*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
+ *
+ * Contributions after 2012-01-13 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
*/
#include "hw.h"
+#include "msi.h"
#include "msix.h"
#include "pci.h"
#include "range.h"
-/* MSI-X capability structure */
-#define MSIX_TABLE_OFFSET 4
-#define MSIX_PBA_OFFSET 8
#define MSIX_CAP_LENGTH 12
/* MSI enable bit and maskall bit are in byte 1 in FLAGS register */
#define MSIX_ENABLE_MASK (PCI_MSIX_FLAGS_ENABLE >> 8)
#define MSIX_MASKALL_MASK (PCI_MSIX_FLAGS_MASKALL >> 8)
-/* MSI-X table format */
-#define MSIX_MSG_ADDR 0
-#define MSIX_MSG_UPPER_ADDR 4
-#define MSIX_MSG_DATA 8
-#define MSIX_VECTOR_CTRL 12
-#define MSIX_ENTRY_SIZE 16
-#define MSIX_VECTOR_MASK 0x1
-
-/* How much space does an MSIX table need. */
-/* The spec requires giving the table structure
- * a 4K aligned region all by itself. */
-#define MSIX_PAGE_SIZE 0x1000
-/* Reserve second half of the page for pending bits */
-#define MSIX_PAGE_PENDING (MSIX_PAGE_SIZE / 2)
-#define MSIX_MAX_ENTRIES 32
-
-
-/* Flag for interrupt controller to declare MSI-X support */
-int msix_supported;
-
-/* Add MSI-X capability to the config space for the device. */
-/* Given a bar and its size, add MSI-X table on top of it
- * and fill MSI-X capability in the config space.
- * Original bar size must be a power of 2 or 0.
- * New bar size is returned. */
-static int msix_add_config(struct PCIDevice *pdev, unsigned short nentries,
- unsigned bar_nr, unsigned bar_size)
-{
- int config_offset;
- uint8_t *config;
- uint32_t new_size;
-
- if (nentries < 1 || nentries > PCI_MSIX_FLAGS_QSIZE + 1)
- return -EINVAL;
- if (bar_size > 0x80000000)
- return -ENOSPC;
-
- /* Add space for MSI-X structures */
- if (!bar_size) {
- new_size = MSIX_PAGE_SIZE;
- } else if (bar_size < MSIX_PAGE_SIZE) {
- bar_size = MSIX_PAGE_SIZE;
- new_size = MSIX_PAGE_SIZE * 2;
- } else {
- new_size = bar_size * 2;
- }
-
- pdev->msix_bar_size = new_size;
- config_offset = pci_add_capability(pdev, PCI_CAP_ID_MSIX,
- 0, MSIX_CAP_LENGTH);
- if (config_offset < 0)
- return config_offset;
- config = pdev->config + config_offset;
-
- pci_set_word(config + PCI_MSIX_FLAGS, nentries - 1);
- /* Table on top of BAR */
- pci_set_long(config + MSIX_TABLE_OFFSET, bar_size | bar_nr);
- /* Pending bits on top of that */
- pci_set_long(config + MSIX_PBA_OFFSET, (bar_size + MSIX_PAGE_PENDING) |
- bar_nr);
- pdev->msix_cap = config_offset;
- /* Make flags bit writeable. */
- pdev->wmask[config_offset + MSIX_CONTROL_OFFSET] |= MSIX_ENABLE_MASK |
- MSIX_MASKALL_MASK;
- return 0;
-}
-
-static uint32_t msix_mmio_readl(void *opaque, target_phys_addr_t addr)
+static MSIMessage msix_get_message(PCIDevice *dev, unsigned vector)
{
- PCIDevice *dev = opaque;
- unsigned int offset = addr & (MSIX_PAGE_SIZE - 1) & ~0x3;
- void *page = dev->msix_table_page;
+ uint8_t *table_entry = dev->msix_table + vector * PCI_MSIX_ENTRY_SIZE;
+ MSIMessage msg;
- return pci_get_long(page + offset);
+ msg.address = pci_get_quad(table_entry + PCI_MSIX_ENTRY_LOWER_ADDR);
+ msg.data = pci_get_long(table_entry + PCI_MSIX_ENTRY_DATA);
+ return msg;
}
-static uint32_t msix_mmio_read_unallowed(void *opaque, target_phys_addr_t addr)
+/*
+ * Special API for POWER to configure the vectors through
+ * a side channel. Should never be used by devices.
