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Message-Id: <20210721155355.173183-12-hch@lst.de>
Date: Wed, 21 Jul 2021 17:53:45 +0200
From: Christoph Hellwig <hch@....de>
To: Jani Nikula <jani.nikula@...ux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@...el.com>,
Zhenyu Wang <zhenyuw@...ux.intel.com>,
Zhi Wang <zhi.a.wang@...el.com>
Cc: intel-gfx@...ts.freedesktop.org,
intel-gvt-dev@...ts.freedesktop.org,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH 11/21] drm/i915/gvt: devirtualize ->{read,write}_gpa
Just call the VFIO functions directly instead of through the method
table.
Signed-off-by: Christoph Hellwig <hch@....de>
---
drivers/gpu/drm/i915/gvt/cmd_parser.c | 4 +--
drivers/gpu/drm/i915/gvt/execlist.c | 12 ++++-----
drivers/gpu/drm/i915/gvt/gtt.c | 6 ++---
drivers/gpu/drm/i915/gvt/gvt.h | 37 +++++++++++++++++++++++++++
drivers/gpu/drm/i915/gvt/hypercall.h | 4 ---
drivers/gpu/drm/i915/gvt/kvmgt.c | 23 -----------------
drivers/gpu/drm/i915/gvt/mmio.c | 4 +--
drivers/gpu/drm/i915/gvt/mpt.h | 32 -----------------------
drivers/gpu/drm/i915/gvt/opregion.c | 10 +++-----
drivers/gpu/drm/i915/gvt/scheduler.c | 37 +++++++++++++--------------
10 files changed, 72 insertions(+), 97 deletions(-)
diff --git a/drivers/gpu/drm/i915/gvt/cmd_parser.c b/drivers/gpu/drm/i915/gvt/cmd_parser.c
index c4118b808268..c694d2c5efdd 100644
--- a/drivers/gpu/drm/i915/gvt/cmd_parser.c
+++ b/drivers/gpu/drm/i915/gvt/cmd_parser.c
@@ -1009,7 +1009,7 @@ static int cmd_reg_handler(struct parser_exec_state *s,
if (GRAPHICS_VER(s->engine->i915) == 9 &&
intel_gvt_mmio_is_sr_in_ctx(gvt, offset) &&
!strncmp(cmd, "lri", 3)) {
- intel_gvt_hypervisor_read_gpa(s->vgpu,
+ intel_gvt_read_gpa(s->vgpu,
s->workload->ring_context_gpa + 12, &ctx_sr_ctl, 4);
/* check inhibit context */
if (ctx_sr_ctl & 1) {
@@ -1773,7 +1773,7 @@ static int copy_gma_to_hva(struct intel_vgpu *vgpu, struct intel_vgpu_mm *mm,
copy_len = (end_gma - gma) >= (I915_GTT_PAGE_SIZE - offset) ?
