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drm/radeon: add support for interrupts on CIK (v5)

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Todo:
- handle interrupts for compute queues

v2: add documentation
v3: update to latest reset code
v4: update to latest illegal CP handling
v5: fix missing break in interrupt handler switch statement

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2012-11-09 10:45:57 -05:00
parent f6796caee6
commit a59781bbe5
3 changed files with 1021 additions and 0 deletions
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840
drivers/gpu/drm/radeon/cik.c
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@ -62,6 +62,8 @@ MODULE_FIRMWARE("radeon/KABINI_ce.bin");
MODULE_FIRMWARE("radeon/KABINI_mec.bin");
MODULE_FIRMWARE("radeon/KABINI_rlc.bin");
extern int r600_ih_ring_alloc(struct radeon_device *rdev);
extern void r600_ih_ring_fini(struct radeon_device *rdev);
extern void evergreen_mc_stop(struct radeon_device *rdev, struct evergreen_mc_save *save);
extern void evergreen_mc_resume(struct radeon_device *rdev, struct evergreen_mc_save *save);
extern void si_vram_gtt_location(struct radeon_device *rdev, struct radeon_mc *mc);
@ -2919,3 +2921,841 @@ static int cik_rlc_resume(struct radeon_device *rdev)
return 0;
}
/*
* Interrupts
* Starting with r6xx, interrupts are handled via a ring buffer.
* Ring buffers are areas of GPU accessible memory that the GPU
* writes interrupt vectors into and the host reads vectors out of.
* There is a rptr (read pointer) that determines where the
* host is currently reading, and a wptr (write pointer)
* which determines where the GPU has written. When the
* pointers are equal, the ring is idle. When the GPU
* writes vectors to the ring buffer, it increments the
* wptr. When there is an interrupt, the host then starts
* fetching commands and processing them until the pointers are
* equal again at which point it updates the rptr.
*/
/**
* cik_enable_interrupts - Enable the interrupt ring buffer
*
* @rdev: radeon_device pointer
*
* Enable the interrupt ring buffer (CIK).
*/
static void cik_enable_interrupts(struct radeon_device *rdev)
{
u32 ih_cntl = RREG32(IH_CNTL);
u32 ih_rb_cntl = RREG32(IH_RB_CNTL);
ih_cntl |= ENABLE_INTR;
ih_rb_cntl |= IH_RB_ENABLE;
WREG32(IH_CNTL, ih_cntl);
WREG32(IH_RB_CNTL, ih_rb_cntl);
rdev->ih.enabled = true;
}
/**
* cik_disable_interrupts - Disable the interrupt ring buffer
*
* @rdev: radeon_device pointer
*
* Disable the interrupt ring buffer (CIK).
*/
static void cik_disable_interrupts(struct radeon_device *rdev)
{
u32 ih_rb_cntl = RREG32(IH_RB_CNTL);
u32 ih_cntl = RREG32(IH_CNTL);
ih_rb_cntl &= ~IH_RB_ENABLE;
ih_cntl &= ~ENABLE_INTR;
WREG32(IH_RB_CNTL, ih_rb_cntl);
WREG32(IH_CNTL, ih_cntl);
/* set rptr, wptr to 0 */
WREG32(IH_RB_RPTR, 0);
WREG32(IH_RB_WPTR, 0);
rdev->ih.enabled = false;
rdev->ih.rptr = 0;
}
/**
* cik_disable_interrupt_state - Disable all interrupt sources
*
* @rdev: radeon_device pointer
*
* Clear all interrupt enable bits used by the driver (CIK).
*/
static void cik_disable_interrupt_state(struct radeon_device *rdev)
{
u32 tmp;
/* gfx ring */
WREG32(CP_INT_CNTL_RING0, CNTX_BUSY_INT_ENABLE | CNTX_EMPTY_INT_ENABLE);
/* compute queues */
WREG32(CP_ME1_PIPE0_INT_CNTL, 0);
WREG32(CP_ME1_PIPE1_INT_CNTL, 0);
WREG32(CP_ME1_PIPE2_INT_CNTL, 0);
WREG32(CP_ME1_PIPE3_INT_CNTL, 0);
WREG32(CP_ME2_PIPE0_INT_CNTL, 0);
WREG32(CP_ME2_PIPE1_INT_CNTL, 0);
WREG32(CP_ME2_PIPE2_INT_CNTL, 0);
WREG32(CP_ME2_PIPE3_INT_CNTL, 0);
/* grbm */
WREG32(GRBM_INT_CNTL, 0);
/* vline/vblank, etc. */
WREG32(LB_INTERRUPT_MASK + EVERGREEN_CRTC0_REGISTER_OFFSET, 0);
WREG32(LB_INTERRUPT_MASK + EVERGREEN_CRTC1_REGISTER_OFFSET, 0);
if (rdev->num_crtc >= 4) {
WREG32(LB_INTERRUPT_MASK + EVERGREEN_CRTC2_REGISTER_OFFSET, 0);
WREG32(LB_INTERRUPT_MASK + EVERGREEN_CRTC3_REGISTER_OFFSET, 0);
}
if (rdev->num_crtc >= 6) {
WREG32(LB_INTERRUPT_MASK + EVERGREEN_CRTC4_REGISTER_OFFSET, 0);
WREG32(LB_INTERRUPT_MASK + EVERGREEN_CRTC5_REGISTER_OFFSET, 0);
}
/* dac hotplug */
WREG32(DAC_AUTODETECT_INT_CONTROL, 0);
/* digital hotplug */
tmp = RREG32(DC_HPD1_INT_CONTROL) & DC_HPDx_INT_POLARITY;
WREG32(DC_HPD1_INT_CONTROL, tmp);
tmp = RREG32(DC_HPD2_INT_CONTROL) & DC_HPDx_INT_POLARITY;
WREG32(DC_HPD2_INT_CONTROL, tmp);
tmp = RREG32(DC_HPD3_INT_CONTROL) & DC_HPDx_INT_POLARITY;
WREG32(DC_HPD3_INT_CONTROL, tmp);
tmp = RREG32(DC_HPD4_INT_CONTROL) & DC_HPDx_INT_POLARITY;
WREG32(DC_HPD4_INT_CONTROL, tmp);
tmp = RREG32(DC_HPD5_INT_CONTROL) & DC_HPDx_INT_POLARITY;
WREG32(DC_HPD5_INT_CONTROL, tmp);
tmp = RREG32(DC_HPD6_INT_CONTROL) & DC_HPDx_INT_POLARITY;
WREG32(DC_HPD6_INT_CONTROL, tmp);
}
/**
* cik_irq_init - init and enable the interrupt ring
*
* @rdev: radeon_device pointer
*
* Allocate a ring buffer for the interrupt controller,
* enable the RLC, disable interrupts, enable the IH
* ring buffer and enable it (CIK).