+ */
+void msix_set_message(PCIDevice *dev, int vector, struct MSIMessage msg)
{
- fprintf(stderr, "MSI-X: only dword read is allowed!\n");
- return 0;
+ uint8_t *table_entry = dev->msix_table + vector * PCI_MSIX_ENTRY_SIZE;
+
+ pci_set_quad(table_entry + PCI_MSIX_ENTRY_LOWER_ADDR, msg.address);
+ pci_set_long(table_entry + PCI_MSIX_ENTRY_DATA, msg.data);
+ table_entry[PCI_MSIX_ENTRY_VECTOR_CTRL] &= ~PCI_MSIX_ENTRY_CTRL_MASKBIT;
}
static uint8_t msix_pending_mask(int vector)
static uint8_t *msix_pending_byte(PCIDevice *dev, int vector)
{
- return dev->msix_table_page + MSIX_PAGE_PENDING + vector / 8;
+ return dev->msix_pba + vector / 8;
}
static int msix_is_pending(PCIDevice *dev, int vector)
*msix_pending_byte(dev, vector) &= ~msix_pending_mask(vector);
}
-static int msix_function_masked(PCIDevice *dev)
+static bool msix_vector_masked(PCIDevice *dev, int vector, bool fmask)
{
- return dev->config[dev->msix_cap + MSIX_CONTROL_OFFSET] & MSIX_MASKALL_MASK;
+ unsigned offset = vector * PCI_MSIX_ENTRY_SIZE + PCI_MSIX_ENTRY_VECTOR_CTRL;
+ return fmask || dev->msix_table[offset] & PCI_MSIX_ENTRY_CTRL_MASKBIT;
}
-static int msix_is_masked(PCIDevice *dev, int vector)
+static bool msix_is_masked(PCIDevice *dev, int vector)
{
- unsigned offset = vector * MSIX_ENTRY_SIZE + MSIX_VECTOR_CTRL;
- return msix_function_masked(dev) ||
- dev->msix_table_page[offset] & MSIX_VECTOR_MASK;
+ return msix_vector_masked(dev, vector, dev->msix_function_masked);
}
-static void msix_handle_mask_update(PCIDevice *dev, int vector)
+static void msix_fire_vector_notifier(PCIDevice *dev,
+ unsigned int vector, bool is_masked)
{
- if (!msix_is_masked(dev, vector) && msix_is_pending(dev, vector)) {
+ MSIMessage msg;
+ int ret;
+
+ if (!dev->msix_vector_use_notifier) {
+ return;
+ }
+ if (is_masked) {
+ dev->msix_vector_release_notifier(dev, vector);
+ } else {
+ msg = msix_get_message(dev, vector);
+ ret = dev->msix_vector_use_notifier(dev, vector, msg);
+ assert(ret >= 0);
+ }
+}
+
+static void msix_handle_mask_update(PCIDevice *dev, int vector, bool was_masked)
+{
+ bool is_masked = msix_is_masked(dev, vector);
+
+ if (is_masked == was_masked) {
+ return;
+ }
+
+ msix_fire_vector_notifier(dev, vector, is_masked);
+
+ if (!is_masked && msix_is_pending(dev, vector)) {
msix_clr_pending(dev, vector);
msix_notify(dev, vector);
}
}
+static void msix_update_function_masked(PCIDevice *dev)
+{
+ dev->msix_function_masked = !msix_enabled(dev) ||
+ (dev->config[dev->msix_cap + MSIX_CONTROL_OFFSET] & MSIX_MASKALL_MASK);
+}
+
/* Handle MSI-X capability config write. */
void msix_write_config(PCIDevice *dev, uint32_t addr,
uint32_t val, int len)
{
