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-rw-r--r--arch/s390/include/asm/pci.h326
1 files changed, 326 insertions, 0 deletions
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
new file mode 100644
index 000000000..108e732d7
--- /dev/null
+++ b/arch/s390/include/asm/pci.h
@@ -0,0 +1,326 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_S390_PCI_H
+#define __ASM_S390_PCI_H
+
+#include <linux/pci.h>
+#include <linux/mutex.h>
+#include <linux/iommu.h>
+#include <linux/pci_hotplug.h>
+#include <asm/pci_clp.h>
+#include <asm/pci_debug.h>
+#include <asm/pci_insn.h>
+#include <asm/sclp.h>
+
+#define PCIBIOS_MIN_IO 0x1000
+#define PCIBIOS_MIN_MEM 0x10000000
+
+#define pcibios_assign_all_busses() (0)
+
+void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
+void pci_iounmap(struct pci_dev *, void __iomem *);
+int pci_domain_nr(struct pci_bus *);
+int pci_proc_domain(struct pci_bus *);
+
+#define ZPCI_BUS_NR 0 /* default bus number */
+
+#define ZPCI_NR_DMA_SPACES 1
+#define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS
+#define ZPCI_DOMAIN_BITMAP_SIZE (1 << 16)
+
+#ifdef PCI
+#if (ZPCI_NR_DEVICES > ZPCI_DOMAIN_BITMAP_SIZE)
+# error ZPCI_NR_DEVICES can not be bigger than ZPCI_DOMAIN_BITMAP_SIZE
+#endif
+#endif /* PCI */
+
+/* PCI Function Controls */
+#define ZPCI_FC_FN_ENABLED 0x80
+#define ZPCI_FC_ERROR 0x40
+#define ZPCI_FC_BLOCKED 0x20
+#define ZPCI_FC_DMA_ENABLED 0x10
+
+#define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23)
+
+struct zpci_fmb_fmt0 {
+ u64 dma_rbytes;
+ u64 dma_wbytes;
+};
+
+struct zpci_fmb_fmt1 {
+ u64 rx_bytes;
+ u64 rx_packets;
+ u64 tx_bytes;
+ u64 tx_packets;
+};
+
+struct zpci_fmb_fmt2 {
+ u64 consumed_work_units;
+ u64 max_work_units;
+};
+
+struct zpci_fmb_fmt3 {
+ u64 tx_bytes;
+};
+
+struct zpci_fmb {
+ u32 format : 8;
+ u32 fmt_ind : 24;
+ u32 samples;
+ u64 last_update;
+ /* common counters */
+ u64 ld_ops;
+ u64 st_ops;
+ u64 stb_ops;
+ u64 rpcit_ops;
+ /* format specific counters */
+ union {
+ struct zpci_fmb_fmt0 fmt0;
+ struct zpci_fmb_fmt1 fmt1;
+ struct zpci_fmb_fmt2 fmt2;
+ struct zpci_fmb_fmt3 fmt3;
+ };
+} __packed __aligned(128);
+
+enum zpci_state {
+ ZPCI_FN_STATE_STANDBY = 0,
+ ZPCI_FN_STATE_CONFIGURED = 1,
+ ZPCI_FN_STATE_RESERVED = 2,
+};
+
+struct zpci_bar_struct {
+ struct resource *res; /* bus resource */
+ void __iomem *mio_wb;
+ void __iomem *mio_wt;
+ u32 val; /* bar start & 3 flag bits */
+ u16 map_idx; /* index into bar mapping array */
+ u8 size; /* order 2 exponent */
+};
+
+struct s390_domain;
+struct kvm_zdev;
+
+#define ZPCI_FUNCTIONS_PER_BUS 256
+struct zpci_bus {
+ struct kref kref;
+ struct pci_bus *bus;
+ struct zpci_dev *function[ZPCI_FUNCTIONS_PER_BUS];
+ struct list_head resources;
+ struct list_head bus_next;
+ struct resource bus_resource;
+ int pchid;
+ int domain_nr;
+ bool multifunction;
+ enum pci_bus_speed max_bus_speed;
+};
+
+/* Private data per function */
+struct zpci_dev {
+ struct zpci_bus *zbus;
+ struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */
+ struct kref kref;
+ struct hotplug_slot hotplug_slot;
+
+ enum zpci_state state;
+ u32 fid; /* function ID, used by sclp */
+ u32 fh; /* function handle, used by insn's */
+ u32 gisa; /* GISA designation for passthrough */
+ u16 vfn; /* virtual function number */
+ u16 pchid; /* physical channel ID */
+ u16 maxstbl; /* Maximum store block size */
+ u8 pfgid; /* function group ID */
+ u8 pft; /* pci function type */
+ u8 port;
+ u8 dtsm; /* Supported DT mask */
+ u8 rid_available : 1;
+ u8 has_hp_slot : 1;
+ u8 has_resources : 1;
+ u8 is_physfn : 1;
+ u8 util_str_avail : 1;
+ u8 irqs_registered : 1;
+ u8 reserved : 2;
+ unsigned int devfn; /* DEVFN part of the RID*/
+
+ struct mutex lock;
+ u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */
+ u32 uid; /* user defined id */
+ u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */
+
+ /* IRQ stuff */
+ u64 msi_addr; /* MSI address */
+ unsigned int max_msi; /* maximum number of MSI's */
+ unsigned int msi_first_bit;
+ unsigned int msi_nr_irqs;
+ struct airq_iv *aibv; /* adapter interrupt bit vector */
+ unsigned long aisb; /* number of the summary bit */
+
+ /* DMA stuff */
+ unsigned long *dma_table;
+ spinlock_t dma_table_lock;
+ int tlb_refresh;
+
+ spinlock_t iommu_bitmap_lock;
+ unsigned long *iommu_bitmap;
+ unsigned long *lazy_bitmap;
+ unsigned long iommu_size;
+ unsigned long iommu_pages;
+ unsigned int next_bit;
+
+ struct iommu_device iommu_dev; /* IOMMU core handle */
+
+ char res_name[16];
+ bool mio_capable;
+ struct zpci_bar_struct bars[PCI_STD_NUM_BARS];
+
+ u64 start_dma; /* Start of available DMA addresses */
+ u64 end_dma; /* End of available DMA addresses */
+ u64 dma_mask; /* DMA address space mask */
+
+ /* Function measurement block */
+ struct zpci_fmb *fmb;
+ u16 fmb_update; /* update interval */
+ u16 fmb_length;
+ /* software counters */
+ atomic64_t allocated_pages;
+ atomic64_t mapped_pages;
+ atomic64_t unmapped_pages;
+
+ u8 version;
+ enum pci_bus_speed max_bus_speed;
+
+ struct dentry *debugfs_dev;
+
+ /* IOMMU and passthrough */
+ struct s390_domain *s390_domain; /* s390 IOMMU domain data */
+ struct kvm_zdev *kzdev;
+ struct mutex kzdev_lock;
+};
+
+static inline bool zdev_enabled(struct zpci_dev *zdev)
+{
+ return (zdev->fh & (1UL << 31)) ? true : false;
+}
+
+extern const struct attribute_group *zpci_attr_groups[];
+extern unsigned int s390_pci_force_floating __initdata;
+extern unsigned int s390_pci_no_rid;
+
+extern union zpci_sic_iib *zpci_aipb;
+extern struct airq_iv *zpci_aif_sbv;
+
+/* -----------------------------------------------------------------------------
+ Prototypes
+----------------------------------------------------------------------------- */
+/* Base stuff */
+struct zpci_dev *zpci_create_device(u32 fid, u32 fh, enum zpci_state state);
+int zpci_enable_device(struct zpci_dev *);
+int zpci_disable_device(struct zpci_dev *);
+int zpci_scan_configured_device(struct zpci_dev *zdev, u32 fh);
+int zpci_deconfigure_device(struct zpci_dev *zdev);
