arch/powerpc/platforms/powernv/pci.h

   1 #ifndef __POWERNV_PCI_H
   2 #define __POWERNV_PCI_H
   3
   4 #include <linux/iommu.h>
   5 #include <asm/iommu.h>
   6 #include <asm/msi_bitmap.h>
   7
   8 struct pci_dn;
   9
  10 enum pnv_phb_type {
  11         PNV_PHB_IODA1   = 0,
  12         PNV_PHB_IODA2   = 1,
  13         PNV_PHB_NPU     = 2,
  14 };
  15
  16 /* Precise PHB model for error management */
  17 enum pnv_phb_model {
  18         PNV_PHB_MODEL_UNKNOWN,
  19         PNV_PHB_MODEL_P7IOC,
  20         PNV_PHB_MODEL_PHB3,
  21         PNV_PHB_MODEL_NPU,
  22 };
  23
  24 #define PNV_PCI_DIAG_BUF_SIZE   8192
  25 #define PNV_IODA_PE_DEV         (1 << 0)        /* PE has single PCI device     */
  26 #define PNV_IODA_PE_BUS         (1 << 1)        /* PE has primary PCI bus       */
  27 #define PNV_IODA_PE_BUS_ALL     (1 << 2)        /* PE has subordinate buses     */
  28 #define PNV_IODA_PE_MASTER      (1 << 3)        /* Master PE in compound case   */
  29 #define PNV_IODA_PE_SLAVE       (1 << 4)        /* Slave PE in compound case    */
  30 #define PNV_IODA_PE_VF          (1 << 5)        /* PE for one VF                */
  31
  32 /* Data associated with a PE, including IOMMU tracking etc.. */
  33 struct pnv_phb;
  34 struct pnv_ioda_pe {
  35         unsigned long           flags;
  36         struct pnv_phb          *phb;
  37         int                     device_count;
  38
  39         /* A PE can be associated with a single device or an
  40          * entire bus (& children). In the former case, pdev
  41          * is populated, in the later case, pbus is.
  42          */
  43 #ifdef CONFIG_PCI_IOV
  44         struct pci_dev          *parent_dev;
  45 #endif
  46         struct pci_dev          *pdev;
  47         struct pci_bus          *pbus;
  48
  49         /* Effective RID (device RID for a device PE and base bus
  50          * RID with devfn 0 for a bus PE)
  51          */
  52         unsigned int            rid;
  53
  54         /* PE number */
  55         unsigned int            pe_number;
  56
  57         /* "Base" iommu table, ie, 4K TCEs, 32-bit DMA */
  58         struct iommu_table_group table_group;
  59
  60         /* 64-bit TCE bypass region */
  61         bool                    tce_bypass_enabled;
  62         uint64_t                tce_bypass_base;
  63
  64         /* MSIs. MVE index is identical for for 32 and 64 bit MSI
  65          * and -1 if not supported. (It's actually identical to the
  66          * PE number)
  67          */
  68         int                     mve_number;
  69
  70         /* PEs in compound case */
  71         struct pnv_ioda_pe      *master;
  72         struct list_head        slaves;
  73
  74         /* Link in list of PE#s */
  75         struct list_head        list;
  76 };
  77
  78 #define PNV_PHB_FLAG_EEH        (1 << 0)
  79 #define PNV_PHB_FLAG_CXL        (1 << 1) /* Real PHB supporting the cxl kernel API */
  80
  81 struct pnv_phb {
  82         struct pci_controller   *hose;
  83         enum pnv_phb_type       type;
  84         enum pnv_phb_model      model;
  85         u64                     hub_id;
  86         u64                     opal_id;
  87         int                     flags;
  88         void __iomem            *regs;
  89         u64                     regs_phys;
  90         int                     initialized;
  91         spinlock_t              lock;
  92
  93 #ifdef CONFIG_DEBUG_FS
  94         int                     has_dbgfs;
  95         struct dentry           *dbgfs;
  96 #endif
  97
  98 #ifdef CONFIG_PCI_MSI
  99         unsigned int            msi_base;
 100         unsigned int            msi32_support;
 101         struct msi_bitmap       msi_bmp;
 102 #endif
