1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * CXL Flash Device Driver 4 * 5 * Written by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>, IBM Corporation 6 * Uma Krishnan <ukrishn@linux.vnet.ibm.com>, IBM Corporation 7 * 8 * Copyright (C) 2018 IBM Corporation 9 */ 10 11 #define OCXL_MAX_IRQS 4 /* Max interrupts per process */ 12 13 struct ocxlflash_irqs { 14 int hwirq; 15 u32 virq; 16 void __iomem *vtrig; 17 }; 18 19 /* OCXL hardware AFU associated with the host */ 20 struct ocxl_hw_afu { 21 struct ocxlflash_context *ocxl_ctx; /* Host context */ 22 struct pci_dev *pdev; /* PCI device */ 23 struct device *dev; /* Generic device */ 24 bool perst_same_image; /* Same image loaded on perst */ 25 26 struct ocxl_fn_config fcfg; /* DVSEC config of the function */ 27 struct ocxl_afu_config acfg; /* AFU configuration data */ 28 29 int fn_actag_base; /* Function acTag base */ 30 int fn_actag_enabled; /* Function acTag number enabled */ 31 int afu_actag_base; /* AFU acTag base */ 32 int afu_actag_enabled; /* AFU acTag number enabled */ 33 34 phys_addr_t ppmmio_phys; /* Per process MMIO space */ 35 phys_addr_t gmmio_phys; /* Global AFU MMIO space */ 36 void __iomem *gmmio_virt; /* Global MMIO map */ 37 38 void *link_token; /* Link token for the SPA */ 39 struct idr idr; /* IDR to manage contexts */ 40 int max_pasid; /* Maximum number of contexts */ 41 bool is_present; /* Function has AFUs defined */ 42 }; 43 44 enum ocxlflash_ctx_state { 45 CLOSED, 46 OPENED, 47 STARTED 48 }; 49 50 struct ocxlflash_context { 51 struct ocxl_hw_afu *hw_afu; /* HW AFU back pointer */ 52 struct address_space *mapping; /* Mapping for pseudo filesystem */ 53 bool master; /* Whether this is a master context */ 54 int pe; /* Process element */ 55 56 phys_addr_t psn_phys; /* Process mapping */ 57 u64 psn_size; /* Process mapping size */ 58 59 spinlock_t slock; /* Protects irq/fault/event updates */ 60 wait_queue_head_t wq; /* Wait queue for poll and interrupts */ 61 struct mutex state_mutex; /* Mutex to update context state */ 62 enum ocxlflash_ctx_state state; /* Context state */ 63 64 struct ocxlflash_irqs *irqs; /* Pointer to array of structures */ 65 int num_irqs; /* Number of interrupts */ 66 bool pending_irq; /* Pending interrupt on the context */ 67 ulong irq_bitmap; /* Bits indicating pending irq num */ 68 69 u64 fault_addr; /* Address that triggered the fault */ 70 u64 fault_dsisr; /* Value of dsisr register at fault */ 71 bool pending_fault; /* Pending translation fault */ 72 }; 73