/* radeon_cp.c -- CP support for Radeon -*- linux-c -*- * * Copyright 2000 Precision Insight, Inc., Cedar Park, Texas. * Copyright 2000 VA Linux Systems, Inc., Fremont, 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: * Kevin E. Martin * Gareth Hughes */ #define __NO_VERSION__ #include "radeon.h" #include "drmP.h" #include "radeon_drv.h" #include /* For task queue support */ #include #define RADEON_FIFO_DEBUG 0 #if defined(__alpha__) # define PCIGART_ENABLED #else # undef PCIGART_ENABLED #endif /* CP microcode (from ATI) */ static u32 radeon_cp_microcode[][2] = { { 0x21007000, 0000000000 }, { 0x20007000, 0000000000 }, { 0x000000b4, 0x00000004 }, { 0x000000b8, 0x00000004 }, { 0x6f5b4d4c, 0000000000 }, { 0x4c4c427f, 0000000000 }, { 0x5b568a92, 0000000000 }, { 0x4ca09c6d, 0000000000 }, { 0xad4c4c4c, 0000000000 }, { 0x4ce1af3d, 0000000000 }, { 0xd8afafaf, 0000000000 }, { 0xd64c4cdc, 0000000000 }, { 0x4cd10d10, 0000000000 }, { 0x000f0000, 0x00000016 }, { 0x362f242d, 0000000000 }, { 0x00000012, 0x00000004 }, { 0x000f0000, 0x00000016 }, { 0x362f282d, 0000000000 }, { 0x000380e7, 0x00000002 }, { 0x04002c97, 0x00000002 }, { 0x000f0001, 0x00000016 }, { 0x333a3730, 0000000000 }, { 0x000077ef, 0x00000002 }, { 0x00061000, 0x00000002 }, { 0x00000021, 0x0000001a }, { 0x00004000, 0x0000001e }, { 0x00061000, 0x00000002 }, { 0x00000021, 0x0000001a }, { 0x00004000, 0x0000001e }, { 0x00061000, 0x00000002 }, { 0x00000021, 0x0000001a }, { 0x00004000, 0x0000001e }, { 0x00000017, 0x00000004 }, { 0x0003802b, 0x00000002 }, { 0x040067e0, 0x00000002 }, { 0x00000017, 0x00000004 }, { 0x000077e0, 0x00000002 }, { 0x00065000, 0x00000002 }, { 0x000037e1, 0x00000002 }, { 0x040067e1, 0x00000006 }, { 0x000077e0, 0x00000002 }, { 0x000077e1, 0x00000002 }, { 0x000077e1, 0x00000006 }, { 0xffffffff, 0000000000 }, { 0x10000000, 0000000000 }, { 0x0003802b, 0x00000002 }, { 0x040067e0, 0x00000006 }, { 0x00007675, 0x00000002 }, { 0x00007676, 0x00000002 }, { 0x00007677, 0x00000002 }, { 0x00007678, 0x00000006 }, { 0x0003802c, 0x00000002 }, { 0x04002676, 0x00000002 }, { 0x00007677, 0x00000002 }, { 0x00007678, 0x00000006 }, { 0x0000002f, 0x00000018 }, { 0x0000002f, 0x00000018 }, { 0000000000, 0x00000006 }, { 0x00000030, 0x00000018 }, { 0x00000030, 0x00000018 }, { 0000000000, 0x00000006 }, { 0x01605000, 0x00000002 }, { 0x00065000, 0x00000002 }, { 0x00098000, 0x00000002 }, { 0x00061000, 0x00000002 }, { 0x64c0603e, 0x00000004 }, { 0x000380e6, 0x00000002 }, { 0x040025c5, 0x00000002 }, { 0x00080000, 0x00000016 }, { 0000000000, 0000000000 }, { 0x0400251d, 0x00000002 }, { 0x00007580, 0x00000002 }, { 0x00067581, 0x00000002 }, { 0x04002580, 0x00000002 }, { 0x00067581, 0x00000002 }, { 0x00000049, 0x00000004 }, { 0x00005000, 0000000000 }, { 0x000380e6, 0x00000002 }, { 0x040025c5, 0x00000002 }, { 0x00061000, 0x00000002 }, { 0x0000750e, 0x00000002 }, { 0x00019000, 0x00000002 }, { 0x00011055, 0x00000014 }, { 0x00000055, 0x00000012 }, { 0x0400250f, 0x00000002 }, { 0x0000504f, 0x00000004 }, { 0x000380e6, 0x00000002 }, { 0x040025c5, 0x00000002 }, { 0x00007565, 0x00000002 }, { 0x00007566, 0x00000002 }, { 0x00000058, 0x00000004 }, { 0x000380e6, 0x00000002 }, { 0x040025c5, 0x00000002 }, { 0x01e655b4, 0x00000002 }, { 0x4401b0e4, 0x00000002 }, { 0x01c110e4, 0x00000002 }, { 0x26667066, 0x00000018 }, { 0x040c2565, 0x00000002 }, { 0x00000066, 0x00000018 }, { 0x04002564, 0x00000002 }, { 0x00007566, 0x00000002 }, { 0x0000005d, 0x00000004 }, { 0x00401069, 0x00000008 }, { 0x00101000, 0x00000002 }, { 0x000d80ff, 0x00000002 }, { 0x0080006c, 0x00000008 }, { 0x000f9000, 0x00000002 }, { 0x000e00ff, 0x00000002 }, { 0000000000, 0x00000006 }, { 0x0000008f, 0x00000018 }, { 0x0000005b, 0x00000004 }, { 0x000380e6, 0x00000002 }, { 0x040025c5, 0x00000002 }, { 0x00007576, 0x00000002 }, { 0x00065000, 0x00000002 }, { 0x00009000, 0x00000002 }, { 0x00041000, 0x00000002 }, { 0x0c00350e, 0x00000002 }, { 0x00049000, 0x00000002 }, { 0x00051000, 0x00000002 }, { 0x01e785f8, 0x00000002 }, { 0x00200000, 0x00000002 }, { 0x0060007e, 0x0000000c }, { 0x00007563, 0x00000002 }, { 0x006075f0, 0x00000021 }, { 0x20007073, 0x00000004 }, { 0x00005073, 0x00000004 }, { 0x000380e6, 0x00000002 }, { 0x040025c5, 0x00000002 }, { 0x00007576, 0x00000002 }, { 0x00007577, 0x00000002 }, { 0x0000750e, 0x00000002 }, { 0x0000750f, 