691 lines
14 KiB
C
691 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Tegra host1x Job
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*
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* Copyright (c) 2010-2015, NVIDIA Corporation.
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*/
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#include <linux/dma-mapping.h>
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#include <linux/err.h>
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#include <linux/host1x.h>
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#include <linux/iommu.h>
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#include <linux/kref.h>
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#include <linux/module.h>
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#include <linux/scatterlist.h>
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#include <linux/slab.h>
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#include <linux/vmalloc.h>
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#include <trace/events/host1x.h>
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#include "channel.h"
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#include "dev.h"
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#include "job.h"
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#include "syncpt.h"
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#define HOST1X_WAIT_SYNCPT_OFFSET 0x8
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struct host1x_job *host1x_job_alloc(struct host1x_channel *ch,
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u32 num_cmdbufs, u32 num_relocs,
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bool skip_firewall)
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{
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struct host1x_job *job = NULL;
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unsigned int num_unpins = num_relocs;
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bool enable_firewall;
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u64 total;
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void *mem;
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enable_firewall = IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL) && !skip_firewall;
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if (!enable_firewall)
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num_unpins += num_cmdbufs;
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/* Check that we're not going to overflow */
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total = sizeof(struct host1x_job) +
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(u64)num_relocs * sizeof(struct host1x_reloc) +
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(u64)num_unpins * sizeof(struct host1x_job_unpin_data) +
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(u64)num_cmdbufs * sizeof(struct host1x_job_cmd) +
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(u64)num_unpins * sizeof(dma_addr_t) +
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(u64)num_unpins * sizeof(u32 *);
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if (total > ULONG_MAX)
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return NULL;
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mem = job = kzalloc(total, GFP_KERNEL);
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if (!job)
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return NULL;
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job->enable_firewall = enable_firewall;
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kref_init(&job->ref);
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job->channel = ch;
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/* Redistribute memory to the structs */
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mem += sizeof(struct host1x_job);
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job->relocs = num_relocs ? mem : NULL;
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mem += num_relocs * sizeof(struct host1x_reloc);
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job->unpins = num_unpins ? mem : NULL;
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mem += num_unpins * sizeof(struct host1x_job_unpin_data);
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job->cmds = num_cmdbufs ? mem : NULL;
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mem += num_cmdbufs * sizeof(struct host1x_job_cmd);
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job->addr_phys = num_unpins ? mem : NULL;
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job->reloc_addr_phys = job->addr_phys;
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job->gather_addr_phys = &job->addr_phys[num_relocs];
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return job;
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}
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EXPORT_SYMBOL(host1x_job_alloc);
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struct host1x_job *host1x_job_get(struct host1x_job *job)
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{
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kref_get(&job->ref);
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return job;
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}
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EXPORT_SYMBOL(host1x_job_get);
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static void job_free(struct kref *ref)
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{
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struct host1x_job *job = container_of(ref, struct host1x_job, ref);
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if (job->release)
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job->release(job);
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if (job->fence) {
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/*
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* remove_callback is atomic w.r.t. fence signaling, so
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* after the call returns, we know that the callback is not
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* in execution, and the fence can be safely freed.
