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number of cleanups in i386 and amd64 pci md code

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o introduce PCIE_REGMAX and use it instead of ad-hoc constant
o where 'reg' parameter/variable is not already unsigned, cast it to
  unsigned before comparison with maximum value to cut off negative
  values
o use PCI_SLOTMAX in several places where 31 or 32 were explicitly used
o drop redundant check of 'bytes' in i386 pciereg_cfgread() - valid
  values are already checked in the subsequent switch

Reviewed by:	jhb
MFC after:	1 week
This commit is contained in:
Andriy Gapon 2009-09-24 07:11:23 +00:00
parent 87f4470620
commit 1e908511f8
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=197450
3 changed files with 16 additions and 15 deletions
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16
sys/amd64/pci/pci_cfgreg.c
View File

@ -181,9 +181,9 @@ pci_cfgenable(unsigned bus, unsigned slot, unsigned func, int reg, int bytes)
{
int dataport = 0;
if (bus <= PCI_BUSMAX && slot < 32 && func <= PCI_FUNCMAX &&
reg <= PCI_REGMAX && bytes != 3 && (unsigned) bytes <= 4 &&
(reg & (bytes - 1)) == 0) {
if (bus <= PCI_BUSMAX && slot <= PCI_SLOTMAX && func <= PCI_FUNCMAX &&
(unsigned)reg <= PCI_REGMAX && bytes != 3 &&
(unsigned)bytes <= 4 && (reg & (bytes - 1)) == 0) {
outl(CONF1_ADDR_PORT, (1 << 31) | (bus << 16) | (slot << 11)
| (func << 8) | (reg & ~0x03));
dataport = CONF1_DATA_PORT + (reg & 0x03);
@ -281,7 +281,7 @@ pcie_cfgregopen(uint64_t base, uint8_t minbus, uint8_t maxbus)
* fall back to using type 1 config access instead.
*/
if (pci_cfgregopen() != 0) {
for (slot = 0; slot < 32; slot++) {
for (slot = 0; slot <= PCI_SLOTMAX; slot++) {
val1 = pcireg_cfgread(0, slot, 0, 0, 4);
if (val1 == 0xffffffff)
continue;
@ -309,8 +309,8 @@ pciereg_cfgread(int bus, unsigned slot, unsigned func, unsigned reg,
volatile vm_offset_t va;
int data = -1;
if (bus < pcie_minbus || bus > pcie_maxbus || slot >= 32 ||
func > PCI_FUNCMAX || reg >= 0x1000)
if (bus < pcie_minbus || bus > pcie_maxbus || slot > PCI_SLOTMAX ||
func > PCI_FUNCMAX || reg > PCIE_REGMAX)
return (-1);
va = PCIE_VADDR(pcie_base, reg, bus, slot, func);
@ -336,8 +336,8 @@ pciereg_cfgwrite(int bus, unsigned slot, unsigned func, unsigned reg, int data,
{
volatile vm_offset_t va;
if (bus < pcie_minbus || bus > pcie_maxbus || slot >= 32 ||
func > PCI_FUNCMAX || reg >= 0x1000)
if (bus < pcie_minbus || bus > pcie_maxbus || slot > PCI_SLOTMAX ||
func > PCI_FUNCMAX || reg > PCIE_REGMAX)
return;
va = PCIE_VADDR(pcie_base, reg, bus, slot, func);

1
sys/dev/pci/pcireg.h
View File

@ -44,6 +44,7 @@
#define PCI_SLOTMAX 31 /* highest supported slot number */
#define PCI_FUNCMAX 7 /* highest supported function number */
#define PCI_REGMAX 255 /* highest supported config register addr. */
#define PCIE_REGMAX 4095 /* highest supported config register addr. */
#define PCI_MAXHDRTYPE 2
/* PCI config header registers for all devices */

14
sys/i386/pci/pci_cfgreg.c
View File

@ -299,9 +299,9 @@ pci_cfgenable(unsigned bus, unsigned slot, unsigned func, int reg, int bytes)
if (bus <= PCI_BUSMAX
&& slot < devmax
&& func <= PCI_FUNCMAX
&& reg <= PCI_REGMAX
&& (unsigned)reg <= PCI_REGMAX
&& bytes != 3
&& (unsigned) bytes <= 4
&& (unsigned)bytes <= 4
&& (reg & (bytes - 1)) == 0) {
switch (cfgmech) {
case CFGMECH_PCIE:
@ -595,7 +595,7 @@ pcie_cfgregopen(uint64_t base, uint8_t minbus, uint8_t maxbus)
* fall back to using type 1 config access instead.
*/
if (pci_cfgregopen() != 0) {
for (slot = 0; slot < 32; slot++) {
for (slot = 0; slot <= PCI_SLOTMAX; slot++) {
val1 = pcireg_cfgread(0, slot, 0, 0, 4);
if (val1 == 0xffffffff)
continue;
@ -661,8 +661,8 @@ pciereg_cfgread(int bus, unsigned slot, unsigned func, unsigned reg,
vm_paddr_t pa, papage;
int data = -1;
if (bus < pcie_minbus || bus > pcie_maxbus || slot >= 32 ||
func > PCI_FUNCMAX || reg >= 0x1000 || bytes > 4 || bytes == 3)
if (bus < pcie_minbus || bus > pcie_maxbus || slot > PCI_SLOTMAX ||
func > PCI_FUNCMAX || reg > PCIE_REGMAX)
return (-1);
critical_enter();
@ -695,8 +695,8 @@ pciereg_cfgwrite(int bus, unsigned slot, unsigned func, unsigned reg, int data,
volatile vm_offset_t va;
vm_paddr_t pa, papage;
if (bus < pcie_minbus || bus > pcie_maxbus || slot >= 32 ||
func > PCI_FUNCMAX || reg >= 0x1000)
if (bus < pcie_minbus || bus > pcie_maxbus || slot > PCI_SLOTMAX ||
func > PCI_FUNCMAX || reg > PCIE_REGMAX)
return;
critical_enter();