diff options
Diffstat (limited to 'drivers/gpu/drm/via/via_dma.c')
| -rw-r--r-- | drivers/gpu/drm/via/via_dma.c | 744 |
1 files changed, 0 insertions, 744 deletions
diff --git a/drivers/gpu/drm/via/via_dma.c b/drivers/gpu/drm/via/via_dma.c deleted file mode 100644 index 177b0499abf1..000000000000 --- a/drivers/gpu/drm/via/via_dma.c +++ /dev/null @@ -1,744 +0,0 @@ -/* via_dma.c -- DMA support for the VIA Unichrome/Pro - * - * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. - * All Rights Reserved. - * - * Copyright 2004 Digeo, Inc., Palo Alto, CA, U.S.A. - * All Rights Reserved. - * - * Copyright 2004 The Unichrome project. - * 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, sub license, - * 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 NON-INFRINGEMENT. IN NO EVENT SHALL - * THE COPYRIGHT HOLDERS, AUTHORS 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: - * Tungsten Graphics, - * Erdi Chen, - * Thomas Hellstrom. - */ - -#include <linux/delay.h> -#include <linux/uaccess.h> - -#include <drm/drm.h> -#include <drm/drm_device.h> -#include <drm/drm_file.h> -#include <drm/via_drm.h> - -#include "via_drv.h" -#include "via_3d_reg.h" - -#define CMDBUF_ALIGNMENT_SIZE (0x100) -#define CMDBUF_ALIGNMENT_MASK (0x0ff) - -/* defines for VIA 3D registers */ -#define VIA_REG_STATUS 0x400 -#define VIA_REG_TRANSET 0x43C -#define VIA_REG_TRANSPACE 0x440 - -/* VIA_REG_STATUS(0x400): Engine Status */ -#define VIA_CMD_RGTR_BUSY 0x00000080 /* Command Regulator is busy */ -#define VIA_2D_ENG_BUSY 0x00000001 /* 2D Engine is busy */ -#define VIA_3D_ENG_BUSY 0x00000002 /* 3D Engine is busy */ -#define VIA_VR_QUEUE_BUSY 0x00020000 /* Virtual Queue is busy */ - -#define SetReg2DAGP(nReg, nData) { \ - *((uint32_t *)(vb)) = ((nReg) >> 2) | HALCYON_HEADER1; \ - *((uint32_t *)(vb) + 1) = (nData); \ - vb = ((uint32_t *)vb) + 2; \ - dev_priv->dma_low += 8; \ -} - -#define via_flush_write_combine() mb() - -#define VIA_OUT_RING_QW(w1, w2) do { \ - *vb++ = (w1); \ - *vb++ = (w2); \ - dev_priv->dma_low += 8; \ -} while (0) - -static void via_cmdbuf_start(drm_via_private_t *dev_priv); -static void via_cmdbuf_pause(drm_via_private_t *dev_priv); -static void via_cmdbuf_reset(drm_via_private_t *dev_priv); -static void via_cmdbuf_rewind(drm_via_private_t *dev_priv); -static int via_wait_idle(drm_via_private_t *dev_priv); -static void via_pad_cache(drm_via_private_t *dev_priv, int qwords); - -/* - * Free space in command buffer. - */ - -static uint32_t via_cmdbuf_space(drm_via_private_t *dev_priv) -{ - uint32_t agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr; - uint32_t hw_addr = *(dev_priv->hw_addr_ptr) - agp_base; - - return ((hw_addr <= dev_priv->dma_low) ? - (dev_priv->dma_high + hw_addr - dev_priv->dma_low) : - (hw_addr - dev_priv->dma_low)); -} - -/* - * How much does the command regulator lag behind? - */ - -static uint32_t via_cmdbuf_lag(drm_via_private_t *dev_priv) -{ - uint32_t agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr; - uint32_t hw_addr = *(dev_priv->hw_addr_ptr) - agp_base; - - return ((hw_addr <= dev_priv->dma_low) ? - (dev_priv->dma_low - hw_addr) : - (dev_priv->dma_wrap + dev_priv->dma_low - hw_addr)); -} - -/* - * Check that the given size fits in the buffer, otherwise wait. - */ - -static inline int -via_cmdbuf_wait(drm_via_private_t *dev_priv, unsigned int size) -{ - uint32_t agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr; - uint32_t cur_addr, hw_addr, next_addr; - volatile uint32_t *hw_addr_ptr; - uint32_t count; - hw_addr_ptr = dev_priv->hw_addr_ptr; - cur_addr = dev_priv->dma_low; - next_addr = cur_addr + size + 512 * 1024; - count = 1000000; - do { - hw_addr = *hw_addr_ptr - agp_base; - if (count-- == 0) { - DRM_ERROR - ("via_cmdbuf_wait timed out hw %x cur_addr %x next_addr %x\n", - hw_addr, cur_addr, next_addr); - return -1; - } - if ((cur_addr < hw_addr) && (next_addr >= hw_addr)) - msleep(1); - } while ((cur_addr < hw_addr) && (next_addr >= hw_addr)); - return 0; -} - -/* - * Checks whether buffer head has reach the end. Rewind the ring buffer - * when necessary. - * - * Returns virtual pointer to ring buffer. - */ - -static inline uint32_t *via_check_dma(drm_via_private_t * dev_priv, - unsigned int size) -{ - if ((dev_priv->dma_low + size + 4 * CMDBUF_ALIGNMENT_SIZE) > - dev_priv->dma_high) { - via_cmdbuf_rewind(dev_priv); - } - if (via_cmdbuf_wait(dev_priv, size) != 0) - return NULL; - - return (uint32_t *) (dev_priv->dma_ptr + dev_priv->dma_low); -} - -int via_dma_cleanup(struct drm_device *dev) -{ - if (dev->dev_private) { - drm_via_private_t *dev_priv = - (drm_via_private_t *) dev->dev_private; - - if (dev_priv->ring.virtual_start) { - via_cmdbuf_reset(dev_priv); - - drm_legacy_ioremapfree(&dev_priv->ring.map, dev); - dev_priv->ring.virtual_start = NULL; - } - - } - - return 0; -} - -static int via_initialize(struct drm_device *dev, - drm_via_private_t *dev_priv, - drm_via_dma_init_t *init) -{ - if (!dev_priv || !dev_priv->mmio) { - DRM_ERROR("via_dma_init called before via_map_init\n"); - return -EFAULT; - } - - if (dev_priv->ring.virtual_start != NULL) { - DRM_ERROR("called again without calling cleanup\n"); - return -EFAULT; - } - - if (!dev->agp || !dev->agp->base) { - DRM_ERROR("called with no agp memory available\n"); - return -EFAULT; - } - - if (dev_priv->chipset == VIA_DX9_0) { - DRM_ERROR("AGP DMA is not supported on this chip\n"); - return -EINVAL; - } - - dev_priv->ring.map.offset = dev->agp->base + init->offset; - dev_priv->ring.map.size = init->size; - dev_priv->ring.map.type = 0; - dev_priv->ring.map.flags = 0; - dev_priv->ring.map.mtrr = 0; - - drm_legacy_ioremap(&dev_priv->ring.map, dev); - - if (dev_priv->ring.map.handle == NULL) { - via_dma_cleanup(dev); - DRM_ERROR("can not ioremap virtual address for" - " ring buffer\n"); - return -ENOMEM; - } - - dev_priv->ring.virtual_start = dev_priv->ring.map.handle; - - dev_priv->dma_ptr = dev_priv->ring.virtual_start; - dev_priv->dma_low = 0; - dev_priv->dma_high = init->size; - dev_priv->dma_wrap = init->size; - dev_priv->dma_offset = init->offset; - dev_priv->last_pause_ptr = NULL; - dev_priv->hw_addr_ptr = - (volatile uint32_t *)((char *)dev_priv->mmio->handle + - init->reg_pause_addr); - - via_cmdbuf_start(dev_priv); - - return 0; -} - -static int via_dma_init(struct drm_device *dev, void *data, struct drm_file *file_priv) -{ - drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private; - drm_via_dma_init_t *init = data; - int retcode = 0; - - switch (init->func) { - case VIA_INIT_DMA: - if (!capable(CAP_SYS_ADMIN)) - retcode = -EPERM; - else - retcode = via_initialize(dev, dev_priv, init); - break; - case VIA_CLEANUP_DMA: - if (!capable(CAP_SYS_ADMIN)) - retcode = -EPERM; - else - retcode = via_dma_cleanup(dev); - break; - case VIA_DMA_INITIALIZED: - retcode = (dev_priv->ring.virtual_start != NULL) ? - 0 : -EFAULT; - break; - default: - retcode = -EINVAL; - break; - } - - return retcode; -} - -static int via_dispatch_cmdbuffer(struct drm_device *dev, drm_via_cmdbuffer_t *cmd) -{ - drm_via_private_t *dev_priv; - uint32_t *vb; - int ret; - - dev_priv = (drm_via_private_t *) dev->dev_private; - - if (dev_priv->ring.virtual_start == NULL) { - DRM_ERROR("called without initializing AGP ring buffer.\n"); - return -EFAULT; - } - - if (cmd->size > VIA_PCI_BUF_SIZE) - return -ENOMEM; - - if (copy_from_user(dev_priv->pci_buf, cmd->buf, cmd->size)) - return -EFAULT; - - /* - * Running this function on AGP memory is dead slow. Therefore - * we run it on a temporary cacheable system memory buffer and - * copy it to AGP memory when ready. - */ - - if ((ret = - via_verify_command_stream((uint32_t *) dev_priv->pci_buf, - cmd->size, dev, 1))) { - return ret; - } - - vb = via_check_dma(dev_priv, (cmd->size < 0x100) ? 0x102 : cmd->size); - if (vb == NULL) - return -EAGAIN; - - memcpy(vb, dev_priv->pci_buf, cmd->size); - - dev_priv->dma_low += cmd->size; - - /* - * Small submissions somehow stalls the CPU. (AGP cache effects?) - * pad to greater size. - */ - - if (cmd->size < 0x100) - via_pad_cache(dev_priv, (0x100 - cmd->size) >> 3); - via_cmdbuf_pause(dev_priv); - - return 0; -} - -int via_driver_dma_quiescent(struct drm_device *dev) -{ - drm_via_private_t *dev_priv = dev->dev_private; - - if (!via_wait_idle(dev_priv)) - return -EBUSY; - return 0; -} - -static int via_flush_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) -{ - - LOCK_TEST_WITH_RETURN(dev, file_priv); - - return via_driver_dma_quiescent(dev); -} - -static int via_cmdbuffer(struct drm_device *dev, void *data, struct drm_file *file_priv) -{ - drm_via_cmdbuffer_t *cmdbuf = data; - int ret; - - LOCK_TEST_WITH_RETURN(dev, file_priv); - - DRM_DEBUG("buf %p size %lu\n", cmdbuf->buf, cmdbuf->size); - - ret = via_dispatch_cmdbuffer(dev, cmdbuf); - return ret; -} - -static