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![Marc Zyngier](/assets/img/avatar_default.png)
The Keystone QMSS driver is pretty damaged, in the sense that it does things like this: irq_set_affinity_hint(irq, to_cpumask(&cpu_map)); where cpu_map is a local variable. As we leave the function, this will point to nowhere-land, and things will end-up badly. Instead, let's use a proper cpumask that gets allocated, giving the driver a chance to actually work with things like irqbalance as well as have a hypothetical 64bit future. Cc: stable@vger.kernel.org Acked-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Olof Johansson <olof@lixom.net>
1920 lines
47 KiB
C
1920 lines
47 KiB
C
/*
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* Keystone Queue Manager subsystem driver
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*
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* Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com
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* Authors: Sandeep Nair <sandeep_n@ti.com>
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* Cyril Chemparathy <cyril@ti.com>
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* Santosh Shilimkar <santosh.shilimkar@ti.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#include <linux/debugfs.h>
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#include <linux/dma-mapping.h>
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#include <linux/firmware.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/of_address.h>
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#include <linux/of_device.h>
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#include <linux/of_irq.h>
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#include <linux/pm_runtime.h>
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#include <linux/slab.h>
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#include <linux/soc/ti/knav_qmss.h>
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#include "knav_qmss.h"
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static struct knav_device *kdev;
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static DEFINE_MUTEX(knav_dev_lock);
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/* Queue manager register indices in DTS */
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#define KNAV_QUEUE_PEEK_REG_INDEX 0
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#define KNAV_QUEUE_STATUS_REG_INDEX 1
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#define KNAV_QUEUE_CONFIG_REG_INDEX 2
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#define KNAV_QUEUE_REGION_REG_INDEX 3
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#define KNAV_QUEUE_PUSH_REG_INDEX 4
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#define KNAV_QUEUE_POP_REG_INDEX 5
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/* Queue manager register indices in DTS for QMSS in K2G NAVSS.
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* There are no status and vbusm push registers on this version
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* of QMSS. Push registers are same as pop, So all indices above 1
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* are to be re-defined
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*/
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#define KNAV_L_QUEUE_CONFIG_REG_INDEX 1
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#define KNAV_L_QUEUE_REGION_REG_INDEX 2
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#define KNAV_L_QUEUE_PUSH_REG_INDEX 3
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/* PDSP register indices in DTS */
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#define KNAV_QUEUE_PDSP_IRAM_REG_INDEX 0
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#define KNAV_QUEUE_PDSP_REGS_REG_INDEX 1
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#define KNAV_QUEUE_PDSP_INTD_REG_INDEX 2
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#define KNAV_QUEUE_PDSP_CMD_REG_INDEX 3
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#define knav_queue_idx_to_inst(kdev, idx) \
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(kdev->instances + (idx << kdev->inst_shift))
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#define for_each_handle_rcu(qh, inst) \
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list_for_each_entry_rcu(qh, &inst->handles, list)
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#define for_each_instance(idx, inst, kdev) \
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for (idx = 0, inst = kdev->instances; \
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idx < (kdev)->num_queues_in_use; \
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idx++, inst = knav_queue_idx_to_inst(kdev, idx))
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/* All firmware file names end up here. List the firmware file names below.
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* Newest followed by older ones. Search is done from start of the array
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* until a firmware file is found.
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*/
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const char *knav_acc_firmwares[] = {"ks2_qmss_pdsp_acc48.bin"};
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static bool device_ready;
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bool knav_qmss_device_ready(void)
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{
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return device_ready;
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}
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EXPORT_SYMBOL_GPL(knav_qmss_device_ready);
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/**
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* knav_queue_notify: qmss queue notfier call
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*
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* @inst: qmss queue instance like accumulator
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*/
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void knav_queue_notify(struct knav_queue_inst *inst)
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{
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struct knav_queue *qh;
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if (!inst)
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return;
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rcu_read_lock();
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for_each_handle_rcu(qh, inst) {
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if (atomic_read(&qh->notifier_enabled) <= 0)
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continue;
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if (WARN_ON(!qh->notifier_fn))
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continue;
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this_cpu_inc(qh->stats->notifies);
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qh->notifier_fn(qh->notifier_fn_arg);
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}
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rcu_read_unlock();
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}
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EXPORT_SYMBOL_GPL(knav_queue_notify);
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static irqreturn_t knav_queue_int_handler(int irq, void *_instdata)
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{
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struct knav_queue_inst *inst = _instdata;
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knav_queue_notify(inst);
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return IRQ_HANDLED;
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}
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static int knav_queue_setup_irq(struct knav_range_info *range,
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struct knav_queue_inst *inst)
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{
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unsigned queue = inst->id - range->queue_base;
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int ret = 0, irq;
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if (range->flags & RANGE_HAS_IRQ) {
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irq = range->irqs[queue].irq;
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ret = request_irq(irq, knav_queue_int_handler, 0,
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inst->irq_name, inst);
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if (ret)
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return ret;
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disable_irq(irq);
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if (range->irqs[queue].cpu_mask) {
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ret = irq_set_affinity_hint(irq, range->irqs[queue].cpu_mask);
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if (ret) {
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dev_warn(range->kdev->dev,
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"Failed to set IRQ affinity\n");
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return ret;
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}
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}
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}
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return ret;
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}
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static void knav_queue_free_irq(struct knav_queue_inst *inst)
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{
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struct knav_range_info *range = inst->range;
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unsigned queue = inst->id - inst->range->queue_base;
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int irq;
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if (range->flags & RANGE_HAS_IRQ) {
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irq = range->irqs[queue].irq;
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irq_set_affinity_hint(irq, NULL);
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free_irq(irq, inst);
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}
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}
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static inline bool knav_queue_is_busy(struct knav_queue_inst *inst)
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{
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return !list_empty(&inst->handles);
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}
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static inline bool knav_queue_is_reserved(struct knav_queue_inst *inst)
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{
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return inst->range->flags & RANGE_RESERVED;
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}
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static inline bool knav_queue_is_shared(struct knav_queue_inst *inst)
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{
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struct knav_queue *tmp;
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rcu_read_lock();
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for_each_handle_rcu(tmp, inst) {
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if (tmp->flags & KNAV_QUEUE_SHARED) {
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rcu_read_unlock();
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return true;
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}
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}
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rcu_read_unlock();
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return false;
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}
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static inline bool knav_queue_match_type(struct knav_queue_inst *inst,
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unsigned type)
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{
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if ((type == KNAV_QUEUE_QPEND) &&
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(inst->range->flags & RANGE_HAS_IRQ)) {
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return true;
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} else if ((type == KNAV_QUEUE_ACC) &&
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(inst->range->flags & RANGE_HAS_ACCUMULATOR)) {
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return true;
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} else if ((type == KNAV_QUEUE_GP) &&
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!(inst->range->flags &
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(RANGE_HAS_ACCUMULATOR | RANGE_HAS_IRQ))) {
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return true;
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}
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return false;
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}
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static inline struct knav_queue_inst *
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knav_queue_match_id_to_inst(struct knav_device *kdev, unsigned id)
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{
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struct knav_queue_inst *inst;
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int idx;
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for_each_instance(idx, inst, kdev) {
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if (inst->id == id)
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return inst;
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}
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return NULL;
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}
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static inline struct knav_queue_inst *knav_queue_find_by_id(int id)
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{
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if (kdev->base_id <= id &&
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kdev->base_id + kdev->num_queues > id) {
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id -= kdev->base_id;
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return knav_queue_match_id_to_inst(kdev, id);
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}
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return NULL;
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}
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static struct knav_queue *__knav_queue_open(struct knav_queue_inst *inst,
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const char *name, unsigned flags)
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{
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struct knav_queue *qh;
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unsigned id;
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int ret = 0;
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qh = devm_kzalloc(inst->kdev->dev, sizeof(*qh), GFP_KERNEL);
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if (!qh)
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return ERR_PTR(-ENOMEM);
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qh->stats = alloc_percpu(struct knav_queue_stats);
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if (!qh->stats) {
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ret = -ENOMEM;
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goto err;
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}
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qh->flags = flags;
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qh->inst = inst;
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id = inst->id - inst->qmgr->start_queue;
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qh->reg_push = &inst->qmgr->reg_push[id];
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qh->reg_pop = &inst->qmgr->reg_pop[id];
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qh->reg_peek = &inst->qmgr->reg_peek[id];
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/* first opener? */
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if (!knav_queue_is_busy(inst)) {
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struct knav_range_info *range = inst->range;
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inst->name = kstrndup(name, KNAV_NAME_SIZE - 1, GFP_KERNEL);
