bus/fsl-mc: Add dprc-reset-container support (715b02ce) · Commits · 戴 / test

drivers/bus/fsl-mc/dprc.c

+71 −0

Original line number	Diff line number	Diff line
		@@ -80,6 +80,77 @@ int dprc_close(struct fsl_mc_io *mc_io,
		}
		EXPORT_SYMBOL_GPL(dprc_close);

		/**
		* dprc_reset_container - Reset child container.
		* @mc_io: Pointer to MC portal's I/O object
		* @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
		* @token: Token of DPRC object
		* @child_container_id: ID of the container to reset
		* @options: 32 bit options:
		* - 0 (no bits set) - all the objects inside the container are
		* reset. The child containers are entered recursively and the
		* objects reset. All the objects (including the child containers)
		* are closed.
		* - bit 0 set - all the objects inside the container are reset.
		* However the child containers are not entered recursively.
		* This option is supported for API versions >= 6.5
		* In case a software context crashes or becomes non-responsive, the parent
		* may wish to reset its resources container before the software context is
		* restarted.
		*
		* This routine informs all objects assigned to the child container that the
		* container is being reset, so they may perform any cleanup operations that are
		* needed. All objects handles that were owned by the child container shall be
		* closed.
		*
		* Note that such request may be submitted even if the child software context
		* has not crashed, but the resulting object cleanup operations will not be
		* aware of that.
		*
		* Return: '0' on Success; Error code otherwise.
		*/
		int dprc_reset_container(struct fsl_mc_io *mc_io,
		u32 cmd_flags,
		u16 token,
		int child_container_id,
		u32 options)
		{
		struct fsl_mc_command cmd = { 0 };
		struct dprc_cmd_reset_container *cmd_params;
		u32 cmdid = DPRC_CMDID_RESET_CONT;
		int err;

		/*
		* If the DPRC object version was not yet cached, cache it now.
		* Otherwise use the already cached value.
		*/
		if (!dprc_major_ver && !dprc_minor_ver) {
		err = dprc_get_api_version(mc_io, 0,
		&dprc_major_ver,
		&dprc_minor_ver);
		if (err)
		return err;
		}

		/*
		* MC API 6.5 introduced a new field in the command used to pass
		* some flags.
		* Bit 0 indicates that the child containers are not recursively reset.
		*/
		if (dprc_major_ver > 6 \|\| (dprc_major_ver == 6 && dprc_minor_ver >= 5))
		cmdid = DPRC_CMDID_RESET_CONT_V2;

		/* prepare command */
		cmd.header = mc_encode_cmd_header(cmdid, cmd_flags, token);
		cmd_params = (struct dprc_cmd_reset_container *)cmd.params;
		cmd_params->child_container_id = cpu_to_le32(child_container_id);
		cmd_params->options = cpu_to_le32(options);

		/* send command to mc*/
		return mc_send_command(mc_io, &cmd);
		}
		EXPORT_SYMBOL_GPL(dprc_reset_container);

		/**
		* dprc_set_irq() - Set IRQ information for the DPRC to trigger an interrupt.
		* @mc_io: Pointer to MC portal's I/O object

drivers/bus/fsl-mc/fsl-mc-private.h

+7 −0

Original line number	Diff line number	Diff line
		@@ -91,6 +91,8 @@ int dpmcp_reset(struct fsl_mc_io *mc_io,
		#define DPRC_CMDID_GET_API_VERSION DPRC_CMD(0xa05)

		#define DPRC_CMDID_GET_ATTR DPRC_CMD(0x004)
		#define DPRC_CMDID_RESET_CONT DPRC_CMD(0x005)
		#define DPRC_CMDID_RESET_CONT_V2 DPRC_CMD_V2(0x005)

		#define DPRC_CMDID_SET_IRQ DPRC_CMD(0x010)
		#define DPRC_CMDID_SET_IRQ_ENABLE DPRC_CMD(0x012)
		@@ -111,6 +113,11 @@ struct dprc_cmd_open {
		__le32 container_id;
		};

		struct dprc_cmd_reset_container {
		__le32 child_container_id;
		__le32 options;
		};

		struct dprc_cmd_set_irq {
		/* cmd word 0 */
		__le32 irq_val;

include/linux/fsl/mc.h

+7 −0

Original line number	Diff line number	Diff line
		@@ -524,6 +524,13 @@ static inline bool is_fsl_mc_bus_dpdmai(const struct fsl_mc_device *mc_dev)
		return mc_dev->dev.type == &fsl_mc_bus_dpdmai_type;
		}

		#define DPRC_RESET_OPTION_NON_RECURSIVE 0x00000001
		int dprc_reset_container(struct fsl_mc_io *mc_io,
		u32 cmd_flags,
		u16 token,
		int child_container_id,
		u32 options);

		/*
		* Data Path Buffer Pool (DPBP) API
		* Contains initialization APIs and runtime control APIs for DPBP

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