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path: root/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
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* | amd-xgbe: Fix a spelling errorLendacky, Thomas2014-11-051-2/+2
| | | | | | | | | | | | | | | | This patch fixes the spelling of the word "descriptor" in a couple of locations. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | amd-xgbe: Provide support for receive side scalingLendacky, Thomas2014-11-051-1/+15
| | | | | | | | | | | | | | | | | | | | This patch provides support for receive side scaling (RSS). RSS allows for spreading incoming network packets across the Rx queues. When used in conjunction with the per DMA channel interrupt support, this allows the receive processing to be spread across multiple processors. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | amd-xgbe: Add support for per DMA channel interruptsLendacky, Thomas2014-11-051-42/+184
| | | | | | | | | | | | | | | | | | This patch provides support for interrupts that are generated by the Tx/Rx DMA channel pairs of the device. This allows for Tx and Rx processing to run across multiple processsors. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | amd-xgbe: Implement split header receive supportLendacky, Thomas2014-11-051-31/+32
| | | | | | | | | | | | | | | | | | | | Provide support for splitting IP packets so that the header and payload can be sent to different DMA addresses. This will allow the IP header to be put into the linear part of the skb while the payload can be added as frags. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | amd-xgbe: Use page allocations for Rx buffersLendacky, Thomas2014-11-051-34/+61
| | | | | | | | | | | | | | | | Use page allocations for Rx buffers instead of pre-allocating skbs of a set size. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | amd-xgbe: Rename pre_xmit function to dev_xmitLendacky, Thomas2014-11-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | The pre_xmit function name implies that it performs operations prior to transmitting the packet when in fact it is responsible for setting up the descriptors and initiating the transmit. Rename this to function from pre_xmit to dev_xmit, which is consistent with the name used during receive processing - dev_read. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | amd-xgbe: Move ring allocation to device openLendacky, Thomas2014-11-051-4/+89
|/ | | | | | | | | Move the channel and ring tracking structures allocation to device open. This will allow for future support to vary the number of Tx/Rx queues without unloading the module. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* amd-xgbe: Fix napi Rx budget accountingLendacky, Thomas2014-10-221-8/+12
| | | | | | | | | | | | | | | | Currently the amd-xgbe driver increments the packets processed counter each time a descriptor is processed. Since a packet can be represented by more than one descriptor incrementing the counter in this way is not appropriate. Also, since multiple descriptors cause the budget check to be short circuited, sometimes the returned value from the poll function would be larger than the budget value resulting in a WARN_ONCE being triggered. Update the polling logic to properly account for the number of packets processed and exit when the budget value is reached. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* amd-xgbe: Properly handle feature changes via ethtoolLendacky, Thomas2014-10-221-1/+1
| | | | | | | | | | | | | The ndo_set_features callback function was improperly using an unsigned int to save the current feature value for features such as NETIF_F_RXCSUM. Since that feature is in the upper 32 bits of a 64 bit variable the result was always 0 making it not possible to actually turn off the hardware RX checksum support. Change the unsigned int type to the netdev_features_t type in order to properly capture the current value and perform the proper operation. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2014-09-071-0/+2
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| * amd-xgbe: Check for Tx hardware queue flushing supportLendacky, Thomas2014-09-011-0/+2
| | | | | | | | | | | | | | | | | | The flushing of the Tx hardware queues is only supported at a certain level of the hardware. Retrieve the current version of the hardware and use that to determine if flushing is supported. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | amd-xgbe: Checkpatch driver fixesLendacky, Thomas2014-09-051-1/+0
|/ | | | | | | | This patch contains fixes identified by checkpatch when run with the strict option. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* amd: xgbe: fix duplicate #include of linux/phy.hJean Sacren2014-08-071-1/+0
| | | | | | | | The header linux/phy.h was included twice, so delete one of them. Signed-off-by: Jean Sacren <sakiwit@gmail.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* amd-xgbe: Perform phy connect/disconnect at dev open/stopLendacky, Thomas2014-08-051-1/+121
| | | | | | | | | | | | | | | | | A change added to the mdiobus/phy api added a module_get/module_put during phy connect/disconnect processing. Currently, the driver performs a phy connect during module probe and a phy disconnect during module remove. With the addition of the module_get during phy connect the amd-xgbe module use count is incremented and can no longer be unloaded. Move the phy connect/disconnect from the driver probe/remove functions to the net_device_ops ndo_open/ndo_stop functions. This allows the module use count to be decremented when the device(s) are brought down and allows the module to be unloaded. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* amd-xgbe: Add traffic class supportLendacky, Thomas2014-07-301-0/+29
| | | | | | | | | This patch adds support for traffic classes as well as support for Data Center Bridging interfaces related to traffic classes and priority flow control. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* amd-xgbe: Add hardware timestamp supportLendacky, Thomas2014-07-301-41/+331
| | | | | | | This patch adds support for Tx and Rx hardware timestamping. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* amd-xgbe: Performance enhancementsLendacky, Thomas2014-07-071-33/+58
| | | | | | | | | | | | | | | | | | This patch provides some general performance enhancements for the driver: - Modify the default coalescing settings (reduce usec, increase frames) - Change the AXI burst length to 256 bytes (default was 16 bytes which was smaller than a cache line) - Change the AXI cache settings to write-back/write-allocate which allocate cache entries for received packets during the DMA since the packet will be processed soon afterwards - Combine ioread/iowrite when disabling both the Tx and Rx interrupts - Change to processing the Tx/Rx channels in pairs - Only recycle the Rx descriptors when a threshold of dirty descriptors is reached Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* amd-xgbe: Call netif_napi_del on ndo_stop operationLendacky, Thomas2014-07-071-3/+6
| | | | | | | | | | | | Currently the napi context is added using netif_napi_add each time the ndo_open operation is called. However, there is not a corresponding netif_napi_del call during the ndo_stop operation. If the device ndo_open operation was called more than once an infinite loop occurs during module unload. Add a call to netif_napi_del during the ndo_stop operation. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* amd-xgbe: Change destination address filtering supportLendacky, Thomas2014-06-261-10/+17
| | | | | | | | | | | | | Currently the driver makes use of the additional mac address registers in the hardware to provide perfect filtering. The hardware can also have a set of hash table registers that can be used for imperfect filtering. By using imperfect filtering the additional mac address registers can be used for layer 2 filtering support. Use the hash table registers if the device has them. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* amd-xgbe: Add support for VLAN filteringLendacky, Thomas2014-06-261-13/+47
| | | | | | | | | | | | This patch adds support for (imperfect) filtering of VLAN tag ids using a 16-bit filter hash table. When VLANs are added, a 4-bit hash is calculated with the result indicating the bit in the hash table to set. This table is used by the hardware to drop packets with a VLAN id that does not hash to a set bit in the table. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* amd-xgbe: Make defines in xgbe.h uniqueLendacky, Thomas2014-06-261-13/+15
| | | | | | | | In order to avoid conflicts with other include files, add a prefix to the defines in xgbe.h. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* amd-xgbe: Initial AMD 10GbE platform driverLendacky, Thomas2014-06-051-0/+1351
This patch provides the initial platform driver for the AMD 10GbE device. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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