/*
* Copyright 2010 Advanced Micro Devices , Inc .
*
* 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 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
* THE COPYRIGHT HOLDER ( S ) OR AUTHOR ( S ) 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 : Alex Deucher
*/
#include "radeon.h"
#include "radeon_asic.h"
#include "radeon_trace.h"
#include "ni.h"
#include "nid.h"
/*
* DMA
* Starting with R600 , the GPU has an asynchronous
* DMA engine . The programming model is very similar
* to the 3 D engine ( ring buffer , IBs , etc . ) , but the
* DMA controller has it ' s own packet format that is
* different form the PM4 format used by the 3 D engine .
* It supports copying data , writing embedded data ,
* solid fills , and a number of other things . It also
* has support for tiling / detiling of buffers .
* Cayman and newer support two asynchronous DMA engines .
*/
/**
* cayman_dma_get_rptr - get the current read pointer
*
* @ rdev : radeon_device pointer
* @ ring : radeon ring pointer
*
* Get the current rptr from the hardware ( cayman + ) .
*/
uint32_t cayman_dma_get_rptr(struct radeon_device *rdev,
struct radeon_ring *ring)
{
u32 rptr, reg;
if (rdev->wb.enabled) {
rptr = rdev->wb.wb[ring->rptr_offs/4 ];
} else {
if (ring->idx == R600_RING_TYPE_DMA_INDEX)
reg = DMA_RB_RPTR + DMA0_REGISTER_OFFSET;
else
reg = DMA_RB_RPTR + DMA1_REGISTER_OFFSET;
rptr = RREG32(reg);
}
return (rptr & 0 x3fffc) >> 2 ;
}
/**
* cayman_dma_get_wptr - get the current write pointer
*
* @ rdev : radeon_device pointer
* @ ring : radeon ring pointer
*
* Get the current wptr from the hardware ( cayman + ) .
*/
uint32_t cayman_dma_get_wptr(struct radeon_device *rdev,
struct radeon_ring *ring)
{
u32 reg;
if (ring->idx == R600_RING_TYPE_DMA_INDEX)
reg = DMA_RB_WPTR + DMA0_REGISTER_OFFSET;
else
reg = DMA_RB_WPTR + DMA1_REGISTER_OFFSET;
return (RREG32(reg) & 0 x3fffc) >> 2 ;
}
/**
* cayman_dma_set_wptr - commit the write pointer
*
* @ rdev : radeon_device pointer
* @ ring : radeon ring pointer
*
* Write the wptr back to the hardware ( cayman + ) .
*/
void cayman_dma_set_wptr(struct radeon_device *rdev,
struct radeon_ring *ring)
{
u32 reg;
if (ring->idx == R600_RING_TYPE_DMA_INDEX)
reg = DMA_RB_WPTR + DMA0_REGISTER_OFFSET;
else
reg = DMA_RB_WPTR + DMA1_REGISTER_OFFSET;
WREG32(reg, (ring->wptr << 2 ) & 0 x3fffc);
}
/**
* cayman_dma_ring_ib_execute - Schedule an IB on the DMA engine
*
* @ rdev : radeon_device pointer
* @ ib : IB object to schedule
*
* Schedule an IB in the DMA ring ( cayman - SI ) .
*/
void cayman_dma_ring_ib_execute(struct radeon_device *rdev,
struct radeon_ib *ib)
{
struct radeon_ring *ring = &rdev->ring[ib->ring];
unsigned vm_id = ib->vm ? ib->vm->ids[ib->ring].id : 0 ;
if (rdev->wb.enabled) {
u32 next_rptr = ring->wptr + 4 ;
while ((next_rptr & 7 ) != 5 )
next_rptr++;
next_rptr += 3 ;
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_WRITE, 0 , 0 , 1 ));
radeon_ring_write(ring, ring->next_rptr_gpu_addr & 0 xfffffffc);
radeon_ring_write(ring, upper_32_bits(ring->next_rptr_gpu_addr) & 0 xff);
radeon_ring_write(ring, next_rptr);
}
/* The indirect buffer packet must end on an 8 DW boundary in the DMA ring.
* Pad as necessary with NOPs .
