i.MX6Q PCIe EP/RC Validation and Throughput
Hardware setup
* Two i.MX6Q SD boards, one is used as PCIe RC; the other one is used as PCIe EP. Connected by 2*mini_PCIe to standard_PCIe adaptors, 2*PEX cable adaptors, and one PCIe cable.
Software configurations
* When building RC image, make sure that
CONFIG_IMX_PCIE=y
# CONFIG_IMX_PCIE_EP_MODE_IN_EP_RC_SYS is not set
CONFIG_IMX_PCIE_RC_MODE_IN_EP_RC_SYS=y
* When build EP image, make sure that
CONFIG_IMX_PCIE=y
CONFIG_IMX_PCIE_EP_MODE_IN_EP_RC_SYS=y
# CONFIG_IMX_PCIE_RC_MODE_IN_EP_RC_SYS is not set
Features
* Set-up link between RC and EP by their stand-alone 125MHz running internally.
* In EP's system, EP can access the reserved ddr memory (default address:0x40000000) of PCIe RC's system, by the interconnection between PCIe EP and PCIe RC.
NOTE: The layout of the 1G DDR memory on SD boards is 0x1000_0000 ~ 0x4FFF_FFFF)
Use mem=768M in the kernel command line to reserve the 0x4000_0000 ~ 0x4FFF_FFFF DDR memory space used to do the EP access tests.
(The example of the RC’s cmd-line: Kernel command line: noinitrd console=ttymxc0,115200 mem=768M root=/dev/nfs nfsroot=10.192.225.216:/home/r65037/nfs/rootfs_mx5x_10.11,v3,tcp ip=dhcp rw)
Throughput results
| ARM core used as the bus master, and cache is disabled | ARM core used as the bus master, and cache is enabled | IPU used as the bus master(DMA) | |
| Data size in one write tlp | 8 bytes | 32 bytes | 64 bytes |
| Write speed | ~109MB/s | ~298MB/s | ~344MB/s |
| Data size in one read tlp | 32 bytes | 64 bytes | 64 bytes |
| Read speed | ~29MB/s | ~100MB/s | ~211MB/s |
IPU used as the bus master(DMA)
Here is the summary of the PCIe throughput results tested by IPU.
Write speed is about 344 MB/s.
Read speed is about 211MB/s
ARM core used as the bus master (define EP_SELF_IO_TEST in pcie.c driver)
write speed ~300MB/s.
read speed ~100MB/s.
Cache is enabled.
PCIe EP: Starting data transfer...
PCIe EP: Data transfer is successful, tv_count1 54840us, tv_count2 162814us.
PCIe EP: Data write speed is 298MB/s.
PCIe EP: Data read speed is 100MB/s.
Regarding to the log, the data size of each TLP when cache is enabled, is about 4 times of the data size in write, and 2 times of the data size in read, when the cache is not enabled.
| Cache is disabled | Cache is enabled | |
| Data size in one write tlp | 8 bytes | 32 bytes |
| Write speed | ~109MB/s | ~298MB/s |
| Data size in one read tlp | 32 bytes | 64 bytes |
| Read speed | ~29MB/s | ~100MB/s |
Cache is not enabled
PCIe EP: Starting data transfer...
PCIe EP: Data transfer is successful, tv_count1 149616us, tv_count2 552099us.
PCIe EP: Data write speed is 109MB/s.
PCIe EP: Data read speed is 29MB/s.
One simple method used to connect the imx6 pcie ep and rc
View of the whole solution:
HW materials:
2* iMX6Q SD boards, 2* Mini PCIe to STD PCIe adaptors, one SATA2 data cable.
the mini-pcie to standard pcie exchange adaptor.
Here is the URL:
http://www.bplus.com.tw/Adapter/PM2C.html
How to make it.
signals connections
Two adaptors, one is named as A, the other one is named as B.
