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path: root/drivers/net/ethernet/netronome/nfp/nfp_net_debugfs.c
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* nfp: use TX ring pointer write backJakub Kicinski2022-03-211-1/+4
| | | | | | | | | | | | Newer versions of the PCIe microcode support writing back the position of the TX pointer back into host memory. This speeds up TX completions, because we avoid a read from device memory (replacing PCIe read with DMA coherent read). Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Fei Qin <fei.qin@corigine.com> Signed-off-by: Simon Horman <simon.horman@corigine.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: use callbacks for slow path ring related functionsJakub Kicinski2022-03-211-1/+1
| | | | | | | | | | | | | To reduce the coupling of slow path ring implementations and their callers, use callbacks instead. Changes to Jakub's work: * Also use callbacks for xmit functions Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Yinjun Zhang <yinjun.zhang@corigine.com> Signed-off-by: Simon Horman <simon.horman@corigine.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: move the fast path code to separate filesJakub Kicinski2022-03-211-41/+5
| | | | | | | | | | | | | | | | | | | | In preparation for support for a new datapath format move all ring and fast path logic into separate files. It is basically a verbatim move with some wrapping functions, no new structures and functions added. The current data path is called NFD3 from the initial version of the driver ABI it used. The non-fast path, but ring related functions are moved to nfp_net_dp.c file. Changes to Jakub's work: * Rebase on xsk related code. * Split the patch, move the callback changes to next commit. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Fei Qin <fei.qin@corigine.com> Signed-off-by: Simon Horman <simon.horman@corigine.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: xsk: add AF_XDP zero-copy Rx and Tx supportNiklas Söderlund2022-03-041-12/+21
| | | | | | | | | | | | | | | | | | | | | This patch adds zero-copy Rx and Tx support for AF_XDP sockets. It do so by adding a separate NAPI poll function that is attached to a each channel when the XSK socket is attached with XDP_SETUP_XSK_POOL, and restored when the XSK socket is terminated, this is done per channel. Support for XDP_TX is implemented and the XDP buffer can safely be moved from the Rx to the Tx queue and correctly freed and returned to the XSK pool once it's transmitted. Note that when AF_XDP zero-copy is enabled, the XDP action XDP_PASS will allocate a new buffer and copy the zero-copy frame prior passing it to the kernel stack. This patch is based on previous work by Jakub Kicinski. Signed-off-by: Niklas Söderlund <niklas.soderlund@corigine.com> Signed-off-by: Simon Horman <simon.horman@corigine.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: no need to check return value of debugfs_create functionsGreg Kroah-Hartman2019-08-101-16/+1
| | | | | | | | | | | | | | | | | | | | When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. Cc: "David S. Miller" <davem@davemloft.net> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jesper Dangaard Brouer <hawk@kernel.org> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Edwin Peer <edwin.peer@netronome.com> Cc: Yangtao Li <tiny.windzz@gmail.com> Cc: Simon Horman <simon.horman@netronome.com> Cc: oss-drivers@netronome.com Cc: netdev@vger.kernel.org Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: convert to DEFINE_SHOW_ATTRIBUTEYangtao Li2018-12-031-34/+8
| | | | | | | | Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code. Signed-off-by: Yangtao Li <tiny.windzz@gmail.com> Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: replace long license headers with SPDXJakub Kicinski2018-10-111-32/+2
| | | | | | | | | | | | Replace the repeated license text with SDPX identifiers. While at it bump the Copyright dates for files we touched this year. Signed-off-by: Edwin Peer <edwin.peer@netronome.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Nic Viljoen <nick.viljoen@netronome.com> Reviewed-by: Simon Horman <simon.horman@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: assign vNIC id as phys_port_name of vNICs which are not portsJakub Kicinski2018-05-231-2/+2
| | | | | | | | | | | | | | | | | | When NFP is modelled as a switch we assign phys_port_name to respective port(representor )s: vNIC0 - | - PF port (pf%d) MAC/PHY (p%d[s%d]) - |E== In most cases there is only one vNIC for communication with the switch. If there is more than one we need to be able to identify them. Use %d as phys_port_name of the vNICs. We don't have to pass ID to nfp_net_debugfs_vnic_add() separately any more. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* ethernet: Use octal not symbolic permissionsJoe Perches2018-03-261-3/+3
| | | | | | | | | | | | | | Prefer the direct use of octal for permissions. Done with checkpatch -f --types=SYMBOLIC_PERMS --fix-inplace and some typing. Miscellanea: o Whitespace neatening around these conversions. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: don't reuse pointers in ring dumpingJakub Kicinski2017-08-181-6/+7
