linux/drivers/infiniband/hw/hfi1/msix.c

// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
/*
 * Copyright(c) 2018 - 2020 Intel Corporation.
 */

#include "hfi.h"
#include "affinity.h"
#include "sdma.h"
#include "netdev.h"

/**
 * msix_initialize() - Calculate, request and configure MSIx IRQs
 * @dd: valid hfi1 devdata
 *
 */
int msix_initialize(struct hfi1_devdata *dd)
{ … }

/**
 * msix_request_irq() - Allocate a free MSIx IRQ
 * @dd: valid devdata
 * @arg: context information for the IRQ
 * @handler: IRQ handler
 * @thread: IRQ thread handler (could be NULL)
 * @type: affinty IRQ type
 * @name: IRQ name
 *
 * Allocated an MSIx vector if available, and then create the appropriate
 * meta data needed to keep track of the pci IRQ request.
 *
 * Return:
 *   < 0   Error
 *   >= 0  MSIx vector
 *
 */
static int msix_request_irq(struct hfi1_devdata *dd, void *arg,
			    irq_handler_t handler, irq_handler_t thread,
			    enum irq_type type, const char *name)
{ … }

static int msix_request_rcd_irq_common(struct hfi1_ctxtdata *rcd,
				       irq_handler_t handler,
				       irq_handler_t thread,
				       const char *name)
{ … }

/**
 * msix_request_rcd_irq() - Helper function for RCVAVAIL IRQs
 * @rcd: valid rcd context
 *
 */
int msix_request_rcd_irq(struct hfi1_ctxtdata *rcd)
{ … }

/**
 * msix_netdev_request_rcd_irq  - Helper function for RCVAVAIL IRQs
 * for netdev context
 * @rcd: valid netdev contexti
 */
int msix_netdev_request_rcd_irq(struct hfi1_ctxtdata *rcd)
{ … }

/**
 * msix_request_sdma_irq  - Helper for getting SDMA IRQ resources
 * @sde: valid sdma engine
 *
 */
int msix_request_sdma_irq(struct sdma_engine *sde)
{ … }

/**
 * msix_request_general_irq - Helper for getting general IRQ
 * resources
 * @dd: valid device data
 */
int msix_request_general_irq(struct hfi1_devdata *dd)
{ … }

/**
 * enable_sdma_srcs - Helper to enable SDMA IRQ srcs
 * @dd: valid devdata structure
 * @i: index of SDMA engine
 */
static void enable_sdma_srcs(struct hfi1_devdata *dd, int i)
{ … }

/**
 * msix_request_irqs() - Allocate all MSIx IRQs
 * @dd: valid devdata structure
 *
 * Helper function to request the used MSIx IRQs.
 *
 */
int msix_request_irqs(struct hfi1_devdata *dd)
{ … }

/**
 * msix_free_irq() - Free the specified MSIx resources and IRQ
 * @dd: valid devdata
 * @msix_intr: MSIx vector to free.
 *
 */
void msix_free_irq(struct hfi1_devdata *dd, u8 msix_intr)
{ … }

/**
 * msix_clean_up_interrupts  - Free all MSIx IRQ resources
 * @dd: valid device data data structure
 *
 * Free the MSIx and associated PCI resources, if they have been allocated.
 */
void msix_clean_up_interrupts(struct hfi1_devdata *dd)
{ … }

/**
 * msix_netdev_synchronize_irq - netdev IRQ synchronize
 * @dd: valid devdata
 */
void msix_netdev_synchronize_irq(struct hfi1_devdata *dd)
{ … }