--- /dev/null
+/*
+ * 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 "nbio/nbio_2_3_offset.h"
+#include "nbio/nbio_2_3_sh_mask.h"
+#include "gc/gc_10_1_0_offset.h"
+#include "gc/gc_10_1_0_sh_mask.h"
+#include "soc15.h"
+#include "navi10_ih.h"
+#include "soc15_common.h"
+#include "mxgpu_nv.h"
+#include "mxgpu_ai.h"
+
+static void xgpu_nv_mailbox_send_ack(struct amdgpu_device *adev)
+{
+ WREG8(NV_MAIBOX_CONTROL_RCV_OFFSET_BYTE, 2);
+}
+
+static void xgpu_nv_mailbox_set_valid(struct amdgpu_device *adev, bool val)
+{
+ WREG8(NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE, val ? 1 : 0);
+}
+
+/*
+ * this peek_msg could *only* be called in IRQ routine becuase in IRQ routine
+ * RCV_MSG_VALID filed of BIF_BX_PF_MAILBOX_CONTROL must already be set to 1
+ * by host.
+ *
+ * if called no in IRQ routine, this peek_msg cannot guaranteed to return the
+ * correct value since it doesn't return the RCV_DW0 under the case that
+ * RCV_MSG_VALID is set by host.
+ */
+static enum idh_event xgpu_nv_mailbox_peek_msg(struct amdgpu_device *adev)
+{
+ return RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
+ mmBIF_BX_PF_MAILBOX_MSGBUF_RCV_DW0));
+}
+
+
+static int xgpu_nv_mailbox_rcv_msg(struct amdgpu_device *adev,
+ enum idh_event event)
+{
+ u32 reg;
+
+ reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
+ mmBIF_BX_PF_MAILBOX_MSGBUF_RCV_DW0));
+ if (reg != event)
+ return -ENOENT;
+
+ xgpu_nv_mailbox_send_ack(adev);
+
+ return 0;
+}
+
+static uint8_t xgpu_nv_peek_ack(struct amdgpu_device *adev)
+{
+ return RREG8(NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE) & 2;
+}
+
+static int xgpu_nv_poll_ack(struct amdgpu_device *adev)
+{
+ int timeout = NV_MAILBOX_POLL_ACK_TIMEDOUT;
+ u8 reg;
+
+ do {
+ reg = RREG8(NV_MAIBOX_CONTROL_TRN_OFFSET_BYTE);
+ if (reg & 2)
+ return 0;
+
+ mdelay(5);
+ timeout -= 5;
+ } while (timeout > 1);
+
+ pr_err("Doesn't get TRN_MSG_ACK from pf in %d msec\n", NV_MAILBOX_POLL_ACK_TIMEDOUT);
+
+ return -ETIME;
+}
+
+static int xgpu_nv_poll_msg(struct amdgpu_device *adev, enum idh_event event)
+{
+ int r, timeout = NV_MAILBOX_POLL_MSG_TIMEDOUT;
+
+ do {
+ r = xgpu_nv_mailbox_rcv_msg(adev, event);
+ if (!r)
+ return 0;
+
+ msleep(10);
+ timeout -= 10;
+ } while (timeout > 1);
+
+ pr_err("Doesn't get msg:%d from pf, error=%d\n", event, r);
+
+ return -ETIME;
+}
+
+static void xgpu_nv_mailbox_trans_msg (struct amdgpu_device *adev,
+ enum idh_request req, u32 data1, u32 data2, u32 data3)
+{
+ u32 reg;
+ int r;
+ uint8_t trn;
+
+ /* IMPORTANT:
+ * clear TRN_MSG_VALID valid to clear host's RCV_MSG_ACK
+ * and with host's RCV_MSG_ACK cleared hw automatically clear host's RCV_MSG_ACK
+ * which lead to VF's TRN_MSG_ACK cleared, otherwise below xgpu_nv_poll_ack()
+ * will return immediatly
+ */
+ do {
+ xgpu_nv_mailbox_set_valid(adev, false);
+ trn = xgpu_nv_peek_ack(adev);
+ if (trn) {
+ pr_err("trn=%x ACK should not assert! wait again !\n", trn);
+ msleep(1);
+ }
+ } while (trn);
+
+ reg = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
