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a19bd79e31
The cxl kernel API has a concept of a default context associated with each PCI device under the virtual PHB. The Mellanox CX4 will also use the cxl kernel API, but it does not use a virtual PHB - rather, the AFU appears as a physical function as a peer to the networking functions. In order to allow the kernel API to work with those networking functions, we will need to associate a default context with them as well. To this end, refactor the corresponding code to do this in vphb.c and export it so that it can be called from the PHB code. Signed-off-by: Ian Munsie <imunsie@au1.ibm.com> Reviewed-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com> Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
45 lines
1.1 KiB
C
45 lines
1.1 KiB
C
/*
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* Copyright 2014-2016 IBM Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/pci.h>
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#include "cxl.h"
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bool _cxl_pci_associate_default_context(struct pci_dev *dev, struct cxl_afu *afu)
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{
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struct cxl_context *ctx;
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/*
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* Allocate a context to do cxl things to. This is used for interrupts
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* in the peer model using a real phb, and if we eventually do DMA ops
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* in the virtual phb, we'll need a default context to attach them to.
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*/
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ctx = cxl_dev_context_init(dev);
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if (!ctx)
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return false;
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dev->dev.archdata.cxl_ctx = ctx;
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return (cxl_ops->afu_check_and_enable(afu) == 0);
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}
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/* exported via cxl_base */
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void _cxl_pci_disable_device(struct pci_dev *dev)
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{
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struct cxl_context *ctx = cxl_get_context(dev);
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if (ctx) {
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if (ctx->status == STARTED) {
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dev_err(&dev->dev, "Default context started\n");
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return;
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}
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dev->dev.archdata.cxl_ctx = NULL;
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cxl_release_context(ctx);
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}
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}
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/* exported via cxl_base */
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