LXR linux/drivers/iommu/fsl_pamu

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 *
   4 * Copyright (C) 2013 Freescale Semiconductor, Inc.
   5 */
   6
   7#ifndef __FSL_PAMU_DOMAIN_H
   8#define __FSL_PAMU_DOMAIN_H
   9
  10#include "fsl_pamu.h"
  11
  12struct dma_window {
  13        phys_addr_t paddr;
  14        u64 size;
  15        int valid;
  16        int prot;
  17};
  18
  19struct fsl_dma_domain {
  20        /*
  21         * Indicates the geometry size for the domain.
  22         * This would be set when the geometry is
  23         * configured for the domain.
  24         */
  25        dma_addr_t                      geom_size;
  26        /*
  27         * Number of windows assocaited with this domain.
  28         * During domain initialization, it is set to the
  29         * the maximum number of subwindows allowed for a LIODN.
  30         * Minimum value for this is 1 indicating a single PAMU
  31         * window, without any sub windows. Value can be set/
  32         * queried by set_attr/get_attr API for DOMAIN_ATTR_WINDOWS.
  33         * Value can only be set once the geometry has been configured.
  34         */
  35        u32                             win_cnt;
  36        /*
  37         * win_arr contains information of the configured
  38         * windows for a domain. This is allocated only
  39         * when the number of windows for the domain are
  40         * set.
  41         */
  42        struct dma_window               *win_arr;
  43        /* list of devices associated with the domain */
  44        struct list_head                devices;
  45        /* dma_domain states:
  46         * mapped - A particular mapping has been created
  47         * within the configured geometry.
  48         * enabled - DMA has been enabled for the given
  49         * domain. This translates to setting of the
  50         * valid bit for the primary PAACE in the PAMU
  51         * PAACT table. Domain geometry should be set and
  52         * it must have a valid mapping before DMA can be
  53         * enabled for it.
  54         *
  55         */
  56        int                             mapped;
  57        int                             enabled;
  58        /* stash_id obtained from the stash attribute details */
  59        u32                             stash_id;
  60        struct pamu_stash_attribute     dma_stash;
  61        u32                             snoop_id;
  62        struct iommu_domain             iommu_domain;
  63        spinlock_t                      domain_lock;
  64};
  65
  66/* domain-device relationship */
  67struct device_domain_info {
  68        struct list_head link;  /* link to domain siblings */
  69        struct device *dev;
  70        u32 liodn;
  71        struct fsl_dma_domain *domain; /* pointer to domain */
  72};
  73#endif  /* __FSL_PAMU_DOMAIN_H */
  74