[ofw] patch: Use tFirst method on interrupts

[Tzachi Dar]

Applied on 1439.
 
Thanks
Tzachi


________________________________

	From: ofw-bounces at lists.openfabrics.org
[mailto:ofw-bounces at lists.openfabrics.org] On Behalf Of Tzachi Dar
	Sent: Monday, July 21, 2008 6:57 PM
	To: ofw at lists.openfabrics.org
	Subject: [ofw] patch: Use tFirst method on interrupts
	
	
	The following patch changes the default behavior of mlx4 from
tLast to tFirst.
	 
	Assuming that interrupt moderation is set to x us than:
	 
	tLast method means that an interrupt is generated after x us
that no packet arrives. (that is if packets continue to arrive, no
interrupt will be generated).
	
	tFirst method means that an interrupt is generated after x us
from the first packet. (even if packets continue to arrive).
	 
	Index: Q:/projinf4/trunk/hw/mlx4/kernel/bus/net/fw.c
	
===================================================================
	--- Q:/projinf4/trunk/hw/mlx4/kernel/bus/net/fw.c (revision
2835)
	+++ Q:/projinf4/trunk/hw/mlx4/kernel/bus/net/fw.c (revision
2836)
	@@ -712,6 +712,12 @@
	 #else
	 #error Host endianness not defined
	 #endif
	+
	+ if (g.mod_interrupt_from_first) {
	+  // Bit 30,31 tell the moderation method, 0 default, 1 from
first packet
	+  *(inbox + INIT_HCA_FLAGS_OFFSET / 4) |= cpu_to_be32(1 << 30);
	+ }
	+
	  /* Check port for UD address vector: */
	  *(inbox + INIT_HCA_FLAGS_OFFSET / 4) |= cpu_to_be32(1);
	 
	Index: Q:/projinf4/trunk/hw/mlx4/kernel/bus/net/mlx4.h
	
===================================================================
	--- Q:/projinf4/trunk/hw/mlx4/kernel/bus/net/mlx4.h (revision
2835)
	+++ Q:/projinf4/trunk/hw/mlx4/kernel/bus/net/mlx4.h (revision
2836)
	@@ -88,6 +88,7 @@
	  int mod_enable_qos;
	  int mod_mlx4_blck_lb;
	  enum mlx4_port_type mod_port_type[MLX4_MAX_PORTS];
	+ int mod_interrupt_from_first;
	 
	  int mod_msi_enable;
	  int mod_msi_num_vector;
	Index: Q:/projinf4/trunk/hw/mlx4/kernel/bus/drv/mlx4_bus.inf
	
===================================================================
	--- Q:/projinf4/trunk/hw/mlx4/kernel/bus/drv/mlx4_bus.inf
(revision 2835)
	+++ Q:/projinf4/trunk/hw/mlx4/kernel/bus/drv/mlx4_bus.inf
(revision 2836)
	@@ -184,14 +184,15 @@
	 HKR,"Parameters","LogNumMpt",%REG_DWORD%,0x00000012
	 HKR,"Parameters","LogNumMtt",%REG_DWORD%,0x00000014
	 HKR,"Parameters","EnableQoS",%REG_DWORD%,0x00000001
	+HKR,"Parameters","BlockMcastLoopBack",%REG_DWORD%,0x00000000
	
+HKR,"Parameters","InterruptFromFirstPacket",%REG_DWORD%,0x00000001
	+
	 HKR,"Parameters","NumMac",%REG_DWORD%,0x00000001
	 HKR,"Parameters","NumVlan",%REG_DWORD%,0x00000000
	 HKR,"Parameters","UsePrio",%REG_DWORD%,0x00000000
	 HKR,"Parameters","PortType",%REG_SZ%,"ib,ib"
	 
	 
	-HKR,"Parameters","BlockMcastLoopBack",%REG_DWORD%,0x00000000
	-
	
HKLM,"System\CurrentControlSet\Control\WMI\GlobalLogger\E51BB6E2-914A-4e
21-93C0-192F4801BBFF","Flags",%REG_DWORD%,0xffff
	
