1 #ifndef __ASM_PARISC_PCI_H
2 #define __ASM_PARISC_PCI_H
4 #include <linux/config.h>
5 #include <asm/scatterlist.h>
10 ** HP PCI platforms generally support multiple bus adapters.
11 ** (workstations 1-~4, servers 2-~32)
13 ** Newer platforms number the busses across PCI bus adapters *sparsely*.
16 ** Under a PCI bus, most HP platforms support PPBs up to two or three
17 ** levels deep. See "Bit3" product line.
19 #define PCI_MAX_BUSSES 256
22 ** pci_hba_data (aka H2P_OBJECT in HP/UX)
24 ** This is the "common" or "base" data structure which HBA drivers
25 ** (eg Dino or LBA) are required to place at the top of their own
26 ** platform_data structure. I've heard this called "C inheritance" too.
28 ** Data needed by pcibios layer belongs here.
31 void __iomem *base_addr; /* aka Host Physical Address */
32 const struct parisc_device *dev; /* device from PA bus walk */
33 struct pci_bus *hba_bus; /* primary PCI bus below HBA */
34 int hba_num; /* I/O port space access "key" */
35 struct resource bus_num; /* PCI bus numbers */
36 struct resource io_space; /* PIOP */
37 struct resource lmmio_space; /* bus addresses < 4Gb */
38 struct resource elmmio_space; /* additional bus addresses < 4Gb */
39 struct resource gmmio_space; /* bus addresses > 4Gb */
41 /* NOTE: Dino code assumes it can use *all* of the lmmio_space,
42 * elmmio_space and gmmio_space as a contiguous array of
43 * resources. This #define represents the array size */
44 #define DINO_MAX_LMMIO_RESOURCES 3
46 unsigned long lmmio_space_offset; /* CPU view - PCI view */
47 void * iommu; /* IOMMU this device is under */
48 /* REVISIT - spinlock to protect resources? */
50 #define HBA_NAME_SIZE 16
51 char io_name[HBA_NAME_SIZE];
52 char lmmio_name[HBA_NAME_SIZE];
53 char elmmio_name[HBA_NAME_SIZE];
54 char gmmio_name[HBA_NAME_SIZE];
57 #define HBA_DATA(d) ((struct pci_hba_data *) (d))
60 ** We support 2^16 I/O ports per HBA. These are set up in the form
61 ** 0xbbxxxx, where bb is the bus number and xxxx is the I/O port
64 #define HBA_PORT_SPACE_BITS 16
66 #define HBA_PORT_BASE(h) ((h) << HBA_PORT_SPACE_BITS)
67 #define HBA_PORT_SPACE_SIZE (1UL << HBA_PORT_SPACE_BITS)
69 #define PCI_PORT_HBA(a) ((a) >> HBA_PORT_SPACE_BITS)
70 #define PCI_PORT_ADDR(a) ((a) & (HBA_PORT_SPACE_SIZE - 1))
73 #define PCI_F_EXTEND 0xffffffff00000000UL
74 #define PCI_IS_LMMIO(hba,a) pci_is_lmmio(hba,a)
76 /* We need to know if an address is LMMMIO or GMMIO.
77 * LMMIO requires mangling and GMMIO we must use as-is.
79 static __inline__ int pci_is_lmmio(struct pci_hba_data *hba, unsigned long a)
81 return(((a) & PCI_F_EXTEND) == PCI_F_EXTEND);
85 ** Convert between PCI (IO_VIEW) addresses and processor (PA_VIEW) addresses.
86 ** See pcibios.c for more conversions used by Generic PCI code.
88 #define PCI_BUS_ADDR(hba,a) (PCI_IS_LMMIO(hba,a) \
89 ? ((a) - hba->lmmio_space_offset) /* mangle LMMIO */ \
91 #define PCI_HOST_ADDR(hba,a) ((a) + hba->lmmio_space_offset)
93 #else /* !CONFIG_64BIT */
95 #define PCI_BUS_ADDR(hba,a) (a)
96 #define PCI_HOST_ADDR(hba,a) (a)
97 #define PCI_F_EXTEND 0UL
98 #define PCI_IS_LMMIO(hba,a) (1) /* 32-bit doesn't support GMMIO */
100 #endif /* !CONFIG_64BIT */
103 ** KLUGE: linux/pci.h include asm/pci.h BEFORE declaring struct pci_bus
104 ** (This eliminates some of the warnings).
110 * If the PCI device's view of memory is the same as the CPU's view of memory,
111 * PCI_DMA_BUS_IS_PHYS is true. The networking and block device layers use
112 * this boolean for bounce buffer decisions.
