1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2c6557e7fSMartin Schwidefsky #ifndef __ASM_S390_PCI_H 3c6557e7fSMartin Schwidefsky #define __ASM_S390_PCI_H 4c6557e7fSMartin Schwidefsky 557b5918cSSebastian Ott #include <linux/pci.h> 680ed156aSSebastian Ott #include <linux/mutex.h> 7f42c2235SJoerg Roedel #include <linux/iommu.h> 8035f212fSPierre Morel #include <linux/pci_hotplug.h> 9cd248341SJan Glauber #include <asm-generic/pci.h> 10a755a45dSJan Glauber #include <asm/pci_clp.h> 11d0b08853SJan Glauber #include <asm/pci_debug.h> 1298b1d33dSMatthew Rosato #include <asm/pci_insn.h> 13bd3a1725SMartin Schwidefsky #include <asm/sclp.h> 14c6557e7fSMartin Schwidefsky 15cd248341SJan Glauber #define PCIBIOS_MIN_IO 0x1000 16cd248341SJan Glauber #define PCIBIOS_MIN_MEM 0x10000000 17cd248341SJan Glauber 18cd248341SJan Glauber #define pcibios_assign_all_busses() (0) 19cd248341SJan Glauber 20cd248341SJan Glauber void __iomem *pci_iomap(struct pci_dev *, int, unsigned long); 21cd248341SJan Glauber void pci_iounmap(struct pci_dev *, void __iomem *); 22cd248341SJan Glauber int pci_domain_nr(struct pci_bus *); 23cd248341SJan Glauber int pci_proc_domain(struct pci_bus *); 24cd248341SJan Glauber 25cd248341SJan Glauber #define ZPCI_BUS_NR 0 /* default bus number */ 26cd248341SJan Glauber 27c840927cSSebastian Ott #define ZPCI_NR_DMA_SPACES 1 28c840927cSSebastian Ott #define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS 29969ae01bSNiklas Schnelle #define ZPCI_DOMAIN_BITMAP_SIZE (1 << 16) 30c840927cSSebastian Ott 3105bc1be6SPierre Morel #ifdef PCI 3205bc1be6SPierre Morel #if (ZPCI_NR_DEVICES > ZPCI_DOMAIN_BITMAP_SIZE) 3305bc1be6SPierre Morel # error ZPCI_NR_DEVICES can not be bigger than ZPCI_DOMAIN_BITMAP_SIZE 3405bc1be6SPierre Morel #endif 3505bc1be6SPierre Morel #endif /* PCI */ 3605bc1be6SPierre Morel 37cd248341SJan Glauber /* PCI Function Controls */ 38cd248341SJan Glauber #define ZPCI_FC_FN_ENABLED 0x80 39cd248341SJan Glauber #define ZPCI_FC_ERROR 0x40 40cd248341SJan Glauber #define ZPCI_FC_BLOCKED 0x20 41cd248341SJan Glauber #define ZPCI_FC_DMA_ENABLED 0x10 42cd248341SJan Glauber 43f9dc447eSSebastian Ott #define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23) 44f9dc447eSSebastian Ott 45f9dc447eSSebastian Ott struct zpci_fmb_fmt0 { 46f9dc447eSSebastian Ott u64 dma_rbytes; 47f9dc447eSSebastian Ott u64 dma_wbytes; 48f9dc447eSSebastian Ott }; 49f9dc447eSSebastian Ott 50f9dc447eSSebastian Ott struct zpci_fmb_fmt1 { 51f9dc447eSSebastian Ott u64 rx_bytes; 52f9dc447eSSebastian Ott u64 rx_packets; 53f9dc447eSSebastian Ott u64 tx_bytes; 54f9dc447eSSebastian Ott u64 tx_packets; 55f9dc447eSSebastian Ott }; 56f9dc447eSSebastian Ott 57f9dc447eSSebastian Ott struct zpci_fmb_fmt2 { 58f9dc447eSSebastian Ott u64 consumed_work_units; 59f9dc447eSSebastian Ott u64 max_work_units; 60f9dc447eSSebastian Ott }; 61f9dc447eSSebastian Ott 620ac94282SSebastian Ott struct zpci_fmb_fmt3 { 630ac94282SSebastian Ott u64 tx_bytes; 640ac94282SSebastian Ott }; 650ac94282SSebastian Ott 66d0b08853SJan Glauber struct zpci_fmb { 67d0b08853SJan Glauber u32 format : 8; 68f9dc447eSSebastian Ott u32 fmt_ind : 24; 69d0b08853SJan Glauber u32 samples; 70d0b08853SJan Glauber u64 last_update; 71f9dc447eSSebastian Ott /* common counters */ 72d0b08853SJan Glauber u64 ld_ops; 73d0b08853SJan Glauber u64 st_ops; 