include/asm-sparc64/pbm.h

   1 /* $Id: pbm.h,v 1.27 2001/08/12 13:18:23 davem Exp $
   2  * pbm.h: UltraSparc PCI controller software state.
   3  *
   4  * Copyright (C) 1997, 1998, 1999 David S. Miller (davem@redhat.com)
   5  */
   6
   7 #ifndef __SPARC64_PBM_H
   8 #define __SPARC64_PBM_H
   9
  10 #include <linux/types.h>
  11 #include <linux/pci.h>
  12 #include <linux/ioport.h>
  13 #include <linux/spinlock.h>
  14 #include <linux/msi.h>
  15
  16 #include <asm/io.h>
  17 #include <asm/page.h>
  18 #include <asm/oplib.h>
  19 #include <asm/prom.h>
  20 #include <asm/of_device.h>
  21 #include <asm/iommu.h>
  22
  23 /* The abstraction used here is that there are PCI controllers,
  24  * each with one (Sabre) or two (PSYCHO/SCHIZO) PCI bus modules
  25  * underneath.  Each PCI bus module uses an IOMMU (shared by both
  26  * PBMs of a controller, or per-PBM), and if a streaming buffer
  27  * is present, each PCI bus module has it's own. (ie. the IOMMU
  28  * might be shared between PBMs, the STC is never shared)
  29  * Furthermore, each PCI bus module controls it's own autonomous
  30  * PCI bus.
  31  */
  32
  33 struct pci_controller_info;
  34
  35 /* This contains the software state necessary to drive a PCI
  36  * controller's IOMMU.
  37  */
  38 struct pci_iommu_arena {
  39         unsigned long   *map;
  40         unsigned int    hint;
  41         unsigned int    limit;
  42 };
  43
  44 struct pci_iommu {
  45         /* This protects the controller's IOMMU and all
  46          * streaming buffers underneath.
  47          */
  48         spinlock_t      lock;
  49
  50         struct pci_iommu_arena arena;
  51
  52         /* IOMMU page table, a linear array of ioptes. */
  53         iopte_t         *page_table;            /* The page table itself. */
  54
  55         /* Base PCI memory space address where IOMMU mappings
  56          * begin.
  57          */
  58         u32             page_table_map_base;
  59
  60         /* IOMMU Controller Registers */
  61         unsigned long   iommu_control;          /* IOMMU control register */
  62         unsigned long   iommu_tsbbase;          /* IOMMU page table base register */
  63         unsigned long   iommu_flush;            /* IOMMU page flush register */
  64         unsigned long   iommu_ctxflush;         /* IOMMU context flush register */
  65
  66         /* This is a register in the PCI controller, which if
  67          * read will have no side-effects but will guarantee
  68          * completion of all previous writes into IOMMU/STC.
  69          */
  70         unsigned long   write_complete_reg;
  71
  72         /* In order to deal with some buggy third-party PCI bridges that
  73          * do wrong prefetching, we never mark valid mappings as invalid.
  74          * Instead we point them at this dummy page.
  75          */
  76         unsigned long   dummy_page;
  77         unsigned long   dummy_page_pa;
  78
  79         /* CTX allocation. */
  80         unsigned long ctx_lowest_free;
  81         DECLARE_BITMAP(ctx_bitmap, IOMMU_NUM_CTXS);
  82
  83         /* Here a PCI controller driver describes the areas of
  84          * PCI memory space where DMA to/from physical memory
  85          * are addressed.  Drivers interrogate the PCI layer
  86          * if their device has addressing limitations.  They
  87          * do so via pci_dma_supported, and pass in a mask of
  88          * DMA address bits their device can actually drive.
  89          *
  90          * The test for being usable is:
  91          *      (device_mask & dma_addr_mask) == dma_addr_mask
  92          */
  93         u32 dma_addr_mask;
  94 };
  95
  96 extern void pci_iommu_table_init(struct pci_iommu *iommu, int tsbsize, u32 dma_offset, u32 dma_addr_mask);
  97
  98 /* This describes a PCI bus module's streaming buffer. */
  99 struct pci_strbuf {
 100         int             strbuf_enabled;         /* Present and using it? */
 101
 102         /* Streaming Buffer Control Registers */
 103         unsigned long   strbuf_control;         /* STC control register */
 104         unsigned long   strbuf_pflush;          /* STC page flush register */
 105         unsigned long   strbuf_fsync;           /* STC flush synchronization reg */
 106         unsigned long   strbuf_ctxflush;        /* STC context flush register */
 107         unsigned long   strbuf_ctxmatch_base;   /* STC context flush match reg */
 108         unsigned long   strbuf_flushflag_pa;    /* Physical address of flush flag */
 109         volatile unsigned long *strbuf_flushflag; /* The flush flag itself */
 110
 111         /* And this is the actual flush flag area.
