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remoteproc: uclass: Add remoteproc resource handling helpers
Add remoteproc resource handling helpers. These functions are primarily to parse the resource table and to handle different types of resources. Carveout, devmem, trace & vring resources are handled. Signed-off-by: Keerthy <j-keerthy@ti.com> [Amjad: fix redefinition of "struct resource_table" and compile warnings ] Signed-off-by: Amjad Ouled-Ameur <aouledameur@baylibre.com>
This commit is contained in:
Keerthy
Tom Rini
parent
8a92603a34
commit
a03df89844
@ -8,15 +8,31 @@
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#define pr_fmt(fmt) "%s: " fmt, __func__
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#include <common.h>
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#include <elf.h>
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#include <errno.h>
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#include <log.h>
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#include <malloc.h>
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#include <virtio_ring.h>
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#include <remoteproc.h>
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#include <asm/io.h>
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#include <dm/device-internal.h>
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#include <dm.h>
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#include <dm/uclass.h>
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#include <dm/uclass-internal.h>
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#include <linux/compat.h>
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DECLARE_GLOBAL_DATA_PTR;
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struct resource_table {
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u32 ver;
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u32 num;
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u32 reserved[2];
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u32 offset[0];
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} __packed;
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typedef int (*handle_resource_t) (struct udevice *, void *, int offset, int avail);
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static struct resource_table *rsc_table;
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/**
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* for_each_remoteproc_device() - iterate through the list of rproc devices
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@ -196,6 +212,80 @@ static int rproc_post_probe(struct udevice *dev)
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return 0;
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}
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/**
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* rproc_add_res() - After parsing the resource table add the mappings
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* @dev: device we finished probing
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* @mapping: rproc_mem_entry for the resource
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*
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* Return: if the remote proc driver has a add_res routine, invokes it and
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* hands over the return value. overall, 0 if all went well, else appropriate
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* error value.
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*/
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static int rproc_add_res(struct udevice *dev, struct rproc_mem_entry *mapping)
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{
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const struct dm_rproc_ops *ops = rproc_get_ops(dev);
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if (!ops->add_res)
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return -ENOSYS;
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return ops->add_res(dev, mapping);
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}
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/**
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* rproc_alloc_mem() - After parsing the resource table allocat mem
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* @dev: device we finished probing
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* @len: rproc_mem_entry for the resource
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* @align: alignment for the resource
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*
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* Return: if the remote proc driver has a add_res routine, invokes it and
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* hands over the return value. overall, 0 if all went well, else appropriate
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* error value.
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*/
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static void *rproc_alloc_mem(struct udevice *dev, unsigned long len,
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unsigned long align)
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{
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const struct dm_rproc_ops *ops;
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ops = rproc_get_ops(dev);
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if (!ops) {
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debug("%s driver has no ops?\n", dev->name);
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return NULL;
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}
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if (ops->alloc_mem)
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return ops->alloc_mem(dev, len, align);
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return NULL;
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}
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/**
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* rproc_config_pagetable() - Configure page table for remote processor
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* @dev: device we finished probing
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* @virt: Virtual address of the resource
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* @phys: Physical address the resource
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* @len: length the resource
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*
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* Return: if the remote proc driver has a add_res routine, invokes it and
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* hands over the return value. overall, 0 if all went well, else appropriate
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* error value.
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*/
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static int rproc_config_pagetable(struct udevice *dev, unsigned int virt,
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unsigned int phys, unsigned int len)
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{
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const struct dm_rproc_ops *ops;
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ops = rproc_get_ops(dev);
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if (!ops) {
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debug("%s driver has no ops?\n", dev->name);
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return -EINVAL;
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}
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if (ops->config_pagetable)
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return ops->config_pagetable(dev, virt, phys, len);
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return 0;
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}
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UCLASS_DRIVER(rproc) = {
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.id = UCLASS_REMOTEPROC,
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.name = "remoteproc",
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@ -426,3 +516,447 @@ int rproc_is_running(int id)
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{
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return _rproc_ops_wrapper(id, RPROC_RUNNING);
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};
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static int handle_trace(struct udevice *dev, struct fw_rsc_trace *rsc,
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int offset, int avail)
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{
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if (sizeof(*rsc) > avail) {
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debug("trace rsc is truncated\n");
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return -EINVAL;
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}
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/*
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* make sure reserved bytes are zeroes
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*/
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if (rsc->reserved) {
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debug("trace rsc has non zero reserved bytes\n");
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return -EINVAL;
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}
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debug("trace rsc: da 0x%x, len 0x%x\n", rsc->da, rsc->len);
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return 0;
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}
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static int handle_devmem(struct udevice *dev, struct fw_rsc_devmem *rsc,
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int offset, int avail)
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{
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struct rproc_mem_entry *mapping;
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if (sizeof(*rsc) > avail) {
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debug("devmem rsc is truncated\n");
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return -EINVAL;
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}
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/*
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* make sure reserved bytes are zeroes
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*/
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if (rsc->reserved) {
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debug("devmem rsc has non zero reserved bytes\n");
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return -EINVAL;
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}
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debug("devmem rsc: pa 0x%x, da 0x%x, len 0x%x\n",
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rsc->pa, rsc->da, rsc->len);
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rproc_config_pagetable(dev, rsc->da, rsc->pa, rsc->len);
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mapping = kzalloc(sizeof(*mapping), GFP_KERNEL);
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if (!mapping)
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return -ENOMEM;
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/*
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* We'll need this info later when we'll want to unmap everything
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* (e.g. on shutdown).
