forked from Minki/linux
297 lines
9.2 KiB
C
297 lines
9.2 KiB
C
#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 reccomend 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
|
|
extern 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 */
|
|
|
|
/* Don't support DAC yet. */
|
|
#define pci_dac_dma_supported(pci_dev, mask) (0)
|
|
|
|
/* 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_add_platform_entries(struct pci_dev *dev)
|
|
{
|
|
}
|
|
|
|
static inline void pcibios_penalize_isa_irq(int irq, int active)
|
|
{
|
|
/* We don't need to penalize isa irq's */
|
|
}
|
|
|
|
#endif /* __ASM_PARISC_PCI_H */
|