// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
/*
* Copyright 2013 - 2016 Freescale Semiconductor Inc .
* Copyright 2020 NXP
*
*/
#include <linux/kernel.h>
#include <linux/fsl/mc.h>
#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
* @ cmd_flags : Command flags ; one or more of ' MC_CMD_FLAG_ '
* @ container_id : Container ID to open
* @ token : Returned token of DPRC object
*
* Return : ' 0 ' on Success ; Error code otherwise .
*
* @ warning Required before any operation on the object .
*/
int dprc_open(struct fsl_mc_io *mc_io,
u32 cmd_flags,
int container_id,
u16 *token)
{
struct fsl_mc_command cmd = { 0 };
struct dprc_cmd_open *cmd_params;
int err;
/* prepare command */
cmd.header = mc_encode_cmd_header(DPRC_CMDID_OPEN, cmd_flags,
0 );
cmd_params = (struct dprc_cmd_open *)cmd.params;
cmd_params->container_id = cpu_to_le32(container_id);
/* send command to mc*/
err = mc_send_command(mc_io, &cmd);
if (err)
return err;
/* retrieve response parameters */
*token = mc_cmd_hdr_read_token(&cmd);
return 0 ;
}
EXPORT_SYMBOL_GPL(dprc_open);
/**
* dprc_close ( ) - Close the control session of the object
* @ 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
*
* After this function is called , no further operations are
* allowed on the object without opening a new control session .
*
* Return : ' 0 ' on Success ; Error code otherwise .
*/
int dprc_close(struct fsl_mc_io *mc_io,
u32 cmd_flags,
u16 token)
{
struct fsl_mc_command cmd = { 0 };
/* prepare command */
cmd.header = mc_encode_cmd_header(DPRC_CMDID_CLOSE, cmd_flags,
token);
/* send command to mc*/
return mc_send_command(mc_io, &cmd);
}
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_ '
* @ token : Token of DPRC object
* @ irq_index : Identifies the interrupt index to configure
* @ irq_cfg : IRQ configuration
*
* Return : ' 0 ' on Success ; Error code otherwise .
*/
int dprc_set_irq(struct fsl_mc_io *mc_io,
u32 cmd_flags,
u16 token,
u8 irq_index,
struct dprc_irq_cfg *irq_cfg)
{
struct fsl_mc_command cmd = { 0 };
struct dprc_cmd_set_irq *cmd_params;
/* prepare command */
cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_IRQ,
cmd_flags,
token);
cmd_params = (struct dprc_cmd_set_irq *)cmd.params;
cmd_params->irq_val = cpu_to_le32(irq_cfg->val);
cmd_params->irq_index = irq_index;
cmd_params->irq_addr = cpu_to_le64(irq_cfg->paddr);
cmd_params->irq_num = cpu_to_le32(irq_cfg->irq_num);
/* send command to mc*/
return mc_send_command(mc_io, &cmd);
}
/**
* dprc_set_irq_enable ( ) - Set overall interrupt state .
* @ 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
* @ irq_index : The interrupt index to configure
* @ en : Interrupt state - enable = 1 , disable = 0
*
* Allows GPP software to control when interrupts are generated .
* Each interrupt can have up to 32 causes . The enable / disable control ' s the
* overall interrupt state . if the interrupt is disabled no causes will cause
* an interrupt .
*
* Return : ' 0 ' on Success ; Error code otherwise .
*/
int dprc_set_irq_enable(struct fsl_mc_io *mc_io,
u32 cmd_flags,
u16 token,
u8 irq_index,
u8 en)
{
struct fsl_mc_command cmd = { 0 };
struct dprc_cmd_set_irq_enable *cmd_params;
/* prepare command */
cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_IRQ_ENABLE,
cmd_flags, token);
cmd_params = (struct dprc_cmd_set_irq_enable *)cmd.params;
cmd_params->enable = en & DPRC_ENABLE;
cmd_params->irq_index = irq_index;
/* send command to mc*/
return mc_send_command(mc_io, &cmd);
}
/**
* dprc_set_irq_mask ( ) - Set interrupt mask .
* @ 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
* @ irq_index : The interrupt index to configure
* @ mask : event mask to trigger interrupt ;
* each bit :
* 0 = ignore event
* 1 = consider event for asserting irq
*
* Every interrupt can have up to 32 causes and the interrupt model supports
* masking / unmasking each cause independently
*
* Return : ' 0 ' on Success ; Error code otherwise .
