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/mxgpu_ai.c b/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c
new file mode 100644
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,
+};