* Called at device load and reume.
* Returns 0 for success, errors for failure.
*/
static int cik_irq_init(struct radeon_device *rdev)
{
int ret = 0;
int rb_bufsz;
u32 interrupt_cntl, ih_cntl, ih_rb_cntl;
/* allocate ring */
ret = r600_ih_ring_alloc(rdev);
if (ret)
return ret;
/* disable irqs */
cik_disable_interrupts(rdev);
/* init rlc */
ret = cik_rlc_resume(rdev);
if (ret) {
r600_ih_ring_fini(rdev);
return ret;
}
/* setup interrupt control */
/* XXX this should actually be a bus address, not an MC address. same on older asics */
WREG32(INTERRUPT_CNTL2, rdev->ih.gpu_addr >> 8);
interrupt_cntl = RREG32(INTERRUPT_CNTL);
/* IH_DUMMY_RD_OVERRIDE=0 - dummy read disabled with msi, enabled without msi
* IH_DUMMY_RD_OVERRIDE=1 - dummy read controlled by IH_DUMMY_RD_EN
*/
interrupt_cntl &= ~IH_DUMMY_RD_OVERRIDE;
/* IH_REQ_NONSNOOP_EN=1 if ring is in non-cacheable memory, e.g., vram */
interrupt_cntl &= ~IH_REQ_NONSNOOP_EN;
WREG32(INTERRUPT_CNTL, interrupt_cntl);
WREG32(IH_RB_BASE, rdev->ih.gpu_addr >> 8);
rb_bufsz = drm_order(rdev->ih.ring_size / 4);
ih_rb_cntl = (IH_WPTR_OVERFLOW_ENABLE |
IH_WPTR_OVERFLOW_CLEAR |
(rb_bufsz << 1));
if (rdev->wb.enabled)
ih_rb_cntl |= IH_WPTR_WRITEBACK_ENABLE;
/* set the writeback address whether it's enabled or not */
WREG32(IH_RB_WPTR_ADDR_LO, (rdev->wb.gpu_addr + R600_WB_IH_WPTR_OFFSET) & 0xFFFFFFFC);
WREG32(IH_RB_WPTR_ADDR_HI, upper_32_bits(rdev->wb.gpu_addr + R600_WB_IH_WPTR_OFFSET) & 0xFF);
WREG32(IH_RB_CNTL, ih_rb_cntl);
/* set rptr, wptr to 0 */
WREG32(IH_RB_RPTR, 0);
WREG32(IH_RB_WPTR, 0);
/* Default settings for IH_CNTL (disabled at first) */
ih_cntl = MC_WRREQ_CREDIT(0x10) | MC_WR_CLEAN_CNT(0x10) | MC_VMID(0);
/* RPTR_REARM only works if msi's are enabled */
if (rdev->msi_enabled)
ih_cntl |= RPTR_REARM;
WREG32(IH_CNTL, ih_cntl);
/* force the active interrupt state to all disabled */
cik_disable_interrupt_state(rdev);
pci_set_master(rdev->pdev);
/* enable irqs */
cik_enable_interrupts(rdev);
return ret;
}
/**
* cik_irq_set - enable/disable interrupt sources
*
* @rdev: radeon_device pointer
*
* Enable interrupt sources on the GPU (vblanks, hpd,
* etc.) (CIK).
* Returns 0 for success, errors for failure.
*/
int cik_irq_set(struct radeon_device *rdev)
{
u32 cp_int_cntl = CNTX_BUSY_INT_ENABLE | CNTX_EMPTY_INT_ENABLE |
PRIV_INSTR_INT_ENABLE | PRIV_REG_INT_ENABLE;
u32 crtc1 = 0, crtc2 = 0, crtc3 = 0, crtc4 = 0, crtc5 = 0, crtc6 = 0;
u32 hpd1, hpd2, hpd3, hpd4, hpd5, hpd6;
u32 grbm_int_cntl = 0;
if (!rdev->irq.installed) {
WARN(1, "Can't enable IRQ/MSI because no handler is installed\n");
return -EINVAL;
}
/* don't enable anything if the ih is disabled */
if (!rdev->ih.enabled) {
cik_disable_interrupts(rdev);
/* force the active interrupt state to all disabled */
cik_disable_interrupt_state(rdev);
return 0;
}
hpd1 = RREG32(DC_HPD1_INT_CONTROL) & ~DC_HPDx_INT_EN;
hpd2 = RREG32(DC_HPD2_INT_CONTROL) & ~DC_HPDx_INT_EN;
hpd3 = RREG32(DC_HPD3_INT_CONTROL) & ~DC_HPDx_INT_EN;
hpd4 = RREG32(DC_HPD4_INT_CONTROL) & ~DC_HPDx_INT_EN;
hpd5 = RREG32(DC_HPD5_INT_CONTROL) & ~DC_HPDx_INT_EN;
hpd6 = RREG32(DC_HPD6_INT_CONTROL) & ~DC_HPDx_INT_EN;
/* enable CP interrupts on all rings */
if (atomic_read(&rdev->irq.ring_int[RADEON_RING_TYPE_GFX_INDEX])) {
DRM_DEBUG("cik_irq_set: sw int gfx\n");
cp_int_cntl |= TIME_STAMP_INT_ENABLE;
}
/* TODO: compute queues! */
/* CP_ME[1-2]_PIPE[0-3]_INT_CNTL */
if (rdev->irq.crtc_vblank_int[0] ||
atomic_read(&rdev->irq.pflip[0])) {
DRM_DEBUG("cik_irq_set: vblank 0\n");
crtc1 |= VBLANK_INTERRUPT_MASK;
}
if (rdev->irq.crtc_vblank_int[1] ||
atomic_read(&rdev->irq.pflip[1])) {
DRM_DEBUG("cik_irq_set: vblank 1\n");
crtc2 |= VBLANK_INTERRUPT_MASK;
}
if (rdev->irq.crtc_vblank_int[2] ||
atomic_read(&rdev->irq.pflip[2])) {
DRM_DEBUG("cik_irq_set: vblank 2\n");
crtc3 |= VBLANK_INTERRUPT_MASK;
}
if (rdev->irq.crtc_vblank_int[3] ||
atomic_read(&rdev->irq.pflip[3])) {
