diff options
Diffstat (limited to 'drivers/bus')
| -rw-r--r-- | drivers/bus/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/bus/Makefile | 4 | ||||
| -rw-r--r-- | drivers/bus/fsl-mc/Kconfig | 16 | ||||
| -rw-r--r-- | drivers/bus/fsl-mc/Makefile | 18 | ||||
| -rw-r--r-- | drivers/bus/fsl-mc/dpbp.c | 186 | ||||
| -rw-r--r-- | drivers/bus/fsl-mc/dpcon.c | 222 | ||||
| -rw-r--r-- | drivers/bus/fsl-mc/dpmcp.c | 99 | ||||
| -rw-r--r-- | drivers/bus/fsl-mc/dprc-driver.c | 809 | ||||
| -rw-r--r-- | drivers/bus/fsl-mc/dprc.c | 532 | ||||
| -rw-r--r-- | drivers/bus/fsl-mc/fsl-mc-allocator.c | 648 | ||||
| -rw-r--r-- | drivers/bus/fsl-mc/fsl-mc-bus.c | 948 | ||||
| -rw-r--r-- | drivers/bus/fsl-mc/fsl-mc-msi.c | 285 | ||||
| -rw-r--r-- | drivers/bus/fsl-mc/fsl-mc-private.h | 562 | ||||
| -rw-r--r-- | drivers/bus/fsl-mc/mc-io.c | 268 | ||||
| -rw-r--r-- | drivers/bus/fsl-mc/mc-sys.c | 296 |
15 files changed, 4895 insertions, 0 deletions
diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig index 57e011d36a79..769599bc1bab 100644 --- a/drivers/bus/Kconfig +++ b/drivers/bus/Kconfig @@ -199,4 +199,6 @@ config DA8XX_MSTPRI configuration. Allows to adjust the priorities of all master peripherals. +source "drivers/bus/fsl-mc/Kconfig" + endmenu diff --git a/drivers/bus/Makefile b/drivers/bus/Makefile index 9bcd0bf3954b..b666c49f249e 100644 --- a/drivers/bus/Makefile +++ b/drivers/bus/Makefile @@ -8,6 +8,10 @@ obj-$(CONFIG_ARM_CCI) += arm-cci.o obj-$(CONFIG_ARM_CCN) += arm-ccn.o obj-$(CONFIG_BRCMSTB_GISB_ARB) += brcmstb_gisb.o + +# DPAA2 fsl-mc bus +obj-$(CONFIG_FSL_MC_BUS) += fsl-mc/ + obj-$(CONFIG_IMX_WEIM) += imx-weim.o obj-$(CONFIG_MIPS_CDMM) += mips_cdmm.o obj-$(CONFIG_MVEBU_MBUS) += mvebu-mbus.o diff --git a/drivers/bus/fsl-mc/Kconfig b/drivers/bus/fsl-mc/Kconfig new file mode 100644 index 000000000000..c23c77c9b705 --- /dev/null +++ b/drivers/bus/fsl-mc/Kconfig @@ -0,0 +1,16 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# DPAA2 fsl-mc bus +# +# Copyright (C) 2014-2016 Freescale Semiconductor, Inc. +# + +config FSL_MC_BUS + bool "QorIQ DPAA2 fsl-mc bus driver" + depends on OF && (ARCH_LAYERSCAPE || (COMPILE_TEST && (ARM || ARM64 || X86_LOCAL_APIC || PPC))) + select GENERIC_MSI_IRQ_DOMAIN + help + Driver to enable the bus infrastructure for the QorIQ DPAA2 + architecture. The fsl-mc bus driver handles discovery of + DPAA2 objects (which are represented as Linux devices) and + binding objects to drivers. diff --git a/drivers/bus/fsl-mc/Makefile b/drivers/bus/fsl-mc/Makefile new file mode 100644 index 000000000000..3c518c7e8374 --- /dev/null +++ b/drivers/bus/fsl-mc/Makefile @@ -0,0 +1,18 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Freescale Management Complex (MC) bus drivers +# +# Copyright (C) 2014 Freescale Semiconductor, Inc. +# +obj-$(CONFIG_FSL_MC_BUS) += mc-bus-driver.o + +mc-bus-driver-objs := fsl-mc-bus.o \ + mc-sys.o \ + mc-io.o \ + dpbp.o \ + dpcon.o \ + dprc.o \ + dprc-driver.o \ + fsl-mc-allocator.o \ + fsl-mc-msi.o \ + dpmcp.o diff --git a/drivers/bus/fsl-mc/dpbp.c b/drivers/bus/fsl-mc/dpbp.c new file mode 100644 index 000000000000..0aeacc5bf461 --- /dev/null +++ b/drivers/bus/fsl-mc/dpbp.c @@ -0,0 +1,186 @@ +// 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 <linux/fsl/mc.h> + +#include "fsl-mc-private.h" + +/** + * dpbp_open() - Open a control session for the specified object. + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @dpbp_id: DPBP unique ID + * @token: Returned token; use in subsequent API calls + * + * This function can be used to open a control session for an + * already created object; an object may have been declared in + * the DPL or by calling the dpbp_create function. + * This function returns a unique authentication token, + * associated with the specific object ID and the specific MC + * portal; this token must be used in all subsequent commands for + * this specific object + * + * Return: '0' on Success; Error code otherwise. + */ +int dpbp_open(struct fsl_mc_io *mc_io, + u32 cmd_flags, + int dpbp_id, + u16 *token) +{ + struct mc_command cmd = { 0 }; + struct dpbp_cmd_open *cmd_params; + int err; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPBP_CMDID_OPEN, + cmd_flags, 0); + cmd_params = (struct dpbp_cmd_open *)cmd.params; + cmd_params->dpbp_id = cpu_to_le32(dpbp_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 err; +} +EXPORT_SYMBOL_GPL(dpbp_open); + +/** + * dpbp_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 DPBP 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 dpbp_close(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token) +{ + struct mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPBP_CMDID_CLOSE, cmd_flags, + token); + + /* send command to mc*/ + return mc_send_command(mc_io, &cmd); +} +EXPORT_SYMBOL_GPL(dpbp_close); + +/** + * dpbp_enable() - Enable the DPBP. + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @token: Token of DPBP object + * + * Return: '0' on Success; Error code otherwise. + */ +int dpbp_enable(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token) +{ + struct mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPBP_CMDID_ENABLE, cmd_flags, + token); + + /* send command to mc*/ + return mc_send_command(mc_io, &cmd); +} +EXPORT_SYMBOL_GPL(dpbp_enable); + +/** + * dpbp_disable() - Disable the DPBP. + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @token: Token of DPBP object + * + * Return: '0' on Success; Error code otherwise. + */ +int dpbp_disable(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token) +{ + struct mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPBP_CMDID_DISABLE, + cmd_flags, token); + + /* send command to mc*/ + return mc_send_command(mc_io, &cmd); +} +EXPORT_SYMBOL_GPL(dpbp_disable); + +/** + * dpbp_reset() - Reset the DPBP, returns the object to initial 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 DPBP object + * + * Return: '0' on Success; Error code otherwise. + */ +int dpbp_reset(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token) +{ + struct mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPBP_CMDID_RESET, + cmd_flags, token); + + /* send command to mc*/ + return mc_send_command(mc_io, &cmd); +} +EXPORT_SYMBOL_GPL(dpbp_reset); + +/** + * dpbp_get_attributes - Retrieve DPBP 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 DPBP object + * @attr: Returned object's attributes + * + * Return: '0' on Success; Error code otherwise. + */ +int dpbp_get_attributes(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token, + struct dpbp_attr *attr) +{ + struct mc_command cmd = { 0 }; + struct dpbp_rsp_get_attributes *rsp_params; + int err; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPBP_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 dpbp_rsp_get_attributes *)cmd.params; + attr->bpid = le16_to_cpu(rsp_params->bpid); + attr->id = le32_to_cpu(rsp_params->id); + + return 0; +} +EXPORT_SYMBOL_GPL(dpbp_get_attributes); diff --git a/drivers/bus/fsl-mc/dpcon.c b/drivers/bus/fsl-mc/dpcon.c new file mode 100644 index 000000000000..a1ba819449d5 --- /dev/null +++ b/drivers/bus/fsl-mc/dpcon.c @@ -0,0 +1,222 @@ +// 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 <linux/fsl/mc.h> + +#include "fsl-mc-private.h" + +/** + * dpcon_open() - Open a control session for the specified object + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @dpcon_id: DPCON unique ID + * @token: Returned token; use in subsequent API calls + * + * This function can be used to open a control session for an + * already created object; an object may have been declared in + * the DPL or by calling the dpcon_create() function. + * This