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Use defines instead of magic numbers

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This commit is contained in:
Alex Forencich 2021-06-27 14:04:43 -07:00
parent 5d153635f4
commit cd9f6a9329
1 changed files with 13 additions and 12 deletions
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25
utils/mqnic-fw.c
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@ -40,6 +40,7 @@ either expressed or implied, of The Regents of the University of California.
#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <linux/pci.h>
#include "mqnic.h"
#include "bitfile.h"
@ -364,16 +365,16 @@ int pcie_hot_reset(const char *pcie_port_path)
// set and then clear secondary bus reset bit (mask 0x0040)
// in the bridge control register (offset 0x3e)
pread(fd, buf, 2, 0x3e);
pread(fd, buf, 2, PCI_BRIDGE_CONTROL);
buf[2] = buf[0] | 0x40;
buf[2] = buf[0] | PCI_BRIDGE_CTL_BUS_RESET;
buf[3] = buf[1];
pwrite(fd, buf+2, 2, 0x3e);
pwrite(fd, buf+2, 2, PCI_BRIDGE_CONTROL);
usleep(10000);
pwrite(fd, buf, 2, 0x3e);
pwrite(fd, buf, 2, PCI_BRIDGE_CONTROL);
close(fd);
@ -398,17 +399,17 @@ int pcie_disable_fatal_err(const char *pcie_port_path)
}
// clear SERR bit (mask 0x0100) in command register (offset 0x04)
pread(fd, buf, 2, 0x04);
pread(fd, buf, 2, PCI_COMMAND);
buf[1] &= ~0x01;
buf[1] &= ~(PCI_COMMAND_SERR >> 8);
pwrite(fd, buf, 2, 0x04);
pwrite(fd, buf, 2, PCI_COMMAND);
// clear fatal error reporting bit (mask 0x0004) in
// PCIe capability device control register (offset 0x08)
// find PCIe capability (ID 0x10)
pread(fd, buf, 1, 0x34);
pread(fd, buf, 1, PCI_CAPABILITY_LIST);
offset = buf[0] & 0xfc;
@ -416,7 +417,7 @@ int pcie_disable_fatal_err(const char *pcie_port_path)
{
pread(fd, buf, 2, offset);
if (buf[0] == 0x10)
if (buf[0] == PCI_CAP_ID_EXP)
break;
offset = buf[1] & 0xfc;
@ -425,11 +426,11 @@ int pcie_disable_fatal_err(const char *pcie_port_path)
// clear bit
if (offset)
{
pread(fd, buf, 2, offset+0x08);
pread(fd, buf, 2, offset+PCI_EXP_DEVCTL);
buf[0] &= ~0x04;
buf[0] &= ~PCI_EXP_DEVCTL_FERE;
pwrite(fd, buf, 2, offset+0x08);
pwrite(fd, buf, 2, offset+PCI_EXP_DEVCTL);
}
close(fd);