kernel/linux.git/drivers/net/ethernet/ibm, branch v5.19

ibmvnic: Properly dispose of all skbs during a failover.

2022-07-04T10:09:57+00:00

During a reset, there may have been transmits in flight that are no longer valid and cannot be fulfilled. Resetting and clearing the queues is insufficient; each skb also needs to be explicitly freed so that upper levels are not left waiting for confirmation of a transmit that will never happen. If this happens frequently enough, the apparent backlog will cause TCP to begin "congestion control" unnecessarily, culminating in permanently decreased throughput. Fixes: d7c0ef36bde03 ("ibmvnic: Free and re-allocate scrqs when tx/rx scrqs change") Tested-by: Nick Child Reviewed-by: Brian King Signed-off-by: Rick Lindsley Signed-off-by: David S. Miller

eth: switch to netif_napi_add_weight()

2022-05-08T10:33:57+00:00

Switch all Ethernet drivers which use custom napi weights to the new API. Signed-off-by: Jakub Kicinski Signed-off-by: David S. Miller

net: ethernet: Prepare cleanup of powerpc's asm/prom.h

2022-05-05T22:53:02+00:00

powerpc's asm/prom.h includes some headers that it doesn't need itself. In order to clean powerpc's asm/prom.h up in a further step, first clean all files that include asm/prom.h Some files don't need asm/prom.h at all. For those ones, just remove inclusion of asm/prom.h Some files don't need any of the items provided by asm/prom.h, but need some of the headers included by asm/prom.h. For those ones, add the needed headers that are brought by asm/prom.h at the moment and remove asm/prom.h Some files really need asm/prom.h but also need some of the headers included by asm/prom.h. For those one, leave asm/prom.h but also add the needed headers so that they can be removed from asm/prom.h in a later step. Signed-off-by: Christophe Leroy Link: https://lore.kernel.org/r/09a13d592d628de95d30943e59b2170af5b48110.1651663857.git.christophe.leroy@csgroup.eu Signed-off-by: Jakub Kicinski

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2022-04-28T20:02:01+00:00

include/linux/netdevice.h net/core/dev.c 6510ea973d8d ("net: Use this_cpu_inc() to increment net->core_stats") 794c24e9921f ("net-core: rx_otherhost_dropped to core_stats") https://lore.kernel.org/all/20220428111903.5f4304e0@canb.auug.org.au/ drivers/net/wan/cosa.c d48fea8401cf ("net: cosa: fix error check return value of register_chrdev()") 89fbca3307d4 ("net: wan: remove support for COSA and SRP synchronous serial boards") https://lore.kernel.org/all/20220428112130.1f689e5e@canb.auug.org.au/ Signed-off-by: Jakub Kicinski

Revert "ibmvnic: Add ethtool private flag for driver-defined queue limits"

2022-04-28T16:46:18+00:00

This reverts commit 723ad916134784b317b72f3f6cf0f7ba774e5dae When client requests channel or ring size larger than what the server can support the server will cap the request to the supported max. So, the client would not be able to successfully request resources that exceed the server limit. Fixes: 723ad9161347 ("ibmvnic: Add ethtool private flag for driver-defined queue limits") Signed-off-by: Dany Madden Link: https://lore.kernel.org/r/20220427235146.23189-1-drt@linux.ibm.com Signed-off-by: Jakub Kicinski

ibmvnic: Allow multiple ltbs in txpool ltb_set

2022-04-15T21:02:06+00:00

Allow multiple LTBs in the txpool's ltb_set. i.e rather than using a single large LTB, use several smaller LTBs. The first n-1 LTBs will all be of the same size. The size of the last LTB in the set depends on the number of buffers and buffer (mtu) size. This strategy hopefully allows more reuse of the initial LTBs and also reduces the chances of an allocation failure (of the large LTB) when system is low in memory. Suggested-by: Brian King Signed-off-by: Sukadev Bhattiprolu Signed-off-by: Dany Madden Signed-off-by: Jakub Kicinski

ibmvnic: Allow multiple ltbs in rxpool ltb_set

2022-04-15T21:02:05+00:00

Allow multiple LTBs in the rxpool's ltb_set. The first n-1 LTBs will all be of the same size. The size of the last LTB in the set depends on the number of buffers and buffer (mtu) size. Having a set of LTBs per pool provides a couple of benefits. First, with the current value of IBMVNIC_MAX_LTB_SIZE of 16MB, with an MTU of 9000, we need a LTB (DMA buffer) of that size but the allocation can fail in low memory conditions. With a set of LTBs per pool, we can use several smaller (8MB) LTBs and hopefully have fewer allocation failures. (See also comments in ibmvnic.h on the trade-off with smaller LTBs) Second since the kernel limits the size of the DMA buffer to 16MB (based on MAX_ORDER), with a single DMA buffer per pool, the pool is also limited to 16MB. This in turn limits the number of buffers per pool to 1763 when MTU is 9000. With a set of LTBs per pool, we can have upto the max of 4096 buffers per pool even when MTU is 9000. Suggested-by: Brian King Signed-off-by: Sukadev Bhattiprolu Signed-off-by: Dany Madden Signed-off-by: Jakub Kicinski

ibmvnic: convert rxpool ltb to a set of ltbs

2022-04-15T21:02:05+00:00

Define and use interfaces that treat the long term buffer (LTB) of an rxpool as a set of LTBs rather than a single LTB. The set only has one LTB for now. Signed-off-by: Sukadev Bhattiprolu Signed-off-by: Dany Madden Signed-off-by: Jakub Kicinski

ibmvnic: define map_txpool_buf_to_ltb()

2022-04-15T21:02:04+00:00

Define a helper to map a given txpool buffer into its corresponding long term buffer (LTB) and offset. Currently there is just one LTB per txpool so the mapping is trivial. When we add support for multiple LTBs per txpool, this helper will be more useful. Signed-off-by: Sukadev Bhattiprolu Signed-off-by: Dany Madden Signed-off-by: Jakub Kicinski

ibmvnic: define map_rxpool_buf_to_ltb()

2022-04-15T21:02:04+00:00

Define a helper to map a given rx pool buffer into its corresponding long term buffer (LTB) and offset. Currently there is just one LTB per pool so the mapping is trivial. When we add support for multiple LTBs per pool, this helper will be more useful. Signed-off-by: Sukadev Bhattiprolu Signed-off-by: Dany Madden Signed-off-by: Jakub Kicinski