obj-y += octeon-memcpy.o
obj-$(CONFIG_SMP) += smp.o
-obj-$(CONFIG_PCI) += pci-common.o
-obj-$(CONFIG_PCI) += pci.o
-obj-$(CONFIG_PCI) += pcie.o
-obj-$(CONFIG_PCI_MSI) += msi.o
EXTRA_CFLAGS += -Werror
#include <dma-coherence.h>
#ifdef CONFIG_PCI
-#include "pci-common.h"
+#include <asm/octeon/pci-octeon.h>
#endif
#define BAR2_PCI_ADDRESS 0x8000000000ul
+++ /dev/null
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2005-2007 Cavium Networks
- */
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/msi.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-
-#include <asm/octeon/octeon.h>
-#include <asm/octeon/cvmx-npi-defs.h>
-#include <asm/octeon/cvmx-pci-defs.h>
-#include <asm/octeon/cvmx-npei-defs.h>
-#include <asm/octeon/cvmx-pexp-defs.h>
-
-#include "pci-common.h"
-
-/*
- * Each bit in msi_free_irq_bitmask represents a MSI interrupt that is
- * in use.
- */
-static uint64_t msi_free_irq_bitmask;
-
-/*
- * Each bit in msi_multiple_irq_bitmask tells that the device using
- * this bit in msi_free_irq_bitmask is also using the next bit. This
- * is used so we can disable all of the MSI interrupts when a device
- * uses multiple.
- */
-static uint64_t msi_multiple_irq_bitmask;
-
-/*
- * This lock controls updates to msi_free_irq_bitmask and
- * msi_multiple_irq_bitmask.
- */
-static DEFINE_SPINLOCK(msi_free_irq_bitmask_lock);
-
-
-/**
- * Called when a driver request MSI interrupts instead of the
- * legacy INT A-D. This routine will allocate multiple interrupts
- * for MSI devices that support them. A device can override this by
- * programming the MSI control bits [6:4] before calling
- * pci_enable_msi().
- *
- * @param dev Device requesting MSI interrupts
- * @param desc MSI descriptor
- *
- * Returns 0 on success.
- */
-int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
-{
- struct msi_msg msg;
- uint16_t control;
- int configured_private_bits;
- int request_private_bits;
- int irq;
- int irq_step;
- uint64_t search_mask;
-
- /*
- * Read the MSI config to figure out how many IRQs this device
- * wants. Most devices only want 1, which will give
- * configured_private_bits and request_private_bits equal 0.
- */
- pci_read_config_word(dev, desc->msi_attrib.pos + PCI_MSI_FLAGS,
- &control);
-
- /*
- * If the number of private bits has been configured then use
- * that value instead of the requested number. This gives the
- * driver the chance to override the number of interrupts
- * before calling pci_enable_msi().
- */
- configured_private_bits = (control & PCI_MSI_FLAGS_QSIZE) >> 4;
- if (configured_private_bits == 0) {
- /* Nothing is configured, so use the hardware requested size */
- request_private_bits = (control & PCI_MSI_FLAGS_QMASK) >> 1;
- } else {
- /*
- * Use the number of configured bits, assuming the
- * driver wanted to override the hardware request
- * value.
- */
- request_private_bits = configured_private_bits;
- }
-
- /*
- * The PCI 2.3 spec mandates that there are at most 32
- * interrupts. If this device asks for more, only give it one.
- */
- if (request_private_bits > 5)
- request_private_bits = 0;
-
-try_only_one:
- /*
- * The IRQs have to be aligned on a power of two based on the
- * number being requested.
- */
- irq_step = 1 << request_private_bits;
-
- /* Mask with one bit for each IRQ */
- search_mask = (1 << irq_step) - 1;
-
- /*
- * We're going to search msi_free_irq_bitmask_lock for zero
- * bits. This represents an MSI interrupt number that isn't in
- * use.
- */
- spin_lock(&msi_free_irq_bitmask_lock);
- for (irq = 0; irq < 64; irq += irq_step) {
- if ((msi_free_irq_bitmask & (search_mask << irq)) == 0) {
- msi_free_irq_bitmask |= search_mask << irq;
- msi_multiple_irq_bitmask |= (search_mask >> 1) << irq;
- break;
- }
- }
- spin_unlock(&msi_free_irq_bitmask_lock);
-
- /* Make sure the search for available interrupts didn't fail */
- if (irq >= 64) {
- if (request_private_bits) {
- pr_err("arch_setup_msi_irq: Unable to find %d free "
- "interrupts, trying just one",
- 1 << request_private_bits);
- request_private_bits = 0;
- goto try_only_one;
- } else
- panic("arch_setup_msi_irq: Unable to find a free MSI "
- "interrupt");
- }
-
- /* MSI interrupts start at logical IRQ OCTEON_IRQ_MSI_BIT0 */
- irq += OCTEON_IRQ_MSI_BIT0;
-
- switch (octeon_dma_bar_type) {
- case OCTEON_DMA_BAR_TYPE_SMALL:
- /* When not using big bar, Bar 0 is based at 128MB */
- msg.address_lo =
- ((128ul << 20) + CVMX_PCI_MSI_RCV) & 0xffffffff;
- msg.address_hi = ((128ul << 20) + CVMX_PCI_MSI_RCV) >> 32;
- case OCTEON_DMA_BAR_TYPE_BIG:
- /* When using big bar, Bar 0 is based at 0 */
- msg.address_lo = (0 + CVMX_PCI_MSI_RCV) & 0xffffffff;
- msg.address_hi = (0 + CVMX_PCI_MSI_RCV) >> 32;
- break;
- case OCTEON_DMA_BAR_TYPE_PCIE:
- /* When using PCIe, Bar 0 is based at 0 */
- /* FIXME CVMX_NPEI_MSI_RCV* other than 0? */
- msg.address_lo = (0 + CVMX_NPEI_PCIE_MSI_RCV) & 0xffffffff;
- msg.address_hi = (0 + CVMX_NPEI_PCIE_MSI_RCV) >> 32;
- break;
- default:
- panic("arch_setup_msi_irq: Invalid octeon_dma_bar_type\n");
- }
- msg.data = irq - OCTEON_IRQ_MSI_BIT0;
-
- /* Update the number of IRQs the device has available to it */
- control &= ~PCI_MSI_FLAGS_QSIZE;
- control |= request_private_bits << 4;
- pci_write_config_word(dev, desc->msi_attrib.pos + PCI_MSI_FLAGS,
- control);
-
- set_irq_msi(irq, desc);
- write_msi_msg(irq, &msg);
- return 0;
-}
-
-
-/**
- * Called when a device no longer needs its MSI interrupts. All
- * MSI interrupts for the device are freed.
- *
- * @irq: The devices first irq number. There may be multple in sequence.
- */
-void arch_teardown_msi_irq(unsigned int irq)
-{
- int number_irqs;
- uint64_t bitmask;
-
- if ((irq < OCTEON_IRQ_MSI_BIT0) || (irq > OCTEON_IRQ_MSI_BIT63))
- panic("arch_teardown_msi_irq: Attempted to teardown illegal "
- "MSI interrupt (%d)", irq);
- irq -= OCTEON_IRQ_MSI_BIT0;
-
- /*
- * Count the number of IRQs we need to free by looking at the
- * msi_multiple_irq_bitmask. Each bit set means that the next
- * IRQ is also owned by this device.
- */
- number_irqs = 0;
- while ((irq+number_irqs < 64) &&
- (msi_multiple_irq_bitmask & (1ull << (irq + number_irqs))))
- number_irqs++;
- number_irqs++;
- /* Mask with one bit for each IRQ */
- bitmask = (1 << number_irqs) - 1;
- /* Shift the mask to the correct bit location */
- bitmask <<= irq;
- if ((msi_free_irq_bitmask & bitmask) != bitmask)
- panic("arch_teardown_msi_irq: Attempted to teardown MSI "
- "interrupt (%d) not in use", irq);
-
- /* Checks are done, update the in use bitmask */
- spin_lock(&msi_free_irq_bitmask_lock);
- msi_free_irq_bitmask &= ~bitmask;
- msi_multiple_irq_bitmask &= ~bitmask;
- spin_unlock(&msi_free_irq_bitmask_lock);
-}
-
-
-/**
- * Called by the interrupt handling code when an MSI interrupt
- * occurs.
- *
- * @param cpl
- * @param dev_id
- *
- * @return
- */
-static irqreturn_t octeon_msi_interrupt(int cpl, void *dev_id)
-{
- uint64_t msi_bits;
- int irq;
-
- if (octeon_dma_bar_type == OCTEON_DMA_BAR_TYPE_PCIE)
- msi_bits = cvmx_read_csr(CVMX_PEXP_NPEI_MSI_RCV0);
- else
- msi_bits = cvmx_read_csr(CVMX_NPI_NPI_MSI_RCV);
- irq = fls64(msi_bits);
- if (irq) {
- irq += OCTEON_IRQ_MSI_BIT0 - 1;
- if (irq_desc[irq].action) {
- do_IRQ(irq);
- return IRQ_HANDLED;
- } else {
- pr_err("Spurious MSI interrupt %d\n", irq);
- if (octeon_has_feature(OCTEON_FEATURE_PCIE)) {
- /* These chips have PCIe */
- cvmx_write_csr(CVMX_PEXP_NPEI_MSI_RCV0,
- 1ull << (irq -
- OCTEON_IRQ_MSI_BIT0));
- } else {
- /* These chips have PCI */
- cvmx_write_csr(CVMX_NPI_NPI_MSI_RCV,
- 1ull << (irq -
- OCTEON_IRQ_MSI_BIT0));
- }
- }
- }
- return IRQ_NONE;
-}
-
-
-/**
- * Initializes the MSI interrupt handling code
- *
- * @return
- */
-int octeon_msi_initialize(void)
-{
- int r;
- if (octeon_has_feature(OCTEON_FEATURE_PCIE)) {
- r = request_irq(OCTEON_IRQ_PCI_MSI0, octeon_msi_interrupt,
- IRQF_SHARED,
- "MSI[0:63]", octeon_msi_interrupt);
- } else if (octeon_is_pci_host()) {
- r = request_irq(OCTEON_IRQ_PCI_MSI0, octeon_msi_interrupt,
- IRQF_SHARED,
- "MSI[0:15]", octeon_msi_interrupt);
- r += request_irq(OCTEON_IRQ_PCI_MSI1, octeon_msi_interrupt,
- IRQF_SHARED,
- "MSI[16:31]", octeon_msi_interrupt);
- r += request_irq(OCTEON_IRQ_PCI_MSI2, octeon_msi_interrupt,
- IRQF_SHARED,
- "MSI[32:47]", octeon_msi_interrupt);
- r += request_irq(OCTEON_IRQ_PCI_MSI3, octeon_msi_interrupt,
- IRQF_SHARED,
- "MSI[48:63]", octeon_msi_interrupt);
- }
- return 0;
-}
-
-subsys_initcall(octeon_msi_initialize);
+++ /dev/null
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2005-2007 Cavium Networks
- */
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/pci.h>
-#include <linux/interrupt.h>
-#include <linux/time.h>
-#include <linux/delay.h>
-#include "pci-common.h"
-
-typeof(pcibios_map_irq) *octeon_pcibios_map_irq;
-enum octeon_dma_bar_type octeon_dma_bar_type = OCTEON_DMA_BAR_TYPE_INVALID;
-
-/**
- * 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 pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
-{
- if (octeon_pcibios_map_irq)
- return octeon_pcibios_map_irq(dev, slot, pin);
- else
- panic("octeon_pcibios_map_irq doesn't point to a "
- "pcibios_map_irq() function");
-}
-
-
-/**
- * Called to perform platform specific PCI setup
- *
- * @param dev
- * @return
- */
-int pcibios_plat_dev_init(struct pci_dev *dev)
-{
- uint16_t config;
- uint32_t dconfig;
- int pos;
- /*
- * Force the Cache line setting to 64 bytes. The standard
- * Linux bus scan doesn't seem to set it. Octeon really has
- * 128 byte lines, but Intel bridges get really upset if you
- * try and set values above 64 bytes. Value is specified in
- * 32bit words.
- */
- pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 64 / 4);
- /* Set latency timers for all devices */
- pci_write_config_byte(dev, PCI_LATENCY_TIMER, 48);
-
- /* Enable reporting System errors and parity errors on all devices */
- /* Enable parity checking and error reporting */
- pci_read_config_word(dev, PCI_COMMAND, &config);
- config |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
- pci_write_config_word(dev, PCI_COMMAND, config);
-
- if (dev->subordinate) {
- /* Set latency timers on sub bridges */
- pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, 48);
- /* More bridge error detection */
- pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &config);
- config |= PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR;
- pci_write_config_word(dev, PCI_BRIDGE_CONTROL, config);
- }
-
- /* Enable the PCIe normal error reporting */
- pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
- if (pos) {
- /* Update Device Control */
- pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &config);
- /* Correctable Error Reporting */
- config |= PCI_EXP_DEVCTL_CERE;
- /* Non-Fatal Error Reporting */
- config |= PCI_EXP_DEVCTL_NFERE;
- /* Fatal Error Reporting */
- config |= PCI_EXP_DEVCTL_FERE;
- /* Unsupported Request */
- config |= PCI_EXP_DEVCTL_URRE;
- pci_write_config_word(dev, pos + PCI_EXP_DEVCTL, config);
- }
-
- /* Find the Advanced Error Reporting capability */
- pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
- if (pos) {
- /* Clear Uncorrectable Error Status */
- pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,
- &dconfig);
- pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,
- dconfig);
- /* Enable reporting of all uncorrectable errors */
- /* Uncorrectable Error Mask - turned on bits disable errors */
- pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, 0);
- /*
- * Leave severity at HW default. This only controls if
- * errors are reported as uncorrectable or
- * correctable, not if the error is reported.
