int i915_save_state(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int i;
pci_read_config_byte(dev->pdev, LBB, &dev_priv->saveLBB);
/* Hardware status page */
dev_priv->saveHWS = I915_READ(HWS_PGA);
i915_save_display(dev);
/* Interrupt state */
if (IS_IRONLAKE(dev)) {
dev_priv->saveDEIER = I915_READ(DEIER);
dev_priv->saveDEIMR = I915_READ(DEIMR);
dev_priv->saveGTIER = I915_READ(GTIER);
dev_priv->saveGTIMR = I915_READ(GTIMR);
dev_priv->saveFDI_RXA_IMR = I915_READ(FDI_RXA_IMR);
dev_priv->saveFDI_RXB_IMR = I915_READ(FDI_RXB_IMR);
dev_priv->saveMCHBAR_RENDER_STANDBY =
I915_READ(MCHBAR_RENDER_STANDBY);
} else {
dev_priv->saveIER = I915_READ(IER);
dev_priv->saveIMR = I915_READ(IMR);
}
if (IS_IRONLAKE_M(dev))
ironlake_disable_drps(dev);
/* Cache mode state */
dev_priv->saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0);
/* Memory Arbitration state */
dev_priv->saveMI_ARB_STATE = I915_READ(MI_ARB_STATE);
/* Scratch space */
for (i = 0; i < 16; i++) {
dev_priv->saveSWF0[i] = I915_READ(SWF00 + (i << 2));
dev_priv->saveSWF1[i] = I915_READ(SWF10 + (i << 2));
}
for (i = 0; i < 3; i++)
dev_priv->saveSWF2[i] = I915_READ(SWF30 + (i << 2));
/* Fences */
if (IS_I965G(dev)) {
for (i = 0; i < 16; i++)
dev_priv->saveFENCE[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
} else {
for (i = 0; i < 8; i++)
dev_priv->saveFENCE[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
for (i = 0; i < 8; i++)
dev_priv->saveFENCE[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
}
return 0;
}
int i915_save_state(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int i;
pci_read_config_byte(dev->pdev, LBB, &dev_priv->saveLBB);
mutex_lock(&dev->struct_mutex);
dev_priv->saveHWS = I915_READ(HWS_PGA);
i915_save_display(dev);
if (HAS_PCH_SPLIT(dev)) {
dev_priv->saveDEIER = I915_READ(DEIER);
dev_priv->saveDEIMR = I915_READ(DEIMR);
dev_priv->saveGTIER = I915_READ(GTIER);
dev_priv->saveGTIMR = I915_READ(GTIMR);
dev_priv->saveFDI_RXA_IMR = I915_READ(_FDI_RXA_IMR);
dev_priv->saveFDI_RXB_IMR = I915_READ(_FDI_RXB_IMR);
dev_priv->saveMCHBAR_RENDER_STANDBY =
I915_READ(RSTDBYCTL);
dev_priv->savePCH_PORT_HOTPLUG = I915_READ(PCH_PORT_HOTPLUG);
} else {
dev_priv->saveIER = I915_READ(IER);
dev_priv->saveIMR = I915_READ(IMR);
}
if (IS_IRONLAKE_M(dev))
ironlake_disable_drps(dev);
if (INTEL_INFO(dev)->gen >= 6)
gen6_disable_rps(dev);
dev_priv->saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0);
dev_priv->saveMI_ARB_STATE = I915_READ(MI_ARB_STATE);
for (i = 0; i < 16; i++) {
dev_priv->saveSWF0[i] = I915_READ(SWF00 + (i << 2));
dev_priv->saveSWF1[i] = I915_READ(SWF10 + (i << 2));
}
for (i = 0; i < 3; i++)
dev_priv->saveSWF2[i] = I915_READ(SWF30 + (i << 2));
mutex_unlock(&dev->struct_mutex);
return 0;
}
int i915_save_state(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int i;
mutex_lock(&dev->struct_mutex);
i915_save_display(dev);
