Message-ID: <CAPv3WKc8VrgH+aAfHBMwvuOxP17SnXCajtzpxmXf4rt+WFcE-w@mail.gmail.com>
Date:	Tue, 1 Dec 2015 22:40:14 +0100
From:	Marcin Wojtas <mw@...ihalf.com>
To:	Gregory CLEMENT <gregory.clement@...e-electrons.com>
Cc:	linux-kernel@...r.kernel.org,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>, netdev@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Andrew Lunn <andrew@...n.ch>,
	Jason Cooper <jason@...edaemon.net>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Simon Guinot <simon.guinot@...uanux.org>, nadavh@...vell.com,
	Lior Amsalem <alior@...vell.com>,
	Evan Wang <xswang@...vell.com>,
	Yair Mahalalel <myair@...vell.com>, nitroshift@...oo.com,
	Grzegorz Jaszczyk <jaz@...ihalf.com>,
	Tomasz Nowicki <tn@...ihalf.com>
Subject: Re: [PATCH 00/13] mvneta Buffer Management and enhancements

Hi Gregory,

Thanks for the log. I think it may be an overall problem with 4GB size
representation in mvebu_mbus_dram_info structure? Maybe whole DRAM
space is associated to CS0, and the 4GB size (0x1 0000 0000) does not
fit u32 variable?

Best regards,
Marcin

2015-12-01 14:12 GMT+01:00 Gregory CLEMENT <gregory.clement@...e-electrons.com>:
> Hi Marcin,
>
>  On lun., nov. 30 2015, Marcin Wojtas <mw@...ihalf.com> wrote:
> [...]
>>>> 5. Enable BM on Armada XP and 38X development boards - those ones and
>>>> A370 I could check on my own. In all cases they survived night-long
>>>> linerate iperf. Also tests were performed with A388 SoC working as a
>>>> network bridge between two packet generators. They showed increase of
>>>> maximum processed 64B packets by ~20k (~555k packets with BM enabled
>>>> vs ~535 packets without BM). Also when pushing 1500B-packets with a
>>>> line rate achieved, CPU load decreased from around 25% without BM vs
>>>> 18-20% with BM.
>>>
>>> I was trying to test the BM part of tour series on the Armada XP GP
>>> board. However it failed very quickly during the pool allocation. After
>>> a first debug I found that the size of the cs used in the
>>> mvebu_mbus_dram_info struct was 0. I have applied your series on a
>>> v4.4-rc1 kernel. At this stage I don't know if it is a regression in the
>>> mbus driver, a misconfiguration on my side or something else.
>>>
>>> Does it ring a bell for you?
>>
>> Frankly, I'm a bit surprised, I've never seen such problems on any of
>> the boards (AXP-GP/DB, A38X-DB/GP/AP). Did mvebu_mbus_dram_win_info
>> function exit with an error? Can you please apply below diff:
>> http://pastebin.com/2ws1txWk
>
> Yes it exited with errors and I added the same kind traces. It was how I
> knew that the size was 0!
>
> I've just rebuild a fresh kernel using mvebu_v7_defconfig and adding
> your patch, I got the same issue (see the log at the end of the email.)
>
>
> But the good news is that on the same kernel on Armada 388 GP the pool
> allocation does not fail. I really suspect an issue with my u-boot.
>
>
>> And send me a full log beginning from u-boot?
>>
>>>
>>> How do you test test it exactly?
>>> Especially on which kernel and with which U-Boot?
>>>
>>
>> I've just re-built the patchset I sent, which is on top of 4.4-rc1.
>>
>> I use AXP-GP, 78460 @ 1600MHz, 2GB DRAM, and everything works fine. My
>> u-boot version: v2011.12 2014_T2.0_eng_dropv2.
>
> My config is AXP-GP, 78460 @ 1300MHz, 8GB DRAM (only 4GB are used
> because I didn't activated LPAE), but the main difference is the U-Boot
> version: v2011.12 2014_T2.eng_dropv1.ATAG-test02.
