This should prevent writing to memory or IO ranges possibly
already allocated for other uses after our device is removed.

v5:
Protect more places wher memcopy_to/form_io takes place
Protect IB submissions

v6: Switch to !drm_dev_enter instead of scoping entire code
with brackets.

Signed-off-by: Andrey Grodzovsky <andrey.grodzov...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c    | 11 ++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c       |  9 +++
 drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c        | 17 +++--
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c       | 63 +++++++++++------
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h       |  2 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c      | 70 +++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h      | 49 ++-----------
 drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c       | 31 +++++---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c       | 11 ++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c       | 22 ++++--
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c        |  7 +-
 drivers/gpu/drm/amd/amdgpu/psp_v11_0.c        | 44 ++++++------
 drivers/gpu/drm/amd/amdgpu/psp_v12_0.c        |  8 +--
 drivers/gpu/drm/amd/amdgpu/psp_v3_1.c         |  8 +--
 drivers/gpu/drm/amd/amdgpu/vce_v4_0.c         | 26 ++++---
 drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c         | 22 +++---
 .../drm/amd/pm/powerplay/smumgr/smu7_smumgr.c |  2 +
 17 files changed, 257 insertions(+), 145 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index a0bff4713672..94c415176cdc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -71,6 +71,8 @@
 #include <drm/task_barrier.h>
 #include <linux/pm_runtime.h>
 
+#include <drm/drm_drv.h>
+
 MODULE_FIRMWARE("amdgpu/vega10_gpu_info.bin");
 MODULE_FIRMWARE("amdgpu/vega12_gpu_info.bin");
 MODULE_FIRMWARE("amdgpu/raven_gpu_info.bin");
@@ -281,7 +283,10 @@ void amdgpu_device_vram_access(struct amdgpu_device *adev, 
loff_t pos,
        unsigned long flags;
        uint32_t hi = ~0;
        uint64_t last;
+       int idx;
 
+        if (!drm_dev_enter(&adev->ddev, &idx))
+                return;
 
 #ifdef CONFIG_64BIT
        last = min(pos + size, adev->gmc.visible_vram_size);
@@ -299,8 +304,10 @@ void amdgpu_device_vram_access(struct amdgpu_device *adev, 
loff_t pos,
                        memcpy_fromio(buf, addr, count);
                }
 
-               if (count == size)
+               if (count == size) {
+                       drm_dev_exit(idx);
                        return;
+               }
 
                pos += count;
                buf += count / 4;
@@ -323,6 +330,8 @@ void amdgpu_device_vram_access(struct amdgpu_device *adev, 
loff_t pos,
                        *buf++ = RREG32_NO_KIQ(mmMM_DATA);
        }
        spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
+
+       drm_dev_exit(idx);
 }
 
 /*
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
index 4d32233cde92..04ba5eef1e88 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
@@ -31,6 +31,8 @@
 #include "amdgpu_ras.h"
 #include "amdgpu_xgmi.h"
 
+#include <drm/drm_drv.h>
+
 /**
  * amdgpu_gmc_pdb0_alloc - allocate vram for pdb0
  *
@@ -151,6 +153,10 @@ int amdgpu_gmc_set_pte_pde(struct amdgpu_device *adev, 
void *cpu_pt_addr,
 {
        void __iomem *ptr = (void *)cpu_pt_addr;
        uint64_t value;
+       int idx;
+
+       if (!drm_dev_enter(&adev->ddev, &idx))
+               return 0;
 
        /*
         * The following is for PTE only. GART does not have PDEs.
@@ -158,6 +164,9 @@ int amdgpu_gmc_set_pte_pde(struct amdgpu_device *adev, void 
*cpu_pt_addr,
        value = addr & 0x0000FFFFFFFFF000ULL;
        value |= flags;
        writeq(value, ptr + (gpu_page_idx * 8));
+
+       drm_dev_exit(idx);
+
        return 0;
 }
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
index 148a3b481b12..62fcbd446c71 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
@@ -30,6 +30,7 @@
 #include <linux/slab.h>
 
 #include <drm/amdgpu_drm.h>
+#include <drm/drm_drv.h>
 
 #include "amdgpu.h"
 #include "atom.h"
@@ -137,7 +138,7 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned 
num_ibs,
        bool secure;
 
        unsigned i;
-       int r = 0;
+       int idx, r = 0;
        bool need_pipe_sync = false;
 
        if (num_ibs == 0)
@@ -169,13 +170,16 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned 
num_ibs,
                return -EINVAL;
        }
 
+       if (!drm_dev_enter(&adev->ddev, &idx))
+               return -ENODEV;
+
        alloc_size = ring->funcs->emit_frame_size + num_ibs *
                ring->funcs->emit_ib_size;
 
        r = amdgpu_ring_alloc(ring, alloc_size);
        if (r) {
                dev_err(adev->dev, "scheduling IB failed (%d).\n", r);
-               return r;
+               goto exit;
        }
 
        need_ctx_switch = ring->current_ctx != fence_ctx;
@@ -205,7 +209,7 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned 
num_ibs,
                r = amdgpu_vm_flush(ring, job, need_pipe_sync);
                if (r) {
                        amdgpu_ring_undo(ring);
-                       return r;
+                       goto exit;
                }
        }
 
