/*
* Core functions
*/
-static u32 si_get_tile_pipe_to_backend_map(struct radeon_device *rdev,
- u32 num_tile_pipes,
- u32 num_backends_per_asic,
- u32 *backend_disable_mask_per_asic,
- u32 num_shader_engines)
-{
- u32 backend_map = 0;
- u32 enabled_backends_mask = 0;
- u32 enabled_backends_count = 0;
- u32 num_backends_per_se;
- u32 cur_pipe;
- u32 swizzle_pipe[SI_MAX_PIPES];
- u32 cur_backend = 0;
- u32 i;
- bool force_no_swizzle;
-
- /* force legal values */
- if (num_tile_pipes < 1)
- num_tile_pipes = 1;
- if (num_tile_pipes > rdev->config.si.max_tile_pipes)
- num_tile_pipes = rdev->config.si.max_tile_pipes;
- if (num_shader_engines < 1)
- num_shader_engines = 1;
- if (num_shader_engines > rdev->config.si.max_shader_engines)
- num_shader_engines = rdev->config.si.max_shader_engines;
- if (num_backends_per_asic < num_shader_engines)
- num_backends_per_asic = num_shader_engines;
- if (num_backends_per_asic > (rdev->config.si.max_backends_per_se * num_shader_engines))
- num_backends_per_asic = rdev->config.si.max_backends_per_se * num_shader_engines;
-
- /* make sure we have the same number of backends per se */
- num_backends_per_asic = ALIGN(num_backends_per_asic, num_shader_engines);
- /* set up the number of backends per se */
- num_backends_per_se = num_backends_per_asic / num_shader_engines;
- if (num_backends_per_se > rdev->config.si.max_backends_per_se) {
- num_backends_per_se = rdev->config.si.max_backends_per_se;
- num_backends_per_asic = num_backends_per_se * num_shader_engines;
- }
-
- /* create enable mask and count for enabled backends */
- for (i = 0; i < SI_MAX_BACKENDS; ++i) {
- if (((*backend_disable_mask_per_asic >> i) & 1) == 0) {
- enabled_backends_mask |= (1 << i);
- ++enabled_backends_count;
- }
- if (enabled_backends_count == num_backends_per_asic)
- break;
- }
-
- /* force the backends mask to match the current number of backends */
- if (enabled_backends_count != num_backends_per_asic) {
- u32 this_backend_enabled;
- u32 shader_engine;
- u32 backend_per_se;
-
- enabled_backends_mask = 0;
- enabled_backends_count = 0;
- *backend_disable_mask_per_asic = SI_MAX_BACKENDS_MASK;
- for (i = 0; i < SI_MAX_BACKENDS; ++i) {
- /* calc the current se */
- shader_engine = i / rdev->config.si.max_backends_per_se;
- /* calc the backend per se */
- backend_per_se = i % rdev->config.si.max_backends_per_se;
- /* default to not enabled */
- this_backend_enabled = 0;
- if ((shader_engine < num_shader_engines) &&
- (backend_per_se < num_backends_per_se))
- this_backend_enabled = 1;
- if (this_backend_enabled) {
- enabled_backends_mask |= (1 << i);
- *backend_disable_mask_per_asic &= ~(1 << i);