function returns a unique authentication token, + * associated with the specific object ID and the specific MC + * portal; this token must be used in all subsequent commands for + * this specific object. + * + * Return: '0' on Success; Error code otherwise. + */ +int dpcon_open(struct fsl_mc_io *mc_io, + u32 cmd_flags, + int dpcon_id, + u16 *token) +{ + struct mc_command cmd = { 0 }; + struct dpcon_cmd_open *dpcon_cmd; + int err; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPCON_CMDID_OPEN, + cmd_flags, + 0); + dpcon_cmd = (struct dpcon_cmd_open *)cmd.params; + dpcon_cmd->dpcon_id = cpu_to_le32(dpcon_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(dpcon_open); + +/** + * dpcon_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 DPCON 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 dpcon_close(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token) +{ + struct mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPCON_CMDID_CLOSE, + cmd_flags, + token); + + /* send command to mc*/ + return mc_send_command(mc_io, &cmd); +} +EXPORT_SYMBOL_GPL(dpcon_close); + +/** + * dpcon_enable() - Enable the DPCON + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @token: Token of DPCON object + * + * Return: '0' on Success; Error code otherwise + */ +int dpcon_enable(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token) +{ + struct mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPCON_CMDID_ENABLE, + cmd_flags, + token); + + /* send command to mc*/ + return mc_send_command(mc_io, &cmd); +} +EXPORT_SYMBOL_GPL(dpcon_enable); + +/** + * dpcon_disable() - Disable the DPCON + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @token: Token of DPCON object + * + * Return: '0' on Success; Error code otherwise + */ +int dpcon_disable(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token) +{ + struct mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPCON_CMDID_DISABLE, + cmd_flags, + token); + + /* send command to mc*/ + return mc_send_command(mc_io, &cmd); +} +EXPORT_SYMBOL_GPL(dpcon_disable); + +/** + * dpcon_reset() - Reset the DPCON, returns the object to initial 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 DPCON object + * + * Return: '0' on Success; Error code otherwise. + */ +int dpcon_reset(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token) +{ + struct mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPCON_CMDID_RESET, + cmd_flags, token); + + /* send command to mc*/ + return mc_send_command(mc_io, &cmd); +} +EXPORT_SYMBOL_GPL(dpcon_reset); + +/** + * dpcon_get_attributes() - Retrieve DPCON 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 DPCON object + * @attr: Object's attributes + * + * Return: '0' on Success; Error code otherwise. + */ +int dpcon_get_attributes(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token, + struct dpcon_attr *attr) +{ + struct mc_command cmd = { 0 }; + struct dpcon_rsp_get_attr *dpcon_rsp; + int err; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPCON_CMDID_GET_ATTR, + cmd_flags, + token); + + /* send command to mc*/ + err = mc_send_command(mc_io, &cmd); + if (err) + return err; + + /* retrieve response parameters */ + dpcon_rsp = (struct dpcon_rsp_get_attr *)cmd.params; + attr->id = le32_to_cpu(dpcon_rsp->id); + attr->qbman_ch_id = le16_to_cpu(dpcon_rsp->qbman_ch_id); + attr->num_priorities = dpcon_rsp->num_priorities; + + return 0; +} +EXPORT_SYMBOL_GPL(dpcon_get_attributes); + +/** + * dpcon_set_notification() - Set DPCON notification destination + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @token: Token of DPCON object + * @cfg: Notification parameters + * + * Return: '0' on Success; Error code otherwise + */ +int dpcon_set_notification(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token, + struct dpcon_notification_cfg *cfg) +{ + struct mc_command cmd = { 0 }; + struct dpcon_cmd_set_notification *dpcon_cmd; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPCON_CMDID_SET_NOTIFICATION, + cmd_flags, + token); + dpcon_cmd = (struct dpcon_cmd_set_notification *)cmd.params; + dpcon_cmd->dpio_id = cpu_to_le32(cfg->dpio_id); + dpcon_cmd->priority = cfg->priority; + dpcon_cmd->user_ctx = cpu_to_le64(cfg->user_ctx); + + /* send command to mc*/ + return mc_send_command(mc_io, &cmd); +} +EXPORT_SYMBOL_GPL(dpcon_set_notification); diff --git a/drivers/bus/fsl-mc/dpmcp.c b/drivers/bus/fsl-mc/dpmcp.c new file mode 100644 index 000000000000..8d997b0f6ba3 --- /dev/null +++ b/drivers/bus/fsl-mc/dpmcp.c @@ -0,0 +1,99 @@ +// 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" + +/** + * dpmcp_open() - Open a control session for the specified object. + * @mc_io: Pointer to MC portal's I/O object + * @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_' + * @dpmcp_id: DPMCP unique ID + * @token: Returned token; use in subsequent API calls + * + * This function can be used to open a control session for an + * already created object; an object may have been declared in + * the DPL or by calling the dpmcp_create function. + * This function returns a unique authentication token, + * associated with the specific object ID and the specific MC + * portal; this token must be used in all subsequent commands for + * this specific object + * + * Return: '0' on Success; Error code otherwise. + */ +int dpmcp_open(struct fsl_mc_io *mc_io, + u32 cmd_flags, + int dpmcp_id, + u16 *token) +{ + struct mc_command cmd = { 0 }; + struct dpmcp_cmd_open *cmd_params; + int err; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPMCP_CMDID_OPEN, + cmd_flags, 0); + cmd_params = (struct dpmcp_cmd_open *)cmd.params; + cmd_params->dpmcp_id = cpu_to_le32(dpmcp_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 err; +} + +/** + * dpmcp_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 DPMCP 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 dpmcp_close(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token) +{ + struct mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPMCP_CMDID_CLOSE, + cmd_flags, token); + + /* send command to mc*/ + return mc_send_command(mc_io, &cmd); +} + +/** + * dpmcp_reset() - Reset the DPMCP, returns the object to initial 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 DPMCP object + * + * Return: '0' on Success; Error code otherwise. + */ +int dpmcp_reset(struct fsl_mc_io *mc_io, + u32 cmd_flags, + u16 token) +{ + struct mc_command cmd = { 0 }; + + /* prepare command */ + cmd.header = mc_encode_cmd_header(DPMCP_CMDID_RESET, + cmd_flags, token); + + /* send command to mc*/ + return mc_send_command(mc_io, &cmd); +} diff --git a/drivers/bus/fsl-mc/dprc-driver.c b/drivers/bus/fsl-mc/dprc-driver.c new file mode 100644 index 000000000000..52c7e15143d6 --- /dev/null +++ b/drivers/bus/fsl-mc/dprc-driver.c @@ -0,0 +1,809 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Freescale data path resource container (DPRC) driver + * + * Copyright (C) 2014-2016 Freescale Semiconductor, Inc. + * Author: German Rivera <German.Rivera@freescale.com> + * + */ + +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/msi.h> +#include <linux/fsl/mc.h> + +#include "fsl-mc-private.h" + +#define FSL_MC_DPRC_DRIVER_NAME "fsl_mc_dprc" + +struct fsl_mc_child_objs { + int child_count; + struct fsl_mc_obj_desc *child_array; +}; + +static bool fsl_mc_device_match(struct fsl_mc_device *mc_dev, + struct fsl_mc_obj_desc *obj_desc) +{ + return mc_dev->obj_desc.id == obj_desc->id && + strcmp(mc_dev->obj_desc.type, obj_desc->type) == 0; + +} + +static int __fsl_mc_device_remove_if_not_in_mc(struct device *dev, void *data) +{ + int i; + struct fsl_mc_child_objs *objs; + struct fsl_mc_device *mc_dev; + + mc_dev = to_fsl_mc_device(dev); + objs = data; + + for (i = 0; i < objs->child_count; i++) { + struct fsl_mc_obj_desc *obj_desc = &objs->child_array[i]; + + if (strlen(obj_desc->type) != 0 && + fsl_mc_device_match(mc_dev, obj_desc)) + break; + } + + if (i == objs->child_count) + fsl_mc_device_remove(mc_dev); + + return 0; +} + +static int __fsl_mc_device_remove(struct device *dev, void *data) +{ + fsl_mc_device_remove(to_fsl_mc_device(dev)); + return 0; +} + +/** + * dprc_remove_devices - Removes devices for objects removed from a DPRC + * + * @mc_bus_dev: pointer to the fsl-mc device that represents a DPRC object + * @obj_desc_array: array of object descriptors for child objects currently + * present in the DPRC in the MC. + * @num_child_objects_in_mc: number of entries in obj_desc_array + * + * Synchronizes the state of the Linux bus driver with the actual state of + * the MC by removing devices that represent MC objects that have + * been dynamically removed in the physical DPRC. + */ +static void dprc_remove_devices(struct fsl_mc_device *mc_bus_dev, + struct fsl_mc_obj_desc *obj_desc_array, + int num_child_objects_in_mc) +{ + if (num_child_objects_in_mc != 0) { + /* + * Remove child objects that are in the DPRC in Linux, + * but not in the MC: + */ + struct fsl_mc_child_objs objs; + + objs.child_count = num_child_objects_in_mc; + objs.child_array = obj_desc_array; + device_for_each_child(&mc_bus_dev->dev, &objs, + __fsl_mc_device_remove_if_not_in_mc); + } else { + /* + * There are no child objects for this DPRC in the MC. + * So, remove all the child devices from Linux: + */ + device_for_each_child(&mc_bus_dev->dev, NULL, + __fsl_mc_device_remove); + } +} + +static int __fsl_mc_device_match(struct device *dev, void *data) +{ + struct fsl_mc_obj_desc *obj_desc = data; + struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); + + return fsl_mc_device_match(mc_dev, obj_desc); +} + +static struct fsl_mc_device *fsl_mc_device_lookup(struct fsl_mc_obj_desc + *obj_desc, + struct fsl_mc_device + *mc_bus_dev) +{ + struct device *dev; + + dev = device_find_child(&mc_bus_dev->dev, obj_desc, + __fsl_mc_device_match); + + return dev ? to_fsl_mc_device(dev) : NULL; +} + +/** + * check_plugged_state_change - Check change in an MC object's plugged state + * + * @mc_dev: pointer to the fsl-mc device for a given MC object + * @obj_desc: pointer to the MC object's descriptor in the MC + * + * If the plugged state has changed from unplugged to plugged, the fsl-mc + * device is bound to the corresponding device driver. + * If the plugged state has changed from plugged to unplugged, the fsl-mc + * device is unbound from the corresponding device driver. + */ +static void check_plugged_state_change(struct fsl_mc_device *mc_dev, + struct fsl_mc_obj_desc *obj_desc) +{ + int error; + u32 plugged_flag_at_mc = + obj_desc->state & FSL_MC_OBJ_STATE_PLUGGED; + + if (plugged_flag_at_mc != + (mc_dev->obj_desc.state & FSL_MC_OBJ_STATE_PLUGGED)) { + if (plugged_flag_at_mc) { + mc_dev->obj_desc.state |= FSL_MC_OBJ_STATE_PLUGGED; + error = device_attach(&mc_dev->dev); + if (error < 0) { + dev_err(&mc_dev->dev, + "device_attach() failed: %d\n", + error); + } + } else { + mc_dev->obj_desc.state &= ~FSL_MC_OBJ_STATE_PLUGGED; + device_release_driver(&mc_dev->dev); + } + } +} + +/** + * dprc_add_new_devices - Adds devices to the logical bus for a DPRC + * + * @mc_bus_dev: pointer to the fsl-mc device that represents a DPRC object + * @obj_desc_array: array of device descriptors for child devices currently + * present in the physical DPRC. + * @num_child_objects_in_mc: number of entries in obj_desc_array + * + * Synchronizes the state of the Linux bus driver with the actual + * state of the MC by adding objects that have been newly discovered + * in the physical