599 lines
13 KiB
C
599 lines
13 KiB
C
/*
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* Tegra host1x Job
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*
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* Copyright (c) 2010-2013, NVIDIA Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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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/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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struct host1x_job *host1x_job_alloc(struct host1x_channel *ch,
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u32 num_cmdbufs, u32 num_relocs,
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u32 num_waitchks)
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{
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struct host1x_job *job = NULL;
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unsigned int num_unpins = num_cmdbufs + num_relocs;
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u64 total;
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void *mem;
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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_waitchks * sizeof(struct host1x_waitchk) +
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(u64)num_cmdbufs * sizeof(struct host1x_job_gather) +
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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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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->relocarray = 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->waitchk = num_waitchks ? mem : NULL;
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mem += num_waitchks * sizeof(struct host1x_waitchk);
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job->gathers = num_cmdbufs ? mem : NULL;
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mem += num_cmdbufs * sizeof(struct host1x_job_gather);
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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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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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u32 words, u32 offset)
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{
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struct host1x_job_gather *cur_gather = &job->gathers[job->num_gathers];
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cur_gather->words = words;
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cur_gather->bo = bo;
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cur_gather->offset = offset;
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job->num_gathers++;
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}
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EXPORT_SYMBOL(host1x_job_add_gather);
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/*
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* NULL an already satisfied WAIT_SYNCPT host method, by patching its
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* args in the command stream. The method data is changed to reference
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* a reserved (never given out or incr) HOST1X_SYNCPT_RESERVED syncpt
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* with a matching threshold value of 0, so is guaranteed to be popped
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* by the host HW.
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*/
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static void host1x_syncpt_patch_offset(struct host1x_syncpt *sp,
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struct host1x_bo *h, u32 offset)
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{
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void *patch_addr = NULL;
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/* patch the wait */
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patch_addr = host1x_bo_kmap(h, offset >> PAGE_SHIFT);
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if (patch_addr) {
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host1x_syncpt_patch_wait(sp,
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patch_addr + (offset & ~PAGE_MASK));
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host1x_bo_kunmap(h, offset >> PAGE_SHIFT, patch_addr);
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} else
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pr_err("Could not map cmdbuf for wait check\n");
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}
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/*
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* Check driver supplied waitchk structs for syncpt thresholds
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* that have already been satisfied and NULL the comparison (to
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* avoid a wrap condition in the HW).
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*/
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static int do_waitchks(struct host1x_job *job, struct host1x *host,
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struct host1x_bo *patch)
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{
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int i;
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/* compare syncpt vs wait threshold */
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for (i = 0; i < job->num_waitchk; i++) {
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struct host1x_waitchk *wait = &job->waitchk[i];
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struct host1x_syncpt *sp =
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host1x_syncpt_get(host, wait->syncpt_id);
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/* validate syncpt id */
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if (wait->syncpt_id > host1x_syncpt_nb_pts(host))
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continue;
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/* skip all other gathers */
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if (patch != wait->bo)
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continue;
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trace_host1x_syncpt_wait_check(wait->bo, wait->offset,
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wait->syncpt_id, wait->thresh,
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host1x_syncpt_read_min(sp));
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if (host1x_syncpt_is_expired(sp, wait->thresh)) {
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dev_dbg(host->dev,
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"drop WAIT id %d (%s) thresh 0x%x, min 0x%x\n",
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wait->syncpt_id, sp->name, wait->thresh,
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host1x_syncpt_read_min(sp));
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host1x_syncpt_patch_offset(sp, patch, wait->offset);
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}
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wait->bo = NULL;
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}
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return 0;
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}
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static unsigned int pin_job(struct host1x_job *job)
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{
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unsigned int i;
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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->relocarray[i];
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struct sg_table *sgt;
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dma_addr_t phys_addr;
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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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goto unpin;
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phys_addr = host1x_bo_pin(reloc->target.bo, &sgt);
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if (!phys_addr)
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goto unpin;
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job->addr_phys[job->num_unpins] = phys_addr;
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job->unpins[job->num_unpins].bo = reloc->target.bo;
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job->unpins[job->num_unpins].sgt = sgt;
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job->num_unpins++;
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}
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for (i = 0; i < job->num_gathers; i++) {
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struct host1x_job_gather *g = &job->gathers[i];
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struct sg_table *sgt;
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dma_addr_t phys_addr;
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g->bo = host1x_bo_get(g->bo);
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if (!g->bo)
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goto unpin;