+ mmBIF_BX_PF_MAILBOX_MSGBUF_TRN_DW0));
+ reg = REG_SET_FIELD(reg, BIF_BX_PF_MAILBOX_MSGBUF_TRN_DW0,
+ MSGBUF_DATA, req);
+ WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_MAILBOX_MSGBUF_TRN_DW0),
+ reg);
+ WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_MAILBOX_MSGBUF_TRN_DW1),
+ data1);
+ WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_MAILBOX_MSGBUF_TRN_DW2),
+ data2);
+ WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_MAILBOX_MSGBUF_TRN_DW3),
+ data3);
+
+ xgpu_nv_mailbox_set_valid(adev, true);
+
+ /* start to poll ack */
+ r = xgpu_nv_poll_ack(adev);
+ if (r)
+ pr_err("Doesn't get ack from pf, continue\n");
+
+ xgpu_nv_mailbox_set_valid(adev, false);
+}
+
+static int xgpu_nv_send_access_requests(struct amdgpu_device *adev,
+ enum idh_request req)
+{
+ int r;
+
+ xgpu_nv_mailbox_trans_msg(adev, req, 0, 0, 0);
+
+ /* 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_nv_poll_msg(adev, IDH_READY_TO_ACCESS_GPU);
+ if (r) {
+ pr_err("Doesn't get READY_TO_ACCESS_GPU from pf, give up\n");
+ return r;
+ }
+ /* Retrieve checksum from mailbox2 */
+ if (req == IDH_REQ_GPU_INIT_ACCESS || req == IDH_REQ_GPU_RESET_ACCESS) {
+ adev->virt.fw_reserve.checksum_key =
+ RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0,
+ mmBIF_BX_PF_MAILBOX_MSGBUF_RCV_DW2));
+ }
+ }
+
+ return 0;
+}
+
+static int xgpu_nv_request_reset(struct amdgpu_device *adev)
+{
+ return xgpu_nv_send_access_requests(adev, IDH_REQ_GPU_RESET_ACCESS);
+}
+
+static int xgpu_nv_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_nv_send_access_requests(adev, req);
+}
+
+static int xgpu_nv_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_nv_send_access_requests(adev, req);
+
+ return r;
+}
+
+static int xgpu_nv_mailbox_ack_irq(struct amdgpu_device *adev,
+ struct amdgpu_irq_src *source,
+ struct amdgpu_iv_entry *entry)
+{
+ DRM_DEBUG("get ack intr and do nothing.\n");
+ return 0;
+}
+
+static int xgpu_nv_set_mailbox_ack_irq(struct amdgpu_device *adev,
+ struct amdgpu_irq_src *source,
+ unsigned type,
+ enum amdgpu_interrupt_state state)
+{
+ u32 tmp = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_MAILBOX_INT_CNTL));
+
+ tmp = REG_SET_FIELD(tmp, BIF_BX_PF_MAILBOX_INT_CNTL, ACK_INT_EN,
+ (state == AMDGPU_IRQ_STATE_ENABLE) ? 1 : 0);
+ WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_MAILBOX_INT_CNTL), tmp);
+
+ return 0;
+}
+
+static void xgpu_nv_mailbox_flr_work(struct work_struct *work)
+{
+ struct amdgpu_virt *virt = container_of(work, struct amdgpu_virt, flr_work);
+ struct amdgpu_device *adev = container_of(virt, struct amdgpu_device, virt);
+ int timeout = NV_MAILBOX_POLL_FLR_TIMEDOUT;
+ int locked;
+
+ /* block amdgpu_gpu_recover till msg FLR COMPLETE received,
+ * otherwise the mailbox msg will be ruined/reseted by
+ * the VF FLR.
+ *
+ * we can unlock the lock_reset to allow "amdgpu_job_timedout"
+ * to run gpu_recover() after FLR_NOTIFICATION_CMPL received
+ * which means host side had finished this VF's FLR.