74d0b08853SJan Glauber u64 stb_ops; 75d0b08853SJan Glauber u64 rpcit_ops; 76f9dc447eSSebastian Ott /* format specific counters */ 77f9dc447eSSebastian Ott union { 78f9dc447eSSebastian Ott struct zpci_fmb_fmt0 fmt0; 79f9dc447eSSebastian Ott struct zpci_fmb_fmt1 fmt1; 80f9dc447eSSebastian Ott struct zpci_fmb_fmt2 fmt2; 810ac94282SSebastian Ott struct zpci_fmb_fmt3 fmt3; 82f9dc447eSSebastian Ott }; 839d89d9e6SSebastian Ott } __packed __aligned(128); 84d0b08853SJan Glauber 85cd248341SJan Glauber enum zpci_state { 86783684f1SSebastian Ott ZPCI_FN_STATE_STANDBY = 0, 87783684f1SSebastian Ott ZPCI_FN_STATE_CONFIGURED = 1, 88783684f1SSebastian Ott ZPCI_FN_STATE_RESERVED = 2, 89cd248341SJan Glauber }; 90cd248341SJan Glauber 91cd248341SJan Glauber struct zpci_bar_struct { 927a572a3aSSebastian Ott struct resource *res; /* bus resource */ 9371ba41c9SSebastian Ott void __iomem *mio_wb; 9471ba41c9SSebastian Ott void __iomem *mio_wt; 95cd248341SJan Glauber u32 val; /* bar start & 3 flag bits */ 96cd248341SJan Glauber u16 map_idx; /* index into bar mapping array */ 977a572a3aSSebastian Ott u8 size; /* order 2 exponent */ 98cd248341SJan Glauber }; 99cd248341SJan Glauber 1008128f23cSGerald Schaefer struct s390_domain; 1016438e307SMatthew Rosato struct kvm_zdev; 1028128f23cSGerald Schaefer 10305bc1be6SPierre Morel #define ZPCI_FUNCTIONS_PER_BUS 256 10405bc1be6SPierre Morel struct zpci_bus { 10505bc1be6SPierre Morel struct kref kref; 10605bc1be6SPierre Morel struct pci_bus *bus; 10705bc1be6SPierre Morel struct zpci_dev *function[ZPCI_FUNCTIONS_PER_BUS]; 10805bc1be6SPierre Morel struct list_head resources; 10905bc1be6SPierre Morel struct list_head bus_next; 11065e450a9SPierre Morel struct resource bus_resource; 11105bc1be6SPierre Morel int pchid; 11205bc1be6SPierre Morel int domain_nr; 11344510d6fSPierre Morel bool multifunction; 11405bc1be6SPierre Morel enum pci_bus_speed max_bus_speed; 11505bc1be6SPierre Morel }; 11605bc1be6SPierre Morel 117cd248341SJan Glauber /* Private data per function */ 118cd248341SJan Glauber struct zpci_dev { 11905bc1be6SPierre Morel struct zpci_bus *zbus; 120cd248341SJan Glauber struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ 12144510d6fSPierre Morel struct list_head bus_next; 12205bc1be6SPierre Morel struct kref kref; 123035f212fSPierre Morel struct hotplug_slot hotplug_slot; 124cd248341SJan Glauber 125cd248341SJan Glauber enum zpci_state state; 126cd248341SJan Glauber u32 fid; /* function ID, used by sclp */ 127cd248341SJan Glauber u32 fh; /* function handle, used by insn's */ 128c68468edSMatthew Rosato u32 gisa; /* GISA designation for passthrough */ 129ac4995b9SSebastian Ott u16 vfn; /* virtual function number */ 130cd248341SJan Glauber u16 pchid; /* physical channel ID */ 131d1038467SMatthew Rosato u16 maxstbl; /* Maximum store block size */ 132cd248341SJan Glauber u8 pfgid; /* function group ID */ 133ac4995b9SSebastian Ott u8 pft; /* pci function type */ 134e6ab7490SAlexander Schmidt u8 port; 135d1038467SMatthew Rosato u8 dtsm; /* Supported DT mask */ 136c9a1752bSPierre Morel u8 rid_available : 1; 13744510d6fSPierre Morel u8 has_hp_slot : 1; 138a50297cfSNiklas Schnelle u8 has_resources : 1; 139e5794cf1SNiklas Schnelle u8 is_physfn : 1; 140517fe298SMatthew Rosato u8 util_str_avail : 1; 141c1e18c17SNiklas Schnelle u8 irqs_registered : 1; 