@@ -286,7 +290,7 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned 
num_ibs,
                if (job && job->vmid)
                        amdgpu_vmid_reset(adev, ring->funcs->vmhub, job->vmid);
                amdgpu_ring_undo(ring);
-               return r;
+               goto exit;
        }
 
        if (ring->funcs->insert_end)
@@ -304,7 +308,10 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned 
num_ibs,
                ring->funcs->emit_wave_limit(ring, false);
 
        amdgpu_ring_commit(ring);
-       return 0;
+
+exit:
+       drm_dev_exit(idx);
+       return r;
 }
 
 /**
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index 9e769cf6095b..bb6afee61666 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -25,6 +25,7 @@
 
 #include <linux/firmware.h>
 #include <linux/dma-mapping.h>
+#include <drm/drm_drv.h>
 
 #include "amdgpu.h"
 #include "amdgpu_psp.h"
@@ -39,6 +40,8 @@
 #include "amdgpu_ras.h"
 #include "amdgpu_securedisplay.h"
 
+#include <drm/drm_drv.h>
+
 static int psp_sysfs_init(struct amdgpu_device *adev);
 static void psp_sysfs_fini(struct amdgpu_device *adev);
 
@@ -253,7 +256,7 @@ psp_cmd_submit_buf(struct psp_context *psp,
                   struct psp_gfx_cmd_resp *cmd, uint64_t fence_mc_addr)
 {
        int ret;
-       int index;
+       int index, idx;
        int timeout = 20000;
        bool ras_intr = false;
        bool skip_unsupport = false;
@@ -261,6 +264,9 @@ psp_cmd_submit_buf(struct psp_context *psp,
        if (psp->adev->in_pci_err_recovery)
                return 0;
 
+       if (!drm_dev_enter(&psp->adev->ddev, &idx))
+               return 0;
+
        mutex_lock(&psp->mutex);
 
        memset(psp->cmd_buf_mem, 0, PSP_CMD_BUFFER_SIZE);
@@ -271,8 +277,7 @@ psp_cmd_submit_buf(struct psp_context *psp,
        ret = psp_ring_cmd_submit(psp, psp->cmd_buf_mc_addr, fence_mc_addr, 
index);
        if (ret) {
                atomic_dec(&psp->fence_value);
-               mutex_unlock(&psp->mutex);
-               return ret;
+               goto exit;
        }
 
        amdgpu_asic_invalidate_hdp(psp->adev, NULL);
@@ -312,8 +317,8 @@ psp_cmd_submit_buf(struct psp_context *psp,
                         psp->cmd_buf_mem->cmd_id,
                         psp->cmd_buf_mem->resp.status);
                if (!timeout) {
-                       mutex_unlock(&psp->mutex);
-                       return -EINVAL;
+                       ret = -EINVAL;
+                       goto exit;
                }
        }
 
@@ -321,8 +326,10 @@ psp_cmd_submit_buf(struct psp_context *psp,
                ucode->tmr_mc_addr_lo = psp->cmd_buf_mem->resp.fw_addr_lo;
                ucode->tmr_mc_addr_hi = psp->cmd_buf_mem->resp.fw_addr_hi;
        }
-       mutex_unlock(&psp->mutex);
 
+exit:
+       mutex_unlock(&psp->mutex);
+       drm_dev_exit(idx);
        return ret;
 }
 
@@ -359,8 +366,7 @@ static int psp_load_toc(struct psp_context *psp,
        if (!cmd)
                return -ENOMEM;
        /* Copy toc to psp firmware private buffer */
-       memset(psp->fw_pri_buf, 0, PSP_1_MEG);
-       memcpy(psp->fw_pri_buf, psp->toc_start_addr, psp->toc_bin_size);
+       psp_copy_fw(psp, psp->toc_start_addr, psp->toc_bin_size);
 
        psp_prep_load_toc_cmd_buf(cmd, psp->fw_pri_mc_addr, psp->toc_bin_size);
 
@@ -625,8 +631,7 @@ static int psp_asd_load(struct psp_context *psp)
        if (!cmd)
                return -ENOMEM;
 
-       memset(psp->fw_pri_buf, 0, PSP_1_MEG);
-       memcpy(psp->fw_pri_buf, psp->asd_start_addr, psp->asd_ucode_size);
+       psp_copy_fw(psp, psp->asd_start_addr, psp->asd_ucode_size);
 
        psp_prep_asd_load_cmd_buf(cmd, psp->fw_pri_mc_addr,
                                  psp->asd_ucode_size);
@@ -781,8 +786,7 @@ static int psp_xgmi_load(struct psp_context *psp)
        if (!cmd)
                return -ENOMEM;
 
-       memset(psp->fw_pri_buf, 0, PSP_1_MEG);
-       memcpy(psp->fw_pri_buf, psp->ta_xgmi_start_addr, 
psp->ta_xgmi_ucode_size);
+       psp_copy_fw(psp, psp->ta_xgmi_start_addr, psp->ta_xgmi_ucode_size);
 
        psp_prep_ta_load_cmd_buf(cmd,
                                 psp->fw_pri_mc_addr,
@@ -1038,8 +1042,7 @@ static int psp_ras_load(struct psp_context *psp)
        if (!cmd)
                return -ENOMEM;
 