+ */
+ locked = mutex_trylock(&adev->lock_reset);
+ if (locked)
+ adev->in_gpu_reset = 1;
+
+ do {
+ if (xgpu_nv_mailbox_peek_msg(adev) == IDH_FLR_NOTIFICATION_CMPL)
+ goto flr_done;
+
+ msleep(10);
+ timeout -= 10;
+ } while (timeout > 1);
+
+flr_done:
+ if (locked) {
+ adev->in_gpu_reset = 0;
+ mutex_unlock(&adev->lock_reset);
+ }
+
+ /* Trigger recovery for world switch failure if no TDR */
+ if (amdgpu_device_should_recover_gpu(adev))
+ amdgpu_device_gpu_recover(adev, NULL);
+}
+
+static int xgpu_nv_set_mailbox_rcv_irq(struct amdgpu_device *adev,
+ struct amdgpu_irq_src *src,
+ unsigned type,
+ enum amdgpu_interrupt_state state)
+{
+ u32 tmp = RREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_MAILBOX_INT_CNTL));
+
+ tmp = REG_SET_FIELD(tmp, BIF_BX_PF_MAILBOX_INT_CNTL, VALID_INT_EN,
+ (state == AMDGPU_IRQ_STATE_ENABLE) ? 1 : 0);
+ WREG32_NO_KIQ(SOC15_REG_OFFSET(NBIO, 0, mmBIF_BX_PF_MAILBOX_INT_CNTL), tmp);
+
+ return 0;
+}
+
+static int xgpu_nv_mailbox_rcv_irq(struct amdgpu_device *adev,
+ struct amdgpu_irq_src *source,
+ struct amdgpu_iv_entry *entry)
+{
+ enum idh_event event = xgpu_nv_mailbox_peek_msg(adev);
+
+ switch (event) {
+ case IDH_FLR_NOTIFICATION:
+ if (amdgpu_sriov_runtime(adev))
+ schedule_work(&adev->virt.flr_work);
+ break;
+ /* READY_TO_ACCESS_GPU is fetched by kernel polling, IRQ can ignore
+ * it byfar since that polling thread will handle it,
+ * other msg like flr complete is not handled here.
+ */
+ case IDH_CLR_MSG_BUF:
+ case IDH_FLR_NOTIFICATION_CMPL:
+ case IDH_READY_TO_ACCESS_GPU:
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+static const struct amdgpu_irq_src_funcs xgpu_nv_mailbox_ack_irq_funcs = {
+ .set = xgpu_nv_set_mailbox_ack_irq,
+ .process = xgpu_nv_mailbox_ack_irq,
+};
+
+static const struct amdgpu_irq_src_funcs xgpu_nv_mailbox_rcv_irq_funcs = {
+ .set = xgpu_nv_set_mailbox_rcv_irq,
+ .process = xgpu_nv_mailbox_rcv_irq,
+};
+
+void xgpu_nv_mailbox_set_irq_funcs(struct amdgpu_device *adev)
+{
+ adev->virt.ack_irq.num_types = 1;
+ adev->virt.ack_irq.funcs = &xgpu_nv_mailbox_ack_irq_funcs;
+ adev->virt.rcv_irq.num_types = 1;
+ adev->virt.rcv_irq.funcs = &xgpu_nv_mailbox_rcv_irq_funcs;
+}
+
+int xgpu_nv_mailbox_add_irq_id(struct amdgpu_device *adev)
+{
+ int r;
+
+ r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_BIF, 135, &adev->virt.rcv_irq);
+ if (r)
+ return r;
+
+ r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_BIF, 138, &adev->virt.ack_irq);
+ if (r) {
+ amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
+ return r;
+ }
+
+ return 0;
+}
+
+int xgpu_nv_mailbox_get_irq(struct amdgpu_device *adev)
+{
+ int r;
+
+ r = amdgpu_irq_get(adev, &adev->virt.rcv_irq, 0);
+ if (r)
+ return r;
+ r = amdgpu_irq_get(adev, &adev->virt.ack_irq, 0);
+ if (r) {
+ amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
+ return r;
+ }
+
+ INIT_WORK(&adev->virt.flr_work, xgpu_nv_mailbox_flr_work);
+
+ return 0;
+}
+
+void xgpu_nv_mailbox_put_irq(struct amdgpu_device *adev)
+{
+ amdgpu_irq_put(adev, &adev->virt.ack_irq, 0);
+ amdgpu_irq_put(adev, &adev->virt.rcv_irq, 0);
+}
+
+const struct amdgpu_virt_ops xgpu_nv_virt_ops = {
+ .req_full_gpu = xgpu_nv_request_full_gpu_access,
+ .rel_full_gpu = xgpu_nv_release_full_gpu_access,
+ .reset_gpu = xgpu_nv_request_reset,
+ .wait_reset = NULL,
+ .trans_msg = xgpu_nv_mailbox_trans_msg,
+};
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