mirror of
https://github.com/Fishwaldo/linux-bl808.git
synced 2025-03-16 03:54:10 +00:00
WIP: Remoteproc support for bl808
This commit is contained in:
parent
e17d63c2b6
commit
9348e10221
3 changed files with 400 additions and 0 deletions
|
|
@ -161,6 +161,15 @@ config PRU_REMOTEPROC
|
|||
processors on various TI SoCs. It's safe to say N here if you're
|
||||
not interested in the PRU or if you are unsure.
|
||||
|
||||
config BL808_REMOTEPROC
|
||||
tristate "BL808 remoteproc support"
|
||||
select MAILBOX
|
||||
help
|
||||
Support for Bouffalo Labs BL808 remote processors M0/LP
|
||||
subsystem via the remote processor framework.
|
||||
|
||||
Say Y or M here to enable
|
||||
|
||||
config QCOM_PIL_INFO
|
||||
tristate
|
||||
|
||||
|
|
|
|||
|
|
@ -39,3 +39,5 @@ obj-$(CONFIG_STM32_RPROC) += stm32_rproc.o
|
|||
obj-$(CONFIG_TI_K3_DSP_REMOTEPROC) += ti_k3_dsp_remoteproc.o
|
||||
obj-$(CONFIG_TI_K3_R5_REMOTEPROC) += ti_k3_r5_remoteproc.o
|
||||
obj-$(CONFIG_XLNX_R5_REMOTEPROC) += xlnx_r5_remoteproc.o
|
||||
obj-$(CONFIG_BL808_REMOTEPROC) += bl808_remoteproc.o
|
||||
|
||||
|
|
|
|||
389
drivers/remoteproc/bl808_remoteproc.c
Normal file
389
drivers/remoteproc/bl808_remoteproc.c
Normal file
|
|
@ -0,0 +1,389 @@
|
|||
// SPDX-License-Identifier: GPL-2.0-only
|
||||
/*
|
||||
* Remote processor machine-specific module for bl808
|
||||
*
|
||||
* Copyright (C) 2023 Justin Hammond
|
||||
*/
|
||||
|
||||
#include <linux/bitops.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/reset.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/irq.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/of_reserved_mem.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/remoteproc.h>
|
||||
#include <linux/mailbox_client.h>
|
||||
|
||||
#include "remoteproc_internal.h"
|
||||
|
||||
|
||||
/**
|
||||
* struct bl808_rproc - bl808 remote processor instance state
|
||||
* @rproc: rproc handle
|
||||
* @mbox: the mailbox channel
|
||||
* @client: the mailbox client
|
||||
*/
|
||||
struct bl808_rproc {
|
||||
struct rproc *rproc;
|
||||
struct mbox_chan *mbox;
|
||||
struct mbox_client client;
|
||||
};
|
||||
|
||||
/* The feature bitmap for virtio rpmsg */
|
||||
#define VIRTIO_RPMSG_F_NS 0 /* RP supports name service notifications */
|
||||
|
||||
#define FW_RSC_U32_ADDR_ANY 0xFFFFFFFFUL
|
||||
|
||||
#define RPMSG_VDEV_DFEATURES (1 << VIRTIO_RPMSG_F_NS)
|
||||
|
||||
/* VirtIO rpmsg device id */
|
||||
#define VIRTIO_ID_RPMSG_ 7
|
||||
|
||||
/* Resource table entries */
|
||||
#define NUM_VRINGS 0x02
|
||||
#define VRING_ALIGN 0x1000
|
||||
#define RING_TX FW_RSC_U32_ADDR_ANY
|
||||
#define RING_RX FW_RSC_U32_ADDR_ANY
|
||||
#define VRING_SIZE 2
|
||||
|
||||
#define NUM_TABLE_ENTRIES 1
|
||||
|
||||
#define NO_RESOURCE_ENTRIES 1
|
||||
|
||||
/* this is normally in the header of the ELF files for firmware
|
||||
* but since M0 is already running and there isn't a ELF file on
|
||||
* flash for it, we fudge the resource table header to statically