I915_GTT_PAGE_SIZE - offset : end_gma - gma;
- intel_gvt_hypervisor_read_gpa(vgpu, gpa, va + len, copy_len);
+ intel_gvt_read_gpa(vgpu, gpa, va + len, copy_len);
len += copy_len;
gma += copy_len;
diff --git a/drivers/gpu/drm/i915/gvt/execlist.c b/drivers/gpu/drm/i915/gvt/execlist.c
index c8dcda6d4f0d..a3e15e7a8375 100644
--- a/drivers/gpu/drm/i915/gvt/execlist.c
+++ b/drivers/gpu/drm/i915/gvt/execlist.c
@@ -159,12 +159,12 @@ static void emulate_csb_update(struct intel_vgpu_execlist *execlist,
hwsp_gpa = intel_vgpu_gma_to_gpa(vgpu->gtt.ggtt_mm,
vgpu->hws_pga[execlist->engine->id]);
if (hwsp_gpa != INTEL_GVT_INVALID_ADDR) {
- intel_gvt_hypervisor_write_gpa(vgpu,
- hwsp_gpa + I915_HWS_CSB_BUF0_INDEX * 4 + write_pointer * 8,
- status, 8);
- intel_gvt_hypervisor_write_gpa(vgpu,
- hwsp_gpa + intel_hws_csb_write_index(execlist->engine->i915) * 4,
- &write_pointer, 4);
+ intel_gvt_write_gpa(vgpu,
+ hwsp_gpa + I915_HWS_CSB_BUF0_INDEX * 4 + write_pointer * 8,
+ status, 8);
+ intel_gvt_write_gpa(vgpu,
+ hwsp_gpa + intel_hws_csb_write_index(execlist->engine->i915) * 4,
+ &write_pointer, 4);
}
gvt_dbg_el("vgpu%d: w pointer %u reg %x csb l %x csb h %x\n",
diff --git a/drivers/gpu/drm/i915/gvt/gtt.c b/drivers/gpu/drm/i915/gvt/gtt.c
index cc2c05e18206..0a953ab7a38b 100644
--- a/drivers/gpu/drm/i915/gvt/gtt.c
+++ b/drivers/gpu/drm/i915/gvt/gtt.c
@@ -312,7 +312,7 @@ static inline int gtt_get_entry64(void *pt,
return -EINVAL;
if (hypervisor_access) {
- ret = intel_gvt_hypervisor_read_gpa(vgpu, gpa +
+ ret = intel_gvt_read_gpa(vgpu, gpa +
(index << info->gtt_entry_size_shift),
&e->val64, 8);
if (WARN_ON(ret))
@@ -337,7 +337,7 @@ static inline int gtt_set_entry64(void *pt,
return -EINVAL;
if (hypervisor_access) {
- ret = intel_gvt_hypervisor_write_gpa(vgpu, gpa +
+ ret = intel_gvt_write_gpa(vgpu, gpa +
(index << info->gtt_entry_size_shift),
&e->val64, 8);
if (WARN_ON(ret))
@@ -1495,7 +1495,7 @@ static int attach_oos_page(struct intel_vgpu_oos_page *oos_page,
struct intel_gvt *gvt = spt->vgpu->gvt;
int ret;
- ret = intel_gvt_hypervisor_read_gpa(spt->vgpu,
+ ret = intel_gvt_read_gpa(spt->vgpu,
spt->guest_page.gfn << I915_GTT_PAGE_SHIFT,
oos_page->mem, I915_GTT_PAGE_SIZE);
if (ret)
diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h
index ad10ef2377e7..e604d6f6d06a 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.h
+++ b/drivers/gpu/drm/i915/gvt/gvt.h
@@ -35,6 +35,7 @@
#include <uapi/linux/pci_regs.h>
#include <linux/kvm_host.h>
+#include <linux/vfio.h>
#include "i915_drv.h"
@@ -719,6 +720,42 @@ static inline bool intel_gvt_mmio_is_cmd_write_patch(
return gvt->mmio.mmio_attribute[offset >> 2] & F_CMD_WRITE_PATCH;
}
+/**
+ * intel_gvt_read_gpa - copy data from GPA to host data buffer
+ * @vgpu: a vGPU
+ * @gpa: guest physical address
+ * @buf: host data buffer
+ * @len: data length
+ *
+ * Returns:
+ * Zero on success, negative error code if failed.
+ */
+static inline int intel_gvt_read_gpa(struct intel_vgpu *vgpu, unsigned long gpa,
+ void *buf, unsigned long len)
+{
+ if (!vgpu->attached)
+ return -ESRCH;
+ return vfio_dma_rw(vgpu->vfio_group, gpa, buf, len, false);
+}
+
+/**
+ * intel_gvt_write_gpa - copy data from host data buffer to GPA
+ * @vgpu: a vGPU
+ * @gpa: guest physical address
+ * @buf: host data buffer
+ * @len: data length
+ *
+ * Returns:
+ * Zero on success, negative error code if failed.
