/*
* Copyright 2013 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 "si.h"
#include "sid.h"
/**
* si_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 si_dma_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
{
u32 reset_mask = si_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);
}
/**
* si_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 ( SI ) .
*/
void si_dma_vm_copy_pages(struct radeon_device *rdev,
struct radeon_ib *ib,
uint64_t pe, uint64_t src,
unsigned count)
{
while (count) {
unsigned bytes = count * 8 ;
if (bytes > 0 xFFFF8)
bytes = 0 xFFFF8;
ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_COPY,
1 , 0 , 0 , bytes);
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 += bytes;
src += bytes;
count -= bytes / 8 ;
}
}
/**
* si_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 : access flags
*
* Update PTEs by writing them manually using the DMA ( SI ) .
*/
void si_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 , 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);
}
}
}
/**
* si_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 : access flags
*
* Update the page tables using the DMA ( SI ) .
*/
void si_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 ;
}
}
void si_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 , 0 ));
if (vm_id < 8 ) {
radeon_ring_write(ring, (0 xf << 16 ) | ((VM_CONTEXT0_PAGE_TABLE_BASE_ADDR + (vm_id << 2 )) >> 2 ));
} else {
radeon_ring_write(ring, (0 xf << 16 ) | ((VM_CONTEXT8_PAGE_TABLE_BASE_ADDR + ((vm_id - 8 ) << 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 , 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 , 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_PACKET(DMA_PACKET_POLL_REG_MEM, 0 , 0 , 0 , 0 ));
radeon_ring_write(ring, VM_INVALIDATE_REQUEST);
radeon_ring_write(ring, 0 xff << 16 ); /* retry */
radeon_ring_write(ring, 1 << vm_id); /* mask */
radeon_ring_write(ring, 0 ); /* value */
radeon_ring_write(ring, (0 << 28 ) | 0 x20); /* func(always) | poll interval */
}
/**
* si_copy_dma - copy pages using the DMA engine
*
* @ rdev : radeon_device pointer
* @ src_offset : src GPU address
* @ dst_offset : dst GPU address
* @ num_gpu_pages : number of GPU pages to xfer
* @ resv : reservation object to sync to
*
* Copy GPU paging using the DMA engine ( SI ) .
* Used by the radeon ttm implementation to move pages if
* registered as the asic copy callback .
*/
struct radeon_fence *si_copy_dma(struct radeon_device *rdev,
uint64_t src_offset, uint64_t dst_offset,
unsigned num_gpu_pages,
struct dma_resv *resv)
{
struct radeon_fence *fence;
struct radeon_sync sync;
int ring_index = rdev->asic->copy.dma_ring_index;
struct radeon_ring *ring = &rdev->ring[ring_index];
u32 size_in_bytes, cur_size_in_bytes;
int i, num_loops;
int r = 0 ;
radeon_sync_create(&sync);
size_in_bytes = (num_gpu_pages << RADEON_GPU_PAGE_SHIFT);
num_loops = DIV_ROUND_UP(size_in_bytes, 0 xfffff);
r = radeon_ring_lock(rdev, ring, num_loops * 5 + 11 );
if (r) {
DRM_ERROR("radeon: moving bo (%d).\n" , r);
radeon_sync_free(rdev, &sync, NULL);
return ERR_PTR(r);
}
radeon_sync_resv(rdev, &sync, resv, false );
radeon_sync_rings(rdev, &sync, ring->idx);
for (i = 0 ; i < num_loops; i++) {
cur_size_in_bytes = size_in_bytes;
if (cur_size_in_bytes > 0 xFFFFF)
cur_size_in_bytes = 0 xFFFFF;
size_in_bytes -= cur_size_in_bytes;
radeon_ring_write(ring, DMA_PACKET(DMA_PACKET_COPY, 1 , 0 , 0 , cur_size_in_bytes));
radeon_ring_write(ring, lower_32_bits(dst_offset));
radeon_ring_write(ring, lower_32_bits(src_offset));
radeon_ring_write(ring, upper_32_bits(dst_offset) & 0 xff);
radeon_ring_write(ring, upper_32_bits(src_offset) & 0 xff);
src_offset += cur_size_in_bytes;
dst_offset += cur_size_in_bytes;
}
r = radeon_fence_emit(rdev, &fence, ring->idx);
if (r) {
radeon_ring_unlock_undo(rdev, ring);
radeon_sync_free(rdev, &sync, NULL);
return ERR_PTR(r);
}
radeon_ring_unlock_commit(rdev, ring, false );
radeon_sync_free(rdev, &sync, fence);
return fence;
}
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(vorverarbeitet am 2026-09-28)
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