[Minios-devel] [UNIKRAFT PATCH RFC 08/23] plat/pci_ecam: Introduce pci/pci_ecam.h

[Jia He <justin.he@xxxxxxx>]

On arm64. we use a special generic pci controller, currently it
supports ECAM mode only on arm64 kvm plat.

Signed-off-by: Jia He <justin.he@xxxxxxx>
---
 plat/common/include/pci/pci_ecam.h | 101 +++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 plat/common/include/pci/pci_ecam.h

diff --git a/plat/common/include/pci/pci_ecam.h 
b/plat/common/include/pci/pci_ecam.h
new file mode 100644
index 00000000..f325a141
--- /dev/null
+++ b/plat/common/include/pci/pci_ecam.h
@@ -0,0 +1,101 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+/*
+ * Authors: Jia He <justin.he@xxxxxxx>
+ *
+ * Copyright (c) 2020, Arm Ltd. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holder nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * THIS HEADER MAY NOT BE EXTRACTED OR MODIFIED IN ANY WAY.
+ */
+
+
+#ifndef _PCI_ECAM_H
+#define _PCI_ECAM_H
+
+#include <uk/arch/types.h>
+#include <uk/list.h>
+#include <pci/pci_bus.h>
+#include <platform_bus.h>
+
+/*
+ * struct to hold bus shift of the config window
+ * for a PCI controller.
+ */
+struct pci_ecam_ops {
+       unsigned int                    bus_shift;
+};
+
+/*
+ * struct to hold the mappings of a config space window. This
+ * is expected to be used for PCI controllers that
+ * use ECAM.
+ */
+struct bus_range {
+       __u8                    bus_start;
+       __u8                    bus_end;
+};
+
+struct pci_config_window {
+       __phys_addr             config_base;
+       __u64                   config_space_size;
+       struct bus_range br;
+       struct pci_ecam_ops             *ops;
+       __phys_addr             pci_device_base;
+       __u64                   pci_device_limit;
+};
+
+struct fdt_phandle_args {
+       int np;
+       int args_count;
+       uint32_t args[16];
+};
+
+/*
+ * IO resources have these defined flags.
+ *
+ * PCI devices expose these flags to userspace in the "resource" sysfs file,
+ * so don't move them.
+ */
+#define IORESOURCE_BITS                0x000000ff      /* Bus-specific bits */
+
+#define IORESOURCE_TYPE_BITS   0x00001f00      /* Resource type */
+#define IORESOURCE_IO          0x00000100      /* PCI/ISA I/O ports */
+#define IORESOURCE_MEM         0x00000200
+#define IORESOURCE_REG         0x00000300      /* Register offsets */
+#define IORESOURCE_IRQ         0x00000400
+#define IORESOURCE_DMA         0x00000800
+#define IORESOURCE_BUS         0x00001000
+
+
+int pci_generic_config_read(__u8 bus, __u8 devfn,
+                           int where, int size, __u32 *val);
+
+int pci_generic_config_write(__u8 bus, __u8 devfn,
+                            int where, int size, __u32 val);
+
+extern struct pf_driver gen_pci_driver;
+#endif
-- 
2.17.1


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