|
||||
* specify our virtio rings etc
|
||||
*/
|
||||
struct remote_resource_table {
|
||||
u32 version;
|
||||
u32 num;
|
||||
u32 reserved[2];
|
||||
u32 offset[NO_RESOURCE_ENTRIES];
|
||||
/* rpmsg vdev entry */
|
||||
u32 type;
|
||||
struct fw_rsc_vdev rpmsg_vdev;
|
||||
struct fw_rsc_vdev_vring rpmsg_vring0;
|
||||
struct fw_rsc_vdev_vring rpmsg_vring1;
|
||||
}__packed;
|
||||
|
||||
/* this is our fudged ELF Resource Table Header setup with
|
||||
* one rpmsg virtio device and two virtio rings
|
||||
*/
|
||||
struct remote_resource_table resources = {
|
||||
/* Version */
|
||||
.version = 1,
|
||||
|
||||
/* NUmber of table entries */
|
||||
.num = NUM_TABLE_ENTRIES,
|
||||
|
||||
/* reserved fields */
|
||||
.reserved = {0, 0,},
|
||||
|
||||
/* Offsets of rsc entries */
|
||||
.offset[0] = offsetof(struct remote_resource_table, type),
|
||||
|
||||
.type = RSC_VDEV,
|
||||
/* Virtio device entry */
|
||||
{
|
||||
VIRTIO_ID_RPMSG_, 0, RPMSG_VDEV_DFEATURES, 0, 0, 0,
|
||||
NUM_VRINGS, {0, 0},
|
||||
},
|
||||
|
||||
/* Vring rsc entry - part of vdev rsc entry */
|
||||
{RING_TX, VRING_ALIGN, VRING_SIZE, 1, 0},
|
||||
{RING_RX, VRING_ALIGN, VRING_SIZE, 2, 0},
|
||||
};
|
||||
|
||||
/* return a pointer to our resource table
|
||||
*/
|
||||
struct resource_table *bl808_rproc_get_loaded_rsc_table(struct rproc *rproc, size_t *size)
|
||||
{
|
||||
struct device *dev = rproc->dev.parent;
|
||||
dev_dbg(dev, "bl808_rproc_get_loaded_rsc_table");
|
||||
|
||||
*size = sizeof(resources);
|
||||
return (struct resource_table *)&resources;
|
||||
}
|
||||
|
||||
/* allocate vdev0buffer */
|
||||
static int bl808_rproc_mem_alloc(struct rproc *rproc,
|
||||
struct rproc_mem_entry *mem)
|
||||
{
|
||||
struct device *dev = rproc->dev.parent;
|
||||
void *va;
|
||||
|
||||
dev_dbg(dev, "Allocating memory region");
|
||||
|
||||
va = ioremap_wc(mem->dma, mem->len);
|
||||
if (!va) {
|
||||
dev_err(dev, "Unable to map memory region: %pa+%zx\n",
|
||||
&mem->dma, mem->len);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
/* Update memory entry va */
|
||||
mem->va = va;
|
||||
dev_dbg(dev, "Allocated memory region: %pa+%zx -> %p", &mem->dma, mem->len, mem->va);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* release vdev0buffer */
|
||||
static int bl808_rproc_mem_release(struct rproc *rproc,
|
||||
struct rproc_mem_entry *mem)
|
||||
{
|
||||
struct device *dev = rproc->dev.parent;
|
||||
|
||||
dev_dbg(dev, "release memory region");
|
||||
|
||||
iounmap(mem->va);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Pull the memory ranges for virtio from the device tree and register them
|
||||
*/
|
||||
static int bl808_rproc_setupmem(struct rproc *rproc)
|
||||
{
|
||||
struct device *dev = rproc->dev.parent;
|
||||
struct device_node *np = dev->of_node;
|
||||
struct rproc_mem_entry *mem;
|
||||
struct reserved_mem *rmem;
|
||||
struct of_phandle_iterator it;
|
||||
int index = 0;
|
||||
|
||||