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*
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* We can't trust the remote processor not to change the resource
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* table, so we must maintain this info independently.
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*/
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mapping->dma = rsc->pa;
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mapping->da = rsc->da;
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mapping->len = rsc->len;
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rproc_add_res(dev, mapping);
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debug("mapped devmem pa 0x%x, da 0x%x, len 0x%x\n",
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rsc->pa, rsc->da, rsc->len);
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return 0;
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}
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static int handle_carveout(struct udevice *dev, struct fw_rsc_carveout *rsc,
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int offset, int avail)
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{
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struct rproc_mem_entry *mapping;
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if (sizeof(*rsc) > avail) {
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debug("carveout rsc is truncated\n");
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return -EINVAL;
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}
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/*
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* make sure reserved bytes are zeroes
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*/
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if (rsc->reserved) {
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debug("carveout rsc has non zero reserved bytes\n");
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return -EINVAL;
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}
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debug("carveout rsc: da %x, pa %x, len %x, flags %x\n",
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rsc->da, rsc->pa, rsc->len, rsc->flags);
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rsc->pa = (uintptr_t)rproc_alloc_mem(dev, rsc->len, 8);
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if (!rsc->pa) {
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debug
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("failed to allocate carveout rsc: da %x, pa %x, len %x, flags %x\n",
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rsc->da, rsc->pa, rsc->len, rsc->flags);
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return -ENOMEM;
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}
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rproc_config_pagetable(dev, rsc->da, rsc->pa, rsc->len);
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/*
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* Ok, this is non-standard.
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*
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* Sometimes we can't rely on the generic iommu-based DMA API
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* to dynamically allocate the device address and then set the IOMMU
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* tables accordingly, because some remote processors might
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* _require_ us to use hard coded device addresses that their
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* firmware was compiled with.
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*
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* In this case, we must use the IOMMU API directly and map
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* the memory to the device address as expected by the remote
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* processor.
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*
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* Obviously such remote processor devices should not be configured
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* to use the iommu-based DMA API: we expect 'dma' to contain the
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* physical address in this case.
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*/
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mapping = kzalloc(sizeof(*mapping), GFP_KERNEL);
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if (!mapping)
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return -ENOMEM;
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/*
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* We'll need this info later when we'll want to unmap
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* everything (e.g. on shutdown).
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*
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* We can't trust the remote processor not to change the
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* resource table, so we must maintain this info independently.
