Re: PCIe EPF

["Lad, Prabhakar" <prabhakar.csengg@xxxxxxxxx>]

HI Shimoda-san,

On Wed, Apr 1, 2020 at 9:50 AM Yoshihiro Shimoda
<yoshihiro.shimoda.uh@xxxxxxxxxxx> wrote:
>
> Hi Prabhakar-san,
>
> > From: Lad, Prabhakar, Sent: Wednesday, April 1, 2020 5:00 PM
> <snip>
> > > > root@hihope-rzg2m:~# pcitest -r -s 2176
> > > <snip>
> > > > [  528.556991] pci-endpoint-test 0000:01:00.0: pci_endpoint_test_read
> > > > ffff0004b61f9000 7e951000 910c690d=910c690d
> > >
> > > I'd like to know how to print these crc values. Your report on the case 1
> > > mentioned on pci-epf-test.c like below though.
> > >
> > > > +       dev_err(dev, "%s %llx %llx csum: %x = %x\n", __func__, reg->dst_addr,
> > > > +               phys_addr, reg->checksum, crc32_le(~0, dst_addr, reg->size));
> > >
> > > Also, as I mentioned on previous email, this is possible to cause timing issue.
> > > So, I'd like to where you added the hexdump on pci_endpoint_test.c.
> > > Perhaps, copy and pasting your whole debug diff is useful to understand about it.
> > >
> >
> > Following is the complete diff:
>
> Thanks!
>
> > diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
> > index 3c49514b4813..e7bf58a1fee8 100644
> > --- a/drivers/misc/pci_endpoint_test.c
> > +++ b/drivers/misc/pci_endpoint_test.c
> > @@ -561,6 +561,23 @@ static bool pci_endpoint_test_write(struct
> > pci_endpoint_test *test,
> >      return ret;
> >  }
> >
> > +static void print_buffer(struct device *dev, void *buff_addr, size_t size)
> > +{
> > +    size_t i;
> > +    u64 *addr = buff_addr;
> > +
> > +    for(i = 0; i < size; i += sizeof(addr))
> > +        dev_err(dev, "buf[%zu] : %llx\n", i, *addr);
> > +
> > +    for(i = 0; i < size; i +=1) {
> > +        if (0x910c690d == crc32_le(~0, buff_addr, i))
> > +            dev_err(dev, "%x\n",
> > +                crc32_le(~0, buff_addr, i));
> > +    }
> > +
> > +    dev_err(dev, "\n\n\n\n");
> > +}
> > +
> >  static bool pci_endpoint_test_read(struct pci_endpoint_test *test,
> >                     unsigned long arg)
> >  {
> > @@ -608,7 +625,7 @@ static bool pci_endpoint_test_read(struct
> > pci_endpoint_test *test,
> >      }
>
> I'd like to allocate temporary buffer here to copy data later...
>         void *tmp;
>         ...
>         tmp = kzalloc(size + alignment, GFP_KERNEL);
>
> >      orig_phys_addr = dma_map_single(dev, orig_addr, size + alignment,
> > -                    DMA_FROM_DEVICE);
> > +                    DMA_BIDIRECTIONAL);
> >      if (dma_mapping_error(dev, orig_phys_addr)) {
> >          dev_err(dev, "failed to map source buffer address\n");
> >          ret = false;
> > @@ -640,12 +657,17 @@ static bool pci_endpoint_test_read(struct
> > pci_endpoint_test *test,
> >      wait_for_completion(&test->irq_raised);
> >
> >      dma_unmap_single(dev, orig_phys_addr, size + alignment,
> > -             DMA_FROM_DEVICE);
> > +             DMA_BIDIRECTIONAL);
>
> And then, I'd like to copy addr buffer to the tmp here.
>         memcpy(tmp, addr, size);
>
> >      crc32 = crc32_le(~0, addr, size);
>
> And addr is replaced with tmp;
>
> >      if (crc32 == pci_endpoint_test_readl(test, PCI_ENDPOINT_TEST_CHECKSUM))
> >          ret = true;
> >
> > +    print_buffer(dev, addr, size);
>
> This addr is also replaced with tmp;
>
> > +    dev_err(dev, "%s %px %llx %x=%x\n", __func__, orig_addr,
> > +        orig_phys_addr, crc32,
> > +        pci_endpoint_test_readl(test, PCI_ENDPOINT_TEST_CHECKSUM));
>
> The crc32 value was calculated before print the buffer.
> This means that timing is difference between crc32_le(addr) and print_buffer(addr).
> So, I'd like to copy the addr buffer to tmp and use the tmp for crc32_le() and print_buffer().
>
Following is the diff of suggested changes:

diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c
index 3c49514b4813..b782134838d1 100644
--- a/drivers/misc/pci_endpoint_test.c
+++ b/drivers/misc/pci_endpoint_test.c
@@ -561,6 +561,23 @@ static bool pci_endpoint_test_write(struct
pci_endpoint_test *test,
     return ret;
 }

+static void print_buffer(struct device *dev, void *buff_addr, size_t size)
+{
+    size_t i;
+    u64 *addr = buff_addr;
+
+    for(i = 0; i < size; i += sizeof(addr))
+        dev_err(dev, "buf[%zu] : %llx\n", i, *addr);
+
+    for(i = 0; i < size; i +=1) {
+        if (0x910c690d == crc32_le(~0, buff_addr, i))
+            dev_err(dev, "%x\n",
+                crc32_le(~0, buff_addr, i));
+    }
+
+    dev_err(dev, "\n\n\n\n");
+}
+
 static bool pci_endpoint_test_read(struct pci_endpoint_test *test,
                    unsigned long arg)
 {
@@ -574,6 +591,7 @@ static bool pci_endpoint_test_read(struct
pci_endpoint_test *test,
     struct pci_dev *pdev = test->pdev;
     struct device *dev = &pdev->dev;
     void *orig_addr;
+    void *tmp_buffer;
     dma_addr_t orig_phys_addr;
     size_t offset;
     size_t alignment = test->alignment;
@@ -601,14 +619,19 @@ static bool pci_endpoint_test_read(struct
pci_endpoint_test *test,
     }

     orig_addr = kzalloc(size + alignment, GFP_KERNEL);
-    if (!orig_addr) {
+    tmp_buffer = kzalloc(size + alignment, GFP_KERNEL);
+    if (!orig_addr || !tmp_buffer) {
         dev_err(dev, "Failed to allocate destination address\n");
         ret = false;
+        if (orig_addr)
+            kfree(orig_addr);
+        if (tmp_buffer)
+            kfree(tmp_buffer);
         goto err;
     }

     orig_phys_addr = dma_map_single(dev, orig_addr, size + alignment,
-                    DMA_FROM_DEVICE);
+                    DMA_BIDIRECTIONAL);
     if (dma_mapping_error(dev, orig_phys_addr)) {
         dev_err(dev, "failed to map source buffer address\n");
         ret = false;
@@ -640,14 +663,24 @@ static bool pci_endpoint_test_read(struct
pci_endpoint_test *test,
     wait_for_completion(&test->irq_raised);

     dma_unmap_single(dev, orig_phys_addr, size + alignment,
-             DMA_FROM_DEVICE);
+             DMA_BIDIRECTIONAL);
+
+    memcpy(tmp_buffer, addr, size);

     crc32 = crc32_le(~0, addr, size);
     if (crc32 == pci_endpoint_test_readl(test, PCI_ENDPOINT_TEST_CHECKSUM))
         ret = true;

+    print_buffer(dev, addr, size);
+    print_buffer(dev, tmp_buffer, size);
+    dev_err(dev, "%s kzalloc:%px dma handle:%llx buffer CRC:%x BAR
CRC:%x tmp buffer crc: %x\n",
+        __func__, orig_addr, orig_phys_addr, crc32,
+        pci_endpoint_test_readl(test, PCI_ENDPOINT_TEST_CHECKSUM),
+        crc32_le(~0, tmp_buffer, size));
+
 err_phys_addr:
     kfree(orig_addr);
+    kfree(tmp_buffer);
 err:
     return ret;
 }

