linux_dsm_epyc7002/drivers/gpu/drm/i915/gvt/firmware.c
Igor Druzhinin c216f12bed drm/i915/gvt: fix high-order allocation failure on late load
If the module happens to be loaded later at runtime there is a chance
memory is already fragmented enough to fail allocation of firmware
blob storage and consequently GVT init. Since it doesn't seem to be
necessary to have the blob contiguous, use vmalloc() instead to avoid
the issue.

Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1579723824-25711-1-git-send-email-igor.druzhinin@citrix.com
2020-02-10 10:04:21 +08:00

278 lines
7.1 KiB
C

/*
* Copyright(c) 2011-2016 Intel Corporation. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Authors:
* Zhi Wang <zhi.a.wang@intel.com>
*
* Contributors:
* Changbin Du <changbin.du@intel.com>
*
*/
#include <linux/firmware.h>
#include <linux/crc32.h>
#include "i915_drv.h"
#include "gvt.h"
#include "i915_pvinfo.h"
#define FIRMWARE_VERSION (0x0)
struct gvt_firmware_header {
u64 magic;
u32 crc32; /* protect the data after this field */
u32 version;
u64 cfg_space_size;
u64 cfg_space_offset; /* offset in the file */
u64 mmio_size;
u64 mmio_offset; /* offset in the file */
unsigned char data[1];
};
#define dev_to_drm_minor(d) dev_get_drvdata((d))
static ssize_t
gvt_firmware_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t offset, size_t count)
{
memcpy(buf, attr->private + offset, count);
return count;
}
static struct bin_attribute firmware_attr = {
.attr = {.name = "gvt_firmware", .mode = (S_IRUSR)},
.read = gvt_firmware_read,
.write = NULL,
.mmap = NULL,
};
static int mmio_snapshot_handler(struct intel_gvt *gvt, u32 offset, void *data)
{
struct drm_i915_private *i915 = gvt->dev_priv;
*(u32 *)(data + offset) = intel_uncore_read_notrace(&i915->uncore,
_MMIO(offset));
return 0;
}
static int expose_firmware_sysfs(struct intel_gvt *gvt)
{
struct intel_gvt_device_info *info = &gvt->device_info;
struct pci_dev *pdev = gvt->dev_priv->drm.pdev;
struct gvt_firmware_header *h;
void *firmware;
void *p;
unsigned long size, crc32_start;
int i, ret;
size = sizeof(*h) + info->mmio_size + info->cfg_space_size;
firmware = vzalloc(size);
if (!firmware)
return -ENOMEM;
h = firmware;
h->magic = VGT_MAGIC;
h->version = FIRMWARE_VERSION;
h->cfg_space_size = info->cfg_space_size;
h->cfg_space_offset = offsetof(struct gvt_firmware_header, data);
h->mmio_size = info->mmio_size;
h->mmio_offset = h->cfg_space_offset + h->cfg_space_size;
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);
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);
crc32_start = offsetof(struct gvt_firmware_header, crc32) + 4;
h->crc32 = crc32_le(0, firmware + crc32_start, size - crc32_start);
firmware_attr.size = size;
firmware_attr.private = firmware;
ret = device_create_bin_file(&pdev->dev, &firmware_attr);
if (ret) {
vfree(firmware);
return ret;
}
return 0;
}
static void clean_firmware_sysfs(struct intel_gvt *gvt)
{
struct pci_dev *pdev = gvt->dev_priv->drm.pdev;
device_remove_bin_file(&pdev->dev, &firmware_attr);
vfree(firmware_attr.private);
}
/**
* intel_gvt_free_firmware - free GVT firmware
* @gvt: intel gvt device
*
*/
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,
const struct firmware *fw)
{
struct intel_gvt_device_info *info = &gvt->device_info;
struct drm_i915_private *dev_priv = gvt->dev_priv;
struct pci_dev *pdev = dev_priv->drm.pdev;
struct gvt_firmware_header *h;
unsigned long id, crc32_start;
const void *mem;
const char *item;
u64 file, request;
h = (struct gvt_firmware_header *)fw->data;
crc32_start = offsetofend(struct gvt_firmware_header, crc32);
mem = fw->data + crc32_start;
#define VERIFY(s, a, b) do { \
item = (s); file = (u64)(a); request = (u64)(b); \
if ((a) != (b)) \
goto invalid_firmware; \
} while (0)
VERIFY("magic number", h->magic, VGT_MAGIC);
VERIFY("version", h->version, FIRMWARE_VERSION);
VERIFY("crc32", h->crc32, crc32_le(0, mem, fw->size - crc32_start));
VERIFY("cfg space size", h->cfg_space_size, info->cfg_space_size);
VERIFY("mmio size", h->mmio_size, info->mmio_size);
mem = (fw->data + h->cfg_space_offset);
id = *(u16 *)(mem + PCI_VENDOR_ID);
VERIFY("vender id", id, pdev->vendor);
id = *(u16 *)(mem + PCI_DEVICE_ID);
VERIFY("device id", id, pdev->device);
id = *(u8 *)(mem + PCI_REVISION_ID);
VERIFY("revision id", id, pdev->revision);
#undef VERIFY
return 0;
invalid_firmware:
gvt_dbg_core("Invalid firmware: %s [file] 0x%llx [request] 0x%llx\n",
item, file, request);
return -EINVAL;
}
#define GVT_FIRMWARE_PATH "i915/gvt"
/**
* intel_gvt_load_firmware - load GVT firmware
* @gvt: intel gvt device
*
*/
int intel_gvt_load_firmware(struct intel_gvt *gvt)
{
struct intel_gvt_device_info *info = &gvt->device_info;
struct drm_i915_private *dev_priv = gvt->dev_priv;
struct pci_dev *pdev = dev_priv->drm.pdev;
struct intel_gvt_firmware *firmware = &gvt->firmware;
struct gvt_firmware_header *h;
const struct firmware *fw;
char *path;
void *mem;
int ret;
path = kmalloc(PATH_MAX, GFP_KERNEL);
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);
gvt_dbg_core("request hw state firmware %s...\n", path);
ret = request_firmware(&fw, path, &dev_priv->drm.pdev->dev);
kfree(path);
if (ret)
goto expose_firmware;
gvt_dbg_core("success.\n");
ret = verify_firmware(gvt, fw);
if (ret)
goto out_free_fw;
gvt_dbg_core("verified.\n");
h = (struct gvt_firmware_header *)fw->data;
memcpy(firmware->cfg_space, fw->data + h->cfg_space_offset,
h->cfg_space_size);
memcpy(firmware->mmio, fw->data + h->mmio_offset,
h->mmio_size);
release_firmware(fw);
firmware->firmware_loaded = true;
return 0;
out_free_fw:
release_firmware(fw);
expose_firmware:
expose_firmware_sysfs(gvt);
return 0;
}