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@@ -0,0 +1,1370 @@
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+/*
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+ * This file is subject to the terms and conditions of the GNU General Public
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+ * License. See the file "COPYING" in the main directory of this archive
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+ * for more details.
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+ *
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+ * Copyright (C) 2007, 2008 Cavium Networks
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+ */
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+#include <linux/kernel.h>
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+#include <linux/init.h>
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+#include <linux/pci.h>
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+#include <linux/interrupt.h>
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+#include <linux/time.h>
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+#include <linux/delay.h>
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+
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+#include <asm/octeon/octeon.h>
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+#include <asm/octeon/cvmx-npei-defs.h>
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+#include <asm/octeon/cvmx-pciercx-defs.h>
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+#include <asm/octeon/cvmx-pescx-defs.h>
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+#include <asm/octeon/cvmx-pexp-defs.h>
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+#include <asm/octeon/cvmx-helper-errata.h>
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+
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+#include "pci-common.h"
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+
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+union cvmx_pcie_address {
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+ uint64_t u64;
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+ struct {
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+ uint64_t upper:2; /* Normally 2 for XKPHYS */
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+ uint64_t reserved_49_61:13; /* Must be zero */
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+ uint64_t io:1; /* 1 for IO space access */
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+ uint64_t did:5; /* PCIe DID = 3 */
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+ uint64_t subdid:3; /* PCIe SubDID = 1 */
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+ uint64_t reserved_36_39:4; /* Must be zero */
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+ uint64_t es:2; /* Endian swap = 1 */
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+ uint64_t port:2; /* PCIe port 0,1 */
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+ uint64_t reserved_29_31:3; /* Must be zero */
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+ /*
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+ * Selects the type of the configuration request (0 = type 0,
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+ * 1 = type 1).
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+ */
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+ uint64_t ty:1;
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+ /* Target bus number sent in the ID in the request. */
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+ uint64_t bus:8;
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+ /*
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+ * Target device number sent in the ID in the
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+ * request. Note that Dev must be zero for type 0
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+ * configuration requests.
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+ */
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+ uint64_t dev:5;
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+ /* Target function number sent in the ID in the request. */
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+ uint64_t func:3;
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+ /*
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+ * Selects a register in the configuration space of
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+ * the target.
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+ */
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+ uint64_t reg:12;
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+ } config;
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+ struct {
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+ uint64_t upper:2; /* Normally 2 for XKPHYS */
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+ uint64_t reserved_49_61:13; /* Must be zero */
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+ uint64_t io:1; /* 1 for IO space access */
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+ uint64_t did:5; /* PCIe DID = 3 */
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+ uint64_t subdid:3; /* PCIe SubDID = 2 */
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+ uint64_t reserved_36_39:4; /* Must be zero */
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+ uint64_t es:2; /* Endian swap = 1 */
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+ uint64_t port:2; /* PCIe port 0,1 */
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+ uint64_t address:32; /* PCIe IO address */
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+ } io;
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+ struct {
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+ uint64_t upper:2; /* Normally 2 for XKPHYS */
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+ uint64_t reserved_49_61:13; /* Must be zero */
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+ uint64_t io:1; /* 1 for IO space access */
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+ uint64_t did:5; /* PCIe DID = 3 */
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+ uint64_t subdid:3; /* PCIe SubDID = 3-6 */
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+ uint64_t reserved_36_39:4; /* Must be zero */
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+ uint64_t address:36; /* PCIe Mem address */
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+ } mem;
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+};
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+
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+/**
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+ * Return the Core virtual base address for PCIe IO access. IOs are
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+ * read/written as an offset from this address.
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+ *
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+ * @pcie_port: PCIe port the IO is for
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+ *
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+ * Returns 64bit Octeon IO base address for read/write
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+ */
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+static inline uint64_t cvmx_pcie_get_io_base_address(int pcie_port)
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+{
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+ union cvmx_pcie_address pcie_addr;
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+ pcie_addr.u64 = 0;
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+ pcie_addr.io.upper = 0;
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+ pcie_addr.io.io = 1;
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+ pcie_addr.io.did = 3;
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+ pcie_addr.io.subdid = 2;
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+ pcie_addr.io.es = 1;
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+ pcie_addr.io.port = pcie_port;
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+ return pcie_addr.u64;
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+}
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+
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+/**
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+ * Size of the IO address region returned at address
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+ * cvmx_pcie_get_io_base_address()
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+ *
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+ * @pcie_port: PCIe port the IO is for
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+ *
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+ * Returns Size of the IO window
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+ */
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+static inline uint64_t cvmx_pcie_get_io_size(int pcie_port)
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+{
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+ return 1ull << 32;
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+}
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+
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+/**
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+ * Return the Core virtual base address for PCIe MEM access. Memory is
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+ * read/written as an offset from this address.
