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 5cd248341SJan Glauber /* must be set before including pci_clp.h */ 6cd248341SJan Glauber #define PCI_BAR_COUNT 6 7c6557e7fSMartin Schwidefsky 857b5918cSSebastian Ott #include <linux/pci.h> 980ed156aSSebastian Ott #include <linux/mutex.h> 10f42c2235SJoerg Roedel #include <linux/iommu.h> 11cd248341SJan Glauber #include <asm-generic/pci.h> 12a755a45dSJan Glauber #include <asm/pci_clp.h> 13d0b08853SJan Glauber #include <asm/pci_debug.h> 14bd3a1725SMartin Schwidefsky #include <asm/sclp.h> 15c6557e7fSMartin Schwidefsky 16cd248341SJan Glauber #define PCIBIOS_MIN_IO 0x1000 17cd248341SJan Glauber #define PCIBIOS_MIN_MEM 0x10000000 18cd248341SJan Glauber 19cd248341SJan Glauber #define pcibios_assign_all_busses() (0) 20cd248341SJan Glauber 21cd248341SJan Glauber void __iomem *pci_iomap(struct pci_dev *, int, unsigned long); 22cd248341SJan Glauber void pci_iounmap(struct pci_dev *, void __iomem *); 23cd248341SJan Glauber int pci_domain_nr(struct pci_bus *); 24cd248341SJan Glauber int pci_proc_domain(struct pci_bus *); 25cd248341SJan Glauber 26cd248341SJan Glauber #define ZPCI_BUS_NR 0 /* default bus number */ 27cd248341SJan Glauber #define ZPCI_DEVFN 0 /* default device number */ 28cd248341SJan Glauber 29c840927cSSebastian Ott #define ZPCI_NR_DMA_SPACES 1 30c840927cSSebastian Ott #define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS 31c840927cSSebastian Ott 32cd248341SJan Glauber /* PCI Function Controls */ 33cd248341SJan Glauber #define ZPCI_FC_FN_ENABLED 0x80 34cd248341SJan Glauber #define ZPCI_FC_ERROR 0x40 35cd248341SJan Glauber #define ZPCI_FC_BLOCKED 0x20 36cd248341SJan Glauber #define ZPCI_FC_DMA_ENABLED 0x10 37cd248341SJan Glauber 38f9dc447eSSebastian Ott #define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23) 39f9dc447eSSebastian Ott 40f9dc447eSSebastian Ott struct zpci_fmb_fmt0 { 41f9dc447eSSebastian Ott u64 dma_rbytes; 42f9dc447eSSebastian Ott u64 dma_wbytes; 43f9dc447eSSebastian Ott }; 44f9dc447eSSebastian Ott 45f9dc447eSSebastian Ott struct zpci_fmb_fmt1 { 46f9dc447eSSebastian Ott u64 rx_bytes; 47f9dc447eSSebastian Ott u64 rx_packets; 48f9dc447eSSebastian Ott u64 tx_bytes; 49f9dc447eSSebastian Ott u64 tx_packets; 50f9dc447eSSebastian Ott }; 51f9dc447eSSebastian Ott 52f9dc447eSSebastian Ott struct zpci_fmb_fmt2 { 53f9dc447eSSebastian Ott u64 consumed_work_units; 54f9dc447eSSebastian Ott u64 max_work_units; 55f9dc447eSSebastian Ott }; 56f9dc447eSSebastian Ott 570ac94282SSebastian Ott struct zpci_fmb_fmt3 { 580ac94282SSebastian Ott u64 tx_bytes; 590ac94282SSebastian Ott }; 600ac94282SSebastian Ott 61d0b08853SJan Glauber struct zpci_fmb { 62d0b08853SJan Glauber u32 format : 8; 63f9dc447eSSebastian Ott u32 fmt_ind : 24; 64d0b08853SJan Glauber u32 samples; 65d0b08853SJan Glauber u64 last_update; 66f9dc447eSSebastian Ott /* common counters */ 67d0b08853SJan Glauber u64 ld_ops; 68d0b08853SJan Glauber u64 st_ops; 69d0b08853SJan Glauber u64 stb_ops; 70d0b08853SJan Glauber u64 rpcit_ops; 71f9dc447eSSebastian Ott /* format specific counters */ 72f9dc447eSSebastian Ott union { 73f9dc447eSSebastian Ott struct zpci_fmb_fmt0 fmt0; 74f9dc447eSSebastian Ott struct zpci_fmb_fmt1 fmt1; 75f9dc447eSSebastian Ott struct zpci_fmb_fmt2 fmt2; 760ac94282SSebastian Ott struct zpci_fmb_fmt3 fmt3; 