>
> Thanks,
>
> Gregory
>
>
> [    0.000000] Booting Linux on physical CPU 0x0
> [    0.000000] Linux version 4.4.0-rc1-00013-g76f111f9bdf8-dirty (gclement@...laptop) (gcc version 5.2.1 20151010 (Ubuntu 5.2.1-22ubuntu1) ) #1024 SMP Tue Dec 1 14:02:52 CET 2015
> [    0.000000] CPU: ARMv7 Processor [562f5842] revision 2 (ARMv7), cr=10c5387d
> [    0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache
> [    0.000000] Machine model: Marvell Armada XP Development Board DB-MV784MP-GP
> [    0.000000] Memory policy: Data cache writealloc
> [    0.000000] PERCPU: Embedded 12 pages/cpu @ee1ac000 s18752 r8192 d22208 u49152
> [    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 981504
> [    0.000000] Kernel command line: console=ttyS0,115200 earlyprintk mvneta.rxq_def=2
> [    0.000000] log_buf_len individual max cpu contribution: 4096 bytes
> [    0.000000] log_buf_len total cpu_extra contributions: 12288 bytes
> [    0.000000] log_buf_len min size: 16384 bytes
> [    0.000000] log_buf_len: 32768 bytes
> [    0.000000] early log buf free: 14924(91%)
> [    0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)
> [    0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
> [    0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
> [    0.000000] Memory: 3888204K/3932160K available (5576K kernel code, 251K rwdata, 1544K rodata, 4460K init, 207K bss, 43956K reserved, 0K cma-reserved, 3145728K highmem)
> [    0.000000] Virtual kernel memory layout:
> [    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
> [    0.000000]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
> [    0.000000]     vmalloc : 0xf0800000 - 0xff800000   ( 240 MB)
> [    0.000000]     lowmem  : 0xc0000000 - 0xf0000000   ( 768 MB)
> [    0.000000]     pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)
> [    0.000000]     modules : 0xbf000000 - 0xbfe00000   (  14 MB)
> [    0.000000]       .text : 0xc0008000 - 0xc06fc374   (7121 kB)
> [    0.000000]       .init : 0xc06fd000 - 0xc0b58000   (4460 kB)
> [    0.000000]       .data : 0xc0b58000 - 0xc0b96d00   ( 252 kB)
> [    0.000000]        .bss : 0xc0b96d00 - 0xc0bcaa58   ( 208 kB)
> [    0.000000] Hierarchical RCU implementation.
> [    0.000000]  Build-time adjustment of leaf fanout to 32.
> [    0.000000] NR_IRQS:16 nr_irqs:16 16
> [    0.000000] L2C: DT/platform modifies aux control register: 0x1a69ef10 -> 0x1a69ef12
> [    0.000000] Aurora cache controller enabled, 32 ways, 2048 kB
> [    0.000000] Aurora: CACHE_ID 0x00000100, AUX_CTRL 0x1a69ef12
> [    0.000000] Switching to timer-based delay loop, resolution 40ns
> [    0.000004] sched_clock: 32 bits at 25MHz, resolution 40ns, wraps every 85899345900ns
> [    0.000015] clocksource: armada_370_xp_clocksource: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 76450417870 ns
> [    0.000305] Console: colour dummy device 80x30
> [    0.000322] Calibrating delay loop (skipped), value calculated using timer frequency.. 50.00 BogoMIPS (lpj=250000)
> [    0.000332] pid_max: default: 32768 minimum: 301
> [    0.000417] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes)
> [    0.000425] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 bytes)
> [    0.000737] CPU: Testing write buffer coherency: ok
> [    0.000880] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
> [    0.001006] Setting up static identity map for 0x8280 - 0x82d8
> [    0.001224] mvebu-soc-id: MVEBU SoC ID=0x7846, Rev=0x2
> [    0.001321] mvebu-pmsu: Initializing Power Management Service Unit
> [    0.002062] Booting CPU 1
> [    0.004402] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
> [    0.004645] Booting CPU 2
> [    0.006984] CPU2: thread -1, cpu 2, socket 0, mpidr 80000002
> [    0.007219] Booting CPU 3
> [    0.009558] CPU3: thread -1, cpu 3, socket 0, mpidr 80000003
> [    0.009605] Brought up 4 CPUs
> [    0.009615] SMP: Total of 4 processors activated (200.00 BogoMIPS).
> [    0.009620] CPU: All CPU(s) started in SVC mode.