-       memset(psp->fw_pri_buf, 0, PSP_1_MEG);
-       memcpy(psp->fw_pri_buf, psp->ta_ras_start_addr, psp->ta_ras_ucode_size);
+       psp_copy_fw(psp, psp->ta_ras_start_addr, psp->ta_ras_ucode_size);
 
        psp_prep_ta_load_cmd_buf(cmd,
                                 psp->fw_pri_mc_addr,
@@ -1275,8 +1278,7 @@ static int psp_hdcp_load(struct psp_context *psp)
        if (!cmd)
                return -ENOMEM;
 
-       memset(psp->fw_pri_buf, 0, PSP_1_MEG);
-       memcpy(psp->fw_pri_buf, psp->ta_hdcp_start_addr,
+       psp_copy_fw(psp, psp->ta_hdcp_start_addr,
               psp->ta_hdcp_ucode_size);
 
        psp_prep_ta_load_cmd_buf(cmd,
@@ -1427,8 +1429,7 @@ static int psp_dtm_load(struct psp_context *psp)
        if (!cmd)
                return -ENOMEM;
 
-       memset(psp->fw_pri_buf, 0, PSP_1_MEG);
-       memcpy(psp->fw_pri_buf, psp->ta_dtm_start_addr, psp->ta_dtm_ucode_size);
+       psp_copy_fw(psp, psp->ta_dtm_start_addr, psp->ta_dtm_ucode_size);
 
        psp_prep_ta_load_cmd_buf(cmd,
                                 psp->fw_pri_mc_addr,
@@ -1573,8 +1574,7 @@ static int psp_rap_load(struct psp_context *psp)
        if (!cmd)
                return -ENOMEM;
 
-       memset(psp->fw_pri_buf, 0, PSP_1_MEG);
-       memcpy(psp->fw_pri_buf, psp->ta_rap_start_addr, psp->ta_rap_ucode_size);
+       psp_copy_fw(psp, psp->ta_rap_start_addr, psp->ta_rap_ucode_size);
 
        psp_prep_ta_load_cmd_buf(cmd,
                                 psp->fw_pri_mc_addr,
@@ -3022,7 +3022,7 @@ static ssize_t psp_usbc_pd_fw_sysfs_write(struct device 
*dev,
        struct amdgpu_device *adev = drm_to_adev(ddev);
        void *cpu_addr;
        dma_addr_t dma_addr;
-       int ret;
+       int ret, idx;
        char fw_name[100];
        const struct firmware *usbc_pd_fw;
 
@@ -3031,6 +3031,9 @@ static ssize_t psp_usbc_pd_fw_sysfs_write(struct device 
*dev,
                return -EBUSY;
        }
 
+       if (!drm_dev_enter(ddev, &idx))
+               return -ENODEV;
+
        snprintf(fw_name, sizeof(fw_name), "amdgpu/%s", buf);
        ret = request_firmware(&usbc_pd_fw, fw_name, adev->dev);
        if (ret)
@@ -3062,16 +3065,30 @@ static ssize_t psp_usbc_pd_fw_sysfs_write(struct device 
*dev,
 rel_buf:
        dma_free_coherent(adev->dev, usbc_pd_fw->size, cpu_addr, dma_addr);
        release_firmware(usbc_pd_fw);
-
 fail:
        if (ret) {
                DRM_ERROR("Failed to load USBC PD FW, err = %d", ret);
-               return ret;
+               count = ret;
        }
 
+       drm_dev_exit(idx);
        return count;
 }
 
+void psp_copy_fw(struct psp_context *psp, uint8_t *start_addr, uint32_t 
bin_size)
+{
+       int idx;
+
+       if (!drm_dev_enter(&psp->adev->ddev, &idx))
+               return;
+
+       memset(psp->fw_pri_buf, 0, PSP_1_MEG);
+       memcpy(psp->fw_pri_buf, start_addr, bin_size);
+
+       drm_dev_exit(idx);
+}
+
+
 static DEVICE_ATTR(usbc_pd_fw, S_IRUGO | S_IWUSR,
                   psp_usbc_pd_fw_sysfs_read,
                   psp_usbc_pd_fw_sysfs_write);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h
index 46a5328e00e0..2bfdc278817f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h
@@ -423,4 +423,6 @@ int psp_get_fw_attestation_records_addr(struct psp_context 
*psp,
 
 int psp_load_fw_list(struct psp_context *psp,
                     struct amdgpu_firmware_info **ucode_list, int ucode_count);
+void psp_copy_fw(struct psp_context *psp, uint8_t *start_addr, uint32_t 
bin_size);
+
 #endif
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
index 688624ebe421..e1985bc34436 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
@@ -35,6 +35,8 @@
 #include "amdgpu.h"
 #include "atom.h"
 