DRM_DEBUG("cik_irq_set: vblank 3\n");
crtc4 |= VBLANK_INTERRUPT_MASK;
}
if (rdev->irq.crtc_vblank_int[4] ||
atomic_read(&rdev->irq.pflip[4])) {
DRM_DEBUG("cik_irq_set: vblank 4\n");
crtc5 |= VBLANK_INTERRUPT_MASK;
}
if (rdev->irq.crtc_vblank_int[5] ||
atomic_read(&rdev->irq.pflip[5])) {
DRM_DEBUG("cik_irq_set: vblank 5\n");
crtc6 |= VBLANK_INTERRUPT_MASK;
}
if (rdev->irq.hpd[0]) {
DRM_DEBUG("cik_irq_set: hpd 1\n");
hpd1 |= DC_HPDx_INT_EN;
}
if (rdev->irq.hpd[1]) {
DRM_DEBUG("cik_irq_set: hpd 2\n");
hpd2 |= DC_HPDx_INT_EN;
}
if (rdev->irq.hpd[2]) {
DRM_DEBUG("cik_irq_set: hpd 3\n");
hpd3 |= DC_HPDx_INT_EN;
}
if (rdev->irq.hpd[3]) {
DRM_DEBUG("cik_irq_set: hpd 4\n");
hpd4 |= DC_HPDx_INT_EN;
}
if (rdev->irq.hpd[4]) {
DRM_DEBUG("cik_irq_set: hpd 5\n");
hpd5 |= DC_HPDx_INT_EN;
}
if (rdev->irq.hpd[5]) {
DRM_DEBUG("cik_irq_set: hpd 6\n");
hpd6 |= DC_HPDx_INT_EN;
}
WREG32(CP_INT_CNTL_RING0, cp_int_cntl);
WREG32(GRBM_INT_CNTL, grbm_int_cntl);
WREG32(LB_INTERRUPT_MASK + EVERGREEN_CRTC0_REGISTER_OFFSET, crtc1);
WREG32(LB_INTERRUPT_MASK + EVERGREEN_CRTC1_REGISTER_OFFSET, crtc2);
if (rdev->num_crtc >= 4) {
WREG32(LB_INTERRUPT_MASK + EVERGREEN_CRTC2_REGISTER_OFFSET, crtc3);
WREG32(LB_INTERRUPT_MASK + EVERGREEN_CRTC3_REGISTER_OFFSET, crtc4);
}
if (rdev->num_crtc >= 6) {
WREG32(LB_INTERRUPT_MASK + EVERGREEN_CRTC4_REGISTER_OFFSET, crtc5);
WREG32(LB_INTERRUPT_MASK + EVERGREEN_CRTC5_REGISTER_OFFSET, crtc6);
}
WREG32(DC_HPD1_INT_CONTROL, hpd1);
WREG32(DC_HPD2_INT_CONTROL, hpd2);
WREG32(DC_HPD3_INT_CONTROL, hpd3);
WREG32(DC_HPD4_INT_CONTROL, hpd4);
WREG32(DC_HPD5_INT_CONTROL, hpd5);
WREG32(DC_HPD6_INT_CONTROL, hpd6);
return 0;
}
/**
* cik_irq_ack - ack interrupt sources
*
* @rdev: radeon_device pointer
*
* Ack interrupt sources on the GPU (vblanks, hpd,
* etc.) (CIK). Certain interrupts sources are sw
* generated and do not require an explicit ack.
*/
static inline void cik_irq_ack(struct radeon_device *rdev)
{
u32 tmp;
rdev->irq.stat_regs.cik.disp_int = RREG32(DISP_INTERRUPT_STATUS);
rdev->irq.stat_regs.cik.disp_int_cont = RREG32(DISP_INTERRUPT_STATUS_CONTINUE);
rdev->irq.stat_regs.cik.disp_int_cont2 = RREG32(DISP_INTERRUPT_STATUS_CONTINUE2);
rdev->irq.stat_regs.cik.disp_int_cont3 = RREG32(DISP_INTERRUPT_STATUS_CONTINUE3);
rdev->irq.stat_regs.cik.disp_int_cont4 = RREG32(DISP_INTERRUPT_STATUS_CONTINUE4);
rdev->irq.stat_regs.cik.disp_int_cont5 = RREG32(DISP_INTERRUPT_STATUS_CONTINUE5);
rdev->irq.stat_regs.cik.disp_int_cont6 = RREG32(DISP_INTERRUPT_STATUS_CONTINUE6);
if (rdev->irq.stat_regs.cik.disp_int & LB_D1_VBLANK_INTERRUPT)
WREG32(LB_VBLANK_STATUS + EVERGREEN_CRTC0_REGISTER_OFFSET, VBLANK_ACK);
if (rdev->irq.stat_regs.cik.disp_int & LB_D1_VLINE_INTERRUPT)
WREG32(LB_VLINE_STATUS + EVERGREEN_CRTC0_REGISTER_OFFSET, VLINE_ACK);
if (rdev->irq.stat_regs.cik.disp_int_cont & LB_D2_VBLANK_INTERRUPT)
WREG32(LB_VBLANK_STATUS + EVERGREEN_CRTC1_REGISTER_OFFSET, VBLANK_ACK);
if (rdev->irq.stat_regs.cik.disp_int_cont & LB_D2_VLINE_INTERRUPT)
WREG32(LB_VLINE_STATUS + EVERGREEN_CRTC1_REGISTER_OFFSET, VLINE_ACK);
if (rdev->num_crtc >= 4) {
if (rdev->irq.stat_regs.cik.disp_int_cont2 & LB_D3_VBLANK_INTERRUPT)
WREG32(LB_VBLANK_STATUS + EVERGREEN_CRTC2_REGISTER_OFFSET, VBLANK_ACK);
if (rdev->irq.stat_regs.cik.disp_int_cont2 & LB_D3_VLINE_INTERRUPT)
WREG32(LB_VLINE_STATUS + EVERGREEN_CRTC2_REGISTER_OFFSET, VLINE_ACK);
if (rdev->irq.stat_regs.cik.disp_int_cont3 & LB_D4_VBLANK_INTERRUPT)
WREG32(LB_VBLANK_STATUS + EVERGREEN_CRTC3_REGISTER_OFFSET, VBLANK_ACK);
if (rdev->irq.stat_regs.cik.disp_int_cont3 & LB_D4_VLINE_INTERRUPT)
WREG32(LB_VLINE_STATUS + EVERGREEN_CRTC3_REGISTER_OFFSET, VLINE_ACK);
}
if (rdev->num_crtc >= 6) {
if (rdev->irq.stat_regs.cik.disp_int_cont4 & LB_D5_VBLANK_INTERRUPT)
WREG32(LB_VBLANK_STATUS + EVERGREEN_CRTC4_REGISTER_OFFSET, VBLANK_ACK);
if (rdev->irq.stat_regs.cik.disp_int_cont4 & LB_D5_VLINE_INTERRUPT)
