From: David Daney <david.daney@xxxxxxxxxx>
OCTEON II SOCs have a different PCIe implementation than is present in
OCTEON Plus.
Signed-off-by: David Daney <david.daney@xxxxxxxxxx>
---
arch/mips/pci/pcie-octeon.c | 1349 ++++++++++++++++++++++++++++++++-----------
1 files changed, 1023 insertions(+), 326 deletions(-)
diff --git a/arch/mips/pci/pcie-octeon.c b/arch/mips/pci/pcie-octeon.c
index 0583c46..fdb4d55 100644
--- a/arch/mips/pci/pcie-octeon.c
+++ b/arch/mips/pci/pcie-octeon.c
@@ -3,7 +3,7 @@
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 2007, 2008 Cavium Networks
+ * Copyright (C) 2007, 2008, 2009, 2010, 2011 Cavium Networks
*/
#include <linux/kernel.h>
#include <linux/init.h>
@@ -11,15 +11,32 @@
#include <linux/interrupt.h>
#include <linux/time.h>
#include <linux/delay.h>
+#include <linux/module.h>
#include <asm/octeon/octeon.h>
#include <asm/octeon/cvmx-npei-defs.h>
#include <asm/octeon/cvmx-pciercx-defs.h>
#include <asm/octeon/cvmx-pescx-defs.h>
#include <asm/octeon/cvmx-pexp-defs.h>
+#include <asm/octeon/cvmx-pemx-defs.h>
+#include <asm/octeon/cvmx-dpi-defs.h>
+#include <asm/octeon/cvmx-sli-defs.h>
+#include <asm/octeon/cvmx-sriox-defs.h>
#include <asm/octeon/cvmx-helper-errata.h>
#include <asm/octeon/pci-octeon.h>
+#define MRRS_CN5XXX 0 /* 128 byte Max Read Request Size */
+#define MPS_CN5XXX 0 /* 128 byte Max Packet Size (Limit of most PCs) */
+#define MRRS_CN6XXX 3 /* 1024 byte Max Read Request Size */
+#define MPS_CN6XXX 0 /* 128 byte Max Packet Size (Limit of most PCs) */
+
+/* Module parameter to disable PCI probing */
+static int pcie_disable;
+module_param(pcie_disable, int, S_IRUGO);
+
+static int enable_pcie_14459_war;
+static int enable_pcie_bus_num_war[2];
+
union cvmx_pcie_address {
uint64_t u64;
struct {
@@ -75,6 +92,8 @@ union cvmx_pcie_address {
} mem;
};
+static int cvmx_pcie_rc_initialize(int pcie_port);
+
#include <dma-coherence.h>
/**
@@ -154,12 +173,21 @@ static inline uint64_t cvmx_pcie_get_mem_size(int pcie_port)
*/
static uint32_t cvmx_pcie_cfgx_read(int pcie_port, uint32_t cfg_offset)
{
- union cvmx_pescx_cfg_rd pescx_cfg_rd;
- pescx_cfg_rd.u64 = 0;
- pescx_cfg_rd.s.addr = cfg_offset;
- cvmx_write_csr(CVMX_PESCX_CFG_RD(pcie_port), pescx_cfg_rd.u64);
- pescx_cfg_rd.u64 = cvmx_read_csr(CVMX_PESCX_CFG_RD(pcie_port));
- return pescx_cfg_rd.s.data;
+ if (octeon_has_feature(OCTEON_FEATURE_NPEI)) {
+ union cvmx_pescx_cfg_rd pescx_cfg_rd;
+ pescx_cfg_rd.u64 = 0;
+ pescx_cfg_rd.s.addr = cfg_offset;
+ cvmx_write_csr(CVMX_PESCX_CFG_RD(pcie_port), pescx_cfg_rd.u64);
+ pescx_cfg_rd.u64 = cvmx_read_csr(CVMX_PESCX_CFG_RD(pcie_port));
+ return pescx_cfg_rd.s.data;
+ } else {
+ union cvmx_pemx_cfg_rd 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;
+ }
}
/**
@@ -173,11 +201,19 @@ static uint32_t cvmx_pcie_cfgx_read(int pcie_port, uint32_t cfg_offset)
static void cvmx_pcie_cfgx_write(int pcie_port, uint32_t cfg_offset,
uint32_t val)
{
- union cvmx_pescx_cfg_wr pescx_cfg_wr;
- pescx_cfg_wr.u64 = 0;
- pescx_cfg_wr.s.addr = cfg_offset;
- pescx_cfg_wr.s.data = val;
- cvmx_write_csr(CVMX_PESCX_CFG_WR(pcie_port), pescx_cfg_wr.u64);
+ if (octeon_has_feature(OCTEON_FEATURE_NPEI)) {
+ union cvmx_pescx_cfg_wr pescx_cfg_wr;
+ pescx_cfg_wr.u64 = 0;
+ pescx_cfg_wr.s.addr = cfg_offset;
+ pescx_cfg_wr.s.data = val;
+ cvmx_write_csr(CVMX_PESCX_CFG_WR(pcie_port), pescx_cfg_wr.u64);
+ } else {
+ union cvmx_pemx_cfg_wr 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);
+ }
}
/**
@@ -348,7 +384,6 @@ static void cvmx_pcie_config_write32(int pcie_port, int bus, int dev, int fn,
static void __cvmx_pcie_rc_initialize_config_space(int pcie_port)
{
union cvmx_pciercx_cfg030 pciercx_cfg030;
- union cvmx_npei_ctl_status2 npei_ctl_status2;
union cvmx_pciercx_cfg070 pciercx_cfg070;
union cvmx_pciercx_cfg001 pciercx_cfg001;
union cvmx_pciercx_cfg032 pciercx_cfg032;
@@ -365,21 +400,21 @@ static void __cvmx_pcie_rc_initialize_config_space(int pcie_port)
/* 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]) */
- pciercx_cfg030.u32 =
- cvmx_pcie_cfgx_read(pcie_port, CVMX_PCIERCX_CFG030(pcie_port));
- /*
- * Max payload size = 128 bytes for best Octeon DMA
- * performance.
- */
- pciercx_cfg030.s.mps = 0;
+
+ pciercx_cfg030.u32 = cvmx_pcie_cfgx_read(pcie_port, CVMX_PCIERCX_CFG030(pcie_port));
+ if (OCTEON_IS_MODEL(OCTEON_CN5XXX)) {
+ pciercx_cfg030.s.mps = MPS_CN5XXX;
+ pciercx_cfg030.s.mrrs = MRRS_CN5XXX;
+ } else {
+ pciercx_cfg030.s.mps = MPS_CN6XXX;
+ pciercx_cfg030.s.mrrs = MRRS_CN6XXX;
+ }
/*
- * Max read request size = 128 bytes for best Octeon DMA
- * performance.
+ * Enable relaxed order processing. This will allow devices to
+ * affect read response ordering.
*/
- pciercx_cfg030.s.mrrs = 0;
- /* Enable relaxed ordering. */
pciercx_cfg030.s.ro_en = 1;
- /* Enable no snoop. */
+ /* Enable no snoop processing. Not used by Octeon */
pciercx_cfg030.s.ns_en = 1;
/* Correctable error reporting enable. */
pciercx_cfg030.s.ce_en = 1;
@@ -389,50 +424,67 @@ static void __cvmx_pcie_rc_initialize_config_space(int pcie_port)
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);
+ cvmx_pcie_cfgx_write(pcie_port, CVMX_PCIERCX_CFG030(pcie_port), pciercx_cfg030.u32);
- /*
- * Max Payload Size (NPEI_CTL_STATUS2[MPS]) must match
- * PCIE*_CFG030[MPS]
- *
- * Max Read Request Size (NPEI_CTL_STATUS2[MRRS]) must not
- * exceed PCIE*_CFG030[MRRS].
- */
- npei_ctl_status2.u64 = cvmx_read_csr(CVMX_PEXP_NPEI_CTL_STATUS2);
- /* Max payload size = 128 bytes for best Octeon DMA performance */
- npei_ctl_status2.s.mps = 0;
- /* Max read request size = 128 bytes for best Octeon DMA performance */
- npei_ctl_status2.s.mrrs = 0;
- if (pcie_port)
- npei_ctl_status2.s.c1_b1_s = 3; /* Port1 BAR1 Size 256MB */
- else
- npei_ctl_status2.s.c0_b1_s = 3; /* Port0 BAR1 Size 256MB */
- cvmx_write_csr(CVMX_PEXP_NPEI_CTL_STATUS2, npei_ctl_status2.u64);
+
+ if (octeon_has_feature(OCTEON_FEATURE_NPEI)) {
+ union cvmx_npei_ctl_status2 npei_ctl_status2;
+ /*
+ * Max Payload Size (NPEI_CTL_STATUS2[MPS]) must match
+ * PCIE*_CFG030[MPS]. Max Read Request Size
+ * (NPEI_CTL_STATUS2[MRRS]) must not exceed
+ * PCIE*_CFG030[MRRS]
+ */
+ npei_ctl_status2.u64 = cvmx_read_csr(CVMX_PEXP_NPEI_CTL_STATUS2);
+ /* Max payload size = 128 bytes for best Octeon DMA performance */
+ npei_ctl_status2.s.mps = MPS_CN5XXX;
+ /* Max read request size = 128 bytes for best Octeon DMA performance */
+ npei_ctl_status2.s.mrrs = MRRS_CN5XXX;
+ if (pcie_port)
+ npei_ctl_status2.s.c1_b1_s = 3; /* Port1 BAR1 Size 256MB */
+ else
+ npei_ctl_status2.s.c0_b1_s = 3; /* Port0 BAR1 Size 256MB */
+
+ cvmx_write_csr(CVMX_PEXP_NPEI_CTL_STATUS2, npei_ctl_status2.u64);
+ } else {
+ /*
+ * 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].
