Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 456 insertions, 0 deletions

diff --git a/drivers/video/fbdev/i810/i810_accel.c b/drivers/video/fbdev/i810/i810_accel.c
new file mode 100644
index 000000000..7672d2ea9
--- /dev/null
+++ b/drivers/video/fbdev/i810/i810_accel.c
@@ -0,0 +1,456 @@
+/*-*- linux-c -*-
+ *  linux/drivers/video/i810_accel.c -- Hardware Acceleration
+ *
+ *      Copyright (C) 2001 Antonino Daplas<adaplas@pol.net>
+ *      All Rights Reserved      
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License. See the file COPYING in the main directory of this archive for
+ *  more details.
+ */
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/fb.h>
+
+#include "i810_regs.h"
+#include "i810.h"
+#include "i810_main.h"
+
+static u32 i810fb_rop[] = {
+	COLOR_COPY_ROP, /* ROP_COPY */
+	XOR_ROP         /* ROP_XOR  */
+};
+
+/* Macros */
+#define PUT_RING(n) {                                        \
+	i810_writel(par->cur_tail, par->iring.virtual, n);   \
+        par->cur_tail += 4;                                  \
+        par->cur_tail &= RING_SIZE_MASK;                     \
+}                                                                      
+
+extern void flush_cache(void);
+
+/************************************************************/
+
+/* BLT Engine Routines */
+static inline void i810_report_error(u8 __iomem *mmio)
+{
+	printk("IIR     : 0x%04x\n"
+	       "EIR     : 0x%04x\n"
+	       "PGTBL_ER: 0x%04x\n"
+	       "IPEIR   : 0x%04x\n"
+	       "IPEHR   : 0x%04x\n",
+	       i810_readw(IIR, mmio),
+	       i810_readb(EIR, mmio),
+	       i810_readl(PGTBL_ER, mmio),
+	       i810_readl(IPEIR, mmio), 
+	       i810_readl(IPEHR, mmio));
+}
+
+/**
+ * wait_for_space - check ring buffer free space
+ * @space: amount of ringbuffer space needed in bytes
+ * @par: pointer to i810fb_par structure
+ *
+ * DESCRIPTION:
+ * The function waits until a free space from the ringbuffer
+ * is available 
+ */	
+static inline int wait_for_space(struct fb_info *info, u32 space)
+{
+	struct i810fb_par *par = info->par;
+	u32 head, count = WAIT_COUNT, tail;
+	u8 __iomem *mmio = par->mmio_start_virtual;
+
+	tail = par->cur_tail;
+	while (count--) {
+		head = i810_readl(IRING + 4, mmio) & RBUFFER_HEAD_MASK;	
+		if ((tail == head) || 
+		    (tail > head && 
+		     (par->iring.size - tail + head) >= space) || 
+		    (tail < head && (head - tail) >= space)) {
+			return 0;	
+		}
+	}
+	printk("ringbuffer lockup!!!\n");
+	i810_report_error(mmio); 
+	par->dev_flags |= LOCKUP;
+	info->pixmap.scan_align = 1;
+	return 1;
+}
+
+/** 
+ * wait_for_engine_idle - waits for all hardware engines to finish
+ * @par: pointer to i810fb_par structure
+ *
+ * DESCRIPTION:
+ * This waits for lring(0), iring(1), and batch(3), etc to finish and
+ * waits until ringbuffer is empty.