+ */
+static inline int intel_gvt_write_gpa(struct intel_vgpu *vgpu,
+ unsigned long gpa, void *buf, unsigned long len)
+{
+ if (!vgpu->attached)
+ return -ESRCH;
+ return vfio_dma_rw(vgpu->vfio_group, gpa, buf, len, true);
+}
+
void intel_gvt_debugfs_remove_vgpu(struct intel_vgpu *vgpu);
void intel_gvt_debugfs_init(struct intel_gvt *gvt);
void intel_gvt_debugfs_clean(struct intel_gvt *gvt);
diff --git a/drivers/gpu/drm/i915/gvt/hypercall.h b/drivers/gpu/drm/i915/gvt/hypercall.h
index 9f0475759825..61e493e2de85 100644
--- a/drivers/gpu/drm/i915/gvt/hypercall.h
+++ b/drivers/gpu/drm/i915/gvt/hypercall.h
@@ -49,10 +49,6 @@ struct intel_gvt_mpt {
int (*inject_msi)(struct intel_vgpu *vgpu, u32 addr, u16 data);
int (*enable_page_track)(struct intel_vgpu *vgpu, u64 gfn);
int (*disable_page_track)(struct intel_vgpu *vgpu, u64 gfn);
- int (*read_gpa)(struct intel_vgpu *vgpu, unsigned long gpa, void *buf,
- unsigned long len);
- int (*write_gpa)(struct intel_vgpu *vgpu, unsigned long gpa, void *buf,
- unsigned long len);
unsigned long (*gfn_to_mfn)(struct intel_vgpu *vgpu, unsigned long gfn);
int (*dma_map_guest_page)(struct intel_vgpu *vgpu, unsigned long gfn,
diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index bd08c2927c75..7b588a371adb 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -39,7 +39,6 @@
#include <linux/spinlock.h>
#include <linux/eventfd.h>
#include <linux/uuid.h>
-#include <linux/vfio.h>
#include <linux/mdev.h>
#include <linux/debugfs.h>
@@ -2005,26 +2004,6 @@ static void kvmgt_dma_unmap_guest_page(struct intel_vgpu *vgpu,
mutex_unlock(&vgpu->cache_lock);
}
-static int kvmgt_rw_gpa(struct intel_vgpu *vgpu, unsigned long gpa,
- void *buf, unsigned long len, bool write)
-{
- if (!vgpu->attached)
- return -ESRCH;
- return vfio_dma_rw(vgpu->vfio_group, gpa, buf, len, write);
-}
-
-static int kvmgt_read_gpa(struct intel_vgpu *vgpu, unsigned long gpa,
- void *buf, unsigned long len)
-{
- return kvmgt_rw_gpa(vgpu, gpa, buf, len, false);
-}
-
-static int kvmgt_write_gpa(struct intel_vgpu *vgpu, unsigned long gpa,
- void *buf, unsigned long len)
-{
- return kvmgt_rw_gpa(vgpu, gpa, buf, len, true);
-}
-
static bool kvmgt_is_valid_gfn(struct intel_vgpu *vgpu, unsigned long gfn)
{
struct kvm *kvm = vgpu->kvm;
@@ -2048,8 +2027,6 @@ static const struct intel_gvt_mpt kvmgt_mpt = {
.inject_msi = kvmgt_inject_msi,
.enable_page_track = kvmgt_page_track_add,
.disable_page_track = kvmgt_page_track_remove,
- .read_gpa = kvmgt_read_gpa,
- .write_gpa = kvmgt_write_gpa,
.gfn_to_mfn = kvmgt_gfn_to_pfn,
.dma_map_guest_page = kvmgt_dma_map_guest_page,
.dma_unmap_guest_page = kvmgt_dma_unmap_guest_page,
diff --git a/drivers/gpu/drm/i915/gvt/mmio.c b/drivers/gpu/drm/i915/gvt/mmio.c
index 24210b1eaec5..464a2ae1a83c 100644
--- a/drivers/gpu/drm/i915/gvt/mmio.c
+++ b/drivers/gpu/drm/i915/gvt/mmio.c