+ */
+ union cvmx_dpi_sli_prtx_cfg prt_cfg;
+ union cvmx_sli_s2m_portx_ctl 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));
+ sli_s2m_portx_ctl.s.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]) */
- pciercx_cfg070.u32 =
- cvmx_pcie_cfgx_read(pcie_port, CVMX_PCIERCX_CFG070(pcie_port));
+ 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);
+ 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])
+ * 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])
*/
- pciercx_cfg001.u32 =
- cvmx_pcie_cfgx_read(pcie_port, CVMX_PCIERCX_CFG001(pcie_port));
+ 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);
+ 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) */
@@ -440,14 +492,11 @@ static void __cvmx_pcie_rc_initialize_config_space(int pcie_port)
/* 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]) */
- 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);
- /* Entrance Latencies (PCIE*_CFG451[L0EL,L1EL]) */
+ /* Active State Power Management (PCIE*_CFG032[ASLPC]) */
+ 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
@@ -462,8 +511,8 @@ static void __cvmx_pcie_rc_initialize_config_space(int pcie_port)
pciercx_cfg006.s.pbnum = 1;
pciercx_cfg006.s.sbnum = 1;
pciercx_cfg006.s.subbnum = 1;
- cvmx_pcie_cfgx_write(pcie_port, CVMX_PCIERCX_CFG006(pcie_port),
- pciercx_cfg006.u32);
+ cvmx_pcie_cfgx_write(pcie_port, CVMX_PCIERCX_CFG006(pcie_port), pciercx_cfg006.u32);
+
/*
* Memory-mapped I/O BAR (PCIERCn_CFG008)
@@ -473,8 +522,8 @@ static void __cvmx_pcie_rc_initialize_config_space(int pcie_port)
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);
+ cvmx_pcie_cfgx_write(pcie_port, CVMX_PCIERCX_CFG008(pcie_port), pciercx_cfg008.u32);
+
/*
* Prefetchable BAR (PCIERCn_CFG009,PCIERCn_CFG010,PCIERCn_CFG011)
@@ -482,72 +531,51 @@ static void __cvmx_pcie_rc_initialize_config_space(int pcie_port)
* PCIERCn_CFG011[UMEM_LIMIT],PCIERCn_CFG009[LMEM_LIMIT] <
* PCIERCn_CFG010[UMEM_BASE],PCIERCn_CFG009[LMEM_BASE]
*/
- 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.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);
+ 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])
- */
- pciercx_cfg035.u32 =
- cvmx_pcie_cfgx_read(pcie_port, CVMX_PCIERCX_CFG035(pcie_port));
- /* System error on correctable error enable. */
- pciercx_cfg035.s.secee = 1;
- /* System error on fatal error enable. */
- pciercx_cfg035.s.sefee = 1;
- /* System error on non-fatal error enable. */
- pciercx_cfg035.s.senfee = 1;
- /* PME interrupt enable. */
- pciercx_cfg035.s.pmeie = 1;
- cvmx_pcie_cfgx_write(pcie_port, CVMX_PCIERCX_CFG035(pcie_port),
- pciercx_cfg035.u32);
+ */
+ 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])
*/
- pciercx_cfg075.u32 =
- cvmx_pcie_cfgx_read(pcie_port, CVMX_PCIERCX_CFG075(pcie_port));
- /* Correctable error reporting enable. */
- pciercx_cfg075.s.cere = 1;
- /* Non-fatal error reporting enable. */
- pciercx_cfg075.s.nfere = 1;
- /* Fatal error reporting enable. */
- pciercx_cfg075.s.fere = 1;
- cvmx_pcie_cfgx_write(pcie_port, CVMX_PCIERCX_CFG075(pcie_port),
- pciercx_cfg075.u32);
+ 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],
+ /*
+ * HP Interrupt Enables (PCIERCn_CFG034[HPINT_EN],
* PCIERCn_CFG034[DLLS_EN,CCINT_EN])
*/
- pciercx_cfg034.u32 =
- cvmx_pcie_cfgx_read(pcie_port, CVMX_PCIERCX_CFG034(pcie_port));
- /* Hot-plug interrupt enable. */
- pciercx_cfg034.s.hpint_en = 1;
- /* Data Link Layer state changed enable */
- pciercx_cfg034.s.dlls_en = 1;
- /* Command completed interrupt enable. */
- pciercx_cfg034.s.ccint_en = 1;
- cvmx_pcie_cfgx_write(pcie_port, CVMX_PCIERCX_CFG034(pcie_port),
- pciercx_cfg034.u32);
+ 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);
}
/**
- * Initialize a host mode PCIe link. This function takes a PCIe
+ * Initialize a host mode PCIe gen 1 link. This function takes a PCIe
* port from reset to a link up state. Software can then begin
* configuring the rest of the link.
*
@@ -555,7 +583,7 @@ static void __cvmx_pcie_rc_initialize_config_space(int pcie_port)
*
* Returns Zero on success
*/
-static int __cvmx_pcie_rc_initialize_link(int pcie_port)
+static int __cvmx_pcie_rc_initialize_link_gen1(int pcie_port)
{
uint64_t start_cycle;
union cvmx_pescx_ctl_status pescx_ctl_status;
@@ -564,18 +592,15 @@ static int __cvmx_pcie_rc_initialize_link(int pcie_port)
union cvmx_pciercx_cfg448 pciercx_cfg448;
/* Set the lane width */
- pciercx_cfg452.u32 =
- cvmx_pcie_cfgx_read(pcie_port, CVMX_PCIERCX_CFG452(pcie_port));
+ pciercx_cfg452.u32 = cvmx_pcie_cfgx_read(pcie_port, CVMX_PCIERCX_CFG452(pcie_port));
pescx_ctl_status.u64 = cvmx_read_csr(CVMX_PESCX_CTL_STATUS(pcie_port));
- if (pescx_ctl_status.s.qlm_cfg == 0) {
+ if (pescx_ctl_status.s.qlm_cfg == 0)
/* We're in 8 lane (56XX) or 4 lane (54XX) mode */
pciercx_cfg452.s.lme = 0xf;
- } else {
+ else
/* We're in 4 lane (56XX) or 2 lane (52XX) mode */
pciercx_cfg452.s.lme = 0x7;
- }
- cvmx_pcie_cfgx_write(pcie_port, CVMX_PCIERCX_CFG452(pcie_port),
- pciercx_cfg452.u32);
+ cvmx_pcie_cfgx_write(pcie_port, CVMX_PCIERCX_CFG452(pcie_port), pciercx_cfg452.u32);
/*
* CN52XX pass 1.x has an errata where length mismatches on UR
@@ -584,19 +609,15 @@ static int __cvmx_pcie_rc_initialize_link(int pcie_port)
*/
if (OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X)) {
union cvmx_pciercx_cfg455 pciercx_cfg455;
- pciercx_cfg455.u32 =
- cvmx_pcie_cfgx_read(pcie_port,
- CVMX_PCIERCX_CFG455(pcie_port));
+ pciercx_cfg455.u32 = cvmx_pcie_cfgx_read(pcie_port, CVMX_PCIERCX_CFG455(pcie_port));
pciercx_cfg455.s.m_cpl_len_err = 1;
- cvmx_pcie_cfgx_write(pcie_port, CVMX_PCIERCX_CFG455(pcie_port),
- pciercx_cfg455.u32);
+ cvmx_pcie_cfgx_write(pcie_port, CVMX_PCIERCX_CFG455(pcie_port), pciercx_cfg455.u32);
}
/* Lane swap needs to be manually enabled for CN52XX */
if (OCTEON_IS_MODEL(OCTEON_CN52XX) && (pcie_port == 1)) {
pescx_ctl_status.s.lane_swp = 1;
- cvmx_write_csr(CVMX_PESCX_CTL_STATUS(pcie_port),
- pescx_ctl_status.u64);
+ cvmx_write_csr(CVMX_PESCX_CTL_STATUS(pcie_port), pescx_ctl_status.u64);
}
/* Bring up the link */
@@ -612,24 +633,18 @@ static int __cvmx_pcie_rc_initialize_link(int pcie_port)
__cvmx_helper_errata_qlm_disable_2nd_order_cdr(0);
/* Wait for the link to come up */
- cvmx_dprintf("PCIe: Waiting for port %d link\n", pcie_port);
start_cycle = cvmx_get_cycle();
do {
- if (cvmx_get_cycle() - start_cycle >
- 2 * cvmx_sysinfo_get()->cpu_clock_hz) {
- cvmx_dprintf("PCIe: Port %d link timeout\n",
- pcie_port);
+ if (cvmx_get_cycle() - start_cycle > 2 * octeon_get_clock_rate()) {
+ cvmx_dprintf("PCIe: Port %d link timeout\n", pcie_port);
return -1;
}
cvmx_wait(10000);
- pciercx_cfg032.u32 =
- cvmx_pcie_cfgx_read(pcie_port,
- CVMX_PCIERCX_CFG032(pcie_port));
+ pciercx_cfg032.u32 = cvmx_pcie_cfgx_read(pcie_port, CVMX_PCIERCX_CFG032(pcie_port));
} while (pciercx_cfg032.s.dlla == 0);
- /* Display the link status */
- cvmx_dprintf("PCIe: Port %d link active, %d lanes\n", pcie_port,
- pciercx_cfg032.s.nlw);
+ /* Clear all pending errors */
+ cvmx_write_csr(CVMX_PEXP_NPEI_INT_SUM, cvmx_read_csr(CVMX_PEXP_NPEI_INT_SUM));
/*
* Update the Replay Time Limit. Empirically, some PCIe
@@ -639,8 +654,7 @@ static int __cvmx_pcie_rc_initialize_link(int pcie_port)
* 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));
+ 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;
@@ -655,21 +669,28 @@ static int __cvmx_pcie_rc_initialize_link(int pcie_port)
pciercx_cfg448.s.rtl = 258;
break;
}
- cvmx_pcie_cfgx_write(pcie_port, CVMX_PCIERCX_CFG448(pcie_port),
- pciercx_cfg448.u32);
+ cvmx_pcie_cfgx_write(pcie_port, CVMX_PCIERCX_CFG448(pcie_port), pciercx_cfg448.u32);
return 0;
}
+static void __cvmx_increment_ba(union cvmx_sli_mem_access_subidx *pmas)
+{
+ if (OCTEON_IS_MODEL(OCTEON_CN68XX))
+ pmas->cn68xx.ba++;
+ else
+ pmas->cn63xx.ba++;
+}
+
/**
- * Initialize a PCIe port for use in host(RC) mode. It doesn't
+ * Initialize a PCIe gen 1 port for use in host(RC) mode. It doesn't
* enumerate the bus.
