kernel/git/next/linux-next.git/drivers/accel/habanalabs/common, branch master

Convert remaining multi-line kmalloc_obj/flex GFP_KERNEL uses

2026-02-22T16:26:33+00:00

Conversion performed via this Coccinelle script: // SPDX-License-Identifier: GPL-2.0-only // Options: --include-headers-for-types --all-includes --include-headers --keep-comments virtual patch @gfp depends on patch && !(file in "tools") && !(file in "samples")@ identifier ALLOC = {kmalloc_obj,kmalloc_objs,kmalloc_flex, kzalloc_obj,kzalloc_objs,kzalloc_flex, kvmalloc_obj,kvmalloc_objs,kvmalloc_flex, kvzalloc_obj,kvzalloc_objs,kvzalloc_flex}; @@ ALLOC(... - , GFP_KERNEL ) $ make coccicheck MODE=patch COCCI=gfp.cocci Build and boot tested x86_64 with Fedora 42's GCC and Clang: Linux version 6.19.0+ (user@host) (gcc (GCC) 15.2.1 20260123 (Red Hat 15.2.1-7), GNU ld version 2.44-12.fc42) #1 SMP PREEMPT_DYNAMIC 1970-01-01 Linux version 6.19.0+ (user@host) (clang version 20.1.8 (Fedora 20.1.8-4.fc42), LLD 20.1.8) #1 SMP PREEMPT_DYNAMIC 1970-01-01 Signed-off-by: Kees Cook Signed-off-by: Linus Torvalds

Convert more 'alloc_obj' cases to default GFP_KERNEL arguments

2026-02-22T04:03:00+00:00

This converts some of the visually simpler cases that have been split over multiple lines. I only did the ones that are easy to verify the resulting diff by having just that final GFP_KERNEL argument on the next line. Somebody should probably do a proper coccinelle script for this, but for me the trivial script actually resulted in an assertion failure in the middle of the script. I probably had made it a bit _too_ trivial. So after fighting that far a while I decided to just do some of the syntactically simpler cases with variations of the previous 'sed' scripts. The more syntactically complex multi-line cases would mostly really want whitespace cleanup anyway. Signed-off-by: Linus Torvalds

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook

accel/habanalabs: add Infineon version check

2025-09-25T06:14:45+00:00

On HL338 ASICs, the Infineon first‑stage firmware is not present and the reported version is 0. In this case printing a version number is misleading, as it suggests valid firmware when it does not exist. Fix this by printing the first‑stage Infineon firmware version only if the reported value is non‑zero. This avoids confusing or incorrect log messages on devices where the first stage is not applicable. Signed-off-by: Pavan S Reviewed-by: Koby Elbaz Signed-off-by: Koby Elbaz

accel/habanalabs: add HL_GET_P_STATE passthrough type

2025-09-25T06:09:31+00:00

Add a new passthrough type HL_GET_P_STATE to the cpucp generic ioctl to allow userspace to read the device performance state via firmware. Signed-off-by: Ariel Aviad Reviewed-by: Koby Elbaz Signed-off-by: Koby Elbaz

accel/habanalabs: add debugfs interface for HLDIO testing

2025-09-25T06:09:31+00:00

Add debugfs files for NVMe Direct I/O (HLDIO) functionality. This interface allows userspace access to direct SSD ↔ device transfers through debugfs nodes. Four debugfs files are created under /sys/kernel/debug/habanalabs/hlN/: - dio_ssd2hl : trigger SSD-to-device transfers - dio_hl2ssd : trigger device-to-SSD transfers (placeholder, not yet implemented) - dio_stats : show transfer statistics - dio_reset : reset statistics counters Usage examples: # Perform SSD → device transfer echo "fd=3 va=0x10000 off=0 len=4096" > \ /sys/kernel/debug/habanalabs/hl0/dio_ssd2hl # View statistics cat /sys/kernel/debug/habanalabs/hl0/dio_stats # Reset counters echo 1 > /sys/kernel/debug/habanalabs/hl0/dio_reset This interface provides access to HLDIO functionality for validation and diagnostics. Signed-off-by: Konstantin Sinyuk Reviewed-by: Farah Kassabri Reviewed-by: Koby Elbaz Signed-off-by: Koby Elbaz

accel/habanalabs: add NVMe Direct I/O (HLDIO) infrastructure

2025-09-25T06:09:30+00:00

Introduce NVMe Direct I/O (HLDIO) infrastructure to support peer‑to‑peer DMA in the habanalabs driver. This adds internal helpers and data structures to enable direct transfers between NVMe storage and device memory. The feature is built only when CONFIG_HL_HLDIO is enabled. A debugfs interface is also provided for functional validation. Signed-off-by: Konstantin Sinyuk Reviewed-by: Farah Kassabri Reviewed-by: Koby Elbaz Signed-off-by: Koby Elbaz

accel/habanalabs: remove old interface variation of 'access_ok()'

2025-09-25T06:09:29+00:00

The access_ok() API no longer requires the VERIFY_WRITE argument, and the use of the old interface with VERIFY_WRITE is deprecated. Clean up the habanalabs memory manager to use the modern access_ok() interface consistently. This removes old #ifdef guards and aligns the driver with current upstream kernel APIs. Signed-off-by: Ilia Levi Reviewed-by: Koby Elbaz Signed-off-by: Koby Elbaz

accel/habanalabs/gaudi2: use the CPLD_SHUTDOWN event handler

2025-09-25T06:09:29+00:00

After CPLD shutdown event the device is not usable anymore. The common CPLD_SHUTDOWN event handler disables any subsequent device access. Signed-off-by: Konstantin Sinyuk Reviewed-by: Koby Elbaz Signed-off-by: Koby Elbaz