 103         int (*msi_setup)(struct pnv_phb *phb, struct pci_dev *dev,
 104                          unsigned int hwirq, unsigned int virq,
 105                          unsigned int is_64, struct msi_msg *msg);
 106         void (*dma_dev_setup)(struct pnv_phb *phb, struct pci_dev *pdev);
 107         void (*fixup_phb)(struct pci_controller *hose);
 108         int (*init_m64)(struct pnv_phb *phb);
 109         void (*reserve_m64_pe)(struct pci_bus *bus,
 110                                unsigned long *pe_bitmap, bool all);
 111         struct pnv_ioda_pe *(*pick_m64_pe)(struct pci_bus *bus, bool all);
 112         int (*get_pe_state)(struct pnv_phb *phb, int pe_no);
 113         void (*freeze_pe)(struct pnv_phb *phb, int pe_no);
 114         int (*unfreeze_pe)(struct pnv_phb *phb, int pe_no, int opt);
 115
 116         struct {
 117                 /* Global bridge info */
 118                 unsigned int            total_pe_num;
 119                 unsigned int            reserved_pe_idx;
 120                 unsigned int            root_pe_idx;
 121                 bool                    root_pe_populated;
 122
 123                 /* 32-bit MMIO window */
 124                 unsigned int            m32_size;
 125                 unsigned int            m32_segsize;
 126                 unsigned int            m32_pci_base;
 127
 128                 /* 64-bit MMIO window */
 129                 unsigned int            m64_bar_idx;
 130                 unsigned long           m64_size;
 131                 unsigned long           m64_segsize;
 132                 unsigned long           m64_base;
 133                 unsigned long           m64_bar_alloc;
 134
 135                 /* IO ports */
 136                 unsigned int            io_size;
 137                 unsigned int            io_segsize;
 138                 unsigned int            io_pci_base;
 139
 140                 /* PE allocation */
 141                 struct mutex            pe_alloc_mutex;
 142                 unsigned long           *pe_alloc;
 143                 struct pnv_ioda_pe      *pe_array;
 144
 145                 /* M32 & IO segment maps */
 146                 unsigned int            *m64_segmap;
 147                 unsigned int            *m32_segmap;
 148                 unsigned int            *io_segmap;
 149
 150                 /* DMA32 segment maps - IODA1 only */
 151                 unsigned int            dma32_count;
 152                 unsigned int            *dma32_segmap;
 153
 154                 /* IRQ chip */
 155                 int                     irq_chip_init;
 156                 struct irq_chip         irq_chip;
 157
 158                 /* Sorted list of used PE's based
 159                  * on the sequence of creation
 160                  */
 161                 struct list_head        pe_list;
 162                 struct mutex            pe_list_mutex;
 163
 164                 /* Reverse map of PEs, indexed by {bus, devfn} */
 165                 unsigned int            pe_rmap[0x10000];
 166         } ioda;
 167
 168         /* PHB and hub status structure */
 169         union {
 170                 unsigned char                   blob[PNV_PCI_DIAG_BUF_SIZE];
 171                 struct OpalIoP7IOCPhbErrorData  p7ioc;
 172                 struct OpalIoPhb3ErrorData      phb3;
 173                 struct OpalIoP7IOCErrorData     hub_diag;
 174         } diag;
 175
 176 #ifdef CONFIG_CXL_BASE
 177         struct cxl_afu *cxl_afu;
 178 #endif
 179 };
 180
 181 extern struct pci_ops pnv_pci_ops;
 182 extern int pnv_tce_build(struct iommu_table *tbl, long index, long npages,
 183                 unsigned long uaddr, enum dma_data_direction direction,