*
* @pcie_port: PCIe port to initialize
*
* Returns Zero on success
*/
-static int cvmx_pcie_rc_initialize(int pcie_port)
+static int __cvmx_pcie_rc_initialize_gen1(int pcie_port)
{
int i;
int base;
@@ -682,16 +703,17 @@ static int cvmx_pcie_rc_initialize(int pcie_port)
union cvmx_npei_mem_access_subidx mem_access_subid;
union cvmx_npei_dbg_data npei_dbg_data;
union cvmx_pescx_ctl_status2 pescx_ctl_status2;
+ union cvmx_pciercx_cfg032 pciercx_cfg032;
union cvmx_npei_bar1_indexx bar1_index;
+retry:
/*
* Make sure we aren't trying to setup a target mode interface
* in host mode.
*/
npei_ctl_status.u64 = cvmx_read_csr(CVMX_PEXP_NPEI_CTL_STATUS);
if ((pcie_port == 0) && !npei_ctl_status.s.host_mode) {
- cvmx_dprintf("PCIe: ERROR: cvmx_pcie_rc_initialize() called "
- "on port0, but port0 is not in host mode\n");
+ cvmx_dprintf("PCIe: Port %d in endpoint mode\n", pcie_port);
return -1;
}
@@ -702,9 +724,7 @@ static int cvmx_pcie_rc_initialize(int pcie_port)
if (OCTEON_IS_MODEL(OCTEON_CN52XX)) {
npei_dbg_data.u64 = cvmx_read_csr(CVMX_PEXP_NPEI_DBG_DATA);
if ((pcie_port == 1) && npei_dbg_data.cn52xx.qlm0_link_width) {
- cvmx_dprintf("PCIe: ERROR: cvmx_pcie_rc_initialize() "
- "called on port1, but port1 is "
- "disabled\n");
+ cvmx_dprintf("PCIe: ERROR: cvmx_pcie_rc_initialize() called on port1, but port1 is disabled\n");
return -1;
}
}
@@ -733,7 +753,7 @@ static int cvmx_pcie_rc_initialize(int pcie_port)
* the board. As a workaround for this bug, we bring
* both PCIe ports out of reset at the same time
* instead of on separate calls. So for port 0, we
- * bring both out of reset and do nothing on port 1.
+ * bring both out of reset and do nothing on port 1
*/
if (pcie_port == 0) {
ciu_soft_prst.u64 = cvmx_read_csr(CVMX_CIU_SOFT_PRST);
@@ -746,13 +766,10 @@ static int cvmx_pcie_rc_initialize(int pcie_port)
if (ciu_soft_prst.s.soft_prst == 0) {
/* Reset the ports */
ciu_soft_prst.s.soft_prst = 1;
- cvmx_write_csr(CVMX_CIU_SOFT_PRST,
- ciu_soft_prst.u64);
- ciu_soft_prst.u64 =
- cvmx_read_csr(CVMX_CIU_SOFT_PRST1);
+ cvmx_write_csr(CVMX_CIU_SOFT_PRST, ciu_soft_prst.u64);
+ ciu_soft_prst.u64 = cvmx_read_csr(CVMX_CIU_SOFT_PRST1);
ciu_soft_prst.s.soft_prst = 1;
- cvmx_write_csr(CVMX_CIU_SOFT_PRST1,
- ciu_soft_prst.u64);
+ cvmx_write_csr(CVMX_CIU_SOFT_PRST1, ciu_soft_prst.u64);
/* Wait until pcie resets the ports. */
udelay(2000);
}
@@ -782,11 +799,9 @@ static int cvmx_pcie_rc_initialize(int pcie_port)
/* Reset the port */
ciu_soft_prst.s.soft_prst = 1;
if (pcie_port)
- cvmx_write_csr(CVMX_CIU_SOFT_PRST1,
- ciu_soft_prst.u64);
+ cvmx_write_csr(CVMX_CIU_SOFT_PRST1, ciu_soft_prst.u64);
else
- cvmx_write_csr(CVMX_CIU_SOFT_PRST,
- ciu_soft_prst.u64);
+ cvmx_write_csr(CVMX_CIU_SOFT_PRST, ciu_soft_prst.u64);
/* Wait until pcie resets the ports. */
udelay(2000);
}
@@ -808,25 +823,21 @@ static int cvmx_pcie_rc_initialize(int pcie_port)
*/
cvmx_wait(400000);
- /* PESCX_BIST_STATUS2[PCLK_RUN] was missing on pass 1 of CN56XX and
- CN52XX, so we only probe it on newer chips */
- if (!OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_X)
- && !OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X)) {
+ /*
+ * PESCX_BIST_STATUS2[PCLK_RUN] was missing on pass 1 of
+ * CN56XX and CN52XX, so we only probe it on newer chips
+ */
+ if (!OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_X) && !OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X)) {
/* Clear PCLK_RUN so we can check if the clock is running */
- pescx_ctl_status2.u64 =
- cvmx_read_csr(CVMX_PESCX_CTL_STATUS2(pcie_port));
+ pescx_ctl_status2.u64 = cvmx_read_csr(CVMX_PESCX_CTL_STATUS2(pcie_port));
pescx_ctl_status2.s.pclk_run = 1;
- cvmx_write_csr(CVMX_PESCX_CTL_STATUS2(pcie_port),
- pescx_ctl_status2.u64);
- /*
- * Now that we cleared PCLK_RUN, wait for it to be set
- * again telling us the clock is running.
+ cvmx_write_csr(CVMX_PESCX_CTL_STATUS2(pcie_port), pescx_ctl_status2.u64);
+ /* Now that we cleared PCLK_RUN, wait for it to be set
+ * again telling us the clock is running
*/
if (CVMX_WAIT_FOR_FIELD64(CVMX_PESCX_CTL_STATUS2(pcie_port),
- union cvmx_pescx_ctl_status2,
- pclk_run, ==, 1, 10000)) {
- cvmx_dprintf("PCIe: Port %d isn't clocked, skipping.\n",
- pcie_port);
+ union cvmx_pescx_ctl_status2, pclk_run, ==, 1, 10000)) {
+ cvmx_dprintf("PCIe: Port %d isn't clocked, skipping.\n", pcie_port);
return -1;
}
}
@@ -836,30 +847,26 @@ static int cvmx_pcie_rc_initialize(int pcie_port)
* the board probably hasn't wired the clocks up and the
* interface should be skipped.
*/
- pescx_ctl_status2.u64 =
- cvmx_read_csr(CVMX_PESCX_CTL_STATUS2(pcie_port));
+ pescx_ctl_status2.u64 = cvmx_read_csr(CVMX_PESCX_CTL_STATUS2(pcie_port));
if (pescx_ctl_status2.s.pcierst) {
- cvmx_dprintf("PCIe: Port %d stuck in reset, skipping.\n",
- pcie_port);
+ cvmx_dprintf("PCIe: Port %d stuck in reset, skipping.\n", pcie_port);
return -1;
}
/*
- * Check BIST2 status. If any bits are set skip this interface. This
- * is an attempt to catch PCIE-813 on pass 1 parts.
+ * Check BIST2 status. If any bits are set skip this
+ * interface. This is an attempt to catch PCIE-813 on pass 1
+ * parts.
