Re: [PATCH v7 09/16] drm/amdgpu: Guard against write accesses after device removal

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On 2021-05-12 4:17 p.m., Alex Deucher wrote:
On Wed, May 12, 2021 at 10:27 AM Andrey Grodzovsky
<andrey.grodzovsky@xxxxxxx> wrote:

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

where

Protect IB submissions

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

v7:
Drop guard of HW ring commands emission protection since they
are in GART and not in MMIO.

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@xxxxxxx>

I think you could split out the psp_fw_copy changes as a separate
cleanup patch.  That's a nice clean up in general.  What about the SMU
code (e.g., amd/pm/powerplay and amd/pm/swsmu)?  There are a bunch of
shared memory areas we interact with in the driver.

Can you point me to it ? Are they VRAM and not GART ?
I searched for all memcpy_to/from_io in our code. Maybe missed some.

Andrey


Alex


---
  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 10 +++-
  drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c    |  9 ++++
  drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c    | 63 ++++++++++++++--------
  drivers/gpu/drm/amd/amdgpu/amdgpu_psp.h    |  2 +
  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 +++++---
  13 files changed, 168 insertions(+), 95 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index a0bff4713672..f7cca25c0fa0 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);
@@ -300,7 +305,7 @@ void amdgpu_device_vram_access(struct amdgpu_device *adev, loff_t pos,
                 }

                 if (count == size)
-                       return;
+                       goto exit;

                 pos += count;
                 buf += count / 4;
@@ -323,6 +328,9 @@ 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);
+
+exit:
+       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_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_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))
--
2.25.1




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