- ++enabled_backends_count;
- }
- }
- }
-
-
- memset((uint8_t *)&swizzle_pipe[0], 0, sizeof(u32) * SI_MAX_PIPES);
- switch (rdev->family) {
- case CHIP_TAHITI:
- case CHIP_PITCAIRN:
- case CHIP_VERDE:
- force_no_swizzle = true;
- break;
- default:
- force_no_swizzle = false;
- break;
- }
- if (force_no_swizzle) {
- bool last_backend_enabled = false;
-
- force_no_swizzle = false;
- for (i = 0; i < SI_MAX_BACKENDS; ++i) {
- if (((enabled_backends_mask >> i) & 1) == 1) {
- if (last_backend_enabled)
- force_no_swizzle = true;
- last_backend_enabled = true;
- } else
- last_backend_enabled = false;
- }
- }
-
- switch (num_tile_pipes) {
- case 1:
- case 3:
- case 5:
- case 7:
- DRM_ERROR("odd number of pipes!\n");
- break;
- case 2:
- swizzle_pipe[0] = 0;
- swizzle_pipe[1] = 1;
- break;
- case 4:
- if (force_no_swizzle) {
- swizzle_pipe[0] = 0;
- swizzle_pipe[1] = 1;
- swizzle_pipe[2] = 2;
- swizzle_pipe[3] = 3;
- } else {
- swizzle_pipe[0] = 0;
- swizzle_pipe[1] = 2;
- swizzle_pipe[2] = 1;
- swizzle_pipe[3] = 3;
- }
- break;
- case 6:
- if (force_no_swizzle) {
- swizzle_pipe[0] = 0;
- swizzle_pipe[1] = 1;
- swizzle_pipe[2] = 2;
- swizzle_pipe[3] = 3;
- swizzle_pipe[4] = 4;
- swizzle_pipe[5] = 5;
- } else {
- swizzle_pipe[0] = 0;
- swizzle_pipe[1] = 2;
- swizzle_pipe[2] = 4;
- swizzle_pipe[3] = 1;
- swizzle_pipe[4] = 3;
- swizzle_pipe[5] = 5;
- }
- break;
- case 8:
- if (force_no_swizzle) {
- swizzle_pipe[0] = 0;
- swizzle_pipe[1] = 1;
- swizzle_pipe[2] = 2;
- swizzle_pipe[3] = 3;
- swizzle_pipe[4] = 4;
- swizzle_pipe[5] = 5;
- swizzle_pipe[6] = 6;
- swizzle_pipe[7] = 7;
- } else {
- swizzle_pipe[0] = 0;
- swizzle_pipe[1] = 2;
- swizzle_pipe[2] = 4;
- swizzle_pipe[3] = 6;
- swizzle_pipe[4] = 1;
- swizzle_pipe[5] = 3;
- swizzle_pipe[6] = 5;
- swizzle_pipe[7] = 7;
- }
- break;
- }
-
- for (cur_pipe = 0; cur_pipe < num_tile_pipes; ++cur_pipe) {
- while (((1 << cur_backend) & enabled_backends_mask) == 0)
- cur_backend = (cur_backend + 1) % SI_MAX_BACKENDS;
-
- backend_map |= (((cur_backend & 0xf) << (swizzle_pipe[cur_pipe] * 4)));
-
- cur_backend = (cur_backend + 1) % SI_MAX_BACKENDS;
- }
-
- return backend_map;
-}
-
-static u32 si_get_disable_mask_per_asic(struct radeon_device *rdev,
- u32 disable_mask_per_se,
- u32 max_disable_mask_per_se,
- u32 num_shader_engines)
-{
- u32 disable_field_width_per_se = r600_count_pipe_bits(disable_mask_per_se);
- u32 disable_mask_per_asic = disable_mask_per_se & max_disable_mask_per_se;
-
- if (num_shader_engines == 1)
- return disable_mask_per_asic;
- else if (num_shader_engines == 2)
- return disable_mask_per_asic | (disable_mask_per_asic << disable_field_width_per_se);
