| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Dave Jiang | 2675 | 89.67% | 75 | 90.36% |
| Tom Zanussi | 150 | 5.03% | 1 | 1.20% |
| Xiaochen Shen | 112 | 3.75% | 1 | 1.20% |
| Fenghua Yu | 26 | 0.87% | 1 | 1.20% |
| Thomas Gleixner | 9 | 0.30% | 3 | 3.61% |
| Gerard Snitselaar | 8 | 0.27% | 1 | 1.20% |
| Joerg Roedel | 3 | 0.10% | 1 | 1.20% |
| Total | 2983 | 83 |
/* SPDX-License-Identifier: GPL-2.0 */ /* Copyright(c) 2019 Intel Corporation. All rights rsvd. */ #ifndef _IDXD_H_ #define _IDXD_H_ #include <linux/sbitmap.h> #include <linux/dmaengine.h> #include <linux/percpu-rwsem.h> #include <linux/wait.h> #include <linux/cdev.h> #include <linux/idr.h> #include <linux/pci.h> #include <linux/bitmap.h> #include <linux/perf_event.h> #include <linux/iommu.h> #include <uapi/linux/idxd.h> #include "registers.h" #define IDXD_DRIVER_VERSION "1.00" extern struct kmem_cache *idxd_desc_pool; extern bool tc_override; struct idxd_wq; struct idxd_dev; enum idxd_dev_type { IDXD_DEV_NONE = -1, IDXD_DEV_DSA = 0, IDXD_DEV_IAX, IDXD_DEV_WQ, IDXD_DEV_GROUP, IDXD_DEV_ENGINE, IDXD_DEV_CDEV, IDXD_DEV_CDEV_FILE, IDXD_DEV_MAX_TYPE, }; struct idxd_dev { struct device conf_dev; enum idxd_dev_type type; }; #define IDXD_REG_TIMEOUT 50 #define IDXD_DRAIN_TIMEOUT 5000 enum idxd_type { IDXD_TYPE_UNKNOWN = -1, IDXD_TYPE_DSA = 0, IDXD_TYPE_IAX, IDXD_TYPE_MAX, }; #define IDXD_NAME_SIZE 128 #define IDXD_PMU_EVENT_MAX 64 #define IDXD_ENQCMDS_RETRIES 32 #define IDXD_ENQCMDS_MAX_RETRIES 64 struct idxd_device_driver { const char *name; enum idxd_dev_type *type; int (*probe)(struct idxd_dev *idxd_dev); void (*remove)(struct idxd_dev *idxd_dev); struct device_driver drv; }; extern struct idxd_device_driver dsa_drv; extern struct idxd_device_driver idxd_drv; extern struct idxd_device_driver idxd_dmaengine_drv; extern struct idxd_device_driver idxd_user_drv; #define INVALID_INT_HANDLE -1 struct idxd_irq_entry { int id; int vector; struct llist_head pending_llist; struct list_head work_list; /* * Lock to protect access between irq thread process descriptor * and irq thread processing error descriptor. */ spinlock_t list_lock; int int_handle; ioasid_t pasid; }; struct idxd_group { struct idxd_dev idxd_dev; struct idxd_device *idxd; struct grpcfg grpcfg; int id; int num_engines; int num_wqs; bool use_rdbuf_limit; u8 rdbufs_allowed; u8 rdbufs_reserved; int tc_a; int tc_b; int desc_progress_limit; int batch_progress_limit; }; struct idxd_pmu { struct idxd_device *idxd; struct perf_event *event_list[IDXD_PMU_EVENT_MAX]; int n_events; DECLARE_BITMAP(used_mask, IDXD_PMU_EVENT_MAX); struct pmu pmu; char name[IDXD_NAME_SIZE]; int cpu; int n_counters; int counter_width; int n_event_categories; bool per_counter_caps_supported; unsigned long supported_event_categories; unsigned long supported_filters; int n_filters; struct hlist_node cpuhp_node; }; #define IDXD_MAX_PRIORITY 0xf enum { COUNTER_FAULTS = 0, COUNTER_FAULT_FAILS, COUNTER_MAX }; enum idxd_wq_state { IDXD_WQ_DISABLED = 0, IDXD_WQ_ENABLED, }; enum idxd_wq_flag { WQ_FLAG_DEDICATED = 0, WQ_FLAG_BLOCK_ON_FAULT, WQ_FLAG_ATS_DISABLE, WQ_FLAG_PRS_DISABLE, }; enum