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gpu: nvgpu: allocate from coherent pool

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Maps memory coherently on devices that are connected to a coherent bus.

(1) Add code to be able to get the platform device node.
(2) Create a new flag to mark if the device is connected to a coherent bus
(3) Map memory coherently on coherent devices.

bug 2040331

Change-Id: Ide83a9261acdbbc6e9fef4fc5f38d6f9d0e5ab5b
Signed-off-by: David Nieto <dmartineznie@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1633985
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Alex Waterman <alexw@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
David Nieto
2018-01-04 11:09:57 -08:00
committed by mobile promotions
parent 82f253b7c1
commit 6dde9e67d9
7 changed files with 38 additions and 4 deletions
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8
drivers/gpu/nvgpu/common/linux/pci.c
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@@ -21,6 +21,8 @@
#include <nvgpu/nvgpu_common.h>
#include <nvgpu/kmem.h>
#include <nvgpu/enabled.h>
#include <linux/of_platform.h>
#include <linux/of_address.h>
#include "gk20a/gk20a.h"
#include "clk/clk.h"
@@ -525,6 +527,7 @@ static int nvgpu_pci_probe(struct pci_dev *pdev,
struct gk20a *g;
int err;
char nodefmt[64];
struct device_node *np;
/* make sure driver_data is a sane index */
if (pent->driver_data >= sizeof(nvgpu_pci_device) /
@@ -632,6 +635,11 @@ static int nvgpu_pci_probe(struct pci_dev *pdev,
g->mm.has_physical_mode = false;
np = nvgpu_get_node(g);
if (of_dma_is_coherent(np))
__nvgpu_set_enabled(g, NVGPU_DMA_COHERENT, true);
return 0;
}