mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@14940 3c298f89-4303-0410-b956-a3cf2f4a3e73
958 lines
26 KiB
Diff
958 lines
26 KiB
Diff
From d7ddc1aaee1ff6dd6a73bd3663b6c390800e0500 Mon Sep 17 00:00:00 2001
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From: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
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Date: Wed, 25 Feb 2009 18:32:10 +0100
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Subject: [PATCH] ps3/block: Replace mtd/ps3vram by block/ps3vram
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Convert the PS3 Video RAM Storage Driver from a MTD driver to a plain block
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device driver, as requested by Arnd Bergmann.
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The ps3vram driver exposes unused video RAM on the PS3 as a block device
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suitable for storage or swap. Fast data transfer is achieved using a local
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cache in system RAM and DMA transfers via the GPU.
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The new driver is ca. 50% faster for reading, and ca. 10% for writing.
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Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
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Acked-by: Jens Axboe <axboe@kernel.dk>
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Acked-by: Geoff Levand <geoffrey.levand@am.sony.com>
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Cc: Arnd Bergmann <arnd@arndb.de>
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Cc: David Woodhouse <David.Woodhouse@intel.com>
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Cc: Vivien Chappelier <vivien.chappelier@free.fr>
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Cc: Jim Paris <jim@jtan.com>
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Notes:
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The MTD-based PS3 Video RAM Storage Driver was integrated into the mainline
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kernel in 2.6.29-rc1.
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Ideally, we think it would be best if the existing MTD-based ps3vram driver
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would be replaced by the new block-based ps3vram driver before 2.6.29 is
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released. This would relieve the burden of supporting two different swap space
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schemes on PS3 (swap on /dev/mtdblock0 vs. /dev/ps3vram) from the distro
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maintainer's shoulders, as in that case there would never have been a stable
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kernel version containing the MTD-based ps3vram driver.
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Changes since previous submission (Wed, 4 Mar 2009 14:57:20 +0100 (CET)):
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- Use blk_queue_make_request() to get rid of the thread
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- Add a mutex (cfr. the old driver), as ps3vram_make_request() may be called
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concurrently
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TO DO (after 2.6.29): use a spinlock and a list to queue requests while the
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driver is busy
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- Remove the old MTD-based ps3vram driver and rename ps3vram-ng to ps3vram
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- Make PS3_VRAM depend on FB_PS3=y and m for now
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ps3vram relies on ps3fb being initialized first. The easiest way to do this
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is by making ps3vram modular, and ps3fb builtin
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- Remove the dependency on ps3fb_videomemory.size
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The loop to reduce ddr_size until it succeeds does the right thing anyway,
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and a few MiB of DDR RAM are reserved by the hypervisor
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- lv1 return codes can be int
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- Correct a few debug annotations
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---
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arch/powerpc/platforms/ps3/Kconfig | 7 +
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drivers/block/Makefile | 1 +
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drivers/block/ps3vram.c | 865 ++++++++++++++++++++++++++++++++++++
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create mode 100644 drivers/block/ps3vram.c
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delete mode 100644 drivers/mtd/devices/ps3vram.c
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diff --git a/arch/powerpc/platforms/ps3/Kconfig b/arch/powerpc/platforms/ps3/Kconfig
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index 920cf7a..740ef56 100644
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--- a/arch/powerpc/platforms/ps3/Kconfig
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+++ b/arch/powerpc/platforms/ps3/Kconfig
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@@ -128,6 +128,13 @@ config PS3_FLASH
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be disabled on the kernel command line using "ps3flash=off", to
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not allocate this fixed buffer.
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+config PS3_VRAM
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+ tristate "PS3 Video RAM Storage Driver"
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+ depends on FB_PS3=y && BLOCK && m
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+ help
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+ This driver allows you to use excess PS3 video RAM as volatile
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+ storage or system swap.
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+
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config PS3_LPM
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tristate "PS3 Logical Performance Monitor support"
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depends on PPC_PS3
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diff --git a/drivers/block/Makefile b/drivers/block/Makefile
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index 204332b..87e120e 100644
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--- a/drivers/block/Makefile
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+++ b/drivers/block/Makefile
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@@ -9,6 +9,7 @@ obj-$(CONFIG_MAC_FLOPPY) += swim3.o
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obj-$(CONFIG_BLK_DEV_FD) += floppy.o
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obj-$(CONFIG_AMIGA_FLOPPY) += amiflop.o
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obj-$(CONFIG_PS3_DISK) += ps3disk.o
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+obj-$(CONFIG_PS3_VRAM) += ps3vram.o
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obj-$(CONFIG_ATARI_FLOPPY) += ataflop.o
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obj-$(CONFIG_AMIGA_Z2RAM) += z2ram.o
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obj-$(CONFIG_BLK_DEV_RAM) += brd.o
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diff --git a/drivers/block/ps3vram.c b/drivers/block/ps3vram.c
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new file mode 100644
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index 0000000..393ed67
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--- /dev/null
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+++ b/drivers/block/ps3vram.c
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@@ -0,0 +1,865 @@
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+/*
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+ * ps3vram - Use extra PS3 video ram as MTD block device.
