1*b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2deae26bfSKyle McMartin #ifndef __ASM_PARISC_PCI_H 3deae26bfSKyle McMartin #define __ASM_PARISC_PCI_H 4deae26bfSKyle McMartin 584be456fSChristoph Hellwig #include <linux/scatterlist.h> 6deae26bfSKyle McMartin 7deae26bfSKyle McMartin 8deae26bfSKyle McMartin 9deae26bfSKyle McMartin /* 10deae26bfSKyle McMartin ** HP PCI platforms generally support multiple bus adapters. 11deae26bfSKyle McMartin ** (workstations 1-~4, servers 2-~32) 12deae26bfSKyle McMartin ** 13deae26bfSKyle McMartin ** Newer platforms number the busses across PCI bus adapters *sparsely*. 14deae26bfSKyle McMartin ** E.g. 0, 8, 16, ... 15deae26bfSKyle McMartin ** 16deae26bfSKyle McMartin ** Under a PCI bus, most HP platforms support PPBs up to two or three 17deae26bfSKyle McMartin ** levels deep. See "Bit3" product line. 18deae26bfSKyle McMartin */ 19deae26bfSKyle McMartin #define PCI_MAX_BUSSES 256 20deae26bfSKyle McMartin 21deae26bfSKyle McMartin 22deae26bfSKyle McMartin /* To be used as: mdelay(pci_post_reset_delay); 23deae26bfSKyle McMartin * 24deae26bfSKyle McMartin * post_reset is the time the kernel should stall to prevent anyone from 25deae26bfSKyle McMartin * accessing the PCI bus once #RESET is de-asserted. 26deae26bfSKyle McMartin * PCI spec somewhere says 1 second but with multi-PCI bus systems, 27deae26bfSKyle McMartin * this makes the boot time much longer than necessary. 28deae26bfSKyle McMartin * 20ms seems to work for all the HP PCI implementations to date. 29deae26bfSKyle McMartin */ 30deae26bfSKyle McMartin #define pci_post_reset_delay 50 31deae26bfSKyle McMartin 32deae26bfSKyle McMartin 33deae26bfSKyle McMartin /* 34deae26bfSKyle McMartin ** pci_hba_data (aka H2P_OBJECT in HP/UX) 35deae26bfSKyle McMartin ** 36deae26bfSKyle McMartin ** This is the "common" or "base" data structure which HBA drivers 37deae26bfSKyle McMartin ** (eg Dino or LBA) are required to place at the top of their own 38deae26bfSKyle McMartin ** platform_data structure. I've heard this called "C inheritance" too. 39deae26bfSKyle McMartin ** 40deae26bfSKyle McMartin ** Data needed by pcibios layer belongs here. 41deae26bfSKyle McMartin */ 42deae26bfSKyle McMartin struct pci_hba_data { 43deae26bfSKyle McMartin void __iomem *base_addr; /* aka Host Physical Address */ 44deae26bfSKyle McMartin const struct parisc_device *dev; /* device from PA bus walk */ 45deae26bfSKyle McMartin struct pci_bus *hba_bus; /* primary PCI bus below HBA */ 46deae26bfSKyle McMartin int hba_num; /* I/O port space access "key" */ 47deae26bfSKyle McMartin struct resource bus_num; /* PCI bus numbers */ 48deae26bfSKyle McMartin struct resource io_space; /* PIOP */ 49deae26bfSKyle McMartin struct resource lmmio_space; /* bus addresses < 4Gb */ 50deae26bfSKyle McMartin struct resource elmmio_space; /* additional bus addresses < 4Gb */ 51deae26bfSKyle McMartin struct resource gmmio_space; /* bus addresses > 4Gb */ 52deae26bfSKyle McMartin 53deae26bfSKyle McMartin /* NOTE: Dino code assumes it can use *all* of the lmmio_space, 54deae26bfSKyle McMartin * elmmio_space and gmmio_space as a contiguous array of 55deae26bfSKyle McMartin * resources. This #define represents the array size */ 56deae26bfSKyle McMartin #define DINO_MAX_LMMIO_RESOURCES 3 57deae26bfSKyle McMartin 58deae26bfSKyle McMartin unsigned long lmmio_space_offset; /* CPU view - PCI view */ 59deae26bfSKyle McMartin void * iommu; /* IOMMU this device is under */ 60deae26bfSKyle McMartin /* REVISIT - spinlock to protect resources? */ 61deae26bfSKyle McMartin 62deae26bfSKyle McMartin #define HBA_NAME_SIZE 16 63deae26bfSKyle McMartin char io_name[HBA_NAME_SIZE]; 64deae26bfSKyle McMartin char lmmio_name[HBA_NAME_SIZE]; 65deae26bfSKyle McMartin char elmmio_name[HBA_NAME_SIZE]; 66deae26bfSKyle McMartin char gmmio_name[HBA_NAME_SIZE]; 67deae26bfSKyle McMartin }; 68deae26bfSKyle McMartin 69deae26bfSKyle McMartin #define HBA_DATA(d) ((struct pci_hba_data *) (d)) 70deae26bfSKyle McMartin 71deae26bfSKyle McMartin /* 72deae26bfSKyle McMartin ** We support 2^16 I/O ports per HBA. These are set up in the form 73deae26bfSKyle McMartin ** 0xbbxxxx, where bb is the bus number and xxxx is the I/O port 74deae26bfSKyle McMartin ** space address. 