0x00000002 }, { 0x00a05000, 0x00000002 }, { 0x00600083, 0x0000000c }, { 0x006075f0, 0x00000021 }, { 0x000075f8, 0x00000002 }, { 0x00000083, 0x00000004 }, { 0x000a750e, 0x00000002 }, { 0x000380e6, 0x00000002 }, { 0x040025c5, 0x00000002 }, { 0x0020750f, 0x00000002 }, { 0x00600086, 0x00000004 }, { 0x00007570, 0x00000002 }, { 0x00007571, 0x00000002 }, { 0x00007572, 0x00000006 }, { 0x000380e6, 0x00000002 }, { 0x040025c5, 0x00000002 }, { 0x00005000, 0x00000002 }, { 0x00a05000, 0x00000002 }, { 0x00007568, 0x00000002 }, { 0x00061000, 0x00000002 }, { 0x00000095, 0x0000000c }, { 0x00058000, 0x00000002 }, { 0x0c607562, 0x00000002 }, { 0x00000097, 0x00000004 }, { 0x000380e6, 0x00000002 }, { 0x040025c5, 0x00000002 }, { 0x00600096, 0x00000004 }, { 0x400070e5, 0000000000 }, { 0x000380e6, 0x00000002 }, { 0x040025c5, 0x00000002 }, { 0x000380e5, 0x00000002 }, { 0x000000a8, 0x0000001c }, { 0x000650aa, 0x00000018 }, { 0x040025bb, 0x00000002 }, { 0x000610ab, 0x00000018 }, { 0x040075bc, 0000000000 }, { 0x000075bb, 0x00000002 }, { 0x000075bc, 0000000000 }, { 0x00090000, 0x00000006 }, { 0x00090000, 0x00000002 }, { 0x000d8002, 0x00000006 }, { 0x00007832, 0x00000002 }, { 0x00005000, 0x00000002 }, { 0x000380e7, 0x00000002 }, { 0x04002c97, 0x00000002 }, { 0x00007820, 0x00000002 }, { 0x00007821, 0x00000002 }, { 0x00007800, 0000000000 }, { 0x01200000, 0x00000002 }, { 0x20077000, 0x00000002 }, { 0x01200000, 0x00000002 }, { 0x20007000, 0x00000002 }, { 0x00061000, 0x00000002 }, { 0x0120751b, 0x00000002 }, { 0x8040750a, 0x00000002 }, { 0x8040750b, 0x00000002 }, { 0x00110000, 0x00000002 }, { 0x000380e5, 0x00000002 }, { 0x000000c6, 0x0000001c }, { 0x000610ab, 0x00000018 }, { 0x844075bd, 0x00000002 }, { 0x000610aa, 0x00000018 }, { 0x840075bb, 0x00000002 }, { 0x000610ab, 0x00000018 }, { 0x844075bc, 0x00000002 }, { 0x000000c9, 0x00000004 }, { 0x804075bd, 0x00000002 }, { 0x800075bb, 0x00000002 }, { 0x804075bc, 0x00000002 }, { 0x00108000, 0x00000002 }, { 0x01400000, 0x00000002 }, { 0x006000cd, 0x0000000c }, { 0x20c07000, 0x00000020 }, { 0x000000cf, 0x00000012 }, { 0x00800000, 0x00000006 }, { 0x0080751d, 0x00000006 }, { 0000000000, 0000000000 }, { 0x0000775c, 0x00000002 }, { 0x00a05000, 0x00000002 }, { 0x00661000, 0x00000002 }, { 0x0460275d, 0x00000020 }, { 0x00004000, 0000000000 }, { 0x01e00830, 0x00000002 }, { 0x21007000, 0000000000 }, { 0x6464614d, 0000000000 }, { 0x69687420, 0000000000 }, { 0x00000073, 0000000000 }, { 0000000000, 0000000000 }, { 0x00005000, 0x00000002 }, { 0x000380d0, 0x00000002 }, { 0x040025e0, 0x00000002 }, { 0x000075e1, 0000000000 }, { 0x00000001, 0000000000 }, { 0x000380e0, 0x00000002 }, { 0x04002394, 0x00000002 }, { 0x00005000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0x00000008, 0000000000 }, { 0x00000004, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, { 0000000000, 0000000000 }, }; int RADEON_READ_PLL(drm_device_t *dev, int addr) { drm_radeon_private_t *dev_priv = dev->dev_private; RADEON_WRITE8(RADEON_CLOCK_CNTL_INDEX, addr & 0x1f); return RADEON_READ(RADEON_CLOCK_CNTL_DATA); } #if RADEON_FIFO_DEBUG static void radeon_status( drm_radeon_private_t *dev_priv ) { printk( "%s:\n", __FUNCTION__ ); printk( "RBBM_STATUS = 0x%08x\n", (unsigned int)RADEON_READ( RADEON_RBBM_STATUS ) ); printk( "CP_RB_RTPR = 0x%08x\n", (unsigned int)RADEON_READ( RADEON_CP_RB_RPTR ) ); printk( "CP_RB_WTPR = 0x%08x\n", (unsigned int)RADEON_READ( RADEON_CP_RB_WPTR ) ); printk( "AIC_CNTL = 0x%08x\n", (unsigned int)RADEON_READ( RADEON_AIC_CNTL ) ); printk( "AIC_STAT = 0x%08x\n", (unsigned int)RADEON_READ( RADEON_AIC_STAT ) ); printk( "AIC_PT_BASE = 0x%08x\n", (unsigned int)RADEON_READ( RADEON_AIC_PT_BASE ) ); printk( "TLB_ADDR = 0x%08x\n", (unsigned int)RADEON_READ( RADEON_AIC_TLB_ADDR ) ); printk( "TLB_DATA = 0x%08x\n", (unsigned int)RADEON_READ( RADEON_AIC_TLB_DATA ) ); } #endif /* ================================================================ * Engine, FIFO control */ static int radeon_do_pixcache_flush( drm_radeon_private_t *dev_priv ) { u32 tmp; int i; tmp = RADEON_READ( RADEON_RB2D_DSTCACHE_CTLSTAT ); tmp |= RADEON_RB2D_DC_FLUSH_ALL; RADEON_WRITE( RADEON_RB2D_DSTCACHE_CTLSTAT, tmp ); for ( i = 0 ; i < dev_priv->usec_timeout ; i++ ) { if ( !(RADEON_READ( RADEON_RB2D_DSTCACHE_CTLSTAT ) & RADEON_RB2D_DC_BUSY) ) { return 0; } udelay( 1 ); } #if RADEON_FIFO_DEBUG DRM_ERROR( "failed!