idxd_wq_type { IDXD_WQT_NONE = 0, IDXD_WQT_KERNEL, IDXD_WQT_USER, }; struct idxd_cdev { struct idxd_wq *wq; struct cdev cdev; struct idxd_dev idxd_dev; int minor; }; #define IDXD_ALLOCATED_BATCH_SIZE 128U #define WQ_NAME_SIZE 1024 #define WQ_TYPE_SIZE 10 #define WQ_DEFAULT_QUEUE_DEPTH 16 #define WQ_DEFAULT_MAX_XFER SZ_2M #define WQ_DEFAULT_MAX_BATCH 32 enum idxd_op_type { IDXD_OP_BLOCK = 0, IDXD_OP_NONBLOCK = 1, }; enum idxd_complete_type { IDXD_COMPLETE_NORMAL = 0, IDXD_COMPLETE_ABORT, IDXD_COMPLETE_DEV_FAIL, }; struct idxd_dma_chan { struct dma_chan chan; struct idxd_wq *wq; }; struct idxd_wq { void __iomem *portal; u32 portal_offset; unsigned int enqcmds_retries; struct percpu_ref wq_active; struct completion wq_dead; struct completion wq_resurrect; struct idxd_dev idxd_dev; struct idxd_cdev *idxd_cdev; struct wait_queue_head err_queue; struct workqueue_struct *wq; struct idxd_device *idxd; int id; struct idxd_irq_entry ie; enum idxd_wq_type type; struct idxd_group *group; int client_count; struct mutex wq_lock; /* mutex for workqueue */ u32 size; u32 threshold; u32 priority; enum idxd_wq_state state; unsigned long flags; union wqcfg *wqcfg; unsigned long *opcap_bmap; struct dsa_hw_desc **hw_descs; int num_descs; union { struct dsa_completion_record *compls; struct iax_completion_record *iax_compls; }; dma_addr_t compls_addr; int compls_size; struct idxd_desc **descs; struct sbitmap_queue sbq; struct idxd_dma_chan *idxd_chan; char name[WQ_NAME_SIZE + 1]; u64 max_xfer_bytes; u32 max_batch_size; /* Lock to protect upasid_xa access. */ struct mutex uc_lock; struct xarray upasid_xa; }; struct idxd_engine { struct idxd_dev idxd_dev; int id; struct idxd_group *group; struct idxd_device *idxd; }; /* shadow registers */ struct idxd_hw { u32 version; union gen_cap_reg gen_cap; union wq_cap_reg wq_cap; union group_cap_reg group_cap; union engine_cap_reg engine_cap; struct opcap opcap; u32 cmd_cap; union iaa_cap_reg iaa_cap; }; enum idxd_device_state { IDXD_DEV_HALTED = -1, IDXD_DEV_DISABLED = 0, IDXD_DEV_ENABLED, }; enum idxd_device_flag { IDXD_FLAG_CONFIGURABLE = 0, IDXD_FLAG_CMD_RUNNING, IDXD_FLAG_PASID_ENABLED, IDXD_FLAG_USER_PASID_ENABLED, }; struct idxd_dma_dev { struct idxd_device *idxd; struct dma_device dma; }; struct idxd_driver_data { const char *name_prefix; enum idxd_type type; struct device_type *dev_type; int compl_size; int align; int evl_cr_off; int cr_status_off; int cr_result_off; }; struct idxd_evl { /* Lock to protect event log access. */ spinlock_t lock; void *log; dma_addr_t dma; /* Total size of event log = number of entries * entry size. */ unsigned int log_size; /* The number of entries in the event log. */ u16 size; u16 head; unsigned long *bmap; bool batch_fail[IDXD_MAX_BATCH_IDENT]; }; struct idxd_evl_fault { struct work_struct work; struct idxd_wq *wq; u8 status; /* make this last member always */ struct __evl_entry entry[]; }; struct idxd_device { struct idxd_dev idxd_dev; struct idxd_driver_data *data; struct list_head list; struct idxd_hw hw; enum idxd_device_state state; unsigned long flags; int id; int major; u32 cmd_status; struct idxd_irq_entry