diff options
Diffstat (limited to 'shared-core')
| -rw-r--r-- | shared-core/mach64_dma.c | 227 | ||||
| -rw-r--r-- | shared-core/mach64_drv.h | 233 |
2 files changed, 239 insertions, 221 deletions
diff --git a/shared-core/mach64_dma.c b/shared-core/mach64_dma.c index dd3547f8..9aa3f768 100644 --- a/shared-core/mach64_dma.c +++ b/shared-core/mach64_dma.c @@ -559,6 +559,233 @@ void mach64_dump_ring_info(drm_mach64_private_t * dev_priv) /*******************************************************************/ +/** \name DMA descriptor ring macros */ +/*@{*/ + +static __inline__ void mach64_set_dma_eol(volatile u32 * addr) +{ +#if defined(__i386__) + int nr = 31; + + /* Taken from include/asm-i386/bitops.h linux header */ + __asm__ __volatile__("lock;" "btsl %1,%0":"=m"(*addr) + :"Ir"(nr)); +#elif defined(__powerpc__) + u32 old; + u32 mask = cpu_to_le32(MACH64_DMA_EOL); + + /* Taken from the include/asm-ppc/bitops.h linux header */ + __asm__ __volatile__("\n\ +1: lwarx %0,0,%3 \n\ + or %0,%0,%2 \n\ + stwcx. %0,0,%3 \n\ + bne- 1b":"=&r"(old), "=m"(*addr) + :"r"(mask), "r"(addr), "m"(*addr) + :"cc"); +#elif defined(__alpha__) + u32 temp; + u32 mask = MACH64_DMA_EOL; + + /* Taken from the include/asm-alpha/bitops.h linux header */ + __asm__ __volatile__("1: ldl_l %0,%3\n" + " bis %0,%2,%0\n" + " stl_c %0,%1\n" + " beq %0,2f\n" + ".subsection 2\n" + "2: br 1b\n" + ".previous":"=&r"(temp), "=m"(*addr) + :"Ir"(mask), "m"(*addr)); +#else + u32 mask = cpu_to_le32(MACH64_DMA_EOL); + + *addr |= mask; +#endif +} + +static __inline__ void mach64_clear_dma_eol(volatile u32 * addr) +{ +#if defined(__i386__) + int nr = 31; + + /* Taken from include/asm-i386/bitops.h linux header */ + __asm__ __volatile__("lock;" "btrl %1,%0":"=m"(*addr) + :"Ir"(nr)); +#elif defined(__powerpc__) + u32 old; + u32 mask = cpu_to_le32(MACH64_DMA_EOL); + + /* Taken from the include/asm-ppc/bitops.h linux header */ + __asm__ __volatile__("\n\ +1: lwarx %0,0,%3 \n\ + andc %0,%0,%2 \n\ + stwcx. %0,0,%3 \n\ + bne- 1b":"=&r"(old), "=m"(*addr) + :"r"(mask), "r"(addr), "m"(*addr) + :"cc"); +#elif defined(__alpha__) + u32 temp; + u32 mask = ~MACH64_DMA_EOL; + + /* Taken from the include/asm-alpha/bitops.h linux header */ + __asm__ __volatile__("1: ldl_l %0,%3\n" + " and %0,%2,%0\n" + " stl_c %0,%1\n" + " beq %0,2f\n" + ".subsection 2\n" + "2: br 1b\n" + ".previous":"=&r"(temp), "=m"(*addr) + :"Ir"(mask), "m"(*addr)); +#else + u32 mask = cpu_to_le32(~MACH64_DMA_EOL); + + *addr &= mask; +#endif +} + +#define RING_LOCALS \ + int _ring_tail, _ring_write; unsigned int _ring_mask; volatile u32 *_ring + +#define RING_WRITE_OFS _ring_write + +#define BEGIN_RING( n ) \ +do { \ + if ( MACH64_VERBOSE ) { \ + DRM_INFO( "BEGIN_RING( %d ) in %s\n", \ + (n), __FUNCTION__ ); \ + } \ + if ( dev_priv->ring.space <= (n) * sizeof(u32) ) { \ + int ret; \ + if ((ret=mach64_wait_ring( dev_priv, (n) * sizeof(u32))) < 0 ) { \ + DRM_ERROR( "wait_ring failed, resetting engine\n"); \ + mach64_dump_engine_info( dev_priv ); \ + mach64_do_engine_reset( dev_priv ); \ + return