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+ *
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+ * Copyright 2009 Sony Corporation
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+ *
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+ * Based on the MTD ps3vram driver, which is
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+ * Copyright (c) 2007-2008 Jim Paris <jim@jtan.com>
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+ * Added support RSX DMA Vivien Chappelier <vivien.chappelier@free.fr>
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+ */
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+
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+#include <linux/blkdev.h>
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+#include <linux/delay.h>
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+#include <linux/proc_fs.h>
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+#include <linux/seq_file.h>
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+
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+#include <asm/firmware.h>
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+#include <asm/lv1call.h>
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+#include <asm/ps3.h>
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+
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+
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+#define DEVICE_NAME "ps3vram"
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+
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+
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+#define XDR_BUF_SIZE (2 * 1024 * 1024) /* XDR buffer (must be 1MiB aligned) */
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+#define XDR_IOIF 0x0c000000
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+
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+#define FIFO_BASE XDR_IOIF
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+#define FIFO_SIZE (64 * 1024)
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+
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+#define DMA_PAGE_SIZE (4 * 1024)
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+
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+#define CACHE_PAGE_SIZE (256 * 1024)
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+#define CACHE_PAGE_COUNT ((XDR_BUF_SIZE - FIFO_SIZE) / CACHE_PAGE_SIZE)
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+
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+#define CACHE_OFFSET CACHE_PAGE_SIZE
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+#define FIFO_OFFSET 0
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+
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+#define CTRL_PUT 0x10
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+#define CTRL_GET 0x11
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+#define CTRL_TOP 0x15
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+
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+#define UPLOAD_SUBCH 1
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+#define DOWNLOAD_SUBCH 2
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+
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+#define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN 0x0000030c
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+#define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY 0x00000104
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+
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+#define L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT 0x601
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+
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+#define CACHE_PAGE_PRESENT 1
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+#define CACHE_PAGE_DIRTY 2
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+
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+struct ps3vram_tag {
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+ unsigned int address;
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+ unsigned int flags;
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+};
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+
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+struct ps3vram_cache {
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+ unsigned int page_count;
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+ unsigned int page_size;
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+ struct ps3vram_tag *tags;
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+ unsigned int hit;
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+ unsigned int miss;
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+};
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+
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+struct ps3vram_priv {
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+ struct request_queue *queue;
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+ struct gendisk *gendisk;
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+
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+ u64 size;
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+
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+ u64 memory_handle;
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+ u64 context_handle;
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+ u32 *ctrl;
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+ u32 *reports;
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+ u8 __iomem *ddr_base;
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+ u8 *xdr_buf;
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+
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+ u32 *fifo_base;
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+ u32 *fifo_ptr;
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+
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+ struct ps3vram_cache cache;
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+