WREG32(LB_VLINE_STATUS + EVERGREEN_CRTC4_REGISTER_OFFSET, VLINE_ACK);
if (rdev->irq.stat_regs.cik.disp_int_cont5 & LB_D6_VBLANK_INTERRUPT)
WREG32(LB_VBLANK_STATUS + EVERGREEN_CRTC5_REGISTER_OFFSET, VBLANK_ACK);
if (rdev->irq.stat_regs.cik.disp_int_cont5 & LB_D6_VLINE_INTERRUPT)
WREG32(LB_VLINE_STATUS + EVERGREEN_CRTC5_REGISTER_OFFSET, VLINE_ACK);
}
if (rdev->irq.stat_regs.cik.disp_int & DC_HPD1_INTERRUPT) {
tmp = RREG32(DC_HPD1_INT_CONTROL);
tmp |= DC_HPDx_INT_ACK;
WREG32(DC_HPD1_INT_CONTROL, tmp);
}
if (rdev->irq.stat_regs.cik.disp_int_cont & DC_HPD2_INTERRUPT) {
tmp = RREG32(DC_HPD2_INT_CONTROL);
tmp |= DC_HPDx_INT_ACK;
WREG32(DC_HPD2_INT_CONTROL, tmp);
}
if (rdev->irq.stat_regs.cik.disp_int_cont2 & DC_HPD3_INTERRUPT) {
tmp = RREG32(DC_HPD3_INT_CONTROL);
tmp |= DC_HPDx_INT_ACK;
WREG32(DC_HPD3_INT_CONTROL, tmp);
}
if (rdev->irq.stat_regs.cik.disp_int_cont3 & DC_HPD4_INTERRUPT) {
tmp = RREG32(DC_HPD4_INT_CONTROL);
tmp |= DC_HPDx_INT_ACK;
WREG32(DC_HPD4_INT_CONTROL, tmp);
}
if (rdev->irq.stat_regs.cik.disp_int_cont4 & DC_HPD5_INTERRUPT) {
tmp = RREG32(DC_HPD5_INT_CONTROL);
tmp |= DC_HPDx_INT_ACK;
WREG32(DC_HPD5_INT_CONTROL, tmp);
}
if (rdev->irq.stat_regs.cik.disp_int_cont5 & DC_HPD6_INTERRUPT) {
tmp = RREG32(DC_HPD5_INT_CONTROL);
tmp |= DC_HPDx_INT_ACK;
WREG32(DC_HPD6_INT_CONTROL, tmp);
}
}
/**
* cik_irq_disable - disable interrupts
*
* @rdev: radeon_device pointer
*
* Disable interrupts on the hw (CIK).
*/
static void cik_irq_disable(struct radeon_device *rdev)
{
cik_disable_interrupts(rdev);
/* Wait and acknowledge irq */
mdelay(1);
cik_irq_ack(rdev);
cik_disable_interrupt_state(rdev);
}
/**
* cik_irq_disable - disable interrupts for suspend
*
* @rdev: radeon_device pointer
*
* Disable interrupts and stop the RLC (CIK).
* Used for suspend.
*/
static void cik_irq_suspend(struct radeon_device *rdev)
{
cik_irq_disable(rdev);
cik_rlc_stop(rdev);
}
/**
* cik_irq_fini - tear down interrupt support
*
* @rdev: radeon_device pointer
*
* Disable interrupts on the hw and free the IH ring
* buffer (CIK).
* Used for driver unload.
*/
static void cik_irq_fini(struct radeon_device *rdev)
{
cik_irq_suspend(rdev);
r600_ih_ring_fini(rdev);
}
/**
* cik_get_ih_wptr - get the IH ring buffer wptr
*
* @rdev: radeon_device pointer
*
* Get the IH ring buffer wptr from either the register
* or the writeback memory buffer (CIK). Also check for
* ring buffer overflow and deal with it.
* Used by cik_irq_process().
* Returns the value of the wptr.
*/
static inline u32 cik_get_ih_wptr(struct radeon_device *rdev)
{
u32 wptr, tmp;
if (rdev->wb.enabled)
wptr = le32_to_cpu(rdev->wb.wb[R600_WB_IH_WPTR_OFFSET/4]);
else
wptr = RREG32(IH_RB_WPTR);
if (wptr & RB_OVERFLOW) {
/* When a ring buffer overflow happen start parsing interrupt
* from the last not overwritten vector (wptr + 16). Hopefully
* this should allow us to catchup.
*/
dev_warn(rdev->dev, "IH ring buffer overflow (0x%08X, %d, %d)\n",
wptr, rdev->ih.rptr, (wptr + 16) + rdev->ih.ptr_mask);
rdev->ih.rptr = (wptr + 16) & rdev->ih.ptr_mask;
tmp = RREG32(IH_RB_CNTL);
tmp |= IH_WPTR_OVERFLOW_CLEAR;
WREG32(IH_RB_CNTL, tmp);
}
return (wptr & rdev->ih.ptr_mask);
}
/* CIK IV Ring
* Each IV ring entry is 128 bits:
* [7:0] - interrupt source id
* [31:8] - reserved
* [59:32] - interrupt source data
* [63:60] - reserved
* [71:64] - RINGID: ME_ID [1:0], PIPE_ID[1:0], QUEUE_ID[2:0]
* QUEUE_ID - for compute, which of the 8 queues owned by the dispatcher
* - for gfx, hw shader state (0=PS...5=LS, 6=CS)
* ME_ID - 0 = gfx, 1 = first 4 CS pipes, 2 = second 4 CS pipes
* PIPE_ID - ME0 0=3D
* - ME1&2 compute dispatcher (4 pipes each)
* [79:72] - VMID
* [95:80] - PASID
* [127:96] - reserved
*/
/**
* cik_irq_process - interrupt handler
*
* @rdev: radeon_device pointer
*
* Interrupt hander (CIK). Walk the IH ring,
* ack interrupts and schedule work to handle
* interrupt events.
