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154 lines
3.9 KiB
154 lines
3.9 KiB
/* SPDX-License-Identifier: GPL-2.0+ */ |
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// Copyright 2017 IBM Corp. |
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#ifndef _OCXL_INTERNAL_H_ |
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#define _OCXL_INTERNAL_H_ |
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#include <linux/pci.h> |
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#include <linux/cdev.h> |
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#include <linux/list.h> |
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#include <misc/ocxl.h> |
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#define MAX_IRQ_PER_LINK 2000 |
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#define MAX_IRQ_PER_CONTEXT MAX_IRQ_PER_LINK |
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extern struct pci_driver ocxl_pci_driver; |
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struct ocxl_fn { |
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struct device dev; |
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int bar_used[3]; |
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struct ocxl_fn_config config; |
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struct list_head afu_list; |
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int pasid_base; |
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int actag_base; |
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int actag_enabled; |
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int actag_supported; |
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struct list_head pasid_list; |
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struct list_head actag_list; |
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void *link; |
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}; |
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struct ocxl_file_info { |
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struct ocxl_afu *afu; |
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struct device dev; |
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struct cdev cdev; |
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struct bin_attribute attr_global_mmio; |
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}; |
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struct ocxl_afu { |
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struct kref kref; |
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struct ocxl_fn *fn; |
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struct list_head list; |
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struct ocxl_afu_config config; |
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int pasid_base; |
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int pasid_count; /* opened contexts */ |
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int pasid_max; /* maximum number of contexts */ |
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int actag_base; |
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int actag_enabled; |
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struct mutex contexts_lock; |
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struct idr contexts_idr; |
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struct mutex afu_control_lock; |
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u64 global_mmio_start; |
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u64 irq_base_offset; |
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void __iomem *global_mmio_ptr; |
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u64 pp_mmio_start; |
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void *private; |
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}; |
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enum ocxl_context_status { |
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CLOSED, |
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OPENED, |
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ATTACHED, |
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}; |
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// Contains metadata about a translation fault |
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struct ocxl_xsl_error { |
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u64 addr; // The address that triggered the fault |
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u64 dsisr; // the value of the dsisr register |
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u64 count; // The number of times this fault has been triggered |
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}; |
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struct ocxl_context { |
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struct ocxl_afu *afu; |
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int pasid; |
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struct mutex status_mutex; |
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enum ocxl_context_status status; |
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struct address_space *mapping; |
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struct mutex mapping_lock; |
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wait_queue_head_t events_wq; |
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struct mutex xsl_error_lock; |
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struct ocxl_xsl_error xsl_error; |
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struct mutex irq_lock; |
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struct idr irq_idr; |
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u16 tidr; // Thread ID used for P9 wait implementation |
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}; |
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struct ocxl_process_element { |
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__be64 config_state; |
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__be32 pasid; |
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__be16 bdf; |
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__be16 reserved1; |
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__be32 reserved2[9]; |
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__be32 lpid; |
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__be32 tid; |
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__be32 pid; |
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__be32 reserved3[10]; |
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__be64 amr; |
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__be32 reserved4[3]; |
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__be32 software_state; |
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}; |
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int ocxl_create_cdev(struct ocxl_afu *afu); |
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void ocxl_destroy_cdev(struct ocxl_afu *afu); |
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int ocxl_file_register_afu(struct ocxl_afu *afu); |
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void ocxl_file_unregister_afu(struct ocxl_afu *afu); |
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int ocxl_file_init(void); |
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void ocxl_file_exit(void); |
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int ocxl_pasid_afu_alloc(struct ocxl_fn *fn, u32 size); |
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void ocxl_pasid_afu_free(struct ocxl_fn *fn, u32 start, u32 size); |
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int ocxl_actag_afu_alloc(struct ocxl_fn *fn, u32 size); |
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void ocxl_actag_afu_free(struct ocxl_fn *fn, u32 start, u32 size); |
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/* |
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* Get the max PASID value that can be used by the function |
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*/ |
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int ocxl_config_get_pasid_info(struct pci_dev *dev, int *count); |
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/* |
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* Control whether the FPGA is reloaded on a link reset |
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*/ |
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int ocxl_config_get_reset_reload(struct pci_dev *dev, int *val); |
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int ocxl_config_set_reset_reload(struct pci_dev *dev, int val); |
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/* |
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* Check if an AFU index is valid for the given function. |
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* |
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* AFU indexes can be sparse, so a driver should check all indexes up |
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* to the maximum found in the function description |
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*/ |
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int ocxl_config_check_afu_index(struct pci_dev *dev, |
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struct ocxl_fn_config *fn, int afu_idx); |
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/** |
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* ocxl_link_update_pe() - Update values within a Process Element |
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* @link_handle: the link handle associated with the process element |
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* @pasid: the PASID for the AFU context |
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* @tid: the new thread id for the process element |
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* |
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* Returns 0 on success |
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*/ |
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int ocxl_link_update_pe(void *link_handle, int pasid, __u16 tid); |
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int ocxl_context_mmap(struct ocxl_context *ctx, |
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struct vm_area_struct *vma); |
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void ocxl_context_detach_all(struct ocxl_afu *afu); |
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int ocxl_sysfs_register_afu(struct ocxl_file_info *info); |
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void ocxl_sysfs_unregister_afu(struct ocxl_file_info *info); |
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int ocxl_irq_offset_to_id(struct ocxl_context *ctx, u64 offset); |
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u64 ocxl_irq_id_to_offset(struct ocxl_context *ctx, int irq_id); |
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void ocxl_afu_irq_free_all(struct ocxl_context *ctx); |
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#endif /* _OCXL_INTERNAL_H_ */
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