*/
int dprc_set_irq_mask(struct fsl_mc_io *mc_io,
u32 cmd_flags,
u16 token,
u8 irq_index,
u32 mask)
{
struct fsl_mc_command cmd = { 0 };
struct dprc_cmd_set_irq_mask *cmd_params;
/* prepare command */
cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_IRQ_MASK,
cmd_flags, token);
cmd_params = (struct dprc_cmd_set_irq_mask *)cmd.params;
cmd_params->mask = cpu_to_le32(mask);
cmd_params->irq_index = irq_index;
/* send command to mc*/
return mc_send_command(mc_io, &cmd);
}
/**
* dprc_get_irq_status ( ) - Get the current status of any pending interrupts .
* @ 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
* @ irq_index : The interrupt index to configure
* @ status : Returned interrupts status - one bit per cause :
* 0 = no interrupt pending
* 1 = interrupt pending
*
* Return : ' 0 ' on Success ; Error code otherwise .
*/
int dprc_get_irq_status(struct fsl_mc_io *mc_io,
u32 cmd_flags,
u16 token,
u8 irq_index,
u32 *status)
{
struct fsl_mc_command cmd = { 0 };
struct dprc_cmd_get_irq_status *cmd_params;
struct dprc_rsp_get_irq_status *rsp_params;
int err;
/* prepare command */
cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_IRQ_STATUS,
cmd_flags, token);
cmd_params = (struct dprc_cmd_get_irq_status *)cmd.params;
cmd_params->status = cpu_to_le32(*status);
cmd_params->irq_index = irq_index;
/* send command to mc*/
err = mc_send_command(mc_io, &cmd);
if (err)
return err;
/* retrieve response parameters */
rsp_params = (struct dprc_rsp_get_irq_status *)cmd.params;
*status = le32_to_cpu(rsp_params->status);
return 0 ;
}
/**
* dprc_clear_irq_status ( ) - Clear a pending interrupt ' s status
* @ 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
* @ irq_index : The interrupt index to configure
* @ status : bits to clear ( W1C ) - one bit per cause :
* 0 = don ' t change
* 1 = clear status bit
*
* Return : ' 0 ' on Success ; Error code otherwise .
*/
int dprc_clear_irq_status(struct fsl_mc_io *mc_io,
u32 cmd_flags,
u16 token,
u8 irq_index,
u32 status)
{
struct fsl_mc_command cmd = { 0 };
struct dprc_cmd_clear_irq_status *cmd_params;
/* prepare command */
cmd.header = mc_encode_cmd_header(DPRC_CMDID_CLEAR_IRQ_STATUS,
cmd_flags, token);
cmd_params = (struct dprc_cmd_clear_irq_status *)cmd.params;
cmd_params->status = cpu_to_le32(status);
cmd_params->irq_index = irq_index;
/* send command to mc*/
return mc_send_command(mc_io, &cmd);
}
/**
* dprc_get_attributes ( ) - Obtains container attributes
* @ 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
* @ attr : Returned container attributes
*
* Return : ' 0 ' on Success ; Error code otherwise .
*/
int dprc_get_attributes(struct fsl_mc_io *mc_io,
u32 cmd_flags,
u16 token,
struct dprc_attributes *attr)
{
struct fsl_mc_command cmd = { 0 };
struct dprc_rsp_get_attributes *rsp_params;
int err;
/* prepare command */
cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_ATTR,
cmd_flags,
token);
/* send command to mc*/
err = mc_send_command(mc_io, &cmd);
if (err)
return err;
/* retrieve response parameters */
rsp_params = (struct dprc_rsp_get_attributes *)cmd.params;
attr->container_id = le32_to_cpu(rsp_params->container_id);
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);
return 0 ;
}
/**
* dprc_get_obj_count ( ) - Obtains the number of objects in the DPRC
* @ 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
* @ obj_count : Number of objects assigned to the DPRC
*
* Return : ' 0 ' on Success ; Error code otherwise .
