From 77e8ac07c6bcbc944a7c631f91bbaf64ab99634c Mon Sep 17 00:00:00 2001
From: Alexander von Gluck IV <kallisti5@unixzen.com>
Date: Sun, 7 Aug 2011 05:19:42 +0000
Subject: [PATCH] * add allocation of atombios fb scratch * add free of
 allocated fb scratch

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42591 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 .../accelerants/radeon_hd/atombios/atom.cpp   | 30 +++++++++++++++++++
 .../accelerants/radeon_hd/atombios/atom.h     |  2 ++
 src/add-ons/accelerants/radeon_hd/bios.cpp    |  1 +
 3 files changed, 33 insertions(+)

diff --git a/src/add-ons/accelerants/radeon_hd/atombios/atom.cpp b/src/add-ons/accelerants/radeon_hd/atombios/atom.cpp
index 3c06cec576..52d0549383 100644
--- a/src/add-ons/accelerants/radeon_hd/atombios/atom.cpp
+++ b/src/add-ons/accelerants/radeon_hd/atombios/atom.cpp
@@ -1272,6 +1272,7 @@ atom_destroy(atom_context *ctx)
 {
 	if (ctx != NULL) {
 		free(ctx->iio);
+		free(ctx->scratch);
 		delete_sem(ctx->exec_sem);
 	}
 
@@ -1319,3 +1320,32 @@ atom_parse_cmd_header(atom_context *ctx, int index, uint8 * frev,
 	return B_OK;
 }
 
+
+status_t
+atom_allocate_fb_scratch(atom_context *ctx)
+{
+	int index = GetIndexIntoMasterTable(DATA, VRAM_UsageByFirmware);
+	uint16 data_offset;
+	int usage_bytes = 0;
+	_ATOM_VRAM_USAGE_BY_FIRMWARE *firmware;
+
+	if (atom_parse_data_header(ctx, index, NULL, NULL, NULL, &data_offset)) {
+		firmware = (_ATOM_VRAM_USAGE_BY_FIRMWARE *)
+				((uint16*)ctx->bios + data_offset);
+
+		TRACE("Atom firmware requested 0x%" B_PRIX32 " %" B_PRIu16 "kb\n",
+			firmware->asFirmwareVramReserveInfo[0].ulStartAddrUsedByFirmware,
+			firmware->asFirmwareVramReserveInfo[0].usFirmwareUseInKb);
+
+		usage_bytes
+			= firmware->asFirmwareVramReserveInfo[0].usFirmwareUseInKb * 1024;
+	}
+	if (usage_bytes == 0)
+		usage_bytes = 20 * 1024;
+	/* allocate some scratch memory */
+	ctx->scratch = (uint32*)malloc(usage_bytes);
+	if (!ctx->scratch)
+		return B_NO_MEMORY;
+
+	return B_OK;
+}
diff --git a/src/add-ons/accelerants/radeon_hd/atombios/atom.h b/src/add-ons/accelerants/radeon_hd/atombios/atom.h
index 4333528a63..13a1897b81 100644
--- a/src/add-ons/accelerants/radeon_hd/atombios/atom.h
+++ b/src/add-ons/accelerants/radeon_hd/atombios/atom.h
@@ -154,5 +154,7 @@ status_t atom_parse_cmd_header(atom_context *ctx, int index, uint8 * frev,
 	uint8 * crev);
 status_t atom_asic_init(atom_context *);
 void atom_destroy(atom_context *);
+status_t atom_allocate_fb_scratch(atom_context *ctx);
+
 
 #endif
diff --git a/src/add-ons/accelerants/radeon_hd/bios.cpp b/src/add-ons/accelerants/radeon_hd/bios.cpp
index 21568d0d90..d128288fc0 100644
--- a/src/add-ons/accelerants/radeon_hd/bios.cpp
+++ b/src/add-ons/accelerants/radeon_hd/bios.cpp
@@ -111,6 +111,7 @@ radeon_init_bios(uint8* bios)
 		// Post card
 
 	radeon_bios_init_scratch();
+	atom_allocate_fb_scratch(gAtomContext);
 
 	return B_OK;
 }