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Add shared utility code

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Alex Forencich 2019-07-21 21:53:37 -07:00
parent 762037e8a8
commit 1b147ff7c8
2 changed files with 234 additions and 0 deletions
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138
utils/mqnic.c Normal file
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/*
Copyright 2019, The Regents of the University of California.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE REGENTS OF THE UNIVERSITY OF CALIFORNIA ''AS
IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE REGENTS OF THE UNIVERSITY OF CALIFORNIA OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
OF SUCH DAMAGE.
The views and conclusions contained in the software and documentation are those
of the authors and should not be interpreted as representing official policies,
either expressed or implied, of The Regents of the University of California.
*/
#include "mqnic.h"
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>
struct mqnic *mqnic_open(const char *dev_name)
{
struct mqnic *dev = calloc(1, sizeof(struct mqnic));
if (!dev)
{
perror("memory allocation failed");
goto fail_alloc;
}
dev->fd = open(dev_name, O_RDWR);
if (dev->fd < 0)
{
perror("open device failed");
goto fail_open;
}
dev->regs_size = 0x1000000;
dev->regs = (volatile uint8_t *)mmap(NULL, dev->regs_size, PROT_READ | PROT_WRITE, MAP_SHARED, dev->fd, 0);
if (dev->regs == MAP_FAILED)
{
perror("mmap regs failed");
goto fail_mmap_regs;
}
dev->fw_id = mqnic_reg_read32(dev->regs, MQNIC_REG_FW_ID);
dev->fw_ver = mqnic_reg_read32(dev->regs, MQNIC_REG_FW_VER);
dev->board_id = mqnic_reg_read32(dev->regs, MQNIC_REG_BOARD_ID);
dev->board_ver = mqnic_reg_read32(dev->regs, MQNIC_REG_BOARD_VER);
dev->phc_count = mqnic_reg_read32(dev->regs, MQNIC_REG_PHC_COUNT);
dev->phc_offset = mqnic_reg_read32(dev->regs, MQNIC_REG_PHC_OFFSET);
if (dev->phc_count)
{
dev->phc_regs = dev->regs + dev->phc_offset;
}
dev->if_count = mqnic_reg_read32(dev->regs, MQNIC_REG_IF_COUNT);
dev->if_stride = mqnic_reg_read32(dev->regs, MQNIC_REG_IF_STRIDE);
dev->if_csr_offset = mqnic_reg_read32(dev->regs, MQNIC_REG_IF_CSR_OFFSET);
if (dev->if_count > MQNIC_MAX_IF)
dev->if_count = MQNIC_MAX_IF;
for (int k = 0; k < dev->if_count; k++)
{
struct mqnic_if *interface = &dev->interfaces[k];
interface->regs = dev->regs + k*dev->if_stride;
interface->csr_regs = interface->regs + dev->if_csr_offset;
interface->if_id = mqnic_reg_read32(interface->csr_regs, MQNIC_IF_REG_IF_ID);
interface->event_queue_count = mqnic_reg_read32(interface->csr_regs, MQNIC_IF_REG_EVENT_QUEUE_COUNT);
interface->event_queue_offset = mqnic_reg_read32(interface->csr_regs, MQNIC_IF_REG_EVENT_QUEUE_OFFSET);
interface->tx_queue_count = mqnic_reg_read32(interface->csr_regs, MQNIC_IF_REG_TX_QUEUE_COUNT);
interface->tx_queue_offset = mqnic_reg_read32(interface->csr_regs, MQNIC_IF_REG_TX_QUEUE_OFFSET);
interface->tx_cpl_queue_count = mqnic_reg_read32(interface->csr_regs, MQNIC_IF_REG_TX_CPL_QUEUE_COUNT);
interface->tx_cpl_queue_offset = mqnic_reg_read32(interface->csr_regs, MQNIC_IF_REG_TX_CPL_QUEUE_OFFSET);
