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 26c840927cSSebastian Ott #define ZPCI_NR_DMA_SPACES 1 27c840927cSSebastian Ott #define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS 28969ae01bSNiklas Schnelle #define ZPCI_DOMAIN_BITMAP_SIZE (1 << 16) 29c840927cSSebastian Ott 3005bc1be6SPierre Morel #ifdef PCI 3105bc1be6SPierre Morel #if (ZPCI_NR_DEVICES > ZPCI_DOMAIN_BITMAP_SIZE) 3205bc1be6SPierre Morel # error ZPCI_NR_DEVICES can not be bigger than ZPCI_DOMAIN_BITMAP_SIZE 3305bc1be6SPierre Morel #endif 3405bc1be6SPierre Morel #endif /* PCI */ 3505bc1be6SPierre Morel 36cd248341SJan Glauber /* PCI Function Controls */ 37cd248341SJan Glauber #define ZPCI_FC_FN_ENABLED 0x80 38cd248341SJan Glauber #define ZPCI_FC_ERROR 0x40 39cd248341SJan Glauber #define ZPCI_FC_BLOCKED 0x20 40cd248341SJan Glauber #define ZPCI_FC_DMA_ENABLED 0x10 41cd248341SJan Glauber 42f9dc447eSSebastian Ott #define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23) 43f9dc447eSSebastian Ott 44f9dc447eSSebastian Ott struct zpci_fmb_fmt0 { 45f9dc447eSSebastian Ott u64 dma_rbytes; 46f9dc447eSSebastian Ott u64 dma_wbytes; 47f9dc447eSSebastian Ott }; 48f9dc447eSSebastian Ott 49f9dc447eSSebastian Ott struct zpci_fmb_fmt1 { 50f9dc447eSSebastian Ott u64 rx_bytes; 51f9dc447eSSebastian Ott u64 rx_packets; 52f9dc447eSSebastian Ott u64 tx_bytes; 53f9dc447eSSebastian Ott u64 tx_packets; 54f9dc447eSSebastian Ott }; 55f9dc447eSSebastian Ott 56f9dc447eSSebastian Ott struct zpci_fmb_fmt2 { 57f9dc447eSSebastian Ott u64 consumed_work_units; 58f9dc447eSSebastian Ott u64 max_work_units; 59f9dc447eSSebastian Ott }; 60f9dc447eSSebastian Ott 610ac94282SSebastian Ott struct zpci_fmb_fmt3 { 620ac94282SSebastian Ott u64 tx_bytes; 630ac94282SSebastian Ott }; 640ac94282SSebastian Ott 65d0b08853SJan Glauber struct zpci_fmb { 66d0b08853SJan Glauber u32 format : 8; 67f9dc447eSSebastian Ott u32 fmt_ind : 24; 68d0b08853SJan Glauber u32 samples; 69d0b08853SJan Glauber u64 last_update; 70f9dc447eSSebastian Ott /* common counters */ 71d0b08853SJan Glauber u64 ld_ops; 72d0b08853SJan Glauber u64 st_ops; 73d0b08853SJan Glauber u64 stb_ops; 74d0b08853SJan Glauber u64 rpcit_ops; 75f9dc447eSSebastian Ott /* format specific counters */ 76f9dc447eSSebastian Ott union { 77f9dc447eSSebastian Ott struct zpci_fmb_fmt0 fmt0; 78f9dc447eSSebastian Ott struct zpci_fmb_fmt1 fmt1; 79f9dc447eSSebastian Ott struct zpci_fmb_fmt2 fmt2; 800ac94282SSebastian Ott struct zpci_fmb_fmt3 fmt3; 81f9dc447eSSebastian Ott }; 829d89d9e6SSebastian Ott } __packed __aligned(128); 83d0b08853SJan Glauber 84cd248341SJan Glauber enum zpci_state { 85783684f1SSebastian Ott ZPCI_FN_STATE_STANDBY = 0, 86783684f1SSebastian Ott ZPCI_FN_STATE_CONFIGURED = 1, 87783684f1SSebastian Ott ZPCI_FN_STATE_RESERVED = 2, 88cd248341SJan Glauber }; 89cd248341SJan Glauber 90cd248341SJan Glauber struct zpci_bar_struct { 917a572a3aSSebastian Ott struct