gpu: host1x: Add channel support
Add support for host1x client modules, and host1x channels to submit
work to the clients.
Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de>
Tested-by: Thierry Reding <thierry.reding@avionic-design.de>
Tested-by: Erik Faye-Lund <kusmabite@gmail.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
diff --git a/drivers/gpu/host1x/job.c b/drivers/gpu/host1x/job.c
new file mode 100644
index 0000000..f665d67
--- /dev/null
+++ b/drivers/gpu/host1x/job.c
@@ -0,0 +1,603 @@
+/*
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/err.h>
+#include <linux/kref.h>
+#include <linux/module.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <trace/events/host1x.h>
+
+#include "channel.h"
+#include "dev.h"
+#include "host1x_bo.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) +
+ num_relocs * sizeof(struct host1x_reloc) +
+ num_unpins * sizeof(struct host1x_job_unpin_data) +
+ num_waitchks * sizeof(struct host1x_waitchk) +
+ num_cmdbufs * sizeof(struct host1x_job_gather) +
+ num_unpins * sizeof(dma_addr_t) +
+ 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;
+}
+
+struct host1x_job *host1x_job_get(struct host1x_job *job)
+{
+ kref_get(&job->ref);
+ return job;
+}
+
+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);
+}
+
+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++;
+}
+
+/*
+ * 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 = host1x_bo_get(reloc->target);
+ if (!reloc->target)
+ goto unpin;
+
+ phys_addr = host1x_bo_pin(reloc->target, &sgt);
+ if (!phys_addr)
+ goto unpin;
+
+ job->addr_phys[job->num_unpins] = phys_addr;
+ job->unpins[job->num_unpins].bo = reloc->target;
+ 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 */
+ while (i < job->num_relocs) {
+ 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 (!(reloc->cmdbuf && cmdbuf == reloc->cmdbuf)) {
+ i++;
+ 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;
+
+ /* mark this gather as handled */
+ reloc->cmdbuf = 0;
+ }
+
+ if (cmdbuf_page_addr)
+ host1x_bo_kunmap(cmdbuf, last_page, cmdbuf_page_addr);
+
+ return 0;
+}
+
+static int check_reloc(struct host1x_reloc *reloc, struct host1x_bo *cmdbuf,
+ unsigned int offset)
+{
+ offset *= sizeof(u32);
+
+ if (reloc->cmdbuf != cmdbuf || reloc->cmdbuf_offset != offset)
+ return -EINVAL;
+
+ return 0;
+}
+
+struct host1x_firewall {
+ struct host1x_job *job;
+ struct device *dev;
+
+ unsigned int num_relocs;
+ struct host1x_reloc *reloc;
+
+ struct host1x_bo *cmdbuf_id;
+ unsigned int offset;
+
+ u32 words;
+ u32 class;
+ u32 reg;
+ u32 mask;
+ u32 count;
+};
+
+static int check_mask(struct host1x_firewall *fw)
+{
+ u32 mask = fw->mask;
+ u32 reg = fw->reg;
+
+ while (mask) {
+ if (fw->words == 0)
+ return -EINVAL;
+
+ if (mask & 1) {
+ if (fw->job->is_addr_reg(fw->dev, fw->class, reg)) {
+ bool bad_reloc = check_reloc(fw->reloc,
+ fw->cmdbuf_id,
+ fw->offset);
+ if (!fw->num_relocs || bad_reloc)
+ return -EINVAL;
+ fw->reloc++;
+ fw->num_relocs--;
+ }
+ 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;
+
+ while (fw) {
+ if (fw->words == 0)
+ return -EINVAL;
+
+ if (fw->job->is_addr_reg(fw->dev, fw->class, reg)) {
+ bool bad_reloc = check_reloc(fw->reloc, fw->cmdbuf_id,
+ fw->offset);
+ if (!fw->num_relocs || bad_reloc)
+ return -EINVAL;
+ fw->reloc++;
+ fw->num_relocs--;
+ }
+ reg++;
+ fw->words--;
+ fw->offset++;
+ count--;
+ }
+
+ return 0;
+}
+
+static int check_nonincr(struct host1x_firewall *fw)
+{
+ int is_addr_reg = fw->job->is_addr_reg(fw->dev, fw->class, fw->reg);
+ u32 count = fw->count;
+
+ while (count) {
+ if (fw->words == 0)
+ return -EINVAL;
+
+ if (is_addr_reg) {
+ bool bad_reloc = check_reloc(fw->reloc, fw->cmdbuf_id,
+ fw->offset);
+ if (!fw->num_relocs || bad_reloc)
+ return -EINVAL;
+ fw->reloc++;
+ fw->num_relocs--;
+ }
+ fw->words--;
+ fw->offset++;
+ count--;
+ }
+
+ return 0;
+}
+
+static int validate(struct host1x_job *job, struct device *dev,
+ struct host1x_job_gather *g)
+{
+ u32 *cmdbuf_base;
+ int err = 0;
+ struct host1x_firewall fw;
+
+ fw.job = job;
+ fw.dev = dev;
+ fw.reloc = job->relocarray;
+ fw.num_relocs = job->num_relocs;
+ fw.cmdbuf_id = g->bo;
+
+ fw.offset = 0;
+ fw.class = 0;
+
+ if (!job->is_addr_reg)
+ return 0;
+
+ cmdbuf_base = host1x_bo_mmap(g->bo);
+ if (!cmdbuf_base)
+ return -ENOMEM;
+
+ fw.words = g->words;
+ 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;
+ }
+ }
+
+ /* No relocs should remain at this point */
+ if (fw.num_relocs)
+ err = -EINVAL;
+
+out:
+ host1x_bo_munmap(g->bo, cmdbuf_base);
+
+ return err;
+}
+
+static inline int copy_gathers(struct host1x_job *job, struct device *dev)
+{
+ size_t size = 0;
+ size_t offset = 0;
+ int i;
+
+ 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) {
+ int err = PTR_ERR(job->gather_copy_mapped);
+ job->gather_copy_mapped = NULL;
+ return err;
+ }
+
+ job->gather_copy_size = size;
+
+ for (i = 0; i < job->num_gathers; i++) {
+ struct host1x_job_gather *g = &job->gathers[i];
+ void *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);
+
+ g->base = job->gather_copy;
+ g->offset = offset;
+ g->bo = NULL;
+
+ offset += g->words * sizeof(u32);
+ }
+
+ 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 = 0; j < job->num_gathers; j++)
+ if (job->gathers[j].bo == g->bo)
+ job->gathers[j].handled = true;
+
+ err = 0;
+
+ if (IS_ENABLED(CONFIG_TEGRA_HOST1X_FIREWALL))
+ err = validate(job, dev, g);
+
+ if (err)
+ dev_err(dev, "Job invalid (err=%d)\n", err);
+
+ if (!err)
+ err = do_relocs(job, g->bo);
+
+ if (!err)
+ 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;
+}
+
+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);
+}
+
+/*
+ * 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);
+}