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+ *
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+ * @pcie_port: PCIe port the IO is for
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+ *
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+ * Returns 64bit Octeon IO base address for read/write
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+ */
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+static inline uint64_t cvmx_pcie_get_mem_base_address(int pcie_port)
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+{
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+ union cvmx_pcie_address pcie_addr;
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+ pcie_addr.u64 = 0;
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+ pcie_addr.mem.upper = 0;
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+ pcie_addr.mem.io = 1;
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+ pcie_addr.mem.did = 3;
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+ pcie_addr.mem.subdid = 3 + pcie_port;
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+ return pcie_addr.u64;
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+}
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+
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+/**
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+ * Size of the Mem address region returned at address
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+ * cvmx_pcie_get_mem_base_address()
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+ *
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+ * @pcie_port: PCIe port the IO is for
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+ *
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+ * Returns Size of the Mem window
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+ */
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+static inline uint64_t cvmx_pcie_get_mem_size(int pcie_port)
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+{
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+ return 1ull << 36;
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+}
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+
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+/**
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+ * Read a PCIe config space register indirectly. This is used for
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+ * registers of the form PCIEEP_CFG??? and PCIERC?_CFG???.
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+ *
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+ * @pcie_port: PCIe port to read from
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+ * @cfg_offset: Address to read
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+ *
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+ * Returns Value read
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+ */
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+static uint32_t cvmx_pcie_cfgx_read(int pcie_port, uint32_t cfg_offset)
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+{
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+ union cvmx_pescx_cfg_rd pescx_cfg_rd;
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+ pescx_cfg_rd.u64 = 0;
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+ pescx_cfg_rd.s.addr = cfg_offset;
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+ cvmx_write_csr(CVMX_PESCX_CFG_RD(pcie_port), pescx_cfg_rd.u64);
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+ pescx_cfg_rd.u64 = cvmx_read_csr(CVMX_PESCX_CFG_RD(pcie_port));
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+ return pescx_cfg_rd.s.data;
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+}
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+
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+/**
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+ * Write a PCIe config space register indirectly. This is used for
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+ * registers of the form PCIEEP_CFG??? and PCIERC?_CFG???.
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+ *
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+ * @pcie_port: PCIe port to write to
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+ * @cfg_offset: Address to write
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+ * @val: Value to write
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+ */
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+static void cvmx_pcie_cfgx_write(int pcie_port, uint32_t cfg_offset,
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+ uint32_t val)
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+{
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+ union cvmx_pescx_cfg_wr pescx_cfg_wr;
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+ pescx_cfg_wr.u64 = 0;
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+ pescx_cfg_wr.s.addr = cfg_offset;
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+ pescx_cfg_wr.s.data = val;
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+ cvmx_write_csr(CVMX_PESCX_CFG_WR(pcie_port), pescx_cfg_wr.u64);
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+}
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+
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+/**
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+ * Build a PCIe config space request address for a device
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+ *
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+ * @pcie_port: PCIe port to access
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+ * @bus: Sub bus
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+ * @dev: Device ID
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+ * @fn: Device sub function
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+ * @reg: Register to access
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+ *
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+ * Returns 64bit Octeon IO address
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+ */
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+static inline uint64_t __cvmx_pcie_build_config_addr(int pcie_port, int bus,
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+ int dev, int fn, int reg)
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+{
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+ union cvmx_pcie_address pcie_addr;
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+ union cvmx_pciercx_cfg006 pciercx_cfg006;
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+
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+ pciercx_cfg006.u32 =
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+ cvmx_pcie_cfgx_read(pcie_port, CVMX_PCIERCX_CFG006(pcie_port));
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+ if ((bus <= pciercx_cfg006.s.pbnum) && (dev != 0))
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+ return 0;
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+
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+ pcie_addr.u64 = 0;
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+ pcie_addr.config.upper = 2;
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+ pcie_addr.config.io = 1;
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+ pcie_addr.config.did = 3;
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+ pcie_addr.config.subdid = 1;
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+ pcie_addr.config.es = 1;
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+ pcie_addr.config.port = pcie_port;
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+ pcie_addr.config.ty = (bus > pciercx_cfg006.s.pbnum);
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+ pcie_addr.config.bus = bus;
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+ pcie_addr.config.dev = dev;
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+ pcie_addr.config.func = fn;
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+ pcie_addr.config.reg = reg;
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+ return pcie_addr.u64;
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+}
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+
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+/**
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+ * Read 8bits from a Device's config space
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+ *
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+ * @pcie_port: PCIe port the device is on
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+ * @bus: Sub bus
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+ * @dev: Device ID
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+ * @fn: Device sub function
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+ * @reg: Register to access
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+ *
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+ * Returns Result of the read
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+ */
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+static uint8_t cvmx_pcie_config_read8(int pcie_port, int bus, int dev,
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+ int fn, int reg)
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+{
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+ uint64_t address =
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+ __cvmx_pcie_build_config_addr(pcie_port, bus, dev, fn, reg);
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+ if (address)
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+ return cvmx_read64_uint8(address);
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+ else
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+ return 0xff;
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+}
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+
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+/**
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+ * Read 16bits from a Device's config space
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+ *
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+ * @pcie_port: PCIe port the device is on