*/
- pescx_bist_status2.u64 =
- cvmx_read_csr(CVMX_PESCX_BIST_STATUS2(pcie_port));
+ pescx_bist_status2.u64 = cvmx_read_csr(CVMX_PESCX_BIST_STATUS2(pcie_port));
if (pescx_bist_status2.u64) {
- cvmx_dprintf("PCIe: Port %d BIST2 failed. Most likely this "
- "port isn't hooked up, skipping.\n",
+ cvmx_dprintf("PCIe: Port %d BIST2 failed. Most likely this port isn't hooked up, skipping.\n",
pcie_port);
return -1;
}
/* Check BIST status */
- pescx_bist_status.u64 =
- cvmx_read_csr(CVMX_PESCX_BIST_STATUS(pcie_port));
+ pescx_bist_status.u64 = cvmx_read_csr(CVMX_PESCX_BIST_STATUS(pcie_port));
if (pescx_bist_status.u64)
cvmx_dprintf("PCIe: BIST FAILED for port %d (0x%016llx)\n",
pcie_port, CAST64(pescx_bist_status.u64));
@@ -868,50 +875,37 @@ static int cvmx_pcie_rc_initialize(int pcie_port)
__cvmx_pcie_rc_initialize_config_space(pcie_port);
/* Bring the link up */
- if (__cvmx_pcie_rc_initialize_link(pcie_port)) {
- cvmx_dprintf
- ("PCIe: ERROR: cvmx_pcie_rc_initialize_link() failed\n");
+ if (__cvmx_pcie_rc_initialize_link_gen1(pcie_port)) {
+ cvmx_dprintf("PCIe: Failed to initialize port %d, probably the slot is empty\n",
+ pcie_port);
return -1;
}
/* Store merge control (NPEI_MEM_ACCESS_CTL[TIMER,MAX_WORD]) */
npei_mem_access_ctl.u64 = cvmx_read_csr(CVMX_PEXP_NPEI_MEM_ACCESS_CTL);
- /* Allow 16 words to combine */
- npei_mem_access_ctl.s.max_word = 0;
- /* Wait up to 127 cycles for more data */
- npei_mem_access_ctl.s.timer = 127;
+ npei_mem_access_ctl.s.max_word = 0; /* Allow 16 words to combine */
+ npei_mem_access_ctl.s.timer = 127; /* Wait up to 127 cycles for more data */
cvmx_write_csr(CVMX_PEXP_NPEI_MEM_ACCESS_CTL, npei_mem_access_ctl.u64);
/* Setup Mem access SubDIDs */
mem_access_subid.u64 = 0;
- /* Port the request is sent to. */
- mem_access_subid.s.port = pcie_port;
- /* Due to an errata on pass 1 chips, no merging is allowed. */
- mem_access_subid.s.nmerge = 1;
- /* Endian-swap for Reads. */
- mem_access_subid.s.esr = 1;
- /* Endian-swap for Writes. */
- mem_access_subid.s.esw = 1;
- /* No Snoop for Reads. */
- mem_access_subid.s.nsr = 1;
- /* No Snoop for Writes. */
- mem_access_subid.s.nsw = 1;
- /* Disable Relaxed Ordering for Reads. */
- mem_access_subid.s.ror = 0;
- /* Disable Relaxed Ordering for Writes. */
- mem_access_subid.s.row = 0;
- /* PCIe Address Bits <63:34>. */
- mem_access_subid.s.ba = 0;
+ mem_access_subid.s.port = pcie_port; /* Port the request is sent to. */
+ mem_access_subid.s.nmerge = 1; /* Due to an errata on pass 1 chips, no merging is allowed. */
+ mem_access_subid.s.esr = 1; /* Endian-swap for Reads. */
+ mem_access_subid.s.esw = 1; /* Endian-swap for Writes. */
+ mem_access_subid.s.nsr = 0; /* Enable Snooping for Reads. Octeon doesn't care, but devices might want this more conservative setting */
+ mem_access_subid.s.nsw = 0; /* Enable Snoop for Writes. */
+ mem_access_subid.s.ror = 0; /* Disable Relaxed Ordering for Reads. */
+ mem_access_subid.s.row = 0; /* Disable Relaxed Ordering for Writes. */
+ mem_access_subid.s.ba = 0; /* PCIe Adddress Bits <63:34>. */
/*
* 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_NPEI_MEM_ACCESS_SUBIDX(i),
- mem_access_subid.u64);
- /* Set each SUBID to extend the addressable range */
- mem_access_subid.s.ba += 1;
+ cvmx_write_csr(CVMX_PEXP_NPEI_MEM_ACCESS_SUBIDX(i), mem_access_subid.u64);
+ mem_access_subid.s.ba += 1; /* Set each SUBID to extend the addressable range */
}
/*
@@ -927,7 +921,7 @@ static int cvmx_pcie_rc_initialize(int pcie_port)
/* Set Octeon's BAR0 to decode 0-16KB. It overlaps with Bar2 */
cvmx_write_csr(CVMX_PESCX_P2N_BAR0_START(pcie_port), 0);
- /* BAR1 follows BAR2 with a gap. */
+ /* BAR1 follows BAR2 with a gap so it has the same address as for gen2. */
cvmx_write_csr(CVMX_PESCX_P2N_BAR1_START(pcie_port), CVMX_PCIE_BAR1_RC_BASE);
bar1_index.u32 = 0;
@@ -992,14 +986,474 @@ static int cvmx_pcie_rc_initialize(int pcie_port)
npei_ctl_port.s.waitl_com = 0;
cvmx_write_csr(CVMX_PEXP_NPEI_CTL_PORT0, npei_ctl_port.u64);
}
+
+ /*
+ * Both pass 1 and pass 2 of CN52XX and CN56XX have an errata
+ * that causes TLP ordering to not be preserved after multiple
+ * PCIe port resets. This code detects this fault and corrects
+ * it by aligning the TLP counters properly. Another link
+ * reset is then performed. See PCIE-13340
+ */
+ if (OCTEON_IS_MODEL(OCTEON_CN56XX_PASS2_X) ||
+ OCTEON_IS_MODEL(OCTEON_CN52XX_PASS2_X) ||
+ OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_X) ||
+ OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X)) {
+ union cvmx_npei_dbg_data dbg_data;
+ int old_in_fif_p_count;
+ int in_fif_p_count;
+ int out_p_count;
+ int in_p_offset = (OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X) || OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_X)) ? 4 : 1;
+ int i;
+
+ /*
+ * Choose a write address of 1MB. It should be
+ * harmless as all bars haven't been setup.
+ */
+ uint64_t write_address = (cvmx_pcie_get_mem_base_address(pcie_port) + 0x100000) | (1ull<<63);
+
+ /*
+ * Make sure at least in_p_offset have been executed before we try and
+ * read in_fif_p_count
+ */
+ i = in_p_offset;
+ while (i--) {
+ cvmx_write64_uint32(write_address, 0);
+ cvmx_wait(10000);
+ }
+
+ /*
+ * Read the IN_FIF_P_COUNT from the debug
+ * select. IN_FIF_P_COUNT can be unstable sometimes so
+ * read it twice with a write between the reads. This
+ * way we can tell the value is good as it will
+ * increment by one due to the write
+ */
+ cvmx_write_csr(CVMX_PEXP_NPEI_DBG_SELECT, (pcie_port) ? 0xd7fc : 0xcffc);
+ cvmx_read_csr(CVMX_PEXP_NPEI_DBG_SELECT);
+ do {
+ dbg_data.u64 = cvmx_read_csr(CVMX_PEXP_NPEI_DBG_DATA);
+ old_in_fif_p_count = dbg_data.s.data & 0xff;
+ cvmx_write64_uint32(write_address, 0);
+ cvmx_wait(10000);
+ dbg_data.u64 = cvmx_read_csr(CVMX_PEXP_NPEI_DBG_DATA);
+ in_fif_p_count = dbg_data.s.data & 0xff;
+ } while (in_fif_p_count != ((old_in_fif_p_count+1) & 0xff));
+
+ /* Update in_fif_p_count for it's offset with respect to out_p_count */
+ in_fif_p_count = (in_fif_p_count + in_p_offset) & 0xff;
+
+ /* Read the OUT_P_COUNT from the debug select */
+ cvmx_write_csr(CVMX_PEXP_NPEI_DBG_SELECT, (pcie_port) ? 0xd00f : 0xc80f);
+ cvmx_read_csr(CVMX_PEXP_NPEI_DBG_SELECT);
+ dbg_data.u64 = cvmx_read_csr(CVMX_PEXP_NPEI_DBG_DATA);
+ out_p_count = (dbg_data.s.data>>1) & 0xff;
+
+ /* Check that the two counters are aligned */
+ if (out_p_count != in_fif_p_count) {
+ cvmx_dprintf("PCIe: Port %d aligning TLP counters as workaround to maintain ordering\n", pcie_port);
+ while (in_fif_p_count != 0) {
+ cvmx_write64_uint32(write_address, 0);
+ cvmx_wait(10000);
+ in_fif_p_count = (in_fif_p_count + 1) & 0xff;
+ }
+ /*
+ * The EBH5200 board swapped the PCIe reset
+ * lines on the board. This means we must
+ * bring both links down and up, which will
+ * cause the PCIe0 to need alignment
+ * again. Lots of messages will be displayed,
+ * but everything should work
+ */
+ if ((cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_EBH5200) &&
+ (pcie_port == 1))
+ cvmx_pcie_rc_initialize(0);
+ /* Rety bringing this port up */
+ goto retry;
+ }
+ }
+
+ /* Display the link status */
+ pciercx_cfg032.u32 = cvmx_pcie_cfgx_read(pcie_port, CVMX_PCIERCX_CFG032(pcie_port));
+ cvmx_dprintf("PCIe: Port %d link active, %d lanes\n", pcie_port, pciercx_cfg032.s.nlw);
+
return 0;
}
+/**
+ * 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.