- */
- /* PCI_ERR_UNCOR_SEVER - Uncorrectable Error Severity */
- /* Clear Correctable Error Status */
- pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS, &dconfig);
- pci_write_config_dword(dev, pos + PCI_ERR_COR_STATUS, dconfig);
- /* Enable reporting of all correctable errors */
- /* Correctable Error Mask - turned on bits disable errors */
- pci_write_config_dword(dev, pos + PCI_ERR_COR_MASK, 0);
- /* Advanced Error Capabilities */
- pci_read_config_dword(dev, pos + PCI_ERR_CAP, &dconfig);
- /* ECRC Generation Enable */
- if (config & PCI_ERR_CAP_ECRC_GENC)
- config |= PCI_ERR_CAP_ECRC_GENE;
- /* ECRC Check Enable */
- if (config & PCI_ERR_CAP_ECRC_CHKC)
- config |= PCI_ERR_CAP_ECRC_CHKE;
- pci_write_config_dword(dev, pos + PCI_ERR_CAP, dconfig);
- /* PCI_ERR_HEADER_LOG - Header Log Register (16 bytes) */
- /* Report all errors to the root complex */
- pci_write_config_dword(dev, pos + PCI_ERR_ROOT_COMMAND,
- PCI_ERR_ROOT_CMD_COR_EN |
- PCI_ERR_ROOT_CMD_NONFATAL_EN |
- PCI_ERR_ROOT_CMD_FATAL_EN);
- /* Clear the Root status register */
- pci_read_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, &dconfig);
- pci_write_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, dconfig);
- }
-
- return 0;
-}
+++ /dev/null
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2005-2007 Cavium Networks
- */
-#ifndef __OCTEON_PCI_COMMON_H__
-#define __OCTEON_PCI_COMMON_H__
-
-#include <linux/pci.h>
-
-/* Some PCI cards require delays when accessing config space. */
-#define PCI_CONFIG_SPACE_DELAY 10000
-
-/* pcibios_map_irq() is defined inside pci-common.c. All it does is call the
- Octeon specific version pointed to by this variable. This function needs to
- change for PCI or PCIe based hosts */
-extern typeof(pcibios_map_irq) *octeon_pcibios_map_irq;
-
-/* The following defines are only used when octeon_dma_bar_type =
- OCTEON_DMA_BAR_TYPE_BIG */
-#define OCTEON_PCI_BAR1_HOLE_BITS 5
-#define OCTEON_PCI_BAR1_HOLE_SIZE (1ul<<(OCTEON_PCI_BAR1_HOLE_BITS+3))
-
-enum octeon_dma_bar_type {
- OCTEON_DMA_BAR_TYPE_INVALID,
- OCTEON_DMA_BAR_TYPE_SMALL,
- OCTEON_DMA_BAR_TYPE_BIG,
- OCTEON_DMA_BAR_TYPE_PCIE
-};
-
-/**
- * This is a variable to tell the DMA mapping system in dma-octeon.c
- * how to map PCI DMA addresses.
- */
-extern enum octeon_dma_bar_type octeon_dma_bar_type;
-
-#endif
+++ /dev/null
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2005-2007 Cavium Networks
- */
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/pci.h>
-#include <linux/interrupt.h>
-#include <linux/time.h>
-#include <linux/delay.h>
-
-#include <asm/time.h>
-
-#include <asm/octeon/octeon.h>
-#include <asm/octeon/cvmx-npi-defs.h>
-#include <asm/octeon/cvmx-pci-defs.h>
-
-#include "pci-common.h"
-
-#define USE_OCTEON_INTERNAL_ARBITER
-
-/*
- * Octeon's PCI controller uses did=3, subdid=2 for PCI IO
- * addresses. Use PCI endian swapping 1 so no address swapping is
- * necessary. The Linux io routines will endian swap the data.
- */
-#define OCTEON_PCI_IOSPACE_BASE 0x80011a0400000000ull
-#define OCTEON_PCI_IOSPACE_SIZE (1ull<<32)
-
-/* Octeon't PCI controller uses did=3, subdid=3 for PCI memory. */
-#define OCTEON_PCI_MEMSPACE_OFFSET (0x00011b0000000000ull)
-
-/**
- * This is the bit decoding used for the Octeon PCI controller addresses
- */
-union octeon_pci_address {
- uint64_t u64;
- struct {
- uint64_t upper:2;
- uint64_t reserved:13;
- uint64_t io:1;
- uint64_t did:5;
- uint64_t subdid:3;
- uint64_t reserved2:4;
- uint64_t endian_swap:2;
- uint64_t reserved3:10;
- uint64_t bus:8;
- uint64_t dev:5;
- uint64_t func:3;
- uint64_t reg:8;
- } s;
-};
-
-/**
- * Return the mapping of PCI device number to IRQ line. Each
- * character in the return string represents the interrupt
- * line for the device at that position. Device 1 maps to the
- * first character, etc. The characters A-D are used for PCI
- * interrupts.
- *
- * Returns PCI interrupt mapping
- */
-const char *octeon_get_pci_interrupts(void)
-{
- /*
- * Returning an empty string causes the interrupts to be
- * routed based on the PCI specification. From the PCI spec:
- *
- * INTA# of Device Number 0 is connected to IRQW on the system
- * board. (Device Number has no significance regarding being
- * located on the system board or in a connector.) INTA# of
- * Device Number 1 is connected to IRQX on the system
- * board. INTA# of Device Number 2 is connected to IRQY on the
- * system board. INTA# of Device Number 3 is connected to IRQZ
- * on the system board. The table below describes how each
- * agent's INTx# lines are connected to the system board
- * interrupt lines. The following equation can be used to
- * determine to which INTx# signal on the system board a given
- * device's INTx# line(s) is connected.
- *
- * MB = (D + I) MOD 4 MB = System board Interrupt (IRQW = 0,
- * IRQX = 1, IRQY = 2, and IRQZ = 3) D = Device Number I =
- * Interrupt Number (INTA# = 0, INTB# = 1, INTC# = 2, and
- * INTD# = 3)
- */
- switch (octeon_bootinfo->board_type) {
- case CVMX_BOARD_TYPE_NAO38:
- /* This is really the NAC38 */
- return "AAAAADABAAAAAAAAAAAAAAAAAAAAAAAA";
- case CVMX_BOARD_TYPE_THUNDER:
- return "";
- case CVMX_BOARD_TYPE_EBH3000:
- return "";
- case CVMX_BOARD_TYPE_EBH3100:
- case CVMX_BOARD_TYPE_CN3010_EVB_HS5:
- case CVMX_BOARD_TYPE_CN3005_EVB_HS5:
- return "AAABAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
- case CVMX_BOARD_TYPE_BBGW_REF:
- return "AABCD";
- default:
- return "";
- }
-}
-
-/**
- * Map a PCI device to the appropriate interrupt line
- *
- * @dev: The Linux PCI device structure for the device to map
- * @slot: The slot number for this device on __BUS 0__. Linux
- * enumerates through all the bridges and figures out the
- * slot on Bus 0 where this device eventually hooks to.
- * @pin: The PCI interrupt pin read from the device, then swizzled
- * as it goes through each bridge.
- * Returns Interrupt number for the device
- */
-int __init octeon_pci_pcibios_map_irq(const struct pci_dev *dev,
- u8 slot, u8 pin)
-{
- int irq_num;
- const char *interrupts;
- int dev_num;
-
- /* Get the board specific interrupt mapping */
- interrupts = octeon_get_pci_interrupts();
-
- dev_num = dev->devfn >> 3;
- if (dev_num < strlen(interrupts))
- irq_num = ((interrupts[dev_num] - 'A' + pin - 1) & 3) +
- OCTEON_IRQ_PCI_INT0;
- else
- irq_num = ((slot + pin - 3) & 3) + OCTEON_IRQ_PCI_INT0;
- return irq_num;
-}
-
-
-/**
- * Read a value from configuration space
- *
- */
-static int octeon_read_config(struct pci_bus *bus, unsigned int devfn,
- int reg, int size, u32 *val)
-{
- union octeon_pci_address pci_addr;
-
- pci_addr.u64 = 0;
- pci_addr.s.upper = 2;
- pci_addr.s.io = 1;
- pci_addr.s.did = 3;
- pci_addr.s.subdid = 1;
- pci_addr.s.endian_swap = 1;
- pci_addr.s.bus = bus->number;
- pci_addr.s.dev = devfn >> 3;
- pci_addr.s.func = devfn & 0x7;
- pci_addr.s.reg = reg;
-
-#if PCI_CONFIG_SPACE_DELAY
- udelay(PCI_CONFIG_SPACE_DELAY);
-#endif
- switch (size) {
- case 4:
- *val = le32_to_cpu(cvmx_read64_uint32(pci_addr.u64));
- return PCIBIOS_SUCCESSFUL;
- case 2:
- *val = le16_to_cpu(cvmx_read64_uint16(pci_addr.u64));
- return PCIBIOS_SUCCESSFUL;
- case 1:
- *val = cvmx_read64_uint8(pci_addr.u64);
- return PCIBIOS_SUCCESSFUL;
- }
- return PCIBIOS_FUNC_NOT_SUPPORTED;
-}
-
-
-/**
- * Write a value to PCI configuration space
- *
- * @bus:
- * @devfn:
- * @reg:
- * @size:
- * @val:
- * Returns
- */
-static int octeon_write_config(struct pci_bus *bus, unsigned int devfn,
- int reg, int size, u32 val)
-{
- union octeon_pci_address pci_addr;
-
- pci_addr.u64 = 0;
- pci_addr.s.upper = 2;
- pci_addr.s.io = 1;
- pci_addr.s.did = 3;
- pci_addr.s.subdid = 1;
- pci_addr.s.endian_swap = 1;
- pci_addr.s.bus = bus->number;
- pci_addr.s.dev = devfn >> 3;
- pci_addr.s.func = devfn & 0x7;
- pci_addr.s.reg = reg;
-
-#if PCI_CONFIG_SPACE_DELAY
- udelay(PCI_CONFIG_SPACE_DELAY);
-#endif
- switch (size) {
- case 4:
- cvmx_write64_uint32(pci_addr.u64, cpu_to_le32(val));
- return PCIBIOS_SUCCESSFUL;
- case 2:
- cvmx_write64_uint16(pci_addr.u64, cpu_to_le16(val));
- return PCIBIOS_SUCCESSFUL;
- case 1:
- cvmx_write64_uint8(pci_addr.u64, val);
- return PCIBIOS_SUCCESSFUL;
- }
- return PCIBIOS_FUNC_NOT_SUPPORTED;
-}
-
-
-static struct pci_ops octeon_pci_ops = {
- octeon_read_config,
- octeon_write_config,
-};
-
-static struct resource octeon_pci_mem_resource = {
- .start = 0,
- .end = 0,
- .name = "Octeon PCI MEM",
- .flags = IORESOURCE_MEM,
-};
-
-/*
- * PCI ports must be above 16KB so the ISA bus filtering in the PCI-X to PCI
- * bridge
- */
-static struct resource octeon_pci_io_resource = {
- .start = 0x4000,
- .end = OCTEON_PCI_IOSPACE_SIZE - 1,
- .name = "Octeon PCI IO",
- .flags = IORESOURCE_IO,
-};
-
-static struct pci_controller octeon_pci_controller = {
- .pci_ops = &octeon_pci_ops,
- .mem_resource = &octeon_pci_mem_resource,
- .mem_offset = OCTEON_PCI_MEMSPACE_OFFSET,
- .io_resource = &octeon_pci_io_resource,
- .io_offset = 0,
- .io_map_base = OCTEON_PCI_IOSPACE_BASE,
-};
-
-
-/**
- * Low level initialize the Octeon PCI controller
- *
- * Returns
- */
-static void octeon_pci_initialize(void)
-{
- union cvmx_pci_cfg01 cfg01;
- union cvmx_npi_ctl_status ctl_status;
- union cvmx_pci_ctl_status_2 ctl_status_2;
- union cvmx_pci_cfg19 cfg19;
- union cvmx_pci_cfg16 cfg16;
- union cvmx_pci_cfg22 cfg22;
- union cvmx_pci_cfg56 cfg56;
-
- /* Reset the PCI Bus */
- cvmx_write_csr(CVMX_CIU_SOFT_PRST, 0x1);
- cvmx_read_csr(CVMX_CIU_SOFT_PRST);
-
- udelay(2000); /* Hold PCI reset for 2 ms */
-
- ctl_status.u64 = 0; /* cvmx_read_csr(CVMX_NPI_CTL_STATUS); */
- ctl_status.s.max_word = 1;
- ctl_status.s.timer = 1;
- cvmx_write_csr(CVMX_NPI_CTL_STATUS, ctl_status.u64);
-
- /* Deassert PCI reset and advertize PCX Host Mode Device Capability
- (64b) */
- cvmx_write_csr(CVMX_CIU_SOFT_PRST, 0x4);
- cvmx_read_csr(CVMX_CIU_SOFT_PRST);
-
- udelay(2000); /* Wait 2 ms after deasserting PCI reset */
-
- ctl_status_2.u32 = 0;
- ctl_status_2.s.tsr_hwm = 1; /* Initializes to 0. Must be set
- before any PCI reads. */
- ctl_status_2.s.bar2pres = 1; /* Enable BAR2 */
- ctl_status_2.s.bar2_enb = 1;
- ctl_status_2.s.bar2_cax = 1; /* Don't use L2 */
- ctl_status_2.s.bar2_esx = 1;
- ctl_status_2.s.pmo_amod = 1; /* Round robin priority */
- if (octeon_dma_bar_type == OCTEON_DMA_BAR_TYPE_BIG) {
- /* BAR1 hole */
- ctl_status_2.s.bb1_hole = OCTEON_PCI_BAR1_HOLE_BITS;
- ctl_status_2.s.bb1_siz = 1; /* BAR1 is 2GB */
- ctl_status_2.s.bb_ca = 1; /* Don't use L2 with big bars */
- ctl_status_2.s.bb_es = 1; /* Big bar in byte swap mode */
- ctl_status_2.s.bb1 = 1; /* BAR1 is big */
- ctl_status_2.s.bb0 = 1; /* BAR0 is big */
- }
-
- octeon_npi_write32(CVMX_NPI_PCI_CTL_STATUS_2, ctl_status_2.u32);
- udelay(2000); /* Wait 2 ms before doing PCI reads */
-
- ctl_status_2.u32 = octeon_npi_read32(CVMX_NPI_PCI_CTL_STATUS_2);
- pr_notice("PCI Status: %s %s-bit\n",
- ctl_status_2.s.ap_pcix ? "PCI-X" : "PCI",
- ctl_status_2.s.ap_64ad ? "64" : "32");
-
- if (OCTEON_IS_MODEL(OCTEON_CN58XX) || OCTEON_IS_MODEL(OCTEON_CN50XX)) {
- union cvmx_pci_cnt_reg cnt_reg_start;
- union cvmx_pci_cnt_reg cnt_reg_end;
- unsigned long cycles, pci_clock;
-
- cnt_reg_start.u64 = cvmx_read_csr(CVMX_NPI_PCI_CNT_REG);
- cycles = read_c0_cvmcount();
- udelay(1000);
- cnt_reg_end.u64 = cvmx_read_csr(CVMX_NPI_PCI_CNT_REG);
- cycles = read_c0_cvmcount() - cycles;
- pci_clock = (cnt_reg_end.s.pcicnt - cnt_reg_start.s.pcicnt) /
- (cycles / (mips_hpt_frequency / 1000000));
- pr_notice("PCI Clock: %lu MHz\n", pci_clock);
- }
-
- /*
- * TDOMC must be set to one in PCI mode. TDOMC should be set to 4
- * in PCI-X mode to allow four oustanding splits. Otherwise,
- * should not change from its reset value. Don't write PCI_CFG19
- * in PCI mode (0x82000001 reset value), write it to 0x82000004
- * after PCI-X mode is known. MRBCI,MDWE,MDRE -> must be zero.