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+ * @bus: Sub bus
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+ * @dev: Device ID
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+ * @fn: Device sub function
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+ * @reg: Register to access
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+ *
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+ * Returns Result of the read
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+ */
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+static uint16_t cvmx_pcie_config_read16(int pcie_port, int bus, int dev,
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+ int fn, int reg)
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+{
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+ uint64_t address =
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+ __cvmx_pcie_build_config_addr(pcie_port, bus, dev, fn, reg);
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+ if (address)
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+ return le16_to_cpu(cvmx_read64_uint16(address));
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+ else
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+ return 0xffff;
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+}
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+
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+/**
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+ * Read 32bits from a Device's config space
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+ *
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+ * @pcie_port: PCIe port the device is on
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+ * @bus: Sub bus
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+ * @dev: Device ID
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+ * @fn: Device sub function
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+ * @reg: Register to access
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+ *
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+ * Returns Result of the read
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+ */
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+static uint32_t cvmx_pcie_config_read32(int pcie_port, int bus, int dev,
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+ int fn, int reg)
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+{
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+ uint64_t address =
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+ __cvmx_pcie_build_config_addr(pcie_port, bus, dev, fn, reg);
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+ if (address)
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+ return le32_to_cpu(cvmx_read64_uint32(address));
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+ else
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+ return 0xffffffff;
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+}
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+
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+/**
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+ * Write 8bits to a Device's config space
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+ *
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+ * @pcie_port: PCIe port the device is on
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+ * @bus: Sub bus
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+ * @dev: Device ID
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+ * @fn: Device sub function
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+ * @reg: Register to access
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+ * @val: Value to write
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+ */
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+static void cvmx_pcie_config_write8(int pcie_port, int bus, int dev, int fn,
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+ int reg, uint8_t val)
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+{
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+ uint64_t address =
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+ __cvmx_pcie_build_config_addr(pcie_port, bus, dev, fn, reg);
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+ if (address)
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+ cvmx_write64_uint8(address, val);
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+}
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+
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+/**
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+ * Write 16bits to a Device's config space
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+ *
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+ * @pcie_port: PCIe port the device is on
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+ * @bus: Sub bus
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+ * @dev: Device ID
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+ * @fn: Device sub function
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+ * @reg: Register to access
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+ * @val: Value to write
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+ */
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+static void cvmx_pcie_config_write16(int pcie_port, int bus, int dev, int fn,
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+ int reg, uint16_t val)
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+{
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+ uint64_t address =
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+ __cvmx_pcie_build_config_addr(pcie_port, bus, dev, fn, reg);
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+ if (address)
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+ cvmx_write64_uint16(address, cpu_to_le16(val));
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+}
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+
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+/**
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+ * Write 32bits to a Device's config space
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+ *
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+ * @pcie_port: PCIe port the device is on
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+ * @bus: Sub bus
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+ * @dev: Device ID
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+ * @fn: Device sub function
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+ * @reg: Register to access
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+ * @val: Value to write
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+ */
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+static void cvmx_pcie_config_write32(int pcie_port, int bus, int dev, int fn,
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+ int reg, uint32_t val)
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+{
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+ uint64_t address =
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+ __cvmx_pcie_build_config_addr(pcie_port, bus, dev, fn, reg);
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+ if (address)
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+ cvmx_write64_uint32(address, cpu_to_le32(val));
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+}
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+
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+/**
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+ * Initialize the RC config space CSRs
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+ *
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+ * @pcie_port: PCIe port to initialize
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+ */
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+static void __cvmx_pcie_rc_initialize_config_space(int pcie_port)
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+{
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+ union cvmx_pciercx_cfg030 pciercx_cfg030;
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+ union cvmx_npei_ctl_status2 npei_ctl_status2;
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+ union cvmx_pciercx_cfg070 pciercx_cfg070;
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+ union cvmx_pciercx_cfg001 pciercx_cfg001;
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+ union cvmx_pciercx_cfg032 pciercx_cfg032;
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+ union cvmx_pciercx_cfg006 pciercx_cfg006;
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+ union cvmx_pciercx_cfg008 pciercx_cfg008;
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+ union cvmx_pciercx_cfg009 pciercx_cfg009;
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+ union cvmx_pciercx_cfg010 pciercx_cfg010;
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+ union cvmx_pciercx_cfg011 pciercx_cfg011;
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+ union cvmx_pciercx_cfg035 pciercx_cfg035;
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+ union cvmx_pciercx_cfg075 pciercx_cfg075;
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+ union cvmx_pciercx_cfg034 pciercx_cfg034;
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+
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+ /* Max Payload Size (PCIE*_CFG030[MPS]) */
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+ /* Max Read Request Size (PCIE*_CFG030[MRRS]) */
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+ /* Relaxed-order, no-snoop enables (PCIE*_CFG030[RO_EN,NS_EN] */
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+ /* Error Message Enables (PCIE*_CFG030[CE_EN,NFE_EN,FE_EN,UR_EN]) */
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+ pciercx_cfg030.u32 =
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+ cvmx_pcie_cfgx_read(pcie_port, CVMX_PCIERCX_CFG030(pcie_port));
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+ /*
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+ * Max payload size = 128 bytes for best Octeon DMA
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+ * performance.