> [    0.009957] devtmpfs: initialized
> [    0.012369] VFP support v0.3: implementor 56 architecture 2 part 20 variant 9 rev 6
> [    0.012525] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
> [    0.012657] pinctrl core: initialized pinctrl subsystem
> [    0.013188] NET: Registered protocol family 16
> [    0.013368] DMA: preallocated 256 KiB pool for atomic coherent allocations
> [    0.040064] cpuidle: using governor ladder
> [    0.070061] cpuidle: using governor menu
> [    0.075168] hw-breakpoint: Debug register access (0xee003e17) caused undefined instruction on CPU 3
> [    0.075172] hw-breakpoint: Debug register access (0xee003e17) caused undefined instruction on CPU 1
> [    0.075176] hw-breakpoint: Debug register access (0xee003e17) caused undefined instruction on CPU 2
> [    0.075179] hw-breakpoint: CPU 1 failed to disable vector catch
> [    0.075196] hw-breakpoint: Debug register access (0xee003e17) caused undefined instruction on CPU 0
> [    0.110815] vgaarb: loaded
> [    0.110981] SCSI subsystem initialized
> [    0.111306] usbcore: registered new interface driver usbfs
> [    0.111349] usbcore: registered new interface driver hub
> [    0.111398] usbcore: registered new device driver usb
> [    0.111640] Advanced Linux Sound Architecture Driver Initialized.
> [    0.111991] Bluetooth: Core ver 2.21
> [    0.112024] NET: Registered protocol family 31
> [    0.112029] Bluetooth: HCI device and connection manager initialized
> [    0.112040] Bluetooth: HCI socket layer initialized
> [    0.112048] Bluetooth: L2CAP socket layer initialized
> [    0.112067] Bluetooth: SCO socket layer initialized
> [    0.112462] clocksource: Switched to clocksource armada_370_xp_clocksource
> [    0.119267] NET: Registered protocol family 2
> [    0.119629] TCP established hash table entries: 8192 (order: 3, 32768 bytes)
> [    0.119690] TCP bind hash table entries: 8192 (order: 4, 65536 bytes)
> [    0.119749] TCP: Hash tables configured (established 8192 bind 8192)
> [    0.119791] UDP hash table entries: 512 (order: 2, 16384 bytes)
> [    0.119814] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
> [    0.119945] NET: Registered protocol family 1
> [    0.120143] RPC: Registered named UNIX socket transport module.
> [    0.120150] RPC: Registered udp transport module.
> [    0.120155] RPC: Registered tcp transport module.
> [    0.120160] RPC: Registered tcp NFSv4.1 backchannel transport module.
> [    0.290263] hw perfevents: enabled with armv7_cortex_a9 PMU driver, 7 counters available
> [    0.291305] futex hash table entries: 1024 (order: 4, 65536 bytes)
> [    0.292696] bounce: pool size: 64 pages
> [    0.292746] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252)
> [    0.292758] io scheduler noop registered
> [    0.292766] io scheduler deadline registered
> [    0.292779] io scheduler cfq registered (default)
> [    0.293754] armada-xp-pinctrl f1018000.pin-ctrl: registered pinctrl driver
> [    0.294186] irq: Cannot allocate irq_descs @ IRQ48, assuming pre-allocated
> [    0.294451] irq: Cannot allocate irq_descs @ IRQ80, assuming pre-allocated
> [    0.294612] irq: Cannot allocate irq_descs @ IRQ112, assuming pre-allocated
> [    0.295033] mv_xor f1060900.xor: Marvell shared XOR driver
> [    0.332873] mv_xor f1060900.xor: Marvell XOR (Registers Mode): ( xor cpy intr )
> [    0.372848] mv_xor f1060900.xor: Marvell XOR (Registers Mode): ( xor cpy intr )
> [    0.372958] mv_xor f10f0900.xor: Marvell shared XOR driver
> [    0.412850] mv_xor f10f0900.xor: Marvell XOR (Registers Mode): ( xor cpy intr )
> [    0.452845] mv_xor f10f0900.xor: Marvell XOR (Registers Mode): ( xor cpy intr )