dev_dbg(dev, "bl808_rproc_parse_fw %s", np->name);
|
||||
|
||||
of_phandle_iterator_init(&it, np, "memory-region", NULL, 0);
|
||||
while (of_phandle_iterator_next(&it) == 0) {
|
||||
dev_dbg(dev, "memory-region %s", it.node->name);
|
||||
rmem = of_reserved_mem_lookup(it.node);
|
||||
if (!rmem) {
|
||||
dev_err(dev, "unable to acquire memory-region\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
dev_dbg(dev, "memory-region %s", it.node->name);
|
||||
|
||||
/* No need to map vdev buffer */
|
||||
if (strcmp(it.node->name, "vdev0buffer")) {
|
||||
/* Register memory region */
|
||||
dev_dbg(dev, "registering memory region %s", it.node->name);
|
||||
mem = rproc_mem_entry_init(dev, NULL,
|
||||
(dma_addr_t)rmem->base,
|
||||
rmem->size, rmem->base,
|
||||
bl808_rproc_mem_alloc,
|
||||
bl808_rproc_mem_release,
|
||||
it.node->name);
|
||||
} else {
|
||||
/* Register reserved memory for vdev buffer allocation */
|
||||
dev_dbg(dev, "registering reserved memory region %s", it.node->name);
|
||||
mem = rproc_of_resm_mem_entry_init(dev, index,
|
||||
rmem->size,
|
||||
rmem->base,
|
||||
it.node->name);
|
||||
}
|
||||
|
||||
if (!mem) {
|
||||
dev_err(dev, "unable to allocate memory entry %s", it.node->name);
|
||||
return -ENOMEM;
|
||||
}
|
||||
rproc_add_carveout(rproc, mem);
|
||||
index++;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/* M0 is already started. Do Nothing
|
||||
*/
|
||||
static int bl808_rproc_start(struct rproc *rproc)
|
||||
{
|
||||
struct device *dev = rproc->dev.parent;
|
||||
|
||||
dev_dbg(dev, "bl808_rproc_start");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* We don't want to stop M0, as it will crash. Do Nothing
|
||||
*/
|
||||
static int bl808_rproc_stop(struct rproc *rproc)
|
||||
{
|
||||
struct device *dev = rproc->dev.parent;
|
||||
|
||||
dev_dbg(dev, "bl808_rproc_stop");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* kick the virtqueue to let M0 know there is a update to the vring
|
||||
*/
|
||||
static void bl808_rproc_kick(struct rproc *rproc, int vqid)
|
||||
{
|
||||
struct device *dev = rproc->dev.parent;
|
||||
struct bl808_rproc *drproc = (struct bl808_rproc *)rproc->priv;
|
||||
|
||||
/* Kick the other CPU to let it know the vrings are updated */
|
||||
dev_dbg(dev, "bl808_rproc_kick %d", vqid);
|
||||
mbox_send_message(drproc->mbox, (void*)vqid);
|
||||
}
|
||||
|
||||
/* M0 signaled us there is a update on the vring, check it
|
||||
*/
|
||||
static void bflb_rproc_mbox_callback(struct mbox_client *client, void *data)
|
||||
{
|
||||
struct device *dev = client->dev;
|
||||
struct rproc *rproc = dev_get_drvdata(dev);
|
||||
u32 vqid = (u32)data;
|
||||
|
||||
dev_dbg(dev, "bflb_rproc_mbox_callback %d", vqid);
|
||||
|
||||
if (vqid > 0 && vqid < 3)
|
||||
rproc_vq_interrupt(rproc, vqid);
|
||||
else
|
||||
dev_err(dev, "bflb_rproc_mbox_callback: Invalid vqid %d", vqid);
|
||||
}
|
||||
|
||||
/* M0 is already running when we boot
|
||||
* so just attach to it.
