drivers/scsi/cxlflash/ocxl_hw.h

   1 /*
   2  * CXL Flash Device Driver
   3  *
   4  * Written by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>, IBM Corporation
   5  *             Uma Krishnan <ukrishn@linux.vnet.ibm.com>, IBM Corporation
   6  *
   7  * Copyright (C) 2018 IBM Corporation
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation; either version
  12  * 2 of the License, or (at your option) any later version.
  13  */
  14
  15 /* OCXL hardware AFU associated with the host */
  16 struct ocxl_hw_afu {
  17         struct ocxlflash_context *ocxl_ctx; /* Host context */
  18         struct pci_dev *pdev;           /* PCI device */
  19         struct device *dev;             /* Generic device */
  20         bool perst_same_image;          /* Same image loaded on perst */
  21
  22         struct ocxl_fn_config fcfg;     /* DVSEC config of the function */
  23         struct ocxl_afu_config acfg;    /* AFU configuration data */
  24
  25         int fn_actag_base;              /* Function acTag base */
  26         int fn_actag_enabled;           /* Function acTag number enabled */
  27         int afu_actag_base;             /* AFU acTag base */
  28         int afu_actag_enabled;          /* AFU acTag number enabled */
  29
  30         phys_addr_t ppmmio_phys;        /* Per process MMIO space */
  31         phys_addr_t gmmio_phys;         /* Global AFU MMIO space */
  32         void __iomem *gmmio_virt;       /* Global MMIO map */
  33
  34         void *link_token;               /* Link token for the SPA */
  35         struct idr idr;                 /* IDR to manage contexts */
  36         int max_pasid;                  /* Maximum number of contexts */
  37         bool is_present;                /* Function has AFUs defined */
  38 };
  39
  40 struct ocxlflash_context {
  41         struct ocxl_hw_afu *hw_afu;     /* HW AFU back pointer */
  42         struct address_space *mapping;  /* Mapping for pseudo filesystem */
  43         bool master;                    /* Whether this is a master context */
  44         int pe;                         /* Process element */
  45
  46         phys_addr_t psn_phys;           /* Process mapping */
  47         u64 psn_size;                   /* Process mapping size */
  48 };