pci_ep-uclass.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* PCI Endpoint uclass
*
* Based on Linux PCI-EP driver written by
* Kishon Vijay Abraham I <kishon@ti.com>
*
* Copyright (c) 2019
* Written by Ramon Fried <ramon.fried@gmail.com>
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <linux/log2.h>
#include <pci_ep.h>
DECLARE_GLOBAL_DATA_PTR;
int pci_ep_write_header(struct udevice *dev, uint fn, struct pci_ep_header *hdr)
{
struct pci_ep_ops *ops = pci_ep_get_ops(dev);
if (!ops->write_header)
return -ENOSYS;
return ops->write_header(dev, fn, hdr);
}
int pci_ep_read_header(struct udevice *dev, uint fn, struct pci_ep_header *hdr)
{
struct pci_ep_ops *ops = pci_ep_get_ops(dev);
if (!ops->read_header)
return -ENOSYS;
return ops->read_header(dev, fn, hdr);
}
int pci_ep_set_bar(struct udevice *dev, uint func_no, struct pci_bar *ep_bar)
{
struct pci_ep_ops *ops = pci_ep_get_ops(dev);
int flags = ep_bar->flags;
/* Some basic bar validity checks */
if (ep_bar->barno > BAR_5 || ep_bar->barno < BAR_0)
return -EINVAL;
if ((ep_bar->barno == BAR_5 &&
(flags & PCI_BASE_ADDRESS_MEM_TYPE_64)) ||
((flags & PCI_BASE_ADDRESS_SPACE_IO) &&
(flags & PCI_BASE_ADDRESS_IO_MASK)) ||
(upper_32_bits(ep_bar->size) &&
!(flags & PCI_BASE_ADDRESS_MEM_TYPE_64)))
return -EINVAL;
if (!ops->set_bar)
return -ENOSYS;
return ops->set_bar(dev, func_no, ep_bar);
}
int pci_ep_read_bar(struct udevice *dev, uint func_no, struct pci_bar *ep_bar,
enum pci_barno barno)
{
struct pci_ep_ops *ops = pci_ep_get_ops(dev);
/* Some basic bar validity checks */
if (barno > BAR_5 || barno < BAR_0)
return -EINVAL;
if (!ops->read_bar)
return -ENOSYS;
return ops->read_bar(dev, func_no, ep_bar, barno);
}
int pci_ep_clear_bar(struct udevice *dev, uint func_num, enum pci_barno bar)
{
struct pci_ep_ops *ops = pci_ep_get_ops(dev);
if (!ops->clear_bar)
return -ENOSYS;
return ops->clear_bar(dev, func_num, bar);
}
int pci_ep_map_addr(struct udevice *dev, uint func_no, phys_addr_t addr,
u64 pci_addr, size_t size)
{
struct pci_ep_ops *ops = pci_ep_get_ops(dev);
if (!ops->map_addr)
return -ENOSYS;
return ops->map_addr(dev, func_no, addr, pci_addr, size);
}
int pci_ep_unmap_addr(struct udevice *dev, uint func_no, phys_addr_t addr)
{
struct pci_ep_ops *ops = pci_ep_get_ops(dev);
if (!ops->unmap_addr)
return -ENOSYS;
return ops->unmap_addr(dev, func_no, addr);
}
int pci_ep_set_msi(struct udevice *dev, uint func_no, uint interrupts)
{
struct pci_ep_ops *ops = pci_ep_get_ops(dev);
uint encode_int;
if (interrupts > 32)
return -EINVAL;
if (!ops->set_msi)
return -ENOSYS;
/* MSI spec permits allocation of
* only 1, 2, 4, 8, 16, 32 interrupts
*/
encode_int = order_base_2(interrupts);
return ops->set_msi(dev, func_no, encode_int);
}
int pci_ep_get_msi(struct udevice *dev, uint func_no)
{
struct pci_ep_ops *ops = pci_ep_get_ops(dev);
int interrupt;
if (!ops->get_msi)
return -ENOSYS;
interrupt = ops->get_msi(dev, func_no);
if (interrupt < 0)
return 0;
/* Translate back from order base 2*/
interrupt = 1 << interrupt;
return interrupt;
}
int pci_ep_set_msix(struct udevice *dev, uint func_no, uint interrupts)
{
struct pci_ep_ops *ops = pci_ep_get_ops(dev);
if (interrupts < 1 || interrupts > 2048)
return -EINVAL;
if (!ops->set_msix)
return -ENOSYS;
return ops->set_msix(dev, func_no, interrupts - 1);
}
int pci_ep_get_msix(struct udevice *dev, uint func_no)
{
struct pci_ep_ops *ops = pci_ep_get_ops(dev);
int interrupt;
if (!ops->get_msix)
return -ENOSYS;
interrupt = ops->get_msix(dev, func_no);
if (interrupt < 0)
return 0;
return interrupt + 1;
}
int pci_ep_raise_irq(struct udevice *dev, uint func_no,
enum pci_ep_irq_type type, uint interrupt_num)
{
struct pci_ep_ops *ops = pci_ep_get_ops(dev);
if (!ops->raise_irq)
return -ENOSYS;
return ops->raise_irq(dev, func_no, type, interrupt_num);
}
int pci_ep_start(struct udevice *dev)
{
struct pci_ep_ops *ops = pci_ep_get_ops(dev);
if (!ops->start)
return -ENOSYS;
return ops->start(dev);
}
int pci_ep_stop(struct udevice *dev)
{
struct pci_ep_ops *ops = pci_ep_get_ops(dev);
if (!ops->stop)
return -ENOSYS;
return ops->stop(dev);
}
UCLASS_DRIVER(pci_ep) = {
.id = UCLASS_PCI_EP,
.name = "pci_ep",
.flags = DM_UC_FLAG_SEQ_ALIAS,
};