+ */
+static inline int wait_for_engine_idle(struct fb_info *info)
+{
+	struct i810fb_par *par = info->par;
+	u8 __iomem *mmio = par->mmio_start_virtual;
+	int count = WAIT_COUNT;
+
+	if (wait_for_space(info, par->iring.size)) /* flush */
+		return 1;
+
+	while((i810_readw(INSTDONE, mmio) & 0x7B) != 0x7B && --count); 
+	if (count) return 0;
+
+	printk("accel engine lockup!!!\n");
+	printk("INSTDONE: 0x%04x\n", i810_readl(INSTDONE, mmio));
+	i810_report_error(mmio); 
+	par->dev_flags |= LOCKUP;
+	info->pixmap.scan_align = 1;
+	return 1;
+}
+
+/* begin_iring - prepares the ringbuffer 
+ * @space: length of sequence in dwords
+ * @par: pointer to i810fb_par structure
+ *
+ * DESCRIPTION:
+ * Checks/waits for sufficient space in ringbuffer of size
+ * space.  Returns the tail of the buffer
+ */ 
+static inline u32 begin_iring(struct fb_info *info, u32 space)
+{
+	struct i810fb_par *par = info->par;
+
+	if (par->dev_flags & ALWAYS_SYNC) 
+		wait_for_engine_idle(info);
+	return wait_for_space(info, space);
+}
+
+/**
+ * end_iring - advances the buffer
+ * @par: pointer to i810fb_par structure
+ *
+ * DESCRIPTION:
+ * This advances the tail of the ringbuffer, effectively
+ * beginning the execution of the graphics instruction sequence.
+ */
+static inline void end_iring(struct i810fb_par *par)
+{
+	u8 __iomem *mmio = par->mmio_start_virtual;
+
+	i810_writel(IRING, mmio, par->cur_tail);
+}
+
+/**
+ * source_copy_blit - BLIT transfer operation
+ * @dwidth: width of rectangular graphics data
+ * @dheight: height of rectangular graphics data
+ * @dpitch: bytes per line of destination buffer
+ * @xdir: direction of copy (left to right or right to left)
+ * @src: address of first pixel to read from
+ * @dest: address of first pixel to write to
+ * @from: source address
+ * @where: destination address
+ * @rop: raster operation
+ * @blit_bpp: pixel format which can be different from the 
+ *            framebuffer's pixelformat
+ * @par: pointer to i810fb_par structure
+ *
+ * DESCRIPTION:
+ * This is a BLIT operation typically used when doing
+ * a 'Copy and Paste'
+ */
+static inline void source_copy_blit(int dwidth, int dheight, int dpitch, 
+				    int xdir, int src, int dest, int rop, 
+				    int blit_bpp, struct fb_info *info)
+{
+	struct i810fb_par *par = info->par;
+
+	if (begin_iring(info, 24 + IRING_PAD)) return;
+
+	PUT_RING(BLIT | SOURCE_COPY_BLIT | 4);
+	PUT_RING(xdir | rop << 16 | dpitch | DYN_COLOR_EN | blit_bpp);
+	PUT_RING(dheight << 16 | dwidth);
+	PUT_RING(dest);
+	PUT_RING(dpitch);
+	PUT_RING(src);
+
+	end_iring(par);
+}	
+
+/**
+ * color_blit - solid color BLIT operation
+ * @width: width of destination
+ * @height: height of destination
+ * @pitch: pixels per line of the buffer
+ * @dest: address of first pixel to write to
+ * @where: destination
+ * @rop: raster operation
+ * @what: color to transfer
+ * @blit_bpp: pixel format which can be different from the 
+ *            framebuffer's pixelformat
+ * @par: pointer to i810fb_par structure
+ *
+ * DESCRIPTION:
+ * A BLIT operation which can be used for  color fill/rectangular fill
+ */
+static inline void color_blit(int width, int height, int pitch,  int dest, 
+			      int rop, int what, int blit_bpp, 
+			      struct fb_info *info)
+{
+	struct i810fb_par *par = info->par;
+
+	if (begin_iring(info, 24 + IRING_PAD)) return;
+
+	PUT_RING(BLIT | COLOR_BLT | 3);
+	PUT_RING(rop << 16 | pitch | SOLIDPATTERN | DYN_COLOR_EN | blit_bpp);
+	PUT_RING(height << 16 | width);
+	PUT_RING(dest);
+	PUT_RING(what);
+	PUT_RING(NOP);
+
+	end_iring(par);
+}
+ 
+/**
+ * mono_src_copy_imm_blit - color expand from system memory to framebuffer
+ * @dwidth: width of destination
+ * @dheight: height of destination
+ * @dpitch: pixels per line of the buffer
+ * @dsize: size of bitmap in double words
+ * @dest: address of first byte of pixel;
+ * @rop: raster operation
+ * @blit_bpp: pixelformat to use which can be different from the 
+ *            framebuffer's pixelformat
+ * @src: address of image data
+ * @bg: backgound color
+ * @fg: forground color
+ * @par: pointer to i810fb_par structure
+ *
+ * DESCRIPTION:
+ * A color expand operation where the  source data is placed in the 
+ * ringbuffer itself. Useful for drawing text. 
