** Description changed:

  [Impact]
- Several issues in the RDMA/hns driver for HiSilicon network adapters have 
recently landed upstream. 
- 
- TBD: Summarize.
+ Several issues and features in the RDMA/hns driver for HiSilicon network 
adapters have recently landed upstream. This includes fixes for crashes and 
endianness issues, among others.
  
  [Test Case]
- TBD
+ Server side:
+ ubuntu@d06-1:~$ ib_write_bw -n 5 -d hns_2
+ 
+ ************************************
+ * Waiting for client to connect... *
+ ************************************
+ hr_qp->port_num= 0x1
+ 
---------------------------------------------------------------------------------------
+                     RDMA_Write BW Test
+  Dual-port       : OFF                Device         : hns_2
+  Number of qps   : 1          Transport type : IB
+  Connection type : RC         Using SRQ      : OFF
+  CQ Moderation   : 5
+  Mtu             : 1024[B]
+  Link type       : Ethernet
+  GID index       : 2
+  Max inline data : 0[B]
+  rdma_cm QPs   : OFF
+  Data ex. method : Ethernet
+ 
---------------------------------------------------------------------------------------
+  local address: LID 0000 QPN 0x000c PSN 0x368fa8 RKey 0x000200 VAddr 
0x00ffffbe390000
+  GID: 00:00:00:00:00:00:00:00:00:00:255:255:10:228:68:237
+  remote address: LID 0000 QPN 0x000c PSN 0x19f3aa RKey 0x000200 VAddr 
0x00ffff83380000
+  GID: 00:00:00:00:00:00:00:00:00:00:255:255:10:228:68:192
+ 
---------------------------------------------------------------------------------------
+  #bytes     #iterations    BW peak[MB/sec]    BW average[MB/sec]   
MsgRate[Mpps]
+  65536      5                108.08             108.08                   
0.001729
+ 
---------------------------------------------------------------------------------------
+ 
+ Client side:
+ ubuntu@d06-2:~$ ib_write_bw -n 5 -d hns_2 10.228.68.237 
+ hr_qp->port_num= 0x1
+ 
---------------------------------------------------------------------------------------
+                     RDMA_Write BW Test
+  Dual-port       : OFF                Device         : hns_2
+  Number of qps   : 1          Transport type : IB
+  Connection type : RC         Using SRQ      : OFF
+  TX depth        : 5
+  CQ Moderation   : 5
+  Mtu             : 1024[B]
+  Link type       : Ethernet
+  GID index       : 2
+  Max inline data : 0[B]
+  rdma_cm QPs   : OFF
+  Data ex. method : Ethernet
+ 
---------------------------------------------------------------------------------------
+  local address: LID 0000 QPN 0x000c PSN 0x19f3aa RKey 0x000200 VAddr 
0x00ffff83380000
+  GID: 00:00:00:00:00:00:00:00:00:00:255:255:10:228:68:192
+  remote address: LID 0000 QPN 0x000c PSN 0x368fa8 RKey 0x000200 VAddr 
0x00ffffbe390000
+  GID: 00:00:00:00:00:00:00:00:00:00:255:255:10:228:68:237
+ 
---------------------------------------------------------------------------------------
+  #bytes     #iterations    BW peak[MB/sec]    BW average[MB/sec]   
MsgRate[Mpps]
+  65536      5                108.08             108.08                   
0.001729
+ 
---------------------------------------------------------------------------------------
  
  [Regression Risk]
- TBD
+ TLDR; this driver isn't usable today, so changes to it carry negligible 
regression risk.
+ 
+ These patches are localized to the hns/RDMA driver. This driver is for
+ hardware in the hip07/hip08 SoCs, which Ubuntu supports in the D05 and
+ D06 servers respectively. D05 firmware has intentionally disabled this
+ feature by not exposing the ACPI ID for it. The driver therefore doesn't
+ find the device on that platform, so there is no regression risk.
+ 
+ D06 *does* enable this device in firmware. However, the current bionic
+ kernel crashes when loading the base ethernet driver (hns3 - LP:
+ #1768670) on this platform, so this feature is also currently unusable
+ there.