> > +
> >  err_phys_addr:
> >      kfree(orig_addr);
> >  err:
> >
> > Note: I have added DMA_BIDIRECTIONAL that is because I am also
> > printing the buffer on ep
> > and calulating the crc
> >
> > > > READ (   2176 bytes):           OKAY
> > > > root@hihope-rzg2m:~# pcitest -r -s 2176
> > > <snip>
> > > > [  533.457921] pci-endpoint-test 0000:01:00.0: pci_endpoint_test_read
> > > > ffff0004b61f9000 7e959800  ce535039=910c690d
> > > > READ (   2176 bytes):           NOT OKAY
> > > >
> > > > Note: for failure case the crc is always ce535039
> > >
> > > The value of ce535039 is from pci_endpoint_test_readl(test, PCI_ENDPOINT_TEST_CHECKSUM)?
> > > If so, it's strange because all 0xdf values with 2176 bytes should be 910c690d by crc32_le().
> > >
> > The value ce535039 is the one which is calculated from the buffer and
> > value 910c690d is the one
> > which is passed from the BAR memory which is correct.
>
> I got it. If my guess is correct, using the tmp buffer above can print
> the buffer with wrong value(s).
>
>
> By the way, your PCIe host environment (RZ/G2N) output the following log?
>
> [    0.000000] software IO TLB: mapped [mem 0x7bfff000-0x7ffff000] (64MB)
>
> If so, I guess this issue is related to this software IO TLB behavior.
> IIUC, if we use coherent buffer or GPF_DMA buffer, the kernel will not
> use software IO TLB for these buffers.
>