* Returns irq process return code.
*/
int cik_irq_process(struct radeon_device *rdev)
{
u32 wptr;
u32 rptr;
u32 src_id, src_data, ring_id;
u8 me_id, pipe_id, queue_id;
u32 ring_index;
bool queue_hotplug = false;
bool queue_reset = false;
if (!rdev->ih.enabled || rdev->shutdown)
return IRQ_NONE;
wptr = cik_get_ih_wptr(rdev);
restart_ih:
/* is somebody else already processing irqs? */
if (atomic_xchg(&rdev->ih.lock, 1))
return IRQ_NONE;
rptr = rdev->ih.rptr;
DRM_DEBUG("cik_irq_process start: rptr %d, wptr %d\n", rptr, wptr);
/* Order reading of wptr vs. reading of IH ring data */
rmb();
/* display interrupts */
cik_irq_ack(rdev);
while (rptr != wptr) {
/* wptr/rptr are in bytes! */
ring_index = rptr / 4;
src_id = le32_to_cpu(rdev->ih.ring[ring_index]) & 0xff;
src_data = le32_to_cpu(rdev->ih.ring[ring_index + 1]) & 0xfffffff;
ring_id = le32_to_cpu(rdev->ih.ring[ring_index + 2]) & 0xff;
/* XXX check the bitfield order! */
me_id = (ring_id & 0x60) >> 5;
pipe_id = (ring_id & 0x18) >> 3;
queue_id = (ring_id & 0x7) >> 0;
switch (src_id) {
case 1: /* D1 vblank/vline */
switch (src_data) {
case 0: /* D1 vblank */
if (rdev->irq.stat_regs.cik.disp_int & LB_D1_VBLANK_INTERRUPT) {
if (rdev->irq.crtc_vblank_int[0]) {
drm_handle_vblank(rdev->ddev, 0);
rdev->pm.vblank_sync = true;
wake_up(&rdev->irq.vblank_queue);
}
if (atomic_read(&rdev->irq.pflip[0]))
radeon_crtc_handle_flip(rdev, 0);
rdev->irq.stat_regs.cik.disp_int &= ~LB_D1_VBLANK_INTERRUPT;
DRM_DEBUG("IH: D1 vblank\n");
}
break;
case 1: /* D1 vline */
if (rdev->irq.stat_regs.cik.disp_int & LB_D1_VLINE_INTERRUPT) {
rdev->irq.stat_regs.cik.disp_int &= ~LB_D1_VLINE_INTERRUPT;
DRM_DEBUG("IH: D1 vline\n");
}
break;
default:
DRM_DEBUG("Unhandled interrupt: %d %d\n", src_id, src_data);
break;
}
break;
case 2: /* D2 vblank/vline */
switch (src_data) {
case 0: /* D2 vblank */
if (rdev->irq.stat_regs.cik.disp_int_cont & LB_D2_VBLANK_INTERRUPT) {
if (rdev->irq.crtc_vblank_int[1]) {
drm_handle_vblank(rdev->ddev, 1);
rdev->pm.vblank_sync = true;
wake_up(&rdev->irq.vblank_queue);
}
if (atomic_read(&rdev->irq.pflip[1]))
radeon_crtc_handle_flip(rdev, 1);
rdev->irq.stat_regs.cik.disp_int_cont &= ~LB_D2_VBLANK_INTERRUPT;
DRM_DEBUG("IH: D2 vblank\n");
}
break;
case 1: /* D2 vline */
if (rdev->irq.stat_regs.cik.disp_int_cont & LB_D2_VLINE_INTERRUPT) {
rdev->irq.stat_regs.cik.disp_int_cont &= ~LB_D2_VLINE_INTERRUPT;
DRM_DEBUG("IH: D2 vline\n");
}
break;
default:
DRM_DEBUG("Unhandled interrupt: %d %d\n", src_id, src_data);
break;
}
break;
case 3: /* D3 vblank/vline */
switch (src_data) {
case 0: /* D3 vblank */
if (rdev->irq.stat_regs.cik.disp_int_cont2 & LB_D3_VBLANK_INTERRUPT) {
if (rdev->irq.crtc_vblank_int[2]) {
drm_handle_vblank(rdev->ddev, 2);
rdev->pm.vblank_sync = true;
wake_up(&rdev->irq.vblank_queue);
}
if (atomic_read(&rdev->irq.pflip[2]))
radeon_crtc_handle_flip(rdev, 2);
rdev->irq.stat_regs.cik.disp_int_cont2 &= ~LB_D3_VBLANK_INTERRUPT;
DRM_DEBUG("IH: D3 vblank\n");
}
break;
case 1: /* D3 vline */
if (rdev->irq.stat_regs.cik.disp_int_cont2 & LB_D3_VLINE_INTERRUPT) {
rdev->irq.stat_regs.cik.disp_int_cont2 &= ~LB_D3_VLINE_INTERRUPT;
DRM_DEBUG("IH: D3 vline\n");
}
break;
default:
DRM_DEBUG("Unhandled interrupt: %d %d\n", src_id, src_data);
break;
}
break;
case 4: /* D4 vblank/vline */
switch (src_data) {
case 0: /* D4 vblank */
if (rdev->irq.stat_regs.cik.disp_int_cont3 & LB_D4_VBLANK_INTERRUPT) {
if (rdev->irq.crtc_vblank_int[3]) {
drm_handle_vblank(rdev->ddev, 3);
rdev->pm.vblank_sync = true;
wake_up(&rdev->irq.vblank_queue);
}
if (atomic_read(&rdev->irq.pflip[3]))
radeon_crtc_handle_flip(rdev, 3);
rdev->irq.stat_regs.cik.disp_int_cont3 &= ~LB_D4_VBLANK_INTERRUPT;
DRM_DEBUG("IH: D4 vblank\n");
}
break;
case 1: /* D4 vline */
if (rdev->irq.stat_regs.cik.disp_int_cont3 & LB_D4_VLINE_INTERRUPT) {
rdev->irq.stat_regs.cik.disp_int_cont3 &= ~LB_D4_VLINE_INTERRUPT;
DRM_DEBUG("IH: D4 vline\n");
}