-- 
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https://bugs.launchpad.net/bugs/1770974

Title:
  Fix several bugs in RDMA/hns driver

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Bionic:
  In Progress

Bug description:
  [Impact]
  Several issues and features in the RDMA/hns driver for HiSilicon network 
adapters have recently landed upstream. This includes fixes for crashes and 
endianness issues, among others.

  [Test Case]
  Server side:
  ubuntu@d06-1:~$ ib_write_bw -n 5 -d hns_2

  ************************************
  * Waiting for client to connect... *
  ************************************
  hr_qp->port_num= 0x1
  
---------------------------------------------------------------------------------------
                      RDMA_Write BW Test
   Dual-port       : OFF                Device         : hns_2
   Number of qps   : 1          Transport type : IB
   Connection type : RC         Using SRQ      : OFF
   CQ Moderation   : 5
   Mtu             : 1024[B]
   Link type       : Ethernet
   GID index       : 2
   Max inline data : 0[B]
   rdma_cm QPs   : OFF
   Data ex. method : Ethernet
  
---------------------------------------------------------------------------------------
   local address: LID 0000 QPN 0x000c PSN 0x368fa8 RKey 0x000200 VAddr 
0x00ffffbe390000
   GID: 00:00:00:00:00:00:00:00:00:00:255:255:10:228:68:237
   remote address: LID 0000 QPN 0x000c PSN 0x19f3aa RKey 0x000200 VAddr 
0x00ffff83380000
   GID: 00:00:00:00:00:00:00:00:00:00:255:255:10:228:68:192
  
---------------------------------------------------------------------------------------
   #bytes     #iterations    BW peak[MB/sec]    BW average[MB/sec]   
MsgRate[Mpps]
   65536      5                108.08             108.08                   
0.001729
  
---------------------------------------------------------------------------------------

  Client side:
  ubuntu@d06-2:~$ ib_write_bw -n 5 -d hns_2 10.228.68.237 
  hr_qp->port_num= 0x1
  
---------------------------------------------------------------------------------------
                      RDMA_Write BW Test
   Dual-port       : OFF                Device         : hns_2
   Number of qps   : 1          Transport type : IB
   Connection type : RC         Using SRQ      : OFF
   TX depth        : 5
   CQ Moderation   : 5
   Mtu             : 1024[B]
   Link type       : Ethernet
   GID index       : 2
   Max inline data : 0[B]
   rdma_cm QPs   : OFF
   Data ex. method : Ethernet
  
---------------------------------------------------------------------------------------
   local address: LID 0000 QPN 0x000c PSN 0x19f3aa RKey 0x000200 VAddr 
0x00ffff83380000
   GID: 00:00:00:00:00:00:00:00:00:00:255:255:10:228:68:192
   remote address: LID 0000 QPN 0x000c PSN 0x368fa8 RKey 0x000200 VAddr 
0x00ffffbe390000
   GID: 00:00:00:00:00:00:00:00:00:00:255:255:10:228:68:237
  
---------------------------------------------------------------------------------------
   #bytes     #iterations    BW peak[MB/sec]    BW average[MB/sec]   
MsgRate[Mpps]
   65536      5                108.08             108.08                   
0.001729
  
---------------------------------------------------------------------------------------

  [Regression Risk]
  TLDR; this driver isn't usable today, so changes to it carry negligible 
regression risk.

  These patches are localized to the hns/RDMA driver. This driver is for
  hardware in the hip07/hip08 SoCs, which Ubuntu supports in the D05 and
  D06 servers respectively. D05 firmware has intentionally disabled this
  feature by not exposing the ACPI ID for it. The driver therefore
  doesn't find the device on that platform, so there is no regression
  risk.

  D06 *does* enable this device in firmware. However, the current bionic
  kernel crashes when loading the base ethernet driver (hns3 - LP:
  #1768670) on this platform, so this feature is also currently unusable
  there.

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https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1770974/+subscriptions

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