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+ /* Used to serialize cache/DMA operations */
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+ struct mutex lock;
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+};
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+
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+
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+static int ps3vram_major;
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+
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+
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+static struct block_device_operations ps3vram_fops = {
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+ .owner = THIS_MODULE,
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+};
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+
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+
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+#define DMA_NOTIFIER_HANDLE_BASE 0x66604200 /* first DMA notifier handle */
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+#define DMA_NOTIFIER_OFFSET_BASE 0x1000 /* first DMA notifier offset */
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+#define DMA_NOTIFIER_SIZE 0x40
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+#define NOTIFIER 7 /* notifier used for completion report */
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+
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+static char *size = "256M";
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+module_param(size, charp, 0);
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+MODULE_PARM_DESC(size, "memory size");
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+
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+static u32 *ps3vram_get_notifier(u32 *reports, int notifier)
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+{
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+ return (void *)reports + DMA_NOTIFIER_OFFSET_BASE +
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+ DMA_NOTIFIER_SIZE * notifier;
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+}
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+
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+static void ps3vram_notifier_reset(struct ps3_system_bus_device *dev)
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+{
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+ struct ps3vram_priv *priv = dev->core.driver_data;
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+ u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
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+ int i;
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+
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+ for (i = 0; i < 4; i++)
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+ notify[i] = 0xffffffff;
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+}
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+
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+static int ps3vram_notifier_wait(struct ps3_system_bus_device *dev,
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+ unsigned int timeout_ms)
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+{
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+ struct ps3vram_priv *priv = dev->core.driver_data;
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+ u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
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+ unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
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+
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+ do {
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+ if (!notify[3])
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+ return 0;
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+ msleep(1);
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+ } while (time_before(jiffies, timeout));
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+
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+ return -ETIMEDOUT;
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+}
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+
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+static void ps3vram_init_ring(struct ps3_system_bus_device *dev)
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+{
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+ struct ps3vram_priv *priv = dev->core.driver_data;
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+
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+ priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
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+ priv->ctrl[CTRL_GET] = FIFO_BASE + FIFO_OFFSET;
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+}
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+
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+static int ps3vram_wait_ring(struct ps3_system_bus_device *dev,
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+ unsigned int timeout_ms)
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+{
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+ struct ps3vram_priv *priv = dev->core.driver_data;
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+ unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
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+
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+ do {
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+ if (priv->ctrl[CTRL_PUT] == priv->ctrl[CTRL_GET])
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+ return 0;
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+ msleep(1);
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+ } while (time_before(jiffies, timeout));
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+
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+ dev_warn(&dev->core, "FIFO timeout (%08x/%08x/%08x)\n",