- * MRBCM -> must be one.
- */
- if (ctl_status_2.s.ap_pcix) {
- cfg19.u32 = 0;
- /*
- * Target Delayed/Split request outstanding maximum
- * count. [1..31] and 0=32. NOTE: If the user
- * programs these bits beyond the Designed Maximum
- * outstanding count, then the designed maximum table
- * depth will be used instead. No additional
- * Deferred/Split transactions will be accepted if
- * this outstanding maximum count is
- * reached. Furthermore, no additional deferred/split
- * transactions will be accepted if the I/O delay/ I/O
- * Split Request outstanding maximum is reached.
- */
- cfg19.s.tdomc = 4;
- /*
- * Master Deferred Read Request Outstanding Max Count
- * (PCI only). CR4C[26:24] Max SAC cycles MAX DAC
- * cycles 000 8 4 001 1 0 010 2 1 011 3 1 100 4 2 101
- * 5 2 110 6 3 111 7 3 For example, if these bits are
- * programmed to 100, the core can support 2 DAC
- * cycles, 4 SAC cycles or a combination of 1 DAC and
- * 2 SAC cycles. NOTE: For the PCI-X maximum
- * outstanding split transactions, refer to
- * CRE0[22:20].
- */
- cfg19.s.mdrrmc = 2;
- /*
- * Master Request (Memory Read) Byte Count/Byte Enable
- * select. 0 = Byte Enables valid. In PCI mode, a
- * burst transaction cannot be performed using Memory
- * Read command=4?h6. 1 = DWORD Byte Count valid
- * (default). In PCI Mode, the memory read byte
- * enables are automatically generated by the
- * core. Note: N3 Master Request transaction sizes are
- * always determined through the
- * am_attr[<35:32>|<7:0>] field.
- */
- cfg19.s.mrbcm = 1;
- octeon_npi_write32(CVMX_NPI_PCI_CFG19, cfg19.u32);
- }
-
-
- cfg01.u32 = 0;
- cfg01.s.msae = 1; /* Memory Space Access Enable */
- cfg01.s.me = 1; /* Master Enable */
- cfg01.s.pee = 1; /* PERR# Enable */
- cfg01.s.see = 1; /* System Error Enable */
- cfg01.s.fbbe = 1; /* Fast Back to Back Transaction Enable */
-
- octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32);
-
-#ifdef USE_OCTEON_INTERNAL_ARBITER
- /*
- * When OCTEON is a PCI host, most systems will use OCTEON's
- * internal arbiter, so must enable it before any PCI/PCI-X
- * traffic can occur.
- */
- {
- union cvmx_npi_pci_int_arb_cfg pci_int_arb_cfg;
-
- pci_int_arb_cfg.u64 = 0;
- pci_int_arb_cfg.s.en = 1; /* Internal arbiter enable */
- cvmx_write_csr(CVMX_NPI_PCI_INT_ARB_CFG, pci_int_arb_cfg.u64);
- }
-#endif /* USE_OCTEON_INTERNAL_ARBITER */
-
- /*
- * Preferrably written to 1 to set MLTD. [RDSATI,TRTAE,
- * TWTAE,TMAE,DPPMR -> must be zero. TILT -> must not be set to
- * 1..7.
- */
- cfg16.u32 = 0;
- cfg16.s.mltd = 1; /* Master Latency Timer Disable */
- octeon_npi_write32(CVMX_NPI_PCI_CFG16, cfg16.u32);
-
- /*
- * Should be written to 0x4ff00. MTTV -> must be zero.
- * FLUSH -> must be 1. MRV -> should be 0xFF.
- */
- cfg22.u32 = 0;
- /* Master Retry Value [1..255] and 0=infinite */
- cfg22.s.mrv = 0xff;
- /*
- * AM_DO_FLUSH_I control NOTE: This bit MUST BE ONE for proper
- * N3K operation.
- */
- cfg22.s.flush = 1;
- octeon_npi_write32(CVMX_NPI_PCI_CFG22, cfg22.u32);
-
- /*
- * MOST Indicates the maximum number of outstanding splits (in -1
- * notation) when OCTEON is in PCI-X mode. PCI-X performance is
- * affected by the MOST selection. Should generally be written
- * with one of 0x3be807, 0x2be807, 0x1be807, or 0x0be807,
- * depending on the desired MOST of 3, 2, 1, or 0, respectively.
- */
- cfg56.u32 = 0;
- cfg56.s.pxcid = 7; /* RO - PCI-X Capability ID */
- cfg56.s.ncp = 0xe8; /* RO - Next Capability Pointer */
- cfg56.s.dpere = 1; /* Data Parity Error Recovery Enable */
- cfg56.s.roe = 1; /* Relaxed Ordering Enable */
- cfg56.s.mmbc = 1; /* Maximum Memory Byte Count
- [0=512B,1=1024B,2=2048B,3=4096B] */
- cfg56.s.most = 3; /* Maximum outstanding Split transactions [0=1
- .. 7=32] */
-
- octeon_npi_write32(CVMX_NPI_PCI_CFG56, cfg56.u32);
-
- /*
- * Affects PCI performance when OCTEON services reads to its
- * BAR1/BAR2. Refer to Section 10.6.1. The recommended values are
- * 0x22, 0x33, and 0x33 for PCI_READ_CMD_6, PCI_READ_CMD_C, and
- * PCI_READ_CMD_E, respectively. Unfortunately due to errata DDR-700,
- * these values need to be changed so they won't possibly prefetch off
- * of the end of memory if PCI is DMAing a buffer at the end of
- * memory. Note that these values differ from their reset values.
- */
- octeon_npi_write32(CVMX_NPI_PCI_READ_CMD_6, 0x21);
- octeon_npi_write32(CVMX_NPI_PCI_READ_CMD_C, 0x31);
- octeon_npi_write32(CVMX_NPI_PCI_READ_CMD_E, 0x31);
-}
-
-
-/**
- * Initialize the Octeon PCI controller
- *
- * Returns
- */
-static int __init octeon_pci_setup(void)
-{
- union cvmx_npi_mem_access_subidx mem_access;
- int index;
-
- /* Only these chips have PCI */
- if (octeon_has_feature(OCTEON_FEATURE_PCIE))
- return 0;
-
- /* Point pcibios_map_irq() to the PCI version of it */
- octeon_pcibios_map_irq = octeon_pci_pcibios_map_irq;
-
- /* Only use the big bars on chips that support it */
- if (OCTEON_IS_MODEL(OCTEON_CN31XX) ||
- OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2) ||
- OCTEON_IS_MODEL(OCTEON_CN38XX_PASS1))
- octeon_dma_bar_type = OCTEON_DMA_BAR_TYPE_SMALL;
- else
- octeon_dma_bar_type = OCTEON_DMA_BAR_TYPE_BIG;
-
- /* PCI I/O and PCI MEM values */
- set_io_port_base(OCTEON_PCI_IOSPACE_BASE);
- ioport_resource.start = 0;
- ioport_resource.end = OCTEON_PCI_IOSPACE_SIZE - 1;
- if (!octeon_is_pci_host()) {
- pr_notice("Not in host mode, PCI Controller not initialized\n");
- return 0;
- }
-
- pr_notice("%s Octeon big bar support\n",
- (octeon_dma_bar_type ==
- OCTEON_DMA_BAR_TYPE_BIG) ? "Enabling" : "Disabling");
-
- octeon_pci_initialize();
-
- mem_access.u64 = 0;
- mem_access.s.esr = 1; /* Endian-Swap on read. */
- mem_access.s.esw = 1; /* Endian-Swap on write. */
- mem_access.s.nsr = 0; /* No-Snoop on read. */
- mem_access.s.nsw = 0; /* No-Snoop on write. */
- mem_access.s.ror = 0; /* Relax Read on read. */
- mem_access.s.row = 0; /* Relax Order on write. */
- mem_access.s.ba = 0; /* PCI Address bits [63:36]. */
- cvmx_write_csr(CVMX_NPI_MEM_ACCESS_SUBID3, mem_access.u64);
-
- /*
- * Remap the Octeon BAR 2 above all 32 bit devices
- * (0x8000000000ul). This is done here so it is remapped
- * before the readl()'s below. We don't want BAR2 overlapping
- * with BAR0/BAR1 during these reads.
- */
- octeon_npi_write32(CVMX_NPI_PCI_CFG08, 0);
- octeon_npi_write32(CVMX_NPI_PCI_CFG09, 0x80);
-
- /* Disable the BAR1 movable mappings */
- for (index = 0; index < 32; index++)
- octeon_npi_write32(CVMX_NPI_PCI_BAR1_INDEXX(index), 0);
-
- if (octeon_dma_bar_type == OCTEON_DMA_BAR_TYPE_BIG) {
- /* Remap the Octeon BAR 0 to 0-2GB */
- octeon_npi_write32(CVMX_NPI_PCI_CFG04, 0);
- octeon_npi_write32(CVMX_NPI_PCI_CFG05, 0);
-
- /*
- * Remap the Octeon BAR 1 to map 2GB-4GB (minus the
- * BAR 1 hole).
- */
- octeon_npi_write32(CVMX_NPI_PCI_CFG06, 2ul << 30);
- octeon_npi_write32(CVMX_NPI_PCI_CFG07, 0);
-
- /* Devices go after BAR1 */
- octeon_pci_mem_resource.start =
- OCTEON_PCI_MEMSPACE_OFFSET + (4ul << 30) -
- (OCTEON_PCI_BAR1_HOLE_SIZE << 20);
- octeon_pci_mem_resource.end =
- octeon_pci_mem_resource.start + (1ul << 30);
- } else {
- /* Remap the Octeon BAR 0 to map 128MB-(128MB+4KB) */
- octeon_npi_write32(CVMX_NPI_PCI_CFG04, 128ul << 20);
- octeon_npi_write32(CVMX_NPI_PCI_CFG05, 0);
-
- /* Remap the Octeon BAR 1 to map 0-128MB */
- octeon_npi_write32(CVMX_NPI_PCI_CFG06, 0);
- octeon_npi_write32(CVMX_NPI_PCI_CFG07, 0);
-
- /* Devices go after BAR0 */
- octeon_pci_mem_resource.start =
- OCTEON_PCI_MEMSPACE_OFFSET + (128ul << 20) +
- (4ul << 10);
- octeon_pci_mem_resource.end =
- octeon_pci_mem_resource.start + (1ul << 30);
- }
-
- register_pci_controller(&octeon_pci_controller);
-
- /*
- * Clear any errors that might be pending from before the bus
- * was setup properly.
