From mboxrd@z Thu Jan 1 00:00:00 1970 From: Martyn Welch Subject: Radeon drivers on PowerPC (e500) Date: Tue, 17 Jun 2014 20:14:00 +0100 Message-ID: <53A09378.6060101@ge.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: Received: from mx0a-00176a03.pphosted.com (mx0a-00176a03.pphosted.com [67.231.149.52]) by gabe.freedesktop.org (Postfix) with ESMTP id 5C8076E4F7 for ; Tue, 17 Jun 2014 13:38:23 -0700 (PDT) Received: from pps.filterd (m0047963.ppops.net [127.0.0.1]) by m0047963.ppops.net-00176a03. (8.14.7/8.14.7) with SMTP id s5HJAQoo024944 for ; Tue, 17 Jun 2014 15:14:17 -0400 Received: from cinmlip12.e2k.ad.ge.com (n165-156-000-000.static.ge.com [165.156.4.1] (may be forged)) by m0047963.ppops.net-00176a03. with ESMTP id 1mjtyp85x8-1 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for ; Tue, 17 Jun 2014 15:14:17 -0400 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: David Airlie , Alex Deucher , =?ISO-8859-1?Q?Christian_K=F6nig?= Cc: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org Hi, I've been asked to try and get a r600 based (E6460) graphics card running on a machine powered by a Freescale p4080 (e500 core). I've run into a bit of a problem. I have the driver built into the kernel at this point. When I boot the card is detected and it seems to be finding the fimware (I'm also building in the required firmware blobs), but I get the following messages: [drm] Initialized drm 1.1.0 20060810 [drm] radeon defaulting to kernel modesetting. [drm] radeon kernel modesetting enabled. [drm] initializing kernel modesetting (CAICOS 0x1002:0x6763 0x1775:0xC6A7). [drm] register mmio base: 0x10000000 [drm] register mmio size: 131072 ATOM BIOS: GE [drm] GPU not posted. posting now... radeon 0000:04:00.0: VRAM: 512M 0x0000000000000000 - 0x000000001FFFFFFF (512M used) radeon 0000:04:00.0: GTT: 512M 0x0000000020000000 - 0x000000003FFFFFFF [drm] Detected VRAM RAM=512M, BAR=256M [drm] RAM width 64bits DDR [TTM] Zone kernel: Available graphics memory: 338754 kiB [TTM] Zone highmem: Available graphics memory: 994110 kiB [TTM] Initializing pool allocator [TTM] Initializing DMA pool allocator [drm] radeon: 512M of VRAM memory ready [drm] radeon: 512M of GTT memory ready. [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). [drm] Driver supports precise vblank timestamp query. radeon 0000:04:00.0: radeon: using MSI. [drm] radeon: irq initialized. [drm] GART: num cpu pages 131072, num gpu pages 131072 [drm] probing gen 2 caps for device 111d:808a = 2/0 [drm] enabling PCIE gen 2 link speeds, disable with radeon.pcie_gen2=0 [drm] Loading CAICOS Microcode __ioremap_caller(140000, 4096, 4194304, c02eab20)__ioremap(): phys addr 0x140000 is RAM lr ttm_bo_kmap radeon 0000:04:00.0: disabling GPU acceleration radeon 0000:04:00.0: e957e400 unpin not necessary radeon 0000:04:00.0: e957e400 unpin not necessary [drm] Radeon Display Connectors [drm] Connector 0: [drm] DP-1 [drm] HPD2 [drm] HPD3 [drm] DDC: 0x6450 0x6450 0x6454 0x6454 0x6458 0x6458 0x645c 0x645c [drm] Encoders: [drm] DFP2: INTERNAL_UNIPHY1 [drm] Connector 2: [drm] DVI-I-1 [drm] HPD1 [drm] DDC: 0x6430 0x6430 0x6434 0x6434 0x6438 0x6438 0x643c 0x643c [drm] Encoders: [drm] DFP3: INTERNAL_UNIPHY [drm] CRT1: INTERNAL_KLDSCP_DAC1 [drm] Internal thermal controller with fan control [drm] radeon: power management initialized __ioremap_caller(141000, 5242880, 4194304, c02eab20)__ioremap(): phys addr 0x141000 is RAM lr ttm_bo_kmap [drm:radeonfb_create] *ERROR* failed to create fbcon object -12 [drm] Initialized radeon 2.29.0 20080528 for 0000:04:00.0 on minor 0 There are failed attempts to ioremap RAM, initially as part of r600_vram_scratch_init() and again I guess mapping the GART? On the e500, overlapping TLBs are not allowed and there is an explict check in arch/powerpc/mm/pgtable_32.c __ioremap_caller() to protect against ioremapping RAM that's already got TLB entries which is resulting in the error messages. I'm out of ideas, any pointers or suggestions on how I might get this working? Has this ever been attempted before? Martyn -- Martyn Welch (Lead Software Engineer) | Registered in England and Wales GE Intelligent Platforms | (3828642) at 100 Barbirolli Square T +44(0)1327322748 | Manchester, M2 3AB E martyn.welch@ge.com | VAT:GB 927559189