kernel: dev: Add PCI driver

Signed-off-by: Ian Moffett <ian@osmora.org>

2 files changed, 110 insertions, 0 deletions

diff --git a/sys/include/dev/pci/pci.h b/sys/include/dev/pci/pci.h
new file mode 100644
index 0000000..c17a08e
--- /dev/null
+++ b/sys/include/dev/pci/pci.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
+ * 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 Hyra 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 OWNER 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.
+ */
+
+#ifndef _DEV_PCI_H_
+#define _DEV_PCI_H_
+
+#include <sys/syscall.h>
+#include <sys/queue.h>
+#include <sys/cdefs.h>
+
+/* Lookup bits */
+#define PCI_DEVICE_ID   __BIT(0)
+#define PCI_VENDOR_ID   __BIT(1)
+#define PCI_CLASS       __BIT(2)
+#define PCI_SUBCLASS    __BIT(3)
+
+/* For PCI lookups */
+struct pci_lookup {
+    uint16_t device_id;
+    uint16_t vendor_id;
+    uint8_t pci_class;
+    uint8_t pci_subclass;
+};
+
+struct pci_device {
+    uint8_t bus;
+    uint8_t slot;
+    uint8_t func;
+
+    uint16_t device_id;
+    uint16_t vendor_id;
+    uint8_t pci_class;
+    uint8_t pci_subclass;
+    uint8_t prog_if;
+    uintptr_t bar[6];
+    uint8_t irq_line;
+    TAILQ_ENTRY(pci_device) link;
+};
+
+int pci_init(void);
+uint32_t pci_readl(struct pci_device *dev, uint32_t offset);
+struct pci_device *pci_get_device(struct pci_lookup lookup, uint16_t lookup_type);
+
+#endif  /* !_DEV_PCI_H_ */
diff --git a/sys/include/dev/pci/pcivar.h b/sys/include/dev/pci/pcivar.h
new file mode 100644
index 0000000..ba45a53
--- /dev/null
+++ b/sys/include/dev/pci/pcivar.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
+ * 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 Hyra 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 OWNER 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.
+ */
+
+#ifndef _DEV_PCIVAR_H_
+#define _DEV_PCIVAR_H_
+
+#include <sys/types.h>
+
+enum {
+    PCI_ACCESS_CAM,
+    PCI_ACCESS_ECAM
+};
+
+#endif  /* !_DEV_PCIVAR_H_ */