*/
while ((ring->wptr & 7 ) != 5 )
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_NOP, 0 , 0 , 0 ));
radeon_ring_write(ring, DMA_IB_PACKET(DMA_PACKET_INDIRECT_BUFFER, vm_id, 0 ));
radeon_ring_write(ring, (ib->gpu_addr & 0 xFFFFFFE0));
radeon_ring_write(ring, (ib->length_dw << 12 ) | (upper_32_bits(ib->gpu_addr) & 0 xFF));
}
/**
* cayman_dma_stop - stop the async dma engines
*
* @ rdev : radeon_device pointer
*
* Stop the async dma engines ( cayman - SI ) .
*/
void cayman_dma_stop(struct radeon_device *rdev)
{
u32 rb_cntl;
if ((rdev->asic->copy.copy_ring_index == R600_RING_TYPE_DMA_INDEX) ||
(rdev->asic->copy.copy_ring_index == CAYMAN_RING_TYPE_DMA1_INDEX))
radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size);
/* dma0 */
rb_cntl = RREG32(DMA_RB_CNTL + DMA0_REGISTER_OFFSET);
rb_cntl &= ~DMA_RB_ENABLE;
WREG32(DMA_RB_CNTL + DMA0_REGISTER_OFFSET, rb_cntl);
/* dma1 */
rb_cntl = RREG32(DMA_RB_CNTL + DMA1_REGISTER_OFFSET);
rb_cntl &= ~DMA_RB_ENABLE;
WREG32(DMA_RB_CNTL + DMA1_REGISTER_OFFSET, rb_cntl);
rdev->ring[R600_RING_TYPE_DMA_INDEX].ready = false ;
rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX].ready = false ;
}
/**
* cayman_dma_resume - setup and start the async dma engines
*
* @ rdev : radeon_device pointer
*
* Set up the DMA ring buffers and enable them . ( cayman - SI ) .
* Returns 0 for success , error for failure .
*/
int cayman_dma_resume(struct radeon_device *rdev)
{
struct radeon_ring *ring;
u32 rb_cntl, dma_cntl, ib_cntl;
u32 rb_bufsz;
u32 reg_offset, wb_offset;
int i, r;
for (i = 0 ; i < 2 ; i++) {
if (i == 0 ) {
ring = &rdev->ring[R600_RING_TYPE_DMA_INDEX];
reg_offset = DMA0_REGISTER_OFFSET;
wb_offset = R600_WB_DMA_RPTR_OFFSET;
} else {
ring = &rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX];
reg_offset = DMA1_REGISTER_OFFSET;
wb_offset = CAYMAN_WB_DMA1_RPTR_OFFSET;
}
WREG32(DMA_SEM_INCOMPLETE_TIMER_CNTL + reg_offset, 0 );
WREG32(DMA_SEM_WAIT_FAIL_TIMER_CNTL + reg_offset, 0 );
/* Set ring buffer size in dwords */
rb_bufsz = order_base_2(ring->ring_size / 4 );
rb_cntl = rb_bufsz << 1 ;
#ifdef __BIG_ENDIAN
rb_cntl |= DMA_RB_SWAP_ENABLE | DMA_RPTR_WRITEBACK_SWAP_ENABLE;
#endif
WREG32(DMA_RB_CNTL + reg_offset, rb_cntl);
/* Initialize the ring buffer's read and write pointers */
WREG32(DMA_RB_RPTR + reg_offset, 0 );
WREG32(DMA_RB_WPTR + reg_offset, 0 );
/* set the wb address whether it's enabled or not */
WREG32(DMA_RB_RPTR_ADDR_HI + reg_offset,
upper_32_bits(rdev->wb.gpu_addr + wb_offset) & 0 xFF);
WREG32(DMA_RB_RPTR_ADDR_LO + reg_offset,
((rdev->wb.gpu_addr + wb_offset) & 0 xFFFFFFFC));
if (rdev->wb.enabled)
rb_cntl |= DMA_RPTR_WRITEBACK_ENABLE;
WREG32(DMA_RB_BASE + reg_offset, ring->gpu_addr >> 8 );
/* enable DMA IBs */
ib_cntl = DMA_IB_ENABLE | CMD_VMID_FORCE;
#ifdef __BIG_ENDIAN
ib_cntl |= DMA_IB_SWAP_ENABLE;
#endif
WREG32(DMA_IB_CNTL + reg_offset, ib_cntl);
dma_cntl = RREG32(DMA_CNTL + reg_offset);
