include/asm-ia64/sn/tioca_provider.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (c) 2003-2005 Silicon Graphics, Inc. All rights reserved.
   7  */
   8
   9 #ifndef _ASM_IA64_SN_TIO_CA_AGP_PROVIDER_H
  10 #define _ASM_IA64_SN_TIO_CA_AGP_PROVIDER_H
  11
  12 #include <asm/sn/tioca.h>
  13
  14 /*
  15  * WAR enables
  16  * Defines for individual WARs. Each is a bitmask of applicable
  17  * part revision numbers. (1 << 1) == rev A, (1 << 2) == rev B,
  18  * (3 << 1) == (rev A or rev B), etc
  19  */
  20
  21 #define TIOCA_WAR_ENABLED(pv, tioca_common) \
  22         ((1 << tioca_common->ca_rev) & pv)
  23
  24   /* TIO:ICE:FRZ:Freezer loses a PIO data ucred on PIO RD RSP with CW error */
  25 #define PV907908 (1 << 1)
  26   /* ATI config space problems after BIOS execution starts */
  27 #define PV908234 (1 << 1)
  28   /* CA:AGPDMA write request data mismatch with ABC1CL merge */
  29 #define PV895469 (1 << 1)
  30   /* TIO:CA TLB invalidate of written GART entries possibly not occurring in CA*/
  31 #define PV910244 (1 << 1)
  32
  33 struct tioca_dmamap{
  34         struct list_head        cad_list;       /* headed by ca_list */
  35
  36         dma_addr_t              cad_dma_addr;   /* Linux dma handle */
  37         uint                    cad_gart_entry; /* start entry in ca_gart_pagemap */
  38         uint                    cad_gart_size;  /* #entries for this map */
  39 };
  40
  41 /*
  42  * Kernel only fields.  Prom may look at this stuff for debugging only.
  43  * Access this structure through the ca_kernel_private ptr.
  44  */
  45
  46 struct tioca_common ;
  47
  48 struct tioca_kernel {
  49         struct tioca_common     *ca_common;     /* tioca this belongs to */
  50         struct list_head        ca_list;        /* list of all ca's */
  51         struct list_head        ca_dmamaps;
  52         spinlock_t              ca_lock;        /* Kernel lock */
  53         cnodeid_t               ca_closest_node;
  54         struct list_head        *ca_devices;    /* bus->devices */
  55
  56         /*
  57          * General GART stuff
  58          */
  59         u64     ca_ap_size;             /* size of aperature in bytes */
  60         u32     ca_gart_entries;        /* # u64 entries in gart */
  61         u32     ca_ap_pagesize;         /* aperature page size in bytes */
  62         u64     ca_ap_bus_base;         /* bus address of CA aperature */
  63         u64     ca_gart_size;           /* gart size in bytes */
  64         u64     *ca_gart;               /* gart table vaddr */
  65         u64     ca_gart_coretalk_addr;  /* gart coretalk addr */
  66         u8              ca_gart_iscoherent;     /* used in tioca_tlbflush */
  67
  68         /* PCI GART convenience values */
  69         u64     ca_pciap_base;          /* pci aperature bus base address */
  70         u64     ca_pciap_size;          /* pci aperature size (bytes) */
  71         u64     ca_pcigart_base;        /* gfx GART bus base address */
  72         u64     *ca_pcigart;            /* gfx GART vm address */
  73         u32     ca_pcigart_entries;
  74         u32     ca_pcigart_start;       /* PCI start index in ca_gart */
  75         void            *ca_pcigart_pagemap;
  76
  77         /* AGP GART convenience values */
  78         u64     ca_gfxap_base;          /* gfx aperature bus base address */
  79         u64     ca_gfxap_size;          /* gfx aperature size (bytes) */
  80         u64     ca_gfxgart_base;        /* gfx GART bus base address */
  81         u64     *ca_gfxgart;            /* gfx GART vm address */
  82         u32     ca_gfxgart_entries;
  83         u32     ca_gfxgart_start;       /* agpgart start index in ca_gart */
  84 };
  85
  86 /*
  87  * Common tioca info shared between kernel and prom
  88  *
  89  * DO NOT CHANGE THIS STRUCT WITHOUT MAKING CORRESPONDING CHANGES
  90  * TO THE PROM VERSION.