root@hihope-rzg2m:~# dmesg | grep TLB
[    0.000000] software IO TLB: mapped [mem 0x7bfff000-0x7ffff000] (64MB)
[    0.149808] HugeTLB registered 1.00 GiB page size, pre-allocated 0 pages
[    0.149825] HugeTLB registered 32.0 MiB page size, pre-allocated 0 pages
[    0.149834] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages
[    0.149843] HugeTLB registered 64.0 KiB page size, pre-allocated 0 pages
root@hihope-rzg2m:~#
root@hihope-rzg2m:~#
root@hihope-rzg2m:~#
root@hihope-rzg2m:~#
root@hihope-rzg2m:~# pcitest -i1
SET IRQ TYPE TO MSI:            OKAY
root@hihope-rzg2m:~#
root@hihope-rzg2m:~#
root@hihope-rzg2m:~# cat read.sh
pcitest -i 1
while [ 1 ]; do pcitest -r -s 2176; done
root@hihope-rzg2m:~# pcitest -r -s 2176
[   77.863719] pci-endpoint-test 0000:01:00.0: buf[0] : dfdfdfdfdfdfdfdf
[   77.870299] pci-endpoint-test 0000:01:00.0: buf[8] : dfdfdfdfdfdfdfdf
[   77.876800] pci-endpoint-test 0000:01:00.0: buf[16] : dfdfdfdfdfdfdfdf
[   77.883563] pci-endpoint-test 0000:01:00.0: buf[24] : dfdfdfdfdfdfdfdf
[   77.890241] pci-endpoint-test 0000:01:00.0: buf[32] : dfdfdfdfdfdfdfdf
[   77.896837] pci-endpoint-test 0000:01:00.0: buf[40] : dfdfdfdfdfdfdfdf
[   77.903406] pci-endpoint-test 0000:01:00.0: buf[48] : dfdfdfdfdfdfdfdf
[   77.909971] pci-endpoint-test 0000:01:00.0: buf[56] : dfdfdfdfdfdfdfdf
[   77.916534] pci-endpoint-test 0000:01:00.0: buf[64] : dfdfdfdfdfdfdfdf
[   77.923110] pci-endpoint-test 0000:01:00.0: buf[72] : dfdfdfdfdfdfdfdf
[   77.929672] pci-endpoint-test 0000:01:00.0: buf[80] : dfdfdfdfdfdfdfdf
[   77.936242] pci-endpoint-test 0000:01:00.0: buf[88] : dfdfdfdfdfdfdfdf
[   77.942808] pci-endpoint-test 0000:01:00.0: buf[96] : dfdfdfdfdfdfdfdf
[   77.949374] pci-endpoint-test 0000:01:00.0: buf[104] : dfdfdfdfdfdfdfdf
[   77.956023] pci-endpoint-test 0000:01:00.0: buf[112] : dfdfdfdfdfdfdfdf
[   77.962675] pci-endpoint-test 0000:01:00.0: buf[120] : dfdfdfdfdfdfdfdf
[   77.969323] pci-endpoint-test 0000:01:00.0: buf[128] : dfdfdfdfdfdfdfdf
[   77.975977] pci-endpoint-test 0000:01:00.0: buf[136] : dfdfdfdfdfdfdfdf
[   77.982626] pci-endpoint-test 0000:01:00.0: buf[144] : dfdfdfdfdfdfdfdf
[   77.989281] pci-endpoint-test 0000:01:00.0: buf[152] : dfdfdfdfdfdfdfdf
[   77.995944] pci-endpoint-test 0000:01:00.0: buf[160] : dfdfdfdfdfdfdfdf
[   78.002602] pci-endpoint-test 0000:01:00.0: buf[168] : dfdfdfdfdfdfdfdf
[   78.009253] pci-endpoint-test 0000:01:00.0: buf[176] : dfdfdfdfdfdfdfdf
[   78.015905] pci-endpoint-test 0000:01:00.0: buf[184] : dfdfdfdfdfdfdfdf
[   78.022563] pci-endpoint-test 0000:01:00.0: buf[192] : dfdfdfdfdfdfdfdf
[   78.029214] pci-endpoint-test 0000:01:00.0: buf[200] : dfdfdfdfdfdfdfdf
[   78.035863] pci-endpoint-test 0000:01:00.0: buf[208] : dfdfdfdfdfdfdfdf
[   78.042515] pci-endpoint-test 0000:01:00.0: buf[216] : dfdfdfdfdfdfdfdf
[   78.049165] pci-endpoint-test 0000:01:00.0: buf[224] : dfdfdfdfdfdfdfdf
[   78.055818] pci-endpoint-test 0000:01:00.0: buf[232] : dfdfdfdfdfdfdfdf
[   78.062466] pci-endpoint-test 0000:01:00.0: buf[240] : dfdfdfdfdfdfdfdf
[   78.069116] pci-endpoint-test 0000:01:00.0: buf[248] : dfdfdfdfdfdfdfdf
[   78.075768] pci-endpoint-test 0000:01:00.0: buf[256] : dfdfdfdfdfdfdfdf
[   78.082418] pci-endpoint-test 0000:01:00.0: buf[264] : dfdfdfdfdfdfdfdf
[   78.089066] pci-endpoint-test 0000:01:00.0: buf[272] : dfdfdfdfdfdfdfdf
[   78.095720] pci-endpoint-test 0000:01:00.0: buf[280] : dfdfdfdfdfdfdfdf
[   78.102371] pci-endpoint-test 0000:01:00.0: buf[288] : dfdfdfdfdfdfdfdf
[   78.109025] pci-endpoint-test 0000:01:00.0: buf[296] : dfdfdfdfdfdfdfdf
[   78.115686] pci-endpoint-test 0000:01:00.0: buf[304] : dfdfdfdfdfdfdfdf
[   78.122356] pci-endpoint-test 0000:01:00.0: buf[312] : dfdfdfdfdfdfdfdf
[   78.129003] pci-endpoint-test 0000:01:00.0: buf[320] : dfdfdfdfdfdfdfdf
[   78.135658] pci-endpoint-test 0000:01:00.0: buf[328] : dfdfdfdfdfdfdfdf
[   78.142306] pci-endpoint-test 0000:01:00.0: buf[336] : dfdfdfdfdfdfdfdf
[   78.148958] pci-endpoint-test 0000:01:00.0: buf[344] : dfdfdfdfdfdfdfdf
[   78.155607] pci-endpoint-test 0000:01:00.0: buf[352] : dfdfdfdfdfdfdfdf
[   78.162257] pci-endpoint-test 0000:01:00.0: buf[360] : dfdfdfdfdfdfdfdf
[   78.168905] pci-endpoint-test 0000:01:00.0: buf[368] : dfdfdfdfdfdfdfdf
[   78.175554] pci-endpoint-test 0000:01:00.0: buf[376] : dfdfdfdfdfdfdfdf
[   78.182204] pci-endpoint-test 0000:01:00.0: buf[384] : dfdfdfdfdfdfdfdf
[   78.188854] pci-endpoint-test 0000:01:00.0: buf[392] : dfdfdfdfdfdfdfdf
[   78.195504] pci-endpoint-test 0000:01:00.0: buf[400] : dfdfdfdfdfdfdfdf
[   78.202154] pci-endpoint-test 0000:01:00.0: buf[408] : dfdfdfdfdfdfdfdf
[   78.208804] pci-endpoint-test 0000:01:00.0: buf[416] : dfdfdfdfdfdfdfdf
[   78.215457] pci-endpoint-test 0000:01:00.0: buf[424] : dfdfdfdfdfdfdfdf
[   78.222113] pci-endpoint-test 0000:01:00.0: buf[432] : dfdfdfdfdfdfdfdf
[   78.228769] pci-endpoint-test 0000:01:00.0: buf[440] : dfdfdfdfdfdfdfdf
[   78.235428] pci-endpoint-test 0000:01:00.0: buf[448] : dfdfdfdfdfdfdfdf
[   78.242089] pci-endpoint-test 0000:01:00.0: buf[456] : dfdfdfdfdfdfdfdf
[   78.248741] pci-endpoint-test 0000:01:00.0: buf[464] : dfdfdfdfdfdfdfdf
[   78.255394] pci-endpoint-test 0000:01:00.0: buf[472] : dfdfdfdfdfdfdfdf
[   78.262042] pci-endpoint-test 0000:01:00.0: buf[480] : dfdfdfdfdfdfdfdf
[   78.268692] pci-endpoint-test 0000:01:00.0: buf[488] : dfdfdfdfdfdfdfdf
[   78.275342] pci-endpoint-test 0000:01:00.0: buf[496] : dfdfdfdfdfdfdfdf
[   78.281992] pci-endpoint-test 0000:01:00.0: buf[504] : dfdfdfdfdfdfdfdf
[   78.288639] pci-endpoint-test 0000:01:00.0: buf[512] : dfdfdfdfdfdfdfdf
[   78.295291] pci-endpoint-test 0000:01:00.0: buf[520] : dfdfdfdfdfdfdfdf
[   78.301939] pci-endpoint-test 0000:01:00.0: buf[528] : dfdfdfdfdfdfdfdf
[   78.308587] pci-endpoint-test 0000:01:00.0: buf[536] : dfdfdfdfdfdfdfdf