- */
- cvmx_write_csr(CVMX_NPI_PCI_INT_SUM2, -1);
- return 0;
-}
-
-arch_initcall(octeon_pci_setup);
+++ /dev/null
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2007, 2008 Cavium Networks
- */
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/pci.h>
-#include <linux/interrupt.h>
-#include <linux/time.h>
-#include <linux/delay.h>
-
-#include <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-helper-errata.h>
-
-#include "pci-common.h"
-
-union cvmx_pcie_address {
- uint64_t u64;
- struct {
- uint64_t upper:2; /* Normally 2 for XKPHYS */
- uint64_t reserved_49_61:13; /* Must be zero */
- uint64_t io:1; /* 1 for IO space access */
- uint64_t did:5; /* PCIe DID = 3 */
- uint64_t subdid:3; /* PCIe SubDID = 1 */
- uint64_t reserved_36_39:4; /* Must be zero */
- uint64_t es:2; /* Endian swap = 1 */
- uint64_t port:2; /* PCIe port 0,1 */
- uint64_t reserved_29_31:3; /* Must be zero */
- /*
- * Selects the type of the configuration request (0 = type 0,
- * 1 = type 1).
- */
- uint64_t ty:1;
- /* Target bus number sent in the ID in the request. */
- uint64_t bus:8;
- /*
- * Target device number sent in the ID in the
- * request. Note that Dev must be zero for type 0
- * configuration requests.
- */
- uint64_t dev:5;
- /* Target function number sent in the ID in the request. */
- uint64_t func:3;
- /*
- * Selects a register in the configuration space of
- * the target.
- */
- uint64_t reg:12;
- } config;
- struct {
- uint64_t upper:2; /* Normally 2 for XKPHYS */
- uint64_t reserved_49_61:13; /* Must be zero */
- uint64_t io:1; /* 1 for IO space access */
- uint64_t did:5; /* PCIe DID = 3 */
- uint64_t subdid:3; /* PCIe SubDID = 2 */
- uint64_t reserved_36_39:4; /* Must be zero */
- uint64_t es:2; /* Endian swap = 1 */
- uint64_t port:2; /* PCIe port 0,1 */
- uint64_t address:32; /* PCIe IO address */
- } io;
- struct {
- uint64_t upper:2; /* Normally 2 for XKPHYS */
- uint64_t reserved_49_61:13; /* Must be zero */
- uint64_t io:1; /* 1 for IO space access */
- uint64_t did:5; /* PCIe DID = 3 */
- uint64_t subdid:3; /* PCIe SubDID = 3-6 */
- uint64_t reserved_36_39:4; /* Must be zero */
- uint64_t address:36; /* PCIe Mem address */
- } mem;
-};
-
-/**
- * Return the Core virtual base address for PCIe IO access. IOs are
- * read/written as an offset from this address.
- *
- * @pcie_port: PCIe port the IO is for
- *
- * Returns 64bit Octeon IO base address for read/write
- */
-static inline uint64_t cvmx_pcie_get_io_base_address(int pcie_port)
-{
- union cvmx_pcie_address pcie_addr;
- pcie_addr.u64 = 0;
- pcie_addr.io.upper = 0;
- pcie_addr.io.io = 1;
- pcie_addr.io.did = 3;
- pcie_addr.io.subdid = 2;
- pcie_addr.io.es = 1;
- pcie_addr.io.port = pcie_port;
- return pcie_addr.u64;
-}
-
-/**
- * Size of the IO address region returned at address
- * cvmx_pcie_get_io_base_address()
- *
- * @pcie_port: PCIe port the IO is for
- *
- * Returns Size of the IO window
- */
-static inline uint64_t cvmx_pcie_get_io_size(int pcie_port)
-{
- return 1ull << 32;
-}
-
-/**
- * Return the Core virtual base address for PCIe MEM access. Memory is
- * read/written as an offset from this address.
- *
- * @pcie_port: PCIe port the IO is for
- *
- * Returns 64bit Octeon IO base address for read/write
- */
-static inline uint64_t cvmx_pcie_get_mem_base_address(int pcie_port)
-{
- union cvmx_pcie_address pcie_addr;
- pcie_addr.u64 = 0;
- pcie_addr.mem.upper = 0;
- pcie_addr.mem.io = 1;
- pcie_addr.mem.did = 3;
- pcie_addr.mem.subdid = 3 + pcie_port;
- return pcie_addr.u64;
-}
-
-/**
- * Size of the Mem address region returned at address
- * cvmx_pcie_get_mem_base_address()
- *
- * @pcie_port: PCIe port the IO is for
- *
- * Returns Size of the Mem window
- */
-static inline uint64_t cvmx_pcie_get_mem_size(int pcie_port)
-{
- return 1ull << 36;
-}
-
-/**
- * Read a PCIe config space register indirectly. This is used for
- * registers of the form PCIEEP_CFG??? and PCIERC?_CFG???.
- *
- * @pcie_port: PCIe port to read from
- * @cfg_offset: Address to read
- *
- * Returns Value read
- */
-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;
-}
-
-/**
- * Write a PCIe config space register indirectly. This is used for
- * registers of the form PCIEEP_CFG??? and PCIERC?_CFG???.
- *
- * @pcie_port: PCIe port to write to
- * @cfg_offset: Address to write
- * @val: Value to write
- */
-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);
-}
-
-/**
- * Build a PCIe config space request address for a device
- *
- * @pcie_port: PCIe port to access
- * @bus: Sub bus
- * @dev: Device ID
- * @fn: Device sub function
- * @reg: Register to access
- *
- * Returns 64bit Octeon IO address
- */
-static inline uint64_t __cvmx_pcie_build_config_addr(int pcie_port, int bus,
- int dev, int fn, int reg)
-{
- union cvmx_pcie_address pcie_addr;
- union cvmx_pciercx_cfg006 pciercx_cfg006;
-
- pciercx_cfg006.u32 =
- cvmx_pcie_cfgx_read(pcie_port, CVMX_PCIERCX_CFG006(pcie_port));
- if ((bus <= pciercx_cfg006.s.pbnum) && (dev != 0))
- return 0;
-
- pcie_addr.u64 = 0;
- pcie_addr.config.upper = 2;
- pcie_addr.config.io = 1;
- pcie_addr.config.did = 3;
- pcie_addr.config.subdid = 1;
- pcie_addr.config.es = 1;
- pcie_addr.config.port = pcie_port;
- pcie_addr.config.ty = (bus > pciercx_cfg006.s.pbnum);
- pcie_addr.config.bus = bus;
- pcie_addr.config.dev = dev;
- pcie_addr.config.func = fn;
- pcie_addr.config.reg = reg;
- return pcie_addr.u64;
-}
-
-/**
- * Read 8bits from a Device's config space
- *
- * @pcie_port: PCIe port the device is on
- * @bus: Sub bus
- * @dev: Device ID
- * @fn: Device sub function
- * @reg: Register to access
- *
- * Returns Result of the read
- */
-static uint8_t cvmx_pcie_config_read8(int pcie_port, int bus, int dev,
- int fn, int reg)
-{
- uint64_t address =
- __cvmx_pcie_build_config_addr(pcie_port, bus, dev, fn, reg);
- if (address)
- return cvmx_read64_uint8(address);
- else
- return 0xff;
-}
-
-/**
- * Read 16bits from a Device's config space
- *
- * @pcie_port: PCIe port the device is on
- * @bus: Sub bus
- * @dev: Device ID
- * @fn: Device sub function
- * @reg: Register to access
- *
- * Returns Result of the read
- */
-static uint16_t cvmx_pcie_config_read16(int pcie_port, int bus, int dev,
- int fn, int reg)
-{
- uint64_t address =
- __cvmx_pcie_build_config_addr(pcie_port, bus, dev, fn, reg);
- if (address)
- return le16_to_cpu(cvmx_read64_uint16(address));
- else
- return 0xffff;
-}
-
-/**
- * Read 32bits from a Device's config space
- *
- * @pcie_port: PCIe port the device is on
- * @bus: Sub bus
- * @dev: Device ID
- * @fn: Device sub function
- * @reg: Register to access
- *
- * Returns Result of the read
- */
-static uint32_t cvmx_pcie_config_read32(int pcie_port, int bus, int dev,
- int fn, int reg)
-{
- uint64_t address =
- __cvmx_pcie_build_config_addr(pcie_port, bus, dev, fn, reg);
- if (address)
- return le32_to_cpu(cvmx_read64_uint32(address));
- else
- return 0xffffffff;
-}
-
-/**
- * Write 8bits to a Device's config space
- *
- * @pcie_port: PCIe port the device is on
- * @bus: Sub bus
- * @dev: Device ID
- * @fn: Device sub function
- * @reg: Register to access
- * @val: Value to write
- */
-static void cvmx_pcie_config_write8(int pcie_port, int bus, int dev, int fn,
- int reg, uint8_t val)
-{
- uint64_t address =
- __cvmx_pcie_build_config_addr(pcie_port, bus, dev, fn, reg);
- if (address)
- cvmx_write64_uint8(address, val);
-}
-
-/**
- * Write 16bits to a Device's config space
- *
- * @pcie_port: PCIe port the device is on
- * @bus: Sub bus
- * @dev: Device ID
- * @fn: Device sub function
- * @reg: Register to access
- * @val: Value to write
- */
-static void cvmx_pcie_config_write16(int pcie_port, int bus, int dev, int fn,
- int reg, uint16_t val)
-{
- uint64_t address =
- __cvmx_pcie_build_config_addr(pcie_port, bus, dev, fn, reg);
- if (address)
- cvmx_write64_uint16(address, cpu_to_le16(val));
-}
-
-/**
- * Write 32bits to a Device's config space
- *
- * @pcie_port: PCIe port the device is on
- * @bus: Sub bus
- * @dev: Device ID
- * @fn: Device sub function
- * @reg: Register to access
- * @val: Value to write
- */
-static void cvmx_pcie_config_write32(int pcie_port, int bus, int dev, int fn,
- int reg, uint32_t val)
-{
- uint64_t address =
- __cvmx_pcie_build_config_addr(pcie_port, bus, dev, fn, reg);
- if (address)
- cvmx_write64_uint32(address, cpu_to_le32(val));
-}
-
-/**
- * Initialize the RC config space CSRs
- *
- * @pcie_port: PCIe port to initialize
- */
-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;
- union cvmx_pciercx_cfg006 pciercx_cfg006;
- union cvmx_pciercx_cfg008 pciercx_cfg008;
- union cvmx_pciercx_cfg009 pciercx_cfg009;
- union cvmx_pciercx_cfg010 pciercx_cfg010;
- union cvmx_pciercx_cfg011 pciercx_cfg011;
- union cvmx_pciercx_cfg035 pciercx_cfg035;
- union cvmx_pciercx_cfg075 pciercx_cfg075;
- union cvmx_pciercx_cfg034 pciercx_cfg034;
-
- /* Max Payload Size (PCIE*_CFG030[MPS]) */
- /* Max Read Request Size (PCIE*_CFG030[MRRS]) */
- /* Relaxed-order, no-snoop enables (PCIE*_CFG030[RO_EN,NS_EN] */
- /* Error Message Enables (PCIE*_CFG030[CE_EN,NFE_EN,FE_EN,UR_EN]) */
- 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;
- /*
- * Max read request size = 128 bytes for best Octeon DMA
- * performance.
- */
- pciercx_cfg030.s.mrrs = 0;
- /* Enable relaxed ordering. */
- pciercx_cfg030.s.ro_en = 1;
- /* Enable no snoop. */
- pciercx_cfg030.s.ns_en = 1;
- /* Correctable error reporting enable. */
- pciercx_cfg030.s.ce_en = 1;
- /* Non-fatal error reporting enable. */
- pciercx_cfg030.s.nfe_en = 1;
- /* Fatal error reporting enable. */
- pciercx_cfg030.s.fe_en = 1;
- /* Unsupported request reporting enable. */
- pciercx_cfg030.s.ur_en = 1;
- cvmx_pcie_cfgx_write(pcie_port, CVMX_PCIERCX_CFG030(pcie_port),
- pciercx_cfg030.u32);
-
- /*
- * Max Payload Size (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);
--- /dev/null
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2005-2009 Cavium Networks
+ */
+
+#ifndef __PCI_OCTEON_H__
+#define __PCI_OCTEON_H__
+
+#include <linux/pci.h>
+
+/* Some PCI cards require delays when accessing config space. */
+#define PCI_CONFIG_SPACE_DELAY 10000
+
+/*
+ * pcibios_map_irq() is defined inside pci-octeon.c. All it does is
+ * call the Octeon specific version pointed to by this variable. This
+ * function needs to change for PCI or PCIe based hosts.
+ */
+extern int (*octeon_pcibios_map_irq)(const struct pci_dev *dev,
+ u8 slot, u8 pin);
+
+/*
+ * The following defines are used when octeon_dma_bar_type =
+ * OCTEON_DMA_BAR_TYPE_BIG
+ */
+#define OCTEON_PCI_BAR1_HOLE_BITS 5
+#define OCTEON_PCI_BAR1_HOLE_SIZE (1ul<<(OCTEON_PCI_BAR1_HOLE_BITS+3))
+
+enum octeon_dma_bar_type {
+ OCTEON_DMA_BAR_TYPE_INVALID,
+ OCTEON_DMA_BAR_TYPE_SMALL,
+ OCTEON_DMA_BAR_TYPE_BIG,
+ OCTEON_DMA_BAR_TYPE_PCIE
+};
+
+/*
+ * This tells the DMA mapping system in dma-octeon.c how to map PCI
+ * DMA addresses.