- else
- return 0xffffffff;
-}
-
static void si_tiling_mode_table_init(struct radeon_device *rdev)
{
const u32 num_tile_mode_states = 32;
DRM_ERROR("unknown asic: 0x%x\n", rdev->family);
}
+static void si_select_se_sh(struct radeon_device *rdev,
+ u32 se_num, u32 sh_num)
+{
+ u32 data = INSTANCE_BROADCAST_WRITES;
+
+ if ((se_num == 0xffffffff) && (sh_num == 0xffffffff))
+ data = SH_BROADCAST_WRITES | SE_BROADCAST_WRITES;
+ else if (se_num == 0xffffffff)
+ data |= SE_BROADCAST_WRITES | SH_INDEX(sh_num);
+ else if (sh_num == 0xffffffff)
+ data |= SH_BROADCAST_WRITES | SE_INDEX(se_num);
+ else
+ data |= SH_INDEX(sh_num) | SE_INDEX(se_num);
+ WREG32(GRBM_GFX_INDEX, data);
+}
+
+static u32 si_create_bitmask(u32 bit_width)
+{
+ u32 i, mask = 0;
+
+ for (i = 0; i < bit_width; i++) {
+ mask <<= 1;
+ mask |= 1;
+ }
+ return mask;
+}
+
+static u32 si_get_cu_enabled(struct radeon_device *rdev, u32 cu_per_sh)
+{
+ u32 data, mask;
+
+ data = RREG32(CC_GC_SHADER_ARRAY_CONFIG);
+ if (data & 1)
+ data &= INACTIVE_CUS_MASK;
+ else
+ data = 0;
+ data |= RREG32(GC_USER_SHADER_ARRAY_CONFIG);
+
+ data >>= INACTIVE_CUS_SHIFT;
+
+ mask = si_create_bitmask(cu_per_sh);
+
+ return ~data & mask;
+}
+
+static void si_setup_spi(struct radeon_device *rdev,
+ u32 se_num, u32 sh_per_se,
+ u32 cu_per_sh)
+{
+ int i, j, k;
+ u32 data, mask, active_cu;
+
+ for (i = 0; i < se_num; i++) {
+ for (j = 0; j < sh_per_se; j++) {
+ si_select_se_sh(rdev, i, j);
+ data = RREG32(SPI_STATIC_THREAD_MGMT_3);
+ active_cu = si_get_cu_enabled(rdev, cu_per_sh);
+
+ mask = 1;
+ for (k = 0; k < 16; k++) {
+ mask <<= k;
+ if (active_cu & mask) {
+ data &= ~mask;
+ WREG32(SPI_STATIC_THREAD_MGMT_3, data);
+ break;
+ }
+ }
+ }
+ }
+ si_select_se_sh(rdev, 0xffffffff, 0xffffffff);
+}
+
+static u32 si_get_rb_disabled(struct radeon_device *rdev,
+ u32 max_rb_num, u32 se_num,
+ u32 sh_per_se)
+{
+ u32 data, mask;
+
+ data = RREG32(CC_RB_BACKEND_DISABLE);
+ if (data & 1)
+ data &= BACKEND_DISABLE_MASK;
+ else
+ data = 0;
+ data |= RREG32(GC_USER_RB_BACKEND_DISABLE);
+
+ data >>= BACKEND_DISABLE_SHIFT;
+
+ mask = si_create_bitmask(max_rb_num / se_num / sh_per_se);
+
+ return data & mask;
+}
+
+static void si_setup_rb(struct radeon_device *rdev,
+ u32 se_num, u32 sh_per_se,
+ u32 max_rb_num)
+{
+ int i, j;
+ u32 data, mask;
+ u32 disabled_rbs = 0;
+ u32 enabled_rbs = 0;
+
+ for (i = 0; i < se_num; i++) {
+ for (j = 0; j < sh_per_se; j++) {
+ si_select_se_sh(rdev, i, j);
+ data = si_get_rb_disabled(rdev, max_rb_num, se_num, sh_per_se);
+ disabled_rbs |= data << ((i * sh_per_se + j) * TAHITI_RB_BITMAP_WIDTH_PER_SH);
+ }
+ }