+ *
+ * @pcie_port: PCIe port to initialize
+ *
+ * Return Zero on success.
+ */
+static int __cvmx_pcie_rc_initialize_link_gen2(int pcie_port)
+{
+ uint64_t start_cycle;
+ union cvmx_pemx_ctl_status pem_ctl_status;
+ union cvmx_pciercx_cfg032 pciercx_cfg032;
+ union cvmx_pciercx_cfg448 pciercx_cfg448;
-/* Above was cvmx-pcie.c, below original pcie.c */
+ /* 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 = cvmx_get_cycle();
+ do {
+ if (cvmx_get_cycle() - start_cycle > octeon_get_clock_rate())
+ return -1;
+ cvmx_wait(10000);
+ 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;
+}
/**
+ * Initialize a PCIe gen 2 port for use in host(RC) mode. It doesn't enumerate
+ * the bus.
+ *
+ * @pcie_port: PCIe port to initialize
+ *
+ * Returns Zero on success.
+ */
+static int __cvmx_pcie_rc_initialize_gen2(int pcie_port)
+{
+ int i;
+ union cvmx_ciu_soft_prst ciu_soft_prst;
+ union cvmx_mio_rst_ctlx mio_rst_ctl;
+ union cvmx_pemx_bar_ctl pemx_bar_ctl;
+ union cvmx_pemx_ctl_status pemx_ctl_status;
+ union cvmx_pemx_bist_status pemx_bist_status;
+ union cvmx_pemx_bist_status2 pemx_bist_status2;
+ union cvmx_pciercx_cfg032 pciercx_cfg032;
+ union cvmx_pciercx_cfg515 pciercx_cfg515;
+ union cvmx_sli_ctl_portx sli_ctl_portx;
+ union cvmx_sli_mem_access_ctl sli_mem_access_ctl;
+ union cvmx_sli_mem_access_subidx mem_access_subid;
+ union cvmx_sriox_status_reg sriox_status_reg;
+ union cvmx_pemx_bar1_indexx bar1_index;
+
+ if (octeon_has_feature(OCTEON_FEATURE_SRIO)) {
+ /* Make sure this interface isn't SRIO */
+ if (OCTEON_IS_MODEL(OCTEON_CN66XX)) {
+ /*
+ * The CN66XX requires reading the
+ * MIO_QLMX_CFG register to figure out the
+ * port type.
+ */
+ union cvmx_mio_qlmx_cfg qlmx_cfg;
+ qlmx_cfg.u64 = cvmx_read_csr(CVMX_MIO_QLMX_CFG(pcie_port));
+
+ if (qlmx_cfg.s.qlm_spd == 15) {
+ pr_notice("PCIe: Port %d is disabled, skipping.\n", pcie_port);
+ return -1;
+ }
+
+ switch (qlmx_cfg.s.qlm_spd) {
+ case 0x1: /* SRIO 1x4 short */
+ case 0x3: /* SRIO 1x4 long */
+ case 0x4: /* SRIO 2x2 short */
+ case 0x6: /* SRIO 2x2 long */
+ pr_notice("PCIe: Port %d is SRIO, skipping.\n", pcie_port);
+ return -1;
+ case 0x9: /* SGMII */
+ pr_notice("PCIe: Port %d is SGMII, skipping.\n", pcie_port);
+ return -1;
+ case 0xb: /* XAUI */
+ pr_notice("PCIe: Port %d is XAUI, skipping.\n", pcie_port);
+ return -1;
+ case 0x0: /* PCIE gen2 */
+ case 0x8: /* PCIE gen2 (alias) */
+ case 0x2: /* PCIE gen1 */
+ case 0xa: /* PCIE gen1 (alias) */
+ break;
+ default:
+ pr_notice("PCIe: Port %d is unknown, skipping.\n", pcie_port);
+ return -1;
+ }
+ } else {
+ sriox_status_reg.u64 = cvmx_read_csr(CVMX_SRIOX_STATUS_REG(pcie_port));
+ if (sriox_status_reg.s.srio) {
+ pr_notice("PCIe: Port %d is SRIO, skipping.\n", pcie_port);
+ return -1;
+ }
+ }
+ }
+
+#if 0
+ /* This code is so that the PCIe analyzer is able to see 63XX traffic */
+ pr_notice("PCIE : init for pcie analyzer.\n");
+ cvmx_helper_qlm_jtag_init();
+ cvmx_helper_qlm_jtag_shift_zeros(pcie_port, 85);
+ cvmx_helper_qlm_jtag_shift(pcie_port, 1, 1);
+ cvmx_helper_qlm_jtag_shift_zeros(pcie_port, 300-86);
+ cvmx_helper_qlm_jtag_shift_zeros(pcie_port, 85);
+ cvmx_helper_qlm_jtag_shift(pcie_port, 1, 1);
+ cvmx_helper_qlm_jtag_shift_zeros(pcie_port, 300-86);
+ cvmx_helper_qlm_jtag_shift_zeros(pcie_port, 85);
+ cvmx_helper_qlm_jtag_shift(pcie_port, 1, 1);
+ cvmx_helper_qlm_jtag_shift_zeros(pcie_port, 300-86);
+ cvmx_helper_qlm_jtag_shift_zeros(pcie_port, 85);
+ cvmx_helper_qlm_jtag_shift(pcie_port, 1, 1);
+ cvmx_helper_qlm_jtag_shift_zeros(pcie_port, 300-86);
+ cvmx_helper_qlm_jtag_update(pcie_port);
+#endif
+
+ /* Make sure we aren't trying to setup a target mode interface in host mode */
+ mio_rst_ctl.u64 = cvmx_read_csr(CVMX_MIO_RST_CTLX(pcie_port));
+ if (!mio_rst_ctl.s.host_mode) {
+ pr_notice("PCIe: Port %d in endpoint mode.\n", 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) {
+ union cvmx_ciu_qlm1 ciu_qlm;
+ ciu_qlm.u64 = cvmx_read_csr(CVMX_CIU_QLM1);
+ ciu_qlm.s.txbypass = 1;
+ ciu_qlm.s.txdeemph = 5;
+ ciu_qlm.s.txmargin = 0x17;
+ cvmx_write_csr(CVMX_CIU_QLM1, ciu_qlm.u64);
+ } else {
+ union cvmx_ciu_qlm0 ciu_qlm;
+ ciu_qlm.u64 = cvmx_read_csr(CVMX_CIU_QLM0);
+ ciu_qlm.s.txbypass = 1;
+ ciu_qlm.s.txdeemph = 5;
+ ciu_qlm.s.txmargin = 0x17;
+ cvmx_write_csr(CVMX_CIU_QLM0, ciu_qlm.u64);
+ }
+ }
+ /* Bring the PCIe out of reset */
+ if (pcie_port)
+ ciu_soft_prst.u64 = cvmx_read_csr(CVMX_CIU_SOFT_PRST1);
+ else
+ ciu_soft_prst.u64 = cvmx_read_csr(CVMX_CIU_SOFT_PRST);
+ /*
+ * 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;
+ if (pcie_port)
+ cvmx_write_csr(CVMX_CIU_SOFT_PRST1, ciu_soft_prst.u64);
+ else
+ cvmx_write_csr(CVMX_CIU_SOFT_PRST, ciu_soft_prst.u64);
+ /* Wait until pcie resets the ports. */
+ udelay(2000);
+ }
+ if (pcie_port) {
+ ciu_soft_prst.u64 = cvmx_read_csr(CVMX_CIU_SOFT_PRST1);
+ ciu_soft_prst.s.soft_prst = 0;
+ cvmx_write_csr(CVMX_CIU_SOFT_PRST1, ciu_soft_prst.u64);
+ } else {
+ ciu_soft_prst.u64 = cvmx_read_csr(CVMX_CIU_SOFT_PRST);
+ ciu_soft_prst.s.soft_prst = 0;
+ cvmx_write_csr(CVMX_CIU_SOFT_PRST, ciu_soft_prst.u64);
+ }
+
+ /* Wait 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(CVMX_MIO_RST_CTLX(pcie_port), union cvmx_mio_rst_ctlx, rst_done, ==, 1, 10000)) {
+ pr_notice("PCIe: Port %d stuck in reset, skipping.\n", 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)
+ pr_notice("PCIe: BIST FAILED for port %d (0x%016llx)\n", 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)
+ pr_notice("PCIe: BIST2 FAILED for port %d (0x%016llx)\n", pcie_port, CAST64(pemx_bist_status2.u64));
+
+ /* Initialize the config space CSRs */
+ __cvmx_pcie_rc_initialize_config_space(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(pcie_port)) {
+ /*
+ * Some gen1 devices don't handle the gen 2 training
+ * correctly. Disable gen2 and try again with only
+ * gen1
+ */
+ union cvmx_pciercx_cfg031 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(pcie_port)) {
+ pr_notice("PCIe: Link timeout on port %d, probably the slot is empty\n", pcie_port);
+ return -1;
+ }
+ }
+
+ /* 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 = 1; /* Endian-swap for Reads. */
+ mem_access_subid.s.esw = 1; /* 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 Adddress 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);
+ }
+
+ /*
+ * 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 = 1;
+ 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 = 1; /* 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);
+ }
+
+ /*
+ * Allow config retries for 250ms. Count is based off the 5Ghz
+ * SERDES clock.