DPRC. + */ +static void dprc_add_new_devices(struct fsl_mc_device *mc_bus_dev, + struct fsl_mc_obj_desc *obj_desc_array, + int num_child_objects_in_mc) +{ + int error; + int i; + + for (i = 0; i < num_child_objects_in_mc; i++) { + struct fsl_mc_device *child_dev; + struct fsl_mc_obj_desc *obj_desc = &obj_desc_array[i]; + + if (strlen(obj_desc->type) == 0) + continue; + + /* + * Check if device is already known to Linux: + */ + child_dev = fsl_mc_device_lookup(obj_desc, mc_bus_dev); + if (child_dev) { + check_plugged_state_change(child_dev, obj_desc); + put_device(&child_dev->dev); + continue; + } + + error = fsl_mc_device_add(obj_desc, NULL, &mc_bus_dev->dev, + &child_dev); + if (error < 0) + continue; + } +} + +/** + * dprc_scan_objects - Discover objects in a DPRC + * + * @mc_bus_dev: pointer to the fsl-mc device that represents a DPRC object + * @total_irq_count: If argument is provided the function populates the + * total number of IRQs created by objects in the DPRC. + * + * Detects objects added and removed from a DPRC and synchronizes the + * state of the Linux bus driver, MC by adding and removing + * devices accordingly. + * Two types of devices can be found in a DPRC: allocatable objects (e.g., + * dpbp, dpmcp) and non-allocatable devices (e.g., dprc, dpni). + * All allocatable devices needed to be probed before all non-allocatable + * devices, to ensure that device drivers for non-allocatable + * devices can allocate any type of allocatable devices. + * That is, we need to ensure that the corresponding resource pools are + * populated before they can get allocation requests from probe callbacks + * of the device drivers for the non-allocatable devices. + */ +static int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev, + unsigned int *total_irq_count) +{ + int num_child_objects; + int dprc_get_obj_failures; + int error; + unsigned int irq_count = mc_bus_dev->obj_desc.irq_count; + struct fsl_mc_obj_desc *child_obj_desc_array = NULL; + struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_bus_dev); + + error = dprc_get_obj_count(mc_bus_dev->mc_io, + 0, + mc_bus_dev->mc_handle, + &num_child_objects); + if (error < 0) { + dev_err(&mc_bus_dev->dev, "dprc_get_obj_count() failed: %d\n", + error); + return error; + } + + if (num_child_objects != 0) { + int i; + + child_obj_desc_array = + devm_kmalloc_array(&mc_bus_dev->dev, num_child_objects, + sizeof(*child_obj_desc_array), + GFP_KERNEL); + if (!child_obj_desc_array) + return -ENOMEM; + + /* + * Discover objects currently present in the physical DPRC: + */ + dprc_get_obj_failures = 0; + for (i = 0; i < num_child_objects; i++) { + struct fsl_mc_obj_desc *obj_desc = + &child_obj_desc_array[i]; + + error = dprc_get_obj(mc_bus_dev->mc_io, + 0, + mc_bus_dev->mc_handle, + i, obj_desc); + if (error < 0) { + dev_err(&mc_bus_dev->dev, + "dprc_get_obj(i=%d) failed: %d\n", + i, error); + /* + * Mark the obj entry as "invalid", by using the + * empty string as obj type: + */ + obj_desc->type[0] = '\0'; + obj_desc->id = error; + dprc_get_obj_failures++; + continue; + } + + /* + * add a quirk for all versions of dpsec < 4.0...none + * are coherent regardless of what the MC reports. + */ + if ((strcmp(obj_desc->type, "dpseci") == 0) && + (obj_desc->ver_major < 4)) + obj_desc->flags |= + FSL_MC_OBJ_FLAG_NO_MEM_SHAREABILITY; + + irq_count += obj_desc->irq_count; + dev_dbg(&mc_bus_dev->dev, + "Discovered object: type %s, id %d\n", + obj_desc->type, obj_desc->id); + } + + if (dprc_get_obj_failures != 0) { + dev_err(&mc_bus_dev->dev, + "%d out of %d devices could not be retrieved\n", + dprc_get_obj_failures, num_child_objects); + } + } + + /* + * Allocate IRQ's before binding the scanned devices with their + * respective drivers. + */ + if (dev_get_msi_domain(&mc_bus_dev->dev) && !mc_bus->irq_resources) { + if (irq_count > FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS) { + dev_warn(&mc_bus_dev->dev, + "IRQs needed (%u) exceed IRQs preallocated (%u)\n", + irq_count, FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS); + } + + error = fsl_mc_populate_irq_pool(mc_bus, + FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS); + if (error < 0) + return error; + } + + if (total_irq_count) + *total_irq_count = irq_count; + + dprc_remove_devices(mc_bus_dev, child_obj_desc_array, + num_child_objects); + + dprc_add_new_devices(mc_bus_dev, child_obj_desc_array, + num_child_objects); + + if (child_obj_desc_array) + devm_kfree(&mc_bus_dev->dev, child_obj_desc_array); + + return 0; +} + +/** + * dprc_scan_container - Scans a physical DPRC and synchronizes Linux bus state + * + * @mc_bus_dev: pointer to the fsl-mc device that represents a DPRC object + * + * Scans the physical DPRC and synchronizes the state of the Linux + * bus driver with the actual state of the MC by adding and removing + * devices as appropriate. + */ +static int dprc_scan_container(struct fsl_mc_device *mc_bus_dev) +{ + int error; + struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_bus_dev); + + fsl_mc_init_all_resource_pools(mc_bus_dev); + + /* + * Discover objects in the DPRC: + */ + mutex_lock(&mc_bus->scan_mutex); + error = dprc_scan_objects(mc_bus_dev, NULL); + mutex_unlock(&mc_bus->scan_mutex); + if (error < 0) { + fsl_mc_cleanup_all_resource_pools(mc_bus_dev); + return error; + } + + return 0; +} + +/** + * dprc_irq0_handler - Regular ISR for DPRC interrupt 0 + * + * @irq: IRQ number of the interrupt being handled + * @arg: Pointer to device structure + */ +static irqreturn_t dprc_irq0_handler(int irq_num, void *arg) +{ + return IRQ_WAKE_THREAD; +} + +/** + * dprc_irq0_handler_thread - Handler thread function for DPRC interrupt 0 + * + * @irq: IRQ number of the interrupt being handled + * @arg: Pointer to device structure + */ +static irqreturn_t dprc_irq0_handler_thread(int irq_num, void *arg) +{ + int error; + u32 status; + struct device *dev = arg; + struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); + struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev); + struct fsl_mc_io *mc_io = mc_dev->mc_io; + struct msi_desc *msi_desc = mc_dev->irqs[0]->msi_desc; + + dev_dbg(dev, "DPRC IRQ %d triggered on CPU %u\n", + irq_num, smp_processor_id()); + + if (!(mc_dev->flags & FSL_MC_IS_DPRC)) + return IRQ_HANDLED; + + mutex_lock(&mc_bus->scan_mutex); + if (!msi_desc || msi_desc->irq != (u32)irq_num) + goto out; + + status = 0; + error = dprc_get_irq_status(mc_io, 0, mc_dev->mc_handle, 0, + &status); + if (error < 0) { + dev_err(dev, + "dprc_get_irq_status() failed: %d\n", error); + goto out; + } + + error = dprc_clear_irq_status(mc_io, 0, mc_dev->mc_handle, 0, + status); + if (error < 0) { + dev_err(dev, + "dprc_clear_irq_status() failed: %d\n", error); + goto out; + } + + if (status & (DPRC_IRQ_EVENT_OBJ_ADDED | + DPRC_IRQ_EVENT_OBJ_REMOVED | + DPRC_IRQ_EVENT_CONTAINER_DESTROYED | + DPRC_IRQ_EVENT_OBJ_DESTROYED | + DPRC_IRQ_EVENT_OBJ_CREATED)) { + unsigned int irq_count; + + error = dprc_scan_objects(mc_dev, &irq_count); + if (error < 0) { + /* + * If the error is -ENXIO, we ignore it, as it indicates + * that the object scan was aborted, as we detected that + * an object was removed from the DPRC in the MC, while + * we were scanning the DPRC. + */ + if (error != -ENXIO) { + dev_err(dev, "dprc_scan_objects() failed: %d\n", + error); + } + + goto out; + } + + if (irq_count > FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS) { + dev_warn(dev, + "IRQs needed (%u) exceed IRQs preallocated (%u)\n", + irq_count, FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS); + } + } + +out: + mutex_unlock(&mc_bus->scan_mutex); + return IRQ_HANDLED; +} |