A B
TXM <----> RXM
TXN <----> RXN
RXM <----> TXM
RXN <----> TXN
A1 connected to B3
A2 connected to B4
A3 connected to B1
A4 connected to B2
Connect the cable to the adaptor.
Connect the SATA2 data cable to Mini PCIe to STD PCIe adaptor (A)
Connect the SATA2 data cable to Mini PCIe to STD PCIe adaptor (B)
NOTE:
* Please keep length of Cable as short as possible. Our cable is about 12cm.
* Please connect shield wire in SATA2 Cable to GND at both board.
* Please boot up PCIe EP system before booting PCIe RC system.
Base one imx_3.0.35 mainline, the patch, and the IPU test tools had been attached.
NOTE:
* IPU tests usage howto.
Unzip the xxx.zip, and run xxx_r.sh to do read tests, run xxx_w.sh to do the write tests.
Tests log:
EP:
root@freescale ~/pcie_ep_io_test$ ./pcie-r.sh
pass cmdline 14, ./pcie_ipudev_test.out
new option : c
frame count set 1
new option : l
loop count set 1
new option : i
input w=1024,h=1024,fucc=RGB4,cpx=0,cpy=0,cpw=0,cph=0,de=0,dm=0
new option : O
640,480,RGB4,0,0,0,0,0
new option : s
show to fb 0
new option : f
output file name ipu1-1st-ovfb
new option : ÿ
show_to_buf:0, input_paddr:0x1000000, output.paddr0x18800000
====== ipu task ======
input:
foramt: 0x34424752
width: 1024
height: 1024
crop.w = 1024
crop.h = 1024
crop.pos.x = 0
crop.pos.y = 0
output:
foramt: 0x34424752
width: 640
height: 480
roate: 0
crop.w = 640
crop.h = 480
crop.pos.x = 0
crop.pos.y = 0
total frame count 1 avg frame time 19019 us, fps 52.579000
root@freescale ~/pcie_ep_io_test$ ./pcie-w.sh
pass cmdline 14, ./pcie_ipudev_test.out
new option : c
frame count set 1
new option : l
loop count set 1
new option : i
input w=640,h=480,fucc=RGB4,cpx=0,cpy=0,cpw=0,cph=0,de=0,dm=0
new option : O
1024,1024,RGB4,0,0,0,0,0
new option : s
show to fb 1
new option : f
output file name ipu1-1st-ovfb
new option : ÿ
show_to_buf:1, input_paddr:0x18a00000, output.paddr0x1000000
====== ipu task ======
input:
foramt: 0x34424752
width: 640
height: 480
crop.w = 640
crop.h = 480
crop.pos.x = 0
crop.pos.y = 0
output:
foramt: 0x34424752
width: 1024
height: 1024
roate: 0
crop.w = 1024
crop.h = 1024
crop.pos.x = 0
crop.pos.y = 0
total frame count 1 avg frame time 11751 us, fps 85.099140
root@freescale ~$ ./memtool -32 01000000=deadbeaf
Writing 32-bit value 0xDEADBEAF to address 0x01000000
RC:
Before run "./memtool -32 01000000=deadbeaf" at EP.
root@freescale ~$ ./memtool -32 40000000 10
Reading 0x10 count starting at address 0x40000000
0x40000000: 00000000 00000000 00000000 00000000
0x40000010: 00000000 00000000 00000000 00000000
0x40000020: 00000000 00000000 00000000 00000000
0x40000030: 00000000 00000000 00000000 00000000
After run "./memtool -32 01000000=deadbeaf" at EP.
root@freescale ~$ ./memtool -32 40000000 10
Reading 0x10 count starting at address 0x40000000
0x40000000: DEADBEAF 00000000 00000000 00000000
0x40000010: 00000000 00000000 00000000 00000000
0x40000020: 00000000 00000000 00000000 00000000
0x40000030: 00000000 00000000 00000000 00000000
Hello Richard
I'm trying to use a Sabrelite board with IMX6Q as a PCIe EP.
