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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PULL 05/19] hw/pci-assign: split pci-assign.c
From: Tiejun Chen <tiejun.chen@xxxxxxxxx>
We will try to reuse assign_dev_load_option_rom in xen side, and
especially its a good beginning to unify pci assign codes both on
kvm and xen in the future.
Signed-off-by: Tiejun Chen <tiejun.chen@xxxxxxxxx>
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Acked-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
---
hw/i386/Makefile.objs | 1 +
hw/i386/kvm/pci-assign.c | 82 ++++--------------------------------
hw/i386/pci-assign-load-rom.c | 93 +++++++++++++++++++++++++++++++++++++++++
include/hw/pci/pci-assign.h | 27 ++++++++++++
4 files changed, 128 insertions(+), 75 deletions(-)
create mode 100644 hw/i386/pci-assign-load-rom.c
create mode 100644 include/hw/pci/pci-assign.h
diff --git a/hw/i386/Makefile.objs b/hw/i386/Makefile.objs
index ebd1015..c250deb 100644
--- a/hw/i386/Makefile.objs
+++ b/hw/i386/Makefile.objs
@@ -7,6 +7,7 @@ obj-$(CONFIG_XEN) += ../xenpv/ xen/
obj-y += kvmvapic.o
obj-y += acpi-build.o
+obj-y += pci-assign-load-rom.o
gen-hex-y += hw/i386/acpi-dsdt.hex
gen-hex-y += hw/i386/q35-acpi-dsdt.hex
diff --git a/hw/i386/kvm/pci-assign.c b/hw/i386/kvm/pci-assign.c
index 74d22f4..b1beaa6 100644
--- a/hw/i386/kvm/pci-assign.c
+++ b/hw/i386/kvm/pci-assign.c
@@ -37,6 +37,7 @@
#include "hw/pci/pci.h"
#include "hw/pci/msi.h"
#include "kvm_i386.h"
+#include "hw/pci/pci-assign.h"
#define MSIX_PAGE_SIZE 0x1000
@@ -48,17 +49,6 @@
#define IORESOURCE_PREFETCH 0x00002000 /* No side effects */
#define IORESOURCE_MEM_64 0x00100000
-//#define DEVICE_ASSIGNMENT_DEBUG
-
-#ifdef DEVICE_ASSIGNMENT_DEBUG
-#define DEBUG(fmt, ...) \
- do { \
- fprintf(stderr, "%s: " fmt, __func__ , __VA_ARGS__); \
- } while (0)
-#else
-#define DEBUG(fmt, ...)
-#endif
-
typedef struct PCIRegion {
int type; /* Memory or port I/O */
int valid;
@@ -1896,73 +1886,15 @@ static void assign_register_types(void)
type_init(assign_register_types)
-/*
- * Scan the assigned devices for the devices that have an option ROM, and then
- * load the corresponding ROM data to RAM. If an error occurs while loading an
- * option ROM, we just ignore that option ROM and continue with the next one.
- */
static void assigned_dev_load_option_rom(AssignedDevice *dev)
{
- char name[32], rom_file[64];
- FILE *fp;
- uint8_t val;
- struct stat st;
- void *ptr;
-
- /* If loading ROM from file, pci handles it */
- if (dev->dev.romfile || !dev->dev.rom_bar) {
- return;
- }
+ int size = 0;
- snprintf(rom_file, sizeof(rom_file),
- "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/rom",
- dev->host.domain, dev->host.bus, dev->host.slot,
- dev->host.function);
+ pci_assign_dev_load_option_rom(&dev->dev, OBJECT(dev), &size,
+ dev->host.domain, dev->host.bus,
+ dev->host.slot, dev->host.function);
- if (stat(rom_file, &st)) {
- return;
- }
-
- if (access(rom_file, F_OK)) {
- error_report("pci-assign: Insufficient privileges for %s", rom_file);
- return;
- }
-
- /* Write "1" to the ROM file to enable it */
- fp = fopen(rom_file, "r+");
- if (fp == NULL) {
- return;
+ if (!size) {
+ error_report("pci-assign: Invalid ROM.");
}
- val = 1;
- if (fwrite(&val, 1, 1, fp) != 1) {
- goto close_rom;
- }
- fseek(fp, 0, SEEK_SET);
-
- snprintf(name, sizeof(name), "%s.rom",
- object_get_typename(OBJECT(dev)));
- memory_region_init_ram(&dev->dev.rom, OBJECT(dev), name, st.st_size,
- &error_abort);
- vmstate_register_ram(&dev->dev.rom, &dev->dev.qdev);
- ptr = memory_region_get_ram_ptr(&dev->dev.rom);
- memset(ptr, 0xff, st.st_size);
-
- if (!fread(ptr, 1, st.st_size, fp)) {
- error_report("pci-assign: Cannot read from host %s", rom_file);
- error_printf("Device option ROM contents are probably invalid "
- "(check dmesg).\nSkip option ROM probe with rombar=0, "
- "or load from file with romfile=\n");
- goto close_rom;
- }
-
- pci_register_bar(&dev->dev, PCI_ROM_SLOT, 0, &dev->dev.rom);
- dev->dev.has_rom = true;
-close_rom:
- /* Write "0" to disable ROM */
- fseek(fp, 0, SEEK_SET);
- val = 0;
- if (!fwrite(&val, 1, 1, fp)) {
- DEBUG("%s\n", "Failed to disable pci-sysfs rom file");
- }
- fclose(fp);
}
diff --git a/hw/i386/pci-assign-load-rom.c b/hw/i386/pci-assign-load-rom.c
new file mode 100644
index 0000000..bad53b7
--- /dev/null
+++ b/hw/i386/pci-assign-load-rom.c
@@ -0,0 +1,93 @@
+/*
+ * This is splited from hw/i386/kvm/pci-assign.c
+ */
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/io.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "hw/hw.h"
+#include "hw/i386/pc.h"
+#include "qemu/error-report.h"
+#include "ui/console.h"
+#include "hw/loader.h"
+#include "monitor/monitor.h"
+#include "qemu/range.h"
+#include "sysemu/sysemu.h"
+#include "hw/pci/pci.h"
+#include "hw/pci/pci-assign.h"
+
+/*
+ * Scan the assigned devices for the devices that have an option ROM, and then
+ * load the corresponding ROM data to RAM. If an error occurs while loading an
+ * option ROM, we just ignore that option ROM and continue with the next one.
