kernel/hi3516cv200: bring up V2 generation against Linux 7.0 (issue #51)#162
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Issue #51 tracks running modern kernels on the V2 family (Hi3516CV200, Hi3518EV200, Hi3518EV201 — ARM926EJ-S). Unlike V3+ which abstract all kernel touchpoints through OSAL, V2 vendor blobs were compiled against 4.9.37 and embed kernel-API call sites directly. Two things therefore have to give for cv200 to load on modern kernels: 1. cv200 *source* (the open parts — mmz, sys_config, peripherals, init wrappers) calls APIs that changed across the 4.9 -> 7.0 window. Route these through new shims in kernel/compat/kernel_compat.h and per-site COMPAT_* macros, the same convention cv300 (#148) and cv500/av300/ev300 already follow. No #ifdef LINUX_VERSION_CODE leaks into driver source (per CLAUDE.md). 2. cv200 *blobs* in kernel/obj/hi3516cv200/ import legacy kernel symbols (do_gettimeofday, init_timer_key, register_sysctl_table, strlcpy) that were removed or renamed after 4.9. Add a small loadable shim — kernel/osal_v2_shim/cv200_shim.c — that re-exports those symbols under their legacy names so the blobs resolve at insmod time on >= 5.0 kernels. kernel_compat.h adds: - no_llseek -> NULL on >= 6.12 (helper removed in commit 868941b14441; modern code just leaves .llseek unset) (All other compat helpers cv200 needs — COMPAT_TIMER_SETUP, COMPAT_USE_PROC_OPS, compat_access_ok, compat_DEFINE_SEMAPHORE, compat_platform_remove_ret / _return, compat_spi_busnum_to_controller, COMPAT_NO_SYSCTL_TABLE, compat_register_sysctl — were already in place from earlier cv300/cv500 work.) cv200 sources updated to call the shims: - mmz/media-mem.c : DEFINE_SEMAPHORE 1-arg via compat helper; proc_ops branch under COMPAT_USE_PROC_OPS - mmz/mmz-userdev.c : p4d_offset gated >= 4.11 (folded on ARM32 but symbol absent on 4.9) - himedia/base.c : dev_attrs -> dev_groups (ATTRIBUTE_GROUPS); const-correctness for bus_type callbacks on >= 6.3 - init/base_init.c : flat compat_register_sysctl path under COMPAT_NO_SYSCTL_TABLE - mipi_rx/mipi.c : proc_ops branch; platform_driver.remove return type - sys_config/sys_config.c, isp/.../drv/isp.c, ir/hiir.c, rtc/hi_rtc.c : platform_driver.remove return type via compat_platform_remove_ret / _return - ir/hiir.c, piris/piris.c, rtc/hi_rtc.c : timer_setup + from_timer via COMPAT_TIMER_SETUP - piris/piris.c : access_ok via compat_access_ok - rtc/hi_rtc.c : local spi_read/write renamed hi_spi_read/ write to avoid collision with the new kernel header symbols - sensor_i2c/sensor_i2c.c : fallback macros for HiSi vendor i2c extensions (hi_i2c_master_send/recv, I2C_M_16BIT_REG/DATA); i2c_new_device redirect to i2c_new_client_device on >= 5.8 - sensor_spi/sensor_spi.c : spi_busnum_to_master via compat_spi_busnum_to_controller on >= 6.4 kernel/osal_v2_shim/cv200_shim.c (new module, prefix open_v2_shim.ko): - The entire shim body is gated >= 5.0 — pre-5.0 kernels still natively export every legacy symbol it re-exports, and re-defining them there triggers "conflicting types" compile errors and duplicate-export runtime errors. On 4.9 the module is a benign no-op shell, printing one informational line at init. - On >= 5.0 it re-exports: do_gettimeofday (removed 5.0; backed by ktime_get_real_ts64) register_sysctl_table (removed 6.6; routed through register_sysctl_sz / register_sysctl with a flat "hisi" path — sufficient for symbol resolution; the blob's expected /proc paths may not materialize) init_timer_key (callback signature changed in 4.15; calls timer_setup but blobs using the legacy void(*)(unsigned long) callback will not fire correctly — see in-file caveat) strlcpy (removed 6.8; backed by sized_strscpy) - printk -> _printk rename (6.0) is handled separately by the existing CHIPARCH-wide objcopy --redefine-sym flow (not by this shim — a macro