ret; \ + } \ + } \ + dev_priv->ring.space -= (n) * sizeof(u32); \ + _ring = (u32 *) dev_priv->ring.start; \ + _ring_tail = _ring_write = dev_priv->ring.tail; \ + _ring_mask = dev_priv->ring.tail_mask; \ +} while (0) + +#define OUT_RING( x ) \ +do { \ + if ( MACH64_VERBOSE ) { \ + DRM_INFO( " OUT_RING( 0x%08x ) at 0x%x\n", \ + (unsigned int)(x), _ring_write ); \ + } \ + _ring[_ring_write++] = cpu_to_le32( x ); \ + _ring_write &= _ring_mask; \ +} while (0) + +#define ADVANCE_RING() \ +do { \ + if ( MACH64_VERBOSE ) { \ + DRM_INFO( "ADVANCE_RING() wr=0x%06x tail=0x%06x\n", \ + _ring_write, _ring_tail ); \ + } \ + DRM_MEMORYBARRIER(); \ + mach64_clear_dma_eol( &_ring[(_ring_tail - 2) & _ring_mask] ); \ + DRM_MEMORYBARRIER(); \ + dev_priv->ring.tail = _ring_write; \ + mach64_ring_tick( dev_priv, &(dev_priv)->ring ); \ +} while (0) + + +int mach64_add_buf_to_ring(drm_mach64_private_t *dev_priv, + drm_mach64_freelist_t *entry) +{ + int bytes, pages, remainder; + u32 address, page; + int i; + struct drm_buf *buf = entry->buf; + RING_LOCALS; + + bytes = buf->used; + address = GETBUFADDR( buf ); + pages = (bytes + MACH64_DMA_CHUNKSIZE - 1) / MACH64_DMA_CHUNKSIZE; + + BEGIN_RING( pages * 4 ); + + for ( i = 0 ; i < pages-1 ; i++ ) { + page = address + i * MACH64_DMA_CHUNKSIZE; + OUT_RING( MACH64_APERTURE_OFFSET + MACH64_BM_ADDR ); + OUT_RING( page ); + OUT_RING( MACH64_DMA_CHUNKSIZE | MACH64_DMA_HOLD_OFFSET ); + OUT_RING( 0 ); + } + + /* generate the final descriptor for any remaining commands in this buffer */ + page = address + i * MACH64_DMA_CHUNKSIZE; + remainder = bytes - i * MACH64_DMA_CHUNKSIZE; + + /* Save dword offset of last descriptor for this buffer. + * This is needed to check for completion of the buffer in freelist_get + */ + entry->ring_ofs = RING_WRITE_OFS; + + OUT_RING( MACH64_APERTURE_OFFSET + MACH64_BM_ADDR ); + OUT_RING( page ); + OUT_RING( remainder | MACH64_DMA_HOLD_OFFSET | MACH64_DMA_EOL ); + OUT_RING( 0 ); + + ADVANCE_RING(); + + return 0; +} + +int mach64_add_hostdata_buf_to_ring(drm_mach64_private_t *dev_priv, + drm_mach64_freelist_t *entry) +{ + int bytes, pages, remainder; + u32 address, page; + int i; + struct drm_buf *buf = entry->buf; + RING_LOCALS; + + bytes = buf->used - MACH64_HOSTDATA_BLIT_OFFSET; + pages = (bytes + MACH64_DMA_CHUNKSIZE - 1) / MACH64_DMA_CHUNKSIZE; + address = GETBUFADDR( buf ); + + BEGIN_RING( 4 + pages * 4 ); + + OUT_RING( MACH64_APERTURE_OFFSET + MACH64_BM_ADDR ); + OUT_RING( address ); + OUT_RING( MACH64_HOSTDATA_BLIT_OFFSET | MACH64_DMA_HOLD_OFFSET ); + OUT_RING( 0 ); + address += MACH64_HOSTDATA_BLIT_OFFSET; + + for ( i = 0 ; i < pages-1 ; i++ ) { + page = address + i * MACH64_DMA_CHUNKSIZE; + OUT_RING( MACH64_APERTURE_OFFSET + MACH64_BM_HOSTDATA ); + OUT_RING( page ); + OUT_RING( MACH64_DMA_CHUNKSIZE | MACH64_DMA_HOLD_OFFSET ); + OUT_RING( 0 ); + } + + /* generate the final descriptor for any remaining commands in this buffer */ + page = address + i * MACH64_DMA_CHUNKSIZE; + remainder = bytes - i * MACH64_DMA_CHUNKSIZE; + + /* Save dword