[AMD Official Use Only - General]
Shall we need to deal with the situation that no real gfx ring exist? (adev->gfx.num_gfx_rings is 0)
Regards,
Likun
-----Original Message-----
From: amd-gfx <amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of jiadong.zhu@xxxxxxx
Sent: Thursday, September 29, 2022 5:07 PM
To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Tuikov, Luben <Luben.Tuikov@xxxxxxx>; Michel Dänzer <michel@xxxxxxxxxxx>; Zhu, Jiadong <Jiadong.Zhu@xxxxxxx>; Koenig, Christian <Christian.Koenig@xxxxxxx>; Grodzovsky, Andrey <Andrey.Grodzovsky@xxxxxxx>
Subject: [PATCH 2/4] drm/amdgpu: Add software ring callbacks for gfx9 (v7)
From: "Jiadong.Zhu" <Jiadong.Zhu@xxxxxxx>
Set ring functions with software ring callbacks on gfx9.
The software ring could be tested by debugfs_test_ib case.
v2: Set sw_ring 2 to enable software ring by default.
v3: Remove the parameter for software ring enablement.
v4: Use amdgpu_ring_init/fini for software rings.
v5: Update for code format. Fix conflict.
v6: Remove unnecessary checks and enable software ring on gfx9 by default.
v7: Use static array for software ring names and priorities.
Acked-by: Luben Tuikov <luben.tuikov@xxxxxxx>
Cc: Christian Koenig <Christian.Koenig@xxxxxxx>
Cc: Luben Tuikov <Luben.Tuikov@xxxxxxx>
Cc: Andrey Grodzovsky <Andrey.Grodzovsky@xxxxxxx>
Cc: Michel Dänzer <michel@xxxxxxxxxxx>
Signed-off-by: Jiadong.Zhu <Jiadong.Zhu@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h | 1 +
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h | 1 +
drivers/gpu/drm/amd/amdgpu/amdgpu_ring_mux.c | 20 ++++
drivers/gpu/drm/amd/amdgpu/amdgpu_ring_mux.h | 2 +
drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 104 ++++++++++++++++++-
5 files changed, 127 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h
index 9996dadb39f7..4fdfc3ec134a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h
@@ -348,6 +348,7 @@ struct amdgpu_gfx {
bool is_poweron;
+ struct amdgpu_ring sw_gfx_ring[AMDGPU_MAX_SW_GFX_RINGS];
struct amdgpu_ring_mux muxer;
};
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
index 40b1277b4f0c..f08ee1ac281c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
@@ -39,6 +39,7 @@ struct amdgpu_vm;
#define AMDGPU_MAX_RINGS 28
#define AMDGPU_MAX_HWIP_RINGS 8
#define AMDGPU_MAX_GFX_RINGS 2
+#define AMDGPU_MAX_SW_GFX_RINGS 2
#define AMDGPU_MAX_COMPUTE_RINGS 8
#define AMDGPU_MAX_VCE_RINGS 3
#define AMDGPU_MAX_UVD_ENC_RINGS 2
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring_mux.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring_mux.c
index 43cab8a37754..2e64ffccc030 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring_mux.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring_mux.c
@@ -29,6 +29,14 @@
#define AMDGPU_MUX_RESUBMIT_JIFFIES_TIMEOUT (HZ / 2)
+static const struct ring_info {
+ unsigned int hw_pio;
+ const char *ring_name;
+} sw_ring_info[] = {
+ { AMDGPU_RING_PRIO_DEFAULT, "gfx_low"},
+ { AMDGPU_RING_PRIO_2, "gfx_high"},
+};
+
int amdgpu_ring_mux_init(struct amdgpu_ring_mux *mux, struct amdgpu_ring *ring,
unsigned int entry_size)
{
@@ -215,3 +223,15 @@ void amdgpu_sw_ring_insert_nop(struct amdgpu_ring *ring, uint32_t count) {
WARN_ON(!ring->is_sw_ring);
}
+
+const char *amdgpu_sw_ring_name(int idx) {
+ return idx < ARRAY_SIZE(sw_ring_info) ?
+ sw_ring_info[idx].ring_name : NULL;
+}
+
+unsigned int amdgpu_sw_ring_priority(int idx) {
+ return idx < ARRAY_SIZE(sw_ring_info) ?
