6.5-stable review patch. If anyone has any objections, please let me know.
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From: Stanislaw Gruszka stanislaw.gruszka@linux.intel.com
commit 610b5d219d1ccac8064556310cc0e62e3c202389 upstream.
This reverts commit 645d694559cab36fe6a57c717efcfa27d9321396.
The commit cause issues with memory access from the device side. Switch back to write-combined memory mappings until the issues will be properly addressed.
Add extra wmb() needed when boot_params->save_restore_ret_address() is modified.
Reviewed-by: Karol Wachowski karol.wachowski@linux.intel.com Signed-off-by: Stanislaw Gruszka stanislaw.gruszka@linux.intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20231017121353.532466-1-stanis... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/accel/ivpu/ivpu_fw.c | 9 ++++----- drivers/accel/ivpu/ivpu_gem.h | 5 ----- 2 files changed, 4 insertions(+), 10 deletions(-)
--- a/drivers/accel/ivpu/ivpu_fw.c +++ b/drivers/accel/ivpu/ivpu_fw.c @@ -195,8 +195,7 @@ static int ivpu_fw_mem_init(struct ivpu_ if (ret) return ret;
- fw->mem = ivpu_bo_alloc_internal(vdev, fw->runtime_addr, fw->runtime_size, - DRM_IVPU_BO_CACHED | DRM_IVPU_BO_NOSNOOP); + fw->mem = ivpu_bo_alloc_internal(vdev, fw->runtime_addr, fw->runtime_size, DRM_IVPU_BO_WC); if (!fw->mem) { ivpu_err(vdev, "Failed to allocate firmware runtime memory\n"); return -ENOMEM; @@ -273,7 +272,7 @@ int ivpu_fw_load(struct ivpu_device *vde memset(start, 0, size); }
- clflush_cache_range(fw->mem->kvaddr, fw->mem->base.size); + wmb(); /* Flush WC buffers after writing fw->mem */
return 0; } @@ -375,7 +374,7 @@ void ivpu_fw_boot_params_setup(struct iv if (!ivpu_fw_is_cold_boot(vdev)) { boot_params->save_restore_ret_address = 0; vdev->pm->is_warmboot = true; - clflush_cache_range(vdev->fw->mem->kvaddr, SZ_4K); + wmb(); /* Flush WC buffers after writing save_restore_ret_address */ return; }
@@ -430,7 +429,7 @@ void ivpu_fw_boot_params_setup(struct iv boot_params->punit_telemetry_sram_size = ivpu_hw_reg_telemetry_size_get(vdev); boot_params->vpu_telemetry_enable = ivpu_hw_reg_telemetry_enable_get(vdev);
- clflush_cache_range(vdev->fw->mem->kvaddr, SZ_4K); + wmb(); /* Flush WC buffers after writing bootparams */
ivpu_fw_boot_params_print(vdev, boot_params); } --- a/drivers/accel/ivpu/ivpu_gem.h +++ b/drivers/accel/ivpu/ivpu_gem.h @@ -8,8 +8,6 @@ #include <drm/drm_gem.h> #include <drm/drm_mm.h>
-#define DRM_IVPU_BO_NOSNOOP 0x10000000 - struct dma_buf; struct ivpu_bo_ops; struct ivpu_file_priv; @@ -85,9 +83,6 @@ static inline u32 ivpu_bo_cache_mode(str
static inline bool ivpu_bo_is_snooped(struct ivpu_bo *bo) { - if (bo->flags & DRM_IVPU_BO_NOSNOOP) - return false; - return ivpu_bo_cache_mode(bo) == DRM_IVPU_BO_CACHED; }