@@ -136,7 +136,7 @@ int intel_vgpu_emulate_mmio_read(struct intel_vgpu *vgpu, u64 pa,
}
if (drm_WARN_ON_ONCE(&i915->drm, !reg_is_mmio(gvt, offset))) {
- ret = intel_gvt_hypervisor_read_gpa(vgpu, pa, p_data, bytes);
+ ret = intel_gvt_read_gpa(vgpu, pa, p_data, bytes);
goto out;
}
@@ -212,7 +212,7 @@ int intel_vgpu_emulate_mmio_write(struct intel_vgpu *vgpu, u64 pa,
}
if (drm_WARN_ON_ONCE(&i915->drm, !reg_is_mmio(gvt, offset))) {
- ret = intel_gvt_hypervisor_write_gpa(vgpu, pa, p_data, bytes);
+ ret = intel_gvt_write_gpa(vgpu, pa, p_data, bytes);
goto out;
}
diff --git a/drivers/gpu/drm/i915/gvt/mpt.h b/drivers/gpu/drm/i915/gvt/mpt.h
index ba0c31c4a705..72388ceec596 100644
--- a/drivers/gpu/drm/i915/gvt/mpt.h
+++ b/drivers/gpu/drm/i915/gvt/mpt.h
@@ -152,38 +152,6 @@ static inline int intel_gvt_hypervisor_disable_page_track(
return intel_gvt_host.mpt->disable_page_track(vgpu, gfn);
}
-/**
- * intel_gvt_hypervisor_read_gpa - copy data from GPA to host data buffer
- * @vgpu: a vGPU
- * @gpa: guest physical address
- * @buf: host data buffer
- * @len: data length
- *
- * Returns:
- * Zero on success, negative error code if failed.
- */
-static inline int intel_gvt_hypervisor_read_gpa(struct intel_vgpu *vgpu,
- unsigned long gpa, void *buf, unsigned long len)
-{
- return intel_gvt_host.mpt->read_gpa(vgpu, gpa, buf, len);
-}
-
-/**
- * intel_gvt_hypervisor_write_gpa - copy data from host data buffer to GPA
- * @vgpu: a vGPU
- * @gpa: guest physical address
- * @buf: host data buffer
- * @len: data length
- *
- * Returns:
- * Zero on success, negative error code if failed.
- */
-static inline int intel_gvt_hypervisor_write_gpa(struct intel_vgpu *vgpu,
- unsigned long gpa, void *buf, unsigned long len)
-{
- return intel_gvt_host.mpt->write_gpa(vgpu, gpa, buf, len);
-}
-
/**
* intel_gvt_hypervisor_gfn_to_mfn - translate a GFN to MFN
* @vgpu: a vGPU
diff --git a/drivers/gpu/drm/i915/gvt/opregion.c b/drivers/gpu/drm/i915/gvt/opregion.c
index 286ac6d7c6ce..d2bed466540a 100644
--- a/drivers/gpu/drm/i915/gvt/opregion.c
+++ b/drivers/gpu/drm/i915/gvt/opregion.c
@@ -421,14 +421,14 @@ int intel_vgpu_emulate_opregion_request(struct intel_vgpu *vgpu, u32 swsci)
INTEL_GVT_OPREGION_SCIC;
parm_pa = (vgpu_opregion(vgpu)->gfn[0] << PAGE_SHIFT) +
INTEL_GVT_OPREGION_PARM;
- ret = intel_gvt_hypervisor_read_gpa(vgpu, scic_pa, &scic, sizeof(scic));
+ ret = intel_gvt_read_gpa(vgpu, scic_pa, &scic, sizeof(scic));
if (ret) {
gvt_vgpu_err("guest opregion read error %d, gpa 0x%llx, len %lu\n",
ret, scic_pa, sizeof(scic));
return ret;
}
- ret = intel_gvt_hypervisor_read_gpa(vgpu, parm_pa, &parm, sizeof(parm));
+ ret = intel_gvt_read_gpa(vgpu, parm_pa, &parm, sizeof(parm));
if (ret) {
gvt_vgpu_err("guest opregion read error %d, gpa 0x%llx, len %lu\n",
ret, scic_pa, sizeof(scic));
@@ -465,16 +465,14 @@ int intel_vgpu_emulate_opregion_request(struct intel_vgpu *vgpu, u32 swsci)
parm = 0;
out:
- ret = intel_gvt_hypervisor_write_gpa(vgpu, scic_pa, &scic,
- sizeof(scic));
+ ret = intel_gvt_write_gpa(vgpu, scic_pa, &scic, sizeof(scic));
if (ret) {
gvt_vgpu_err("guest opregion write error %d, gpa 0x%llx, len %lu\n",
ret, scic_pa, sizeof(scic));
return ret;
}
- ret = intel_gvt_hypervisor_write_gpa(vgpu, parm_pa, &parm,
- sizeof(parm));
+ ret = intel_gvt_write_gpa(vgpu, parm_pa, &parm, sizeof(parm));
if (ret) {
gvt_vgpu_err("guest opregion write error %d, gpa 0x%llx, len %lu\n",
ret, scic_pa, sizeof(scic));
diff --git a/drivers/gpu/drm/i915/gvt/scheduler.c b/drivers/gpu/drm/i915/gvt/scheduler.c
index 734c37c5e347..801b9168feb5 100644
--- a/drivers/gpu/drm/i915/gvt/scheduler.c
+++ b/drivers/gpu/drm/i915/gvt/scheduler.c
@@ -148,10 +148,10 @@ static int populate_shadow_context(struct intel_vgpu_workload *workload)
sr_oa_regs(workload, (u32 *)shadow_ring_context, true);
#define COPY_REG(name) \
- intel_gvt_hypervisor_read_gpa(vgpu, workload->ring_context_gpa \
+ intel_gvt_read_gpa(vgpu, workload->ring_context_gpa \
+ RING_CTX_OFF(name.val), &shadow_ring_context->name.val, 4)
#define COPY_REG_MASKED(name) {\
- intel_gvt_hypervisor_read_gpa(vgpu, workload->ring_context_gpa \
+ intel_gvt_read_gpa(vgpu, workload->ring_context_gpa \
+ RING_CTX_OFF(name.val),\
&shadow_ring_context->name.val, 4);\
shadow_ring_context->name.val |= 0xffff << 16;\
@@ -165,7 +165,7 @@ static int populate_shadow_context(struct intel_vgpu_workload *workload)
COPY_REG(rcs_indirect_ctx);
COPY_REG(rcs_indirect_ctx_offset);
} else if (workload->engine->id == BCS0)
- intel_gvt_hypervisor_read_gpa(vgpu,
+ intel_gvt_read_gpa(vgpu,
workload->ring_context_gpa +
BCS_TILE_REGISTER_VAL_OFFSET,
(void *)shadow_ring_context +
@@ -176,7 +176,7 @@ static int populate_shadow_context(struct intel_vgpu_workload *workload)
/* don't copy Ring Context (the first 0x50 dwords),
* only copy the Engine Context part from guest
*/
- intel_gvt_hypervisor_read_gpa(vgpu,
+ intel_gvt_read_gpa(vgpu,
workload->ring_context_gpa +
RING_CTX_SIZE,
(void *)shadow_ring_context +
@@ -243,7 +243,7 @@ static int populate_shadow_context(struct intel_vgpu_workload *workload)
continue;
read:
- intel_gvt_hypervisor_read_gpa(vgpu, gpa_base, dst, gpa_size);
+ intel_gvt_read_gpa(vgpu, gpa_base, dst, gpa_size);
gpa_base = context_gpa;
gpa_size = I915_GTT_PAGE_SIZE;
dst = context_base + (i << I915_GTT_PAGE_SHIFT);
@@ -909,8 +909,7 @@ static void update_guest_pdps(struct intel_vgpu *vgpu,
gpa = ring_context_gpa + RING_CTX_OFF(pdps[0].val);
for (i = 0; i < 8; i++)
- intel_gvt_hypervisor_write_gpa(vgpu,
- gpa + i * 8, &pdp[7 - i], 4);
+ intel_gvt_write_gpa(vgpu, gpa + i * 8, &pdp[7 - i], 4);
}
static __maybe_unused bool
@@ -1005,13 +1004,13 @@ static void update_guest_context(struct intel_vgpu_workload *workload)
continue;
write:
- intel_gvt_hypervisor_write_gpa(vgpu, gpa_base, src, gpa_size);
