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> 12bd3a1725SMartin Schwidefsky #include <asm/sclp.h> 13c6557e7fSMartin Schwidefsky 14cd248341SJan Glauber #define PCIBIOS_MIN_IO 0x1000 15cd248341SJan Glauber #define PCIBIOS_MIN_MEM 0x10000000 16cd248341SJan Glauber 17cd248341SJan Glauber #define pcibios_assign_all_busses() (0) 18cd248341SJan Glauber 19cd248341SJan Glauber void __iomem *pci_iomap(struct pci_dev *, int, unsigned long); 20cd248341SJan Glauber void pci_iounmap(struct pci_dev *, void __iomem *); 21cd248341SJan Glauber int pci_domain_nr(struct pci_bus *); 22cd248341SJan Glauber int pci_proc_domain(struct pci_bus *); 23cd248341SJan Glauber 24cd248341SJan Glauber #define ZPCI_BUS_NR 0 /* default bus number */ 25cd248341SJan Glauber #define ZPCI_DEVFN 0 /* default device 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, 89783684f1SSebastian Ott ZPCI_FN_STATE_ONLINE = 3, 90cd248341SJan Glauber }; 91cd248341SJan Glauber 92cd248341SJan Glauber struct zpci_bar_struct { 937a572a3aSSebastian Ott struct resource *res; /* bus resource */ 9471ba41c9SSebastian Ott void __iomem *mio_wb; 9571ba41c9SSebastian Ott void __iomem *mio_wt; 96cd248341SJan Glauber u32 val; /* bar start & 3 flag bits */ 97cd248341SJan Glauber u16 map_idx; /* index into bar mapping array */ 987a572a3aSSebastian Ott u8 size; /* order 2 exponent */ 99cd248341SJan Glauber }; 100cd248341SJan Glauber 1018128f23cSGerald Schaefer struct s390_domain; 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; 11005bc1be6SPierre Morel int pchid; 11105bc1be6SPierre Morel int domain_nr; 11205bc1be6SPierre Morel enum pci_bus_speed max_bus_speed; 11305bc1be6SPierre Morel }; 11405bc1be6SPierre Morel 115cd248341SJan Glauber /* Private data per function */ 116cd248341SJan Glauber struct zpci_dev { 11705bc1be6SPierre Morel struct zpci_bus *zbus; 118cd248341SJan Glauber struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ 11905bc1be6SPierre Morel struct kref kref; 120035f212fSPierre Morel struct hotplug_slot hotplug_slot; 121cd248341SJan Glauber 122cd248341SJan Glauber enum zpci_state state; 123cd248341SJan Glauber u32 fid; /* function ID, used by sclp */ 124cd248341SJan Glauber u32 fh; /* function handle, used by insn's */ 125ac4995b9SSebastian Ott u16 vfn; /* virtual function number */ 126cd248341SJan Glauber u16 pchid; /* physical channel ID */ 127cd248341SJan Glauber u8 pfgid; /* function group ID */ 128ac4995b9SSebastian Ott u8 pft; /* pci function type */ 129e6ab7490SAlexander Schmidt u8 port; 130c9a1752bSPierre Morel u8 rid_available : 1; 131c9a1752bSPierre Morel u8 reserved : 7; 132c9a1752bSPierre Morel unsigned int devfn; /* DEVFN part of the RID*/ 133cd248341SJan Glauber 13480ed156aSSebastian Ott struct mutex lock; 135ac4995b9SSebastian Ott u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */ 136ac4995b9SSebastian Ott u32 uid; /* user defined id */ 137ac4995b9SSebastian Ott u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */ 138ac4995b9SSebastian Ott 1399a4da8a5SJan Glauber /* IRQ stuff */ 1409a4da8a5SJan Glauber u64 msi_addr; /* MSI address */ 141b19148f6SSebastian Ott unsigned int max_msi; /* maximum number of MSI's */ 142e979ce7bSSebastian Ott unsigned int msi_first_bit; 143e979ce7bSSebastian Ott unsigned int msi_nr_irqs; 1445d0d8f43SMartin Schwidefsky struct airq_iv *aibv; /* adapter interrupt bit vector */ 145795818e8SSebastian Ott unsigned long aisb; /* number of the summary bit */ 1469a4da8a5SJan Glauber 147828b35f6SJan Glauber /* DMA stuff */ 148828b35f6SJan Glauber unsigned long *dma_table; 149828b35f6SJan Glauber spinlock_t dma_table_lock; 150828b35f6SJan Glauber int tlb_refresh; 151828b35f6SJan Glauber 152828b35f6SJan Glauber spinlock_t iommu_bitmap_lock; 153828b35f6SJan Glauber unsigned long *iommu_bitmap; 15413954fd6SSebastian Ott unsigned long *lazy_bitmap; 