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if (range->ops && range->ops->open_queue)
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ret = range->ops->open_queue(range, inst, flags);
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if (ret)
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goto err;
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}
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list_add_tail_rcu(&qh->list, &inst->handles);
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return qh;
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err:
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if (qh->stats)
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free_percpu(qh->stats);
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devm_kfree(inst->kdev->dev, qh);
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return ERR_PTR(ret);
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}
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static struct knav_queue *
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knav_queue_open_by_id(const char *name, unsigned id, unsigned flags)
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{
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struct knav_queue_inst *inst;
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struct knav_queue *qh;
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mutex_lock(&knav_dev_lock);
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qh = ERR_PTR(-ENODEV);
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inst = knav_queue_find_by_id(id);
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if (!inst)
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goto unlock_ret;
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qh = ERR_PTR(-EEXIST);
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if (!(flags & KNAV_QUEUE_SHARED) && knav_queue_is_busy(inst))
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goto unlock_ret;
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qh = ERR_PTR(-EBUSY);
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if ((flags & KNAV_QUEUE_SHARED) &&
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(knav_queue_is_busy(inst) && !knav_queue_is_shared(inst)))
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goto unlock_ret;
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qh = __knav_queue_open(inst, name, flags);
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unlock_ret:
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mutex_unlock(&knav_dev_lock);
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return qh;
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}
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static struct knav_queue *knav_queue_open_by_type(const char *name,
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unsigned type, unsigned flags)
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{
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struct knav_queue_inst *inst;
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struct knav_queue *qh = ERR_PTR(-EINVAL);
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int idx;
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mutex_lock(&knav_dev_lock);
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for_each_instance(idx, inst, kdev) {
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if (knav_queue_is_reserved(inst))
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continue;
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if (!knav_queue_match_type(inst, type))
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continue;
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if (knav_queue_is_busy(inst))
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continue;
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qh = __knav_queue_open(inst, name, flags);
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goto unlock_ret;
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}
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unlock_ret:
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mutex_unlock(&knav_dev_lock);
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return qh;
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}
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static void knav_queue_set_notify(struct knav_queue_inst *inst, bool enabled)
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{
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struct knav_range_info *range = inst->range;
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if (range->ops && range->ops->set_notify)
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range->ops->set_notify(range, inst, enabled);
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}
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static int knav_queue_enable_notifier(struct knav_queue *qh)
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{
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struct knav_queue_inst *inst = qh->inst;
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bool first;
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if (WARN_ON(!qh->notifier_fn))
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return -EINVAL;
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/* Adjust the per handle notifier count */
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first = (atomic_inc_return(&qh->notifier_enabled) == 1);
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if (!first)
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return 0; /* nothing to do */
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/* Now adjust the per instance notifier count */
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first = (atomic_inc_return(&inst->num_notifiers) == 1);
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if (first)
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knav_queue_set_notify(inst, true);
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return 0;
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}
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static int knav_queue_disable_notifier(struct knav_queue *qh)
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{
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struct knav_queue_inst *inst = qh->inst;
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bool last;
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last = (atomic_dec_return(&qh->notifier_enabled) == 0);
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if (!last)
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return 0; /* nothing to do */
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last = (atomic_dec_return(&inst->num_notifiers) == 0);
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if (last)
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knav_queue_set_notify(inst, false);
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return 0;
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}
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static int knav_queue_set_notifier(struct knav_queue *qh,
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struct knav_queue_notify_config *cfg)
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{
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knav_queue_notify_fn old_fn = qh->notifier_fn;
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if (!cfg)
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return -EINVAL;
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if (!(qh->inst->range->flags & (RANGE_HAS_ACCUMULATOR | RANGE_HAS_IRQ)))
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return -ENOTSUPP;
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if (!cfg->fn && old_fn)
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knav_queue_disable_notifier(qh);
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qh->notifier_fn = cfg->fn;
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qh->notifier_fn_arg = cfg->fn_arg;
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if (cfg->fn && !old_fn)
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knav_queue_enable_notifier(qh);
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return 0;
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}
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static int knav_gp_set_notify(struct knav_range_info *range,
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struct knav_queue_inst *inst,
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bool enabled)
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{
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unsigned queue;
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if (range->flags & RANGE_HAS_IRQ) {
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queue = inst->id - range->queue_base;
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if (enabled)
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enable_irq(range->irqs[queue].irq);
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else
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disable_irq_nosync(range->irqs[queue].irq);
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}
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return 0;
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}
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static int knav_gp_open_queue(struct knav_range_info *range,
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struct knav_queue_inst *inst, unsigned flags)
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{
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return knav_queue_setup_irq(range, inst);
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}
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static int knav_gp_close_queue(struct knav_range_info *range,
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struct knav_queue_inst *inst)
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{
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knav_queue_free_irq(inst);
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return 0;
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}
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struct knav_range_ops knav_gp_range_ops = {
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.set_notify = knav_gp_set_notify,
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.open_queue = knav_gp_open_queue,
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.close_queue = knav_gp_close_queue,
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};
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static int knav_queue_get_count(void *qhandle)
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{
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struct knav_queue *qh = qhandle;
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struct knav_queue_inst *inst = qh->inst;
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return readl_relaxed(&qh->reg_peek[0].entry_count) +
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atomic_read(&inst->desc_count);
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}
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static void knav_queue_debug_show_instance(struct seq_file *s,
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struct knav_queue_inst *inst)
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{
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struct knav_device *kdev = inst->kdev;
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struct knav_queue *qh;
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int cpu = 0;
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int pushes = 0;
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int pops = 0;
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int push_errors = 0;
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int pop_errors = 0;
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int notifies = 0;
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if (!knav_queue_is_busy(inst))
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return;
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seq_printf(s, "\tqueue id %d (%s)\n",
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kdev->base_id + inst->id, inst->name);
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for_each_handle_rcu(qh, inst) {
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for_each_possible_cpu(cpu) {
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pushes += per_cpu_ptr(qh->stats, cpu)->pushes;
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pops += per_cpu_ptr(qh->stats, cpu)->pops;
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push_errors += per_cpu_ptr(qh->stats, cpu)->push_errors;
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pop_errors += per_cpu_ptr(qh->stats, cpu)->pop_errors;
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notifies += per_cpu_ptr(qh->stats, cpu)->notifies;
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}
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seq_printf(s, "\t\thandle %p: pushes %8d, pops %8d, count %8d, notifies %8d, push errors %8d, pop errors %8d\n",
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qh,
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pushes,
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pops,
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knav_queue_get_count(qh),
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notifies,
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push_errors,
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pop_errors);
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}
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}
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static int knav_queue_debug_show(struct seq_file *s, void *v)
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{
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struct knav_queue_inst *inst;
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int idx;
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mutex_lock(&knav_dev_lock);
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seq_printf(s, "%s: %u-%u\n",
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dev_name(kdev->dev), kdev->base_id,
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kdev->base_id + kdev->num_queues - 1);
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for_each_instance(idx, inst, kdev)
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knav_queue_debug_show_instance(s, inst);
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mutex_unlock(&knav_dev_lock);
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return 0;
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}
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static int knav_queue_debug_open(struct inode *inode, struct file *file)
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{
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return single_open(file, knav_queue_debug_show, NULL);
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}
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static const struct file_operations knav_queue_debug_ops = {
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.open = knav_queue_debug_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
|
|
};
|
|
|
|
static inline int knav_queue_pdsp_wait(u32 * __iomem addr, unsigned timeout,
|
|
u32 flags)
|
|
{
|
|
unsigned long end;
|
|
u32 val = 0;
|
|
|
|
end = jiffies + msecs_to_jiffies(timeout);
|
|
while (time_after(end, jiffies)) {
|
|
val = readl_relaxed(addr);
|
|
if (flags)
|
|
val &= flags;
|
|
if (!val)
|
|
break;
|
|
cpu_relax();
|
|
}
|
|
return val ? -ETIMEDOUT : 0;
|
|
}
|
|
|
|
|
|
static int knav_queue_flush(struct knav_queue *qh)
|
|
{
|
|
struct knav_queue_inst *inst = qh->inst;
|
|
unsigned id = inst->id - inst->qmgr->start_queue;
|
|
|
|
atomic_set(&inst->desc_count, 0);
|
|
writel_relaxed(0, &inst->qmgr->reg_push[id].ptr_size_thresh);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* knav_queue_open() - open a hardware queue
|
|
* @name - name to give the queue handle
|
|
* @id - desired queue number if any or specifes the type
|
|
* of queue
|
|
* @flags - the following flags are applicable to queues:
|
|
* KNAV_QUEUE_SHARED - allow the queue to be shared. Queues are
|
|
* exclusive by default.
|
|
* Subsequent attempts to open a shared queue should
|
|
* also have this flag.
|
|
*
|
|
* Returns a handle to the open hardware queue if successful. Use IS_ERR()
|
|
* to check the returned value for error codes.