|
||||
* we also register a mailbox to get kicks from M0 when vrings are updated
|
||||
*/
|
||||
static int bl808_rproc_attach(struct rproc *rproc)
|
||||
{
|
||||
struct device *dev = &rproc->dev;
|
||||
struct bl808_rproc *drproc = (struct bl808_rproc *)rproc->priv;
|
||||
int ret;
|
||||
|
||||
/* request the mailbox */
|
||||
struct mbox_client *vq1_mbox = &drproc->client;
|
||||
vq1_mbox->dev = dev->parent;
|
||||
dev_dbg(vq1_mbox->dev, "bl808_rproc_attachasdfadfsdf: Attaching to %s", rproc->name);
|
||||
vq1_mbox->tx_done = NULL;
|
||||
vq1_mbox->rx_callback = bflb_rproc_mbox_callback;
|
||||
vq1_mbox->tx_block = false;
|
||||
vq1_mbox->knows_txdone = false;
|
||||
|
||||
drproc->mbox = mbox_request_channel(vq1_mbox, 0);
|
||||
if (IS_ERR(drproc->mbox)) {
|
||||
ret = -EBUSY;
|
||||
dev_err(dev, "mbox_request_channel failed: %ld\n",
|
||||
PTR_ERR(drproc->mbox));
|
||||
return ret;
|
||||
}
|
||||
|
||||
dev_dbg(dev, "bl808_rproc_attach: Attaching to %s", rproc->name);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Detach. Do Nothing? */
|
||||
|
||||
static int bl808_rproc_detach(struct rproc *rproc)
|
||||
{
|
||||
struct device *dev = rproc->dev.parent;
|
||||
|
||||
dev_dbg(dev, "bl808_rproc_detach: Detaching from %s", rproc->name);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct rproc_ops bl808_rproc_ops = {
|
||||
.start = bl808_rproc_start,
|
||||
.stop = bl808_rproc_stop,
|
||||
.attach = bl808_rproc_attach,
|
||||
.detach = bl808_rproc_detach,
|
||||
.kick = bl808_rproc_kick,
|
||||
.prepare = bl808_rproc_setupmem,
|
||||
.get_loaded_rsc_table = bl808_rproc_get_loaded_rsc_table,
|
||||
};
|
||||
|
||||
|
||||
static int bl808_rproc_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device *dev = &pdev->dev;
|
||||
struct bl808_rproc *drproc;
|
||||
struct rproc *rproc;
|
||||
int ret;
|
||||
|
||||
dev_dbg(dev, "bl808_rproc_probe ");
|
||||
|
||||
rproc = rproc_alloc(dev, "M0", &bl808_rproc_ops, NULL,
|
||||
sizeof(*drproc));
|
||||
if (!rproc) {
|
||||
ret = -ENOMEM;
|
||||
goto free_mem;
|
||||
}
|
||||
|
||||
/* error recovery is not supported at present */
|
||||
rproc->recovery_disabled = true;
|
||||
|
||||
/* M0 is running when linux boots */
|
||||
//atomic_inc(&rproc->power);
|
||||
rproc->state = RPROC_DETACHED;
|
||||
|
||||
drproc = rproc->priv;
|
||||
drproc->rproc = rproc;
|
||||
rproc->has_iommu = false;
|
||||
|
||||
ret = rproc_add(rproc);
|
||||
if (ret) {
|
||||
dev_err(dev, "rproc_add failed: %d\n", ret);
|
||||
goto free_rproc;
|
||||
}
|
||||
|
||||
platform_set_drvdata(pdev, rproc);
|
||||
|
||||
dev_dbg(dev, "rproc_add success");
|
||||
|
||||
return 0;
|
||||
|
||||
free_rproc:
|
||||
rproc_free(rproc);
|
||||
free_mem:
|
||||
if (dev->of_node)
|
||||
of_reserved_mem_device_release(dev);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int bl808_rproc_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct rproc *rproc = platform_get_drvdata(pdev);
|
||||
struct device *dev = &pdev->dev;
|
||||
|
||||
dev_dbg(dev, "bl808_rproc_remove");
|
||||
|
||||
/*XXX TODO: we need to unregister our mailbox? */
|
||||
|
||||
rproc_del(rproc);
|
||||
rproc_free(rproc);
|
||||
if (dev->of_node)
|
||||
of_reserved_mem_device_release(dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id davinci_rproc_of_match[] __maybe_unused = {
|
||||
{ .compatible = "bflb,bl808-rproc", },
|
||||
{ /* sentinel */ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, davinci_rproc_of_match);
|
||||
|
||||
static struct platform_driver bl808_rproc_driver = {
|
||||
.probe = bl808_rproc_probe,
|
||||
.remove = bl808_rproc_remove,
|
||||
.driver = {
|
||||
.name = "bl808-rproc",
|
||||
.of_match_table = of_match_ptr(davinci_rproc_of_match),
|
||||
},
|
||||
};
|
||||
|
||||
module_platform_driver(bl808_rproc_driver);
|
||||
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_AUTHOR("justin@dynam.ac");
|
||||
MODULE_DESCRIPTION("bl808 Remote Processor control driver");
|
||||
Loading…
Add table
Reference in a new issue