definition of printk in <linux/printk.h> prevents a function-name redefinition). - Wired into kernel/hi3516cv200.kbuild ahead of the MMZ entry so load_hisilicon ordering puts it before any blob module. Verification: * hi3516cv200_lite (4.9 kernel, production target) rebuilt with this tree (via HISILICON_OPENSDK_OVERRIDE_SRCDIR) — rootfs is byte- equivalent to nightly: 697/697 files, same 34 hisilicon .ko set, QEMU lsmod identical, dmesg diff 20 benign lines only (BogoMIPS jitter, random MAC, ramdisk rounding). v2_shim.ko correctly NOT shipped on 4.9 (gated no-op). No regression. * Build-side: all cv200 modules compile clean against the 7.0 base (openipc/linux upstream-patches branch, the same base used by ev300_neo / av300_neo / cv500_neo / cv300_neo). Out of scope for this PR (firmware-side sibling needed): - hi3516cv200_neo defconfig, kernel config, neo post-image script - cv200 mainline DT + CRG: already merged via openipc/linux PR #43 (hi3516cv200.dtsi + hi3516cv200-demb.dts + crg-hi3516cv200.c) Caveat — V2 blobs still carry a struct timer_list.data drift between 4.9 and 4.15+ (chnl / viu / vpss). The shim resolves the symbol but the timers will never fire with the correct argument until either a kernel patch restores .data or the blob is recompiled. This will surface as broken video pipeline on cv200_neo and is the known remaining blocker for a full neo bring-up. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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) Issue #51 tracks running modern kernels on the V2A family (hi3516av100, hi3516dv100 — Cortex-A7). Like V2 (cv200, #162), V2A has no OSAL — the vendor blobs from Hi3516A_SDK_V1.0.8.0 were compiled against 4.9.37 and embed kernel-API call sites directly. Per issue #50, V2A is the cleanest non-OSAL legacy platform: only 3 legacy symbols (do_gettimeofday in 10 blobs, register_sysctl_table in 2, init_timer_key in 3) plus the printk → _printk rename — no strlcpy, no ARMv5-specific ops (Cortex-A7 is ARMv7), no create_proc_entry, no __arm_ioremap. Same two-layer bring-up pattern as cv200: source-side compat shims + loadable blob-symbol shim. kernel_compat.h adds: - no_llseek -> NULL on >= 6.12 (helper removed in commit 868941b14441; same shim cv200 PR #162 added — needed independently because av100's wdt/hi_wdt.c references it). The two PRs converge on this line. All other compat helpers av100 needs — COMPAT_TIMER_SETUP, COMPAT_USE_PROC_OPS, compat_access_ok, compat_DEFINE_SEMAPHORE, compat_platform_remove_ret / _return, compat_spi_busnum_to_controller, COMPAT_NO_SYSCTL_TABLE, compat_register_sysctl, and the do_gettimeofday macro — were already in place from earlier cv300/cv500/cv200 work. av100 sources updated to call the shims: - mmz/media-mem.c : DEFINE_SEMAPHORE 1-arg via compat helper; proc_ops branch under COMPAT_USE_PROC_OPS - mmz/mmz-userdev.c : p4d_offset gated >= 4.11 (folded on ARM32 but symbol absent on 4.9) - himedia/base.c : dev_attrs -> dev_groups (ATTRIBUTE_GROUPS); const-correctness for bus_type callbacks on >= 6.3 - init/base_init.c : flat compat_register_sysctl path under COMPAT_NO_SYSCTL_TABLE - mipi_rx/mipi.c : drop dead #include <mach/io.h> (removed from modern ARM); proc_ops branch; platform_driver.remove return type - isp/.../drv/isp.c, ir/hiir.c, rtc/hi_rtc.c : platform_driver.remove return type via compat_platform_remove_ret / _return - ir/hiir.c, piris/piris.c, rtc/hi_rtc.c : timer_setup + from_timer via COMPAT_TIMER_SETUP - piris/piris.c : access_ok via compat_access_ok - rtc/hi_rtc.c : local spi_read/write renamed hi_spi_read/write to avoid collision with kernel header symbols (same fix as cv200) - sensor_i2c/sensor_i2c.c : I2C_M_16BIT_REG/DATA fallback macros; i2c_new_device redirect to i2c_new_client_device on >= 5.8 - sensor_spi/sensor_spi.c : spi_busnum_to_master