+ si_select_se_sh(rdev, 0xffffffff, 0xffffffff);
+
+ mask = 1;
+ for (i = 0; i < max_rb_num; i++) {
+ if (!(disabled_rbs & mask))
+ enabled_rbs |= mask;
+ mask <<= 1;
+ }
+
+ for (i = 0; i < se_num; i++) {
+ si_select_se_sh(rdev, i, 0xffffffff);
+ data = 0;
+ for (j = 0; j < sh_per_se; j++) {
+ switch (enabled_rbs & 3) {
+ case 1:
+ data |= (RASTER_CONFIG_RB_MAP_0 << (i * sh_per_se + j) * 2);
+ break;
+ case 2:
+ data |= (RASTER_CONFIG_RB_MAP_3 << (i * sh_per_se + j) * 2);
+ break;
+ case 3:
+ default:
+ data |= (RASTER_CONFIG_RB_MAP_2 << (i * sh_per_se + j) * 2);
+ break;
+ }
+ enabled_rbs >>= 2;
+ }
+ WREG32(PA_SC_RASTER_CONFIG, data);
+ }
+ si_select_se_sh(rdev, 0xffffffff, 0xffffffff);
+}
+
static void si_gpu_init(struct radeon_device *rdev)
{
- u32 cc_rb_backend_disable = 0;
- u32 cc_gc_shader_array_config;
u32 gb_addr_config = 0;
u32 mc_shared_chmap, mc_arb_ramcfg;
- u32 gb_backend_map;
- u32 cgts_tcc_disable;
u32 sx_debug_1;
- u32 gc_user_shader_array_config;
- u32 gc_user_rb_backend_disable;
- u32 cgts_user_tcc_disable;
u32 hdp_host_path_cntl;
u32 tmp;
int i, j;
switch (rdev->family) {
case CHIP_TAHITI:
rdev->config.si.max_shader_engines = 2;
- rdev->config.si.max_pipes_per_simd = 4;
rdev->config.si.max_tile_pipes = 12;
- rdev->config.si.max_simds_per_se = 8;
+ rdev->config.si.max_cu_per_sh = 8;
+ rdev->config.si.max_sh_per_se = 2;
rdev->config.si.max_backends_per_se = 4;
rdev->config.si.max_texture_channel_caches = 12;
rdev->config.si.max_gprs = 256;
rdev->config.si.sc_prim_fifo_size_backend = 0x100;
rdev->config.si.sc_hiz_tile_fifo_size = 0x30;
rdev->config.si.sc_earlyz_tile_fifo_size = 0x130;
+ gb_addr_config = TAHITI_GB_ADDR_CONFIG_GOLDEN;
break;
case CHIP_PITCAIRN:
rdev->config.si.max_shader_engines = 2;
- rdev->config.si.max_pipes_per_simd = 4;
rdev->config.si.max_tile_pipes = 8;
- rdev->config.si.max_simds_per_se = 5;
+ rdev->config.si.max_cu_per_sh = 5;
+ rdev->config.si.max_sh_per_se = 2;
rdev->config.si.max_backends_per_se = 4;
rdev->config.si.max_texture_channel_caches = 8;
rdev->config.si.max_gprs = 256;
rdev->config.si.sc_prim_fifo_size_backend = 0x100;
rdev->config.si.sc_hiz_tile_fifo_size = 0x30;
rdev->config.si.sc_earlyz_tile_fifo_size = 0x130;
+ gb_addr_config = TAHITI_GB_ADDR_CONFIG_GOLDEN;
break;
case CHIP_VERDE:
default:
rdev->config.si.max_shader_engines = 1;
- rdev->config.si.max_pipes_per_simd = 4;
rdev->config.si.max_tile_pipes = 4;
- rdev->config.si.max_simds_per_se = 2;
+ rdev->config.si.max_cu_per_sh = 2;
+ rdev->config.si.max_sh_per_se = 2;
rdev->config.si.max_backends_per_se = 4;
rdev->config.si.max_texture_channel_caches = 4;
rdev->config.si.max_gprs = 256;