142c1e18c17SNiklas Schnelle u8 reserved : 2; 143c9a1752bSPierre Morel unsigned int devfn; /* DEVFN part of the RID*/ 144cd248341SJan Glauber 14580ed156aSSebastian Ott struct mutex lock; 146ac4995b9SSebastian Ott u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */ 147ac4995b9SSebastian Ott u32 uid; /* user defined id */ 148ac4995b9SSebastian Ott u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */ 149ac4995b9SSebastian Ott 1509a4da8a5SJan Glauber /* IRQ stuff */ 1519a4da8a5SJan Glauber u64 msi_addr; /* MSI address */ 152b19148f6SSebastian Ott unsigned int max_msi; /* maximum number of MSI's */ 153e979ce7bSSebastian Ott unsigned int msi_first_bit; 154e979ce7bSSebastian Ott unsigned int msi_nr_irqs; 1555d0d8f43SMartin Schwidefsky struct airq_iv *aibv; /* adapter interrupt bit vector */ 156795818e8SSebastian Ott unsigned long aisb; /* number of the summary bit */ 1579a4da8a5SJan Glauber 158828b35f6SJan Glauber /* DMA stuff */ 159828b35f6SJan Glauber unsigned long *dma_table; 160828b35f6SJan Glauber spinlock_t dma_table_lock; 161828b35f6SJan Glauber int tlb_refresh; 162828b35f6SJan Glauber 163828b35f6SJan Glauber spinlock_t iommu_bitmap_lock; 164828b35f6SJan Glauber unsigned long *iommu_bitmap; 16513954fd6SSebastian Ott unsigned long *lazy_bitmap; 166828b35f6SJan Glauber unsigned long iommu_size; 167828b35f6SJan Glauber unsigned long iommu_pages; 168828b35f6SJan Glauber unsigned int next_bit; 169828b35f6SJan Glauber 170f42c2235SJoerg Roedel struct iommu_device iommu_dev; /* IOMMU core handle */ 171f42c2235SJoerg Roedel 1727a572a3aSSebastian Ott char res_name[16]; 17371ba41c9SSebastian Ott bool mio_capable; 174c9c13ba4SDenis Efremov struct zpci_bar_struct bars[PCI_STD_NUM_BARS]; 175cd248341SJan Glauber 176828b35f6SJan Glauber u64 start_dma; /* Start of available DMA addresses */ 177828b35f6SJan Glauber u64 end_dma; /* End of available DMA addresses */ 178828b35f6SJan Glauber u64 dma_mask; /* DMA address space mask */ 179828b35f6SJan Glauber 180d0b08853SJan Glauber /* Function measurement block */ 181d0b08853SJan Glauber struct zpci_fmb *fmb; 182d0b08853SJan Glauber u16 fmb_update; /* update interval */ 1830b7589ecSSebastian Ott u16 fmb_length; 1846001018aSSebastian Ott /* software counters */ 1856001018aSSebastian Ott atomic64_t allocated_pages; 1866001018aSSebastian Ott atomic64_t mapped_pages; 1876001018aSSebastian Ott atomic64_t unmapped_pages; 188d0b08853SJan Glauber 189dc8c638dSMatthew Rosato u8 version; 190cd248341SJan Glauber enum pci_bus_speed max_bus_speed; 191d0b08853SJan Glauber 192d0b08853SJan Glauber struct dentry *debugfs_dev; 1938128f23cSGerald Schaefer 1946438e307SMatthew Rosato /* IOMMU and passthrough */ 1958128f23cSGerald Schaefer struct s390_domain *s390_domain; /* s390 IOMMU domain data */ 1966438e307SMatthew Rosato struct kvm_zdev *kzdev; 197*09340b2fSMatthew Rosato struct mutex kzdev_lock; 198cd248341SJan Glauber }; 199cd248341SJan Glauber 200cd248341SJan Glauber static inline bool zdev_enabled(struct zpci_dev *zdev) 201cd248341SJan Glauber { 202cd248341SJan Glauber return (zdev->fh & (1UL << 31)) ? true : false; 203cd248341SJan Glauber } 204cd248341SJan Glauber 20593065d04SSebastian Ott extern const struct attribute_group *zpci_attr_groups[]; 206fbfe07d4SSebastian Ott extern unsigned int s390_pci_force_floating __initdata; 2076cf17f9aSPierre