drivers/net/ethernet/altera/altera_utils.c
Source file repositories/reference/linux-study-clean/drivers/net/ethernet/altera/altera_utils.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/net/ethernet/altera/altera_utils.c- Extension
.c- Size
- 813 bytes
- Lines
- 34
- Domain
- Driver Families
- Bucket
- drivers/net
- 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.
Dependency Surface
altera_tse.haltera_utils.h
Detected Declarations
function Copyrightfunction tse_clear_bitfunction tse_bit_is_setfunction tse_bit_is_clear
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0-only
/* Altera TSE SGDMA and MSGDMA Linux driver
* Copyright (C) 2014 Altera Corporation. All rights reserved
*/
#include "altera_tse.h"
#include "altera_utils.h"
void tse_set_bit(void __iomem *ioaddr, size_t offs, u32 bit_mask)
{
u32 value = csrrd32(ioaddr, offs);
value |= bit_mask;
csrwr32(value, ioaddr, offs);
}
void tse_clear_bit(void __iomem *ioaddr, size_t offs, u32 bit_mask)
{
u32 value = csrrd32(ioaddr, offs);
value &= ~bit_mask;
csrwr32(value, ioaddr, offs);
}
int tse_bit_is_set(void __iomem *ioaddr, size_t offs, u32 bit_mask)
{
u32 value = csrrd32(ioaddr, offs);
return (value & bit_mask) ? 1 : 0;
}
int tse_bit_is_clear(void __iomem *ioaddr, size_t offs, u32 bit_mask)
{
u32 value = csrrd32(ioaddr, offs);
return (value & bit_mask) ? 0 : 1;
}
Annotation
- Immediate include surface: `altera_tse.h`, `altera_utils.h`.
- Detected declarations: `function Copyright`, `function tse_clear_bit`, `function tse_bit_is_set`, `function tse_bit_is_clear`.
- Atlas domain: Driver Families / drivers/net.
- Implementation status: source implementation candidate.
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.