\n" ); radeon_status( dev_priv ); #endif return -EBUSY; } static int radeon_do_wait_for_fifo( drm_radeon_private_t *dev_priv, int entries ) { int i; for ( i = 0 ; i < dev_priv->usec_timeout ; i++ ) { int slots = ( RADEON_READ( RADEON_RBBM_STATUS ) & RADEON_RBBM_FIFOCNT_MASK ); if ( slots >= entries ) return 0; udelay( 1 ); } #if RADEON_FIFO_DEBUG DRM_ERROR( "failed!\n" ); radeon_status( dev_priv ); #endif return -EBUSY; } static int radeon_do_wait_for_idle( drm_radeon_private_t *dev_priv ) { int i, ret; ret = radeon_do_wait_for_fifo( dev_priv, 64 ); if ( ret < 0 ) return ret; for ( i = 0 ; i < dev_priv->usec_timeout ; i++ ) { if ( !(RADEON_READ( RADEON_RBBM_STATUS ) & RADEON_RBBM_ACTIVE) ) { radeon_do_pixcache_flush( dev_priv ); return 0; } udelay( 1 ); } #if RADEON_FIFO_DEBUG DRM_ERROR( "failed!\n" ); radeon_status( dev_priv ); #endif return -EBUSY; } /* ================================================================ * CP control, initialization */ /* Load the microcode for the CP */ static void radeon_cp_load_microcode( drm_radeon_private_t *dev_priv ) { int i; DRM_DEBUG( "%s\n", __FUNCTION__ ); radeon_do_wait_for_idle( dev_priv ); RADEON_WRITE( RADEON_CP_ME_RAM_ADDR, 0 ); for ( i = 0 ; i < 256 ; i++ ) { RADEON_WRITE( RADEON_CP_ME_RAM_DATAH, radeon_cp_microcode[i][1] ); RADEON_WRITE( RADEON_CP_ME_RAM_DATAL, radeon_cp_microcode[i][0] ); } } /* Flush any pending commands to the CP. This should only be used just * prior to a wait for idle, as it informs the engine that the command * stream is ending. */ static void radeon_do_cp_flush( drm_radeon_private_t *dev_priv ) { DRM_DEBUG( "%s\n", __FUNCTION__ ); #if 0 u32 tmp; tmp = RADEON_READ( RADEON_CP_RB_WPTR ) | (1 << 31); RADEON_WRITE( RADEON_CP_RB_WPTR, tmp ); #endif } /* Wait for the CP to go idle. */ int radeon_do_cp_idle( drm_radeon_private_t *dev_priv ) { RING_LOCALS; DRM_DEBUG( "%s\n", __FUNCTION__ ); BEGIN_RING( 6 ); RADEON_PURGE_CACHE(); RADEON_PURGE_ZCACHE(); RADEON_WAIT_UNTIL_IDLE(); ADVANCE_RING(); return radeon_do_wait_for_idle( dev_priv ); } /* Start the Command Processor. */ static void radeon_do_cp_start( drm_radeon_private_t *dev_priv ) { RING_LOCALS; DRM_DEBUG( "%s\n", __FUNCTION__ ); radeon_do_wait_for_idle( dev_priv ); RADEON_WRITE( RADEON_CP_CSQ_CNTL, dev_priv->cp_mode ); dev_priv->cp_running = 1; BEGIN_RING( 6 ); RADEON_PURGE_CACHE(); RADEON_PURGE_ZCACHE(); RADEON_WAIT_UNTIL_IDLE(); ADVANCE_RING(); } /* Reset the Command Processor. This will not flush any pending * commands, so you must wait for the CP command stream to complete * before calling this routine. */ static void radeon_do_cp_reset( drm_radeon_private_t *dev_priv ) { u32 cur_read_ptr; DRM_DEBUG( "%s\n", __FUNCTION__ ); cur_read_ptr = RADEON_READ( RADEON_CP_RB_RPTR ); RADEON_WRITE( RADEON_CP_RB_WPTR, cur_read_ptr ); *dev_priv->ring.head = cur_read_ptr; dev_priv->ring.tail = cur_read_ptr; } /* Stop the Command Processor. This will not flush any pending * commands, so you must flush the command stream and wait for the CP * to go idle before calling this routine. */ static void radeon_do_cp_stop( drm_radeon_private_t *dev_priv ) { DRM_DEBUG( "%s\n", __FUNCTION__ ); RADEON_WRITE( RADEON_CP_CSQ_CNTL, RADEON_CSQ_PRIDIS_INDDIS ); dev_priv->cp_running = 0; } /* Reset the engine. This will stop the CP if it is running. */ static int radeon_do_engine_reset( drm_device_t *dev ) { drm_radeon_private_t *dev_priv = dev->dev_private; u32 clock_cntl_index, mclk_cntl, rbbm_soft_reset; DRM_DEBUG( "%s\n", __FUNCTION__ ); radeon_do_pixcache_flush( dev_priv ); clock_cntl_index = RADEON_READ( RADEON_CLOCK_CNTL_INDEX ); mclk_cntl = RADEON_READ_PLL( dev, RADEON_MCLK_CNTL ); RADEON_WRITE_PLL( RADEON_MCLK_CNTL, ( mclk_cntl | RADEON_FORCEON_MCLKA | RADEON_FORCEON_MCLKB | RADEON_FORCEON_YCLKA | RADEON_FORCEON_YCLKB | RADEON_FORCEON_MC | RADEON_FORCEON_AIC ) ); rbbm_soft_reset = RADEON_READ( RADEON_RBBM_SOFT_RESET ); RADEON_WRITE( RADEON_RBBM_SOFT_RESET, ( rbbm_soft_reset | RADEON_SOFT_RESET_CP | RADEON_SOFT_RESET_HI | RADEON_SOFT_RESET_SE | RADEON_SOFT_RESET_RE | RADEON_SOFT_RESET_PP | RADEON_SOFT_RESET_E2 | RADEON_SOFT_RESET_RB ) ); RADEON_READ( RADEON_RBBM_SOFT_RESET ); RADEON_WRITE( RADEON_RBBM_SOFT_RESET, ( rbbm_soft_reset & ~( RADEON_SOFT_RESET_CP | RADEON_SOFT_RESET_HI | RADEON_SOFT_RESET_SE | RADEON_SOFT_RESET_RE | RADEON_SOFT_RESET_PP | RADEON_SOFT_RESET_E2 | RADEON_SOFT_RESET_RB ) ) ); RADEON_READ( RADEON_RBBM_SOFT_RESET ); RADEON_WRITE_PLL( RADEON_MCLK_CNTL, mclk_cntl ); RADEON_WRITE( RADEON_CLOCK_CNTL_INDEX, clock_cntl_index ); RADEON_WRITE( RADEON_RBBM_SOFT_RESET, rbbm_soft_reset ); /* Reset the CP ring */ radeon_do_cp_reset( dev_priv ); /* The CP is no longer running after an engine reset */ dev_priv->cp_running = 0; /* Reset any pending vertex, indirect buffers */ radeon_freelist_reset( dev ); return 0; } static void radeon_cp_init_ring_buffer( drm_device_t *dev, drm_radeon_private_t *dev_priv ) { u32 ring_start, cur_read_ptr; u32 tmp; /* Initialize the memory controller */ RADEON_WRITE( RADEON_MC_FB_LOCATION, (dev_priv->agp_vm_start - 1) & 0xffff0000 ); if ( !dev_priv->is_pci ) { RADEON_WRITE( RADEON_MC_AGP_LOCATION, (((dev_priv->agp_vm_start - 1 + dev_priv->agp_size) & 0xffff0000) | (dev_priv->agp_vm_start >> 16)) ); } #if __REALLY_HAVE_AGP if ( !dev_priv->is_pci ) ring_start = (dev_priv->cp_ring->offset - dev->agp->base + dev_priv->agp_vm_start); else #endif ring_start = (dev_priv->cp_ring->offset - dev->sg->handle + dev_priv->agp_vm_start); RADEON_WRITE( RADEON_CP_RB_BASE, ring_start ); /* Set the write pointer delay */ RADEON_WRITE( RADEON_CP_RB_WPTR_DELAY, 0 ); /* Initialize the ring buffer's read and write pointers */ cur_read_ptr = RADEON_READ( RADEON_CP_RB_RPTR ); RADEON_WRITE( RADEON_CP_RB_WPTR, cur_read_ptr ); *dev_priv->ring.head = cur_read_ptr; dev_priv->ring.tail = cur_read_ptr; if ( !dev_priv->is_pci ) { RADEON_WRITE( RADEON_CP_RB_RPTR_ADDR, dev_priv->ring_rptr->offset ); } else { drm_sg_mem_t *entry = dev->sg; unsigned long tmp_ofs, page_ofs; tmp_ofs = dev_priv->ring_rptr->offset - dev->sg->handle; page_ofs = tmp_ofs >> PAGE_SHIFT; RADEON_WRITE( RADEON_CP_RB_RPTR_ADDR, entry->busaddr[page_ofs]); DRM_DEBUG( "ring rptr: offset=0x%08x handle=0x%08lx\n", entry->busaddr[page_ofs], entry->handle + tmp_ofs ); } /* Set ring buffer size */ RADEON_WRITE( RADEON_CP_RB_CNTL, dev_priv->ring.size_l2qw ); radeon_do_wait_for_idle( dev_priv ); /* Turn on bus mastering */ tmp = RADEON_READ( RADEON_BUS_CNTL ) & ~RADEON_BUS_MASTER_DIS; RADEON_WRITE( RADEON_BUS_CNTL, tmp ); /* Sync everything up */ RADEON_WRITE( RADEON_ISYNC_CNTL, (RADEON_ISYNC_ANY2D_IDLE3D | RADEON_ISYNC_ANY3D_IDLE2D | RADEON_ISYNC_WAIT_IDLEGUI | RADEON_ISYNC_CPSCRATCH_IDLEGUI) ); } static int radeon_do_init_cp( drm_device_t *dev, drm_radeon_init_t *init ) { drm_radeon_private_t *dev_priv; struct list_head *list; u32 tmp; DRM_DEBUG( "%s\n", __FUNCTION__ ); dev_priv = DRM(alloc)( sizeof(drm_radeon_private_t), DRM_MEM_DRIVER ); if ( dev_priv == NULL ) return -ENOMEM; memset( dev_priv, 0, sizeof(drm_radeon_private_t) ); dev_priv->is_pci = init->is_pci; #if !defined(PCIGART_ENABLED) /* PCI support is not 100% working, so we disable it here. */ if ( dev_priv->is_pci ) { DRM_ERROR( "PCI GART not yet supported for Radeon!\n" ); dev->dev_private = (void *)dev_priv; radeon_do_cleanup_cp(dev); return -EINVAL; } #endif if ( dev_priv->is_pci && !dev->sg ) { DRM_ERROR( "PCI GART memory not allocated!\n" ); dev->dev_private = (void *)dev_priv; radeon_do_cleanup_cp(dev); return -EINVAL; } dev_priv->usec_timeout = init->usec_timeout; if ( dev_priv->usec_timeout < 1 || dev_priv->usec_timeout > RADEON_MAX_USEC_TIMEOUT ) { DRM_DEBUG( "TIMEOUT problem!\n" ); dev->dev_private = (void *)dev_priv; radeon_do_cleanup_cp(dev); return -EINVAL; } dev_priv->cp_mode = init->cp_mode; /* Simple idle check. */ atomic_set( &dev_priv->idle_count, 0 ); /* We don't support anything other than bus-mastering ring mode, * but the ring can be in either AGP or PCI space for the ring * read pointer. */ if ( ( init->cp_mode != RADEON_CSQ_PRIBM_INDDIS ) && ( init->cp_mode != RADEON_CSQ_PRIBM_INDBM ) ) { DRM_DEBUG( "BAD cp_mode (%x)!