ie; /* misc irq, msix 0 */ struct pci_dev *pdev; void __iomem *reg_base; spinlock_t dev_lock; /* spinlock for device */ spinlock_t cmd_lock; /* spinlock for device commands */ struct completion *cmd_done; struct idxd_group **groups; struct idxd_wq **wqs; struct idxd_engine **engines; struct iommu_sva *sva; unsigned int pasid; int num_groups; int irq_cnt; bool request_int_handles; u32 msix_perm_offset; u32 wqcfg_offset; u32 grpcfg_offset; u32 perfmon_offset; u64 max_xfer_bytes; u32 max_batch_size; int max_groups; int max_engines; int max_rdbufs; int max_wqs; int max_wq_size; int rdbuf_limit; int nr_rdbufs; /* non-reserved read buffers */ unsigned int wqcfg_size; unsigned long *wq_enable_map; union sw_err_reg sw_err; wait_queue_head_t cmd_waitq; struct idxd_dma_dev *idxd_dma; struct workqueue_struct *wq; struct work_struct work; struct idxd_pmu *idxd_pmu; unsigned long *opcap_bmap; struct idxd_evl *evl; struct kmem_cache *evl_cache; struct dentry *dbgfs_dir; struct dentry *dbgfs_evl_file; }; static inline unsigned int evl_ent_size(struct idxd_device *idxd) { return idxd->hw.gen_cap.evl_support ? (32 * (1 << idxd->hw.gen_cap.evl_support)) : 0; } static inline unsigned int evl_size(struct idxd_device *idxd) { return idxd->evl->size * evl_ent_size(idxd); } /* IDXD software descriptor */ struct idxd_desc { union { struct dsa_hw_desc *hw; struct iax_hw_desc *iax_hw; }; dma_addr_t desc_dma; union { struct dsa_completion_record *completion; struct iax_completion_record *iax_completion; }; dma_addr_t compl_dma; struct dma_async_tx_descriptor txd; struct llist_node llnode; struct list_head list; int id; int cpu; struct idxd_wq *wq; }; /* * This is software defined error for the completion status. We overload the error code * that will never appear in completion status and only SWERR register. */ enum idxd_completion_status { IDXD_COMP_DESC_ABORT = 0xff, }; #define idxd_confdev(idxd) &idxd->idxd_dev.conf_dev #define wq_confdev(wq) &wq->idxd_dev.conf_dev #define engine_confdev(engine) &engine->idxd_dev.conf_dev #define group_confdev(group) &group->idxd_dev.conf_dev #define cdev_dev(cdev) &cdev->idxd_dev.conf_dev #define user_ctx_dev(ctx) (&(ctx)->idxd_dev.conf_dev) #define confdev_to_idxd_dev(dev) container_of(dev, struct idxd_dev, conf_dev) #define idxd_dev_to_idxd(idxd_dev) container_of(idxd_dev, struct idxd_device, idxd_dev) #define idxd_dev_to_wq(idxd_dev) container_of(idxd_dev, struct idxd_wq, idxd_dev) static inline struct idxd_device *confdev_to_idxd(struct device *dev) { struct idxd_dev *idxd_dev = confdev_to_idxd_dev(dev); return idxd_dev_to_idxd(idxd_dev); } static inline struct idxd_wq *confdev_to_wq(struct device *dev) { struct idxd_dev *idxd_dev = confdev_to_idxd_dev(dev); return idxd_dev_to_wq(idxd_dev); } static inline struct idxd_engine *confdev_to_engine(struct device *dev) { struct idxd_dev *idxd_dev = confdev_to_idxd_dev(dev); return container_of(idxd_dev, struct idxd_engine, idxd_dev); } static inline struct idxd_group *confdev_to_group(struct device *dev) { struct idxd_dev *idxd_dev = confdev_to_idxd_dev(dev); return container_of(idxd_dev, struct