Re: [PATCH v2 0/3] PPC: Fix -Wimplicit-fallthrough for clang

Nick, On Tue, Nov 17, 2020 at 04:07:48PM -0800, Nick Desaulniers wrote: > While cleaning up the last few -Wimplicit-fallthrough warnings in tree > for Clang, I noticed > commit 6a9dc5fd6170d ("lib: Revert use of fallthrough pseudo-keyword in lib/") > which seemed to undo a bunch of fixes in lib/

[PATCH net-next v2 0/9] ibmvnic: Performance improvements and other updates

The first three patches utilize a hypervisor call allowing multiple TX and RX buffer replenishment descriptors to be sent in one operation, which significantly reduces hypervisor call overhead. The xmit_more and Byte Queue Limit API's are leveraged to provide this support for TX descriptors. The

[PATCH net-next v2 6/9] ibmvnic: Ensure that device queue memory is cache-line aligned

From: "Dwip N. Banerjee" PCI bus slowdowns were observed on IBM VNIC devices as a result of partial cache line writes and non-cache aligned full cache line writes. Ensure that packet data buffers are cache-line aligned to avoid these slowdowns. Signed-off-by: Dwip N. Banerjee ---

[PATCH net-next v2 8/9] ibmvnic: Use netdev_alloc_skb instead of alloc_skb to replenish RX buffers

From: "Dwip N. Banerjee" Take advantage of the additional optimizations in netdev_alloc_skb when allocating socket buffers to be used for packet reception. Signed-off-by: Dwip N. Banerjee --- drivers/net/ethernet/ibm/ibmvnic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git

[PATCH 1/2] powerpc: sstep: Fix load and update instructions

The Power ISA says that the fixed-point load and update instructions must neither use R0 for the base address (RA) nor have the destination (RT) and the base address (RA) as the same register. In these cases, the instruction is invalid. This applies to the following instructions. * Load Byte and

[PATCH net-next v2 4/9] ibmvnic: Clean up TX code and TX buffer data structure

Remove unused and superfluous code and members in existing TX implementation and data structures. Signed-off-by: Thomas Falcon --- drivers/net/ethernet/ibm/ibmvnic.c | 31 +++--- drivers/net/ethernet/ibm/ibmvnic.h | 8 2 files changed, 11 insertions(+), 28

[PATCH net-next v2 9/9] ibmvnic: Do not replenish RX buffers after every polling loop

From: "Dwip N. Banerjee" Reduce the amount of time spent replenishing RX buffers by only doing so once available buffers has fallen under a certain threshold, in this case half of the total number of buffers, or if the polling loop exits before the packets processed is less than its budget.

[PATCH 2/2] powerpc: sstep: Fix store and update instructions

The Power ISA says that the fixed-point store and update instructions must not use R0 for the base address (RA). In this case, the instruction is invalid. This applies to the following instructions. * Store Byte with Update (stbu) * Store Byte with Update Indexed (stbux) * Store Halfword

[powerpc:next-test] BUILD SUCCESS a1062188413df416db21b02ffe4bd60228ad6240

allmodconfig powerpc allyesconfig powerpc allmodconfig powerpc allnoconfig x86_64 randconfig-a005-20201118 x86_64 randconfig-a003-20201118 x86_64 randconfig-a004

[PATCH net-next v2 5/9] ibmvnic: Remove send_subcrq function

It is not longer used, so remove it. Signed-off-by: Thomas Falcon --- drivers/net/ethernet/ibm/ibmvnic.c | 34 -- 1 file changed, 34 deletions(-) diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index 2aace693559f..e9b0cb6dfd9d

[powerpc:fixes] BUILD SUCCESS cd81acc600a9684ea4b4d25a47900d38a3890eab

allmodconfig powerpc allyesconfig powerpc allmodconfig powerpc allnoconfig x86_64 randconfig-a005-20201118 x86_64 randconfig-a003-20201118 x86_64 randconfig-a004-20201118

[PATCH net-next v2 3/9] ibmvnic: Introduce xmit_more support using batched subCRQ hcalls

Include support for the xmit_more feature utilizing the H_SEND_SUB_CRQ_INDIRECT hypervisor call which allows the sending of multiple subordinate Command Response Queue descriptors in one hypervisor call via a DMA-mapped buffer. This update reduces hypervisor calls and thus hypervisor call overhead

[PATCH net-next v2 7/9] ibmvnic: Correctly re-enable interrupts in NAPI polling routine

From: "Dwip N. Banerjee" If the current NAPI polling loop exits without completing it's budget, only re-enable interrupts if there are no entries remaining in the queue and napi_complete_done is successful. If there are entries remaining on the queue that were missed, restart the polling loop.

[PATCH 1/3] powerpc/wrapper: add "-z notext" flag to disable diagnostic

The "-z notext" flag disables reporting an error if DT_TEXTREL is set. ld.lld: error: can't create dynamic relocation R_PPC64_ADDR64 against symbol: _start in readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in the output >>>

[PATCH net-next v2 1/9] ibmvnic: Introduce indirect subordinate Command Response Queue buffer

This patch introduces the infrastructure to send batched subordinate Command Response Queue descriptors, which are used by the ibmvnic driver to send TX frame and RX buffer descriptors. Signed-off-by: Thomas Falcon --- drivers/net/ethernet/ibm/ibmvnic.c | 23 +++

[PATCH net-next v2 2/9] ibmvnic: Introduce batched RX buffer descriptor transmission

Utilize the H_SEND_SUB_CRQ_INDIRECT hypervisor call to send multiple RX buffer descriptors to the device in one hypervisor call operation. This change will reduce the number of hypervisor calls and thus hypervisor call overhead needed to transmit RX buffer descriptors to the device.