909 lines
25 KiB
C
909 lines
25 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* TI K3 DSP Remote Processor(s) driver
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*
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* Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
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* Suman Anna <s-anna@ti.com>
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*/
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#include <linux/io.h>
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#include <linux/mailbox_client.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/of_reserved_mem.h>
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#include <linux/omap-mailbox.h>
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#include <linux/platform_device.h>
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#include <linux/remoteproc.h>
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#include <linux/reset.h>
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#include <linux/slab.h>
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#include "omap_remoteproc.h"
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#include "remoteproc_internal.h"
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#include "ti_sci_proc.h"
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#define KEYSTONE_RPROC_LOCAL_ADDRESS_MASK (SZ_16M - 1)
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/**
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* struct k3_dsp_mem - internal memory structure
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* @cpu_addr: MPU virtual address of the memory region
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* @bus_addr: Bus address used to access the memory region
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* @dev_addr: Device address of the memory region from DSP view
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* @size: Size of the memory region
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*/
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struct k3_dsp_mem {
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void __iomem *cpu_addr;
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phys_addr_t bus_addr;
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u32 dev_addr;
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size_t size;
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};
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/**
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* struct k3_dsp_mem_data - memory definitions for a DSP
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* @name: name for this memory entry
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* @dev_addr: device address for the memory entry
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*/
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struct k3_dsp_mem_data {
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const char *name;
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const u32 dev_addr;
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};
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/**
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* struct k3_dsp_dev_data - device data structure for a DSP
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* @mems: pointer to memory definitions for a DSP
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* @num_mems: number of memory regions in @mems
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* @boot_align_addr: boot vector address alignment granularity
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* @uses_lreset: flag to denote the need for local reset management
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*/
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struct k3_dsp_dev_data {
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const struct k3_dsp_mem_data *mems;
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u32 num_mems;
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u32 boot_align_addr;
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bool uses_lreset;
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};
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/**
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* struct k3_dsp_rproc - k3 DSP remote processor driver structure
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* @dev: cached device pointer
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* @rproc: remoteproc device handle
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* @mem: internal memory regions data
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* @num_mems: number of internal memory regions
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* @rmem: reserved memory regions data
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* @num_rmems: number of reserved memory regions
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* @reset: reset control handle
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* @data: pointer to DSP-specific device data
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* @tsp: TI-SCI processor control handle
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* @ti_sci: TI-SCI handle
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* @ti_sci_id: TI-SCI device identifier
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* @mbox: mailbox channel handle
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* @client: mailbox client to request the mailbox channel
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*/
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struct k3_dsp_rproc {
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struct device *dev;
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struct rproc *rproc;
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struct k3_dsp_mem *mem;
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int num_mems;
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struct k3_dsp_mem *rmem;
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int num_rmems;
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struct reset_control *reset;
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const struct k3_dsp_dev_data *data;
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struct ti_sci_proc *tsp;
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const struct ti_sci_handle *ti_sci;
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u32 ti_sci_id;
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struct mbox_chan *mbox;
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struct mbox_client client;
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};
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/**
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* k3_dsp_rproc_mbox_callback() - inbound mailbox message handler
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* @client: mailbox client pointer used for requesting the mailbox channel
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* @data: mailbox payload
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*
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* This handler is invoked by the OMAP mailbox driver whenever a mailbox
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* message is received. Usually, the mailbox payload simply contains
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* the index of the virtqueue that is kicked by the remote processor,
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* and we let remoteproc core handle it.
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*
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* In addition to virtqueue indices, we also have some out-of-band values
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* that indicate different events. Those values are deliberately very
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* large so they don't coincide with virtqueue indices.
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*/
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static void k3_dsp_rproc_mbox_callback(struct mbox_client *client, void *data)
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{
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struct k3_dsp_rproc *kproc = container_of(client, struct k3_dsp_rproc,
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client);
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struct device *dev = kproc->rproc->dev.parent;
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const char *name = kproc->rproc->name;
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u32 msg = omap_mbox_message(data);
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dev_dbg(dev, "mbox msg: 0x%x\n", msg);
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switch (msg) {
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case RP_MBOX_CRASH:
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/*
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* remoteproc detected an exception, but error recovery is not
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* supported. So, just log this for now
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*/
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dev_err(dev, "K3 DSP rproc %s crashed\n", name);
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break;
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case RP_MBOX_ECHO_REPLY:
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dev_info(dev, "received echo reply from %s\n", name);
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break;
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default:
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/* silently handle all other valid messages */
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if (msg >= RP_MBOX_READY && msg < RP_MBOX_END_MSG)
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return;
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if (msg > kproc->rproc->max_notifyid) {
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dev_dbg(dev, "dropping unknown message 0x%x", msg);
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return;
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}
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/* msg contains the index of the triggered vring */
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if (rproc_vq_interrupt(kproc->rproc, msg) == IRQ_NONE)
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dev_dbg(dev, "no message was found in vqid %d\n", msg);
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}
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}
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/*
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* Kick the remote processor to notify about pending unprocessed messages.