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+ */
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+ pciercx_cfg030.s.mps = 0;
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+ /*
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+ * Max read request size = 128 bytes for best Octeon DMA
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+ * performance.
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+ */
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+ pciercx_cfg030.s.mrrs = 0;
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+ /* Enable relaxed ordering. */
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+ pciercx_cfg030.s.ro_en = 1;
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+ /* Enable no snoop. */
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+ pciercx_cfg030.s.ns_en = 1;
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+ /* Correctable error reporting enable. */
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+ 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 (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;
|
|
|
+ cvmx_write_csr(CVMX_PEXP_NPEI_CTL_STATUS2, npei_ctl_status2.u64);
|
|
|
+
|
|
|
+ /* ECRC Generation (PCIE*_CFG070[GE,CE]) */
|
|
|
+ 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])
|
|
|
+ */
|
|
|
+ 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]) */
|
|
|
+ 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]) */
|
|
|
+
|
|
|
+ /*
|
|
|
+ * 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.
|
|
|
+ */
|
|
|
+ pciercx_cfg006.u32 = 0;
|
|
|
+ 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);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * 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]
|
|
|
+ */
|
|
|
+ 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]
|
|
|
+ */
|
|
|
+ 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])
|
|
|
+ */
|
|
|
+ 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);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * 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);
|
|
|
+
|
|
|
+ /* 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);
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * Initialize a host mode PCIe 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
|
|
|
+ *
|
|
|
+ * Returns Zero on success
|
|
|
+ */
|
|
|
+static int __cvmx_pcie_rc_initialize_link(int pcie_port)
|
|
|
+{
|
|
|
+ uint64_t start_cycle;
|
|
|
+ union cvmx_pescx_ctl_status pescx_ctl_status;
|
|
|
+ union cvmx_pciercx_cfg452 pciercx_cfg452;
|
|
|
+ union cvmx_pciercx_cfg032 pciercx_cfg032;
|
|
|
+ union cvmx_pciercx_cfg448 pciercx_cfg448;
|
|
|
+
|
|
|
+ /* Set the lane width */
|
|
|
+ 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) {
|
|
|
+ /* We're in 8 lane (56XX) or 4 lane (54XX) mode */
|
|
|
+ pciercx_cfg452.s.lme = 0xf;
|
|
|
+ } 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);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * CN52XX pass 1.x has an errata where length mismatches on UR
|
|
|
+ * responses can cause bus errors on 64bit memory
|
|
|
+ * reads. Turning off length error checking fixes this.
|
|
|
+ */
|
|
|
+ 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.s.m_cpl_len_err = 1;
|
|
|
+ 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);
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Bring up the link */
|
|
|
+ pescx_ctl_status.u64 = cvmx_read_csr(CVMX_PESCX_CTL_STATUS(pcie_port));
|
|
|
+ pescx_ctl_status.s.lnk_enb = 1;
|
|
|
+ cvmx_write_csr(CVMX_PESCX_CTL_STATUS(pcie_port), pescx_ctl_status.u64);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * CN52XX pass 1.0: Due to a bug in 2nd order CDR, it needs to
|
|
|
+ * be disabled.
|
|
|
+ */
|
|
|
+ if (OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_0))
|
|
|
+ __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);
|
|
|
+ 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);
|
|
|
+
|
|
|
+ /* Display the link status */
|
|
|
+ cvmx_dprintf("PCIe: Port %d link active, %d lanes\n", pcie_port,
|
|
|
+ pciercx_cfg032.s.nlw);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * 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 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 i;
|
|
|
+ union cvmx_ciu_soft_prst ciu_soft_prst;
|
|
|
+ union cvmx_pescx_bist_status pescx_bist_status;
|
|
|
+ union cvmx_pescx_bist_status2 pescx_bist_status2;
|
|
|
+ union cvmx_npei_ctl_status npei_ctl_status;
|
|
|
+ union cvmx_npei_mem_access_ctl npei_mem_access_ctl;
|
|
|
+ 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;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * 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");
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Make sure a CN52XX isn't trying to bring up port 1 when it
|
|
|
+ * is disabled.
|
|
|
+ */
|
|
|
+ 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");
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ * PCIe switch arbitration mode. '0' == fixed priority NPEI,
|
|
|
+ * PCIe0, then PCIe1. '1' == round robin.
|
|
|
+ */
|
|
|
+ npei_ctl_status.s.arb = 1;
|
|
|
+ /* Allow up to 0x20 config retries */
|
|
|
+ npei_ctl_status.s.cfg_rtry = 0x20;
|
|
|
+ /*
|
|
|
+ * CN52XX pass1.x has an errata where P0_NTAGS and P1_NTAGS
|
|
|
+ * don't reset.
