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@@ -0,0 +1,339 @@
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+/*
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+ * drivers/video/tegra/host/gr2d/gr2d.c
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+ *
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+ * Tegra Graphics 2D
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+ *
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+ * Copyright (c) 2012-2013, 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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+
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+#include <linux/export.h>
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+#include <linux/of.h>
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+#include <linux/of_device.h>
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+#include <linux/clk.h>
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+
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+#include "channel.h"
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+#include "drm.h"
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+#include "gem.h"
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+#include "job.h"
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+#include "host1x.h"
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+#include "host1x_bo.h"
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+#include "host1x_client.h"
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+#include "syncpt.h"
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+
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+struct gr2d {
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+ struct host1x_client client;
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+ struct clk *clk;
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+ struct host1x_channel *channel;
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+ unsigned long *addr_regs;
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+};
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+
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+static inline struct gr2d *to_gr2d(struct host1x_client *client)
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+{
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+ return container_of(client, struct gr2d, client);
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+}
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+
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+static int gr2d_is_addr_reg(struct device *dev, u32 class, u32 reg);
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+
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+static int gr2d_client_init(struct host1x_client *client,
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+ struct drm_device *drm)
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+{
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+ return 0;
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+}
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+
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+static int gr2d_client_exit(struct host1x_client *client)
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+{
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+ return 0;
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+}
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+
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+static int gr2d_open_channel(struct host1x_client *client,
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+ struct host1x_drm_context *context)
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+{
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+ struct gr2d *gr2d = to_gr2d(client);
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+
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+ context->channel = host1x_channel_get(gr2d->channel);
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+
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+ if (!context->channel)
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+ return -ENOMEM;
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+
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+ return 0;
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+}
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+
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+static void gr2d_close_channel(struct host1x_drm_context *context)
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+{
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+ host1x_channel_put(context->channel);
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+}
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+
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+static struct host1x_bo *host1x_bo_lookup(struct drm_device *drm,
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+ struct drm_file *file,
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+ u32 handle)
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+{
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+ struct drm_gem_object *gem;
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+ struct tegra_bo *bo;
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+
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+ gem = drm_gem_object_lookup(drm, file, handle);
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+ if (!gem)
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+ return 0;
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+
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+ mutex_lock(&drm->struct_mutex);
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+ drm_gem_object_unreference(gem);
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+ mutex_unlock(&drm->struct_mutex);
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+
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+ bo = to_tegra_bo(gem);
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+ return &bo->base;
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+}
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+
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+static int gr2d_submit(struct host1x_drm_context *context,
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+ struct drm_tegra_submit *args, struct drm_device *drm,
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+ struct drm_file *file)
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+{
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+ struct host1x_job *job;
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+ unsigned int num_cmdbufs = args->num_cmdbufs;
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+ unsigned int num_relocs = args->num_relocs;
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+ unsigned int num_waitchks = args->num_waitchks;
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+ struct drm_tegra_cmdbuf __user *cmdbufs =
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+ (void * __user)(uintptr_t)args->cmdbufs;
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+ struct drm_tegra_reloc __user *relocs =
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+ (void * __user)(uintptr_t)args->relocs;
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+ struct drm_tegra_waitchk __user *waitchks =
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+ (void * __user)(uintptr_t)args->waitchks;
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+ struct drm_tegra_syncpt syncpt;
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+ int err;
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+
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+ /* We don't yet support other than one syncpt_incr struct per submit */
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+ if (args->num_syncpts != 1)
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+ return -EINVAL;
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+
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+ job = host1x_job_alloc(context->channel, args->num_cmdbufs,
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+ args->num_relocs, args->num_waitchks);
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+ if (!job)