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+ priv->ctrl[CTRL_PUT], priv->ctrl[CTRL_GET],
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+ priv->ctrl[CTRL_TOP]);
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+
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+ return -ETIMEDOUT;
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+}
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+
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+static void ps3vram_out_ring(struct ps3vram_priv *priv, u32 data)
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+{
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+ *(priv->fifo_ptr)++ = data;
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+}
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+
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+static void ps3vram_begin_ring(struct ps3vram_priv *priv, u32 chan, u32 tag,
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+ u32 size)
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+{
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+ ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag);
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+}
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+
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+static void ps3vram_rewind_ring(struct ps3_system_bus_device *dev)
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+{
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+ struct ps3vram_priv *priv = dev->core.driver_data;
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+ int status;
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+
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+ ps3vram_out_ring(priv, 0x20000000 | (FIFO_BASE + FIFO_OFFSET));
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+
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+ priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
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+
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+ /* asking the HV for a blit will kick the FIFO */
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+ status = lv1_gpu_context_attribute(priv->context_handle,
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+ L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT, 0,
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+ 0, 0, 0);
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+ if (status)
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+ dev_err(&dev->core,
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+ "%s: lv1_gpu_context_attribute failed %d\n", __func__,
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+ status);
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+
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+ priv->fifo_ptr = priv->fifo_base;
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+}
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+
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+static void ps3vram_fire_ring(struct ps3_system_bus_device *dev)
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+{
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+ struct ps3vram_priv *priv = dev->core.driver_data;
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+ int status;
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+
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+ mutex_lock(&ps3_gpu_mutex);
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+
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+ priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET +
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+ (priv->fifo_ptr - priv->fifo_base) * sizeof(u32);
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+
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+ /* asking the HV for a blit will kick the FIFO */
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+ status = lv1_gpu_context_attribute(priv->context_handle,
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+ L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT, 0,
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+ 0, 0, 0);
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+ if (status)
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+ dev_err(&dev->core,
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+ "%s: lv1_gpu_context_attribute failed %d\n", __func__,
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+ status);
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+
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+ if ((priv->fifo_ptr - priv->fifo_base) * sizeof(u32) >
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+ FIFO_SIZE - 1024) {
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+ dev_dbg(&dev->core, "FIFO full, rewinding\n");
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+ ps3vram_wait_ring(dev, 200);
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+ ps3vram_rewind_ring(dev);
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+ }
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+
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+ mutex_unlock(&ps3_gpu_mutex);
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+}
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+
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+static void ps3vram_bind(struct ps3_system_bus_device *dev)
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+{
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+ struct ps3vram_priv *priv = dev->core.driver_data;
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+
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+ ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0, 1);
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+ ps3vram_out_ring(priv, 0x31337303);
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+ ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x180, 3);
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+ ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