 184                 unsigned long attrs);
 185 extern void pnv_tce_free(struct iommu_table *tbl, long index, long npages);
 186 extern int pnv_tce_xchg(struct iommu_table *tbl, long index,
 187                 unsigned long *hpa, enum dma_data_direction *direction);
 188 extern unsigned long pnv_tce_get(struct iommu_table *tbl, long index);
 189
 190 void pnv_pci_dump_phb_diag_data(struct pci_controller *hose,
 191                                 unsigned char *log_buff);
 192 int pnv_pci_cfg_read(struct pci_dn *pdn,
 193                      int where, int size, u32 *val);
 194 int pnv_pci_cfg_write(struct pci_dn *pdn,
 195                       int where, int size, u32 val);
 196 extern struct iommu_table *pnv_pci_table_alloc(int nid);
 197
 198 extern long pnv_pci_link_table_and_group(int node, int num,
 199                 struct iommu_table *tbl,
 200                 struct iommu_table_group *table_group);
 201 extern void pnv_pci_unlink_table_and_group(struct iommu_table *tbl,
 202                 struct iommu_table_group *table_group);
 203 extern void pnv_pci_setup_iommu_table(struct iommu_table *tbl,
 204                                       void *tce_mem, u64 tce_size,
 205                                       u64 dma_offset, unsigned page_shift);
 206 extern void pnv_pci_init_ioda_hub(struct device_node *np);
 207 extern void pnv_pci_init_ioda2_phb(struct device_node *np);
 208 extern void pnv_pci_init_npu_phb(struct device_node *np);
 209 extern void pnv_pci_reset_secondary_bus(struct pci_dev *dev);
 210 extern int pnv_eeh_phb_reset(struct pci_controller *hose, int option);
 211
 212 extern void pnv_pci_dma_dev_setup(struct pci_dev *pdev);
 213 extern void pnv_pci_dma_bus_setup(struct pci_bus *bus);
 214 extern int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type);
 215 extern void pnv_teardown_msi_irqs(struct pci_dev *pdev);
 216 extern struct pnv_ioda_pe *pnv_ioda_get_pe(struct pci_dev *dev);
 217 extern void pnv_set_msi_irq_chip(struct pnv_phb *phb, unsigned int virq);
 218 extern bool pnv_pci_enable_device_hook(struct pci_dev *dev);
 219
 220 extern void pe_level_printk(const struct pnv_ioda_pe *pe, const char *level,
 221                             const char *fmt, ...);
 222 #define pe_err(pe, fmt, ...)                                    \
 223         pe_level_printk(pe, KERN_ERR, fmt, ##__VA_ARGS__)
 224 #define pe_warn(pe, fmt, ...)                                   \
 225         pe_level_printk(pe, KERN_WARNING, fmt, ##__VA_ARGS__)
 226 #define pe_info(pe, fmt, ...)                                   \
 227         pe_level_printk(pe, KERN_INFO, fmt, ##__VA_ARGS__)
 228
 229 /* Nvlink functions */
 230 extern void pnv_npu_try_dma_set_bypass(struct pci_dev *gpdev, bool bypass);
 231 extern void pnv_pci_phb3_tce_invalidate_entire(struct pnv_phb *phb, bool rm);
 232 extern struct pnv_ioda_pe *pnv_pci_npu_setup_iommu(struct pnv_ioda_pe *npe);
 233 extern long pnv_npu_set_window(struct pnv_ioda_pe *npe, int num,
 234                 struct iommu_table *tbl);
 235 extern long pnv_npu_unset_window(struct pnv_ioda_pe *npe, int num);
 236 extern void pnv_npu_take_ownership(struct pnv_ioda_pe *npe);
 237 extern void pnv_npu_release_ownership(struct pnv_ioda_pe *npe);
 238
 239
 240 /* cxl functions */
 241 extern bool pnv_cxl_enable_device_hook(struct pci_dev *dev);
 242 extern void pnv_cxl_disable_device(struct pci_dev *dev);
 243 extern int pnv_cxl_cx4_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type);
 244 extern void pnv_cxl_cx4_teardown_msi_irqs(struct pci_dev *pdev);
 245
 246
 247 /* phb ops (cxl switches these when enabling the kernel api on the phb) */
 248 extern const struct pci_controller_ops pnv_cxl_cx4_ioda_controller_ops;
 249
 250 #endif /* __POWERNV_PCI_H */