+#include <drm/drm_drv.h>
+
 /*
  * Rings
  * Most engines on the GPU are fed via ring buffers.  Ring
@@ -461,3 +463,71 @@ int amdgpu_ring_test_helper(struct amdgpu_ring *ring)
        ring->sched.ready = !r;
        return r;
 }
+
+void amdgpu_ring_clear_ring(struct amdgpu_ring *ring)
+{
+       int idx;
+       int i = 0;
+
+       if (!drm_dev_enter(&ring->adev->ddev, &idx))
+               return;
+
+       while (i <= ring->buf_mask)
+               ring->ring[i++] = ring->funcs->nop;
+
+       drm_dev_exit(idx);
+
+}
+
+void amdgpu_ring_write(struct amdgpu_ring *ring, uint32_t v)
+{
+       int idx;
+
+       if (!drm_dev_enter(&ring->adev->ddev, &idx))
+               return;
+
+       if (ring->count_dw <= 0)
+               DRM_ERROR("amdgpu: writing more dwords to the ring than 
expected!\n");
+       ring->ring[ring->wptr++ & ring->buf_mask] = v;
+       ring->wptr &= ring->ptr_mask;
+       ring->count_dw--;
+
+       drm_dev_exit(idx);
+}
+
+void amdgpu_ring_write_multiple(struct amdgpu_ring *ring,
+                                             void *src, int count_dw)
+{
+       unsigned occupied, chunk1, chunk2;
+       void *dst;
+       int idx;
+
+       if (!drm_dev_enter(&ring->adev->ddev, &idx))
+               return;
+
+       if (unlikely(ring->count_dw < count_dw))
+               DRM_ERROR("amdgpu: writing more dwords to the ring than 
expected!\n");
+
+       occupied = ring->wptr & ring->buf_mask;
+       dst = (void *)&ring->ring[occupied];
+       chunk1 = ring->buf_mask + 1 - occupied;
+       chunk1 = (chunk1 >= count_dw) ? count_dw: chunk1;
+       chunk2 = count_dw - chunk1;
+       chunk1 <<= 2;
+       chunk2 <<= 2;
+
+       if (chunk1)
+               memcpy(dst, src, chunk1);
+
+       if (chunk2) {
+               src += chunk1;
+               dst = (void *)ring->ring;
+               memcpy(dst, src, chunk2);
+       }
+
+       ring->wptr += count_dw;
+       ring->wptr &= ring->ptr_mask;
+       ring->count_dw -= count_dw;
+
+       drm_dev_exit(idx);
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
index e7d3d0dbdd96..c67bc6d3d039 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
@@ -299,53 +299,12 @@ static inline void 
amdgpu_ring_set_preempt_cond_exec(struct amdgpu_ring *ring,
        *ring->cond_exe_cpu_addr = cond_exec;
 }
 
-static inline void amdgpu_ring_clear_ring(struct amdgpu_ring *ring)
-{
-       int i = 0;
-       while (i <= ring->buf_mask)
-               ring->ring[i++] = ring->funcs->nop;
-
-}
-
-static inline void amdgpu_ring_write(struct amdgpu_ring *ring, uint32_t v)
-{
-       if (ring->count_dw <= 0)
-               DRM_ERROR("amdgpu: writing more dwords to the ring than 
expected!\n");
-       ring->ring[ring->wptr++ & ring->buf_mask] = v;
-       ring->wptr &= ring->ptr_mask;
-       ring->count_dw--;
-}
+void amdgpu_ring_clear_ring(struct amdgpu_ring *ring);
 
-static inline void amdgpu_ring_write_multiple(struct amdgpu_ring *ring,
-                                             void *src, int count_dw)
-{
-       unsigned occupied, chunk1, chunk2;
-       void *dst;
-
-       if (unlikely(ring->count_dw < count_dw))
-               DRM_ERROR("amdgpu: writing more dwords to the ring than 
expected!\n");
-
-       occupied = ring->wptr & ring->buf_mask;
-       dst = (void *)&ring->ring[occupied];
-       chunk1 = ring->buf_mask + 1 - occupied;
-       chunk1 = (chunk1 >= count_dw) ? count_dw: chunk1;
-       chunk2 = count_dw - chunk1;
-       chunk1 <<= 2;
-       chunk2 <<= 2;
+void amdgpu_ring_write(struct amdgpu_ring *ring, uint32_t v);
 
-       if (chunk1)
-               memcpy(dst, src, chunk1);
-
-       if (chunk2) {
-               src += chunk1;
-               dst = (void *)ring->ring;
-               memcpy(dst, src, chunk2);
-       }
-
-       ring->wptr += count_dw;
-       ring->wptr &= ring->ptr_mask;
-       ring->count_dw -= count_dw;
-}
+void amdgpu_ring_write_multiple(struct amdgpu_ring *ring,
+                                             void *src, int count_dw);
 
 int amdgpu_ring_test_helper(struct amdgpu_ring *ring);
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
index c6dbc0801604..82f0542c7792 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
@@ -32,6 +32,7 @@
 #include <linux/module.h>
 
 #include <drm/drm.h>
+#include <drm/drm_drv.h>
 
 #include "amdgpu.h"
 #include "amdgpu_pm.h"
@@ -375,7 +376,7 @@ int amdgpu_uvd_suspend(struct amdgpu_device *adev)
 {
        unsigned size;
        void *ptr;
-       int i, j;
+       int i, j, idx;
        bool in_ras_intr = amdgpu_ras_intr_triggered();
 
        cancel_delayed_work_sync(&adev->uvd.idle_work);
@@ -403,11 +404,15 @@ int amdgpu_uvd_suspend(struct amdgpu_device *adev)
                if (!adev->uvd.inst[j].saved_bo)
                        return -ENOMEM;
 