> [    0.492634] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
> [    0.493897] console [ttyS0] disabled
> [    0.514007] f1012000.serial: ttyS0 at MMIO 0xf1012000 (irq = 20, base_baud = 15625000) is a 16550A
> [    1.200947] console [ttyS0] enabled
> [    1.225041] f1012100.serial: ttyS1 at MMIO 0xf1012100 (irq = 21, base_baud = 15625000) is a 16550A
> [    1.254648] f1012200.serial: ttyS2 at MMIO 0xf1012200 (irq = 33, base_baud = 15625000) is a 16550A
> [    1.284237] f1012300.serial: ttyS3 at MMIO 0xf1012300 (irq = 34, base_baud = 15625000) is a 16550A
> [    1.294303] sata_mv f10a0000.sata: slots 32 ports 2
> [    1.300098] scsi host0: sata_mv
> [    1.303511] scsi host1: sata_mv
> [    1.306805] ata1: SATA max UDMA/133 irq 31
> [    1.310913] ata2: SATA max UDMA/133 irq 31
> [    1.315482] pxa3xx-nand f10d0000.nand: This platform can't do DMA on this device
> [    1.323280] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0x38
> [    1.329650] nand: Micron MT29F8G08ABABAWP
> [    1.333684] nand: 1024 MiB, SLC, erase size: 512 KiB, page size: 4096, OOB size: 224
> [    1.341450] pxa3xx-nand f10d0000.nand: ECC strength 16, ECC step size 2048
> [    1.349163] Bad block table found at page 261888, version 0x01
> [    1.355385] Bad block table found at page 262016, version 0x01
> [    1.364466] pxa3xx_nand-0: 'partitions' subnode not found on /soc/internal-regs/nand@...00. Trying to parse direct subnodes as partitions.
> [    1.378215] m25p80 spi0.0: n25q128a13 (16384 Kbytes)
> [    1.385098] spi0.0: 'partitions' subnode not found on /soc/internal-regs/spi@...00/spi-flash@0. Trying to parse direct subnodes as partitions.
> [    1.399136] libphy: Fixed MDIO Bus: probed
> [    1.403396] libphy: orion_mdio_bus: probed
> [    1.415856] mvneta_bm f10c0000.bm: Buffer Manager for network controller enabled
> [    1.424232] size = 0x0, target = 0x0, attr = 0x1e
> [    1.428949] mvebu_mbus: invalid dram address 0x2d194000
> [    1.434204] mvneta_bm f10c0000.bm: fail to create pool 0
> [    1.439532] mvneta f1070000.ethernet eth0: fail to obtain long pool for port
> [    1.446607] mvneta f1070000.ethernet: use SW buffer management
> [    1.452696] mvneta f1070000.ethernet eth0: Using hardware mac address 00:50:43:68:1c:28
> [    1.461529] size = 0x0, target = 0x0, attr = 0x1e
> [    1.466258] mvebu_mbus: invalid dram address 0x2d198000
> [    1.471501] mvneta_bm f10c0000.bm: fail to create pool 1
> [    1.476836] mvneta f1074000.ethernet eth1: fail to obtain long pool for port
> [    1.483910] mvneta f1074000.ethernet: use SW buffer management
> [    1.489994] mvneta f1074000.ethernet eth1: Using random mac address be:14:de:e2:be:cf
> [    1.498661] size = 0x0, target = 0x0, attr = 0x1e
> [    1.503391] mvebu_mbus: invalid dram address 0x2d10c000
> [    1.508633] mvneta_bm f10c0000.bm: fail to create pool 2
> [    1.513968] mvneta f1030000.ethernet eth2: fail to obtain long pool for port
> [    1.521035] mvneta f1030000.ethernet: use SW buffer management
> [    1.527121] mvneta f1030000.ethernet eth2: Using random mac address 86:3c:f8:02:31:cf
> [    1.535810] size = 0x0, target = 0x0, attr = 0x1e
> [    1.540527] mvebu_mbus: invalid dram address 0x2d752000
> [    1.545781] mvneta_bm f10c0000.bm: fail to create pool 3
> [    1.551108] mvneta f1034000.ethernet eth3: fail to obtain long pool for port
> [    1.558182] mvneta f1034000.ethernet: use SW buffer management
> [    1.564269] mvneta f1034000.ethernet eth3: Using random mac address 7e:3e:74:8c:93:50
> [    1.572297] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> [    1.578863] ehci-pci: EHCI PCI platform driver
> [    1.583371] ehci-orion: EHCI orion driver