[   78.315234] pci-endpoint-test 0000:01:00.0: buf[544] : dfdfdfdfdfdfdfdf
[   78.321895] pci-endpoint-test 0000:01:00.0: buf[552] : dfdfdfdfdfdfdfdf
[   78.328545] pci-endpoint-test 0000:01:00.0: buf[560] : dfdfdfdfdfdfdfdf
[   78.335195] pci-endpoint-test 0000:01:00.0: buf[568] : dfdfdfdfdfdfdfdf
[   78.341843] pci-endpoint-test 0000:01:00.0: buf[576] : dfdfdfdfdfdfdfdf
[   78.348496] pci-endpoint-test 0000:01:00.0: buf[584] : dfdfdfdfdfdfdfdf
[   78.355156] pci-endpoint-test 0000:01:00.0: buf[592] : dfdfdfdfdfdfdfdf
[   78.361815] pci-endpoint-test 0000:01:00.0: buf[600] : dfdfdfdfdfdfdfdf
[   78.368462] pci-endpoint-test 0000:01:00.0: buf[608] : dfdfdfdfdfdfdfdf
[   78.375117] pci-endpoint-test 0000:01:00.0: buf[616] : dfdfdfdfdfdfdfdf
[   78.381764] pci-endpoint-test 0000:01:00.0: buf[624] : dfdfdfdfdfdfdfdf
[   78.388416] pci-endpoint-test 0000:01:00.0: buf[632] : dfdfdfdfdfdfdfdf
[   78.395063] pci-endpoint-test 0000:01:00.0: buf[640] : dfdfdfdfdfdfdfdf
[   78.401717] pci-endpoint-test 0000:01:00.0: buf[648] : dfdfdfdfdfdfdfdf
[   78.408366] pci-endpoint-test 0000:01:00.0: buf[656] : dfdfdfdfdfdfdfdf
[   78.415023] pci-endpoint-test 0000:01:00.0: buf[664] : dfdfdfdfdfdfdfdf
[   78.421677] pci-endpoint-test 0000:01:00.0: buf[672] : dfdfdfdfdfdfdfdf
[   78.428329] pci-endpoint-test 0000:01:00.0: buf[680] : dfdfdfdfdfdfdfdf
[   78.434977] pci-endpoint-test 0000:01:00.0: buf[688] : dfdfdfdfdfdfdfdf
[   78.441630] pci-endpoint-test 0000:01:00.0: buf[696] : dfdfdfdfdfdfdfdf
[   78.448279] pci-endpoint-test 0000:01:00.0: buf[704] : dfdfdfdfdfdfdfdf
[   78.454929] pci-endpoint-test 0000:01:00.0: buf[712] : dfdfdfdfdfdfdfdf
[   78.461578] pci-endpoint-test 0000:01:00.0: buf[720] : dfdfdfdfdfdfdfdf
[   78.468231] pci-endpoint-test 0000:01:00.0: buf[728] : dfdfdfdfdfdfdfdf
[   78.474890] pci-endpoint-test 0000:01:00.0: buf[736] : dfdfdfdfdfdfdfdf
[   78.481548] pci-endpoint-test 0000:01:00.0: buf[744] : dfdfdfdfdfdfdfdf
[   78.488199] pci-endpoint-test 0000:01:00.0: buf[752] : dfdfdfdfdfdfdfdf
[   78.494852] pci-endpoint-test 0000:01:00.0: buf[760] : dfdfdfdfdfdfdfdf
[   78.501500] pci-endpoint-test 0000:01:00.0: buf[768] : dfdfdfdfdfdfdfdf
[   78.508150] pci-endpoint-test 0000:01:00.0: buf[776] : dfdfdfdfdfdfdfdf
[   78.514797] pci-endpoint-test 0000:01:00.0: buf[784] : dfdfdfdfdfdfdfdf
[   78.521470] pci-endpoint-test 0000:01:00.0: buf[792] : dfdfdfdfdfdfdfdf
[   78.528122] pci-endpoint-test 0000:01:00.0: buf[800] : dfdfdfdfdfdfdfdf
[   78.534774] pci-endpoint-test 0000:01:00.0: buf[808] : dfdfdfdfdfdfdfdf
[   78.541423] pci-endpoint-test 0000:01:00.0: buf[816] : dfdfdfdfdfdfdfdf
[   78.548070] pci-endpoint-test 0000:01:00.0: buf[824] : dfdfdfdfdfdfdfdf
[   78.554720] pci-endpoint-test 0000:01:00.0: buf[832] : dfdfdfdfdfdfdfdf
[   78.561367] pci-endpoint-test 0000:01:00.0: buf[840] : dfdfdfdfdfdfdfdf
[   78.568017] pci-endpoint-test 0000:01:00.0: buf[848] : dfdfdfdfdfdfdfdf
[   78.574667] pci-endpoint-test 0000:01:00.0: buf[856] : dfdfdfdfdfdfdfdf
[   78.581317] pci-endpoint-test 0000:01:00.0: buf[864] : dfdfdfdfdfdfdfdf
[   78.587964] pci-endpoint-test 0000:01:00.0: buf[872] : dfdfdfdfdfdfdfdf
[   78.594623] pci-endpoint-test 0000:01:00.0: buf[880] : dfdfdfdfdfdfdfdf
[   78.601286] pci-endpoint-test 0000:01:00.0: buf[888] : dfdfdfdfdfdfdfdf
[   78.607946] pci-endpoint-test 0000:01:00.0: buf[896] : dfdfdfdfdfdfdfdf
[   78.614596] pci-endpoint-test 0000:01:00.0: buf[904] : dfdfdfdfdfdfdfdf
[   78.621246] pci-endpoint-test 0000:01:00.0: buf[912] : dfdfdfdfdfdfdfdf
[   78.627902] pci-endpoint-test 0000:01:00.0: buf[920] : dfdfdfdfdfdfdfdf
[   78.634553] pci-endpoint-test 0000:01:00.0: buf[928] : dfdfdfdfdfdfdfdf
[   78.641203] pci-endpoint-test 0000:01:00.0: buf[936] : dfdfdfdfdfdfdfdf
[   78.647852] pci-endpoint-test 0000:01:00.0: buf[944] : dfdfdfdfdfdfdfdf
[   78.654499] pci-endpoint-test 0000:01:00.0: buf[952] : dfdfdfdfdfdfdfdf
[   78.661148] pci-endpoint-test 0000:01:00.0: buf[960] : dfdfdfdfdfdfdfdf
[   78.667794] pci-endpoint-test 0000:01:00.0: buf[968] : dfdfdfdfdfdfdfdf
[   78.674445] pci-endpoint-test 0000:01:00.0: buf[976] : dfdfdfdfdfdfdfdf
[   78.681094] pci-endpoint-test 0000:01:00.0: buf[984] : dfdfdfdfdfdfdfdf
[   78.687746] pci-endpoint-test 0000:01:00.0: buf[992] : dfdfdfdfdfdfdfdf
[   78.694395] pci-endpoint-test 0000:01:00.0: buf[1000] : dfdfdfdfdfdfdfdf
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[   80.152319] pci-endpoint-test 0000:01:00.0: buf[552] : dfdfdfdfdfdfdfdf
[   80.158968] pci-endpoint-test 0000:01:00.0: buf[560] : dfdfdfdfdfdfdfdf
[   80.165616] pci-endpoint-test 0000:01:00.0: buf[568] : dfdfdfdfdfdfdfdf
[   80.172265] pci-endpoint-test 0000:01:00.0: buf[576] : dfdfdfdfdfdfdfdf
[   80.178915] pci-endpoint-test 0000:01:00.0: buf[584] : dfdfdfdfdfdfdfdf
[   80.185564] pci-endpoint-test 0000:01:00.0: buf[592] : dfdfdfdfdfdfdfdf
[   80.192212] pci-endpoint-test 0000:01:00.0: buf[600] : dfdfdfdfdfdfdfdf
[   80.198862] pci-endpoint-test 0000:01:00.0: buf[608] : dfdfdfdfdfdfdfdf
[   80.205512] pci-endpoint-test 0000:01:00.0: buf[616] : dfdfdfdfdfdfdfdf
[   80.212179] pci-endpoint-test 0000:01:00.0: buf[624] : dfdfdfdfdfdfdfdf
[   80.218839] pci-endpoint-test 0000:01:00.0: buf[632] : dfdfdfdfdfdfdfdf
[   80.225493] pci-endpoint-test 0000:01:00.0: buf[640] : dfdfdfdfdfdfdfdf
[   80.232144] pci-endpoint-test 0000:01:00.0: buf[648] : dfdfdfdfdfdfdfdf
[   80.238801] pci-endpoint-test 0000:01:00.0: buf[656] : dfdfdfdfdfdfdfdf
[   80.245463] pci-endpoint-test 0000:01:00.0: buf[664] : dfdfdfdfdfdfdfdf
[   80.252113] pci-endpoint-test 0000:01:00.0: buf[672] : dfdfdfdfdfdfdfdf
[   80.258759] pci-endpoint-test 0000:01:00.0: buf[680] : dfdfdfdfdfdfdfdf
[   80.265411] pci-endpoint-test 0000:01:00.0: buf[688] : dfdfdfdfdfdfdfdf
[   80.272060] pci-endpoint-test 0000:01:00.0: buf[696] : dfdfdfdfdfdfdfdf
