| // SPDX-License-Identifier: GPL-2.0+ |
| // Copyright 2017 IBM Corp. |
| #ifndef _OCXL_INTERNAL_H_ |
| #define _OCXL_INTERNAL_H_ |
| |
| #include <linux/pci.h> |
| #include <linux/cdev.h> |
| #include <linux/list.h> |
| #include <misc/ocxl.h> |
| |
| #define MAX_IRQ_PER_LINK 2000 |
| #define MAX_IRQ_PER_CONTEXT MAX_IRQ_PER_LINK |
| |
| extern struct pci_driver ocxl_pci_driver; |
| |
| struct ocxl_fn { |
| struct device dev; |
| int bar_used[3]; |
| struct ocxl_fn_config config; |
| struct list_head afu_list; |
| int pasid_base; |
| int actag_base; |
| int actag_enabled; |
| int actag_supported; |
| struct list_head pasid_list; |
| struct list_head actag_list; |
| void *link; |
| }; |
| |
| struct ocxl_file_info { |
| struct ocxl_afu *afu; |
| struct device dev; |
| struct cdev cdev; |
| struct bin_attribute attr_global_mmio; |
| }; |
| |
| struct ocxl_afu { |
| struct kref kref; |
| struct ocxl_fn *fn; |
| struct list_head list; |
| struct ocxl_afu_config config; |
| int pasid_base; |
| int pasid_count; /* opened contexts */ |
| int pasid_max; /* maximum number of contexts */ |
| int actag_base; |
| int actag_enabled; |
| struct mutex contexts_lock; |
| struct idr contexts_idr; |
| struct mutex afu_control_lock; |
| u64 global_mmio_start; |
| u64 irq_base_offset; |
| void __iomem *global_mmio_ptr; |
| u64 pp_mmio_start; |
| void *private; |
| }; |
| |
| enum ocxl_context_status { |
| CLOSED, |
| OPENED, |
| ATTACHED, |
| }; |
| |
| // Contains metadata about a translation fault |
| struct ocxl_xsl_error { |
| u64 addr; // The address that triggered the fault |
| u64 dsisr; // the value of the dsisr register |
| u64 count; // The number of times this fault has been triggered |
| }; |
| |
| struct ocxl_context { |
| struct ocxl_afu *afu; |
| int pasid; |
| struct mutex status_mutex; |
| enum ocxl_context_status status; |
| struct address_space *mapping; |
| struct mutex mapping_lock; |
| wait_queue_head_t events_wq; |
| struct mutex xsl_error_lock; |
| struct ocxl_xsl_error xsl_error; |
| struct mutex irq_lock; |
| struct idr irq_idr; |
| u16 tidr; // Thread ID used for P9 wait implementation |
| }; |
| |
| struct ocxl_process_element { |
| __be64 config_state; |
| __be32 reserved1[11]; |
| __be32 lpid; |
| __be32 tid; |
| __be32 pid; |
| __be32 reserved2[10]; |
| __be64 amr; |
| __be32 reserved3[3]; |
| __be32 software_state; |
| }; |
| |
| int ocxl_create_cdev(struct ocxl_afu *afu); |
| void ocxl_destroy_cdev(struct ocxl_afu *afu); |
| int ocxl_file_register_afu(struct ocxl_afu *afu); |
| void ocxl_file_unregister_afu(struct ocxl_afu *afu); |
| |
| int ocxl_file_init(void); |
| void ocxl_file_exit(void); |
| |
| int ocxl_pasid_afu_alloc(struct ocxl_fn *fn, u32 size); |
| void ocxl_pasid_afu_free(struct ocxl_fn *fn, u32 start, u32 size); |
| int ocxl_actag_afu_alloc(struct ocxl_fn *fn, u32 size); |
| void ocxl_actag_afu_free(struct ocxl_fn *fn, u32 start, u32 size); |
| |
| /* |
| * Get the max PASID value that can be used by the function |
| */ |
| int ocxl_config_get_pasid_info(struct pci_dev *dev, int *count); |
| |
| /* |
| * Check if an AFU index is valid for the given function. |
| * |
| * AFU indexes can be sparse, so a driver should check all indexes up |
| * to the maximum found in the function description |
| */ |
| int ocxl_config_check_afu_index(struct pci_dev *dev, |
| struct ocxl_fn_config *fn, int afu_idx); |
| |
| /** |
| * Update values within a Process Element |
| * |
| * link_handle: the link handle associated with the process element |
| * pasid: the PASID for the AFU context |
| * tid: the new thread id for the process element |
| */ |
| int ocxl_link_update_pe(void *link_handle, int pasid, __u16 tid); |
| |
| int ocxl_context_mmap(struct ocxl_context *ctx, |
| struct vm_area_struct *vma); |
| void ocxl_context_detach_all(struct ocxl_afu *afu); |
| |
| int ocxl_sysfs_register_afu(struct ocxl_file_info *info); |
| void ocxl_sysfs_unregister_afu(struct ocxl_file_info *info); |
| |
| int ocxl_irq_offset_to_id(struct ocxl_context *ctx, u64 offset); |
| u64 ocxl_irq_id_to_offset(struct ocxl_context *ctx, int irq_id); |
| void ocxl_afu_irq_free_all(struct ocxl_context *ctx); |
| |
| #endif /* _OCXL_INTERNAL_H_ */ |