|
|
*/
|
|
void *knav_queue_open(const char *name, unsigned id,
|
|
unsigned flags)
|
|
{
|
|
struct knav_queue *qh = ERR_PTR(-EINVAL);
|
|
|
|
switch (id) {
|
|
case KNAV_QUEUE_QPEND:
|
|
case KNAV_QUEUE_ACC:
|
|
case KNAV_QUEUE_GP:
|
|
qh = knav_queue_open_by_type(name, id, flags);
|
|
break;
|
|
|
|
default:
|
|
qh = knav_queue_open_by_id(name, id, flags);
|
|
break;
|
|
}
|
|
return qh;
|
|
}
|
|
EXPORT_SYMBOL_GPL(knav_queue_open);
|
|
|
|
/**
|
|
* knav_queue_close() - close a hardware queue handle
|
|
* @qh - handle to close
|
|
*/
|
|
void knav_queue_close(void *qhandle)
|
|
{
|
|
struct knav_queue *qh = qhandle;
|
|
struct knav_queue_inst *inst = qh->inst;
|
|
|
|
while (atomic_read(&qh->notifier_enabled) > 0)
|
|
knav_queue_disable_notifier(qh);
|
|
|
|
mutex_lock(&knav_dev_lock);
|
|
list_del_rcu(&qh->list);
|
|
mutex_unlock(&knav_dev_lock);
|
|
synchronize_rcu();
|
|
if (!knav_queue_is_busy(inst)) {
|
|
struct knav_range_info *range = inst->range;
|
|
|
|
if (range->ops && range->ops->close_queue)
|
|
range->ops->close_queue(range, inst);
|
|
}
|
|
free_percpu(qh->stats);
|
|
devm_kfree(inst->kdev->dev, qh);
|
|
}
|
|
EXPORT_SYMBOL_GPL(knav_queue_close);
|
|
|
|
/**
|
|
* knav_queue_device_control() - Perform control operations on a queue
|
|
* @qh - queue handle
|
|
* @cmd - control commands
|
|
* @arg - command argument
|
|
*
|
|
* Returns 0 on success, errno otherwise.
|
|
*/
|
|
int knav_queue_device_control(void *qhandle, enum knav_queue_ctrl_cmd cmd,
|
|
unsigned long arg)
|
|
{
|
|
struct knav_queue *qh = qhandle;
|
|
struct knav_queue_notify_config *cfg;
|
|
int ret;
|
|
|
|
switch ((int)cmd) {
|
|
case KNAV_QUEUE_GET_ID:
|
|
ret = qh->inst->kdev->base_id + qh->inst->id;
|
|
break;
|
|
|
|
case KNAV_QUEUE_FLUSH:
|
|
ret = knav_queue_flush(qh);
|
|
break;
|
|
|
|
case KNAV_QUEUE_SET_NOTIFIER:
|
|
cfg = (void *)arg;
|
|
ret = knav_queue_set_notifier(qh, cfg);
|
|
break;
|
|
|
|
case KNAV_QUEUE_ENABLE_NOTIFY:
|
|
ret = knav_queue_enable_notifier(qh);
|
|
break;
|
|
|
|
case KNAV_QUEUE_DISABLE_NOTIFY:
|
|
ret = knav_queue_disable_notifier(qh);
|
|
break;
|
|
|
|
case KNAV_QUEUE_GET_COUNT:
|
|
ret = knav_queue_get_count(qh);
|
|
break;
|
|
|
|
default:
|
|
ret = -ENOTSUPP;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(knav_queue_device_control);
|
|
|
|
|
|
|
|
/**
|
|
* knav_queue_push() - push data (or descriptor) to the tail of a queue
|
|
* @qh - hardware queue handle
|
|
* @data - data to push
|
|
* @size - size of data to push
|
|
* @flags - can be used to pass additional information
|
|
*
|
|
* Returns 0 on success, errno otherwise.
|
|
*/
|
|
int knav_queue_push(void *qhandle, dma_addr_t dma,
|
|
unsigned size, unsigned flags)
|
|
{
|
|
struct knav_queue *qh = qhandle;
|
|
u32 val;
|
|
|
|
val = (u32)dma | ((size / 16) - 1);
|
|
writel_relaxed(val, &qh->reg_push[0].ptr_size_thresh);
|
|
|
|
this_cpu_inc(qh->stats->pushes);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(knav_queue_push);
|
|
|
|
/**
|
|
* knav_queue_pop() - pop data (or descriptor) from the head of a queue
|
|
* @qh - hardware queue handle
|
|
* @size - (optional) size of the data pop'ed.
|
|
*
|
|
* Returns a DMA address on success, 0 on failure.
|
|
*/
|
|
dma_addr_t knav_queue_pop(void *qhandle, unsigned *size)
|
|
{
|
|
struct knav_queue *qh = qhandle;
|
|
struct knav_queue_inst *inst = qh->inst;
|
|
dma_addr_t dma;
|
|
u32 val, idx;
|
|
|
|
/* are we accumulated? */
|
|
if (inst->descs) {
|
|
if (unlikely(atomic_dec_return(&inst->desc_count) < 0)) {
|
|
atomic_inc(&inst->desc_count);
|
|
return 0;
|
|
}
|
|
idx = atomic_inc_return(&inst->desc_head);
|
|
idx &= ACC_DESCS_MASK;
|
|
val = inst->descs[idx];
|
|
} else {
|
|
val = readl_relaxed(&qh->reg_pop[0].ptr_size_thresh);
|
|
if (unlikely(!val))
|
|
return 0;
|
|
}
|
|
|
|
dma = val & DESC_PTR_MASK;
|
|
if (size)
|
|
*size = ((val & DESC_SIZE_MASK) + 1) * 16;
|
|
|
|
this_cpu_inc(qh->stats->pops);
|
|
return dma;
|
|
}
|
|
EXPORT_SYMBOL_GPL(knav_queue_pop);
|
|
|
|
/* carve out descriptors and push into queue */
|
|
static void kdesc_fill_pool(struct knav_pool *pool)
|
|
{
|
|
struct knav_region *region;
|
|
int i;
|
|
|
|
region = pool->region;
|
|
pool->desc_size = region->desc_size;
|
|
for (i = 0; i < pool->num_desc; i++) {
|
|
int index = pool->region_offset + i;
|
|
dma_addr_t dma_addr;
|
|
unsigned dma_size;
|
|
dma_addr = region->dma_start + (region->desc_size * index);
|
|
dma_size = ALIGN(pool->desc_size, SMP_CACHE_BYTES);
|
|
dma_sync_single_for_device(pool->dev, dma_addr, dma_size,
|
|
DMA_TO_DEVICE);
|
|
knav_queue_push(pool->queue, dma_addr, dma_size, 0);
|
|
}
|
|
}
|
|
|
|
/* pop out descriptors and close the queue */
|
|
static void kdesc_empty_pool(struct knav_pool *pool)
|
|
{
|
|
dma_addr_t dma;
|
|
unsigned size;
|
|
void *desc;
|
|
int i;
|
|
|
|
if (!pool->queue)
|
|
return;
|
|
|
|
for (i = 0;; i++) {
|
|
dma = knav_queue_pop(pool->queue, &size);
|
|
if (!dma)
|
|
break;
|
|
desc = knav_pool_desc_dma_to_virt(pool, dma);
|
|
if (!desc) {
|
|
dev_dbg(pool->kdev->dev,
|
|
"couldn't unmap desc, continuing\n");
|
|
continue;
|
|
}
|
|
}
|
|
WARN_ON(i != pool->num_desc);
|
|
knav_queue_close(pool->queue);
|
|
}
|
|
|
|
|
|
/* Get the DMA address of a descriptor */
|
|
dma_addr_t knav_pool_desc_virt_to_dma(void *ph, void *virt)
|
|
{
|
|
struct knav_pool *pool = ph;
|
|
return pool->region->dma_start + (virt - pool->region->virt_start);
|
|
}
|
|
EXPORT_SYMBOL_GPL(knav_pool_desc_virt_to_dma);
|
|
|
|
void *knav_pool_desc_dma_to_virt(void *ph, dma_addr_t dma)
|
|
{
|
|
struct knav_pool *pool = ph;
|
|
return pool->region->virt_start + (dma - pool->region->dma_start);
|
|
}
|
|
EXPORT_SYMBOL_GPL(knav_pool_desc_dma_to_virt);
|
|
|
|
/**
|
|
* knav_pool_create() - Create a pool of descriptors
|
|
* @name - name to give the pool handle
|
|
* @num_desc - numbers of descriptors in the pool
|
|
* @region_id - QMSS region id from which the descriptors are to be
|
|
* allocated.
|
|
*
|
|
* Returns a pool handle on success.
|
|
* Use IS_ERR_OR_NULL() to identify error values on return.