-               /* re-write 0 since err_event_athub will corrupt VCPU buffer */
-               if (in_ras_intr)
-                       memset(adev->uvd.inst[j].saved_bo, 0, size);
-               else
-                       memcpy_fromio(adev->uvd.inst[j].saved_bo, ptr, size);
+               if (drm_dev_enter(&adev->ddev, &idx)) {
+                       /* re-write 0 since err_event_athub will corrupt VCPU 
buffer */
+                       if (in_ras_intr)
+                               memset(adev->uvd.inst[j].saved_bo, 0, size);
+                       else
+                               memcpy_fromio(adev->uvd.inst[j].saved_bo, ptr, 
size);
+
+                       drm_dev_exit(idx);
+               }
        }
 
        if (in_ras_intr)
@@ -420,7 +425,7 @@ int amdgpu_uvd_resume(struct amdgpu_device *adev)
 {
        unsigned size;
        void *ptr;
-       int i;
+       int i, idx;
 
        for (i = 0; i < adev->uvd.num_uvd_inst; i++) {
                if (adev->uvd.harvest_config & (1 << i))
@@ -432,7 +437,10 @@ int amdgpu_uvd_resume(struct amdgpu_device *adev)
                ptr = adev->uvd.inst[i].cpu_addr;
 
                if (adev->uvd.inst[i].saved_bo != NULL) {
-                       memcpy_toio(ptr, adev->uvd.inst[i].saved_bo, size);
+                       if (drm_dev_enter(&adev->ddev, &idx)) {
+                               memcpy_toio(ptr, adev->uvd.inst[i].saved_bo, 
size);
+                               drm_dev_exit(idx);
+                       }
                        kvfree(adev->uvd.inst[i].saved_bo);
                        adev->uvd.inst[i].saved_bo = NULL;
                } else {
@@ -442,8 +450,11 @@ int amdgpu_uvd_resume(struct amdgpu_device *adev)
                        hdr = (const struct common_firmware_header 
*)adev->uvd.fw->data;
                        if (adev->firmware.load_type != AMDGPU_FW_LOAD_PSP) {
                                offset = 
le32_to_cpu(hdr->ucode_array_offset_bytes);
-                               memcpy_toio(adev->uvd.inst[i].cpu_addr, 
adev->uvd.fw->data + offset,
-                                           le32_to_cpu(hdr->ucode_size_bytes));
+                               if (drm_dev_enter(&adev->ddev, &idx)) {
+                                       memcpy_toio(adev->uvd.inst[i].cpu_addr, 
adev->uvd.fw->data + offset,
+                                                   
le32_to_cpu(hdr->ucode_size_bytes));
+                                       drm_dev_exit(idx);
+                               }
                                size -= le32_to_cpu(hdr->ucode_size_bytes);
                                ptr += le32_to_cpu(hdr->ucode_size_bytes);
                        }
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
index ea6a62f67e38..833203401ef4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
@@ -29,6 +29,7 @@
 #include <linux/module.h>
 
 #include <drm/drm.h>
+#include <drm/drm_drv.h>
 
 #include "amdgpu.h"
 #include "amdgpu_pm.h"
@@ -293,7 +294,7 @@ int amdgpu_vce_resume(struct amdgpu_device *adev)
        void *cpu_addr;
        const struct common_firmware_header *hdr;
        unsigned offset;
-       int r;
+       int r, idx;
 
        if (adev->vce.vcpu_bo == NULL)
                return -EINVAL;
@@ -313,8 +314,12 @@ int amdgpu_vce_resume(struct amdgpu_device *adev)
 
        hdr = (const struct common_firmware_header *)adev->vce.fw->data;
        offset = le32_to_cpu(hdr->ucode_array_offset_bytes);
-       memcpy_toio(cpu_addr, adev->vce.fw->data + offset,
-                   adev->vce.fw->size - offset);
+
+       if (drm_dev_enter(&adev->ddev, &idx)) {
+               memcpy_toio(cpu_addr, adev->vce.fw->data + offset,
+                           adev->vce.fw->size - offset);
+               drm_dev_exit(idx);
+       }
 
        amdgpu_bo_kunmap(adev->vce.vcpu_bo);
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
index 201645963ba5..21f7d3644d70 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
@@ -27,6 +27,7 @@
 #include <linux/firmware.h>
 #include <linux/module.h>
 #include <linux/pci.h>
+#include <drm/drm_drv.h>
 
 #include "amdgpu.h"
 #include "amdgpu_pm.h"
@@ -275,7 +276,7 @@ int amdgpu_vcn_suspend(struct amdgpu_device *adev)
 {
        unsigned size;
        void *ptr;
-       int i;
+       int i, idx;
 
        cancel_delayed_work_sync(&adev->vcn.idle_work);
 
@@ -292,7 +293,10 @@ int amdgpu_vcn_suspend(struct amdgpu_device *adev)
                if (!adev->vcn.inst[i].saved_bo)
                        return -ENOMEM;
 
-               memcpy_fromio(adev->vcn.inst[i].saved_bo, ptr, size);
+               if (drm_dev_enter(&adev->ddev, &idx)) {
+                       memcpy_fromio(adev->vcn.inst[i].saved_bo, ptr, size);
+                       drm_dev_exit(idx);
+               }
        }
        return 0;
 }
@@ -301,7 +305,7 @@ int amdgpu_vcn_resume(struct amdgpu_device *adev)
 {
        unsigned size;
        void *ptr;
-       int i;
+       int i, idx;
 
        for (i = 0; i < adev->vcn.num_vcn_inst; ++i) {
                if (adev->vcn.harvest_config & (1 << i))
@@ -313,7 +317,10 @@ int amdgpu_vcn_resume(struct amdgpu_device *adev)
                ptr = adev->vcn.inst[i].cpu_addr;
 
