diff options
Diffstat (limited to 'arch/mips/cavium-octeon')
| -rw-r--r-- | arch/mips/cavium-octeon/Makefile | 4 | ||||
| -rw-r--r-- | arch/mips/cavium-octeon/dma-octeon.c | 2 | ||||
| -rw-r--r-- | arch/mips/cavium-octeon/msi.c | 288 | ||||
| -rw-r--r-- | arch/mips/cavium-octeon/pci-common.c | 137 | ||||
| -rw-r--r-- | arch/mips/cavium-octeon/pci-common.h | 39 | ||||
| -rw-r--r-- | arch/mips/cavium-octeon/pci.c | 568 | ||||
| -rw-r--r-- | arch/mips/cavium-octeon/pcie.c | 1370 |
7 files changed, 1 insertions, 2407 deletions
diff --git a/arch/mips/cavium-octeon/Makefile b/arch/mips/cavium-octeon/Makefile index 7c0528b0e34..d6903c3f3d5 100644 --- a/arch/mips/cavium-octeon/Makefile +++ b/arch/mips/cavium-octeon/Makefile @@ -14,9 +14,5 @@ obj-y += dma-octeon.o flash_setup.o 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 diff --git a/arch/mips/cavium-octeon/dma-octeon.c b/arch/mips/cavium-octeon/dma-octeon.c index 627c162a615..4b92bfc662d 100644 --- a/arch/mips/cavium-octeon/dma-octeon.c +++ b/arch/mips/cavium-octeon/dma-octeon.c @@ -29,7 +29,7 @@ #include <dma-coherence.h> #ifdef CONFIG_PCI -#include "pci-common.h" +#include <asm/octeon/pci-octeon.h> #endif #define BAR2_PCI_ADDRESS 0x8000000000ul diff --git a/arch/mips/cavium-octeon/msi.c b/arch/mips/cavium-octeon/msi.c deleted file mode 100644 index 964b03b75a8..00000000000 --- a/arch/mips/cavium-octeon/msi.c +++ /dev/null @@ -1,288 +0,0 @@ -/* - * 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); diff --git a/arch/mips/cavium-octeon/pci-common.c b/arch/mips/cavium-octeon/pci-common.c deleted file mode 100644 index cd029f88da7..00000000000 --- a/arch/mips/cavium-octeon/pci-common.c +++ /dev/null @@ -1,137 +0,0 @@ -/* - * 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; -} diff --git a/arch/mips/cavium-octeon/pci-common.h b/arch/mips/cavium-octeon/pci-common.h deleted file mode 100644 index 74ae79991e4..00000000000 --- a/arch/mips/cavium-octeon/pci-common.h +++ /dev/null @@ -1,39 +0,0 @@ -/* - * 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 diff --git a/arch/mips/cavium-octeon/pci.c b/arch/mips/cavium-octeon/pci.c deleted file mode 100644 index 67c0ff5e92f..00000000000 --- a/arch/mips/cavium-octeon/pci.c +++ /dev/null @@ -1,568 +0,0 @@ -/* - * 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); diff --git a/arch/mips/cavium-octeon/pcie.c b/arch/mips/cavium-octeon/pcie.c deleted file mode 100644 index 49d14081b3b..00000000000 --- a/arch/mips/cavium-octeon/pcie.c +++ /dev/null @@ -1,1370 +0,0 @@ -/* - * 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); |