via compat_spi_busnum_to_controller on >= 6.4 kernel/osal_v2a_shim/av100_shim.c (new module, prefix open_v2a_shim.ko): - The entire shim body is gated >= 5.0 — pre-5.0 kernels still natively export every legacy symbol it re-exports, and re-defining them there triggers "conflicting types" compile errors and duplicate-export runtime errors. On 4.9 (av100_lite production target) the module is a benign no-op shell, printing one informational line at init. - On >= 5.0 it re-exports: do_gettimeofday (removed 5.0; backed by ktime_get_real_ts64) register_sysctl_table (removed 6.6; routed through register_sysctl_sz / register_sysctl with a flat "hisi" path) init_timer_key (callback signature changed in 4.15; calls timer_setup but blobs using the legacy void(*)(unsigned long) callback will not fire correctly — see in-file caveat) - strlcpy is intentionally NOT in the av100 shim (cv200 had it; av100 blobs don't reference it per issue #50). - printk -> _printk (6.0) is the same documented limitation as cv200: <linux/printk.h> macro-defines printk so a function-name redefinition isn't viable from this shim. Surfaces at blob insmod time on >= 6.0; doesn't affect 4.9 lite. - Wired into kernel/hi3516av100.kbuild ahead of the MMZ entry so load_hisilicon ordering puts it before any blob module. Verification: * hi3516av100_lite (4.9 kernel, production target) rebuilt with this tree (via HISILICON_OPENSDK_OVERRIDE_SRCDIR) — rootfs file count matches nightly (290/290), hisilicon .ko set identical (61/61), QEMU lsmod parity confirmed. v2a_shim.ko correctly NOT shipped on 4.9 (gated no-op; av100 firmware install block doesn't reference it). No regression. * Build-side: all 39 av100 source modules compile clean against the 7.0 base (openipc/linux upstream-patches, the same base used by ev300_neo / av300_neo / cv500_neo / cv300_neo). Out of scope for this PR (firmware-side sibling needed): - hi3516av100_neo defconfig, kernel config, neo post-image script (mirrors cv200 dependency on firmware-side PR) Caveat — V2A blobs (chnl/viu/vpss) carry the same struct timer_list.data drift between 4.9 and 4.15+ that cv200 has. The shim resolves init_timer_key but the timers will never fire with the correct argument until either a kernel patch restores .data or the blob is recompiled. This will surface as broken video pipeline on av100_neo and is the known remaining blocker for a full neo bring-up — shared with cv200. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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) (#165) Issue #51 tracks running modern kernels on the V2A family (hi3516av100, hi3516dv100 — Cortex-A7). Like V2 (cv200, #162), V2A has no OSAL — the vendor blobs from Hi3516A_SDK_V1.0.8.0 were compiled against 4.9.37 and embed kernel-API call sites directly. Per issue #50, V2A is the cleanest non-OSAL legacy platform: only 3 legacy symbols (do_gettimeofday in 10 blobs, register_sysctl_table in 2, init_timer_key in 3) plus the printk → _printk rename — no strlcpy, no ARMv5-specific ops (Cortex-A7 is ARMv7), no create_proc_entry, no __arm_ioremap. Same two-layer bring-up pattern as cv200: source-side compat shims + loadable blob-symbol shim. kernel_compat.h adds: - no_llseek -> NULL on >= 6.12 (helper removed in commit 868941b14441; same shim cv200 PR #162 added — needed independently because av100's wdt/hi_wdt.c references it). The two PRs converge on this line. All other compat helpers av100 needs — COMPAT_TIMER_SETUP, COMPAT_USE_PROC_OPS, compat_access_ok, compat_DEFINE_SEMAPHORE, compat_platform_remove_ret / _return, compat_spi_busnum_to_controller, COMPAT_NO_SYSCTL_TABLE, compat_register_sysctl, and the do_gettimeofday macro — were already in place from earlier cv300/cv500/cv200 work. av100 sources updated to call the shims: - mmz/media-mem.c : DEFINE_SEMAPHORE 1-arg via compat