diff options
Diffstat (limited to 'drivers/staging/fsl-mc/bus/dpio')
-rw-r--r-- | drivers/staging/fsl-mc/bus/dpio/Makefile | 8 | ||||
-rw-r--r-- | drivers/staging/fsl-mc/bus/dpio/dpio-cmd.h | 49 | ||||
-rw-r--r-- | drivers/staging/fsl-mc/bus/dpio/dpio-driver.c | 281 | ||||
-rw-r--r-- | drivers/staging/fsl-mc/bus/dpio/dpio-driver.txt | 135 | ||||
-rw-r--r-- | drivers/staging/fsl-mc/bus/dpio/dpio-service.c | 545 | ||||
-rw-r--r-- | drivers/staging/fsl-mc/bus/dpio/dpio.c | 198 | ||||
-rw-r--r-- | drivers/staging/fsl-mc/bus/dpio/dpio.h | 83 | ||||
-rw-r--r-- | drivers/staging/fsl-mc/bus/dpio/qbman-portal.c | 1005 | ||||
-rw-r--r-- | drivers/staging/fsl-mc/bus/dpio/qbman-portal.h | 444 |
9 files changed, 0 insertions, 2748 deletions
diff --git a/drivers/staging/fsl-mc/bus/dpio/Makefile b/drivers/staging/fsl-mc/bus/dpio/Makefile deleted file mode 100644 index b9ff24c76582..000000000000 --- a/drivers/staging/fsl-mc/bus/dpio/Makefile +++ /dev/null @@ -1,8 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# -# QorIQ DPAA2 DPIO driver -# - -obj-$(CONFIG_FSL_MC_DPIO) += fsl-mc-dpio.o - -fsl-mc-dpio-objs := dpio.o qbman-portal.o dpio-service.o dpio-driver.o diff --git a/drivers/staging/fsl-mc/bus/dpio/dpio-cmd.h b/drivers/staging/fsl-mc/bus/dpio/dpio-cmd.h deleted file mode 100644 index ab8f82ee7ee5..000000000000 --- a/drivers/staging/fsl-mc/bus/dpio/dpio-cmd.h +++ /dev/null @@ -1,49 +0,0 @@ -/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */ -/* - * Copyright 2013-2016 Freescale Semiconductor Inc. - * Copyright 2016 NXP - * - */ -#ifndef _FSL_DPIO_CMD_H -#define _FSL_DPIO_CMD_H - -/* DPIO Version */ -#define DPIO_VER_MAJOR 4 -#define DPIO_VER_MINOR 2 - -/* Command Versioning */ - -#define DPIO_CMD_ID_OFFSET 4 -#define DPIO_CMD_BASE_VERSION 1 - -#define DPIO_CMD(id) (((id) << DPIO_CMD_ID_OFFSET) | DPIO_CMD_BASE_VERSION) - -/* Command IDs */ -#define DPIO_CMDID_CLOSE DPIO_CMD(0x800) -#define DPIO_CMDID_OPEN DPIO_CMD(0x803) -#define DPIO_CMDID_GET_API_VERSION DPIO_CMD(0xa03) -#define DPIO_CMDID_ENABLE DPIO_CMD(0x002) -#define DPIO_CMDID_DISABLE DPIO_CMD(0x003) -#define DPIO_CMDID_GET_ATTR DPIO_CMD(0x004) - -struct dpio_cmd_open { - __le32 dpio_id; -}; - -#define DPIO_CHANNEL_MODE_MASK 0x3 - -struct dpio_rsp_get_attr { - /* cmd word 0 */ - __le32 id; - __le16 qbman_portal_id; - u8 num_priorities; - u8 channel_mode; - /* cmd word 1 */ - __le64 qbman_portal_ce_addr; - /* cmd word 2 */ - __le64 qbman_portal_ci_addr; - /* cmd word 3 */ - __le32 qbman_version; -}; - -#endif /* _FSL_DPIO_CMD_H */ diff --git a/drivers/staging/fsl-mc/bus/dpio/dpio-driver.c b/drivers/staging/fsl-mc/bus/dpio/dpio-driver.c deleted file mode 100644 index 11a90a90d827..000000000000 --- a/drivers/staging/fsl-mc/bus/dpio/dpio-driver.c +++ /dev/null @@ -1,281 +0,0 @@ -// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) -/* - * Copyright 2014-2016 Freescale Semiconductor Inc. - * Copyright NXP 2016 - * - */ - -#include <linux/types.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/interrupt.h> -#include <linux/msi.h> -#include <linux/dma-mapping.h> -#include <linux/delay.h> -#include <linux/io.h> - -#include <linux/fsl/mc.h> -#include "../../include/dpaa2-io.h" - -#include "qbman-portal.h" -#include "dpio.h" -#include "dpio-cmd.h" - -MODULE_LICENSE("Dual BSD/GPL"); -MODULE_AUTHOR("Freescale Semiconductor, Inc"); -MODULE_DESCRIPTION("DPIO Driver"); - -struct dpio_priv { - struct dpaa2_io *io; -}; - -static irqreturn_t dpio_irq_handler(int irq_num, void *arg) -{ - struct device *dev = (struct device *)arg; - struct dpio_priv *priv = dev_get_drvdata(dev); - - return dpaa2_io_irq(priv->io); -} - -static void unregister_dpio_irq_handlers(struct fsl_mc_device *dpio_dev) -{ - struct fsl_mc_device_irq *irq; - - irq = dpio_dev->irqs[0]; - - /* clear the affinity hint */ - irq_set_affinity_hint(irq->msi_desc->irq, NULL); -} - -static int register_dpio_irq_handlers(struct fsl_mc_device *dpio_dev, int cpu) -{ - struct dpio_priv *priv; - int error; - struct fsl_mc_device_irq *irq; - cpumask_t mask; - - priv = dev_get_drvdata(&dpio_dev->dev); - - irq = dpio_dev->irqs[0]; - error = devm_request_irq(&dpio_dev->dev, - irq->msi_desc->irq, - dpio_irq_handler, - 0, - dev_name(&dpio_dev->dev), - &dpio_dev->dev); - if (error < 0) { - dev_err(&dpio_dev->dev, - "devm_request_irq() failed: %d\n", - error); - return error; - } - - /* set the affinity hint */ - cpumask_clear(&mask); - cpumask_set_cpu(cpu, &mask); - if (irq_set_affinity_hint(irq->msi_desc->irq, &mask)) - dev_err(&dpio_dev->dev, - "irq_set_affinity failed irq %d cpu %d\n", - irq->msi_desc->irq, cpu); - - return 0; -} - -static int dpaa2_dpio_probe(struct fsl_mc_device *dpio_dev) -{ - struct dpio_attr dpio_attrs; - struct dpaa2_io_desc desc; - struct dpio_priv *priv; - int err = -ENOMEM; - struct device *dev = &dpio_dev->dev; - static int next_cpu = -1; - - priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); - if (!priv) - goto err_priv_alloc; - - dev_set_drvdata(dev, priv); - - err = fsl_mc_portal_allocate(dpio_dev, 0, &dpio_dev->mc_io); - if (err) { - dev_dbg(dev, "MC portal allocation failed\n"); - err = -EPROBE_DEFER; - goto err_priv_alloc; - } - - err = dpio_open(dpio_dev->mc_io, 0, dpio_dev->obj_desc.id, - &dpio_dev->mc_handle); - if (err) { - dev_err(dev, "dpio_open() failed\n"); - goto err_open; - } - - err = dpio_get_attributes(dpio_dev->mc_io, 0, dpio_dev->mc_handle, - &dpio_attrs); - if (err) { - dev_err(dev, "dpio_get_attributes() failed %d\n", err); - goto err_get_attr; - } - desc.qman_version = dpio_attrs.qbman_version; - - err = dpio_enable(dpio_dev->mc_io, 0, dpio_dev->mc_handle); - if (err) { - dev_err(dev, "dpio_enable() failed %d\n", err); - goto err_get_attr; - } - - /* initialize DPIO descriptor */ - desc.receives_notifications = dpio_attrs.num_priorities ? 1 : 0; - desc.has_8prio = dpio_attrs.num_priorities == 8 ? 1 : 0; - desc.dpio_id = dpio_dev->obj_desc.id; - - /* get the cpu to use for the affinity hint */ - if (next_cpu == -1) - next_cpu = cpumask_first(cpu_online_mask); - else - next_cpu = cpumask_next(next_cpu, cpu_online_mask); - - if (!cpu_possible(next_cpu)) { - dev_err(dev, "probe failed. Number of DPIOs exceeds NR_CPUS.\n"); - err = -ERANGE; - goto err_allocate_irqs; - } - desc.cpu = next_cpu; - - /* - * Set the CENA regs to be the cache inhibited area of the portal to - * avoid coherency issues if a user migrates to another core. - */ - desc.regs_cena = devm_memremap(dev, dpio_dev->regions[1].start, - resource_size(&dpio_dev->regions[1]), - MEMREMAP_WC); - if (IS_ERR(desc.regs_cena)) { - dev_err(dev, "devm_memremap failed\n"); - err = PTR_ERR(desc.regs_cena); - goto err_allocate_irqs; - } - - desc.regs_cinh = devm_ioremap(dev, dpio_dev->regions[1].start, - resource_size(&dpio_dev->regions[1])); - if (!desc.regs_cinh) { - err = -ENOMEM; - dev_err(dev, "devm_ioremap failed\n"); - goto err_allocate_irqs; - } - - err = fsl_mc_allocate_irqs(dpio_dev); - if (err) { - dev_err(dev, "fsl_mc_allocate_irqs failed. err=%d\n", err); - goto err_allocate_irqs; - } - - err = register_dpio_irq_handlers(dpio_dev, desc.cpu); - if (err) - goto err_register_dpio_irq; - - priv->io = dpaa2_io_create(&desc); - if (!priv->io) { - dev_err(dev, "dpaa2_io_create failed\n"); - err = -ENOMEM; - goto err_dpaa2_io_create; - } - - dev_info(dev, "probed\n"); - dev_dbg(dev, " receives_notifications = %d\n", - desc.receives_notifications); - dpio_close(dpio_dev->mc_io, 0, dpio_dev->mc_handle); - fsl_mc_portal_free(dpio_dev->mc_io); - - return 0; - -err_dpaa2_io_create: - unregister_dpio_irq_handlers(dpio_dev); -err_register_dpio_irq: - fsl_mc_free_irqs(dpio_dev); -err_allocate_irqs: - dpio_disable(dpio_dev->mc_io, 0, dpio_dev->mc_handle); -err_get_attr: - dpio_close(dpio_dev->mc_io, 0, dpio_dev->mc_handle); -err_open: - fsl_mc_portal_free(dpio_dev->mc_io); -err_priv_alloc: - return err; -} - -/* Tear down interrupts for a given DPIO object */ -static void dpio_teardown_irqs(struct fsl_mc_device *dpio_dev) -{ - unregister_dpio_irq_handlers(dpio_dev); - fsl_mc_free_irqs(dpio_dev); -} - -static int dpaa2_dpio_remove(struct fsl_mc_device *dpio_dev) -{ - struct device *dev; - struct dpio_priv *priv; - int err; - - dev = &dpio_dev->dev; - priv = dev_get_drvdata(dev); - - dpaa2_io_down(priv->io); - - dpio_teardown_irqs(dpio_dev); - - err = fsl_mc_portal_allocate(dpio_dev, 0, &dpio_dev->mc_io); - if (err) { - dev_err(dev, "MC portal allocation failed\n"); - goto err_mcportal; - } - - err = dpio_open(dpio_dev->mc_io, 0, dpio_dev->obj_desc.id, - &dpio_dev->mc_handle); - if (err) { - dev_err(dev, "dpio_open() failed\n"); - goto err_open; - } - - dpio_disable(dpio_dev->mc_io, 0, dpio_dev->mc_handle); - - dpio_close(dpio_dev->mc_io, 0, dpio_dev->mc_handle); - - fsl_mc_portal_free(dpio_dev->mc_io); - - return 0; - -err_open: - fsl_mc_portal_free(dpio_dev->mc_io); -err_mcportal: - return err; -} - -static const struct fsl_mc_device_id dpaa2_dpio_match_id_table[] = { - { - .vendor = FSL_MC_VENDOR_FREESCALE, - .obj_type = "dpio", - }, - { .vendor = 0x0 } -}; - -static struct fsl_mc_driver dpaa2_dpio_driver = { - .driver = { - .name = KBUILD_MODNAME, - .owner = THIS_MODULE, - }, - .probe = dpaa2_dpio_probe, - .remove = dpaa2_dpio_remove, - .match_id_table = dpaa2_dpio_match_id_table -}; - -static int dpio_driver_init(void) -{ - return fsl_mc_driver_register(&dpaa2_dpio_driver); -} - -static void dpio_driver_exit(void) -{ - fsl_mc_driver_unregister(&dpaa2_dpio_driver); -} -module_init(dpio_driver_init); -module_exit(dpio_driver_exit); diff --git a/drivers/staging/fsl-mc/bus/dpio/dpio-driver.txt b/drivers/staging/fsl-mc/bus/dpio/dpio-driver.txt deleted file mode 100644 index 72ba9da3d179..000000000000 --- a/drivers/staging/fsl-mc/bus/dpio/dpio-driver.txt +++ /dev/null @@ -1,135 +0,0 @@ -Copyright 2016 NXP - -Introduction ------------- - -A DPAA2 DPIO (Data Path I/O) is a hardware object that provides -interfaces to enqueue and dequeue frames to/from network interfaces -and other accelerators. A DPIO also provides hardware buffer -pool management for network interfaces. - -This document provides an overview the Linux DPIO driver, its -subcomponents, and its APIs. - -See Documentation/networking/dpaa2/overview.rst for a general overview of DPAA2 -and the general DPAA2 driver architecture in Linux. - -Driver Overview ---------------- - -The DPIO driver is bound to DPIO objects discovered on the fsl-mc bus and -provides services that: - A) allow other drivers, such as the Ethernet driver, to enqueue and dequeue - frames for their respective objects - B) allow drivers to register callbacks for data availability notifications - when data becomes available on a queue or channel - C) allow drivers to manage hardware buffer pools - -The Linux DPIO driver consists of 3 primary components-- - DPIO object driver-- fsl-mc driver that manages the DPIO object - DPIO service-- provides APIs to other Linux drivers for services - QBman portal interface-- sends portal commands, gets responses - - fsl-mc other - bus drivers - | | - +---+----+ +------+-----+ - |DPIO obj| |DPIO service| - | driver |---| (DPIO) | - +--------+ +------+-----+ - | - +------+-----+ - | QBman | - | portal i/f | - +------------+ - | - hardware - -The diagram below shows how the DPIO driver components fit with the other -DPAA2 Linux driver components: - +------------+ - | OS Network | - | Stack | - +------------+ +------------+ - | Allocator |. . . . . . . | Ethernet | - |(DPMCP,DPBP)| | (DPNI) | - +-.