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+ return -ENOMEM;
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+
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+ job->num_relocs = args->num_relocs;
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+ job->num_waitchk = args->num_waitchks;
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+ job->client = (u32)args->context;
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+ job->class = context->client->class;
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+ job->serialize = true;
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+
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+ while (num_cmdbufs) {
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+ struct drm_tegra_cmdbuf cmdbuf;
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+ struct host1x_bo *bo;
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+
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+ err = copy_from_user(&cmdbuf, cmdbufs, sizeof(cmdbuf));
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+ if (err)
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+ goto fail;
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+
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+ bo = host1x_bo_lookup(drm, file, cmdbuf.handle);
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+ if (!bo)
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+ goto fail;
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+
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+ host1x_job_add_gather(job, bo, cmdbuf.words, cmdbuf.offset);
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+ num_cmdbufs--;
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+ cmdbufs++;
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+ }
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+
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+ err = copy_from_user(job->relocarray, relocs,
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+ sizeof(*relocs) * num_relocs);
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+ if (err)
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+ goto fail;
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+
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+ while (num_relocs--) {
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+ struct host1x_reloc *reloc = &job->relocarray[num_relocs];
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+ struct host1x_bo *cmdbuf, *target;
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+
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+ cmdbuf = host1x_bo_lookup(drm, file, (u32)reloc->cmdbuf);
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+ target = host1x_bo_lookup(drm, file, (u32)reloc->target);
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+
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+ reloc->cmdbuf = cmdbuf;
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+ reloc->target = target;
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+
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+ if (!reloc->target || !reloc->cmdbuf)
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+ goto fail;
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+ }
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+
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+ err = copy_from_user(job->waitchk, waitchks,
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+ sizeof(*waitchks) * num_waitchks);
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+ if (err)
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+ goto fail;
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+
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+ err = copy_from_user(&syncpt, (void * __user)(uintptr_t)args->syncpts,
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+ sizeof(syncpt));
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+ if (err)
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+ goto fail;
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+
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+ job->syncpt_id = syncpt.id;
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+ job->syncpt_incrs = syncpt.incrs;
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+ job->timeout = 10000;
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+ job->is_addr_reg = gr2d_is_addr_reg;
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+
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+ if (args->timeout && args->timeout < 10000)
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+ job->timeout = args->timeout;
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+
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+ err = host1x_job_pin(job, context->client->dev);
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+ if (err)
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+ goto fail;
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+
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+ err = host1x_job_submit(job);
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+ if (err)
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+ goto fail_submit;
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+
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+ args->fence = job->syncpt_end;
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+
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+ host1x_job_put(job);
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+ return 0;
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+
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+fail_submit:
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+ host1x_job_unpin(job);
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+fail:
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+ host1x_job_put(job);
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+ return err;
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+}
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+
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+static struct host1x_client_ops gr2d_client_ops = {
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+ .drm_init = gr2d_client_init,
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+ .drm_exit = gr2d_client_exit,
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+ .open_channel = gr2d_open_channel,
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+ .close_channel = gr2d_close_channel,
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+ .submit = gr2d_submit,
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+};
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+
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+static void gr2d_init_addr_reg_map(struct device *dev, struct gr2d *gr2d)
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+{
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+ const u32 gr2d_addr_regs[] = {0x1a, 0x1b, 0x26, 0x2b, 0x2c, 0x2d, 0x31,
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+ 0x32, 0x48, 0x49, 0x4a, 0x4b, 0x4c};
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+ unsigned long *bitmap;
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+ int i;
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+
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+ bitmap = devm_kzalloc(dev, DIV_ROUND_UP(256, BITS_PER_BYTE),
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+ GFP_KERNEL);
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+
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+ for (i = 0; i < ARRAY_SIZE(gr2d_addr_regs); ++i) {
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+ u32 reg = gr2d_addr_regs[i];
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+ bitmap[BIT_WORD(reg)] |= BIT_MASK(reg);
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+ }
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+
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+ gr2d->addr_regs = bitmap;
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+}
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+
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+static int gr2d_is_addr_reg(struct device *dev, u32 class, u32 reg)
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+{