|
|
*/
|
|
void *knav_pool_create(const char *name,
|
|
int num_desc, int region_id)
|
|
{
|
|
struct knav_region *reg_itr, *region = NULL;
|
|
struct knav_pool *pool, *pi;
|
|
struct list_head *node;
|
|
unsigned last_offset;
|
|
bool slot_found;
|
|
int ret;
|
|
|
|
if (!kdev)
|
|
return ERR_PTR(-EPROBE_DEFER);
|
|
|
|
if (!kdev->dev)
|
|
return ERR_PTR(-ENODEV);
|
|
|
|
pool = devm_kzalloc(kdev->dev, sizeof(*pool), GFP_KERNEL);
|
|
if (!pool) {
|
|
dev_err(kdev->dev, "out of memory allocating pool\n");
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
for_each_region(kdev, reg_itr) {
|
|
if (reg_itr->id != region_id)
|
|
continue;
|
|
region = reg_itr;
|
|
break;
|
|
}
|
|
|
|
if (!region) {
|
|
dev_err(kdev->dev, "region-id(%d) not found\n", region_id);
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
pool->queue = knav_queue_open(name, KNAV_QUEUE_GP, 0);
|
|
if (IS_ERR_OR_NULL(pool->queue)) {
|
|
dev_err(kdev->dev,
|
|
"failed to open queue for pool(%s), error %ld\n",
|
|
name, PTR_ERR(pool->queue));
|
|
ret = PTR_ERR(pool->queue);
|
|
goto err;
|
|
}
|
|
|
|
pool->name = kstrndup(name, KNAV_NAME_SIZE - 1, GFP_KERNEL);
|
|
pool->kdev = kdev;
|
|
pool->dev = kdev->dev;
|
|
|
|
mutex_lock(&knav_dev_lock);
|
|
|
|
if (num_desc > (region->num_desc - region->used_desc)) {
|
|
dev_err(kdev->dev, "out of descs in region(%d) for pool(%s)\n",
|
|
region_id, name);
|
|
ret = -ENOMEM;
|
|
goto err_unlock;
|
|
}
|
|
|
|
/* Region maintains a sorted (by region offset) list of pools
|
|
* use the first free slot which is large enough to accomodate
|
|
* the request
|
|
*/
|
|
last_offset = 0;
|
|
slot_found = false;
|
|
node = ®ion->pools;
|
|
list_for_each_entry(pi, ®ion->pools, region_inst) {
|
|
if ((pi->region_offset - last_offset) >= num_desc) {
|
|
slot_found = true;
|
|
break;
|
|
}
|
|
last_offset = pi->region_offset + pi->num_desc;
|
|
}
|
|
node = &pi->region_inst;
|
|
|
|
if (slot_found) {
|
|
pool->region = region;
|
|
pool->num_desc = num_desc;
|
|
pool->region_offset = last_offset;
|
|
region->used_desc += num_desc;
|
|
list_add_tail(&pool->list, &kdev->pools);
|
|
list_add_tail(&pool->region_inst, node);
|
|
} else {
|
|
dev_err(kdev->dev, "pool(%s) create failed: fragmented desc pool in region(%d)\n",
|
|
name, region_id);
|
|
ret = -ENOMEM;
|
|
goto err_unlock;
|
|
}
|
|
|
|
mutex_unlock(&knav_dev_lock);
|
|
kdesc_fill_pool(pool);
|
|
return pool;
|
|
|
|
err_unlock:
|
|
mutex_unlock(&knav_dev_lock);
|
|
err:
|
|
kfree(pool->name);
|
|
devm_kfree(kdev->dev, pool);
|
|
return ERR_PTR(ret);
|
|
}
|
|
EXPORT_SYMBOL_GPL(knav_pool_create);
|
|
|
|
/**
|
|
* knav_pool_destroy() - Free a pool of descriptors
|
|
* @pool - pool handle
|
|
*/
|
|
void knav_pool_destroy(void *ph)
|
|
{
|
|
struct knav_pool *pool = ph;
|
|
|
|
if (!pool)
|
|
return;
|
|
|
|
if (!pool->region)
|
|
return;
|
|
|
|
kdesc_empty_pool(pool);
|
|
mutex_lock(&knav_dev_lock);
|
|
|
|
pool->region->used_desc -= pool->num_desc;
|
|
list_del(&pool->region_inst);
|
|
list_del(&pool->list);
|
|
|
|
mutex_unlock(&knav_dev_lock);
|
|
kfree(pool->name);
|
|
devm_kfree(kdev->dev, pool);
|
|
}
|
|
EXPORT_SYMBOL_GPL(knav_pool_destroy);
|
|
|
|
|
|
/**
|
|
* knav_pool_desc_get() - Get a descriptor from the pool
|
|
* @pool - pool handle
|
|
*
|
|
* Returns descriptor from the pool.
|
|
*/
|
|
void *knav_pool_desc_get(void *ph)
|
|
{
|
|
struct knav_pool *pool = ph;
|
|
dma_addr_t dma;
|
|
unsigned size;
|
|
void *data;
|
|
|
|
dma = knav_queue_pop(pool->queue, &size);
|
|
if (unlikely(!dma))
|
|
return ERR_PTR(-ENOMEM);
|
|
data = knav_pool_desc_dma_to_virt(pool, dma);
|
|
return data;
|
|
}
|
|
EXPORT_SYMBOL_GPL(knav_pool_desc_get);
|
|
|
|
/**
|
|
* knav_pool_desc_put() - return a descriptor to the pool
|
|
* @pool - pool handle
|
|
*/
|
|
void knav_pool_desc_put(void *ph, void *desc)
|
|
{
|
|
struct knav_pool *pool = ph;
|
|
dma_addr_t dma;
|
|
dma = knav_pool_desc_virt_to_dma(pool, desc);
|
|
knav_queue_push(pool->queue, dma, pool->region->desc_size, 0);
|
|
}
|
|
EXPORT_SYMBOL_GPL(knav_pool_desc_put);
|
|
|
|
/**
|
|
* knav_pool_desc_map() - Map descriptor for DMA transfer
|
|
* @pool - pool handle
|
|
* @desc - address of descriptor to map
|
|
* @size - size of descriptor to map
|
|
* @dma - DMA address return pointer
|
|
* @dma_sz - adjusted return pointer
|
|
*
|
|
* Returns 0 on success, errno otherwise.
|
|
*/
|
|
int knav_pool_desc_map(void *ph, void *desc, unsigned size,
|
|
dma_addr_t *dma, unsigned *dma_sz)
|
|
{
|
|
struct knav_pool *pool = ph;
|
|
*dma = knav_pool_desc_virt_to_dma(pool, desc);
|
|
size = min(size, pool->region->desc_size);
|
|
size = ALIGN(size, SMP_CACHE_BYTES);
|
|
*dma_sz = size;
|
|
dma_sync_single_for_device(pool->dev, *dma, size, DMA_TO_DEVICE);
|
|
|
|
/* Ensure the descriptor reaches to the memory */
|
|
__iowmb();
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(knav_pool_desc_map);
|
|
|
|
/**
|
|
* knav_pool_desc_unmap() - Unmap descriptor after DMA transfer
|
|
* @pool - pool handle
|
|
* @dma - DMA address of descriptor to unmap
|
|
* @dma_sz - size of descriptor to unmap
|
|
*
|
|
* Returns descriptor address on success, Use IS_ERR_OR_NULL() to identify
|
|
* error values on return.
|
|
*/
|
|
void *knav_pool_desc_unmap(void *ph, dma_addr_t dma, unsigned dma_sz)
|
|
{
|
|
struct knav_pool *pool = ph;
|
|
unsigned desc_sz;
|
|
void *desc;
|
|
|
|
desc_sz = min(dma_sz, pool->region->desc_size);
|
|
desc = knav_pool_desc_dma_to_virt(pool, dma);
|
|
dma_sync_single_for_cpu(pool->dev, dma, desc_sz, DMA_FROM_DEVICE);
|
|
prefetch(desc);
|
|
return desc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(knav_pool_desc_unmap);
|
|
|
|
/**
|
|
* knav_pool_count() - Get the number of descriptors in pool.
|
|
* @pool - pool handle
|
|
* Returns number of elements in the pool.
