Store the struct device pointer used to allocate the DMA buffer in
the nvkm_gsp_mem object. This allows nvkm_gsp_mem_dtor() to release
the buffer without needing the nvkm_gsp. This is needed so that
we can retain DMA buffers even after the nvkm_gsp object is deleted.
Signed-off-by: Timur Tabi <ttabi@xxxxxxxxxx>
---
.../gpu/drm/nouveau/include/nvkm/subdev/gsp.h | 1 +
.../gpu/drm/nouveau/nvkm/subdev/gsp/r535.c | 50 ++++++++++++-------
2 files changed, 34 insertions(+), 17 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/include/nvkm/subdev/gsp.h b/drivers/gpu/drm/nouveau/include/nvkm/subdev/gsp.h
index 9e6f39912368..a45a4ad843b9 100644
--- a/drivers/gpu/drm/nouveau/include/nvkm/subdev/gsp.h
+++ b/drivers/gpu/drm/nouveau/include/nvkm/subdev/gsp.h
@@ -9,6 +9,7 @@
#define GSP_PAGE_SIZE BIT(GSP_PAGE_SHIFT)
struct nvkm_gsp_mem {
+ struct device *dev;
size_t size;
void *data;
dma_addr_t addr;
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/r535.c b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/r535.c
index cf58f9da9139..86450b0cd605 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/r535.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/gsp/r535.c
@@ -1000,7 +1000,7 @@ r535_gsp_rpc_get_gsp_static_info(struct nvkm_gsp *gsp)
}
static void
-nvkm_gsp_mem_dtor(struct nvkm_gsp *gsp, struct nvkm_gsp_mem *mem)
+nvkm_gsp_mem_dtor(struct nvkm_gsp_mem *mem)
{
if (mem->data) {
/*
@@ -1009,19 +1009,35 @@ nvkm_gsp_mem_dtor(struct nvkm_gsp *gsp, struct nvkm_gsp_mem *mem)
*/
memset(mem->data, 0xFF, mem->size);
- dma_free_coherent(gsp->subdev.device->dev, mem->size, mem->data, mem->addr);
+ dma_free_coherent(mem->dev, mem->size, mem->data, mem->addr);
+ put_device(mem->dev);
+
memset(mem, 0, sizeof(*mem));
}
}
+/**
+ * nvkm_gsp_mem_ctor - constructor for nvkm_gsp_mem objects
+ * @gsp: gsp pointer
+ * @size: number of bytes to allocate
+ * @mem: nvkm_gsp_mem object to initialize
+ *
+ * Allocates a block of memory for use with GSP.
+ *
+ * This memory block can potentially out-live the driver's remove() callback,
+ * so we take a device reference to ensure its lifetime. The reference is
+ * dropped in the destructor.
+ */
static int
nvkm_gsp_mem_ctor(struct nvkm_gsp *gsp, size_t size, struct nvkm_gsp_mem *mem)
{
- mem->size = size;
mem->data = dma_alloc_coherent(gsp->subdev.device->dev, size, &mem->addr, GFP_KERNEL);
if (WARN_ON(!mem->data))
return -ENOMEM;
+ mem->size = size;
+ mem->dev = get_device(gsp->subdev.device->dev);
+
return 0;
}
@@ -1054,8 +1070,8 @@ r535_gsp_postinit(struct nvkm_gsp *gsp)
nvkm_wr32(device, 0x110004, 0x00000040);
/* Release the DMA buffers that were needed only for boot and init */
- nvkm_gsp_mem_dtor(gsp, &gsp->boot.fw);
- nvkm_gsp_mem_dtor(gsp, &gsp->libos);
+ nvkm_gsp_mem_dtor(&gsp->boot.fw);
+ nvkm_gsp_mem_dtor(&gsp->libos);
return ret;
}
@@ -2234,8 +2250,8 @@ static void
nvkm_gsp_radix3_dtor(struct nvkm_gsp *gsp, struct nvkm_gsp_radix3 *rx3)
{
nvkm_gsp_sg_free(gsp->subdev.device, &rx3->lvl2);
- nvkm_gsp_mem_dtor(gsp, &rx3->lvl1);
- nvkm_gsp_mem_dtor(gsp, &rx3->lvl0);
+ nvkm_gsp_mem_dtor(&rx3->lvl1);
+ nvkm_gsp_mem_dtor(&rx3->lvl0);
}
/**
@@ -2323,9 +2339,9 @@ nvkm_gsp_radix3_sg(struct nvkm_gsp *gsp, struct sg_table *sgt, u64 size,
if (ret) {
lvl2_fail:
- nvkm_gsp_mem_dtor(gsp, &rx3->lvl1);
+ nvkm_gsp_mem_dtor(&rx3->lvl1);
lvl1_fail:
- nvkm_gsp_mem_dtor(gsp, &rx3->lvl0);
+ nvkm_gsp_mem_dtor(&rx3->lvl0);
}
return ret;
@@ -2417,7 +2433,7 @@ r535_gsp_init(struct nvkm_gsp *gsp)
done:
if (gsp->sr.meta.data) {
- nvkm_gsp_mem_dtor(gsp, &gsp->sr.meta);
+ nvkm_gsp_mem_dtor(&gsp->sr.meta);
nvkm_gsp_radix3_dtor(gsp, &gsp->sr.radix3);
nvkm_gsp_sg_free(gsp->subdev.device, &gsp->sr.sgt);
return ret;
@@ -2498,7 +2514,7 @@ r535_gsp_dtor(struct nvkm_gsp *gsp)
mutex_destroy(&gsp->client_id.mutex);
nvkm_gsp_radix3_dtor(gsp, &gsp->radix3);
- nvkm_gsp_mem_dtor(gsp, &gsp->sig);
+ nvkm_gsp_mem_dtor(&gsp->sig);
nvkm_firmware_dtor(&gsp->fw);
nvkm_falcon_fw_dtor(&gsp->booter.unload);
@@ -2509,12 +2525,12 @@ r535_gsp_dtor(struct nvkm_gsp *gsp)
r535_gsp_dtor_fws(gsp);
- nvkm_gsp_mem_dtor(gsp, &gsp->rmargs);
- nvkm_gsp_mem_dtor(gsp, &gsp->wpr_meta);
- nvkm_gsp_mem_dtor(gsp, &gsp->shm.mem);
- nvkm_gsp_mem_dtor(gsp, &gsp->loginit);
- nvkm_gsp_mem_dtor(gsp, &gsp->logintr);
- nvkm_gsp_mem_dtor(gsp, &gsp->logrm);
+ nvkm_gsp_mem_dtor(&gsp->rmargs);
+ nvkm_gsp_mem_dtor(&gsp->wpr_meta);
+ nvkm_gsp_mem_dtor(&gsp->shm.mem);
+ nvkm_gsp_mem_dtor(&gsp->loginit);
+ nvkm_gsp_mem_dtor(&gsp->logintr);
+ nvkm_gsp_mem_dtor(&gsp->logrm);
}
int
base-commit: 904bc5479896d8da7dcd3e162ce224c32c3dc6c3
prerequisite-patch-id: 6f7d619f67878dea2a3378e76e28d3c666921fbd
--
2.34.1
