Messages in this thread | | | Date | Thu, 25 Jul 2002 20:14:13 -0700 (PDT) | From | abhishek Sinha <> | Subject | Intel Plumas Chipset and 100Mhz PCI cards |
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Hello List member
I am using Intel ClearWater SE7500CW2 motherboard which uses Pentium 4 based Xeon processors.Also the motherboard has 2 PCI/PCI-X 64 bit 100Mhz slots.I am trying to use Intel PCI-X Gigabit Card on the machine.It works fine but when i check the /proc entry, here is what i find.
/proc/net/PRO_LAN_Adapters/eth2
escription Intel(R) PRO/1000 Network Connection Part_Number a50484-006 Driver_Name e1000 Driver_Version 4.3.2 PCI_Vendor 0x8086 PCI_Device_ID 0x1009 PCI_Subsystem_Vendor 0x8086 PCI_Subsystem_ID 0x1109 PCI_Revision_ID 0x02 PCI_Bus 2 PCI_Slot 1 PCI_Bus_Type PCI PCI_Bus_Speed 66MHz PCI_Bus_Width 64-bit IRQ 24 System_Device_Name eth2 Current_HWaddr 00:02:B3:9E:5A:1A Permanent_HWaddr 00:02:B3:9E:5A:1A
Link up Speed 1000 Duplex Full State up
Rx_Packets 0 Tx_Packets 0 Rx_Bytes 0 Tx_Bytes 0 Rx_Errors 0 Tx_Errors 0 Rx_Dropped 0 Tx_Dropped 0 Multicast 0 Collisions 0 Rx_Length_Errors 0 Rx_Over_Errors 0 Rx_CRC_Errors 0 Rx_Frame_Errors 0 Rx_FIFO_Errors 0 Rx_Missed_Errors 0 Tx_Aborted_Errors 0 Tx_Carrier_Errors 0 Tx_FIFO_Errors 0 Tx_Heartbeat_Errors 0 Tx_Window_Errors 0 Tx_Abort_Late_Coll 0 Tx_Deferred_Ok 0 Tx_Single_Coll_Ok 0 Tx_Multi_Coll_Ok 0 Rx_Long_Length_Errors 0 Rx_Short_Length_Errors 0 Rx_Align_Errors 0 Rx_Flow_Control_XON 0 Rx_Flow_Control_XOFF 0 Tx_Flow_Control_XON 0 Tx_Flow_Control_XOFF 0 Rx_CSum_Offload_Good 0 Rx_CSum_Offload_Errors 0
PHY_Media_Type Fiber
The card shows up as 66 Mhz slot even if the PCI slot is offering 100Mhz speed.Then i checked with the latest version of the intel e1000 driver.
In one of the files e1000_proc.c this is what i found.
static char * e1000_proc_bus_speed(void *data, size_t len, char *buf) { e1000_bus_speed bus_speed = *(e1000_bus_speed *)data; sprintf(buf, bus_speed == e1000_bus_speed_33 ? 33MHz" : bus_speed == e1000_bus_speed_66 ? "66MHz" : bus_speed == e1000_bus_speed_100 ? "100MHz" : bus_speed == e1000_bus_speed_133 ? "133MHz" : "UNKNOWN"); return buf; }
So i guess this means that the driver does recognise the bus speed of 100Mhz. I also went and looked into the data sheet of the PCI hub on the motherboard which is in the link below:
ftp://download.intel.com/design/chipsets/e7500/datashts/29073201.pdf
In page 50, a CNF register is defined which seems to support configuration ar 100 Mhz or 133 Mhz.
So now i am wondering whether /proc is given me the wrong information of its a limitation of the kernel that it cant recognise e1000 driver.Currently i am using the 2.4.18 kernel and am wondering if this chipset support is available in linux kernel?
Given the slightest hint i am willing to work on it to find out the solution; Any help will be greatly appreciated.Please cc: me the answers /suggestions since i am not on the list
Thanking all
abhishek Sinha
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