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*/
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dma_fence_remove_callback(job->fence, &job->fence_cb);
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dma_fence_put(job->fence);
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}
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if (job->syncpt)
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host1x_syncpt_put(job->syncpt);
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kfree(job);
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}
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void host1x_job_put(struct host1x_job *job)
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{
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kref_put(&job->ref, job_free);
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}
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EXPORT_SYMBOL(host1x_job_put);
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void host1x_job_add_gather(struct host1x_job *job, struct host1x_bo *bo,
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unsigned int words, unsigned int offset)
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{
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struct host1x_job_gather *gather = &job->cmds[job->num_cmds].gather;
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gather->words = words;
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gather->bo = bo;
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gather->offset = offset;
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job->num_cmds++;
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}
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EXPORT_SYMBOL(host1x_job_add_gather);
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void host1x_job_add_wait(struct host1x_job *job, u32 id, u32 thresh,
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bool relative, u32 next_class)
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{
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struct host1x_job_cmd *cmd = &job->cmds[job->num_cmds];
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cmd->is_wait = true;
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cmd->wait.id = id;
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cmd->wait.threshold = thresh;
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cmd->wait.next_class = next_class;
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cmd->wait.relative = relative;
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job->num_cmds++;
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}
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EXPORT_SYMBOL(host1x_job_add_wait);
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static unsigned int pin_job(struct host1x *host, struct host1x_job *job)
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{
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unsigned long mask = HOST1X_RELOC_READ | HOST1X_RELOC_WRITE;
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struct host1x_client *client = job->client;
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struct device *dev = client->dev;
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struct host1x_job_gather *g;
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unsigned int i;
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int err;
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job->num_unpins = 0;
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for (i = 0; i < job->num_relocs; i++) {
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struct host1x_reloc *reloc = &job->relocs[i];
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enum dma_data_direction direction;
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struct host1x_bo_mapping *map;
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struct host1x_bo *bo;
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reloc->target.bo = host1x_bo_get(reloc->target.bo);
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if (!reloc->target.bo) {
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err = -EINVAL;
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goto unpin;
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}
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bo = reloc->target.bo;
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switch (reloc->flags & mask) {
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case HOST1X_RELOC_READ:
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direction = DMA_TO_DEVICE;
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break;
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case HOST1X_RELOC_WRITE:
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direction = DMA_FROM_DEVICE;
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break;
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case HOST1X_RELOC_READ | HOST1X_RELOC_WRITE:
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direction = DMA_BIDIRECTIONAL;
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break;
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default:
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err = -EINVAL;
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goto unpin;
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}
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map = host1x_bo_pin(dev, bo, direction, NULL);
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if (IS_ERR(map)) {
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err = PTR_ERR(map);
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goto unpin;
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}
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/*
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* host1x clients are generally not able to do scatter-gather themselves, so fail
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* if the buffer is discontiguous and we fail to map its SG table to a single
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* contiguous chunk of I/O virtual memory.
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*/
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if (map->chunks > 1) {
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err = -EINVAL;
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goto unpin;
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}
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job->addr_phys[job->num_unpins] = map->phys;
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job->unpins[job->num_unpins].map = map;
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job->num_unpins++;
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}
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/*
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* We will copy gathers BO content later, so there is no need to
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* hold and pin them.
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*/
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if (job->enable_firewall)
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return 0;
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for (i = 0; i < job->num_cmds; i++) {
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struct host1x_bo_mapping *map;
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size_t gather_size = 0;
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struct scatterlist *sg;
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unsigned long shift;
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struct iova *alloc;
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unsigned int j;
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if (job->cmds[i].is_wait)
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continue;
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g = &job->cmds[i].gather;
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g->bo = host1x_bo_get(g->bo);
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if (!g->bo) {
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err = -EINVAL;
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goto unpin;
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}
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map = host1x_bo_pin(host->dev, g->bo, DMA_TO_DEVICE, NULL);
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if (IS_ERR(map)) {
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err = PTR_ERR(map);
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goto unpin;
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}
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if (host->domain) {
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for_each_sgtable_sg(map->sgt, sg, j)
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gather_size += sg->length;
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gather_size = iova_align(&host->iova, gather_size);