unsigned enable_pos = dev->msix_cap + MSIX_CONTROL_OFFSET;
int vector;
+ bool was_masked;
- if (!range_covers_byte(addr, len, enable_pos)) {
+ if (!msix_present(dev) || !range_covers_byte(addr, len, enable_pos)) {
return;
}
+ was_masked = dev->msix_function_masked;
+ msix_update_function_masked(dev);
+
if (!msix_enabled(dev)) {
return;
}
pci_device_deassert_intx(dev);
- if (msix_function_masked(dev)) {
+ if (dev->msix_function_masked == was_masked) {
return;
}
for (vector = 0; vector < dev->msix_entries_nr; ++vector) {
- msix_handle_mask_update(dev, vector);
+ msix_handle_mask_update(dev, vector,
+ msix_vector_masked(dev, vector, was_masked));
}
}
-static void msix_mmio_writel(void *opaque, target_phys_addr_t addr,
- uint32_t val)
+static uint64_t msix_table_mmio_read(void *opaque, target_phys_addr_t addr,
+ unsigned size)
{
PCIDevice *dev = opaque;
- unsigned int offset = addr & (MSIX_PAGE_SIZE - 1) & ~0x3;
- int vector = offset / MSIX_ENTRY_SIZE;
- pci_set_long(dev->msix_table_page + offset, val);
- msix_handle_mask_update(dev, vector);
+
+ return pci_get_long(dev->msix_table + addr);
}
-static void msix_mmio_write_unallowed(void *opaque, target_phys_addr_t addr,
- uint32_t val)
+static void msix_table_mmio_write(void *opaque, target_phys_addr_t addr,
+ uint64_t val, unsigned size)
{
- fprintf(stderr, "MSI-X: only dword write is allowed!\n");
-}
+ PCIDevice *dev = opaque;
+ int vector = addr / PCI_MSIX_ENTRY_SIZE;
+ bool was_masked;
-static CPUWriteMemoryFunc * const msix_mmio_write[] = {
- msix_mmio_write_unallowed, msix_mmio_write_unallowed, msix_mmio_writel
-};
+ was_masked = msix_is_masked(dev, vector);
+ pci_set_long(dev->msix_table + addr, val);
+ msix_handle_mask_update(dev, vector, was_masked);
+}
-static CPUReadMemoryFunc * const msix_mmio_read[] = {
- msix_mmio_read_unallowed, msix_mmio_read_unallowed, msix_mmio_readl
+static const MemoryRegionOps msix_table_mmio_ops = {
+ .read = msix_table_mmio_read,
+ .write = msix_table_mmio_write,
+ /* TODO: MSIX should be LITTLE_ENDIAN. */
+ .endianness = DEVICE_NATIVE_ENDIAN,
+ .valid = {
+ .min_access_size = 4,
+ .max_access_size = 4,
+ },
};
-/* Should be called from device's map method. */
-void msix_mmio_map(PCIDevice *d, int region_num,
- pcibus_t addr, pcibus_t size, int type)
+static uint64_t msix_pba_mmio_read(void *opaque, target_phys_addr_t addr,
+ unsigned size)
{
- uint8_t *config = d->config + d->msix_cap;
- uint32_t table = pci_get_long(config + MSIX_TABLE_OFFSET);
- uint32_t offset = table & ~(MSIX_PAGE_SIZE - 1);
- /* TODO: for assigned devices, we'll want to make it possible to map
- * pending bits separately in case they are in a separate bar. */