resource *res; /* bus resource */ 9271ba41c9SSebastian Ott void __iomem *mio_wb; 9371ba41c9SSebastian Ott void __iomem *mio_wt; 94cd248341SJan Glauber u32 val; /* bar start & 3 flag bits */ 95cd248341SJan Glauber u16 map_idx; /* index into bar mapping array */ 967a572a3aSSebastian Ott u8 size; /* order 2 exponent */ 97cd248341SJan Glauber }; 98cd248341SJan Glauber 998128f23cSGerald Schaefer struct s390_domain; 1008128f23cSGerald Schaefer 10105bc1be6SPierre Morel #define ZPCI_FUNCTIONS_PER_BUS 256 10205bc1be6SPierre Morel struct zpci_bus { 10305bc1be6SPierre Morel struct kref kref; 10405bc1be6SPierre Morel struct pci_bus *bus; 10505bc1be6SPierre Morel struct zpci_dev *function[ZPCI_FUNCTIONS_PER_BUS]; 10605bc1be6SPierre Morel struct list_head resources; 10705bc1be6SPierre Morel struct list_head bus_next; 10865e450a9SPierre Morel struct resource bus_resource; 10905bc1be6SPierre Morel int pchid; 11005bc1be6SPierre Morel int domain_nr; 11144510d6fSPierre Morel bool multifunction; 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. */ 11944510d6fSPierre Morel struct list_head bus_next; 12005bc1be6SPierre Morel struct kref kref; 121035f212fSPierre Morel struct hotplug_slot hotplug_slot; 122cd248341SJan Glauber 123cd248341SJan Glauber enum zpci_state state; 124cd248341SJan Glauber u32 fid; /* function ID, used by sclp */ 125cd248341SJan Glauber u32 fh; /* function handle, used by insn's */ 126ac4995b9SSebastian Ott u16 vfn; /* virtual function number */ 127cd248341SJan Glauber u16 pchid; /* physical channel ID */ 128cd248341SJan Glauber u8 pfgid; /* function group ID */ 129ac4995b9SSebastian Ott u8 pft; /* pci function type */ 130e6ab7490SAlexander Schmidt u8 port; 131c9a1752bSPierre Morel u8 rid_available : 1; 13244510d6fSPierre Morel u8 has_hp_slot : 1; 133a50297cfSNiklas Schnelle u8 has_resources : 1; 134e5794cf1SNiklas Schnelle u8 is_physfn : 1; 135517fe298SMatthew Rosato u8 util_str_avail : 1; 136c1e18c17SNiklas Schnelle u8 irqs_registered : 1; 137c1e18c17SNiklas Schnelle u8 reserved : 2; 138c9a1752bSPierre Morel unsigned int devfn; /* DEVFN part of the RID*/ 139cd248341SJan Glauber 14080ed156aSSebastian Ott struct mutex lock; 141ac4995b9SSebastian Ott u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */ 142ac4995b9SSebastian Ott u32 uid; /* user defined id */ 143ac4995b9SSebastian Ott u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */ 144ac4995b9SSebastian Ott 1459a4da8a5SJan Glauber /* IRQ stuff */ 1469a4da8a5SJan Glauber u64 msi_addr; /* MSI address */ 147b19148f6SSebastian Ott unsigned int max_msi; /* maximum number of MSI's */ 148e979ce7bSSebastian Ott unsigned int msi_first_bit; 149e979ce7bSSebastian Ott unsigned int msi_nr_irqs; 1505d0d8f43SMartin Schwidefsky struct airq_iv *aibv; /* adapter interrupt bit vector */ 151795818e8SSebastian Ott unsigned long aisb; /* number of the summary bit */ 1529a4da8a5SJan Glauber 153828b35f6SJan