+ */
+ pemx_ctl_status.u64 = cvmx_read_csr(CVMX_PEMX_CTL_STATUS(pcie_port));
+ pemx_ctl_status.s.cfg_rtry = 250 * 5000000 / 0x10000;
+ cvmx_write_csr(CVMX_PEMX_CTL_STATUS(pcie_port), pemx_ctl_status.u64);
+
+ /* Display the link status */
+ pciercx_cfg032.u32 = cvmx_pcie_cfgx_read(pcie_port, CVMX_PCIERCX_CFG032(pcie_port));
+ pr_notice("PCIe: Port %d link active, %d lanes, speed gen%d\n", pcie_port, pciercx_cfg032.s.nlw, pciercx_cfg032.s.ls);
+
+ return 0;
+}
+
+/**
+ * Initialize a PCIe port for use in host(RC) mode. It doesn't enumerate the bus.
+ *
+ * @pcie_port: PCIe port to initialize
+ *
+ * Returns Zero on success
+ */
+static int cvmx_pcie_rc_initialize(int pcie_port)
+{
+ int result;
+ if (octeon_has_feature(OCTEON_FEATURE_NPEI))
+ result = __cvmx_pcie_rc_initialize_gen1(pcie_port);
+ else
+ result = __cvmx_pcie_rc_initialize_gen2(pcie_port);
+ return result;
+}
+
+/* Above was cvmx-pcie.c, below original pcie.c */
+
+/**
* Map a PCI device to the appropriate interrupt line
*
* @dev: The Linux PCI device structure for the device to map
@@ -1027,11 +1481,12 @@ int __init octeon_pcie_pcibios_map_irq(const struct pci_dev *dev,
*/
while (dev->bus && dev->bus->parent)
dev = to_pci_dev(dev->bus->bridge);
- /* If the root bus is number 0 and the PEX 8114 is the
+ /*
+ * If the root bus is number 0 and the PEX 8114 is the
* root, assume we are behind the miswired bus. We
* need to correct the swizzle level by two. Yuck.
*/
- if ((dev->bus->number == 0) &&
+ if ((dev->bus->number == 1) &&
(dev->vendor == 0x10b5) && (dev->device == 0x8114)) {
/*
* The pin field is one based, not zero. We
@@ -1048,39 +1503,73 @@ int __init octeon_pcie_pcibios_map_irq(const struct pci_dev *dev,
return pin - 1 + OCTEON_IRQ_PCI_INT0;
}
-/**
+static void set_cfg_read_retry(u32 retry_cnt)
+{
+ union cvmx_pemx_ctl_status pemx_ctl;
+ pemx_ctl.u64 = cvmx_read_csr(CVMX_PEMX_CTL_STATUS(1));
+ pemx_ctl.s.cfg_rtry = retry_cnt;
+ cvmx_write_csr(CVMX_PEMX_CTL_STATUS(1), pemx_ctl.u64);
+}
+
+
+static u32 disable_cfg_read_retry(void)
+{
+ u32 retry_cnt;
+
+ union cvmx_pemx_ctl_status pemx_ctl;
+ pemx_ctl.u64 = cvmx_read_csr(CVMX_PEMX_CTL_STATUS(1));
+ retry_cnt = pemx_ctl.s.cfg_rtry;
+ pemx_ctl.s.cfg_rtry = 0;
+ cvmx_write_csr(CVMX_PEMX_CTL_STATUS(1), pemx_ctl.u64);
+ return retry_cnt;
+}
+
+static int is_cfg_retry(void)
+{
+ union cvmx_pemx_int_sum pemx_int_sum;
+ pemx_int_sum.u64 = cvmx_read_csr(CVMX_PEMX_INT_SUM(1));
+ if (pemx_int_sum.s.crs_dr)
+ return 1;
+ return 0;
+}
+
+/*
* Read a value from configuration space
*
- * @bus:
- * @devfn:
- * @reg:
- * @size:
- * @val:
- * Returns
*/
-static inline int octeon_pcie_read_config(int pcie_port, struct pci_bus *bus,
- unsigned int devfn, int reg, int size,
- u32 *val)
+static int octeon_pcie_read_config(unsigned int pcie_port, struct pci_bus *bus,
+ unsigned int devfn, int reg, int size,
+ u32 *val)
{
union octeon_cvmemctl cvmmemctl;
union octeon_cvmemctl cvmmemctl_save;
int bus_number = bus->number;
+ int cfg_retry = 0;
+ int retry_cnt = 0;
+ int max_retry_cnt = 10;
+ u32 cfg_retry_cnt = 0;
+ cvmmemctl_save.u64 = 0;
+ BUG_ON(pcie_port >= ARRAY_SIZE(enable_pcie_bus_num_war));
/*
* For the top level bus make sure our hardware bus number
- * matches the software one.
+ * matches the software one
*/
if (bus->parent == NULL) {
- union cvmx_pciercx_cfg006 pciercx_cfg006;
- pciercx_cfg006.u32 = cvmx_pcie_cfgx_read(pcie_port,
- CVMX_PCIERCX_CFG006(pcie_port));
- if (pciercx_cfg006.s.pbnum != bus_number) {
- pciercx_cfg006.s.pbnum = bus_number;
- pciercx_cfg006.s.sbnum = bus_number;
- pciercx_cfg006.s.subbnum = bus_number;
- cvmx_pcie_cfgx_write(pcie_port,
- CVMX_PCIERCX_CFG006(pcie_port),
- pciercx_cfg006.u32);
+ if (enable_pcie_bus_num_war[pcie_port])
+ bus_number = 0;
+ else {
+ union cvmx_pciercx_cfg006 pciercx_cfg006;
+ pciercx_cfg006.u32 = cvmx_pcie_cfgx_read(pcie_port,
+ CVMX_PCIERCX_CFG006(pcie_port));
+ if (pciercx_cfg006.s.pbnum != bus_number) {
+ pciercx_cfg006.s.pbnum = bus_number;
+ pciercx_cfg006.s.sbnum = bus_number;
+ pciercx_cfg006.s.subbnum = bus_number;
+ cvmx_pcie_cfgx_write(pcie_port,
+ CVMX_PCIERCX_CFG006(pcie_port),
+ pciercx_cfg006.u32);
+ }
}
}
@@ -1116,29 +1605,52 @@ static inline int octeon_pcie_read_config(int pcie_port, struct pci_bus *bus,
*/
#if 1
/* Use this option if you aren't using either slot */
- if (bus_number == 1)
+ if (bus_number == 2)
return PCIBIOS_FUNC_NOT_SUPPORTED;
#elif 0
/*
* Use this option if you are using the first slot but
* not the second.
*/
- if ((bus_number == 1) && (devfn >> 3 != 2))
+ if ((bus_number == 2) && (devfn >> 3 != 2))
return PCIBIOS_FUNC_NOT_SUPPORTED;
#elif 0
/*
* Use this option if you are using the second slot
* but not the first.
