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path: root/drivers/net/ethernet/intel/i40e/i40e_txrx.c
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2013-10-22i40e: tweaking icr0 handling for legacy irqShannon Nelson1-1/+2
Fix the overactive irq issue seen in testing and allow use of the legacy interrupt. Signed-off-by: Shannon Nelson <[email protected]> Signed-off-by: Jesse Brandeburg <[email protected]> Tested-by: Kavindya Deegala <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
2013-10-22i40e: refactor fdir setup functionJesse Brandeburg1-45/+33
This function did a lot of unnecessary cpu_to_xxx(foo) and making it worse, each of these calls caused a lot of line wrapping. Fix look and feel via a refactor of this function. No functional changes. Signed-off-by: Jesse Brandeburg <[email protected]> Tested-by: Kavindya Deegala <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
2013-10-22i40e: fix sign extension issueJesse Brandeburg1-6/+6
This is a fix for an issue reported by coverity, reported by Hannes Frederic Sowa. Signed-off-by: Jesse Brandeburg <[email protected]> CC: Hannes Frederic Sowa <[email protected]> Tested-by: Kavindya Deegala <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
2013-10-22i40e: do not flush after re-enabling interruptsJesse Brandeburg1-2/+0
Hot path doesn't need read-flush after interrupt enable, and this flush really causes a lot of extra cpu utilization. Signed-off-by: Jesse Brandeburg <[email protected]> Tested-by: Kavindya Deegala <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
2013-10-09i40e: Add support for 64 bit netstatsAlexander Duyck1-0/+4
This change brings support for 64 bit netstats to the driver. Previously the stats were 64 bit but highly racy due to the fact that 64 bit transactions are not atomic on 32 bit systems. This change makes is so that the 64 bit byte and packet stats are reliable on all architectures. Signed-off-by: Alexander Duyck <[email protected]> Signed-off-by: Jesse Brandeburg <[email protected]> Tested-by: Kavindya Deegala <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
2013-10-09i40e: Move rings from pointer to array to array of pointersAlexander Duyck1-2/+2
Allocate the queue pairs individually instead of as a group. This allows for much easier queue management as it is possible to dynamically resize the queues without having to free and allocate the entire block. Ease statistic collection by treating Tx/Rx queue pairs as a single unit. Each pair is allocated together and starts with a Tx queue and ends with an Rx queue. By ordering them this way it is possible to know the Rx offset based on a pointer to the Tx queue. Signed-off-by: Alexander Duyck <[email protected]> Signed-off-by: Jesse Brandeburg <[email protected]> Tested-by: Kavindya Deegala <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
2013-10-09i40e: Replace ring container array with linked listAlexander Duyck1-9/+10
This replaces the ring container array with a linked list. The idea is to make the logic much easier to deal with since this will allow us to call a simple helper function from the q_vectors to go through the entire list. Signed-off-by: Alexander Duyck <[email protected]> Signed-off-by: Jesse Brandeburg <[email protected]> Tested-by: Kavindya Deegala <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
2013-10-09i40e: Split bytes and packets from Rx/Tx statsAlexander Duyck1-6/+6
This makes it so that the Tx and Rx byte and packet counts are separated from the rest of the statistics. This allows for better isolation of these stats when we move them into the 64 bit statistics. Simplify things by re-ordering how the stats display in ethtool. Instead of displaying all of the Tx queues as a block, followed by all the Rx queues, the new order is Tx[0], Rx[0], Tx[1], Rx[1], ..., Tx[n], Rx[n]. This reduces the loops and cleans up the display for testing purposes since it is very easy to verify if flow director is doing the right thing as the Tx and Rx queue pair are shown in pairs. Signed-off-by: Alexander Duyck <[email protected]> Signed-off-by: Jesse Brandeburg <[email protected]> Tested-by: Kavindya Deegala <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
2013-10-09i40e: Add support for Tx byte queue limitsAlexander Duyck1-0/+15
Implement BQL (byte queue limit) support in i40e. Signed-off-by: Alexander Duyck <[email protected]> Signed-off-by: Jesse Brandeburg <[email protected]> Tested-by: Kavindya Deegala <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
2013-10-09i40e: Drop dead code and flags from Tx hotpathAlexander Duyck1-26/+5
Drop Tx flag and TXSW which is tested but never set. As a result of this change we can drop a complicated check that always resulted in the final result of i40e_tx_csum being equal to the CHECKSUM_PARTIAL value. As such we can replace the entire function call with just a check for skb->summed == CHECKSUM_PARTIAL. Signed-off-by: Alexander Duyck <[email protected]> Signed-off-by: Jesse Brandeburg <[email protected]> Tested-by: Kavindya Deegala <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
2013-10-09i40e: clean up Tx fast pathAlexander Duyck1-98/+122
Sync the fast path for i40e_tx_map and i40e_clean_tx_irq so that they are similar to igb and ixgbe. - Only update the Tx descriptor ring in tx_map - Make skb mapping always on the first buffer in the chain - Drop the use of MAPPED_AS_PAGE Tx flag - Only store flags on the first buffer_info structure Signed-off-by: Alexander Duyck <[email protected]> Signed-off-by: Jesse Brandeburg <[email protected]> Tested-by: Kavindya Deegala <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
2013-10-09i40e: Do not directly increment Tx next_to_useAlexander Duyck1-21/+25
Avoid directly incrementing next_to_use for multiple reasons. The main reason being that if we directly increment it then it can attain a state where it is equal to the ring count. Technically this is a state it should not be able to reach but the way this is written it now can. This patch pulls the value off into a register and then increments it and writes back either the value or 0 depending on if the value is equal to the ring count. Signed-off-by: Alexander Duyck <[email protected]> Signed-off-by: Jesse Brandeburg <[email protected]> Tested-by: Kavindya Deegala <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
2013-10-09i40e: Cleanup Tx buffer info layoutAlexander Duyck1-8/+8
- drop the mapped_as_page u8 from the Tx buffer info as it was unused - use the DMA unmap accessors for Tx DMA - replace checks of DMA with checks of the unmap length to verify if an unmap is needed - update the Tx buffer layout to make it consistent with igb, ixgbe Signed-off-by: Alexander Duyck <[email protected]> Signed-off-by: Jesse Brandeburg <[email protected]> Tested-by: Kavindya Deegala <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
2013-10-09i40e: Drop unused completed statAlexander Duyck1-2/+1
The Tx "completed" stat was part of the original rewrite for detecting Tx hangs. However some time ago in ixgbe I determined that we could just use the packets stat instead. Since then this stat was removed from ixgbe and it serves no purpose in i40e so it can be dropped. Signed-off-by: Alexander Duyck <[email protected]> Signed-off-by: Jesse Brandeburg <[email protected]> Tested-by: Kavindya Deegala <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
2013-09-11i40e: transmit, receive, and NAPIJesse Brandeburg1-0/+1817
This patch contains the transmit, receive, and NAPI routines, as well as ancillary routines. This file is code that is (will be) used by both the VF and PF drivers. Signed-off-by: Jesse Brandeburg <[email protected]> Signed-off-by: Shannon Nelson <[email protected]> CC: PJ Waskiewicz <[email protected]> CC: [email protected] Tested-by: Kavindya Deegala <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]>
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