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pci: add Error-propagating pci_add_capability2() 

... and rebase pci_add_capability() to it.

Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
Laszlo Ersek 2014-04-10 10:24:36 +02:00 committed by Luiz Capitulino
parent 665f119fba
commit cd9aa33e2c
2 changed files with 30 additions and 6 deletions
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32
hw/pci/pci.c
View File

@ -2012,6 +2012,25 @@ static void pci_del_option_rom(PCIDevice *pdev)
* in pci config space */
int pci_add_capability(PCIDevice *pdev, uint8_t cap_id,
uint8_t offset, uint8_t size)
{
int ret;
Error *local_err = NULL;
ret = pci_add_capability2(pdev, cap_id, offset, size, &local_err);
if (local_err) {
assert(ret < 0);
error_report("%s", error_get_pretty(local_err));
error_free(local_err);
} else {
/* success implies a positive offset in config space */
assert(ret > 0);
}
return ret;
}
int pci_add_capability2(PCIDevice *pdev, uint8_t cap_id,
uint8_t offset, uint8_t size,
Error **errp)
{
uint8_t *config;
int i, overlapping_cap;
@ -2019,6 +2038,7 @@ int pci_add_capability(PCIDevice *pdev, uint8_t cap_id,
if (!offset) {
offset = pci_find_space(pdev, size);
if (!offset) {
error_setg(errp, "out of PCI config space");
return -ENOSPC;
}
} else {
@ -2029,12 +2049,12 @@ int pci_add_capability(PCIDevice *pdev, uint8_t cap_id,
for (i = offset; i < offset + size; i++) {
overlapping_cap = pci_find_capability_at_offset(pdev, i);
if (overlapping_cap) {
fprintf(stderr, "ERROR: %s:%02x:%02x.%x "
"Attempt to add PCI capability %x at offset "
"%x overlaps existing capability %x at offset %x\n",
pci_root_bus_path(pdev), pci_bus_num(pdev->bus),
PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn),
cap_id, offset, overlapping_cap, i);
error_setg(errp, "%s:%02x:%02x.%x "
"Attempt to add PCI capability %x at offset "
"%x overlaps existing capability %x at offset %x",
pci_root_bus_path(pdev), pci_bus_num(pdev->bus),
PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn),
cap_id, offset, overlapping_cap, i);
return -EINVAL;
}
}

4
include/hw/pci/pci.h
View File

@ -6,6 +6,7 @@
#include "hw/qdev.h"
#include "exec/memory.h"
#include "sysemu/dma.h"
#include "qapi/error.h"
/* PCI includes legacy ISA access. */
#include "hw/isa/isa.h"
@ -308,6 +309,9 @@ pcibus_t pci_get_bar_addr(PCIDevice *pci_dev, int region_num);
int pci_add_capability(PCIDevice *pdev, uint8_t cap_id,
uint8_t offset, uint8_t size);
int pci_add_capability2(PCIDevice *pdev, uint8_t cap_id,
uint8_t offset, uint8_t size,
Error **errp);
void pci_del_capability(PCIDevice *pci_dev, uint8_t cap_id, uint8_t cap_size);