Mesa (master): nv30: avoid doing extra work on clear and hitting unexpected states

[Ilia Mirkin]

Module: Mesa
Branch: master
Commit: aba3392541f38f82e3ebde251fdcca78e90adbf3
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=aba3392541f38f82e3ebde251fdcca78e90adbf3

Author: Ilia Mirkin <imirkin at alum.mit.edu>
Date:   Thu Mar  5 12:10:15 2015 -0500

nv30: avoid doing extra work on clear and hitting unexpected states

Clearing can happen at a time when various state objects are incoherent
and not ready for a draw. Some of the validation functions don't handle
this well, so only flush the framebuffer state. This has the advantage
of also not doing extra work.

This works around some crashes that can happen when clearing.

Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
Reviewed-by: Tobias Klausmann <tobias.johannes.klausmann at mni.thm.de>

---

 src/gallium/drivers/nouveau/nv30/nv30_clear.c          |    2 +-
 src/gallium/drivers/nouveau/nv30/nv30_context.h        |    2 +-
 src/gallium/drivers/nouveau/nv30/nv30_draw.c           |    4 ++--
 src/gallium/drivers/nouveau/nv30/nv30_state_validate.c |   10 ++++++----
 src/gallium/drivers/nouveau/nv30/nv30_vbo.c            |    2 +-
 5 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/src/gallium/drivers/nouveau/nv30/nv30_clear.c b/src/gallium/drivers/nouveau/nv30/nv30_clear.c
index 1ab8929..83fd1fa 100644
--- a/src/gallium/drivers/nouveau/nv30/nv30_clear.c
+++ b/src/gallium/drivers/nouveau/nv30/nv30_clear.c
@@ -58,7 +58,7 @@ nv30_clear(struct pipe_context *pipe, unsigned buffers,
    struct pipe_framebuffer_state *fb = &nv30->framebuffer;
    uint32_t colr = 0, zeta = 0, mode = 0;
 
-   if (!nv30_state_validate(nv30, TRUE))
+   if (!nv30_state_validate(nv30, NV30_NEW_FRAMEBUFFER | NV30_NEW_SCISSOR, TRUE))
       return;
 
    if (buffers & PIPE_CLEAR_COLOR && fb->nr_cbufs) {
diff --git a/src/gallium/drivers/nouveau/nv30/nv30_context.h b/src/gallium/drivers/nouveau/nv30/nv30_context.h
index 7b32aae..592cdbe 100644
--- a/src/gallium/drivers/nouveau/nv30/nv30_context.h
+++ b/src/gallium/drivers/nouveau/nv30/nv30_context.h
@@ -204,7 +204,7 @@ void
 nv30_render_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info);
 
 boolean
-nv30_state_validate(struct nv30_context *nv30, boolean hwtnl);
+nv30_state_validate(struct nv30_context *nv30, uint32_t mask, boolean hwtnl);
 
 void
 nv30_state_release(struct nv30_context *nv30);
diff --git a/src/gallium/drivers/nouveau/nv30/nv30_draw.c b/src/gallium/drivers/nouveau/nv30/nv30_draw.c
index 13aad7a..74f0d66 100644
--- a/src/gallium/drivers/nouveau/nv30/nv30_draw.c
+++ b/src/gallium/drivers/nouveau/nv30/nv30_draw.c
@@ -130,7 +130,7 @@ nv30_render_draw_elements(struct vbuf_render *render,
                        NOUVEAU_BO_LOW | NOUVEAU_BO_RD, 0, 0);
    }
 
-   if (!nv30_state_validate(nv30, FALSE))
+   if (!nv30_state_validate(nv30, ~0, FALSE))
       return;
 
    BEGIN_NV04(push, NV30_3D(VERTEX_BEGIN_END), 1);
@@ -175,7 +175,7 @@ nv30_render_draw_arrays(struct vbuf_render *render, unsigned start, uint nr)
                        NOUVEAU_BO_LOW | NOUVEAU_BO_RD, 0, 0);
    }
 
-   if (!nv30_state_validate(nv30, FALSE))
+   if (!nv30_state_validate(nv30, ~0, FALSE))
       return;
 
    BEGIN_NV04(push, NV30_3D(VERTEX_BEGIN_END), 1);
diff --git a/src/gallium/drivers/nouveau/nv30/nv30_state_validate.c b/src/gallium/drivers/nouveau/nv30/nv30_state_validate.c
index 0f9d19d..86ac4f7 100644
--- a/src/gallium/drivers/nouveau/nv30/nv30_state_validate.c
+++ b/src/gallium/drivers/nouveau/nv30/nv30_state_validate.c
@@ -456,7 +456,7 @@ nv30_state_context_switch(struct nv30_context *nv30)
 }
 
 boolean
-nv30_state_validate(struct nv30_context *nv30, boolean hwtnl)
+nv30_state_validate(struct nv30_context *nv30, uint32_t mask, boolean hwtnl)
 {
    struct nouveau_screen *screen = &nv30->screen->base;
    struct nouveau_pushbuf *push = nv30->base.pushbuf;
@@ -481,14 +481,16 @@ nv30_state_validate(struct nv30_context *nv30, boolean hwtnl)
    else
       validate = swtnl_validate_list;
 
-   if (nv30->dirty) {
+   mask &= nv30->dirty;
+
+   if (mask) {
       while (validate->func) {
-         if (nv30->dirty & validate->mask)
+         if (mask & validate->mask)
             validate->func(nv30);
          validate++;
       }
 
-      nv30->dirty = 0;
+      nv30->dirty &= ~mask;
    }
 
    nouveau_pushbuf_bufctx(push, bctx);
diff --git a/src/gallium/drivers/nouveau/nv30/nv30_vbo.c b/src/gallium/drivers/nouveau/nv30/nv30_vbo.c
index 67ab829..d4e384b 100644
--- a/src/gallium/drivers/nouveau/nv30/nv30_vbo.c
+++ b/src/gallium/drivers/nouveau/nv30/nv30_vbo.c
@@ -564,7 +564,7 @@ nv30_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
    if (nv30->vbo_user && !(nv30->dirty & (NV30_NEW_VERTEX | NV30_NEW_ARRAYS)))
       nv30_update_user_vbufs(nv30);
 
-   nv30_state_validate(nv30, TRUE);
+   nv30_state_validate(nv30, ~0, TRUE);
    if (nv30->draw_flags) {
       nv30_render_vbo(pipe, info);
       return;