drivers/scsi/bfa/bfa_hw_ct.c

Source file repositories/reference/linux-study-clean/drivers/scsi/bfa/bfa_hw_ct.c

File Facts

System
Linux kernel
Corpus path
drivers/scsi/bfa/bfa_hw_ct.c
Extension
.c
Size
3763 bytes
Lines
170
Domain
Driver Families
Bucket
drivers/scsi
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2005-2014 Brocade Communications Systems, Inc.
 * Copyright (c) 2014- QLogic Corporation.
 * All rights reserved
 * www.qlogic.com
 *
 * Linux driver for QLogic BR-series Fibre Channel Host Bus Adapter.
 */

#include "bfad_drv.h"
#include "bfa_modules.h"
#include "bfi_reg.h"

BFA_TRC_FILE(HAL, IOCFC_CT);

/*
 * Dummy interrupt handler for handling spurious interrupt during chip-reinit.
 */
static void
bfa_hwct_msix_dummy(struct bfa_s *bfa, int vec)
{
}

void
bfa_hwct_reginit(struct bfa_s *bfa)
{
	struct bfa_iocfc_regs_s	*bfa_regs = &bfa->iocfc.bfa_regs;
	void __iomem *kva = bfa_ioc_bar0(&bfa->ioc);
	int	fn = bfa_ioc_pcifn(&bfa->ioc);

	if (fn == 0) {
		bfa_regs->intr_status = (kva + HOSTFN0_INT_STATUS);
		bfa_regs->intr_mask   = (kva + HOSTFN0_INT_MSK);
	} else {
		bfa_regs->intr_status = (kva + HOSTFN1_INT_STATUS);
		bfa_regs->intr_mask   = (kva + HOSTFN1_INT_MSK);
	}
}

void
bfa_hwct2_reginit(struct bfa_s *bfa)
{
	struct bfa_iocfc_regs_s *bfa_regs = &bfa->iocfc.bfa_regs;
	void __iomem	*kva = bfa_ioc_bar0(&bfa->ioc);

	bfa_regs->intr_status = (kva + CT2_HOSTFN_INT_STATUS);
	bfa_regs->intr_mask   = (kva + CT2_HOSTFN_INTR_MASK);
}

void
bfa_hwct_reqq_ack(struct bfa_s *bfa, int reqq)
{
	u32	r32;

	r32 = readl(bfa->iocfc.bfa_regs.cpe_q_ctrl[reqq]);
	writel(r32, bfa->iocfc.bfa_regs.cpe_q_ctrl[reqq]);
}

/*
 * Actions to respond RME Interrupt for Catapult ASIC:
 * - Write 1 to Interrupt Status register (INTx only - done in bfa_intx())
 * - Acknowledge by writing to RME Queue Control register
 * - Update CI
 */
void
bfa_hwct_rspq_ack(struct bfa_s *bfa, int rspq, u32 ci)
{
	u32	r32;

	r32 = readl(bfa->iocfc.bfa_regs.rme_q_ctrl[rspq]);
	writel(r32, bfa->iocfc.bfa_regs.rme_q_ctrl[rspq]);

	bfa_rspq_ci(bfa, rspq) = ci;
	writel(ci, bfa->iocfc.bfa_regs.rme_q_ci[rspq]);
}

/*
 * Actions to respond RME Interrupt for Catapult2 ASIC:
 * - Write 1 to Interrupt Status register (INTx only - done in bfa_intx())
 * - Update CI
 */
void
bfa_hwct2_rspq_ack(struct bfa_s *bfa, int rspq, u32 ci)
{
	bfa_rspq_ci(bfa, rspq) = ci;
	writel(ci, bfa->iocfc.bfa_regs.rme_q_ci[rspq]);
}

void

Annotation

Implementation Notes