if (!drm_core_check_feature(dev, DRIVER_MODESET)) {
/* Interrupt state */
if (HAS_PCH_SPLIT(dev)) {
dev_priv->regfile.saveDEIER = I915_READ(DEIER);
dev_priv->regfile.saveDEIMR = I915_READ(DEIMR);
dev_priv->regfile.saveGTIER = I915_READ(GTIER);
dev_priv->regfile.saveGTIMR = I915_READ(GTIMR);
dev_priv->regfile.saveFDI_RXA_IMR = I915_READ(_FDI_RXA_IMR);
dev_priv->regfile.saveFDI_RXB_IMR = I915_READ(_FDI_RXB_IMR);
dev_priv->regfile.saveMCHBAR_RENDER_STANDBY =
I915_READ(RSTDBYCTL);
dev_priv->regfile.savePCH_PORT_HOTPLUG = I915_READ(PCH_PORT_HOTPLUG);
} else {
dev_priv->regfile.saveIER = I915_READ(IER);
dev_priv->regfile.saveIMR = I915_READ(IMR);
}
}
if (IS_GEN4(dev))
pci_read_config_word(dev->pdev, GCDGMBUS,
&dev_priv->regfile.saveGCDGMBUS);
/* Cache mode state */
if (INTEL_INFO(dev)->gen < 7)
dev_priv->regfile.saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0);
/* Memory Arbitration state */
dev_priv->regfile.saveMI_ARB_STATE = I915_READ(MI_ARB_STATE);
/* Scratch space */
for (i = 0; i < 16; i++) {
dev_priv->regfile.saveSWF0[i] = I915_READ(SWF00 + (i << 2));
dev_priv->regfile.saveSWF1[i] = I915_READ(SWF10 + (i << 2));
}
for (i = 0; i < 3; i++)
dev_priv->regfile.saveSWF2[i] = I915_READ(SWF30 + (i << 2));
mutex_unlock(&dev->struct_mutex);
return 0;
}
int i915_save_state(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int i;
dev_priv->saveLBB = pci_read_config(dev->dev, LBB, 1);
/* Hardware status page */
dev_priv->saveHWS = I915_READ(HWS_PGA);
i915_save_display(dev);
/* Interrupt state */
if (HAS_PCH_SPLIT(dev)) {
dev_priv->saveDEIER = I915_READ(DEIER);
dev_priv->saveDEIMR = I915_READ(DEIMR);
dev_priv->saveGTIER = I915_READ(GTIER);
dev_priv->saveGTIMR = I915_READ(GTIMR);
dev_priv->saveFDI_RXA_IMR = I915_READ(_FDI_RXA_IMR);
dev_priv->saveFDI_RXB_IMR = I915_READ(_FDI_RXB_IMR);
dev_priv->saveMCHBAR_RENDER_STANDBY =
I915_READ(RSTDBYCTL);
dev_priv->savePCH_PORT_HOTPLUG = I915_READ(PCH_PORT_HOTPLUG);
} else {
dev_priv->saveIER = I915_READ(IER);
dev_priv->saveIMR = I915_READ(IMR);
}
if (IS_IRONLAKE_M(dev))
ironlake_disable_drps(dev);
if (INTEL_INFO(dev)->gen >= 6)
gen6_disable_rps(dev);
/* Cache mode state */
dev_priv->saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0);
/* Memory Arbitration state */
dev_priv->saveMI_ARB_STATE = I915_READ(MI_ARB_STATE);
/* Scratch space */
for (i = 0; i < 16; i++) {
dev_priv->saveSWF0[i] = I915_READ(SWF00 + (i << 2));
dev_priv->saveSWF1[i] = I915_READ(SWF10 + (i << 2));
}
for (i = 0; i < 3; i++)
dev_priv->saveSWF2[i] = I915_READ(SWF30 + (i << 2));
return 0;
}
int i915_save_state(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
int i;
mutex_lock(&dev->struct_mutex);
i915_save_display(dev);
if (IS_GEN4(dev))
pci_read_config_word(dev->pdev, GCDGMBUS,
&dev_priv->regfile.saveGCDGMBUS);
/* Cache mode state */
if (INTEL_INFO(dev)->gen < 7)
dev_priv->regfile.saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0);
