Add support for allocating PCI GART table in framebuffer memory. This is

    needed to support PCIE Radeons using a new DRM.

5 files changed, 58 insertions, 4 deletions

diff --git a/src/radeon.h b/src/radeon.h
index 814db80..b1060cd 100644
--- a/src/radeon.h
+++ b/src/radeon.h
@@ -543,6 +543,9 @@ typedef struct {
     CARD32            backPitchOffset;
     CARD32            depthPitchOffset;
 
+    int               pciGartSize;
+    CARD32            pciGartOffset;
+
 				/* offscreen memory management */
     int               backLines;
     FBAreaPtr         backArea;
@@ -709,6 +712,7 @@ extern Bool        RADEONDRIScreenInit(ScreenPtr pScreen);
 extern void        RADEONDRICloseScreen(ScreenPtr pScreen);
 extern void        RADEONDRIResume(ScreenPtr pScreen);
 extern Bool        RADEONDRIFinishScreenInit(ScreenPtr pScreen);
+extern void        RADEONDRIAllocatePCIGARTTable(ScreenPtr pScreen);
 
 extern drmBufPtr   RADEONCPGetBuffer(ScrnInfoPtr pScrn);
 extern void        RADEONCPFlushIndirect(ScrnInfoPtr pScrn, int discard);
diff --git a/src/radeon_common.h b/src/radeon_common.h
index d64c136..a6d99c8 100644
--- a/src/radeon_common.h
+++ b/src/radeon_common.h
@@ -473,6 +473,7 @@ typedef struct drm_radeon_set_param {
 
 #define RADEON_SETPARAM_FB_LOCATION     1
 #define RADEON_SETPARAM_SWITCH_TILING   2
+#define RADEON_SETPARAM_PCIGART_LOCATION 3
 
 /* 1.14: Clients can allocate/free a surface
  */
@@ -486,5 +487,4 @@ typedef struct drm_radeon_surface_free {
 	unsigned int address;
 } drmRadeonSurfaceFree;
 
-
 #endif
diff --git a/src/radeon_dri.c b/src/radeon_dri.c
index d302f3e..8e2fe44 100644
--- a/src/radeon_dri.c
+++ b/src/radeon_dri.c
@@ -1969,3 +1969,33 @@ static void RADEONDRITransitionTo2d(ScreenPtr pScreen)
     if (info->cursor_start)
 	    xf86ForceHWCursor (pScreen, FALSE);
 }
+
+void RADEONDRIAllocatePCIGARTTable(ScreenPtr pScreen)
+{
+    ScrnInfoPtr        pScrn   = xf86Screens[pScreen->myNum];
+    RADEONInfoPtr      info    = RADEONPTR(pScrn);
+    FBAreaPtr fbarea;
+    int width;
+    int height;
+    int width_bytes;
+    int size_bytes;
+
+    if (!info->IsPCI || info->drmMinor<19)
+      return;
+
+    size_bytes = RADEON_PCIGART_TABLE_SIZE;
+    width = pScrn->displayWidth;
+    width_bytes = width * (pScrn->bitsPerPixel / 8);
+    height = (size_bytes + width_bytes - 1)/width_bytes;
+    
+    fbarea = xf86AllocateOffscreenArea(pScreen, width, height, 256, NULL, NULL, NULL);
+
+    if (!fbarea) {
+      xf86DrvMsg(pScrn->scrnIndex, X_WARNING, "PCI GART Table allocation failed due to stupid memory manager\n");
+    } else {
+      info->pciGartSize = size_bytes;
+      info->pciGartOffset = RADEON_ALIGN((fbarea->box.x1 + fbarea->box.y1 * width) *
+					 info->CurrentLayout.pixel_bytes, 256);
+      
+    }
+}
diff --git a/src/radeon_dri.h b/src/radeon_dri.h
index 9a90ec8..c93bc4e 100644
--- a/src/radeon_dri.h
+++ b/src/radeon_dri.h
@@ -54,6 +54,8 @@
 
 #define RADEON_DEFAULT_CP_TIMEOUT     10000  /* usecs */
 
+#define RADEON_PCIGART_TABLE_SIZE     32768
+
 #define RADEON_AGP_MAX_MODE           8
 
 #define RADEON_CARD_TYPE_RADEON       1
diff --git a/src/radeon_driver.c b/src/radeon_driver.c
index eb3b7a8..b49b962 100644
--- a/src/radeon_driver.c
+++ b/src/radeon_driver.c
@@ -5299,10 +5299,10 @@ _X_EXPORT Bool RADEONScreenInit(int scrnIndex, ScreenPtr pScreen,
 	    info->textureSize = info->FbMapSize - 3 * bufferSize - depthSize;
 	}
 	/* If there's still no space for textures, try without pixmap cache, but never use
-	   the reserved space and the space hw cursor might use */
+	   the reserved space, the space hw cursor and PCIGART table might use */
 	if (info->textureSize < 0) {
 	    info->textureSize = info->FbMapSize - 2 * bufferSize - depthSize
-				- 2 * width_bytes - 16384;
+				- 2 * width_bytes - 16384 - RADEON_PCIGART_TABLE_SIZE;
 	}
 
 	/* Check to see if there is more room available after the 8192nd
@@ -5420,6 +5420,9 @@ _X_EXPORT Bool RADEONScreenInit(int scrnIndex, ScreenPtr pScreen,
 	    } else {
 		xf86DrvMsg(scrnIndex, X_ERROR, "Unable to reserve area\n");
 	    }
+
+	    RADEONDRIAllocatePCIGARTTable(pScreen);
+
 	    if (xf86QueryLargestOffscreenArea(pScreen, &width,
 					      &height, 0, 0, 0)) {
 		xf86DrvMsg(scrnIndex, X_INFO,
@@ -5450,6 +5453,9 @@ _X_EXPORT Bool RADEONScreenInit(int scrnIndex, ScreenPtr pScreen,
 		   "Will use depth buffer at offset 0x%x\n",
 		   info->depthOffset);
 	xf86DrvMsg(scrnIndex, X_INFO,
+		   "Will use %d kb for PCI GART table at offset 0x%x\n",
+		   info->pciGartSize/1024, info->pciGartOffset);
+	xf86DrvMsg(scrnIndex, X_INFO,
 		   "Will use %d kb for textures at offset 0x%x\n",
 		   info->textureSize/1024, info->textureOffset);
 
@@ -5610,7 +5616,19 @@ _X_EXPORT Bool RADEONScreenInit(int scrnIndex, ScreenPtr pScreen,
 	xf86ShowUnusedOptions(pScrn->scrnIndex, pScrn->options);
 
 #ifdef XF86DRI
-				/* DRI finalization */
+    if (info->IsPCI && info->pciGartOffset && info->drmMinor>=19)
+    {
+      drmRadeonSetParam  radeonsetparam;
+      memset(&radeonsetparam, 0, sizeof(drmRadeonSetParam));
+      radeonsetparam.param = RADEON_SETPARAM_PCIGART_LOCATION;
+      radeonsetparam.value = info->pciGartOffset;
+      if (drmCommandWrite(info->drmFD, DRM_RADEON_SETPARAM,
+			  &radeonsetparam, sizeof(drmRadeonSetParam)) < 0)
+	xf86DrvMsg(pScrn->scrnIndex, X_ERROR,
+		   "[drm] failed set pci gart location\n");
+    }
+
+      /* DRI finalization */
     if (info->directRenderingEnabled) {
 				/* Now that mi, fb, drm and others have
 				   done their thing, complete the DRI