|
|
*/
|
|
int knav_pool_count(void *ph)
|
|
{
|
|
struct knav_pool *pool = ph;
|
|
return knav_queue_get_count(pool->queue);
|
|
}
|
|
EXPORT_SYMBOL_GPL(knav_pool_count);
|
|
|
|
static void knav_queue_setup_region(struct knav_device *kdev,
|
|
struct knav_region *region)
|
|
{
|
|
unsigned hw_num_desc, hw_desc_size, size;
|
|
struct knav_reg_region __iomem *regs;
|
|
struct knav_qmgr_info *qmgr;
|
|
struct knav_pool *pool;
|
|
int id = region->id;
|
|
struct page *page;
|
|
|
|
/* unused region? */
|
|
if (!region->num_desc) {
|
|
dev_warn(kdev->dev, "unused region %s\n", region->name);
|
|
return;
|
|
}
|
|
|
|
/* get hardware descriptor value */
|
|
hw_num_desc = ilog2(region->num_desc - 1) + 1;
|
|
|
|
/* did we force fit ourselves into nothingness? */
|
|
if (region->num_desc < 32) {
|
|
region->num_desc = 0;
|
|
dev_warn(kdev->dev, "too few descriptors in region %s\n",
|
|
region->name);
|
|
return;
|
|
}
|
|
|
|
size = region->num_desc * region->desc_size;
|
|
region->virt_start = alloc_pages_exact(size, GFP_KERNEL | GFP_DMA |
|
|
GFP_DMA32);
|
|
if (!region->virt_start) {
|
|
region->num_desc = 0;
|
|
dev_err(kdev->dev, "memory alloc failed for region %s\n",
|
|
region->name);
|
|
return;
|
|
}
|
|
region->virt_end = region->virt_start + size;
|
|
page = virt_to_page(region->virt_start);
|
|
|
|
region->dma_start = dma_map_page(kdev->dev, page, 0, size,
|
|
DMA_BIDIRECTIONAL);
|
|
if (dma_mapping_error(kdev->dev, region->dma_start)) {
|
|
dev_err(kdev->dev, "dma map failed for region %s\n",
|
|
region->name);
|
|
goto fail;
|
|
}
|
|
region->dma_end = region->dma_start + size;
|
|
|
|
pool = devm_kzalloc(kdev->dev, sizeof(*pool), GFP_KERNEL);
|
|
if (!pool) {
|
|
dev_err(kdev->dev, "out of memory allocating dummy pool\n");
|
|
goto fail;
|
|
}
|
|
pool->num_desc = 0;
|
|
pool->region_offset = region->num_desc;
|
|
list_add(&pool->region_inst, ®ion->pools);
|
|
|
|
dev_dbg(kdev->dev,
|
|
"region %s (%d): size:%d, link:%d@%d, dma:%pad-%pad, virt:%p-%p\n",
|
|
region->name, id, region->desc_size, region->num_desc,
|
|
region->link_index, ®ion->dma_start, ®ion->dma_end,
|
|
region->virt_start, region->virt_end);
|
|
|
|
hw_desc_size = (region->desc_size / 16) - 1;
|
|
hw_num_desc -= 5;
|
|
|
|
for_each_qmgr(kdev, qmgr) {
|
|
regs = qmgr->reg_region + id;
|
|
writel_relaxed((u32)region->dma_start, ®s->base);
|
|
writel_relaxed(region->link_index, ®s->start_index);
|
|
writel_relaxed(hw_desc_size << 16 | hw_num_desc,
|
|
®s->size_count);
|
|
}
|
|
return;
|
|
|
|
fail:
|
|
if (region->dma_start)
|
|
dma_unmap_page(kdev->dev, region->dma_start, size,
|
|
DMA_BIDIRECTIONAL);
|
|
if (region->virt_start)
|
|
free_pages_exact(region->virt_start, size);
|
|
region->num_desc = 0;
|
|
return;
|
|
}
|
|
|
|
static const char *knav_queue_find_name(struct device_node *node)
|
|
{
|
|
const char *name;
|
|
|
|
if (of_property_read_string(node, "label", &name) < 0)
|
|
name = node->name;
|
|
if (!name)
|
|
name = "unknown";
|
|
return name;
|
|
}
|
|
|
|
static int knav_queue_setup_regions(struct knav_device *kdev,
|
|
struct device_node *regions)
|
|
{
|
|
struct device *dev = kdev->dev;
|
|
struct knav_region *region;
|
|
struct device_node *child;
|
|
u32 temp[2];
|
|
int ret;
|
|
|
|
for_each_child_of_node(regions, child) {
|
|
region = devm_kzalloc(dev, sizeof(*region), GFP_KERNEL);
|
|
if (!region) {
|
|
dev_err(dev, "out of memory allocating region\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
region->name = knav_queue_find_name(child);
|
|
of_property_read_u32(child, "id", ®ion->id);
|
|
ret = of_property_read_u32_array(child, "region-spec", temp, 2);
|
|
if (!ret) {
|
|
region->num_desc = temp[0];
|
|
region->desc_size = temp[1];
|
|
} else {
|
|
dev_err(dev, "invalid region info %s\n", region->name);
|
|
devm_kfree(dev, region);
|
|
continue;
|
|
}
|
|
|
|
if (!of_get_property(child, "link-index", NULL)) {
|
|
dev_err(dev, "No link info for %s\n", region->name);
|
|
devm_kfree(dev, region);
|
|
continue;
|
|
}
|
|
ret = of_property_read_u32(child, "link-index",
|
|
®ion->link_index);
|
|
if (ret) {
|
|
dev_err(dev, "link index not found for %s\n",
|
|
region->name);
|
|
devm_kfree(dev, region);
|
|
continue;
|
|
}
|
|
|
|
INIT_LIST_HEAD(®ion->pools);
|
|
list_add_tail(®ion->list, &kdev->regions);
|
|
}
|
|
if (list_empty(&kdev->regions)) {
|
|
dev_err(dev, "no valid region information found\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Next, we run through the regions and set things up */
|
|
for_each_region(kdev, region)
|
|
knav_queue_setup_region(kdev, region);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int knav_get_link_ram(struct knav_device *kdev,
|
|
const char *name,
|
|
struct knav_link_ram_block *block)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(kdev->dev);
|
|
struct device_node *node = pdev->dev.of_node;
|
|
u32 temp[2];
|
|
|
|
/*
|
|
* Note: link ram resources are specified in "entry" sized units. In
|
|
* reality, although entries are ~40bits in hardware, we treat them as
|
|
* 64-bit entities here.
|
|
*
|
|
* For example, to specify the internal link ram for Keystone-I class
|
|
* devices, we would set the linkram0 resource to 0x80000-0x83fff.
|
|
*
|
|
* This gets a bit weird when other link rams are used. For example,
|
|
* if the range specified is 0x0c000000-0x0c003fff (i.e., 16K entries
|
|
* in MSMC SRAM), the actual memory used is 0x0c000000-0x0c020000,
|
|
* which accounts for 64-bits per entry, for 16K entries.
|
|
*/
|
|
if (!of_property_read_u32_array(node, name , temp, 2)) {
|
|
if (temp[0]) {
|
|
/*
|
|
* queue_base specified => using internal or onchip
|
|
* link ram WARNING - we do not "reserve" this block
|
|
*/
|
|
block->dma = (dma_addr_t)temp[0];
|
|
block->virt = NULL;
|
|
block->size = temp[1];
|
|
} else {
|
|
block->size = temp[1];
|
|
/* queue_base not specific => allocate requested size */
|
|
block->virt = dmam_alloc_coherent(kdev->dev,
|
|
8 * block->size, &block->dma,
|
|
GFP_KERNEL);
|
|
if (!block->virt) {
|
|
dev_err(kdev->dev, "failed to alloc linkram\n");
|
|
return -ENOMEM;
|
|
}
|
|
}
|
|
} else {
|
|
return -ENODEV;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int knav_queue_setup_link_ram(struct knav_device *kdev)
|
|
{
|
|
struct knav_link_ram_block *block;
|
|
struct knav_qmgr_info *qmgr;
|
|
|
|
for_each_qmgr(kdev, qmgr) {
|
|
block = &kdev->link_rams[0];
|
|
dev_dbg(kdev->dev, "linkram0: dma:%pad, virt:%p, size:%x\n",
|
|
&block->dma, block->virt, block->size);
|
|
writel_relaxed((u32)block->dma, &qmgr->reg_config->link_ram_base0);
|
|
if (kdev->version == QMSS_66AK2G)
|
|
writel_relaxed(block->size,
|
|
&qmgr->reg_config->link_ram_size0);
|
|
else
|
|
writel_relaxed(block->size - 1,
|
|
&qmgr->reg_config->link_ram_size0);
|
|
block++;
|
|
if (!block->size)
