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
13struct ocxlflash_irqs {
14 int hwirq;
15 u32 virq;
16 void __iomem *vtrig;
17};
18
19/* OCXL hardware AFU associated with the host */
20struct 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
44enum ocxlflash_ctx_state {
45 CLOSED,
46 OPENED,
47 STARTED
48};
49
50struct 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

source code of linux/drivers/scsi/cxlflash/ocxl_hw.h