6.17-stable review patch. If anyone has any objections, please let me know.
------------------
From: Meng Li li.meng@amd.com
[ Upstream commit e6c2b0f23221ed43c4cc6f636e9ab7862954d562 ]
Add a new API amdgpu_xcp_drm_dev_free(). After unplug xcp device, need to release xcp drm memory etc.
Co-developed-by: Jiang Liu gerry@linux.alibaba.com Signed-off-by: Jiang Liu gerry@linux.alibaba.com Signed-off-by: Meng Li li.meng@amd.com Acked-by: Alex Deucher alexander.deucher@amd.com Reviewed-by: Lijo Lazar lijo.lazar@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c | 1 + drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c | 56 +++++++++++++++++---- drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.h | 1 + 3 files changed, 49 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c index c417f86892207..699acc1b46b59 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c @@ -406,6 +406,7 @@ void amdgpu_xcp_dev_unplug(struct amdgpu_device *adev) p_ddev->primary->dev = adev->xcp_mgr->xcp[i].pdev; p_ddev->driver = adev->xcp_mgr->xcp[i].driver; p_ddev->vma_offset_manager = adev->xcp_mgr->xcp[i].vma_offset_manager; + amdgpu_xcp_drm_dev_free(p_ddev); } }
diff --git a/drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c b/drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c index 8bc36f04b1b71..44009aa8216ed 100644 --- a/drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c +++ b/drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c @@ -46,18 +46,29 @@ static const struct drm_driver amdgpu_xcp_driver = {
static int8_t pdev_num; static struct xcp_device *xcp_dev[MAX_XCP_PLATFORM_DEVICE]; +static DEFINE_MUTEX(xcp_mutex);
int amdgpu_xcp_drm_dev_alloc(struct drm_device **ddev) { struct platform_device *pdev; struct xcp_device *pxcp_dev; char dev_name[20]; - int ret; + int ret, i; + + guard(mutex)(&xcp_mutex);
if (pdev_num >= MAX_XCP_PLATFORM_DEVICE) return -ENODEV;
- snprintf(dev_name, sizeof(dev_name), "amdgpu_xcp_%d", pdev_num); + for (i = 0; i < MAX_XCP_PLATFORM_DEVICE; i++) { + if (!xcp_dev[i]) + break; + } + + if (i >= MAX_XCP_PLATFORM_DEVICE) + return -ENODEV; + + snprintf(dev_name, sizeof(dev_name), "amdgpu_xcp_%d", i); pdev = platform_device_register_simple(dev_name, -1, NULL, 0); if (IS_ERR(pdev)) return PTR_ERR(pdev); @@ -73,8 +84,8 @@ int amdgpu_xcp_drm_dev_alloc(struct drm_device **ddev) goto out_devres; }
- xcp_dev[pdev_num] = pxcp_dev; - xcp_dev[pdev_num]->pdev = pdev; + xcp_dev[i] = pxcp_dev; + xcp_dev[i]->pdev = pdev; *ddev = &pxcp_dev->drm; pdev_num++;
@@ -89,16 +100,43 @@ int amdgpu_xcp_drm_dev_alloc(struct drm_device **ddev) } EXPORT_SYMBOL(amdgpu_xcp_drm_dev_alloc);
-void amdgpu_xcp_drv_release(void) +static void free_xcp_dev(int8_t index) { - for (--pdev_num; pdev_num >= 0; --pdev_num) { - struct platform_device *pdev = xcp_dev[pdev_num]->pdev; + if ((index < MAX_XCP_PLATFORM_DEVICE) && (xcp_dev[index])) { + struct platform_device *pdev = xcp_dev[index]->pdev;
devres_release_group(&pdev->dev, NULL); platform_device_unregister(pdev); - xcp_dev[pdev_num] = NULL; + + xcp_dev[index] = NULL; + pdev_num--; + } +} + +void amdgpu_xcp_drm_dev_free(struct drm_device *ddev) +{ + int8_t i; + + guard(mutex)(&xcp_mutex); + + for (i = 0; i < MAX_XCP_PLATFORM_DEVICE; i++) { + if ((xcp_dev[i]) && (&xcp_dev[i]->drm == ddev)) { + free_xcp_dev(i); + break; + } + } +} +EXPORT_SYMBOL(amdgpu_xcp_drm_dev_free); + +void amdgpu_xcp_drv_release(void) +{ + int8_t i; + + guard(mutex)(&xcp_mutex); + + for (i = 0; pdev_num && i < MAX_XCP_PLATFORM_DEVICE; i++) { + free_xcp_dev(i); } - pdev_num = 0; } EXPORT_SYMBOL(amdgpu_xcp_drv_release);
diff --git a/drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.h b/drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.h index c1c4b679bf95c..580a1602c8e36 100644 --- a/drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.h +++ b/drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.h @@ -25,5 +25,6 @@ #define _AMDGPU_XCP_DRV_H_
int amdgpu_xcp_drm_dev_alloc(struct drm_device **ddev); +void amdgpu_xcp_drm_dev_free(struct drm_device *ddev); void amdgpu_xcp_drv_release(void); #endif /* _AMDGPU_XCP_DRV_H_ */