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*/
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mapping->dma = rsc->pa;
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mapping->da = rsc->da;
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mapping->len = rsc->len;
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rproc_add_res(dev, mapping);
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debug("carveout mapped 0x%x to 0x%x\n", rsc->da, rsc->pa);
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return 0;
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}
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#define RPROC_PAGE_SHIFT 12
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#define RPROC_PAGE_SIZE BIT(RPROC_PAGE_SHIFT)
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#define RPROC_PAGE_ALIGN(x) (((x) + (RPROC_PAGE_SIZE - 1)) & ~(RPROC_PAGE_SIZE - 1))
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static int alloc_vring(struct udevice *dev, struct fw_rsc_vdev *rsc, int i)
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{
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struct fw_rsc_vdev_vring *vring = &rsc->vring[i];
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int size;
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int order;
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void *pa;
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debug("vdev rsc: vring%d: da %x, qsz %d, align %d\n",
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i, vring->da, vring->num, vring->align);
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/*
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* verify queue size and vring alignment are sane
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*/
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if (!vring->num || !vring->align) {
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debug("invalid qsz (%d) or alignment (%d)\n", vring->num,
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vring->align);
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return -EINVAL;
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}
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/*
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* actual size of vring (in bytes)
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*/
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size = RPROC_PAGE_ALIGN(vring_size(vring->num, vring->align));
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order = vring->align >> RPROC_PAGE_SHIFT;
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pa = rproc_alloc_mem(dev, size, order);
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if (!pa) {
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debug("failed to allocate vring rsc\n");
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return -ENOMEM;
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}
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debug("alloc_mem(%#x, %d): %p\n", size, order, pa);
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vring->da = (uintptr_t)pa;
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return !pa;
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}
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static int handle_vdev(struct udevice *dev, struct fw_rsc_vdev *rsc,
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int offset, int avail)
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{
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int i, ret;
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void *pa;
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/*
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* make sure resource isn't truncated
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*/
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if (sizeof(*rsc) + rsc->num_of_vrings * sizeof(struct fw_rsc_vdev_vring)
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+ rsc->config_len > avail) {
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debug("vdev rsc is truncated\n");
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return -EINVAL;
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}
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/*
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* make sure reserved bytes are zeroes
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*/
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if (rsc->reserved[0] || rsc->reserved[1]) {
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debug("vdev rsc has non zero reserved bytes\n");
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return -EINVAL;
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}
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debug("vdev rsc: id %d, dfeatures %x, cfg len %d, %d vrings\n",
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rsc->id, rsc->dfeatures, rsc->config_len, rsc->num_of_vrings);
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/*
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* we currently support only two vrings per rvdev
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*/
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if (rsc->num_of_vrings > 2) {
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debug("too many vrings: %d\n", rsc->num_of_vrings);
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return -EINVAL;
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}
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/*
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* allocate the vrings
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*/
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for (i = 0; i < rsc->num_of_vrings; i++) {
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ret = alloc_vring(dev, rsc, i);
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if (ret)
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goto alloc_error;
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}
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pa = rproc_alloc_mem(dev, RPMSG_TOTAL_BUF_SPACE, 6);
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if (!pa) {
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debug("failed to allocate vdev rsc\n");
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return -ENOMEM;
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}
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debug("vring buffer alloc_mem(%#x, 6): %p\n", RPMSG_TOTAL_BUF_SPACE,
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pa);
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return 0;
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alloc_error:
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return ret;
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}
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/*
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* A lookup table for resource handlers. The indices are defined in
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* enum fw_resource_type.
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*/
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static handle_resource_t loading_handlers[RSC_LAST] = {
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[RSC_CARVEOUT] = (handle_resource_t)handle_carveout,
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[RSC_DEVMEM] = (handle_resource_t)handle_devmem,
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[RSC_TRACE] = (handle_resource_t)handle_trace,
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[RSC_VDEV] = (handle_resource_t)handle_vdev,
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};
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/*
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* handle firmware resource entries before booting the remote processor
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*/
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static int handle_resources(struct udevice *dev, int len,
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handle_resource_t handlers[RSC_LAST])
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{
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handle_resource_t handler;
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int ret = 0, i;
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for (i = 0; i < rsc_table->num; i++) {
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int offset = rsc_table->offset[i];
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struct fw_rsc_hdr *hdr = (void *)rsc_table + offset;
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int avail = len - offset - sizeof(*hdr);
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void *rsc = (void *)hdr + sizeof(*hdr);
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/*
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* make sure table isn't truncated
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*/
