drm: Add GEM ("graphics execution manager") to i915 driver.

GEM allows the creation of persistent buffer objects accessible by the
graphics device through new ioctls for managing execution of commands on the
device.  The userland API is almost entirely driver-specific to ensure that
any driver building on this model can easily map the interface to individual
driver requirements.

GEM is used by the 2d driver for managing its internal state allocations and
will be used for pixmap storage to reduce memory consumption and enable
zero-copy GLX_EXT_texture_from_pixmap, and in the 3d driver is used to enable
GL_EXT_framebuffer_object and GL_ARB_pixel_buffer_object.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 292 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem_proc.c b/drivers/gpu/drm/i915/i915_gem_proc.c
new file mode 100644
index 00000000000..15d4160415b
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_gem_proc.c
@@ -0,0 +1,292 @@
+/*
+ * Copyright © 2008 Intel Corporation
+ *
+ * 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:
+ *    Eric Anholt <eric@anholt.net>
+ *    Keith Packard <keithp@keithp.com>
+ *
+ */
+
+#include "drmP.h"
+#include "drm.h"
+#include "i915_drm.h"
+#include "i915_drv.h"
+
+static int i915_gem_active_info(char *buf, char **start, off_t offset,
+                                int request, int *eof, void *data)
+{
+        struct drm_minor *minor = (struct drm_minor *) data;
+        struct drm_device *dev = minor->dev;
+        drm_i915_private_t *dev_priv = dev->dev_private;
+        struct drm_i915_gem_object *obj_priv;
+        int len = 0;
+
+        if (offset > DRM_PROC_LIMIT) {
+                *eof = 1;
+                return 0;
+        }
+
+        *start = &buf[offset];
+        *eof = 0;
+        DRM_PROC_PRINT("Active:\n");
+        list_for_each_entry(obj_priv, &dev_priv->mm.active_list,
+                            list)
+        {
+                struct drm_gem_object *obj = obj_priv->obj;
+                if (obj->name) {
+                        DRM_PROC_PRINT("    %p(%d): %08x %08x %d\n",
+                                       obj, obj->name,
+                                       obj->read_domains, obj->write_domain,
+                                       obj_priv->last_rendering_seqno);
+                } else {
+                        DRM_PROC_PRINT("       %p: %08x %08x %d\n",
+                                       obj,
+                                       obj->read_domains, obj->write_domain,
+                                       obj_priv->last_rendering_seqno);
+                }
+        }
+        if (len > request + offset)
+                return request;
+        *eof = 1;
+        return len - offset;
+}
+
+static int i915_gem_flushing_info(char *buf, char **start, off_t offset,
+                                  int request, int *eof, void *data)
+{
+        struct drm_minor *minor = (struct drm_minor *) data;
+        struct drm_device *dev = minor->dev;
+        drm_i915_private_t *dev_priv = dev->dev_private;
+        struct drm_i915_gem_object *obj_priv;
+        int len = 0;
+
+        if (offset > DRM_PROC_LIMIT) {
+                *eof = 1;
+                return 0;
+        }
+
+        *start = &buf[offset];
+        *eof = 0;
+        DRM_PROC_PRINT("Flushing:\n");
+        list_for_each_entry(obj_priv, &dev_priv->mm.flushing_list,
+                            list)
+        {
+                struct drm_gem_object *obj = obj_priv->obj;
+                if (obj->name) {
+                        DRM_PROC_PRINT("    %p(%d): %08x %08x %d\n",
+                                       obj, obj->name,
+                                       obj->read_domains, obj->write_domain,
+                                       obj_priv->last_rendering_seqno);
+                } else {
+                        DRM_PROC_PRINT("       %p: %08x %08x %d\n", obj,
+                                       obj->read_domains, obj->write_domain,
+                                       obj_priv->last_rendering_seqno);
+                }
+        }
+        if (len > request + offset)
+                return request;
+        *eof = 1;
+        return len - offset;
+}
+
+static int i915_gem_inactive_info(char *buf, char **start, off_t offset,
+                                  int request, int *eof, void *data)
+{
+        struct drm_minor *minor = (struct drm_minor *) data;
+        struct drm_device *dev = minor->dev;
+        drm_i915_private_t *dev_priv = dev->dev_private;
+        struct drm_i915_gem_object *obj_priv;
+        int len = 0;
+
+        if (offset > DRM_PROC_LIMIT) {
+                *eof = 1;
+                return 0;
+        }
+
+        *start = &buf[offset];
+        *eof = 0;
+        DRM_PROC_PRINT("Inactive:\n");
+        list_for_each_entry(obj_priv, &dev_priv->mm.inactive_list,
+                            list)
+        {
+                struct drm_gem_object *obj = obj_priv->obj;
+                if (obj->name) {
+                        DRM_PROC_PRINT("    %p(%d): %08x %08x %d\n",
+                                       obj, obj->name,
+                                       obj->read_domains, obj->write_domain,
+                                       obj_priv->last_rendering_seqno);
+                } else {
+                        DRM_PROC_PRINT("       %p: %08x %08x %d\n", obj,
+                                       obj->read_domains, obj->write_domain,