+ *
+ * REQUIREMENT:
+ * The end of a scanline must be padded to the next word.
+ */
+static inline void mono_src_copy_imm_blit(int dwidth, int dheight, int dpitch,
+					  int dsize, int blit_bpp, int rop,
+					  int dest, const u32 *src, int bg,
+					  int fg, struct fb_info *info)
+{
+	struct i810fb_par *par = info->par;
+
+	if (begin_iring(info, 24 + (dsize << 2) + IRING_PAD)) return;
+
+	PUT_RING(BLIT | MONO_SOURCE_COPY_IMMEDIATE | (4 + dsize));
+	PUT_RING(DYN_COLOR_EN | blit_bpp | rop << 16 | dpitch);
+	PUT_RING(dheight << 16 | dwidth);
+	PUT_RING(dest);
+	PUT_RING(bg);
+	PUT_RING(fg);
+	while (dsize--) 
+		PUT_RING(*src++);
+
+	end_iring(par);
+}
+
+static inline void load_front(int offset, struct fb_info *info)
+{
+	struct i810fb_par *par = info->par;
+
+	if (begin_iring(info, 8 + IRING_PAD)) return;
+
+	PUT_RING(PARSER | FLUSH);
+	PUT_RING(NOP);
+
+	end_iring(par);
+
+	if (begin_iring(info, 8 + IRING_PAD)) return;
+
+	PUT_RING(PARSER | FRONT_BUFFER | ((par->pitch >> 3) << 8));
+	PUT_RING((par->fb.offset << 12) + offset);
+
+	end_iring(par);
+}
+
+/**
+ * i810fb_iring_enable - enables/disables the ringbuffer
+ * @mode: enable or disable
+ * @par: pointer to i810fb_par structure
+ *
+ * DESCRIPTION:
+ * Enables or disables the ringbuffer, effectively enabling or
+ * disabling the instruction/acceleration engine.
+ */
+static inline void i810fb_iring_enable(struct i810fb_par *par, u32 mode)
+{
+	u32 tmp;
+	u8 __iomem *mmio = par->mmio_start_virtual;
+
+	tmp = i810_readl(IRING + 12, mmio);
+	if (mode == OFF) 
+		tmp &= ~1;
+	else 
+		tmp |= 1;
+	flush_cache();
+	i810_writel(IRING + 12, mmio, tmp);
+}       
+
+void i810fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
+{
+	struct i810fb_par *par = info->par;
+	u32 dx, dy, width, height, dest, rop = 0, color = 0;
+
+	if (!info->var.accel_flags || par->dev_flags & LOCKUP ||
+	    par->depth == 4) {
+		cfb_fillrect(info, rect);
+		return;
+	}
+
+	if (par->depth == 1) 
+		color = rect->color;
+	else 
+		color = ((u32 *) (info->pseudo_palette))[rect->color];
+
+	rop = i810fb_rop[rect->rop];
+
+	dx = rect->dx * par->depth;
+	width = rect->width * par->depth;
+	dy = rect->dy;
+	height = rect->height;
+
+	dest = info->fix.smem_start + (dy * info->fix.line_length) + dx;
+	color_blit(width, height, info->fix.line_length, dest, rop, color, 
+		   par->blit_bpp, info);
+}
+	
+void i810fb_copyarea(struct fb_info *info, const struct fb_copyarea *region) 
+{
+	struct i810fb_par *par = info->par;
+	u32 sx, sy, dx, dy, pitch, width, height, src, dest, xdir;
+
+	if (!info->var.accel_flags || par->dev_flags & LOCKUP ||
+	    par->depth == 4) {
+		cfb_copyarea(info, region);
+		return;
+	}
+
+	dx = region->dx * par->depth;
+	sx = region->sx * par->depth;
+	width = region->width * par->depth;
+	sy = region->sy;
+	dy = region->dy;
+	height = region->height;
+
+	if (dx <= sx) {
+		xdir = INCREMENT;