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+ ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */
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+ ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */
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+
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+ ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0, 1);
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+ ps3vram_out_ring(priv, 0x3137c0de);
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+ ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x180, 3);
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+ ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
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+ ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */
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+ ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */
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+
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+ ps3vram_fire_ring(dev);
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+}
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+
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+static int ps3vram_upload(struct ps3_system_bus_device *dev,
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+ unsigned int src_offset, unsigned int dst_offset,
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+ int len, int count)
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+{
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+ struct ps3vram_priv *priv = dev->core.driver_data;
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+
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+ ps3vram_begin_ring(priv, UPLOAD_SUBCH,
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+ NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
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+ ps3vram_out_ring(priv, XDR_IOIF + src_offset);
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+ ps3vram_out_ring(priv, dst_offset);
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+ ps3vram_out_ring(priv, len);
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+ ps3vram_out_ring(priv, len);
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+ ps3vram_out_ring(priv, len);
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+ ps3vram_out_ring(priv, count);
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+ ps3vram_out_ring(priv, (1 << 8) | 1);
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+ ps3vram_out_ring(priv, 0);
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+
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+ ps3vram_notifier_reset(dev);
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+ ps3vram_begin_ring(priv, UPLOAD_SUBCH,
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+ NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
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+ ps3vram_out_ring(priv, 0);
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+ ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x100, 1);
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+ ps3vram_out_ring(priv, 0);
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+ ps3vram_fire_ring(dev);
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+ if (ps3vram_notifier_wait(dev, 200) < 0) {
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+ dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
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+ return -1;
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+ }
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+
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+ return 0;
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+}
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+
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+static int ps3vram_download(struct ps3_system_bus_device *dev,
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+ unsigned int src_offset, unsigned int dst_offset,
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+ int len, int count)
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+{
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+ struct ps3vram_priv *priv = dev->core.driver_data;
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+
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+ ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
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+ NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
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+ ps3vram_out_ring(priv, src_offset);
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+ ps3vram_out_ring(priv, XDR_IOIF + dst_offset);
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+ ps3vram_out_ring(priv, len);
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+ ps3vram_out_ring(priv, len);
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+ ps3vram_out_ring(priv, len);
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+ ps3vram_out_ring(priv, count);
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+ ps3vram_out_ring(priv, (1 << 8) | 1);
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+ ps3vram_out_ring(priv, 0);
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+
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+ ps3vram_notifier_reset(dev);
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+ ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
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+ NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
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+ ps3vram_out_ring(priv, 0);
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+ ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x100, 1);
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+ ps3vram_out_ring(priv, 0);