  91  */
  92
  93 struct tioca_common {
  94         struct pcibus_bussoft   ca_common;      /* common pciio header */
  95
  96         u32             ca_rev;
  97         u32             ca_closest_nasid;
  98
  99         u64             ca_prom_private;
 100         u64             ca_kernel_private;
 101 };
 102
 103 /**
 104  * tioca_paddr_to_gart - Convert an SGI coretalk address to a CA GART entry
 105  * @paddr: page address to convert
 106  *
 107  * Convert a system [coretalk] address to a GART entry.  GART entries are
 108  * formed using the following:
 109  *
 110  *     data = ( (1<<63) |  ( (REMAP_NODE_ID << 40) | (MD_CHIPLET_ID << 38) |
 111  * (REMAP_SYS_ADDR) ) >> 12 )
 112  *
 113  * DATA written to 1 GART TABLE Entry in system memory is remapped system
 114  * addr for 1 page
 115  *
 116  * The data is for coretalk address format right shifted 12 bits with a
 117  * valid bit.
 118  *
 119  *      GART_TABLE_ENTRY [ 25:0 ]  -- REMAP_SYS_ADDRESS[37:12].
 120  *      GART_TABLE_ENTRY [ 27:26 ] -- SHUB MD chiplet id.
 121  *      GART_TABLE_ENTRY [ 41:28 ] -- REMAP_NODE_ID.
 122  *      GART_TABLE_ENTRY [ 63 ]    -- Valid Bit
 123  */
 124 static inline u64
 125 tioca_paddr_to_gart(unsigned long paddr)
 126 {
 127         /*
 128          * We are assuming right now that paddr already has the correct
 129          * format since the address from xtalk_dmaXXX should already have
 130          * NODE_ID, CHIPLET_ID, and SYS_ADDR in the correct locations.
 131          */
 132
 133         return ((paddr) >> 12) | (1UL << 63);
 134 }
 135
 136 /**
 137  * tioca_physpage_to_gart - Map a host physical page for SGI CA based DMA
 138  * @page_addr: system page address to map
 139  */
 140
 141 static inline unsigned long
 142 tioca_physpage_to_gart(u64 page_addr)
 143 {
 144         u64 coretalk_addr;
 145
 146         coretalk_addr = PHYS_TO_TIODMA(page_addr);
 147         if (!coretalk_addr) {
 148                 return 0;
 149         }
 150
 151         return tioca_paddr_to_gart(coretalk_addr);
 152 }
 153
 154 /**
 155  * tioca_tlbflush - invalidate cached SGI CA GART TLB entries
 156  * @tioca_kernel: CA context
 157  *
 158  * Invalidate tlb entries for a given CA GART.  Main complexity is to account
 159  * for revA bug.
 160  */
 161 static inline void
 162 tioca_tlbflush(struct tioca_kernel *tioca_kernel)
 163 {
 164         volatile u64 tmp;
 165         volatile struct tioca *ca_base;
 166         struct tioca_common *tioca_common;
 167
 168         tioca_common = tioca_kernel->ca_common;
 169         ca_base = (struct tioca *)tioca_common->ca_common.bs_base;
 170
 171         /*
 172          * Explicit flushes not needed if GART is in cached mode
 173          */
 174         if (tioca_kernel->ca_gart_iscoherent) {
 175                 if (TIOCA_WAR_ENABLED(PV910244, tioca_common)) {
 176                         /*
 177                          * PV910244:  RevA CA needs explicit flushes.
 178                          * Need to put GART into uncached mode before
 179                          * flushing otherwise the explicit flush is ignored.
 180                          *
 181                          * Alternate WAR would be to leave GART cached and
 182                          * touch every CL aligned GART entry.
 183                          */
 184
 185                         __sn_clrq_relaxed(&ca_base->ca_control2, CA_GART_MEM_PARAM);
 186                         __sn_setq_relaxed(&ca_base->ca_control2, CA_GART_FLUSH_TLB);
 187                         __sn_setq_relaxed(&ca_base->ca_control2,
 188                             (0x2ull << CA_GART_MEM_PARAM_SHFT));
 189                         tmp = __sn_readq_relaxed(&ca_base->ca_control2);
 190                 }
 191
 192                 return;
 193         }
 194
 195         /*
 196          * Gart in uncached mode ... need an explicit flush.
 197          */
 198
 199         __sn_setq_relaxed(&ca_base->ca_control2, CA_GART_FLUSH_TLB);
 200         tmp = __sn_readq_relaxed(&ca_base->ca_control2);
 201 }
 202
 203 extern u32      tioca_gart_found;
 204 extern struct list_head tioca_list;
 205 extern int tioca_init_provider(void);
 206 extern void tioca_fastwrite_enable(struct tioca_kernel *tioca_kern);
 207 #endif /* _ASM_IA64_SN_TIO_CA_AGP_PROVIDER_H */