break;
default:
DRM_DEBUG("Unhandled interrupt: %d %d\n", src_id, src_data);
break;
}
break;
case 5: /* D5 vblank/vline */
switch (src_data) {
case 0: /* D5 vblank */
if (rdev->irq.stat_regs.cik.disp_int_cont4 & LB_D5_VBLANK_INTERRUPT) {
if (rdev->irq.crtc_vblank_int[4]) {
drm_handle_vblank(rdev->ddev, 4);
rdev->pm.vblank_sync = true;
wake_up(&rdev->irq.vblank_queue);
}
if (atomic_read(&rdev->irq.pflip[4]))
radeon_crtc_handle_flip(rdev, 4);
rdev->irq.stat_regs.cik.disp_int_cont4 &= ~LB_D5_VBLANK_INTERRUPT;
DRM_DEBUG("IH: D5 vblank\n");
}
break;
case 1: /* D5 vline */
if (rdev->irq.stat_regs.cik.disp_int_cont4 & LB_D5_VLINE_INTERRUPT) {
rdev->irq.stat_regs.cik.disp_int_cont4 &= ~LB_D5_VLINE_INTERRUPT;
DRM_DEBUG("IH: D5 vline\n");
}
break;
default:
DRM_DEBUG("Unhandled interrupt: %d %d\n", src_id, src_data);
break;
}
break;
case 6: /* D6 vblank/vline */
switch (src_data) {
case 0: /* D6 vblank */
if (rdev->irq.stat_regs.cik.disp_int_cont5 & LB_D6_VBLANK_INTERRUPT) {
if (rdev->irq.crtc_vblank_int[5]) {
drm_handle_vblank(rdev->ddev, 5);
rdev->pm.vblank_sync = true;
wake_up(&rdev->irq.vblank_queue);
}
if (atomic_read(&rdev->irq.pflip[5]))
radeon_crtc_handle_flip(rdev, 5);
rdev->irq.stat_regs.cik.disp_int_cont5 &= ~LB_D6_VBLANK_INTERRUPT;
DRM_DEBUG("IH: D6 vblank\n");
}
break;
case 1: /* D6 vline */
if (rdev->irq.stat_regs.cik.disp_int_cont5 & LB_D6_VLINE_INTERRUPT) {
rdev->irq.stat_regs.cik.disp_int_cont5 &= ~LB_D6_VLINE_INTERRUPT;
DRM_DEBUG("IH: D6 vline\n");
}
break;
default:
DRM_DEBUG("Unhandled interrupt: %d %d\n", src_id, src_data);
break;
}
break;
case 42: /* HPD hotplug */
switch (src_data) {
case 0:
if (rdev->irq.stat_regs.cik.disp_int & DC_HPD1_INTERRUPT) {
rdev->irq.stat_regs.cik.disp_int &= ~DC_HPD1_INTERRUPT;
queue_hotplug = true;
DRM_DEBUG("IH: HPD1\n");
}
break;
case 1:
if (rdev->irq.stat_regs.cik.disp_int_cont & DC_HPD2_INTERRUPT) {
rdev->irq.stat_regs.cik.disp_int_cont &= ~DC_HPD2_INTERRUPT;
queue_hotplug = true;
DRM_DEBUG("IH: HPD2\n");
}
break;
case 2:
if (rdev->irq.stat_regs.cik.disp_int_cont2 & DC_HPD3_INTERRUPT) {
rdev->irq.stat_regs.cik.disp_int_cont2 &= ~DC_HPD3_INTERRUPT;
queue_hotplug = true;
DRM_DEBUG("IH: HPD3\n");
}
break;
case 3:
if (rdev->irq.stat_regs.cik.disp_int_cont3 & DC_HPD4_INTERRUPT) {
rdev->irq.stat_regs.cik.disp_int_cont3 &= ~DC_HPD4_INTERRUPT;
queue_hotplug = true;
DRM_DEBUG("IH: HPD4\n");
}
break;
case 4:
if (rdev->irq.stat_regs.cik.disp_int_cont4 & DC_HPD5_INTERRUPT) {
rdev->irq.stat_regs.cik.disp_int_cont4 &= ~DC_HPD5_INTERRUPT;
queue_hotplug = true;
DRM_DEBUG("IH: HPD5\n");
}
break;
case 5:
if (rdev->irq.stat_regs.cik.disp_int_cont5 & DC_HPD6_INTERRUPT) {
rdev->irq.stat_regs.cik.disp_int_cont5 &= ~DC_HPD6_INTERRUPT;
queue_hotplug = true;
DRM_DEBUG("IH: HPD6\n");
}
break;
default:
DRM_DEBUG("Unhandled interrupt: %d %d\n", src_id, src_data);
break;
}
break;
case 176: /* GFX RB CP_INT */
case 177: /* GFX IB CP_INT */
radeon_fence_process(rdev, RADEON_RING_TYPE_GFX_INDEX);
break;
case 181: /* CP EOP event */
DRM_DEBUG("IH: CP EOP\n");
switch (me_id) {
case 0:
radeon_fence_process(rdev, RADEON_RING_TYPE_GFX_INDEX);
break;
case 1:
/* XXX compute */
break;
case 2:
/* XXX compute */
break;
}
break;
case 184: /* CP Privileged reg access */
DRM_ERROR("Illegal register access in command stream\n");
/* XXX check the bitfield order! */
me_id = (ring_id & 0x60) >> 5;
pipe_id = (ring_id & 0x18) >> 3;
queue_id = (ring_id & 0x7) >> 0;
switch (me_id) {
case 0:
/* This results in a full GPU reset, but all we need to do is soft
* reset the CP for gfx
*/
queue_reset = true;
break;
case 1:
/* XXX compute */
break;
case 2:
/* XXX compute */
break;
}
break;
case 185: /* CP Privileged inst */
DRM_ERROR("Illegal instruction in command stream\n");
switch (me_id) {
case 0:
/* This results in a full GPU reset, but all we need to do is soft
* reset the CP for gfx
*/
queue_reset = true;
break;
case 1:
/* XXX compute */
