557 lines
16 KiB
C
557 lines
16 KiB
C
// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
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/*
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* Copyright 2013-2016 Freescale Semiconductor Inc.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/fsl/mc.h>
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#include "fsl-mc-private.h"
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/**
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* dprc_open() - Open DPRC object for use
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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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* @container_id: Container ID to open
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* @token: Returned token of DPRC object
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*
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* Return: '0' on Success; Error code otherwise.
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*
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* @warning Required before any operation on the object.
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*/
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int dprc_open(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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int container_id,
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u16 *token)
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{
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struct fsl_mc_command cmd = { 0 };
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struct dprc_cmd_open *cmd_params;
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int err;
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/* prepare command */
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cmd.header = mc_encode_cmd_header(DPRC_CMDID_OPEN, cmd_flags,
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0);
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cmd_params = (struct dprc_cmd_open *)cmd.params;
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cmd_params->container_id = cpu_to_le32(container_id);
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/* send command to mc*/
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err = mc_send_command(mc_io, &cmd);
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if (err)
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return err;
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/* retrieve response parameters */
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*token = mc_cmd_hdr_read_token(&cmd);
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return 0;
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}
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EXPORT_SYMBOL_GPL(dprc_open);
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/**
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* dprc_close() - Close the control session of the object
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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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*
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* After this function is called, no further operations are
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* allowed on the object without opening a new control session.
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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_close(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token)
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{
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struct fsl_mc_command cmd = { 0 };
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/* prepare command */
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cmd.header = mc_encode_cmd_header(DPRC_CMDID_CLOSE, cmd_flags,
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token);
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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_close);
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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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* @token: Token of DPRC object
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* @irq_index: Identifies the interrupt index to configure
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* @irq_cfg: IRQ configuration
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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_set_irq(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token,
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u8 irq_index,
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struct dprc_irq_cfg *irq_cfg)
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{
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struct fsl_mc_command cmd = { 0 };
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struct dprc_cmd_set_irq *cmd_params;
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/* prepare command */
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cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_IRQ,
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cmd_flags,
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token);
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cmd_params = (struct dprc_cmd_set_irq *)cmd.params;
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cmd_params->irq_val = cpu_to_le32(irq_cfg->val);
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cmd_params->irq_index = irq_index;
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cmd_params->irq_addr = cpu_to_le64(irq_cfg->paddr);
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cmd_params->irq_num = cpu_to_le32(irq_cfg->irq_num);
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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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/**
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* dprc_set_irq_enable() - Set overall interrupt state.
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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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* @irq_index: The interrupt index to configure
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* @en: Interrupt state - enable = 1, disable = 0
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*
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* Allows GPP software to control when interrupts are generated.
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* Each interrupt can have up to 32 causes. The enable/disable control's the
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* overall interrupt state. if the interrupt is disabled no causes will cause
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* an interrupt.
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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_set_irq_enable(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token,
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u8 irq_index,
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u8 en)
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{
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struct fsl_mc_command cmd = { 0 };
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struct dprc_cmd_set_irq_enable *cmd_params;
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/* prepare command */
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cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_IRQ_ENABLE,
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cmd_flags, token);
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cmd_params = (struct dprc_cmd_set_irq_enable *)cmd.params;
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cmd_params->enable = en & DPRC_ENABLE;
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cmd_params->irq_index = irq_index;
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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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/**
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* dprc_set_irq_mask() - Set interrupt mask.
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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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* @irq_index: The interrupt index to configure
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* @mask: event mask to trigger interrupt;
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* each bit:
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* 0 = ignore event
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* 1 = consider event for asserting irq
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*
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* Every interrupt can have up to 32 causes and the interrupt model supports
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* masking/unmasking each cause independently
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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_set_irq_mask(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token,
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u8 irq_index,
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u32 mask)
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{
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struct fsl_mc_command cmd = { 0 };
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struct dprc_cmd_set_irq_mask *cmd_params;
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/* prepare command */
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cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_IRQ_MASK,
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cmd_flags, token);
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cmd_params = (struct dprc_cmd_set_irq_mask *)cmd.params;
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cmd_params->mask = cpu_to_le32(mask);
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cmd_params->irq_index = irq_index;
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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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/**
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* dprc_get_irq_status() - Get the current status of any pending interrupts.