|
|
|
+ */
|
|
|
+ if (OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X)) {
|
|
|
+ npei_ctl_status.s.p0_ntags = 0x20;
|
|
|
+ npei_ctl_status.s.p1_ntags = 0x20;
|
|
|
+ }
|
|
|
+ cvmx_write_csr(CVMX_PEXP_NPEI_CTL_STATUS, npei_ctl_status.u64);
|
|
|
+
|
|
|
+ /* Bring the PCIe out of reset */
|
|
|
+ if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_EBH5200) {
|
|
|
+ /*
|
|
|
+ * The EBH5200 board swapped the PCIe reset lines on
|
|
|
+ * 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.
|
|
|
+ */
|
|
|
+ if (pcie_port == 0) {
|
|
|
+ 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 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);
|
|
|
+ ciu_soft_prst.s.soft_prst = 1;
|
|
|
+ cvmx_write_csr(CVMX_CIU_SOFT_PRST1,
|
|
|
+ ciu_soft_prst.u64);
|
|
|
+ /* Wait until pcie resets the ports. */
|
|
|
+ udelay(2000);
|
|
|
+ }
|
|
|
+ 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);
|
|
|
+ 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);
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ /*
|
|
|
+ * The normal case: The PCIe ports are completely
|
|
|
+ * separate and can be brought out of reset
|
|
|
+ * independently.
|
|
|
+ */
|
|
|
+ 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. Due to errata PCIE-700, we
|
|
|
+ * don't poll PESCX_CTL_STATUS2[PCIERST], but simply wait a
|
|
|
+ * fixed number of cycles.
|
|
|
+ */
|
|
|
+ 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)) {
|
|
|
+ /* 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.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.
|
|
|
+ */
|
|
|
+ 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);
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ * 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.
|
|
|
+ */
|
|
|
+ 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);
|
|
|
+ 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.
|
|
|
+ */
|
|
|
+ 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",
|
|
|
+ pcie_port);
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Check BIST status */
|
|
|
+ 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));
|
|
|
+
|
|
|
+ /* Initialize the config space CSRs */
|
|
|
+ __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");
|
|
|
+ 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;
|
|
|
+ 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 Adddress Bits <63:34>. */
|
|
|
+ mem_access_subid.s.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_NPEI_MEM_ACCESS_SUBIDX(i),
|
|
|
+ mem_access_subid.u64);
|
|
|
+ /* Set each SUBID to extend the addressable range */
|
|
|
+ mem_access_subid.s.ba += 1;
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ * 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_PESCX_P2P_BARX_START(i, pcie_port), -1);
|
|
|
+ cvmx_write_csr(CVMX_PESCX_P2P_BARX_END(i, pcie_port), -1);
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Set Octeon's BAR0 to decode 0-16KB. It overlaps with Bar2 */
|
|
|
+ cvmx_write_csr(CVMX_PESCX_P2N_BAR0_START(pcie_port), 0);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Disable Octeon's BAR1. It isn't needed in RC mode since
|
|
|
+ * BAR2 maps all of memory. BAR2 also maps 256MB-512MB into
|
|
|
+ * the 2nd 256MB of memory.
|
|
|
+ */
|
|
|
+ cvmx_write_csr(CVMX_PESCX_P2N_BAR1_START(pcie_port), -1);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Set Octeon's BAR2 to decode 0-2^39. 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_PESCX_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]).
|
|
|
+ */
|
|
|
+ if (pcie_port) {
|
|
|
+ union cvmx_npei_ctl_port1 npei_ctl_port;
|
|
|
+ npei_ctl_port.u64 = cvmx_read_csr(CVMX_PEXP_NPEI_CTL_PORT1);
|
|
|
+ npei_ctl_port.s.bar2_enb = 1;
|
|
|
+ npei_ctl_port.s.bar2_esx = 1;
|
|
|
+ npei_ctl_port.s.bar2_cax = 0;
|
|
|
+ npei_ctl_port.s.ptlp_ro = 1;
|
|
|
+ npei_ctl_port.s.ctlp_ro = 1;
|
|
|
+ npei_ctl_port.s.wait_com = 0;
|
|
|
+ npei_ctl_port.s.waitl_com = 0;
|
|
|
+ cvmx_write_csr(CVMX_PEXP_NPEI_CTL_PORT1, npei_ctl_port.u64);
|
|
|
+ } else {
|
|
|
+ union cvmx_npei_ctl_port0 npei_ctl_port;
|
|
|
+ npei_ctl_port.u64 = cvmx_read_csr(CVMX_PEXP_NPEI_CTL_PORT0);
|
|
|
+ npei_ctl_port.s.bar2_enb = 1;
|
|
|
+ npei_ctl_port.s.bar2_esx = 1;
|
|
|
+ npei_ctl_port.s.bar2_cax = 0;
|
|
|
+ npei_ctl_port.s.ptlp_ro = 1;
|
|
|
+ npei_ctl_port.s.ctlp_ro = 1;
|
|
|
+ npei_ctl_port.s.wait_com = 0;
|
|
|
+ npei_ctl_port.s.waitl_com = 0;
|
|
|
+ cvmx_write_csr(CVMX_PEXP_NPEI_CTL_PORT0, npei_ctl_port.u64);
|
|
|
+ }
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+/* Above was cvmx-pcie.c, below original pcie.c */
|
|
|
+
|
|
|
+
|
|
|
+/**
|
|
|
+ * Map a PCI device to the appropriate interrupt line
|
|
|
+ *
|
|
|
+ * @param dev The Linux PCI device structure for the device to map
|
|
|
+ * @param slot The slot number for this device on __BUS 0__. Linux
|
|
|
+ * enumerates through all the bridges and figures out the
|
|
|
+ * slot on Bus 0 where this device eventually hooks to.
