kernel

linux-6.8.1/arch/alpha/include/asm/pci.h

@@ -0,0 +1,91 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ALPHA_PCI_H
+#define __ALPHA_PCI_H
+
+#ifdef __KERNEL__
+
+#include <linux/spinlock.h>
+#include <linux/dma-mapping.h>
+#include <linux/scatterlist.h>
+#include <asm/machvec.h>
+
+/*
+ * The following structure is used to manage multiple PCI busses.
+ */
+
+struct pci_iommu_arena;
+struct page;
+
+/* A controller.  Used to manage multiple PCI busses.  */
+
+struct pci_controller {
+	struct pci_controller *next;
+        struct pci_bus *bus;
+	struct resource *io_space;
+	struct resource *mem_space;
+
+	/* The following are for reporting to userland.  The invariant is
+	   that if we report a BWX-capable dense memory, we do not report
+	   a sparse memory at all, even if it exists.  */
+	unsigned long sparse_mem_base;
+	unsigned long dense_mem_base;
+	unsigned long sparse_io_base;
+	unsigned long dense_io_base;
+
+	/* This one's for the kernel only.  It's in KSEG somewhere.  */
+	unsigned long config_space_base;
+
+	unsigned int index;
+	/* For compatibility with current (as of July 2003) pciutils
+	   and XFree86. Eventually will be removed. */
+	unsigned int need_domain_info;
+
+	struct pci_iommu_arena *sg_pci;
+	struct pci_iommu_arena *sg_isa;
+
+	void *sysdata;
+};
+
+/* Override the logic in pci_scan_bus for skipping already-configured
+   bus numbers.  */
+
+#define pcibios_assign_all_busses()	1
+
+#define PCIBIOS_MIN_IO		alpha_mv.min_io_address
+#define PCIBIOS_MIN_MEM		alpha_mv.min_mem_address
+
+/* IOMMU controls.  */
+
+#define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
+
+static inline int pci_proc_domain(struct pci_bus *bus)
+{
+	struct pci_controller *hose = bus->sysdata;
+	return hose->need_domain_info;
+}
+
+#endif /* __KERNEL__ */
+
+/* Values for the `which' argument to sys_pciconfig_iobase.  */
+#define IOBASE_HOSE		0
+#define IOBASE_SPARSE_MEM	1
+#define IOBASE_DENSE_MEM	2
+#define IOBASE_SPARSE_IO	3
+#define IOBASE_DENSE_IO		4
+#define IOBASE_ROOT_BUS		5
+#define IOBASE_FROM_HOSE	0x10000
+
+extern struct pci_dev *isa_bridge;
+
+extern int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val,
+			   size_t count);
+extern int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val,
+			    size_t count);
+extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
+				      struct vm_area_struct *vma,
+				      enum pci_mmap_state mmap_state);
+extern void pci_adjust_legacy_attr(struct pci_bus *bus,
+				   enum pci_mmap_state mmap_type);
+#define HAVE_PCI_LEGACY	1
+
+#endif /* __ALPHA_PCI_H */