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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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* @irq_index: The interrupt index to configure
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* @status: Returned interrupts status - one bit per cause:
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* 0 = no interrupt pending
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* 1 = interrupt pending
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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_get_irq_status(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token,
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u8 irq_index,
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u32 *status)
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{
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struct fsl_mc_command cmd = { 0 };
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struct dprc_cmd_get_irq_status *cmd_params;
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struct dprc_rsp_get_irq_status *rsp_params;
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int err;
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/* prepare command */
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cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_IRQ_STATUS,
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cmd_flags, token);
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cmd_params = (struct dprc_cmd_get_irq_status *)cmd.params;
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cmd_params->status = cpu_to_le32(*status);
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cmd_params->irq_index = irq_index;
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/* send command to mc*/
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err = mc_send_command(mc_io, &cmd);
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if (err)
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return err;
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/* retrieve response parameters */
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rsp_params = (struct dprc_rsp_get_irq_status *)cmd.params;
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*status = le32_to_cpu(rsp_params->status);
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return 0;
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}
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/**
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* dprc_clear_irq_status() - Clear a pending interrupt's status
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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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* @irq_index: The interrupt index to configure
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* @status: bits to clear (W1C) - one bit per cause:
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* 0 = don't change
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* 1 = clear status bit
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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_clear_irq_status(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token,
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u8 irq_index,
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u32 status)
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{
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struct fsl_mc_command cmd = { 0 };
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struct dprc_cmd_clear_irq_status *cmd_params;
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/* prepare command */
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cmd.header = mc_encode_cmd_header(DPRC_CMDID_CLEAR_IRQ_STATUS,
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cmd_flags, token);
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cmd_params = (struct dprc_cmd_clear_irq_status *)cmd.params;
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cmd_params->status = cpu_to_le32(status);
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cmd_params->irq_index = irq_index;
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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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/**
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* dprc_get_attributes() - Obtains container attributes
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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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* @attributes Returned container attributes
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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_get_attributes(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token,
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struct dprc_attributes *attr)
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{
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struct fsl_mc_command cmd = { 0 };
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struct dprc_rsp_get_attributes *rsp_params;
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int err;
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/* prepare command */
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cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_ATTR,
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cmd_flags,
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token);
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/* send command to mc*/
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err = mc_send_command(mc_io, &cmd);
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if (err)
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return err;
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/* retrieve response parameters */
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rsp_params = (struct dprc_rsp_get_attributes *)cmd.params;
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attr->container_id = le32_to_cpu(rsp_params->container_id);
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attr->icid = le16_to_cpu(rsp_params->icid);
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attr->options = le32_to_cpu(rsp_params->options);
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attr->portal_id = le32_to_cpu(rsp_params->portal_id);
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return 0;
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}
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/**
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* dprc_get_obj_count() - Obtains the number of objects in the DPRC
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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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* @obj_count: Number of objects assigned to the DPRC
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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_get_obj_count(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token,
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int *obj_count)
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{
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struct fsl_mc_command cmd = { 0 };
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struct dprc_rsp_get_obj_count *rsp_params;
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int err;
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/* prepare command */
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cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_COUNT,
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cmd_flags, token);
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/* send command to mc*/
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err = mc_send_command(mc_io, &cmd);
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if (err)
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return err;
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/* retrieve response parameters */
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rsp_params = (struct dprc_rsp_get_obj_count *)cmd.params;
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*obj_count = le32_to_cpu(rsp_params->obj_count);
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return 0;
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}
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EXPORT_SYMBOL_GPL(dprc_get_obj_count);
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/**
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* dprc_get_obj() - Get general information on an object
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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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* @obj_index: Index of the object to be queried (< obj_count)
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* @obj_desc: Returns the requested object descriptor
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*
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* The object descriptors are retrieved one by one by incrementing
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* obj_index up to (not including) the value of obj_count returned
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* from dprc_get_obj_count(). dprc_get_obj_count() must
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* be called prior to dprc_get_obj().