+	}
+	else {
+		xdir = DECREMENT;
+		sx += width - 1;
+		dx += width - 1;
+	}
+	if (dy <= sy) {
+		pitch = info->fix.line_length;
+	}
+	else {
+		pitch = (-(info->fix.line_length)) & 0xFFFF;
+		sy += height - 1;
+		dy += height - 1;
+	}
+	src = info->fix.smem_start + (sy * info->fix.line_length) + sx;
+	dest = info->fix.smem_start + (dy * info->fix.line_length) + dx;
+
+	source_copy_blit(width, height, pitch, xdir, src, dest,
+			 PAT_COPY_ROP, par->blit_bpp, info);
+}
+
+void i810fb_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+	struct i810fb_par *par = info->par;
+	u32 fg = 0, bg = 0, size, dst;
+	
+	if (!info->var.accel_flags || par->dev_flags & LOCKUP ||
+	    par->depth == 4 || image->depth != 1) {
+		cfb_imageblit(info, image);
+		return;
+	}
+
+	switch (info->var.bits_per_pixel) {
+	case 8:
+		fg = image->fg_color;
+		bg = image->bg_color;
+		break;
+	case 16:
+	case 24:
+		fg = ((u32 *)(info->pseudo_palette))[image->fg_color];
+		bg = ((u32 *)(info->pseudo_palette))[image->bg_color];
+		break;
+	}	
+	
+	dst = info->fix.smem_start + (image->dy * info->fix.line_length) + 
+		(image->dx * par->depth);
+
+	size = (image->width+7)/8 + 1;
+	size &= ~1;
+	size *= image->height;
+	size += 7;
+	size &= ~7;
+	mono_src_copy_imm_blit(image->width * par->depth, 
+			       image->height, info->fix.line_length, 
+			       size/4, par->blit_bpp,
+			       PAT_COPY_ROP, dst, (u32 *) image->data, 
+			       bg, fg, info);
+} 
+
+int i810fb_sync(struct fb_info *info)
+{
+	struct i810fb_par *par = info->par;
+	
+	if (!info->var.accel_flags || par->dev_flags & LOCKUP)
+		return 0;
+
+	return wait_for_engine_idle(info);
+}
+
+void i810fb_load_front(u32 offset, struct fb_info *info)
+{
+	struct i810fb_par *par = info->par;
+	u8 __iomem *mmio = par->mmio_start_virtual;
+
+	if (!info->var.accel_flags || par->dev_flags & LOCKUP)
+		i810_writel(DPLYBASE, mmio, par->fb.physical + offset);
+	else 
+		load_front(offset, info);
+}
+
+/**
+ * i810fb_init_ringbuffer - initialize the ringbuffer
+ * @par: pointer to i810fb_par structure
+ *
+ * DESCRIPTION:
+ * Initializes the ringbuffer by telling the device the
+ * size and location of the ringbuffer.  It also sets 
+ * the head and tail pointers = 0
+ */
+void i810fb_init_ringbuffer(struct fb_info *info)
+{
+	struct i810fb_par *par = info->par;
+	u32 tmp1, tmp2;
+	u8 __iomem *mmio = par->mmio_start_virtual;
+	
+	wait_for_engine_idle(info);
+	i810fb_iring_enable(par, OFF);
+	i810_writel(IRING, mmio, 0);
+	i810_writel(IRING + 4, mmio, 0);
+	par->cur_tail = 0;
+
+	tmp2 = i810_readl(IRING + 8, mmio) & ~RBUFFER_START_MASK; 
+	tmp1 = par->iring.physical;
+	i810_writel(IRING + 8, mmio, tmp2 | tmp1);
+
+	tmp1 = i810_readl(IRING + 12, mmio);
+	tmp1 &= ~RBUFFER_SIZE_MASK;
+	tmp2 = (par->iring.size - I810_PAGESIZE) & RBUFFER_SIZE_MASK;
+	i810_writel(IRING + 12, mmio, tmp1 | tmp2);
+	i810fb_iring_enable(par, ON);
+}