*/
- if ((bus_number == 1) && (devfn >> 3 != 3))
+ if ((bus_number == 2) && (devfn >> 3 != 3))
return PCIBIOS_FUNC_NOT_SUPPORTED;
#elif 0
/* Use this opion if you are using both slots */
- if ((bus_number == 1) &&
+ if ((bus_number == 2) &&
!((devfn == (2 << 3)) || (devfn == (3 << 3))))
return PCIBIOS_FUNC_NOT_SUPPORTED;
#endif
+ /* The following #if gives a more complicated example. This is
+ the required checks for running a Nitrox CN16XX-NHBX in the
+ slot of the EBH5600. This card has a PLX PCIe bridge with
+ four Nitrox PLX parts behind it */
+#if 0
+ /* PLX bridge with 4 ports */
+ if ((bus_number == 4) &&
+ !((devfn >> 3 >= 1) && (devfn >> 3 <= 4)))
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
+ /* Nitrox behind PLX 1 */
+ if ((bus_number == 5) && (devfn >> 3 != 0))
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
+ /* Nitrox behind PLX 2 */
+ if ((bus_number == 6) && (devfn >> 3 != 0))
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
+ /* Nitrox behind PLX 3 */
+ if ((bus_number == 7) && (devfn >> 3 != 0))
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
+ /* Nitrox behind PLX 4 */
+ if ((bus_number == 8) && (devfn >> 3 != 0))
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
+#endif
+
/*
* Shorten the DID timeout so bus errors for PCIe
* config reads from non existent devices happen
@@ -1152,26 +1664,48 @@ static inline int octeon_pcie_read_config(int pcie_port, struct pci_bus *bus,
__write_64bit_c0_register($11, 7, cvmmemctl.u64);
}
- switch (size) {
- case 4:
- *val = cvmx_pcie_config_read32(pcie_port, bus_number,
- devfn >> 3, devfn & 0x7, reg);
+ if ((OCTEON_IS_MODEL(OCTEON_CN63XX)) && (enable_pcie_14459_war))
+ cfg_retry_cnt = disable_cfg_read_retry();
+
+ pr_debug("pcie_cfg_rd port=%d b=%d devfn=0x%03x reg=0x%03x"
+ " size=%d ", pcie_port, bus_number, devfn, reg, size);
+ do {
+ switch (size) {
+ case 4:
+ *val = cvmx_pcie_config_read32(pcie_port, bus_number,
+ devfn >> 3, devfn & 0x7, reg);
break;
- case 2:
- *val = cvmx_pcie_config_read16(pcie_port, bus_number,
- devfn >> 3, devfn & 0x7, reg);
+ case 2:
+ *val = cvmx_pcie_config_read16(pcie_port, bus_number,
+ devfn >> 3, devfn & 0x7, reg);
break;
- case 1:
- *val = cvmx_pcie_config_read8(pcie_port, bus_number, devfn >> 3,
- devfn & 0x7, reg);
+ case 1:
+ *val = cvmx_pcie_config_read8(pcie_port, bus_number,
+ devfn >> 3, devfn & 0x7, reg);
break;
- default:
- return PCIBIOS_FUNC_NOT_SUPPORTED;
- }
+ default:
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX))
+ set_cfg_read_retry(cfg_retry_cnt);
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
+ }
+ if ((OCTEON_IS_MODEL(OCTEON_CN63XX)) &&
+ (enable_pcie_14459_war)) {
+ cfg_retry = is_cfg_retry();
+ retry_cnt++;
+ if (retry_cnt > max_retry_cnt) {
+ pr_err(" pcie cfg_read retries failed. retry_cnt=%d\n",
+ retry_cnt);
+ cfg_retry = 0;
+ }
+ }
+ } while (cfg_retry);
+ if ((OCTEON_IS_MODEL(OCTEON_CN63XX)) && (enable_pcie_14459_war))
+ set_cfg_read_retry(cfg_retry_cnt);
+ pr_debug("val=%08x : tries=%02d\n", *val, retry_cnt);
if (OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1) ||
OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_1))
- __write_64bit_c0_register($11, 7, cvmmemctl_save.u64);
+ write_c0_cvmmemctl(cvmmemctl_save.u64);
return PCIBIOS_SUCCESSFUL;
}
@@ -1187,42 +1721,56 @@ static int octeon_pcie1_read_config(struct pci_bus *bus, unsigned int devfn,
return octeon_pcie_read_config(1, bus, devfn, reg, size, val);
}
+static int octeon_dummy_read_config(struct pci_bus *bus, unsigned int devfn,
+ int reg, int size, u32 *val)
+{
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
+}
-
-/**
+/*
* Write a value to PCI configuration space
- *
- * @bus:
- * @devfn:
- * @reg:
- * @size:
- * @val:
- * Returns
*/
-static inline int octeon_pcie_write_config(int pcie_port, struct pci_bus *bus,
- unsigned int devfn, int reg,
- int size, u32 val)
+static int octeon_pcie_write_config(unsigned int pcie_port, struct pci_bus *bus,
+ unsigned int devfn, int reg,
+ int size, u32 val)
{
int bus_number = bus->number;
+ BUG_ON(pcie_port >= ARRAY_SIZE(enable_pcie_bus_num_war));
+
+ if ((bus->parent == NULL) && (enable_pcie_bus_num_war[pcie_port]))
+ bus_number = 0;
+
+ pr_debug("pcie_cfg_wr port=%d b=%d devfn=0x%03x"
+ " reg=0x%03x size=%d val=%08x\n", pcie_port, bus_number, devfn,
+ reg, size, val);
+
+
switch (size) {
case 4:
cvmx_pcie_config_write32(pcie_port, bus_number, devfn >> 3,
devfn & 0x7, reg, val);
- return PCIBIOS_SUCCESSFUL;
+ break;
case 2:
cvmx_pcie_config_write16(pcie_port, bus_number, devfn >> 3,
devfn & 0x7, reg, val);
- return PCIBIOS_SUCCESSFUL;
+ break;
case 1:
cvmx_pcie_config_write8(pcie_port, bus_number, devfn >> 3,
devfn & 0x7, reg, val);
- return PCIBIOS_SUCCESSFUL;
+ break;
+ default:
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
}
#if PCI_CONFIG_SPACE_DELAY
+ /*
+ * Delay on writes so that devices have time to come up. Some
+ * bridges need this to allow time for the secondary busses to
+ * work
+ */
udelay(PCI_CONFIG_SPACE_DELAY);
#endif
- return PCIBIOS_FUNC_NOT_SUPPORTED;
+ return PCIBIOS_SUCCESSFUL;
}
static int octeon_pcie0_write_config(struct pci_bus *bus, unsigned int devfn,
@@ -1237,6 +1785,12 @@ static int octeon_pcie1_write_config(struct pci_bus *bus, unsigned int devfn,
return octeon_pcie_write_config(1, bus, devfn, reg, size, val);
}
+static int octeon_dummy_write_config(struct pci_bus *bus, unsigned int devfn,
+ int reg, int size, u32 val)
+{
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
+}
+
static struct pci_ops octeon_pcie0_ops = {
octeon_pcie0_read_config,
octeon_pcie0_write_config,
@@ -1279,6 +1833,35 @@ static struct pci_controller octeon_pcie1_controller = {
.io_resource = &octeon_pcie1_io_resource,
};
+static struct pci_ops octeon_dummy_ops = {
+ octeon_dummy_read_config,
+ octeon_dummy_write_config,
+};
+
+static struct resource octeon_dummy_mem_resource = {
+ .name = "Virtual PCIe MEM",
+ .flags = IORESOURCE_MEM,
+};
+
+static struct resource octeon_dummy_io_resource = {
+ .name = "Virtual PCIe IO",
+ .flags = IORESOURCE_IO,
+};
+
+static struct pci_controller octeon_dummy_controller = {
+ .pci_ops = &octeon_dummy_ops,
+ .mem_resource = &octeon_dummy_mem_resource,
+ .io_resource = &octeon_dummy_io_resource,
+};
+
+static int device_needs_bus_num_war(uint32_t deviceid)
+{
+#define IDT_VENDOR_ID 0x111d
+
+ if ((deviceid & 0xffff) == IDT_VENDOR_ID)
+ return 1;
+ return 0;
+}
/**
* Initialize the Octeon PCIe controllers
@@ -1287,19 +1870,27 @@ static struct pci_controller octeon_pcie1_controller = {
*/
static int __init octeon_pcie_setup(void)
{
- union cvmx_npei_ctl_status npei_ctl_status;
int result;
+ int host_mode;
+ int srio_war15205 = 0, port;
+ union cvmx_sli_ctl_portx sli_ctl_portx;
+ union cvmx_sriox_status_reg sriox_status_reg;
/* These chips don't have PCIe */
if (!octeon_has_feature(OCTEON_FEATURE_PCIE))
return 0;
+ /* No PCIe simulation */
+ if (octeon_is_simulation())
+ return 0;
+
+ /* Disable PCI if instructed on the command line */
+ if (pcie_disable)
+ return 0;
+
/* Point pcibios_map_irq() to the PCIe version of it */
octeon_pcibios_map_irq = octeon_pcie_pcibios_map_irq;
- /* Use the PCIe based DMA mappings */
- octeon_dma_bar_type = OCTEON_DMA_BAR_TYPE_PCIE;
-
/*
* PCIe I/O range. It is based on port 0 but includes up until
* port 1's end.