idxd_group, idxd_dev); } static inline struct idxd_cdev *dev_to_cdev(struct device *dev) { struct idxd_dev *idxd_dev = confdev_to_idxd_dev(dev); return container_of(idxd_dev, struct idxd_cdev, idxd_dev); } static inline void idxd_dev_set_type(struct idxd_dev *idev, int type) { if (type >= IDXD_DEV_MAX_TYPE) { idev->type = IDXD_DEV_NONE; return; } idev->type = type; } static inline struct idxd_irq_entry *idxd_get_ie(struct idxd_device *idxd, int idx) { return (idx == 0) ? &idxd->ie : &idxd->wqs[idx - 1]->ie; } static inline struct idxd_wq *ie_to_wq(struct idxd_irq_entry *ie) { return container_of(ie, struct idxd_wq, ie); } static inline struct idxd_device *ie_to_idxd(struct idxd_irq_entry *ie) { return container_of(ie, struct idxd_device, ie); } extern struct bus_type dsa_bus_type; extern bool support_enqcmd; extern struct ida idxd_ida; extern struct device_type dsa_device_type; extern struct device_type iax_device_type; extern struct device_type idxd_wq_device_type; extern struct device_type idxd_engine_device_type; extern struct device_type idxd_group_device_type; static inline bool is_dsa_dev(struct idxd_dev *idxd_dev) { return idxd_dev->type == IDXD_DEV_DSA; } static inline bool is_iax_dev(struct idxd_dev *idxd_dev) { return idxd_dev->type == IDXD_DEV_IAX; } static inline bool is_idxd_dev(struct idxd_dev *idxd_dev) { return is_dsa_dev(idxd_dev) || is_iax_dev(idxd_dev); } static inline bool is_idxd_wq_dev(struct idxd_dev *idxd_dev) { return idxd_dev->type == IDXD_DEV_WQ; } static inline bool is_idxd_wq_dmaengine(struct idxd_wq *wq) { if (wq->type == IDXD_WQT_KERNEL && strcmp(wq->name, "dmaengine") == 0) return true; return false; } static inline bool is_idxd_wq_user(struct idxd_wq *wq) { return wq->type == IDXD_WQT_USER; } static inline bool is_idxd_wq_kernel(struct idxd_wq *wq) { return wq->type == IDXD_WQT_KERNEL; } static inline bool wq_dedicated(struct idxd_wq *wq) { return test_bit(WQ_FLAG_DEDICATED, &wq->flags); } static inline bool wq_shared(struct idxd_wq *wq) { return !test_bit(WQ_FLAG_DEDICATED, &wq->flags); } static inline bool device_pasid_enabled(struct idxd_device *idxd) { return test_bit(IDXD_FLAG_PASID_ENABLED, &idxd->flags); } static inline bool device_user_pasid_enabled(struct idxd_device *idxd) { return test_bit(IDXD_FLAG_USER_PASID_ENABLED, &idxd->flags); } static inline bool wq_pasid_enabled(struct idxd_wq *wq) { return (is_idxd_wq_kernel(wq) && device_pasid_enabled(wq->idxd)) || (is_idxd_wq_user(wq) && device_user_pasid_enabled(wq->idxd)); } static inline bool wq_shared_supported(struct idxd_wq *wq) { return (support_enqcmd && wq_pasid_enabled(wq)); } enum idxd_portal_prot { IDXD_PORTAL_UNLIMITED = 0, IDXD_PORTAL_LIMITED, }; enum idxd_interrupt_type { IDXD_IRQ_MSIX = 0, IDXD_IRQ_IMS, }; static inline int idxd_get_wq_portal_offset(enum idxd_portal_prot prot) { return prot * 0x1000; } static inline int idxd_get_wq_portal_full_offset(int wq_id, enum idxd_portal_prot prot) { return ((wq_id * 4) << PAGE_SHIFT) + idxd_get_wq_portal_offset(prot); } #define IDXD_PORTAL_MASK (PAGE_SIZE - 1) /* * Even though this function can be accessed by multiple threads, it is