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+ ps3vram_fire_ring(dev);
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+ if (ps3vram_notifier_wait(dev, 200) < 0) {
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+ dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
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+ return -1;
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+ }
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+
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+ return 0;
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+}
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+
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+static void ps3vram_cache_evict(struct ps3_system_bus_device *dev, int entry)
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+{
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+ struct ps3vram_priv *priv = dev->core.driver_data;
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+ struct ps3vram_cache *cache = &priv->cache;
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+
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+ if (!(cache->tags[entry].flags & CACHE_PAGE_DIRTY))
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+ return;
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+
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+ dev_dbg(&dev->core, "Flushing %d: 0x%08x\n", entry,
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+ cache->tags[entry].address);
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+ if (ps3vram_upload(dev, CACHE_OFFSET + entry * cache->page_size,
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+ cache->tags[entry].address, DMA_PAGE_SIZE,
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+ cache->page_size / DMA_PAGE_SIZE) < 0) {
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+ dev_err(&dev->core,
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+ "Failed to upload from 0x%x to " "0x%x size 0x%x\n",
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+ entry * cache->page_size, cache->tags[entry].address,
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+ cache->page_size);
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+ }
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+ cache->tags[entry].flags &= ~CACHE_PAGE_DIRTY;
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|
+}
|
|
+
|
|
+static void ps3vram_cache_load(struct ps3_system_bus_device *dev, int entry,
|
|
+ unsigned int address)
|
|
+{
|
|
+ struct ps3vram_priv *priv = dev->core.driver_data;
|
|
+ struct ps3vram_cache *cache = &priv->cache;
|
|
+
|
|
+ dev_dbg(&dev->core, "Fetching %d: 0x%08x\n", entry, address);
|
|
+ if (ps3vram_download(dev, address,
|
|
+ CACHE_OFFSET + entry * cache->page_size,
|
|
+ DMA_PAGE_SIZE,
|
|
+ cache->page_size / DMA_PAGE_SIZE) < 0) {
|
|
+ dev_err(&dev->core,
|
|
+ "Failed to download from 0x%x to 0x%x size 0x%x\n",
|
|
+ address, entry * cache->page_size, cache->page_size);
|
|
+ }
|
|
+
|
|
+ cache->tags[entry].address = address;
|
|
+ cache->tags[entry].flags |= CACHE_PAGE_PRESENT;
|
|
+}
|
|
+
|
|
+
|
|
+static void ps3vram_cache_flush(struct ps3_system_bus_device *dev)
|
|
+{
|
|
+ struct ps3vram_priv *priv = dev->core.driver_data;
|
|
+ struct ps3vram_cache *cache = &priv->cache;
|
|
+ int i;
|
|
+
|
|
+ dev_dbg(&dev->core, "FLUSH\n");
|
|
+ for (i = 0; i < cache->page_count; i++) {
|
|
+ ps3vram_cache_evict(dev, i);
|
|
+ cache->tags[i].flags = 0;
|
|
+ }
|
|
+}
|
|
+
|
|
+static unsigned int ps3vram_cache_match(struct ps3_system_bus_device *dev,
|
|
+ loff_t address)
|
|
+{
|
|
+ struct ps3vram_priv *priv = dev->core.driver_data;
|
|
+ struct ps3vram_cache *cache = &priv->cache;
|
|
+ unsigned int base;
|
|
+ unsigned int offset;
|
|
+ int i;
|
|
+ static int counter;
|
|
+
|
|
+ offset = (unsigned int) (address & (cache->page_size - 1));
|
|
+ base = (unsigned int) (address - offset);
|
|
+
|
|
+ /* fully associative check */
|
|
+ for (i = 0; i < cache->page_count; i++) {
|
|
+ if ((cache->tags[i].flags & CACHE_PAGE_PRESENT) &&
|
|
+ cache->tags[i].address == base) {
|
|
+ cache->hit++;
|
|
+ dev_dbg(&dev->core, "Found entry %d: 0x%08x\n", i,
|
|
+ cache->tags[i].address);
|
|
+ return i;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ /* choose a random entry */
|
|
+ i = (jiffies + (counter++)) % cache->page_count;
|
|
+ dev_dbg(&dev->core, "Using entry %d\n", i);
|
|
+
|
|
+ ps3vram_cache_evict(dev, i);
|
|
+ ps3vram_cache_load(dev, i, base);
|
|
+
|
|
+ cache->miss++;
|
|
+ return i;
|
|
+}
|
|
+
|
|
+static int ps3vram_cache_init(struct ps3_system_bus_device *dev)
|
|
+{
|
|
+ struct ps3vram_priv *priv = dev->core.driver_data;
|
|
+
|
|
+ priv->cache.page_count = CACHE_PAGE_COUNT;
|
|
+ priv->cache.page_size = CACHE_PAGE_SIZE;
|
|
+ priv->cache.tags = kzalloc(sizeof(struct ps3vram_tag) *
|
|
+ CACHE_PAGE_COUNT, GFP_KERNEL);
|
|
+ if (priv->cache.tags == NULL) {
|
|
+ dev_err(&dev->core, "Could not allocate cache tags\n");
|
|
+ return -ENOMEM;
|
|
+ }
|
|
+
|
|
+ dev_info(&dev->core, "Created ram cache: %d entries, %d KiB each\n",
|
|
+ CACHE_PAGE_COUNT, CACHE_PAGE_SIZE / 1024);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static void ps3vram_cache_cleanup(struct ps3_system_bus_device *dev)
|
|
+{
|
|
+ struct ps3vram_priv *priv = dev->core.driver_data;
|
|
+
|
|
+ ps3vram_cache_flush(dev);
|
|
+ kfree(priv->cache.tags);
|
|
+}
|
|
+
|
|
+static int ps3vram_read(struct ps3_system_bus_device *dev, loff_t from,
|
|
+ size_t len, size_t *retlen, u_char *buf)
|
|
+{
|
|
+ struct ps3vram_priv *priv = dev->core.driver_data;
|
|
+ unsigned int cached, count;
|
|
+
|
|
+ dev_dbg(&dev->core, "%s: from=0x%08x len=0x%zx\n", __func__,
|
|
+ (unsigned int)from, len);
|
|
+
|
|
+ if (from >= priv->size)
|
|
+ return -EIO;
|
|
+
|
|
+ if (len > priv->size - from)
|
|
+ len = priv->size - from;
|
|
+
|
|
+ /* Copy from vram to buf */
|
|
+ count = len;
|
|
+ while (count) {
|
|
+ unsigned int offset, avail;
|
|
+ unsigned int entry;
|
|
+
|
|
