diff options
Diffstat (limited to 'drivers/misc/ocxl/ocxl_internal.h')
| -rw-r--r-- | drivers/misc/ocxl/ocxl_internal.h | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/drivers/misc/ocxl/ocxl_internal.h b/drivers/misc/ocxl/ocxl_internal.h new file mode 100644 index 000000000000..04fc160c7bd5 --- /dev/null +++ b/drivers/misc/ocxl/ocxl_internal.h @@ -0,0 +1,193 @@ +// 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> + +#define OCXL_AFU_NAME_SZ (24+1) /* add 1 for NULL termination */ +#define MAX_IRQ_PER_LINK 2000 +#define MAX_IRQ_PER_CONTEXT MAX_IRQ_PER_LINK + +#define to_ocxl_function(d) container_of(d, struct ocxl_fn, dev) +#define to_ocxl_afu(d) container_of(d, struct ocxl_afu, dev) + +extern struct pci_driver ocxl_pci_driver; + +/* + * The following 2 structures are a fairly generic way of representing + * the configuration data for a function and AFU, as read from the + * configuration space. + */ +struct ocxl_afu_config { + u8 idx; + int dvsec_afu_control_pos; + char name[OCXL_AFU_NAME_SZ]; + u8 version_major; + u8 version_minor; + u8 afuc_type; + u8 afum_type; + u8 profile; + u8 global_mmio_bar; + u64 global_mmio_offset; + u32 global_mmio_size; + u8 pp_mmio_bar; + u64 pp_mmio_offset; + u32 pp_mmio_stride; + u8 log_mem_size; + u8 pasid_supported_log; + u16 actag_supported; +}; + +struct ocxl_fn_config { + int dvsec_tl_pos; + int dvsec_function_pos; + int dvsec_afu_info_pos; + s8 max_pasid_log; + s8 max_afu_index; +}; + +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_afu { + struct ocxl_fn *fn; + struct list_head list; + struct device dev; + struct cdev cdev; + 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; + struct bin_attribute attr_global_mmio; +}; + +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; +}; + +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; +}; + + +extern struct ocxl_afu *ocxl_afu_get(struct ocxl_afu *afu); +extern void ocxl_afu_put(struct ocxl_afu *afu); + +extern int ocxl_create_cdev(struct ocxl_afu *afu); +extern void ocxl_destroy_cdev(struct ocxl_afu *afu); +extern int ocxl_register_afu(struct ocxl_afu *afu); +extern void ocxl_unregister_afu(struct ocxl_afu *afu); + +extern int ocxl_file_init(void); +extern void ocxl_file_exit(void); + +extern int ocxl_config_read_function(struct pci_dev *dev, + struct ocxl_fn_config *fn); + +extern int ocxl_config_check_afu_index(struct pci_dev *dev, + struct ocxl_fn_config *fn, int afu_idx); +extern int ocxl_config_read_afu(struct pci_dev *dev, + struct ocxl_fn_config *fn, + struct ocxl_afu_config *afu, + u8 afu_idx); +extern int ocxl_config_get_pasid_info(struct pci_dev *dev, int *count); +extern void ocxl_config_set_afu_pasid(struct pci_dev *dev, + int afu_control, + int pasid_base, u32 pasid_count_log); +extern int ocxl_config_get_actag_info(struct pci_dev *dev, + u16 *base, u16 *enabled, u16 *supported); +extern void ocxl_config_set_actag(struct pci_dev *dev, int func_dvsec, + u32 tag_first, u32 tag_count); +extern void ocxl_config_set_afu_actag(struct pci_dev *dev, int afu_control, + int actag_base, int actag_count); +extern void ocxl_config_set_afu_state(struct pci_dev *dev, int afu_control, + int enable); +extern int ocxl_config_set_TL(struct pci_dev *dev, int tl_dvsec); +extern int ocxl_config_terminate_pasid(struct pci_dev *dev, int afu_control, + int pasid); + +extern int ocxl_link_setup(struct pci_dev *dev, int PE_mask, + void **link_handle); +extern void ocxl_link_release(struct pci_dev *dev, void *link_handle); +extern int ocxl_link_add_pe(void *link_handle, int pasid, u32 pidr, u32 tidr, + u64 amr, struct mm_struct *mm, + void (*xsl_err_cb)(void *data, u64 addr, u64 dsisr), + void *xsl_err_data); +extern int ocxl_link_remove_pe(void *link_handle, int pasid); +extern int ocxl_link_irq_alloc(void *link_handle, int *hw_irq, + u64 *addr); +extern void ocxl_link_free_irq(void *link_handle, int hw_irq); + +extern int ocxl_pasid_afu_alloc(struct ocxl_fn *fn, u32 size); +extern void ocxl_pasid_afu_free(struct ocxl_fn *fn, u32 start, u32 size); +extern int ocxl_actag_afu_alloc(struct ocxl_fn *fn, u32 size); +extern void ocxl_actag_afu_free(struct ocxl_fn *fn, u32 start, u32 size); + +extern struct ocxl_context *ocxl_context_alloc(void); +extern int ocxl_context_init(struct ocxl_context *ctx, struct ocxl_afu *afu, + struct address_space *mapping); +extern int ocxl_context_attach(struct ocxl_context *ctx, u64 amr); +extern int ocxl_context_mmap(struct ocxl_context *ctx, + struct vm_area_struct *vma); +extern int ocxl_context_detach(struct ocxl_context *ctx); +extern void ocxl_context_detach_all(struct ocxl_afu *afu); +extern void ocxl_context_free(struct ocxl_context *ctx); + +extern int ocxl_sysfs_add_afu(struct ocxl_afu *afu); +extern void ocxl_sysfs_remove_afu(struct ocxl_afu *afu); + +#endif /* _OCXL_INTERNAL_H_ */ |