ARM: dts: Add support for Olimex AM3352-SOM #52

vinifr · 2015-12-06T18:08:52Z

Add a dts file for Olimex AM3352-SOM board. The board does not use the PMIC
tps65217 and does not have many peripherals present in beaglebone. Thus, a
specific dtsi file (am335x-som-common.dtsi) is needed.

Signed-off-by: Dimitar Gamishev hehopmajieh@debian.bg
Signed-off-by: Vinicius Maciel viniciusfre@gmail.com

Add a dts file for Olimex AM3352-SOM board. The board does not use the PMIC tps65217 and does not have many peripherals present in beaglebone. Thus, a specific dtsi file (am335x-som-common.dtsi) is needed. Signed-off-by: Dimitar Gamishev <hehopmajieh@debian.bg> Signed-off-by: Vinicius Maciel <viniciusfre@gmail.com>

RobertCNelson · 2015-12-06T20:39:01Z

Something wrong? I was going to gueue this up on Monday? Let me know..

vinifr · 2015-12-06T21:08:18Z

Something is wrong. The two Ethernet interfaces are not detected. Just working with https://github.com/OLIMEX/linux-3.12.10-ti2013.12.01-am3352_som/blob/master/drivers/net/ethernet/ti/cpsw.c

My change seems it's not ok to your cpsw.c:

&mac {
pinctrl-names = "default", "sleep";
pinctrl-0 = <&cpsw_default>;
pinctrl-1 = <&cpsw_sleep>;
slaves = <2>;
dual_emac = <1>;

cpsw_emac0 {
    dual_emac_res_vlan = <1>;
};

cpsw_emac1 {
    dual_emac_res_vlan = <2>;
};

};

&cpsw_emac0 {
phy_id = <&davinci_mdio>, <0>;
phy-mode = "mii";
};

&cpsw_emac1 {
phy_id = <&davinci_mdio>, <1>;
phy-mode = "mii";
};

RobertCNelson · 2015-12-06T21:15:07Z

I think your tripping on linux/commit/e6c31b3467ac383ba57ae41146d31f0ef29da3c3

Drop the am335-bone compat..

RobertCNelson · 2015-12-06T21:16:13Z

e6c31b3

vinifr · 2015-12-07T00:16:27Z

If I understood you correctly, removing "ti,am335x-bone" from am335x-olimex-som.dts still does not work. It's very strange, there is not even a mention to davinci_mdio.c functions or cpsw.c: http://pastebin.com/aDPBYXC7 ... I setup kernel log level to 7. Dimitar' kernel: http://pastebin.com/LdJvw7c3

vinifr · 2015-12-09T02:05:49Z

Hi RobertCNelson,
Finally the ethernet interfaces worked! A simple status = "okay" solved the problem.

davinci_mdio: dt: updated phy_id[0] from phy_mask[fffffffc]
davinci_mdio: dt: updated phy_id[1] from phy_mask[fffffffc]

RobertCNelson · 2015-12-09T02:13:06Z

That's great it worked, but i see the phy_mask bug so only one probally works, i'll edit out the "ti,am335x-bone" in the patch..

vinifr · 2015-12-09T02:22:28Z

OK. Anyway, I tested both interfaces and both pick up IP.

ifconfig
eth2 Link encap:Ethernet HWaddr 1c:ba:8c:9c:92:49
inet addr:192.168.25.173 Bcast:192.168.25.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:6953 errors:0 dropped:0 overruns:0 frame:0
TX packets:3953 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:9849789 (9.3 MiB) TX bytes:276379 (269.9 KiB)
Interrupt:171

eth3 Link encap:Ethernet HWaddr 1c:ba:8c:9c:92:4b
inet addr:192.168.25.172 Bcast:192.168.25.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:44 errors:0 dropped:0 overruns:0 frame:0
TX packets:21 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:8655 (8.4 KiB) TX bytes:3283 (3.2 KiB)

Kernel log: http://pastebin.com/LKnzXEDd

RobertCNelson · 2015-12-09T02:28:55Z

That's crazy!

With the patch we get the first phy_mask:

https://github.com/RobertCNelson/ti-linux-kernel-dev/blob/ti-linux-4.1.y/patches/beaglebone/phy/0001-cpsw-search-for-phy.patch#L45

and then we update the both ethernet slaves with the exact same phy_mask. ;)

I'm just really surprised you got two ip's, i was kinda expecting them to clone..

fixes: beagleboard/linux#53 fixes: beagleboard/linux#52 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

RobertCNelson · 2015-12-09T02:31:50Z

Okay, pushed to "4.1.x-ti" and "4.1.x-rt-ti" it'll be part of r36, pushed out on Thursday, noon central.