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if (avail < 0) {
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debug("rsc table is truncated\n");
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return -EINVAL;
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}
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debug("rsc: type %d\n", hdr->type);
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if (hdr->type >= RSC_LAST) {
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debug("unsupported resource %d\n", hdr->type);
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continue;
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}
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handler = handlers[hdr->type];
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if (!handler)
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continue;
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ret = handler(dev, rsc, offset + sizeof(*hdr), avail);
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if (ret)
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break;
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}
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return ret;
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}
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static int
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handle_intmem_to_l3_mapping(struct udevice *dev,
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struct rproc_intmem_to_l3_mapping *l3_mapping)
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{
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u32 i = 0;
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for (i = 0; i < l3_mapping->num_entries; i++) {
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struct l3_map *curr_map = &l3_mapping->mappings[i];
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struct rproc_mem_entry *mapping;
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mapping = kzalloc(sizeof(*mapping), GFP_KERNEL);
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if (!mapping)
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return -ENOMEM;
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mapping->dma = curr_map->l3_addr;
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mapping->da = curr_map->priv_addr;
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mapping->len = curr_map->len;
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rproc_add_res(dev, mapping);
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}
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return 0;
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}
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static Elf32_Shdr *rproc_find_table(unsigned int addr)
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{
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Elf32_Ehdr *ehdr; /* Elf header structure pointer */
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Elf32_Shdr *shdr; /* Section header structure pointer */
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Elf32_Shdr sectionheader;
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int i;
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u8 *elf_data;
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char *name_table;
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struct resource_table *ptable;
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ehdr = (Elf32_Ehdr *)(uintptr_t)addr;
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elf_data = (u8 *)ehdr;
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shdr = (Elf32_Shdr *)(elf_data + ehdr->e_shoff);
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memcpy(§ionheader, &shdr[ehdr->e_shstrndx], sizeof(sectionheader));
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name_table = (char *)(elf_data + sectionheader.sh_offset);
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for (i = 0; i < ehdr->e_shnum; i++, shdr++) {
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memcpy(§ionheader, shdr, sizeof(sectionheader));
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u32 size = sectionheader.sh_size;
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u32 offset = sectionheader.sh_offset;
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if (strcmp
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(name_table + sectionheader.sh_name, ".resource_table"))
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continue;
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ptable = (struct resource_table *)(elf_data + offset);
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/*
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* make sure table has at least the header
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*/
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if (sizeof(struct resource_table) > size) {
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debug("header-less resource table\n");
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return NULL;
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}
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/*
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* we don't support any version beyond the first
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*/
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if (ptable->ver != 1) {
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debug("unsupported fw ver: %d\n", ptable->ver);
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return NULL;
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}
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/*
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* make sure reserved bytes are zeroes
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*/
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if (ptable->reserved[0] || ptable->reserved[1]) {
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debug("non zero reserved bytes\n");
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return NULL;
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}
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/*
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* make sure the offsets array isn't truncated
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*/
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if (ptable->num * sizeof(ptable->offset[0]) +
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sizeof(struct resource_table) > size) {
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debug("resource table incomplete\n");
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return NULL;
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}
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return shdr;
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}
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return NULL;
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}
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struct resource_table *rproc_find_resource_table(struct udevice *dev,
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unsigned int addr,
|
||||
int *tablesz)
|
||||
{
|
||||
Elf32_Shdr *shdr;
|
||||
Elf32_Shdr sectionheader;
|
||||
struct resource_table *ptable;
|
||||
u8 *elf_data = (u8 *)(uintptr_t)addr;
|
||||
|
||||
shdr = rproc_find_table(addr);
|
||||
if (!shdr) {
|
||||
debug("%s: failed to get resource section header\n", __func__);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
memcpy(§ionheader, shdr, sizeof(sectionheader));
|
||||
ptable = (struct resource_table *)(elf_data + sectionheader.sh_offset);
|
||||
if (tablesz)
|
||||
*tablesz = sectionheader.sh_size;
|
||||
|
||||
return ptable;
|
||||
}
|
||||
|
||||
unsigned long rproc_parse_resource_table(struct udevice *dev, struct rproc *cfg)
|
||||
{
|
||||
struct resource_table *ptable = NULL;
|
||||
int tablesz;
|
||||
int ret;
|
||||
unsigned long addr;
|
||||
|
||||
addr = cfg->load_addr;
|
||||
|
||||
ptable = rproc_find_resource_table(dev, addr, &tablesz);
|
||||
if (!ptable) {
|
||||
debug("%s : failed to find resource table\n", __func__);
|
||||
return 0;
|
||||
}
|
||||
|
||||
debug("%s : found resource table\n", __func__);
|
||||
rsc_table = kzalloc(tablesz, GFP_KERNEL);
|
||||
if (!rsc_table) {
|
||||
debug("resource table alloc failed!\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Copy the resource table into a local buffer before handling the
|
||||
* resource table.
|
||||
*/
|
||||
memcpy(rsc_table, ptable, tablesz);
|
||||
if (cfg->intmem_to_l3_mapping)
|
||||
handle_intmem_to_l3_mapping(dev, cfg->intmem_to_l3_mapping);
|
||||
ret = handle_resources(dev, tablesz, loading_handlers);
|
||||
if (ret) {
|
||||
debug("handle_resources failed: %d\n", ret);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Instead of trying to mimic the kernel flow of copying the
|
||||
* processed resource table into its post ELF load location in DDR
|
||||
* copying it into its original location.