75deae26bfSKyle McMartin */ 76deae26bfSKyle McMartin #define HBA_PORT_SPACE_BITS 16 77deae26bfSKyle McMartin 78deae26bfSKyle McMartin #define HBA_PORT_BASE(h) ((h) << HBA_PORT_SPACE_BITS) 79deae26bfSKyle McMartin #define HBA_PORT_SPACE_SIZE (1UL << HBA_PORT_SPACE_BITS) 80deae26bfSKyle McMartin 81deae26bfSKyle McMartin #define PCI_PORT_HBA(a) ((a) >> HBA_PORT_SPACE_BITS) 82deae26bfSKyle McMartin #define PCI_PORT_ADDR(a) ((a) & (HBA_PORT_SPACE_SIZE - 1)) 83deae26bfSKyle McMartin 84deae26bfSKyle McMartin #ifdef CONFIG_64BIT 85deae26bfSKyle McMartin #define PCI_F_EXTEND 0xffffffff00000000UL 86deae26bfSKyle McMartin #else /* !CONFIG_64BIT */ 87deae26bfSKyle McMartin #define PCI_F_EXTEND 0UL 88deae26bfSKyle McMartin #endif /* !CONFIG_64BIT */ 89deae26bfSKyle McMartin 90deae26bfSKyle McMartin /* 91deae26bfSKyle McMartin ** KLUGE: linux/pci.h include asm/pci.h BEFORE declaring struct pci_bus 92deae26bfSKyle McMartin ** (This eliminates some of the warnings). 93deae26bfSKyle McMartin */ 94deae26bfSKyle McMartin struct pci_bus; 95deae26bfSKyle McMartin struct pci_dev; 96deae26bfSKyle McMartin 97deae26bfSKyle McMartin /* 98deae26bfSKyle McMartin * If the PCI device's view of memory is the same as the CPU's view of memory, 99deae26bfSKyle McMartin * PCI_DMA_BUS_IS_PHYS is true. The networking and block device layers use 100deae26bfSKyle McMartin * this boolean for bounce buffer decisions. 101deae26bfSKyle McMartin */ 102deae26bfSKyle McMartin #ifdef CONFIG_PA20 103deae26bfSKyle McMartin /* All PA-2.0 machines have an IOMMU. */ 104deae26bfSKyle McMartin #define PCI_DMA_BUS_IS_PHYS 0 105deae26bfSKyle McMartin #define parisc_has_iommu() do { } while (0) 106deae26bfSKyle McMartin #else 107deae26bfSKyle McMartin 108deae26bfSKyle McMartin #if defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA) 109deae26bfSKyle McMartin extern int parisc_bus_is_phys; /* in arch/parisc/kernel/setup.c */ 110deae26bfSKyle McMartin #define PCI_DMA_BUS_IS_PHYS parisc_bus_is_phys 111deae26bfSKyle McMartin #define parisc_has_iommu() do { parisc_bus_is_phys = 0; } while (0) 112deae26bfSKyle McMartin #else 113deae26bfSKyle McMartin #define PCI_DMA_BUS_IS_PHYS 1 114deae26bfSKyle McMartin #define parisc_has_iommu() do { } while (0) 115deae26bfSKyle McMartin #endif 116deae26bfSKyle McMartin 117deae26bfSKyle McMartin #endif /* !CONFIG_PA20 */ 118deae26bfSKyle McMartin 119deae26bfSKyle McMartin 120deae26bfSKyle McMartin /* 121deae26bfSKyle McMartin ** Most PCI devices (eg Tulip, NCR720) also export the same registers 122deae26bfSKyle McMartin ** to both MMIO and I/O port space. Due to poor performance of I/O Port 123deae26bfSKyle McMartin ** access under HP PCI bus adapters, strongly recommend the use of MMIO 124deae26bfSKyle McMartin ** address space. 125deae26bfSKyle McMartin ** 126deae26bfSKyle McMartin ** While I'm at it more PA programming notes: 127deae26bfSKyle McMartin ** 128deae26bfSKyle McMartin ** 1) MMIO stores (writes) are posted operations. This means the processor 129deae26bfSKyle McMartin ** gets an "ACK" before the write actually gets to the device. A read 130deae26bfSKyle McMartin ** to the same device (or typically the bus adapter above it) will 131deae26bfSKyle McMartin ** force in-flight write transaction(s) out to the targeted device 132deae26bfSKyle McMartin ** before the read can complete. 133deae26bfSKyle McMartin ** 134deae26bfSKyle McMartin ** 2) The Programmed I/O (PIO) data may not always be strongly ordered with 135deae26bfSKyle McMartin ** respect to DMA on all platforms. Ie PIO data can reach the processor 136deae26bfSKyle McMartin ** before in-flight DMA reaches memory. Since most SMP PA platforms 137deae26bfSKyle McMartin ** are I/O coherent, it generally doesn't matter...but sometimes 138deae26bfSKyle McMartin ** it does. 139deae26bfSKyle McMartin ** 140deae26bfSKyle McMartin ** I've helped device driver writers debug both types of problems. 