[   80.278710] pci-endpoint-test 0000:01:00.0: buf[704] : dfdfdfdfdfdfdfdf
[   80.285359] pci-endpoint-test 0000:01:00.0: buf[712] : dfdfdfdfdfdfdfdf
[   80.292010] pci-endpoint-test 0000:01:00.0: buf[720] : dfdfdfdfdfdfdfdf
[   80.298659] pci-endpoint-test 0000:01:00.0: buf[728] : dfdfdfdfdfdfdfdf
[   80.305308] pci-endpoint-test 0000:01:00.0: buf[736] : dfdfdfdfdfdfdfdf
[   80.311958] pci-endpoint-test 0000:01:00.0: buf[744] : dfdfdfdfdfdfdfdf
[   80.318606] pci-endpoint-test 0000:01:00.0: buf[752] : dfdfdfdfdfdfdfdf
[   80.325257] pci-endpoint-test 0000:01:00.0: buf[760] : dfdfdfdfdfdfdfdf
[   80.331919] pci-endpoint-test 0000:01:00.0: buf[768] : dfdfdfdfdfdfdfdf
[   80.338586] pci-endpoint-test 0000:01:00.0: buf[776] : dfdfdfdfdfdfdfdf
[   80.345241] pci-endpoint-test 0000:01:00.0: buf[784] : dfdfdfdfdfdfdfdf
[   80.351890] pci-endpoint-test 0000:01:00.0: buf[792] : dfdfdfdfdfdfdfdf
[   80.358541] pci-endpoint-test 0000:01:00.0: buf[800] : dfdfdfdfdfdfdfdf
[   80.365189] pci-endpoint-test 0000:01:00.0: buf[808] : dfdfdfdfdfdfdfdf
[   80.371838] pci-endpoint-test 0000:01:00.0: buf[816] : dfdfdfdfdfdfdfdf
[   80.378489] pci-endpoint-test 0000:01:00.0: buf[824] : dfdfdfdfdfdfdfdf
[   80.385138] pci-endpoint-test 0000:01:00.0: buf[832] : dfdfdfdfdfdfdfdf
[   80.391788] pci-endpoint-test 0000:01:00.0: buf[840] : dfdfdfdfdfdfdfdf
[   80.398439] pci-endpoint-test 0000:01:00.0: buf[848] : dfdfdfdfdfdfdfdf
[   80.405087] pci-endpoint-test 0000:01:00.0: buf[856] : dfdfdfdfdfdfdfdf
[   80.411737] pci-endpoint-test 0000:01:00.0: buf[864] : dfdfdfdfdfdfdfdf
[   80.418388] pci-endpoint-test 0000:01:00.0: buf[872] : dfdfdfdfdfdfdfdf
[   80.425039] pci-endpoint-test 0000:01:00.0: buf[880] : dfdfdfdfdfdfdfdf
[   80.431688] pci-endpoint-test 0000:01:00.0: buf[888] : dfdfdfdfdfdfdfdf
[   80.438346] pci-endpoint-test 0000:01:00.0: buf[896] : dfdfdfdfdfdfdfdf
[   80.444997] pci-endpoint-test 0000:01:00.0: buf[904] : dfdfdfdfdfdfdfdf
[   80.451661] pci-endpoint-test 0000:01:00.0: buf[912] : dfdfdfdfdfdfdfdf
[   80.458321] pci-endpoint-test 0000:01:00.0: buf[920] : dfdfdfdfdfdfdfdf
[   80.464972] pci-endpoint-test 0000:01:00.0: buf[928] : dfdfdfdfdfdfdfdf
[   80.471620] pci-endpoint-test 0000:01:00.0: buf[936] : dfdfdfdfdfdfdfdf
[   80.478267] pci-endpoint-test 0000:01:00.0: buf[944] : dfdfdfdfdfdfdfdf
[   80.484918] pci-endpoint-test 0000:01:00.0: buf[952] : dfdfdfdfdfdfdfdf
[   80.491567] pci-endpoint-test 0000:01:00.0: buf[960] : dfdfdfdfdfdfdfdf
[   80.498215] pci-endpoint-test 0000:01:00.0: buf[968] : dfdfdfdfdfdfdfdf
[   80.504863] pci-endpoint-test 0000:01:00.0: buf[976] : dfdfdfdfdfdfdfdf
[   80.511510] pci-endpoint-test 0000:01:00.0: buf[984] : dfdfdfdfdfdfdfdf
[   80.518160] pci-endpoint-test 0000:01:00.0: buf[992] : dfdfdfdfdfdfdfdf
[   80.524807] pci-endpoint-test 0000:01:00.0: buf[1000] : dfdfdfdfdfdfdfdf
[   80.531550] pci-endpoint-test 0000:01:00.0: buf[1008] : dfdfdfdfdfdfdfdf
[   80.538291] pci-endpoint-test 0000:01:00.0: buf[1016] : dfdfdfdfdfdfdfdf
[   80.545028] pci-endpoint-test 0000:01:00.0: buf[1024] : dfdfdfdfdfdfdfdf
[   80.551765] pci-endpoint-test 0000:01:00.0: buf[1032] : dfdfdfdfdfdfdfdf
[   80.558503] pci-endpoint-test 0000:01:00.0: buf[1040] : dfdfdfdfdfdfdfdf
[   80.565243] pci-endpoint-test 0000:01:00.0: buf[1048] : dfdfdfdfdfdfdfdf
[   80.571995] pci-endpoint-test 0000:01:00.0: buf[1056] : dfdfdfdfdfdfdfdf
[   80.578742] pci-endpoint-test 0000:01:00.0: buf[1064] : dfdfdfdfdfdfdfdf
[   80.585493] pci-endpoint-test 0000:01:00.0: buf[1072] : dfdfdfdfdfdfdfdf
[   80.592230] pci-endpoint-test 0000:01:00.0: buf[1080] : dfdfdfdfdfdfdfdf
[   80.598968] pci-endpoint-test 0000:01:00.0: buf[1088] : dfdfdfdfdfdfdfdf
[   80.605704] pci-endpoint-test 0000:01:00.0: buf[1096] : dfdfdfdfdfdfdfdf
[   80.612441] pci-endpoint-test 0000:01:00.0: buf[1104] : dfdfdfdfdfdfdfdf
[   80.619177] pci-endpoint-test 0000:01:00.0: buf[1112] : dfdfdfdfdfdfdfdf
[   80.625912] pci-endpoint-test 0000:01:00.0: buf[1120] : dfdfdfdfdfdfdfdf
[   80.632648] pci-endpoint-test 0000:01:00.0: buf[1128] : dfdfdfdfdfdfdfdf
[   80.639394] pci-endpoint-test 0000:01:00.0: buf[1136] : dfdfdfdfdfdfdfdf
[   80.646129] pci-endpoint-test 0000:01:00.0: buf[1144] : dfdfdfdfdfdfdfdf
[   80.652864] pci-endpoint-test 0000:01:00.0: buf[1152] : dfdfdfdfdfdfdfdf
[   80.659599] pci-endpoint-test 0000:01:00.0: buf[1160] : dfdfdfdfdfdfdfdf
[   80.666336] pci-endpoint-test 0000:01:00.0: buf[1168] : dfdfdfdfdfdfdfdf
[   80.673070] pci-endpoint-test 0000:01:00.0: buf[1176] : dfdfdfdfdfdfdfdf
[   80.679806] pci-endpoint-test 0000:01:00.0: buf[1184] : dfdfdfdfdfdfdfdf
[   80.686544] pci-endpoint-test 0000:01:00.0: buf[1192] : dfdfdfdfdfdfdfdf
[   80.693297] pci-endpoint-test 0000:01:00.0: buf[1200] : dfdfdfdfdfdfdfdf
[   80.700044] pci-endpoint-test 0000:01:00.0: buf[1208] : dfdfdfdfdfdfdfdf
[   80.706783] pci-endpoint-test 0000:01:00.0: buf[1216] : dfdfdfdfdfdfdfdf
[   80.713519] pci-endpoint-test 0000:01:00.0: buf[1224] : dfdfdfdfdfdfdfdf
[   80.720255] pci-endpoint-test 0000:01:00.0: buf[1232] : dfdfdfdfdfdfdfdf
[   80.726994] pci-endpoint-test 0000:01:00.0: buf[1240] : dfdfdfdfdfdfdfdf
[   80.733728] pci-endpoint-test 0000:01:00.0: buf[1248] : dfdfdfdfdfdfdfdf
[   80.740468] pci-endpoint-test 0000:01:00.0: buf[1256] : dfdfdfdfdfdfdfdf
[   80.747206] pci-endpoint-test 0000:01:00.0: buf[1264] : dfdfdfdfdfdfdfdf
[   80.753941] pci-endpoint-test 0000:01:00.0: buf[1272] : dfdfdfdfdfdfdfdf
[   80.760677] pci-endpoint-test 0000:01:00.0: buf[1280] : dfdfdfdfdfdfdfdf
[   80.767415] pci-endpoint-test 0000:01:00.0: buf[1288] : dfdfdfdfdfdfdfdf
[   80.774151] pci-endpoint-test 0000:01:00.0: buf[1296] : dfdfdfdfdfdfdfdf
[   80.780883] pci-endpoint-test 0000:01:00.0: buf[1304] : dfdfdfdfdfdfdfdf
[   80.787624] pci-endpoint-test 0000:01:00.0: buf[1312] : dfdfdfdfdfdfdfdf