offset of last descriptor for this buffer. + * This is needed to check for completion of the buffer in freelist_get + */ + entry->ring_ofs = RING_WRITE_OFS; + + OUT_RING( MACH64_APERTURE_OFFSET + MACH64_BM_HOSTDATA ); + OUT_RING( page ); + OUT_RING( remainder | MACH64_DMA_HOLD_OFFSET | MACH64_DMA_EOL ); + OUT_RING( 0 ); + + ADVANCE_RING(); + + return 0; +} + +/*@}*/ + + +/*******************************************************************/ /** \name DMA test and initialization */ /*@{*/ diff --git a/shared-core/mach64_drv.h b/shared-core/mach64_drv.h index 347c9426..7bd40a68 100644 --- a/shared-core/mach64_drv.h +++ b/shared-core/mach64_drv.h @@ -140,6 +140,11 @@ extern void mach64_dump_engine_info(drm_mach64_private_t * dev_priv); extern void mach64_dump_ring_info(drm_mach64_private_t * dev_priv); extern int mach64_do_engine_reset(drm_mach64_private_t * dev_priv); +extern int mach64_add_buf_to_ring(drm_mach64_private_t *dev_priv, + drm_mach64_freelist_t *_entry); +extern int mach64_add_hostdata_buf_to_ring(drm_mach64_private_t *dev_priv, + drm_mach64_freelist_t *_entry); + extern int mach64_do_dma_idle(drm_mach64_private_t * dev_priv); extern int mach64_do_dma_flush(drm_mach64_private_t * dev_priv); extern int mach64_do_cleanup_dma(struct drm_device * dev); @@ -521,89 +526,9 @@ extern void mach64_driver_irq_uninstall(struct drm_device * dev); #define MACH64_APERTURE_OFFSET 0x7ff800 /* frame-buffer offset for gui-masters */ /* ================================================================ - * Misc helper macros + * Ring operations */ -static __inline__ void mach64_set_dma_eol(volatile u32 * addr) -{ -#if defined(__i386__) - int nr = 31; - - /* Taken from include/asm-i386/bitops.h linux header */ - __asm__ __volatile__("lock;" "btsl %1,%0":"=m"(*addr) - :"Ir"(nr)); -#elif defined(__powerpc__) - u32 old; - u32 mask = cpu_to_le32(MACH64_DMA_EOL); - - /* Taken from the include/asm-ppc/bitops.h linux header */ - __asm__ __volatile__("\n\ -1: lwarx %0,0,%3 \n\ - or %0,%0,%2 \n\ - stwcx. %0,0,%3 \n\ - bne- 1b":"=&r"(old), "=m"(*addr) - :"r"(mask), "r"(addr), "m"(*addr) - :"cc"); -#elif defined(__alpha__) - u32 temp; - u32 mask = MACH64_DMA_EOL; - - /* Taken from the include/asm-alpha/bitops.h linux header */ - __asm__ __volatile__("1: ldl_l %0,%3\n" - " bis %0,%2,%0\n" - " stl_c %0,%1\n" - " beq %0,2f\n" - ".subsection 2\n" - "2: br 1b\n" - ".previous":"=&r"(temp), "=m"(*addr) - :"Ir"(mask), "m"(*addr)); -#else - u32 mask = cpu_to_le32(MACH64_DMA_EOL); - - *addr |= mask; -#endif -} - -static __inline__ void mach64_clear_dma_eol(volatile u32 * addr) -{ -#if defined(__i386__) - int nr = 31; - - /* Taken from include/asm-i386/bitops.h linux header */ - __asm__ __volatile__("lock;" "btrl %1,%0":"=m"(*addr) - :"Ir"(nr)); -#elif defined(__powerpc__) - u32 old; - u32 mask = cpu_to_le32(MACH64_DMA_EOL); - - /* Taken from the include/asm-ppc/bitops.h linux header */ - __asm__ __volatile__("\n\ -1: lwarx %0,0,%3 \n\ - andc %0,%0,%2 \n\ - stwcx. %0,0,%3 \n\ - bne- 