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Query regs size via info ioctl

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This commit is contained in:
Alex Forencich 2019-07-23 18:43:58 -07:00
parent 5ea84cb7b5
commit 987e11f6c0
2 changed files with 11 additions and 1 deletions
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11
utils/mqnic.c
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@ -36,6 +36,7 @@ either expressed or implied, of The Regents of the University of California.
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
struct mqnic *mqnic_open(const char *dev_name)
@ -56,7 +57,14 @@ struct mqnic *mqnic_open(const char *dev_name)
goto fail_open;
}
dev->regs_size = 0x1000000;
struct mqnic_ioctl_info info;
if (ioctl(dev->fd, MQNIC_IOCTL_INFO, &info) != 0)
{
perror("MQNICCTL_INFO ioctl failed");
goto fail_ioctl;
}
dev->regs_size = info.regs_size;
dev->regs = (volatile uint8_t *)mmap(NULL, dev->regs_size, PROT_READ | PROT_WRITE, MAP_SHARED, dev->fd, 0);
if (dev->regs == MAP_FAILED)
{
@ -122,6 +130,7 @@ struct mqnic *mqnic_open(const char *dev_name)
return dev;
fail_mmap_regs:
fail_ioctl:
close(dev->fd);
fail_open:
free(dev);

1
utils/mqnic.h
View File

@ -38,6 +38,7 @@ either expressed or implied, of The Regents of the University of California.
#include <unistd.h>
#include "mqnic_hw.h"
#include "mqnic_ioctl.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