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shift = iova_shift(&host->iova);
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alloc = alloc_iova(&host->iova, gather_size >> shift,
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host->iova_end >> shift, true);
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if (!alloc) {
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err = -ENOMEM;
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goto put;
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}
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err = iommu_map_sgtable(host->domain, iova_dma_addr(&host->iova, alloc),
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map->sgt, IOMMU_READ);
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if (err == 0) {
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__free_iova(&host->iova, alloc);
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err = -EINVAL;
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goto put;
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}
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map->phys = iova_dma_addr(&host->iova, alloc);
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map->size = gather_size;
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}
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job->addr_phys[job->num_unpins] = map->phys;
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job->unpins[job->num_unpins].map = map;
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job->num_unpins++;
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job->gather_addr_phys[i] = map->phys;
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}
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return 0;
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put:
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host1x_bo_put(g->bo);
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unpin:
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host1x_job_unpin(job);
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return err;
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}
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static int do_relocs(struct host1x_job *job, struct host1x_job_gather *g)
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{
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void *cmdbuf_addr = NULL;
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struct host1x_bo *cmdbuf = g->bo;
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unsigned int i;
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/* pin & patch the relocs for one gather */
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for (i = 0; i < job->num_relocs; i++) {
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struct host1x_reloc *reloc = &job->relocs[i];
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u32 reloc_addr = (job->reloc_addr_phys[i] +
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reloc->target.offset) >> reloc->shift;
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u32 *target;
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/* skip all other gathers */
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if (cmdbuf != reloc->cmdbuf.bo)
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continue;
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if (job->enable_firewall) {
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target = (u32 *)job->gather_copy_mapped +
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reloc->cmdbuf.offset / sizeof(u32) +
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g->offset / sizeof(u32);
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goto patch_reloc;
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}
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if (!cmdbuf_addr) {
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cmdbuf_addr = host1x_bo_mmap(cmdbuf);
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if (unlikely(!cmdbuf_addr)) {
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pr_err("Could not map cmdbuf for relocation\n");
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return -ENOMEM;
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}
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}
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target = cmdbuf_addr + reloc->cmdbuf.offset;
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patch_reloc:
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*target = reloc_addr;
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}
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if (cmdbuf_addr)
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host1x_bo_munmap(cmdbuf, cmdbuf_addr);
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return 0;
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}
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static bool check_reloc(struct host1x_reloc *reloc, struct host1x_bo *cmdbuf,
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unsigned int offset)
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{
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offset *= sizeof(u32);
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if (reloc->cmdbuf.bo != cmdbuf || reloc->cmdbuf.offset != offset)
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return false;
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/* relocation shift value validation isn't implemented yet */
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if (reloc->shift)
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return false;
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return true;
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}
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struct host1x_firewall {
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struct host1x_job *job;
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struct device *dev;
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unsigned int num_relocs;
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struct host1x_reloc *reloc;
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struct host1x_bo *cmdbuf;
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unsigned int offset;
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u32 words;
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u32 class;
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u32 reg;
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u32 mask;
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u32 count;
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};
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static int check_register(struct host1x_firewall *fw, unsigned long offset)
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{
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if (!fw->job->is_addr_reg)
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return 0;
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if (fw->job->is_addr_reg(fw->dev, fw->class, offset)) {
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if (!fw->num_relocs)
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return -EINVAL;
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if (!check_reloc(fw->reloc, fw->cmdbuf, fw->offset))
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return -EINVAL;
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fw->num_relocs--;
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fw->reloc++;
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}
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return 0;
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}
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static int check_class(struct host1x_firewall *fw, u32 class)
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{
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if (!fw->job->is_valid_class) {
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if (fw->class != class)
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return -EINVAL;
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} else {
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if (!fw->job->is_valid_class(fw->class))
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return -EINVAL;
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}
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return 0;
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}
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static int check_mask(struct host1x_firewall *fw)
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{
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u32 mask = fw->mask;
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u32 reg = fw->reg;
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int ret;
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while (mask) {
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if (fw->words == 0)