|
||||
*/
|
||||
memcpy(ptable, rsc_table, tablesz);
|
||||
free(rsc_table);
|
||||
rsc_table = NULL;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
/* SPDX-License-Identifier: GPL-2.0+ */
|
||||
/* SPDX-License-Identifier: GPL-2.0 */
|
||||
/*
|
||||
* (C) Copyright 2015
|
||||
* Texas Instruments Incorporated - http://www.ti.com/
|
||||
@ -15,6 +15,375 @@
|
||||
*/
|
||||
#include <dm/platdata.h> /* For platform data support - non dt world */
|
||||
|
||||
/**
|
||||
* struct fw_rsc_hdr - firmware resource entry header
|
||||
* @type: resource type
|
||||
* @data: resource data
|
||||
*
|
||||
* Every resource entry begins with a 'struct fw_rsc_hdr' header providing
|
||||
* its @type. The content of the entry itself will immediately follow
|
||||
* this header, and it should be parsed according to the resource type.
|
||||
*/
|
||||
struct fw_rsc_hdr {
|
||||
u32 type;
|
||||
u8 data[0];
|
||||
};
|
||||
|
||||
/**
|
||||
* enum fw_resource_type - types of resource entries
|
||||
*
|
||||
* @RSC_CARVEOUT: request for allocation of a physically contiguous
|
||||
* memory region.
|
||||
* @RSC_DEVMEM: request to iommu_map a memory-based peripheral.
|
||||
* @RSC_TRACE: announces the availability of a trace buffer into which
|
||||
* the remote processor will be writing logs.
|
||||
* @RSC_VDEV: declare support for a virtio device, and serve as its
|
||||
* virtio header.
|
||||
* @RSC_PRELOAD_VENDOR: a vendor resource type that needs to be handled by
|
||||
* remoteproc implementations before loading
|
||||
* @RSC_POSTLOAD_VENDOR: a vendor resource type that needs to be handled by
|
||||
* remoteproc implementations after loading
|
||||
* @RSC_LAST: just keep this one at the end
|
||||
*
|
||||
* For more details regarding a specific resource type, please see its
|
||||
* dedicated structure below.
|
||||
*
|
||||
* Please note that these values are used as indices to the rproc_handle_rsc
|
||||
* lookup table, so please keep them sane. Moreover, @RSC_LAST is used to
|
||||
* check the validity of an index before the lookup table is accessed, so
|
||||
* please update it as needed.
|
||||
*/
|
||||
enum fw_resource_type {
|
||||
RSC_CARVEOUT = 0,
|
||||
RSC_DEVMEM = 1,
|
||||
RSC_TRACE = 2,
|
||||
RSC_VDEV = 3,
|
||||
RSC_PRELOAD_VENDOR = 4,
|
||||
RSC_POSTLOAD_VENDOR = 5,
|
||||
RSC_LAST = 6,
|
||||
};
|
||||
|
||||
#define FW_RSC_ADDR_ANY (-1)
|
||||
|
||||
/**
|
||||
* struct fw_rsc_carveout - physically contiguous memory request
|
||||
* @da: device address
|
||||
* @pa: physical address
|
||||
* @len: length (in bytes)
|
||||
* @flags: iommu protection flags
|
||||
* @reserved: reserved (must be zero)
|
||||
* @name: human-readable name of the requested memory region
|
||||
*
|
||||
* This resource entry requests the host to allocate a physically contiguous
|
||||
* memory region.
|
||||
*
|
||||
* These request entries should precede other firmware resource entries,
|
||||
* as other entries might request placing other data objects inside
|
||||
* these memory regions (e.g. data/code segments, trace resource entries, ...).
|
||||
*
|
||||
* Allocating memory this way helps utilizing the reserved physical memory
|
||||
* (e.g. CMA) more efficiently, and also minimizes the number of TLB entries
|
||||
* needed to map it (in case @rproc is using an IOMMU). Reducing the TLB
|
||||
* pressure is important; it may have a substantial impact on performance.
|
||||
*
|
||||
* If the firmware is compiled with static addresses, then @da should specify
|
||||
* the expected device address of this memory region. If @da is set to
|
||||
* FW_RSC_ADDR_ANY, then the host will dynamically allocate it, and then
|
||||
* overwrite @da with the dynamically allocated address.
|
||||
*
|
||||
* We will always use @da to negotiate the device addresses, even if it
|
||||
* isn't using an iommu. In that case, though, it will obviously contain
|
||||
* physical addresses.
|
||||
*
|
||||
* Some remote processors needs to know the allocated physical address
|
||||
* even if they do use an iommu. This is needed, e.g., if they control
|
||||
* hardware accelerators which access the physical memory directly (this
|
||||
* is the case with OMAP4 for instance). In that case, the host will
|
||||
* overwrite @pa with the dynamically allocated physical address.
|
||||
* Generally we don't want to expose physical addresses if we don't have to
|
||||
* (remote processors are generally _not_ trusted), so we might want to
|
||||
* change this to happen _only_ when explicitly required by the hardware.
