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 ---
Changes in v3: - Added more description to commit message and kmsg - Removed some unused functionality that can't be tested. - Removed entries from sandbox config and added implies and select to arch/Kconfig sandbox entry.
arch/Kconfig | 2 + arch/sandbox/dts/test.dts | 4 + drivers/pci_endpoint/Kconfig | 9 ++ drivers/pci_endpoint/Makefile | 1 + drivers/pci_endpoint/sandbox-pci_ep.c | 182 ++++++++++++++++++++++++++ 5 files changed, 198 insertions(+) create mode 100644 drivers/pci_endpoint/sandbox-pci_ep.c
diff --git a/arch/Kconfig b/arch/Kconfig index 2f3d07c13a..379255c12c 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -89,6 +89,7 @@ config SANDBOX select DM_SPI_FLASH select HAVE_BLOCK_DEVICE select LZO + select PCI_ENDPOINT select SPI select SUPPORT_OF_CONTROL imply BITREVERSE @@ -118,6 +119,7 @@ config SANDBOX imply VIRTIO_BLK imply VIRTIO_NET imply DM_SOUND + imply PCI_SANDBOX_EP imply PCH
config SH diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts index 8b2d6451c6..001dc302ed 100644 --- a/arch/sandbox/dts/test.dts +++ b/arch/sandbox/dts/test.dts @@ -475,6 +475,10 @@ }; };
+ pci_ep: pci_ep { + compatible = "sandbox,pci_ep"; + }; + probing { compatible = "simple-bus"; test1 { diff --git a/drivers/pci_endpoint/Kconfig b/drivers/pci_endpoint/Kconfig index e00cb75b8e..19cfa0aafb 100644 --- a/drivers/pci_endpoint/Kconfig +++ b/drivers/pci_endpoint/Kconfig @@ -22,4 +22,13 @@ config PCIE_CADENCE_EP endpoint mode. This PCIe controller may be embedded into many different vendors SoCs.
+config PCI_SANDBOX_EP + bool "Sandbox PCIe endpoint controller" + depends on PCI_ENDPOINT + help + Say Y here if you want to support the Sandbox PCIe controller in + endpoint mode. + The sandbox driver act as a dummy driver which stores and + retrieves PCIe endpoint configuration as is. + endmenu diff --git a/drivers/pci_endpoint/Makefile b/drivers/pci_endpoint/Makefile index 0a849deb19..3cd987259d 100644 --- a/drivers/pci_endpoint/Makefile +++ b/drivers/pci_endpoint/Makefile @@ -5,3 +5,4 @@
obj-y += pci_ep-uclass.o obj-$(CONFIG_PCIE_CADENCE_EP) += pcie-cadence-ep.o +obj-$(CONFIG_PCI_SANDBOX_EP) += sandbox-pci_ep.o diff --git a/drivers/pci_endpoint/sandbox-pci_ep.c b/drivers/pci_endpoint/sandbox-pci_ep.c new file mode 100644 index 0000000000..0258433d8f --- /dev/null +++ b/drivers/pci_endpoint/sandbox-pci_ep.c @@ -0,0 +1,182 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2019 Ramon Fried ramon.fried@gmail.com + */ + +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <pci.h> +#include <pci_ep.h> +#include <asm/test.h> + +/** + * struct sandbox_pci_ep_priv - private data for driver + * @hdr: Stores the EP device header + * @msix: required MSIx count; + * @msi: required MSI count; + */ +struct sandbox_pci_ep_priv { + struct pci_ep_header hdr; + struct pci_bar bars[6]; + int msix; + int msi; + int irq_count; +}; + +/* Method exported for testing purposes */ +int sandbox_get_pci_ep_irq_count(struct udevice *dev) +{ + struct sandbox_pci_ep_priv *priv = dev_get_priv(dev); + + return priv->irq_count; +} + +static const struct udevice_id sandbox_pci_ep_ids[] = { + { .compatible = "sandbox,pci_ep" }, + { } +}; + +static int sandbox_write_header(struct udevice *dev, uint fn, + struct pci_ep_header *hdr) +{ + struct sandbox_pci_ep_priv *priv = dev_get_priv(dev); + + if (fn > 0) + return -ENODEV; + + memcpy(&priv->hdr, hdr, sizeof(*hdr)); + + return 0; +} + +static int sandbox_read_header(struct udevice *dev, uint fn, + struct pci_ep_header *hdr) +{ + struct sandbox_pci_ep_priv *priv = dev_get_priv(dev); + + if (fn > 0) + return -ENODEV; + + memcpy(hdr, &priv->hdr, sizeof(*hdr)); + + return 0; +} + +static int sandbox_set_bar(struct udevice *dev, uint fn, + struct pci_bar *ep_bar) +{ + struct sandbox_pci_ep_priv *priv = dev_get_priv(dev); + int bar_idx; + + if (fn > 0) + return -ENODEV; + + bar_idx = ep_bar->barno; + + memcpy(&priv->bars[bar_idx], ep_bar, sizeof(*ep_bar)); + + return 0; +} + +static int sandbox_read_bar(struct udevice *dev, uint fn, + struct pci_bar *ep_bar, enum pci_barno barno) +{ + struct sandbox_pci_ep_priv *priv = dev_get_priv(dev); + int bar_idx; + + if (fn > 0) + return -ENODEV; + + bar_idx = ep_bar->barno; + + memcpy(ep_bar, &priv->bars[bar_idx], sizeof(*ep_bar)); + + return 0; +} + +static int sandbox_set_msi(struct udevice *dev, uint fn, uint interrupts) +{ + struct sandbox_pci_ep_priv *priv = dev_get_priv(dev); + + if (fn > 0) + return -ENODEV; + + priv->msi = interrupts; + + return 0; +} + +static int sandbox_get_msi(struct udevice *dev, uint fn) +{ + struct sandbox_pci_ep_priv *priv = dev_get_priv(dev); + + if (fn > 0) + return -ENODEV; + + return priv->msi; +} + +static int sandbox_set_msix(struct udevice *dev, uint fn, uint interrupts) +{ + struct sandbox_pci_ep_priv *priv = dev_get_priv(dev); + + if (fn > 0) + return -ENODEV; + + priv->msix = interrupts; + + return 0; +} + +static int sandbox_get_msix(struct udevice *dev, uint fn) +{ + struct sandbox_pci_ep_priv *priv = dev_get_priv(dev); + + if (fn > 0) + return -ENODEV; + + return priv->msix; +} + +static int sandbox_raise_irq(struct udevice *dev, uint fn, + enum pci_ep_irq_type type, uint interrupt_num) +{ + struct sandbox_pci_ep_priv *priv = dev_get_priv(dev); + + if (fn > 0) + return -ENODEV; + + priv->irq_count++; + + return 0; +} + +static int sandbox_pci_ep_probe(struct udevice *dev) +{ + struct sandbox_pci_ep_priv *priv = dev_get_priv(dev); + + memset(priv, 0, sizeof(*priv)); + return 0; +} + +static struct pci_ep_ops sandbox_pci_ep_ops = { + .write_header = sandbox_write_header, + .read_header = sandbox_read_header, + .set_bar = sandbox_set_bar, + .read_bar = sandbox_read_bar, + .set_msi = sandbox_set_msi, + .get_msi = sandbox_get_msi, + .set_msix = sandbox_set_msix, + .get_msix = sandbox_get_msix, + .raise_irq = sandbox_raise_irq, +}; + +U_BOOT_DRIVER(pci_ep_sandbox) = { + .name = "pci_ep_sandbox", + .id = UCLASS_PCI_EP, + .of_match = sandbox_pci_ep_ids, + .probe = sandbox_pci_ep_probe, + .ops = &sandbox_pci_ep_ops, + .priv_auto_alloc_size = sizeof(struct sandbox_pci_ep_priv), +};