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phys_addr = host1x_bo_pin(g->bo, &sgt);
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if (!phys_addr)
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goto unpin;
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job->addr_phys[job->num_unpins] = phys_addr;
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job->unpins[job->num_unpins].bo = g->bo;
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job->unpins[job->num_unpins].sgt = sgt;
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job->num_unpins++;
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}
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return job->num_unpins;
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unpin:
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host1x_job_unpin(job);
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return 0;
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}
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static unsigned int do_relocs(struct host1x_job *job, struct host1x_bo *cmdbuf)
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{
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int i = 0;
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u32 last_page = ~0;
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void *cmdbuf_page_addr = NULL;
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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->relocarray[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 (last_page != reloc->cmdbuf.offset >> PAGE_SHIFT) {
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if (cmdbuf_page_addr)
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host1x_bo_kunmap(cmdbuf, last_page,
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cmdbuf_page_addr);
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cmdbuf_page_addr = host1x_bo_kmap(cmdbuf,
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reloc->cmdbuf.offset >> PAGE_SHIFT);
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last_page = reloc->cmdbuf.offset >> PAGE_SHIFT;
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if (unlikely(!cmdbuf_page_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_page_addr + (reloc->cmdbuf.offset & ~PAGE_MASK);
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*target = reloc_addr;
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}
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if (cmdbuf_page_addr)
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host1x_bo_kunmap(cmdbuf, last_page, cmdbuf_page_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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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(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_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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int err = 0;
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if (!fw->job->is_addr_reg)
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return 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_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 5:
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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 host1x_job *job, 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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int i;
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fw.job = job;
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fw.dev = dev;
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fw.reloc = job->relocarray;
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fw.num_relocs = job->num_relocs;
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fw.class = 0;
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for (i = 0; i < job->num_gathers; i++) {
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struct host1x_job_gather *g = &job->gathers[i];
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size += g->words * sizeof(u32);
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}
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job->gather_copy_mapped = dma_alloc_writecombine(dev, 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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job->gather_copy_mapped = NULL;
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return -ENOMEM;
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}
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job->gather_copy_size = size;
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for (i = 0; i < job->num_gathers; i++) {
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struct host1x_job_gather *g = &job->gathers[i];
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void *gather;
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/* Copy the gather */
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gather = host1x_bo_mmap(g->bo);
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memcpy(job->gather_copy_mapped + offset, gather + g->offset,
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g->words * sizeof(u32));
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host1x_bo_munmap(g->bo, gather);
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/* Store the location in the buffer */
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g->base = job->gather_copy;
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g->offset = offset;
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/* Validate the job */
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if (validate(&fw, g))
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return -EINVAL;
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offset += g->words * sizeof(u32);
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}
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/* No relocs should remain at this point */
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if (fw.num_relocs)
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return -EINVAL;
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return 0;
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}
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int host1x_job_pin(struct host1x_job *job, struct device *dev)
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{
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int err;
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unsigned int i, j;
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struct host1x *host = dev_get_drvdata(dev->parent);
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DECLARE_BITMAP(waitchk_mask, host1x_syncpt_nb_pts(host));
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bitmap_zero(waitchk_mask, host1x_syncpt_nb_pts(host));
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for (i = 0; i < job->num_waitchk; i++) {
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u32 syncpt_id = job->waitchk[i].syncpt_id;
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if (syncpt_id < host1x_syncpt_nb_pts(host))
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set_bit(syncpt_id, waitchk_mask);
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}
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/* get current syncpt values for waitchk */
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for_each_set_bit(i, waitchk_mask, host1x_syncpt_nb_pts(host))
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host1x_syncpt_load(host->syncpt + i);
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/* pin memory */
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err = pin_job(job);
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if (!err)
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goto out;
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/* patch gathers */
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for (i = 0; i < job->num_gathers; i++) {
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struct host1x_job_gather *g = &job->gathers[i];
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/* process each gather mem only once */
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if (g->handled)
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continue;
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g->base = job->gather_addr_phys[i];
|
|
|
|
for (j = i + 1; j < job->num_gathers; j++)
|
|
if (job->gathers[j].bo == g->bo)
|
|
job->gathers[j].handled = true;
|
|
|
|
err = do_relocs(job, g->bo);
|
|
if (err)
|
|
break;
|
|
|
|
err = do_waitchks(job, host, g->bo);
|
|
if (err)
|
|
break;
|
|
}
|
|
|
|
if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL) && !err) {
|
|
err = copy_gathers(job, dev);
|
|
if (err) {
|
|
host1x_job_unpin(job);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
out:
|
|
wmb();
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(host1x_job_pin);
|
|
|
|
void host1x_job_unpin(struct host1x_job *job)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < job->num_unpins; i++) {
|
|
struct host1x_job_unpin_data *unpin = &job->unpins[i];
|
|
host1x_bo_unpin(unpin->bo, unpin->sgt);
|
|
host1x_bo_put(unpin->bo);
|
|
}
|
|
job->num_unpins = 0;
|
|
|
|
if (job->gather_copy_size)
|
|
dma_free_writecombine(job->channel->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);
|
|
}
|