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Message-Id: <20211119130307.21098-2-zhi.a.wang@intel.com>
Date: Fri, 19 Nov 2021 08:03:07 -0500
From: Zhi Wang <zhi.wang.linux@...il.com>
To: intel-gfx@...ts.freedesktop.org,
intel-gvt-dev@...ts.freedesktop.org,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc: Zhi Wang <zhi.wang.linux@...il.com>,
Christoph Hellwig <hch@....de>,
Jason Gunthorpe <jgg@...dia.com>,
Jani Nikula <jani.nikula@...ux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
Vivi Rodrigo <rodrigo.vivi@...el.com>,
Zhenyu Wang <zhenyuw@...ux.intel.com>,
Zhi Wang <zhi.a.wang@...el.com>,
Terrence Xu <terrence.xu@...el.com>
Subject: [PATCH 2/2] i915/gvt: save the MMIO snapshot in the early init of GVT-g
From: Zhi Wang <zhi.wang.linux@...il.com>
To support the early init of GVT-g, which will be put in i915, after the
GVT-g is moved into a dedicated module, we need to save the MMIO snapshot
in the early init of GVT-g, when the HW hasn't been touched.
Cc: Christoph Hellwig <hch@....de>
Cc: Jason Gunthorpe <jgg@...dia.com>
Cc: Jani Nikula <jani.nikula@...ux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>
Cc: Vivi Rodrigo <rodrigo.vivi@...el.com>
Cc: Zhenyu Wang <zhenyuw@...ux.intel.com>
Cc: Zhi Wang <zhi.a.wang@...el.com>
Tested-by: Terrence Xu <terrence.xu@...el.com>
Signed-off-by: Zhi Wang <zhi.wang.linux@...il.com>
---
drivers/gpu/drm/i915/gvt/firmware.c | 36 +----------
drivers/gpu/drm/i915/gvt/handlers.c | 39 ------------
drivers/gpu/drm/i915/gvt/mmio_info_table.c | 72 +++++++++++++++++++++-
drivers/gpu/drm/i915/gvt/mmio_info_table.h | 3 +
4 files changed, 76 insertions(+), 74 deletions(-)
diff --git a/drivers/gpu/drm/i915/gvt/firmware.c b/drivers/gpu/drm/i915/gvt/firmware.c
index 1a8274a3f4b1..dd5d4dd7a8cf 100644
--- a/drivers/gpu/drm/i915/gvt/firmware.c
+++ b/drivers/gpu/drm/i915/gvt/firmware.c
@@ -66,12 +66,6 @@ static struct bin_attribute firmware_attr = {
.mmap = NULL,
};
-static int mmio_snapshot_handler(struct intel_gvt *gvt, u32 offset, void *data)
-{
- *(u32 *)(data + offset) = intel_uncore_read_notrace(gvt->gt->uncore,
- _MMIO(offset));
- return 0;
-}
static int expose_firmware_sysfs(struct intel_gvt *gvt)
{
@@ -99,17 +93,11 @@ static int expose_firmware_sysfs(struct intel_gvt *gvt)
p = firmware + h->cfg_space_offset;
- for (i = 0; i < h->cfg_space_size; i += 4)
- pci_read_config_dword(pdev, i, p + i);
-
- memcpy(gvt->firmware.cfg_space, p, info->cfg_space_size);
+ memcpy(p, gvt->firmware.cfg_space, info->cfg_space_size);
p = firmware + h->mmio_offset;
- /* Take a snapshot of hw mmio registers. */
- intel_gvt_for_each_tracked_mmio(gvt, mmio_snapshot_handler, p);
-
- memcpy(gvt->firmware.mmio, p, info->mmio_size);
+ memcpy(p, gvt->firmware.mmio, info->mmio_size);
crc32_start = offsetof(struct gvt_firmware_header, crc32) + 4;
h->crc32 = crc32_le(0, firmware + crc32_start, size - crc32_start);
@@ -142,9 +130,6 @@ void intel_gvt_free_firmware(struct intel_gvt *gvt)
