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Diffstat (limited to 'drivers/bus/fsl-mc/dprc.c')
-rw-r--r--drivers/bus/fsl-mc/dprc.c141
1 files changed, 117 insertions, 24 deletions
diff --git a/drivers/bus/fsl-mc/dprc.c b/drivers/bus/fsl-mc/dprc.c
index 602f030d84eb..57b097caf255 100644
--- a/drivers/bus/fsl-mc/dprc.c
+++ b/drivers/bus/fsl-mc/dprc.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
/*
* Copyright 2013-2016 Freescale Semiconductor Inc.
+ * Copyright 2020 NXP
*
*/
#include <linux/kernel.h>
@@ -8,6 +9,13 @@
#include "fsl-mc-private.h"
+/*
+ * cache the DPRC version to reduce the number of commands
+ * towards the mc firmware
+ */
+static u16 dprc_major_ver;
+static u16 dprc_minor_ver;
+
/**
* dprc_open() - Open DPRC object for use
* @mc_io: Pointer to MC portal's I/O object
@@ -73,6 +81,77 @@ 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
* @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
@@ -281,7 +360,7 @@ int dprc_get_attributes(struct fsl_mc_io *mc_io,
/* retrieve response parameters */
rsp_params = (struct dprc_rsp_get_attributes *)cmd.params;
attr->container_id = le32_to_cpu(rsp_params->container_id);
- attr->icid = le16_to_cpu(rsp_params->icid);
+ attr->icid = le32_to_cpu(rsp_params->icid);
attr->options = le32_to_cpu(rsp_params->options);
attr->portal_id = le32_to_cpu(rsp_params->portal_id);
@@ -443,30 +522,44 @@ int dprc_get_obj_region(struct fsl_mc_io *mc_io,
struct fsl_mc_command cmd = { 0 };
struct dprc_cmd_get_obj_region *cmd_params;
struct dprc_rsp_get_obj_region *rsp_params;
- u16 major_ver, minor_ver;
int err;
- /* prepare command */
- err = dprc_get_api_version(mc_io, 0,
- &major_ver,
- &minor_ver);
- if (err)
- return err;
-
- /**
- * MC API version 6.3 introduced a new field to the region
- * descriptor: base_address. If the older API is in use then the base
- * address is set to zero to indicate it needs to be obtained elsewhere
- * (typically the device tree).
- */
- if (major_ver > 6 || (major_ver == 6 && minor_ver >= 3))
- cmd.header =
- mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_REG_V2,
- cmd_flags, token);
- else
- cmd.header =
- mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_REG,
- cmd_flags, token);
+ /*
+ * 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;
+ }
+
+ if (dprc_major_ver > 6 || (dprc_major_ver == 6 && dprc_minor_ver >= 6)) {
+ /*
+ * MC API version 6.6 changed the size of the MC portals and software
+ * portals to 64K (as implemented by hardware). If older API is in use the
+ * size reported is less (64 bytes for mc portals and 4K for software
+ * portals).
+ */
+
+ cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_REG_V3,
+ cmd_flags, token);
+
+ } else if (dprc_major_ver == 6 && dprc_minor_ver >= 3) {
+ /*
+ * MC API version 6.3 introduced a new field to the region
+ * descriptor: base_address. If the older API is in use then the base
+ * address is set to zero to indicate it needs to be obtained elsewhere
+ * (typically the device tree).
+ */
+ cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_REG_V2,
+ cmd_flags, token);
+ } else {
+ cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_REG,
+ cmd_flags, token);
+ }
cmd_params = (struct dprc_cmd_get_obj_region *)cmd.params;
cmd_params->obj_id = cpu_to_le32(obj_id);
@@ -483,7 +576,7 @@ int dprc_get_obj_region(struct fsl_mc_io *mc_io,
rsp_params = (struct dprc_rsp_get_obj_region *)cmd.params;
region_desc->base_offset = le64_to_cpu(rsp_params->base_offset);
region_desc->size = le32_to_cpu(rsp_params->size);
- if (major_ver > 6 || (major_ver == 6 && minor_ver >= 3))
+ if (dprc_major_ver > 6 || (dprc_major_ver == 6 && dprc_minor_ver >= 3))
region_desc->base_address = le64_to_cpu(rsp_params->base_addr);
else
region_desc->base_address = 0;