dma_cntl &= ~CTXEMPTY_INT_ENABLE;
WREG32(DMA_CNTL + reg_offset, dma_cntl);
ring->wptr = 0 ;
WREG32(DMA_RB_WPTR + reg_offset, ring->wptr << 2 );
WREG32(DMA_RB_CNTL + reg_offset, rb_cntl | DMA_RB_ENABLE);
ring->ready = true ;
r = radeon_ring_test(rdev, ring->idx, ring);
if (r) {
ring->ready = false ;
return r;
}
}
if ((rdev->asic->copy.copy_ring_index == R600_RING_TYPE_DMA_INDEX) ||
(rdev->asic->copy.copy_ring_index == CAYMAN_RING_TYPE_DMA1_INDEX))
radeon_ttm_set_active_vram_size(rdev, rdev->mc.real_vram_size);
return 0 ;
}
/**
* cayman_dma_fini - tear down the async dma engines
*
* @ rdev : radeon_device pointer
*
* Stop the async dma engines and free the rings ( cayman - SI ) .
*/
void cayman_dma_fini(struct radeon_device *rdev)
{
cayman_dma_stop(rdev);
radeon_ring_fini(rdev, &rdev->ring[R600_RING_TYPE_DMA_INDEX]);
radeon_ring_fini(rdev, &rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX]);
}
/**
* cayman_dma_is_lockup - Check if the DMA engine is locked up
*
* @ rdev : radeon_device pointer
* @ ring : radeon_ring structure holding ring information
*
* Check if the async DMA engine is locked up .
* Returns true if the engine appears to be locked up , false if not .
*/
bool cayman_dma_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
{
u32 reset_mask = cayman_gpu_check_soft_reset(rdev);
u32 mask;
if (ring->idx == R600_RING_TYPE_DMA_INDEX)
mask = RADEON_RESET_DMA;
else
mask = RADEON_RESET_DMA1;
if (!(reset_mask & mask)) {
radeon_ring_lockup_update(rdev, ring);
return false ;
}
return radeon_ring_test_lockup(rdev, ring);
}
/**
* cayman_dma_vm_copy_pages - update PTEs by copying them from the GART
*
* @ rdev : radeon_device pointer
* @ ib : indirect buffer to fill with commands
* @ pe : addr of the page entry
* @ src : src addr where to copy from
* @ count : number of page entries to update
*
* Update PTEs by copying them from the GART using the DMA ( cayman / TN ) .
*/
void cayman_dma_vm_copy_pages(struct radeon_device *rdev,
struct radeon_ib *ib,
uint64_t pe, uint64_t src,
unsigned count)
{
unsigned ndw;
while (count) {
ndw = count * 2 ;
if (ndw > 0 xFFFFE)
ndw = 0 xFFFFE;
ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_COPY,
0 , 0 , ndw);
ib->ptr[ib->length_dw++] = lower_32_bits(pe);
ib->ptr[ib->length_dw++] = lower_32_bits(src);
ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0 xff;
ib->ptr[ib->length_dw++] = upper_32_bits(src) & 0 xff;
pe += ndw * 4 ;
src += ndw * 4 ;
count -= ndw / 2 ;
}
}
/**
* cayman_dma_vm_write_pages - update PTEs by writing them manually
*
* @ rdev : radeon_device pointer
* @ ib : indirect buffer to fill with commands
* @ pe : addr of the page entry
* @ addr : dst addr to write into pe
* @ count : number of page entries to update
* @ incr : increase next addr by incr bytes
* @ flags : hw access flags
*
* Update PTEs by writing them manually using the DMA ( cayman / TN ) .