> [    1.587476] orion-ehci f1050000.usb: EHCI Host Controller
> [    1.592916] orion-ehci f1050000.usb: new USB bus registered, assigned bus number 1
> [    1.600567] orion-ehci f1050000.usb: irq 27, io mem 0xf1050000
> [    1.622494] orion-ehci f1050000.usb: USB 2.0 started, EHCI 1.00
> [    1.628967] hub 1-0:1.0: USB hub found
> [    1.632806] hub 1-0:1.0: 1 port detected
> [    1.637018] orion-ehci f1051000.usb: EHCI Host Controller
> [    1.642468] orion-ehci f1051000.usb: new USB bus registered, assigned bus number 2
> [    1.650111] orion-ehci f1051000.usb: irq 28, io mem 0xf1051000
> [    1.672467] orion-ehci f1051000.usb: USB 2.0 started, EHCI 1.00
> [    1.678908] hub 2-0:1.0: USB hub found
> [    1.682736] hub 2-0:1.0: 1 port detected
> [    1.687203] usbcore: registered new interface driver usb-storage
> [    1.693454] mousedev: PS/2 mouse device common for all mice
> [    1.699593] rtc-mv f1010300.rtc: rtc core: registered f1010300.rtc as rtc0
> [    1.706641] i2c /dev entries driver
> [    1.711074] orion_wdt: Initial timeout 171 sec
> [    1.715770] cpu: dev_pm_opp_of_cpumask_add_table: couldn't find opp table for cpu:0, -19
> [    1.723985] cpu: dev_pm_opp_of_cpumask_add_table: couldn't find opp table for cpu:1, -19
> [    1.732174] cpu: dev_pm_opp_of_cpumask_add_table: couldn't find opp table for cpu:2, -19
> [    1.740372] cpu: dev_pm_opp_of_cpumask_add_table: couldn't find opp table for cpu:3, -19
> [    1.748968] sdhci: Secure Digital Host Controller Interface driver
> [    1.755176] sdhci: Copyright(c) Pierre Ossman
> [    1.759723] sdhci-pltfm: SDHCI platform and OF driver helper
> [    1.765805] usbcore: registered new interface driver usbhid
> [    1.771394] usbhid: USB HID core driver
> [    1.775730] f0000000.nor: Found 1 x16 devices at 0x0 in 16-bit bank. Manufacturer ID 0x000089 Chip ID 0x000018
> [    1.785775] Intel/Sharp Extended Query Table at 0x0031
> [    1.790936] Intel/Sharp Extended Query Table at 0x0031
> [    1.796106] Using buffer write method
> [    1.799778] cfi_cmdset_0001: Erase suspend on write enabled
> [    1.809269] f0000000.nor: 'partitions' subnode not found on /soc/devbus-bootcs/nor@0. Trying to parse direct subnodes as partitions.
> [    1.822513] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl F300)
> [    1.829037] NET: Registered protocol family 10
> [    1.834180] sit: IPv6 over IPv4 tunneling driver
> [    1.839209] NET: Registered protocol family 17
> [    1.842687] ata1.00: ATA-9: TS8GHSD310, 20111220, max UDMA/133
> [    1.842692] ata1.00: 15621984 sectors, multi 1: LBA48 NCQ (depth 31/32)
> [    1.856343] ThumbEE CPU extension supported.
> [    1.860632] Registering SWP/SWPB emulation handler
> [    1.862685] ata1.00: configured for UDMA/133
> [    1.862993] scsi 0:0:0:0: Direct-Access     ATA      TS8GHSD310       1220 PQ: 0 ANSI: 5
> [    1.863646] sd 0:0:0:0: [sda] 15621984 512-byte logical blocks: (7.99 GB/7.44 GiB)
> [    1.863838] sd 0:0:0:0: [sda] Write Protect is off
> [    1.863907] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
> [    1.873801]  sda: sda1 sda2 sda3 < sda5 > sda4
> [    1.875389] sd 0:0:0:0: [sda] Attached SCSI disk
> [    1.909334] rtc-mv f1010300.rtc: setting system clock to 2001-01-20 07:57:42 UTC (979977462)
> [    1.918901] ALSA device list:
> [    1.921878]   No soundcards found.
> [    2.222505] ata2: SATA link down (SStatus 0 SControl F300)
> [    2.230484] Freeing unused kernel memory: 4460K (c06fd000 - c0b58000)
>
> --
> Gregory Clement, Free Electrons
> Kernel, drivers, real-time and embedded Linux
> development, consulting, training and support.
> http://free-electrons.com
--
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