safe to use. * At worst the address gets used more than once before it gets incremented. We don't * hit a threshold until iops becomes many million times a second. So the occasional * reuse of the same address is tolerable compare to using an atomic variable. This is * safe on a system that has atomic load/store for 32bit integers. Given that this is an * Intel iEP device, that should not be a problem. */ static inline void __iomem *idxd_wq_portal_addr(struct idxd_wq *wq) { int ofs = wq->portal_offset; wq->portal_offset = (ofs + sizeof(struct dsa_raw_desc)) & IDXD_PORTAL_MASK; return wq->portal + ofs; } static inline void idxd_wq_get(struct idxd_wq *wq) { wq->client_count++; } static inline void idxd_wq_put(struct idxd_wq *wq) { wq->client_count--; } static inline int idxd_wq_refcount(struct idxd_wq *wq) { return wq->client_count; }; /* * Intel IAA does not support batch processing. * The max batch size of device, max batch size of wq and * max batch shift of wqcfg should be always 0 on IAA. */ static inline void idxd_set_max_batch_size(int idxd_type, struct idxd_device *idxd, u32 max_batch_size) { if (idxd_type == IDXD_TYPE_IAX) idxd->max_batch_size = 0; else idxd->max_batch_size = max_batch_size; } static inline void idxd_wq_set_max_batch_size(int idxd_type, struct idxd_wq *wq, u32 max_batch_size) { if (idxd_type == IDXD_TYPE_IAX) wq->max_batch_size = 0; else wq->max_batch_size = max_batch_size; } static inline void idxd_wqcfg_set_max_batch_shift(int idxd_type, union wqcfg *wqcfg, u32 max_batch_shift) { if (idxd_type == IDXD_TYPE_IAX) wqcfg->max_batch_shift = 0; else wqcfg->max_batch_shift = max_batch_shift; } int __must_check __idxd_driver_register(struct idxd_device_driver *idxd_drv, struct module *module, const char *mod_name); #define idxd_driver_register(driver) \ __idxd_driver_register(driver, THIS_MODULE, KBUILD_MODNAME) void idxd_driver_unregister(struct idxd_device_driver *idxd_drv); #define module_idxd_driver(__idxd_driver) \ module_driver(__idxd_driver, idxd_driver_register, idxd_driver_unregister) int idxd_register_bus_type(void); void idxd_unregister_bus_type(void); int idxd_register_devices(struct idxd_device *idxd); void idxd_unregister_devices(struct idxd_device *idxd); int idxd_register_driver(void); void idxd_unregister_driver(void); void idxd_wqs_quiesce(struct idxd_device *idxd); bool idxd_queue_int_handle_resubmit(struct idxd_desc *desc); void multi_u64_to_bmap(unsigned long *bmap, u64 *val, int count); /* device interrupt control */ irqreturn_t idxd_misc_thread(int vec, void *data); irqreturn_t idxd_wq_thread(int irq, void *data); void idxd_mask_error_interrupts(struct idxd_device *idxd); void idxd_unmask_error_interrupts(struct idxd_device *idxd); /* device control */ int idxd_register_idxd_drv(void); void idxd_unregister_idxd_drv(void); int idxd_device_drv_probe(struct idxd_dev *idxd_dev); void idxd_device_drv_remove(struct idxd_dev *idxd_dev); int drv_enable_wq(struct idxd_wq *wq); void drv_disable_wq(struct idxd_wq *wq); int idxd_device_init_reset(struct idxd_device *idxd); int idxd_device_enable(struct idxd_device *idxd); int idxd_device_disable(struct