- int table_bir = table & PCI_MSIX_FLAGS_BIRMASK;
+ PCIDevice *dev = opaque;
- if (table_bir != region_num)
- return;
- if (size <= offset)
- return;
- cpu_register_physical_memory(addr + offset, size - offset,
- d->msix_mmio_index);
+ return pci_get_long(dev->msix_pba + addr);
}
+static const MemoryRegionOps msix_pba_mmio_ops = {
+ .read = msix_pba_mmio_read,
+ /* TODO: MSIX should be LITTLE_ENDIAN. */
+ .endianness = DEVICE_NATIVE_ENDIAN,
+ .valid = {
+ .min_access_size = 4,
+ .max_access_size = 4,
+ },
+};
+
static void msix_mask_all(struct PCIDevice *dev, unsigned nentries)
{
int vector;
+
for (vector = 0; vector < nentries; ++vector) {
- unsigned offset = vector * MSIX_ENTRY_SIZE + MSIX_VECTOR_CTRL;
- dev->msix_table_page[offset] |= MSIX_VECTOR_MASK;
+ unsigned offset =
+ vector * PCI_MSIX_ENTRY_SIZE + PCI_MSIX_ENTRY_VECTOR_CTRL;
+ bool was_masked = msix_is_masked(dev, vector);
+
+ dev->msix_table[offset] |= PCI_MSIX_ENTRY_CTRL_MASKBIT;
+ msix_handle_mask_update(dev, vector, was_masked);
}
}
-/* Initialize the MSI-X structures. Note: if MSI-X is supported, BAR size is
- * modified, it should be retrieved with msix_bar_size. */
+/* Initialize the MSI-X structures */
int msix_init(struct PCIDevice *dev, unsigned short nentries,
- unsigned bar_nr, unsigned bar_size)
+ MemoryRegion *table_bar, uint8_t table_bar_nr,
+ unsigned table_offset, MemoryRegion *pba_bar,
+ uint8_t pba_bar_nr, unsigned pba_offset, uint8_t cap_pos)
{
- int ret;
+ int cap;
+ unsigned table_size, pba_size;
+ uint8_t *config;
+
/* Nothing to do if MSI is not supported by interrupt controller */
- if (!msix_supported)
+ if (!msi_supported) {
return -ENOTSUP;
+ }
- if (nentries > MSIX_MAX_ENTRIES)
+ if (nentries < 1 || nentries > PCI_MSIX_FLAGS_QSIZE + 1) {
return -EINVAL;
+ }
- dev->msix_entry_used = qemu_mallocz(MSIX_MAX_ENTRIES *
- sizeof *dev->msix_entry_used);
+ table_size = nentries * PCI_MSIX_ENTRY_SIZE;
+ pba_size = QEMU_ALIGN_UP(nentries, 64) / 8;
- dev->msix_table_page = qemu_mallocz(MSIX_PAGE_SIZE);
- msix_mask_all(dev, nentries);
+ /* Sanity test: table & pba don't overlap, fit within BARs, min aligned */
+ if ((table_bar_nr == pba_bar_nr &&
+ ranges_overlap(table_offset, table_size, pba_offset, pba_size)) ||
+ table_offset + table_size > memory_region_size(table_bar) ||
+ pba_offset + pba_size > memory_region_size(pba_bar) ||
+ (table_offset | pba_offset) & PCI_MSIX_FLAGS_BIRMASK) {
+ return -EINVAL;
+ }
- dev->msix_mmio_index = cpu_register_io_memory(msix_mmio_read,
- msix_mmio_write, dev,
- DEVICE_NATIVE_ENDIAN);
- if (dev->msix_mmio_index == -1) {
- ret = -EBUSY;
- goto err_index;
+ cap = pci_add_capability(dev, PCI_CAP_ID_MSIX, cap_pos, MSIX_CAP_LENGTH);