/* Memory Arbitration state */
dev_priv->regfile.saveMI_ARB_STATE = I915_READ(MI_ARB_STATE);
/* Scratch space */
if (IS_GEN2(dev_priv) && IS_MOBILE(dev_priv)) {
for (i = 0; i < 7; i++) {
dev_priv->regfile.saveSWF0[i] = I915_READ(SWF0(i));
dev_priv->regfile.saveSWF1[i] = I915_READ(SWF1(i));
}
for (i = 0; i < 3; i++)
dev_priv->regfile.saveSWF3[i] = I915_READ(SWF3(i));
} else if (IS_GEN2(dev_priv)) {
for (i = 0; i < 7; i++)
dev_priv->regfile.saveSWF1[i] = I915_READ(SWF1(i));
} else if (HAS_GMCH_DISPLAY(dev_priv)) {
for (i = 0; i < 16; i++) {
dev_priv->regfile.saveSWF0[i] = I915_READ(SWF0(i));
dev_priv->regfile.saveSWF1[i] = I915_READ(SWF1(i));
}
for (i = 0; i < 3; i++)
dev_priv->regfile.saveSWF3[i] = I915_READ(SWF3(i));
}
mutex_unlock(&dev->struct_mutex);
return 0;
}
/**
* i965_reset - reset chip after a hang
* @dev: drm device to reset
* @flags: reset domains
*
* Reset the chip. Useful if a hang is detected. Returns zero on successful
* reset or otherwise an error code.
*
* Procedure is fairly simple:
* - reset the chip using the reset reg
* - re-init context state
* - re-init hardware status page
* - re-init ring buffer
* - re-init interrupt state
* - re-init display
*/
int i965_reset(struct drm_device *dev, u8 flags)
{
drm_i915_private_t *dev_priv = dev->dev_private;
unsigned long timeout;
u8 gdrst;
/*
* We really should only reset the display subsystem if we actually
* need to
*/
bool need_display = true;
mutex_lock(&dev->struct_mutex);
/*
* Clear request list
*/
i915_gem_retire_requests(dev);
if (need_display)
i915_save_display(dev);
if (IS_I965G(dev) || IS_G4X(dev)) {
/*
* Set the domains we want to reset, then the reset bit (bit 0).
* Clear the reset bit after a while and wait for hardware status
* bit (bit 1) to be set
*/
pci_read_config_byte(dev->pdev, GDRST, &gdrst);
pci_write_config_byte(dev->pdev, GDRST, gdrst | flags | ((flags == GDRST_FULL) ? 0x1 : 0x0));
udelay(50);
pci_write_config_byte(dev->pdev, GDRST, gdrst & 0xfe);
/* ...we don't want to loop forever though, 500ms should be plenty */
timeout = jiffies + msecs_to_jiffies(500);
do {
udelay(100);
pci_read_config_byte(dev->pdev, GDRST, &gdrst);
} while ((gdrst & 0x1) && time_after(timeout, jiffies));
if (gdrst & 0x1) {
WARN(true, "i915: Failed to reset chip\n");
mutex_unlock(&dev->struct_mutex);
return -EIO;
}
} else {
DRM_ERROR("Error occurred. Don't know how to reset this chip.\n");
mutex_unlock(&dev->struct_mutex);
return -ENODEV;
}
/* Ok, now get things going again... */
/*
* Everything depends on having the GTT running, so we need to start
* there. Fortunately we don't need to do this unless we reset the
* chip at a PCI level.
*
* Next we need to restore the context, but we don't use those
* yet either...
*
* Ring buffer needs to be re-initialized in the KMS case, or if X
* was running at the time of the reset (i.e. we weren't VT
* switched away).