[   80.794358] pci-endpoint-test 0000:01:00.0: buf[1320] : dfdfdfdfdfdfdfdf
[   80.801103] pci-endpoint-test 0000:01:00.0: buf[1328] : dfdfdfdfdfdfdfdf
[   80.807851] pci-endpoint-test 0000:01:00.0: buf[1336] : dfdfdfdfdfdfdfdf
[   80.814600] pci-endpoint-test 0000:01:00.0: buf[1344] : dfdfdfdfdfdfdfdf
[   80.821339] pci-endpoint-test 0000:01:00.0: buf[1352] : dfdfdfdfdfdfdfdf
[   80.828079] pci-endpoint-test 0000:01:00.0: buf[1360] : dfdfdfdfdfdfdfdf
[   80.834870] pci-endpoint-test 0000:01:00.0: buf[1368] : dfdfdfdfdfdfdfdf
[   80.841635] pci-endpoint-test 0000:01:00.0: buf[1376] : dfdfdfdfdfdfdfdf
[   80.848386] pci-endpoint-test 0000:01:00.0: buf[1384] : dfdfdfdfdfdfdfdf
[   80.855127] pci-endpoint-test 0000:01:00.0: buf[1392] : dfdfdfdfdfdfdfdf
[   80.861864] pci-endpoint-test 0000:01:00.0: buf[1400] : dfdfdfdfdfdfdfdf
[   80.868603] pci-endpoint-test 0000:01:00.0: buf[1408] : dfdfdfdfdfdfdfdf
[   80.875337] pci-endpoint-test 0000:01:00.0: buf[1416] : dfdfdfdfdfdfdfdf
[   80.882075] pci-endpoint-test 0000:01:00.0: buf[1424] : dfdfdfdfdfdfdfdf
[   80.888810] pci-endpoint-test 0000:01:00.0: buf[1432] : dfdfdfdfdfdfdfdf
[   80.895549] pci-endpoint-test 0000:01:00.0: buf[1440] : dfdfdfdfdfdfdfdf
[   80.902290] pci-endpoint-test 0000:01:00.0: buf[1448] : dfdfdfdfdfdfdfdf
[   80.909029] pci-endpoint-test 0000:01:00.0: buf[1456] : dfdfdfdfdfdfdfdf
[   80.915765] pci-endpoint-test 0000:01:00.0: buf[1464] : dfdfdfdfdfdfdfdf
[   80.922501] pci-endpoint-test 0000:01:00.0: buf[1472] : dfdfdfdfdfdfdfdf
[   80.929238] pci-endpoint-test 0000:01:00.0: buf[1480] : dfdfdfdfdfdfdfdf
[   80.935974] pci-endpoint-test 0000:01:00.0: buf[1488] : dfdfdfdfdfdfdfdf
[   80.942716] pci-endpoint-test 0000:01:00.0: buf[1496] : dfdfdfdfdfdfdfdf
[   80.949466] pci-endpoint-test 0000:01:00.0: buf[1504] : dfdfdfdfdfdfdfdf
[   80.956203] pci-endpoint-test 0000:01:00.0: buf[1512] : dfdfdfdfdfdfdfdf
[   80.962953] pci-endpoint-test 0000:01:00.0: buf[1520] : dfdfdfdfdfdfdfdf
[   80.969694] pci-endpoint-test 0000:01:00.0: buf[1528] : dfdfdfdfdfdfdfdf
[   80.976431] pci-endpoint-test 0000:01:00.0: buf[1536] : dfdfdfdfdfdfdfdf
[   80.983166] pci-endpoint-test 0000:01:00.0: buf[1544] : dfdfdfdfdfdfdfdf
[   80.989903] pci-endpoint-test 0000:01:00.0: buf[1552] : dfdfdfdfdfdfdfdf
[   80.996638] pci-endpoint-test 0000:01:00.0: buf[1560] : dfdfdfdfdfdfdfdf
[   81.003373] pci-endpoint-test 0000:01:00.0: buf[1568] : dfdfdfdfdfdfdfdf
[   81.010107] pci-endpoint-test 0000:01:00.0: buf[1576] : dfdfdfdfdfdfdfdf
[   81.016846] pci-endpoint-test 0000:01:00.0: buf[1584] : dfdfdfdfdfdfdfdf
[   81.023582] pci-endpoint-test 0000:01:00.0: buf[1592] : dfdfdfdfdfdfdfdf
[   81.030318] pci-endpoint-test 0000:01:00.0: buf[1600] : dfdfdfdfdfdfdfdf
[   81.037054] pci-endpoint-test 0000:01:00.0: buf[1608] : dfdfdfdfdfdfdfdf
[   81.043799] pci-endpoint-test 0000:01:00.0: buf[1616] : dfdfdfdfdfdfdfdf
[   81.050534] pci-endpoint-test 0000:01:00.0: buf[1624] : dfdfdfdfdfdfdfdf
[   81.057270] pci-endpoint-test 0000:01:00.0: buf[1632] : dfdfdfdfdfdfdfdf
[   81.064003] pci-endpoint-test 0000:01:00.0: buf[1640] : dfdfdfdfdfdfdfdf
[   81.070744] pci-endpoint-test 0000:01:00.0: buf[1648] : dfdfdfdfdfdfdfdf
[   81.077483] pci-endpoint-test 0000:01:00.0: buf[1656] : dfdfdfdfdfdfdfdf
[   81.084239] pci-endpoint-test 0000:01:00.0: buf[1664] : dfdfdfdfdfdfdfdf
[   81.090985] pci-endpoint-test 0000:01:00.0: buf[1672] : dfdfdfdfdfdfdfdf
[   81.097722] pci-endpoint-test 0000:01:00.0: buf[1680] : dfdfdfdfdfdfdfdf
[   81.104459] pci-endpoint-test 0000:01:00.0: buf[1688] : dfdfdfdfdfdfdfdf
[   81.111195] pci-endpoint-test 0000:01:00.0: buf[1696] : dfdfdfdfdfdfdfdf
[   81.117930] pci-endpoint-test 0000:01:00.0: buf[1704] : dfdfdfdfdfdfdfdf
[   81.124667] pci-endpoint-test 0000:01:00.0: buf[1712] : dfdfdfdfdfdfdfdf
[   81.131403] pci-endpoint-test 0000:01:00.0: buf[1720] : dfdfdfdfdfdfdfdf
[   81.138138] pci-endpoint-test 0000:01:00.0: buf[1728] : dfdfdfdfdfdfdfdf
[   81.144878] pci-endpoint-test 0000:01:00.0: buf[1736] : dfdfdfdfdfdfdfdf
[   81.151616] pci-endpoint-test 0000:01:00.0: buf[1744] : dfdfdfdfdfdfdfdf
[   81.158352] pci-endpoint-test 0000:01:00.0: buf[1752] : dfdfdfdfdfdfdfdf
[   81.165087] pci-endpoint-test 0000:01:00.0: buf[1760] : dfdfdfdfdfdfdfdf
[   81.171824] pci-endpoint-test 0000:01:00.0: buf[1768] : dfdfdfdfdfdfdfdf
[   81.178560] pci-endpoint-test 0000:01:00.0: buf[1776] : dfdfdfdfdfdfdfdf
[   81.185293] pci-endpoint-test 0000:01:00.0: buf[1784] : dfdfdfdfdfdfdfdf
[   81.192033] pci-endpoint-test 0000:01:00.0: buf[1792] : dfdfdfdfdfdfdfdf
[   81.198770] pci-endpoint-test 0000:01:00.0: buf[1800] : dfdfdfdfdfdfdfdf
[   81.205522] pci-endpoint-test 0000:01:00.0: buf[1808] : dfdfdfdfdfdfdfdf
[   81.212272] pci-endpoint-test 0000:01:00.0: buf[1816] : dfdfdfdfdfdfdfdf
[   81.219015] pci-endpoint-test 0000:01:00.0: buf[1824] : dfdfdfdfdfdfdfdf
[   81.226317] pci-endpoint-test 0000:01:00.0: buf[1832] : dfdfdfdfdfdfdfdf
[   81.233133] pci-endpoint-test 0000:01:00.0: buf[1840] : dfdfdfdfdfdfdfdf
[   81.239882] pci-endpoint-test 0000:01:00.0: buf[1848] : dfdfdfdfdfdfdfdf
[   81.246644] pci-endpoint-test 0000:01:00.0: buf[1856] : dfdfdfdfdfdfdfdf
[   81.253382] pci-endpoint-test 0000:01:00.0: buf[1864] : dfdfdfdfdfdfdfdf
[   81.260121] pci-endpoint-test 0000:01:00.0: buf[1872] : dfdfdfdfdfdfdfdf
[   81.266856] pci-endpoint-test 0000:01:00.0: buf[1880] : dfdfdfdfdfdfdfdf
[   81.273593] pci-endpoint-test 0000:01:00.0: buf[1888] : dfdfdfdfdfdfdfdf
[   81.280331] pci-endpoint-test 0000:01:00.0: buf[1896] : dfdfdfdfdfdfdfdf
[   81.287070] pci-endpoint-test 0000:01:00.0: buf[1904] : dfdfdfdfdfdfdfdf
[   81.293805] pci-endpoint-test 0000:01:00.0: buf[1912] : dfdfdfdfdfdfdfdf
[   81.300545] pci-endpoint-test 0000:01:00.0: buf[1920] : dfdfdfdfdfdfdfdf