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* The vqid usage is not used and is inconsequential, as the kick is performed
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* through a simulated GPIO (a bit in an IPC interrupt-triggering register),
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* the remote processor is expected to process both its Tx and Rx virtqueues.
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*/
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static void k3_dsp_rproc_kick(struct rproc *rproc, int vqid)
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{
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struct k3_dsp_rproc *kproc = rproc->priv;
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struct device *dev = rproc->dev.parent;
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mbox_msg_t msg = (mbox_msg_t)vqid;
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int ret;
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/* send the index of the triggered virtqueue in the mailbox payload */
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ret = mbox_send_message(kproc->mbox, (void *)msg);
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if (ret < 0)
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dev_err(dev, "failed to send mailbox message, status = %d\n",
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ret);
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}
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/* Put the DSP processor into reset */
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static int k3_dsp_rproc_reset(struct k3_dsp_rproc *kproc)
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{
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struct device *dev = kproc->dev;
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int ret;
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ret = reset_control_assert(kproc->reset);
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if (ret) {
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dev_err(dev, "local-reset assert failed, ret = %d\n", ret);
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return ret;
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}
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if (kproc->data->uses_lreset)
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return ret;
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ret = kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
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kproc->ti_sci_id);
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if (ret) {
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dev_err(dev, "module-reset assert failed, ret = %d\n", ret);
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if (reset_control_deassert(kproc->reset))
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dev_warn(dev, "local-reset deassert back failed\n");
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}
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return ret;
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}
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/* Release the DSP processor from reset */
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static int k3_dsp_rproc_release(struct k3_dsp_rproc *kproc)
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{
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struct device *dev = kproc->dev;
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int ret;
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if (kproc->data->uses_lreset)
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goto lreset;
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ret = kproc->ti_sci->ops.dev_ops.get_device(kproc->ti_sci,
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kproc->ti_sci_id);
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if (ret) {
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dev_err(dev, "module-reset deassert failed, ret = %d\n", ret);
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return ret;
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}
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lreset:
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ret = reset_control_deassert(kproc->reset);
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if (ret) {
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dev_err(dev, "local-reset deassert failed, ret = %d\n", ret);
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if (kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
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kproc->ti_sci_id))
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dev_warn(dev, "module-reset assert back failed\n");
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}
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return ret;
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}
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static int k3_dsp_rproc_request_mbox(struct rproc *rproc)
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{
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struct k3_dsp_rproc *kproc = rproc->priv;
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struct mbox_client *client = &kproc->client;
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struct device *dev = kproc->dev;
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int ret;
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client->dev = dev;
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client->tx_done = NULL;
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client->rx_callback = k3_dsp_rproc_mbox_callback;
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client->tx_block = false;
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client->knows_txdone = false;
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kproc->mbox = mbox_request_channel(client, 0);
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if (IS_ERR(kproc->mbox)) {
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ret = -EBUSY;
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dev_err(dev, "mbox_request_channel failed: %ld\n",
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PTR_ERR(kproc->mbox));
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return ret;
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}
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/*
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* Ping the remote processor, this is only for sanity-sake for now;
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* there is no functional effect whatsoever.
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*
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* Note that the reply will _not_ arrive immediately: this message
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* will wait in the mailbox fifo until the remote processor is booted.
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*/
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ret = mbox_send_message(kproc->mbox, (void *)RP_MBOX_ECHO_REQUEST);
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if (ret < 0) {
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dev_err(dev, "mbox_send_message failed: %d\n", ret);
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mbox_free_channel(kproc->mbox);
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return ret;
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}
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return 0;
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}
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/*
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* The C66x DSP cores have a local reset that affects only the CPU, and a
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* generic module reset that powers on the device and allows the DSP internal
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* memories to be accessed while the local reset is asserted. This function is
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* used to release the global reset on C66x DSPs to allow loading into the DSP
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* internal RAMs. The .prepare() ops is invoked by remoteproc core before any
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* firmware loading, and is followed by the .start() ops after loading to
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* actually let the C66x DSP cores run. This callback is invoked only in
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* remoteproc mode.
