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Diffstat (limited to 'arch/s390/include/asm/pci.h')
-rw-r--r--arch/s390/include/asm/pci.h318
1 files changed, 230 insertions, 88 deletions
diff --git a/arch/s390/include/asm/pci.h b/arch/s390/include/asm/pci.h
index 6e577ba0e5da..a32f465ecf73 100644
--- a/arch/s390/include/asm/pci.h
+++ b/arch/s390/include/asm/pci.h
@@ -1,15 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_S390_PCI_H
#define __ASM_S390_PCI_H
-/* must be set before including asm-generic/pci.h */
-#define PCI_DMA_BUS_IS_PHYS (0)
-/* must be set before including pci_clp.h */
-#define PCI_BAR_COUNT 6
-
-#include <asm-generic/pci.h>
-#include <asm-generic/pci-dma-compat.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 ARCH_GENERIC_PCI_MMAP_RESOURCE 1
+#define arch_can_pci_mmap_wc() 1
#define PCIBIOS_MIN_IO 0x1000
#define PCIBIOS_MIN_MEM 0x10000000
@@ -21,12 +24,17 @@ void pci_iounmap(struct pci_dev *, void __iomem *);
int pci_domain_nr(struct pci_bus *);
int pci_proc_domain(struct pci_bus *);
-/* MSI arch hooks */
-#define arch_setup_msi_irqs arch_setup_msi_irqs
-#define arch_teardown_msi_irqs arch_teardown_msi_irqs
-
#define ZPCI_BUS_NR 0 /* default bus number */
-#define ZPCI_DEVFN 0 /* default device 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
@@ -34,97 +42,155 @@ int pci_proc_domain(struct pci_bus *);
#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 dma_valid : 1;
- u32 : 23;
+ u32 format : 8;
+ u32 fmt_ind : 24;
u32 samples;
u64 last_update;
- /* hardware counters */
+ /* common counters */
u64 ld_ops;
u64 st_ops;
u64 stb_ops;
u64 rpcit_ops;
- u64 dma_rbytes;
- u64 dma_wbytes;
- /* software counters */
- atomic64_t allocated_pages;
- atomic64_t mapped_pages;
- atomic64_t unmapped_pages;
-} __packed __aligned(16);
-
-struct msi_map {
- unsigned long irq;
- struct msi_desc *msi;
- struct hlist_node msi_chain;
-};
-
-#define ZPCI_NR_MSI_VECS 64
-#define ZPCI_MSI_MASK (ZPCI_NR_MSI_VECS - 1)
+ /* 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_RESERVED,
- ZPCI_FN_STATE_STANDBY,
- ZPCI_FN_STATE_CONFIGURED,
- ZPCI_FN_STATE_ONLINE,
- NR_ZPCI_FN_STATES,
+ 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 */
- u8 size; /* order 2 exponent */
u16 map_idx; /* index into bar mapping array */
+ u8 size; /* order 2 exponent */
+};
+
+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 topo; /* TID if topo_is_tid, PCHID otherwise */
+ int domain_nr;
+ u8 multifunction : 1;
+ u8 topo_is_tid : 1;
+ enum pci_bus_speed max_bus_speed;
};
/* Private data per function */
struct zpci_dev {
- struct pci_dev *pdev;
- struct pci_bus *bus;
+ struct zpci_bus *zbus;
struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */
+ struct list_head iommu_list;
+ struct kref kref;
+ struct rcu_head rcu;
+ struct hotplug_slot hotplug_slot;
+ struct mutex state_lock; /* protect state changes */
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 */
+ u16 rid; /* RID as supplied by firmware */
+ u16 tid; /* Topology for which RID is valid */
u8 pfgid; /* function group ID */
- u16 domain;
+ u8 pft; /* pci function type */
+ u8 port;
+ u8 fidparm;
+ 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 tid_avail : 1;
+ u8 rtr_avail : 1; /* Relaxed translation allowed */
+ unsigned int devfn; /* DEVFN part of the RID*/
+
+ 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 */
- struct zdev_irq_map *irq_map;
- struct msi_map *msi_map[ZPCI_NR_MSI_VECS];
- unsigned int aisb; /* number of the summary bit */
+ 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 iommu_size;
- unsigned long iommu_pages;
- unsigned int next_bit;
+ struct iommu_device iommu_dev; /* IOMMU core handle */
- struct zpci_bar_struct bars[PCI_BAR_COUNT];
+ 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 mutex fmb_lock;
struct zpci_fmb *fmb;
u16 fmb_update; /* update interval */
