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304 lines
7.5 KiB
304 lines
7.5 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __ASM_S390_PCI_H |
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#define __ASM_S390_PCI_H |
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#include <linux/pci.h> |
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#include <linux/mutex.h> |
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#include <linux/iommu.h> |
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#include <linux/pci_hotplug.h> |
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#include <asm-generic/pci.h> |
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#include <asm/pci_clp.h> |
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#include <asm/pci_debug.h> |
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#include <asm/sclp.h> |
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#define PCIBIOS_MIN_IO 0x1000 |
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#define PCIBIOS_MIN_MEM 0x10000000 |
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#define pcibios_assign_all_busses() (0) |
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void __iomem *pci_iomap(struct pci_dev *, int, unsigned long); |
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void pci_iounmap(struct pci_dev *, void __iomem *); |
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int pci_domain_nr(struct pci_bus *); |
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int pci_proc_domain(struct pci_bus *); |
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#define ZPCI_BUS_NR 0 /* default bus number */ |
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#define ZPCI_NR_DMA_SPACES 1 |
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#define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS |
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#define ZPCI_DOMAIN_BITMAP_SIZE (1 << 16) |
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#ifdef PCI |
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#if (ZPCI_NR_DEVICES > ZPCI_DOMAIN_BITMAP_SIZE) |
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# error ZPCI_NR_DEVICES can not be bigger than ZPCI_DOMAIN_BITMAP_SIZE |
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#endif |
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#endif /* PCI */ |
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/* PCI Function Controls */ |
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#define ZPCI_FC_FN_ENABLED 0x80 |
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#define ZPCI_FC_ERROR 0x40 |
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#define ZPCI_FC_BLOCKED 0x20 |
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#define ZPCI_FC_DMA_ENABLED 0x10 |
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#define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23) |
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struct zpci_fmb_fmt0 { |
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u64 dma_rbytes; |
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u64 dma_wbytes; |
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}; |
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struct zpci_fmb_fmt1 { |
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u64 rx_bytes; |
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u64 rx_packets; |
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u64 tx_bytes; |
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u64 tx_packets; |
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}; |
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struct zpci_fmb_fmt2 { |
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u64 consumed_work_units; |
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u64 max_work_units; |
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}; |
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struct zpci_fmb_fmt3 { |
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u64 tx_bytes; |
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}; |
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struct zpci_fmb { |
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u32 format : 8; |
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u32 fmt_ind : 24; |
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u32 samples; |
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u64 last_update; |
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/* common counters */ |
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u64 ld_ops; |
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u64 st_ops; |
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u64 stb_ops; |
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u64 rpcit_ops; |
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/* format specific counters */ |
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union { |
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struct zpci_fmb_fmt0 fmt0; |
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struct zpci_fmb_fmt1 fmt1; |
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struct zpci_fmb_fmt2 fmt2; |
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struct zpci_fmb_fmt3 fmt3; |
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}; |
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} __packed __aligned(128); |
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enum zpci_state { |
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ZPCI_FN_STATE_STANDBY = 0, |
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ZPCI_FN_STATE_CONFIGURED = 1, |
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ZPCI_FN_STATE_RESERVED = 2, |
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ZPCI_FN_STATE_ONLINE = 3, |
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}; |
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struct zpci_bar_struct { |
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struct resource *res; /* bus resource */ |
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void __iomem *mio_wb; |
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void __iomem *mio_wt; |
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u32 val; /* bar start & 3 flag bits */ |
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u16 map_idx; /* index into bar mapping array */ |
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u8 size; /* order 2 exponent */ |
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}; |
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struct s390_domain; |
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#define ZPCI_FUNCTIONS_PER_BUS 256 |
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struct zpci_bus { |
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struct kref kref; |
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struct pci_bus *bus; |
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struct zpci_dev *function[ZPCI_FUNCTIONS_PER_BUS]; |
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struct list_head resources; |
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struct list_head bus_next; |
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struct resource bus_resource; |
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int pchid; |
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int domain_nr; |
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bool multifunction; |
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enum pci_bus_speed max_bus_speed; |
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}; |
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/* Private data per function */ |
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struct zpci_dev { |
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struct zpci_bus *zbus; |
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struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */ |
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struct list_head bus_next; |
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struct kref kref; |
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struct hotplug_slot hotplug_slot; |
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enum zpci_state state; |
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u32 fid; /* function ID, used by sclp */ |
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u32 fh; /* function handle, used by insn's */ |
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u16 vfn; /* virtual function number */ |
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u16 pchid; /* physical channel ID */ |
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u8 pfgid; /* function group ID */ |
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u8 pft; /* pci function type */ |
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u8 port; |
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u8 rid_available : 1; |
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u8 has_hp_slot : 1; |
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u8 is_physfn : 1; |
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u8 util_str_avail : 1; |
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u8 reserved : 4; |
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unsigned int devfn; /* DEVFN part of the RID*/ |
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struct mutex lock; |
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u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */ |
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u32 uid; /* user defined id */ |
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u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */ |
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/* IRQ stuff */ |
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u64 msi_addr; /* MSI address */ |
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unsigned int max_msi; /* maximum number of MSI's */ |
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unsigned int msi_first_bit; |
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unsigned int msi_nr_irqs; |
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struct airq_iv *aibv; /* adapter interrupt bit vector */ |
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unsigned long aisb; /* number of the summary bit */ |
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/* DMA stuff */ |