+ if (cap < 0) {
+ return cap;
}
+ dev->msix_cap = cap;
+ dev->cap_present |= QEMU_PCI_CAP_MSIX;
+ config = dev->config + cap;
+
+ pci_set_word(config + PCI_MSIX_FLAGS, nentries - 1);
dev->msix_entries_nr = nentries;
- ret = msix_add_config(dev, nentries, bar_nr, bar_size);
- if (ret)
- goto err_config;
+ dev->msix_function_masked = true;
+
+ pci_set_long(config + PCI_MSIX_TABLE, table_offset | table_bar_nr);
+ pci_set_long(config + PCI_MSIX_PBA, pba_offset | pba_bar_nr);
+
+ /* Make flags bit writable. */
+ dev->wmask[cap + MSIX_CONTROL_OFFSET] |= MSIX_ENABLE_MASK |
+ MSIX_MASKALL_MASK;
+
+ dev->msix_table = g_malloc0(table_size);
+ dev->msix_pba = g_malloc0(pba_size);
+ dev->msix_entry_used = g_malloc0(nentries * sizeof *dev->msix_entry_used);
+
+ msix_mask_all(dev, nentries);
+
+ memory_region_init_io(&dev->msix_table_mmio, &msix_table_mmio_ops, dev,
+ "msix-table", table_size);
+ memory_region_add_subregion(table_bar, table_offset, &dev->msix_table_mmio);
+ memory_region_init_io(&dev->msix_pba_mmio, &msix_pba_mmio_ops, dev,
+ "msix-pba", pba_size);
+ memory_region_add_subregion(pba_bar, pba_offset, &dev->msix_pba_mmio);
- dev->cap_present |= QEMU_PCI_CAP_MSIX;
return 0;
+}
-err_config:
- dev->msix_entries_nr = 0;
- cpu_unregister_io_memory(dev->msix_mmio_index);
-err_index:
- qemu_free(dev->msix_table_page);
- dev->msix_table_page = NULL;
- qemu_free(dev->msix_entry_used);
- dev->msix_entry_used = NULL;
- return ret;
+int msix_init_exclusive_bar(PCIDevice *dev, unsigned short nentries,
+ uint8_t bar_nr)
+{
+ int ret;
+ char *name;
+
+ /*
+ * Migration compatibility dictates that this remains a 4k
+ * BAR with the vector table in the lower half and PBA in
+ * the upper half. Do not use these elsewhere!
+ */
+#define MSIX_EXCLUSIVE_BAR_SIZE 4096
+#define MSIX_EXCLUSIVE_BAR_TABLE_OFFSET 0
+#define MSIX_EXCLUSIVE_BAR_PBA_OFFSET (MSIX_EXCLUSIVE_BAR_SIZE / 2)
+#define MSIX_EXCLUSIVE_CAP_OFFSET 0
+
+ if (nentries * PCI_MSIX_ENTRY_SIZE > MSIX_EXCLUSIVE_BAR_PBA_OFFSET) {
+ return -EINVAL;
+ }
+
+ name = g_strdup_printf("%s-msix", dev->name);
+ memory_region_init(&dev->msix_exclusive_bar, name, MSIX_EXCLUSIVE_BAR_SIZE);
+ g_free(name);
+
+ ret = msix_init(dev, nentries, &dev->msix_exclusive_bar, bar_nr,
+ MSIX_EXCLUSIVE_BAR_TABLE_OFFSET, &dev->msix_exclusive_bar,
+ bar_nr, MSIX_EXCLUSIVE_BAR_PBA_OFFSET,
+ MSIX_EXCLUSIVE_CAP_OFFSET);
+ if (ret) {
+ memory_region_destroy(&dev->msix_exclusive_bar);
+ return ret;
+ }
+
+ pci_register_bar(dev, bar_nr, PCI_BASE_ADDRESS_SPACE_MEMORY,
+ &dev->msix_exclusive_bar);
+
+ return 0;
}
static void msix_free_irq_entries(PCIDevice *dev)
}
}
+static void msix_clear_all_vectors(PCIDevice *dev)
