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https://github.com/AsahiLinux/u-boot
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bb41333782
Add a dummy PCI endpoint for sandbox. Supporting only a single function, it allows setting and reading header configuration. Signed-off-by: Ramon Fried <ramon.fried@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
182 lines
3.5 KiB
C
182 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2019 Ramon Fried <ramon.fried@gmail.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <pci.h>
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#include <pci_ep.h>
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#include <asm/test.h>
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/**
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* struct sandbox_pci_ep_priv - private data for driver
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* @hdr: Stores the EP device header
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* @msix: required MSIx count;
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* @msi: required MSI count;
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*/
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struct sandbox_pci_ep_priv {
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struct pci_ep_header hdr;
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struct pci_bar bars[6];
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int msix;
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int msi;
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int irq_count;
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};
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/* Method exported for testing purposes */
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int sandbox_get_pci_ep_irq_count(struct udevice *dev)
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{
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struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
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return priv->irq_count;
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}
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static const struct udevice_id sandbox_pci_ep_ids[] = {
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{ .compatible = "sandbox,pci_ep" },
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{ }
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};
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static int sandbox_write_header(struct udevice *dev, uint fn,
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struct pci_ep_header *hdr)
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{
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struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
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if (fn > 0)
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return -ENODEV;
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memcpy(&priv->hdr, hdr, sizeof(*hdr));
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return 0;
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}
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static int sandbox_read_header(struct udevice *dev, uint fn,
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struct pci_ep_header *hdr)
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{
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struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
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if (fn > 0)
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return -ENODEV;
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memcpy(hdr, &priv->hdr, sizeof(*hdr));
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return 0;
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}
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static int sandbox_set_bar(struct udevice *dev, uint fn,
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struct pci_bar *ep_bar)
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{
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struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
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int bar_idx;
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if (fn > 0)
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return -ENODEV;
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bar_idx = ep_bar->barno;
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memcpy(&priv->bars[bar_idx], ep_bar, sizeof(*ep_bar));
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return 0;
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}
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static int sandbox_read_bar(struct udevice *dev, uint fn,
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struct pci_bar *ep_bar, enum pci_barno barno)
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{
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struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
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int bar_idx;
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if (fn > 0)
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return -ENODEV;
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bar_idx = ep_bar->barno;
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memcpy(ep_bar, &priv->bars[bar_idx], sizeof(*ep_bar));
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return 0;
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}
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static int sandbox_set_msi(struct udevice *dev, uint fn, uint interrupts)
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{
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struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
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if (fn > 0)
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return -ENODEV;
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priv->msi = interrupts;
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return 0;
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}
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static int sandbox_get_msi(struct udevice *dev, uint fn)
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{
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struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
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if (fn > 0)
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return -ENODEV;
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return priv->msi;
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}
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static int sandbox_set_msix(struct udevice *dev, uint fn, uint interrupts)
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{
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struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
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if (fn > 0)
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return -ENODEV;
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priv->msix = interrupts;
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return 0;
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}
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static int sandbox_get_msix(struct udevice *dev, uint fn)
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{
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struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
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if (fn > 0)
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return -ENODEV;
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return priv->msix;
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}
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static int sandbox_raise_irq(struct udevice *dev, uint fn,
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enum pci_ep_irq_type type, uint interrupt_num)
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{
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struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
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if (fn > 0)
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return -ENODEV;
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priv->irq_count++;
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return 0;
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}
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static int sandbox_pci_ep_probe(struct udevice *dev)
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{
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struct sandbox_pci_ep_priv *priv = dev_get_priv(dev);
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memset(priv, 0, sizeof(*priv));
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return 0;
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}
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static struct pci_ep_ops sandbox_pci_ep_ops = {
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.write_header = sandbox_write_header,
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.read_header = sandbox_read_header,
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.set_bar = sandbox_set_bar,
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.read_bar = sandbox_read_bar,
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.set_msi = sandbox_set_msi,
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.get_msi = sandbox_get_msi,
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.set_msix = sandbox_set_msix,
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.get_msix = sandbox_get_msix,
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.raise_irq = sandbox_raise_irq,
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};
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U_BOOT_DRIVER(pci_ep_sandbox) = {
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.name = "pci_ep_sandbox",
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.id = UCLASS_PCI_EP,
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.of_match = sandbox_pci_ep_ids,
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.probe = sandbox_pci_ep_probe,
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.ops = &sandbox_pci_ep_ops,
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.priv_auto_alloc_size = sizeof(struct sandbox_pci_ep_priv),
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};
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