|
|
continue;
|
|
|
|
dev_dbg(kdev->dev, "linkram1: dma:%pad, virt:%p, size:%x\n",
|
|
&block->dma, block->virt, block->size);
|
|
writel_relaxed(block->dma, &qmgr->reg_config->link_ram_base1);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int knav_setup_queue_range(struct knav_device *kdev,
|
|
struct device_node *node)
|
|
{
|
|
struct device *dev = kdev->dev;
|
|
struct knav_range_info *range;
|
|
struct knav_qmgr_info *qmgr;
|
|
u32 temp[2], start, end, id, index;
|
|
int ret, i;
|
|
|
|
range = devm_kzalloc(dev, sizeof(*range), GFP_KERNEL);
|
|
if (!range) {
|
|
dev_err(dev, "out of memory allocating range\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
range->kdev = kdev;
|
|
range->name = knav_queue_find_name(node);
|
|
ret = of_property_read_u32_array(node, "qrange", temp, 2);
|
|
if (!ret) {
|
|
range->queue_base = temp[0] - kdev->base_id;
|
|
range->num_queues = temp[1];
|
|
} else {
|
|
dev_err(dev, "invalid queue range %s\n", range->name);
|
|
devm_kfree(dev, range);
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (i = 0; i < RANGE_MAX_IRQS; i++) {
|
|
struct of_phandle_args oirq;
|
|
|
|
if (of_irq_parse_one(node, i, &oirq))
|
|
break;
|
|
|
|
range->irqs[i].irq = irq_create_of_mapping(&oirq);
|
|
if (range->irqs[i].irq == IRQ_NONE)
|
|
break;
|
|
|
|
range->num_irqs++;
|
|
|
|
if (IS_ENABLED(CONFIG_SMP) && oirq.args_count == 3) {
|
|
unsigned long mask;
|
|
int bit;
|
|
|
|
range->irqs[i].cpu_mask = devm_kzalloc(dev,
|
|
cpumask_size(), GFP_KERNEL);
|
|
if (!range->irqs[i].cpu_mask)
|
|
return -ENOMEM;
|
|
|
|
mask = (oirq.args[2] & 0x0000ff00) >> 8;
|
|
for_each_set_bit(bit, &mask, BITS_PER_LONG)
|
|
cpumask_set_cpu(bit, range->irqs[i].cpu_mask);
|
|
}
|
|
}
|
|
|
|
range->num_irqs = min(range->num_irqs, range->num_queues);
|
|
if (range->num_irqs)
|
|
range->flags |= RANGE_HAS_IRQ;
|
|
|
|
if (of_get_property(node, "qalloc-by-id", NULL))
|
|
range->flags |= RANGE_RESERVED;
|
|
|
|
if (of_get_property(node, "accumulator", NULL)) {
|
|
ret = knav_init_acc_range(kdev, node, range);
|
|
if (ret < 0) {
|
|
devm_kfree(dev, range);
|
|
return ret;
|
|
}
|
|
} else {
|
|
range->ops = &knav_gp_range_ops;
|
|
}
|
|
|
|
/* set threshold to 1, and flush out the queues */
|
|
for_each_qmgr(kdev, qmgr) {
|
|
start = max(qmgr->start_queue, range->queue_base);
|
|
end = min(qmgr->start_queue + qmgr->num_queues,
|
|
range->queue_base + range->num_queues);
|
|
for (id = start; id < end; id++) {
|
|
index = id - qmgr->start_queue;
|
|
writel_relaxed(THRESH_GTE | 1,
|
|
&qmgr->reg_peek[index].ptr_size_thresh);
|
|
writel_relaxed(0,
|
|
&qmgr->reg_push[index].ptr_size_thresh);
|
|
}
|
|
}
|
|
|
|
list_add_tail(&range->list, &kdev->queue_ranges);
|
|
dev_dbg(dev, "added range %s: %d-%d, %d irqs%s%s%s\n",
|
|
range->name, range->queue_base,
|
|
range->queue_base + range->num_queues - 1,
|
|
range->num_irqs,
|
|
(range->flags & RANGE_HAS_IRQ) ? ", has irq" : "",
|
|
(range->flags & RANGE_RESERVED) ? ", reserved" : "",
|
|
(range->flags & RANGE_HAS_ACCUMULATOR) ? ", acc" : "");
|
|
kdev->num_queues_in_use += range->num_queues;
|
|
return 0;
|
|
}
|
|
|
|
static int knav_setup_queue_pools(struct knav_device *kdev,
|
|
struct device_node *queue_pools)
|
|
{
|
|
struct device_node *type, *range;
|
|
int ret;
|
|
|
|
for_each_child_of_node(queue_pools, type) {
|
|
for_each_child_of_node(type, range) {
|
|
ret = knav_setup_queue_range(kdev, range);
|
|
/* return value ignored, we init the rest... */
|
|
}
|
|
}
|
|
|
|
/* ... and barf if they all failed! */
|
|
if (list_empty(&kdev->queue_ranges)) {
|
|
dev_err(kdev->dev, "no valid queue range found\n");
|
|
return -ENODEV;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void knav_free_queue_range(struct knav_device *kdev,
|
|
struct knav_range_info *range)
|
|
{
|
|
if (range->ops && range->ops->free_range)
|
|
range->ops->free_range(range);
|
|
list_del(&range->list);
|
|
devm_kfree(kdev->dev, range);
|
|
}
|
|
|
|
static void knav_free_queue_ranges(struct knav_device *kdev)
|
|
{
|
|
struct knav_range_info *range;
|
|
|
|
for (;;) {
|
|
range = first_queue_range(kdev);
|
|
if (!range)
|
|
break;
|
|
knav_free_queue_range(kdev, range);
|
|
}
|
|
}
|
|
|
|
static void knav_queue_free_regions(struct knav_device *kdev)
|
|
{
|
|
struct knav_region *region;
|
|
struct knav_pool *pool, *tmp;
|
|
unsigned size;
|
|
|
|
for (;;) {
|
|
region = first_region(kdev);
|
|
if (!region)
|
|
break;
|
|
list_for_each_entry_safe(pool, tmp, ®ion->pools, region_inst)
|
|
knav_pool_destroy(pool);
|
|
|
|
size = region->virt_end - region->virt_start;
|
|
if (size)
|
|
free_pages_exact(region->virt_start, size);
|
|
list_del(®ion->list);
|
|
devm_kfree(kdev->dev, region);
|
|
}
|
|
}
|
|
|
|
static void __iomem *knav_queue_map_reg(struct knav_device *kdev,
|
|
struct device_node *node, int index)
|
|
{
|
|
struct resource res;
|
|
void __iomem *regs;
|
|
int ret;
|
|
|
|
ret = of_address_to_resource(node, index, &res);
|
|
if (ret) {
|
|
dev_err(kdev->dev, "Can't translate of node(%pOFn) address for index(%d)\n",
|
|
node, index);
|
|
return ERR_PTR(ret);
|
|
}
|
|
|
|
regs = devm_ioremap_resource(kdev->dev, &res);
|
|
if (IS_ERR(regs))
|
|
dev_err(kdev->dev, "Failed to map register base for index(%d) node(%pOFn)\n",
|
|
index, node);
|
|
return regs;
|
|
}
|
|
|
|
static int knav_queue_init_qmgrs(struct knav_device *kdev,
|
|
struct device_node *qmgrs)
|
|
{
|
|
struct device *dev = kdev->dev;
|
|
struct knav_qmgr_info *qmgr;
|
|
struct device_node *child;
|
|
u32 temp[2];
|
|
int ret;
|
|
|
|
for_each_child_of_node(qmgrs, child) {
|
|
qmgr = devm_kzalloc(dev, sizeof(*qmgr), GFP_KERNEL);
|
|
if (!qmgr) {
|
|
dev_err(dev, "out of memory allocating qmgr\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ret = of_property_read_u32_array(child, "managed-queues",
|
|
temp, 2);
|
|
if (!ret) {
|
|
qmgr->start_queue = temp[0];
|
|
qmgr->num_queues = temp[1];
|
|
} else {
|
|
dev_err(dev, "invalid qmgr queue range\n");
|
|
devm_kfree(dev, qmgr);
|
|
continue;
|
|
}
|
|
|
|
dev_info(dev, "qmgr start queue %d, number of queues %d\n",
|
|
qmgr->start_queue, qmgr->num_queues);
|
|
|
|
qmgr->reg_peek =
|
|
knav_queue_map_reg(kdev, child,
|
|
KNAV_QUEUE_PEEK_REG_INDEX);
|
|
|
|
if (kdev->version == QMSS) {
|
|
qmgr->reg_status =
|
|
knav_queue_map_reg(kdev, child,
|
|
KNAV_QUEUE_STATUS_REG_INDEX);
|
|
}
|
|
|
|
qmgr->reg_config =
|
|
knav_queue_map_reg(kdev, child,
|
|
(kdev->version == QMSS_66AK2G) ?
|
|
KNAV_L_QUEUE_CONFIG_REG_INDEX :
|
|
KNAV_QUEUE_CONFIG_REG_INDEX);
|
|
qmgr->reg_region =
|
|
knav_queue_map_reg(kdev, child,
|
|
(kdev->version == QMSS_66AK2G) ?
|
|
KNAV_L_QUEUE_REGION_REG_INDEX :
|
|
KNAV_QUEUE_REGION_REG_INDEX);
|
|
|
|
qmgr->reg_push =
|
|
knav_queue_map_reg(kdev, child,
|
|
(kdev->version == QMSS_66AK2G) ?