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return -EINVAL;
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if (mask & 1) {
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ret = check_register(fw, reg);
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if (ret < 0)
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return ret;
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fw->words--;
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fw->offset++;
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}
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mask >>= 1;
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reg++;
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}
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return 0;
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}
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static int check_incr(struct host1x_firewall *fw)
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{
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u32 count = fw->count;
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u32 reg = fw->reg;
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int ret;
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while (count) {
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if (fw->words == 0)
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return -EINVAL;
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ret = check_register(fw, reg);
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if (ret < 0)
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return ret;
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reg++;
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fw->words--;
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fw->offset++;
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count--;
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}
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return 0;
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}
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static int check_nonincr(struct host1x_firewall *fw)
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{
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u32 count = fw->count;
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int ret;
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while (count) {
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if (fw->words == 0)
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return -EINVAL;
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ret = check_register(fw, fw->reg);
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if (ret < 0)
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return ret;
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fw->words--;
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fw->offset++;
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count--;
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}
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return 0;
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}
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static int validate(struct host1x_firewall *fw, struct host1x_job_gather *g)
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{
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u32 *cmdbuf_base = (u32 *)fw->job->gather_copy_mapped +
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(g->offset / sizeof(u32));
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u32 job_class = fw->class;
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int err = 0;
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fw->words = g->words;
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fw->cmdbuf = g->bo;
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fw->offset = 0;
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while (fw->words && !err) {
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u32 word = cmdbuf_base[fw->offset];
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u32 opcode = (word & 0xf0000000) >> 28;
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fw->mask = 0;
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fw->reg = 0;
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fw->count = 0;
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fw->words--;
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fw->offset++;
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switch (opcode) {
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case 0:
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fw->class = word >> 6 & 0x3ff;
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fw->mask = word & 0x3f;
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fw->reg = word >> 16 & 0xfff;
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err = check_class(fw, job_class);
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if (!err)
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err = check_mask(fw);
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if (err)
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goto out;
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break;
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case 1:
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fw->reg = word >> 16 & 0xfff;
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fw->count = word & 0xffff;
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err = check_incr(fw);
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if (err)
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goto out;
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break;
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case 2:
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fw->reg = word >> 16 & 0xfff;
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fw->count = word & 0xffff;
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err = check_nonincr(fw);
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if (err)
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goto out;
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break;
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case 3:
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fw->mask = word & 0xffff;
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fw->reg = word >> 16 & 0xfff;
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err = check_mask(fw);
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if (err)
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goto out;
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break;
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case 4:
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case 14:
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break;
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default:
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err = -EINVAL;
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break;
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}
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}
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out:
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return err;
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}
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static inline int copy_gathers(struct device *host, struct host1x_job *job,
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struct device *dev)
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{
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struct host1x_firewall fw;
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size_t size = 0;
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size_t offset = 0;
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unsigned int i;
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fw.job = job;
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fw.dev = dev;
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fw.reloc = job->relocs;
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fw.num_relocs = job->num_relocs;
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fw.class = job->class;
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for (i = 0; i < job->num_cmds; i++) {
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struct host1x_job_gather *g;
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if (job->cmds[i].is_wait)
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continue;
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g = &job->cmds[i].gather;
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size += g->words * sizeof(u32);
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}
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/*
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* Try a non-blocking allocation from a higher priority pools first,
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* as awaiting for the allocation here is a major performance hit.