| | | | | | | | | | | We were reusing skb pointer when reading page frag, since ring entries contain a union of a skb and frag pointer. This can be confusing to people reading the code. Refactor the code to read frag pointer directly. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Simon Horman <simon.horman@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: make sure debug accesses don't depend on netdevsJakub Kicinski2017-06-071-3/+6
| | | | | | | | | | | We want to be able to inspect the state of descriptor rings of the control vNIC, so it will use the same interface as data vNICs. Make sure the code doesn't use netdevs to determine state of the rings and names things appropriately. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: fix print format for ring pointers in ring dumpsJakub Kicinski2017-05-301-2/+2
| | | | | | | | Ring pointers are unsigned. Fix the print formats to avoid showing users negative values. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: rename netdev/port to vNICJakub Kicinski2017-05-221-2/+2
| | | | | | | | | | | | | | | | vNIC is a PCIe-side abstraction NFP firmwares supported by this driver use. It was initially meant to represent a device port and therefore a netdev but today should be thought of as a way of grouping descriptor rings and associated state. Advanced apps will have vNICs without netdevs and ports without a vNIC (using representors instead). Make sure code refers to vNICs as vNICs and not ports or netdevs. No functional changes. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Simon Horman <simon.horman@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: remove RX queue pointersJakub Kicinski2017-03-221-11/+4
| | | | | | | | | | NFP6000 doesn't use queue pointers/doorbells for RX, it uses 'done' bit in descriptors. Remove the pointers from data structures. Since we are saving space in rx_ring structure make fields we previously compressed to 16bits word size again. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: separate data path information from the reset of adapter structureJakub Kicinski2017-03-121-2/+2
| | | | | | | | | | | Move all data path information into a separate structure. This way we will be able to allocate new data path with all new rings etc. and swap it in easily. No functional changes. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: move more ring debug info to debugfsJakub Kicinski2017-03-091-4/+9
| | | | | | | | We already print most of ring configuration including descriptors in debugfs, add the few missing pieces and remove debug prints. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: add port layer to debugfs directoriesJakub Kicinski2017-02-101-12/+27
| | | | | | | | PF driver will support multiple ports per PCI device, add port number to DebugFS paths. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: add XDP support in the driverJakub Kicinski2016-11-041-8/+29
| | | | | | | | | | Add XDP support. Separate stack's and XDP's TX rings logically. Add functions for handling XDP_TX and cleanup of XDP's TX rings. For XDP allocate all RX buffers as separate pages and map them with DMA_BIDIRECTIONAL. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: add support for ethtool .set_channelsJakub Kicinski2016-11-041-2/+2
| | | | | | | | | | Allow changing the number of rings via ethtool .set_channels API. Runtime reconfig needs to be extended to handle number of rings. We need to be able to activate interrupt vectors before rings are assigned to them. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: use alloc_frag() and build_skb()Jakub Kicinski2016-11-011-5/+4
| | | | | | | | | | Speed up RX processing by moving to the alloc_frag()/build_skb() paradigm. Since we're no longer mapping the entire buffer for DMA add helpers which take care of calculating offsets and lengths. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: remove unnecessary staticJakub Kicinski2016-04-161-1/+1
| | | | | | | There is no reason for those local variables to be static. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: check the right pointer for errorsJakub Kicinski2016-04-161-1/+1
| | | | | | | | Correct checking error condition on wrong pointer - copy/paste mistake most likely. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* nfp: allocate ring SW structs dynamicallyJakub Kicinski2016-04-081-8/+12
| | | | | | | | To be able to switch rings more easily on config changes allocate them dynamically, separately from nfp_net structure. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: add driver for Netronome NFP4000/NFP6000 NIC VFsJakub Kicinski2015-12-031-0/+235
Add driver for Virtual Functions for the Netronome's NFP-4000 and NFP-6000 based NICs. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Rolf Neugebauer <rolf.neugebauer@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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