drivers/scsi/bfa/bfa_hw_cb.c
Source file repositories/reference/linux-study-clean/drivers/scsi/bfa/bfa_hw_cb.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/scsi/bfa/bfa_hw_cb.c- Extension
.c- Size
- 4374 bytes
- Lines
- 183
- 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.
- 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.
- Touches IRQ or DMA behavior; this matters for the representative real-device path.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
bfad_drv.hbfa_modules.hbfi_reg.h
Detected Declarations
function Copyrightfunction bfa_hwcb_reqq_ack_msixfunction bfa_hwcb_rspq_ack_msixfunction bfa_hwcb_rspq_ackfunction bfa_hwcb_msix_getvecsfunction bfa_hwcb_msix_dummyfunction bfa_hwcb_msix_ctrl_installfunction bfa_hwcb_msix_queue_installfunction bfa_hwcb_msix_uninstallfunction bfa_hwcb_isr_mode_setfunction bfa_hwcb_msix_get_rme_range
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"
void
bfa_hwcb_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);
}
}
static void
bfa_hwcb_reqq_ack_msix(struct bfa_s *bfa, int reqq)
{
writel(__HFN_INT_CPE_Q0 << CPE_Q_NUM(bfa_ioc_pcifn(&bfa->ioc), reqq),
bfa->iocfc.bfa_regs.intr_status);
}
/*
* Actions to respond RME Interrupt for Crossbow ASIC:
* - Write 1 to Interrupt Status register
* INTX - done in bfa_intx()
* MSIX - done in bfa_hwcb_rspq_ack_msix()
* - Update CI (only if new CI)
*/
static void
bfa_hwcb_rspq_ack_msix(struct bfa_s *bfa, int rspq, u32 ci)
{
writel(__HFN_INT_RME_Q0 << RME_Q_NUM(bfa_ioc_pcifn(&bfa->ioc), rspq),
bfa->iocfc.bfa_regs.intr_status);
if (bfa_rspq_ci(bfa, rspq) == ci)
return;
bfa_rspq_ci(bfa, rspq) = ci;
writel(ci, bfa->iocfc.bfa_regs.rme_q_ci[rspq]);
}
void
bfa_hwcb_rspq_ack(struct bfa_s *bfa, int rspq, u32 ci)
{
if (bfa_rspq_ci(bfa, rspq) == ci)
return;
bfa_rspq_ci(bfa, rspq) = ci;
writel(ci, bfa->iocfc.bfa_regs.rme_q_ci[rspq]);
}
void
bfa_hwcb_msix_getvecs(struct bfa_s *bfa, u32 *msix_vecs_bmap,
u32 *num_vecs, u32 *max_vec_bit)
{
#define __HFN_NUMINTS 13
if (bfa_ioc_pcifn(&bfa->ioc) == 0) {
*msix_vecs_bmap = (__HFN_INT_CPE_Q0 | __HFN_INT_CPE_Q1 |
__HFN_INT_CPE_Q2 | __HFN_INT_CPE_Q3 |
__HFN_INT_RME_Q0 | __HFN_INT_RME_Q1 |
__HFN_INT_RME_Q2 | __HFN_INT_RME_Q3 |
__HFN_INT_MBOX_LPU0);
*max_vec_bit = __HFN_INT_MBOX_LPU0;
} else {
*msix_vecs_bmap = (__HFN_INT_CPE_Q4 | __HFN_INT_CPE_Q5 |
__HFN_INT_CPE_Q6 | __HFN_INT_CPE_Q7 |
__HFN_INT_RME_Q4 | __HFN_INT_RME_Q5 |
__HFN_INT_RME_Q6 | __HFN_INT_RME_Q7 |
__HFN_INT_MBOX_LPU1);
*max_vec_bit = __HFN_INT_MBOX_LPU1;
}
*msix_vecs_bmap |= (__HFN_INT_ERR_EMC | __HFN_INT_ERR_LPU0 |
__HFN_INT_ERR_LPU1 | __HFN_INT_ERR_PSS);
Annotation
- Immediate include surface: `bfad_drv.h`, `bfa_modules.h`, `bfi_reg.h`.
- Detected declarations: `function Copyright`, `function bfa_hwcb_reqq_ack_msix`, `function bfa_hwcb_rspq_ack_msix`, `function bfa_hwcb_rspq_ack`, `function bfa_hwcb_msix_getvecs`, `function bfa_hwcb_msix_dummy`, `function bfa_hwcb_msix_ctrl_install`, `function bfa_hwcb_msix_queue_install`, `function bfa_hwcb_msix_uninstall`, `function bfa_hwcb_isr_mode_set`.
- Atlas domain: Driver Families / drivers/scsi.
- Implementation status: source implementation candidate.
- IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.