freedreno: add freedreno DRM

The libdrm_freedreno helper layer for use by xf86-video-freedreno,
fdre (freedreno r/e library and tests for driving gpu), and eventual
gallium driver for the Adreno GPU.  This uses the msm gpu driver
from QCOM's android kernel tree.

Note that current msm kernel driver is a bit strange.  It provides a
DRM interface for GEM, which is basically sufficient to have DRI2
working.  But it does not provide KMS.  And interface to 2d and 3d
cores is via different other devices (/dev/kgsl-*).  This is not
quite how I'd write a DRM driver, but at this stage it is useful for
xf86-video-freedreno and fdre (and eventual gallium driver) to be
able to work on existing kernel driver from QCOM, to allow to
capture cmdstream dumps from the binary blob drivers without having
to reboot.  So libdrm_freedreno attempts to hide most of the crazy.
The intention is that when there is a proper kernel driver, it will
be mostly just changes in libdrm_freedreno to adapt the gallium
driver and xf86-video-freedreno (ignoring the fbdev->KMS changes).

So don't look at freedreno as an example of how to write a libdrm
module or a DRM driver.. it is just an attempt to paper over a non-
standard kernel driver architecture.

v1: original
v2: hold ref's to pending bo's (because qcom's kernel driver doesn't),
    various bug fixes, add ringbuffer markers so we can emit IB's to
    portion of ringbuffer (so that gallium driver can use a single
    ringbuffer for both tile cmds and draw cmds.

Signed-off-by: Rob Clark <robclark@freedesktop.org>

1 files changed, 117 insertions, 0 deletions

diff --git a/freedreno/freedreno_priv.h b/freedreno/freedreno_priv.h
new file mode 100644
index 00000000..aa71b564
--- /dev/null
+++ b/freedreno/freedreno_priv.h
@@ -0,0 +1,117 @@
+/* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
+
+/*
+ * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
+ *
+ * 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
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ *
+ * Authors:
+ *    Rob Clark <robclark@freedesktop.org>
+ */
+
+#ifndef FREEDRENO_PRIV_H_
+#define FREEDRENO_PRIV_H_
+
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+
+#include "xf86drm.h"
+#include "xf86atomic.h"
+
+#include "list.h"
+
+#include "freedreno_drmif.h"
+#include "msm_kgsl.h"
+#include "kgsl_drm.h"
+
+struct fd_device {
+	int fd;
+};
+
+struct fd_pipe {
+	struct fd_device *dev;
+	enum fd_pipe_id id;
+	int fd;
+	uint32_t drawctxt_id;
+
+	/* device properties: */
+	struct kgsl_version version;
+	struct kgsl_devinfo devinfo;
+
+	/* list of bo's that are referenced in ringbuffer but not
+	 * submitted yet:
+	 */
+	struct list_head submit_list;
+
+	/* list of bo's that have been submitted but timestamp has
+	 * not passed yet (so still ref'd in active cmdstream)
+	 */
+	struct list_head pending_list;
+};
+
+void fd_pipe_add_submit(struct fd_pipe *pipe, struct fd_bo *bo);
+void fd_pipe_process_submit(struct fd_pipe *pipe, uint32_t timestamp);
+void fd_pipe_process_pending(struct fd_pipe *pipe, uint32_t timestamp);
+
+struct fd_bo {
+	struct fd_device *dev;
+	uint32_t size;
+	uint32_t handle;
+	uint32_t name;
+	uint32_t gpuaddr;
+	void *map;
+	uint64_t offset;
+	/* timestamp (per pipe) for bo's in a pipe's pending_list: */
+	uint32_t timestamp[FD_PIPE_MAX];
+	/* list-node for pipe's submit_list or pending_list */
+	struct list_head list[FD_PIPE_MAX];
+	atomic_t refcnt;
+};
+
+/* not exposed publicly, because won't be needed when we have
+ * a proper kernel driver
+ */
+uint32_t fd_bo_gpuaddr(struct fd_bo *bo, uint32_t offset);
+
+#define ALIGN(v,a) (((v) + (a) - 1) & ~((a) - 1))
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+#define enable_debug 1  /* TODO make dynamic */
+
+#define INFO_MSG(fmt, ...) \
+		do { drmMsg("[I] "fmt " (%s:%d)\n", \
+				##__VA_ARGS__, __FUNCTION__, __LINE__); } while (0)
+#define DEBUG_MSG(fmt, ...) \
+		do if (enable_debug) { drmMsg("[D] "fmt " (%s:%d)\n", \
+				##__VA_ARGS__, __FUNCTION__, __LINE__); } while (0)
+#define WARN_MSG(fmt, ...) \
+		do { drmMsg("[W] "fmt " (%s:%d)\n", \
+				##__VA_ARGS__, __FUNCTION__, __LINE__); } while (0)
+#define ERROR_MSG(fmt, ...) \
+		do { drmMsg("[E] " fmt " (%s:%d)\n", \
+				##__VA_ARGS__, __FUNCTION__, __LINE__); } while (0)
+
+#endif /* FREEDRENO_PRIV_H_ */