--- /dev/null
+/*
+ * Copyright 2009 VMware, Inc.
+ * Copyright 2019 Collabora Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "pipe/p_defines.h"
+#include "util/u_inlines.h"
+#include "pipe/p_context.h"
+#include "util/u_memory.h"
+#include "util/u_math.h"
+
+#include "virgl_staging_mgr.h"
+#include "virgl_resource.h"
+
+static bool
+virgl_staging_alloc_buffer(struct virgl_staging_mgr *staging, unsigned min_size)
+{
+ struct virgl_winsys *vws = staging->vws;
+ unsigned size;
+
+ /* Release the old buffer, if present:
+ */
+ vws->resource_reference(vws, &staging->hw_res, NULL);
+
+ /* Allocate a new one:
+ */
+ size = align(MAX2(staging->default_size, min_size), 4096);
+
+ staging->hw_res = vws->resource_create(vws,
+ PIPE_BUFFER,
+ PIPE_FORMAT_R8_UNORM,
+ VIRGL_BIND_STAGING,
+ size, /* width */
+ 1, /* height */
+ 1, /* depth */
+ 1, /* array_size */
+ 0, /* last_level */
+ 0, /* nr_samples */
+ size); /* size */
+ if (staging->hw_res == NULL)
+ return false;
+
+ staging->map = vws->resource_map(vws, staging->hw_res);
+ if (staging->map == NULL) {
+ vws->resource_reference(vws, &staging->hw_res, NULL);
+ return false;
+ }
+
+ staging->offset = 0;
+ staging->size = size;
+
+ return true;
+}
+
+void
+virgl_staging_init(struct virgl_staging_mgr *staging, struct pipe_context *pipe,
+ unsigned default_size)
+{
+ memset(staging, 0, sizeof(*staging));
+
+ staging->vws = virgl_screen(pipe->screen)->vws;
+ staging->default_size = default_size;
+}
+
+void
+virgl_staging_destroy(struct virgl_staging_mgr *staging)
+{
+ struct virgl_winsys *vws = staging->vws;
+ vws->resource_reference(vws, &staging->hw_res, NULL);
+}
+
+bool
+virgl_staging_alloc(struct virgl_staging_mgr *staging,
+ unsigned size,
+ unsigned alignment,
+ unsigned *out_offset,
+ struct virgl_hw_res **outbuf,
+ void **ptr)
+{
+ struct virgl_winsys *vws = staging->vws;
+ unsigned offset = align(staging->offset, alignment);
+
+ assert(out_offset);
+ assert(outbuf);
+ assert(ptr);
+ assert(size);
+
+ /* Make sure we have enough space in the staging buffer
+ * for the sub-allocation.
+ */
+ if (offset + size > staging->size) {
+ if (unlikely(!virgl_staging_alloc_buffer(staging, size))) {
+ *out_offset = ~0;
+ vws->resource_reference(vws, outbuf, NULL);
+ *ptr = NULL;
+ return false;
+ }
+
+ offset = 0;
+ }
+
+ assert(staging->size);
+ assert(staging->hw_res);
+ assert(staging->map);
+ assert(offset < staging->size);
+ assert(offset + size <= staging->size);
+
+ /* Emit the return values: */
+ *ptr = staging->map + offset;
+ vws->resource_reference(vws, outbuf, staging->hw_res);
+ *out_offset = offset;
+
+ staging->offset = offset + size;
+
+ return true;
+}
--- /dev/null
+/*
+ * Copyright 2009 VMware, Inc.
+ * Copyright 2019 Collabora Ltd.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/* virgl staging buffer manager, heavily inspired by u_upload_mgr. */
+
+#ifndef VIRGL_STAGING_MGR_H
+#define VIRGL_STAGING_MGR_H
+
+struct pipe_context;
+struct virgl_hw_res;
+struct virgl_winsys;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct virgl_staging_mgr {
+ struct virgl_winsys *vws;
+ unsigned default_size; /* Minimum size of the staging buffer, in bytes. */
+ struct virgl_hw_res *hw_res; /* Staging buffer hw_res. */
+ unsigned size; /* Current staging buffer size. */
+ uint8_t *map; /* Pointer to the mapped staging buffer. */
+ unsigned offset; /* Offset pointing at the first unused buffer byte. */
+};
+
+/**
+ * Init the staging manager.
+ *
+ * \param staging Pointer to the staging manager to initialize.
+ * \param pipe Pipe driver.
+ * \param default_size Minimum size of the staging buffer, in bytes.
+ */
+void
+virgl_staging_init(struct virgl_staging_mgr *staging, struct pipe_context *pipe,
+ unsigned default_size);
+
+/**
+ * Destroy the staging manager.
+ */
+void
+virgl_staging_destroy(struct virgl_staging_mgr *staging);
+
+/**
+ * Sub-allocate new memory from the staging buffer.
+ *
+ * The returned pointer to the buffer references the internal staging buffer.
+ *
+ * The returned pointer to staging buffer memory is guaranteed to be valid
+ * for as long as the returned buffer is still referenced.
+ *
+ * \param staging Staging manager
+ * \param size Size of the allocation.
+ * \param alignment Alignment of the suballocation within the buffer.
+ * \param out_offset Pointer to where the new buffer offset will be returned.
+ * \param outbuf Pointer to where the staging buffer will be returned.
+ * \param ptr Pointer to the allocated memory that is returned.
+ * \return Whether the allocation is successful.
+ */
+bool
+virgl_staging_alloc(struct virgl_staging_mgr *staging,
+ unsigned size,
+ unsigned alignment,
+ unsigned *out_offset,
+ struct virgl_hw_res **outbuf,
+ void **ptr);
+
+#ifdef __cplusplus
+} // extern "C" {
+#endif
+
+#endif
projects / mesa.git / commitdiff