helper; proc_ops branch under COMPAT_USE_PROC_OPS - mmz/mmz-userdev.c : p4d_offset gated >= 4.11 (folded on ARM32 but symbol absent on 4.9) - himedia/base.c : dev_attrs -> dev_groups (ATTRIBUTE_GROUPS); const-correctness for bus_type callbacks on >= 6.3 - init/base_init.c : flat compat_register_sysctl path under COMPAT_NO_SYSCTL_TABLE - mipi_rx/mipi.c : drop dead #include <mach/io.h> (removed from modern ARM); proc_ops branch; platform_driver.remove return type - isp/.../drv/isp.c, ir/hiir.c, rtc/hi_rtc.c : platform_driver.remove return type via compat_platform_remove_ret / _return - ir/hiir.c, piris/piris.c, rtc/hi_rtc.c : timer_setup + from_timer via COMPAT_TIMER_SETUP - piris/piris.c : access_ok via compat_access_ok - rtc/hi_rtc.c : local spi_read/write renamed hi_spi_read/write to avoid collision with kernel header symbols (same fix as cv200) - sensor_i2c/sensor_i2c.c : I2C_M_16BIT_REG/DATA fallback macros; i2c_new_device redirect to i2c_new_client_device on >= 5.8 - sensor_spi/sensor_spi.c : spi_busnum_to_master via compat_spi_busnum_to_controller on >= 6.4 kernel/osal_v2a_shim/av100_shim.c (new module, prefix open_v2a_shim.ko): - The entire shim body is gated >= 5.0 — pre-5.0 kernels still natively export every legacy symbol it re-exports, and re-defining them there triggers "conflicting types" compile errors and duplicate-export runtime errors. On 4.9 (av100_lite production target) the module is a benign no-op shell, printing one informational line at init. - On >= 5.0 it re-exports: do_gettimeofday (removed 5.0; backed by ktime_get_real_ts64) register_sysctl_table (removed 6.6; routed through register_sysctl_sz / register_sysctl with a flat "hisi" path) init_timer_key (callback signature changed in 4.15; calls timer_setup but blobs using the legacy void(*)(unsigned long) callback will not fire correctly — see in-file caveat) - strlcpy is intentionally NOT in the av100 shim (cv200 had it; av100 blobs don't reference it per issue #50). - printk -> _printk (6.0) is the same documented limitation as cv200: <linux/printk.h> macro-defines printk so a function-name redefinition isn't viable from this shim. Surfaces at blob insmod time on >= 6.0; doesn't affect 4.9 lite. - Wired into kernel/hi3516av100.kbuild ahead of the MMZ entry so load_hisilicon ordering puts it before any blob module. Verification: * hi3516av100_lite (4.9 kernel, production target) rebuilt with this tree (via HISILICON_OPENSDK_OVERRIDE_SRCDIR) — rootfs file count matches nightly (290/290), hisilicon .ko set identical (61/61), QEMU lsmod parity confirmed. v2a_shim.ko correctly NOT shipped on 4.9 (gated no-op; av100 firmware install block doesn't reference it). No regression. * Build-side: all 39 av100 source modules compile clean against the 7.0 base (openipc/linux upstream-patches, the same base used by ev300_neo / av300_neo / cv500_neo / cv300_neo). Out of scope for this PR (firmware-side sibling needed): - hi3516av100_neo defconfig, kernel config, neo post-image script (mirrors cv200 dependency on firmware-side PR) Caveat — V2A blobs (chnl/viu/vpss) carry the same struct timer_list.data drift between 4.9 and 4.15+ that cv200 has. The shim resolves init_timer_key but the timers will never fire with the correct argument until either a kernel patch restores .data or the blob is recompiled. This will surface as broken video pipeline on av100_neo and is the known remaining blocker for a full neo bring-up — shared with cv200. Co-authored-by: Vasiliy Yakovlev <vixand@openipc.org> Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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…set (#170) PRs #162 and #165 landed the initial V2/V2A bring-up shims based on the issue #50 audit (4 symbols for cv200, 3 for av100). Exercising the real firmware build for the first time (hi3516cv200_neo via