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authorKyle McMartin <kyle@mcmartin.ca>2008-07-29 07:02:13 +0400
committerKyle McMartin <kyle@hera.kernel.org>2008-10-10 20:32:29 +0400
commitdeae26bf6a10e47983606f5df080b91e97650ead (patch)
tree84a8a68145d0f713d7c5a1f9e6b3b03be9b3a4c8 /arch/parisc/include/asm/pci.h
parent6c86cb8237bf08443806089130dc108051569a93 (diff)
downloadlinux-deae26bf6a10e47983606f5df080b91e97650ead.tar.xz
parisc: move include/asm-parisc to arch/parisc/include/asm
Diffstat (limited to 'arch/parisc/include/asm/pci.h')
-rw-r--r--arch/parisc/include/asm/pci.h294
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
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+++ 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 */