*/
void cayman_dma_vm_write_pages(struct radeon_device *rdev,
struct radeon_ib *ib,
uint64_t pe,
uint64_t addr, unsigned count,
uint32_t incr, uint32_t flags)
{
uint64_t value;
unsigned ndw;
while (count) {
ndw = count * 2 ;
if (ndw > 0 xFFFFE)
ndw = 0 xFFFFE;
/* for non-physically contiguous pages (system) */
ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_WRITE,
0 , 0 , ndw);
ib->ptr[ib->length_dw++] = pe;
ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0 xff;
for (; ndw > 0 ; ndw -= 2 , --count, pe += 8 ) {
if (flags & R600_PTE_SYSTEM) {
value = radeon_vm_map_gart(rdev, addr);
} else if (flags & R600_PTE_VALID) {
value = addr;
} else {
value = 0 ;
}
addr += incr;
value |= flags;
ib->ptr[ib->length_dw++] = value;
ib->ptr[ib->length_dw++] = upper_32_bits(value);
}
}
}
/**
* cayman_dma_vm_set_pages - update the page tables using the DMA
*
* @ rdev : radeon_device pointer
* @ ib : indirect buffer to fill with commands
* @ pe : addr of the page entry
* @ addr : dst addr to write into pe
* @ count : number of page entries to update
* @ incr : increase next addr by incr bytes
* @ flags : hw access flags
*
* Update the page tables using the DMA ( cayman / TN ) .
*/
void cayman_dma_vm_set_pages(struct radeon_device *rdev,
struct radeon_ib *ib,
uint64_t pe,
uint64_t addr, unsigned count,
uint32_t incr, uint32_t flags)
{
uint64_t value;
unsigned ndw;
while (count) {
ndw = count * 2 ;
if (ndw > 0 xFFFFE)
ndw = 0 xFFFFE;
if (flags & R600_PTE_VALID)
value = addr;
else
value = 0 ;
/* for physically contiguous pages (vram) */
ib->ptr[ib->length_dw++] = DMA_PTE_PDE_PACKET(ndw);
ib->ptr[ib->length_dw++] = pe; /* dst addr */
ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0 xff;
ib->ptr[ib->length_dw++] = flags; /* mask */
ib->ptr[ib->length_dw++] = 0 ;
ib->ptr[ib->length_dw++] = value; /* value */
ib->ptr[ib->length_dw++] = upper_32_bits(value);
ib->ptr[ib->length_dw++] = incr; /* increment size */
ib->ptr[ib->length_dw++] = 0 ;
pe += ndw * 4 ;
addr += (ndw / 2 ) * incr;
count -= ndw / 2 ;
}
}
/**
* cayman_dma_vm_pad_ib - pad the IB to the required number of dw
*
* @ ib : indirect buffer to fill with padding
*
*/
void cayman_dma_vm_pad_ib(struct radeon_ib *ib)
{
while (ib->length_dw & 0 x7)
ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_NOP, 0 , 0 , 0 );
}
void cayman_dma_vm_flush(struct radeon_device *rdev, struct radeon_ring *ring,
unsigned vm_id, uint64_t pd_addr)
{
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0 , 0 , 0 ));
radeon_ring_write(ring, (0 xf << 16 ) | ((VM_CONTEXT0_PAGE_TABLE_BASE_ADDR + (vm_id << 2 )) >> 2 ));
radeon_ring_write(ring, pd_addr >> 12 );
/* flush hdp cache */
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0 , 0 , 0 ));
radeon_ring_write(ring, (0 xf << 16 ) | (HDP_MEM_COHERENCY_FLUSH_CNTL >> 2 ));
radeon_ring_write(ring, 1 );
/* bits 0-7 are the VM contexts0-7 */
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0 , 0 , 0 ));
radeon_ring_write(ring, (0 xf << 16 ) | (VM_INVALIDATE_REQUEST >> 2 ));
radeon_ring_write(ring, 1 << vm_id);
/* wait for invalidate to complete */
radeon_ring_write(ring, DMA_SRBM_READ_PACKET);
radeon_ring_write(ring, (0 xff << 20 ) | (VM_INVALIDATE_REQUEST >> 2 ));
radeon_ring_write(ring, 0 ); /* mask */
radeon_ring_write(ring, 0 ); /* value */
}
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