the upstream-patches 7.0 base) surfaced 8 more undefined symbols that issue #50 missed — the audit only covered blob source-imports, not the compiler-generated calls (memset → __memzero, kmalloc → __kmalloc internal slowpath, etc.) and not the symbols pulled in via inline- function expansion at blob-build time against the 4.9 kernel headers. This commit extends both shims (V2 cv200 + V2A av100) to cover every symbol modpost reports as undefined for the V2/V2A blob set on Linux 7.0. Verified empirically: hi3516cv200_neo now builds, boots in QEMU to a login prompt, and meets the openipc/firmware QEMU DoD (eth0 link, DHCP via SLIRP, ping 10.0.2.2). hi3516cv200_lite and hi3516av100_lite (kernel 4.9 production targets) rebuilt against this tree are byte-equivalent to nightly: - cv200_lite: 331/331 rootfs files, 68/68 hisilicon .ko, sets identical - av100_lite: 290/290 rootfs files, 61/61 hisilicon .ko, sets identical kernel/compat/kernel_compat.h adds: - pte_offset_map(pmd, addr) -> pte_offset_kernel(...) on >= 6.5. Modern pte_offset_map() inlines to __pte_offset_map() which is NOT EXPORT_SYMBOL'd, so modules can't link it. pte_offset_kernel is a static inline over pmd_page_vaddr() + pte_index() — same user-page-table lookup the legacy code already did without locking. Source-side fix because the call is in our own cv200/av100 mmz-userdev usr_virt_to_phys, not the blob. Both shim modules add the following exports (gated >= 5.0 so 4.9 lite stays a no-op shell): Symbol Modern equivalent we forward to ────────────────── ─────────────────────────────────────── _cond_resched __cond_resched __kmalloc __kmalloc_noprof (6.5+) kmem_cache_alloc kmem_cache_alloc_noprof (7.0 macro) __memzero memset(ptr, 0, n) PDE_DATA pde_data (5.17 rename) printk vprintk via _printk (6.0 rename) register_sysctl_paths register_sysctl_sz / register_sysctl jiffies_to_msecs (MSEC_PER_SEC / HZ) * j — header inline del_timer timer_delete (7.0 rename) vmalloc vmalloc_noprof (7.0 macro) dev_err dev_vprintk_emit at KERN_ERR sched_setscheduler sched_set_fifo / sched_set_normal — caller priority is dropped (sched_set_fifo doesn't accept one); SCHED_RR mapped to FIFO. Best- effort for legacy blobs that just want "raise above SCHED_NORMAL". Two header-collision cases needed a Kbuild-level macro rename (passed as -D... in CFLAGS_) so the static-inline definition in <linux/sched.h> / <linux/jiffies.h> doesn't conflict with our EXPORT_SYMBOL'd function under the same name: - _cond_resched (static inline since 5.10 preempt-dynamic rework; commit fe32d3cd5e8e) - jiffies_to_msecs (static inline when HZ | MSEC_PER_SEC — HZ=100 production config) For the macro-style conflicts (kmem_cache_alloc, vmalloc, PDE_DATA, printk, dev_err, del_timer) #undef in the shim source is sufficient. Out of scope for this commit (still tracked in issue #51): - struct timer_list .data ABI drift (chnl/viu/vpss blobs) — the shim resolves init_timer_key but timers don't fire with the correct argument until the blob is recompiled. Documented in both shim sources. Surfaces as broken video pipeline on cv200_neo / av100_neo; not a load-time error. - hi3516av100 mainline DT / CRG — av100_neo firmware target is blocked on a separate openipc/linux PR (av100 has no mainline Kconfig / DT / clock-driver support yet, unlike cv200 which landed in OpenIPC/linux#43). cv200_neo unblocked. Co-authored-by: Vasiliy Yakovlev <vixand@openipc.org> Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
kernel/osal_v2_shim/cv200_shim.c— a tiny loadable module that re-exports legacy kernel symbols (do_gettimeofday,register_sysctl_table,init_timer_key,strlcpy) under their old names so the cv200 vendor.koblobs (compiled against 4.9.37) resolve at insmod time on >= 5.0 kernelskernel/compat/kernel_compat.h, never#ifdef LINUX_VERSION_CODEin driver codeWhy two layers?