 112          * We allocate extra because the chips require
 113          * a 64-byte aligned area.
 114          */
 115         volatile unsigned long  __flushflag_buf[(64 + (64 - 1)) / sizeof(long)];
 116 };
 117
 118 #define PCI_STC_FLUSHFLAG_INIT(STC) \
 119         (*((STC)->strbuf_flushflag) = 0UL)
 120 #define PCI_STC_FLUSHFLAG_SET(STC) \
 121         (*((STC)->strbuf_flushflag) != 0UL)
 122
 123 /* There can be quite a few ranges and interrupt maps on a PCI
 124  * segment.  Thus...
 125  */
 126 #define PROM_PCIRNG_MAX         64
 127 #define PROM_PCIIMAP_MAX        64
 128
 129 struct pci_pbm_info {
 130         /* PCI controller we sit under. */
 131         struct pci_controller_info      *parent;
 132
 133         /* Physical address base of controller registers. */
 134         unsigned long                   controller_regs;
 135
 136         /* Physical address base of PBM registers. */
 137         unsigned long                   pbm_regs;
 138
 139         /* Physical address of DMA sync register, if any.  */
 140         unsigned long                   sync_reg;
 141
 142         /* Opaque 32-bit system bus Port ID. */
 143         u32                             portid;
 144
 145         /* Opaque 32-bit handle used for hypervisor calls.  */
 146         u32                             devhandle;
 147
 148         /* Chipset version information. */
 149         int                             chip_type;
 150 #define PBM_CHIP_TYPE_SABRE             1
 151 #define PBM_CHIP_TYPE_PSYCHO            2
 152 #define PBM_CHIP_TYPE_SCHIZO            3
 153 #define PBM_CHIP_TYPE_SCHIZO_PLUS       4
 154 #define PBM_CHIP_TYPE_TOMATILLO         5
 155         int                             chip_version;
 156         int                             chip_revision;
 157
 158         /* Name used for top-level resources. */
 159         char                            *name;
 160
 161         /* OBP specific information. */
 162         struct device_node              *prom_node;
 163         u64                             ino_bitmap;
 164
 165         /* PBM I/O and Memory space resources. */
 166         struct resource                 io_space;
 167         struct resource                 mem_space;
 168
 169         /* Base of PCI Config space, can be per-PBM or shared. */
 170         unsigned long                   config_space;
 171
 172         /* State of 66MHz capabilities on this PBM. */
 173         int                             is_66mhz_capable;
 174         int                             all_devs_66mhz;
 175
 176 #ifdef CONFIG_PCI_MSI
 177         /* MSI info.  */
 178         u32                             msiq_num;
 179         u32                             msiq_ent_count;
 180         u32                             msiq_first;
 181         u32                             msiq_first_devino;
 182         u32                             msi_num;
 183         u32                             msi_first;
 184         u32                             msi_data_mask;
 185         u32                             msix_data_width;
 186         u64                             msi32_start;
 187         u64                             msi64_start;
 188         u32                             msi32_len;
 189         u32                             msi64_len;
 190         void                            *msi_queues;
 191         unsigned long                   *msi_bitmap;
 192 #endif /* !(CONFIG_PCI_MSI) */
 193
 194         /* This PBM's streaming buffer. */
 195         struct pci_strbuf               stc;
 196
 197         /* IOMMU state, potentially shared by both PBM segments. */
 198         struct pci_iommu                *iommu;
 199
 200         /* Now things for the actual PCI bus probes. */
 201         unsigned int                    pci_first_busno;
 202         unsigned int                    pci_last_busno;
 203         struct pci_bus                  *pci_bus;
 204 };
 205
 206 struct pci_controller_info {
 207         /* List of all PCI controllers. */
 208         struct pci_controller_info      *next;
 209
 210         /* Each controller gets a unique index, used mostly for
 211          * error logging purposes.
 212          */
 213         int                             index;
 214
 215         /* The PCI bus modules controlled by us. */
 216         struct pci_pbm_info             pbm_A;
 217         struct pci_pbm_info             pbm_B;
 218
 219         /* Operations which are controller specific. */
 220         void (*scan_bus)(struct pci_controller_info *);
 221
 222 #ifdef CONFIG_PCI_MSI
 223         int (*setup_msi_irq)(unsigned int *virt_irq_p, struct pci_dev *pdev,
 224                              struct msi_desc *entry);
 225         void (*teardown_msi_irq)(unsigned int virt_irq, struct pci_dev *pdev);
 226 #endif
 227
 228         /* Now things for the actual PCI bus probes. */
 229         struct pci_ops                  *pci_ops;
 230         unsigned int                    pci_first_busno;
 231         unsigned int                    pci_last_busno;
 232 };
 233
 234 #endif /* !(__SPARC64_PBM_H) */