|
||||
*
|
||||
* @flags is used to provide IOMMU protection flags, and @name should
|
||||
* (optionally) contain a human readable name of this carveout region
|
||||
* (mainly for debugging purposes).
|
||||
*/
|
||||
struct fw_rsc_carveout {
|
||||
u32 da;
|
||||
u32 pa;
|
||||
u32 len;
|
||||
u32 flags;
|
||||
u32 reserved;
|
||||
u8 name[32];
|
||||
};
|
||||
|
||||
/**
|
||||
* struct fw_rsc_devmem - iommu mapping request
|
||||
* @da: device address
|
||||
* @pa: physical address
|
||||
* @len: length (in bytes)
|
||||
* @flags: iommu protection flags
|
||||
* @reserved: reserved (must be zero)
|
||||
* @name: human-readable name of the requested region to be mapped
|
||||
*
|
||||
* This resource entry requests the host to iommu map a physically contiguous
|
||||
* memory region. This is needed in case the remote processor requires
|
||||
* access to certain memory-based peripherals; _never_ use it to access
|
||||
* regular memory.
|
||||
*
|
||||
* This is obviously only needed if the remote processor is accessing memory
|
||||
* via an iommu.
|
||||
*
|
||||
* @da should specify the required device address, @pa should specify
|
||||
* the physical address we want to map, @len should specify the size of
|
||||
* the mapping and @flags is the IOMMU protection flags. As always, @name may
|
||||
* (optionally) contain a human readable name of this mapping (mainly for
|
||||
* debugging purposes).
|
||||
*
|
||||
* Note: at this point we just "trust" those devmem entries to contain valid
|
||||
* physical addresses, but this isn't safe and will be changed: eventually we
|
||||
* want remoteproc implementations to provide us ranges of physical addresses
|
||||
* the firmware is allowed to request, and not allow firmwares to request
|
||||
* access to physical addresses that are outside those ranges.
|
||||
*/
|
||||
struct fw_rsc_devmem {
|
||||
u32 da;
|
||||
u32 pa;
|
||||
u32 len;
|
||||
u32 flags;
|
||||
u32 reserved;
|
||||
u8 name[32];
|
||||
};
|
||||
|
||||
/**
|
||||
* struct fw_rsc_trace - trace buffer declaration
|
||||
* @da: device address
|
||||
* @len: length (in bytes)
|
||||
* @reserved: reserved (must be zero)
|
||||
* @name: human-readable name of the trace buffer
|
||||
*
|
||||
* This resource entry provides the host information about a trace buffer
|
||||
* into which the remote processor will write log messages.
|
||||
*
|
||||
* @da specifies the device address of the buffer, @len specifies
|
||||
* its size, and @name may contain a human readable name of the trace buffer.
|
||||
*
|
||||
* After booting the remote processor, the trace buffers are exposed to the
|
||||
* user via debugfs entries (called trace0, trace1, etc..).
|
||||
*/
|
||||
struct fw_rsc_trace {
|
||||
u32 da;
|
||||
u32 len;
|
||||
u32 reserved;
|
||||
u8 name[32];
|
||||
};
|
||||
|
||||
/**
|
||||
* struct fw_rsc_vdev_vring - vring descriptor entry
|
||||
* @da: device address
|
||||
* @align: the alignment between the consumer and producer parts of the vring
|
||||
* @num: num of buffers supported by this vring (must be power of two)
|
||||
* @notifyid is a unique rproc-wide notify index for this vring. This notify
|
||||
* index is used when kicking a remote processor, to let it know that this
|
||||
* vring is triggered.
|
||||
* @pa: physical address
|
||||
*
|
||||
* This descriptor is not a resource entry by itself; it is part of the
|
||||
* vdev resource type (see below).
|
||||
*
|
||||
* Note that @da should either contain the device address where
|
||||
* the remote processor is expecting the vring, or indicate that
|
||||
* dynamically allocation of the vring's device address is supported.
|
||||
*/
|
||||
struct fw_rsc_vdev_vring {
|
||||
u32 da;
|
||||
u32 align;
|
||||
u32 num;
|
||||
u32 notifyid;
|
||||
u32 pa;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct fw_rsc_vdev - virtio device header
|
||||
* @id: virtio device id (as in virtio_ids.h)
|
||||
* @notifyid is a unique rproc-wide notify index for this vdev. This notify
|
||||
* index is used when kicking a remote processor, to let it know that the
|
||||
* status/features of this vdev have changes.
|
||||
* @dfeatures specifies the virtio device features supported by the firmware
|
||||
* @gfeatures is a place holder used by the host to write back the
|
||||
* negotiated features that are supported by both sides.
