[Qemu-devel] [PATCH v2 8/9] msix: Align MSI-X constants to libpci definitions and extend them

[Jan Kiszka]

Add PCI_MSIX_TABLE and PCI_MSIX_PBA, align other MSIX related constant
names to libpci style. Will be used for device assignment code in
qemu-kvm.

Signed-off-by: Jan Kiszka <address@hidden>
---
 hw/msix.c     |   24 +++++++++++-------------
 hw/pci_regs.h |   14 ++++++++------
 2 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/hw/msix.c b/hw/msix.c
index 600f5fb..b20cf7c 100644
--- a/hw/msix.c
+++ b/hw/msix.c
@@ -16,15 +16,12 @@
 #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_CONTROL_OFFSET (PCI_MSIX_FLAGS + 1)
-#define MSIX_ENABLE_MASK (PCI_MSIX_FLAGS_ENABLE >> 8)
-#define MSIX_MASKALL_MASK (PCI_MSIX_FLAGS_MASKALL >> 8)
+/* MSI enable bit and maskall bit are in byte 1 in control register */
+#define MSIX_CONTROL_OFFSET (PCI_MSIX_CTRL + 1)
+#define MSIX_ENABLE_MASK (PCI_MSIX_ENABLE >> 8)
+#define MSIX_MASKALL_MASK (PCI_MSIX_MASK >> 8)
 
 /* MSI-X table format */
 #define MSIX_MSG_ADDR 0
@@ -58,8 +55,9 @@ static int msix_add_config(struct PCIDevice *pdev, unsigned 
short nentries,
     uint8_t *config;
     uint32_t new_size;
 
-    if (nentries < 1 || nentries > PCI_MSIX_FLAGS_QSIZE + 1)
+    if (nentries < 1 || nentries > PCI_MSIX_TABSIZE + 1) {
         return -EINVAL;
+    }
     if (bar_size > 0x80000000)
         return -ENOSPC;
 
@@ -80,11 +78,11 @@ static int msix_add_config(struct PCIDevice *pdev, unsigned 
short nentries,
         return config_offset;
     config = pdev->config + config_offset;
 
-    pci_set_word(config + PCI_MSIX_FLAGS, nentries - 1);
+    pci_set_word(config + PCI_MSIX_CTRL, nentries - 1);
     /* Table on top of BAR */
-    pci_set_long(config + MSIX_TABLE_OFFSET, bar_size | bar_nr);
+    pci_set_long(config + PCI_MSIX_TABLE, bar_size | bar_nr);
     /* Pending bits on top of that */
-    pci_set_long(config + MSIX_PBA_OFFSET, (bar_size + MSIX_PAGE_PENDING) |
+    pci_set_long(config + PCI_MSIX_PBA, (bar_size + MSIX_PAGE_PENDING) |
                  bar_nr);
     pdev->msix_cap = config_offset;
     /* Make flags bit writable. */
@@ -208,11 +206,11 @@ void msix_mmio_map(PCIDevice *d, int region_num,
                    pcibus_t addr, pcibus_t size, int type)
 {
     uint8_t *config = d->config + d->msix_cap;
-    uint32_t table = pci_get_long(config + MSIX_TABLE_OFFSET);
+    uint32_t table = pci_get_long(config + PCI_MSIX_TABLE);
     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;
+    int table_bir = table & PCI_MSIX_BIR;
 
     if (table_bir != region_num)
         return;
diff --git a/hw/pci_regs.h b/hw/pci_regs.h
index 5a5ab89..c17c22f 100644
--- a/hw/pci_regs.h
+++ b/hw/pci_regs.h
@@ -300,12 +300,14 @@
 #define PCI_MSI_DATA_64                12      /* 16 bits of data for 64-bit 
devices */
 #define PCI_MSI_MASK_64                16      /* Mask bits register for 
64-bit devices */
 
-/* MSI-X registers (these are at offset PCI_MSIX_FLAGS) */
-#define PCI_MSIX_FLAGS         2
-#define  PCI_MSIX_FLAGS_QSIZE  0x7FF
-#define  PCI_MSIX_FLAGS_ENABLE (1 << 15)
-#define  PCI_MSIX_FLAGS_MASKALL        (1 << 14)
-#define PCI_MSIX_FLAGS_BIRMASK (7 << 0)
+/* MSI-X registers */
+#define PCI_MSIX_CTRL           2       /* Message control */
+#define  PCI_MSIX_TABSIZE       0x7FF   /* Table size - 1 */
+#define  PCI_MSIX_MASK          0x4000  /* Mask all vectors */
+#define  PCI_MSIX_ENABLE        0x8000  /* Enable MSI-X */
+#define PCI_MSIX_TABLE          4       /* MSI-X table */
+#define PCI_MSIX_PBA            8       /* Pending bit array */
+#define  PCI_MSIX_BIR           0x7     /* BAR indication register */
 
 /* CompactPCI Hotswap Register */
 
-- 
1.7.1