|
|
KNAV_L_QUEUE_PUSH_REG_INDEX :
|
|
KNAV_QUEUE_PUSH_REG_INDEX);
|
|
|
|
if (kdev->version == QMSS) {
|
|
qmgr->reg_pop =
|
|
knav_queue_map_reg(kdev, child,
|
|
KNAV_QUEUE_POP_REG_INDEX);
|
|
}
|
|
|
|
if (IS_ERR(qmgr->reg_peek) ||
|
|
((kdev->version == QMSS) &&
|
|
(IS_ERR(qmgr->reg_status) || IS_ERR(qmgr->reg_pop))) ||
|
|
IS_ERR(qmgr->reg_config) || IS_ERR(qmgr->reg_region) ||
|
|
IS_ERR(qmgr->reg_push)) {
|
|
dev_err(dev, "failed to map qmgr regs\n");
|
|
if (kdev->version == QMSS) {
|
|
if (!IS_ERR(qmgr->reg_status))
|
|
devm_iounmap(dev, qmgr->reg_status);
|
|
if (!IS_ERR(qmgr->reg_pop))
|
|
devm_iounmap(dev, qmgr->reg_pop);
|
|
}
|
|
if (!IS_ERR(qmgr->reg_peek))
|
|
devm_iounmap(dev, qmgr->reg_peek);
|
|
if (!IS_ERR(qmgr->reg_config))
|
|
devm_iounmap(dev, qmgr->reg_config);
|
|
if (!IS_ERR(qmgr->reg_region))
|
|
devm_iounmap(dev, qmgr->reg_region);
|
|
if (!IS_ERR(qmgr->reg_push))
|
|
devm_iounmap(dev, qmgr->reg_push);
|
|
devm_kfree(dev, qmgr);
|
|
continue;
|
|
}
|
|
|
|
/* Use same push register for pop as well */
|
|
if (kdev->version == QMSS_66AK2G)
|
|
qmgr->reg_pop = qmgr->reg_push;
|
|
|
|
list_add_tail(&qmgr->list, &kdev->qmgrs);
|
|
dev_info(dev, "added qmgr start queue %d, num of queues %d, reg_peek %p, reg_status %p, reg_config %p, reg_region %p, reg_push %p, reg_pop %p\n",
|
|
qmgr->start_queue, qmgr->num_queues,
|
|
qmgr->reg_peek, qmgr->reg_status,
|
|
qmgr->reg_config, qmgr->reg_region,
|
|
qmgr->reg_push, qmgr->reg_pop);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int knav_queue_init_pdsps(struct knav_device *kdev,
|
|
struct device_node *pdsps)
|
|
{
|
|
struct device *dev = kdev->dev;
|
|
struct knav_pdsp_info *pdsp;
|
|
struct device_node *child;
|
|
|
|
for_each_child_of_node(pdsps, child) {
|
|
pdsp = devm_kzalloc(dev, sizeof(*pdsp), GFP_KERNEL);
|
|
if (!pdsp) {
|
|
dev_err(dev, "out of memory allocating pdsp\n");
|
|
return -ENOMEM;
|
|
}
|
|
pdsp->name = knav_queue_find_name(child);
|
|
pdsp->iram =
|
|
knav_queue_map_reg(kdev, child,
|
|
KNAV_QUEUE_PDSP_IRAM_REG_INDEX);
|
|
pdsp->regs =
|
|
knav_queue_map_reg(kdev, child,
|
|
KNAV_QUEUE_PDSP_REGS_REG_INDEX);
|
|
pdsp->intd =
|
|
knav_queue_map_reg(kdev, child,
|
|
KNAV_QUEUE_PDSP_INTD_REG_INDEX);
|
|
pdsp->command =
|
|
knav_queue_map_reg(kdev, child,
|
|
KNAV_QUEUE_PDSP_CMD_REG_INDEX);
|
|
|
|
if (IS_ERR(pdsp->command) || IS_ERR(pdsp->iram) ||
|
|
IS_ERR(pdsp->regs) || IS_ERR(pdsp->intd)) {
|
|
dev_err(dev, "failed to map pdsp %s regs\n",
|
|
pdsp->name);
|
|
if (!IS_ERR(pdsp->command))
|
|
devm_iounmap(dev, pdsp->command);
|
|
if (!IS_ERR(pdsp->iram))
|
|
devm_iounmap(dev, pdsp->iram);
|
|
if (!IS_ERR(pdsp->regs))
|
|
devm_iounmap(dev, pdsp->regs);
|
|
if (!IS_ERR(pdsp->intd))
|
|
devm_iounmap(dev, pdsp->intd);
|
|
devm_kfree(dev, pdsp);
|
|
continue;
|
|
}
|
|
of_property_read_u32(child, "id", &pdsp->id);
|
|
list_add_tail(&pdsp->list, &kdev->pdsps);
|
|
dev_dbg(dev, "added pdsp %s: command %p, iram %p, regs %p, intd %p\n",
|
|
pdsp->name, pdsp->command, pdsp->iram, pdsp->regs,
|
|
pdsp->intd);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int knav_queue_stop_pdsp(struct knav_device *kdev,
|
|
struct knav_pdsp_info *pdsp)
|
|
{
|
|
u32 val, timeout = 1000;
|
|
int ret;
|
|
|
|
val = readl_relaxed(&pdsp->regs->control) & ~PDSP_CTRL_ENABLE;
|
|
writel_relaxed(val, &pdsp->regs->control);
|
|
ret = knav_queue_pdsp_wait(&pdsp->regs->control, timeout,
|
|
PDSP_CTRL_RUNNING);
|
|
if (ret < 0) {
|
|
dev_err(kdev->dev, "timed out on pdsp %s stop\n", pdsp->name);
|
|
return ret;
|
|
}
|
|
pdsp->loaded = false;
|
|
pdsp->started = false;
|
|
return 0;
|
|
}
|
|
|
|
static int knav_queue_load_pdsp(struct knav_device *kdev,
|
|
struct knav_pdsp_info *pdsp)
|
|
{
|
|
int i, ret, fwlen;
|
|
const struct firmware *fw;
|
|
bool found = false;
|
|
u32 *fwdata;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(knav_acc_firmwares); i++) {
|
|
if (knav_acc_firmwares[i]) {
|
|
ret = request_firmware_direct(&fw,
|
|
knav_acc_firmwares[i],
|
|
kdev->dev);
|
|
if (!ret) {
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!found) {
|
|
dev_err(kdev->dev, "failed to get firmware for pdsp\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
dev_info(kdev->dev, "firmware file %s downloaded for PDSP\n",
|
|
knav_acc_firmwares[i]);
|
|
|
|
writel_relaxed(pdsp->id + 1, pdsp->command + 0x18);
|
|
/* download the firmware */
|
|
fwdata = (u32 *)fw->data;
|
|
fwlen = (fw->size + sizeof(u32) - 1) / sizeof(u32);
|
|
for (i = 0; i < fwlen; i++)
|
|
writel_relaxed(be32_to_cpu(fwdata[i]), pdsp->iram + i);
|
|
|
|
release_firmware(fw);
|
|
return 0;
|
|
}
|
|
|
|
static int knav_queue_start_pdsp(struct knav_device *kdev,
|
|
struct knav_pdsp_info *pdsp)
|
|
{
|
|
u32 val, timeout = 1000;
|
|
int ret;
|
|
|
|
/* write a command for sync */
|
|
writel_relaxed(0xffffffff, pdsp->command);
|
|
while (readl_relaxed(pdsp->command) != 0xffffffff)
|
|
cpu_relax();
|
|
|
|
/* soft reset the PDSP */
|
|
val = readl_relaxed(&pdsp->regs->control);
|
|
val &= ~(PDSP_CTRL_PC_MASK | PDSP_CTRL_SOFT_RESET);
|
|
writel_relaxed(val, &pdsp->regs->control);
|
|
|
|
/* enable pdsp */
|
|
val = readl_relaxed(&pdsp->regs->control) | PDSP_CTRL_ENABLE;
|
|
writel_relaxed(val, &pdsp->regs->control);
|
|
|
|
/* wait for command register to clear */
|
|
ret = knav_queue_pdsp_wait(pdsp->command, timeout, 0);
|
|
if (ret < 0) {
|
|
dev_err(kdev->dev,
|
|
"timed out on pdsp %s command register wait\n",
|
|
pdsp->name);
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void knav_queue_stop_pdsps(struct knav_device *kdev)
|
|
{
|
|
struct knav_pdsp_info *pdsp;
|
|
|
|
/* disable all pdsps */
|
|
for_each_pdsp(kdev, pdsp)
|
|
knav_queue_stop_pdsp(kdev, pdsp);
|
|
}
|
|
|
|
static int knav_queue_start_pdsps(struct knav_device *kdev)
|
|
{
|
|
struct knav_pdsp_info *pdsp;
|
|
int ret;
|
|
|
|
knav_queue_stop_pdsps(kdev);
|
|
/* now load them all. We return success even if pdsp
|
|
* is not loaded as acc channels are optional on having
|
|
* firmware availability in the system. We set the loaded
|
|
* and stated flag and when initialize the acc range, check
|
|
* it and init the range only if pdsp is started.
