[PATCH 21/34] drm/i915/gvt: devirtualize ->dma_{,un}map_guest_page

From: Christoph Hellwig
Date: Mon Apr 11 2022 - 10:16:37 EST

Just call the functions directly. Also remove a pointless wrapper.

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
drivers/gpu/drm/i915/gvt/dmabuf.c | 10 ++--------
drivers/gpu/drm/i915/gvt/gtt.c | 20 +++++++++----------
drivers/gpu/drm/i915/gvt/gvt.h | 4 ++++
drivers/gpu/drm/i915/gvt/hypercall.h | 5 -----
drivers/gpu/drm/i915/gvt/kvmgt.c | 6 ++----
drivers/gpu/drm/i915/gvt/mpt.h | 29 ----------------------------
6 files changed, 17 insertions(+), 57 deletions(-)

diff --git a/drivers/gpu/drm/i915/gvt/dmabuf.c b/drivers/gpu/drm/i915/gvt/dmabuf.c
index cc1a9ac0d2720..db93b63543276 100644
--- a/drivers/gpu/drm/i915/gvt/dmabuf.c
+++ b/drivers/gpu/drm/i915/gvt/dmabuf.c
@@ -54,12 +54,6 @@ static int vgpu_pin_dma_address(struct intel_vgpu *vgpu,
return ret;
}

-static void vgpu_unpin_dma_address(struct intel_vgpu *vgpu,
- dma_addr_t dma_addr)
-{
- intel_gvt_hypervisor_dma_unmap_guest_page(vgpu, dma_addr);
-}
-
static int vgpu_gem_get_pages(
struct drm_i915_gem_object *obj)
{
@@ -114,7 +108,7 @@ static int vgpu_gem_get_pages(
for_each_sg(st->sgl, sg, i, j) {
dma_addr = sg_dma_address(sg);
if (dma_addr)
- vgpu_unpin_dma_address(vgpu, dma_addr);
+ intel_gvt_dma_unmap_guest_page(vgpu, dma_addr);
}
sg_free_table(st);
kfree(st);
@@ -136,7 +130,7 @@ static void vgpu_gem_put_pages(struct drm_i915_gem_object *obj,
int i;

for_each_sg(pages->sgl, sg, fb_info->size, i)
- vgpu_unpin_dma_address(vgpu,
+ intel_gvt_dma_unmap_guest_page(vgpu,
sg_dma_address(sg));
}

diff --git a/drivers/gpu/drm/i915/gvt/gtt.c b/drivers/gpu/drm/i915/gvt/gtt.c
index f6f3b22a70d26..9c5cc28009758 100644
--- a/drivers/gpu/drm/i915/gvt/gtt.c
+++ b/drivers/gpu/drm/i915/gvt/gtt.c
@@ -1013,7 +1013,7 @@ static inline void ppgtt_invalidate_pte(struct intel_vgpu_ppgtt_spt *spt,
if (!pfn || pfn == vgpu->gtt.scratch_pt[type].page_mfn)
return;

- intel_gvt_hypervisor_dma_unmap_guest_page(vgpu, pfn << PAGE_SHIFT);
+ intel_gvt_dma_unmap_guest_page(vgpu, pfn << PAGE_SHIFT);
}

static int ppgtt_invalidate_spt(struct intel_vgpu_ppgtt_spt *spt)
@@ -1212,8 +1212,8 @@ static int split_2MB_gtt_entry(struct intel_vgpu *vgpu,
return PTR_ERR(sub_spt);

for_each_shadow_entry(sub_spt, &sub_se, sub_index) {
- ret = intel_gvt_hypervisor_dma_map_guest_page(vgpu,
- start_gfn + sub_index, PAGE_SIZE, &dma_addr);
+ ret = intel_gvt_dma_map_guest_page(vgpu, start_gfn + sub_index,
+ PAGE_SIZE, &dma_addr);
if (ret) {
ppgtt_invalidate_spt(spt);
return ret;
@@ -1258,8 +1258,8 @@ static int split_64KB_gtt_entry(struct intel_vgpu *vgpu,
ops->set_64k_splited(&entry);

for (i = 0; i < GTT_64K_PTE_STRIDE; i++) {
- ret = intel_gvt_hypervisor_dma_map_guest_page(vgpu,
- start_gfn + i, PAGE_SIZE, &dma_addr);
+ ret = intel_gvt_dma_map_guest_page(vgpu, start_gfn + i,
+ PAGE_SIZE, &dma_addr);
if (ret)
return ret;

@@ -1313,8 +1313,7 @@ static int ppgtt_populate_shadow_entry(struct intel_vgpu *vgpu,
}

/* direct shadow */
- ret = intel_gvt_hypervisor_dma_map_guest_page(vgpu, gfn, page_size,
- &dma_addr);
+ ret = intel_gvt_dma_map_guest_page(vgpu, gfn, page_size, &dma_addr);
if (ret)
return -ENXIO;

@@ -2245,8 +2244,7 @@ static void ggtt_invalidate_pte(struct intel_vgpu *vgpu,

pfn = pte_ops->get_pfn(entry);
if (pfn != vgpu->gvt->gtt.scratch_mfn)
- intel_gvt_hypervisor_dma_unmap_guest_page(vgpu,
- pfn << PAGE_SHIFT);
+ intel_gvt_dma_unmap_guest_page(vgpu, pfn << PAGE_SHIFT);
}

static int emulate_ggtt_mmio_write(struct intel_vgpu *vgpu, unsigned int off,
@@ -2337,8 +2335,8 @@ static int emulate_ggtt_mmio_write(struct intel_vgpu *vgpu, unsigned int off,
goto out;
}