Thanks!!!

fixes: beagleboard/linux#53 fixes: beagleboard/linux#52 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

vinifr · 2015-12-09T08:53:20Z

Great! Thanks.

fixes: beagleboard/linux#53 fixes: beagleboard/linux#52 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

commit a7a7aee upstream. When interrupting an application which was allocating DMAable memory, it was possible, that the DMA memory was deallocated twice, leading to the error symptoms below. Thanks to Gerald, who analyzed the problem and provided this patch. I agree with his analysis of the problem: ddcb_cmd_fixups() -> genwqe_alloc_sync_sgl() (fails in f/lpage, but sgl->sgl != NULL and f/lpage maybe also != NULL) -> ddcb_cmd_cleanup() -> genwqe_free_sync_sgl() (double free, because sgl->sgl != NULL and f/lpage maybe also != NULL) In this scenario we would have exactly the kind of double free that would explain the WARNING / Bad page state, and as expected it is caused by broken error handling (cleanup). Using the Ubuntu git source, tag Ubuntu-4.4.0-33.52, he was able to reproduce the "Bad page state" issue, and with the patch on top he could not reproduce it any more. ------------[ cut here ]------------ WARNING: at /build/linux-o03cxz/linux-4.4.0/arch/s390/include/asm/pci_dma.h:141 Modules linked in: qeth_l2 ghash_s390 prng aes_s390 des_s390 des_generic sha512_s390 sha256_s390 sha1_s390 sha_common genwqe_card qeth crc_itu_t qdio ccwgroup vmur dm_multipath dasd_eckd_mod dasd_mod CPU: 2 PID: 3293 Comm: genwqe_gunzip Not tainted 4.4.0-33-generic #52-Ubuntu task: 0000000032c7e270 ti: 00000000324e4000 task.ti: 00000000324e4000 Krnl PSW : 0404c00180000000 0000000000156346 (dma_update_cpu_trans+0x9e/0xa8) R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 EA:3 Krnl GPRS: 00000000324e7bcd 0000000000c3c34a 0000000027628298 000000003215b400 0000000000000400 0000000000001fff 0000000000000400 0000000116853000 07000000324e7b1e 0000000000000001 0000000000000001 0000000000000001 0000000000001000 0000000116854000 0000000000156402 00000000324e7a38 Krnl Code: 000000000015633a: 95001000 cli 0(%r1),0 000000000015633e: a774ffc3 brc 7,1562c4 #0000000000156342: a7f40001 brc 15,156344 >0000000000156346: 92011000 mvi 0(%r1),1 000000000015634a: a7f4ffbd brc 15,1562c4 000000000015634e: 0707 bcr 0,%r7 0000000000156350: c00400000000 brcl 0,156350 0000000000156356: eb7ff0500024 stmg %r7,%r15,80(%r15) Call Trace: ([<00000000001563e0>] dma_update_trans+0x90/0x228) [<00000000001565dc>] s390_dma_unmap_pages+0x64/0x160 [<00000000001567c2>] s390_dma_free+0x62/0x98 [<000003ff801310ce>] __genwqe_free_consistent+0x56/0x70 [genwqe_card] [<000003ff801316d0>] genwqe_free_sync_sgl+0xf8/0x160 [genwqe_card] [<000003ff8012bd6e>] ddcb_cmd_cleanup+0x86/0xa8 [genwqe_card] [<000003ff8012c1c0>] do_execute_ddcb+0x110/0x348 [genwqe_card] [<000003ff8012c914>] genwqe_ioctl+0x51c/0xc20 [genwqe_card] [<000000000032513a>] do_vfs_ioctl+0x3b2/0x518 [<0000000000325344>] SyS_ioctl+0xa4/0xb8 [<00000000007b86c6>] system_call+0xd6/0x264 [<000003ff9e8e520a>] 0x3ff9e8e520a Last Breaking-Event-Address: [<0000000000156342>] dma_update_cpu_trans+0x9a/0xa8 ---[ end trace 35996336235145c8 ]--- BUG: Bad page state in process jbd2/dasdb1-8 pfn:3215b page:000003d100c856c0 count:-1 mapcount:0 mapping: (null) index:0x0 flags: 0x3fffc0000000000() page dumped because: nonzero _count Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Frank Haverkamp <haver@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