Glauber /* DMA stuff */ 154828b35f6SJan Glauber unsigned long *dma_table; 155828b35f6SJan Glauber spinlock_t dma_table_lock; 156828b35f6SJan Glauber int tlb_refresh; 157828b35f6SJan Glauber 158828b35f6SJan Glauber spinlock_t iommu_bitmap_lock; 159828b35f6SJan Glauber unsigned long *iommu_bitmap; 16013954fd6SSebastian Ott unsigned long *lazy_bitmap; 161828b35f6SJan Glauber unsigned long iommu_size; 162828b35f6SJan Glauber unsigned long iommu_pages; 163828b35f6SJan Glauber unsigned int next_bit; 164828b35f6SJan Glauber 165f42c2235SJoerg Roedel struct iommu_device iommu_dev; /* IOMMU core handle */ 166f42c2235SJoerg Roedel 1677a572a3aSSebastian Ott char res_name[16]; 16871ba41c9SSebastian Ott bool mio_capable; 169c9c13ba4SDenis Efremov struct zpci_bar_struct bars[PCI_STD_NUM_BARS]; 170cd248341SJan Glauber 171828b35f6SJan Glauber u64 start_dma; /* Start of available DMA addresses */ 172828b35f6SJan Glauber u64 end_dma; /* End of available DMA addresses */ 173828b35f6SJan Glauber u64 dma_mask; /* DMA address space mask */ 174828b35f6SJan Glauber 175d0b08853SJan Glauber /* Function measurement block */ 176d0b08853SJan Glauber struct zpci_fmb *fmb; 177d0b08853SJan Glauber u16 fmb_update; /* update interval */ 1780b7589ecSSebastian Ott u16 fmb_length; 1796001018aSSebastian Ott /* software counters */ 1806001018aSSebastian Ott atomic64_t allocated_pages; 1816001018aSSebastian Ott atomic64_t mapped_pages; 1826001018aSSebastian Ott atomic64_t unmapped_pages; 183d0b08853SJan Glauber 184dc8c638dSMatthew Rosato u8 version; 185cd248341SJan Glauber enum pci_bus_speed max_bus_speed; 186d0b08853SJan Glauber 187d0b08853SJan Glauber struct dentry *debugfs_dev; 1888128f23cSGerald Schaefer 1898128f23cSGerald Schaefer struct s390_domain *s390_domain; /* s390 IOMMU domain data */ 190cd248341SJan Glauber }; 191cd248341SJan Glauber 192cd248341SJan Glauber static inline bool zdev_enabled(struct zpci_dev *zdev) 193cd248341SJan Glauber { 194cd248341SJan Glauber return (zdev->fh & (1UL << 31)) ? true : false; 195cd248341SJan Glauber } 196cd248341SJan Glauber 19793065d04SSebastian Ott extern const struct attribute_group *zpci_attr_groups[]; 198fbfe07d4SSebastian Ott extern unsigned int s390_pci_force_floating __initdata; 1996cf17f9aSPierre Morel extern unsigned int s390_pci_no_rid; 20093065d04SSebastian Ott 201cd248341SJan Glauber /* ----------------------------------------------------------------------------- 202cd248341SJan Glauber Prototypes 203cd248341SJan Glauber ----------------------------------------------------------------------------- */ 204cd248341SJan Glauber /* Base stuff */ 20514c87ba8SNiklas Schnelle struct zpci_dev *zpci_create_device(u32 fid, u32 fh, enum zpci_state state); 206cd248341SJan Glauber int zpci_enable_device(struct zpci_dev *); 207cb65a669SSebastian Ott int zpci_disable_device(struct zpci_dev *); 208a7f82c36SNiklas Schnelle int