- ret = intel_gvt_hypervisor_dma_map_guest_page(vgpu, gfn,
- PAGE_SIZE, &dma_addr);
+ ret = intel_gvt_dma_map_guest_page(vgpu, gfn, PAGE_SIZE,
+ &dma_addr);
if (ret) {
gvt_vgpu_err("fail to populate guest ggtt entry\n");
/* guest driver may read/write the entry when partial
diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h
index a8a8728cd54a8..4e42e6ac40772 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.h
+++ b/drivers/gpu/drm/i915/gvt/gvt.h
@@ -767,6 +767,10 @@ void intel_gvt_debugfs_clean(struct intel_gvt *gvt);

int intel_gvt_page_track_add(struct intel_vgpu *info, u64 gfn);
int intel_gvt_page_track_remove(struct intel_vgpu *info, u64 gfn);
+int intel_gvt_dma_map_guest_page(struct intel_vgpu *vgpu, unsigned long gfn,
+ unsigned long size, dma_addr_t *dma_addr);
+void intel_gvt_dma_unmap_guest_page(struct intel_vgpu *vgpu,
+ dma_addr_t dma_addr);

#include "trace.h"
#include "mpt.h"
diff --git a/drivers/gpu/drm/i915/gvt/hypercall.h b/drivers/gpu/drm/i915/gvt/hypercall.h
index ded13a63ab663..ba03b3368a955 100644
--- a/drivers/gpu/drm/i915/gvt/hypercall.h
+++ b/drivers/gpu/drm/i915/gvt/hypercall.h
@@ -46,11 +46,6 @@ struct intel_gvt_mpt {
int (*host_init)(struct device *dev, void *gvt);
void (*host_exit)(struct device *dev, void *gvt);

- int (*dma_map_guest_page)(struct intel_vgpu *vgpu, unsigned long gfn,
- unsigned long size, dma_addr_t *dma_addr);
- void (*dma_unmap_guest_page)(struct intel_vgpu *vgpu,
- dma_addr_t dma_addr);
-
int (*dma_pin_guest_page)(struct intel_vgpu *vgpu, dma_addr_t dma_addr);
};

diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index fbef3d3dfb1f5..a02274036487f 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -1874,7 +1874,7 @@ void intel_vgpu_detach_regions(struct intel_vgpu *vgpu)
vgpu->region = NULL;
}

-static int kvmgt_dma_map_guest_page(struct intel_vgpu *vgpu, unsigned long gfn,
+int intel_gvt_dma_map_guest_page(struct intel_vgpu *vgpu, unsigned long gfn,
unsigned long size, dma_addr_t *dma_addr)
{
struct gvt_dma *entry;
@@ -1950,7 +1950,7 @@ static void __gvt_dma_release(struct kref *ref)
__gvt_cache_remove_entry(entry->vgpu, entry);
}

-static void kvmgt_dma_unmap_guest_page(struct intel_vgpu *vgpu,
+void intel_gvt_dma_unmap_guest_page(struct intel_vgpu *vgpu,
dma_addr_t dma_addr)
{
struct gvt_dma *entry;
@@ -1968,8 +1968,6 @@ static void kvmgt_dma_unmap_guest_page(struct intel_vgpu *vgpu,
static const struct intel_gvt_mpt kvmgt_mpt = {
.host_init = kvmgt_host_init,
.host_exit = kvmgt_host_exit,
- .dma_map_guest_page = kvmgt_dma_map_guest_page,
- .dma_unmap_guest_page = kvmgt_dma_unmap_guest_page,
.dma_pin_guest_page = kvmgt_dma_pin_guest_page,
};

diff --git a/drivers/gpu/drm/i915/gvt/mpt.h b/drivers/gpu/drm/i915/gvt/mpt.h
index d2723ac8bb044..26c1ee690f7e9 100644
--- a/drivers/gpu/drm/i915/gvt/mpt.h
+++ b/drivers/gpu/drm/i915/gvt/mpt.h
@@ -71,35 +71,6 @@ static inline void intel_gvt_hypervisor_host_exit(struct device *dev, void *gvt)
intel_gvt_host.mpt->host_exit(dev, gvt);
}

-/**
- * intel_gvt_hypervisor_dma_map_guest_page - setup dma map for guest page
- * @vgpu: a vGPU
- * @gfn: guest pfn
- * @size: page size
- * @dma_addr: retrieve allocated dma addr
- *
- * Returns:
- * 0 on success, negative error code if failed.
- */
-static inline int intel_gvt_hypervisor_dma_map_guest_page(
- struct intel_vgpu *vgpu, unsigned long gfn, unsigned long size,
- dma_addr_t *dma_addr)
-{
- return intel_gvt_host.mpt->dma_map_guest_page(vgpu, gfn, size,
- dma_addr);
-}
-
-/**
- * intel_gvt_hypervisor_dma_unmap_guest_page - cancel dma map for guest page
- * @vgpu: a vGPU
- * @dma_addr: the mapped dma addr
- */
-static inline void intel_gvt_hypervisor_dma_unmap_guest_page(
- struct intel_vgpu *vgpu, dma_addr_t dma_addr)
-{
- intel_gvt_host.mpt->dma_unmap_guest_page(vgpu, dma_addr);
-}
-
/**
* intel_gvt_hypervisor_dma_pin_guest_page - pin guest dma buf
* @vgpu: a vGPU
--
2.30.2