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- /*
- * CXL Flash Device Driver
- *
- * Written by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>, IBM Corporation
- * Uma Krishnan <ukrishn@linux.vnet.ibm.com>, IBM Corporation
- *
- * Copyright (C) 2018 IBM Corporation
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- #define OCXL_MAX_IRQS 4 /* Max interrupts per process */
- struct ocxlflash_irqs {
- int hwirq;
- u32 virq;
- u64 ptrig;
- void __iomem *vtrig;
- };
- /* OCXL hardware AFU associated with the host */
- struct ocxl_hw_afu {
- struct ocxlflash_context *ocxl_ctx; /* Host context */
- struct pci_dev *pdev; /* PCI device */
- struct device *dev; /* Generic device */
- bool perst_same_image; /* Same image loaded on perst */
- struct ocxl_fn_config fcfg; /* DVSEC config of the function */
- struct ocxl_afu_config acfg; /* AFU configuration data */
- int fn_actag_base; /* Function acTag base */
- int fn_actag_enabled; /* Function acTag number enabled */
- int afu_actag_base; /* AFU acTag base */
- int afu_actag_enabled; /* AFU acTag number enabled */
- phys_addr_t ppmmio_phys; /* Per process MMIO space */
- phys_addr_t gmmio_phys; /* Global AFU MMIO space */
- void __iomem *gmmio_virt; /* Global MMIO map */
- void *link_token; /* Link token for the SPA */
- struct idr idr; /* IDR to manage contexts */
- int max_pasid; /* Maximum number of contexts */
- bool is_present; /* Function has AFUs defined */
- };
- enum ocxlflash_ctx_state {
- CLOSED,
- OPENED,
- STARTED
- };
- struct ocxlflash_context {
- struct ocxl_hw_afu *hw_afu; /* HW AFU back pointer */
- struct address_space *mapping; /* Mapping for pseudo filesystem */
- bool master; /* Whether this is a master context */
- int pe; /* Process element */
- phys_addr_t psn_phys; /* Process mapping */
- u64 psn_size; /* Process mapping size */
- spinlock_t slock; /* Protects irq/fault/event updates */
- wait_queue_head_t wq; /* Wait queue for poll and interrupts */
- struct mutex state_mutex; /* Mutex to update context state */
- enum ocxlflash_ctx_state state; /* Context state */
- struct ocxlflash_irqs *irqs; /* Pointer to array of structures */
- int num_irqs; /* Number of interrupts */
- bool pending_irq; /* Pending interrupt on the context */
- ulong irq_bitmap; /* Bits indicating pending irq num */
- u64 fault_addr; /* Address that triggered the fault */
- u64 fault_dsisr; /* Value of dsisr register at fault */
- bool pending_fault; /* Pending translation fault */
- };
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