drm/amdgpu/virt: impl mailbox for ai

Implement mailbox protocol for AI so that guest vf can communicate
with GPU hypervisor.

Signed-off-by: Xiangliang Yu <Xiangliang.Yu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Monk Liu <Monk.Liu@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
index 242265e..660786a 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/Makefile
+++ b/drivers/gpu/drm/amd/amdgpu/Makefile
@@ -34,7 +34,7 @@ amdgpu-$(CONFIG_DRM_AMDGPU_CIK)+= cik.o cik_ih.o kv_smc.o kv_dpm.o \
 amdgpu-$(CONFIG_DRM_AMDGPU_SI)+= si.o gmc_v6_0.o gfx_v6_0.o si_ih.o si_dma.o dce_v6_0.o si_dpm.o si_smc.o
 
 amdgpu-y += \
-       vi.o mxgpu_vi.o nbio_v6_1.o soc15.o
+       vi.o mxgpu_vi.o nbio_v6_1.o soc15.o mxgpu_ai.o
 
 # add GMC block
 amdgpu-y += \

diff --git a/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c b/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c
new file mode 100644 (file)
index 0000000..cfd5e54
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c
@@ -0,0 +1,207 @@
+/*
+ * Copyright 2014 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.
+ *
+ */
+
+#include "amdgpu.h"
+#include "vega10/soc15ip.h"
+#include "vega10/NBIO/nbio_6_1_offset.h"
+#include "vega10/NBIO/nbio_6_1_sh_mask.h"
+#include "vega10/GC/gc_9_0_offset.h"
+#include "vega10/GC/gc_9_0_sh_mask.h"
+#include "soc15.h"
+#include "soc15_common.h"
+#include "mxgpu_ai.h"
+
+static void xgpu_ai_mailbox_send_ack(struct amdgpu_device *adev)
+{
+       u32 reg;
+       int timeout = AI_MAILBOX_TIMEDOUT;
+       u32 mask = REG_FIELD_MASK(BIF_BX_PF0_MAILBOX_CONTROL, RCV_MSG_VALID);
+
+       reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
+                                            mmBIF_BX_PF0_MAILBOX_CONTROL));
+       reg = REG_SET_FIELD(reg, BIF_BX_PF0_MAILBOX_CONTROL, RCV_MSG_ACK, 1);
+       WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
+                                      mmBIF_BX_PF0_MAILBOX_CONTROL), reg);
+
+       /*Wait for RCV_MSG_VALID to be 0*/
+       reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
+                                            mmBIF_BX_PF0_MAILBOX_CONTROL));
+       while (reg & mask) {
+               if (timeout <= 0) {
+                       pr_err("RCV_MSG_VALID is not cleared\n");
+                       break;
+               }
+               mdelay(1);
+               timeout -=1;
+
+               reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
+                                                    mmBIF_BX_PF0_MAILBOX_CONTROL));
+       }
+}
+
+static void xgpu_ai_mailbox_set_valid(struct amdgpu_device *adev, bool val)
+{
+       u32 reg;
+
+       reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
+                                            mmBIF_BX_PF0_MAILBOX_CONTROL));
+       reg = REG_SET_FIELD(reg, BIF_BX_PF0_MAILBOX_CONTROL,
+                           TRN_MSG_VALID, val ? 1 : 0);
+       WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF0_MAILBOX_CONTROL),
+                     reg);
+}
+
+static void xgpu_ai_mailbox_trans_msg(struct amdgpu_device *adev,
+                                     enum idh_request req)
+{
+       u32 reg;
+
+       reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
+                                            mmBIF_BX_PF0_MAILBOX_MSGBUF_TRN_DW0));
+       reg = REG_SET_FIELD(reg, BIF_BX_PF0_MAILBOX_MSGBUF_TRN_DW0,
+                           MSGBUF_DATA, req);
+       WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF0_MAILBOX_MSGBUF_TRN_DW0),
+                     reg);
+
+       xgpu_ai_mailbox_set_valid(adev, true);
+}
+
+static int xgpu_ai_mailbox_rcv_msg(struct amdgpu_device *adev,
+                                  enum idh_event event)
+{
+       u32 reg;
+       u32 mask = REG_FIELD_MASK(BIF_BX_PF0_MAILBOX_CONTROL, RCV_MSG_VALID);
+
+       if (event != IDH_FLR_NOTIFICATION_CMPL) {
+               reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
+                                                    mmBIF_BX_PF0_MAILBOX_CONTROL));
