On Sat, Jan 28, 2012 at 07:21:58AM -0700, Alex Williamson wrote:
> This makes access much easier.
>
> Signed-off-by: Alex Williamson <[email protected]>
Yes but this also makes it easier to forget
to handle endian-ness.
How about using pci_get/pci_set instead?
> ---
>
> hw/device-assignment.c | 55
> ++++++++++++++++++++++--------------------------
> hw/device-assignment.h | 9 +++++++-
> 2 files changed, 33 insertions(+), 31 deletions(-)
>
> diff --git a/hw/device-assignment.c b/hw/device-assignment.c
> index 1fc7ffa..422ee00 100644
> --- a/hw/device-assignment.c
> +++ b/hw/device-assignment.c
> @@ -973,10 +973,9 @@ static int assigned_dev_update_msix_mmio(PCIDevice
> *pci_dev)
> AssignedDevice *adev = DO_UPCAST(AssignedDevice, dev, pci_dev);
> uint16_t entries_nr = 0, entries_max_nr;
> int pos = 0, i, r = 0;
> - uint32_t msg_addr, msg_upper_addr, msg_data, msg_ctrl;
> struct kvm_assigned_msix_nr msix_nr;
> struct kvm_assigned_msix_entry msix_entry;
> - void *va = adev->msix_table_page;
> + MSIXTableEntry *entry = adev->msix_table;
>
> pos = pci_find_capability(pci_dev, PCI_CAP_ID_MSIX);
>
> @@ -985,12 +984,11 @@ static int assigned_dev_update_msix_mmio(PCIDevice
> *pci_dev)
> entries_max_nr += 1;
>
> /* Get the usable entry number for allocating */
> - for (i = 0; i < entries_max_nr; i++) {
> - memcpy(&msg_ctrl, va + i * 16 + 12, 4);
> - memcpy(&msg_data, va + i * 16 + 8, 4);
> + for (i = 0; i < entries_max_nr; i++, entry++) {
> /* Ignore unused entry even it's unmasked */
> - if (msg_data == 0)
> + if (entry->data == 0) {
> continue;
> + }
> entries_nr ++;
> }
>
> @@ -1013,16 +1011,13 @@ static int assigned_dev_update_msix_mmio(PCIDevice
> *pci_dev)
>
> msix_entry.assigned_dev_id = msix_nr.assigned_dev_id;
> entries_nr = 0;
> - for (i = 0; i < entries_max_nr; i++) {
> + entry = adev->msix_table;
> + for (i = 0; i < entries_max_nr; i++, entry++) {
> if (entries_nr >= msix_nr.entry_nr)
> break;
> - memcpy(&msg_ctrl, va + i * 16 + 12, 4);
> - memcpy(&msg_data, va + i * 16 + 8, 4);
> - if (msg_data == 0)
> + if (entry->data == 0) {
> continue;
> -
> - memcpy(&msg_addr, va + i * 16, 4);
> - memcpy(&msg_upper_addr, va + i * 16 + 4, 4);
> + }
>
> r = kvm_get_irq_route_gsi();
> if (r < 0)
> @@ -1031,10 +1026,11 @@ static int assigned_dev_update_msix_mmio(PCIDevice
> *pci_dev)
> adev->entry[entries_nr].gsi = r;
> adev->entry[entries_nr].type = KVM_IRQ_ROUTING_MSI;
> adev->entry[entries_nr].flags = 0;
> - adev->entry[entries_nr].u.msi.address_lo = msg_addr;
> - adev->entry[entries_nr].u.msi.address_hi = msg_upper_addr;
> - adev->entry[entries_nr].u.msi.data = msg_data;
> - DEBUG("MSI-X data 0x%x, MSI-X addr_lo 0x%x\n!", msg_data, msg_addr);
> + adev->entry[entries_nr].u.msi.address_lo = entry->addr_lo;
> + adev->entry[entries_nr].u.msi.address_hi = entry->addr_hi;
> + adev->entry[entries_nr].u.msi.data = entry->data;
> + DEBUG("MSI-X data 0x%x, MSI-X addr_lo 0x%x\n!",
> + entry->data, entry->addr_lo);
> kvm_add_routing_entry(&adev->entry[entries_nr]);
>
> msix_entry.gsi = adev->entry[entries_nr].gsi;