*/
if (drm_core_check_feature(dev, DRIVER_MODESET) ||
!dev_priv->mm.suspended) {
drm_i915_ring_buffer_t *ring = &dev_priv->ring;
struct drm_gem_object *obj = ring->ring_obj;
struct drm_i915_gem_object *obj_priv = obj->driver_private;
dev_priv->mm.suspended = 0;
/* Stop the ring if it's running. */
I915_WRITE(PRB0_CTL, 0);
I915_WRITE(PRB0_TAIL, 0);
I915_WRITE(PRB0_HEAD, 0);
/* Initialize the ring. */
I915_WRITE(PRB0_START, obj_priv->gtt_offset);
I915_WRITE(PRB0_CTL,
((obj->size - 4096) & RING_NR_PAGES) |
RING_NO_REPORT |
RING_VALID);
if (!drm_core_check_feature(dev, DRIVER_MODESET))
i915_kernel_lost_context(dev);
else {
ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR;
ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR;
ring->space = ring->head - (ring->tail + 8);
if (ring->space < 0)
ring->space += ring->Size;
}
mutex_unlock(&dev->struct_mutex);
drm_irq_uninstall(dev);
drm_irq_install(dev);
mutex_lock(&dev->struct_mutex);
}
/*
* Display needs restore too...
*/
if (need_display)
i915_restore_display(dev);
mutex_unlock(&dev->struct_mutex);
return 0;
}
int i965_reset(struct drm_device *dev, u8 flags)
{
drm_i915_private_t *dev_priv = dev->dev_private;
unsigned long timeout;
u8 gdrst;
/*
* We really should only reset the display subsystem if we actually
* need to
*/
bool need_display = true;
mutex_lock(&dev->struct_mutex);
/*
* Clear request list
*/
i915_gem_retire_requests(dev, &dev_priv->render_ring);
if (need_display)
i915_save_display(dev);
if (IS_I965G(dev) || IS_G4X(dev)) {
/*
* Set the domains we want to reset, then the reset bit (bit 0).
* Clear the reset bit after a while and wait for hardware status
* bit (bit 1) to be set
*/
pci_read_config_byte(dev->pdev, GDRST, &gdrst);
pci_write_config_byte(dev->pdev, GDRST, gdrst | flags | ((flags == GDRST_FULL) ? 0x1 : 0x0));
udelay(50);
pci_write_config_byte(dev->pdev, GDRST, gdrst & 0xfe);
/* ...we don't want to loop forever though, 500ms should be plenty */
timeout = jiffies + msecs_to_jiffies(500);
do {
udelay(100);
pci_read_config_byte(dev->pdev, GDRST, &gdrst);
} while ((gdrst & 0x1) && time_after(timeout, jiffies));
if (gdrst & 0x1) {
WARN(true, "i915: Failed to reset chip\n");
mutex_unlock(&dev->struct_mutex);
return -EIO;
}
} else {
DRM_ERROR("Error occurred. Don't know how to reset this chip.\n");
mutex_unlock(&dev->struct_mutex);
return -ENODEV;
}
/* Ok, now get things going again... */
/*
* Everything depends on having the GTT running, so we need to start
* there. Fortunately we don't need to do this unless we reset the
* chip at a PCI level.
*
* Next we need to restore the context, but we don't use those
* yet either...
*
* Ring buffer needs to be re-initialized in the KMS case, or if X
* was running at the time of the reset (i.e. we weren't VT
* switched away).
*/
if (drm_core_check_feature(dev, DRIVER_MODESET) ||
!dev_priv->mm.suspended) {
struct intel_ring_buffer *ring = &dev_priv->render_ring;
dev_priv->mm.suspended = 0;
ring->init(dev, ring);
mutex_unlock(&dev->struct_mutex);
drm_irq_uninstall(dev);
drm_irq_install(dev);
mutex_lock(&dev->struct_mutex);
}
/*
* Display needs restore too...
*/
if (need_display)
i915_restore_display(dev);
mutex_unlock(&dev->struct_mutex);
return 0;
}