+               if (!(reg & mask))
+                       return -ENOENT;
+       }
+
+       reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
+                                            mmBIF_BX_PF0_MAILBOX_MSGBUF_RCV_DW0));
+       if (reg != event)
+               return -ENOENT;
+
+       xgpu_ai_mailbox_send_ack(adev);
+
+       return 0;
+}
+
+static int xgpu_ai_poll_ack(struct amdgpu_device *adev)
+{
+       int r = 0, timeout = AI_MAILBOX_TIMEDOUT;
+       u32 mask = REG_FIELD_MASK(BIF_BX_PF0_MAILBOX_CONTROL, TRN_MSG_ACK);
+       u32 reg;
+
+       reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
+                                            mmBIF_BX_PF0_MAILBOX_CONTROL));
+       while (!(reg & mask)) {
+               if (timeout <= 0) {
+                       pr_err("Doesn't get ack from pf.\n");
+                       r = -ETIME;
+                       break;
+               }
+               msleep(1);
+               timeout -= 1;
+
+               reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
+                                                    mmBIF_BX_PF0_MAILBOX_CONTROL));
+       }
+
+       return r;
+}
+
+static int xgpu_vi_poll_msg(struct amdgpu_device *adev, enum idh_event event)
+{
+       int r = 0, timeout = AI_MAILBOX_TIMEDOUT;
+
+       r = xgpu_ai_mailbox_rcv_msg(adev, event);
+       while (r) {
+               if (timeout <= 0) {
+                       pr_err("Doesn't get ack from pf.\n");
+                       r = -ETIME;
+                       break;
+               }
+               msleep(1);
+               timeout -= 1;
+
+               r = xgpu_ai_mailbox_rcv_msg(adev, event);
+       }
+
+       return r;
+}
+
+
+static int xgpu_ai_send_access_requests(struct amdgpu_device *adev,
+                                       enum idh_request req)
+{
+       int r;
+
+       xgpu_ai_mailbox_trans_msg(adev, req);
+
+       /* start to poll ack */
+       r = xgpu_ai_poll_ack(adev);
+       if (r)
+               return r;
+
+       xgpu_ai_mailbox_set_valid(adev, false);
+
+       /* start to check msg if request is idh_req_gpu_init_access */
+       if (req == IDH_REQ_GPU_INIT_ACCESS ||
+               req == IDH_REQ_GPU_FINI_ACCESS ||
+               req == IDH_REQ_GPU_RESET_ACCESS) {
+               r = xgpu_vi_poll_msg(adev, IDH_READY_TO_ACCESS_GPU);
+               if (r)
+                       return r;
+       }
+
+       return 0;
+}
+
+static int xgpu_ai_request_full_gpu_access(struct amdgpu_device *adev,
+                                          bool init)
+{
+       enum idh_request req;
+
+       req = init ? IDH_REQ_GPU_INIT_ACCESS : IDH_REQ_GPU_FINI_ACCESS;
+       return xgpu_ai_send_access_requests(adev, req);
+}
+
+static int xgpu_ai_release_full_gpu_access(struct amdgpu_device *adev,
+                                          bool init)
+{
+       enum idh_request req;
+       int r = 0;
+
+       req = init ? IDH_REL_GPU_INIT_ACCESS : IDH_REL_GPU_FINI_ACCESS;
+       r = xgpu_ai_send_access_requests(adev, req);
+
+       return r;
+}
+
+const struct amdgpu_virt_ops xgpu_ai_virt_ops = {
+       .req_full_gpu   = xgpu_ai_request_full_gpu_access,
+       .rel_full_gpu   = xgpu_ai_release_full_gpu_access,
+};

diff --git a/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.h b/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.h
new file mode 100644 (file)
index 0000000..bf8ab8f
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2014 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.
+ *
+ */
+
+#ifndef __MXGPU_AI_H__
+#define __MXGPU_AI_H__
+
+#define AI_MAILBOX_TIMEDOUT    150000
+
+enum idh_request {
+       IDH_REQ_GPU_INIT_ACCESS = 1,
+       IDH_REL_GPU_INIT_ACCESS,
+       IDH_REQ_GPU_FINI_ACCESS,
+       IDH_REL_GPU_FINI_ACCESS,
+       IDH_REQ_GPU_RESET_ACCESS
+};
+
+enum idh_event {
+       IDH_CLR_MSG_BUF = 0,
+       IDH_READY_TO_ACCESS_GPU,
+       IDH_FLR_NOTIFICATION,
+       IDH_FLR_NOTIFICATION_CMPL,
+       IDH_EVENT_MAX
+};
+
+extern const struct amdgpu_virt_ops xgpu_ai_virt_ops;
+
+#endif