[   81.307280] pci-endpoint-test 0000:01:00.0: buf[1928] : dfdfdfdfdfdfdfdf
[   81.314016] pci-endpoint-test 0000:01:00.0: buf[1936] : dfdfdfdfdfdfdfdf
[   81.320750] pci-endpoint-test 0000:01:00.0: buf[1944] : dfdfdfdfdfdfdfdf
[   81.327488] pci-endpoint-test 0000:01:00.0: buf[1952] : dfdfdfdfdfdfdfdf
[   81.334221] pci-endpoint-test 0000:01:00.0: buf[1960] : dfdfdfdfdfdfdfdf
[   81.340965] pci-endpoint-test 0000:01:00.0: buf[1968] : dfdfdfdfdfdfdfdf
[   81.347722] pci-endpoint-test 0000:01:00.0: buf[1976] : dfdfdfdfdfdfdfdf
[   81.354468] pci-endpoint-test 0000:01:00.0: buf[1984] : dfdfdfdfdfdfdfdf
[   81.361205] pci-endpoint-test 0000:01:00.0: buf[1992] : dfdfdfdfdfdfdfdf
[   81.367945] pci-endpoint-test 0000:01:00.0: buf[2000] : dfdfdfdfdfdfdfdf
[   81.374679] pci-endpoint-test 0000:01:00.0: buf[2008] : dfdfdfdfdfdfdfdf
[   81.381417] pci-endpoint-test 0000:01:00.0: buf[2016] : dfdfdfdfdfdfdfdf
[   81.388150] pci-endpoint-test 0000:01:00.0: buf[2024] : dfdfdfdfdfdfdfdf
[   81.394891] pci-endpoint-test 0000:01:00.0: buf[2032] : dfdfdfdfdfdfdfdf
[   81.401624] pci-endpoint-test 0000:01:00.0: buf[2040] : dfdfdfdfdfdfdfdf
[   81.408362] pci-endpoint-test 0000:01:00.0: buf[2048] : dfdfdfdfdfdfdfdf
[   81.415096] pci-endpoint-test 0000:01:00.0: buf[2056] : dfdfdfdfdfdfdfdf
[   81.421833] pci-endpoint-test 0000:01:00.0: buf[2064] : dfdfdfdfdfdfdfdf
[   81.428570] pci-endpoint-test 0000:01:00.0: buf[2072] : dfdfdfdfdfdfdfdf
[   81.435309] pci-endpoint-test 0000:01:00.0: buf[2080] : dfdfdfdfdfdfdfdf
[   81.442045] pci-endpoint-test 0000:01:00.0: buf[2088] : dfdfdfdfdfdfdfdf
[   81.448790] pci-endpoint-test 0000:01:00.0: buf[2096] : dfdfdfdfdfdfdfdf
[   81.455527] pci-endpoint-test 0000:01:00.0: buf[2104] : dfdfdfdfdfdfdfdf
[   81.462270] pci-endpoint-test 0000:01:00.0: buf[2112] : dfdfdfdfdfdfdfdf
[   81.469020] pci-endpoint-test 0000:01:00.0: buf[2120] : dfdfdfdfdfdfdfdf
[   81.475770] pci-endpoint-test 0000:01:00.0: buf[2128] : dfdfdfdfdfdfdfdf
[   81.482505] pci-endpoint-test 0000:01:00.0: buf[2136] : dfdfdfdfdfdfdfdf
[   81.489245] pci-endpoint-test 0000:01:00.0: buf[2144] : dfdfdfdfdfdfdfdf
[   81.495981] pci-endpoint-test 0000:01:00.0: buf[2152] : dfdfdfdfdfdfdfdf
[   81.502719] pci-endpoint-test 0000:01:00.0: buf[2160] : dfdfdfdfdfdfdfdf
[   81.509464] pci-endpoint-test 0000:01:00.0: buf[2168] : dfdfdfdfdfdfdfdf
[   81.516824] pci-endpoint-test 0000:01:00.0:
[   81.516824]
[   81.516824]
[   81.516824]
[   81.525562] pci-endpoint-test 0000:01:00.0: pci_endpoint_test_read
kzalloc:ffff0004b6392000 dma handle:7e92f000 buffer CRC:910c690d BAR
CRC:910c690d tmp buffer crc: 910c690d
READ (   2176 bytes):           OKAY
root@hihope-rzg2m:~# pcitest -r -s 2176
[   85.302372] pci-endpoint-test 0000:01:00.0: buf[0] : dfdfdfdfdfdfdfdf
[   85.308869] pci-endpoint-test 0000:01:00.0: buf[8] : dfdfdfdfdfdfdfdf
[   85.315361] pci-endpoint-test 0000:01:00.0: buf[16] : dfdfdfdfdfdfdfdf
[   85.321949] pci-endpoint-test 0000:01:00.0: buf[24] : dfdfdfdfdfdfdfdf
[   85.328517] pci-endpoint-test 0000:01:00.0: buf[32] : dfdfdfdfdfdfdfdf
[   85.335087] pci-endpoint-test 0000:01:00.0: buf[40] : dfdfdfdfdfdfdfdf
[   85.341649] pci-endpoint-test 0000:01:00.0: buf[48] : dfdfdfdfdfdfdfdf
[   85.348216] pci-endpoint-test 0000:01:00.0: buf[56] : dfdfdfdfdfdfdfdf
[   85.354778] pci-endpoint-test 0000:01:00.0: buf[64] : dfdfdfdfdfdfdfdf
[   85.361341] pci-endpoint-test 0000:01:00.0: buf[72] : dfdfdfdfdfdfdfdf
[   85.367902] pci-endpoint-test 0000:01:00.0: buf[80] : dfdfdfdfdfdfdfdf
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[   88.280547] pci-endpoint-test 0000:01:00.0: buf[1376] : dfdfdfdfdfdfdfdf
[   88.287283] pci-endpoint-test 0000:01:00.0: buf[1384] : dfdfdfdfdfdfdfdf
[   88.294018] pci-endpoint-test 0000:01:00.0: buf[1392] : dfdfdfdfdfdfdfdf
[   88.300752] pci-endpoint-test 0000:01:00.0: buf[1400] : dfdfdfdfdfdfdfdf
[   88.307491] pci-endpoint-test 0000:01:00.0: buf[1408] : dfdfdfdfdfdfdfdf
[   88.314226] pci-endpoint-test 0000:01:00.0: buf[1416] : dfdfdfdfdfdfdfdf
[   88.320967] pci-endpoint-test 0000:01:00.0: buf[1424] : dfdfdfdfdfdfdfdf
[   88.327721] pci-endpoint-test 0000:01:00.0: buf[1432] : dfdfdfdfdfdfdfdf
[   88.334468] pci-endpoint-test 0000:01:00.0: buf[1440] : dfdfdfdfdfdfdfdf
[   88.341204] pci-endpoint-test 0000:01:00.0: buf[1448] : dfdfdfdfdfdfdfdf
[   88.347945] pci-endpoint-test 0000:01:00.0: buf[1456] : dfdfdfdfdfdfdfdf
[   88.354680] pci-endpoint-test 0000:01:00.0: buf[1464] : dfdfdfdfdfdfdfdf
[   88.361416] pci-endpoint-test 0000:01:00.0: buf[1472] : dfdfdfdfdfdfdfdf
[   88.368153] pci-endpoint-test 0000:01:00.0: buf[1480] : dfdfdfdfdfdfdfdf
[   88.374890] pci-endpoint-test 0000:01:00.0: buf[1488] : dfdfdfdfdfdfdfdf
[   88.381626] pci-endpoint-test 0000:01:00.0: buf[1496] : dfdfdfdfdfdfdfdf
[   88.388361] pci-endpoint-test 0000:01:00.0: buf[1504] : dfdfdfdfdfdfdfdf
[   88.395095] pci-endpoint-test 0000:01:00.0: buf[1512] : dfdfdfdfdfdfdfdf
[   88.401833] pci-endpoint-test 0000:01:00.0: buf[1520] : dfdfdfdfdfdfdfdf
[   88.408569] pci-endpoint-test 0000:01:00.0: buf[1528] : dfdfdfdfdfdfdfdf
[   88.415306] pci-endpoint-test 0000:01:00.0: buf[1536] : dfdfdfdfdfdfdfdf
[   88.422041] pci-endpoint-test 0000:01:00.0: buf[1544] : dfdfdfdfdfdfdfdf
[   88.428783] pci-endpoint-test 0000:01:00.0: buf[1552] : dfdfdfdfdfdfdfdf
[   88.435521] pci-endpoint-test 0000:01:00.0: buf[1560] : dfdfdfdfdfdfdfdf
[   88.442263] pci-endpoint-test 0000:01:00.0: buf[1568] : dfdfdfdfdfdfdfdf
[   88.449012] pci-endpoint-test 0000:01:00.0: buf[1576] : dfdfdfdfdfdfdfdf
[   88.455756] pci-endpoint-test 0000:01:00.0: buf[1584] : dfdfdfdfdfdfdfdf
[   88.462494] pci-endpoint-test 0000:01:00.0: buf[1592] : dfdfdfdfdfdfdfdf
[   88.469232] pci-endpoint-test 0000:01:00.0: buf[1600] : dfdfdfdfdfdfdfdf
[   88.475967] pci-endpoint-test 0000:01:00.0: buf[1608] : dfdfdfdfdfdfdfdf
