parisc: move include/asm-parisc to arch/parisc/include/asm

1 files changed, 294 insertions, 0 deletions

diff --git a/arch/parisc/include/asm/pci.h b/arch/parisc/include/asm/pci.h
new file mode 100644
index 000000000000..4ba868f44a5e
--- /dev/null
+++ b/arch/parisc/include/asm/pci.h
@@ -0,0 +1,294 @@
+#ifndef __ASM_PARISC_PCI_H
+#define __ASM_PARISC_PCI_H
+
+#include <asm/scatterlist.h>
+
+
+
+/*
+** HP PCI platforms generally support multiple bus adapters.
+**    (workstations 1-~4, servers 2-~32)
+**
+** Newer platforms number the busses across PCI bus adapters *sparsely*.
+** E.g. 0, 8, 16, ...
+**
+** Under a PCI bus, most HP platforms support PPBs up to two or three
+** levels deep. See "Bit3" product line. 
+*/
+#define PCI_MAX_BUSSES  256
+
+
+/* To be used as: mdelay(pci_post_reset_delay);
+ *
+ * post_reset is the time the kernel should stall to prevent anyone from
+ * accessing the PCI bus once #RESET is de-asserted. 
+ * PCI spec somewhere says 1 second but with multi-PCI bus systems,
+ * this makes the boot time much longer than necessary.
+ * 20ms seems to work for all the HP PCI implementations to date.
+ */
+#define pci_post_reset_delay 50
+
+
+/*
+** pci_hba_data (aka H2P_OBJECT in HP/UX)
+**
+** This is the "common" or "base" data structure which HBA drivers
+** (eg Dino or LBA) are required to place at the top of their own
+** platform_data structure.  I've heard this called "C inheritance" too.
+**
+** Data needed by pcibios layer belongs here.
+*/
+struct pci_hba_data {
+        void __iomem   *base_addr;      /* aka Host Physical Address */
+        const struct parisc_device *dev; /* device from PA bus walk */
+        struct pci_bus *hba_bus;        /* primary PCI bus below HBA */
+        int             hba_num;        /* I/O port space access "key" */
+        struct resource bus_num;        /* PCI bus numbers */
+        struct resource io_space;       /* PIOP */
+        struct resource lmmio_space;    /* bus addresses < 4Gb */
+        struct resource elmmio_space;   /* additional bus addresses < 4Gb */
+        struct resource gmmio_space;    /* bus addresses > 4Gb */
+
+        /* NOTE: Dino code assumes it can use *all* of the lmmio_space,
+         * elmmio_space and gmmio_space as a contiguous array of
+         * resources.  This #define represents the array size */
+        #define DINO_MAX_LMMIO_RESOURCES        3
+
+        unsigned long   lmmio_space_offset;  /* CPU view - PCI view */
+        void *          iommu;          /* IOMMU this device is under */
+        /* REVISIT - spinlock to protect resources? */
+
+        #define HBA_NAME_SIZE 16
+        char io_name[HBA_NAME_SIZE];
+        char lmmio_name[HBA_NAME_SIZE];
+        char elmmio_name[HBA_NAME_SIZE];
+        char gmmio_name[HBA_NAME_SIZE];
+};
+
+#define HBA_DATA(d)             ((struct pci_hba_data *) (d))
+
+/* 
+** We support 2^16 I/O ports per HBA.  These are set up in the form
+** 0xbbxxxx, where bb is the bus number and xxxx is the I/O port
+** space address.
+*/
+#define HBA_PORT_SPACE_BITS     16
+
+#define HBA_PORT_BASE(h)        ((h) << HBA_PORT_SPACE_BITS)
+#define HBA_PORT_SPACE_SIZE     (1UL << HBA_PORT_SPACE_BITS)
+
+#define PCI_PORT_HBA(a)         ((a) >> HBA_PORT_SPACE_BITS)
+#define PCI_PORT_ADDR(a)        ((a) & (HBA_PORT_SPACE_SIZE - 1))
+
+#ifdef CONFIG_64BIT
+#define PCI_F_EXTEND            0xffffffff00000000UL
+#define PCI_IS_LMMIO(hba,a)     pci_is_lmmio(hba,a)
+
+/* We need to know if an address is LMMMIO or GMMIO.