HKLM,"System\CurrentControlSet\Control\WMI\GlobalLogger\E51BB6E2-914A-4e
21-93C0-192F4801BBFF","Level",%REG_DWORD%,0x3
	 
	Index: Q:/projinf4/trunk/hw/mlx4/kernel/bus/drv/drv.c
	
===================================================================
	--- Q:/projinf4/trunk/hw/mlx4/kernel/bus/drv/drv.c (revision
2835)
	+++ Q:/projinf4/trunk/hw/mlx4/kernel/bus/drv/drv.c (revision
2836)
	@@ -894,9 +894,6 @@
	  // "log maximum number of memory translation table segments
per HCA"
	  DECLARE_CONST_UNICODE_STRING(numMtt, L"LogNumMtt"); 
	 
	- // "Enable Quality of Service support in the HCA if > 0,
(default 1)"
	- DECLARE_CONST_UNICODE_STRING(enableQoS, L"EnableQoS"); 
	-
	  // "Maximum number of MACs per ETH port (1-127, default 1"
	  DECLARE_CONST_UNICODE_STRING(numMac, L"NumMac"); 
	 
	@@ -906,9 +903,15 @@
	  // "Enable steering by VLAN priority on ETH ports (0/1,
default 0)"
	  DECLARE_CONST_UNICODE_STRING(usePrio, L"UsePrio"); 
	 
	+ // "Enable Quality of Service support in the HCA if > 0,
(default 1)"
	+ DECLARE_CONST_UNICODE_STRING(enableQoS, L"EnableQoS"); 
	+
	  // "Block multicast loopback packets if > 0 (default 1)"
	  DECLARE_CONST_UNICODE_STRING(BlockMcastLB,
L"BlockMcastLoopBack"); 
	 
	+ // "Measure the interrupt from the first packet (default 1)"
	+ DECLARE_CONST_UNICODE_STRING(InterruptFromFirstPacket,
L"InterruptFromFirstPacket"); 
	+
	  // "Ports L2 type (ib/eth/auto, entry per port, comma
seperated, default ib for all)"
	  DECLARE_CONST_UNICODE_STRING(PortType, L"PortType");
	 
	@@ -970,12 +973,6 @@
	   if (NT_SUCCESS (status)) 
	    g.mod_num_mtt = value;
	 
	-  status = WdfRegistryQueryULong(hKey, &enableQoS, &value);
	-  if (NT_SUCCESS (status)) 
	-   g.mod_enable_qos = value;
	-  else
	-   g.mod_enable_qos = 1;
	-
	   status = WdfRegistryQueryULong(hKey, &numMac, &value);
	   if (NT_SUCCESS (status)) 
	    g.mod_num_mac = value;
	@@ -994,12 +991,26 @@
	   else
	    g.mod_use_prio = 0;
	 
	+  status = WdfRegistryQueryULong(hKey, &enableQoS, &value);
	+  if (NT_SUCCESS (status)) 
	+   g.mod_enable_qos = value;
	+  else
	+   g.mod_enable_qos = 1;
	+
	+
	   status = WdfRegistryQueryULong(hKey, &BlockMcastLB, &value);
	   if (NT_SUCCESS (status)) 
	    g.mod_mlx4_blck_lb = value;
	   else
	    g.mod_mlx4_blck_lb = 1;
	 
	+  status = WdfRegistryQueryULong(hKey,
&InterruptFromFirstPacket, &value);
	+  if (NT_SUCCESS (status)) 
	+   g.mod_interrupt_from_first = value;
	+  else
	+   g.mod_interrupt_from_first = 1;
	+
	+
	   status = WdfRegistryQueryULong(hKey, &MsiEnable, &value);
	   if (NT_SUCCESS (status)) 
	    g.mod_msi_enable = value;
	

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