                if (adev->vcn.inst[i].saved_bo != NULL) {
-                       memcpy_toio(ptr, adev->vcn.inst[i].saved_bo, size);
+                       if (drm_dev_enter(&adev->ddev, &idx)) {
+                               memcpy_toio(ptr, adev->vcn.inst[i].saved_bo, 
size);
+                               drm_dev_exit(idx);
+                       }
                        kvfree(adev->vcn.inst[i].saved_bo);
                        adev->vcn.inst[i].saved_bo = NULL;
                } else {
@@ -323,8 +330,11 @@ int amdgpu_vcn_resume(struct amdgpu_device *adev)
                        hdr = (const struct common_firmware_header 
*)adev->vcn.fw->data;
                        if (adev->firmware.load_type != AMDGPU_FW_LOAD_PSP) {
                                offset = 
le32_to_cpu(hdr->ucode_array_offset_bytes);
-                               memcpy_toio(adev->vcn.inst[i].cpu_addr, 
adev->vcn.fw->data + offset,
-                                           le32_to_cpu(hdr->ucode_size_bytes));
+                               if (drm_dev_enter(&adev->ddev, &idx)) {
+                                       memcpy_toio(adev->vcn.inst[i].cpu_addr, 
adev->vcn.fw->data + offset,
+                                                   
le32_to_cpu(hdr->ucode_size_bytes));
+                                       drm_dev_exit(idx);
+                               }
                                size -= le32_to_cpu(hdr->ucode_size_bytes);
                                ptr += le32_to_cpu(hdr->ucode_size_bytes);
                        }
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 9f868cf3b832..7dd5f10ab570 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -32,6 +32,7 @@
 #include <linux/dma-buf.h>
 
 #include <drm/amdgpu_drm.h>
+#include <drm/drm_drv.h>
 #include "amdgpu.h"
 #include "amdgpu_trace.h"
 #include "amdgpu_amdkfd.h"
@@ -1606,7 +1607,10 @@ static int amdgpu_vm_bo_update_mapping(struct 
amdgpu_device *adev,
        struct amdgpu_vm_update_params params;
        enum amdgpu_sync_mode sync_mode;
        uint64_t pfn;
-       int r;
+       int r, idx;
+
+       if (!drm_dev_enter(&adev->ddev, &idx))
+               return -ENODEV;
 
        memset(&params, 0, sizeof(params));
        params.adev = adev;
@@ -1715,6 +1719,7 @@ static int amdgpu_vm_bo_update_mapping(struct 
amdgpu_device *adev,
 
 error_unlock:
        amdgpu_vm_eviction_unlock(vm);
+       drm_dev_exit(idx);
        return r;
 }
 
diff --git a/drivers/gpu/drm/amd/amdgpu/psp_v11_0.c 
b/drivers/gpu/drm/amd/amdgpu/psp_v11_0.c
index 589410c32d09..2cec71e823f5 100644
--- a/drivers/gpu/drm/amd/amdgpu/psp_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/psp_v11_0.c
@@ -23,6 +23,7 @@
 #include <linux/firmware.h>
 #include <linux/module.h>
 #include <linux/vmalloc.h>
+#include <drm/drm_drv.h>
 
 #include "amdgpu.h"
 #include "amdgpu_psp.h"
@@ -269,10 +270,8 @@ static int psp_v11_0_bootloader_load_kdb(struct 
psp_context *psp)
        if (ret)
                return ret;
 
-       memset(psp->fw_pri_buf, 0, PSP_1_MEG);
-
        /* Copy PSP KDB binary to memory */
-       memcpy(psp->fw_pri_buf, psp->kdb_start_addr, psp->kdb_bin_size);
+       psp_copy_fw(psp, psp->kdb_start_addr, psp->kdb_bin_size);
 
        /* Provide the PSP KDB to bootloader */
        WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_36,
@@ -302,10 +301,8 @@ static int psp_v11_0_bootloader_load_spl(struct 
psp_context *psp)
        if (ret)
                return ret;
 
-       memset(psp->fw_pri_buf, 0, PSP_1_MEG);
-
        /* Copy PSP SPL binary to memory */
-       memcpy(psp->fw_pri_buf, psp->spl_start_addr, psp->spl_bin_size);
+       psp_copy_fw(psp, psp->spl_start_addr, psp->spl_bin_size);
 
        /* Provide the PSP SPL to bootloader */
        WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_36,
@@ -335,10 +332,8 @@ static int psp_v11_0_bootloader_load_sysdrv(struct 
psp_context *psp)
        if (ret)
                return ret;
 
-       memset(psp->fw_pri_buf, 0, PSP_1_MEG);
-
        /* Copy PSP System Driver binary to memory */
-       memcpy(psp->fw_pri_buf, psp->sys_start_addr, psp->sys_bin_size);
+       psp_copy_fw(psp, psp->sys_start_addr, psp->sys_bin_size);
 
        /* Provide the sys driver to bootloader */
        WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_36,
@@ -371,10 +366,8 @@ static int psp_v11_0_bootloader_load_sos(struct 
psp_context *psp)
        if (ret)
                return ret;
 
-       memset(psp->fw_pri_buf, 0, PSP_1_MEG);
-
        /* Copy Secure OS binary to PSP memory */
-       memcpy(psp->fw_pri_buf, psp->sos_start_addr, psp->sos_bin_size);
+       psp_copy_fw(psp, psp->sos_start_addr, psp->sos_bin_size);
 