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*/
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static int k3_dsp_rproc_prepare(struct rproc *rproc)
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{
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struct k3_dsp_rproc *kproc = rproc->priv;
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struct device *dev = kproc->dev;
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int ret;
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ret = kproc->ti_sci->ops.dev_ops.get_device(kproc->ti_sci,
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kproc->ti_sci_id);
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if (ret)
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dev_err(dev, "module-reset deassert failed, cannot enable internal RAM loading, ret = %d\n",
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ret);
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return ret;
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}
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/*
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* This function implements the .unprepare() ops and performs the complimentary
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* operations to that of the .prepare() ops. The function is used to assert the
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* global reset on applicable C66x cores. This completes the second portion of
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* powering down the C66x DSP cores. The cores themselves are only halted in the
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* .stop() callback through the local reset, and the .unprepare() ops is invoked
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* by the remoteproc core after the remoteproc is stopped to balance the global
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* reset. This callback is invoked only in remoteproc mode.
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*/
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static int k3_dsp_rproc_unprepare(struct rproc *rproc)
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{
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struct k3_dsp_rproc *kproc = rproc->priv;
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struct device *dev = kproc->dev;
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int ret;
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ret = kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
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kproc->ti_sci_id);
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if (ret)
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dev_err(dev, "module-reset assert failed, ret = %d\n", ret);
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return ret;
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}
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/*
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* Power up the DSP remote processor.
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*
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* This function will be invoked only after the firmware for this rproc
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* was loaded, parsed successfully, and all of its resource requirements
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* were met. This callback is invoked only in remoteproc mode.
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*/
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static int k3_dsp_rproc_start(struct rproc *rproc)
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{
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struct k3_dsp_rproc *kproc = rproc->priv;
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struct device *dev = kproc->dev;
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u32 boot_addr;
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int ret;
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ret = k3_dsp_rproc_request_mbox(rproc);
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if (ret)
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return ret;
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boot_addr = rproc->bootaddr;
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if (boot_addr & (kproc->data->boot_align_addr - 1)) {
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dev_err(dev, "invalid boot address 0x%x, must be aligned on a 0x%x boundary\n",
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boot_addr, kproc->data->boot_align_addr);
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ret = -EINVAL;
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goto put_mbox;
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}
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dev_err(dev, "booting DSP core using boot addr = 0x%x\n", boot_addr);
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ret = ti_sci_proc_set_config(kproc->tsp, boot_addr, 0, 0);
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if (ret)
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goto put_mbox;
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ret = k3_dsp_rproc_release(kproc);
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if (ret)
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goto put_mbox;
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return 0;
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put_mbox:
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mbox_free_channel(kproc->mbox);
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return ret;
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}
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/*
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* Stop the DSP remote processor.
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*
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* This function puts the DSP processor into reset, and finishes processing
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* of any pending messages. This callback is invoked only in remoteproc mode.
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*/
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static int k3_dsp_rproc_stop(struct rproc *rproc)
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{
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struct k3_dsp_rproc *kproc = rproc->priv;
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mbox_free_channel(kproc->mbox);
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k3_dsp_rproc_reset(kproc);
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return 0;
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}
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/*
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* Attach to a running DSP remote processor (IPC-only mode)
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*
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* This rproc attach callback only needs to request the mailbox, the remote
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* processor is already booted, so there is no need to issue any TI-SCI
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* commands to boot the DSP core. This callback is invoked only in IPC-only
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* mode.
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*/
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static int k3_dsp_rproc_attach(struct rproc *rproc)
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{
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struct k3_dsp_rproc *kproc = rproc->priv;
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struct device *dev = kproc->dev;
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int ret;
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ret = k3_dsp_rproc_request_mbox(rproc);
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if (ret)
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return ret;
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dev_info(dev, "DSP initialized in IPC-only mode\n");
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return 0;
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}
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/*
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* Detach from a running DSP remote processor (IPC-only mode)
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*
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* This rproc detach callback performs the opposite operation to attach callback
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* and only needs to release the mailbox, the DSP core is not stopped and will
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* be left to continue to run its booted firmware. This callback is invoked only
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* in IPC-only mode.
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*/
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static int k3_dsp_rproc_detach(struct rproc *rproc)
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{
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struct k3_dsp_rproc *kproc = rproc->priv;
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struct device *dev = kproc->dev;
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mbox_free_channel(kproc->mbox);
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dev_info(dev, "DSP deinitialized in IPC-only mode\n");
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return 0;
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}
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/*
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* This function implements the .get_loaded_rsc_table() callback and is used
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* to provide the resource table for a booted DSP in IPC-only mode. The K3 DSP
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* firmwares follow a design-by-contract approach and are expected to have the
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* resource table at the base of the DDR region reserved for firmware usage.
