static int tsi721_enable_msix()

in devices/tsi721.c [721:821]

• 75 lines of code
• 6 McCabe index (conditional complexity)

static int tsi721_enable_msix(struct tsi721_device *priv)
{
	struct msix_entry entries[TSI721_VECT_MAX];
	int err;
	int i;

	entries[TSI721_VECT_IDB].entry = TSI721_MSIX_SR2PC_IDBQ_RCV(IDB_QUEUE);
	entries[TSI721_VECT_PWRX].entry = TSI721_MSIX_SRIO_MAC_INT;

	/*
	 * Initialize MSI-X entries for Messaging Engine:
	 * this driver supports four RIO mailboxes (inbound and outbound)
	 * NOTE: Inbound message MBOX 0...4 use IB channels 4...7. Therefore
	 * offset +4 is added to IB MBOX number.
	 */
	for (i = 0; i < RIO_MAX_MBOX; i++) {
		entries[TSI721_VECT_IMB0_RCV + i].entry =
					TSI721_MSIX_IMSG_DQ_RCV(i + 4);
		entries[TSI721_VECT_IMB0_INT + i].entry =
					TSI721_MSIX_IMSG_INT(i + 4);
		entries[TSI721_VECT_OMB0_DONE + i].entry =
					TSI721_MSIX_OMSG_DONE(i);
		entries[TSI721_VECT_OMB0_INT + i].entry =
					TSI721_MSIX_OMSG_INT(i);
	}

#ifdef CONFIG_RAPIDIO_DMA_ENGINE
	/*
	 * Initialize MSI-X entries for Block DMA Engine:
	 * this driver supports XXX DMA channels
	 * (one is reserved for SRIO maintenance transactions)
	 */
	for (i = 0; i < TSI721_DMA_CHNUM; i++) {
		entries[TSI721_VECT_DMA0_DONE + i].entry =
					TSI721_MSIX_DMACH_DONE(i);
		entries[TSI721_VECT_DMA0_INT + i].entry =
					TSI721_MSIX_DMACH_INT(i);
	}
#endif /* CONFIG_RAPIDIO_DMA_ENGINE */

	err = pci_enable_msix_exact(priv->pdev, entries, ARRAY_SIZE(entries));
	if (err) {
		tsi_err(&priv->pdev->dev,
			"Failed to enable MSI-X (err=%d)", err);
		return err;
	}

	/*
	 * Copy MSI-X vector information into tsi721 private structure
	 */
	priv->msix[TSI721_VECT_IDB].vector = entries[TSI721_VECT_IDB].vector;
	snprintf(priv->msix[TSI721_VECT_IDB].irq_name, IRQ_DEVICE_NAME_MAX,
		 DRV_NAME "-idb@pci:%s", pci_name(priv->pdev));
	priv->msix[TSI721_VECT_PWRX].vector = entries[TSI721_VECT_PWRX].vector;
	snprintf(priv->msix[TSI721_VECT_PWRX].irq_name, IRQ_DEVICE_NAME_MAX,
		 DRV_NAME "-pwrx@pci:%s", pci_name(priv->pdev));

	for (i = 0; i < RIO_MAX_MBOX; i++) {
		priv->msix[TSI721_VECT_IMB0_RCV + i].vector =
				entries[TSI721_VECT_IMB0_RCV + i].vector;
		snprintf(priv->msix[TSI721_VECT_IMB0_RCV + i].irq_name,
			 IRQ_DEVICE_NAME_MAX, DRV_NAME "-imbr%d@pci:%s",
			 i, pci_name(priv->pdev));

		priv->msix[TSI721_VECT_IMB0_INT + i].vector =
				entries[TSI721_VECT_IMB0_INT + i].vector;
		snprintf(priv->msix[TSI721_VECT_IMB0_INT + i].irq_name,
			 IRQ_DEVICE_NAME_MAX, DRV_NAME "-imbi%d@pci:%s",
			 i, pci_name(priv->pdev));

		priv->msix[TSI721_VECT_OMB0_DONE + i].vector =
				entries[TSI721_VECT_OMB0_DONE + i].vector;
		snprintf(priv->msix[TSI721_VECT_OMB0_DONE + i].irq_name,
			 IRQ_DEVICE_NAME_MAX, DRV_NAME "-ombd%d@pci:%s",
			 i, pci_name(priv->pdev));

		priv->msix[TSI721_VECT_OMB0_INT + i].vector =
				entries[TSI721_VECT_OMB0_INT + i].vector;
		snprintf(priv->msix[TSI721_VECT_OMB0_INT + i].irq_name,
			 IRQ_DEVICE_NAME_MAX, DRV_NAME "-ombi%d@pci:%s",
			 i, pci_name(priv->pdev));
	}

#ifdef CONFIG_RAPIDIO_DMA_ENGINE
	for (i = 0; i < TSI721_DMA_CHNUM; i++) {
		priv->msix[TSI721_VECT_DMA0_DONE + i].vector =
				entries[TSI721_VECT_DMA0_DONE + i].vector;
		snprintf(priv->msix[TSI721_VECT_DMA0_DONE + i].irq_name,
			 IRQ_DEVICE_NAME_MAX, DRV_NAME "-dmad%d@pci:%s",
			 i, pci_name(priv->pdev));

		priv->msix[TSI721_VECT_DMA0_INT + i].vector =
				entries[TSI721_VECT_DMA0_INT + i].vector;
		snprintf(priv->msix[TSI721_VECT_DMA0_INT + i].irq_name,
			 IRQ_DEVICE_NAME_MAX, DRV_NAME "-dmai%d@pci:%s",
			 i, pci_name(priv->pdev));
	}
#endif /* CONFIG_RAPIDIO_DMA_ENGINE */

	return 0;
}