155828b35f6SJan Glauber unsigned long iommu_size; 156828b35f6SJan Glauber unsigned long iommu_pages; 157828b35f6SJan Glauber unsigned int next_bit; 158828b35f6SJan Glauber 159f42c2235SJoerg Roedel struct iommu_device iommu_dev; /* IOMMU core handle */ 160f42c2235SJoerg Roedel 1617a572a3aSSebastian Ott char res_name[16]; 16271ba41c9SSebastian Ott bool mio_capable; 163c9c13ba4SDenis Efremov struct zpci_bar_struct bars[PCI_STD_NUM_BARS]; 164cd248341SJan Glauber 165828b35f6SJan Glauber u64 start_dma; /* Start of available DMA addresses */ 166828b35f6SJan Glauber u64 end_dma; /* End of available DMA addresses */ 167828b35f6SJan Glauber u64 dma_mask; /* DMA address space mask */ 168828b35f6SJan Glauber 169d0b08853SJan Glauber /* Function measurement block */ 170d0b08853SJan Glauber struct zpci_fmb *fmb; 171d0b08853SJan Glauber u16 fmb_update; /* update interval */ 1720b7589ecSSebastian Ott u16 fmb_length; 1736001018aSSebastian Ott /* software counters */ 1746001018aSSebastian Ott atomic64_t allocated_pages; 1756001018aSSebastian Ott atomic64_t mapped_pages; 1766001018aSSebastian Ott atomic64_t unmapped_pages; 177d0b08853SJan Glauber 178cd248341SJan Glauber enum pci_bus_speed max_bus_speed; 179d0b08853SJan Glauber 180d0b08853SJan Glauber struct dentry *debugfs_dev; 1818128f23cSGerald Schaefer 1828128f23cSGerald Schaefer struct s390_domain *s390_domain; /* s390 IOMMU domain data */ 183cd248341SJan Glauber }; 184cd248341SJan Glauber 185cd248341SJan Glauber static inline bool zdev_enabled(struct zpci_dev *zdev) 186cd248341SJan Glauber { 187cd248341SJan Glauber return (zdev->fh & (1UL << 31)) ? true : false; 188cd248341SJan Glauber } 189cd248341SJan Glauber 19093065d04SSebastian Ott extern const struct attribute_group *zpci_attr_groups[]; 191fbfe07d4SSebastian Ott extern unsigned int s390_pci_force_floating __initdata; 1926cf17f9aSPierre Morel extern unsigned int s390_pci_no_rid; 19393065d04SSebastian Ott 194cd248341SJan Glauber /* ----------------------------------------------------------------------------- 195cd248341SJan Glauber Prototypes 196cd248341SJan Glauber ----------------------------------------------------------------------------- */ 197cd248341SJan Glauber /* Base stuff */ 198cd248341SJan Glauber int zpci_create_device(struct zpci_dev *); 199623bd44dSSebastian Ott void zpci_remove_device(struct zpci_dev *zdev); 200cd248341SJan Glauber int zpci_enable_device(struct zpci_dev *); 201cb65a669SSebastian Ott int zpci_disable_device(struct zpci_dev *); 202828b35f6SJan Glauber int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 203828b35f6SJan Glauber int zpci_unregister_ioat(struct zpci_dev *, u8); 20401553d9aSSebastian Ott void zpci_remove_reserved_devices(void); 205cd248341SJan Glauber 206a755a45dSJan Glauber /* CLP */ 2071d578966SSebastian Ott int clp_scan_pci_devices(void); 2081d578966SSebastian Ott int clp_rescan_pci_devices(void); 20917cdec96SNiklas Schnelle int clp_rescan_pci_devices_simple(u32 *fid); 210a755a45dSJan Glauber int clp_add_pci_device(u32, u32, int); 211a755a45dSJan Glauber int clp_enable_fh(struct zpci_dev *, u8); 212a755a45dSJan Glauber int clp_disable_fh(struct zpci_dev *); 213783684f1SSebastian Ott int clp_get_state(u32 fid, enum zpci_state *state); 214a755a45dSJan Glauber 2157a11c67aSNiklas Schnelle /* UID */ 2167a11c67aSNiklas Schnelle void update_uid_checking(bool new); 2177a11c67aSNiklas Schnelle 218f42c2235SJoerg Roedel /* IOMMU Interface */ 219f42c2235SJoerg Roedel int zpci_init_iommu(struct zpci_dev *zdev); 220f42c2235SJoerg Roedel void zpci_destroy_iommu(struct zpci_dev *zdev); 221f42c2235SJoerg Roedel 2229a17e972SSebastian Ott #ifdef CONFIG_PCI 223c7ff0e91SSebastian Ott static inline bool zpci_use_mio(struct zpci_dev *zdev) 224c7ff0e91SSebastian Ott { 225c7ff0e91SSebastian Ott return static_branch_likely(&have_mio) && zdev->mio_capable; 