|
|
|
+ * @param pin The PCI interrupt pin read from the device, then swizzled
|
|
|
+ * as it goes through each bridge.
|
|
|
+ * @return Interrupt number for the device
|
|
|
+ */
|
|
|
+int __init octeon_pcie_pcibios_map_irq(const struct pci_dev *dev,
|
|
|
+ u8 slot, u8 pin)
|
|
|
+{
|
|
|
+ /*
|
|
|
+ * The EBH5600 board with the PCI to PCIe bridge mistakenly
|
|
|
+ * wires the first slot for both device id 2 and interrupt
|
|
|
+ * A. According to the PCI spec, device id 2 should be C. The
|
|
|
+ * following kludge attempts to fix this.
|
|
|
+ */
|
|
|
+ if (strstr(octeon_board_type_string(), "EBH5600") &&
|
|
|
+ dev->bus && dev->bus->parent) {
|
|
|
+ /*
|
|
|
+ * Iterate all the way up the device chain and find
|
|
|
+ * the root bus.
|
|
|
+ */
|
|
|
+ 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
|
|
|
+ * root, assume we are behind the miswired bus. We
|
|
|
+ * need to correct the swizzle level by two. Yuck.
|
|
|
+ */
|
|
|
+ if ((dev->bus->number == 0) &&
|
|
|
+ (dev->vendor == 0x10b5) && (dev->device == 0x8114)) {
|
|
|
+ /*
|
|
|
+ * The pin field is one based, not zero. We
|
|
|
+ * need to swizzle it by minus two.
|
|
|
+ */
|
|
|
+ pin = ((pin - 3) & 3) + 1;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ /*
|
|
|
+ * The -1 is because pin starts with one, not zero. It might
|
|
|
+ * be that this equation needs to include the slot number, but
|
|
|
+ * I don't have hardware to check that against.
|
|
|
+ */
|
|
|
+ return pin - 1 + OCTEON_IRQ_PCI_INT0;
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ * Read a value from configuration space
|
|
|
+ *
|
|
|
+ * @param bus
|
|
|
+ * @param devfn
|
|
|
+ * @param reg
|
|
|
+ * @param size
|
|
|
+ * @param val
|
|
|
+ * @return
|
|
|
+ */
|
|
|
+static inline int octeon_pcie_read_config(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;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * We need to force the bus number to be zero on the root
|
|
|
+ * bus. Linux numbers the 2nd root bus to start after all
|
|
|
+ * buses on root 0.
|
|
|
+ */
|
|
|
+ if (bus->parent == NULL)
|
|
|
+ bus_number = 0;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * PCIe only has a single device connected to Octeon. It is
|
|
|
+ * always device ID 0. Don't bother doing reads for other
|
|
|
+ * device IDs on the first segment.
|
|
|
+ */
|
|
|
+ if ((bus_number == 0) && (devfn >> 3 != 0))
|
|
|
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
|
|
|
+
|
|
|
+ /*
|
|
|
+ * The following is a workaround for the CN57XX, CN56XX,
|
|
|
+ * CN55XX, and CN54XX errata with PCIe config reads from non
|
|
|
+ * existent devices. These chips will hang the PCIe link if a
|
|
|
+ * config read is performed that causes a UR response.
|
|
|
+ */
|
|
|
+ if (OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1) ||
|
|
|
+ OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_1)) {
|
|
|
+ /*
|
|
|
+ * For our EBH5600 board, port 0 has a bridge with two
|
|
|
+ * PCI-X slots. We need a new special checks to make
|
|
|
+ * sure we only probe valid stuff. The PCIe->PCI-X
|
|
|
+ * bridge only respondes to device ID 0, function
|
|
|
+ * 0-1
|
|
|
+ */
|
|
|
+ if ((bus_number == 0) && (devfn >= 2))
|
|
|
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
|
|
|
+ /*
|
|
|
+ * The PCI-X slots are device ID 2,3. Choose one of
|
|
|
+ * the below "if" blocks based on what is plugged into
|
|
|
+ * the board.
