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kernel-fxtec-pro1x/drivers/gpu/drm/i830/i830_drv.h
Arnd Bergmann 58374713c9 drm: kill BKL from common code 
This restricts the use of the big kernel lock to the i830 and i810
device drivers. The three remaining users in common code (open, ioctl
and release) get converted to a new mutex, the drm_global_mutex,
making the locking stricter than the big kernel lock.

This may have a performance impact, but only in those cases that
currently don't use DRM_UNLOCKED flag in the ioctl list and would
benefit from that anyway.

The reason why i810 and i830 cannot use drm_global_mutex in their
mmap functions is a lock-order inversion problem between the current
use of the BKL and mmap_sem in these drivers. Since the BKL has
release-on-sleep semantics, it's harmless but it would cause trouble
if we replace the BKL with a mutex.

Instead, these drivers get their own ioctl wrappers that take the
BKL around every ioctl call and then set their own handlers as
DRM_UNLOCKED.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: David Airlie <airlied@linux.ie>
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
2010-08-05 11:54:40 +10:00

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/* i830_drv.h -- Private header for the I830 driver -*- linux-c -*-
* Created: Mon Dec 13 01:50:01 1999 by jhartmann@precisioninsight.com
*
* Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
* 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
* PRECISION INSIGHT 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.
*
* Authors: Rickard E. (Rik) Faith <faith@valinux.com>
* Jeff Hartmann <jhartmann@valinux.com>
*
*/
#ifndef _I830_DRV_H_
#define _I830_DRV_H_
/* General customization:
*/
#define DRIVER_AUTHOR "VA Linux Systems Inc."
#define DRIVER_NAME "i830"
#define DRIVER_DESC "Intel 830M"
#define DRIVER_DATE "20021108"
/* Interface history:
*
* 1.1: Original.
* 1.2: ?
* 1.3: New irq emit/wait ioctls.
* New pageflip ioctl.
* New getparam ioctl.
* State for texunits 3&4 in sarea.
* New (alternative) layout for texture state.
*/
#define DRIVER_MAJOR 1
#define DRIVER_MINOR 3
#define DRIVER_PATCHLEVEL 2
/* Driver will work either way: IRQ's save cpu time when waiting for
* the card, but are subject to subtle interactions between bios,
* hardware and the driver.
*/
/* XXX: Add vblank support? */
#define USE_IRQS 0
typedef struct drm_i830_buf_priv {
u32 *in_use;
int my_use_idx;
int currently_mapped;
void __user *virtual;
void *kernel_virtual;
drm_local_map_t map;
} drm_i830_buf_priv_t;
typedef struct _drm_i830_ring_buffer {
int tail_mask;
unsigned long Start;
unsigned long End;
unsigned long Size;
u8 *virtual_start;
int head;
int tail;
int space;
drm_local_map_t map;
} drm_i830_ring_buffer_t;
typedef struct drm_i830_private {
struct drm_local_map *sarea_map;
struct drm_local_map *mmio_map;
drm_i830_sarea_t *sarea_priv;
drm_i830_ring_buffer_t ring;
void *hw_status_page;
unsigned long counter;
dma_addr_t dma_status_page;
struct drm_buf *mmap_buffer;
u32 front_di1, back_di1, zi1;