+ intel_gvt_write_gpa(vgpu, gpa_base, src, gpa_size);
gpa_base = context_gpa;
gpa_size = I915_GTT_PAGE_SIZE;
src = context_base + (i << I915_GTT_PAGE_SHIFT);
}
- intel_gvt_hypervisor_write_gpa(vgpu, workload->ring_context_gpa +
+ intel_gvt_write_gpa(vgpu, workload->ring_context_gpa +
RING_CTX_OFF(ring_header.val), &workload->rb_tail, 4);
shadow_ring_context = (void *) ctx->lrc_reg_state;
@@ -1026,7 +1025,7 @@ static void update_guest_context(struct intel_vgpu_workload *workload)
}
#define COPY_REG(name) \
- intel_gvt_hypervisor_write_gpa(vgpu, workload->ring_context_gpa + \
+ intel_gvt_write_gpa(vgpu, workload->ring_context_gpa + \
RING_CTX_OFF(name.val), &shadow_ring_context->name.val, 4)
COPY_REG(ctx_ctrl);
@@ -1034,7 +1033,7 @@ static void update_guest_context(struct intel_vgpu_workload *workload)
#undef COPY_REG
- intel_gvt_hypervisor_write_gpa(vgpu,
+ intel_gvt_write_gpa(vgpu,
workload->ring_context_gpa +
sizeof(*shadow_ring_context),
(void *)shadow_ring_context +
@@ -1574,7 +1573,7 @@ static void read_guest_pdps(struct intel_vgpu *vgpu,
gpa = ring_context_gpa + RING_CTX_OFF(pdps[0].val);
for (i = 0; i < 8; i++)
- intel_gvt_hypervisor_read_gpa(vgpu,
+ intel_gvt_read_gpa(vgpu,
gpa + i * 8, &pdp[7 - i], 4);
}
@@ -1645,10 +1644,10 @@ intel_vgpu_create_workload(struct intel_vgpu *vgpu,
return ERR_PTR(-EINVAL);
}
- intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa +
+ intel_gvt_read_gpa(vgpu, ring_context_gpa +
RING_CTX_OFF(ring_header.val), &head, 4);
- intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa +
+ intel_gvt_read_gpa(vgpu, ring_context_gpa +
RING_CTX_OFF(ring_tail.val), &tail, 4);
guest_head = head;
@@ -1675,11 +1674,11 @@ intel_vgpu_create_workload(struct intel_vgpu *vgpu,
gvt_dbg_el("ring %s begin a new workload\n", engine->name);
/* record some ring buffer register values for scan and shadow */
- intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa +
+ intel_gvt_read_gpa(vgpu, ring_context_gpa +
RING_CTX_OFF(rb_start.val), &start, 4);
- intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa +
+ intel_gvt_read_gpa(vgpu, ring_context_gpa +
RING_CTX_OFF(rb_ctrl.val), &ctl, 4);
- intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa +
+ intel_gvt_read_gpa(vgpu, ring_context_gpa +
RING_CTX_OFF(ctx_ctrl.val), &ctx_ctl, 4);
if (!intel_gvt_ggtt_validate_range(vgpu, start,
@@ -1702,9 +1701,9 @@ intel_vgpu_create_workload(struct intel_vgpu *vgpu,
workload->rb_ctl = ctl;
if (engine->id == RCS0) {
- intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa +
+ intel_gvt_read_gpa(vgpu, ring_context_gpa +
RING_CTX_OFF(bb_per_ctx_ptr.val), &per_ctx, 4);
- intel_gvt_hypervisor_read_gpa(vgpu, ring_context_gpa +
+ intel_gvt_read_gpa(vgpu, ring_context_gpa +
RING_CTX_OFF(rcs_indirect_ctx.val), &indirect_ctx, 4);
workload->wa_ctx.indirect_ctx.guest_gma =
--
2.30.2
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