|
|
|
+ */
|
|
|
+#if 1
|
|
|
+ /* Use this option if you aren't using either slot */
|
|
|
+ if (bus_number == 1)
|
|
|
+ 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))
|
|
|
+ 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))
|
|
|
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
|
|
|
+#elif 0
|
|
|
+ /* Use this opion if you are using both slots */
|
|
|
+ if ((bus_number == 1) &&
|
|
|
+ !((devfn == (2 << 3)) || (devfn == (3 << 3))))
|
|
|
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
|
|
|
+#endif
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Shorten the DID timeout so bus errors for PCIe
|
|
|
+ * config reads from non existent devices happen
|
|
|
+ * faster. This allows us to continue booting even if
|
|
|
+ * the above "if" checks are wrong. Once one of these
|
|
|
+ * errors happens, the PCIe port is dead.
|
|
|
+ */
|
|
|
+ cvmmemctl_save.u64 = __read_64bit_c0_register($11, 7);
|
|
|
+ cvmmemctl.u64 = cvmmemctl_save.u64;
|
|
|
+ cvmmemctl.s.didtto = 2;
|
|
|
+ __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);
|
|
|
+ break;
|
|
|
+ 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);
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1) ||
|
|
|
+ OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_1))
|
|
|
+ __write_64bit_c0_register($11, 7, cvmmemctl_save.u64);
|
|
|
+ return PCIBIOS_SUCCESSFUL;
|
|
|
+}
|
|
|
+
|
|
|
+static int octeon_pcie0_read_config(struct pci_bus *bus, unsigned int devfn,
|
|
|
+ int reg, int size, u32 *val)
|
|
|
+{
|
|
|
+ return octeon_pcie_read_config(0, bus, devfn, reg, size, val);
|
|
|
+}
|
|
|
+
|
|
|
+static int octeon_pcie1_read_config(struct pci_bus *bus, unsigned int devfn,
|
|
|
+ int reg, int size, u32 *val)
|
|
|
+{
|
|
|
+ return octeon_pcie_read_config(1, bus, devfn, reg, size, val);
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+
|
|
|
+/**
|
|
|
+ * Write a value to PCI configuration space
|
|
|
+ *
|
|
|
+ * @param bus
|
|
|
+ * @param devfn
|
|
|
+ * @param reg
|
|
|
+ * @param size
|
|
|
+ * @param val
|
|
|
+ * @return
|
|
|
+ */
|
|
|
+static inline int octeon_pcie_write_config(int pcie_port, struct pci_bus *bus,
|
|
|
+ unsigned int devfn, int reg,
|
|
|
+ int size, u32 val)
|
|
|
+{
|
|
|
+ int bus_number = bus->number;
|
|
|
+ /*
|
|
|
+ * We need to force the bus number to be zero on the root
|
|
|
+ * bus. Linux numbers the 2nd root bus to start after all
|
|
|
+ * busses on root 0.
|
|
|
+ */
|
|
|
+ if (bus->parent == NULL)
|
|
|
+ bus_number = 0;
|
|
|
+
|
|
|
+ switch (size) {
|
|
|
+ case 4:
|
|
|
+ cvmx_pcie_config_write32(pcie_port, bus_number, devfn >> 3,
|
|
|
+ devfn & 0x7, reg, val);
|
|
|
+ return PCIBIOS_SUCCESSFUL;
|
|
|
+ case 2:
|
|
|
+ cvmx_pcie_config_write16(pcie_port, bus_number, devfn >> 3,
|
|
|
+ devfn & 0x7, reg, val);
|
|
|
+ return PCIBIOS_SUCCESSFUL;
|
|
|
+ case 1:
|
|
|
+ cvmx_pcie_config_write8(pcie_port, bus_number, devfn >> 3,
|
|
|
+ devfn & 0x7, reg, val);
|
|
|
+ return PCIBIOS_SUCCESSFUL;
|
|
|
+ }
|
|
|
+#if PCI_CONFIG_SPACE_DELAY
|
|
|
+ udelay(PCI_CONFIG_SPACE_DELAY);
|
|
|
+#endif
|
|
|
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
|
|
|
+}
|
|
|
+
|
|
|
+static int octeon_pcie0_write_config(struct pci_bus *bus, unsigned int devfn,
|
|
|
+ int reg, int size, u32 val)
|
|
|
+{
|
|
|
+ return octeon_pcie_write_config(0, bus, devfn, reg, size, val);
|
|
|
+}
|
|
|
+
|
|
|
+static int octeon_pcie1_write_config(struct pci_bus *bus, unsigned int devfn,
|
|
|
+ int reg, int size, u32 val)
|
|
|