interface->rx_queue_count = mqnic_reg_read32(interface->csr_regs, MQNIC_IF_REG_RX_QUEUE_COUNT);
interface->rx_queue_offset = mqnic_reg_read32(interface->csr_regs, MQNIC_IF_REG_RX_QUEUE_OFFSET);
interface->rx_cpl_queue_count = mqnic_reg_read32(interface->csr_regs, MQNIC_IF_REG_RX_CPL_QUEUE_COUNT);
interface->rx_cpl_queue_offset = mqnic_reg_read32(interface->csr_regs, MQNIC_IF_REG_RX_CPL_QUEUE_OFFSET);
interface->port_count = mqnic_reg_read32(interface->csr_regs, MQNIC_IF_REG_PORT_COUNT);
interface->port_offset = mqnic_reg_read32(interface->csr_regs, MQNIC_IF_REG_PORT_OFFSET);
interface->port_stride = mqnic_reg_read32(interface->csr_regs, MQNIC_IF_REG_PORT_STRIDE);
if (interface->event_queue_count > MQNIC_MAX_EVENT_RINGS)
interface->event_queue_count = MQNIC_MAX_EVENT_RINGS;
if (interface->tx_queue_count > MQNIC_MAX_TX_RINGS)
interface->tx_queue_count = MQNIC_MAX_TX_RINGS;
if (interface->tx_cpl_queue_count > MQNIC_MAX_TX_CPL_RINGS)
interface->tx_cpl_queue_count = MQNIC_MAX_TX_CPL_RINGS;
if (interface->rx_queue_count > MQNIC_MAX_RX_RINGS)
interface->rx_queue_count = MQNIC_MAX_RX_RINGS;
if (interface->rx_cpl_queue_count > MQNIC_MAX_RX_CPL_RINGS)
interface->rx_cpl_queue_count = MQNIC_MAX_RX_CPL_RINGS;
}
return dev;
fail_mmap_regs:
close(dev->fd);
fail_open:
free(dev);
fail_alloc:
return NULL;
}
void mqnic_close(struct mqnic *dev)
{
munmap((void *)dev->regs, dev->regs_size);
close(dev->fd);
free(dev);
}

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/*
Copyright 2019, The Regents of the University of California.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE REGENTS OF THE UNIVERSITY OF CALIFORNIA ''AS
IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE REGENTS OF THE UNIVERSITY OF CALIFORNIA OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
OF SUCH DAMAGE.
The views and conclusions contained in the software and documentation are those
of the authors and should not be interpreted as representing official policies,
either expressed or implied, of The Regents of the University of California.
*/
#ifndef MQNIC_H
#define MQNIC_H
#include <stdint.h>
#include <unistd.h>
#include "mqnic_hw.h"
#define mqnic_reg_read32(base, reg) (((volatile uint32_t *)(base))[(reg)/4])
#define mqnic_reg_write32(base, reg, val) (((volatile uint32_t *)(base))[(reg)/4]) = val
struct mqnic;
struct mqnic_if {
struct mqnic *mqnic;
volatile uint8_t *regs;
volatile uint8_t *csr_regs;
uint32_t if_id;
uint32_t event_queue_count;
uint32_t event_queue_offset;
uint32_t tx_queue_count;
uint32_t tx_queue_offset;
uint32_t tx_cpl_queue_count;
uint32_t tx_cpl_queue_offset;
uint32_t rx_queue_count;
uint32_t rx_queue_offset;
uint32_t rx_cpl_queue_count;
uint32_t rx_cpl_queue_offset;
uint32_t port_count;
uint32_t port_offset;
uint32_t port_stride;
};
struct mqnic {
int fd;
size_t regs_size;
volatile uint8_t *regs;
volatile uint8_t *phc_regs;
uint32_t fw_id;
uint32_t fw_ver;
uint32_t board_id;
uint32_t board_ver;
uint32_t phc_count;
uint32_t phc_offset;
uint32_t if_count;
uint32_t if_stride;
uint32_t if_csr_offset;
struct mqnic_if interfaces[MQNIC_MAX_IF];
};
struct mqnic *mqnic_open(const char *dev_name);
void mqnic_close(struct mqnic *dev);
#endif /* MQNIC_H */