[ Upstream commit 031af50 ] The inline assembly for arm64's cmpxchg_double*() implementations use a +Q constraint to hazard against other accesses to the memory location being exchanged. However, the pointer passed to the constraint is a pointer to unsigned long, and thus the hazard only applies to the first 8 bytes of the location. GCC can take advantage of this, assuming that other portions of the location are unchanged, leading to a number of potential problems. This is similar to what we fixed back in commit: fee960b ("arm64: xchg: hazard against entire exchange variable") ... but we forgot to adjust cmpxchg_double*() similarly at the same time. The same problem applies, as demonstrated with the following test: | struct big { | u64 lo, hi; | } __aligned(128); | | unsigned long foo(struct big *b) | { | u64 hi_old, hi_new; | | hi_old = b->hi; | cmpxchg_double_local(&b->lo, &b->hi, 0x12, 0x34, 0x56, 0x78); | hi_new = b->hi; | | return hi_old ^ hi_new; | } ... which GCC 12.1.0 compiles as: | 0000000000000000 <foo>: | 0: d503233f paciasp | 4: aa0003e4 mov x4, x0 | 8: 1400000e b 40 <foo+0x40> | c: d2800240 mov x0, #0x12 // beagleboard#18 | 10: d2800681 mov x1, #0x34 // beagleboard#52 | 14: aa0003e5 mov x5, x0 | 18: aa0103e6 mov x6, x1 | 1c: d2800ac2 mov x2, #0x56 // beagleboard#86 | 20: d2800f03 mov x3, #0x78 // beagleboard#120 | 24: 48207c82 casp x0, x1, x2, x3, [x4] | 28: ca050000 eor x0, x0, x5 | 2c: ca060021 eor x1, x1, x6 | 30: aa010000 orr x0, x0, x1 | 34: d2800000 mov x0, #0x0 // #0 <--- BANG | 38: d50323bf autiasp | 3c: d65f03c0 ret | 40: d2800240 mov x0, #0x12 // beagleboard#18 | 44: d2800681 mov x1, #0x34 // beagleboard#52 | 48: d2800ac2 mov x2, #0x56 // beagleboard#86 | 4c: d2800f03 mov x3, #0x78 // beagleboard#120 | 50: f9800091 prfm pstl1strm, [x4] | 54: c87f1885 ldxp x5, x6, [x4] | 58: ca0000a5 eor x5, x5, x0 | 5c: ca0100c6 eor x6, x6, x1 | 60: aa0600a6 orr x6, x5, x6 | 64: b5000066 cbnz x6, 70 <foo+0x70> | 68: c8250c82 stxp w5, x2, x3, [x4] | 6c: 35ffff45 cbnz w5, 54 <foo+0x54> | 70: d2800000 mov x0, #0x0 // #0 <--- BANG | 74: d50323bf autiasp | 78: d65f03c0 ret Notice that at the lines with "BANG" comments, GCC has assumed that the higher 8 bytes are unchanged by the cmpxchg_double() call, and that `hi_old ^ hi_new` can be reduced to a constant zero, for both LSE and LL/SC versions of cmpxchg_double(). This patch fixes the issue by passing a pointer to __uint128_t into the +Q constraint, ensuring that the compiler hazards against the entire 16 bytes being modified. With this change, GCC 12.1.0 compiles the above test as: | 0000000000000000 <foo>: | 0: f9400407 ldr x7, [x0, beagleboard#8] | 4: d503233f paciasp | 8: aa0003e4 mov x4, x0 | c: 1400000f b 48 <foo+0x48> | 10: d2800240 mov x0, #0x12 // beagleboard#18 | 14: d2800681 mov x1, #0x34 // beagleboard#52 | 18: aa0003e5 mov x5, x0 | 1c: aa0103e6 mov x6, x1 | 20: d2800ac2 mov x2, #0x56 // beagleboard#86 | 24: d2800f03 mov x3, #0x78 // beagleboard#120 | 28: 48207c82 casp x0, x1, x2, x3, [x4] | 2c: ca050000 eor x0, x0, x5 | 30: ca060021 eor x1, x1, x6 | 34: aa010000 orr x0, x0, x1 | 38: f9400480 ldr x0, [x4, beagleboard#8] | 3c: d50323bf autiasp | 40: ca0000e0 eor x0, x7, x0 | 44: d65f03c0 ret | 48: d2800240 mov x0, #0x12 // beagleboard#18 | 4c: d2800681 mov x1, #0x34 // beagleboard#52 | 50: d2800ac2 mov x2, #0x56 // beagleboard#86 | 54: d2800f03 mov x3, #0x78 // beagleboard#120 | 58: f9800091 prfm pstl1strm, [x4] | 5c: c87f1885 ldxp x5, x6, [x4] | 60: ca0000a5 eor x5, x5, x0 | 64: ca0100c6 eor x6, x6, x1 | 68: aa0600a6 orr x6, x5, x6 | 6c: b5000066 cbnz x6, 78 <foo+0x78> | 70: c8250c82 stxp w5, x2, x3, [x4] | 74: 35ffff45 cbnz w5, 5c <foo+0x5c> | 78: f9400480 ldr x0, [x4, beagleboard#8] | 7c: d50323bf autiasp | 80: ca0000e0 eor x0, x7, x0 | 84: d65f03c0 ret ... sampling the high 8 bytes before and after the cmpxchg, and performing an EOR, as we'd expect. For backporting, I've tested this atop linux-4.9.y with GCC 5.5.0. Note that linux-4.9.y is oldest currently supported stable release, and mandates GCC 5.1+. Unfortunately I couldn't get a GCC 5.1 binary to run on my machines due to library incompatibilities. I've also used a standalone test to check that we can use a __uint128_t pointer in a +Q constraint at least as far back as GCC 4.8.5 and LLVM 3.9.1. Fixes: 5284e1b ("arm64: xchg: Implement cmpxchg_double") Fixes: e9a4b79 ("arm64: cmpxchg_dbl: patch in lse instructions when supported by the CPU") Reported-by: Boqun Feng <boqun.feng@gmail.com> Link: https://lore.kernel.org/lkml/Y6DEfQXymYVgL3oJ@boqun-archlinux/ Reported-by: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/lkml/Y6GXoO4qmH9OIZ5Q@hirez.programming.kicks-ass.net/ Signed-off-by: Mark Rutland <mark.rutland@arm.com> Cc: stable@vger.kernel.org Cc: Arnd Bergmann <arnd@arndb.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Steve Capper <steve.capper@arm.com> Cc: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20230104151626.3262137-1-mark.rutland@arm.com Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>