+void zpci_device_reserved(struct zpci_dev *zdev);
+bool zpci_is_device_configured(struct zpci_dev *zdev);
+
+int zpci_hot_reset_device(struct zpci_dev *zdev);
+int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
+int zpci_unregister_ioat(struct zpci_dev *, u8);
+void zpci_remove_reserved_devices(void);
+void zpci_update_fh(struct zpci_dev *zdev, u32 fh);
+
+/* CLP */
+int clp_setup_writeback_mio(void);
+int clp_scan_pci_devices(void);
+int clp_query_pci_fn(struct zpci_dev *zdev);
+int clp_enable_fh(struct zpci_dev *zdev, u32 *fh, u8 nr_dma_as);
+int clp_disable_fh(struct zpci_dev *zdev, u32 *fh);
+int clp_get_state(u32 fid, enum zpci_state *state);
+int clp_refresh_fh(u32 fid, u32 *fh);
+
+/* UID */
+void update_uid_checking(bool new);
+
+/* IOMMU Interface */
+int zpci_init_iommu(struct zpci_dev *zdev);
+void zpci_destroy_iommu(struct zpci_dev *zdev);
+
+#ifdef CONFIG_PCI
+static inline bool zpci_use_mio(struct zpci_dev *zdev)
+{
+ return static_branch_likely(&have_mio) && zdev->mio_capable;
+}
+
+/* Error handling and recovery */
+void zpci_event_error(void *);
+void zpci_event_availability(void *);
+bool zpci_is_enabled(void);
+#else /* CONFIG_PCI */
+static inline void zpci_event_error(void *e) {}
+static inline void zpci_event_availability(void *e) {}
+#endif /* CONFIG_PCI */
+
+#ifdef CONFIG_HOTPLUG_PCI_S390
+int zpci_init_slot(struct zpci_dev *);
+void zpci_exit_slot(struct zpci_dev *);
+#else /* CONFIG_HOTPLUG_PCI_S390 */
+static inline int zpci_init_slot(struct zpci_dev *zdev)
+{
+ return 0;
+}
+static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
+#endif /* CONFIG_HOTPLUG_PCI_S390 */
+
+/* Helpers */
+static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
+{
+ struct zpci_bus *zbus = pdev->sysdata;
+
+ return zbus->function[pdev->devfn];
+}
+
+static inline struct zpci_dev *to_zpci_dev(struct device *dev)
+{
+ return to_zpci(to_pci_dev(dev));
+}
+
+struct zpci_dev *get_zdev_by_fid(u32);
+
+/* DMA */
+int zpci_dma_init(void);
+void zpci_dma_exit(void);
+int zpci_dma_init_device(struct zpci_dev *zdev);
+int zpci_dma_exit_device(struct zpci_dev *zdev);
+
+/* IRQ */
+int __init zpci_irq_init(void);
+void __init zpci_irq_exit(void);
+
+/* FMB */
+int zpci_fmb_enable_device(struct zpci_dev *);
+int zpci_fmb_disable_device(struct zpci_dev *);
+
+/* Debug */
+int zpci_debug_init(void);
+void zpci_debug_exit(void);
+void zpci_debug_init_device(struct zpci_dev *, const char *);
+void zpci_debug_exit_device(struct zpci_dev *);
+
+/* Error handling */
+int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *);
+int zpci_clear_error_state(struct zpci_dev *zdev);
+int zpci_reset_load_store_blocked(struct zpci_dev *zdev);
+
+#ifdef CONFIG_NUMA
+
+/* Returns the node based on PCI bus */
+static inline int __pcibus_to_node(const struct pci_bus *bus)
+{
+ return NUMA_NO_NODE;
+}
+
+static inline const struct cpumask *
+cpumask_of_pcibus(const struct pci_bus *bus)
+{
+ return cpu_online_mask;
+}
+
+#endif /* CONFIG_NUMA */
+
+#endif