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*/
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job->gather_copy_mapped = dma_alloc_wc(host, size, &job->gather_copy,
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GFP_NOWAIT);
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/* the higher priority allocation failed, try the generic-blocking */
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if (!job->gather_copy_mapped)
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job->gather_copy_mapped = dma_alloc_wc(host, size,
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&job->gather_copy,
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GFP_KERNEL);
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if (!job->gather_copy_mapped)
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return -ENOMEM;
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job->gather_copy_size = size;
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|
|
|
for (i = 0; i < job->num_cmds; i++) {
|
|
struct host1x_job_gather *g;
|
|
void *gather;
|
|
|
|
if (job->cmds[i].is_wait)
|
|
continue;
|
|
g = &job->cmds[i].gather;
|
|
|
|
/* Copy the gather */
|
|
gather = host1x_bo_mmap(g->bo);
|
|
memcpy(job->gather_copy_mapped + offset, gather + g->offset,
|
|
g->words * sizeof(u32));
|
|
host1x_bo_munmap(g->bo, gather);
|
|
|
|
/* Store the location in the buffer */
|
|
g->base = job->gather_copy;
|
|
g->offset = offset;
|
|
|
|
/* Validate the job */
|
|
if (validate(&fw, g))
|
|
return -EINVAL;
|
|
|
|
offset += g->words * sizeof(u32);
|
|
}
|
|
|
|
/* No relocs should remain at this point */
|
|
if (fw.num_relocs)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int host1x_job_pin(struct host1x_job *job, struct device *dev)
|
|
{
|
|
int err;
|
|
unsigned int i, j;
|
|
struct host1x *host = dev_get_drvdata(dev->parent);
|
|
|
|
/* pin memory */
|
|
err = pin_job(host, job);
|
|
if (err)
|
|
goto out;
|
|
|
|
if (job->enable_firewall) {
|
|
err = copy_gathers(host->dev, job, dev);
|
|
if (err)
|
|
goto out;
|
|
}
|
|
|
|
/* patch gathers */
|
|
for (i = 0; i < job->num_cmds; i++) {
|
|
struct host1x_job_gather *g;
|
|
|
|
if (job->cmds[i].is_wait)
|
|
continue;
|
|
g = &job->cmds[i].gather;
|
|
|
|
/* process each gather mem only once */
|
|
if (g->handled)
|
|
continue;
|
|
|
|
/* copy_gathers() sets gathers base if firewall is enabled */
|
|
if (!job->enable_firewall)
|
|
g->base = job->gather_addr_phys[i];
|
|
|
|
for (j = i + 1; j < job->num_cmds; j++) {
|
|
if (!job->cmds[j].is_wait &&
|
|
job->cmds[j].gather.bo == g->bo) {
|
|
job->cmds[j].gather.handled = true;
|
|
job->cmds[j].gather.base = g->base;
|
|
}
|
|
}
|
|
|
|
err = do_relocs(job, g);
|
|
if (err)
|
|
break;
|
|
}
|
|
|
|
out:
|
|
if (err)
|
|
host1x_job_unpin(job);
|
|
wmb();
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(host1x_job_pin);
|
|
|
|
void host1x_job_unpin(struct host1x_job *job)
|
|
{
|
|
struct host1x *host = dev_get_drvdata(job->channel->dev->parent);
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < job->num_unpins; i++) {
|
|
struct host1x_bo_mapping *map = job->unpins[i].map;
|
|
struct host1x_bo *bo = map->bo;
|
|
|
|
if (!job->enable_firewall && map->size && host->domain) {
|
|
iommu_unmap(host->domain, job->addr_phys[i], map->size);
|
|
free_iova(&host->iova, iova_pfn(&host->iova, job->addr_phys[i]));
|
|
}
|
|
|
|
host1x_bo_unpin(map);
|
|
host1x_bo_put(bo);
|
|
}
|
|
|
|
job->num_unpins = 0;
|
|
|
|
if (job->gather_copy_size)
|
|
dma_free_wc(host->dev, job->gather_copy_size,
|
|
job->gather_copy_mapped, job->gather_copy);
|
|
}
|
|
EXPORT_SYMBOL(host1x_job_unpin);
|
|
|
|
/*
|
|
* Debug routine used to dump job entries
|
|
*/
|
|
void host1x_job_dump(struct device *dev, struct host1x_job *job)
|
|
{
|
|
dev_dbg(dev, " SYNCPT_ID %d\n", job->syncpt->id);
|
|
dev_dbg(dev, " SYNCPT_VAL %d\n", job->syncpt_end);
|
|
dev_dbg(dev, " FIRST_GET 0x%x\n", job->first_get);
|
|
dev_dbg(dev, " TIMEOUT %d\n", job->timeout);
|
|
dev_dbg(dev, " NUM_SLOTS %d\n", job->num_slots);
|
|
dev_dbg(dev, " NUM_HANDLES %d\n", job->num_unpins);
|
|
}
|