I Created a PCIe Cable that goes from the PCIe Port (j23) to a little board where I have a molex connector, and that gets rooted to a FPC Flex connector all the way to the PCIe Goldfinger using one of those Raiser: http://www.bplustech.com/KZ/KZ-B21.html The schematic of this raiser can be found here: http://www.bplus.com.tw/PDF/KZ-B21_VER1_0_20130118A.pdf
Basically I Connect on the PCIe Goldfinger part the PRSNT1# -- PRSNT2# to tell the HOST PC that it's a x1 pcie:
then my setup could be resumed as:
GND -- GND
TXP -- RXP
TXM -- RXM
RXP -- TXP
RXM -- TXM
(http://whatsphere.com/pcie.jpeg)
Here is a view to the BOOT
Starting kernel ...
Uncompressing Linux... done, booting the kernel.
[ 0.000000] Linux version 3.0.35-2508-g54750ff (xavier@ubuntu) (gcc version 4.6.2 20110630 (prerelease) (Freescale MAD -- Linaro 2011.07 -- Built at 2011/08/10 09:20) ) #24 SMP PREEMPT Sun Nov 3
[ 0.000000] CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d
[ 0.000000] CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache
[ 0.000000] Machine: Freescale i.MX 6Quad Sabre-Lite Board
[ 0.000000] Memory policy: ECC disabled, Data cache writealloc
[ 0.000000] CPU identified as i.MX6Q, silicon rev 1.2
[ 0.000000] PERCPU: Embedded 7 pages/cpu @8c008000 s5440 r8192 d15040 u32768
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 227328
[ 0.000000] Kernel command line: enable_wait_mode=off video=mxcfb0:off video=mxcfb1:off video=mxcfb2:off console=ttymxc1,115200 vmalloc=400M consoleblank=0 rootwait root=/dev/mmcblk0p1
[ 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: 640MB 256MB = 896MB total
[ 0.000000] Memory: 896756k/896756k available, 151820k reserved, 0K highmem
[ 0.000000] Virtual kernel memory layout:
[ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)
[ 0.000000] fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)
[ 0.000000] DMA : 0xf4600000 - 0xffe00000 ( 184 MB)
[ 0.000000] vmalloc : 0xc0800000 - 0xf2000000 ( 792 MB)
[ 0.000000] lowmem : 0x80000000 - 0xc0000000 (1024 MB)
[ 0.000000] pkmap : 0x7fe00000 - 0x80000000 ( 2 MB)
[ 0.000000] modules : 0x7f000000 - 0x7fe00000 ( 14 MB)
[ 0.000000] .init : 0x80008000 - 0x8003b000 ( 204 kB)
[ 0.000000] .text : 0x8003b000 - 0x80aa62cc (10669 kB)
[ 0.000000] .data : 0x80aa8000 - 0x80b072c0 ( 381 kB)
[ 0.000000] .bss : 0x80b072e4 - 0x80b556ac ( 313 kB)
[ 0.000000] SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[ 0.000000] Preemptible hierarchical RCU implementation.
[ 0.000000] NR_IRQS:624
[ 0.000000] MXC GPIO hardware
[ 0.000000] sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 1431655ms
[ 0.000000] arm_max_freq=1GHz
[ 0.000000] MXC_Early serial console at MMIO 0x21e8000 (options '115200')
[ 0.000000] bootconsole [ttymxc1] enabled
[ 0.000000] Console: colour dummy device 80x30
[ 0.224540] Calibrating delay loop... 1581.05 BogoMIPS (lpj=7905280)
[ 0.312867] pid_max: default: 32768 minimum: 301
[ 0.317802] Mount-cache hash table entries: 512
[ 0.323097] CPU: Testing write buffer coherency: ok
[ 0.328254] hw perfevents: enabled with ARMv7 Cortex-A9 PMU driver, 7 counters available
[ 0.428774] CPU1: Booted secondary processor
[ 0.508778] CPU2: Booted secondary processor
[ 0.588792] CPU3: Booted secondary processor
[ 0.628290] Brought up 4 CPUs
[ 0.644115] SMP: Total of 4 processors activated (6324.22 BogoMIPS).
