fbec776de0
- Remove the complex mechanism to choose between using busdma and raw pmap_kextract at runtime. The reduced complexity makes the code easier to read and maintain. - Fix a bug in the small packet receive path where clusters were repeatedly mapped but never unmapped. We now store the cluster's bus address and avoid re-mapping the cluster each time a small packet is received. This patch fixes bugs I've seen where ixl(4) will not even respond to ping without seeing DMAR faults. I see a small improvement (14%) on packet forwarding tests using a Haswell based Xeon E5-2697 v3. Olivier sees a small regression (-3% to -6%) with lower end hardware. Reviewed by: mmacy Not objected to by: sbruno MFC after: 8 weeks Sponsored by: Netflix, Inc Differential Revision: https://reviews.freebsd.org/D17901
77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
/*-
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* Copyright (c) 2018, Matthew Macy (mmacy@freebsd.org)
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Neither the name of Matthew Macy nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef __NET_IFLIB_PRIVATE_H_
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#define __NET_IFLIB_PRIVATE_H_
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#define IFC_LEGACY 0x001
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#define IFC_QFLUSH 0x002
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#define IFC_MULTISEG 0x004
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#define IFC_SPARE1 0x008
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#define IFC_SC_ALLOCATED 0x010
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#define IFC_INIT_DONE 0x020
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#define IFC_PREFETCH 0x040
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#define IFC_DO_RESET 0x080
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#define IFC_DO_WATCHDOG 0x100
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#define IFC_CHECK_HUNG 0x200
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#define IFC_PSEUDO 0x400
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#define IFC_IN_DETACH 0x800
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#define IFC_NETMAP_TX_IRQ 0x80000000
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MALLOC_DECLARE(M_IFLIB);
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#define IFLIB_MAX_TX_BYTES (2*1024*1024)
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#define IFLIB_MIN_TX_BYTES (8*1024)
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#define IFLIB_DEFAULT_TX_QDEPTH 2048
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struct iflib_cloneattach_ctx {
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struct if_clone *cc_ifc;
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caddr_t cc_params;
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const char *cc_name;
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int cc_len;
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};
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extern driver_t iflib_pseudodriver;
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int noop_attach(device_t dev);
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int iflib_pseudo_detach(device_t dev);
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int iflib_pseudo_register(device_t dev, if_shared_ctx_t sctx, if_ctx_t *ctxp,
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struct iflib_cloneattach_ctx *clctx);
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int iflib_pseudo_deregister(if_ctx_t ctx);
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uint32_t iflib_get_flags(if_ctx_t ctx);
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void iflib_set_detach(if_ctx_t ctx);
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void iflib_stop(if_ctx_t ctx);
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#endif
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