[   88.482705] pci-endpoint-test 0000:01:00.0: buf[1616] : dfdfdfdfdfdfdfdf
[   88.489442] pci-endpoint-test 0000:01:00.0: buf[1624] : dfdfdfdfdfdfdfdf
[   88.496205] pci-endpoint-test 0000:01:00.0: buf[1632] : dfdfdfdfdfdfdfdf
[   88.502942] pci-endpoint-test 0000:01:00.0: buf[1640] : dfdfdfdfdfdfdfdf
[   88.509681] pci-endpoint-test 0000:01:00.0: buf[1648] : dfdfdfdfdfdfdfdf
[   88.516416] pci-endpoint-test 0000:01:00.0: buf[1656] : dfdfdfdfdfdfdfdf
[   88.523154] pci-endpoint-test 0000:01:00.0: buf[1664] : dfdfdfdfdfdfdfdf
[   88.529895] pci-endpoint-test 0000:01:00.0: buf[1672] : dfdfdfdfdfdfdfdf
[   88.536633] pci-endpoint-test 0000:01:00.0: buf[1680] : dfdfdfdfdfdfdfdf
[   88.543371] pci-endpoint-test 0000:01:00.0: buf[1688] : dfdfdfdfdfdfdfdf
[   88.550108] pci-endpoint-test 0000:01:00.0: buf[1696] : dfdfdfdfdfdfdfdf
[   88.556844] pci-endpoint-test 0000:01:00.0: buf[1704] : dfdfdfdfdfdfdfdf
[   88.563583] pci-endpoint-test 0000:01:00.0: buf[1712] : dfdfdfdfdfdfdfdf
[   88.570318] pci-endpoint-test 0000:01:00.0: buf[1720] : dfdfdfdfdfdfdfdf
[   88.577055] pci-endpoint-test 0000:01:00.0: buf[1728] : dfdfdfdfdfdfdfdf
[   88.583791] pci-endpoint-test 0000:01:00.0: buf[1736] : dfdfdfdfdfdfdfdf
[   88.590530] pci-endpoint-test 0000:01:00.0: buf[1744] : dfdfdfdfdfdfdfdf
[   88.597263] pci-endpoint-test 0000:01:00.0: buf[1752] : dfdfdfdfdfdfdfdf
[   88.604003] pci-endpoint-test 0000:01:00.0: buf[1760] : dfdfdfdfdfdfdfdf
[   88.610740] pci-endpoint-test 0000:01:00.0: buf[1768] : dfdfdfdfdfdfdfdf
[   88.617505] pci-endpoint-test 0000:01:00.0: buf[1776] : dfdfdfdfdfdfdfdf
[   88.624251] pci-endpoint-test 0000:01:00.0: buf[1784] : dfdfdfdfdfdfdfdf
[   88.630996] pci-endpoint-test 0000:01:00.0: buf[1792] : dfdfdfdfdfdfdfdf
[   88.637731] pci-endpoint-test 0000:01:00.0: buf[1800] : dfdfdfdfdfdfdfdf
[   88.644470] pci-endpoint-test 0000:01:00.0: buf[1808] : dfdfdfdfdfdfdfdf
[   88.651206] pci-endpoint-test 0000:01:00.0: buf[1816] : dfdfdfdfdfdfdfdf
[   88.657945] pci-endpoint-test 0000:01:00.0: buf[1824] : dfdfdfdfdfdfdfdf
[   88.664682] pci-endpoint-test 0000:01:00.0: buf[1832] : dfdfdfdfdfdfdfdf
[   88.671420] pci-endpoint-test 0000:01:00.0: buf[1840] : dfdfdfdfdfdfdfdf
[   88.678155] pci-endpoint-test 0000:01:00.0: buf[1848] : dfdfdfdfdfdfdfdf
[   88.684892] pci-endpoint-test 0000:01:00.0: buf[1856] : dfdfdfdfdfdfdfdf
[   88.691626] pci-endpoint-test 0000:01:00.0: buf[1864] : dfdfdfdfdfdfdfdf
[   88.698365] pci-endpoint-test 0000:01:00.0: buf[1872] : dfdfdfdfdfdfdfdf
[   88.705103] pci-endpoint-test 0000:01:00.0: buf[1880] : dfdfdfdfdfdfdfdf
[   88.711839] pci-endpoint-test 0000:01:00.0: buf[1888] : dfdfdfdfdfdfdfdf
[   88.718574] pci-endpoint-test 0000:01:00.0: buf[1896] : dfdfdfdfdfdfdfdf
[   88.725310] pci-endpoint-test 0000:01:00.0: buf[1904] : dfdfdfdfdfdfdfdf
[   88.732051] pci-endpoint-test 0000:01:00.0: buf[1912] : dfdfdfdfdfdfdfdf
[   88.738795] pci-endpoint-test 0000:01:00.0: buf[1920] : dfdfdfdfdfdfdfdf
[   88.745543] pci-endpoint-test 0000:01:00.0: buf[1928] : dfdfdfdfdfdfdfdf
[   88.752289] pci-endpoint-test 0000:01:00.0: buf[1936] : dfdfdfdfdfdfdfdf
[   88.759029] pci-endpoint-test 0000:01:00.0: buf[1944] : dfdfdfdfdfdfdfdf
[   88.765769] pci-endpoint-test 0000:01:00.0: buf[1952] : dfdfdfdfdfdfdfdf
[   88.772505] pci-endpoint-test 0000:01:00.0: buf[1960] : dfdfdfdfdfdfdfdf
[   88.779245] pci-endpoint-test 0000:01:00.0: buf[1968] : dfdfdfdfdfdfdfdf
[   88.785978] pci-endpoint-test 0000:01:00.0: buf[1976] : dfdfdfdfdfdfdfdf
[   88.792720] pci-endpoint-test 0000:01:00.0: buf[1984] : dfdfdfdfdfdfdfdf
[   88.799453] pci-endpoint-test 0000:01:00.0: buf[1992] : dfdfdfdfdfdfdfdf
[   88.806194] pci-endpoint-test 0000:01:00.0: buf[2000] : dfdfdfdfdfdfdfdf
[   88.812930] pci-endpoint-test 0000:01:00.0: buf[2008] : dfdfdfdfdfdfdfdf
[   88.819668] pci-endpoint-test 0000:01:00.0: buf[2016] : dfdfdfdfdfdfdfdf
[   88.826403] pci-endpoint-test 0000:01:00.0: buf[2024] : dfdfdfdfdfdfdfdf
[   88.833207] pci-endpoint-test 0000:01:00.0: buf[2032] : dfdfdfdfdfdfdfdf
[   88.839961] pci-endpoint-test 0000:01:00.0: buf[2040] : dfdfdfdfdfdfdfdf
[   88.846710] pci-endpoint-test 0000:01:00.0: buf[2048] : dfdfdfdfdfdfdfdf
[   88.853463] pci-endpoint-test 0000:01:00.0: buf[2056] : dfdfdfdfdfdfdfdf
[   88.860202] pci-endpoint-test 0000:01:00.0: buf[2064] : dfdfdfdfdfdfdfdf
[   88.866939] pci-endpoint-test 0000:01:00.0: buf[2072] : dfdfdfdfdfdfdfdf
[   88.873675] pci-endpoint-test 0000:01:00.0: buf[2080] : dfdfdfdfdfdfdfdf
[   88.880410] pci-endpoint-test 0000:01:00.0: buf[2088] : dfdfdfdfdfdfdfdf
[   88.887145] pci-endpoint-test 0000:01:00.0: buf[2096] : dfdfdfdfdfdfdfdf
[   88.893879] pci-endpoint-test 0000:01:00.0: buf[2104] : dfdfdfdfdfdfdfdf
[   88.900619] pci-endpoint-test 0000:01:00.0: buf[2112] : dfdfdfdfdfdfdfdf
[   88.907353] pci-endpoint-test 0000:01:00.0: buf[2120] : dfdfdfdfdfdfdfdf
[   88.914091] pci-endpoint-test 0000:01:00.0: buf[2128] : dfdfdfdfdfdfdfdf
[   88.920825] pci-endpoint-test 0000:01:00.0: buf[2136] : dfdfdfdfdfdfdfdf
[   88.927562] pci-endpoint-test 0000:01:00.0: buf[2144] : dfdfdfdfdfdfdfdf
[   88.934303] pci-endpoint-test 0000:01:00.0: buf[2152] : dfdfdfdfdfdfdfdf
[   88.941043] pci-endpoint-test 0000:01:00.0: buf[2160] : dfdfdfdfdfdfdfdf
[   88.947781] pci-endpoint-test 0000:01:00.0: buf[2168] : dfdfdfdfdfdfdfdf
[   88.955146] pci-endpoint-test 0000:01:00.0:
[   88.955146]
[   88.955146]
[   88.955146]
[   88.963900] pci-endpoint-test 0000:01:00.0: pci_endpoint_test_read
kzalloc:ffff0004b6393000 dma handle:7e93c800 buffer CRC:ce535039 BAR
CRC:910c690d tmp buffer crc: ce535039
READ (   2176 bytes):           NOT OKAY

And starangely even tmp_buffer has the value of 0xDF, but the CRC is screwed.

Cheers,
--Prabhakar

> Best regards,
> Yoshihiro Shimoda
>
> > Cheers,
> > --Prabhakar