[ 0.667822] print_constraints: dummy:
[ 0.671823] NET: Registered protocol family 16
[ 0.680477] print_constraints: vddpu: 725 <--> 1300 mV at 1150 mV fast normal
[ 0.688013] print_constraints: vddcore: 725 <--> 1300 mV at 1150 mV fast normal
[ 0.695751] print_constraints: vddsoc: 725 <--> 1300 mV at 1200 mV fast normal
[ 0.703438] print_constraints: vdd2p5: 2000 <--> 2775 mV at 2400 mV fast normal
[ 0.711197] print_constraints: vdd1p1: 800 <--> 1400 mV at 1100 mV fast normal
[ 0.718839] print_constraints: vdd3p0: 2625 <--> 3400 mV at 3000 mV fast normal
[ 0.727742] **DEBUG mx6_sabrelite_board_init
[ 0.790388] **DEBUG imx_add_pcie
[ 0.793966] hw-breakpoint: found 6 breakpoint and 1 watchpoint registers.
[ 0.800798] hw-breakpoint: 1 breakpoint(s) reserved for watchpoint single-step.
[ 0.808143] hw-breakpoint: maximum watchpoint size is 4 bytes.
[ 0.814042] L310 cache controller enabled
[ 0.818071] l2x0: 16 ways, CACHE_ID 0x410000c7, AUX_CTRL 0x02070000, Cache size: 1048576 B
[ 0.849718] bio: create slab <bio-0> at 0
[ 0.857066] mxs-dma mxs-dma-apbh: initialized
[ 0.861759] print_constraints: vmmc: 3300 mV
[ 0.866817] vgaarb: loaded
[ 0.870369] SCSI subsystem initialized
[ 0.874931] spi_imx imx6q-ecspi.0: probed
[ 0.879688] usbcore: registered new interface driver usbfs
[ 0.885314] usbcore: registered new interface driver hub
[ 0.890798] usbcore: registered new device driver usb
[ 0.895867] Freescale USB OTG Driver loaded, $Revision: 1.55 $
[ 0.918287] imx-ipuv3 imx-ipuv3.0: IPU DMFC NORMAL mode: 1(0~1), 5B(4,5), 5F(6,7)
[ 0.938282] imx-ipuv3 imx-ipuv3.1: IPU DMFC NORMAL mode: 1(0~1), 5B(4,5), 5F(6,7)
[ 0.946109] mxc_mipi_csi2 mxc_mipi_csi2: i.MX MIPI CSI2 driver probed
[ 0.952586] mxc_mipi_csi2 mxc_mipi_csi2: i.MX MIPI CSI2 dphy version is 0x3130302a
[ 0.960308] MIPI CSI2 driver module loaded
[ 0.964632] Advanced Linux Sound Architecture Driver Version 1.0.24.
[ 0.971833] Bluetooth: Core ver 2.16
[ 0.975533] NET: Registered protocol family 31
[ 0.980001] Bluetooth: HCI device and connection manager initialized
[ 0.986377] Bluetooth: HCI socket layer initialized
[ 0.991277] Bluetooth: L2CAP socket layer initialized
[ 0.996429] Bluetooth: SCO socket layer initialized
[ 1.001760] cfg80211: Calling CRDA to update world regulatory domain
[ 1.008652] i2c-core: driver [max17135] using legacy suspend method
[ 1.014941] i2c-core: driver [max17135] using legacy resume method
[ 1.021168] Switching to clocksource mxc_timer1
[ 1.037670] NET: Registered protocol family 2
[ 1.042238] IP route cache hash table entries: 32768 (order: 5, 131072 bytes)
[ 1.050180] TCP established hash table entries: 131072 (order: 8, 1048576 bytes)
[ 1.059505] TCP bind hash table entries: 65536 (order: 7, 786432 bytes)
[ 1.067234] TCP: Hash tables configured (established 131072 bind 65536)
[ 1.073869] TCP reno registered
[ 1.077034] UDP hash table entries: 512 (order: 2, 16384 bytes)
[ 1.082999] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
[ 1.089789] NET: Registered protocol family 1
[ 1.094454] RPC: Registered named UNIX socket transport module.
