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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b19148f6e2
s390s arch_setup_msi_irqs function ensures that we don't return with more irqs than the PCI architecture allows and that a single PCI function doesn't consume more irqs than the kernel is configured for. At least the last check doesn't help much and should take the sum of all irqs into account. Since that's already done by irq_alloc_desc we can remove this check. As for the first check we should use the value provided by the firmware which can be less than what the PCI architecture allows. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
190 lines
5.0 KiB
C
190 lines
5.0 KiB
C
#ifndef __ASM_S390_PCI_H
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#define __ASM_S390_PCI_H
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/* must be set before including asm-generic/pci.h */
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#define PCI_DMA_BUS_IS_PHYS (0)
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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 <asm-generic/pci.h>
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#include <asm-generic/pci-dma-compat.h>
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#include <asm/pci_clp.h>
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#include <asm/pci_debug.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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struct zpci_fmb {
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u32 format : 8;
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u32 dma_valid : 1;
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u32 : 23;
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u32 samples;
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u64 last_update;
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/* hardware 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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u64 dma_rbytes;
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u64 dma_wbytes;
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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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} __packed __aligned(16);
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enum zpci_state {
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ZPCI_FN_STATE_RESERVED,
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ZPCI_FN_STATE_STANDBY,
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ZPCI_FN_STATE_CONFIGURED,
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ZPCI_FN_STATE_ONLINE,
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NR_ZPCI_FN_STATES,
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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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/* Private data per function */
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struct zpci_dev {
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struct pci_dev *pdev;
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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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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 int 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 iommu_size;
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unsigned long iommu_pages;
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unsigned int next_bit;
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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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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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};
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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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int zpci_enable_device(struct zpci_dev *);
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int zpci_disable_device(struct zpci_dev *);
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void zpci_stop_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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/* 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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#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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struct zpci_dev *get_zdev(struct pci_dev *);
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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 *);
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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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#endif
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