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