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+ struct gr2d *gr2d = dev_get_drvdata(dev);
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+
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+ switch (class) {
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+ case HOST1X_CLASS_HOST1X:
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+ return reg == 0x2b;
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+ case HOST1X_CLASS_GR2D:
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+ case HOST1X_CLASS_GR2D_SB:
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+ reg &= 0xff;
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+ if (gr2d->addr_regs[BIT_WORD(reg)] & BIT_MASK(reg))
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+ return 1;
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+ default:
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+ return 0;
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+ }
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+}
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+
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+static const struct of_device_id gr2d_match[] = {
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+ { .compatible = "nvidia,tegra30-gr2d" },
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+ { .compatible = "nvidia,tegra20-gr2d" },
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+ { },
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+};
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+
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+static int gr2d_probe(struct platform_device *pdev)
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+{
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+ struct device *dev = &pdev->dev;
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+ struct host1x_drm *host1x = host1x_get_drm_data(dev->parent);
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+ int err;
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+ struct gr2d *gr2d = NULL;
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+ struct host1x_syncpt **syncpts;
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+
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+ gr2d = devm_kzalloc(dev, sizeof(*gr2d), GFP_KERNEL);
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+ if (!gr2d)
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+ return -ENOMEM;
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+
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+ syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
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+ if (!syncpts)
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+ return -ENOMEM;
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+
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+ gr2d->clk = devm_clk_get(dev, NULL);
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+ if (IS_ERR(gr2d->clk)) {
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+ dev_err(dev, "cannot get clock\n");
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+ return PTR_ERR(gr2d->clk);
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+ }
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+
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+ err = clk_prepare_enable(gr2d->clk);
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+ if (err) {
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+ dev_err(dev, "cannot turn on clock\n");
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+ return err;
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+ }
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+
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+ gr2d->channel = host1x_channel_request(dev);
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+ if (!gr2d->channel)
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+ return -ENOMEM;
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+
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+ *syncpts = host1x_syncpt_request(dev, 0);
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+ if (!(*syncpts)) {
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+ host1x_channel_free(gr2d->channel);
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+ return -ENOMEM;
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+ }
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+
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+ gr2d->client.ops = &gr2d_client_ops;
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+ gr2d->client.dev = dev;
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+ gr2d->client.class = HOST1X_CLASS_GR2D;
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+ gr2d->client.syncpts = syncpts;
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+ gr2d->client.num_syncpts = 1;
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+
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+ err = host1x_register_client(host1x, &gr2d->client);
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+ if (err < 0) {
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+ dev_err(dev, "failed to register host1x client: %d\n", err);
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+ return err;
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+ }
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+
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+ gr2d_init_addr_reg_map(dev, gr2d);
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+
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+ platform_set_drvdata(pdev, gr2d);
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+
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+ return 0;
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+}
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+
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+static int __exit gr2d_remove(struct platform_device *pdev)
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+{
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+ struct host1x_drm *host1x = host1x_get_drm_data(pdev->dev.parent);
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+ struct gr2d *gr2d = platform_get_drvdata(pdev);
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+ unsigned int i;
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+ int err;
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+
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+ err = host1x_unregister_client(host1x, &gr2d->client);
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+ if (err < 0) {
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+ dev_err(&pdev->dev, "failed to unregister client: %d\n", err);
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+ return err;
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+ }
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+
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+ for (i = 0; i < gr2d->client.num_syncpts; i++)
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+ host1x_syncpt_free(gr2d->client.syncpts[i]);
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+
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+ host1x_channel_free(gr2d->channel);
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+ clk_disable_unprepare(gr2d->clk);
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+
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+ return 0;
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+}
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+
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+struct platform_driver tegra_gr2d_driver = {
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+ .probe = gr2d_probe,
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+ .remove = __exit_p(gr2d_remove),
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+ .driver = {
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+ .owner = THIS_MODULE,
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+ .name = "gr2d",
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+ .of_match_table = gr2d_match,
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+ }
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+};
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Terje Bergstrom