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, 227 insertions, 0 deletions

diff --git a/freedreno/freedreno_pipe.c b/freedreno/freedreno_pipe.c
new file mode 100644
index 00000000..49949ecc
--- /dev/null
+++ b/freedreno/freedreno_pipe.c
@@ -0,0 +1,227 @@
+/* -*- 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>
+ */
+
+#include "freedreno_drmif.h"
+#include "freedreno_priv.h"
+
+
+static int getprop(int fd, enum kgsl_property_type type,
+		void *value, int sizebytes)
+{
+	struct kgsl_device_getproperty req = {
+			.type = type,
+			.value = value,
+			.sizebytes = sizebytes,
+	};
+	return ioctl(fd, IOCTL_KGSL_DEVICE_GETPROPERTY, &req);
+}
+
+#define GETPROP(fd, prop, x) do { \
+	if (getprop((fd), KGSL_PROP_##prop, &(x), sizeof(x))) {     \
+		ERROR_MSG("failed to get property: " #prop);            \
+		goto fail;                                              \
+	} } while (0)
+
+
+struct fd_pipe * fd_pipe_new(struct fd_device *dev, enum fd_pipe_id id)
+{
+	static const char *paths[] = {
+			[FD_PIPE_3D] = "/dev/kgsl-3d0",
+			[FD_PIPE_2D] = "/dev/kgsl-2d0",
+	};
+	struct kgsl_drawctxt_create req = {
+			.flags = 0x2000, /* ??? */
+	};
+	struct fd_pipe *pipe = NULL;
+	int ret, fd;
+
+	if (id > FD_PIPE_MAX) {
+		ERROR_MSG("invalid pipe id: %d", id);
+		goto fail;
+	}
+
+	fd = open(paths[id], O_RDWR);
+	if (fd < 0) {
+		ERROR_MSG("could not open %s device: %d (%s)",
+				paths[id], fd, strerror(errno));
+		goto fail;
+	}
+
+	ret = ioctl(fd, IOCTL_KGSL_DRAWCTXT_CREATE, &req);
+	if (ret) {
+		ERROR_MSG("failed to allocate context: %d (%s)",
+				ret, strerror(errno));
+		goto fail;
+	}
+
+	pipe = calloc(1, sizeof(*pipe));
+	if (!pipe) {
+		ERROR_MSG("allocation failed");
+		goto fail;
+	}
+
+	pipe->dev = dev;
+	pipe->id = id;
+	pipe->fd = fd;
+	pipe->drawctxt_id = req.drawctxt_id;
+
+	list_inithead(&pipe->submit_list);
+	list_inithead(&pipe->pending_list);
+
+	GETPROP(fd, VERSION,     pipe->version);
+	GETPROP(fd, DEVICE_INFO, pipe->devinfo);
+
+	INFO_MSG("Pipe Info:");
+	INFO_MSG(" Device:          %s", paths[id]);
+	INFO_MSG(" Chip-id:         %d.%d.%d.%d",
+			(pipe->devinfo.chip_id >> 24) & 0xff,
+			(pipe->devinfo.chip_id >> 16) & 0xff,
+			(pipe->devinfo.chip_id >>  8) & 0xff,
+			(pipe->devinfo.chip_id >>  0) & 0xff);
+	INFO_MSG(" Device-id:       %d", pipe->devinfo.device_id);
+	INFO_MSG(" GPU-id:          %d", pipe->devinfo.gpu_id);
+	INFO_MSG(" MMU enabled:     %d", pipe->devinfo.mmu_enabled);
+	INFO_MSG(" GMEM Base addr:  0x%08x", pipe->devinfo.gmem_gpubaseaddr);
+	INFO_MSG(" GMEM size:       0x%08x", pipe->devinfo.gmem_sizebytes);
+	INFO_MSG(" Driver version:  %d.%d",
+			pipe->version.drv_major, pipe->version.drv_minor);
+	INFO_MSG(" Device version:  %d.%d",
