100 lines
3.3 KiB
Diff
100 lines
3.3 KiB
Diff
From 350201cc09a58dcf5c49f636238b01637f5ee06d Mon Sep 17 00:00:00 2001
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From: Laurentiu Tudor <laurentiu.tudor@nxp.com>
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Date: Fri, 13 Apr 2018 11:35:10 +0300
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Subject: [PATCH] bus: fsl-mc: Add dprc-reset-container support
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DPRC-reset is required for VFIO and is missing from
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mc-bus support.
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This patch added reset-container support.
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Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
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Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
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---
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drivers/bus/fsl-mc/dprc.c | 41 +++++++++++++++++++++++++++++++++++++
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drivers/bus/fsl-mc/fsl-mc-private.h | 10 +++++++++
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2 files changed, 51 insertions(+)
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--- a/drivers/bus/fsl-mc/dprc.c
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+++ b/drivers/bus/fsl-mc/dprc.c
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@@ -73,6 +73,47 @@ int dprc_close(struct fsl_mc_io *mc_io,
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EXPORT_SYMBOL_GPL(dprc_close);
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/**
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+ * dprc_reset_container - Reset child container.
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+ * @mc_io: Pointer to MC portal's I/O object
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+ * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
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+ * @token: Token of DPRC object
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+ * @child_container_id: ID of the container to reset
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+ *
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+ * In case a software context crashes or becomes non-responsive, the parent
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+ * may wish to reset its resources container before the software context is
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+ * restarted.
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+ *
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+ * This routine informs all objects assigned to the child container that the
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+ * container is being reset, so they may perform any cleanup operations that are
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+ * needed. All objects handles that were owned by the child container shall be
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+ * closed.
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+ *
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+ * Note that such request may be submitted even if the child software context
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+ * has not crashed, but the resulting object cleanup operations will not be
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+ * aware of that.
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+ *
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+ * Return: '0' on Success; Error code otherwise.
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+ */
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+int dprc_reset_container(struct fsl_mc_io *mc_io,
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+ u32 cmd_flags,
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+ u16 token,
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+ int child_container_id)
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+{
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+ struct fsl_mc_command cmd = { 0 };
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+ struct dprc_cmd_reset_container *cmd_params;
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+
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+ /* prepare command */
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+ cmd.header = mc_encode_cmd_header(DPRC_CMDID_RESET_CONT,
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+ cmd_flags, token);
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+ cmd_params = (struct dprc_cmd_reset_container *)cmd.params;
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+ cmd_params->child_container_id = cpu_to_le32(child_container_id);
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+
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+ /* send command to mc*/
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+ return mc_send_command(mc_io, &cmd);
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+}
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+EXPORT_SYMBOL_GPL(dprc_reset_container);
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+
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+/**
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* dprc_set_irq() - Set IRQ information for the DPRC to trigger an interrupt.
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* @mc_io: Pointer to MC portal's I/O object
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* @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
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--- a/drivers/bus/fsl-mc/fsl-mc-private.h
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+++ b/drivers/bus/fsl-mc/fsl-mc-private.h
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@@ -93,6 +93,7 @@ int dpmcp_reset(struct fsl_mc_io *mc_io,
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#define DPRC_CMDID_GET_API_VERSION DPRC_CMD(0xa05)
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#define DPRC_CMDID_GET_ATTR DPRC_CMD(0x004)
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+#define DPRC_CMDID_RESET_CONT DPRC_CMD(0x005)
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#define DPRC_CMDID_SET_IRQ DPRC_CMD(0x010)
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#define DPRC_CMDID_SET_IRQ_ENABLE DPRC_CMD(0x012)
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@@ -111,6 +112,10 @@ struct dprc_cmd_open {
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__le32 container_id;
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};
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+struct dprc_cmd_reset_container {
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+ __le32 child_container_id;
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+};
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+
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struct dprc_cmd_set_irq {
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/* cmd word 0 */
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__le32 irq_val;
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@@ -394,6 +399,11 @@ int dprc_get_container_id(struct fsl_mc_
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u32 cmd_flags,
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int *container_id);
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+int dprc_reset_container(struct fsl_mc_io *mc_io,
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+ u32 cmd_flags,
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+ u16 token,
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+ int child_container_id);
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+
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/*
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* Data Path Buffer Pool (DPBP) API
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*/
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