rdev->config.si.sc_prim_fifo_size_backend = 0x40;
rdev->config.si.sc_hiz_tile_fifo_size = 0x30;
rdev->config.si.sc_earlyz_tile_fifo_size = 0x130;
+ gb_addr_config = VERDE_GB_ADDR_CONFIG_GOLDEN;
break;
}
mc_shared_chmap = RREG32(MC_SHARED_CHMAP);
mc_arb_ramcfg = RREG32(MC_ARB_RAMCFG);
- cc_rb_backend_disable = RREG32(CC_RB_BACKEND_DISABLE);
- cc_gc_shader_array_config = RREG32(CC_GC_SHADER_ARRAY_CONFIG);
- cgts_tcc_disable = 0xffff0000;
- for (i = 0; i < rdev->config.si.max_texture_channel_caches; i++)
- cgts_tcc_disable &= ~(1 << (16 + i));
- gc_user_rb_backend_disable = RREG32(GC_USER_RB_BACKEND_DISABLE);
- gc_user_shader_array_config = RREG32(GC_USER_SHADER_ARRAY_CONFIG);
- cgts_user_tcc_disable = RREG32(CGTS_USER_TCC_DISABLE);
-
- rdev->config.si.num_shader_engines = rdev->config.si.max_shader_engines;
rdev->config.si.num_tile_pipes = rdev->config.si.max_tile_pipes;
- tmp = ((~gc_user_rb_backend_disable) & BACKEND_DISABLE_MASK) >> BACKEND_DISABLE_SHIFT;
- rdev->config.si.num_backends_per_se = r600_count_pipe_bits(tmp);
- tmp = (gc_user_rb_backend_disable & BACKEND_DISABLE_MASK) >> BACKEND_DISABLE_SHIFT;
- rdev->config.si.backend_disable_mask_per_asic =
- si_get_disable_mask_per_asic(rdev, tmp, SI_MAX_BACKENDS_PER_SE_MASK,
- rdev->config.si.num_shader_engines);
- rdev->config.si.backend_map =
- si_get_tile_pipe_to_backend_map(rdev, rdev->config.si.num_tile_pipes,
- rdev->config.si.num_backends_per_se *
- rdev->config.si.num_shader_engines,
- &rdev->config.si.backend_disable_mask_per_asic,
- rdev->config.si.num_shader_engines);
- tmp = ((~cgts_user_tcc_disable) & TCC_DISABLE_MASK) >> TCC_DISABLE_SHIFT;
- rdev->config.si.num_texture_channel_caches = r600_count_pipe_bits(tmp);
rdev->config.si.mem_max_burst_length_bytes = 256;
tmp = (mc_arb_ramcfg & NOOFCOLS_MASK) >> NOOFCOLS_SHIFT;
rdev->config.si.mem_row_size_in_kb = (4 * (1 << (8 + tmp))) / 1024;
rdev->config.si.num_gpus = 1;
rdev->config.si.multi_gpu_tile_size = 64;
- gb_addr_config = 0;
- switch (rdev->config.si.num_tile_pipes) {
- case 1:
- gb_addr_config |= NUM_PIPES(0);
- break;
- case 2:
- gb_addr_config |= NUM_PIPES(1);
- break;
- case 4:
- gb_addr_config |= NUM_PIPES(2);
- break;
- case 8:
- default:
- gb_addr_config |= NUM_PIPES(3);
- break;
- }
-
- tmp = (rdev->config.si.mem_max_burst_length_bytes / 256) - 1;
- gb_addr_config |= PIPE_INTERLEAVE_SIZE(tmp);
- gb_addr_config |= NUM_SHADER_ENGINES(rdev->config.si.num_shader_engines - 1);
- tmp = (rdev->config.si.shader_engine_tile_size / 16) - 1;
- gb_addr_config |= SHADER_ENGINE_TILE_SIZE(tmp);
- switch (rdev->config.si.num_gpus) {
- case 1:
- default:
- gb_addr_config |= NUM_GPUS(0);