+ */
+extern enum octeon_dma_bar_type octeon_dma_bar_type;
+
+#endif
obj-$(CONFIG_ZAO_CAPCELLA) += fixup-capcella.o
obj-$(CONFIG_WR_PPMC) += fixup-wrppmc.o
obj-$(CONFIG_MIKROTIK_RB532) += pci-rc32434.o ops-rc32434.o fixup-rc32434.o
+obj-$(CONFIG_CPU_CAVIUM_OCTEON) += pci-octeon.o pcie-octeon.o
+
+ifdef CONFIG_PCI_MSI
+obj-$(CONFIG_CPU_CAVIUM_OCTEON) += msi-octeon.o
+endif
--- /dev/null
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2005-2009 Cavium Networks
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/msi.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+
+#include <asm/octeon/octeon.h>
+#include <asm/octeon/cvmx-npi-defs.h>
+#include <asm/octeon/cvmx-pci-defs.h>
+#include <asm/octeon/cvmx-npei-defs.h>
+#include <asm/octeon/cvmx-pexp-defs.h>
+#include <asm/octeon/pci-octeon.h>
+
+/*
+ * Each bit in msi_free_irq_bitmask represents a MSI interrupt that is
+ * in use.
+ */
+static uint64_t msi_free_irq_bitmask;
+
+/*
+ * Each bit in msi_multiple_irq_bitmask tells that the device using
+ * this bit in msi_free_irq_bitmask is also using the next bit. This
+ * is used so we can disable all of the MSI interrupts when a device
+ * uses multiple.
+ */
+static uint64_t msi_multiple_irq_bitmask;
+
+/*
+ * This lock controls updates to msi_free_irq_bitmask and
+ * msi_multiple_irq_bitmask.
+ */
+static DEFINE_SPINLOCK(msi_free_irq_bitmask_lock);
+
+
+/**
+ * Called when a driver request MSI interrupts instead of the
+ * legacy INT A-D. This routine will allocate multiple interrupts
+ * for MSI devices that support them. A device can override this by
+ * programming the MSI control bits [6:4] before calling
+ * pci_enable_msi().
+ *
+ * @dev: Device requesting MSI interrupts
+ * @desc: MSI descriptor
+ *
+ * Returns 0 on success.
+ */
+int arch_setup_msi_irq(struct pci_dev *dev, struct msi_desc *desc)
+{
+ struct msi_msg msg;
+ uint16_t control;
+ int configured_private_bits;
+ int request_private_bits;
+ int irq;
+ int irq_step;
+ uint64_t search_mask;
+
+ /*
+ * Read the MSI config to figure out how many IRQs this device
+ * wants. Most devices only want 1, which will give
+ * configured_private_bits and request_private_bits equal 0.
+ */
+ pci_read_config_word(dev, desc->msi_attrib.pos + PCI_MSI_FLAGS,
+ &control);
+
+ /*
+ * If the number of private bits has been configured then use
+ * that value instead of the requested number. This gives the
+ * driver the chance to override the number of interrupts
+ * before calling pci_enable_msi().
+ */
+ configured_private_bits = (control & PCI_MSI_FLAGS_QSIZE) >> 4;
+ if (configured_private_bits == 0) {
+ /* Nothing is configured, so use the hardware requested size */
+ request_private_bits = (control & PCI_MSI_FLAGS_QMASK) >> 1;
+ } else {
+ /*
+ * Use the number of configured bits, assuming the
+ * driver wanted to override the hardware request
+ * value.
+ */
+ request_private_bits = configured_private_bits;
+ }
+
+ /*
+ * The PCI 2.3 spec mandates that there are at most 32
+ * interrupts. If this device asks for more, only give it one.
+ */
+ if (request_private_bits > 5)
+ request_private_bits = 0;
+
+try_only_one:
+ /*
+ * The IRQs have to be aligned on a power of two based on the
+ * number being requested.
+ */
+ irq_step = 1 << request_private_bits;
+
+ /* Mask with one bit for each IRQ */
+ search_mask = (1 << irq_step) - 1;
+
+ /*
+ * We're going to search msi_free_irq_bitmask_lock for zero
+ * bits. This represents an MSI interrupt number that isn't in
+ * use.
+ */
+ spin_lock(&msi_free_irq_bitmask_lock);
+ for (irq = 0; irq < 64; irq += irq_step) {
+ if ((msi_free_irq_bitmask & (search_mask << irq)) == 0) {
+ msi_free_irq_bitmask |= search_mask << irq;
+ msi_multiple_irq_bitmask |= (search_mask >> 1) << irq;
+ break;
+ }
+ }
+ spin_unlock(&msi_free_irq_bitmask_lock);
+
+ /* Make sure the search for available interrupts didn't fail */
+ if (irq >= 64) {
+ if (request_private_bits) {
+ pr_err("arch_setup_msi_irq: Unable to find %d free "
+ "interrupts, trying just one",
+ 1 << request_private_bits);
+ request_private_bits = 0;
+ goto try_only_one;
+ } else
+ panic("arch_setup_msi_irq: Unable to find a free MSI "
+ "interrupt");
+ }
+
+ /* MSI interrupts start at logical IRQ OCTEON_IRQ_MSI_BIT0 */
+ irq += OCTEON_IRQ_MSI_BIT0;
+
+ switch (octeon_dma_bar_type) {
+ case OCTEON_DMA_BAR_TYPE_SMALL:
+ /* When not using big bar, Bar 0 is based at 128MB */
+ msg.address_lo =
+ ((128ul << 20) + CVMX_PCI_MSI_RCV) & 0xffffffff;
+ msg.address_hi = ((128ul << 20) + CVMX_PCI_MSI_RCV) >> 32;
+ case OCTEON_DMA_BAR_TYPE_BIG:
+ /* When using big bar, Bar 0 is based at 0 */
+ msg.address_lo = (0 + CVMX_PCI_MSI_RCV) & 0xffffffff;
+ msg.address_hi = (0 + CVMX_PCI_MSI_RCV) >> 32;
+ break;
+ case OCTEON_DMA_BAR_TYPE_PCIE:
+ /* When using PCIe, Bar 0 is based at 0 */
+ /* FIXME CVMX_NPEI_MSI_RCV* other than 0? */
+ msg.address_lo = (0 + CVMX_NPEI_PCIE_MSI_RCV) & 0xffffffff;
+ msg.address_hi = (0 + CVMX_NPEI_PCIE_MSI_RCV) >> 32;
+ break;
+ default:
+ panic("arch_setup_msi_irq: Invalid octeon_dma_bar_type\n");
+ }
+ msg.data = irq - OCTEON_IRQ_MSI_BIT0;
+
+ /* Update the number of IRQs the device has available to it */
+ control &= ~PCI_MSI_FLAGS_QSIZE;
+ control |= request_private_bits << 4;
+ pci_write_config_word(dev, desc->msi_attrib.pos + PCI_MSI_FLAGS,
+ control);
+
+ set_irq_msi(irq, desc);
+ write_msi_msg(irq, &msg);
+ return 0;
+}
+
+
+/**
+ * Called when a device no longer needs its MSI interrupts. All
+ * MSI interrupts for the device are freed.
+ *
+ * @irq: The devices first irq number. There may be multple in sequence.
+ */
+void arch_teardown_msi_irq(unsigned int irq)
+{
+ int number_irqs;
+ uint64_t bitmask;
+
+ if ((irq < OCTEON_IRQ_MSI_BIT0) || (irq > OCTEON_IRQ_MSI_BIT63))
+ panic("arch_teardown_msi_irq: Attempted to teardown illegal "
+ "MSI interrupt (%d)", irq);
+ irq -= OCTEON_IRQ_MSI_BIT0;
+
+ /*
+ * Count the number of IRQs we need to free by looking at the
+ * msi_multiple_irq_bitmask. Each bit set means that the next
+ * IRQ is also owned by this device.
+ */
+ number_irqs = 0;
+ while ((irq+number_irqs < 64) &&
+ (msi_multiple_irq_bitmask & (1ull << (irq + number_irqs))))
+ number_irqs++;
+ number_irqs++;
+ /* Mask with one bit for each IRQ */
+ bitmask = (1 << number_irqs) - 1;
+ /* Shift the mask to the correct bit location */
+ bitmask <<= irq;
+ if ((msi_free_irq_bitmask & bitmask) != bitmask)
+ panic("arch_teardown_msi_irq: Attempted to teardown MSI "
+ "interrupt (%d) not in use", irq);
+
+ /* Checks are done, update the in use bitmask */
+ spin_lock(&msi_free_irq_bitmask_lock);
+ msi_free_irq_bitmask &= ~bitmask;
+ msi_multiple_irq_bitmask &= ~bitmask;
+ spin_unlock(&msi_free_irq_bitmask_lock);
+}
+
+
+/*
+ * Called by the interrupt handling code when an MSI interrupt
+ * occurs.
+ */
+static irqreturn_t octeon_msi_interrupt(int cpl, void *dev_id)
+{
+ uint64_t msi_bits;
+ int irq;
+
+ if (octeon_dma_bar_type == OCTEON_DMA_BAR_TYPE_PCIE)
+ msi_bits = cvmx_read_csr(CVMX_PEXP_NPEI_MSI_RCV0);
+ else
+ msi_bits = cvmx_read_csr(CVMX_NPI_NPI_MSI_RCV);
+ irq = fls64(msi_bits);
+ if (irq) {
+ irq += OCTEON_IRQ_MSI_BIT0 - 1;
+ if (irq_desc[irq].action) {
+ do_IRQ(irq);
+ return IRQ_HANDLED;
+ } else {
+ pr_err("Spurious MSI interrupt %d\n", irq);
+ if (octeon_has_feature(OCTEON_FEATURE_PCIE)) {
+ /* These chips have PCIe */
+ cvmx_write_csr(CVMX_PEXP_NPEI_MSI_RCV0,
+ 1ull << (irq -
+ OCTEON_IRQ_MSI_BIT0));
+ } else {
+ /* These chips have PCI */
+ cvmx_write_csr(CVMX_NPI_NPI_MSI_RCV,
+ 1ull << (irq -
+ OCTEON_IRQ_MSI_BIT0));
+ }
+ }
+ }
+ return IRQ_NONE;
+}
+
+
+/*
+ * Initializes the MSI interrupt handling code
+ */
+int octeon_msi_initialize(void)
+{
+ if (octeon_has_feature(OCTEON_FEATURE_PCIE)) {
+ if (request_irq(OCTEON_IRQ_PCI_MSI0, octeon_msi_interrupt,
+ IRQF_SHARED,
+ "MSI[0:63]", octeon_msi_interrupt))
+ panic("request_irq(OCTEON_IRQ_PCI_MSI0) failed");
+ } else if (octeon_is_pci_host()) {
+ if (request_irq(OCTEON_IRQ_PCI_MSI0, octeon_msi_interrupt,
+ IRQF_SHARED,
+ "MSI[0:15]", octeon_msi_interrupt))
+ panic("request_irq(OCTEON_IRQ_PCI_MSI0) failed");
+
+ if (request_irq(OCTEON_IRQ_PCI_MSI1, octeon_msi_interrupt,
+ IRQF_SHARED,
+ "MSI[16:31]", octeon_msi_interrupt))
+ panic("request_irq(OCTEON_IRQ_PCI_MSI1) failed");
+
+ if (request_irq(OCTEON_IRQ_PCI_MSI2, octeon_msi_interrupt,
+ IRQF_SHARED,
+ "MSI[32:47]", octeon_msi_interrupt))
+ panic("request_irq(OCTEON_IRQ_PCI_MSI2) failed");
+
+ if (request_irq(OCTEON_IRQ_PCI_MSI3, octeon_msi_interrupt,
+ IRQF_SHARED,
+ "MSI[48:63]", octeon_msi_interrupt))
+ panic("request_irq(OCTEON_IRQ_PCI_MSI3) failed");
+
+ }
+ return 0;
+}
+
+subsys_initcall(octeon_msi_initialize);
--- /dev/null
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2005-2009 Cavium Networks
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/time.h>
+#include <linux/delay.h>
+
+#include <asm/time.h>
+
+#include <asm/octeon/octeon.h>
+#include <asm/octeon/cvmx-npi-defs.h>
+#include <asm/octeon/cvmx-pci-defs.h>
+#include <asm/octeon/pci-octeon.h>
+
+#define USE_OCTEON_INTERNAL_ARBITER
+
+/*
+ * Octeon's PCI controller uses did=3, subdid=2 for PCI IO
+ * addresses. Use PCI endian swapping 1 so no address swapping is
+ * necessary. The Linux io routines will endian swap the data.
+ */
+#define OCTEON_PCI_IOSPACE_BASE 0x80011a0400000000ull
+#define OCTEON_PCI_IOSPACE_SIZE (1ull<<32)
+
+/* Octeon't PCI controller uses did=3, subdid=3 for PCI memory. */
+#define OCTEON_PCI_MEMSPACE_OFFSET (0x00011b0000000000ull)
+
+/**
+ * This is the bit decoding used for the Octeon PCI controller addresses
+ */
+union octeon_pci_address {
+ uint64_t u64;
+ struct {
+ uint64_t upper:2;
+ uint64_t reserved:13;
+ uint64_t io:1;
+ uint64_t did:5;
+ uint64_t subdid:3;
+ uint64_t reserved2:4;
+ uint64_t endian_swap:2;
+ uint64_t reserved3:10;
+ uint64_t bus:8;
+ uint64_t dev:5;
+ uint64_t func:3;
+ uint64_t reg:8;
+ } s;
+};
+
+int __initdata (*octeon_pcibios_map_irq)(const struct pci_dev *dev,
+ u8 slot, u8 pin);
+enum octeon_dma_bar_type octeon_dma_bar_type = OCTEON_DMA_BAR_TYPE_INVALID;
+
+/**
+ * Map a PCI device to the appropriate interrupt line
+ *
+ * @dev: The Linux PCI device structure for the device to map
+ * @slot: The slot number for this device on __BUS 0__. Linux
+ * enumerates through all the bridges and figures out the
+ * slot on Bus 0 where this device eventually hooks to.
