fbmem.h

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/*
 * Copyright (C) 2010 Francisco Jerez.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */

#define NV04_PFB_BOOT_0                     0x00100000
#   define NV04_PFB_BOOT_0_RAM_AMOUNT           0x00000003
#   define NV04_PFB_BOOT_0_RAM_AMOUNT_32MB          0x00000000
#   define NV04_PFB_BOOT_0_RAM_AMOUNT_4MB           0x00000001
#   define NV04_PFB_BOOT_0_RAM_AMOUNT_8MB           0x00000002
#   define NV04_PFB_BOOT_0_RAM_AMOUNT_16MB          0x00000003
#   define NV04_PFB_BOOT_0_RAM_WIDTH_128            0x00000004
#   define NV04_PFB_BOOT_0_RAM_TYPE             0x00000028
#   define NV04_PFB_BOOT_0_RAM_TYPE_SGRAM_8MBIT     0x00000000
#   define NV04_PFB_BOOT_0_RAM_TYPE_SGRAM_16MBIT        0x00000008
#   define NV04_PFB_BOOT_0_RAM_TYPE_SGRAM_16MBIT_4BANK  0x00000010
#   define NV04_PFB_BOOT_0_RAM_TYPE_SDRAM_16MBIT        0x00000018
#   define NV04_PFB_BOOT_0_RAM_TYPE_SDRAM_64MBIT        0x00000020
#   define NV04_PFB_BOOT_0_RAM_TYPE_SDRAM_64MBITX16     0x00000028
#   define NV04_PFB_BOOT_0_UMA_ENABLE           0x00000100
#   define NV04_PFB_BOOT_0_UMA_SIZE             0x0000f000
#define NV04_PFB_DEBUG_0                    0x00100080
#   define NV04_PFB_DEBUG_0_PAGE_MODE           0x00000001
#   define NV04_PFB_DEBUG_0_REFRESH_OFF         0x00000010
#   define NV04_PFB_DEBUG_0_REFRESH_COUNTX64        0x00003f00
#   define NV04_PFB_DEBUG_0_REFRESH_SLOW_CLK        0x00004000
#   define NV04_PFB_DEBUG_0_SAFE_MODE           0x00008000
#   define NV04_PFB_DEBUG_0_ALOM_ENABLE         0x00010000
#   define NV04_PFB_DEBUG_0_CASOE               0x00100000
#   define NV04_PFB_DEBUG_0_CKE_INVERT          0x10000000
#   define NV04_PFB_DEBUG_0_REFINC              0x20000000
#   define NV04_PFB_DEBUG_0_SAVE_POWER_OFF          0x40000000
#define NV04_PFB_CFG0                       0x00100200
#   define NV04_PFB_CFG0_SCRAMBLE               0x20000000
#define NV04_PFB_CFG1                       0x00100204
#define NV04_PFB_SCRAMBLE(i)                         (0x00100400 + 4 * (i))

#define NV10_PFB_REFCTRL                    0x00100210
#   define NV10_PFB_REFCTRL_VALID_1             (1 << 31)

static inline struct io_mapping *
fbmem_init(struct pci_dev *pdev)
{
    return io_mapping_create_wc(pci_resource_start(pdev, 1),
                    pci_resource_len(pdev, 1));
}

static inline void
fbmem_fini(struct io_mapping *fb)
{
    io_mapping_free(fb);
}

static inline u32
fbmem_peek(struct io_mapping *fb, u32 off)
{
    u8 __iomem *p = io_mapping_map_atomic_wc(fb, off & PAGE_MASK);
    u32 val = ioread32(p + (off & ~PAGE_MASK));
    io_mapping_unmap_atomic(p);
    return val;
}

static inline void
fbmem_poke(struct io_mapping *fb, u32 off, u32 val)
{
    u8 __iomem *p = io_mapping_map_atomic_wc(fb, off & PAGE_MASK);
    iowrite32(val, p + (off & ~PAGE_MASK));
    wmb();
    io_mapping_unmap_atomic(p);
}

static inline bool
fbmem_readback(struct io_mapping *fb, u32 off, u32 val)
{
    fbmem_poke(fb, off, val);
    return val == fbmem_peek(fb, off);
}