- break;
- case 2:
- gb_addr_config |= NUM_GPUS(1);
- break;
- case 4:
- gb_addr_config |= NUM_GPUS(2);
- break;
- }
- switch (rdev->config.si.multi_gpu_tile_size) {
- case 16:
- gb_addr_config |= MULTI_GPU_TILE_SIZE(0);
- break;
- case 32:
- default:
- gb_addr_config |= MULTI_GPU_TILE_SIZE(1);
- break;
- case 64:
- gb_addr_config |= MULTI_GPU_TILE_SIZE(2);
- break;
- case 128:
- gb_addr_config |= MULTI_GPU_TILE_SIZE(3);
- break;
- }
+ /* fix up row size */
+ gb_addr_config &= ~ROW_SIZE_MASK;
switch (rdev->config.si.mem_row_size_in_kb) {
case 1:
default:
break;
}
- tmp = (gb_addr_config & NUM_PIPES_MASK) >> NUM_PIPES_SHIFT;
- rdev->config.si.num_tile_pipes = (1 << tmp);
- tmp = (gb_addr_config & PIPE_INTERLEAVE_SIZE_MASK) >> PIPE_INTERLEAVE_SIZE_SHIFT;
- rdev->config.si.mem_max_burst_length_bytes = (tmp + 1) * 256;
- tmp = (gb_addr_config & NUM_SHADER_ENGINES_MASK) >> NUM_SHADER_ENGINES_SHIFT;
- rdev->config.si.num_shader_engines = tmp + 1;
- tmp = (gb_addr_config & NUM_GPUS_MASK) >> NUM_GPUS_SHIFT;
- rdev->config.si.num_gpus = tmp + 1;
- tmp = (gb_addr_config & MULTI_GPU_TILE_SIZE_MASK) >> MULTI_GPU_TILE_SIZE_SHIFT;
- rdev->config.si.multi_gpu_tile_size = 1 << tmp;
- tmp = (gb_addr_config & ROW_SIZE_MASK) >> ROW_SIZE_SHIFT;
- rdev->config.si.mem_row_size_in_kb = 1 << tmp;
-
- gb_backend_map =
- si_get_tile_pipe_to_backend_map(rdev, rdev->config.si.num_tile_pipes,
- rdev->config.si.num_backends_per_se *
- rdev->config.si.num_shader_engines,
- &rdev->config.si.backend_disable_mask_per_asic,
- rdev->config.si.num_shader_engines);
-
/* setup tiling info dword. gb_addr_config is not adequate since it does
* not have bank info, so create a custom tiling dword.
* bits 3:0 num_pipes
rdev->config.si.tile_config |= (3 << 0);
break;
}
- rdev->config.si.tile_config |=
- ((mc_arb_ramcfg & NOOFBANK_MASK) >> NOOFBANK_SHIFT) << 4;
+ if ((mc_arb_ramcfg & NOOFBANK_MASK) >> NOOFBANK_SHIFT)
+ rdev->config.si.tile_config |= 1 << 4;
+ else
+ rdev->config.si.tile_config |= 0 << 4;
rdev->config.si.tile_config |=
((gb_addr_config & PIPE_INTERLEAVE_SIZE_MASK) >> PIPE_INTERLEAVE_SIZE_SHIFT) << 8;
rdev->config.si.tile_config |=
((gb_addr_config & ROW_SIZE_MASK) >> ROW_SIZE_SHIFT) << 12;
- rdev->config.si.backend_map = gb_backend_map;
WREG32(GB_ADDR_CONFIG, gb_addr_config);
WREG32(DMIF_ADDR_CONFIG, gb_addr_config);
WREG32(HDP_ADDR_CONFIG, gb_addr_config);
- /* primary versions */
- WREG32(CC_RB_BACKEND_DISABLE, cc_rb_backend_disable);
- WREG32(CC_SYS_RB_BACKEND_DISABLE, cc_rb_backend_disable);
- WREG32(CC_GC_SHADER_ARRAY_CONFIG, cc_gc_shader_array_config);
+ si_tiling_mode_table_init(rdev);
- WREG32(CGTS_TCC_DISABLE, cgts_tcc_disable);