        /* Provide the PSP secure OS to bootloader */
        WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_36,
@@ -608,7 +601,7 @@ static int psp_v11_0_memory_training(struct psp_context 
*psp, uint32_t ops)
        uint32_t p2c_header[4];
        uint32_t sz;
        void *buf;
-       int ret;
+       int ret, idx;
 
        if (ctx->init == PSP_MEM_TRAIN_NOT_SUPPORT) {
                DRM_DEBUG("Memory training is not supported.\n");
@@ -681,17 +674,24 @@ static int psp_v11_0_memory_training(struct psp_context 
*psp, uint32_t ops)
                        return -ENOMEM;
                }
 
-               memcpy_fromio(buf, adev->mman.aper_base_kaddr, sz);
-               ret = psp_v11_0_memory_training_send_msg(psp, 
PSP_BL__DRAM_LONG_TRAIN);
-               if (ret) {
-                       DRM_ERROR("Send long training msg failed.\n");
+               if (drm_dev_enter(&adev->ddev, &idx)) {
+                       memcpy_fromio(buf, adev->mman.aper_base_kaddr, sz);
+                       ret = psp_v11_0_memory_training_send_msg(psp, 
PSP_BL__DRAM_LONG_TRAIN);
+                       if (ret) {
+                               DRM_ERROR("Send long training msg failed.\n");
+                               vfree(buf);
+                               drm_dev_exit(idx);
+                               return ret;
+                       }
+
+                       memcpy_toio(adev->mman.aper_base_kaddr, buf, sz);
+                       adev->hdp.funcs->flush_hdp(adev, NULL);
                        vfree(buf);
-                       return ret;
+                       drm_dev_exit(idx);
+               } else {
+                       vfree(buf);
+                       return -ENODEV;
                }
-
-               memcpy_toio(adev->mman.aper_base_kaddr, buf, sz);
-               adev->hdp.funcs->flush_hdp(adev, NULL);
-               vfree(buf);
        }
 
        if (ops & PSP_MEM_TRAIN_SAVE) {
diff --git a/drivers/gpu/drm/amd/amdgpu/psp_v12_0.c 
b/drivers/gpu/drm/amd/amdgpu/psp_v12_0.c
index c4828bd3264b..618e5b6b85d9 100644
--- a/drivers/gpu/drm/amd/amdgpu/psp_v12_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/psp_v12_0.c
@@ -138,10 +138,8 @@ static int psp_v12_0_bootloader_load_sysdrv(struct 
psp_context *psp)
        if (ret)
                return ret;
 
-       memset(psp->fw_pri_buf, 0, PSP_1_MEG);
-
        /* Copy PSP System Driver binary to memory */
-       memcpy(psp->fw_pri_buf, psp->sys_start_addr, psp->sys_bin_size);
+       psp_copy_fw(psp, psp->sys_start_addr, psp->sys_bin_size);
 
        /* Provide the sys driver to bootloader */
        WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_36,
@@ -179,10 +177,8 @@ static int psp_v12_0_bootloader_load_sos(struct 
psp_context *psp)
        if (ret)
                return ret;
 
-       memset(psp->fw_pri_buf, 0, PSP_1_MEG);
-
        /* Copy Secure OS binary to PSP memory */
-       memcpy(psp->fw_pri_buf, psp->sos_start_addr, psp->sos_bin_size);
+       psp_copy_fw(psp, psp->sos_start_addr, psp->sos_bin_size);
 
        /* Provide the PSP secure OS to bootloader */
        WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_36,
diff --git a/drivers/gpu/drm/amd/amdgpu/psp_v3_1.c 
b/drivers/gpu/drm/amd/amdgpu/psp_v3_1.c
index f2e725f72d2f..d0a6cccd0897 100644
--- a/drivers/gpu/drm/amd/amdgpu/psp_v3_1.c
+++ b/drivers/gpu/drm/amd/amdgpu/psp_v3_1.c
@@ -102,10 +102,8 @@ static int psp_v3_1_bootloader_load_sysdrv(struct 
psp_context *psp)
        if (ret)
                return ret;
 
-       memset(psp->fw_pri_buf, 0, PSP_1_MEG);
-
        /* Copy PSP System Driver binary to memory */
-       memcpy(psp->fw_pri_buf, psp->sys_start_addr, psp->sys_bin_size);
+       psp_copy_fw(psp, psp->sys_start_addr, psp->sys_bin_size);
 
        /* Provide the sys driver to bootloader */
        WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_36,
@@ -143,10 +141,8 @@ static int psp_v3_1_bootloader_load_sos(struct psp_context 
*psp)
        if (ret)
                return ret;
 
-       memset(psp->fw_pri_buf, 0, PSP_1_MEG);
-
        /* Copy Secure OS binary to PSP memory */
-       memcpy(psp->fw_pri_buf, psp->sos_start_addr, psp->sos_bin_size);
+       psp_copy_fw(psp, psp->sos_start_addr, psp->sos_bin_size);
 
        /* Provide the PSP secure OS to bootloader */
        WREG32_SOC15(MP0, 0, mmMP0_SMN_C2PMSG_36,
diff --git a/drivers/gpu/drm/amd/amdgpu/vce_v4_0.c 
b/drivers/gpu/drm/amd/amdgpu/vce_v4_0.c
index 8e238dea7bef..90910d19db12 100644
--- a/drivers/gpu/drm/amd/amdgpu/vce_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vce_v4_0.c
@@ -25,6 +25,7 @@
  */
 