141deae26bfSKyle McMartin */ 142deae26bfSKyle McMartin struct pci_port_ops { 143deae26bfSKyle McMartin u8 (*inb) (struct pci_hba_data *hba, u16 port); 144deae26bfSKyle McMartin u16 (*inw) (struct pci_hba_data *hba, u16 port); 145deae26bfSKyle McMartin u32 (*inl) (struct pci_hba_data *hba, u16 port); 146deae26bfSKyle McMartin void (*outb) (struct pci_hba_data *hba, u16 port, u8 data); 147deae26bfSKyle McMartin void (*outw) (struct pci_hba_data *hba, u16 port, u16 data); 148deae26bfSKyle McMartin void (*outl) (struct pci_hba_data *hba, u16 port, u32 data); 149deae26bfSKyle McMartin }; 150deae26bfSKyle McMartin 151deae26bfSKyle McMartin 152deae26bfSKyle McMartin struct pci_bios_ops { 153deae26bfSKyle McMartin void (*init)(void); 154deae26bfSKyle McMartin void (*fixup_bus)(struct pci_bus *bus); 155deae26bfSKyle McMartin }; 156deae26bfSKyle McMartin 157deae26bfSKyle McMartin /* 158deae26bfSKyle McMartin ** Stuff declared in arch/parisc/kernel/pci.c 159deae26bfSKyle McMartin */ 160deae26bfSKyle McMartin extern struct pci_port_ops *pci_port; 161deae26bfSKyle McMartin extern struct pci_bios_ops *pci_bios; 162deae26bfSKyle McMartin 163deae26bfSKyle McMartin #ifdef CONFIG_PCI 164deae26bfSKyle McMartin extern void pcibios_register_hba(struct pci_hba_data *); 165deae26bfSKyle McMartin extern void pcibios_set_master(struct pci_dev *); 166deae26bfSKyle McMartin #else 167deae26bfSKyle McMartin static inline void pcibios_register_hba(struct pci_hba_data *x) 168deae26bfSKyle McMartin { 169deae26bfSKyle McMartin } 170deae26bfSKyle McMartin #endif 171602c9c9aSHelge Deller extern void pcibios_init_bridge(struct pci_dev *); 172deae26bfSKyle McMartin 173deae26bfSKyle McMartin /* 174deae26bfSKyle McMartin * pcibios_assign_all_busses() is used in drivers/pci/pci.c:pci_do_scan_bus() 175deae26bfSKyle McMartin * 0 == check if bridge is numbered before re-numbering. 176deae26bfSKyle McMartin * 1 == pci_do_scan_bus() should automatically number all PCI-PCI bridges. 177deae26bfSKyle McMartin * 178deae26bfSKyle McMartin * We *should* set this to zero for "legacy" platforms and one 179deae26bfSKyle McMartin * for PAT platforms. 180deae26bfSKyle McMartin * 181deae26bfSKyle McMartin * But legacy platforms also need to renumber the busses below a Host 182deae26bfSKyle McMartin * Bus controller. Adding a 4-port Tulip card on the first PCI root 183deae26bfSKyle McMartin * bus of a C200 resulted in the secondary bus being numbered as 1. 184deae26bfSKyle McMartin * The second PCI host bus controller's root bus had already been 185deae26bfSKyle McMartin * assigned bus number 1 by firmware and sysfs complained. 186deae26bfSKyle McMartin * 187deae26bfSKyle McMartin * Firmware isn't doing anything wrong here since each controller 188deae26bfSKyle McMartin * is its own PCI domain. It's simpler and easier for us to renumber 189deae26bfSKyle McMartin * the busses rather than treat each Dino as a separate PCI domain. 190deae26bfSKyle McMartin * Eventually, we may want to introduce PCI domains for Superdome or 191deae26bfSKyle McMartin * rp7420/8420 boxes and then revisit this issue. 192deae26bfSKyle McMartin */ 193deae26bfSKyle McMartin #define pcibios_assign_all_busses() (1) 194deae26bfSKyle McMartin 195deae26bfSKyle McMartin #define PCIBIOS_MIN_IO 0x10 196deae26bfSKyle McMartin #define PCIBIOS_MIN_MEM 0x1000 /* NBPG - but pci/setup-res.c dies */ 197deae26bfSKyle McMartin 198deae26bfSKyle McMartin static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) 199deae26bfSKyle McMartin { 200deae26bfSKyle McMartin return channel ? 15 : 14; 201deae26bfSKyle McMartin } 202deae26bfSKyle McMartin 2032cc7138fSThomas Bogendoerfer #define HAVE_PCI_MMAP 2046a94ca14SDavid Woodhouse #define ARCH_GENERIC_PCI_MMAP_RESOURCE 2052cc7138fSThomas Bogendoerfer 206deae26bfSKyle McMartin #endif /* __ASM_PARISC_PCI_H */ 207