|
|
*/
|
|
for_each_pdsp(kdev, pdsp) {
|
|
ret = knav_queue_load_pdsp(kdev, pdsp);
|
|
if (!ret)
|
|
pdsp->loaded = true;
|
|
}
|
|
|
|
for_each_pdsp(kdev, pdsp) {
|
|
if (pdsp->loaded) {
|
|
ret = knav_queue_start_pdsp(kdev, pdsp);
|
|
if (!ret)
|
|
pdsp->started = true;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline struct knav_qmgr_info *knav_find_qmgr(unsigned id)
|
|
{
|
|
struct knav_qmgr_info *qmgr;
|
|
|
|
for_each_qmgr(kdev, qmgr) {
|
|
if ((id >= qmgr->start_queue) &&
|
|
(id < qmgr->start_queue + qmgr->num_queues))
|
|
return qmgr;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static int knav_queue_init_queue(struct knav_device *kdev,
|
|
struct knav_range_info *range,
|
|
struct knav_queue_inst *inst,
|
|
unsigned id)
|
|
{
|
|
char irq_name[KNAV_NAME_SIZE];
|
|
inst->qmgr = knav_find_qmgr(id);
|
|
if (!inst->qmgr)
|
|
return -1;
|
|
|
|
INIT_LIST_HEAD(&inst->handles);
|
|
inst->kdev = kdev;
|
|
inst->range = range;
|
|
inst->irq_num = -1;
|
|
inst->id = id;
|
|
scnprintf(irq_name, sizeof(irq_name), "hwqueue-%d", id);
|
|
inst->irq_name = kstrndup(irq_name, sizeof(irq_name), GFP_KERNEL);
|
|
|
|
if (range->ops && range->ops->init_queue)
|
|
return range->ops->init_queue(range, inst);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static int knav_queue_init_queues(struct knav_device *kdev)
|
|
{
|
|
struct knav_range_info *range;
|
|
int size, id, base_idx;
|
|
int idx = 0, ret = 0;
|
|
|
|
/* how much do we need for instance data? */
|
|
size = sizeof(struct knav_queue_inst);
|
|
|
|
/* round this up to a power of 2, keep the index to instance
|
|
* arithmetic fast.
|
|
* */
|
|
kdev->inst_shift = order_base_2(size);
|
|
size = (1 << kdev->inst_shift) * kdev->num_queues_in_use;
|
|
kdev->instances = devm_kzalloc(kdev->dev, size, GFP_KERNEL);
|
|
if (!kdev->instances)
|
|
return -ENOMEM;
|
|
|
|
for_each_queue_range(kdev, range) {
|
|
if (range->ops && range->ops->init_range)
|
|
range->ops->init_range(range);
|
|
base_idx = idx;
|
|
for (id = range->queue_base;
|
|
id < range->queue_base + range->num_queues; id++, idx++) {
|
|
ret = knav_queue_init_queue(kdev, range,
|
|
knav_queue_idx_to_inst(kdev, idx), id);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
range->queue_base_inst =
|
|
knav_queue_idx_to_inst(kdev, base_idx);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Match table for of_platform binding */
|
|
static const struct of_device_id keystone_qmss_of_match[] = {
|
|
{
|
|
.compatible = "ti,keystone-navigator-qmss",
|
|
},
|
|
{
|
|
.compatible = "ti,66ak2g-navss-qm",
|
|
.data = (void *)QMSS_66AK2G,
|
|
},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, keystone_qmss_of_match);
|
|
|
|
static int knav_queue_probe(struct platform_device *pdev)
|
|
{
|
|
struct device_node *node = pdev->dev.of_node;
|
|
struct device_node *qmgrs, *queue_pools, *regions, *pdsps;
|
|
const struct of_device_id *match;
|
|
struct device *dev = &pdev->dev;
|
|
u32 temp[2];
|
|
int ret;
|
|
|
|
if (!node) {
|
|
dev_err(dev, "device tree info unavailable\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
kdev = devm_kzalloc(dev, sizeof(struct knav_device), GFP_KERNEL);
|
|
if (!kdev) {
|
|
dev_err(dev, "memory allocation failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
match = of_match_device(of_match_ptr(keystone_qmss_of_match), dev);
|
|
if (match && match->data)
|
|
kdev->version = QMSS_66AK2G;
|
|
|
|
platform_set_drvdata(pdev, kdev);
|
|
kdev->dev = dev;
|
|
INIT_LIST_HEAD(&kdev->queue_ranges);
|
|
INIT_LIST_HEAD(&kdev->qmgrs);
|
|
INIT_LIST_HEAD(&kdev->pools);
|
|
INIT_LIST_HEAD(&kdev->regions);
|
|
INIT_LIST_HEAD(&kdev->pdsps);
|
|
|
|
pm_runtime_enable(&pdev->dev);
|
|
ret = pm_runtime_get_sync(&pdev->dev);
|
|
if (ret < 0) {
|
|
dev_err(dev, "Failed to enable QMSS\n");
|
|
return ret;
|
|
}
|
|
|
|
if (of_property_read_u32_array(node, "queue-range", temp, 2)) {
|
|
dev_err(dev, "queue-range not specified\n");
|
|
ret = -ENODEV;
|
|
goto err;
|
|
}
|
|
kdev->base_id = temp[0];
|
|
kdev->num_queues = temp[1];
|
|
|
|
/* Initialize queue managers using device tree configuration */
|
|
qmgrs = of_get_child_by_name(node, "qmgrs");
|
|
if (!qmgrs) {
|
|
dev_err(dev, "queue manager info not specified\n");
|
|
ret = -ENODEV;
|
|
goto err;
|
|
}
|
|
ret = knav_queue_init_qmgrs(kdev, qmgrs);
|
|
of_node_put(qmgrs);
|
|
if (ret)
|
|
goto err;
|
|
|
|
/* get pdsp configuration values from device tree */
|
|
pdsps = of_get_child_by_name(node, "pdsps");
|
|
if (pdsps) {
|
|
ret = knav_queue_init_pdsps(kdev, pdsps);
|
|
if (ret)
|
|
goto err;
|
|
|
|
ret = knav_queue_start_pdsps(kdev);
|
|
if (ret)
|
|
goto err;
|
|
}
|
|
of_node_put(pdsps);
|
|
|
|
/* get usable queue range values from device tree */
|
|
queue_pools = of_get_child_by_name(node, "queue-pools");
|
|
if (!queue_pools) {
|
|
dev_err(dev, "queue-pools not specified\n");
|
|
ret = -ENODEV;
|
|
goto err;
|
|
}
|
|
ret = knav_setup_queue_pools(kdev, queue_pools);
|
|
of_node_put(queue_pools);
|
|
if (ret)
|
|
goto err;
|
|
|
|
ret = knav_get_link_ram(kdev, "linkram0", &kdev->link_rams[0]);
|
|
if (ret) {
|
|
dev_err(kdev->dev, "could not setup linking ram\n");
|
|
goto err;
|
|
}
|
|
|
|
ret = knav_get_link_ram(kdev, "linkram1", &kdev->link_rams[1]);
|
|
if (ret) {
|
|
/*
|
|
* nothing really, we have one linking ram already, so we just
|
|
* live within our means
|
|
*/
|
|
}
|
|
|
|
ret = knav_queue_setup_link_ram(kdev);
|
|
if (ret)
|
|
goto err;
|
|
|
|
regions = of_get_child_by_name(node, "descriptor-regions");
|
|
if (!regions) {
|
|
dev_err(dev, "descriptor-regions not specified\n");
|
|
goto err;
|
|
}
|
|
ret = knav_queue_setup_regions(kdev, regions);
|
|
of_node_put(regions);
|
|
if (ret)
|
|
goto err;
|
|
|
|
ret = knav_queue_init_queues(kdev);
|
|
if (ret < 0) {
|
|
dev_err(dev, "hwqueue initialization failed\n");
|
|
goto err;
|
|
}
|
|
|
|
debugfs_create_file("qmss", S_IFREG | S_IRUGO, NULL, NULL,
|
|
&knav_queue_debug_ops);
|
|
device_ready = true;
|
|
return 0;
|
|
|
|
err:
|
|
knav_queue_stop_pdsps(kdev);
|
|
knav_queue_free_regions(kdev);
|
|
knav_free_queue_ranges(kdev);
|
|
pm_runtime_put_sync(&pdev->dev);
|
|
pm_runtime_disable(&pdev->dev);
|
|
return ret;
|
|
}
|
|
|
|
static int knav_queue_remove(struct platform_device *pdev)
|
|
{
|
|
/* TODO: Free resources */
|
|
pm_runtime_put_sync(&pdev->dev);
|
|
pm_runtime_disable(&pdev->dev);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver keystone_qmss_driver = {
|
|
.probe = knav_queue_probe,
|
|
.remove = knav_queue_remove,
|
|
.driver = {
|
|
.name = "keystone-navigator-qmss",
|
|
.of_match_table = keystone_qmss_of_match,
|
|
},
|
|
};
|
|
module_platform_driver(keystone_qmss_driver);
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("TI QMSS driver for Keystone SOCs");
|
|
MODULE_AUTHOR("Sandeep Nair <sandeep_n@ti.com>");
|
|
MODULE_AUTHOR("Santosh Shilimkar <santosh.shilimkar@ti.com>");
|