+ */
+void *pci_assign_dev_load_option_rom(PCIDevice *dev, struct Object *owner,
+ int *size, unsigned int domain,
+ unsigned int bus, unsigned int slot,
+ unsigned int function)
+{
+ char name[32], rom_file[64];
+ FILE *fp;
+ uint8_t val;
+ struct stat st;
+ void *ptr = NULL;
+
+ /* If loading ROM from file, pci handles it */
+ if (dev->romfile || !dev->rom_bar) {
+ return NULL;
+ }
+
+ snprintf(rom_file, sizeof(rom_file),
+ "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/rom",
+ domain, bus, slot, function);
+
+ if (stat(rom_file, &st)) {
+ return NULL;
+ }
+
+ if (access(rom_file, F_OK)) {
+ error_report("pci-assign: Insufficient privileges for %s", rom_file);
+ return NULL;
+ }
+
+ /* Write "1" to the ROM file to enable it */
+ fp = fopen(rom_file, "r+");
+ if (fp == NULL) {
+ return NULL;
+ }
+ val = 1;
+ if (fwrite(&val, 1, 1, fp) != 1) {
+ goto close_rom;
+ }
+ fseek(fp, 0, SEEK_SET);
+
+ snprintf(name, sizeof(name), "%s.rom", object_get_typename(owner));
+ memory_region_init_ram(&dev->rom, owner, name, st.st_size, &error_abort);
+ vmstate_register_ram(&dev->rom, &dev->qdev);
+ ptr = memory_region_get_ram_ptr(&dev->rom);
+ memset(ptr, 0xff, st.st_size);
+
+ if (!fread(ptr, 1, st.st_size, fp)) {
+ error_report("pci-assign: Cannot read from host %s", rom_file);
+ error_printf("Device option ROM contents are probably invalid "
+ "(check dmesg).\nSkip option ROM probe with rombar=0, "
+ "or load from file with romfile=\n");
+ goto close_rom;
+ }
+
+ pci_register_bar(dev, PCI_ROM_SLOT, 0, &dev->rom);
+ dev->has_rom = true;
+ *size = st.st_size;
+close_rom:
+ /* Write "0" to disable ROM */
+ fseek(fp, 0, SEEK_SET);
+ val = 0;
+ if (!fwrite(&val, 1, 1, fp)) {
+ DEBUG("%s\n", "Failed to disable pci-sysfs rom file");
+ }
+ fclose(fp);
+
+ return ptr;
+}
diff --git a/include/hw/pci/pci-assign.h b/include/hw/pci/pci-assign.h
new file mode 100644
index 0000000..55f42c5
--- /dev/null
+++ b/include/hw/pci/pci-assign.h
@@ -0,0 +1,27 @@
+/*
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ * Just split from hw/i386/kvm/pci-assign.c.
+ */
+#ifndef PCI_ASSIGN_H
+#define PCI_ASSIGN_H
+
+#include "hw/pci/pci.h"
+
+//#define DEVICE_ASSIGNMENT_DEBUG
+
+#ifdef DEVICE_ASSIGNMENT_DEBUG
+#define DEBUG(fmt, ...) \
+ do { \
+ fprintf(stderr, "%s: " fmt, __func__ , __VA_ARGS__); \
+ } while (0)
+#else
+#define DEBUG(fmt, ...)
+#endif
+
+void *pci_assign_dev_load_option_rom(PCIDevice *dev, struct Object *owner,
+ int *size, unsigned int domain,
+ unsigned int bus, unsigned int slot,
+ unsigned int function);
+#endif /* PCI_ASSIGN_H */
--
1.7.10.4
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