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
6 DPRC-reset is required for VFIO and is missing from
8 This patch added reset-container support.
10 Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
11 Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
13 drivers/bus/fsl-mc/dprc.c | 41 +++++++++++++++++++++++++++++++++++++
14 drivers/bus/fsl-mc/fsl-mc-private.h | 10 +++++++++
15 2 files changed, 51 insertions(+)
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);
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
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
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
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
42 + * Return: '0' on Success; Error code otherwise.
44 +int dprc_reset_container(struct fsl_mc_io *mc_io,
47 + int child_container_id)
49 + struct fsl_mc_command cmd = { 0 };
50 + struct dprc_cmd_reset_container *cmd_params;
52 + /* prepare command */
53 + cmd.header = mc_encode_cmd_header(DPRC_CMDID_RESET_CONT,
55 + cmd_params = (struct dprc_cmd_reset_container *)cmd.params;
56 + cmd_params->child_container_id = cpu_to_le32(child_container_id);
58 + /* send command to mc*/
59 + return mc_send_command(mc_io, &cmd);
61 +EXPORT_SYMBOL_GPL(dprc_reset_container);
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)
72 #define DPRC_CMDID_GET_ATTR DPRC_CMD(0x004)
73 +#define DPRC_CMDID_RESET_CONT DPRC_CMD(0x005)
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 {
81 +struct dprc_cmd_reset_container {
82 + __le32 child_container_id;
85 struct dprc_cmd_set_irq {
88 @@ -394,6 +399,11 @@ int dprc_get_container_id(struct fsl_mc_
92 +int dprc_reset_container(struct fsl_mc_io *mc_io,
95 + int child_container_id);
98 * Data Path Buffer Pool (DPBP) API