----------+ +---+---+----+ - . . ^ | - . . <data avail, | |<enqueue, - . . tx confirm> | | dequeue> - +-------------+ . | | - | DPRC driver | . +--------+ +------------+ - | (DPRC) | . . |DPIO obj| |DPIO service| - +----------+--+ | driver |-| (DPIO) | - | +--------+ +------+-----+ - |<dev add/remove> +------|-----+ - | | QBman | - +----+--------------+ | portal i/f | - | MC-bus driver | +------------+ - | | | - | /soc/fsl-mc | | - +-------------------+ | - | - =========================================|=========|======================== - +-+--DPIO---|-----------+ - | | | - | QBman Portal | - +-----------------------+ - - ============================================================================ - - -DPIO Object Driver (dpio-driver.c) ----------------------------------- - - The dpio-driver component registers with the fsl-mc bus to handle objects of - type "dpio". The implementation of probe() handles basic initialization - of the DPIO including mapping of the DPIO regions (the QBman SW portal) - and initializing interrupts and registering irq handlers. The dpio-driver - registers the probed DPIO with dpio-service. - -DPIO service (dpio-service.c, dpaa2-io.h) ------------------------------------------- - - The dpio service component provides queuing, notification, and buffers - management services to DPAA2 drivers, such as the Ethernet driver. A system - will typically allocate 1 DPIO object per CPU to allow queuing operations - to happen simultaneously across all CPUs. - - Notification handling - dpaa2_io_service_register() - dpaa2_io_service_deregister() - dpaa2_io_service_rearm() - - Queuing - dpaa2_io_service_pull_fq() - dpaa2_io_service_pull_channel() - dpaa2_io_service_enqueue_fq() - dpaa2_io_service_enqueue_qd() - dpaa2_io_store_create() - dpaa2_io_store_destroy() - dpaa2_io_store_next() - - Buffer pool management - dpaa2_io_service_release() - dpaa2_io_service_acquire() - -QBman portal interface (qbman-portal.c) ---------------------------------------- - - The qbman-portal component provides APIs to do the low level hardware - bit twiddling for operations such as: - -initializing Qman software portals - -building and sending portal commands - -portal interrupt configuration and processing - - The qbman-portal APIs are not public to other drivers, and are - only used by dpio-service. - -Other (dpaa2-fd.h, dpaa2-global.h) ----------------------------------- - - Frame descriptor and scatter-gather definitions and the APIs used to - manipulate them are defined in dpaa2-fd.h. - - Dequeue result struct and parsing APIs are defined in dpaa2-global.h. diff --git a/drivers/staging/fsl-mc/bus/dpio/dpio-service.c b/drivers/staging/fsl-mc/bus/dpio/dpio-service.c deleted file mode 100644 index 14ed2beb7432..000000000000 --- a/drivers/staging/fsl-mc/bus/dpio/dpio-service.c +++ /dev/null @@ -1,545 +0,0 @@ -// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) -/* - * Copyright 2014-2016 Freescale Semiconductor Inc. - * Copyright 2016 NXP - * - */ -#include <linux/types.h> -#include <linux/fsl/mc.h> -#include "../../include/dpaa2-io.h" -#include <linux/init.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/interrupt.h> -#include <linux/dma-mapping.h> -#include <linux/slab.h> - -#include "dpio.h" -#include "qbman-portal.h" - -struct dpaa2_io { - struct dpaa2_io_desc dpio_desc; - struct qbman_swp_desc swp_desc; - struct qbman_swp *swp; - struct list_head node; - /* protect against multiple management commands */ - spinlock_t lock_mgmt_cmd; - /* protect notifications list */ - spinlock_t lock_notifications; - struct list_head notifications; -}; - -struct dpaa2_io_store { - unsigned int max; - dma_addr_t paddr; - struct dpaa2_dq *vaddr; - void *alloced_addr; /* unaligned value from kmalloc() */ - unsigned int idx; /* position of the next-to-be-returned entry */ - struct qbman_swp *swp; /* portal used to issue VDQCR */ - struct device *dev; /* device used for DMA mapping */ -}; - -/* keep a per cpu array of DPIOs for fast access */ -static struct dpaa2_io *dpio_by_cpu[NR_CPUS]; -static struct list_head dpio_list = LIST_HEAD_INIT(dpio_list); -static DEFINE_SPINLOCK(dpio_list_lock); - -static inline struct dpaa2_io *service_select_by_cpu(struct dpaa2_io *d, - int cpu) -{ - if (d) - return d; - - if (cpu != DPAA2_IO_ANY_CPU && cpu >= num_possible_cpus()) - return NULL; - - /* - * If cpu == -1, choose the current cpu, with no guarantees about - * potentially being migrated away. - */ - if (unlikely(cpu < 0)) - cpu = smp_processor_id(); - - /* If a specific cpu was requested, pick it up immediately */ - return dpio_by_cpu[cpu]; -} - -static inline struct dpaa2_io *service_select(struct dpaa2_io *d) -{ - if (d) - return d; - - spin_lock(&dpio_list_lock); - d = list_entry(dpio_list.next, struct dpaa2_io, node); - list_del(&d->node); - list_add_tail(&d->node, &dpio_list); - spin_unlock(&dpio_list_lock); - - return d; -} - -/** - * dpaa2_io_service_select() - return a dpaa2_io service affined to this cpu - * @cpu: the cpu id - * - * Return the affine dpaa2_io service, or NULL if there is no service affined - * to the specified cpu. If DPAA2_IO_ANY_CPU is used, return the next available - * service. - */ -struct dpaa2_io *dpaa2_io_service_select(int cpu) -{ - if (cpu == DPAA2_IO_ANY_CPU) - return service_select(NULL); - - return service_select_by_cpu(NULL, cpu); -} -EXPORT_SYMBOL_GPL(dpaa2_io_service_select); - -/** - * dpaa2_io_create() - create a dpaa2_io object. - * @desc: the dpaa2_io descriptor - * - * Activates a "struct dpaa2_io" corresponding to the given config of an actual - * DPIO object. - * - * Return a valid dpaa2_io object for success, or NULL for failure. - */ -struct dpaa2_io *dpaa2_io_create(const struct dpaa2_io_desc *desc) -{ - struct dpaa2_io *obj = kmalloc(sizeof(*obj), GFP_KERNEL); - - if (!obj) - return NULL; - - /* check if CPU is out of range (-1 means any cpu) */ - if (desc->cpu != DPAA2_IO_ANY_CPU && desc->cpu >= num_possible_cpus()) { - kfree(obj); - return NULL; - } - - obj->dpio_desc = *desc; - obj->swp_desc.cena_bar = obj->dpio_desc.regs_cena; - obj->swp_desc.cinh_bar = obj->dpio_desc.regs_cinh; - obj->swp_desc.qman_version = obj->dpio_desc.qman_version; - obj->swp = qbman_swp_init(&obj->swp_desc); - - if (!obj->swp) { - kfree(obj); - return NULL; - } - - INIT_LIST_HEAD(&obj->node); - spin_lock_init(&obj->lock_mgmt_cmd); - spin_lock_init(&obj->lock_notifications); - INIT_LIST_HEAD(&obj->notifications); - - /* For now only enable DQRR interrupts */ - qbman_swp_interrupt_set_trigger(obj->swp, - QBMAN_SWP_INTERRUPT_DQRI); - qbman_swp_interrupt_clear_status(obj->swp, 0xffffffff); - if (obj->dpio_desc.receives_notifications) - qbman_swp_push_set(obj->swp, 0, 1); - - spin_lock(&dpio_list_lock); - list_add_tail(&obj->node, &dpio_list); - if (desc->cpu >= 0 && !dpio_by_cpu[desc->cpu]) - dpio_by_cpu[desc->cpu] = obj; - spin_unlock(&dpio_list_lock); - - return obj; -} - -/** - * dpaa2_io_down() - release the dpaa2_io object. - * @d: the dpaa2_io object to be released. - * - * The "struct dpaa2_io" type can represent an individual DPIO object (as - * described by "struct dpaa2_io_desc") or an instance of a "DPIO service", - * which can be used to group/encapsulate multiple DPIO objects. In all cases, - * each handle obtained should be released using this function. - */ -void dpaa2_io_down(struct dpaa2_io *d) -{ - kfree(d); -} - -#define DPAA_POLL_MAX 32 - -/** - * dpaa2_io_irq() - ISR for DPIO interrupts - * - * @obj: the given DPIO object. - * - * Return IRQ_HANDLED for success or IRQ_NONE if there - * were no