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https://github.com/brain-hackers/u-boot-brain
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sandbox: pci: Remember the device being emulated
Add a field to the PCI emulator per-device data which records which device is being emulated. This is useful when the emulator needs to check the device for something. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Bin Meng <bmeng.cn@gmail.com> [bmeng: rebase the patch against u-boot-x86/master to get it applied cleanly] Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
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@ -18,6 +18,7 @@ struct sandbox_pci_emul_priv {
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int sandbox_pci_get_emul(struct udevice *bus, pci_dev_t find_devfn,
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struct udevice **containerp, struct udevice **emulp)
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{
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struct pci_emul_uc_priv *upriv;
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struct udevice *dev;
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int ret;
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@ -30,16 +31,32 @@ int sandbox_pci_get_emul(struct udevice *bus, pci_dev_t find_devfn,
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}
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*containerp = dev;
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/*
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* See commit 4345998ae9df,
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* "pci: sandbox: Support dynamically binding device driver"
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*/
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ret = uclass_get_device_by_phandle(UCLASS_PCI_EMUL, dev, "sandbox,emul",
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emulp);
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if (ret && device_get_uclass_id(dev) != UCLASS_PCI_GENERIC)
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*emulp = dev;
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if (!ret) {
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upriv = dev_get_uclass_priv(*emulp);
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return *emulp ? 0 : -ENODEV;
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upriv->client = dev;
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} else if (device_get_uclass_id(dev) != UCLASS_PCI_GENERIC) {
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/*
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* See commit 4345998ae9df,
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* "pci: sandbox: Support dynamically binding device driver"
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*/
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*emulp = dev;
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}
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return 0;
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}
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int sandbox_pci_get_client(struct udevice *emul, struct udevice **devp)
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{
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struct pci_emul_uc_priv *upriv = dev_get_uclass_priv(emul);
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if (!upriv->client)
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return -ENOENT;
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*devp = upriv->client;
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return 0;
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}
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uint sandbox_pci_read_bar(u32 barval, int type, uint size)
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@ -88,6 +105,7 @@ UCLASS_DRIVER(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_emul_priv),
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.per_device_auto_alloc_size = sizeof(struct pci_emul_uc_priv),
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};
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/*
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@ -1490,6 +1490,17 @@ int dm_pci_find_device(unsigned int vendor, unsigned int device, int index,
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*/
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int dm_pci_find_class(uint find_class, int index, struct udevice **devp);
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/**
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* struct pci_emul_uc_priv - holds info about an emulator device
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*
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* There is always at most one emulator per client
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*
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* @client: Client device if any, else NULL
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*/
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struct pci_emul_uc_priv {
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struct udevice *client;
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};
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/**
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* struct dm_pci_emul_ops - PCI device emulator operations
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*/
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@ -1592,6 +1603,15 @@ struct dm_pci_emul_ops {
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int sandbox_pci_get_emul(struct udevice *bus, pci_dev_t find_devfn,
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struct udevice **containerp, struct udevice **emulp);
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/**
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* sandbox_pci_get_client() - Find the client for an emulation device
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*
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* @emul: Emulation device to check
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* @devp: Returns the client device emulated by this device
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* @return 0 if OK, -ENOENT if the device has no client yet
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*/
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int sandbox_pci_get_client(struct udevice *emul, struct udevice **devp);
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/**
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* pci_get_devfn() - Extract the devfn from fdt_pci_addr of the device
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*
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