+			pipe->version.dev_major, pipe->version.dev_minor);
+
+	return pipe;
+fail:
+	if (pipe)
+		fd_pipe_del(pipe);
+	return NULL;
+}
+
+void fd_pipe_del(struct fd_pipe *pipe)
+{
+	struct kgsl_drawctxt_destroy req = {
+			.drawctxt_id = pipe->drawctxt_id,
+	};
+
+	if (pipe->drawctxt_id)
+		ioctl(pipe->fd, IOCTL_KGSL_DRAWCTXT_DESTROY, &req);
+
+	if (pipe->fd)
+		close(pipe->fd);
+
+	free(pipe);
+}
+
+int fd_pipe_get_param(struct fd_pipe *pipe, enum fd_param_id param,
+		uint64_t *value)
+{
+	switch (param) {
+	case FD_DEVICE_ID:
+		*value = pipe->devinfo.device_id;
+		return 0;
+	case FD_GMEM_SIZE:
+		*value = pipe->devinfo.gmem_sizebytes;
+		return 0;
+	default:
+		ERROR_MSG("invalid param id: %d", param);
+		return -1;
+	}
+}
+
+int fd_pipe_wait(struct fd_pipe *pipe, uint32_t timestamp)
+{
+	struct kgsl_device_waittimestamp req = {
+			.timestamp = timestamp,
+			.timeout   = 5000,
+	};
+	int ret;
+
+	do {
+		ret = ioctl(pipe->fd, IOCTL_KGSL_DEVICE_WAITTIMESTAMP, &req);
+	} while ((ret == -1) && ((errno == EINTR) || (errno == EAGAIN)));
+	if (ret)
+		ERROR_MSG("waittimestamp failed! %d (%s)", ret, strerror(errno));
+	else
+		fd_pipe_process_pending(pipe, timestamp);
+	return ret;
+}
+
+int fd_pipe_timestamp(struct fd_pipe *pipe, uint32_t *timestamp)
+{
+	struct kgsl_cmdstream_readtimestamp req = {
+			.type = KGSL_TIMESTAMP_RETIRED
+	};
+	int ret = ioctl(pipe->fd, IOCTL_KGSL_CMDSTREAM_READTIMESTAMP, &req);
+	if (ret) {
+		ERROR_MSG("readtimestamp failed! %d (%s)",
+				ret, strerror(errno));
+		return ret;
+	}
+	*timestamp = req.timestamp;
+	return 0;
+}
+
+/* add buffer to submit list when it is referenced in cmdstream: */
+void fd_pipe_add_submit(struct fd_pipe *pipe, struct fd_bo *bo)
+{
+	struct list_head *list = &bo->list[pipe->id];
+	if (LIST_IS_EMPTY(list)) {
+		fd_bo_ref(bo);
+	} else {
+		list_del(list);
+	}
+	list_addtail(list, &pipe->submit_list);
+}
+
+/* process buffers on submit list after flush: */
+void fd_pipe_process_submit(struct fd_pipe *pipe, uint32_t timestamp)
+{
+	struct fd_bo *bo, *tmp;
+
+	LIST_FOR_EACH_ENTRY_SAFE(bo, tmp, &pipe->submit_list, list[pipe->id]) {
+		struct list_head *list = &bo->list[pipe->id];
+		list_del(list);
+		bo->timestamp[pipe->id] = timestamp;
+		list_addtail(list, &pipe->pending_list);
+	}
+
+	if (!fd_pipe_timestamp(pipe, &timestamp))
+		fd_pipe_process_pending(pipe, timestamp);
+}
+
+void fd_pipe_process_pending(struct fd_pipe *pipe, uint32_t timestamp)
+{
+	struct fd_bo *bo, *tmp;
+
+	LIST_FOR_EACH_ENTRY_SAFE(bo, tmp, &pipe->pending_list, list[pipe->id]) {
+		struct list_head *list = &bo->list[pipe->id];
+		if (bo->timestamp[pipe->id] > timestamp)
+			return;
+		list_delinit(list);
+		bo->timestamp[pipe->id] = 0;
+		fd_bo_del(bo);
+	}
+}