int back_offset;
int depth_offset;
int front_offset;
int w, h;
int pitch;
int back_pitch;
int depth_pitch;
unsigned int cpp;
int do_boxes;
int dma_used;
int current_page;
int page_flipping;
wait_queue_head_t irq_queue;
atomic_t irq_received;
atomic_t irq_emitted;
int use_mi_batchbuffer_start;
} drm_i830_private_t;
long i830_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
extern struct drm_ioctl_desc i830_ioctls[];
extern int i830_max_ioctl;
/* i830_irq.c */
extern int i830_irq_emit(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern int i830_irq_wait(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern irqreturn_t i830_driver_irq_handler(DRM_IRQ_ARGS);
extern void i830_driver_irq_preinstall(struct drm_device *dev);
extern void i830_driver_irq_postinstall(struct drm_device *dev);
extern void i830_driver_irq_uninstall(struct drm_device *dev);
extern int i830_driver_load(struct drm_device *, unsigned long flags);
extern void i830_driver_preclose(struct drm_device *dev,
struct drm_file *file_priv);
extern void i830_driver_lastclose(struct drm_device *dev);
extern void i830_driver_reclaim_buffers_locked(struct drm_device *dev,
struct drm_file *file_priv);
extern int i830_driver_dma_quiescent(struct drm_device *dev);
extern int i830_driver_device_is_agp(struct drm_device *dev);
#define I830_READ(reg) DRM_READ32(dev_priv->mmio_map, reg)
#define I830_WRITE(reg, val) DRM_WRITE32(dev_priv->mmio_map, reg, val)
#define I830_READ16(reg) DRM_READ16(dev_priv->mmio_map, reg)
#define I830_WRITE16(reg, val) DRM_WRITE16(dev_priv->mmio_map, reg, val)
#define I830_VERBOSE 0
#define RING_LOCALS unsigned int outring, ringmask, outcount; \
volatile char *virt;
#define BEGIN_LP_RING(n) do { \
if (I830_VERBOSE) \
printk("BEGIN_LP_RING(%d)\n", (n)); \
if (dev_priv->ring.space < n*4) \
i830_wait_ring(dev, n*4, __func__); \
outcount = 0; \
outring = dev_priv->ring.tail; \
ringmask = dev_priv->ring.tail_mask; \
virt = dev_priv->ring.virtual_start; \
} while (0)
#define OUT_RING(n) do { \
if (I830_VERBOSE) \
printk(" OUT_RING %x\n", (int)(n)); \
*(volatile unsigned int *)(virt + outring) = n; \
outcount++; \
outring += 4; \
outring &= ringmask; \
} while (0)
#define ADVANCE_LP_RING() do { \
if (I830_VERBOSE) \
printk("ADVANCE_LP_RING %x\n", outring); \
dev_priv->ring.tail = outring; \
dev_priv->ring.space -= outcount * 4; \
I830_WRITE(LP_RING + RING_TAIL, outring); \
} while (0)
extern int i830_wait_ring(struct drm_device *dev, int n, const char *caller);
#define GFX_OP_USER_INTERRUPT ((0<<29)|(2<<23))
#define GFX_OP_BREAKPOINT_INTERRUPT ((0<<29)|(1<<23))
#define CMD_REPORT_HEAD (7<<23)
#define CMD_STORE_DWORD_IDX ((0x21<<23) | 0x1)
#define CMD_OP_BATCH_BUFFER ((0x0<<29)|(0x30<<23)|0x1)
#define STATE3D_LOAD_STATE_IMMEDIATE_2 ((0x3<<29)|(0x1d<<24)|(0x03<<16))
#define LOAD_TEXTURE_MAP0 (1<<11)
#define INST_PARSER_CLIENT 0x00000000
#define INST_OP_FLUSH 0x02000000
#define INST_FLUSH_MAP_CACHE 0x00000001
#define BB1_START_ADDR_MASK (~0x7)
#define BB1_PROTECTED (1<<0)
#define BB1_UNPROTECTED (0<<0)