break;
case 2:
/* XXX compute */
break;
}
break;
case 233: /* GUI IDLE */
DRM_DEBUG("IH: GUI idle\n");
break;
default:
DRM_DEBUG("Unhandled interrupt: %d %d\n", src_id, src_data);
break;
}
/* wptr/rptr are in bytes! */
rptr += 16;
rptr &= rdev->ih.ptr_mask;
}
if (queue_hotplug)
schedule_work(&rdev->hotplug_work);
if (queue_reset)
schedule_work(&rdev->reset_work);
rdev->ih.rptr = rptr;
WREG32(IH_RB_RPTR, rdev->ih.rptr);
atomic_set(&rdev->ih.lock, 0);
/* make sure wptr hasn't changed while processing */
wptr = cik_get_ih_wptr(rdev);
if (wptr != rptr)
goto restart_ih;
return IRQ_HANDLED;
}

170
drivers/gpu/drm/radeon/cikd.h
View File

@ -178,8 +178,42 @@
#define HDP_MISC_CNTL 0x2F4C
#define HDP_FLUSH_INVALIDATE_CACHE (1 << 0)
#define IH_RB_CNTL 0x3e00
# define IH_RB_ENABLE (1 << 0)
# define IH_RB_SIZE(x) ((x) << 1) /* log2 */
# define IH_RB_FULL_DRAIN_ENABLE (1 << 6)
# define IH_WPTR_WRITEBACK_ENABLE (1 << 8)
# define IH_WPTR_WRITEBACK_TIMER(x) ((x) << 9) /* log2 */
# define IH_WPTR_OVERFLOW_ENABLE (1 << 16)
# define IH_WPTR_OVERFLOW_CLEAR (1 << 31)
#define IH_RB_BASE 0x3e04
#define IH_RB_RPTR 0x3e08
#define IH_RB_WPTR 0x3e0c
# define RB_OVERFLOW (1 << 0)
# define WPTR_OFFSET_MASK 0x3fffc
#define IH_RB_WPTR_ADDR_HI 0x3e10
#define IH_RB_WPTR_ADDR_LO 0x3e14
#define IH_CNTL 0x3e18
# define ENABLE_INTR (1 << 0)
# define IH_MC_SWAP(x) ((x) << 1)
# define IH_MC_SWAP_NONE 0
# define IH_MC_SWAP_16BIT 1
# define IH_MC_SWAP_32BIT 2
# define IH_MC_SWAP_64BIT 3
# define RPTR_REARM (1 << 4)
# define MC_WRREQ_CREDIT(x) ((x) << 15)
# define MC_WR_CLEAN_CNT(x) ((x) << 20)
# define MC_VMID(x) ((x) << 25)
#define CONFIG_MEMSIZE 0x5428
#define INTERRUPT_CNTL 0x5468
# define IH_DUMMY_RD_OVERRIDE (1 << 0)
# define IH_DUMMY_RD_EN (1 << 1)
# define IH_REQ_NONSNOOP_EN (1 << 3)
# define GEN_IH_INT_EN (1 << 8)
#define INTERRUPT_CNTL2 0x546c
#define HDP_MEM_COHERENCY_FLUSH_CNTL 0x5480
#define BIF_FB_EN 0x5490
@ -203,6 +237,99 @@
#define SDMA0 (1 << 10)
#define SDMA1 (1 << 11)
/* 0x6b24, 0x7724, 0x10324, 0x10f24, 0x11b24, 0x12724 */
#define LB_VLINE_STATUS 0x6b24
# define VLINE_OCCURRED (1 << 0)
# define VLINE_ACK (1 << 4)
# define VLINE_STAT (1 << 12)
# define VLINE_INTERRUPT (1 << 16)
# define VLINE_INTERRUPT_TYPE (1 << 17)
/* 0x6b2c, 0x772c, 0x1032c, 0x10f2c, 0x11b2c, 0x1272c */
#define LB_VBLANK_STATUS 0x6b2c
# define VBLANK_OCCURRED (1 << 0)
# define VBLANK_ACK (1 << 4)
# define VBLANK_STAT (1 << 12)
# define VBLANK_INTERRUPT (1 << 16)
# define VBLANK_INTERRUPT_TYPE (1 << 17)
/* 0x6b20, 0x7720, 0x10320, 0x10f20, 0x11b20, 0x12720 */
#define LB_INTERRUPT_MASK 0x6b20
# define VBLANK_INTERRUPT_MASK (1 << 0)
# define VLINE_INTERRUPT_MASK (1 << 4)
# define VLINE2_INTERRUPT_MASK (1 << 8)
#define DISP_INTERRUPT_STATUS 0x60f4
# define LB_D1_VLINE_INTERRUPT (1 << 2)
# define LB_D1_VBLANK_INTERRUPT (1 << 3)
# define DC_HPD1_INTERRUPT (1 << 17)
# define DC_HPD1_RX_INTERRUPT (1 << 18)
# define DACA_AUTODETECT_INTERRUPT (1 << 22)
# define DACB_AUTODETECT_INTERRUPT (1 << 23)
# define DC_I2C_SW_DONE_INTERRUPT (1 << 24)
# define DC_I2C_HW_DONE_INTERRUPT (1 << 25)
#define DISP_INTERRUPT_STATUS_CONTINUE 0x60f8
# define LB_D2_VLINE_INTERRUPT (1 << 2)
# define LB_D2_VBLANK_INTERRUPT (1 << 3)
# define DC_HPD2_INTERRUPT (1 << 17)
# define DC_HPD2_RX_INTERRUPT (1 << 18)
# define DISP_TIMER_INTERRUPT (1 << 24)
#define DISP_INTERRUPT_STATUS_CONTINUE2 0x60fc
# define LB_D3_VLINE_INTERRUPT (1 << 2)
# define LB_D3_VBLANK_INTERRUPT (1 << 3)
# define DC_HPD3_INTERRUPT (1 << 17)
# define DC_HPD3_RX_INTERRUPT (1 << 18)
#define DISP_INTERRUPT_STATUS_CONTINUE3 0x6100
# define LB_D4_VLINE_INTERRUPT (1 << 2)
# define LB_D4_VBLANK_INTERRUPT (1 << 3)
# define DC_HPD4_INTERRUPT (1 << 17)
# define DC_HPD4_RX_INTERRUPT (1 << 18)
#define DISP_INTERRUPT_STATUS_CONTINUE4 0x614c
# define LB_D5_VLINE_INTERRUPT (1 << 2)
# define LB_D5_VBLANK_INTERRUPT (1 << 3)
# define DC_HPD5_INTERRUPT (1 << 17)
# define DC_HPD5_RX_INTERRUPT (1 << 18)
#define DISP_INTERRUPT_STATUS_CONTINUE5 0x6150