commit ee4d098 upstream. When there are memory-only nodes (nodes without CPUs), these nodes are not properly initialized, causing kernel panic during boot. of_numa_init of_numa_parse_cpu_nodes node_set(nid, numa_nodes_parsed); of_numa_parse_memory_nodes In of_numa_parse_cpu_nodes, numa_nodes_parsed gets updated only for nodes containing CPUs. Memory-only nodes should have been updated in of_numa_parse_memory_nodes, but they weren't. Subsequently, when free_area_init() attempts to access NODE_DATA() for these uninitialized memory nodes, the kernel panics due to NULL pointer dereference. This can be reproduced on ARM64 QEMU with 1 CPU and 2 memory nodes: qemu-system-aarch64 \ -cpu host -nographic \ -m 4G -smp 1 \ -machine virt,accel=kvm,gic-version=3,iommu=smmuv3 \ -object memory-backend-ram,size=2G,id=mem0 \ -object memory-backend-ram,size=2G,id=mem1 \ -numa node,nodeid=0,memdev=mem0 \ -numa node,nodeid=1,memdev=mem1 \ -kernel $IMAGE \ -hda $DISK \ -append "console=ttyAMA0 root=/dev/vda rw earlycon" [ 0.000000] Booting Linux on physical CPU 0x0000000000 [0x481fd010] [ 0.000000] Linux version 6.17.0-rc1-00001-gabb4b3daf18c-dirty (yintirui@local) (gcc (GCC) 12.3.1, GNU ld (GNU Binutils) 2.41) #52 SMP PREEMPT Mon Aug 18 09:49:40 CST 2025 [ 0.000000] KASLR enabled [ 0.000000] random: crng init done [ 0.000000] Machine model: linux,dummy-virt [ 0.000000] efi: UEFI not found. [ 0.000000] earlycon: pl11 at MMIO 0x0000000009000000 (options '') [ 0.000000] printk: legacy bootconsole [pl11] enabled [ 0.000000] OF: reserved mem: Reserved memory: No reserved-memory node in the DT [ 0.000000] NODE_DATA(0) allocated [mem 0xbfffd9c0-0xbfffffff] [ 0.000000] node 1 must be removed before remove section 23 [ 0.000000] Zone ranges: [ 0.000000] DMA [mem 0x0000000040000000-0x00000000ffffffff] [ 0.000000] DMA32 empty [ 0.000000] Normal [mem 0x0000000100000000-0x000000013fffffff] [ 0.000000] Movable zone start for each node [ 0.000000] Early memory node ranges [ 0.000000] node 0: [mem 0x0000000040000000-0x00000000bfffffff] [ 0.000000] node 1: [mem 0x00000000c0000000-0x000000013fffffff] [ 0.000000] Initmem setup node 0 [mem 0x0000000040000000-0x00000000bfffffff] [ 0.000000] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a0 [ 0.000000] Mem abort info: [ 0.000000] ESR = 0x0000000096000004 [ 0.000000] EC = 0x25: DABT (current EL), IL = 32 bits [ 0.000000] SET = 0, FnV = 0 [ 0.000000] EA = 0, S1PTW = 0 [ 0.000000] FSC = 0x04: level 0 translation fault [ 0.000000] Data abort info: [ 0.000000] ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 [ 0.000000] CM = 0, WnR = 0, TnD = 0, TagAccess = 0 [ 0.000000] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [ 0.000000] [00000000000000a0] user address but active_mm is swapper [ 0.000000] Internal error: Oops: 0000000096000004 [#1] SMP [ 0.000000] Modules linked in: [ 0.000000] CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 6.17.0-rc1-00001-g760c6dabf762-dirty #54 PREEMPT [ 0.000000] Hardware name: linux,dummy-virt (DT) [ 0.000000] pstate: 800000c5 (Nzcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 