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704 lines
20 KiB
704 lines
20 KiB
// 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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* Copyright 2020 NXP |
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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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* cache the DPRC version to reduce the number of commands |
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* towards the mc firmware |
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*/ |
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static u16 dprc_major_ver; |
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static u16 dprc_minor_ver; |
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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_reset_container - Reset child container. |
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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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* @child_container_id: ID of the container to reset |
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* @options: 32 bit options: |
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* - 0 (no bits set) - all the objects inside the container are |
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* reset. The child containers are entered recursively and the |
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* objects reset. All the objects (including the child containers) |
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* are closed. |
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* - bit 0 set - all the objects inside the container are reset. |
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* However the child containers are not entered recursively. |
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* This option is supported for API versions >= 6.5 |
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* In case a software context crashes or becomes non-responsive, the parent |
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* may wish to reset its resources container before the software context is |
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* restarted. |
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* |
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* This routine informs all objects assigned to the child container that the |
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* container is being reset, so they may perform any cleanup operations that are |
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* needed. All objects handles that were owned by the child container shall be |
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* closed. |
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* |
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* Note that such request may be submitted even if the child software context |
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* has not crashed, but the resulting object cleanup operations will not be |
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* aware of that. |
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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_reset_container(struct fsl_mc_io *mc_io, |
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u32 cmd_flags, |
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u16 token, |
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int child_container_id, |
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u32 options) |
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{ |
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struct fsl_mc_command cmd = { 0 }; |
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struct dprc_cmd_reset_container *cmd_params; |
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u32 cmdid = DPRC_CMDID_RESET_CONT; |
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int err; |
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/* |
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* If the DPRC object version was not yet cached, cache it now. |
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* Otherwise use the already cached value. |
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*/ |
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if (!dprc_major_ver && !dprc_minor_ver) { |
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err = dprc_get_api_version(mc_io, 0, |
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&dprc_major_ver, |
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&dprc_minor_ver); |
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if (err) |
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return err; |
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} |
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/* |
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* MC API 6.5 introduced a new field in the command used to pass |
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* some flags. |
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* Bit 0 indicates that the child containers are not recursively reset. |
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*/ |
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if (dprc_major_ver > 6 || (dprc_major_ver == 6 && dprc_minor_ver >= 5)) |
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cmdid = DPRC_CMDID_RESET_CONT_V2; |
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/* prepare command */ |
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cmd.header = mc_encode_cmd_header(cmdid, cmd_flags, token); |
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cmd_params = (struct dprc_cmd_reset_container *)cmd.params; |
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cmd_params->child_container_id = cpu_to_le32(child_container_id); |
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cmd_params->options = cpu_to_le32(options); |
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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_reset_container); |
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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 = le32_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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/** |
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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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|
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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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/** |
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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; |
|
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 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); |
|
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); |
|
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; |
|
}
|
|
|