[ 1.100408] RPC: Registered udp transport module.
[ 1.105126] RPC: Registered tcp transport module.
[ 1.109852] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 1.117195] Static Power Management for Freescale i.MX6
[ 1.122438] wait mode is disabled for i.MX6
[ 1.126812] cpaddr = c0880000 suspend_iram_base=c091c000
[ 1.132223] PM driver module loaded
[ 1.135722] **DEBUG imx_pcie_drv_init
[ 1.174919] **DEBUG imx_pcie_pltfm_probe
[ 1.178171] iMX6 PCIe PCIe EP mode imx_pcie_pltfm_probe entering.
[ 1.184380] PCIE: imx_pcie_pltfm_probe start link up.
[ 1.189459] PCIe EP: waiting for link up...
[ 15.540166] PCIe EP: link up.
[ 15.543512] IMX usb wakeup probe
[ 15.547195] add wake up source irq 75
[ 15.554446] IMX usb wakeup probe
[ 15.557952] cpu regulator mode:ldo_enable
[ 15.562170] i.MXC CPU frequency driver
[ 15.590899] JFFS2 version 2.2. (NAND) �© 2001-2006 Red Hat, Inc.
[ 15.597527] msgmni has been set to 1751
[ 15.602766] alg: No test for stdrng (krng)
[ 15.607030] io scheduler noop registered
[ 15.610966] io scheduler deadline registered
[ 15.615331] io scheduler cfq registered (default)
[ 15.621043] MIPI DSI driver module loaded
[ 15.625229] mxc_sdc_fb mxc_sdc_fb.0: Can't get fb option for mxcfb0!
[ 15.631641] mxc_sdc_fb mxc_sdc_fb.1: Can't get fb option for mxcfb1!
[ 15.638041] mxc_sdc_fb mxc_sdc_fb.2: Can't get fb option for mxcfb2!
[ 15.644430] mxc_sdc_fb mxc_sdc_fb.3: register mxc display driver ldb
[ 15.650830] _regulator_get: get() with no identifier
[ 15.667087] Console: switching to colour frame buffer device 160x50
[ 15.682241] imx-sdma imx-sdma: loaded firmware 1.1
[ 15.690972] imx-sdma imx-sdma: initialized
[ 15.814091] Serial: IMX driver
[ 15.817281] imx-uart.0: ttymxc0 at MMIO 0x2020000 (irq = 58) is a IMX
[ 15.824129] imx-uart.1: ttymxc1 at MMIO 0x21e8000 (irq = 59) is a IMX
[ 15.830620] console [ttymxc1] enabled, bootconsole disabled
[ 15.830620] console [ttymxc1] enabled, bootconsole disabled
[ 15.846998] loop: module loaded
[ 15.884600] No sata disk.