+ * @pin: The PCI interrupt pin read from the device, then swizzled
+ * as it goes through each bridge.
+ * Returns Interrupt number for the device
+ */
+int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+ if (octeon_pcibios_map_irq)
+ return octeon_pcibios_map_irq(dev, slot, pin);
+ else
+ panic("octeon_pcibios_map_irq not set.");
+}
+
+
+/*
+ * Called to perform platform specific PCI setup
+ */
+int pcibios_plat_dev_init(struct pci_dev *dev)
+{
+ uint16_t config;
+ uint32_t dconfig;
+ int pos;
+ /*
+ * Force the Cache line setting to 64 bytes. The standard
+ * Linux bus scan doesn't seem to set it. Octeon really has
+ * 128 byte lines, but Intel bridges get really upset if you
+ * try and set values above 64 bytes. Value is specified in
+ * 32bit words.
+ */
+ pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 64 / 4);
+ /* Set latency timers for all devices */
+ pci_write_config_byte(dev, PCI_LATENCY_TIMER, 48);
+
+ /* Enable reporting System errors and parity errors on all devices */
+ /* Enable parity checking and error reporting */
+ pci_read_config_word(dev, PCI_COMMAND, &config);
+ config |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
+ pci_write_config_word(dev, PCI_COMMAND, config);
+
+ if (dev->subordinate) {
+ /* Set latency timers on sub bridges */
+ pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, 48);
+ /* More bridge error detection */
+ pci_read_config_word(dev, PCI_BRIDGE_CONTROL, &config);
+ config |= PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR;
+ pci_write_config_word(dev, PCI_BRIDGE_CONTROL, config);
+ }
+
+ /* Enable the PCIe normal error reporting */
+ pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
+ if (pos) {
+ /* Update Device Control */
+ pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &config);
+ /* Correctable Error Reporting */
+ config |= PCI_EXP_DEVCTL_CERE;
+ /* Non-Fatal Error Reporting */
+ config |= PCI_EXP_DEVCTL_NFERE;
+ /* Fatal Error Reporting */
+ config |= PCI_EXP_DEVCTL_FERE;
+ /* Unsupported Request */
+ config |= PCI_EXP_DEVCTL_URRE;
+ pci_write_config_word(dev, pos + PCI_EXP_DEVCTL, config);
+ }
+
+ /* Find the Advanced Error Reporting capability */
+ pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR);
+ if (pos) {
+ /* Clear Uncorrectable Error Status */
+ pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,
+ &dconfig);
+ pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS,
+ dconfig);
+ /* Enable reporting of all uncorrectable errors */
+ /* Uncorrectable Error Mask - turned on bits disable errors */
+ pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_MASK, 0);
+ /*
+ * Leave severity at HW default. This only controls if
+ * errors are reported as uncorrectable or
+ * correctable, not if the error is reported.
+ */
+ /* PCI_ERR_UNCOR_SEVER - Uncorrectable Error Severity */
+ /* Clear Correctable Error Status */
+ pci_read_config_dword(dev, pos + PCI_ERR_COR_STATUS, &dconfig);
+ pci_write_config_dword(dev, pos + PCI_ERR_COR_STATUS, dconfig);
+ /* Enable reporting of all correctable errors */
+ /* Correctable Error Mask - turned on bits disable errors */
+ pci_write_config_dword(dev, pos + PCI_ERR_COR_MASK, 0);
+ /* Advanced Error Capabilities */
+ pci_read_config_dword(dev, pos + PCI_ERR_CAP, &dconfig);
+ /* ECRC Generation Enable */
+ if (config & PCI_ERR_CAP_ECRC_GENC)
+ config |= PCI_ERR_CAP_ECRC_GENE;
+ /* ECRC Check Enable */
+ if (config & PCI_ERR_CAP_ECRC_CHKC)
+ config |= PCI_ERR_CAP_ECRC_CHKE;
+ pci_write_config_dword(dev, pos + PCI_ERR_CAP, dconfig);
+ /* PCI_ERR_HEADER_LOG - Header Log Register (16 bytes) */
+ /* Report all errors to the root complex */
+ pci_write_config_dword(dev, pos + PCI_ERR_ROOT_COMMAND,
+ PCI_ERR_ROOT_CMD_COR_EN |
+ PCI_ERR_ROOT_CMD_NONFATAL_EN |
+ PCI_ERR_ROOT_CMD_FATAL_EN);
+ /* Clear the Root status register */
+ pci_read_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, &dconfig);
+ pci_write_config_dword(dev, pos + PCI_ERR_ROOT_STATUS, dconfig);
+ }
+
+ return 0;
+}
+
+/**
+ * Return the mapping of PCI device number to IRQ line. Each
+ * character in the return string represents the interrupt
+ * line for the device at that position. Device 1 maps to the
+ * first character, etc. The characters A-D are used for PCI
+ * interrupts.
+ *
+ * Returns PCI interrupt mapping
+ */
+const char *octeon_get_pci_interrupts(void)
+{
+ /*
+ * Returning an empty string causes the interrupts to be
+ * routed based on the PCI specification. From the PCI spec:
+ *
+ * INTA# of Device Number 0 is connected to IRQW on the system
+ * board. (Device Number has no significance regarding being
+ * located on the system board or in a connector.) INTA# of
+ * Device Number 1 is connected to IRQX on the system
+ * board. INTA# of Device Number 2 is connected to IRQY on the
+ * system board. INTA# of Device Number 3 is connected to IRQZ
+ * on the system board. The table below describes how each
+ * agent's INTx# lines are connected to the system board
+ * interrupt lines. The following equation can be used to
+ * determine to which INTx# signal on the system board a given
+ * device's INTx# line(s) is connected.
+ *
+ * MB = (D + I) MOD 4 MB = System board Interrupt (IRQW = 0,
+ * IRQX = 1, IRQY = 2, and IRQZ = 3) D = Device Number I =
+ * Interrupt Number (INTA# = 0, INTB# = 1, INTC# = 2, and
+ * INTD# = 3)
+ */
+ switch (octeon_bootinfo->board_type) {
+ case CVMX_BOARD_TYPE_NAO38:
+ /* This is really the NAC38 */
+ return "AAAAADABAAAAAAAAAAAAAAAAAAAAAAAA";
+ case CVMX_BOARD_TYPE_THUNDER:
+ return "";
+ case CVMX_BOARD_TYPE_EBH3000:
+ return "";
+ case CVMX_BOARD_TYPE_EBH3100:
+ case CVMX_BOARD_TYPE_CN3010_EVB_HS5:
+ case CVMX_BOARD_TYPE_CN3005_EVB_HS5:
+ return "AAABAAAAAAAAAAAAAAAAAAAAAAAAAAAA";
+ case CVMX_BOARD_TYPE_BBGW_REF:
+ return "AABCD";
+ default:
+ return "";
+ }
+}
+
+/**
+ * Map a PCI device to the appropriate interrupt line
+ *
+ * @dev: The Linux PCI device structure for the device to map
+ * @slot: The slot number for this device on __BUS 0__. Linux
+ * enumerates through all the bridges and figures out the
+ * slot on Bus 0 where this device eventually hooks to.
+ * @pin: The PCI interrupt pin read from the device, then swizzled
+ * as it goes through each bridge.
+ * Returns Interrupt number for the device
+ */
+int __init octeon_pci_pcibios_map_irq(const struct pci_dev *dev,
+ u8 slot, u8 pin)
+{
+ int irq_num;
+ const char *interrupts;
+ int dev_num;
+
+ /* Get the board specific interrupt mapping */
+ interrupts = octeon_get_pci_interrupts();
+
+ dev_num = dev->devfn >> 3;
+ if (dev_num < strlen(interrupts))
+ irq_num = ((interrupts[dev_num] - 'A' + pin - 1) & 3) +
+ OCTEON_IRQ_PCI_INT0;
+ else
+ irq_num = ((slot + pin - 3) & 3) + OCTEON_IRQ_PCI_INT0;
+ return irq_num;
+}
+
+
+/*
+ * Read a value from configuration space
+ */
+static int octeon_read_config(struct pci_bus *bus, unsigned int devfn,
+ int reg, int size, u32 *val)
+{
+ union octeon_pci_address pci_addr;
+
+ pci_addr.u64 = 0;
+ pci_addr.s.upper = 2;
+ pci_addr.s.io = 1;
+ pci_addr.s.did = 3;
+ pci_addr.s.subdid = 1;
+ pci_addr.s.endian_swap = 1;
+ pci_addr.s.bus = bus->number;
+ pci_addr.s.dev = devfn >> 3;
+ pci_addr.s.func = devfn & 0x7;
+ pci_addr.s.reg = reg;
+
+#if PCI_CONFIG_SPACE_DELAY
+ udelay(PCI_CONFIG_SPACE_DELAY);
+#endif
+ switch (size) {
+ case 4:
+ *val = le32_to_cpu(cvmx_read64_uint32(pci_addr.u64));
+ return PCIBIOS_SUCCESSFUL;
+ case 2:
+ *val = le16_to_cpu(cvmx_read64_uint16(pci_addr.u64));
+ return PCIBIOS_SUCCESSFUL;
+ case 1:
+ *val = cvmx_read64_uint8(pci_addr.u64);
+ return PCIBIOS_SUCCESSFUL;
+ }
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
+}
+
+
+/*
+ * Write a value to PCI configuration space
+ */
+static int octeon_write_config(struct pci_bus *bus, unsigned int devfn,
+ int reg, int size, u32 val)
+{
+ union octeon_pci_address pci_addr;
+
+ pci_addr.u64 = 0;
+ pci_addr.s.upper = 2;
+ pci_addr.s.io = 1;
+ pci_addr.s.did = 3;
+ pci_addr.s.subdid = 1;
+ pci_addr.s.endian_swap = 1;
+ pci_addr.s.bus = bus->number;
+ pci_addr.s.dev = devfn >> 3;
+ pci_addr.s.func = devfn & 0x7;
+ pci_addr.s.reg = reg;
+
+#if PCI_CONFIG_SPACE_DELAY
+ udelay(PCI_CONFIG_SPACE_DELAY);
+#endif
+ switch (size) {
+ case 4:
+ cvmx_write64_uint32(pci_addr.u64, cpu_to_le32(val));
+ return PCIBIOS_SUCCESSFUL;
+ case 2:
+ cvmx_write64_uint16(pci_addr.u64, cpu_to_le16(val));
+ return PCIBIOS_SUCCESSFUL;
+ case 1:
+ cvmx_write64_uint8(pci_addr.u64, val);
+ return PCIBIOS_SUCCESSFUL;
+ }
+ return PCIBIOS_FUNC_NOT_SUPPORTED;
+}
+
+
+static struct pci_ops octeon_pci_ops = {
+ octeon_read_config,
+ octeon_write_config,
+};
+
+static struct resource octeon_pci_mem_resource = {
+ .start = 0,
+ .end = 0,
+ .name = "Octeon PCI MEM",
+ .flags = IORESOURCE_MEM,
+};
+
+/*
+ * PCI ports must be above 16KB so the ISA bus filtering in the PCI-X to PCI
+ * bridge
+ */
+static struct resource octeon_pci_io_resource = {
+ .start = 0x4000,
+ .end = OCTEON_PCI_IOSPACE_SIZE - 1,
+ .name = "Octeon PCI IO",
+ .flags = IORESOURCE_IO,
+};
+
+static struct pci_controller octeon_pci_controller = {
+ .pci_ops = &octeon_pci_ops,
+ .mem_resource = &octeon_pci_mem_resource,
+ .mem_offset = OCTEON_PCI_MEMSPACE_OFFSET,
+ .io_resource = &octeon_pci_io_resource,
+ .io_offset = 0,
+ .io_map_base = OCTEON_PCI_IOSPACE_BASE,
+};
+
+
+/*
+ * Low level initialize the Octeon PCI controller
+ */
+static void octeon_pci_initialize(void)
+{
+ union cvmx_pci_cfg01 cfg01;
+ union cvmx_npi_ctl_status ctl_status;
+ union cvmx_pci_ctl_status_2 ctl_status_2;
+ union cvmx_pci_cfg19 cfg19;
+ union cvmx_pci_cfg16 cfg16;
+ union cvmx_pci_cfg22 cfg22;
+ union cvmx_pci_cfg56 cfg56;
+
+ /* Reset the PCI Bus */
+ cvmx_write_csr(CVMX_CIU_SOFT_PRST, 0x1);
+ cvmx_read_csr(CVMX_CIU_SOFT_PRST);
+
+ udelay(2000); /* Hold PCI reset for 2 ms */
+
+ ctl_status.u64 = 0; /* cvmx_read_csr(CVMX_NPI_CTL_STATUS); */
+ ctl_status.s.max_word = 1;
+ ctl_status.s.timer = 1;
+ cvmx_write_csr(CVMX_NPI_CTL_STATUS, ctl_status.u64);
+
+ /* Deassert PCI reset and advertize PCX Host Mode Device Capability
+ (64b) */
+ cvmx_write_csr(CVMX_CIU_SOFT_PRST, 0x4);
+ cvmx_read_csr(CVMX_CIU_SOFT_PRST);
+
+ udelay(2000); /* Wait 2 ms after deasserting PCI reset */
+
+ ctl_status_2.u32 = 0;
+ ctl_status_2.s.tsr_hwm = 1; /* Initializes to 0. Must be set
+ before any PCI reads. */
+ ctl_status_2.s.bar2pres = 1; /* Enable BAR2 */
+ ctl_status_2.s.bar2_enb = 1;
+ ctl_status_2.s.bar2_cax = 1; /* Don't use L2 */
+ ctl_status_2.s.bar2_esx = 1;
+ ctl_status_2.s.pmo_amod = 1; /* Round robin priority */
+ if (octeon_dma_bar_type == OCTEON_DMA_BAR_TYPE_BIG) {
+ /* BAR1 hole */
+ ctl_status_2.s.bb1_hole = OCTEON_PCI_BAR1_HOLE_BITS;
+ ctl_status_2.s.bb1_siz = 1; /* BAR1 is 2GB */
+ ctl_status_2.s.bb_ca = 1; /* Don't use L2 with big bars */
+ ctl_status_2.s.bb_es = 1; /* Big bar in byte swap mode */
+ ctl_status_2.s.bb1 = 1; /* BAR1 is big */
+ ctl_status_2.s.bb0 = 1; /* BAR0 is big */
+ }
+
+ octeon_npi_write32(CVMX_NPI_PCI_CTL_STATUS_2, ctl_status_2.u32);
+ udelay(2000); /* Wait 2 ms before doing PCI reads */
+
+ ctl_status_2.u32 = octeon_npi_read32(CVMX_NPI_PCI_CTL_STATUS_2);
+ pr_notice("PCI Status: %s %s-bit\n",
+ ctl_status_2.s.ap_pcix ? "PCI-X" : "PCI",
+ ctl_status_2.s.ap_64ad ? "64" : "32");
+
+ if (OCTEON_IS_MODEL(OCTEON_CN58XX) || OCTEON_IS_MODEL(OCTEON_CN50XX)) {
+ union cvmx_pci_cnt_reg cnt_reg_start;
+ union cvmx_pci_cnt_reg cnt_reg_end;
+ unsigned long cycles, pci_clock;
+
+ cnt_reg_start.u64 = cvmx_read_csr(CVMX_NPI_PCI_CNT_REG);
+ cycles = read_c0_cvmcount();
+ udelay(1000);
+ cnt_reg_end.u64 = cvmx_read_csr(CVMX_NPI_PCI_CNT_REG);
+ cycles = read_c0_cvmcount() - cycles;
+ pci_clock = (cnt_reg_end.s.pcicnt - cnt_reg_start.s.pcicnt) /
+ (cycles / (mips_hpt_frequency / 1000000));
+ pr_notice("PCI Clock: %lu MHz\n", pci_clock);
+ }
+
+ /*
+ * TDOMC must be set to one in PCI mode. TDOMC should be set to 4
+ * in PCI-X mode to allow four oustanding splits. Otherwise,
+ * should not change from its reset value. Don't write PCI_CFG19
+ * in PCI mode (0x82000001 reset value), write it to 0x82000004
+ * after PCI-X mode is known. MRBCI,MDWE,MDRE -> must be zero.