 #include <linux/firmware.h>
+#include <drm/drm_drv.h>
 
 #include "amdgpu.h"
 #include "amdgpu_vce.h"
@@ -555,16 +556,19 @@ static int vce_v4_0_hw_fini(void *handle)
 static int vce_v4_0_suspend(void *handle)
 {
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
-       int r;
+       int r, idx;
 
        if (adev->vce.vcpu_bo == NULL)
                return 0;
 
-       if (adev->firmware.load_type == AMDGPU_FW_LOAD_PSP) {
-               unsigned size = amdgpu_bo_size(adev->vce.vcpu_bo);
-               void *ptr = adev->vce.cpu_addr;
+       if (drm_dev_enter(&adev->ddev, &idx)) {
+               if (adev->firmware.load_type == AMDGPU_FW_LOAD_PSP) {
+                       unsigned size = amdgpu_bo_size(adev->vce.vcpu_bo);
+                       void *ptr = adev->vce.cpu_addr;
 
-               memcpy_fromio(adev->vce.saved_bo, ptr, size);
+                       memcpy_fromio(adev->vce.saved_bo, ptr, size);
+               }
+               drm_dev_exit(idx);
        }
 
        r = vce_v4_0_hw_fini(adev);
@@ -577,16 +581,20 @@ static int vce_v4_0_suspend(void *handle)
 static int vce_v4_0_resume(void *handle)
 {
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
-       int r;
+       int r, idx;
 
        if (adev->vce.vcpu_bo == NULL)
                return -EINVAL;
 
        if (adev->firmware.load_type == AMDGPU_FW_LOAD_PSP) {
-               unsigned size = amdgpu_bo_size(adev->vce.vcpu_bo);
-               void *ptr = adev->vce.cpu_addr;
 
-               memcpy_toio(ptr, adev->vce.saved_bo, size);
+               if (drm_dev_enter(&adev->ddev, &idx)) {
+                       unsigned size = amdgpu_bo_size(adev->vce.vcpu_bo);
+                       void *ptr = adev->vce.cpu_addr;
+
+                       memcpy_toio(ptr, adev->vce.saved_bo, size);
+                       drm_dev_exit(idx);
+               }
        } else {
                r = amdgpu_vce_resume(adev);
                if (r)
diff --git a/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c 
b/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c
index 3f15bf34123a..df34be8ec82d 100644
--- a/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c
@@ -34,6 +34,8 @@
 #include "vcn/vcn_3_0_0_sh_mask.h"
 #include "ivsrcid/vcn/irqsrcs_vcn_2_0.h"
 
+#include <drm/drm_drv.h>
+
 #define mmUVD_CONTEXT_ID_INTERNAL_OFFSET                       0x27
 #define mmUVD_GPCOM_VCPU_CMD_INTERNAL_OFFSET                   0x0f
 #define mmUVD_GPCOM_VCPU_DATA0_INTERNAL_OFFSET                 0x10
@@ -268,16 +270,20 @@ static int vcn_v3_0_sw_init(void *handle)
 static int vcn_v3_0_sw_fini(void *handle)
 {
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
-       int i, r;
+       int i, r, idx;
 
-       for (i = 0; i < adev->vcn.num_vcn_inst; i++) {
-               volatile struct amdgpu_fw_shared *fw_shared;
+       if (drm_dev_enter(&adev->ddev, &idx)) {
+               for (i = 0; i < adev->vcn.num_vcn_inst; i++) {
+                       volatile struct amdgpu_fw_shared *fw_shared;
 
-               if (adev->vcn.harvest_config & (1 << i))
-                       continue;
-               fw_shared = adev->vcn.inst[i].fw_shared_cpu_addr;
-               fw_shared->present_flag_0 = 0;
-               fw_shared->sw_ring.is_enabled = false;
+                       if (adev->vcn.harvest_config & (1 << i))
+                               continue;
+                       fw_shared = adev->vcn.inst[i].fw_shared_cpu_addr;
+                       fw_shared->present_flag_0 = 0;
+                       fw_shared->sw_ring.is_enabled = false;
+               }
+
+               drm_dev_exit(idx);
        }
 
        if (amdgpu_sriov_vf(adev))
diff --git a/drivers/gpu/drm/amd/pm/powerplay/smumgr/smu7_smumgr.c 
b/drivers/gpu/drm/amd/pm/powerplay/smumgr/smu7_smumgr.c
index aae25243eb10..d628b91846c9 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/smumgr/smu7_smumgr.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/smumgr/smu7_smumgr.c
@@ -405,6 +405,8 @@ int smu7_request_smu_load_fw(struct pp_hwmgr *hwmgr)
                                UCODE_ID_MEC_STORAGE, 
&toc->entry[toc->num_entries++]),
                                "Failed to Get Firmware Entry.", r = -EINVAL; 
goto failed);
        }
+
+       /* AG TODO Can't call drm_dev_enter/exit because access adev->ddev here 
... */
        memcpy_toio(smu_data->header_buffer.kaddr, smu_data->toc,
                    sizeof(struct SMU_DRAMData_TOC));
        smum_send_msg_to_smc_with_parameter(hwmgr,
-- 
2.25.1

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