zpci_scan_configured_device(struct zpci_dev *zdev, u32 fh); 2092631f6b6SNiklas Schnelle int zpci_deconfigure_device(struct zpci_dev *zdev); 210a46044a9SNiklas Schnelle void zpci_device_reserved(struct zpci_dev *zdev); 211a46044a9SNiklas Schnelle bool zpci_is_device_configured(struct zpci_dev *zdev); 2122631f6b6SNiklas Schnelle 213828b35f6SJan Glauber int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); 214828b35f6SJan Glauber int zpci_unregister_ioat(struct zpci_dev *, u8); 21501553d9aSSebastian Ott void zpci_remove_reserved_devices(void); 216*4fe20497SNiklas Schnelle void zpci_update_fh(struct zpci_dev *zdev, u32 fh); 217cd248341SJan Glauber 218a755a45dSJan Glauber /* CLP */ 219b02002ccSNiklas Schnelle int clp_setup_writeback_mio(void); 2201d578966SSebastian Ott int clp_scan_pci_devices(void); 221ba764dd7SNiklas Schnelle int clp_query_pci_fn(struct zpci_dev *zdev); 222cc049eecSNiklas Schnelle int clp_enable_fh(struct zpci_dev *zdev, u32 *fh, u8 nr_dma_as); 223cc049eecSNiklas Schnelle int clp_disable_fh(struct zpci_dev *zdev, u32 *fh); 224783684f1SSebastian Ott int clp_get_state(u32 fid, enum zpci_state *state); 225cc049eecSNiklas Schnelle int clp_refresh_fh(u32 fid, u32 *fh); 226a755a45dSJan Glauber 2277a11c67aSNiklas Schnelle /* UID */ 2287a11c67aSNiklas Schnelle void update_uid_checking(bool new); 2297a11c67aSNiklas Schnelle 230f42c2235SJoerg Roedel /* IOMMU Interface */ 231f42c2235SJoerg Roedel int zpci_init_iommu(struct zpci_dev *zdev); 232f42c2235SJoerg Roedel void zpci_destroy_iommu(struct zpci_dev *zdev); 233f42c2235SJoerg Roedel 2349a17e972SSebastian Ott #ifdef CONFIG_PCI 235c7ff0e91SSebastian Ott static inline bool zpci_use_mio(struct zpci_dev *zdev) 236c7ff0e91SSebastian Ott { 237c7ff0e91SSebastian Ott return static_branch_likely(&have_mio) && zdev->mio_capable; 238c7ff0e91SSebastian Ott } 239c7ff0e91SSebastian Ott 240cbc0dd1fSJan Glauber /* Error handling and recovery */ 241cbc0dd1fSJan Glauber void zpci_event_error(void *); 242cbc0dd1fSJan Glauber void zpci_event_availability(void *); 243aa3b7c29SSebastian Ott bool zpci_is_enabled(void); 2449a17e972SSebastian Ott #else /* CONFIG_PCI */ 2459a17e972SSebastian Ott static inline void zpci_event_error(void *e) {} 2469a17e972SSebastian Ott static inline void zpci_event_availability(void *e) {} 2479a17e972SSebastian Ott #endif /* CONFIG_PCI */ 248cbc0dd1fSJan Glauber 24967f43f38SSebastian Ott #ifdef CONFIG_HOTPLUG_PCI_S390 25067f43f38SSebastian Ott int zpci_init_slot(struct zpci_dev *); 25167f43f38SSebastian Ott void zpci_exit_slot(struct zpci_dev *); 25267f43f38SSebastian Ott #else /* CONFIG_HOTPLUG_PCI_S390 */ 25367f43f38SSebastian Ott static inline int zpci_init_slot(struct zpci_dev *zdev) 25467f43f38SSebastian Ott { 25567f43f38SSebastian Ott return 0; 25667f43f38SSebastian Ott } 25767f43f38SSebastian Ott static inline void zpci_exit_slot(struct zpci_dev *zdev) {} 25867f43f38SSebastian