+ u16 fmb_length;
+ u8 version;
enum pci_bus_speed max_bus_speed;
struct dentry *debugfs_dev;
- struct dentry *debugfs_perf;
-};
-struct pci_hp_callback_ops {
- int (*create_slot) (struct zpci_dev *zdev);
- void (*remove_slot) (struct zpci_dev *zdev);
+ /* IOMMU and passthrough */
+ struct iommu_domain *s390_domain; /* attached IOMMU domain */
+ struct kvm_zdev *kzdev;
+ struct mutex kzdev_lock;
+ spinlock_t dom_lock; /* protect s390_domain change */
};
static inline bool zdev_enabled(struct zpci_dev *zdev)
@@ -132,62 +198,118 @@ static inline bool zdev_enabled(struct zpci_dev *zdev)
return (zdev->fh & (1UL << 31)) ? true : false;
}
+extern const struct attribute_group zpci_attr_group;
+extern const struct attribute_group pfip_attr_group;
+extern const struct attribute_group zpci_ident_attr_group;
+
+#define ARCH_PCI_DEV_GROUPS &zpci_attr_group, \
+ &pfip_attr_group, \
+ &zpci_ident_attr_group,
+
+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_alloc_device(void);
-int zpci_create_device(struct zpci_dev *);
+struct zpci_dev *zpci_create_device(u32 fid, u32 fh, enum zpci_state state);
+int zpci_add_device(struct zpci_dev *zdev);
int zpci_enable_device(struct zpci_dev *);
+int zpci_reenable_device(struct zpci_dev *zdev);
int zpci_disable_device(struct zpci_dev *);
-void zpci_stop_device(struct zpci_dev *);
-void zpci_free_device(struct zpci_dev *);
-int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64);
+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_scan_devices(void);
+
+int zpci_hot_reset_device(struct zpci_dev *zdev);
+int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64, u8 *);
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_find_pci_devices(void);
-int clp_add_pci_device(u32, u32, int);
-int clp_enable_fh(struct zpci_dev *, u8);
-int clp_disable_fh(struct zpci_dev *);
-
-/* MSI */
-struct msi_desc *__irq_get_msi_desc(unsigned int);
-int zpci_msi_set_mask_bits(struct msi_desc *, u32, u32);
-int zpci_setup_msi_irq(struct zpci_dev *, struct msi_desc *, unsigned int, int);
-void zpci_teardown_msi_irq(struct zpci_dev *, struct msi_desc *);
-int zpci_msihash_init(void);
-void zpci_msihash_exit(void);
+int clp_setup_writeback_mio(void);
+int clp_scan_pci_devices(struct list_head *scan_list);
+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);
+
+/* Firmware Sysfs */
+int __init __zpci_fw_sysfs_init(void);
+
+static inline int __init zpci_fw_sysfs_init(void)
+{
+ if (IS_ENABLED(CONFIG_SYSFS))
+ return __zpci_fw_sysfs_init();
+ return 0;
+}
+
+/* IOMMU Interface */
+int zpci_init_iommu(struct zpci_dev *zdev);
+void zpci_destroy_iommu(struct zpci_dev *zdev);
+int zpci_iommu_register_ioat(struct zpci_dev *zdev, u8 *status);
#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 */
-struct zpci_dev *get_zdev(struct pci_dev *);
-struct zpci_dev *get_zdev_by_fid(u32);
-bool zpci_fid_present(u32);
+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));
+}
-/* sysfs */
-int zpci_sysfs_add_device(struct device *);
-void zpci_sysfs_remove_device(struct device *);
+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);
-/* Hotplug */
-extern struct mutex zpci_list_lock;
-extern struct list_head zpci_list;
-extern unsigned int s390_pci_probe;
-
-void zpci_register_hp_ops(struct pci_hp_callback_ops *);
-void zpci_deregister_hp_ops(void);
+/* IRQ */
+int __init zpci_irq_init(void);
+void __init zpci_irq_exit(void);
/* FMB */
int zpci_fmb_enable_device(struct zpci_dev *);
@@ -196,8 +318,28 @@ 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 *);
+void zpci_debug_init_device(struct zpci_dev *, const char *);
void zpci_debug_exit_device(struct zpci_dev *);
-void zpci_debug_info(struct zpci_dev *, struct seq_file *);
+
+/* 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
generated by cgit (git 2.34.1) at 2025-12-25 04:41:51 +0000