+void aac_define_int_mode(struct aac_dev *dev)
+{
+ int i, msi_count;
+
+ msi_count = i = 0;
+ /* max. vectors from GET_COMM_PREFERRED_SETTINGS */
+ if (dev->max_msix == 0 ||
+ dev->pdev->device == PMC_DEVICE_S6 ||
+ dev->sync_mode) {
+ dev->max_msix = 1;
+ dev->vector_cap =
+ dev->scsi_host_ptr->can_queue +
+ AAC_NUM_MGT_FIB;
+ return;
+ }
+
+ /* Don't bother allocating more MSI-X vectors than cpus */
+ msi_count = min(dev->max_msix,
+ (unsigned int)num_online_cpus());
+
+ dev->max_msix = msi_count;
+
+ if (msi_count > AAC_MAX_MSIX)
+ msi_count = AAC_MAX_MSIX;
+
+ for (i = 0; i < msi_count; i++)
+ dev->msixentry[i].entry = i;
+
+ if (msi_count > 1 &&
+ pci_find_capability(dev->pdev, PCI_CAP_ID_MSIX)) {
+ i = pci_enable_msix(dev->pdev,
+ dev->msixentry,
+ msi_count);
+ /* Check how many MSIX vectors are allocated */
+ if (i >= 0) {
+ dev->msi_enabled = 1;
+ if (i) {
+ msi_count = i;
+ if (pci_enable_msix(dev->pdev,
+ dev->msixentry,
+ msi_count)) {
+ dev->msi_enabled = 0;
+ printk(KERN_ERR "%s%d: MSIX not supported!! Will try MSI 0x%x.\n",
+ dev->name, dev->id, i);
+ }
+ }
+ } else {
+ dev->msi_enabled = 0;
+ printk(KERN_ERR "%s%d: MSIX not supported!! Will try MSI 0x%x.\n",
+ dev->name, dev->id, i);
+ }
+ }
+
+ if (!dev->msi_enabled) {
+ msi_count = 1;
+ i = pci_enable_msi(dev->pdev);
+
+ if (!i) {
+ dev->msi_enabled = 1;
+ dev->msi = 1;
+ } else {
+ printk(KERN_ERR "%s%d: MSI not supported!! Will try INTx 0x%x.\n",
+ dev->name, dev->id, i);
+ }
+ }
+
+ if (!dev->msi_enabled)
+ dev->max_msix = msi_count = 1;
+ else {
+ if (dev->max_msix > msi_count)
+ dev->max_msix = msi_count;
+ }
+ dev->vector_cap =
+ (dev->scsi_host_ptr->can_queue + AAC_NUM_MGT_FIB) /
+ msi_count;
+}