#define BB2_END_ADDR_MASK (~0x7)
#define I830REG_HWSTAM 0x02098
#define I830REG_INT_IDENTITY_R 0x020a4
#define I830REG_INT_MASK_R 0x020a8
#define I830REG_INT_ENABLE_R 0x020a0
#define I830_IRQ_RESERVED ((1<<13)|(3<<2))
#define LP_RING 0x2030
#define HP_RING 0x2040
#define RING_TAIL 0x00
#define TAIL_ADDR 0x001FFFF8
#define RING_HEAD 0x04
#define HEAD_WRAP_COUNT 0xFFE00000
#define HEAD_WRAP_ONE 0x00200000
#define HEAD_ADDR 0x001FFFFC
#define RING_START 0x08
#define START_ADDR 0x0xFFFFF000
#define RING_LEN 0x0C
#define RING_NR_PAGES 0x001FF000
#define RING_REPORT_MASK 0x00000006
#define RING_REPORT_64K 0x00000002
#define RING_REPORT_128K 0x00000004
#define RING_NO_REPORT 0x00000000
#define RING_VALID_MASK 0x00000001
#define RING_VALID 0x00000001
#define RING_INVALID 0x00000000
#define GFX_OP_SCISSOR ((0x3<<29)|(0x1c<<24)|(0x10<<19))
#define SC_UPDATE_SCISSOR (0x1<<1)
#define SC_ENABLE_MASK (0x1<<0)
#define SC_ENABLE (0x1<<0)
#define GFX_OP_SCISSOR_INFO ((0x3<<29)|(0x1d<<24)|(0x81<<16)|(0x1))
#define SCI_YMIN_MASK (0xffff<<16)
#define SCI_XMIN_MASK (0xffff<<0)
#define SCI_YMAX_MASK (0xffff<<16)
#define SCI_XMAX_MASK (0xffff<<0)
#define GFX_OP_SCISSOR_ENABLE ((0x3<<29)|(0x1c<<24)|(0x10<<19))
#define GFX_OP_SCISSOR_RECT ((0x3<<29)|(0x1d<<24)|(0x81<<16)|1)
#define GFX_OP_COLOR_FACTOR ((0x3<<29)|(0x1d<<24)|(0x1<<16)|0x0)
#define GFX_OP_STIPPLE ((0x3<<29)|(0x1d<<24)|(0x83<<16))
#define GFX_OP_MAP_INFO ((0x3<<29)|(0x1d<<24)|0x4)
#define GFX_OP_DESTBUFFER_VARS ((0x3<<29)|(0x1d<<24)|(0x85<<16)|0x0)
#define GFX_OP_DRAWRECT_INFO ((0x3<<29)|(0x1d<<24)|(0x80<<16)|(0x3))
#define GFX_OP_PRIMITIVE ((0x3<<29)|(0x1f<<24))
#define CMD_OP_DESTBUFFER_INFO ((0x3<<29)|(0x1d<<24)|(0x8e<<16)|1)
#define CMD_OP_DISPLAYBUFFER_INFO ((0x0<<29)|(0x14<<23)|2)
#define ASYNC_FLIP (1<<22)
#define CMD_3D (0x3<<29)
#define STATE3D_CONST_BLEND_COLOR_CMD (CMD_3D|(0x1d<<24)|(0x88<<16))
#define STATE3D_MAP_COORD_SETBIND_CMD (CMD_3D|(0x1d<<24)|(0x02<<16))
#define BR00_BITBLT_CLIENT 0x40000000
#define BR00_OP_COLOR_BLT 0x10000000
#define BR00_OP_SRC_COPY_BLT 0x10C00000
#define BR13_SOLID_PATTERN 0x80000000
#define BUF_3D_ID_COLOR_BACK (0x3<<24)
#define BUF_3D_ID_DEPTH (0x7<<24)
#define BUF_3D_USE_FENCE (1<<23)
#define BUF_3D_PITCH(x) (((x)/4)<<2)
#define CMD_OP_MAP_PALETTE_LOAD ((3<<29)|(0x1d<<24)|(0x82<<16)|255)
#define MAP_PALETTE_NUM(x) ((x<<8) & (1<<8))
#define MAP_PALETTE_BOTH (1<<11)
#define XY_COLOR_BLT_CMD ((2<<29)|(0x50<<22)|0x4)
#define XY_COLOR_BLT_WRITE_ALPHA (1<<21)
#define XY_COLOR_BLT_WRITE_RGB (1<<20)
#define XY_SRC_COPY_BLT_CMD ((2<<29)|(0x53<<22)|6)
#define XY_SRC_COPY_BLT_WRITE_ALPHA (1<<21)
#define XY_SRC_COPY_BLT_WRITE_RGB (1<<20)
#define MI_BATCH_BUFFER ((0x30<<23)|1)
#define MI_BATCH_BUFFER_START (0x31<<23)
#define MI_BATCH_BUFFER_END (0xA<<23)
#define MI_BATCH_NON_SECURE (1)
#define MI_WAIT_FOR_EVENT ((0x3<<23))
#define MI_WAIT_FOR_PLANE_A_FLIP (1<<2)
#define MI_WAIT_FOR_PLANE_A_SCANLINES (1<<1)
#define MI_LOAD_SCAN_LINES_INCL ((0x12<<23))
#endif
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