{
if (!gvt->firmware.firmware_loaded)
clean_firmware_sysfs(gvt);
-
- kfree(gvt->firmware.cfg_space);
- vfree(gvt->firmware.mmio);
}
static int verify_firmware(struct intel_gvt *gvt,
@@ -217,23 +202,6 @@ int intel_gvt_load_firmware(struct intel_gvt *gvt)
if (!path)
return -ENOMEM;
- mem = kmalloc(info->cfg_space_size, GFP_KERNEL);
- if (!mem) {
- kfree(path);
- return -ENOMEM;
- }
-
- firmware->cfg_space = mem;
-
- mem = vmalloc(info->mmio_size);
- if (!mem) {
- kfree(path);
- kfree(firmware->cfg_space);
- return -ENOMEM;
- }
-
- firmware->mmio = mem;
-
sprintf(path, "%s/vid_0x%04x_did_0x%04x_rid_0x%02x.golden_hw_state",
GVT_FIRMWARE_PATH, pdev->vendor, pdev->device,
pdev->revision);
diff --git a/drivers/gpu/drm/i915/gvt/handlers.c b/drivers/gpu/drm/i915/gvt/handlers.c
index 2c064da3db6d..ba7b330a2c71 100644
--- a/drivers/gpu/drm/i915/gvt/handlers.c
+++ b/drivers/gpu/drm/i915/gvt/handlers.c
@@ -2406,45 +2406,6 @@ int intel_gvt_setup_mmio_handlers(struct intel_gvt *gvt)
return ret;
}
-/**
- * intel_gvt_for_each_tracked_mmio - iterate each tracked mmio
- * @gvt: a GVT device
- * @handler: the handler
- * @data: private data given to handler
- *
- * Returns:
- * Zero on success, negative error code if failed.
- */
-int intel_gvt_for_each_tracked_mmio(struct intel_gvt *gvt,
- int (*handler)(struct intel_gvt *gvt, u32 offset, void *data),
- void *data)
-{
- struct gvt_mmio_block *block = gvt->mmio.mmio_block;
- struct intel_gvt_mmio_info *e;
- int i, j, ret;
-
- hash_for_each(gvt->mmio.mmio_info_table, i, e, node) {
- ret = handler(gvt, e->offset, data);
- if (ret)
- return ret;
- }
-
- for (i = 0; i < gvt->mmio.num_mmio_block; i++, block++) {
- /* pvinfo data doesn't come from hw mmio */
- if (i915_mmio_reg_offset(block->offset) == VGT_PVINFO_PAGE)
- continue;
-
- for (j = 0; j < block->size; j += 4) {
- ret = handler(gvt,
- i915_mmio_reg_offset(block->offset) + j,
- data);
- if (ret)
- return ret;
- }
- }
- return 0;
-}
-
/**
* intel_vgpu_default_mmio_read - default MMIO read handler
* @vgpu: a vGPU
diff --git a/drivers/gpu/drm/i915/gvt/mmio_info_table.c b/drivers/gpu/drm/i915/gvt/mmio_info_table.c
index 723190c25313..76535e3cc9ba 100644
--- a/drivers/gpu/drm/i915/gvt/mmio_info_table.c
+++ b/drivers/gpu/drm/i915/gvt/mmio_info_table.c
@@ -1398,6 +1398,54 @@ void intel_gvt_clean_mmio_info(struct intel_gvt *gvt)
vfree(gvt->mmio.mmio_attribute);
gvt->mmio.mmio_attribute = NULL;
+ kfree(gvt->firmware.cfg_space);
+ vfree(gvt->firmware.mmio);
+}
+
+static int mmio_snapshot_handler(struct intel_gvt *gvt, u32 offset, void *data)
+{
+ *(u32 *)(data + offset) = intel_uncore_read_notrace(gvt->gt->uncore,
+ _MMIO(offset));
+ return 0;
+}
+
+/**
+ * intel_gvt_for_each_tracked_mmio - iterate each tracked mmio
+ * @gvt: a GVT device
+ * @handler: the handler
+ * @data: private data given to handler
+ *
+ * Returns:
+ * Zero on success, negative error code if failed.