+ offset = (unsigned int) (from & (priv->cache.page_size - 1));
|
|
+ avail = priv->cache.page_size - offset;
|
|
+
|
|
+ mutex_lock(&priv->lock);
|
|
+
|
|
+ entry = ps3vram_cache_match(dev, from);
|
|
+ cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
|
|
+
|
|
+ dev_dbg(&dev->core, "%s: from=%08x cached=%08x offset=%08x "
|
|
+ "avail=%08x count=%08x\n", __func__,
|
|
+ (unsigned int)from, cached, offset, avail, count);
|
|
+
|
|
+ if (avail > count)
|
|
+ avail = count;
|
|
+ memcpy(buf, priv->xdr_buf + cached, avail);
|
|
+
|
|
+ mutex_unlock(&priv->lock);
|
|
+
|
|
+ buf += avail;
|
|
+ count -= avail;
|
|
+ from += avail;
|
|
+ }
|
|
+
|
|
+ *retlen = len;
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int ps3vram_write(struct ps3_system_bus_device *dev, loff_t to,
|
|
+ size_t len, size_t *retlen, const u_char *buf)
|
|
+{
|
|
+ struct ps3vram_priv *priv = dev->core.driver_data;
|
|
+ unsigned int cached, count;
|
|
+
|
|
+ if (to >= priv->size)
|
|
+ return -EIO;
|
|
+
|
|
+ if (len > priv->size - to)
|
|
+ len = priv->size - to;
|
|
+
|
|
+ /* Copy from buf to vram */
|
|
+ count = len;
|
|
+ while (count) {
|
|
+ unsigned int offset, avail;
|
|
+ unsigned int entry;
|
|
+
|
|
+ offset = (unsigned int) (to & (priv->cache.page_size - 1));
|
|
+ avail = priv->cache.page_size - offset;
|
|
+
|
|
+ mutex_lock(&priv->lock);
|
|
+
|
|
+ entry = ps3vram_cache_match(dev, to);
|
|
+ cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
|
|
+
|
|
+ dev_dbg(&dev->core, "%s: to=%08x cached=%08x offset=%08x "
|
|
+ "avail=%08x count=%08x\n", __func__, (unsigned int)to,
|
|
+ cached, offset, avail, count);
|
|
+
|
|
+ if (avail > count)
|
|
+ avail = count;
|
|
+ memcpy(priv->xdr_buf + cached, buf, avail);
|
|
+
|
|
+ priv->cache.tags[entry].flags |= CACHE_PAGE_DIRTY;
|
|
+
|
|
+ mutex_unlock(&priv->lock);
|
|
+
|
|
+ buf += avail;
|
|
+ count -= avail;
|
|
+ to += avail;
|
|
+ }
|
|
+
|
|
+ *retlen = len;
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int ps3vram_proc_show(struct seq_file *m, void *v)
|
|
+{
|
|
+ struct ps3vram_priv *priv = m->private;
|
|
+
|
|
+ seq_printf(m, "hit:%u\nmiss:%u\n", priv->cache.hit, priv->cache.miss);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int ps3vram_proc_open(struct inode *inode, struct file *file)
|
|
+{
|
|
+ return single_open(file, ps3vram_proc_show, PDE(inode)->data);
|
|
+}
|
|
+
|
|
+static const struct file_operations ps3vram_proc_fops = {
|
|
+ .owner = THIS_MODULE,
|
|
+ .open = ps3vram_proc_open,
|
|
+ .read = seq_read,
|
|
+ .llseek = seq_lseek,
|
|
+ .release = single_release,
|
|
+};
|
|
+
|
|
+static void __devinit ps3vram_proc_init(struct ps3_system_bus_device *dev)
|
|
+{
|
|
+ struct ps3vram_priv *priv = dev->core.driver_data;
|
|
+ struct proc_dir_entry *pde;
|
|
+
|
|
+ pde = proc_create(DEVICE_NAME, 0444, NULL, &ps3vram_proc_fops);
|
|
+ if (!pde) {
|
|
+ dev_warn(&dev->core, "failed to create /proc entry\n");
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ pde->owner = THIS_MODULE;
|
|
+ pde->data = priv;
|
|
+}
|
|
+
|
|
+static int ps3vram_make_request(struct request_queue *q, struct bio *bio)
|
|
+{
|
|
+ struct ps3_system_bus_device *dev = q->queuedata;
|
|
+ int write = bio_data_dir(bio) == WRITE;
|
|
+ const char *op = write ? "write" : "read";
|
|
+ loff_t offset = bio->bi_sector << 9;
|
|
+ int error = 0;
|
|
+ struct bio_vec *bvec;
|
|
+ unsigned int i;
|
|
+
|
|
+ dev_dbg(&dev->core, "%s\n", __func__);
|
|
+
|
|
+ bio_for_each_segment(bvec, bio, i) {
|
|
+ /* PS3 is ppc64, so we don't handle highmem */
|
|
+ char *ptr = page_address(bvec->bv_page) + bvec->bv_offset;
|
|
+ size_t len = bvec->bv_len, retlen;
|
|
+
|
|
+ dev_dbg(&dev->core, " %s %zu bytes at offset %llu\n", op,
|
|
+ len, offset);
|
|
+ if (write)
|
|
+ error = ps3vram_write(dev, offset, len, &retlen, ptr);
|
|
+ else
|
|
+ error = ps3vram_read(dev, offset, len, &retlen, ptr);
|
|
+
|
|
+ if (error) {
|
|
+ dev_err(&dev->core, "%s failed\n", op);
|
|
+ goto out;
|
|
+ }
|
|
+
|
|
+ if (retlen != len) {
|
|
+ dev_err(&dev->core, "Short %s\n", op);
|
|
+ goto out;
|
|
+ }
|
|
+
|
|
+ offset += len;
|
|
+ }
|
|
+
|
|
+ dev_dbg(&dev->core, "%s completed\n", op);
|
|
+
|
|
+out:
|
|
+ bio_endio(bio, error);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int __devinit ps3vram_probe(struct ps3_system_bus_device *dev)
|
|
+{
|
|
+ struct ps3vram_priv *priv;
|
|
+ int error, status;
|
|
+ struct request_queue *queue;
|
|
+ struct gendisk *gendisk;
|
|
+ u64 ddr_lpar, ctrl_lpar, info_lpar, reports_lpar, ddr_size,
|
|
+ reports_size;
|
|
+ char *rest;
|
|
+
|
|
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
|
+ if (!priv) {
|
|
+ error = -ENOMEM;
|
|
+ goto fail;
|
|
+ }
|
|
+
|
|
+ mutex_init(&priv->lock);
|
|
+ dev->core.driver_data = priv;
|
|
+
|
|
+ priv = dev->core.driver_data;
|
|
+
|
|
+ /* Allocate XDR buffer (1MiB aligned) */
|
|
+ priv->xdr_buf = (void *)__get_free_pages(GFP_KERNEL,
|
|
+ get_order(XDR_BUF_SIZE));
|
|
+ if (priv->xdr_buf == NULL) {
|
|
+ dev_err(&dev->core, "Could not allocate XDR buffer\n");
|
|
+ error = -ENOMEM;
|
|
+ goto fail_free_priv;
|
|
+ }
|
|
+
|
|
+ /* Put FIFO at begginning of XDR buffer */
|
|
+ priv->fifo_base = (u32 *) (priv->xdr_buf + FIFO_OFFSET);
|
|
+ priv->fifo_ptr = priv->fifo_base;
|
|
+
|
|
+ /* XXX: Need to open GPU, in case ps3fb or snd_ps3 aren't loaded */
|
|
+ if (ps3_open_hv_device(dev)) {
|
|
+ dev_err(&dev->core, "ps3_open_hv_device failed\n");
|
|
+ error = -EAGAIN;
|
|
+ goto out_close_gpu;
|
|
+ }
|
|
+
|
|
+ /* Request memory */
|
|
+ status = -1;
|
|
+ ddr_size = ALIGN(memparse(size, &rest), 1024*1024);
|
|
+ if (!ddr_size) {
|
|
+ dev_err(&dev->core, "Specified size is too small\n");
|
|
+ error = -EINVAL;
|
|
+ goto out_close_gpu;
|
|
+ }
|
|
+
|
|
+ while (ddr_size > 0) {
|
|
+ status = lv1_gpu_memory_allocate(ddr_size, 0, 0, 0, 0,
|
|
+ &priv->memory_handle,
|
|
+ &ddr_lpar);
|
|
+ if (!status)
|
|
+ break;
|
|
+ ddr_size -= 1024*1024;
|
|
+ }
|
|
+ if (status) {
|
|