Morel extern unsigned int s390_pci_no_rid; 20893065d04SSebastian Ott 20998b1d33dSMatthew Rosato extern union zpci_sic_iib *zpci_aipb; 21098b1d33dSMatthew Rosato extern struct airq_iv *zpci_aif_sbv; 21198b1d33dSMatthew Rosato 212cd248341SJan Glauber /* ----------------------------------------------------------------------------- 213cd248341SJan Glauber Prototypes 214cd248341SJan Glauber ----------------------------------------------------------------------------- */ 215cd248341SJan Glauber /* Base stuff */ 21614c87ba8SNiklas Schnelle struct zpci_dev *zpci_create_device(u32 fid, u32 fh, enum zpci_state state); 217cd248341SJan Glauber int zpci_enable_device(struct zpci_dev *); 218cb65a669SSebastian Ott int zpci_disable_device(struct zpci_dev *); 219a7f82c36SNiklas Schnelle int zpci_scan_configured_device(struct zpci_dev *zdev, u32 fh); 2202631f6b6SNiklas Schnelle int zpci_deconfigure_device(struct zpci_dev *zdev); 221a46044a9SNiklas Schnelle void zpci_device_reserved(struct zpci_dev *zdev); 222a46044a9SNiklas Schnelle bool zpci_is_device_configured(struct zpci_dev *zdev); 2232631f6b6SNiklas Schnelle 224da995d53SNiklas Schnelle int zpci_hot_reset_device(struct zpci_dev *zdev); 225828b35f6SJan Glauber int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 226828b35f6SJan Glauber int zpci_unregister_ioat(struct zpci_dev *, u8); 22701553d9aSSebastian Ott void zpci_remove_reserved_devices(void); 2284fe20497SNiklas Schnelle void zpci_update_fh(struct zpci_dev *zdev, u32 fh); 229cd248341SJan Glauber 230a755a45dSJan Glauber /* CLP */ 231b02002ccSNiklas Schnelle int clp_setup_writeback_mio(void); 2321d578966SSebastian Ott int clp_scan_pci_devices(void); 233ba764dd7SNiklas Schnelle int clp_query_pci_fn(struct zpci_dev *zdev); 234cc049eecSNiklas Schnelle int clp_enable_fh(struct zpci_dev *zdev, u32 *fh, u8 nr_dma_as); 235cc049eecSNiklas Schnelle int clp_disable_fh(struct zpci_dev *zdev, u32 *fh); 236783684f1SSebastian Ott int clp_get_state(u32 fid, enum zpci_state *state); 237cc049eecSNiklas Schnelle int clp_refresh_fh(u32 fid, u32 *fh); 238a755a45dSJan Glauber 2397a11c67aSNiklas Schnelle /* UID */ 2407a11c67aSNiklas Schnelle void update_uid_checking(bool new); 2417a11c67aSNiklas Schnelle 242f42c2235SJoerg Roedel /* IOMMU Interface */ 243f42c2235SJoerg Roedel int zpci_init_iommu(struct zpci_dev *zdev); 244f42c2235SJoerg Roedel void zpci_destroy_iommu(struct zpci_dev *zdev); 245f42c2235SJoerg Roedel 2469a17e972SSebastian Ott #ifdef CONFIG_PCI 247c7ff0e91SSebastian Ott static inline bool zpci_use_mio(struct zpci_dev *zdev) 248c7ff0e91SSebastian Ott { 249c7ff0e91SSebastian Ott return static_branch_likely(&have_mio) && zdev->mio_capable; 250c7ff0e91SSebastian Ott } 251c7ff0e91SSebastian Ott 252cbc0dd1fSJan Glauber /* Error handling and recovery */ 253cbc0dd1fSJan Glauber void zpci_event_error(void *); 254cbc0dd1fSJan Glauber void zpci_event_availability(void *); 255aa3b7c29SSebastian Ott bool zpci_is_enabled(void); 2569a17e972SSebastian Ott #else /* CONFIG_PCI */ 2579a17e972SSebastian Ott static inline void zpci_event_error(void *e) {} 2589a17e972SSebastian Ott static inline void zpci_event_availability(void *e) {} 2599a17e972SSebastian Ott #endif /* CONFIG_PCI */ 260cbc0dd1fSJan Glauber 26167f43f38SSebastian Ott #ifdef CONFIG_HOTPLUG_PCI_S390 26267f43f38SSebastian Ott int