+ si_setup_rb(rdev, rdev->config.si.max_shader_engines,
+ rdev->config.si.max_sh_per_se,
+ rdev->config.si.max_backends_per_se);
- /* user versions */
- WREG32(GC_USER_RB_BACKEND_DISABLE, cc_rb_backend_disable);
- WREG32(GC_USER_SYS_RB_BACKEND_DISABLE, cc_rb_backend_disable);
- WREG32(GC_USER_SHADER_ARRAY_CONFIG, cc_gc_shader_array_config);
+ si_setup_spi(rdev, rdev->config.si.max_shader_engines,
+ rdev->config.si.max_sh_per_se,
+ rdev->config.si.max_cu_per_sh);
- WREG32(CGTS_USER_TCC_DISABLE, cgts_tcc_disable);
-
- si_tiling_mode_table_init(rdev);
/* set HW defaults for 3D engine */
WREG32(CP_QUEUE_THRESHOLDS, (ROQ_IB1_START(0x16) |
*/
void si_ring_ib_execute(struct radeon_device *rdev, struct radeon_ib *ib)
{
- struct radeon_ring *ring = &rdev->ring[ib->fence->ring];
+ struct radeon_ring *ring = &rdev->ring[ib->ring];
u32 header;
if (ib->is_const_ib)
if (ib->is_const_ib)
ret = si_vm_packet3_ce_check(rdev, ib->ptr, &pkt);
else {
- switch (ib->fence->ring) {
+ switch (ib->ring) {
case RADEON_RING_TYPE_GFX_INDEX:
ret = si_vm_packet3_gfx_check(rdev, ib->ptr, &pkt);
break;
ret = si_vm_packet3_compute_check(rdev, ib->ptr, &pkt);
break;
default:
- dev_err(rdev->dev, "Non-PM4 ring %d !\n", ib->fence->ring);
+ dev_err(rdev->dev, "Non-PM4 ring %d !\n", ib->ring);
ret = -EINVAL;
break;
}
WREG32(IH_RB_RPTR, 0);
WREG32(IH_RB_WPTR, 0);
rdev->ih.enabled = false;
- rdev->ih.wptr = 0;
rdev->ih.rptr = 0;
}
u32 rptr;
u32 src_id, src_data, ring_id;
u32 ring_index;
- unsigned long flags;
bool queue_hotplug = false;
if (!rdev->ih.enabled || rdev->shutdown)
return IRQ_NONE;
wptr = si_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("si_irq_process start: rptr %d, wptr %d\n", rptr, wptr);
- spin_lock_irqsave(&rdev->ih.lock, flags);
- if (rptr == wptr) {
- spin_unlock_irqrestore(&rdev->ih.lock, flags);
- return IRQ_NONE;
- }
-restart_ih:
/* Order reading of wptr vs. reading of IH ring data */
rmb();
/* display interrupts */
si_irq_ack(rdev);
- rdev->ih.wptr = wptr;
while (rptr != wptr) {
/* wptr/rptr are in bytes! */
ring_index = rptr / 4;
rptr += 16;
rptr &= rdev->ih.ptr_mask;
}
- /* make sure wptr hasn't changed while processing */
- wptr = si_get_ih_wptr(rdev);
- if (wptr != rdev->ih.wptr)
- goto restart_ih;
if (queue_hotplug)
schedule_work(&rdev->hotplug_work);
rdev->ih.rptr = rptr;
WREG32(IH_RB_RPTR, rdev->ih.rptr);
- spin_unlock_irqrestore(&rdev->ih.lock, flags);
+ atomic_set(&rdev->ih.lock, 0);
+
+ /* make sure wptr hasn't changed while processing */
+ wptr = si_get_ih_wptr(rdev);
+ if (wptr != rptr)
+ goto restart_ih;
+
return IRQ_HANDLED;
}
projects / linux-2.6-block.git / blobdiff