pending interrupts. - */ -irqreturn_t dpaa2_io_irq(struct dpaa2_io *obj) -{ - const struct dpaa2_dq *dq; - int max = 0; - struct qbman_swp *swp; - u32 status; - - swp = obj->swp; - status = qbman_swp_interrupt_read_status(swp); - if (!status) - return IRQ_NONE; - - dq = qbman_swp_dqrr_next(swp); - while (dq) { - if (qbman_result_is_SCN(dq)) { - struct dpaa2_io_notification_ctx *ctx; - u64 q64; - - q64 = qbman_result_SCN_ctx(dq); - ctx = (void *)(uintptr_t)q64; - ctx->cb(ctx); - } else { - pr_crit("fsl-mc-dpio: Unrecognised/ignored DQRR entry\n"); - } - qbman_swp_dqrr_consume(swp, dq); - ++max; - if (max > DPAA_POLL_MAX) - goto done; - dq = qbman_swp_dqrr_next(swp); - } -done: - qbman_swp_interrupt_clear_status(swp, status); - qbman_swp_interrupt_set_inhibit(swp, 0); - return IRQ_HANDLED; -} - -/** - * dpaa2_io_service_register() - Prepare for servicing of FQDAN or CDAN - * notifications on the given DPIO service. - * @d: the given DPIO service. - * @ctx: the notification context. - * - * The caller should make the MC command to attach a DPAA2 object to - * a DPIO after this function completes successfully. In that way: - * (a) The DPIO service is "ready" to handle a notification arrival - * (which might happen before the "attach" command to MC has - * returned control of execution back to the caller) - * (b) The DPIO service can provide back to the caller the 'dpio_id' and - * 'qman64' parameters that it should pass along in the MC command - * in order for the object to be configured to produce the right - * notification fields to the DPIO service. - * - * Return 0 for success, or -ENODEV for failure. - */ -int dpaa2_io_service_register(struct dpaa2_io *d, - struct dpaa2_io_notification_ctx *ctx) -{ - unsigned long irqflags; - - d = service_select_by_cpu(d, ctx->desired_cpu); - if (!d) - return -ENODEV; - - ctx->dpio_id = d->dpio_desc.dpio_id; - ctx->qman64 = (u64)(uintptr_t)ctx; - ctx->dpio_private = d; - spin_lock_irqsave(&d->lock_notifications, irqflags); - list_add(&ctx->node, &d->notifications); - spin_unlock_irqrestore(&d->lock_notifications, irqflags); - - /* Enable the generation of CDAN notifications */ - if (ctx->is_cdan) - return qbman_swp_CDAN_set_context_enable(d->swp, - (u16)ctx->id, - ctx->qman64); - return 0; -} -EXPORT_SYMBOL_GPL(dpaa2_io_service_register); - -/** - * dpaa2_io_service_deregister - The opposite of 'register'. - * @service: the given DPIO service. - * @ctx: the notification context. - * - * This function should be called only after sending the MC command to - * to detach the notification-producing device from the DPIO. - */ -void dpaa2_io_service_deregister(struct dpaa2_io *service, - struct dpaa2_io_notification_ctx *ctx) -{ - struct dpaa2_io *d = ctx->dpio_private; - unsigned long irqflags; - - if (ctx->is_cdan) - qbman_swp_CDAN_disable(d->swp, (u16)ctx->id); - - spin_lock_irqsave(&d->lock_notifications, irqflags); - list_del(&ctx->node); - spin_unlock_irqrestore(&d->lock_notifications, irqflags); -} -EXPORT_SYMBOL_GPL(dpaa2_io_service_deregister); - -/** - * dpaa2_io_service_rearm() - Rearm the notification for the given DPIO service. - * @d: the given DPIO service. - * @ctx: the notification context. - * - * Once a FQDAN/CDAN has been produced, the corresponding FQ/channel is - * considered "disarmed". Ie. the user can issue pull dequeue operations on that - * traffic source for as long as it likes. Eventually it may wish to "rearm" - * that source to allow it to produce another FQDAN/CDAN, that's what this - * function achieves. - * - * Return 0 for success. - */ -int dpaa2_io_service_rearm(struct dpaa2_io *d, - struct dpaa2_io_notification_ctx *ctx) -{ - unsigned long irqflags; - int err; - - d = service_select_by_cpu(d, ctx->desired_cpu); - if (!unlikely(d)) - return -ENODEV; - - spin_lock_irqsave(&d->lock_mgmt_cmd, irqflags); - if (ctx->is_cdan) - err = qbman_swp_CDAN_enable(d->swp, (u16)ctx->id); - else - err = qbman_swp_fq_schedule(d->swp, ctx->id); - spin_unlock_irqrestore(&d->lock_mgmt_cmd, irqflags); - - return err; -} -EXPORT_SYMBOL_GPL(dpaa2_io_service_rearm); - -/** - * dpaa2_io_service_pull_channel() - pull dequeue functions from a channel. - * @d: the given DPIO service. - * @channelid: the given channel id. - * @s: the dpaa2_io_store object for the result. - * - * Return 0 for success, or error code for failure. - */ -int dpaa2_io_service_pull_channel(struct dpaa2_io *d, u32 channelid, - struct dpaa2_io_store *s) -{ - struct qbman_pull_desc pd; - int err; - - qbman_pull_desc_clear(&pd); - qbman_pull_desc_set_storage(&pd, s->vaddr, s->paddr, 1); - qbman_pull_desc_set_numframes(&pd, (u8)s->max); - qbman_pull_desc_set_channel(&pd, channelid, qbman_pull_type_prio); - - d = service_select(d); - if (!d) - return -ENODEV; - - s->swp = d->swp; - err = qbman_swp_pull(d->swp, &pd); - if (err) - s->swp = NULL; - - return err; -} -EXPORT_SYMBOL_GPL(dpaa2_io_service_pull_channel); - -/** - * dpaa2_io_service_enqueue_qd() - Enqueue a frame to a QD. - * @d: the given DPIO service. - * @qdid: the given queuing destination id. - * @prio: the given queuing priority. - * @qdbin: the given queuing destination bin. - * @fd: the frame descriptor which is enqueued. - * - * Return 0 for successful enqueue, or -EBUSY if the enqueue ring is not ready, - * or -ENODEV if there is no dpio service. - */ -int dpaa2_io_service_enqueue_qd(struct dpaa2_io *d, - u32 qdid, u8 prio, u16 qdbin, - const struct dpaa2_fd *fd) -{ - struct qbman_eq_desc ed; - - d = service_select(d); - if (!d) - return -ENODEV; - - qbman_eq_desc_clear(&ed); - qbman_eq_desc_set_no_orp(&ed, 0); - qbman_eq_desc_set_qd(&ed, qdid, qdbin, prio); - - return qbman_swp_enqueue(d->swp, &ed, fd); -} -EXPORT_SYMBOL_GPL(dpaa2_io_service_enqueue_qd); - -/** - * dpaa2_io_service_release() - Release buffers to a buffer pool. - * @d: the given DPIO object. - * @bpid: the buffer pool id. - * @buffers: the buffers to be released. - * @num_buffers: the number of the buffers to be released. - * - * Return 0 for success, and negative error code for failure. - */ -int dpaa2_io_service_release(struct dpaa2_io *d, - u32 bpid, - const u64 *buffers, - unsigned int num_buffers) -{ - struct qbman_release_desc rd; - - d = service_select(d); - if (!d) - return -ENODEV; - - qbman_release_desc_clear(&rd); - qbman_release_desc_set_bpid(&rd, bpid); - - return qbman_swp_release(d->swp, &rd, buffers, num_buffers); -} -EXPORT_SYMBOL_GPL(dpaa2_io_service_release); - -/** - * dpaa2_io_service_acquire() - Acquire buffers from a buffer pool. - * @d: the given DPIO object. - * @bpid: the buffer pool id. - * @buffers: the buffer addresses for acquired buffers. - * @num_buffers: the expected number of the buffers to acquire. - * - * Return a negative error code if the command failed, otherwise it returns - * the number of buffers acquired, which may be less than the number requested. - * Eg. if the buffer pool is empty, this will return zero. - */ -int dpaa2_io_service_acquire(struct dpaa2_io *d, - u32 bpid, - u64 *buffers, - unsigned int num_buffers) -{ - unsigned long irqflags; - int err; - - d = service_select(d); - if (!d) - return -ENODEV; - - spin_lock_irqsave(&d->lock_mgmt_cmd, irqflags); - err = qbman_swp_acquire(d->swp, bpid, buffers, num_buffers); - spin_unlock_irqrestore(&d->lock_mgmt_cmd, irqflags); - - return err; -} -EXPORT_SYMBOL_GPL(dpaa2_io_service_acquire); - -/* - * 'Stores' are reusable memory blocks for holding dequeue results, and to - * assist with parsing those results. - */ - -/** - * dpaa2_io_store_create() - Create the dma memory storage for dequeue result. - * @max_frames: the maximum number of