+ sw_ring_info[idx].hw_pio : AMDGPU_RING_PRIO_DEFAULT; }
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring_mux.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring_mux.h
index d91629589577..28399f4b0e5c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring_mux.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring_mux.h
@@ -73,4 +73,6 @@ void amdgpu_sw_ring_insert_nop(struct amdgpu_ring *ring, uint32_t count); void amdgpu_sw_ring_ib_begin(struct amdgpu_ring *ring); void amdgpu_sw_ring_ib_end(struct amdgpu_ring *ring);
+const char *amdgpu_sw_ring_name(int idx); unsigned int
+amdgpu_sw_ring_priority(int idx);
#endif
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index 6b609f33261f..3b607c09d267 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -47,6 +47,7 @@
#include "amdgpu_ras.h"
+#include "amdgpu_ring_mux.h"
#include "gfx_v9_4.h"
#include "gfx_v9_0.h"
#include "gfx_v9_4_2.h"
@@ -56,6 +57,7 @@
#include "asic_reg/gc/gc_9_0_default.h"
#define GFX9_NUM_GFX_RINGS 1
+#define GFX9_NUM_SW_GFX_RINGS 2
#define GFX9_MEC_HPD_SIZE 4096
#define RLCG_UCODE_LOADING_START_ADDRESS 0x00002000L #define RLC_SAVE_RESTORE_ADDR_STARTING_OFFSET 0x00000000L @@ -2273,6 +2275,7 @@ static int gfx_v9_0_sw_init(void *handle)
struct amdgpu_ring *ring;
struct amdgpu_kiq *kiq;
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+ unsigned int hw_prio;
switch (adev->ip_versions[GC_HWIP][0]) {
case IP_VERSION(9, 0, 1):
@@ -2356,6 +2359,9 @@ static int gfx_v9_0_sw_init(void *handle)
sprintf(ring->name, "gfx_%d", i);
ring->use_doorbell = true;
ring->doorbell_index = adev->doorbell_index.gfx_ring0 << 1;
+
+ /* disable scheduler on the real ring */
+ ring->no_scheduler = true;
r = amdgpu_ring_init(adev, ring, 1024, &adev->gfx.eop_irq,
AMDGPU_CP_IRQ_GFX_ME0_PIPE0_EOP,
AMDGPU_RING_PRIO_DEFAULT, NULL); @@ -2363,6 +2369,38 @@ static int gfx_v9_0_sw_init(void *handle)
return r;
}
+ /* set up the software rings */
+ for (i = 0; i < GFX9_NUM_SW_GFX_RINGS; i++) {
+ ring = &adev->gfx.sw_gfx_ring[i];
+ ring->ring_obj = NULL;
+ sprintf(ring->name, amdgpu_sw_ring_name(i));
+ ring->use_doorbell = true;
+ ring->doorbell_index = adev->doorbell_index.gfx_ring0 << 1;
+ ring->is_sw_ring = true;
+ hw_prio = amdgpu_sw_ring_priority(i);
+ r = amdgpu_ring_init(adev, ring, 1024, &adev->gfx.eop_irq,
+ AMDGPU_CP_IRQ_GFX_ME0_PIPE0_EOP, hw_prio,
+ NULL);
+ if (r)
+ return r;
+ ring->wptr = 0;
+ }
+
+ /* init the muxer and add software rings */
+ r = amdgpu_ring_mux_init(&adev->gfx.muxer, &adev->gfx.gfx_ring[0],
+ GFX9_NUM_SW_GFX_RINGS);
+ if (r) {
+ DRM_ERROR("amdgpu_ring_mux_init failed(%d)\n", r);
+ return r;
+ }
+ for (i = 0; i < GFX9_NUM_SW_GFX_RINGS; i++) {
+ r = amdgpu_ring_mux_add_sw_ring(&adev->gfx.muxer, &adev->gfx.sw_gfx_ring[i]);
+ if (r) {
+ DRM_ERROR("amdgpu_ring_mux_add_sw_ring failed(%d)\n", r);
+ return r;
+ }
+ }
+
/* set up the compute queues - allocate horizontally across pipes */
ring_id = 0;
for (i = 0; i < adev->gfx.mec.num_mec; ++i) { @@ -2413,6 +2451,10 @@ static int gfx_v9_0_sw_fini(void *handle)
int i;
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+ for (i = 0; i < GFX9_NUM_SW_GFX_RINGS; i++)
+ amdgpu_ring_fini(&adev->gfx.sw_gfx_ring[i]);