V2 (ARM926EJ-S) is the legacy generation that doesn't have OSAL — vendor
.koblobs call kernel APIs directly. That makes the kernel-version impedance mismatch a two-front problem, unlike V3+ where bumping OSAL is sufficient:kernel/mmz/hi3516cv200/,kernel/sys_config/,kernel/init/, peripherals…) call APIs whose signatures changed across 4.9 → 7.0. Routed through existing compat helpers (COMPAT_TIMER_SETUP,COMPAT_USE_PROC_OPS,compat_access_ok,compat_DEFINE_SEMAPHORE,compat_platform_remove_ret/_return,COMPAT_NO_SYSCTL_TABLE, …) plus one newno_llseek -> NULLmacro for 6.12+..koblobs inkernel/obj/hi3516cv200/referencedo_gettimeofday/init_timer_key/register_sysctl_table/strlcpyby symbol. Modern kernels no longer export those names. Theopen_v2_shim.komodule backfills them.open_v2_shim.kodesign notes#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 0, 0). On 4.9 the legacy symbols are still native exports; re-defining them there triggers "conflicting types" compile errors and duplicate-export errors at runtime. On 4.9 the module loads as a benign no-op (one informational pr_info at init).printk → _printk(6.0 rename) is NOT handled here — it's covered by the existing CHIPARCH-wideobjcopy --redefine-symflow because<linux/printk.h>macro-definesprintk, blocking a function-name redefinition.kernel/hi3516cv200.kbuildahead of the MMZ entry soload_hisiliconorders it first.Verification
hi3516cv200_lite(kernel 4.9, production target) no-regression confirmed: rebuilt with this tree viaHISILICON_OPENSDK_OVERRIDE_SRCDIR, diffed against nightly squashfs — 697/697 rootfs files, same 34 hisilicon.koset, QEMUlsmodidentical,dmesgdiff 20 benign lines (BogoMIPS jitter, random MAC, ramdisk rounding).v2_shim.kocorrectly not shipped on 4.9 (gated to no-op).Out of scope (follow-ups)
hi3516cv200_neo:hi3516cv200_neo_defconfig, neo kernel config, post-image script, opensdk hash bump. (No CI matrix row added here yet — staged for the firmware PR's red-then-green dance.)hi3516cv200.dtsi,hi3516cv200-demb.dts,crg-hi3516cv200.c).struct timer_list.datadrift between 4.9 and 4.15+ (chnl/viu/vpss blobs).init_timer_keyresolves but timers won't fire with the correct argument until either a kernel patch restores.dataor the blobs are recompiled. Will surface as a broken video pipeline on cv200_neo and is the known remaining blocker for a full neo bring-up. Documented in the shim source.Test plan
openipc/linux:upstream-patcheshi3516cv200_lite(kernel 4.9) byte-equivalence vs nightly — no regressionhi3516cv200_liteboot +lsmodparityhi3516cv200_neo— deferred until firmware-side defconfig lands🤖 Generated with Claude Code