+{
+ int vector;
+
+ for (vector = 0; vector < dev->msix_entries_nr; ++vector) {
+ msix_clr_pending(dev, vector);
+ }
+}
+
/* Clean up resources for the device. */
-int msix_uninit(PCIDevice *dev)
+void msix_uninit(PCIDevice *dev, MemoryRegion *table_bar, MemoryRegion *pba_bar)
{
- if (!(dev->cap_present & QEMU_PCI_CAP_MSIX))
- return 0;
+ if (!msix_present(dev)) {
+ return;
+ }
pci_del_capability(dev, PCI_CAP_ID_MSIX, MSIX_CAP_LENGTH);
dev->msix_cap = 0;
msix_free_irq_entries(dev);
dev->msix_entries_nr = 0;
- cpu_unregister_io_memory(dev->msix_mmio_index);
- qemu_free(dev->msix_table_page);
- dev->msix_table_page = NULL;
- qemu_free(dev->msix_entry_used);
+ memory_region_del_subregion(pba_bar, &dev->msix_pba_mmio);
+ memory_region_destroy(&dev->msix_pba_mmio);
+ g_free(dev->msix_pba);
+ dev->msix_pba = NULL;
+ memory_region_del_subregion(table_bar, &dev->msix_table_mmio);
+ memory_region_destroy(&dev->msix_table_mmio);
+ g_free(dev->msix_table);
+ dev->msix_table = NULL;
+ g_free(dev->msix_entry_used);
dev->msix_entry_used = NULL;
dev->cap_present &= ~QEMU_PCI_CAP_MSIX;
- return 0;
+ return;
+}
+
+void msix_uninit_exclusive_bar(PCIDevice *dev)
+{
+ if (msix_present(dev)) {
+ msix_uninit(dev, &dev->msix_exclusive_bar, &dev->msix_exclusive_bar);
+ memory_region_destroy(&dev->msix_exclusive_bar);
+ }
}
void msix_save(PCIDevice *dev, QEMUFile *f)
{
unsigned n = dev->msix_entries_nr;
- if (!(dev->cap_present & QEMU_PCI_CAP_MSIX)) {
+ if (!msix_present(dev)) {
return;
}
- qemu_put_buffer(f, dev->msix_table_page, n * MSIX_ENTRY_SIZE);
- qemu_put_buffer(f, dev->msix_table_page + MSIX_PAGE_PENDING, (n + 7) / 8);
+ qemu_put_buffer(f, dev->msix_table, n * PCI_MSIX_ENTRY_SIZE);
+ qemu_put_buffer(f, dev->msix_pba, (n + 7) / 8);
}
/* Should be called after restoring the config space. */
void msix_load(PCIDevice *dev, QEMUFile *f)
{
unsigned n = dev->msix_entries_nr;
+ unsigned int vector;
- if (!(dev->cap_present & QEMU_PCI_CAP_MSIX)) {
+ if (!msix_present(dev)) {
return;
}
- msix_free_irq_entries(dev);
- qemu_get_buffer(f, dev->msix_table_page, n * MSIX_ENTRY_SIZE);
- qemu_get_buffer(f, dev->msix_table_page + MSIX_PAGE_PENDING, (n + 7) / 8);
+ msix_clear_all_vectors(dev);
+ qemu_get_buffer(f, dev->msix_table, n * PCI_MSIX_ENTRY_SIZE);
+ qemu_get_buffer(f, dev->msix_pba, (n + 7) / 8);
+ msix_update_function_masked(dev);
+
+ for (vector = 0; vector < n; vector++) {
+ msix_handle_mask_update(dev, vector, true);
+ }
}
/* Does device support MSI-X? */
MSIX_ENABLE_MASK);
}
-/* Size of bar where MSI-X table resides, or 0 if MSI-X not supported. */
-uint32_t msix_bar_size(PCIDevice *dev)
-{
- return (dev->cap_present & QEMU_PCI_CAP_MSIX) ?
