From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- drivers/gpu/host1x/job.c | 598 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 598 insertions(+) create mode 100644 drivers/gpu/host1x/job.c (limited to 'drivers/gpu/host1x/job.c') diff --git a/drivers/gpu/host1x/job.c b/drivers/gpu/host1x/job.c new file mode 100644 index 000000000..63bd63f3c --- /dev/null +++ b/drivers/gpu/host1x/job.c @@ -0,0 +1,598 @@ +/* + * Tegra host1x Job + * + * Copyright (c) 2010-2013, NVIDIA Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "channel.h" +#include "dev.h" +#include "job.h" +#include "syncpt.h" + +struct host1x_job *host1x_job_alloc(struct host1x_channel *ch, + u32 num_cmdbufs, u32 num_relocs, + u32 num_waitchks) +{ + struct host1x_job *job = NULL; + unsigned int num_unpins = num_cmdbufs + num_relocs; + u64 total; + void *mem; + + /* Check that we're not going to overflow */ + total = sizeof(struct host1x_job) + + (u64)num_relocs * sizeof(struct host1x_reloc) + + (u64)num_unpins * sizeof(struct host1x_job_unpin_data) + + (u64)num_waitchks * sizeof(struct host1x_waitchk) + + (u64)num_cmdbufs * sizeof(struct host1x_job_gather) + + (u64)num_unpins * sizeof(dma_addr_t) + + (u64)num_unpins * sizeof(u32 *); + if (total > ULONG_MAX) + return NULL; + + mem = job = kzalloc(total, GFP_KERNEL); + if (!job) + return NULL; + + kref_init(&job->ref); + job->channel = ch; + + /* Redistribute memory to the structs */ + mem += sizeof(struct host1x_job); + job->relocarray = num_relocs ? mem : NULL; + mem += num_relocs * sizeof(struct host1x_reloc); + job->unpins = num_unpins ? mem : NULL; + mem += num_unpins * sizeof(struct host1x_job_unpin_data); + job->waitchk = num_waitchks ? mem : NULL; + mem += num_waitchks * sizeof(struct host1x_waitchk); + job->gathers = num_cmdbufs ? mem : NULL; + mem += num_cmdbufs * sizeof(struct host1x_job_gather); + job->addr_phys = num_unpins ? mem : NULL; + + job->reloc_addr_phys = job->addr_phys; + job->gather_addr_phys = &job->addr_phys[num_relocs]; + + return job; +} +EXPORT_SYMBOL(host1x_job_alloc); + +struct host1x_job *host1x_job_get(struct host1x_job *job) +{ + kref_get(&job->ref); + return job; +} +EXPORT_SYMBOL(host1x_job_get); + +static void job_free(struct kref *ref) +{ + struct host1x_job *job = container_of(ref, struct host1x_job, ref); + + kfree(job); +} + +void host1x_job_put(struct host1x_job *job) +{ + kref_put(&job->ref, job_free); +} +EXPORT_SYMBOL(host1x_job_put); + +void host1x_job_add_gather(struct host1x_job *job, struct host1x_bo *bo, + u32 words, u32 offset) +{ + struct host1x_job_gather *cur_gather = &job->gathers[job->num_gathers]; + + cur_gather->words = words; + cur_gather->bo = bo; + cur_gather->offset = offset; + job->num_gathers++; +} +EXPORT_SYMBOL(host1x_job_add_gather); + +/* + * NULL an already satisfied WAIT_SYNCPT host method, by patching its + * args in the command stream. The method data is changed to reference + * a reserved (never given out or incr) HOST1X_SYNCPT_RESERVED syncpt + * with a matching threshold value of 0, so is guaranteed to be popped + * by the host HW. + */ +static void host1x_syncpt_patch_offset(struct host1x_syncpt *sp, + struct host1x_bo *h, u32 offset) +{ + void *patch_addr = NULL; + + /* patch the wait */ + patch_addr = host1x_bo_kmap(h, offset >> PAGE_SHIFT); + if (patch_addr) { + host1x_syncpt_patch_wait(sp, + patch_addr + (offset & ~PAGE_MASK)); + host1x_bo_kunmap(h, offset >> PAGE_SHIFT, patch_addr); + } else + pr_err("Could not map cmdbuf for wait check\n"); +} + +/* + * Check driver supplied waitchk structs for syncpt thresholds + * that have already been satisfied and NULL the comparison (to + * avoid a wrap condition in the HW). + */ +static int do_waitchks(struct host1x_job *job, struct host1x *host, + struct host1x_bo *patch) +{ + int i; + + /* compare syncpt vs wait threshold */ + for (i = 0; i < job->num_waitchk; i++) { + struct host1x_waitchk *wait = &job->waitchk[i]; + struct host1x_syncpt *sp = + host1x_syncpt_get(host, wait->syncpt_id); + + /* validate syncpt id */ + if (wait->syncpt_id > host1x_syncpt_nb_pts(host)) + continue; + + /* skip all other gathers */ + if (patch != wait->bo) + continue; + + trace_host1x_syncpt_wait_check(wait->bo, wait->offset, + wait->syncpt_id, wait->thresh, + host1x_syncpt_read_min(sp)); + + if (host1x_syncpt_is_expired(sp, wait->thresh)) { + dev_dbg(host->dev, + "drop WAIT id %d (%s) thresh 0x%x, min 0x%x\n", + wait->syncpt_id, sp->name, wait->thresh, + host1x_syncpt_read_min(sp)); + + host1x_syncpt_patch_offset(sp, patch, wait->offset); + } + + wait->bo = NULL; + } + + return 0; +} + +static unsigned int pin_job(struct host1x_job *job) +{ + unsigned int i; + + job->num_unpins = 0; + + for (i = 0; i < job->num_relocs; i++) { + struct host1x_reloc *reloc = &job->relocarray[i]; + struct sg_table *sgt; + dma_addr_t phys_addr; + + reloc->target.bo = host1x_bo_get(reloc->target.bo); + if (!reloc->target.bo) + goto unpin; + + phys_addr = host1x_bo_pin(reloc->target.bo, &sgt); + if (!phys_addr) + goto unpin; + + job->addr_phys[job->num_unpins] = phys_addr; + job->unpins[job->num_unpins].bo = reloc->target.bo; + job->unpins[job->num_unpins].sgt = sgt; + job->num_unpins++; + } + + for (i = 0; i < job->num_gathers; i++) { + struct host1x_job_gather *g = &job->gathers[i]; + struct sg_table *sgt; + dma_addr_t phys_addr; + + g->bo = host1x_bo_get(g->bo); + if (!g->bo) + goto unpin; + + phys_addr = host1x_bo_pin(g->bo, &sgt); + if (!phys_addr) + goto unpin; + + job->addr_phys[job->num_unpins] = phys_addr; + job->unpins[job->num_unpins].bo = g->bo; + job->unpins[job->num_unpins].sgt = sgt; + job->num_unpins++; + } + + return job->num_unpins; + +unpin: + host1x_job_unpin(job); + return 0; +} + +static unsigned int do_relocs(struct host1x_job *job, struct host1x_bo *cmdbuf) +{ + int i = 0; + u32 last_page = ~0; + void *cmdbuf_page_addr = NULL; + + /* pin & patch the relocs for one gather */ + for (i = 0; i < job->num_relocs; i++) { + struct host1x_reloc *reloc = &job->relocarray[i]; + u32 reloc_addr = (job->reloc_addr_phys[i] + + reloc->target.offset) >> reloc->shift; + u32 *target; + + /* skip all other gathers */ + if (cmdbuf != reloc->cmdbuf.bo) + continue; + + if (last_page != reloc->cmdbuf.offset >> PAGE_SHIFT) { + if (cmdbuf_page_addr) + host1x_bo_kunmap(cmdbuf, last_page, + cmdbuf_page_addr); + + cmdbuf_page_addr = host1x_bo_kmap(cmdbuf, + reloc->cmdbuf.offset >> PAGE_SHIFT); + last_page = reloc->cmdbuf.offset >> PAGE_SHIFT; + + if (unlikely(!cmdbuf_page_addr)) { + pr_err("Could not map cmdbuf for relocation\n"); + return -ENOMEM; + } + } + + target = cmdbuf_page_addr + (reloc->cmdbuf.offset & ~PAGE_MASK); + *target = reloc_addr; + } + + if (cmdbuf_page_addr) + host1x_bo_kunmap(cmdbuf, last_page, cmdbuf_page_addr); + + return 0; +} + +static bool check_reloc(struct host1x_reloc *reloc, struct host1x_bo *cmdbuf, + unsigned int offset) +{ + offset *= sizeof(u32); + + if (reloc->cmdbuf.bo != cmdbuf || reloc->cmdbuf.offset != offset) + return false; + + return true; +} + +struct host1x_firewall { + struct host1x_job *job; + struct device *dev; + + unsigned int num_relocs; + struct host1x_reloc *reloc; + + struct host1x_bo *cmdbuf; + unsigned int offset; + + u32 words; + u32 class; + u32 reg; + u32 mask; + u32 count; +}; + +static int check_register(struct host1x_firewall *fw, unsigned long offset) +{ + if (fw->job->is_addr_reg(fw->dev, fw->class, offset)) { + if (!fw->num_relocs) + return -EINVAL; + + if (!check_reloc(fw->reloc, fw->cmdbuf, fw->offset)) + return -EINVAL; + + fw->num_relocs--; + fw->reloc++; + } + + return 0; +} + +static int check_mask(struct host1x_firewall *fw) +{ + u32 mask = fw->mask; + u32 reg = fw->reg; + int ret; + + while (mask) { + if (fw->words == 0) + return -EINVAL; + + if (mask & 1) { + ret = check_register(fw, reg); + if (ret < 0) + return ret; + + fw->words--; + fw->offset++; + } + mask >>= 1; + reg++; + } + + return 0; +} + +static int check_incr(struct host1x_firewall *fw) +{ + u32 count = fw->count; + u32 reg = fw->reg; + int ret; + + while (count) { + if (fw->words == 0) + return -EINVAL; + + ret = check_register(fw, reg); + if (ret < 0) + return ret; + + reg++; + fw->words--; + fw->offset++; + count--; + } + + return 0; +} + +static int check_nonincr(struct host1x_firewall *fw) +{ + u32 count = fw->count; + int ret; + + while (count) { + if (fw->words == 0) + return -EINVAL; + + ret = check_register(fw, fw->reg); + if (ret < 0) + return ret; + + fw->words--; + fw->offset++; + count--; + } + + return 0; +} + +static int validate(struct host1x_firewall *fw, struct host1x_job_gather *g) +{ + u32 *cmdbuf_base = (u32 *)fw->job->gather_copy_mapped + + (g->offset / sizeof(u32)); + int err = 0; + + if (!fw->job->is_addr_reg) + return 0; + + fw->words = g->words; + fw->cmdbuf = g->bo; + fw->offset = 0; + + while (fw->words && !err) { + u32 word = cmdbuf_base[fw->offset]; + u32 opcode = (word & 0xf0000000) >> 28; + + fw->mask = 0; + fw->reg = 0; + fw->count = 0; + fw->words--; + fw->offset++; + + switch (opcode) { + case 0: + fw->class = word >> 6 & 0x3ff; + fw->mask = word & 0x3f; + fw->reg = word >> 16 & 0xfff; + err = check_mask(fw); + if (err) + goto out; + break; + case 1: + fw->reg = word >> 16 & 0xfff; + fw->count = word & 0xffff; + err = check_incr(fw); + if (err) + goto out; + break; + + case 2: + fw->reg = word >> 16 & 0xfff; + fw->count = word & 0xffff; + err = check_nonincr(fw); + if (err) + goto out; + break; + + case 3: + fw->mask = word & 0xffff; + fw->reg = word >> 16 & 0xfff; + err = check_mask(fw); + if (err) + goto out; + break; + case 4: + case 5: + case 14: + break; + default: + err = -EINVAL; + break; + } + } + +out: + return err; +} + +static inline int copy_gathers(struct host1x_job *job, struct device *dev) +{ + struct host1x_firewall fw; + size_t size = 0; + size_t offset = 0; + int i; + + fw.job = job; + fw.dev = dev; + fw.reloc = job->relocarray; + fw.num_relocs = job->num_relocs; + fw.class = 0; + + for (i = 0; i < job->num_gathers; i++) { + struct host1x_job_gather *g = &job->gathers[i]; + size += g->words * sizeof(u32); + } + + job->gather_copy_mapped = dma_alloc_writecombine(dev, size, + &job->gather_copy, + GFP_KERNEL); + if (!job->gather_copy_mapped) { + job->gather_copy_mapped = NULL; + return -ENOMEM; + } + + job->gather_copy_size = size; + + for (i = 0; i < job->num_gathers; i++) { + struct host1x_job_gather *g = &job->gathers[i]; + void *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); + DECLARE_BITMAP(waitchk_mask, host1x_syncpt_nb_pts(host)); + + bitmap_zero(waitchk_mask, host1x_syncpt_nb_pts(host)); + for (i = 0; i < job->num_waitchk; i++) { + u32 syncpt_id = job->waitchk[i].syncpt_id; + if (syncpt_id < host1x_syncpt_nb_pts(host)) + set_bit(syncpt_id, waitchk_mask); + } + + /* get current syncpt values for waitchk */ + for_each_set_bit(i, waitchk_mask, host1x_syncpt_nb_pts(host)) + host1x_syncpt_load(host->syncpt + i); + + /* pin memory */ + err = pin_job(job); + if (!err) + goto out; + + /* patch gathers */ + for (i = 0; i < job->num_gathers; i++) { + struct host1x_job_gather *g = &job->gathers[i]; + + /* process each gather mem only once */ + if (g->handled) + continue; + + 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); +} -- cgit v1.2.3-54-g00ecf