
* @param pcie_port PCIe port the device is on
* @param bus Sub bus
* @param dev Device ID
* @param fn Device sub function
* @param reg Register to access
* @param val Value to write
*/
void cvmx_pcie_config_write32(int pcie_port, int bus, int dev, int fn, int reg, uint32_t val)
{
u64 address;
int node = (pcie_port >> 4) & 0x3;
pcie_port &= 0x3;
address = __cvmx_pcie_build_config_addr(node, pcie_port, bus, dev, fn, reg);
if (address)
cvmx_write64_uint32(address, cpu_to_le32(val));
}
/**
* Read a PCIe config space register indirectly. This is used for
* registers of the form PCIEEP_CFG??? and PCIERC?_CFG???.
*
* @param pcie_port PCIe port to read from
* @param cfg_offset Address to read
*
* Return: Value read
*/
uint32_t cvmx_pcie_cfgx_read(int pcie_port, uint32_t cfg_offset)
{
return cvmx_pcie_cfgx_read_node(0, pcie_port, cfg_offset);
}
uint32_t cvmx_pcie_cfgx_read_node(int node, int pcie_port, uint32_t cfg_offset)
{
cvmx_pemx_cfg_rd_t pemx_cfg_rd;
pemx_cfg_rd.u64 = 0;
pemx_cfg_rd.s.addr = cfg_offset;
CVMX_WRITE_CSR(CVMX_PEMX_CFG_RD(pcie_port), pemx_cfg_rd.u64);
pemx_cfg_rd.u64 = CVMX_READ_CSR(CVMX_PEMX_CFG_RD(pcie_port));
return pemx_cfg_rd.s.data;
}
/**
* Write a PCIe config space register indirectly. This is used for
* registers of the form PCIEEP_CFG??? and PCIERC?_CFG???.
*
* @param pcie_port PCIe port to write to
* @param cfg_offset Address to write
* @param val Value to write
*/
void cvmx_pcie_cfgx_write(int pcie_port, uint32_t cfg_offset, uint32_t val)
{
cvmx_pcie_cfgx_write_node(0, pcie_port, cfg_offset, val);
}
void cvmx_pcie_cfgx_write_node(int node, int pcie_port, uint32_t cfg_offset, uint32_t val)
{
cvmx_pemx_cfg_wr_t pemx_cfg_wr;
pemx_cfg_wr.u64 = 0;
pemx_cfg_wr.s.addr = cfg_offset;
pemx_cfg_wr.s.data = val;
CVMX_WRITE_CSR(CVMX_PEMX_CFG_WR(pcie_port), pemx_cfg_wr.u64);
}
extern int cvmx_pcie_is_host_mode(int pcie_port);
/**
* Initialize a PCIe port for use in target(EP) mode.
*
* @param pcie_port PCIe port to initialize for a node
*
* Return: Zero on success
*/
int cvmx_pcie_ep_initialize(int pcie_port)
{
int node = (pcie_port >> 4) & 0x3;
if (cvmx_pcie_is_host_mode(pcie_port))
return -1;
pcie_port &= 0x3;
/* CN63XX Pass 1.0 errata G-14395 requires the QLM De-emphasis be
* programmed
*/
if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_0)) {
if (pcie_port) {
cvmx_ciu_qlm1_t ciu_qlm;
ciu_qlm.u64 = csr_rd(CVMX_CIU_QLM1);
ciu_qlm.s.txbypass = 1;
ciu_qlm.s.txdeemph = 5;
ciu_qlm.s.txmargin = 0x17;
csr_wr(CVMX_CIU_QLM1, ciu_qlm.u64);
} else {
cvmx_ciu_qlm0_t ciu_qlm;
ciu_qlm.u64 = csr_rd(CVMX_CIU_QLM0);
ciu_qlm.s.txbypass = 1;
ciu_qlm.s.txdeemph = 5;
ciu_qlm.s.txmargin = 0x17;
csr_wr(CVMX_CIU_QLM0, ciu_qlm.u64);
}
}
/* Enable bus master and memory */
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIEEPX_CFG001(pcie_port), 0x6);
/* Max Payload Size (PCIE*_CFG030[MPS]) */
/* Max Read Request Size (PCIE*_CFG030[MRRS]) */
/* Relaxed-order, no-snoop enables (PCIE*_CFG030[RO_EN,NS_EN] */
/* Error Message Enables (PCIE*_CFG030[CE_EN,NFE_EN,FE_EN,UR_EN]) */
{
cvmx_pcieepx_cfg030_t pcieepx_cfg030;
pcieepx_cfg030.u32 = CVMX_PCIE_CFGX_READ(pcie_port, CVMX_PCIEEPX_CFG030(pcie_port));
pcieepx_cfg030.s.mps = MPS_CN6XXX;
pcieepx_cfg030.s.mrrs = MRRS_CN6XXX;
pcieepx_cfg030.s.ro_en = 1; /* Enable relaxed ordering. */
pcieepx_cfg030.s.ns_en = 1; /* Enable no snoop. */
pcieepx_cfg030.s.ce_en = 1; /* Correctable error reporting enable. */
pcieepx_cfg030.s.nfe_en = 1; /* Non-fatal error reporting enable. */
pcieepx_cfg030.s.fe_en = 1; /* Fatal error reporting enable. */
pcieepx_cfg030.s.ur_en = 1; /* Unsupported request reporting enable. */