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* This provides flexibility for the remote processor to be booted by different
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* bootloaders that may or may not have the ability to publish the resource table
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* address and size through a DT property. This callback is invoked only in
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* IPC-only mode.
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*/
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static struct resource_table *k3_dsp_get_loaded_rsc_table(struct rproc *rproc,
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|
size_t *rsc_table_sz)
|
||
|
{
|
||
|
struct k3_dsp_rproc *kproc = rproc->priv;
|
||
|
struct device *dev = kproc->dev;
|
||
|
|
||
|
if (!kproc->rmem[0].cpu_addr) {
|
||
|
dev_err(dev, "memory-region #1 does not exist, loaded rsc table can't be found");
|
||
|
return ERR_PTR(-ENOMEM);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* NOTE: The resource table size is currently hard-coded to a maximum
|
||
|
* of 256 bytes. The most common resource table usage for K3 firmwares
|
||
|
* is to only have the vdev resource entry and an optional trace entry.
|
||
|
* The exact size could be computed based on resource table address, but
|
||
|
* the hard-coded value suffices to support the IPC-only mode.
|
||
|
*/
|
||
|
*rsc_table_sz = 256;
|
||
|
return (struct resource_table *)kproc->rmem[0].cpu_addr;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Custom function to translate a DSP device address (internal RAMs only) to a
|
||
|
* kernel virtual address. The DSPs can access their RAMs at either an internal
|
||
|
* address visible only from a DSP, or at the SoC-level bus address. Both these
|
||
|
* addresses need to be looked through for translation. The translated addresses
|
||
|
* can be used either by the remoteproc core for loading (when using kernel
|
||
|
* remoteproc loader), or by any rpmsg bus drivers.
|
||
|
*/
|
||
|
static void *k3_dsp_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
|
||
|
{
|
||
|
struct k3_dsp_rproc *kproc = rproc->priv;
|
||
|
void __iomem *va = NULL;
|
||
|
phys_addr_t bus_addr;
|
||
|
u32 dev_addr, offset;
|
||
|
size_t size;
|
||
|
int i;
|
||
|
|
||
|
if (len == 0)
|
||
|
return NULL;
|
||
|
|
||
|
for (i = 0; i < kproc->num_mems; i++) {
|
||
|
bus_addr = kproc->mem[i].bus_addr;
|
||
|
dev_addr = kproc->mem[i].dev_addr;
|
||
|
size = kproc->mem[i].size;
|
||
|
|
||
|
if (da < KEYSTONE_RPROC_LOCAL_ADDRESS_MASK) {
|
||
|
/* handle DSP-view addresses */
|
||
|
if (da >= dev_addr &&
|
||
|
((da + len) <= (dev_addr + size))) {
|
||
|
offset = da - dev_addr;
|
||
|
va = kproc->mem[i].cpu_addr + offset;
|
||
|
return (__force void *)va;
|
||
|
}
|
||
|
} else {
|
||
|
/* handle SoC-view addresses */
|
||
|
if (da >= bus_addr &&
|
||
|
(da + len) <= (bus_addr + size)) {
|
||
|
offset = da - bus_addr;
|
||
|
va = kproc->mem[i].cpu_addr + offset;
|
||
|
return (__force void *)va;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/* handle static DDR reserved memory regions */
|
||
