s390/pci: base support

[linux.git] / arch / s390 / include / asm / pci.h

diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index 42a145c9ddd62f2c05ea20172d0ef9a8995e20ee..ff7b3596f47c56a01a250f4a537b01029b05c1ac 100644 (file)
--- a/arch/s390/include/asm/pci.h
+++ b/arch/s390/include/asm/pci.h
@@ -1,10 +1,84 @@
 #ifndef __ASM_S390_PCI_H
 #define __ASM_S390_PCI_H
 
-/* S/390 systems don't have a PCI bus. This file is just here because some stupid .c code
- * includes it even if CONFIG_PCI is not set.
- */
+/* must be set before including asm-generic/pci.h */
 #define PCI_DMA_BUS_IS_PHYS (0)
+/* must be set before including pci_clp.h */
+#define PCI_BAR_COUNT  6
 
-#endif /* __ASM_S390_PCI_H */
+#include <asm-generic/pci.h>
+#include <asm-generic/pci-dma-compat.h>
 
+#define PCIBIOS_MIN_IO         0x1000
+#define PCIBIOS_MIN_MEM                0x10000000
+
+#define pcibios_assign_all_busses()    (0)
+
+void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
+void pci_iounmap(struct pci_dev *, void __iomem *);
+int pci_domain_nr(struct pci_bus *);
+int pci_proc_domain(struct pci_bus *);
+
+#define ZPCI_BUS_NR                    0       /* default bus number */
+#define ZPCI_DEVFN                     0       /* default device number */
+
+/* PCI Function Controls */
+#define ZPCI_FC_FN_ENABLED             0x80
+#define ZPCI_FC_ERROR                  0x40
+#define ZPCI_FC_BLOCKED                        0x20
+#define ZPCI_FC_DMA_ENABLED            0x10
+
+enum zpci_state {
+       ZPCI_FN_STATE_RESERVED,
+       ZPCI_FN_STATE_STANDBY,
+       ZPCI_FN_STATE_CONFIGURED,
+       ZPCI_FN_STATE_ONLINE,
+       NR_ZPCI_FN_STATES,
+};
+
+struct zpci_bar_struct {
+       u32             val;            /* bar start & 3 flag bits */
+       u8              size;           /* order 2 exponent */
+       u16             map_idx;        /* index into bar mapping array */
+};
+
+/* Private data per function */
+struct zpci_dev {
+       struct pci_dev  *pdev;
+       struct pci_bus  *bus;
+       struct list_head entry;         /* list of all zpci_devices, needed for hotplug, etc. */
+
+       enum zpci_state state;
+       u32             fid;            /* function ID, used by sclp */
+       u32             fh;             /* function handle, used by insn's */
+       u16             pchid;          /* physical channel ID */
+       u8              pfgid;          /* function group ID */
+       u16             domain;
+
+       struct zpci_bar_struct bars[PCI_BAR_COUNT];
+
+       enum pci_bus_speed max_bus_speed;
+};
+
+static inline bool zdev_enabled(struct zpci_dev *zdev)
+{
+       return (zdev->fh & (1UL << 31)) ? true : false;
+}
+
+/* -----------------------------------------------------------------------------
+  Prototypes
+----------------------------------------------------------------------------- */
+/* Base stuff */
+struct zpci_dev *zpci_alloc_device(void);
+int zpci_create_device(struct zpci_dev *);
+int zpci_enable_device(struct zpci_dev *);
+void zpci_stop_device(struct zpci_dev *);
+void zpci_free_device(struct zpci_dev *);
+int zpci_scan_device(struct zpci_dev *);
+
+/* Helpers */
+struct zpci_dev *get_zdev(struct pci_dev *);
+struct zpci_dev *get_zdev_by_fid(u32);
+bool zpci_fid_present(u32);
+
+#endif