[resend patch 2.6.10-rc3 3/3] agpgart: allow multiple backends to be initialized

[Mike Werner <werner@sgi.com>]

This patch adds support for initializing and addressing multiple AGP
bridges using the agpgart driver. In particular, it extends agp_acquire
and agp_allocate_memory so that different bridges can be acquired
and memory allocated within a specific AGP aperature.

Signed-off-by: Mike Werner <werner@sgi.com>

# This is a BitKeeper generated diff -Nru style patch.
#
# Add fb support for new multiple agp bridge agpgart api
#
diff -Nru a/drivers/video/aty/radeon_pm.c b/drivers/video/aty/radeon_pm.c
--- a/drivers/video/aty/radeon_pm.c	2004-12-17 12:53:56 -08:00
+++ b/drivers/video/aty/radeon_pm.c	2004-12-17 12:53:56 -08:00
@@ -870,7 +870,8 @@
 	 * not for a module.
 	 */
 #ifdef CONFIG_AGP
-	agp_enable(0);
+	/* The bridge can be determined from agp_backend_acquire */
+	agp_enable(agp_bridge, 0);
 #endif
 
 	fb_set_suspend(info, 1);
diff -Nru a/drivers/video/i810/i810_main.c b/drivers/video/i810/i810_main.c
--- a/drivers/video/i810/i810_main.c	2004-12-17 12:53:56 -08:00
+++ b/drivers/video/i810/i810_main.c	2004-12-17 12:53:56 -08:00
@@ -1591,40 +1591,41 @@
 {
 	struct i810fb_par *par = (struct i810fb_par *) info->par;
 	int size;
+	struct agp_bridge_data *bridge;
 	
 	i810_fix_offsets(par);
 	size = par->fb.size + par->iring.size;
 
-	if (agp_backend_acquire()) {
+	if (!(bridge = agp_backend_acquire(par->dev))) {
 		printk("i810fb_alloc_fbmem: cannot acquire agpgart\n");
 		return -ENODEV;
 	}
 	if (!(par->i810_gtt.i810_fb_memory = 
-	      agp_allocate_memory(size >> 12, AGP_NORMAL_MEMORY))) {
+	      agp_allocate_memory(bridge, size >> 12, AGP_NORMAL_MEMORY))) {
 		printk("i810fb_alloc_fbmem: can't allocate framebuffer "
 		       "memory\n");
-		agp_backend_release();
+		agp_backend_release(bridge);
 		return -ENOMEM;
 	}
 	if (agp_bind_memory(par->i810_gtt.i810_fb_memory,
 			    par->fb.offset)) {
 		printk("i810fb_alloc_fbmem: can't bind framebuffer memory\n");
-		agp_backend_release();
+		agp_backend_release(bridge);
 		return -EBUSY;
 	}	
 	
 	if (!(par->i810_gtt.i810_cursor_memory = 
-	      agp_allocate_memory(par->cursor_heap.size >> 12,
+	      agp_allocate_memory(bridge, par->cursor_heap.size >> 12,
 				  AGP_PHYSICAL_MEMORY))) {
 		printk("i810fb_alloc_cursormem:  can't allocate" 
 		       "cursor memory\n");
-		agp_backend_release();
+		agp_backend_release(bridge);
 		return -ENOMEM;
 	}
 	if (agp_bind_memory(par->i810_gtt.i810_cursor_memory,
 			    par->cursor_heap.offset)) {
 		printk("i810fb_alloc_cursormem: cannot bind cursor memory\n");
-		agp_backend_release();
+		agp_backend_release(bridge);
 		return -EBUSY;
 	}	
 
@@ -1632,7 +1633,7 @@
 
 	i810_fix_pointers(par);
 
-	agp_backend_release();
+	agp_backend_release(bridge);
 
 	return 0;
 }
diff -Nru a/drivers/video/intelfb/intelfbdrv.c b/drivers/video/intelfb/intelfbdrv.c
--- a/drivers/video/intelfb/intelfbdrv.c	2004-12-17 12:53:56 -08:00
+++ b/drivers/video/intelfb/intelfbdrv.c	2004-12-17 12:53:56 -08:00
@@ -470,6 +470,7 @@
 	struct agp_kern_info gtt_info;
 	int agp_memtype;
 	const char *s;
+	struct agp_bridge_data *bridge;
 
 	DBG_MSG("intelfb_pci_register\n");
 
@@ -605,16 +606,16 @@
 	}
 
 	/* Use agpgart to manage the GATT */
-	if (agp_backend_acquire()) {
+	if (!(bridge = agp_backend_acquire(pdev))) {
 		ERR_MSG("cannot acquire agp\n");
 		cleanup(dinfo);
 		return -ENODEV;
 	}
 
 	/* get the current gatt info */
-	if (agp_copy_info(&gtt_info)) {
+	if (agp_copy_info(bridge, &gtt_info)) {
 		ERR_MSG("cannot get agp info\n");
-		agp_backend_release();
+		agp_backend_release(bridge);
 		cleanup(dinfo);
 		return -ENODEV;
 	}
@@ -637,17 +638,17 @@
 	/* Allocate memories (which aren't stolen) */
 	if (dinfo->accel) {
 		if (!(dinfo->gtt_ring_mem =
-		      agp_allocate_memory(dinfo->ring.size >> 12,
+		      agp_allocate_memory(bridge, dinfo->ring.size >> 12,
 					  AGP_NORMAL_MEMORY))) {
 			ERR_MSG("cannot allocate ring buffer memory\n");
-			agp_backend_release();
+			agp_backend_release(bridge);
 			cleanup(dinfo);
 			return -ENOMEM;
 		}
 		if (agp_bind_memory(dinfo->gtt_ring_mem,
 				    dinfo->ring.offset)) {
 			ERR_MSG("cannot bind ring buffer memory\n");
-			agp_backend_release();
+			agp_backend_release(bridge);
 			cleanup(dinfo);
 			return -EBUSY;
 		}
@@ -661,17 +662,17 @@
 		agp_memtype = dinfo->mobile ? AGP_PHYSICAL_MEMORY
 			: AGP_NORMAL_MEMORY;
 		if (!(dinfo->gtt_cursor_mem =
-		      agp_allocate_memory(dinfo->cursor.size >> 12,
+		      agp_allocate_memory(bridge, dinfo->cursor.size >> 12,
 					  agp_memtype))) {
 			ERR_MSG("cannot allocate cursor memory\n");
-			agp_backend_release();
+			agp_backend_release(bridge);
 			cleanup(dinfo);
 			return -ENOMEM;
 		}
 		if (agp_bind_memory(dinfo->gtt_cursor_mem,
 				    dinfo->cursor.offset)) {
 			ERR_MSG("cannot bind cursor memory\n");
-			agp_backend_release();
+			agp_backend_release(bridge);
 			cleanup(dinfo);
 			return -EBUSY;
 		}
@@ -686,7 +687,7 @@
 	}
 	if (dinfo->fbmem_gart) {
 		if (!(dinfo->gtt_fb_mem =
-		      agp_allocate_memory(dinfo->fb.size >> 12,
+		      agp_allocate_memory(bridge, dinfo->fb.size >> 12,
 					  AGP_NORMAL_MEMORY))) {
 			WRN_MSG("cannot allocate framebuffer memory - use "
 				"the stolen one\n");
@@ -709,7 +710,7 @@
 	dinfo->fb_start = dinfo->fb.offset << 12;
 
 	/* release agpgart */
-	agp_backend_release();
+	agp_backend_release(bridge);
 
 	if (mtrr)
 		set_mtrr(dinfo);