|
for (i = 0; i < kproc->num_rmems; i++) {
|
||
|
dev_addr = kproc->rmem[i].dev_addr;
|
||
|
size = kproc->rmem[i].size;
|
||
|
|
||
|
if (da >= dev_addr && ((da + len) <= (dev_addr + size))) {
|
||
|
offset = da - dev_addr;
|
||
|
va = kproc->rmem[i].cpu_addr + offset;
|
||
|
return (__force void *)va;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
static const struct rproc_ops k3_dsp_rproc_ops = {
|
||
|
.start = k3_dsp_rproc_start,
|
||
|
.stop = k3_dsp_rproc_stop,
|
||
|
.kick = k3_dsp_rproc_kick,
|
||
|
.da_to_va = k3_dsp_rproc_da_to_va,
|
||
|
};
|
||
|
|
||
|
static int k3_dsp_rproc_of_get_memories(struct platform_device *pdev,
|
||
|
struct k3_dsp_rproc *kproc)
|
||
|
{
|
||
|
const struct k3_dsp_dev_data *data = kproc->data;
|
||
|
struct device *dev = &pdev->dev;
|
||
|
struct resource *res;
|
||
|
int num_mems = 0;
|
||
|
int i;
|
||
|
|
||
|
num_mems = kproc->data->num_mems;
|
||
|
kproc->mem = devm_kcalloc(kproc->dev, num_mems,
|
||
|
sizeof(*kproc->mem), GFP_KERNEL);
|
||
|
if (!kproc->mem)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
for (i = 0; i < num_mems; i++) {
|
||
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
|
||
|
data->mems[i].name);
|
||
|
if (!res) {
|
||
|
dev_err(dev, "found no memory resource for %s\n",
|
||
|
data->mems[i].name);
|
||
|
return -EINVAL;
|
||
|
}
|
||
|
if (!devm_request_mem_region(dev, res->start,
|
||
|
resource_size(res),
|
||
|
dev_name(dev))) {
|
||
|
dev_err(dev, "could not request %s region for resource\n",
|
||
|
data->mems[i].name);
|
||
|
return -EBUSY;
|
||
|
}
|
||
|
|
||
|
kproc->mem[i].cpu_addr = devm_ioremap_wc(dev, res->start,
|
||
|
resource_size(res));
|
||
|
if (!kproc->mem[i].cpu_addr) {
|
||
|
dev_err(dev, "failed to map %s memory\n",
|
||
|
data->mems[i].name);
|
||
|
return -ENOMEM;
|
||
|
}
|
||
|
kproc->mem[i].bus_addr = res->start;
|
||
|
kproc->mem[i].dev_addr = data->mems[i].dev_addr;
|
||
|
kproc->mem[i].size = resource_size(res);
|
||
|
|
||
|
dev_dbg(dev, "memory %8s: bus addr %pa size 0x%zx va %pK da 0x%x\n",
|
||
|
data->mems[i].name, &kproc->mem[i].bus_addr,
|
||
|
kproc->mem[i].size, kproc->mem[i].cpu_addr,
|
||
|
kproc->mem[i].dev_addr);
|
||
|
}
|
||
|
kproc->num_mems = num_mems;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int k3_dsp_reserved_mem_init(struct k3_dsp_rproc *kproc)
|
||
|
{
|
||
|
struct device *dev = kproc->dev;
|
||
|
struct device_node *np = dev->of_node;
|
||
|
struct device_node *rmem_np;
|
||
|
struct reserved_mem *rmem;
|
||
|
int num_rmems;
|
||
|
int ret, i;
|
||
|
|
||
|
num_rmems = of_property_count_elems_of_size(np, "memory-region",
|
||
|
sizeof(phandle));
|
||
|
if (num_rmems <= 0) {
|
||
|
dev_err(dev, "device does not reserved memory regions, ret = %d\n",
|
||
|
num_rmems);
|
||
|
return -EINVAL;
|
||
|
}
|
||
|
if (num_rmems < 2) {
|
||
|
dev_err(dev, "device needs at least two memory regions to be defined, num = %d\n",
|
||
|
num_rmems);
|
||
|
return -EINVAL;
|
||
|
}
|
||
|
|
||
|
/* use reserved memory region 0 for vring DMA allocations */
|
||
|
ret = of_reserved_mem_device_init_by_idx(dev, np, 0);
|
||
|
if (ret) {
|
||
|
dev_err(dev, "device cannot initialize DMA pool, ret = %d\n",