0.000000] pc : free_area_init+0x50c/0xf9c [ 0.000000] lr : free_area_init+0x5c0/0xf9c [ 0.000000] sp : ffffa02ca0f33c00 [ 0.000000] x29: ffffa02ca0f33cb0 x28: 0000000000000000 x27: 0000000000000000 [ 0.000000] x26: 4ec4ec4ec4ec4ec5 x25: 00000000000c0000 x24: 00000000000c0000 [ 0.000000] x23: 0000000000040000 x22: 0000000000000000 x21: ffffa02ca0f3b368 [ 0.000000] x20: ffffa02ca14c7b98 x19: 0000000000000000 x18: 0000000000000002 [ 0.000000] x17: 000000000000cacc x16: 0000000000000001 x15: 0000000000000001 [ 0.000000] x14: 0000000080000000 x13: 0000000000000018 x12: 0000000000000002 [ 0.000000] x11: ffffa02ca0fd4f00 x10: ffffa02ca14bab20 x9 : ffffa02ca14bab38 [ 0.000000] x8 : 00000000000c0000 x7 : 0000000000000001 x6 : 0000000000000002 [ 0.000000] x5 : 0000000140000000 x4 : ffffa02ca0f33c90 x3 : ffffa02ca0f33ca0 [ 0.000000] x2 : ffffa02ca0f33c98 x1 : 0000000080000000 x0 : 0000000000000001 [ 0.000000] Call trace: [ 0.000000] free_area_init+0x50c/0xf9c (P) [ 0.000000] bootmem_init+0x110/0x1dc [ 0.000000] setup_arch+0x278/0x60c [ 0.000000] start_kernel+0x70/0x748 [ 0.000000] __primary_switched+0x88/0x90 [ 0.000000] Code: d503201f b98093e0 52800016 f8607a93 (f9405260) [ 0.000000] ---[ end trace 0000000000000000 ]--- [ 0.000000] Kernel panic - not syncing: Attempted to kill the idle task! [ 0.000000] ---[ end Kernel panic - not syncing: Attempted to kill the idle task! ]--- Link: https://lkml.kernel.org/r/20250819075510.2079961-1-yintirui@huawei.com Fixes: 7675076 ("arch_numa: switch over to numa_memblks") Signed-off-by: Yin Tirui <yintirui@huawei.com> Acked-by: David Hildenbrand <david@redhat.com> Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Chen Jun <chenjun102@huawei.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Joanthan Cameron <Jonathan.Cameron@huawei.com> Cc: Rob Herring <robh@kernel.org> Cc: Saravana Kannan <saravanak@google.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

vinifr closed this Dec 6, 2015

RobertCNelson added a commit to RobertCNelson/ti-linux-kernel-dev that referenced this pull request Dec 9, 2015

Add support for Olimex AM3352-SOM

8ff4d8e

fixes: beagleboard/linux#53 fixes: beagleboard/linux#52 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

RobertCNelson added a commit to RobertCNelson/ti-linux-kernel-dev that referenced this pull request Dec 9, 2015

Add support for Olimex AM3352-SOM

d9e6a62

fixes: beagleboard/linux#53 fixes: beagleboard/linux#52 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

RobertCNelson added a commit to RobertCNelson/dtb-rebuilder that referenced this pull request Dec 9, 2015

Add support for Olimex AM3352-SOM

ebad9b5

fixes: beagleboard/linux#53 fixes: beagleboard/linux#52 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

thess pushed a commit to thess/ti-linux-kernel-dev that referenced this pull request Dec 10, 2015

Add support for Olimex AM3352-SOM

1eca5df

fixes: beagleboard/linux#53 fixes: beagleboard/linux#52 Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

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