|
||||
* @config_len is the size of the virtio config space of this vdev. The config
|
||||
* space lies in the resource table immediate after this vdev header.
|
||||
* @status is a place holder where the host will indicate its virtio progress.
|
||||
* @num_of_vrings indicates how many vrings are described in this vdev header
|
||||
* @reserved: reserved (must be zero)
|
||||
* @vring is an array of @num_of_vrings entries of 'struct fw_rsc_vdev_vring'.
|
||||
*
|
||||
* This resource is a virtio device header: it provides information about
|
||||
* the vdev, and is then used by the host and its peer remote processors
|
||||
* to negotiate and share certain virtio properties.
|
||||
*
|
||||
* By providing this resource entry, the firmware essentially asks remoteproc
|
||||
* to statically allocate a vdev upon registration of the rproc (dynamic vdev
|
||||
* allocation is not yet supported).
|
||||
*
|
||||
* Note: unlike virtualization systems, the term 'host' here means
|
||||
* the Linux side which is running remoteproc to control the remote
|
||||
* processors. We use the name 'gfeatures' to comply with virtio's terms,
|
||||
* though there isn't really any virtualized guest OS here: it's the host
|
||||
* which is responsible for negotiating the final features.
|
||||
* Yeah, it's a bit confusing.
|
||||
*
|
||||
* Note: immediately following this structure is the virtio config space for
|
||||
* this vdev (which is specific to the vdev; for more info, read the virtio
|
||||
* spec). the size of the config space is specified by @config_len.
|
||||
*/
|
||||
struct fw_rsc_vdev {
|
||||
u32 id;
|
||||
u32 notifyid;
|
||||
u32 dfeatures;
|
||||
u32 gfeatures;
|
||||
u32 config_len;
|
||||
u8 status;
|
||||
u8 num_of_vrings;
|
||||
u8 reserved[2];
|
||||
struct fw_rsc_vdev_vring vring[0];
|
||||
};
|
||||
|
||||
/**
|
||||
* struct rproc_mem_entry - memory entry descriptor
|
||||
* @va: virtual address
|
||||
* @dma: dma address
|
||||
* @len: length, in bytes
|
||||
* @da: device address
|
||||
* @priv: associated data
|
||||
* @name: associated memory region name (optional)
|
||||
* @node: list node
|
||||
*/
|
||||
struct rproc_mem_entry {
|
||||
void *va;
|
||||
dma_addr_t dma;
|
||||
int len;
|
||||
u32 da;
|
||||
void *priv;
|
||||
char name[32];
|
||||
struct list_head node;
|
||||
};
|
||||
|
||||
struct rproc;
|
||||
|
||||
typedef u32(*init_func_proto) (u32 core_id, struct rproc *cfg);
|
||||
|
||||
struct l3_map {
|
||||
u32 priv_addr;
|
||||
u32 l3_addr;
|
||||
u32 len;
|
||||
};
|
||||
|
||||
struct rproc_intmem_to_l3_mapping {
|
||||
u32 num_entries;
|
||||
struct l3_map mappings[16];
|
||||
};
|
||||
|
||||
/**
|
||||
* enum rproc_crash_type - remote processor crash types
|
||||
* @RPROC_MMUFAULT: iommu fault
|
||||
* @RPROC_WATCHDOG: watchdog bite
|
||||
* @RPROC_FATAL_ERROR fatal error
|
||||
*
|
||||
* Each element of the enum is used as an array index. So that, the value of
|
||||
* the elements should be always something sane.
|
||||
*
|
||||
* Feel free to add more types when needed.
|
||||
*/
|
||||
enum rproc_crash_type {
|
||||
RPROC_MMUFAULT,
|
||||
RPROC_WATCHDOG,
|
||||
RPROC_FATAL_ERROR,
|
||||
};
|
||||
|
||||
/* we currently support only two vrings per rvdev */
|
||||
#define RVDEV_NUM_VRINGS 2
|
||||
|
||||
#define RPMSG_NUM_BUFS (512)
|
||||
#define RPMSG_BUF_SIZE (512)
|
||||
#define RPMSG_TOTAL_BUF_SPACE (RPMSG_NUM_BUFS * RPMSG_BUF_SIZE)
|
||||
|
||||
/**
|
||||
* struct rproc_vring - remoteproc vring state
|
||||
* @va: virtual address
|
||||
* @dma: dma address
|
||||
* @len: length, in bytes
|
||||
* @da: device address
|
||||
* @align: vring alignment
|
||||
* @notifyid: rproc-specific unique vring index
|
||||
* @rvdev: remote vdev
|
||||
* @vq: the virtqueue of this vring
|
||||
*/
|
||||
struct rproc_vring {
|
||||
void *va;
|
||||
dma_addr_t dma;
|
||||
int len;
|
||||
u32 da;
|
||||
u32 align;
|
||||
int notifyid;
|
||||
struct rproc_vdev *rvdev;
|
||||
struct virtqueue *vq;
|
||||
};
|
||||
|
||||
/** struct rproc - structure with all processor specific information for
|
||||
* loading remotecore from boot loader.
