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Message-Id: <20190524023719.1495-1-cai@lca.pw>
Date: Thu, 23 May 2019 22:37:19 -0400
From: Qian Cai <cai@....pw>
To: airlied@...ux.ie, daniel@...ll.ch
Cc: thellstrom@...are.com, hch@....de, m.szyprowski@...sung.com,
robin.murphy@....com, linux-graphics-maintainer@...are.com,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
Qian Cai <cai@....pw>
Subject: [PATCH] drm/vmwgfx: fix a warning due to missing dma_parms
Booting up with DMA_API_DEBUG_SG=y generates a warning below due to the
driver forgot to set dma_parms appropriately. Set it after
vmw_dma_masks(), so it can choose a size either DMA_BIT_MASK(64) or
DMA_BIT_MASK(44).
DMA-API: vmwgfx 0000:00:0f.0: mapping sg segment longer than device
claims to support [len=2097152] [max=65536]
WARNING: CPU: 2 PID: 261 at kernel/dma/debug.c:1232
debug_dma_map_sg+0x360/0x480
Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop
Reference Platform, BIOS 6.00 04/13/2018
RIP: 0010:debug_dma_map_sg+0x360/0x480
Call Trace:
vmw_ttm_map_dma+0x3b1/0x5b0 [vmwgfx]
vmw_bo_map_dma+0x25/0x30 [vmwgfx]
vmw_otables_setup+0x2a8/0x750 [vmwgfx]
vmw_request_device_late+0x78/0xc0 [vmwgfx]
vmw_request_device+0xee/0x4e0 [vmwgfx]
vmw_driver_load.cold+0x757/0xd84 [vmwgfx]
drm_dev_register+0x1ff/0x340 [drm]
drm_get_pci_dev+0x110/0x290 [drm]
vmw_probe+0x15/0x20 [vmwgfx]
local_pci_probe+0x7a/0xc0
pci_device_probe+0x1b9/0x290
really_probe+0x1b5/0x630
driver_probe_device+0xa3/0x1a0
device_driver_attach+0x94/0xa0
__driver_attach+0xdd/0x1c0
bus_for_each_dev+0xfe/0x150
driver_attach+0x2d/0x40
bus_add_driver+0x290/0x350
driver_register+0xdc/0x1d0
__pci_register_driver+0xda/0xf0
vmwgfx_init+0x34/0x1000 [vmwgfx]
do_one_initcall+0xe5/0x40a
do_init_module+0x10f/0x3a0
load_module+0x16a5/0x1a40
__se_sys_finit_module+0x183/0x1c0
__x64_sys_finit_module+0x43/0x50
do_syscall_64+0xc8/0x606
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Fixes: fb1d9738ca05 ("drm/vmwgfx: Add DRM driver for VMware Virtual GPU")
Signed-off-by: Qian Cai <cai@....pw>
---
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 20 ++++++++++++++++----
1 file changed, 16 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index bf6c3500d363..5c567b81174f 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -747,6 +747,13 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
if (unlikely(ret != 0))
goto out_err0;
+ dev->dev->dma_parms = kzalloc(sizeof(*dev->dev->dma_parms),
+ GFP_KERNEL);
+ if (!dev->dev->dma_parms)
+ goto out_err0;
+
+ dma_set_max_seg_size(dev->dev, *dev->dev->dma_mask);
+
if (dev_priv->capabilities & SVGA_CAP_GMR2) {
DRM_INFO("Max GMR ids is %u\n",
(unsigned)dev_priv->max_gmr_ids);
@@ -772,7 +779,7 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
if (unlikely(dev_priv->mmio_virt == NULL)) {
ret = -ENOMEM;
DRM_ERROR("Failed mapping MMIO.\n");
- goto out_err0;
+ goto out_err1;
}
/* Need mmio memory to check for fifo pitchlock cap. */
@@ -781,7 +788,7 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
!vmw_fifo_have_pitchlock(dev_priv)) {
ret = -ENOSYS;
DRM_ERROR("Hardware has no pitchlock\n");
- goto out_err4;
+ goto out_err2;
}
dev_priv->tdev = ttm_object_device_init(&ttm_mem_glob, 12,
@@ -790,7 +797,7 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
if (unlikely(dev_priv->tdev == NULL)) {
DRM_ERROR("Unable to initialize TTM object management.\n");
ret = -ENOMEM;
- goto out_err4;
+ goto out_err2;
}
dev->dev_private = dev_priv;
@@ -944,8 +951,11 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
pci_release_regions(dev->pdev);
out_no_device:
ttm_object_device_release(&dev_priv->tdev);
-out_err4:
+out_err2:
memunmap(dev_priv->mmio_virt);
+out_err1:
+ kfree(dev->dev->dma_parms);
+ dev->dev->dma_parms = NULL;
out_err0:
for (i = vmw_res_context; i < vmw_res_max; ++i)
idr_destroy(&dev_priv->res_idr[i]);
@@ -995,6 +1005,8 @@ static void vmw_driver_unload(struct drm_device *dev)
ttm_object_device_release(&dev_priv->tdev);
memunmap(dev_priv->mmio_virt);
+ kfree(dev->dev->dma_parms);
+ dev->dev->dma_parms = NULL;
if (dev_priv->ctx.staged_bindings)
vmw_binding_state_free(dev_priv->ctx.staged_bindings);
--
2.20.1 (Apple Git-117)
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