CVMX_PCIE_CFGX_WRITE(pcie_port, CVMX_PCIEEPX_CFG030(pcie_port), pcieepx_cfg030.u32);
}
/* Max Payload Size (DPI_SLI_PRTX_CFG[MPS]) must match
* PCIE*_CFG030[MPS]
*/
/* Max Read Request Size (DPI_SLI_PRTX_CFG[MRRS]) must not
* exceed PCIE*_CFG030[MRRS]
*/
cvmx_dpi_sli_prtx_cfg_t prt_cfg;
cvmx_sli_s2m_portx_ctl_t sli_s2m_portx_ctl;
prt_cfg.u64 = CVMX_READ_CSR(CVMX_DPI_SLI_PRTX_CFG(pcie_port));
prt_cfg.s.mps = MPS_CN6XXX;
prt_cfg.s.mrrs = MRRS_CN6XXX;
/* Max outstanding load request. */
prt_cfg.s.molr = 32;
CVMX_WRITE_CSR(CVMX_DPI_SLI_PRTX_CFG(pcie_port), prt_cfg.u64);
sli_s2m_portx_ctl.u64 = CVMX_READ_CSR(CVMX_PEXP_SLI_S2M_PORTX_CTL(pcie_port));
if (!(OCTEON_IS_MODEL(OCTEON_CN78XX) || OCTEON_IS_MODEL(OCTEON_CN73XX) ||
OCTEON_IS_MODEL(OCTEON_CNF75XX)))
sli_s2m_portx_ctl.cn61xx.mrrs = MRRS_CN6XXX;
CVMX_WRITE_CSR(CVMX_PEXP_SLI_S2M_PORTX_CTL(pcie_port), sli_s2m_portx_ctl.u64);
/* Setup Mem access SubDID 12 to access Host memory */
cvmx_sli_mem_access_subidx_t mem_access_subid;
mem_access_subid.u64 = 0;
mem_access_subid.s.port = pcie_port; /* Port the request is sent to. */
mem_access_subid.s.nmerge = 0; /* Merging is allowed in this window. */
mem_access_subid.s.esr = 0; /* Endian-swap for Reads. */
mem_access_subid.s.esw = 0; /* Endian-swap for Writes. */
mem_access_subid.s.wtype = 0; /* "No snoop" and "Relaxed ordering" are not set */
mem_access_subid.s.rtype = 0; /* "No snoop" and "Relaxed ordering" are not set */
/* PCIe Address Bits <63:34>. */
if (OCTEON_IS_MODEL(OCTEON_CN68XX))
mem_access_subid.cn68xx.ba = 0;
else
mem_access_subid.cn63xx.ba = 0;
CVMX_WRITE_CSR(CVMX_PEXP_SLI_MEM_ACCESS_SUBIDX(12 + pcie_port * 4), mem_access_subid.u64);
return 0;
}
/**
* Wait for posted PCIe read/writes to reach the other side of
* the internal PCIe switch. This will insure that core
* read/writes are posted before anything after this function
* is called. This may be necessary when writing to memory that
* will later be read using the DMA/PKT engines.
*
* @param pcie_port PCIe port to wait for
*/
void cvmx_pcie_wait_for_pending(int pcie_port)
{
cvmx_sli_data_out_cnt_t sli_data_out_cnt;
int a;
int b;
int c;
sli_data_out_cnt.u64 = csr_rd(CVMX_PEXP_SLI_DATA_OUT_CNT);
if (pcie_port) {
if (!sli_data_out_cnt.s.p1_fcnt)
return;
a = sli_data_out_cnt.s.p1_ucnt;
b = (a + sli_data_out_cnt.s.p1_fcnt - 1) & 0xffff;
} else {
if (!sli_data_out_cnt.s.p0_fcnt)
return;
a = sli_data_out_cnt.s.p0_ucnt;
b = (a + sli_data_out_cnt.s.p0_fcnt - 1) & 0xffff;
}
while (1) {
sli_data_out_cnt.u64 = csr_rd(CVMX_PEXP_SLI_DATA_OUT_CNT);
c = (pcie_port) ? sli_data_out_cnt.s.p1_ucnt :
sli_data_out_cnt.s.p0_ucnt;
if (a <= b) {
if (c < a || c > b)
return;
} else {
if (c > b && c < a)
return;
}
}
}
/**
* Returns if a PCIe port is in host or target mode.
*
* @param pcie_port PCIe port number (PEM number)
*
* Return: 0 if PCIe port is in target mode, !0 if in host mode.
*/
int cvmx_pcie_is_host_mode(int pcie_port)
{
int node = (pcie_port >> 4) & 0x3;
cvmx_mio_rst_ctlx_t mio_rst_ctl;
pcie_port &= 0x3;
if (OCTEON_IS_MODEL(OCTEON_CN78XX) || OCTEON_IS_MODEL(OCTEON_CN73XX)) {
cvmx_pemx_strap_t strap;
strap.u64 = CVMX_READ_CSR(CVMX_PEMX_STRAP(pcie_port));
return (strap.cn78xx.pimode == 3);
} else if (OCTEON_IS_MODEL(OCTEON_CN70XX)) {
cvmx_rst_ctlx_t rst_ctl;
rst_ctl.u64 = csr_rd(CVMX_RST_CTLX(pcie_port));
return !!rst_ctl.s.host_mode;
}
mio_rst_ctl.u64 = csr_rd(CVMX_MIO_RST_CTLX(pcie_port));
if (OCTEON_IS_MODEL(OCTEON_CN61XX) || OCTEON_IS_MODEL(OCTEON_CNF71XX))
return mio_rst_ctl.s.prtmode != 0;
else
return !!mio_rst_ctl.s.host_mode;
}
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