|
||||
*
|
||||
* @num_iommus: Number of IOMMUs for this remote core. Zero indicates that the
|
||||
* processor does not have an IOMMU.
|
||||
*
|
||||
* @cma_base: Base address of the carveout for this remotecore.
|
||||
*
|
||||
* @cma_size: Length of the carveout in bytes.
|
||||
*
|
||||
* @page_table_addr: array with the physical address of the page table. We are
|
||||
* using the same page table for both IOMMU's. There is currently no strong
|
||||
* usecase for maintaining different page tables for different MMU's servicing
|
||||
* the same CPU.
|
||||
*
|
||||
* @mmu_base_addr: base address of the MMU
|
||||
*
|
||||
* @entry_point: address that is the entry point for the remote core. This
|
||||
* address is in the memory view of the remotecore.
|
||||
*
|
||||
* @load_addr: Address to which the bootloader loads the firmware from
|
||||
* persistent storage before invoking the ELF loader. Keeping this address
|
||||
* configurable allows future optimizations such as loading the firmware from
|
||||
* storage for remotecore2 via EDMA while the CPU is processing the ELF image
|
||||
* of remotecore1. This address is in the memory view of the A15.
|
||||
*
|
||||
* @firmware_name: Name of the file that is expected to contain the ELF image.
|
||||
*
|
||||
* @has_rsc_table: Flag populated after parsing the ELF binary on target.
|
||||
*/
|
||||
|
||||
struct rproc {
|
||||
u32 num_iommus;
|
||||
unsigned long cma_base;
|
||||
u32 cma_size;
|
||||
unsigned long page_table_addr;
|
||||
unsigned long mmu_base_addr[2];
|
||||
unsigned long load_addr;
|
||||
unsigned long entry_point;
|
||||
char *core_name;
|
||||
char *firmware_name;
|
||||
char *ptn;
|
||||
init_func_proto start_clocks;
|
||||
init_func_proto config_mmu;
|
||||
init_func_proto config_peripherals;
|
||||
init_func_proto start_core;
|
||||
u32 has_rsc_table;
|
||||
struct rproc_intmem_to_l3_mapping *intmem_to_l3_mapping;
|
||||
u32 trace_pa;
|
||||
u32 trace_len;
|
||||
};
|
||||
|
||||
extern struct rproc *rproc_cfg_arr[2];
|
||||
/**
|
||||
* enum rproc_mem_type - What type of memory model does the rproc use
|
||||
* @RPROC_INTERNAL_MEMORY_MAPPED: Remote processor uses own memory and is memory
|
||||
@ -126,6 +495,12 @@ struct dm_rproc_ops {
|
||||
* @return virtual address.
|
||||
*/
|
||||
void * (*device_to_virt)(struct udevice *dev, ulong da, ulong size);
|
||||
int (*add_res)(struct udevice *dev,
|
||||
struct rproc_mem_entry *mapping);
|
||||
void * (*alloc_mem)(struct udevice *dev, unsigned long len,
|
||||
unsigned long align);
|
||||
unsigned int (*config_pagetable)(struct udevice *dev, unsigned int virt,
|
||||
unsigned int phys, unsigned int len);
|
||||
};
|
||||
|
||||
/* Accessor */
|
||||
@ -322,6 +697,13 @@ int rproc_elf64_load_rsc_table(struct udevice *dev, ulong fw_addr,
|
||||
*/
|
||||
int rproc_elf_load_rsc_table(struct udevice *dev, ulong fw_addr,
|
||||
ulong fw_size, ulong *rsc_addr, ulong *rsc_size);
|
||||
|
||||
unsigned long rproc_parse_resource_table(struct udevice *dev,
|
||||
struct rproc *cfg);
|
||||
|
||||
struct resource_table *rproc_find_resource_table(struct udevice *dev,
|
||||
unsigned int addr,
|
||||
int *tablesz);
|
||||
#else
|
||||
static inline int rproc_init(void) { return -ENOSYS; }
|
||||
static inline int rproc_dev_init(int id) { return -ENOSYS; }
|
||||
|
||||
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Reference in New Issue
Block a user