Ott #endif /* CONFIG_HOTPLUG_PCI_S390 */ 25967f43f38SSebastian Ott 260cd248341SJan Glauber /* Helpers */ 261198a5278SSebastian Ott static inline struct zpci_dev *to_zpci(struct pci_dev *pdev) 262198a5278SSebastian Ott { 26305bc1be6SPierre Morel struct zpci_bus *zbus = pdev->sysdata; 26405bc1be6SPierre Morel 26544510d6fSPierre Morel return zbus->function[pdev->devfn]; 266198a5278SSebastian Ott } 267198a5278SSebastian Ott 268d08d6f5dSPierre Morel static inline struct zpci_dev *to_zpci_dev(struct device *dev) 269d08d6f5dSPierre Morel { 270d08d6f5dSPierre Morel return to_zpci(to_pci_dev(dev)); 271d08d6f5dSPierre Morel } 272d08d6f5dSPierre Morel 273cd248341SJan Glauber struct zpci_dev *get_zdev_by_fid(u32); 274cd248341SJan Glauber 275828b35f6SJan Glauber /* DMA */ 276828b35f6SJan Glauber int zpci_dma_init(void); 277828b35f6SJan Glauber void zpci_dma_exit(void); 2781f3f7681SNiklas Schnelle int zpci_dma_init_device(struct zpci_dev *zdev); 2791f3f7681SNiklas Schnelle int zpci_dma_exit_device(struct zpci_dev *zdev); 280828b35f6SJan Glauber 281c1e18c17SNiklas Schnelle /* IRQ */ 282c840927cSSebastian Ott int __init zpci_irq_init(void); 283c840927cSSebastian Ott void __init zpci_irq_exit(void); 284c840927cSSebastian Ott 285c1e18c17SNiklas Schnelle int zpci_set_irq(struct zpci_dev *zdev); 286c1e18c17SNiklas Schnelle int zpci_clear_irq(struct zpci_dev *zdev); 287c1e18c17SNiklas Schnelle 288d0b08853SJan Glauber /* FMB */ 289d0b08853SJan Glauber int zpci_fmb_enable_device(struct zpci_dev *); 290d0b08853SJan Glauber int zpci_fmb_disable_device(struct zpci_dev *); 291d0b08853SJan Glauber 292d0b08853SJan Glauber /* Debug */ 293d0b08853SJan Glauber int zpci_debug_init(void); 294d0b08853SJan Glauber void zpci_debug_exit(void); 2959a99649fSSebastian Ott void zpci_debug_init_device(struct zpci_dev *, const char *); 296d0b08853SJan Glauber void zpci_debug_exit_device(struct zpci_dev *); 297d0b08853SJan Glauber 298bd3a1725SMartin Schwidefsky /* Error reporting */ 299bd3a1725SMartin Schwidefsky int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *); 300bd3a1725SMartin Schwidefsky 3013a368f74SPhilipp Hachtmann #ifdef CONFIG_NUMA 3023a368f74SPhilipp Hachtmann 3033a368f74SPhilipp Hachtmann /* Returns the node based on PCI bus */ 3043a368f74SPhilipp Hachtmann static inline int __pcibus_to_node(const struct pci_bus *bus) 3053a368f74SPhilipp Hachtmann { 3063a368f74SPhilipp Hachtmann return NUMA_NO_NODE; 3073a368f74SPhilipp Hachtmann } 3083a368f74SPhilipp Hachtmann 3093a368f74SPhilipp Hachtmann static inline const struct cpumask * 3103a368f74SPhilipp Hachtmann cpumask_of_pcibus(const struct pci_bus *bus) 3113a368f74SPhilipp Hachtmann { 3123a368f74SPhilipp Hachtmann return cpu_online_mask; 3133a368f74SPhilipp Hachtmann } 3143a368f74SPhilipp Hachtmann 3153a368f74SPhilipp Hachtmann #endif /* CONFIG_NUMA */ 3163a368f74SPhilipp Hachtmann 317cd248341SJan Glauber #endif 318