115 /* All PA-2.0 machines have an IOMMU. */
116 #define PCI_DMA_BUS_IS_PHYS 0
117 #define parisc_has_iommu() do { } while (0)
120 #if defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA)
121 extern int parisc_bus_is_phys; /* in arch/parisc/kernel/setup.c */
122 #define PCI_DMA_BUS_IS_PHYS parisc_bus_is_phys
123 #define parisc_has_iommu() do { parisc_bus_is_phys = 0; } while (0)
125 #define PCI_DMA_BUS_IS_PHYS 1
126 #define parisc_has_iommu() do { } while (0)
129 #endif /* !CONFIG_PA20 */
133 ** Most PCI devices (eg Tulip, NCR720) also export the same registers
134 ** to both MMIO and I/O port space. Due to poor performance of I/O Port
135 ** access under HP PCI bus adapters, strongly reccomend use of MMIO
138 ** While I'm at it more PA programming notes:
140 ** 1) MMIO stores (writes) are posted operations. This means the processor
141 ** gets an "ACK" before the write actually gets to the device. A read
142 ** to the same device (or typically the bus adapter above it) will
143 ** force in-flight write transaction(s) out to the targeted device
144 ** before the read can complete.
146 ** 2) The Programmed I/O (PIO) data may not always be strongly ordered with
147 ** respect to DMA on all platforms. Ie PIO data can reach the processor
148 ** before in-flight DMA reaches memory. Since most SMP PA platforms
149 ** are I/O coherent, it generally doesn't matter...but sometimes
152 ** I've helped device driver writers debug both types of problems.
154 struct pci_port_ops {
155 u8 (*inb) (struct pci_hba_data *hba, u16 port);
156 u16 (*inw) (struct pci_hba_data *hba, u16 port);
157 u32 (*inl) (struct pci_hba_data *hba, u16 port);
158 void (*outb) (struct pci_hba_data *hba, u16 port, u8 data);
159 void (*outw) (struct pci_hba_data *hba, u16 port, u16 data);
160 void (*outl) (struct pci_hba_data *hba, u16 port, u32 data);
164 struct pci_bios_ops {
166 void (*fixup_bus)(struct pci_bus *bus);
169 /* pci_unmap_{single,page} is not a nop, thus... */
170 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
171 dma_addr_t ADDR_NAME;
172 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
174 #define pci_unmap_addr(PTR, ADDR_NAME) \
176 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
177 (((PTR)->ADDR_NAME) = (VAL))
178 #define pci_unmap_len(PTR, LEN_NAME) \
180 #define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
181 (((PTR)->LEN_NAME) = (VAL))
184 ** Stuff declared in arch/parisc/kernel/pci.c
186 extern struct pci_port_ops *pci_port;
187 extern struct pci_bios_ops *pci_bios;
188 extern int pci_post_reset_delay; /* delay after de-asserting #RESET */
189 extern int pci_hba_count;
190 extern struct pci_hba_data *parisc_pci_hba[];
193 extern void pcibios_register_hba(struct pci_hba_data *);
194 extern void pcibios_set_master(struct pci_dev *);
196 extern inline void pcibios_register_hba(struct pci_hba_data *x)
202 * pcibios_assign_all_busses() is used in drivers/pci/pci.c:pci_do_scan_bus()
203 * 0 == check if bridge is numbered before re-numbering.
204 * 1 == pci_do_scan_bus() should automatically number all PCI-PCI bridges.
206 * We *should* set this to zero for "legacy" platforms and one
209 * But legacy platforms also need to renumber the busses below a Host
210 * Bus controller. Adding a 4-port Tulip card on the first PCI root
211 * bus of a C200 resulted in the secondary bus being numbered as 1.
212 * The second PCI host bus controller's root bus had already been
213 * assigned bus number 1 by firmware and sysfs complained.
215 * Firmware isn't doing anything wrong here since each controller
216 * is its own PCI domain. It's simpler and easier for us to renumber
217 * the busses rather than treat each Dino as a separate PCI domain.
218 * Eventually, we may want to introduce PCI domains for Superdome or
219 * rp7420/8420 boxes and then revisit this issue.
221 #define pcibios_assign_all_busses() (1)
222 #define pcibios_scan_all_fns(a, b) (0)
224 #define PCIBIOS_MIN_IO 0x10
225 #define PCIBIOS_MIN_MEM 0x1000 /* NBPG - but pci/setup-res.c dies */
227 /* Don't support DAC yet. */
228 #define pci_dac_dma_supported(pci_dev, mask) (0)
230 /* export the pci_ DMA API in terms of the dma_ one */
231 #include <asm-generic/pci-dma-compat.h>
234 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
235 enum pci_dma_burst_strategy *strat,
236 unsigned long *strategy_parameter)
238 unsigned long cacheline_size;
241 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
243 cacheline_size = 1024;
245 cacheline_size = (int) byte * 4;
247 *strat = PCI_DMA_BURST_MULTIPLE;
248 *strategy_parameter = cacheline_size;
253 pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
254 struct resource *res);
257 pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
258 struct pci_bus_region *region);
260 static inline struct resource *
261 pcibios_select_root(struct pci_dev *pdev, struct resource *res)
263 struct resource *root = NULL;
265 if (res->flags & IORESOURCE_IO)
266 root = &ioport_resource;
267 if (res->flags & IORESOURCE_MEM)
268 root = &iomem_resource;
273 static inline void pcibios_add_platform_entries(struct pci_dev *dev)
277 #endif /* __ASM_PARISC_PCI_H */