> @@ -1443,7 +1439,7 @@ static uint64_t msix_mmio_read(void *opaque,
> target_phys_addr_t addr,
> AssignedDevice *adev = opaque;
> uint64_t val;
>
> - memcpy(&val, (void *)((uint8_t *)adev->msix_table_page + addr), size);
> + memcpy(&val, (void *)((uint8_t *)adev->msix_table + addr), size);
>
> return val;
> }
> @@ -1456,7 +1452,7 @@ static void msix_mmio_write(void *opaque,
> target_phys_addr_t addr,
> DEBUG("write to MSI-X entry table mmio offset 0x%lx, val 0x%lx\n",
> addr, val);
>
> - memcpy((void *)((uint8_t *)adev->msix_table_page + addr), &val, size);
> + memcpy((void *)((uint8_t *)adev->msix_table + addr), &val, size);
> }
>
> static const MemoryRegionOps msix_mmio_ops = {
> @@ -1471,15 +1467,13 @@ static const MemoryRegionOps msix_mmio_ops = {
>
> static int assigned_dev_register_msix_mmio(AssignedDevice *dev)
> {
> - dev->msix_table_page = mmap(NULL, 0x1000,
> - PROT_READ|PROT_WRITE,
> - MAP_ANONYMOUS|MAP_PRIVATE, 0, 0);
> - if (dev->msix_table_page == MAP_FAILED) {
> - fprintf(stderr, "fail allocate msix_table_page! %s\n",
> - strerror(errno));
> + dev->msix_table = mmap(NULL, 0x1000, PROT_READ|PROT_WRITE,
> + MAP_ANONYMOUS|MAP_PRIVATE, 0, 0);
> + if (dev->msix_table == MAP_FAILED) {
> + fprintf(stderr, "fail allocate msix_table! %s\n", strerror(errno));
> return -EFAULT;
> }
> - memset(dev->msix_table_page, 0, 0x1000);
> + memset(dev->msix_table, 0, 0x1000);
> memory_region_init_io(&dev->mmio, &msix_mmio_ops, dev,
> "assigned-dev-msix", MSIX_PAGE_SIZE);
> return 0;
> @@ -1487,16 +1481,17 @@ static int
> assigned_dev_register_msix_mmio(AssignedDevice *dev)
>
> static void assigned_dev_unregister_msix_mmio(AssignedDevice *dev)
> {
> - if (!dev->msix_table_page)
> + if (!dev->msix_table) {
> return;
> + }
>
> memory_region_destroy(&dev->mmio);
>
> - if (munmap(dev->msix_table_page, 0x1000) == -1) {
> - fprintf(stderr, "error unmapping msix_table_page! %s\n",
> + if (munmap(dev->msix_table, 0x1000) == -1) {
> + fprintf(stderr, "error unmapping msix_table! %s\n",
> strerror(errno));
> }
> - dev->msix_table_page = NULL;
> + dev->msix_table = NULL;
> }
>
> static const VMStateDescription vmstate_assigned_device = {
> diff --git a/hw/device-assignment.h b/hw/device-assignment.h
> index 8ee2274..e229303 100644
> --- a/hw/device-assignment.h
> +++ b/hw/device-assignment.h
> @@ -82,6 +82,13 @@ typedef struct {
> #define ASSIGNED_DEVICE_PREFER_MSI_MASK (1 <<
> ASSIGNED_DEVICE_PREFER_MSI_BIT)
> #define ASSIGNED_DEVICE_USE_MEM64_MASK (1 <<
> ASSIGNED_DEVICE_USE_MEM64_BIT)
>
> +typedef struct {
> + uint32_t addr_lo;
> + uint32_t addr_hi;
> + uint32_t data;
> + uint32_t ctrl;
> +} MSIXTableEntry;
> +
> typedef struct AssignedDevice {
> PCIDevice dev;
> PCIHostDevice host;
> @@ -110,7 +117,7 @@ typedef struct AssignedDevice {
> uint8_t emulate_config_write[PCI_CONFIG_SPACE_SIZE];
> int irq_entries_nr;
> struct kvm_irq_routing_entry *entry;
> - void *msix_table_page;
> + MSIXTableEntry *msix_table;
> target_phys_addr_t msix_table_addr;
> MemoryRegion mmio;
> char *configfd_name;
>
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