*/
int dprc_get_obj_count(struct fsl_mc_io *mc_io,
u32 cmd_flags,
u16 token,
int *obj_count)
{
struct fsl_mc_command cmd = { 0 };
struct dprc_rsp_get_obj_count *rsp_params;
int err;
/* prepare command */
cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_COUNT,
cmd_flags, token);
/* send command to mc*/
err = mc_send_command(mc_io, &cmd);
if (err)
return err;
/* retrieve response parameters */
rsp_params = (struct dprc_rsp_get_obj_count *)cmd.params;
*obj_count = le32_to_cpu(rsp_params->obj_count);
return 0 ;
}
EXPORT_SYMBOL_GPL(dprc_get_obj_count);
/**
* dprc_get_obj ( ) - Get general information on an object
* @ 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
* @ obj_index : Index of the object to be queried ( < obj_count )
* @ obj_desc : Returns the requested object descriptor
*
* The object descriptors are retrieved one by one by incrementing
* obj_index up to ( not including ) the value of obj_count returned
* from dprc_get_obj_count ( ) . dprc_get_obj_count ( ) must
* be called prior to dprc_get_obj ( ) .
*
* Return : ' 0 ' on Success ; Error code otherwise .
*/
int dprc_get_obj(struct fsl_mc_io *mc_io,
u32 cmd_flags,
u16 token,
int obj_index,
struct fsl_mc_obj_desc *obj_desc)
{
struct fsl_mc_command cmd = { 0 };
struct dprc_cmd_get_obj *cmd_params;
struct dprc_rsp_get_obj *rsp_params;
int err;
/* prepare command */
cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_OBJ,
cmd_flags,
token);
cmd_params = (struct dprc_cmd_get_obj *)cmd.params;
cmd_params->obj_index = cpu_to_le32(obj_index);
/* send command to mc*/
err = mc_send_command(mc_io, &cmd);
if (err)
return err;
/* retrieve response parameters */
rsp_params = (struct dprc_rsp_get_obj *)cmd.params;
obj_desc->id = le32_to_cpu(rsp_params->id);
obj_desc->vendor = le16_to_cpu(rsp_params->vendor);
obj_desc->irq_count = rsp_params->irq_count;
obj_desc->region_count = rsp_params->region_count;
obj_desc->state = le32_to_cpu(rsp_params->state);
obj_desc->ver_major = le16_to_cpu(rsp_params->version_major);
obj_desc->ver_minor = le16_to_cpu(rsp_params->version_minor);
obj_desc->flags = le16_to_cpu(rsp_params->flags);
strscpy_pad(obj_desc->type, rsp_params->type, 16 );
strscpy_pad(obj_desc->label, rsp_params->label, 16 );
return 0 ;
}
EXPORT_SYMBOL_GPL(dprc_get_obj);
/**
* dprc_set_obj_irq ( ) - Set IRQ information for object 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_ '
* @ token : Token of DPRC object
* @ obj_type : Type of the object to set its IRQ
* @ obj_id : ID of the object to set its IRQ
* @ irq_index : The interrupt index to configure
* @ irq_cfg : IRQ configuration
*
* Return : ' 0 ' on Success ; Error code otherwise .
*/
int dprc_set_obj_irq(struct fsl_mc_io *mc_io,
u32 cmd_flags,
u16 token,
char *obj_type,
int obj_id,
u8 irq_index,
struct dprc_irq_cfg *irq_cfg)
{
struct fsl_mc_command cmd = { 0 };
struct dprc_cmd_set_obj_irq *cmd_params;
/* prepare command */
cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_OBJ_IRQ,
cmd_flags,
token);
cmd_params = (struct dprc_cmd_set_obj_irq *)cmd.params;
cmd_params->irq_val = cpu_to_le32(irq_cfg->val);
cmd_params->irq_index = irq_index;
cmd_params->irq_addr = cpu_to_le64(irq_cfg->paddr);
cmd_params->irq_num = cpu_to_le32(irq_cfg->irq_num);
cmd_params->obj_id = cpu_to_le32(obj_id);
strscpy(cmd_params->obj_type, obj_type);
/* send command to mc*/
return mc_send_command(mc_io, &cmd);
}
EXPORT_SYMBOL_GPL(dprc_set_obj_irq);
/**
* dprc_get_obj_region ( ) - Get region information for a specified object .
* @ 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
* @ obj_type : Object type as returned in dprc_get_obj ( )
* @ obj_id : Unique object instance as returned in dprc_get_obj ( )
* @ region_index : The specific region to query
* @ region_desc : Returns the requested region descriptor
*
* Return : ' 0 ' on Success ; Error code otherwise .