+                                       obj_priv->last_rendering_seqno);
+                }
+        }
+        if (len > request + offset)
+                return request;
+        *eof = 1;
+        return len - offset;
+}
+
+static int i915_gem_request_info(char *buf, char **start, off_t offset,
+                                 int request, int *eof, void *data)
+{
+        struct drm_minor *minor = (struct drm_minor *) data;
+        struct drm_device *dev = minor->dev;
+        drm_i915_private_t *dev_priv = dev->dev_private;
+        struct drm_i915_gem_request *gem_request;
+        int len = 0;
+
+        if (offset > DRM_PROC_LIMIT) {
+                *eof = 1;
+                return 0;
+        }
+
+        *start = &buf[offset];
+        *eof = 0;
+        DRM_PROC_PRINT("Request:\n");
+        list_for_each_entry(gem_request, &dev_priv->mm.request_list,
+                            list)
+        {
+                DRM_PROC_PRINT("    %d @ %d %08x\n",
+                               gem_request->seqno,
+                               (int) (jiffies - gem_request->emitted_jiffies),
+                               gem_request->flush_domains);
+        }
+        if (len > request + offset)
+                return request;
+        *eof = 1;
+        return len - offset;
+}
+
+static int i915_gem_seqno_info(char *buf, char **start, off_t offset,
+                               int request, int *eof, void *data)
+{
+        struct drm_minor *minor = (struct drm_minor *) data;
+        struct drm_device *dev = minor->dev;
+        drm_i915_private_t *dev_priv = dev->dev_private;
+        int len = 0;
+
+        if (offset > DRM_PROC_LIMIT) {
+                *eof = 1;
+                return 0;
+        }
+
+        *start = &buf[offset];
+        *eof = 0;
+        DRM_PROC_PRINT("Current sequence: %d\n", i915_get_gem_seqno(dev));
+        DRM_PROC_PRINT("Waiter sequence:  %d\n",
+                       dev_priv->mm.waiting_gem_seqno);
+        DRM_PROC_PRINT("IRQ sequence:     %d\n", dev_priv->mm.irq_gem_seqno);
+        if (len > request + offset)
+                return request;
+        *eof = 1;
+        return len - offset;
+}
+
+
+static int i915_interrupt_info(char *buf, char **start, off_t offset,
+                               int request, int *eof, void *data)
+{
+        struct drm_minor *minor = (struct drm_minor *) data;
+        struct drm_device *dev = minor->dev;
+        drm_i915_private_t *dev_priv = dev->dev_private;
+        int len = 0;
+
+        if (offset > DRM_PROC_LIMIT) {
+                *eof = 1;
+                return 0;
+        }
+
+        *start = &buf[offset];
+        *eof = 0;
+        DRM_PROC_PRINT("Interrupt enable:    %08x\n",
+                       I915_READ(IER));
+        DRM_PROC_PRINT("Interrupt identity:  %08x\n",
+                       I915_READ(IIR));
+        DRM_PROC_PRINT("Interrupt mask:      %08x\n",
+                       I915_READ(IMR));
+        DRM_PROC_PRINT("Pipe A stat:         %08x\n",
+                       I915_READ(PIPEASTAT));
+        DRM_PROC_PRINT("Pipe B stat:         %08x\n",
+                       I915_READ(PIPEBSTAT));
+        DRM_PROC_PRINT("Interrupts received: %d\n",
+                       atomic_read(&dev_priv->irq_received));
+        DRM_PROC_PRINT("Current sequence:    %d\n",
+                       i915_get_gem_seqno(dev));
+        DRM_PROC_PRINT("Waiter sequence:     %d\n",
+                       dev_priv->mm.waiting_gem_seqno);
+        DRM_PROC_PRINT("IRQ sequence:        %d\n",
+                       dev_priv->mm.irq_gem_seqno);
+        if (len > request + offset)
+                return request;
+        *eof = 1;
+        return len - offset;
+}
+
+static struct drm_proc_list {
+        /** file name */
+        const char *name;
+        /** proc callback*/
+        int (*f) (char *, char **, off_t, int, int *, void *);
+} i915_gem_proc_list[] = {
+        {"i915_gem_active", i915_gem_active_info},
+        {"i915_gem_flushing", i915_gem_flushing_info},
+        {"i915_gem_inactive", i915_gem_inactive_info},
+        {"i915_gem_request", i915_gem_request_info},
+        {"i915_gem_seqno", i915_gem_seqno_info},
+        {"i915_gem_interrupt", i915_interrupt_info},
+};
+
+#define I915_GEM_PROC_ENTRIES ARRAY_SIZE(i915_gem_proc_list)
+
+int i915_gem_proc_init(struct drm_minor *minor)
+{
+        struct proc_dir_entry *ent;
+        int i, j;
+
+        for (i = 0; i < I915_GEM_PROC_ENTRIES; i++) {
+                ent = create_proc_entry(i915_gem_proc_list[i].name,
+                                        S_IFREG | S_IRUGO, minor->dev_root);
+                if (!ent) {
+                        DRM_ERROR("Cannot create /proc/dri/.../%s\n",
+                                  i915_gem_proc_list[i].name);
+                        for (j = 0; j < i; j++)
+                                remove_proc_entry(i915_gem_proc_list[i].name,
+                                                  minor->dev_root);
+                        return -1;
+                }
+                ent->read_proc = i915_gem_proc_list[i].f;
+                ent->data = minor;
+        }
+        return 0;
+}
+
+void i915_gem_proc_cleanup(struct drm_minor *minor)
+{
+        int i;
+
+        if (!minor->dev_root)
+                return;
+
+        for (i = 0; i < I915_GEM_PROC_ENTRIES; i++)
+                remove_proc_entry(i915_gem_proc_list[i].name, minor->dev_root);
+}