# define LB_D6_VLINE_INTERRUPT (1 << 2)
# define LB_D6_VBLANK_INTERRUPT (1 << 3)
# define DC_HPD6_INTERRUPT (1 << 17)
# define DC_HPD6_RX_INTERRUPT (1 << 18)
#define DISP_INTERRUPT_STATUS_CONTINUE6 0x6780
#define DAC_AUTODETECT_INT_CONTROL 0x67c8
#define DC_HPD1_INT_STATUS 0x601c
#define DC_HPD2_INT_STATUS 0x6028
#define DC_HPD3_INT_STATUS 0x6034
#define DC_HPD4_INT_STATUS 0x6040
#define DC_HPD5_INT_STATUS 0x604c
#define DC_HPD6_INT_STATUS 0x6058
# define DC_HPDx_INT_STATUS (1 << 0)
# define DC_HPDx_SENSE (1 << 1)
# define DC_HPDx_SENSE_DELAYED (1 << 4)
# define DC_HPDx_RX_INT_STATUS (1 << 8)
#define DC_HPD1_INT_CONTROL 0x6020
#define DC_HPD2_INT_CONTROL 0x602c
#define DC_HPD3_INT_CONTROL 0x6038
#define DC_HPD4_INT_CONTROL 0x6044
#define DC_HPD5_INT_CONTROL 0x6050
#define DC_HPD6_INT_CONTROL 0x605c
# define DC_HPDx_INT_ACK (1 << 0)
# define DC_HPDx_INT_POLARITY (1 << 8)
# define DC_HPDx_INT_EN (1 << 16)
# define DC_HPDx_RX_INT_ACK (1 << 20)
# define DC_HPDx_RX_INT_EN (1 << 24)
#define DC_HPD1_CONTROL 0x6024
#define DC_HPD2_CONTROL 0x6030
#define DC_HPD3_CONTROL 0x603c
#define DC_HPD4_CONTROL 0x6048
#define DC_HPD5_CONTROL 0x6054
#define DC_HPD6_CONTROL 0x6060
# define DC_HPDx_CONNECTION_TIMER(x) ((x) << 0)
# define DC_HPDx_RX_INT_TIMER(x) ((x) << 16)
# define DC_HPDx_EN (1 << 28)
#define GRBM_CNTL 0x8000
#define GRBM_READ_TIMEOUT(x) ((x) << 0)
@ -274,6 +401,10 @@
#define SOFT_RESET_CPC (1 << 18) /* CP Compute (MEC1/2) */
#define SOFT_RESET_CPG (1 << 19) /* CP GFX (PFP, ME, CE) */
#define GRBM_INT_CNTL 0x8060
# define RDERR_INT_ENABLE (1 << 0)
# define GUI_IDLE_INT_ENABLE (1 << 19)
#define CP_MEC_CNTL 0x8234
#define MEC_ME2_HALT (1 << 28)
#define MEC_ME1_HALT (1 << 30)
@ -507,6 +638,45 @@
# define CP_RINGID1_INT_ENABLE (1 << 30)
# define CP_RINGID0_INT_ENABLE (1 << 31)
#define CP_INT_STATUS_RING0 0xC1B4
# define PRIV_INSTR_INT_STAT (1 << 22)
# define PRIV_REG_INT_STAT (1 << 23)
# define TIME_STAMP_INT_STAT (1 << 26)
# define CP_RINGID2_INT_STAT (1 << 29)
# define CP_RINGID1_INT_STAT (1 << 30)
# define CP_RINGID0_INT_STAT (1 << 31)
#define CP_ME1_PIPE0_INT_CNTL 0xC214
#define CP_ME1_PIPE1_INT_CNTL 0xC218
#define CP_ME1_PIPE2_INT_CNTL 0xC21C
#define CP_ME1_PIPE3_INT_CNTL 0xC220
#define CP_ME2_PIPE0_INT_CNTL 0xC224
#define CP_ME2_PIPE1_INT_CNTL 0xC228
#define CP_ME2_PIPE2_INT_CNTL 0xC22C
#define CP_ME2_PIPE3_INT_CNTL 0xC230
# define DEQUEUE_REQUEST_INT_ENABLE (1 << 13)
# define WRM_POLL_TIMEOUT_INT_ENABLE (1 << 17)
# define PRIV_REG_INT_ENABLE (1 << 23)
# define TIME_STAMP_INT_ENABLE (1 << 26)
# define GENERIC2_INT_ENABLE (1 << 29)
# define GENERIC1_INT_ENABLE (1 << 30)
# define GENERIC0_INT_ENABLE (1 << 31)
#define CP_ME1_PIPE0_INT_STATUS 0xC214
#define CP_ME1_PIPE1_INT_STATUS 0xC218
#define CP_ME1_PIPE2_INT_STATUS 0xC21C
#define CP_ME1_PIPE3_INT_STATUS 0xC220
#define CP_ME2_PIPE0_INT_STATUS 0xC224
#define CP_ME2_PIPE1_INT_STATUS 0xC228
#define CP_ME2_PIPE2_INT_STATUS 0xC22C
#define CP_ME2_PIPE3_INT_STATUS 0xC230
# define DEQUEUE_REQUEST_INT_STATUS (1 << 13)
# define WRM_POLL_TIMEOUT_INT_STATUS (1 << 17)
# define PRIV_REG_INT_STATUS (1 << 23)
# define TIME_STAMP_INT_STATUS (1 << 26)
# define GENERIC2_INT_STATUS (1 << 29)
# define GENERIC1_INT_STATUS (1 << 30)
# define GENERIC0_INT_STATUS (1 << 31)
#define CP_MAX_CONTEXT 0xC2B8
#define CP_RB0_BASE_HI 0xC2C4

11
drivers/gpu/drm/radeon/radeon.h
View File

@ -600,10 +600,21 @@ struct evergreen_irq_stat_regs {
u32 afmt_status6;
};
struct cik_irq_stat_regs {
u32 disp_int;
u32 disp_int_cont;
u32 disp_int_cont2;
u32 disp_int_cont3;
u32 disp_int_cont4;
u32 disp_int_cont5;
u32 disp_int_cont6;
};
union radeon_irq_stat_regs {
struct r500_irq_stat_regs r500;
struct r600_irq_stat_regs r600;
struct evergreen_irq_stat_regs evergreen;
struct cik_irq_stat_regs cik;
};
#define RADEON_MAX_HPD_PINS 6