+ dev_err(&dev->core, "lv1_gpu_memory_allocate failed %d\n",
|
|
+ status);
|
|
+ error = -ENOMEM;
|
|
+ goto out_free_xdr_buf;
|
|
+ }
|
|
+
|
|
+ /* Request context */
|
|
+ status = lv1_gpu_context_allocate(priv->memory_handle, 0,
|
|
+ &priv->context_handle, &ctrl_lpar,
|
|
+ &info_lpar, &reports_lpar,
|
|
+ &reports_size);
|
|
+ if (status) {
|
|
+ dev_err(&dev->core, "lv1_gpu_context_allocate failed %d\n",
|
|
+ status);
|
|
+ error = -ENOMEM;
|
|
+ goto out_free_memory;
|
|
+ }
|
|
+
|
|
+ /* Map XDR buffer to RSX */
|
|
+ status = lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
|
|
+ ps3_mm_phys_to_lpar(__pa(priv->xdr_buf)),
|
|
+ XDR_BUF_SIZE, 0);
|
|
+ if (status) {
|
|
+ dev_err(&dev->core, "lv1_gpu_context_iomap failed %d\n",
|
|
+ status);
|
|
+ error = -ENOMEM;
|
|
+ goto out_free_context;
|
|
+ }
|
|
+
|
|
+ priv->ddr_base = ioremap_flags(ddr_lpar, ddr_size, _PAGE_NO_CACHE);
|
|
+
|
|
+ if (!priv->ddr_base) {
|
|
+ dev_err(&dev->core, "ioremap DDR failed\n");
|
|
+ error = -ENOMEM;
|
|
+ goto out_free_context;
|
|
+ }
|
|
+
|
|
+ priv->ctrl = ioremap(ctrl_lpar, 64 * 1024);
|
|
+ if (!priv->ctrl) {
|
|
+ dev_err(&dev->core, "ioremap CTRL failed\n");
|
|
+ error = -ENOMEM;
|
|
+ goto out_unmap_vram;
|
|
+ }
|
|
+
|
|
+ priv->reports = ioremap(reports_lpar, reports_size);
|
|
+ if (!priv->reports) {
|
|
+ dev_err(&dev->core, "ioremap REPORTS failed\n");
|
|
+ error = -ENOMEM;
|
|
+ goto out_unmap_ctrl;
|
|
+ }
|
|
+
|
|
+ mutex_lock(&ps3_gpu_mutex);
|
|
+ ps3vram_init_ring(dev);
|
|
+ mutex_unlock(&ps3_gpu_mutex);
|
|
+
|
|
+ priv->size = ddr_size;
|
|
+
|
|
+ ps3vram_bind(dev);
|
|
+
|
|
+ mutex_lock(&ps3_gpu_mutex);
|
|
+ error = ps3vram_wait_ring(dev, 100);
|
|
+ mutex_unlock(&ps3_gpu_mutex);
|
|
+ if (error < 0) {
|
|
+ dev_err(&dev->core, "Failed to initialize channels\n");
|
|
+ error = -ETIMEDOUT;
|
|
+ goto out_unmap_reports;
|
|
+ }
|
|
+
|
|
+ ps3vram_cache_init(dev);
|
|
+ ps3vram_proc_init(dev);
|
|
+
|
|
+ queue = blk_alloc_queue(GFP_KERNEL);
|
|
+ if (!queue) {
|
|
+ dev_err(&dev->core, "blk_alloc_queue failed\n");
|
|
+ error = -ENOMEM;
|
|
+ goto out_cache_cleanup;
|
|
+ }
|
|
+
|
|
+ priv->queue = queue;
|
|
+ queue->queuedata = dev;
|
|
+ blk_queue_make_request(queue, ps3vram_make_request);
|
|
+ blk_queue_max_phys_segments(queue, MAX_PHYS_SEGMENTS);
|
|
+ blk_queue_max_hw_segments(queue, MAX_HW_SEGMENTS);
|
|
+ blk_queue_max_segment_size(queue, MAX_SEGMENT_SIZE);
|
|
+ blk_queue_max_sectors(queue, SAFE_MAX_SECTORS);
|
|
+
|
|
+ gendisk = alloc_disk(1);
|
|
+ if (!gendisk) {
|
|
+ dev_err(&dev->core, "alloc_disk failed\n");
|
|
+ error = -ENOMEM;
|
|
+ goto fail_cleanup_queue;
|
|
+ }
|
|
+
|
|
+ priv->gendisk = gendisk;
|
|
+ gendisk->major = ps3vram_major;
|
|
+ gendisk->first_minor = 0;
|
|
+ gendisk->fops = &ps3vram_fops;
|
|
+ gendisk->queue = queue;
|
|
+ gendisk->private_data = dev;
|
|
+ gendisk->driverfs_dev = &dev->core;
|
|
+ strlcpy(gendisk->disk_name, DEVICE_NAME, sizeof(gendisk->disk_name));
|
|
+ set_capacity(gendisk, priv->size >> 9);
|
|
+
|
|
+ dev_info(&dev->core, "%s: Using %lu MiB of GPU memory\n",
|
|
+ gendisk->disk_name, get_capacity(gendisk) >> 11);
|
|
+
|
|
+ add_disk(gendisk);
|
|
+ return 0;
|
|
+
|
|
+fail_cleanup_queue:
|
|
+ blk_cleanup_queue(queue);
|
|
+out_cache_cleanup:
|
|
+ remove_proc_entry(DEVICE_NAME, NULL);
|
|
+ ps3vram_cache_cleanup(dev);
|
|
+out_unmap_reports:
|
|
+ iounmap(priv->reports);
|
|
+out_unmap_ctrl:
|
|
+ iounmap(priv->ctrl);
|
|
+out_unmap_vram:
|
|
+ iounmap(priv->ddr_base);
|
|
+out_free_context:
|
|
+ lv1_gpu_context_free(priv->context_handle);
|
|
+out_free_memory:
|
|
+ lv1_gpu_memory_free(priv->memory_handle);
|
|
+out_close_gpu:
|
|
+ ps3_close_hv_device(dev);
|
|
+out_free_xdr_buf:
|
|
+ free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
|
|
+fail_free_priv:
|
|
+ kfree(priv);
|
|
+ dev->core.driver_data = NULL;
|
|
+fail:
|
|
+ return error;
|
|
+}
|
|
+
|
|
+static int ps3vram_remove(struct ps3_system_bus_device *dev)
|
|
+{
|
|
+ struct ps3vram_priv *priv = dev->core.driver_data;
|
|
+
|
|
+ del_gendisk(priv->gendisk);
|
|
+ put_disk(priv->gendisk);
|
|
+ blk_cleanup_queue(priv->queue);
|
|
+ remove_proc_entry(DEVICE_NAME, NULL);
|
|
+ ps3vram_cache_cleanup(dev);
|
|
+ iounmap(priv->reports);
|
|
+ iounmap(priv->ctrl);
|
|
+ iounmap(priv->ddr_base);
|
|
+ lv1_gpu_context_free(priv->context_handle);
|
|
+ lv1_gpu_memory_free(priv->memory_handle);
|
|
+ ps3_close_hv_device(dev);
|
|
+ free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
|
|
+ kfree(priv);
|
|
+ dev->core.driver_data = NULL;
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static struct ps3_system_bus_driver ps3vram = {
|
|
+ .match_id = PS3_MATCH_ID_GPU,
|
|
+ .match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK,
|
|
+ .core.name = DEVICE_NAME,
|
|
+ .core.owner = THIS_MODULE,
|
|
+ .probe = ps3vram_probe,
|
|
+ .remove = ps3vram_remove,
|
|
+ .shutdown = ps3vram_remove,
|
|
+};
|
|
+
|
|
+
|
|
+static int __init ps3vram_init(void)
|
|
+{
|
|
+ int error;
|
|
+
|
|
+ if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
|
|
+ return -ENODEV;
|
|
+
|
|
+ error = register_blkdev(0, DEVICE_NAME);
|
|
+ if (error <= 0) {
|
|
+ pr_err("%s: register_blkdev failed %d\n", DEVICE_NAME, error);
|
|
+ return error;
|
|
+ }
|
|
+ ps3vram_major = error;
|
|
+
|
|
+ pr_info("%s: registered block device major %d\n", DEVICE_NAME,
|
|
+ ps3vram_major);
|
|
+
|
|
+ error = ps3_system_bus_driver_register(&ps3vram);
|
|
+ if (error)
|
|
+ unregister_blkdev(ps3vram_major, DEVICE_NAME);
|
|
+
|
|
+ return error;
|
|
+}
|
|
+
|
|
+static void __exit ps3vram_exit(void)
|
|
+{
|
|
+ ps3_system_bus_driver_unregister(&ps3vram);
|
|
+ unregister_blkdev(ps3vram_major, DEVICE_NAME);
|
|
+}
|
|
+
|
|
+module_init(ps3vram_init);
|
|
+module_exit(ps3vram_exit);
|
|
+
|
|
+MODULE_LICENSE("GPL");
|
|
+MODULE_DESCRIPTION("PS3 Video RAM Storage Driver");
|
|
+MODULE_AUTHOR("Sony Corporation");
|
|
+MODULE_ALIAS(PS3_MODULE_ALIAS_GPU_RAMDISK);
|