1b":"=&r"(old), "=m"(*addr) - :"r"(mask), "r"(addr), "m"(*addr) - :"cc"); -#elif defined(__alpha__) - u32 temp; - u32 mask = ~MACH64_DMA_EOL; - - /* Taken from the include/asm-alpha/bitops.h linux header */ - __asm__ __volatile__("1: ldl_l %0,%3\n" - " and %0,%2,%0\n" - " stl_c %0,%1\n" - " beq %0,2f\n" - ".subsection 2\n" - "2: br 1b\n" - ".previous":"=&r"(temp), "=m"(*addr) - :"Ir"(mask), "m"(*addr)); -#else - u32 mask = cpu_to_le32(~MACH64_DMA_EOL); - - *addr &= mask; -#endif -} - static __inline__ void mach64_ring_start(drm_mach64_private_t * dev_priv) { drm_mach64_descriptor_ring_t *ring = &dev_priv->ring; @@ -750,59 +675,6 @@ mach64_update_ring_snapshot(drm_mach64_private_t * dev_priv) } /* ================================================================ - * DMA descriptor ring macros - */ - -#define RING_LOCALS \ - int _ring_tail, _ring_write; unsigned int _ring_mask; volatile u32 *_ring - -#define RING_WRITE_OFS _ring_write - -#define BEGIN_RING( n ) \ -do { \ - if ( MACH64_VERBOSE ) { \ - DRM_INFO( "BEGIN_RING( %d ) in %s\n", \ - (n), __FUNCTION__ ); \ - } \ - if ( dev_priv->ring.space <= (n) * sizeof(u32) ) { \ - int ret; \ - if ((ret=mach64_wait_ring( dev_priv, (n) * sizeof(u32))) < 0 ) { \ - DRM_ERROR( "wait_ring failed, resetting engine\n"); \ - mach64_dump_engine_info( dev_priv ); \ - mach64_do_engine_reset( dev_priv ); \ - return ret; \ - } \ - } \ - dev_priv->ring.space -= (n) * sizeof(u32); \ - _ring = (u32 *) dev_priv->ring.start; \ - _ring_tail = _ring_write = dev_priv->ring.tail; \ - _ring_mask = dev_priv->ring.tail_mask; \ -} while (0) - -#define OUT_RING( x ) \ -do { \ - if ( MACH64_VERBOSE ) { \ - DRM_INFO( " OUT_RING( 0x%08x ) at 0x%x\n", \ - (unsigned int)(x), _ring_write ); \ - } \ - _ring[_ring_write++] = cpu_to_le32( x ); \ - _ring_write &= _ring_mask; \ -} while (0) - -#define ADVANCE_RING() \ -do { \ - if ( MACH64_VERBOSE ) { \ - DRM_INFO( "ADVANCE_RING() wr=0x%06x tail=0x%06x\n", \ - _ring_write, _ring_tail ); \ - } \ - DRM_MEMORYBARRIER(); \ - mach64_clear_dma_eol( &_ring[(_ring_tail - 2) & _ring_mask] ); \ - DRM_MEMORYBARRIER(); \ - dev_priv->ring.tail = _ring_write; \ - mach64_ring_tick( dev_priv, &(dev_priv)->ring ); \ -} while (0) - -/* ================================================================ * DMA macros */ @@ -889,7 +761,7 @@ do { \ #define DMAADVANCE( dev_priv, _discard ) \ do { \ struct list_head *ptr; \ - RING_LOCALS; \ + int ret; \ \ if ( MACH64_VERBOSE ) { \ DRM_INFO( "DMAADVANCE() in %s\n", __FUNCTION__ ); \ @@ -902,7 +774,6 @@ do { \ } \ if (_buf->pending) { \ /* This is a resued buffer, so we need to find it in the pending list */ \ - int ret; \ if ( (ret=mach64_find_pending_buf_entry(dev_priv, &_entry, _buf)) ) { \ DRM_ERROR( "DMAADVANCE() in %s: couldn't find pending buf %d\n", \ __FUNCTION__, _buf->idx ); \ @@ -927,7 +798,8 @@ do { \ list_add_tail(ptr, &dev_priv->pending); \ } \ _entry->discard = (_discard); \ - ADD_BUF_TO_RING( dev_priv ); \ + if ( (ret = mach64_add_buf_to_ring( dev_priv, _entry )) ) \ + return ret; \ } while (0) #define DMADISCARDBUF() \ @@ -943,48 +815,10 @@ do { \ _entry->discard = 1; \ } while(0) -#define ADD_BUF_TO_RING( dev_priv ) \ -do { \ - int bytes, pages, remainder; \ - u32 address, page; \ - int i; \ - \ - bytes = _buf->used; \ - address = GETBUFADDR( _buf ); \ - \ - pages = (bytes + MACH64_DMA_CHUNKSIZE - 1) / MACH64_DMA_CHUNKSIZE; \ - \ - BEGIN_RING( pages * 4 ); \ - \ - for ( i = 0 ; i < pages-1 ; i++ ) { \ - page = address + i * MACH64_DMA_CHUNKSIZE; \ - OUT_RING( MACH64_APERTURE_OFFSET + MACH64_BM_ADDR ); \ - OUT_RING( page ); \ - OUT_RING( MACH64_DMA_CHUNKSIZE | MACH64_DMA_HOLD_OFFSET ); \ - OUT_RING( 0 ); \ - } \ - \ - /* generate the final descriptor for any remaining commands in this buffer */ \ - page = address + i * MACH64_DMA_CHUNKSIZE; \ - remainder = bytes - i * MACH64_DMA_CHUNKSIZE; \ - \ - /* Save dword offset of last descriptor for this buffer. \ - * This is needed to check for completion of the buffer in freelist_get \ - */ \ - _entry->ring_ofs = RING_WRITE_OFS; \ - \ - OUT_RING( MACH64_APERTURE_OFFSET + MACH64_BM_ADDR ); \ - OUT_RING( page ); \ - OUT_RING( remainder | MACH64_DMA_HOLD_OFFSET | MACH64_DMA_EOL ); \ - OUT_RING( 0 ); \ - \ - ADVANCE_RING(); \ -} while(0) - #define DMAADVANCEHOSTDATA( dev_priv ) \ do { \ struct list_head *ptr; \ - RING_LOCALS; \ + int ret; \ \ if ( MACH64_VERBOSE ) { \ DRM_INFO( "DMAADVANCEHOSTDATA() in %s\n", __FUNCTION__ ); \ @@ -1008,51 +842,8 @@ do { \ _entry->buf->pending = 1; \ list_add_tail(ptr, &dev_priv->pending); \ _entry->discard = 1; \ - ADD_HOSTDATA_BUF_TO_RING( dev_priv ); \ + if ( (ret = mach64_add_hostdata_buf_to_ring( dev_priv, _entry )) ) \ + return ret; \ } while (0) -#define ADD_HOSTDATA_BUF_TO_RING( dev_priv ) \ -do { \ - int bytes, pages, remainder; \ - u32 address, page; \ - int i; \ - \ - bytes = _buf->used - MACH64_HOSTDATA_BLIT_OFFSET; \ - pages = (bytes + MACH64_DMA_CHUNKSIZE - 1) / MACH64_DMA_CHUNKSIZE; \ - address = GETBUFADDR( _buf ); \ - \ - BEGIN_RING( 4 + pages * 4 ); \ - \ - OUT_RING( MACH64_APERTURE_OFFSET + MACH64_BM_ADDR ); \ - OUT_RING( address ); \ - OUT_RING( MACH64_HOSTDATA_BLIT_OFFSET | MACH64_DMA_HOLD_OFFSET ); \ - OUT_RING( 0 ); \ - \ - address += MACH64_HOSTDATA_BLIT_OFFSET; \ - \ - for ( i = 0 ; i < pages-1 ; i++ ) { \ - page = address + i * MACH64_DMA_CHUNKSIZE; \ - OUT_RING( MACH64_APERTURE_OFFSET + MACH64_BM_HOSTDATA ); \ - OUT_RING( page ); \ - OUT_RING( MACH64_DMA_CHUNKSIZE | MACH64_DMA_HOLD_OFFSET ); \ - OUT_RING( 0 ); \ - } \ - \ - /* generate the final descriptor for any remaining commands in this buffer */ \ - page = address + i * MACH64_DMA_CHUNKSIZE; \ - remainder = bytes - i * MACH64_DMA_CHUNKSIZE; \ - \ - /* Save dword offset of last descriptor for this buffer. \ - * This is needed to check for completion of the buffer in freelist_get \ - */ \ - _entry->ring_ofs = RING_WRITE_OFS; \ - \ - OUT_RING( MACH64_APERTURE_OFFSET + MACH64_BM_HOSTDATA ); \ - OUT_RING( page ); \ - OUT_RING( remainder | MACH64_DMA_HOLD_OFFSET | MACH64_DMA_EOL ); \ - OUT_RING( 0 ); \ - \ - ADVANCE_RING(); \ -} while(0) - #endif /* __MACH64_DRV_H__ */ |