int via_dispatch_pci_cmdbuffer(struct drm_device *dev, - drm_via_cmdbuffer_t *cmd) -{ - drm_via_private_t *dev_priv = dev->dev_private; - int ret; - - if (cmd->size > VIA_PCI_BUF_SIZE) - return -ENOMEM; - if (copy_from_user(dev_priv->pci_buf, cmd->buf, cmd->size)) - return -EFAULT; - - if ((ret = - via_verify_command_stream((uint32_t *) dev_priv->pci_buf, - cmd->size, dev, 0))) { - return ret; - } - - ret = - via_parse_command_stream(dev, (const uint32_t *)dev_priv->pci_buf, - cmd->size); - return ret; -} - -static int via_pci_cmdbuffer(struct drm_device *dev, void *data, struct drm_file *file_priv) -{ - drm_via_cmdbuffer_t *cmdbuf = data; - int ret; - - LOCK_TEST_WITH_RETURN(dev, file_priv); - - DRM_DEBUG("buf %p size %lu\n", cmdbuf->buf, cmdbuf->size); - - ret = via_dispatch_pci_cmdbuffer(dev, cmdbuf); - return ret; -} - -static inline uint32_t *via_align_buffer(drm_via_private_t *dev_priv, - uint32_t * vb, int qw_count) -{ - for (; qw_count > 0; --qw_count) - VIA_OUT_RING_QW(HC_DUMMY, HC_DUMMY); - return vb; -} - -/* - * This function is used internally by ring buffer management code. - * - * Returns virtual pointer to ring buffer. - */ -static inline uint32_t *via_get_dma(drm_via_private_t *dev_priv) -{ - return (uint32_t *) (dev_priv->dma_ptr + dev_priv->dma_low); -} - -/* - * Hooks a segment of data into the tail of the ring-buffer by - * modifying the pause address stored in the buffer itself. If - * the regulator has already paused, restart it. - */ -static int via_hook_segment(drm_via_private_t *dev_priv, - uint32_t pause_addr_hi, uint32_t pause_addr_lo, - int no_pci_fire) -{ - int paused, count; - volatile uint32_t *paused_at = dev_priv->last_pause_ptr; - uint32_t reader, ptr; - uint32_t diff; - - paused = 0; - via_flush_write_combine(); - (void) *(volatile uint32_t *)(via_get_dma(dev_priv) - 1); - - *paused_at = pause_addr_lo; - via_flush_write_combine(); - (void) *paused_at; - - reader = *(dev_priv->hw_addr_ptr); - ptr = ((volatile char *)paused_at - dev_priv->dma_ptr) + - dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr + 4; - - dev_priv->last_pause_ptr = via_get_dma(dev_priv) - 1; - - /* - * If there is a possibility that the command reader will - * miss the new pause address and pause on the old one, - * In that case we need to program the new start address - * using PCI. - */ - - diff = (uint32_t) (ptr - reader) - dev_priv->dma_diff; - count = 10000000; - while (diff == 0 && count--) { - paused = (via_read(dev_priv, 0x41c) & 0x80000000); - if (paused) - break; - reader = *(dev_priv->hw_addr_ptr); - diff = (uint32_t) (ptr - reader) - dev_priv->dma_diff; - } - - paused = via_read(dev_priv, 0x41c) & 0x80000000; - - if (paused && !no_pci_fire) { - reader = *(dev_priv->hw_addr_ptr); - diff = (uint32_t) (ptr - reader) - dev_priv->dma_diff; - diff &= (dev_priv->dma_high - 1); - if (diff != 0 && diff < (dev_priv->dma_high >> 1)) { - DRM_ERROR("Paused at incorrect