@@ -1310,11 +1901,43 @@ static int __init octeon_pcie_setup(void)
cvmx_pcie_get_io_base_address(1) -
cvmx_pcie_get_io_base_address(0) + cvmx_pcie_get_io_size(1) - 1;
- npei_ctl_status.u64 = cvmx_read_csr(CVMX_PEXP_NPEI_CTL_STATUS);
- if (npei_ctl_status.s.host_mode) {
+ /*
+ * Create a dummy PCIe controller to swallow up bus 0. IDT bridges
+ * don't work if the primary bus number is zero. Here we add a fake
+ * PCIe controller that the kernel will give bus 0. This allows
+ * us to not change the normal kernel bus enumeration
+ */
+ octeon_dummy_controller.io_map_base = -1;
+ octeon_dummy_controller.mem_resource->start = (1ull<<48);
+ octeon_dummy_controller.mem_resource->end = (1ull<<48);
+ register_pci_controller(&octeon_dummy_controller);
+
+ if (octeon_has_feature(OCTEON_FEATURE_NPEI)) {
+ union cvmx_npei_ctl_status npei_ctl_status;
+ npei_ctl_status.u64 = cvmx_read_csr(CVMX_PEXP_NPEI_CTL_STATUS);
+ host_mode = npei_ctl_status.s.host_mode;
+ octeon_dma_bar_type = OCTEON_DMA_BAR_TYPE_PCIE;
+ } else {
+ union cvmx_mio_rst_ctlx mio_rst_ctl;
+ mio_rst_ctl.u64 = cvmx_read_csr(CVMX_MIO_RST_CTLX(0));
+ host_mode = mio_rst_ctl.s.host_mode;
+ octeon_dma_bar_type = OCTEON_DMA_BAR_TYPE_PCIE2;
+ }
+
+ if (host_mode) {
pr_notice("PCIe: Initializing port 0\n");
+ /* CN63XX pass 1_x/2.0 errata PCIe-15205 */
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_X) ||
+ OCTEON_IS_MODEL(OCTEON_CN63XX_PASS2_0)) {
+ sriox_status_reg.u64 = cvmx_read_csr(CVMX_SRIOX_STATUS_REG(0));
+ if (sriox_status_reg.s.srio) {
+ srio_war15205 += 1; /* Port is SRIO */
+ port = 0;
+ }
+ }
result = cvmx_pcie_rc_initialize(0);
if (result == 0) {
+ uint32_t device0;
/* Memory offsets are physical addresses */
octeon_pcie0_controller.mem_offset =
cvmx_pcie_get_mem_base_address(0);
@@ -1343,60 +1966,134 @@ static int __init octeon_pcie_setup(void)
octeon_pcie0_controller.io_resource->start = 4 << 10;
octeon_pcie0_controller.io_resource->end =
cvmx_pcie_get_io_size(0) - 1;
+ msleep(100); /* Some devices need extra time */
register_pci_controller(&octeon_pcie0_controller);
+ device0 = cvmx_pcie_config_read32(0, 0, 0, 0, 0);
+ enable_pcie_bus_num_war[0] =
+ device_needs_bus_num_war(device0);
}
} else {
pr_notice("PCIe: Port 0 in endpoint mode, skipping.\n");
+ /* CN63XX pass 1_x/2.0 errata PCIe-15205 */
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_X) ||
+ OCTEON_IS_MODEL(OCTEON_CN63XX_PASS2_0)) {
+ srio_war15205 += 1;
+ port = 0;
+ }
}
- /* Skip the 2nd port on CN52XX if port 0 is in 4 lane mode */
- if (OCTEON_IS_MODEL(OCTEON_CN52XX)) {
- union cvmx_npei_dbg_data npei_dbg_data;
- npei_dbg_data.u64 = cvmx_read_csr(CVMX_PEXP_NPEI_DBG_DATA);
- if (npei_dbg_data.cn52xx.qlm0_link_width)
- return 0;
+ if (octeon_has_feature(OCTEON_FEATURE_NPEI)) {
+ host_mode = 1;
+ /* Skip the 2nd port on CN52XX if port 0 is in 4 lane mode */
+ if (OCTEON_IS_MODEL(OCTEON_CN52XX)) {
+ union cvmx_npei_dbg_data dbg_data;
+ dbg_data.u64 = cvmx_read_csr(CVMX_PEXP_NPEI_DBG_DATA);
+ if (dbg_data.cn52xx.qlm0_link_width)
+ host_mode = 0;
+ }
+ } else {
+ union cvmx_mio_rst_ctlx mio_rst_ctl;
+ mio_rst_ctl.u64 = cvmx_read_csr(CVMX_MIO_RST_CTLX(1));
+ host_mode = mio_rst_ctl.s.host_mode;
}
- pr_notice("PCIe: Initializing port 1\n");
- result = cvmx_pcie_rc_initialize(1);
- if (result == 0) {
- /* Memory offsets are physical addresses */
- octeon_pcie1_controller.mem_offset =
- cvmx_pcie_get_mem_base_address(1);
- /* IO offsets are Mips virtual addresses */
- octeon_pcie1_controller.io_map_base =
- CVMX_ADD_IO_SEG(cvmx_pcie_get_io_base_address(1));
- octeon_pcie1_controller.io_offset =
- cvmx_pcie_get_io_base_address(1) -
- cvmx_pcie_get_io_base_address(0);
- /*
- * To keep things similar to PCI, we start device
- * addresses at the same place as PCI uisng big bar
- * support. This normally translates to 4GB-256MB,
- * which is the same as most x86 PCs.
- */
- octeon_pcie1_controller.mem_resource->start =
- cvmx_pcie_get_mem_base_address(1) + (4ul << 30) -
- (OCTEON_PCI_BAR1_HOLE_SIZE << 20);
- octeon_pcie1_controller.mem_resource->end =
- cvmx_pcie_get_mem_base_address(1) +
- cvmx_pcie_get_mem_size(1) - 1;
- /*
- * Ports must be above 16KB for the ISA bus filtering
- * in the PCI-X to PCI bridge.
- */
- octeon_pcie1_controller.io_resource->start =
- cvmx_pcie_get_io_base_address(1) -
- cvmx_pcie_get_io_base_address(0);
- octeon_pcie1_controller.io_resource->end =
- octeon_pcie1_controller.io_resource->start +
- cvmx_pcie_get_io_size(1) - 1;
- register_pci_controller(&octeon_pcie1_controller);
+ if (host_mode) {
+ pr_notice("PCIe: Initializing port 1\n");
+ /* CN63XX pass 1_x/2.0 errata PCIe-15205 */
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_X) ||
+ OCTEON_IS_MODEL(OCTEON_CN63XX_PASS2_0)) {
+ sriox_status_reg.u64 = cvmx_read_csr(CVMX_SRIOX_STATUS_REG(1));
+ if (sriox_status_reg.s.srio) {
+ srio_war15205 += 1; /* Port is SRIO */
+ port = 1;
+ }
+ }
+ result = cvmx_pcie_rc_initialize(1);
+ if (result == 0) {
+ uint32_t device0;
+ /* Memory offsets are physical addresses */
+ octeon_pcie1_controller.mem_offset =
+ cvmx_pcie_get_mem_base_address(1);
+ /*
+ * To calculate the address for accessing the 2nd PCIe device,
+ * either 'io_map_base' (pci_iomap()), or 'mips_io_port_base'
+ * (ioport_map()) value is added to
+ * pci_resource_start(dev,bar)). The 'mips_io_port_base' is set
+ * only once based on first PCIe. Also changing 'io_map_base'
+ * based on first slot's value so that both the routines will
+ * work properly.
+ */
+ octeon_pcie1_controller.io_map_base =
+ CVMX_ADD_IO_SEG(cvmx_pcie_get_io_base_address(0));
+ /* IO offsets are Mips virtual addresses */
+ octeon_pcie1_controller.io_offset =
+ cvmx_pcie_get_io_base_address(1) -
+ cvmx_pcie_get_io_base_address(0);
+ /*
+ * To keep things similar to PCI, we start device
+ * addresses at the same place as PCI uisng big bar
+ * support. This normally translates to 4GB-256MB,
+ * which is the same as most x86 PCs.
+ */
+ octeon_pcie1_controller.mem_resource->start =
+ cvmx_pcie_get_mem_base_address(1) + (4ul << 30) -
+ (OCTEON_PCI_BAR1_HOLE_SIZE << 20);
+ octeon_pcie1_controller.mem_resource->end =
+ cvmx_pcie_get_mem_base_address(1) +
+ cvmx_pcie_get_mem_size(1) - 1;
+ /*
+ * Ports must be above 16KB for the ISA bus filtering
+ * in the PCI-X to PCI bridge.
+ */
+ octeon_pcie1_controller.io_resource->start =
+ cvmx_pcie_get_io_base_address(1) -
+ cvmx_pcie_get_io_base_address(0);
+ octeon_pcie1_controller.io_resource->end =
+ octeon_pcie1_controller.io_resource->start +
+ cvmx_pcie_get_io_size(1) - 1;
+ msleep(100); /* Some devices need extra time */
+ register_pci_controller(&octeon_pcie1_controller);
+ device0 = cvmx_pcie_config_read32(1, 0, 0, 0, 0);
+ enable_pcie_bus_num_war[1] =
+ device_needs_bus_num_war(device0);
+ }
+ } else {
+ pr_notice("PCIe: Port 1 not in root complex mode, skipping.\n");
+ /* CN63XX pass 1_x/2.0 errata PCIe-15205 */
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_X) ||
+ OCTEON_IS_MODEL(OCTEON_CN63XX_PASS2_0)) {
+ srio_war15205 += 1;
+ port = 1;
+ }
+ }
+
+ /*
+ * CN63XX pass 1_x/2.0 errata PCIe-15205 requires setting all
+ * of SRIO MACs SLI_CTL_PORT*[INT*_MAP] to similar value and
+ * all of PCIe Macs SLI_CTL_PORT*[INT*_MAP] to different value
+ * from the previous set values
+ */
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_X) ||
+ OCTEON_IS_MODEL(OCTEON_CN63XX_PASS2_0)) {
+ if (srio_war15205 == 1) {
+ sli_ctl_portx.u64 = cvmx_read_csr(CVMX_PEXP_SLI_CTL_PORTX(port));
+ sli_ctl_portx.s.inta_map = 1;
+ sli_ctl_portx.s.intb_map = 1;
+ sli_ctl_portx.s.intc_map = 1;
+ sli_ctl_portx.s.intd_map = 1;
+ cvmx_write_csr(CVMX_PEXP_SLI_CTL_PORTX(port), sli_ctl_portx.u64);
+
+ sli_ctl_portx.u64 = cvmx_read_csr(CVMX_PEXP_SLI_CTL_PORTX(!port));
+ sli_ctl_portx.s.inta_map = 0;
+ sli_ctl_portx.s.intb_map = 0;
+ sli_ctl_portx.s.intc_map = 0;
+ sli_ctl_portx.s.intd_map = 0;
+ cvmx_write_csr(CVMX_PEXP_SLI_CTL_PORTX(!port), sli_ctl_portx.u64);
+ }
}
octeon_pci_dma_init();
return 0;
}
-
arch_initcall(octeon_pcie_setup);
--
1.7.2.3