|
||
|
ret);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
num_rmems--;
|
||
|
kproc->rmem = kcalloc(num_rmems, sizeof(*kproc->rmem), GFP_KERNEL);
|
||
|
if (!kproc->rmem) {
|
||
|
ret = -ENOMEM;
|
||
|
goto release_rmem;
|
||
|
}
|
||
|
|
||
|
/* use remaining reserved memory regions for static carveouts */
|
||
|
for (i = 0; i < num_rmems; i++) {
|
||
|
rmem_np = of_parse_phandle(np, "memory-region", i + 1);
|
||
|
if (!rmem_np) {
|
||
|
ret = -EINVAL;
|
||
|
goto unmap_rmem;
|
||
|
}
|
||
|
|
||
|
rmem = of_reserved_mem_lookup(rmem_np);
|
||
|
if (!rmem) {
|
||
|
of_node_put(rmem_np);
|
||
|
ret = -EINVAL;
|
||
|
goto unmap_rmem;
|
||
|
}
|
||
|
of_node_put(rmem_np);
|
||
|
|
||
|
kproc->rmem[i].bus_addr = rmem->base;
|
||
|
/* 64-bit address regions currently not supported */
|
||
|
kproc->rmem[i].dev_addr = (u32)rmem->base;
|
||
|
kproc->rmem[i].size = rmem->size;
|
||
|
kproc->rmem[i].cpu_addr = ioremap_wc(rmem->base, rmem->size);
|
||
|
if (!kproc->rmem[i].cpu_addr) {
|
||
|
dev_err(dev, "failed to map reserved memory#%d at %pa of size %pa\n",
|
||
|
i + 1, &rmem->base, &rmem->size);
|
||
|
ret = -ENOMEM;
|
||
|
goto unmap_rmem;
|
||
|
}
|
||
|
|
||
|
dev_dbg(dev, "reserved memory%d: bus addr %pa size 0x%zx va %pK da 0x%x\n",
|
||
|
i + 1, &kproc->rmem[i].bus_addr,
|
||
|
kproc->rmem[i].size, kproc->rmem[i].cpu_addr,
|
||
|
kproc->rmem[i].dev_addr);
|
||
|
}
|
||
|
kproc->num_rmems = num_rmems;
|
||
|
|
||
|
return 0;
|
||
|
|
||
|
unmap_rmem:
|
||
|
for (i--; i >= 0; i--)
|
||
|
iounmap(kproc->rmem[i].cpu_addr);
|
||
|
kfree(kproc->rmem);
|
||
|
release_rmem:
|
||
|
of_reserved_mem_device_release(kproc->dev);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static void k3_dsp_reserved_mem_exit(struct k3_dsp_rproc *kproc)
|
||
|
{
|
||
|
int i;
|
||
|
|
||
|
for (i = 0; i < kproc->num_rmems; i++)
|
||
|
iounmap(kproc->rmem[i].cpu_addr);
|
||
|
kfree(kproc->rmem);
|
||
|
|
||
|
of_reserved_mem_device_release(kproc->dev);
|
||
|
}
|
||
|
|
||
|
static
|
||
|
struct ti_sci_proc *k3_dsp_rproc_of_get_tsp(struct device *dev,
|
||
|
const struct ti_sci_handle *sci)
|
||
|
{
|
||
|
struct ti_sci_proc *tsp;
|
||
|
u32 temp[2];
|
||
|
int ret;
|
||
|
|
||
|
ret = of_property_read_u32_array(dev->of_node, "ti,sci-proc-ids",
|
||
|
temp, 2);
|
||
|
if (ret < 0)
|
||
|
return ERR_PTR(ret);
|
||
|
|
||
|
tsp = kzalloc(sizeof(*tsp), GFP_KERNEL);
|
||
|
if (!tsp)
|
||
|
return ERR_PTR(-ENOMEM);
|
||
|
|
||
|
tsp->dev = dev;
|
||
|
tsp->sci = sci;
|
||
|
tsp->ops = &sci->ops.proc_ops;
|
||
|
tsp->proc_id = temp[0];
|
||
|
tsp->host_id = temp[1];
|
||
|
|
||
|
return tsp;
|
||
|
}
|
||
|
|
||
|
static int k3_dsp_rproc_probe(struct platform_device *pdev)
|
||
|
{
|
||
|
struct device *dev = &pdev->dev;
|
||
|
struct device_node *np = dev->of_node;
|
||
|
const struct k3_dsp_dev_data *data;
|
||
|
struct k3_dsp_rproc *kproc;
|
||
|
struct rproc *rproc;
|
||
|
const char *fw_name;
|
||
|
bool p_state = false;
|
||
|
int ret = 0;
|
||
|
int ret1;
|
||
|
|
||
|
data = of_device_get_match_data(dev);
|
||
|
if (!data)
|
||
|
return -ENODEV;
|
||
|
|
||
|
ret = rproc_of_parse_firmware(dev, 0, &fw_name);
|
||
