On 11/23/2016 7:49 AM, Andrew Rybchenko wrote: > On 11/23/2016 03:02 AM, Ferruh Yigit wrote: >> On 11/21/2016 3:00 PM, Andrew Rybchenko wrote: >>> The patch series adds Solarflare libefx-based network PMD. >>> >>> This version of the driver supports Solarflare SFN7xxx and SFN8xxx >>> families of 10/40 Gbps adapters. >>> >>> libefx is a platform-independent library to implement drivers for >>> Solarflare network adapters. It provides unified adapter family >>> independent interface (if possible). FreeBSD [1] and illumos [2] >>> drivers are built on top of the library. >>> >>> The patch series could be logically structured into 5 sub-series: >>> 1. (1) add the driver skeleton including documentation >>> 2. (2-30) import libefx and include it in build with the latest patch >>> 3. (31-43) implement minimal device level operations in steps >>> 4. (44-51) implement Rx subsystem >>> 5. (52-56) implement Tx subsystem >>> >>> Functional driver with multi-queue support capable to send and receive >>> traffic appears with the last patch in the series. >>> >>> The following design decisions are made during development: >>> >>> 1. Since libefx uses positive errno return codes, positive errno >>> return codes are used inside the driver and coversion to negative >>> is done on return from eth_dev_ops callbacks. We think that it >>> is the less error-prone way. >>> >>> 2. Another Solarflare PMD with in-kernel part (for control operations) >>> is considered and could be added in the future. Code for data path >>> should be shared by these two drivers. libefx-based PMD is put into >>> 'efx' subdirectory to have a space for another PMD and shared code. >>> >>> 3. Own event queue (a way to deliver events from HW to host CPU) is >>> used for house-keeping (e.g. link status notifications), each Tx >>> and each Rx queue. No locks on datapath are requires in this case. >>> >>> 4. Alarm is used to periodically poll house-keeping event queue. >>> The event queue is used to deliver link status change notifications, >>> Rx/Tx queue flush events, SRAM events. It is not used on datapath. >>> The event queue polling is protected using spin-lock since >>> concurrent access from different contexts is possible (e.g. device >>> stop when polling alarm is running). >>> >>> [1] https://svnweb.freebsd.org/base/head/sys/dev/sfxge/common/ >>> [2] >>> https://github.com/illumos/illumos-gate/tree/master/usr/src/uts/common/io/sfxge/common/ >>> >>> --- >>> >>> Andrew Rybchenko (49): >>> net/sfc: libefx-based PMD stub sufficient to build and init >>> net/sfc: import libefx base >>> net/sfc: import libefx register definitions >>> net/sfc: import libefx filters support >>> net/sfc: import libefx MCDI definition >>> net/sfc: import libefx MCDI implementation >>> net/sfc: import libefx MCDI logging support >>> net/sfc: import libefx MCDI proxy authorization support >>> net/sfc: import libefx 5xxx/6xxx family support >>> net/sfc: import libefx SFN7xxx family support >>> net/sfc: import libefx SFN8xxx family support >>> net/sfc: import libefx diagnostics support >>> net/sfc: import libefx built-in selftest support >>> net/sfc: import libefx software per-queue statistics support >>> net/sfc: import libefx PHY flags control support >>> net/sfc: import libefx PHY statistics support >>> net/sfc: import libefx PHY LEDs control support >>> net/sfc: import libefx MAC statistics support >>> net/sfc: import libefx event prefetch support >>> net/sfc: import libefx Rx scatter support >>> net/sfc: import libefx RSS support >>> net/sfc: import libefx loopback control support >>> net/sfc: import libefx monitors statistics support >>> net/sfc: import libefx support to access monitors via MCDI >>> net/sfc: import libefx support for Rx packed stream mode >>> net/sfc: import libefx NVRAM support >>> net/sfc: import libefx VPD support >>> net/sfc: import libefx bootrom configuration support >>> net/sfc: import libefx licensing support >>> net/sfc: implement dummy callback to get device information >>> net/sfc: implement driver operation to init device on attach >>> net/sfc: add device configure and close stubs >>> net/sfc: add device configuration checks >>> net/sfc: implement device start and stop operations >>> net/sfc: make available resources estimation and allocation >>> net/sfc: interrupts support sufficient for event queue init >>> net/sfc: implement event queue support >>> net/sfc: implement EVQ dummy exception