+ * LMMIO requires mangling and GMMIO we must use as-is.
+ */
+static __inline__  int pci_is_lmmio(struct pci_hba_data *hba, unsigned long a)
+{
+        return(((a) & PCI_F_EXTEND) == PCI_F_EXTEND);
+}
+
+/*
+** Convert between PCI (IO_VIEW) addresses and processor (PA_VIEW) addresses.
+** See pci.c for more conversions used by Generic PCI code.
+**
+** Platform characteristics/firmware guarantee that
+**      (1) PA_VIEW - IO_VIEW = lmmio_offset for both LMMIO and ELMMIO
+**      (2) PA_VIEW == IO_VIEW for GMMIO
+*/
+#define PCI_BUS_ADDR(hba,a)     (PCI_IS_LMMIO(hba,a)    \
+                ?  ((a) - hba->lmmio_space_offset)      /* mangle LMMIO */ \
+                : (a))                                  /* GMMIO */
+#define PCI_HOST_ADDR(hba,a)    (((a) & PCI_F_EXTEND) == 0 \
+                ? (a) + hba->lmmio_space_offset \
+                : (a))
+
+#else   /* !CONFIG_64BIT */
+
+#define PCI_BUS_ADDR(hba,a)     (a)
+#define PCI_HOST_ADDR(hba,a)    (a)
+#define PCI_F_EXTEND            0UL
+#define PCI_IS_LMMIO(hba,a)     (1)     /* 32-bit doesn't support GMMIO */
+
+#endif /* !CONFIG_64BIT */
+
+/*
+** KLUGE: linux/pci.h include asm/pci.h BEFORE declaring struct pci_bus
+** (This eliminates some of the warnings).
+*/
+struct pci_bus;
+struct pci_dev;
+
+/*
+ * If the PCI device's view of memory is the same as the CPU's view of memory,
+ * PCI_DMA_BUS_IS_PHYS is true.  The networking and block device layers use
+ * this boolean for bounce buffer decisions.
+ */
+#ifdef CONFIG_PA20
+/* All PA-2.0 machines have an IOMMU. */
+#define PCI_DMA_BUS_IS_PHYS     0
+#define parisc_has_iommu()      do { } while (0)
+#else
+
+#if defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA)
+extern int parisc_bus_is_phys;  /* in arch/parisc/kernel/setup.c */
+#define PCI_DMA_BUS_IS_PHYS     parisc_bus_is_phys
+#define parisc_has_iommu()      do { parisc_bus_is_phys = 0; } while (0)
+#else
+#define PCI_DMA_BUS_IS_PHYS     1
+#define parisc_has_iommu()      do { } while (0)
+#endif
+
+#endif  /* !CONFIG_PA20 */
+
+
+/*
+** Most PCI devices (eg Tulip, NCR720) also export the same registers
+** to both MMIO and I/O port space.  Due to poor performance of I/O Port
+** access under HP PCI bus adapters, strongly recommend the use of MMIO
+** address space.
+**
+** While I'm at it more PA programming notes:
+**
+** 1) MMIO stores (writes) are posted operations. This means the processor
+**    gets an "ACK" before the write actually gets to the device. A read
+**    to the same device (or typically the bus adapter above it) will
+**    force in-flight write transaction(s) out to the targeted device
+**    before the read can complete.
+**
+** 2) The Programmed I/O (PIO) data may not always be strongly ordered with
+**    respect to DMA on all platforms. Ie PIO data can reach the processor
+**    before in-flight DMA reaches memory. Since most SMP PA platforms
+**    are I/O coherent, it generally doesn't matter...but sometimes
+**    it does.
+**
+** I've helped device driver writers debug both types of problems.