|
if (ret) {
|
||
|
dev_err(dev, "failed to parse firmware-name property, ret = %d\n",
|
||
|
ret);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
rproc = rproc_alloc(dev, dev_name(dev), &k3_dsp_rproc_ops, fw_name,
|
||
|
sizeof(*kproc));
|
||
|
if (!rproc)
|
||
|
return -ENOMEM;
|
||
|
|
||
|
rproc->has_iommu = false;
|
||
|
rproc->recovery_disabled = true;
|
||
|
if (data->uses_lreset) {
|
||
|
rproc->ops->prepare = k3_dsp_rproc_prepare;
|
||
|
rproc->ops->unprepare = k3_dsp_rproc_unprepare;
|
||
|
}
|
||
|
kproc = rproc->priv;
|
||
|
kproc->rproc = rproc;
|
||
|
kproc->dev = dev;
|
||
|
kproc->data = data;
|
||
|
|
||
|
kproc->ti_sci = ti_sci_get_by_phandle(np, "ti,sci");
|
||
|
if (IS_ERR(kproc->ti_sci)) {
|
||
|
ret = PTR_ERR(kproc->ti_sci);
|
||
|
if (ret != -EPROBE_DEFER) {
|
||
|
dev_err(dev, "failed to get ti-sci handle, ret = %d\n",
|
||
|
ret);
|
||
|
}
|
||
|
kproc->ti_sci = NULL;
|
||
|
goto free_rproc;
|
||
|
}
|
||
|
|
||
|
ret = of_property_read_u32(np, "ti,sci-dev-id", &kproc->ti_sci_id);
|
||
|
if (ret) {
|
||
|
dev_err(dev, "missing 'ti,sci-dev-id' property\n");
|
||
|
goto put_sci;
|
||
|
}
|
||
|
|
||
|
kproc->reset = devm_reset_control_get_exclusive(dev, NULL);
|
||
|
if (IS_ERR(kproc->reset)) {
|
||
|
ret = PTR_ERR(kproc->reset);
|
||
|
dev_err(dev, "failed to get reset, status = %d\n", ret);
|
||
|
goto put_sci;
|
||
|
}
|
||
|
|
||
|
kproc->tsp = k3_dsp_rproc_of_get_tsp(dev, kproc->ti_sci);
|
||
|
if (IS_ERR(kproc->tsp)) {
|
||
|
dev_err(dev, "failed to construct ti-sci proc control, ret = %d\n",
|
||
|
ret);
|
||
|
ret = PTR_ERR(kproc->tsp);
|
||
|
goto put_sci;
|
||
|
}
|
||
|
|
||
|
ret = ti_sci_proc_request(kproc->tsp);
|
||
|
if (ret < 0) {
|
||
|
dev_err(dev, "ti_sci_proc_request failed, ret = %d\n", ret);
|
||
|
goto free_tsp;
|
||
|
}
|
||
|
|
||
|
ret = k3_dsp_rproc_of_get_memories(pdev, kproc);
|
||
|
if (ret)
|
||
|
goto release_tsp;
|
||
|
|
||
|
ret = k3_dsp_reserved_mem_init(kproc);
|
||
|
if (ret) {
|
||
|
dev_err(dev, "reserved memory init failed, ret = %d\n", ret);
|
||
|
goto release_tsp;
|
||
|
}
|
||
|
|
||
|
ret = kproc->ti_sci->ops.dev_ops.is_on(kproc->ti_sci, kproc->ti_sci_id,
|
||
|
NULL, &p_state);
|
||
|
if (ret) {
|
||
|
dev_err(dev, "failed to get initial state, mode cannot be determined, ret = %d\n",
|
||
|
ret);
|
||
|
goto release_mem;
|
||
|
}
|
||
|
|
||
|
/* configure J721E devices for either remoteproc or IPC-only mode */
|
||
|
if (p_state) {
|
||
|
dev_info(dev, "configured DSP for IPC-only mode\n");
|
||
|
rproc->state = RPROC_DETACHED;
|
||
|
/* override rproc ops with only required IPC-only mode ops */
|
||
|
rproc->ops->prepare = NULL;
|
||
|
rproc->ops->unprepare = NULL;
|
||
|
rproc->ops->start = NULL;
|
||
|
rproc->ops->stop = NULL;
|
||
|
rproc->ops->attach = k3_dsp_rproc_attach;
|
||
|
rproc->ops->detach = k3_dsp_rproc_detach;
|
||
|
rproc->ops->get_loaded_rsc_table = k3_dsp_get_loaded_rsc_table;
|
||
|
} else {
|
||
|
dev_info(dev, "configured DSP for remoteproc mode\n");
|
||
|
/*
|
||
|
* ensure the DSP local reset is asserted to ensure the DSP
|
||
|
* doesn't execute bogus code in .prepare() when the module
|
||
|
* reset is released.
