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Diffstat (limited to '')
| -rw-r--r-- | drivers/bus/fsl-mc/dprc.c | 532 |
1 files changed, 532 insertions, 0 deletions
diff --git a/drivers/bus/fsl-mc/dprc.c b/drivers/bus/fsl-mc/dprc.c new file mode 100644 index 000000000..1c3f62182 --- /dev/null +++ b/drivers/bus/fsl-mc/dprc.c @@ -0,0 +1,532 @@ +// 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; + int err; + + /* prepare command */ + 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_addr); + region_desc->size = le32_to_cpu(rsp_params->size); + + 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; +} |