[ 15.888429] m25p80 spi0.0: sst25vf016b (2048 Kbytes)
[ 15.893400] Creating 2 MTD partitions on "m25p80":
[ 15.898209] 0x000000000000-0x000000100000 : "bootloader"
[ 15.904579] 0x000000100000-0x000000200000 : "kernel"
[ 15.910711] GPMI NAND driver registered. (IMX)
[ 15.916014] vcan: Virtual CAN interface driver
[ 15.920464] CAN device driver interface
[ 15.924304] flexcan netdevice driver
[ 15.928752] flexcan imx6q-flexcan.0: device registered (reg_base=c09e8000, irq=142)
[ 15.936542] FEC Ethernet Driver
[ 15.941717] fec_enet_mii_bus: probed
[ 15.946292] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 15.952944] fsl-ehci fsl-ehci.0: Freescale On-Chip EHCI Host Controller
[ 15.959594] fsl-ehci fsl-ehci.0: new USB bus registered, assigned bus number 1
[ 15.995767] fsl-ehci fsl-ehci.0: irq 75, io base 0x02184000
[ 16.015757] fsl-ehci fsl-ehci.0: USB 2.0 started, EHCI 1.00
[ 16.022008] hub 1-0:1.0: USB hub found
[ 16.025780] hub 1-0:1.0: 1 port detected
[ 16.029901] add wake up source irq 72
[ 16.033602] fsl-ehci fsl-ehci.1: Freescale On-Chip EHCI Host Controller
[ 16.040243] fsl-ehci fsl-ehci.1: new USB bus registered, assigned bus number 2
[ 16.075767] fsl-ehci fsl-ehci.1: irq 72, io base 0x02184200
[ 16.095755] fsl-ehci fsl-ehci.1: USB 2.0 started, EHCI 1.00
[ 16.101938] hub 2-0:1.0: USB hub found
[ 16.105702] hub 2-0:1.0: 1 port detected
[ 16.109947] Initializing USB Mass Storage driver...
[ 16.114988] usbcore: registered new interface driver usb-storage
[ 16.121010] USB Mass Storage support registered.
[ 16.125632] ARC USBOTG Device Controller driver (1 August 2005)
[ 16.132344] mousedev: PS/2 mouse device common for all mice
[ 16.138373] input: gpio-keys as /devices/platform/gpio-keys/input/input0
[ 16.145762] egalax_ts 2-0004: egalax_ts: failed to read firmware version
[ 16.152477] egalax_ts: probe of 2-0004 failed with error -5
[ 16.158557] i2c-core: driver [isl29023] using legacy suspend method
[ 16.164830] i2c-core: driver [isl29023] using legacy resume method
[ 16.171586] snvs_rtc snvs_rtc.0: rtc core: registered snvs_rtc as rtc0
[ 16.178258] i2c /dev entries driver
[ 16.182461] Linux video capture interface: v2.00
[ 16.187446] mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video16
[ 16.195068] mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video17
[ 16.202918] i2c-core: driver [mag3110] using legacy suspend method
[ 16.209139] i2c-core: driver [mag3110] using legacy resume method
[ 16.215645] imx2-wdt imx2-wdt.0: IMX2+ Watchdog Timer enabled. timeout=60s (nowayout=1)
[ 16.223761] Bluetooth: Virtual HCI driver ver 1.3
[ 16.228680] Bluetooth: HCI UART driver ver 2.2
[ 16.233128] Bluetooth: HCIATH3K protocol initialized
[ 16.238105] Bluetooth: Generic Bluetooth USB driver ver 0.6
[ 16.243804] usbcore: registered new interface driver btusb
[ 16.249437] sdhci: Secure Digital Host Controller Interface driver
[ 16.255623] sdhci: Copyright(c) Pierre Ossman
[ 16.260386] mmc0: SDHCI controller on platform [sdhci-esdhc-imx.3] using DMA
[ 16.267756] mmc1: SDHCI controller on platform [sdhci-esdhc-imx.2] using DMA
[ 16.275002] mxc_vdoa mxc_vdoa: i.MX Video Data Order Adapter(VDOA) driver probed
[ 16.286210] VPU initialized
[ 16.289955] mxc_asrc registered
[ 16.317073] Thermal calibration data is 0x5874c87d
[ 16.321870] Thermal sensor with ratio = 183
[ 16.345881] Anatop Thermal registered as thermal_zone0
[ 16.351169] anatop_thermal_probe: default cooling device is cpufreq!