address. " - "0x%08x, 0x%08x 0x%08x\n", - ptr, reader, dev_priv->dma_diff); - } else if (diff == 0) { - /* - * There is a concern that these writes may stall the PCI bus - * if the GPU is not idle. However, idling the GPU first - * doesn't make a difference. - */ - - via_write(dev_priv, VIA_REG_TRANSET, (HC_ParaType_PreCR << 16)); - via_write(dev_priv, VIA_REG_TRANSPACE, pause_addr_hi); - via_write(dev_priv, VIA_REG_TRANSPACE, pause_addr_lo); - via_read(dev_priv, VIA_REG_TRANSPACE); - } - } - return paused; -} - -static int via_wait_idle(drm_via_private_t *dev_priv) -{ - int count = 10000000; - - while (!(via_read(dev_priv, VIA_REG_STATUS) & VIA_VR_QUEUE_BUSY) && --count) - ; - - while (count && (via_read(dev_priv, VIA_REG_STATUS) & - (VIA_CMD_RGTR_BUSY | VIA_2D_ENG_BUSY | - VIA_3D_ENG_BUSY))) - --count; - return count; -} - -static uint32_t *via_align_cmd(drm_via_private_t *dev_priv, uint32_t cmd_type, - uint32_t addr, uint32_t *cmd_addr_hi, - uint32_t *cmd_addr_lo, int skip_wait) -{ - uint32_t agp_base; - uint32_t cmd_addr, addr_lo, addr_hi; - uint32_t *vb; - uint32_t qw_pad_count; - - if (!skip_wait) - via_cmdbuf_wait(dev_priv, 2 * CMDBUF_ALIGNMENT_SIZE); - - vb = via_get_dma(dev_priv); - VIA_OUT_RING_QW(HC_HEADER2 | ((VIA_REG_TRANSET >> 2) << 12) | - (VIA_REG_TRANSPACE >> 2), HC_ParaType_PreCR << 16); - agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr; - qw_pad_count = (CMDBUF_ALIGNMENT_SIZE >> 3) - - ((dev_priv->dma_low & CMDBUF_ALIGNMENT_MASK) >> 3); - - cmd_addr = (addr) ? addr : - agp_base + dev_priv->dma_low - 8 + (qw_pad_count << 3); - addr_lo = ((HC_SubA_HAGPBpL << 24) | (cmd_type & HC_HAGPBpID_MASK) | - (cmd_addr & HC_HAGPBpL_MASK)); - addr_hi = ((HC_SubA_HAGPBpH << 24) | (cmd_addr >> 24)); - - vb = via_align_buffer(dev_priv, vb, qw_pad_count - 1); - VIA_OUT_RING_QW(*cmd_addr_hi = addr_hi, *cmd_addr_lo = addr_lo); - return vb; -} - -static void via_cmdbuf_start(drm_via_private_t *dev_priv) -{ - uint32_t pause_addr_lo, pause_addr_hi; - uint32_t start_addr, start_addr_lo; - uint32_t end_addr, end_addr_lo; - uint32_t command; - uint32_t agp_base; - uint32_t ptr; - uint32_t reader; - int count; - - dev_priv->dma_low = 0; - - agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr; - start_addr = agp_base; - end_addr = agp_base + dev_priv->dma_high; - - start_addr_lo = ((HC_SubA_HAGPBstL << 24) | (start_addr & 0xFFFFFF)); - end_addr_lo = ((HC_SubA_HAGPBendL << 24) | (end_addr & 0xFFFFFF)); - command = ((HC_SubA_HAGPCMNT << 24) | (start_addr >> 24) | - ((end_addr & 0xff000000) >> 16)); - - dev_priv->last_pause_ptr = - via_align_cmd(dev_priv, HC_HAGPBpID_PAUSE, 0, - &pause_addr_hi, &pause_addr_lo, 1) - 1; - - via_flush_write_combine(); - (void) *(volatile uint32_t *)dev_priv->last_pause_ptr; - - via_write(dev_priv, VIA_REG_TRANSET, (HC_ParaType_PreCR << 16)); - via_write(dev_priv, VIA_REG_TRANSPACE, command); - via_write(dev_priv, VIA_REG_TRANSPACE, start_addr_lo); - via_write(dev_priv, VIA_REG_TRANSPACE, end_addr_lo); - - via_write(dev_priv, VIA_REG_TRANSPACE, pause_addr_hi); - via_write(dev_priv, VIA_REG_TRANSPACE, pause_addr_lo); - wmb(); - via_write(dev_priv, VIA_REG_TRANSPACE, command | HC_HAGPCMNT_MASK); - via_read(dev_priv, VIA_REG_TRANSPACE); - - dev_priv->dma_diff = 0; - - count = 10000000; - while (!