77f9dc447eSSebastian Ott }; 789d89d9e6SSebastian Ott } __packed __aligned(128); 79d0b08853SJan Glauber 80cd248341SJan Glauber enum zpci_state { 81783684f1SSebastian Ott ZPCI_FN_STATE_STANDBY = 0, 82783684f1SSebastian Ott ZPCI_FN_STATE_CONFIGURED = 1, 83783684f1SSebastian Ott ZPCI_FN_STATE_RESERVED = 2, 84783684f1SSebastian Ott ZPCI_FN_STATE_ONLINE = 3, 85cd248341SJan Glauber }; 86cd248341SJan Glauber 87cd248341SJan Glauber struct zpci_bar_struct { 887a572a3aSSebastian Ott struct resource *res; /* bus resource */ 8971ba41c9SSebastian Ott void __iomem *mio_wb; 9071ba41c9SSebastian Ott void __iomem *mio_wt; 91cd248341SJan Glauber u32 val; /* bar start & 3 flag bits */ 92cd248341SJan Glauber u16 map_idx; /* index into bar mapping array */ 937a572a3aSSebastian Ott u8 size; /* order 2 exponent */ 94cd248341SJan Glauber }; 95cd248341SJan Glauber 968128f23cSGerald Schaefer struct s390_domain; 978128f23cSGerald Schaefer 98cd248341SJan Glauber /* Private data per function */ 99cd248341SJan Glauber struct zpci_dev { 100cd248341SJan Glauber struct pci_bus *bus; 101cd248341SJan Glauber struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ 102cd248341SJan Glauber 103cd248341SJan Glauber enum zpci_state state; 104cd248341SJan Glauber u32 fid; /* function ID, used by sclp */ 105cd248341SJan Glauber u32 fh; /* function handle, used by insn's */ 106ac4995b9SSebastian Ott u16 vfn; /* virtual function number */ 107cd248341SJan Glauber u16 pchid; /* physical channel ID */ 108cd248341SJan Glauber u8 pfgid; /* function group ID */ 109ac4995b9SSebastian Ott u8 pft; /* pci function type */ 110cd248341SJan Glauber u16 domain; 111cd248341SJan Glauber 11280ed156aSSebastian Ott struct mutex lock; 113ac4995b9SSebastian Ott u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */ 114ac4995b9SSebastian Ott u32 uid; /* user defined id */ 115ac4995b9SSebastian Ott u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */ 116ac4995b9SSebastian Ott 1179a4da8a5SJan Glauber /* IRQ stuff */ 1189a4da8a5SJan Glauber u64 msi_addr; /* MSI address */ 119b19148f6SSebastian Ott unsigned int max_msi; /* maximum number of MSI's */ 120e979ce7bSSebastian Ott unsigned int msi_first_bit; 121e979ce7bSSebastian Ott unsigned int msi_nr_irqs; 1225d0d8f43SMartin Schwidefsky struct airq_iv *aibv; /* adapter interrupt bit vector */ 123795818e8SSebastian Ott unsigned long aisb; /* number of the summary bit */ 1249a4da8a5SJan Glauber 125828b35f6SJan Glauber /* DMA stuff */ 126828b35f6SJan Glauber unsigned long *dma_table; 127828b35f6SJan Glauber spinlock_t dma_table_lock; 128828b35f6SJan Glauber int tlb_refresh; 129828b35f6SJan Glauber 130828b35f6SJan Glauber spinlock_t iommu_bitmap_lock; 131828b35f6SJan Glauber unsigned long *iommu_bitmap; 13213954fd6SSebastian Ott unsigned long *lazy_bitmap; 133828b35f6SJan Glauber unsigned long iommu_size; 134828b35f6SJan Glauber unsigned long iommu_pages; 135828b35f6SJan Glauber unsigned int next_bit; 136828b35f6SJan Glauber 137f42c2235SJoerg Roedel struct iommu_device iommu_dev; /* IOMMU core handle */ 138f42c2235SJoerg Roedel 1397a572a3aSSebastian Ott char res_name[16]; 14071ba41c9SSebastian Ott bool mio_capable; 141cd248341SJan Glauber struct zpci_bar_struct bars[PCI_BAR_COUNT]; 142cd248341SJan Glauber 143828b35f6SJan Glauber u64 start_dma; /* Start of available DMA