[ 16.358317] usbcore: registered new interface driver usbhid
[ 16.363893] usbhid: USB HID core driver
[ 16.368144] usbcore: registered new interface driver snd-usb-audio
[ 16.374848] mxc_hdmi_soc mxc_hdmi_soc.0: MXC HDMI Audio
[ 16.380296] Cirrus Logic CS42888 ALSA SoC Codec Driver
[ 16.385539] i2c-core: driver [cs42888] using legacy suspend method
[ 16.387149] mmc0: new high speed SDHC card at address 0001
[ 16.397244] i2c-core: driver [cs42888] using legacy resume method
[ 16.403550] mmcblk0: mmc0:0001 00000 7.44 GiB
[ 16.404126] imx-hdmi-soc-dai imx-hdmi-soc-dai.0: Failed: Load HDMI-video first.
[ 16.404881] imx_3stack asoc driver
[ 16.405497] Initialize HDMI-audio failed. Load HDMI-video first!
[ 16.405505] ALSA device list:
[ 16.405510] No soundcards found.
[ 16.405716] NET: Registered protocol family 26
[ 16.406295] TCP cubic registered
[ 16.406303] NET: Registered protocol family 17
[ 16.406320] can: controller area network core (rev 20090105 abi 8)
[ 16.406391] NET: Registered protocol family 29
[ 16.406407] can: raw protocol (rev 20090105)
[ 16.406413] can: broadcast manager protocol (rev 20090105 t)
[ 16.425829] usb 2-1: new high speed USB device number 2 using fsl-ehci
[ 16.470303] Bluetooth: RFCOMM TTY layer initialized
[ 16.471595] mmcblk0: p1
[ 16.477735] Bluetooth: RFCOMM socket layer initialized
[ 16.482876] Bluetooth: RFCOMM ver 1.11
[ 16.486635] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 16.491949] Bluetooth: BNEP filters: protocol multicast
[ 16.497189] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
[ 16.503241] lib80211: common routines for IEEE802.11 drivers
[ 16.508958] VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
[ 16.516994] Bus freq driver module loaded
[ 16.521011] Bus freq driver Enabled
[ 16.526514] mxc_dvfs_core_probe
[ 16.529846] DVFS driver module loaded
[ 16.535886] snvs_rtc snvs_rtc.0: setting system clock to 1970-01-01 05:59:54 UTC (21594)
[ 16.549411] EXT3-fs: barriers not enabled
[ 16.554225] kjournald starting. Commit interval 5 seconds
[ 16.558984] EXT3-fs (mmcblk0p1): using internal journal
[ 16.558996] EXT3-fs (mmcblk0p1): mounted filesystem with writeback data mode
[ 16.559027] VFS: Mounted root (ext3 filesystem) on device 179:1.
[ 16.559086] Freeing init memory: 204K
[ 16.648921] hub 2-1:1.0: USB hub found
[ 16.652848] hub 2-1:1.0: 3 ports detected
starting pid 1354, tty '': '/etc/rc.d/rcS'
Mounting /proc and /sys
Starting the hotplug events dispatcher udevd
[ 16.886688] udevd (1372): /proc/1372/oom_adj is deprecated, please use /proc/1372/oom_score_adj instead.
Synthesizing initial hotplug events
Setting the hostname to boundary
Mounting filesystems
mount: mounting usbfs on /proc/bus/usb failed: No such file or directory
Running sysctl
Setting up networking on loopback device:
Setting up networking on eth0:
udhcpc (v1.20.2) started
[ 19.039687] eth0: Freescale FEC PHY driver [Micrel KSZ9021 Gigabit PHY] (mii_bus:phy_addr=1:06, irq=-1)
Sending discover...
Sending discover...
Sending discover...