(via_read(dev_priv, 0x41c) & 0x80000000) && count--); - - reader = *(dev_priv->hw_addr_ptr); - ptr = ((volatile char *)dev_priv->last_pause_ptr - dev_priv->dma_ptr) + - dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr + 4; - - /* - * This is the difference between where we tell the - * command reader to pause and where it actually pauses. - * This differs between hw implementation so we need to - * detect it. - */ - - dev_priv->dma_diff = ptr - reader; -} - -static void via_pad_cache(drm_via_private_t *dev_priv, int qwords) -{ - uint32_t *vb; - - via_cmdbuf_wait(dev_priv, qwords + 2); - vb = via_get_dma(dev_priv); - VIA_OUT_RING_QW(HC_HEADER2, HC_ParaType_NotTex << 16); - via_align_buffer(dev_priv, vb, qwords); -} - -static inline void via_dummy_bitblt(drm_via_private_t *dev_priv) -{ - uint32_t *vb = via_get_dma(dev_priv); - SetReg2DAGP(0x0C, (0 | (0 << 16))); - SetReg2DAGP(0x10, 0 | (0 << 16)); - SetReg2DAGP(0x0, 0x1 | 0x2000 | 0xAA000000); -} - -static void via_cmdbuf_jump(drm_via_private_t *dev_priv) -{ - uint32_t pause_addr_lo, pause_addr_hi; - uint32_t jump_addr_lo, jump_addr_hi; - volatile uint32_t *last_pause_ptr; - uint32_t dma_low_save1, dma_low_save2; - - via_align_cmd(dev_priv, HC_HAGPBpID_JUMP, 0, &jump_addr_hi, - &jump_addr_lo, 0); - - dev_priv->dma_wrap = dev_priv->dma_low; - - /* - * Wrap command buffer to the beginning. - */ - - dev_priv->dma_low = 0; - if (via_cmdbuf_wait(dev_priv, CMDBUF_ALIGNMENT_SIZE) != 0) - DRM_ERROR("via_cmdbuf_jump failed\n"); - - via_dummy_bitblt(dev_priv); - via_dummy_bitblt(dev_priv); - - last_pause_ptr = - via_align_cmd(dev_priv, HC_HAGPBpID_PAUSE, 0, &pause_addr_hi, - &pause_addr_lo, 0) - 1; - via_align_cmd(dev_priv, HC_HAGPBpID_PAUSE, 0, &pause_addr_hi, - &pause_addr_lo, 0); - - *last_pause_ptr = pause_addr_lo; - dma_low_save1 = dev_priv->dma_low; - - /* - * Now, set a trap that will pause the regulator if it tries to rerun the old - * command buffer. (Which may happen if via_hook_segment detecs a command regulator pause - * and reissues the jump command over PCI, while the regulator has already taken the jump - * and actually paused at the current buffer end). - * There appears to be no other way to detect this condition, since the hw_addr_pointer - * does not seem to get updated immediately when a jump occurs. - */ - - last_pause_ptr = - via_align_cmd(dev_priv, HC_HAGPBpID_PAUSE, 0, &pause_addr_hi, - &pause_addr_lo, 0) - 1; - via_align_cmd(dev_priv, HC_HAGPBpID_PAUSE, 0, &pause_addr_hi, - &pause_addr_lo, 0); - *last_pause_ptr = pause_addr_lo; - - dma_low_save2 = dev_priv->dma_low; - dev_priv->dma_low = dma_low_save1; - via_hook_segment(dev_priv, jump_addr_hi, jump_addr_lo, 0); - dev_priv->dma_low = dma_low_save2; - via_hook_segment(dev_priv, pause_addr_hi, pause_addr_lo, 0); -} - - -static void via_cmdbuf_rewind(drm_via_private_t *dev_priv) -{ - via_cmdbuf_jump(dev_priv); -} - -static void via_cmdbuf_flush(drm_via_private_t *dev_priv, uint32_t cmd_type) -{ - uint32_t pause_addr_lo, pause_addr_hi; - - via_align_cmd(dev_priv, cmd_type, 0, &pause_addr_hi, &pause_addr_lo, 0); - via_hook_segment(dev_priv, pause_addr_hi, pause_addr_lo, 0); -} - -static void via_cmdbuf_pause(drm_via_private_t *dev_priv) -{ - via_cmdbuf_flush(dev_priv, HC_HAGPBpID_PAUSE); -} - -static void via_cmdbuf_reset(drm_via_private_t *dev_priv) -{ - via_cmdbuf_flush(dev_priv, HC_HAGPBpID_STOP); - via_wait_idle(dev_priv); -} - -/* - * User interface to the space and lag functions. - */ - -static int via_cmdbuf_size(struct drm_device *dev, void *data, struct drm_file *file_priv) -{ - drm_via_cmdbuf_size_t *d_siz = data; - int ret = 0; - uint32_t tmp_size, count; - drm_via_private_t *dev_priv; - - DRM_DEBUG("\n"); - LOCK_TEST_WITH_RETURN(dev, file_priv); - - dev_priv = (drm_via_private_t *) dev->dev_private; - - if (dev_priv->ring.virtual_start == NULL) { - DRM_ERROR("called without initializing AGP ring buffer.\n"); - return -EFAULT; - } - - count = 1000000; - tmp_size = d_siz->size; - switch (d_siz->func) { - case VIA_CMDBUF_SPACE: - while (((tmp_size = via_cmdbuf_space(dev_priv)) < d_siz->size) - && --count) { - if (!d_siz->wait) - break; - } - if (!count) { - DRM_ERROR("VIA_CMDBUF_SPACE timed out.\n"); - ret = -EAGAIN; - } - break; - case VIA_CMDBUF_LAG: - while (((tmp_size = via_cmdbuf_lag(dev_priv)) > d_siz->size) - && --count) { - if (!d_siz->wait) - break; - } - if (!count) { - DRM_ERROR("VIA_CMDBUF_LAG timed out.\n"); - ret = -EAGAIN; - } - break; - default: - ret = -EFAULT; - } - d_siz->size = tmp_size; - - return ret; -} - -const struct drm_ioctl_desc via_ioctls[] = { - DRM_IOCTL_DEF_DRV(VIA_ALLOCMEM, via_mem_alloc, DRM_AUTH), - DRM_IOCTL_DEF_DRV(VIA_FREEMEM, via_mem_free, DRM_AUTH), - DRM_IOCTL_DEF_DRV(VIA_AGP_INIT, via_agp_init, DRM_AUTH|DRM_MASTER), - DRM_IOCTL_DEF_DRV(VIA_FB_INIT, via_fb_init, DRM_AUTH|DRM_MASTER), - DRM_IOCTL_DEF_DRV(VIA_MAP_INIT, via_map_init, DRM_AUTH|DRM_MASTER), - DRM_IOCTL_DEF_DRV(VIA_DEC_FUTEX, via_decoder_futex, DRM_AUTH), - DRM_IOCTL_DEF_DRV(VIA_DMA_INIT, via_dma_init, DRM_AUTH), - DRM_IOCTL_DEF_DRV(VIA_CMDBUFFER, via_cmdbuffer, DRM_AUTH), - DRM_IOCTL_DEF_DRV(VIA_FLUSH, via_flush_ioctl, DRM_AUTH), - DRM_IOCTL_DEF_DRV(VIA_PCICMD, via_pci_cmdbuffer, DRM_AUTH), - DRM_IOCTL_DEF_DRV(VIA_CMDBUF_SIZE, via_cmdbuf_size, DRM_AUTH), - DRM_IOCTL_DEF_DRV(VIA_WAIT_IRQ, via_wait_irq, DRM_AUTH), - DRM_IOCTL_DEF_DRV(VIA_DMA_BLIT, via_dma_blit, DRM_AUTH), - DRM_IOCTL_DEF_DRV(VIA_BLIT_SYNC, via_dma_blit_sync, DRM_AUTH) -}; - -int via_max_ioctl = ARRAY_SIZE(via_ioctls); |