idxd_device *idxd); void idxd_device_reset(struct idxd_device *idxd); void idxd_device_clear_state(struct idxd_device *idxd); int idxd_device_config(struct idxd_device *idxd); void idxd_device_drain_pasid(struct idxd_device *idxd, int pasid); int idxd_device_load_config(struct idxd_device *idxd); int idxd_device_request_int_handle(struct idxd_device *idxd, int idx, int *handle, enum idxd_interrupt_type irq_type); int idxd_device_release_int_handle(struct idxd_device *idxd, int handle, enum idxd_interrupt_type irq_type); /* work queue control */ void idxd_wqs_unmap_portal(struct idxd_device *idxd); int idxd_wq_alloc_resources(struct idxd_wq *wq); void idxd_wq_free_resources(struct idxd_wq *wq); int idxd_wq_enable(struct idxd_wq *wq); int idxd_wq_disable(struct idxd_wq *wq, bool reset_config); void idxd_wq_drain(struct idxd_wq *wq); void idxd_wq_reset(struct idxd_wq *wq); int idxd_wq_map_portal(struct idxd_wq *wq); void idxd_wq_unmap_portal(struct idxd_wq *wq); int idxd_wq_set_pasid(struct idxd_wq *wq, int pasid); int idxd_wq_disable_pasid(struct idxd_wq *wq); void __idxd_wq_quiesce(struct idxd_wq *wq); void idxd_wq_quiesce(struct idxd_wq *wq); int idxd_wq_init_percpu_ref(struct idxd_wq *wq); void idxd_wq_free_irq(struct idxd_wq *wq); int idxd_wq_request_irq(struct idxd_wq *wq); /* submission */ int idxd_submit_desc(struct idxd_wq *wq, struct idxd_desc *desc); struct idxd_desc *idxd_alloc_desc(struct idxd_wq *wq, enum idxd_op_type optype); void idxd_free_desc(struct idxd_wq *wq, struct idxd_desc *desc); int idxd_enqcmds(struct idxd_wq *wq, void __iomem *portal, const void *desc); /* dmaengine */ int idxd_register_dma_device(struct idxd_device *idxd); void idxd_unregister_dma_device(struct idxd_device *idxd); void idxd_parse_completion_status(u8 status, enum dmaengine_tx_result *res); void idxd_dma_complete_txd(struct idxd_desc *desc, enum idxd_complete_type comp_type, bool free_desc); /* cdev */ int idxd_cdev_register(void); void idxd_cdev_remove(void); int idxd_cdev_get_major(struct idxd_device *idxd); int idxd_wq_add_cdev(struct idxd_wq *wq); void idxd_wq_del_cdev(struct idxd_wq *wq); int idxd_copy_cr(struct idxd_wq *wq, ioasid_t pasid, unsigned long addr, void *buf, int len); void idxd_user_counter_increment(struct idxd_wq *wq, u32 pasid, int index); /* perfmon */ #if IS_ENABLED(CONFIG_INTEL_IDXD_PERFMON) int perfmon_pmu_init(struct idxd_device *idxd); void perfmon_pmu_remove(struct idxd_device *idxd); void perfmon_counter_overflow(struct idxd_device *idxd); void perfmon_init(void); void perfmon_exit(void); #else static inline int perfmon_pmu_init(struct idxd_device *idxd) { return 0; } static inline void perfmon_pmu_remove(struct idxd_device *idxd) {} static inline void perfmon_counter_overflow(struct idxd_device *idxd) {} static inline void perfmon_init(void) {} static inline void perfmon_exit(void) {} #endif /* debugfs */ int idxd_device_init_debugfs(struct idxd_device *idxd); void idxd_device_remove_debugfs(struct idxd_device *idxd); int idxd_init_debugfs(void); void idxd_remove_debugfs(void); #endif
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