+*/
+struct pci_port_ops {
+          u8 (*inb)  (struct pci_hba_data *hba, u16 port);
+         u16 (*inw)  (struct pci_hba_data *hba, u16 port);
+         u32 (*inl)  (struct pci_hba_data *hba, u16 port);
+        void (*outb) (struct pci_hba_data *hba, u16 port,  u8 data);
+        void (*outw) (struct pci_hba_data *hba, u16 port, u16 data);
+        void (*outl) (struct pci_hba_data *hba, u16 port, u32 data);
+};
+
+
+struct pci_bios_ops {
+        void (*init)(void);
+        void (*fixup_bus)(struct pci_bus *bus);
+};
+
+/* pci_unmap_{single,page} is not a nop, thus... */
+#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       \
+        dma_addr_t ADDR_NAME;
+#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         \
+        __u32 LEN_NAME;
+#define pci_unmap_addr(PTR, ADDR_NAME)                  \
+        ((PTR)->ADDR_NAME)
+#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)         \
+        (((PTR)->ADDR_NAME) = (VAL))
+#define pci_unmap_len(PTR, LEN_NAME)                    \
+        ((PTR)->LEN_NAME)
+#define pci_unmap_len_set(PTR, LEN_NAME, VAL)           \
+        (((PTR)->LEN_NAME) = (VAL))
+
+/*
+** Stuff declared in arch/parisc/kernel/pci.c
+*/
+extern struct pci_port_ops *pci_port;
+extern struct pci_bios_ops *pci_bios;
+
+#ifdef CONFIG_PCI
+extern void pcibios_register_hba(struct pci_hba_data *);
+extern void pcibios_set_master(struct pci_dev *);
+#else
+static inline void pcibios_register_hba(struct pci_hba_data *x)
+{
+}
+#endif
+
+/*
+ * pcibios_assign_all_busses() is used in drivers/pci/pci.c:pci_do_scan_bus()
+ *   0 == check if bridge is numbered before re-numbering.
+ *   1 == pci_do_scan_bus() should automatically number all PCI-PCI bridges.
+ *
+ *   We *should* set this to zero for "legacy" platforms and one
+ *   for PAT platforms.
+ *
+ *   But legacy platforms also need to renumber the busses below a Host
+ *   Bus controller.  Adding a 4-port Tulip card on the first PCI root
+ *   bus of a C200 resulted in the secondary bus being numbered as 1.
+ *   The second PCI host bus controller's root bus had already been
+ *   assigned bus number 1 by firmware and sysfs complained.
+ *
+ *   Firmware isn't doing anything wrong here since each controller
+ *   is its own PCI domain.  It's simpler and easier for us to renumber
+ *   the busses rather than treat each Dino as a separate PCI domain.
+ *   Eventually, we may want to introduce PCI domains for Superdome or
+ *   rp7420/8420 boxes and then revisit this issue.
+ */
+#define pcibios_assign_all_busses()     (1)
+#define pcibios_scan_all_fns(a, b)      (0)
+
+#define PCIBIOS_MIN_IO          0x10
+#define PCIBIOS_MIN_MEM         0x1000 /* NBPG - but pci/setup-res.c dies */
+
+/* export the pci_ DMA API in terms of the dma_ one */
+#include <asm-generic/pci-dma-compat.h>
+
+#ifdef CONFIG_PCI
+static inline void pci_dma_burst_advice(struct pci_dev *pdev,
+                                        enum pci_dma_burst_strategy *strat,
+                                        unsigned long *strategy_parameter)
+{
+        unsigned long cacheline_size;
+        u8 byte;
+
+        pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
+        if (byte == 0)
+                cacheline_size = 1024;
+        else
+                cacheline_size = (int) byte * 4;
+
+        *strat = PCI_DMA_BURST_MULTIPLE;
+        *strategy_parameter = cacheline_size;
+}
+#endif
+
+extern void
+pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
+                         struct resource *res);
+
+extern void
+pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
+                        struct pci_bus_region *region);
+
+static inline struct resource *
+pcibios_select_root(struct pci_dev *pdev, struct resource *res)
+{
+        struct resource *root = NULL;
+
+        if (res->flags & IORESOURCE_IO)
+                root = &ioport_resource;
+        if (res->flags & IORESOURCE_MEM)
+                root = &iomem_resource;
+
+        return root;
+}
+
+static inline void pcibios_penalize_isa_irq(int irq, int active)
+{
+        /* We don't need to penalize isa irq's */
+}
+
+static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
+{
+        return channel ? 15 : 14;
+}
+
+#endif /* __ASM_PARISC_PCI_H */