include/soc/fsl/dpaa2-io.h

   1 /* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
   2 /*
   3  * Copyright 2014-2016 Freescale Semiconductor Inc.
   4  * Copyright NXP
   5  *
   6  */
   7 #ifndef __FSL_DPAA2_IO_H
   8 #define __FSL_DPAA2_IO_H
   9
  10 #include <linux/types.h>
  11 #include <linux/cpumask.h>
  12 #include <linux/irqreturn.h>
  13
  14 #include "dpaa2-fd.h"
  15 #include "dpaa2-global.h"
  16
  17 struct dpaa2_io;
  18 struct dpaa2_io_store;
  19 struct device;
  20
  21 /**
  22  * DOC: DPIO Service
  23  *
  24  * The DPIO service provides APIs for users to interact with the datapath
  25  * by enqueueing and dequeing frame descriptors.
  26  *
  27  * The following set of APIs can be used to enqueue and dequeue frames
  28  * as well as producing notification callbacks when data is available
  29  * for dequeue.
  30  */
  31
  32 #define DPAA2_IO_ANY_CPU        -1
  33
  34 /**
  35  * struct dpaa2_io_desc - The DPIO descriptor
  36  * @receives_notifications: Use notificaton mode. Non-zero if the DPIO
  37  *                  has a channel.
  38  * @has_8prio:      Set to non-zero for channel with 8 priority WQs.  Ignored
  39  *                  unless receives_notification is TRUE.
  40  * @cpu:            The cpu index that at least interrupt handlers will
  41  *                  execute on.
  42  * @stash_affinity: The stash affinity for this portal favour 'cpu'
  43  * @regs_cena:      The cache enabled regs.
  44  * @regs_cinh:      The cache inhibited regs
  45  * @dpio_id:        The dpio index
  46  * @qman_version:   The qman version
  47  *
  48  * Describes the attributes and features of the DPIO object.
  49  */
  50 struct dpaa2_io_desc {
  51         int receives_notifications;
  52         int has_8prio;
  53         int cpu;
  54         void *regs_cena;
  55         void __iomem *regs_cinh;
  56         int dpio_id;
  57         u32 qman_version;
  58 };
  59
  60 struct dpaa2_io *dpaa2_io_create(const struct dpaa2_io_desc *desc,
  61                                  struct device *dev);
  62
  63 void dpaa2_io_down(struct dpaa2_io *d);
  64
  65 irqreturn_t dpaa2_io_irq(struct dpaa2_io *obj);
  66
  67 struct dpaa2_io *dpaa2_io_service_select(int cpu);
  68
  69 /**
  70  * struct dpaa2_io_notification_ctx - The DPIO notification context structure
  71  * @cb:           The callback to be invoked when the notification arrives
  72  * @is_cdan:      Zero for FQDAN, non-zero for CDAN
  73  * @id:           FQID or channel ID, needed for rearm
  74  * @desired_cpu:  The cpu on which the notifications will show up. Use
  75  *                DPAA2_IO_ANY_CPU if don't care
  76  * @dpio_id:      The dpio index
  77  * @qman64:       The 64-bit context value shows up in the FQDAN/CDAN.
  78  * @node:         The list node
  79  * @dpio_private: The dpio object internal to dpio_service
  80  *
  81  * Used when a FQDAN/CDAN registration is made by drivers.
  82  */
  83 struct dpaa2_io_notification_ctx {
  84         void (*cb)(struct dpaa2_io_notification_ctx *ctx);
  85         int is_cdan;
  86         u32 id;
  87         int desired_cpu;
  88         int dpio_id;
  89         u64 qman64;
  90         struct list_head node;
  91         void *dpio_private;
  92 };
  93
  94 int dpaa2_io_get_cpu(struct dpaa2_io *d);
  95
  96 int dpaa2_io_service_register(struct dpaa2_io *service,
  97                               struct dpaa2_io_notification_ctx *ctx,
  98                               struct device *dev);
  99 void dpaa2_io_service_deregister(struct dpaa2_io *service,
 100                                  struct dpaa2_io_notification_ctx *ctx,
 101                                  struct device *dev);
 102 int dpaa2_io_service_rearm(struct dpaa2_io *service,
 103                            struct dpaa2_io_notification_ctx *ctx);
 104
 105 int dpaa2_io_service_pull_fq(struct dpaa2_io *d, u32 fqid,
 106                              struct dpaa2_io_store *s);
 107 int dpaa2_io_service_pull_channel(struct dpaa2_io *d, u32 channelid,
 108                                   struct dpaa2_io_store *s);
 109
 110 int dpaa2_io_service_enqueue_fq(struct dpaa2_io *d, u32 fqid,
 111                                 const struct dpaa2_fd *fd);
 112 int dpaa2_io_service_enqueue_qd(struct dpaa2_io *d, u32 qdid, u8 prio,
 113                                 u16 qdbin, const struct dpaa2_fd *fd);
 114 int dpaa2_io_service_release(struct dpaa2_io *d, u16 bpid,
 115                              const u64 *buffers, unsigned int num_buffers);
 116 int dpaa2_io_service_acquire(struct dpaa2_io *d, u16 bpid,
 117                              u64 *buffers, unsigned int num_buffers);
 118
 119 struct dpaa2_io_store *dpaa2_io_store_create(unsigned int max_frames,
 120                                              struct device *dev);
 121 void dpaa2_io_store_destroy(struct dpaa2_io_store *s);
 122 struct dpaa2_dq *dpaa2_io_store_next(struct dpaa2_io_store *s, int *is_last);
 123
 124 int dpaa2_io_query_fq_count(struct dpaa2_io *d, u32 fqid,
 125                             u32 *fcnt, u32 *bcnt);
 126 int dpaa2_io_query_bp_count(struct dpaa2_io *d, u16 bpid,
 127                             u32 *num);
 128 #endif /* __FSL_DPAA2_IO_H */