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linux_dsm_epyc7002/drivers/bus/fsl-mc/dprc.c
Roy Pledge dde2137d62 bus: mc-bus: Add support for mapping shareable portals 
Starting with v5 of NXP QBMan devices the hardware supports using
regular cacheable/shareable memory as the backing store for the
portals.

This patch adds support for the new portal mode by switching to
use the DPRC get object region v2 command which returns both
a base address and offset for the portal memory. The new portal
region is identified as shareable through the addition of a new
flag.

Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
Reviewed-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Signed-off-by: Li Yang <leoyang.li@nxp.com>
2019-05-20 14:28:16 -05:00

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// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
/*
* Copyright 2013-2016 Freescale Semiconductor Inc.
*
*/
#include <linux/kernel.h>
#include <linux/fsl/mc.h>
#include "fsl-mc-private.h"
/**
* 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_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
* @attributes 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 = le16_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);
strncpy(obj_desc->type, rsp_params->type, 16);
obj_desc->type[15] = '\0';
strncpy(obj_desc->label, rsp_params->label, 16);
obj_desc->label[15] = '\0';
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);
strncpy(cmd_params->obj_type, obj_type, 16);
cmd_params->obj_type[15] = '\0';
/* 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;
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);
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;
strncpy(cmd_params->obj_type, obj_type, 16);
cmd_params->obj_type[15] = '\0';
/* 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);
if (major_ver > 6 || (major_ver == 6 && 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;
}
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