+ * MRBCM -> must be one.
+ */
+ if (ctl_status_2.s.ap_pcix) {
+ cfg19.u32 = 0;
+ /*
+ * Target Delayed/Split request outstanding maximum
+ * count. [1..31] and 0=32. NOTE: If the user
+ * programs these bits beyond the Designed Maximum
+ * outstanding count, then the designed maximum table
+ * depth will be used instead. No additional
+ * Deferred/Split transactions will be accepted if
+ * this outstanding maximum count is
+ * reached. Furthermore, no additional deferred/split
+ * transactions will be accepted if the I/O delay/ I/O
+ * Split Request outstanding maximum is reached.
+ */
+ cfg19.s.tdomc = 4;
+ /*
+ * Master Deferred Read Request Outstanding Max Count
+ * (PCI only). CR4C[26:24] Max SAC cycles MAX DAC
+ * cycles 000 8 4 001 1 0 010 2 1 011 3 1 100 4 2 101
+ * 5 2 110 6 3 111 7 3 For example, if these bits are
+ * programmed to 100, the core can support 2 DAC
+ * cycles, 4 SAC cycles or a combination of 1 DAC and
+ * 2 SAC cycles. NOTE: For the PCI-X maximum
+ * outstanding split transactions, refer to
+ * CRE0[22:20].
+ */
+ cfg19.s.mdrrmc = 2;
+ /*
+ * Master Request (Memory Read) Byte Count/Byte Enable
+ * select. 0 = Byte Enables valid. In PCI mode, a
+ * burst transaction cannot be performed using Memory
+ * Read command=4?h6. 1 = DWORD Byte Count valid
+ * (default). In PCI Mode, the memory read byte
+ * enables are automatically generated by the
+ * core. Note: N3 Master Request transaction sizes are
+ * always determined through the
+ * am_attr[<35:32>|<7:0>] field.
+ */
+ cfg19.s.mrbcm = 1;
+ octeon_npi_write32(CVMX_NPI_PCI_CFG19, cfg19.u32);
+ }
+
+
+ cfg01.u32 = 0;
+ cfg01.s.msae = 1; /* Memory Space Access Enable */
+ cfg01.s.me = 1; /* Master Enable */
+ cfg01.s.pee = 1; /* PERR# Enable */
+ cfg01.s.see = 1; /* System Error Enable */
+ cfg01.s.fbbe = 1; /* Fast Back to Back Transaction Enable */
+
+ octeon_npi_write32(CVMX_NPI_PCI_CFG01, cfg01.u32);
+
+#ifdef USE_OCTEON_INTERNAL_ARBITER
+ /*
+ * When OCTEON is a PCI host, most systems will use OCTEON's
+ * internal arbiter, so must enable it before any PCI/PCI-X
+ * traffic can occur.
+ */
+ {
+ union cvmx_npi_pci_int_arb_cfg pci_int_arb_cfg;
+
+ pci_int_arb_cfg.u64 = 0;
+ pci_int_arb_cfg.s.en = 1; /* Internal arbiter enable */
+ cvmx_write_csr(CVMX_NPI_PCI_INT_ARB_CFG, pci_int_arb_cfg.u64);
+ }
+#endif /* USE_OCTEON_INTERNAL_ARBITER */
+
+ /*
+ * Preferrably written to 1 to set MLTD. [RDSATI,TRTAE,
+ * TWTAE,TMAE,DPPMR -> must be zero. TILT -> must not be set to
+ * 1..7.
+ */
+ cfg16.u32 = 0;
+ cfg16.s.mltd = 1; /* Master Latency Timer Disable */
+ octeon_npi_write32(CVMX_NPI_PCI_CFG16, cfg16.u32);
+
+ /*
+ * Should be written to 0x4ff00. MTTV -> must be zero.
+ * FLUSH -> must be 1. MRV -> should be 0xFF.
+ */
+ cfg22.u32 = 0;
+ /* Master Retry Value [1..255] and 0=infinite */
+ cfg22.s.mrv = 0xff;
+ /*
+ * AM_DO_FLUSH_I control NOTE: This bit MUST BE ONE for proper
+ * N3K operation.
+ */
+ cfg22.s.flush = 1;
+ octeon_npi_write32(CVMX_NPI_PCI_CFG22, cfg22.u32);
+
+ /*
+ * MOST Indicates the maximum number of outstanding splits (in -1
+ * notation) when OCTEON is in PCI-X mode. PCI-X performance is
+ * affected by the MOST selection. Should generally be written
+ * with one of 0x3be807, 0x2be807, 0x1be807, or 0x0be807,
+ * depending on the desired MOST of 3, 2, 1, or 0, respectively.
+ */
+ cfg56.u32 = 0;
+ cfg56.s.pxcid = 7; /* RO - PCI-X Capability ID */
+ cfg56.s.ncp = 0xe8; /* RO - Next Capability Pointer */
+ cfg56.s.dpere = 1; /* Data Parity Error Recovery Enable */
+ cfg56.s.roe = 1; /* Relaxed Ordering Enable */
+ cfg56.s.mmbc = 1; /* Maximum Memory Byte Count
+ [0=512B,1=1024B,2=2048B,3=4096B] */
+ cfg56.s.most = 3; /* Maximum outstanding Split transactions [0=1
+ .. 7=32] */
+
+ octeon_npi_write32(CVMX_NPI_PCI_CFG56, cfg56.u32);
+
+ /*
+ * Affects PCI performance when OCTEON services reads to its
+ * BAR1/BAR2. Refer to Section 10.6.1. The recommended values are
+ * 0x22, 0x33, and 0x33 for PCI_READ_CMD_6, PCI_READ_CMD_C, and
+ * PCI_READ_CMD_E, respectively. Unfortunately due to errata DDR-700,
+ * these values need to be changed so they won't possibly prefetch off
+ * of the end of memory if PCI is DMAing a buffer at the end of
+ * memory. Note that these values differ from their reset values.
+ */
+ octeon_npi_write32(CVMX_NPI_PCI_READ_CMD_6, 0x21);
+ octeon_npi_write32(CVMX_NPI_PCI_READ_CMD_C, 0x31);
+ octeon_npi_write32(CVMX_NPI_PCI_READ_CMD_E, 0x31);
+}
+
+
+/*
+ * Initialize the Octeon PCI controller
+ */
+static int __init octeon_pci_setup(void)
+{
+ union cvmx_npi_mem_access_subidx mem_access;
+ int index;
+
+ /* Only these chips have PCI */
+ if (octeon_has_feature(OCTEON_FEATURE_PCIE))
+ return 0;
+
+ /* Point pcibios_map_irq() to the PCI version of it */
+ octeon_pcibios_map_irq = octeon_pci_pcibios_map_irq;
+
+ /* Only use the big bars on chips that support it */
+ if (OCTEON_IS_MODEL(OCTEON_CN31XX) ||
+ OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2) ||
+ OCTEON_IS_MODEL(OCTEON_CN38XX_PASS1))
+ octeon_dma_bar_type = OCTEON_DMA_BAR_TYPE_SMALL;
+ else
+ octeon_dma_bar_type = OCTEON_DMA_BAR_TYPE_BIG;
+
+ /* PCI I/O and PCI MEM values */
+ set_io_port_base(OCTEON_PCI_IOSPACE_BASE);
+ ioport_resource.start = 0;
+ ioport_resource.end = OCTEON_PCI_IOSPACE_SIZE - 1;
+ if (!octeon_is_pci_host()) {
+ pr_notice("Not in host mode, PCI Controller not initialized\n");
+ return 0;
+ }
+
+ pr_notice("%s Octeon big bar support\n",
+ (octeon_dma_bar_type ==
+ OCTEON_DMA_BAR_TYPE_BIG) ? "Enabling" : "Disabling");
+
+ octeon_pci_initialize();
+
+ mem_access.u64 = 0;
+ mem_access.s.esr = 1; /* Endian-Swap on read. */
+ mem_access.s.esw = 1; /* Endian-Swap on write. */
+ mem_access.s.nsr = 0; /* No-Snoop on read. */
+ mem_access.s.nsw = 0; /* No-Snoop on write. */
+ mem_access.s.ror = 0; /* Relax Read on read. */
+ mem_access.s.row = 0; /* Relax Order on write. */
+ mem_access.s.ba = 0; /* PCI Address bits [63:36]. */
+ cvmx_write_csr(CVMX_NPI_MEM_ACCESS_SUBID3, mem_access.u64);
+
+ /*
+ * Remap the Octeon BAR 2 above all 32 bit devices
+ * (0x8000000000ul). This is done here so it is remapped
+ * before the readl()'s below. We don't want BAR2 overlapping
+ * with BAR0/BAR1 during these reads.
+ */
+ octeon_npi_write32(CVMX_NPI_PCI_CFG08, 0);
+ octeon_npi_write32(CVMX_NPI_PCI_CFG09, 0x80);
+
+ /* Disable the BAR1 movable mappings */
+ for (index = 0; index < 32; index++)
+ octeon_npi_write32(CVMX_NPI_PCI_BAR1_INDEXX(index), 0);
+
+ if (octeon_dma_bar_type == OCTEON_DMA_BAR_TYPE_BIG) {
+ /* Remap the Octeon BAR 0 to 0-2GB */
+ octeon_npi_write32(CVMX_NPI_PCI_CFG04, 0);
+ octeon_npi_write32(CVMX_NPI_PCI_CFG05, 0);
+
+ /*
+ * Remap the Octeon BAR 1 to map 2GB-4GB (minus the
+ * BAR 1 hole).
+ */
+ octeon_npi_write32(CVMX_NPI_PCI_CFG06, 2ul << 30);
+ octeon_npi_write32(CVMX_NPI_PCI_CFG07, 0);
+
+ /* Devices go after BAR1 */
+ octeon_pci_mem_resource.start =
+ OCTEON_PCI_MEMSPACE_OFFSET + (4ul << 30) -
+ (OCTEON_PCI_BAR1_HOLE_SIZE << 20);
+ octeon_pci_mem_resource.end =
+ octeon_pci_mem_resource.start + (1ul << 30);
+ } else {
+ /* Remap the Octeon BAR 0 to map 128MB-(128MB+4KB) */
+ octeon_npi_write32(CVMX_NPI_PCI_CFG04, 128ul << 20);
+ octeon_npi_write32(CVMX_NPI_PCI_CFG05, 0);
+
+ /* Remap the Octeon BAR 1 to map 0-128MB */
+ octeon_npi_write32(CVMX_NPI_PCI_CFG06, 0);
+ octeon_npi_write32(CVMX_NPI_PCI_CFG07, 0);
+
+ /* Devices go after BAR0 */
+ octeon_pci_mem_resource.start =
+ OCTEON_PCI_MEMSPACE_OFFSET + (128ul << 20) +
+ (4ul << 10);
+ octeon_pci_mem_resource.end =
+ octeon_pci_mem_resource.start + (1ul << 30);
+ }
+
+ register_pci_controller(&octeon_pci_controller);
+
+ /*
+ * Clear any errors that might be pending from before the bus
+ * was setup properly.