- dev->msix_bar_size : 0;
-}
-
/* Send an MSI-X message */
void msix_notify(PCIDevice *dev, unsigned vector)
{
- uint8_t *table_entry = dev->msix_table_page + vector * MSIX_ENTRY_SIZE;
- uint64_t address;
- uint32_t data;
+ MSIMessage msg;
if (vector >= dev->msix_entries_nr || !dev->msix_entry_used[vector])
return;
return;
}
- address = pci_get_long(table_entry + MSIX_MSG_UPPER_ADDR);
- address = (address << 32) | pci_get_long(table_entry + MSIX_MSG_ADDR);
- data = pci_get_long(table_entry + MSIX_MSG_DATA);
- stl_phys(address, data);
+ msg = msix_get_message(dev, vector);
+
+ stl_le_phys(msg.address, msg.data);
}
void msix_reset(PCIDevice *dev)
{
- if (!(dev->cap_present & QEMU_PCI_CAP_MSIX))
+ if (!msix_present(dev)) {
return;
- msix_free_irq_entries(dev);
+ }
+ msix_clear_all_vectors(dev);
dev->config[dev->msix_cap + MSIX_CONTROL_OFFSET] &=
~dev->wmask[dev->msix_cap + MSIX_CONTROL_OFFSET];
- memset(dev->msix_table_page, 0, MSIX_PAGE_SIZE);
+ memset(dev->msix_table, 0, dev->msix_entries_nr * PCI_MSIX_ENTRY_SIZE);
+ memset(dev->msix_pba, 0, QEMU_ALIGN_UP(dev->msix_entries_nr, 64) / 8);
msix_mask_all(dev, dev->msix_entries_nr);
}
void msix_unuse_all_vectors(PCIDevice *dev)
{
- if (!(dev->cap_present & QEMU_PCI_CAP_MSIX))
+ if (!msix_present(dev)) {
return;
+ }
msix_free_irq_entries(dev);
}
+
+unsigned int msix_nr_vectors_allocated(const PCIDevice *dev)
+{
+ return dev->msix_entries_nr;
+}
+
+static int msix_set_notifier_for_vector(PCIDevice *dev, unsigned int vector)
+{
+ MSIMessage msg;
+
+ if (msix_is_masked(dev, vector)) {
+ return 0;
+ }
+ msg = msix_get_message(dev, vector);
+ return dev->msix_vector_use_notifier(dev, vector, msg);
+}
+
+static void msix_unset_notifier_for_vector(PCIDevice *dev, unsigned int vector)
+{
+ if (msix_is_masked(dev, vector)) {
+ return;
+ }
+ dev->msix_vector_release_notifier(dev, vector);
+}
+
+int msix_set_vector_notifiers(PCIDevice *dev,
+ MSIVectorUseNotifier use_notifier,
+ MSIVectorReleaseNotifier release_notifier)
+{
+ int vector, ret;
+
+ assert(use_notifier && release_notifier);
+
+ dev->msix_vector_use_notifier = use_notifier;
+ dev->msix_vector_release_notifier = release_notifier;
+
+ if ((dev->config[dev->msix_cap + MSIX_CONTROL_OFFSET] &
+ (MSIX_ENABLE_MASK | MSIX_MASKALL_MASK)) == MSIX_ENABLE_MASK) {
+ for (vector = 0; vector < dev->msix_entries_nr; vector++) {
+ ret = msix_set_notifier_for_vector(dev, vector);
+ if (ret < 0) {
+ goto undo;
+ }
+ }
+ }
+ return 0;
+
+undo:
+ while (--vector >= 0) {
+ msix_unset_notifier_for_vector(dev, vector);
+ }
+ dev->msix_vector_use_notifier = NULL;
+ dev->msix_vector_release_notifier = NULL;
+ return ret;
+}
+
+void msix_unset_vector_notifiers(PCIDevice *dev)
+{
+ int vector;
+
+ assert(dev->msix_vector_use_notifier &&
+ dev->msix_vector_release_notifier);
+
+ if ((dev->config[dev->msix_cap + MSIX_CONTROL_OFFSET] &
+ (MSIX_ENABLE_MASK | MSIX_MASKALL_MASK)) == MSIX_ENABLE_MASK) {
+ for (vector = 0; vector < dev->msix_entries_nr; vector++) {
+ msix_unset_notifier_for_vector(dev, vector);
+ }
+ }
+ dev->msix_vector_use_notifier = NULL;
+ dev->msix_vector_release_notifier = NULL;
+}
projects / qemu.git / blobdiff