From c21a7b763ad31c3473ba2c9a1a01bb729bc13bb5 Mon Sep 17 00:00:00 2001 From: Thomas Hellstrom Date: Wed, 5 Jul 2006 15:52:35 +0000 Subject: SiS 315 Awareness. --- linux-core/sis_mm.c | 72 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) (limited to 'linux-core/sis_mm.c') diff --git a/linux-core/sis_mm.c b/linux-core/sis_mm.c index a89ed64b..70e2fac4 100644 --- a/linux-core/sis_mm.c +++ b/linux-core/sis_mm.c @@ -232,6 +232,77 @@ static int sis_ioctl_agp_alloc(DRM_IOCTL_ARGS) return sis_drm_alloc(dev, priv, data, AGP_TYPE); } +static drm_local_map_t *sis_reg_init(drm_device_t *dev) +{ + drm_map_list_t *entry; + drm_local_map_t *map; + + list_for_each_entry(entry, &dev->maplist->head, head) { + map = entry->map; + if (!map) + continue; + if (map->type == _DRM_REGISTERS) { + return map; + } + } + return NULL; +} + +int +sis_idle(drm_device_t *dev) +{ + drm_sis_private_t *dev_priv = dev->dev_private; + uint32_t idle_reg; + unsigned long end; + int i; + + if (dev_priv->idle_fault) + return 0; + + if (dev_priv->mmio == NULL) { + dev_priv->mmio = sis_reg_init(dev); + if (dev_priv->mmio == NULL) { + DRM_ERROR("Could not find register map.\n"); + return 0; + } + } + + /* + * Implement a device switch here if needed + */ + + if (dev_priv->chipset != SIS_CHIP_315) + return 0; + + /* + * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here + * because its polling frequency is too low. + */ + + end = jiffies + (DRM_HZ * 3); + + for (i=0; i<4; ++i) { + do { + idle_reg = SIS_READ(0x85cc); + } while ( !time_after_eq(jiffies, end) && + ((idle_reg & 0x80000000) != 0x80000000)); + } + + if (time_after_eq(jiffies, end)) { + DRM_ERROR("Graphics engine idle timeout. " + "Disabling idle check\n"); + dev_priv->idle_fault = TRUE; + } + + /* + * The caller never sees an error code. It gets trapped + * in libdrm. + */ + + return 0; +} + + void sis_lastclose(struct drm_device *dev) { drm_sis_private_t *dev_priv = dev->dev_private; @@ -243,6 +314,7 @@ void sis_lastclose(struct drm_device *dev) drm_sman_cleanup(&dev_priv->sman); dev_priv->vram_initialized = FALSE; dev_priv->agp_initialized = FALSE; + dev_priv->mmio = NULL; up(&dev->struct_sem); } -- cgit v1.2.3