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325ef1857f
This was used by the ide, scsi and networking code in the past to determine if they should bounce payloads. Now that the dma mapping always have to support dma to all physical memory (thanks to swiotlb for non-iommu systems) there is no need to this crude hack any more. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Palmer Dabbelt <palmer@sifive.com> (for riscv) Reviewed-by: Jens Axboe <axboe@kernel.dk>
249 lines
6.2 KiB
C
249 lines
6.2 KiB
C
/* 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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/* must be set before including pci_clp.h */
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#define PCI_BAR_COUNT 6
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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 <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_DEVFN 0 /* default device number */
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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 {
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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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};
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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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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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/* Private data per function */
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struct zpci_dev {
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struct pci_bus *bus;
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struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */
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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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u16 domain;
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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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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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struct zpci_bar_struct bars[PCI_BAR_COUNT];
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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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enum pci_bus_speed max_bus_speed;
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struct dentry *debugfs_dev;
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struct dentry *debugfs_perf;
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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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/* -----------------------------------------------------------------------------
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Prototypes
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----------------------------------------------------------------------------- */
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/* Base stuff */
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int zpci_create_device(struct zpci_dev *);
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void zpci_remove_device(struct zpci_dev *zdev);
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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_scan_pci_devices(void);
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int clp_rescan_pci_devices(void);
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int clp_rescan_pci_devices_simple(void);
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int clp_add_pci_device(u32, u32, int);
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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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/* 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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/* 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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void zpci_rescan(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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static inline void zpci_rescan(void) {}
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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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return pdev->sysdata;
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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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/* 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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void zpci_debug_info(struct zpci_dev *, struct seq_file *);
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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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