|
||
|
*/
|
||
|
if (data->uses_lreset) {
|
||
|
ret = reset_control_status(kproc->reset);
|
||
|
if (ret < 0) {
|
||
|
dev_err(dev, "failed to get reset status, status = %d\n",
|
||
|
ret);
|
||
|
goto release_mem;
|
||
|
} else if (ret == 0) {
|
||
|
dev_warn(dev, "local reset is deasserted for device\n");
|
||
|
k3_dsp_rproc_reset(kproc);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
ret = rproc_add(rproc);
|
||
|
if (ret) {
|
||
|
dev_err(dev, "failed to add register device with remoteproc core, status = %d\n",
|
||
|
ret);
|
||
|
goto release_mem;
|
||
|
}
|
||
|
|
||
|
platform_set_drvdata(pdev, kproc);
|
||
|
|
||
|
return 0;
|
||
|
|
||
|
release_mem:
|
||
|
k3_dsp_reserved_mem_exit(kproc);
|
||
|
release_tsp:
|
||
|
ret1 = ti_sci_proc_release(kproc->tsp);
|
||
|
if (ret1)
|
||
|
dev_err(dev, "failed to release proc, ret = %d\n", ret1);
|
||
|
free_tsp:
|
||
|
kfree(kproc->tsp);
|
||
|
put_sci:
|
||
|
ret1 = ti_sci_put_handle(kproc->ti_sci);
|
||
|
if (ret1)
|
||
|
dev_err(dev, "failed to put ti_sci handle, ret = %d\n", ret1);
|
||
|
free_rproc:
|
||
|
rproc_free(rproc);
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
static int k3_dsp_rproc_remove(struct platform_device *pdev)
|
||
|
{
|
||
|
struct k3_dsp_rproc *kproc = platform_get_drvdata(pdev);
|
||
|
struct rproc *rproc = kproc->rproc;
|
||
|
struct device *dev = &pdev->dev;
|
||
|
int ret;
|
||
|
|
||
|
if (rproc->state == RPROC_ATTACHED) {
|
||
|
ret = rproc_detach(rproc);
|
||
|
if (ret) {
|
||
|
dev_err(dev, "failed to detach proc, ret = %d\n", ret);
|
||
|
return ret;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
rproc_del(kproc->rproc);
|
||
|
|
||
|
ret = ti_sci_proc_release(kproc->tsp);
|
||
|
if (ret)
|
||
|
dev_err(dev, "failed to release proc, ret = %d\n", ret);
|
||
|
|
||
|
kfree(kproc->tsp);
|
||
|
|
||
|
ret = ti_sci_put_handle(kproc->ti_sci);
|
||
|
if (ret)
|
||
|
dev_err(dev, "failed to put ti_sci handle, ret = %d\n", ret);
|
||
|
|
||
|
k3_dsp_reserved_mem_exit(kproc);
|
||
|
rproc_free(kproc->rproc);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static const struct k3_dsp_mem_data c66_mems[] = {
|
||
|
{ .name = "l2sram", .dev_addr = 0x800000 },
|
||
|
{ .name = "l1pram", .dev_addr = 0xe00000 },
|
||
|
{ .name = "l1dram", .dev_addr = 0xf00000 },
|
||
|
};
|
||
|
|
||
|
/* C71x cores only have a L1P Cache, there are no L1P SRAMs */
|
||
|
static const struct k3_dsp_mem_data c71_mems[] = {
|
||
|
{ .name = "l2sram", .dev_addr = 0x800000 },
|
||
|
{ .name = "l1dram", .dev_addr = 0xe00000 },
|
||
|
};
|
||
|
|
||
|
static const struct k3_dsp_dev_data c66_data = {
|
||
|
.mems = c66_mems,
|
||
|
.num_mems = ARRAY_SIZE(c66_mems),
|
||
|
.boot_align_addr = SZ_1K,
|
||
|
.uses_lreset = true,
|
||
|
};
|
||
|
|
||
|
static const struct k3_dsp_dev_data c71_data = {
|
||
|
.mems = c71_mems,
|
||
|
.num_mems = ARRAY_SIZE(c71_mems),
|
||
|
.boot_align_addr = SZ_2M,
|
||
|
.uses_lreset = false,
|
||
|
};
|
||
|
|
||
|
static const struct of_device_id k3_dsp_of_match[] = {
|
||
|
{ .compatible = "ti,j721e-c66-dsp", .data = &c66_data, },
|
||
|
{ .compatible = "ti,j721e-c71-dsp", .data = &c71_data, },
|
||
|
{ .compatible = "ti,j721s2-c71-dsp", .data = &c71_data, },
|
||
|
{ /* sentinel */ },
|
||
|
};
|
||
|
MODULE_DEVICE_TABLE(of, k3_dsp_of_match);
|
||
|
|
||
|
static struct platform_driver k3_dsp_rproc_driver = {
|
||
|
.probe = k3_dsp_rproc_probe,
|
||
|
.remove = k3_dsp_rproc_remove,
|
||
|
.driver = {
|
||
|
.name = "k3-dsp-rproc",
|
||
|
.of_match_table = k3_dsp_of_match,
|
||
|
},
|
||
|
};
|
||
|
|
||
|
module_platform_driver(k3_dsp_rproc_driver);
|
||
|
|
||
|
MODULE_AUTHOR("Suman Anna <s-anna@ti.com>");
|
||
|
MODULE_LICENSE("GPL v2");
|
||
|
MODULE_DESCRIPTION("TI K3 DSP Remoteproc driver");
|