dequeued result for frames, must be <= 16. - * @dev: the device to allow mapping/unmapping the DMAable region. - * - * The size of the storage is "max_frames*sizeof(struct dpaa2_dq)". - * The 'dpaa2_io_store' returned is a DPIO service managed object. - * - * Return pointer to dpaa2_io_store struct for successfully created storage - * memory, or NULL on error. - */ -struct dpaa2_io_store *dpaa2_io_store_create(unsigned int max_frames, - struct device *dev) -{ - struct dpaa2_io_store *ret; - size_t size; - - if (!max_frames || (max_frames > 16)) - return NULL; - - ret = kmalloc(sizeof(*ret), GFP_KERNEL); - if (!ret) - return NULL; - - ret->max = max_frames; - size = max_frames * sizeof(struct dpaa2_dq) + 64; - ret->alloced_addr = kzalloc(size, GFP_KERNEL); - if (!ret->alloced_addr) { - kfree(ret); - return NULL; - } - - ret->vaddr = PTR_ALIGN(ret->alloced_addr, 64); - ret->paddr = dma_map_single(dev, ret->vaddr, - sizeof(struct dpaa2_dq) * max_frames, - DMA_FROM_DEVICE); - if (dma_mapping_error(dev, ret->paddr)) { - kfree(ret->alloced_addr); - kfree(ret); - return NULL; - } - - ret->idx = 0; - ret->dev = dev; - - return ret; -} -EXPORT_SYMBOL_GPL(dpaa2_io_store_create); - -/** - * dpaa2_io_store_destroy() - Frees the dma memory storage for dequeue - * result. - * @s: the storage memory to be destroyed. - */ -void dpaa2_io_store_destroy(struct dpaa2_io_store *s) -{ - dma_unmap_single(s->dev, s->paddr, sizeof(struct dpaa2_dq) * s->max, - DMA_FROM_DEVICE); - kfree(s->alloced_addr); - kfree(s); -} -EXPORT_SYMBOL_GPL(dpaa2_io_store_destroy); - -/** - * dpaa2_io_store_next() - Determine when the next dequeue result is available. - * @s: the dpaa2_io_store object. - * @is_last: indicate whether this is the last frame in the pull command. - * - * When an object driver performs dequeues to a dpaa2_io_store, this function - * can be used to determine when the next frame result is available. Once - * this function returns non-NULL, a subsequent call to it will try to find - * the next dequeue result. - * - * Note that if a pull-dequeue has a NULL result because the target FQ/channel - * was empty, then this function will also return NULL (rather than expecting - * the caller to always check for this. As such, "is_last" can be used to - * differentiate between "end-of-empty-dequeue" and "still-waiting". - * - * Return dequeue result for a valid dequeue result, or NULL for empty dequeue. - */ -struct dpaa2_dq *dpaa2_io_store_next(struct dpaa2_io_store *s, int *is_last) -{ - int match; - struct dpaa2_dq *ret = &s->vaddr[s->idx]; - - match = qbman_result_has_new_result(s->swp, ret); - if (!match) { - *is_last = 0; - return NULL; - } - - s->idx++; - - if (dpaa2_dq_is_pull_complete(ret)) { - *is_last = 1; - s->idx = 0; - /* - * If we get an empty dequeue result to terminate a zero-results - * vdqcr, return NULL to the caller rather than expecting him to - * check non-NULL results every time. - */ - if (!(dpaa2_dq_flags(ret) & DPAA2_DQ_STAT_VALIDFRAME)) - ret = NULL; - } else { - *is_last = 0; - } - - return ret; -} -EXPORT_SYMBOL_GPL(dpaa2_io_store_next); diff --git a/drivers/staging/fsl-mc/bus/dpio/dpio.c b/drivers/staging/fsl-mc/bus/dpio/dpio.c deleted file mode 100644 index ff37c80e11a0..000000000000 --- a/drivers/staging/fsl-mc/bus/dpio/dpio.c +++ /dev/null @@ -1,198 +0,0 @@ -// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) -/* - * Copyright 2013-2016 Freescale Semiconductor Inc. - * Copyright 2016 NXP - * - */ -#include <linux/kernel.h> -#include <linux/fsl/mc.h> - -#include "dpio.h" -#include "dpio-cmd.h" - -/* - * Data Path I/O Portal API - * Contains initialization APIs and runtime control APIs for DPIO - */ - -/** - * dpio_open() - Open a control session for the specified object - * @mc_io: Pointer to MC portal's I/O object - * @cmd_fla |