No lease, forking to background
Starting the dropbear ssh server:
starting pid 3060, tty '': '/etc/rc.d/rc_gpu.S'
starting pid 3068, tty '': '/etc/rc.d/rc_mxc.S'
arm-none-linux-gnueabi-gcc (Freescale MAD -- Linaro 2011.07 -- Built at 2011/08/10 09:20) 4.6.2 20110630 (prerelease)
root filesystem built on Tue, 18 Jun 2013 12:28:53 -0700
Freescale Semiconductor, Inc.
boundary login:
U-Boot 2013.01-rc1-00120-g7c28db0 (Nov 12 2012 - 09:15:04)
CPU: Freescale i.MX6Q rev1.2 at 792 MHz
So the behaviour is that the board boots, and blocks at: "PCIe EP: waiting for link up..." and as soon as I switch on the PC, it goes on all the way to the login prompt.
At that stage, knowing that by default the IMX6q is at 125Mhz and that the CLK signal are not connected on the PCIe connector of the board, so it uses internal PLL, and that the standard for PCIe is 100Mhz. Is it sure that the link isr really UP ?
Obviously on the PC side, if I issue a "lspci" I don't see anything. :smileysad:
The thing is that according to the patch, it's supposed to set the VID/PID to "DEADBEAF" but when I look at the memory, I see the default VID/PID:
$ ./memtool -32 01FFC000 20
Reading 0x20 count starting at address 0x01FFC000
0x01FFC000: ABCD16C3 00100000 00000001 00000000
0x01FFC010: 0000000C 00000000 00000008 00000001
0x01FFC020: 00000000 00000000 00000000 00000000
0x01FFC030: 00000000 00000040 00000000 000001FF
0x01FFC040: DBC35001 00000000 00000000 00000000
0x01FFC050: 01807005 00000000 00000000 00000000
0x01FFC060: 00000000 00000000 00000000 00000000
0x01FFC070: 00020010 00008700 00102010 0001CC12
So I must be doing something wrong. any help would be welcome.
just for info, i even patched my sabrelite files like that:
====
arch/arm/mach-mx6/board-mx6q_sabrelite.c
+#define SABREAUTO_MAX7310_1_BASE_ADDR IMX_GPIO_NR(8, 0)
+#define SABREAUTO_PCIE_RST_B_REVB (SABREAUTO_MAX7310_1_BASE_ADDR + 2)
+static const struct imx_pcie_platform_data mx6_sabrelite_pcie_data __initconst = {
+ .pcie_pwr_en = -EINVAL,
+ .pcie_rst = SABREAUTO_PCIE_RST_B_REVB,
+ .pcie_wake_up = -EINVAL,
+ .pcie_dis = -EINVAL,
+#ifdef CONFIG_IMX_PCIE_EP_MODE_IN_EP_RC_SYS
+ .type_ep = 1,
+#else
+ .type_ep = 0,
+#endif
+};
static void __init mx6_sabrelite_board_init(void)
+ /* Add PCIe RC interface support */
+ imx6q_add_pcie(&mx6_sabrelite_pcie_data);
imx6q_add_perfmon(0);
imx6q_add_perfmon(1);
imx6q_add_perfmon(2);
}
regards
After checking the uplink register on a while loop, i realized that my device was in fact loosing the link up.
So i decided to make a new cable, where I respect the proximity of the TX/RX lines by putting the track right next to eachother, with a new type of connector
so on one side I come from the SABRE Lite J23 connector, to my little adapter, and that goes to a KZ-B21 ( http://www.bplus.com.tw/ExtenderBoard/KZ-B21.html )
I tested this one on several PC, and on one of them (just one) when I do a "lspci" i see my dead:beaf device as a RAM pcie card.
On the Sabrelite, the link stays UP (0x00000310) It looks like the cable was really an issue here.
I still can not read the PC's memmory.
I still don't know if the device is working on 100Mhz or 125Mhz and if I don't have a clock problem. What I know for sure is that on another PC, the link gets UP and Down non stop. So I still wonder if I don't have a clock issue.
maybe richard.zhu could tell us more about it ? What i know is that on some EP implementation, it activates the CLK1 of LVDS port in input. is it switching into external clock ?
As of aleksandrmuraviov could you tell me more about the board you are using ? (btw, to post a picture here, just drag and drop)