226c7ff0e91SSebastian Ott } 227c7ff0e91SSebastian Ott 228cbc0dd1fSJan Glauber /* Error handling and recovery */ 229cbc0dd1fSJan Glauber void zpci_event_error(void *); 230cbc0dd1fSJan Glauber void zpci_event_availability(void *); 23157b5918cSSebastian Ott void zpci_rescan(void); 232aa3b7c29SSebastian Ott bool zpci_is_enabled(void); 2339a17e972SSebastian Ott #else /* CONFIG_PCI */ 2349a17e972SSebastian Ott static inline void zpci_event_error(void *e) {} 2359a17e972SSebastian Ott static inline void zpci_event_availability(void *e) {} 23657b5918cSSebastian Ott static inline void zpci_rescan(void) {} 2379a17e972SSebastian Ott #endif /* CONFIG_PCI */ 238cbc0dd1fSJan Glauber 23967f43f38SSebastian Ott #ifdef CONFIG_HOTPLUG_PCI_S390 24067f43f38SSebastian Ott int zpci_init_slot(struct zpci_dev *); 24167f43f38SSebastian Ott void zpci_exit_slot(struct zpci_dev *); 24267f43f38SSebastian Ott #else /* CONFIG_HOTPLUG_PCI_S390 */ 24367f43f38SSebastian Ott static inline int zpci_init_slot(struct zpci_dev *zdev) 24467f43f38SSebastian Ott { 24567f43f38SSebastian Ott return 0; 24667f43f38SSebastian Ott } 24767f43f38SSebastian Ott static inline void zpci_exit_slot(struct zpci_dev *zdev) {} 24867f43f38SSebastian Ott #endif /* CONFIG_HOTPLUG_PCI_S390 */ 24967f43f38SSebastian Ott 250cd248341SJan Glauber /* Helpers */ 251198a5278SSebastian Ott static inline struct zpci_dev *to_zpci(struct pci_dev *pdev) 252198a5278SSebastian Ott { 25305bc1be6SPierre Morel struct zpci_bus *zbus = pdev->sysdata; 25405bc1be6SPierre Morel 25505bc1be6SPierre Morel return zbus->function[ZPCI_DEVFN]; 256198a5278SSebastian Ott } 257198a5278SSebastian Ott 258d08d6f5dSPierre Morel static inline struct zpci_dev *to_zpci_dev(struct device *dev) 259d08d6f5dSPierre Morel { 260d08d6f5dSPierre Morel return to_zpci(to_pci_dev(dev)); 261d08d6f5dSPierre Morel } 262d08d6f5dSPierre Morel 263cd248341SJan Glauber struct zpci_dev *get_zdev_by_fid(u32); 264cd248341SJan Glauber 265828b35f6SJan Glauber /* DMA */ 266828b35f6SJan Glauber int zpci_dma_init(void); 267828b35f6SJan Glauber void zpci_dma_exit(void); 268828b35f6SJan Glauber 269c840927cSSebastian Ott int __init zpci_irq_init(void); 270c840927cSSebastian Ott void __init zpci_irq_exit(void); 271c840927cSSebastian Ott 272d0b08853SJan Glauber /* FMB */ 273d0b08853SJan Glauber int zpci_fmb_enable_device(struct zpci_dev *); 274d0b08853SJan Glauber int zpci_fmb_disable_device(struct zpci_dev *); 275d0b08853SJan Glauber 276d0b08853SJan Glauber /* Debug */ 277d0b08853SJan Glauber int zpci_debug_init(void); 278d0b08853SJan Glauber void zpci_debug_exit(void); 2799a99649fSSebastian Ott void zpci_debug_init_device(struct zpci_dev *, const char *); 280d0b08853SJan Glauber void zpci_debug_exit_device(struct zpci_dev *); 281d0b08853SJan Glauber void zpci_debug_info(struct zpci_dev *, struct seq_file *); 282d0b08853SJan Glauber 283bd3a1725SMartin Schwidefsky /* Error reporting */ 284bd3a1725SMartin Schwidefsky int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *); 285bd3a1725SMartin Schwidefsky 2863a368f74SPhilipp Hachtmann #ifdef CONFIG_NUMA 2873a368f74SPhilipp Hachtmann 2883a368f74SPhilipp Hachtmann /* Returns the node based on PCI bus */ 2893a368f74SPhilipp Hachtmann static inline int __pcibus_to_node(const struct pci_bus *bus) 2903a368f74SPhilipp Hachtmann { 2913a368f74SPhilipp Hachtmann return NUMA_NO_NODE; 2923a368f74SPhilipp Hachtmann } 2933a368f74SPhilipp Hachtmann 2943a368f74SPhilipp Hachtmann static inline const struct cpumask * 2953a368f74SPhilipp Hachtmann cpumask_of_pcibus(const struct pci_bus *bus) 2963a368f74SPhilipp Hachtmann { 2973a368f74SPhilipp Hachtmann return cpu_online_mask; 2983a368f74SPhilipp Hachtmann } 2993a368f74SPhilipp Hachtmann 3003a368f74SPhilipp Hachtmann #endif /* CONFIG_NUMA */ 3013a368f74SPhilipp Hachtmann 302cd248341SJan Glauber #endif 303