target/linux/layerscape/patches-5.4/701-net-0134-bus-fsl-mc-Add-dprc-reset-container-support.patch

   1 From 350201cc09a58dcf5c49f636238b01637f5ee06d Mon Sep 17 00:00:00 2001
   2 From: Laurentiu Tudor <laurentiu.tudor@nxp.com>
   3 Date: Fri, 13 Apr 2018 11:35:10 +0300
   4 Subject: [PATCH] bus: fsl-mc: Add dprc-reset-container support
   5
   6 DPRC-reset is required for VFIO and is missing from
   7 mc-bus support.
   8 This patch added reset-container support.
   9
  10 Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
  11 Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
  12 ---
  13  drivers/bus/fsl-mc/dprc.c           | 41 +++++++++++++++++++++++++++++++++++++
  14  drivers/bus/fsl-mc/fsl-mc-private.h | 10 +++++++++
  15  2 files changed, 51 insertions(+)
  16
  17 --- a/drivers/bus/fsl-mc/dprc.c
  18 +++ b/drivers/bus/fsl-mc/dprc.c
  19 @@ -73,6 +73,47 @@ int dprc_close(struct fsl_mc_io *mc_io,
  20  EXPORT_SYMBOL_GPL(dprc_close);
  21
  22  /**
  23 + * dprc_reset_container - Reset child container.
  24 + * @mc_io:     Pointer to MC portal's I/O object
  25 + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
  26 + * @token:     Token of DPRC object
  27 + * @child_container_id:        ID of the container to reset
  28 + *
  29 + * In case a software context crashes or becomes non-responsive, the parent
  30 + * may wish to reset its resources container before the software context is
  31 + * restarted.
  32 + *
  33 + * This routine informs all objects assigned to the child container that the
  34 + * container is being reset, so they may perform any cleanup operations that are
  35 + * needed. All objects handles that were owned by the child container shall be
  36 + * closed.
  37 + *
  38 + * Note that such request may be submitted even if the child software context
  39 + * has not crashed, but the resulting object cleanup operations will not be
  40 + * aware of that.
  41 + *
  42 + * Return:     '0' on Success; Error code otherwise.
  43 + */
  44 +int dprc_reset_container(struct fsl_mc_io *mc_io,
  45 +                        u32 cmd_flags,
  46 +                        u16 token,
  47 +                        int child_container_id)
  48 +{
  49 +       struct fsl_mc_command cmd = { 0 };
  50 +       struct dprc_cmd_reset_container *cmd_params;
  51 +
  52 +       /* prepare command */
  53 +       cmd.header = mc_encode_cmd_header(DPRC_CMDID_RESET_CONT,
  54 +                                         cmd_flags, token);
  55 +       cmd_params = (struct dprc_cmd_reset_container *)cmd.params;
  56 +       cmd_params->child_container_id = cpu_to_le32(child_container_id);
  57 +
  58 +       /* send command to mc*/
  59 +       return mc_send_command(mc_io, &cmd);
  60 +}
  61 +EXPORT_SYMBOL_GPL(dprc_reset_container);
  62 +
  63 +/**
  64   * dprc_set_irq() - Set IRQ information for the DPRC to trigger an interrupt.
  65   * @mc_io:     Pointer to MC portal's I/O object
  66   * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
  67 --- a/drivers/bus/fsl-mc/fsl-mc-private.h
  68 +++ b/drivers/bus/fsl-mc/fsl-mc-private.h
  69 @@ -93,6 +93,7 @@ int dpmcp_reset(struct fsl_mc_io *mc_io,
  70  #define DPRC_CMDID_GET_API_VERSION              DPRC_CMD(0xa05)
  71
  72  #define DPRC_CMDID_GET_ATTR                     DPRC_CMD(0x004)
  73 +#define DPRC_CMDID_RESET_CONT                   DPRC_CMD(0x005)
  74
  75  #define DPRC_CMDID_SET_IRQ                      DPRC_CMD(0x010)
  76  #define DPRC_CMDID_SET_IRQ_ENABLE               DPRC_CMD(0x012)
  77 @@ -111,6 +112,10 @@ struct dprc_cmd_open {
  78         __le32 container_id;
  79  };
  80
  81 +struct dprc_cmd_reset_container {
  82 +       __le32 child_container_id;
  83 +};
  84 +
  85  struct dprc_cmd_set_irq {
  86         /* cmd word 0 */
  87         __le32 irq_val;
  88 @@ -394,6 +399,11 @@ int dprc_get_container_id(struct fsl_mc_
  89                           u32 cmd_flags,
  90                           int *container_id);
  91
  92 +int dprc_reset_container(struct fsl_mc_io *mc_io,
  93 +                        u32 cmd_flags,
  94 +                        u16 token,
  95 +                        int child_container_id);
  96 +
  97  /*
  98   * Data Path Buffer Pool (DPBP) API
  99   */