addresses */ 144828b35f6SJan Glauber u64 end_dma; /* End of available DMA addresses */ 145828b35f6SJan Glauber u64 dma_mask; /* DMA address space mask */ 146828b35f6SJan Glauber 147d0b08853SJan Glauber /* Function measurement block */ 148d0b08853SJan Glauber struct zpci_fmb *fmb; 149d0b08853SJan Glauber u16 fmb_update; /* update interval */ 1500b7589ecSSebastian Ott u16 fmb_length; 1516001018aSSebastian Ott /* software counters */ 1526001018aSSebastian Ott atomic64_t allocated_pages; 1536001018aSSebastian Ott atomic64_t mapped_pages; 1546001018aSSebastian Ott atomic64_t unmapped_pages; 155d0b08853SJan Glauber 156cd248341SJan Glauber enum pci_bus_speed max_bus_speed; 157d0b08853SJan Glauber 158d0b08853SJan Glauber struct dentry *debugfs_dev; 1598128f23cSGerald Schaefer 1608128f23cSGerald Schaefer struct s390_domain *s390_domain; /* s390 IOMMU domain data */ 161cd248341SJan Glauber }; 162cd248341SJan Glauber 163cd248341SJan Glauber static inline bool zdev_enabled(struct zpci_dev *zdev) 164cd248341SJan Glauber { 165cd248341SJan Glauber return (zdev->fh & (1UL << 31)) ? true : false; 166cd248341SJan Glauber } 167cd248341SJan Glauber 16893065d04SSebastian Ott extern const struct attribute_group *zpci_attr_groups[]; 169fbfe07d4SSebastian Ott extern unsigned int s390_pci_force_floating __initdata; 17093065d04SSebastian Ott 171cd248341SJan Glauber /* ----------------------------------------------------------------------------- 172cd248341SJan Glauber Prototypes 173cd248341SJan Glauber ----------------------------------------------------------------------------- */ 174cd248341SJan Glauber /* Base stuff */ 175cd248341SJan Glauber int zpci_create_device(struct zpci_dev *); 176623bd44dSSebastian Ott void zpci_remove_device(struct zpci_dev *zdev); 177cd248341SJan Glauber int zpci_enable_device(struct zpci_dev *); 178cb65a669SSebastian Ott int zpci_disable_device(struct zpci_dev *); 179828b35f6SJan Glauber int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 180828b35f6SJan Glauber int zpci_unregister_ioat(struct zpci_dev *, u8); 18101553d9aSSebastian Ott void zpci_remove_reserved_devices(void); 182cd248341SJan Glauber 183a755a45dSJan Glauber /* CLP */ 1841d578966SSebastian Ott int clp_scan_pci_devices(void); 1851d578966SSebastian Ott int clp_rescan_pci_devices(void); 18657b5918cSSebastian Ott int clp_rescan_pci_devices_simple(void); 187a755a45dSJan Glauber int clp_add_pci_device(u32, u32, int); 188a755a45dSJan Glauber int clp_enable_fh(struct zpci_dev *, u8); 189a755a45dSJan Glauber int clp_disable_fh(struct zpci_dev *); 190783684f1SSebastian Ott int clp_get_state(u32 fid, enum zpci_state *state); 191a755a45dSJan Glauber 192f42c2235SJoerg Roedel /* IOMMU Interface */ 193f42c2235SJoerg Roedel int zpci_init_iommu(struct zpci_dev *zdev); 194f42c2235SJoerg Roedel void zpci_destroy_iommu(struct zpci_dev *zdev); 195f42c2235SJoerg Roedel 1969a17e972SSebastian Ott #ifdef CONFIG_PCI 197c7ff0e91SSebastian Ott static inline bool zpci_use_mio(struct zpci_dev *zdev) 198c7ff0e91SSebastian Ott { 199c7ff0e91SSebastian Ott return static_branch_likely(&have_mio) && zdev->mio_capable; 200c7ff0e91SSebastian Ott } 201c7ff0e91SSebastian Ott 202cbc0dd1fSJan Glauber /* Error handling and recovery */ 203cbc0dd1fSJan Glauber void zpci_event_error(void *); 204cbc0dd1fSJan Glauber