zpci_init_slot(struct zpci_dev *); 26367f43f38SSebastian Ott void zpci_exit_slot(struct zpci_dev *); 26467f43f38SSebastian Ott #else /* CONFIG_HOTPLUG_PCI_S390 */ 26567f43f38SSebastian Ott static inline int zpci_init_slot(struct zpci_dev *zdev) 26667f43f38SSebastian Ott { 26767f43f38SSebastian Ott return 0; 26867f43f38SSebastian Ott } 26967f43f38SSebastian Ott static inline void zpci_exit_slot(struct zpci_dev *zdev) {} 27067f43f38SSebastian Ott #endif /* CONFIG_HOTPLUG_PCI_S390 */ 27167f43f38SSebastian Ott 272cd248341SJan Glauber /* Helpers */ 273198a5278SSebastian Ott static inline struct zpci_dev *to_zpci(struct pci_dev *pdev) 274198a5278SSebastian Ott { 27505bc1be6SPierre Morel struct zpci_bus *zbus = pdev->sysdata; 27605bc1be6SPierre Morel 27744510d6fSPierre Morel return zbus->function[pdev->devfn]; 278198a5278SSebastian Ott } 279198a5278SSebastian Ott 280d08d6f5dSPierre Morel static inline struct zpci_dev *to_zpci_dev(struct device *dev) 281d08d6f5dSPierre Morel { 282d08d6f5dSPierre Morel return to_zpci(to_pci_dev(dev)); 283d08d6f5dSPierre Morel } 284d08d6f5dSPierre Morel 285cd248341SJan Glauber struct zpci_dev *get_zdev_by_fid(u32); 286cd248341SJan Glauber 287828b35f6SJan Glauber /* DMA */ 288828b35f6SJan Glauber int zpci_dma_init(void); 289828b35f6SJan Glauber void zpci_dma_exit(void); 2901f3f7681SNiklas Schnelle int zpci_dma_init_device(struct zpci_dev *zdev); 2911f3f7681SNiklas Schnelle int zpci_dma_exit_device(struct zpci_dev *zdev); 292828b35f6SJan Glauber 293c1e18c17SNiklas Schnelle /* IRQ */ 294c840927cSSebastian Ott int __init zpci_irq_init(void); 295c840927cSSebastian Ott void __init zpci_irq_exit(void); 296c840927cSSebastian Ott 297d0b08853SJan Glauber /* FMB */ 298d0b08853SJan Glauber int zpci_fmb_enable_device(struct zpci_dev *); 299d0b08853SJan Glauber int zpci_fmb_disable_device(struct zpci_dev *); 300d0b08853SJan Glauber 301d0b08853SJan Glauber /* Debug */ 302d0b08853SJan Glauber int zpci_debug_init(void); 303d0b08853SJan Glauber void zpci_debug_exit(void); 3049a99649fSSebastian Ott void zpci_debug_init_device(struct zpci_dev *, const char *); 305d0b08853SJan Glauber void zpci_debug_exit_device(struct zpci_dev *); 306d0b08853SJan Glauber 3074cdf2f4eSNiklas Schnelle /* Error handling */ 308bd3a1725SMartin Schwidefsky int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *); 3094cdf2f4eSNiklas Schnelle int zpci_clear_error_state(struct zpci_dev *zdev); 3104cdf2f4eSNiklas Schnelle int zpci_reset_load_store_blocked(struct zpci_dev *zdev); 311bd3a1725SMartin Schwidefsky 3123a368f74SPhilipp Hachtmann #ifdef CONFIG_NUMA 3133a368f74SPhilipp Hachtmann 3143a368f74SPhilipp Hachtmann /* Returns the node based on PCI bus */ 3153a368f74SPhilipp Hachtmann static inline int __pcibus_to_node(const struct pci_bus *bus) 3163a368f74SPhilipp Hachtmann { 3173a368f74SPhilipp Hachtmann return NUMA_NO_NODE; 3183a368f74SPhilipp Hachtmann } 3193a368f74SPhilipp Hachtmann 3203a368f74SPhilipp Hachtmann static inline const struct cpumask * 3213a368f74SPhilipp Hachtmann cpumask_of_pcibus(const struct pci_bus *bus) 3223a368f74SPhilipp Hachtmann { 3233a368f74SPhilipp Hachtmann return cpu_online_mask; 3243a368f74SPhilipp Hachtmann } 3253a368f74SPhilipp Hachtmann 3263a368f74SPhilipp Hachtmann #endif /* CONFIG_NUMA */ 3273a368f74SPhilipp Hachtmann 328cd248341SJan Glauber #endif 329