+ */
+ cvmx_write_csr(CVMX_NPI_PCI_INT_SUM2, -1);
+ return 0;
+}
+
+arch_initcall(octeon_pci_setup);
--- /dev/null
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2007, 2008 Cavium Networks
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/time.h>
+#include <linux/delay.h>
+
+#include <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-helper-errata.h>
+#include <asm/octeon/pci-octeon.h>
+
+union cvmx_pcie_address {
+ uint64_t u64;
+ struct {
+ uint64_t upper:2; /* Normally 2 for XKPHYS */
+ uint64_t reserved_49_61:13; /* Must be zero */
+ uint64_t io:1; /* 1 for IO space access */
+ uint64_t did:5; /* PCIe DID = 3 */
+ uint64_t subdid:3; /* PCIe SubDID = 1 */
+ uint64_t reserved_36_39:4; /* Must be zero */
+ uint64_t es:2; /* Endian swap = 1 */
+ uint64_t port:2; /* PCIe port 0,1 */
+ uint64_t reserved_29_31:3; /* Must be zero */
+ /*
+ * Selects the type of the configuration request (0 = type 0,
+ * 1 = type 1).
+ */
+ uint64_t ty:1;
+ /* Target bus number sent in the ID in the request. */
+ uint64_t bus:8;
+ /*
+ * Target device number sent in the ID in the
+ * request. Note that Dev must be zero for type 0
+ * configuration requests.
+ */
+ uint64_t dev:5;
+ /* Target function number sent in the ID in the request. */
+ uint64_t func:3;
+ /*
+ * Selects a register in the configuration space of
+ * the target.
+ */
+ uint64_t reg:12;
+ } config;
+ struct {
+ uint64_t upper:2; /* Normally 2 for XKPHYS */
+ uint64_t reserved_49_61:13; /* Must be zero */
+ uint64_t io:1; /* 1 for IO space access */
+ uint64_t did:5; /* PCIe DID = 3 */
+ uint64_t subdid:3; /* PCIe SubDID = 2 */
+ uint64_t reserved_36_39:4; /* Must be zero */
+ uint64_t es:2; /* Endian swap = 1 */
+ uint64_t port:2; /* PCIe port 0,1 */
+ uint64_t address:32; /* PCIe IO address */
+ } io;
+ struct {
+ uint64_t upper:2; /* Normally 2 for XKPHYS */
+ uint64_t reserved_49_61:13; /* Must be zero */
+ uint64_t io:1; /* 1 for IO space access */
+ uint64_t did:5; /* PCIe DID = 3 */
+ uint64_t subdid:3; /* PCIe SubDID = 3-6 */
+ uint64_t reserved_36_39:4; /* Must be zero */
+ uint64_t address:36; /* PCIe Mem address */
+ } mem;
+};
+
+/**
+ * Return the Core virtual base address for PCIe IO access. IOs are
+ * read/written as an offset from this address.
+ *
+ * @pcie_port: PCIe port the IO is for
+ *
+ * Returns 64bit Octeon IO base address for read/write
+ */
+static inline uint64_t cvmx_pcie_get_io_base_address(int pcie_port)
+{
+ union cvmx_pcie_address pcie_addr;
+ pcie_addr.u64 = 0;
+ pcie_addr.io.upper = 0;
+ pcie_addr.io.io = 1;
+ pcie_addr.io.did = 3;
+ pcie_addr.io.subdid = 2;
+ pcie_addr.io.es = 1;
+ pcie_addr.io.port = pcie_port;
+ return pcie_addr.u64;
+}
+
+/**
+ * Size of the IO address region returned at address
+ * cvmx_pcie_get_io_base_address()
+ *
+ * @pcie_port: PCIe port the IO is for
+ *
+ * Returns Size of the IO window
+ */
+static inline uint64_t cvmx_pcie_get_io_size(int pcie_port)
+{
+ return 1ull << 32;
+}
+
+/**
+ * Return the Core virtual base address for PCIe MEM access. Memory is
+ * read/written as an offset from this address.
+ *
+ * @pcie_port: PCIe port the IO is for
+ *
+ * Returns 64bit Octeon IO base address for read/write
+ */
+static inline uint64_t cvmx_pcie_get_mem_base_address(int pcie_port)
+{
+ union cvmx_pcie_address pcie_addr;
+ pcie_addr.u64 = 0;
+ pcie_addr.mem.upper = 0;
+ pcie_addr.mem.io = 1;
+ pcie_addr.mem.did = 3;
+ pcie_addr.mem.subdid = 3 + pcie_port;
+ return pcie_addr.u64;
+}
+
+/**
+ * Size of the Mem address region returned at address
+ * cvmx_pcie_get_mem_base_address()
+ *
+ * @pcie_port: PCIe port the IO is for
+ *
+ * Returns Size of the Mem window
+ */
+static inline uint64_t cvmx_pcie_get_mem_size(int pcie_port)
+{
+ return 1ull << 36;
+}
+
+/**
+ * Read a PCIe config space register indirectly. This is used for
+ * registers of the form PCIEEP_CFG??? and PCIERC?_CFG???.
+ *
+ * @pcie_port: PCIe port to read from
+ * @cfg_offset: Address to read
+ *
+ * Returns Value read
+ */
+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;
+}
+
+/**
+ * Write a PCIe config space register indirectly. This is used for
+ * registers of the form PCIEEP_CFG??? and PCIERC?_CFG???.
+ *
+ * @pcie_port: PCIe port to write to
+ * @cfg_offset: Address to write
+ * @val: Value to write
+ */
+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);
+}
+
+/**
+ * Build a PCIe config space request address for a device
+ *
+ * @pcie_port: PCIe port to access
+ * @bus: Sub bus
+ * @dev: Device ID
+ * @fn: Device sub function
+ * @reg: Register to access
+ *
+ * Returns 64bit Octeon IO address
+ */
+static inline uint64_t __cvmx_pcie_build_config_addr(int pcie_port, int bus,
+ int dev, int fn, int reg)
+{
+ union cvmx_pcie_address pcie_addr;
+ union cvmx_pciercx_cfg006 pciercx_cfg006;
+
+ pciercx_cfg006.u32 =
+ cvmx_pcie_cfgx_read(pcie_port, CVMX_PCIERCX_CFG006(pcie_port));
+ if ((bus <= pciercx_cfg006.s.pbnum) && (dev != 0))
+ return 0;
+
+ pcie_addr.u64 = 0;
+ pcie_addr.config.upper = 2;
+ pcie_addr.config.io = 1;
+ pcie_addr.config.did = 3;
+ pcie_addr.config.subdid = 1;
+ pcie_addr.config.es = 1;
+ pcie_addr.config.port = pcie_port;
+ pcie_addr.config.ty = (bus > pciercx_cfg006.s.pbnum);
+ pcie_addr.config.bus = bus;
+ pcie_addr.config.dev = dev;
+ pcie_addr.config.func = fn;
+ pcie_addr.config.reg = reg;
+ return pcie_addr.u64;
+}
+
+/**
+ * Read 8bits from a Device's config space
+ *
+ * @pcie_port: PCIe port the device is on
+ * @bus: Sub bus
+ * @dev: Device ID
+ * @fn: Device sub function
+ * @reg: Register to access
+ *
+ * Returns Result of the read
+ */
+static uint8_t cvmx_pcie_config_read8(int pcie_port, int bus, int dev,
+ int fn, int reg)
+{
+ uint64_t address =
+ __cvmx_pcie_build_config_addr(pcie_port, bus, dev, fn, reg);
+ if (address)
+ return cvmx_read64_uint8(address);
+ else
+ return 0xff;
+}
+
+/**
+ * Read 16bits from a Device's config space
+ *
+ * @pcie_port: PCIe port the device is on
+ * @bus: Sub bus
+ * @dev: Device ID
+ * @fn: Device sub function
+ * @reg: Register to access
+ *
+ * Returns Result of the read
+ */
+static uint16_t cvmx_pcie_config_read16(int pcie_port, int bus, int dev,
+ int fn, int reg)
+{
+ uint64_t address =
+ __cvmx_pcie_build_config_addr(pcie_port, bus, dev, fn, reg);
+ if (address)
+ return le16_to_cpu(cvmx_read64_uint16(address));
+ else
+ return 0xffff;
+}
+
+/**
+ * Read 32bits from a Device's config space
+ *
+ * @pcie_port: PCIe port the device is on
+ * @bus: Sub bus
+ * @dev: Device ID
+ * @fn: Device sub function
+ * @reg: Register to access
+ *
+ * Returns Result of the read
+ */
+static uint32_t cvmx_pcie_config_read32(int pcie_port, int bus, int dev,
+ int fn, int reg)
+{
+ uint64_t address =
+ __cvmx_pcie_build_config_addr(pcie_port, bus, dev, fn, reg);
+ if (address)
+ return le32_to_cpu(cvmx_read64_uint32(address));
+ else
+ return 0xffffffff;
+}
+
+/**
+ * Write 8bits to a Device's config space
+ *
+ * @pcie_port: PCIe port the device is on
+ * @bus: Sub bus
+ * @dev: Device ID
+ * @fn: Device sub function
+ * @reg: Register to access
+ * @val: Value to write
+ */
+static void cvmx_pcie_config_write8(int pcie_port, int bus, int dev, int fn,
+ int reg, uint8_t val)
+{
+ uint64_t address =
+ __cvmx_pcie_build_config_addr(pcie_port, bus, dev, fn, reg);
+ if (address)
+ cvmx_write64_uint8(address, val);
+}
+
+/**
+ * Write 16bits to a Device's config space
+ *
+ * @pcie_port: PCIe port the device is on
+ * @bus: Sub bus
+ * @dev: Device ID
+ * @fn: Device sub function
+ * @reg: Register to access
+ * @val: Value to write
+ */
+static void cvmx_pcie_config_write16(int pcie_port, int bus, int dev, int fn,
+ int reg, uint16_t val)
+{
+ uint64_t address =
+ __cvmx_pcie_build_config_addr(pcie_port, bus, dev, fn, reg);
+ if (address)
+ cvmx_write64_uint16(address, cpu_to_le16(val));
+}
+
+/**
+ * Write 32bits to a Device's config space
+ *
+ * @pcie_port: PCIe port the device is on
+ * @bus: Sub bus
+ * @dev: Device ID
+ * @fn: Device sub function
+ * @reg: Register to access
+ * @val: Value to write
+ */
+static void cvmx_pcie_config_write32(int pcie_port, int bus, int dev, int fn,
+ int reg, uint32_t val)
+{
+ uint64_t address =
+ __cvmx_pcie_build_config_addr(pcie_port, bus, dev, fn, reg);
+ if (address)
+ cvmx_write64_uint32(address, cpu_to_le32(val));
+}
+
+/**
+ * Initialize the RC config space CSRs
+ *
+ * @pcie_port: PCIe port to initialize
+ */
+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;
+ union cvmx_pciercx_cfg006 pciercx_cfg006;
+ union cvmx_pciercx_cfg008 pciercx_cfg008;
+ union cvmx_pciercx_cfg009 pciercx_cfg009;
+ union cvmx_pciercx_cfg010 pciercx_cfg010;
+ union cvmx_pciercx_cfg011 pciercx_cfg011;
+ union cvmx_pciercx_cfg035 pciercx_cfg035;
+ union cvmx_pciercx_cfg075 pciercx_cfg075;
+ union cvmx_pciercx_cfg034 pciercx_cfg034;
+
+ /* Max Payload Size (PCIE*_CFG030[MPS]) */
+ /* Max Read Request Size (PCIE*_CFG030[MRRS]) */
+ /* Relaxed-order, no-snoop enables (PCIE*_CFG030[RO_EN,NS_EN] */
+ /* Error Message Enables (PCIE*_CFG030[CE_EN,NFE_EN,FE_EN,UR_EN]) */
+ 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;
+ /*
+ * Max read request size = 128 bytes for best Octeon DMA
+ * performance.
+ */
+ pciercx_cfg030.s.mrrs = 0;
+ /* Enable relaxed ordering. */
+ pciercx_cfg030.s.ro_en = 1;
+ /* Enable no snoop. */
+ pciercx_cfg030.s.ns_en = 1;
+ /* Correctable error reporting enable. */
+ pciercx_cfg030.s.ce_en = 1;
+ /* Non-fatal error reporting enable. */
+ pciercx_cfg030.s.nfe_en = 1;
+ /* Fatal error reporting enable. */
+ pciercx_cfg030.s.fe_en = 1;
+ /* Unsupported request reporting enable. */
+ pciercx_cfg030.s.ur_en = 1;
+ cvmx_pcie_cfgx_write(pcie_port, CVMX_PCIERCX_CFG030(pcie_port),
+ pciercx_cfg030.u32);
+
+ /*
+ * Max Payload Size (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
+ *
+ * @dev: The Linux PCI device structure for the device to map
+ * @slot: The slot number for this device on __BUS 0__. Linux
+ * enumerates through all the bridges and figures out the
+ * slot on Bus 0 where this device eventually hooks to.
+ * @pin: The PCI interrupt pin read from the device, then swizzled
+ * as it goes through each bridge.
+ * Returns Interrupt number for the device
+ */
+int __init octeon_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
+ *
+ * @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)
+{
+ 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
+ *
+ * @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)
+{
+ 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
+ *
+ * Returns
+ */
+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);
projects / mirror_ubuntu-bionic-kernel.git / commitdiff