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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_get_obj(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token,
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int obj_index,
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struct fsl_mc_obj_desc *obj_desc)
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{
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struct fsl_mc_command cmd = { 0 };
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struct dprc_cmd_get_obj *cmd_params;
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struct dprc_rsp_get_obj *rsp_params;
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int err;
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/* prepare command */
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cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_OBJ,
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cmd_flags,
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token);
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cmd_params = (struct dprc_cmd_get_obj *)cmd.params;
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cmd_params->obj_index = cpu_to_le32(obj_index);
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/* send command to mc*/
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err = mc_send_command(mc_io, &cmd);
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if (err)
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return err;
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/* retrieve response parameters */
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rsp_params = (struct dprc_rsp_get_obj *)cmd.params;
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obj_desc->id = le32_to_cpu(rsp_params->id);
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obj_desc->vendor = le16_to_cpu(rsp_params->vendor);
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obj_desc->irq_count = rsp_params->irq_count;
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obj_desc->region_count = rsp_params->region_count;
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obj_desc->state = le32_to_cpu(rsp_params->state);
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obj_desc->ver_major = le16_to_cpu(rsp_params->version_major);
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obj_desc->ver_minor = le16_to_cpu(rsp_params->version_minor);
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obj_desc->flags = le16_to_cpu(rsp_params->flags);
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strncpy(obj_desc->type, rsp_params->type, 16);
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obj_desc->type[15] = '\0';
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strncpy(obj_desc->label, rsp_params->label, 16);
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obj_desc->label[15] = '\0';
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return 0;
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}
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EXPORT_SYMBOL_GPL(dprc_get_obj);
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/**
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* dprc_set_obj_irq() - Set IRQ information for object 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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* @token: Token of DPRC object
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* @obj_type: Type of the object to set its IRQ
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* @obj_id: ID of the object to set its IRQ
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* @irq_index: The interrupt index to configure
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* @irq_cfg: IRQ configuration
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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_set_obj_irq(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token,
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char *obj_type,
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int obj_id,
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u8 irq_index,
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struct dprc_irq_cfg *irq_cfg)
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{
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struct fsl_mc_command cmd = { 0 };
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struct dprc_cmd_set_obj_irq *cmd_params;
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/* prepare command */
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cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_OBJ_IRQ,
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cmd_flags,
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token);
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cmd_params = (struct dprc_cmd_set_obj_irq *)cmd.params;
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cmd_params->irq_val = cpu_to_le32(irq_cfg->val);
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cmd_params->irq_index = irq_index;
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cmd_params->irq_addr = cpu_to_le64(irq_cfg->paddr);
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cmd_params->irq_num = cpu_to_le32(irq_cfg->irq_num);
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cmd_params->obj_id = cpu_to_le32(obj_id);
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strncpy(cmd_params->obj_type, obj_type, 16);
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cmd_params->obj_type[15] = '\0';
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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_set_obj_irq);
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/**
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* dprc_get_obj_region() - Get region information for a specified object.
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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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* @obj_type; Object type as returned in dprc_get_obj()
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* @obj_id: Unique object instance as returned in dprc_get_obj()
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* @region_index: The specific region to query
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* @region_desc: Returns the requested region descriptor
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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_get_obj_region(struct fsl_mc_io *mc_io,
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u32 cmd_flags,
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u16 token,
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char *obj_type,
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int obj_id,
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u8 region_index,
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struct dprc_region_desc *region_desc)
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{
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struct fsl_mc_command cmd = { 0 };
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struct dprc_cmd_get_obj_region *cmd_params;
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struct dprc_rsp_get_obj_region *rsp_params;
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u16 major_ver, minor_ver;
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int err;
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/* prepare command */
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err = dprc_get_api_version(mc_io, 0,
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&major_ver,
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&minor_ver);
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if (err)
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return err;
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/**
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* MC API version 6.3 introduced a new field to the region
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* descriptor: base_address. If the older API is in use then the base
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* address is set to zero to indicate it needs to be obtained elsewhere
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* (typically the device tree).
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*/
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if (major_ver > 6 || (major_ver == 6 && minor_ver >= 3))
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cmd.header =
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mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_REG_V2,
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cmd_flags, token);
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else
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cmd.header =
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mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_REG,
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cmd_flags, token);
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cmd_params = (struct dprc_cmd_get_obj_region *)cmd.params;
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|
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;
|
|
}
|