+{
|
|
|
+ return octeon_pcie_write_config(1, bus, devfn, reg, size, val);
|
|
|
+}
|
|
|
+
|
|
|
+static struct pci_ops octeon_pcie0_ops = {
|
|
|
+ octeon_pcie0_read_config,
|
|
|
+ octeon_pcie0_write_config,
|
|
|
+};
|
|
|
+
|
|
|
+static struct resource octeon_pcie0_mem_resource = {
|
|
|
+ .name = "Octeon PCIe0 MEM",
|
|
|
+ .flags = IORESOURCE_MEM,
|
|
|
+};
|
|
|
+
|
|
|
+static struct resource octeon_pcie0_io_resource = {
|
|
|
+ .name = "Octeon PCIe0 IO",
|
|
|
+ .flags = IORESOURCE_IO,
|
|
|
+};
|
|
|
+
|
|
|
+static struct pci_controller octeon_pcie0_controller = {
|
|
|
+ .pci_ops = &octeon_pcie0_ops,
|
|
|
+ .mem_resource = &octeon_pcie0_mem_resource,
|
|
|
+ .io_resource = &octeon_pcie0_io_resource,
|
|
|
+};
|
|
|
+
|
|
|
+static struct pci_ops octeon_pcie1_ops = {
|
|
|
+ octeon_pcie1_read_config,
|
|
|
+ octeon_pcie1_write_config,
|
|
|
+};
|
|
|
+
|
|
|
+static struct resource octeon_pcie1_mem_resource = {
|
|
|
+ .name = "Octeon PCIe1 MEM",
|
|
|
+ .flags = IORESOURCE_MEM,
|
|
|
+};
|
|
|
+
|
|
|
+static struct resource octeon_pcie1_io_resource = {
|
|
|
+ .name = "Octeon PCIe1 IO",
|
|
|
+ .flags = IORESOURCE_IO,
|
|
|
+};
|
|
|
+
|
|
|
+static struct pci_controller octeon_pcie1_controller = {
|
|
|
+ .pci_ops = &octeon_pcie1_ops,
|
|
|
+ .mem_resource = &octeon_pcie1_mem_resource,
|
|
|
+ .io_resource = &octeon_pcie1_io_resource,
|
|
|
+};
|
|
|
+
|
|
|
+
|
|
|
+/**
|
|
|
+ * Initialize the Octeon PCIe controllers
|
|
|
+ *
|
|
|
+ * @return
|
|
|
+ */
|
|
|
+static int __init octeon_pcie_setup(void)
|
|
|
+{
|
|
|
+ union cvmx_npei_ctl_status npei_ctl_status;
|
|
|
+ int result;
|
|
|
+
|
|
|
+ /* These chips don't have PCIe */
|
|
|
+ if (!octeon_has_feature(OCTEON_FEATURE_PCIE))
|
|
|
+ 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.
|
|
|
+ */
|
|
|
+ set_io_port_base(CVMX_ADD_IO_SEG(cvmx_pcie_get_io_base_address(0)));
|
|
|
+ ioport_resource.start = 0;
|
|
|
+ ioport_resource.end =
|
|
|
+ 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) {
|
|
|
+ pr_notice("PCIe: Initializing port 0\n");
|
|
|
+ result = cvmx_pcie_rc_initialize(0);
|
|
|
+ if (result == 0) {
|
|
|
+ /* Memory offsets are physical addresses */
|
|
|
+ octeon_pcie0_controller.mem_offset =
|
|
|
+ cvmx_pcie_get_mem_base_address(0);
|
|
|
+ /* IO offsets are Mips virtual addresses */
|
|
|
+ octeon_pcie0_controller.io_map_base =
|
|
|
+ CVMX_ADD_IO_SEG(cvmx_pcie_get_io_base_address
|
|
|
+ (0));
|
|
|
+ octeon_pcie0_controller.io_offset = 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_pcie0_controller.mem_resource->start =
|
|
|
+ cvmx_pcie_get_mem_base_address(0) +
|
|
|
+ (4ul << 30) - (OCTEON_PCI_BAR1_HOLE_SIZE << 20);
|
|
|
+ octeon_pcie0_controller.mem_resource->end =
|
|
|
+ cvmx_pcie_get_mem_base_address(0) +
|
|
|
+ cvmx_pcie_get_mem_size(0) - 1;
|
|
|
+ /*
|
|
|
+ * Ports must be above 16KB for the ISA bus
|
|
|
+ * filtering in the PCI-X to PCI bridge.
|
|
|
+ */
|
|
|
+ octeon_pcie0_controller.io_resource->start = 4 << 10;
|
|
|
+ octeon_pcie0_controller.io_resource->end =
|
|
|
+ cvmx_pcie_get_io_size(0) - 1;
|
|
|
+ register_pci_controller(&octeon_pcie0_controller);
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ pr_notice("PCIe: Port 0 in endpoint mode, skipping.\n");
|
|
|
+ }
|
|
|
+
|
|
|
+ /* 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;
|
|
|
+ }
|
|
|
+
|
|
|
+ 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);
|
|
|
+ }
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+arch_initcall(octeon_pcie_setup);
|