+ */
+int intel_gvt_for_each_tracked_mmio(struct intel_gvt *gvt,
+ int (*handler)(struct intel_gvt *gvt, u32 offset, void *data),
+ void *data)
+{
+ struct gvt_mmio_block *block = gvt->mmio.mmio_block;
+ struct intel_gvt_mmio_info *e;
+ int i, j, ret;
+
+ hash_for_each(gvt->mmio.mmio_info_table, i, e, node) {
+ ret = handler(gvt, e->offset, data);
+ if (ret)
+ return ret;
+ }
+
+ for (i = 0; i < gvt->mmio.num_mmio_block; i++, block++) {
+ /* pvinfo data doesn't come from hw mmio */
+ if (i915_mmio_reg_offset(block->offset) == VGT_PVINFO_PAGE)
+ continue;
+
+ for (j = 0; j < block->size; j += 4) {
+ ret = handler(gvt,
+ i915_mmio_reg_offset(block->offset) + j,
+ data);
+ if (ret)
+ return ret;
+ }
+ }
+ return 0;
}
/**
@@ -1414,8 +1462,10 @@ int intel_gvt_setup_mmio_info(struct intel_gvt *gvt)
{
struct intel_gvt_device_info *info = &gvt->device_info;
struct drm_i915_private *i915 = gvt->gt->i915;
+ struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
int size = info->mmio_size / 4 * sizeof(*gvt->mmio.mmio_attribute);
- int ret;
+ void *mem;
+ int i, ret;
gvt->mmio.mmio_attribute = vzalloc(size);
if (!gvt->mmio.mmio_attribute)
@@ -1454,6 +1504,26 @@ int intel_gvt_setup_mmio_info(struct intel_gvt *gvt)
gvt->mmio.mmio_block = mmio_blocks;
gvt->mmio.num_mmio_block = ARRAY_SIZE(mmio_blocks);
+ mem = kzalloc(info->cfg_space_size, GFP_KERNEL);
+ if (!mem)
+ goto err;
+
+ gvt->firmware.cfg_space = mem;
+
+ for (i = 0; i < info->cfg_space_size; i += 4)
+ pci_read_config_dword(pdev, i, mem + i);
+
+ mem = vzalloc(info->mmio_size);
+ if (!mem) {
+ kfree(gvt->firmware.cfg_space);
+ goto err;
+ }
+
+ gvt->firmware.mmio = mem;
+
+ /* Take a snapshot of hw mmio registers. */
+ intel_gvt_for_each_tracked_mmio(gvt, mmio_snapshot_handler, mem);
+
return 0;
err:
intel_gvt_clean_mmio_info(gvt);
diff --git a/drivers/gpu/drm/i915/gvt/mmio_info_table.h b/drivers/gpu/drm/i915/gvt/mmio_info_table.h
index 1c78ab1906c4..8379cb41735f 100644
--- a/drivers/gpu/drm/i915/gvt/mmio_info_table.h
+++ b/drivers/gpu/drm/i915/gvt/mmio_info_table.h
@@ -27,6 +27,9 @@
unsigned long intel_gvt_get_device_type(struct intel_gvt *gvt);
bool intel_gvt_match_device(struct intel_gvt *gvt, unsigned long device);
+int intel_gvt_for_each_tracked_mmio(struct intel_gvt *gvt,
+ int (*handler)(struct intel_gvt *gvt, u32 offset, void *data),
+ void *data);
struct intel_gvt_mmio_info *intel_gvt_find_mmio_info(struct intel_gvt *gvt,
unsigned int offset);
int intel_gvt_setup_mmio_info(struct intel_gvt *gvt);
--
2.25.1
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