void zpci_event_availability(void *); 20557b5918cSSebastian Ott void zpci_rescan(void); 206aa3b7c29SSebastian Ott bool zpci_is_enabled(void); 2079a17e972SSebastian Ott #else /* CONFIG_PCI */ 2089a17e972SSebastian Ott static inline void zpci_event_error(void *e) {} 2099a17e972SSebastian Ott static inline void zpci_event_availability(void *e) {} 21057b5918cSSebastian Ott static inline void zpci_rescan(void) {} 2119a17e972SSebastian Ott #endif /* CONFIG_PCI */ 212cbc0dd1fSJan Glauber 21367f43f38SSebastian Ott #ifdef CONFIG_HOTPLUG_PCI_S390 21467f43f38SSebastian Ott int zpci_init_slot(struct zpci_dev *); 21567f43f38SSebastian Ott void zpci_exit_slot(struct zpci_dev *); 21667f43f38SSebastian Ott #else /* CONFIG_HOTPLUG_PCI_S390 */ 21767f43f38SSebastian Ott static inline int zpci_init_slot(struct zpci_dev *zdev) 21867f43f38SSebastian Ott { 21967f43f38SSebastian Ott return 0; 22067f43f38SSebastian Ott } 22167f43f38SSebastian Ott static inline void zpci_exit_slot(struct zpci_dev *zdev) {} 22267f43f38SSebastian Ott #endif /* CONFIG_HOTPLUG_PCI_S390 */ 22367f43f38SSebastian Ott 224cd248341SJan Glauber /* Helpers */ 225198a5278SSebastian Ott static inline struct zpci_dev *to_zpci(struct pci_dev *pdev) 226198a5278SSebastian Ott { 227198a5278SSebastian Ott return pdev->sysdata; 228198a5278SSebastian Ott } 229198a5278SSebastian Ott 230cd248341SJan Glauber struct zpci_dev *get_zdev_by_fid(u32); 231cd248341SJan Glauber 232828b35f6SJan Glauber /* DMA */ 233828b35f6SJan Glauber int zpci_dma_init(void); 234828b35f6SJan Glauber void zpci_dma_exit(void); 235828b35f6SJan Glauber 236c840927cSSebastian Ott int __init zpci_irq_init(void); 237c840927cSSebastian Ott void __init zpci_irq_exit(void); 238c840927cSSebastian Ott 239d0b08853SJan Glauber /* FMB */ 240d0b08853SJan Glauber int zpci_fmb_enable_device(struct zpci_dev *); 241d0b08853SJan Glauber int zpci_fmb_disable_device(struct zpci_dev *); 242d0b08853SJan Glauber 243d0b08853SJan Glauber /* Debug */ 244d0b08853SJan Glauber int zpci_debug_init(void); 245d0b08853SJan Glauber void zpci_debug_exit(void); 2469a99649fSSebastian Ott void zpci_debug_init_device(struct zpci_dev *, const char *); 247d0b08853SJan Glauber void zpci_debug_exit_device(struct zpci_dev *); 248d0b08853SJan Glauber void zpci_debug_info(struct zpci_dev *, struct seq_file *); 249d0b08853SJan Glauber 250bd3a1725SMartin Schwidefsky /* Error reporting */ 251bd3a1725SMartin Schwidefsky int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *); 252bd3a1725SMartin Schwidefsky 2533a368f74SPhilipp Hachtmann #ifdef CONFIG_NUMA 2543a368f74SPhilipp Hachtmann 2553a368f74SPhilipp Hachtmann /* Returns the node based on PCI bus */ 2563a368f74SPhilipp Hachtmann static inline int __pcibus_to_node(const struct pci_bus *bus) 2573a368f74SPhilipp Hachtmann { 2583a368f74SPhilipp Hachtmann return NUMA_NO_NODE; 2593a368f74SPhilipp Hachtmann } 2603a368f74SPhilipp Hachtmann 2613a368f74SPhilipp Hachtmann static inline const struct cpumask * 2623a368f74SPhilipp Hachtmann cpumask_of_pcibus(const struct pci_bus *bus) 2633a368f74SPhilipp Hachtmann { 2643a368f74SPhilipp Hachtmann return cpu_online_mask; 2653a368f74SPhilipp Hachtmann } 2663a368f74SPhilipp Hachtmann 2673a368f74SPhilipp Hachtmann #endif /* CONFIG_NUMA */ 2683a368f74SPhilipp Hachtmann 269cd248341SJan Glauber #endif 270