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unsigned long *dma_table; |
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spinlock_t dma_table_lock; |
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int tlb_refresh; |
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spinlock_t iommu_bitmap_lock; |
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unsigned long *iommu_bitmap; |
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unsigned long *lazy_bitmap; |
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unsigned long iommu_size; |
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unsigned long iommu_pages; |
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unsigned int next_bit; |
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struct iommu_device iommu_dev; /* IOMMU core handle */ |
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char res_name[16]; |
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bool mio_capable; |
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struct zpci_bar_struct bars[PCI_STD_NUM_BARS]; |
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u64 start_dma; /* Start of available DMA addresses */ |
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u64 end_dma; /* End of available DMA addresses */ |
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u64 dma_mask; /* DMA address space mask */ |
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/* Function measurement block */ |
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struct zpci_fmb *fmb; |
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u16 fmb_update; /* update interval */ |
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u16 fmb_length; |
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/* software counters */ |
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atomic64_t allocated_pages; |
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atomic64_t mapped_pages; |
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atomic64_t unmapped_pages; |
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u8 version; |
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enum pci_bus_speed max_bus_speed; |
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struct dentry *debugfs_dev; |
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struct s390_domain *s390_domain; /* s390 IOMMU domain data */ |
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}; |
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static inline bool zdev_enabled(struct zpci_dev *zdev) |
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{ |
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return (zdev->fh & (1UL << 31)) ? true : false; |
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} |
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extern const struct attribute_group *zpci_attr_groups[]; |
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extern unsigned int s390_pci_force_floating __initdata; |
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extern unsigned int s390_pci_no_rid; |
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/* ----------------------------------------------------------------------------- |
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Prototypes |
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----------------------------------------------------------------------------- */ |
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/* Base stuff */ |
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int zpci_create_device(u32 fid, u32 fh, enum zpci_state state); |
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void zpci_remove_device(struct zpci_dev *zdev, bool set_error); |
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int zpci_enable_device(struct zpci_dev *); |
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int zpci_disable_device(struct zpci_dev *); |
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int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64); |
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int zpci_unregister_ioat(struct zpci_dev *, u8); |
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void zpci_remove_reserved_devices(void); |
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/* CLP */ |
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int clp_setup_writeback_mio(void); |
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int clp_scan_pci_devices(void); |
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int clp_query_pci_fn(struct zpci_dev *zdev); |
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int clp_enable_fh(struct zpci_dev *, u8); |
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int clp_disable_fh(struct zpci_dev *); |
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int clp_get_state(u32 fid, enum zpci_state *state); |
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/* UID */ |
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void update_uid_checking(bool new); |
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/* IOMMU Interface */ |
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int zpci_init_iommu(struct zpci_dev *zdev); |
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void zpci_destroy_iommu(struct zpci_dev *zdev); |
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#ifdef CONFIG_PCI |
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static inline bool zpci_use_mio(struct zpci_dev *zdev) |
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{ |
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return static_branch_likely(&have_mio) && zdev->mio_capable; |
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} |
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/* Error handling and recovery */ |
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void zpci_event_error(void *); |
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void zpci_event_availability(void *); |
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bool zpci_is_enabled(void); |
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#else /* CONFIG_PCI */ |
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static inline void zpci_event_error(void *e) {} |
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static inline void zpci_event_availability(void *e) {} |
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#endif /* CONFIG_PCI */ |
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#ifdef CONFIG_HOTPLUG_PCI_S390 |
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int zpci_init_slot(struct zpci_dev *); |
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void zpci_exit_slot(struct zpci_dev *); |
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#else /* CONFIG_HOTPLUG_PCI_S390 */ |
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static inline int zpci_init_slot(struct zpci_dev *zdev) |
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{ |
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return 0; |
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} |
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static inline void zpci_exit_slot(struct zpci_dev *zdev) {} |
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#endif /* CONFIG_HOTPLUG_PCI_S390 */ |
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/* Helpers */ |
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static inline struct zpci_dev *to_zpci(struct pci_dev *pdev) |
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{ |
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struct zpci_bus *zbus = pdev->sysdata; |
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return zbus->function[pdev->devfn]; |
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} |
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static inline struct zpci_dev *to_zpci_dev(struct device *dev) |
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{ |
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return to_zpci(to_pci_dev(dev)); |
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} |
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struct zpci_dev *get_zdev_by_fid(u32); |
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/* DMA */ |
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int zpci_dma_init(void); |
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void zpci_dma_exit(void); |
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int __init zpci_irq_init(void); |
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void __init zpci_irq_exit(void); |
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/* FMB */ |
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int zpci_fmb_enable_device(struct zpci_dev *); |
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int zpci_fmb_disable_device(struct zpci_dev *); |
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/* Debug */ |
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int zpci_debug_init(void); |
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void zpci_debug_exit(void); |
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void zpci_debug_init_device(struct zpci_dev *, const char *); |
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void zpci_debug_exit_device(struct zpci_dev *); |
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/* Error reporting */ |
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int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *); |
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#ifdef CONFIG_NUMA |
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/* Returns the node based on PCI bus */ |
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static inline int __pcibus_to_node(const struct pci_bus *bus) |
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{ |
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return NUMA_NO_NODE; |
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} |
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static inline const struct cpumask * |
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cpumask_of_pcibus(const struct pci_bus *bus) |
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{ |
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return cpu_online_mask; |
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} |
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#endif /* CONFIG_NUMA */ |
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#endif
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