handling >>> net/sfc: maintain management event queue >>> net/sfc: periodic management EVQ polling using alarm >>> net/sfc: minimum port control sufficient to receive traffic >>> net/sfc: implement Rx subsystem stubs >>> net/sfc: check configured rxmode >>> net/sfc: implement Rx queue setup release operations >>> net/sfc: calculate Rx buffer size which may be used >>> net/sfc: validate Rx queue buffers setup >>> net/sfc: implement Rx queue start and stop operations >>> net/sfc: implement device callback to Rx burst of packets >>> net/sfc: discard scattered packet on Rx correctly >>> >>> Artem Andreev (2): >>> net/sfc: include libefx in build >>> net/sfc: implement device operation to retrieve link info >>> >>> Ivan Malov (5): >>> net/sfc: provide basic stubs for Tx subsystem >>> net/sfc: add function to check configured Tx mode >>> net/sfc: add callbacks to set up and release Tx queues >>> net/sfc: implement transmit path start / stop >>> net/sfc: add callback to send bursts of packets >>> >> Hi Andrew, >> >> Thank you for the patch, I have encounter with a few minor issues, can >> you please check them [1]? >> >> Also folder structure is drivers/net/sfc/efx/<all_src_files>, why /sfc/ >> layer is created? >> sfc is company name (solarflare communications), right? Other driver >> folders not structured based on company, what about using >> drivers/net/efx/* ? > > I've tried to explain it above in item (2): > > >>> > > 2. Another Solarflare PMD with in-kernel part (for control operations) > is considered and could be added in the future. Code for data path > should be shared by these two drivers. libefx-based PMD is put into > 'efx' subdirectory to have a space for another PMD and shared code. > > <<< > > So, main reason is to have location for the code shared by two Solarflare > network PMDs. May be it better to relocate when we really have it. > I'm open for other ideas/suggestions.
If there will be another PMD that shares code with current one, the logic seems good, but I am not sure about start using company names, I am not against it, just I don't know. Let's relocate later, this buys some time to think / get feedback on issue. > >> [1]: >> 1- There are a few (non-base) checkpatch warnings, can you please check >> patch 36, 49, 50 and 55 please? > > Thanks, I'll fix spelling in v2. > 36, 49 and 55 also ask to check multiple assignments. IMHO, it is the > right usage > of multiple assignment when logically bound variables must have the same > value. > >> 2- Got following compile issues, not investigated, directly sharing here: >> >> b) for icc getting following warnings: >> ======================================= >> icc: command line warning #10006: ignoring unknown option '-Wno-empty-body' >> icc: command line warning #10006: ignoring unknown option >> '-Waggregate-return' >> icc: command line warning #10006: ignoring unknown option >> '-Wbad-function-cast' >> icc: command line warning #10006: ignoring unknown option '-Wnested-externs' >> >> >> c) icc compiler errors: >> ======================================= >> In file included from >> .../x86_64-native-linuxapp-icc/include/rte_ethdev.h(185), >> from .../drivers/net/sfc/efx/sfc.h(35), >> from .../drivers/net/sfc/efx/sfc.c(37): >> .../x86_64-native-linuxapp-icc/include/rte_ether.h(258): warning #2203: >> cast discards qualifiers from target type >> uint16_t *from_words = (uint16_t *)(ea_from->addr_bytes); >> ^ >> >> .../drivers/net/sfc/efx/base/efx_mcdi.c(1157): warning #3179: deprecated >> conversion of string literal to char* (should be const char*) >> .../drivers/net/sfc/efx/base/ef10_filter.c(1276): warning #188: >> enumerated type mixed with another type >> : "unknown assertion"; >> ^ >> >> filter_flags = 0; >> ^ >> >> .../drivers/net/sfc/efx/base/efx_mcdi.c(1426): warning #188: enumerated >> type mixed with another type >> epp->ep_fixed_port_type = >> ^ >> >> .../drivers/net/sfc/efx/base/efx_nic.c(556): warning #188: enumerated >> type mixed with another type >> enp->en_family = 0; > > Yes, I have no ICC compilers. I'll try to fix these warnings, but I > can't be sure without checking it. > Also we cannot claim ICC supported without building and testing the > generated binary. Please update the code at least to not break the icc compilation, specially since this PMD will be default enabled. If you prefer I can verify compilation offline before you send the patchset. > > Many thanks, > Andrew. >