*/
int dprc_get_obj_region(struct fsl_mc_io *mc_io,
u32 cmd_flags,
u16 token,
char *obj_type,
int obj_id,
u8 region_index,
struct dprc_region_desc *region_desc)
{
struct fsl_mc_command cmd = { 0 };
struct dprc_cmd_get_obj_region *cmd_params;
struct dprc_rsp_get_obj_region *rsp_params;
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;
}
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 64 K ( as implemented by hardware ) . If older API is in use the
* size reported is less ( 64 bytes for mc portals and 4 K 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);
cmd_params->region_index = region_index;
strscpy(cmd_params->obj_type, obj_type);
/* send command to mc*/
err = mc_send_command(mc_io, &cmd);
if (err)
return err;
/* retrieve response parameters */
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);
region_desc->type = rsp_params->type;
region_desc->flags = le32_to_cpu(rsp_params->flags);
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 ;
return 0 ;
}
EXPORT_SYMBOL_GPL(dprc_get_obj_region);
/**
* dprc_get_api_version - Get Data Path Resource Container API version
* @ mc_io : Pointer to Mc portal ' s I / O object
* @ cmd_flags : Command flags ; one or more of ' MC_CMD_FLAG_ '
* @ major_ver : Major version of Data Path Resource Container API
* @ minor_ver : Minor version of Data Path Resource Container API
*
* Return : ' 0 ' on Success ; Error code otherwise .
*/
int dprc_get_api_version(struct fsl_mc_io *mc_io,
u32 cmd_flags,
u16 *major_ver,
u16 *minor_ver)
{
struct fsl_mc_command cmd = { 0 };
int err;
/* prepare command */
cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_API_VERSION,
cmd_flags, 0 );
/* send command to mc */
err = mc_send_command(mc_io, &cmd);
if (err)
return err;
/* retrieve response parameters */
mc_cmd_read_api_version(&cmd, major_ver, minor_ver);
return 0 ;
}
/**
* dprc_get_container_id - Get container ID associated with a given portal .
* @ mc_io : Pointer to Mc portal ' s I / O object
* @ cmd_flags : Command flags ; one or more of ' MC_CMD_FLAG_ '
* @ container_id : Requested container id
*
* Return : ' 0 ' on Success ; Error code otherwise .
*/
int dprc_get_container_id(struct fsl_mc_io *mc_io,
u32 cmd_flags,
int *container_id)
{
struct fsl_mc_command cmd = { 0 };
int err;
/* prepare command */
cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_CONT_ID,
cmd_flags,
0 );
/* send command to mc*/
err = mc_send_command(mc_io, &cmd);
if (err)
return err;
/* retrieve response parameters */
*container_id = (int )mc_cmd_read_object_id(&cmd);
return 0 ;
}
/**
* dprc_get_connection ( ) - Get connected endpoint and link status if connection
* exists .
* @ 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
* @ endpoint1 : Endpoint 1 configuration parameters
* @ endpoint2 : Returned endpoint 2 configuration parameters
* @ state : Returned link state :
* 1 - link is up ;
* 0 - link is down ;
* - 1 - no connection ( endpoint2 information is irrelevant )
*
* Return : ' 0 ' on Success ; - ENOTCONN if connection does not exist .
*/
int dprc_get_connection(struct fsl_mc_io *mc_io,
u32 cmd_flags,
u16 token,
const struct dprc_endpoint *endpoint1,
struct dprc_endpoint *endpoint2,
int *state)
{
struct dprc_cmd_get_connection *cmd_params;
struct dprc_rsp_get_connection *rsp_params;
struct fsl_mc_command cmd = { 0 };
int err, i;
/* prepare command */
cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_CONNECTION,
cmd_flags,
token);
cmd_params = (struct dprc_cmd_get_connection *)cmd.params;
cmd_params->ep1_id = cpu_to_le32(endpoint1->id);
cmd_params->ep1_interface_id = cpu_to_le16(endpoint1->if_id);
for (i = 0 ; i < 16 ; i++)
cmd_params->ep1_type[i] = endpoint1->type[i];
/* send command to mc */
err = mc_send_command(mc_io, &cmd);
if (err)
return -ENOTCONN;
/* retrieve response parameters */
rsp_params = (struct dprc_rsp_get_connection *)cmd.params;
endpoint2->id = le32_to_cpu(rsp_params->ep2_id);
endpoint2->if_id = le16_to_cpu(rsp_params->ep2_interface_id);
*state = le32_to_cpu(rsp_params->state);
for (i = 0 ; i < 16 ; i++)
endpoint2->type[i] = rsp_params->ep2_type[i];
return 0 ;
}
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