\n", init->cp_mode ); dev->dev_private = (void *)dev_priv; radeon_do_cleanup_cp(dev); return -EINVAL; } switch ( init->fb_bpp ) { case 16: dev_priv->color_fmt = RADEON_COLOR_FORMAT_RGB565; break; case 32: default: dev_priv->color_fmt = RADEON_COLOR_FORMAT_ARGB8888; break; } dev_priv->front_offset = init->front_offset; dev_priv->front_pitch = init->front_pitch; dev_priv->back_offset = init->back_offset; dev_priv->back_pitch = init->back_pitch; switch ( init->depth_bpp ) { case 16: dev_priv->depth_fmt = RADEON_DEPTH_FORMAT_16BIT_INT_Z; break; case 32: default: dev_priv->depth_fmt = RADEON_DEPTH_FORMAT_24BIT_INT_Z; break; } dev_priv->depth_offset = init->depth_offset; dev_priv->depth_pitch = init->depth_pitch; dev_priv->front_pitch_offset = (((dev_priv->front_pitch/64) << 22) | (dev_priv->front_offset >> 10)); dev_priv->back_pitch_offset = (((dev_priv->back_pitch/64) << 22) | (dev_priv->back_offset >> 10)); dev_priv->depth_pitch_offset = (((dev_priv->depth_pitch/64) << 22) | (dev_priv->depth_offset >> 10)); /* Hardware state for depth clears. Remove this if/when we no * longer clear the depth buffer with a 3D rectangle. Hard-code * all values to prevent unwanted 3D state from slipping through * and screwing with the clear operation. */ dev_priv->depth_clear.rb3d_cntl = (RADEON_PLANE_MASK_ENABLE | RADEON_Z_ENABLE | (dev_priv->color_fmt << 10) | RADEON_ZBLOCK16); dev_priv->depth_clear.rb3d_zstencilcntl = (dev_priv->depth_fmt | RADEON_Z_TEST_ALWAYS | RADEON_STENCIL_TEST_ALWAYS | RADEON_STENCIL_S_FAIL_KEEP | RADEON_STENCIL_ZPASS_KEEP | RADEON_STENCIL_ZFAIL_KEEP | RADEON_Z_WRITE_ENABLE); dev_priv->depth_clear.se_cntl = (RADEON_FFACE_CULL_CW | RADEON_BFACE_SOLID | RADEON_FFACE_SOLID | RADEON_FLAT_SHADE_VTX_LAST | RADEON_DIFFUSE_SHADE_FLAT | RADEON_ALPHA_SHADE_FLAT | RADEON_SPECULAR_SHADE_FLAT | RADEON_FOG_SHADE_FLAT | RADEON_VTX_PIX_CENTER_OGL | RADEON_ROUND_MODE_TRUNC | RADEON_ROUND_PREC_8TH_PIX); list_for_each(list, &dev->maplist->head) { drm_map_list_t *r_list = (drm_map_list_t *)list; if( r_list->map && r_list->map->type == _DRM_SHM && r_list->map->flags & _DRM_CONTAINS_LOCK ) { dev_priv->sarea = r_list->map; break; } } if(!dev_priv->sarea) { DRM_ERROR("could not find sarea!\n"); dev->dev_private = (void *)dev_priv; radeon_do_cleanup_cp(dev); return -EINVAL; } DRM_FIND_MAP( dev_priv->fb, init->fb_offset ); if(!dev_priv->fb) { DRM_ERROR("could not find framebuffer!\n"); dev->dev_private = (void *)dev_priv; radeon_do_cleanup_cp(dev); return -EINVAL; } DRM_FIND_MAP( dev_priv->mmio, init->mmio_offset ); if(!dev_priv->mmio) { DRM_ERROR("could not find mmio region!\n"); dev->dev_private = (void *)dev_priv; radeon_do_cleanup_cp(dev); return -EINVAL; } DRM_FIND_MAP( dev_priv->cp_ring, init->ring_offset ); if(!dev_priv->cp_ring) { DRM_ERROR("could not find cp ring region!\n"); dev->dev_private = (void *)dev_priv; radeon_do_cleanup_cp(dev); return -EINVAL; } DRM_FIND_MAP( dev_priv->ring_rptr, init->ring_rptr_offset ); if(!dev_priv->ring_rptr) { DRM_ERROR("could not find ring read pointer!\n"); dev->dev_private = (void *)dev_priv; radeon_do_cleanup_cp(dev); return -EINVAL; } DRM_FIND_MAP( dev_priv->buffers, init->buffers_offset ); if(!dev_priv->buffers) { DRM_ERROR("could not find dma buffer region!\n"); dev->dev_private = (void *)dev_priv; radeon_do_cleanup_cp(dev); return -EINVAL; } if ( !dev_priv->is_pci ) { DRM_FIND_MAP( dev_priv->agp_textures, init->agp_textures_offset ); if(!dev_priv->agp_textures) { DRM_ERROR("could not find agp texture region!\n"); dev->dev_private = (void *)dev_priv; radeon_do_cleanup_cp(dev); return -EINVAL; } } dev_priv->sarea_priv = (drm_radeon_sarea_t *)((u8 *)dev_priv->sarea->handle + init->sarea_priv_offset); if ( !dev_priv->is_pci ) { DRM_IOREMAP( dev_priv->cp_ring ); DRM_IOREMAP( dev_priv->ring_rptr ); DRM_IOREMAP( dev_priv->buffers ); if(!dev_priv->cp_ring->handle || !dev_priv->ring_rptr->handle || !dev_priv->buffers->handle) { DRM_ERROR("could not find ioremap agp regions!\n"); dev->dev_private = (void *)dev_priv; radeon_do_cleanup_cp(dev); return -EINVAL; } } else { dev_priv->cp_ring->handle = (void *)dev_priv->cp_ring->offset; dev_priv->ring_rptr->handle = (void *)dev_priv->ring_rptr->offset; dev_priv->buffers->handle = (void *)dev_priv->buffers->offset; DRM_DEBUG( "dev_priv->cp_ring->handle %p\n", dev_priv->cp_ring->handle ); DRM_DEBUG( "dev_priv->ring_rptr->handle %p\n", dev_priv->ring_rptr->handle ); DRM_DEBUG( "dev_priv->buffers->handle %p\n", dev_priv->buffers->handle ); } dev_priv->agp_size = init->agp_size; dev_priv->agp_vm_start = RADEON_READ( RADEON_CONFIG_APER_SIZE ); #if __REALLY_HAVE_AGP if ( !dev_priv->is_pci ) dev_priv->agp_buffers_offset = (dev_priv->buffers->offset - dev->agp->base + dev_priv->agp_vm_start); else #endif dev_priv->agp_buffers_offset = (dev_priv->buffers->offset - dev->sg->handle + dev_priv->agp_vm_start); DRM_DEBUG( "dev_priv->agp_size %d\n", dev_priv->agp_size ); DRM_DEBUG( "dev_priv->agp_vm_start 0x%x\n", dev_priv->agp_vm_start ); DRM_DEBUG( "dev_priv->agp_buffers_offset 0x%lx\n", dev_priv->agp_buffers_offset ); dev_priv->ring.head = ((__volatile__ u32 *) dev_priv->ring_rptr->handle); dev_priv->ring.start = (u32 *)dev_priv->cp_ring->handle; dev_priv->ring.end = ((u32 *)dev_priv->cp_ring->handle + init->ring_size / sizeof(u32)); dev_priv->ring.size = init->ring_size; dev_priv->ring.size_l2qw = DRM(order)( init->ring_size / 8 ); dev_priv->ring.tail_mask = (dev_priv->ring.size / sizeof(u32)) - 1; dev_priv->ring.high_mark = RADEON_RING_HIGH_MARK; #if 0 /* Initialize the scratch register pointer. This will cause * the scratch register values to be written out to memory * whenever they are updated. * FIXME: This doesn't quite work yet, so we're disabling it * for the release. */ RADEON_WRITE( RADEON_SCRATCH_ADDR, (dev_priv->ring_rptr->offset + RADEON_SCRATCH_REG_OFFSET) ); RADEON_WRITE( RADEON_SCRATCH_UMSK, 0x7 ); #endif dev_priv->scratch = ((__volatile__ u32 *) dev_priv->ring_rptr->handle + (RADEON_SCRATCH_REG_OFFSET / sizeof(u32))); dev_priv->sarea_priv->last_frame = 0; RADEON_WRITE( RADEON_LAST_FRAME_REG, dev_priv->sarea_priv->last_frame ); dev_priv->sarea_priv->last_dispatch = 0; RADEON_WRITE( RADEON_LAST_DISPATCH_REG, dev_priv->sarea_priv->last_dispatch ); dev_priv->sarea_priv->last_clear = 0; RADEON_WRITE( RADEON_LAST_CLEAR_REG, dev_priv->sarea_priv->last_clear ); if ( dev_priv->is_pci ) { if (!DRM(ati_pcigart_init)( dev, &dev_priv->phys_pci_gart, &dev_priv->bus_pci_gart)) { DRM_ERROR( "failed to init PCI GART!\n" ); dev->dev_private = (void *)dev_priv; radeon_do_cleanup_cp(dev); return -ENOMEM; } /* Turn on PCI GART */ tmp = RADEON_READ( RADEON_AIC_CNTL ) | RADEON_PCIGART_TRANSLATE_EN; RADEON_WRITE( RADEON_AIC_CNTL, tmp ); /* set PCI GART page-table base address */ RADEON_WRITE( RADEON_AIC_PT_BASE, dev_priv->bus_pci_gart ); /* set address range for PCI address translate */ RADEON_WRITE( RADEON_AIC_LO_ADDR, dev_priv->agp_vm_start ); RADEON_WRITE( RADEON_AIC_HI_ADDR, dev_priv->agp_vm_start + dev_priv->agp_size - 1); /* Turn off AGP aperture -- is this required for PCIGART? */ RADEON_WRITE( RADEON_MC_AGP_LOCATION, 0xffffffc0 ); /* ?? */ RADEON_WRITE( RADEON_AGP_COMMAND, 0 ); /* clear AGP_COMMAND */ } else { /* Turn off PCI GART */ tmp = RADEON_READ( RADEON_AIC_CNTL ) & ~RADEON_PCIGART_TRANSLATE_EN; RADEON_WRITE( RADEON_AIC_CNTL, tmp ); } radeon_cp_load_microcode( dev_priv ); radeon_cp_init_ring_buffer( dev, dev_priv ); #if ROTATE_BUFS dev_priv->last_buf = 0; #endif dev->dev_private = (void *)dev_priv; radeon_do_engine_reset( dev ); return 0; } int radeon_do_cleanup_cp( drm_device_t *dev ) { DRM_DEBUG( "%s\n", __FUNCTION__ ); if ( dev->dev_private ) { drm_radeon_private_t *dev_priv = dev->dev_private; if ( !dev_priv->is_pci ) { DRM_IOREMAPFREE( dev_priv->cp_ring ); DRM_IOREMAPFREE( dev_priv->ring_rptr ); DRM_IOREMAPFREE( dev_priv->buffers ); } else { if (!DRM(ati_pcigart_cleanup)( dev, dev_priv->phys_pci_gart, dev_priv->bus_pci_gart )) DRM_ERROR( "failed to cleanup PCI GART!\n" ); } DRM(free)( dev->dev_private, sizeof(drm_radeon_private_t), DRM_MEM_DRIVER ); dev->dev_private = NULL; } return 0; } int radeon_cp_init( struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg ) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; drm_radeon_init_t init; if ( copy_from_user( &init, (drm_radeon_init_t *)arg, sizeof(init) ) ) return -EFAULT; switch ( init.func ) { case RADEON_INIT_CP: return radeon_do_init_cp( dev, &init ); case RADEON_CLEANUP_CP: return radeon_do_cleanup_cp( dev ); } return -EINVAL; } int radeon_cp_start( struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg ) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; drm_radeon_private_t *dev_priv = dev->dev_private; DRM_DEBUG( "%s\n", __FUNCTION__ ); LOCK_TEST_WITH_RETURN( dev ); if ( dev_priv->cp_running ) { DRM_DEBUG( "%s while CP running\n", __FUNCTION__ ); return 0; } if ( dev_priv->cp_mode == RADEON_CSQ_PRIDIS_INDDIS ) { DRM_DEBUG( "%s called with bogus CP mode (%d)\n", __FUNCTION__, dev_priv->cp_mode ); return 0; } radeon_do_cp_start( dev_priv ); return 0; } /* Stop the CP. The engine must have been idled before calling this * routine. */ int radeon_cp_stop( struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg ) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; drm_radeon_private_t *dev_priv = dev->dev_private; drm_radeon_cp_stop_t stop; int ret; DRM_DEBUG( "%s\n", __FUNCTION__ ); LOCK_TEST_WITH_RETURN( dev ); if ( copy_from_user( &stop, (drm_radeon_init_t *)arg, sizeof(stop) ) ) return -EFAULT; /* Flush any pending CP commands. This ensures any outstanding * commands are exectuted by the engine before we turn it off. */ if ( stop.flush ) { radeon_do_cp_flush( dev_priv ); } /* If we fail to make the engine go idle, we return an error * code so that the DRM ioctl wrapper can try again. */ if ( stop.idle ) { ret = radeon_do_cp_idle( dev_priv ); if ( ret < 0 ) return ret; } /* Finally, we can turn off the CP. If the engine isn't idle, * we will get some dropped triangles as they won't be fully * rendered before the CP is shut down. */ radeon_do_cp_stop( dev_priv ); /* Reset the engine */ radeon_do_engine_reset( dev ); return 0; } /* Just reset the CP ring. Called as part of an X Server engine reset. */ int radeon_cp_reset( struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg ) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; drm_radeon_private_t *dev_priv = dev->dev_private; DRM_DEBUG( "%s\n", __FUNCTION__ ); LOCK_TEST_WITH_RETURN( dev ); if ( !dev_priv ) { DRM_DEBUG( "%s called before init done\n", __FUNCTION__ ); return -EINVAL; } radeon_do_cp_reset( dev_priv ); /* The CP is no longer running after an engine reset */ dev_priv->cp_running = 0; return 0; } int radeon_cp_idle( struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg ) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; drm_radeon_private_t *dev_priv = dev->dev_private; DRM_DEBUG( "%s\n", __FUNCTION__ ); LOCK_TEST_WITH_RETURN( dev ); return radeon_do_cp_idle( dev_priv ); } int radeon_engine_reset( struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg ) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; DRM_DEBUG( "%s\n", __FUNCTION__ ); LOCK_TEST_WITH_RETURN( dev ); return radeon_do_engine_reset( dev ); } /* ================================================================ * Fullscreen mode */ static int radeon_do_init_pageflip( drm_device_t *dev ) { drm_radeon_private_t *dev_priv = dev->dev_private; DRM_DEBUG( "%s\n", __FUNCTION__ ); dev_priv->crtc_offset = RADEON_READ( RADEON_CRTC_OFFSET ); dev_priv->crtc_offset_cntl = RADEON_READ( RADEON_CRTC_OFFSET_CNTL ); RADEON_WRITE( RADEON_CRTC_OFFSET, dev_priv->front_offset ); RADEON_WRITE( RADEON_CRTC_OFFSET_CNTL, dev_priv->crtc_offset_cntl | RADEON_CRTC_OFFSET_FLIP_CNTL ); dev_priv->page_flipping = 1; dev_priv->current_page = 0; return 0; } int radeon_do_cleanup_pageflip( drm_device_t *dev ) { drm_radeon_private_t *dev_priv = dev->dev_private; DRM_DEBUG( "%s\n", __FUNCTION__ ); RADEON_WRITE( RADEON_CRTC_OFFSET, dev_priv->crtc_offset ); RADEON_WRITE( RADEON_CRTC_OFFSET_CNTL, dev_priv->crtc_offset_cntl ); dev_priv->page_flipping = 0; dev_priv->current_page = 0; return 0; } int radeon_fullscreen( struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg ) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; drm_radeon_fullscreen_t fs; LOCK_TEST_WITH_RETURN( dev ); if ( copy_from_user( &fs, (drm_radeon_fullscreen_t *)arg, sizeof(fs) ) ) return -EFAULT; switch ( fs.func ) { case RADEON_INIT_FULLSCREEN: return radeon_do_init_pageflip( dev ); case RADEON_CLEANUP_FULLSCREEN: return radeon_do_cleanup_pageflip( dev ); } return -EINVAL; } /* ================================================================ * Freelist management */ #define RADEON_BUFFER_USED 0xffffffff #define RADEON_BUFFER_FREE 0 #if 0 static int radeon_freelist_init( drm_device_t *dev ) { drm_device_dma_t *dma = dev->dma; drm_radeon_private_t *dev_priv = dev->dev_private; drm_buf_t *buf; drm_radeon_buf_priv_t *buf_priv; drm_radeon_freelist_t *entry; int i; dev_priv->head = DRM(alloc)( sizeof(drm_radeon_freelist_t), DRM_MEM_DRIVER ); if ( dev_priv->head == NULL ) return -ENOMEM; memset( dev_priv->head, 0, sizeof(drm_radeon_freelist_t) ); dev_priv->head->age = RADEON_BUFFER_USED; for ( i = 0 ; i < dma->buf_count ; i++ ) { buf = dma->buflist[i]; buf_priv = buf->dev_private; entry = DRM(alloc)( sizeof(drm_radeon_freelist_t), DRM_MEM_DRIVER ); if ( !entry ) return -ENOMEM; entry->age = RADEON_BUFFER_FREE; entry->buf = buf; entry->prev = dev_priv->head; entry->next = dev_priv->head->next; if ( !entry->next ) dev_priv->tail = entry; buf_priv->discard = 0; buf_priv->dispatched = 0; buf_priv->list_entry = entry; dev_priv->head->next = entry; if ( dev_priv->head->next ) dev_priv->head->next->prev = entry; } return 0; } #endif drm_buf_t *radeon_freelist_get( drm_device_t *dev ) { drm_device_dma_t *dma = dev->dma; drm_radeon_private_t *dev_priv = dev->dev_private; drm_radeon_buf_priv_t *buf_priv; drm_buf_t *buf; int i, t; #if ROTATE_BUFS int start; #endif /* FIXME: Optimize -- use freelist code */ for ( i = 0 ; i < dma->buf_count ; i++ ) { buf = dma->buflist[i]; buf_priv = buf->dev_private; if ( buf->pid == 0 ) { DRM_DEBUG( " ret buf=%d last=%d pid=0\n", buf->idx, dev_priv->last_buf ); return buf; } DRM_DEBUG( " skipping buf=%d pid=%d\n", buf->idx, buf->pid ); } #if ROTATE_BUFS if ( ++dev_priv->last_buf >= dma->buf_count ) dev_priv->last_buf = 0; start = dev_priv->last_buf; #endif for ( t = 0 ; t < dev_priv->usec_timeout ; t++ ) { #if 0 /* FIXME: Disable this for now */ u32 done_age = dev_priv->scratch[RADEON_LAST_DISPATCH]; #else u32 done_age = RADEON_READ( RADEON_LAST_DISPATCH_REG ); #endif #if ROTATE_BUFS for ( i = start ; i < dma->buf_count ; i++ ) { #else for ( i = 0 ; i < dma->buf_count ; i++ ) { #endif buf = dma->buflist[i]; buf_priv = buf->dev_private; if ( buf->pending && buf_priv->age <= done_age ) { /* The buffer has been processed, so it * can now be used. */ buf->pending = 0; DRM_DEBUG( " ret buf=%d last=%d age=%d done=%d\n", buf->idx, dev_priv->last_buf, buf_priv->age, done_age ); return buf; } DRM_DEBUG( " skipping buf=%d age=%d done=%d\n", buf->idx, buf_priv->age, done_age ); #if ROTATE_BUFS start = 0; #endif } udelay( 1 ); } DRM_ERROR( "returning NULL!\n" ); return NULL; } void radeon_freelist_reset( drm_device_t *dev ) { drm_device_dma_t *dma = dev->dma; #if ROTATE_BUFS drm_radeon_private_t *dev_priv = dev->dev_private; #endif int i; #if ROTATE_BUFS dev_priv->last_buf = 0; #endif for ( i = 0 ; i < dma->buf_count ; i++ ) { drm_buf_t *buf = dma->buflist[i]; drm_radeon_buf_priv_t *buf_priv = buf->dev_private; buf_priv->age = 0; } } /* ================================================================ * CP command submission */ int radeon_wait_ring( drm_radeon_private_t *dev_priv, int n ) { drm_radeon_ring_buffer_t *ring = &dev_priv->ring; int i; for ( i = 0 ; i < dev_priv->usec_timeout ; i++ ) { radeon_update_ring_snapshot( ring ); if ( ring->space > n ) return 0; udelay( 1 ); } /* FIXME: This return value is ignored in the BEGIN_RING macro! */ #if RADEON_FIFO_DEBUG radeon_status( dev_priv ); DRM_ERROR( "failed!\n" ); #endif return -EBUSY; } static int radeon_cp_get_buffers( drm_device_t *dev, drm_dma_t *d ) { int i; drm_buf_t *buf; for ( i = d->granted_count ; i < d->request_count ; i++ ) { buf = radeon_freelist_get( dev ); if ( !buf ) return -EAGAIN; buf->pid = current->pid; if ( copy_to_user( &d->request_indices[i], &buf->idx, sizeof(buf->idx) ) ) return -EFAULT; if ( copy_to_user( &d->request_sizes[i], &buf->total, sizeof(buf->total) ) ) return -EFAULT; d->granted_count++; } return 0; } int radeon_cp_buffers( struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg ) { drm_file_t *priv = filp->private_data; drm_device_t *dev = priv->dev; drm_device_dma_t *dma = dev->dma; int ret = 0; drm_dma_t d; LOCK_TEST_WITH_RETURN( dev ); if ( copy_from_user( &d, (drm_dma_t *)arg, sizeof(d) ) ) return -EFAULT; /* Please don't send us buffers. */ if ( d.send_count != 0 ) { DRM_ERROR( "Process %d trying to send %d buffers via drmDMA\n", current->pid, d.send_count ); return -EINVAL; } /* We'll send you buffers. */ if ( d.request_count < 0 || d.request_count > dma->buf_count ) { DRM_ERROR( "Process %d trying to get %d buffers (of %d max)\n", current->pid, d.request_count, dma->buf_count ); return -EINVAL; } d.granted_count = 0; if ( d.request_count ) { ret = radeon_cp_get_buffers( dev, &d ); } if ( copy_to_user( (drm_dma_t *)arg, &d, sizeof(d) ) ) return -EFAULT; return ret; }