Since sandbox does not have real devices (unless it borrows those from the host) it must use emulations. Provide a uclass which permits PCI operations to be passed through to an emulation device. Signed-off-by: Simon Glass <sjg@chromium.org>master
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/*
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* Copyright (c) 2014 Google, Inc |
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* Written by Simon Glass <sjg@chromium.org> |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#include <common.h> |
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#include <dm.h> |
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#include <fdtdec.h> |
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#include <libfdt.h> |
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#include <pci.h> |
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#include <dm/lists.h> |
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DECLARE_GLOBAL_DATA_PTR; |
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struct sandbox_pci_priv { |
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int dev_count; |
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}; |
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int sandbox_pci_get_emul(struct udevice *bus, pci_dev_t find_devfn, |
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struct udevice **emulp) |
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{ |
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struct udevice *dev; |
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int ret; |
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ret = pci_bus_find_devfn(bus, find_devfn, &dev); |
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if (ret) { |
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debug("%s: Could not find emulator for dev %x\n", __func__, |
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find_devfn); |
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return ret; |
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} |
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ret = device_find_first_child(dev, emulp); |
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if (ret) |
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return ret; |
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return *emulp ? 0 : -ENODEV; |
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} |
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static int sandbox_pci_emul_post_probe(struct udevice *dev) |
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{ |
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struct sandbox_pci_priv *priv = dev->uclass->priv; |
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priv->dev_count++; |
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sandbox_set_enable_pci_map(true); |
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return 0; |
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} |
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static int sandbox_pci_emul_pre_remove(struct udevice *dev) |
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{ |
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struct sandbox_pci_priv *priv = dev->uclass->priv; |
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priv->dev_count--; |
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sandbox_set_enable_pci_map(priv->dev_count > 0); |
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return 0; |
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} |
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UCLASS_DRIVER(pci_emul) = { |
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.id = UCLASS_PCI_EMUL, |
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.name = "pci_emul", |
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.post_probe = sandbox_pci_emul_post_probe, |
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.pre_remove = sandbox_pci_emul_pre_remove, |
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.priv_auto_alloc_size = sizeof(struct sandbox_pci_priv), |
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}; |
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