+ amdgpu_ring_mux_fini(&adev->gfx.muxer);
+
for (i = 0; i < adev->gfx.num_gfx_rings; i++)
amdgpu_ring_fini(&adev->gfx.gfx_ring[i]);
for (i = 0; i < adev->gfx.num_compute_rings; i++) @@ -5877,7 +5919,9 @@ static int gfx_v9_0_eop_irq(struct amdgpu_device *adev,
switch (me_id) {
case 0:
- amdgpu_fence_process(&adev->gfx.gfx_ring[0]);
+ /* Fence signals are handled on the software rings*/
+ for (i = 0; i < GFX9_NUM_SW_GFX_RINGS; i++)
+ amdgpu_fence_process(&adev->gfx.sw_gfx_ring[i]);
break;
case 1:
case 2:
@@ -6882,6 +6926,61 @@ static const struct amdgpu_ring_funcs gfx_v9_0_ring_funcs_gfx = {
.emit_mem_sync = gfx_v9_0_emit_mem_sync, };
+static const struct amdgpu_ring_funcs gfx_v9_0_sw_ring_funcs_gfx = {
+ .type = AMDGPU_RING_TYPE_GFX,
+ .align_mask = 0xff,
+ .nop = PACKET3(PACKET3_NOP, 0x3FFF),
+ .support_64bit_ptrs = true,
+ .secure_submission_supported = true,
+ .vmhub = AMDGPU_GFXHUB_0,
+ .get_rptr = amdgpu_sw_ring_get_rptr_gfx,
+ .get_wptr = amdgpu_sw_ring_get_wptr_gfx,
+ .set_wptr = amdgpu_sw_ring_set_wptr_gfx,
+ .emit_frame_size = /* totally 242 maximum if 16 IBs */
+ 5 + /* COND_EXEC */
+ 7 + /* PIPELINE_SYNC */
+ SOC15_FLUSH_GPU_TLB_NUM_WREG * 5 +
+ SOC15_FLUSH_GPU_TLB_NUM_REG_WAIT * 7 +
+ 2 + /* VM_FLUSH */
+ 8 + /* FENCE for VM_FLUSH */
+ 20 + /* GDS switch */
+ 4 + /* double SWITCH_BUFFER,
+ * the first COND_EXEC jump to the place just
+ * prior to this double SWITCH_BUFFER
+ */
+ 5 + /* COND_EXEC */
+ 7 + /* HDP_flush */
+ 4 + /* VGT_flush */
+ 14 + /* CE_META */
+ 31 + /* DE_META */
+ 3 + /* CNTX_CTRL */
+ 5 + /* HDP_INVL */
+ 8 + 8 + /* FENCE x2 */
+ 2 + /* SWITCH_BUFFER */
+ 7, /* gfx_v9_0_emit_mem_sync */
+ .emit_ib_size = 4, /* gfx_v9_0_ring_emit_ib_gfx */
+ .emit_ib = gfx_v9_0_ring_emit_ib_gfx,
+ .emit_fence = gfx_v9_0_ring_emit_fence,
+ .emit_pipeline_sync = gfx_v9_0_ring_emit_pipeline_sync,
+ .emit_vm_flush = gfx_v9_0_ring_emit_vm_flush,
+ .emit_gds_switch = gfx_v9_0_ring_emit_gds_switch,
+ .emit_hdp_flush = gfx_v9_0_ring_emit_hdp_flush,
+ .test_ring = gfx_v9_0_ring_test_ring,
+ .test_ib = gfx_v9_0_ring_test_ib,
+ .insert_nop = amdgpu_sw_ring_insert_nop,
+ .pad_ib = amdgpu_ring_generic_pad_ib,
+ .emit_switch_buffer = gfx_v9_ring_emit_sb,
+ .emit_cntxcntl = gfx_v9_ring_emit_cntxcntl,
+ .init_cond_exec = gfx_v9_0_ring_emit_init_cond_exec,
+ .patch_cond_exec = gfx_v9_0_ring_emit_patch_cond_exec,
+ .emit_frame_cntl = gfx_v9_0_ring_emit_frame_cntl,
+ .emit_wreg = gfx_v9_0_ring_emit_wreg,
+ .emit_reg_wait = gfx_v9_0_ring_emit_reg_wait,
+ .emit_reg_write_reg_wait = gfx_v9_0_ring_emit_reg_write_reg_wait,
+ .soft_recovery = gfx_v9_0_ring_soft_recovery,
+ .emit_mem_sync = gfx_v9_0_emit_mem_sync, };
+
static const struct amdgpu_ring_funcs gfx_v9_0_ring_funcs_compute = {
.type = AMDGPU_RING_TYPE_COMPUTE,
.align_mask = 0xff,
@@ -6959,6 +7058,9 @@ static void gfx_v9_0_set_ring_funcs(struct amdgpu_device *adev)
for (i = 0; i < adev->gfx.num_gfx_rings; i++)
adev->gfx.gfx_ring[i].funcs = &gfx_v9_0_ring_funcs_gfx;
+ for (i = 0; i < GFX9_NUM_SW_GFX_RINGS; i++)
+ adev->gfx.sw_gfx_ring[i].funcs = &gfx_v9_0_sw_ring_funcs_gfx;
+
for (i = 0; i < adev->gfx.num_compute_rings; i++)
adev->gfx.compute_ring[i].funcs = &gfx_v9_0_ring_funcs_compute; }
--
2.25.1
