--- /dev/null
+/*
+ * 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"
+
+#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 RD(offset) (readl(mmio + offset.reg))
+#define WR(v, offset) (writel(v, mmio + offset.reg))
+
+static void bdw_forcewake_get(void *mmio)
+{
+ WR(_MASKED_BIT_DISABLE(0xffff), FORCEWAKE_MT);
+
+ RD(ECOBUS);
+
+ if (wait_for((RD(FORCEWAKE_ACK_HSW) & FORCEWAKE_KERNEL) == 0, 50))
+ gvt_err("fail to wait forcewake idle\n");
+
+ WR(_MASKED_BIT_ENABLE(FORCEWAKE_KERNEL), FORCEWAKE_MT);
+
+ if (wait_for((RD(FORCEWAKE_ACK_HSW) & FORCEWAKE_KERNEL), 50))
+ gvt_err("fail to wait forcewake ack\n");
+
+ if (wait_for((RD(GEN6_GT_THREAD_STATUS_REG) &
+ GEN6_GT_THREAD_STATUS_CORE_MASK) == 0, 50))
+ gvt_err("fail to wait c0 wake up\n");
+}
+
+#undef RD
+#undef WR
+
+#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 expose_firmware_sysfs(struct intel_gvt *gvt, void *mmio)
+{
+ struct intel_gvt_device_info *info = &gvt->device_info;
+ struct pci_dev *pdev = gvt->dev_priv->drm.pdev;
+ struct intel_gvt_mmio_info *e;
+ struct gvt_firmware_header *h;
+ void *firmware;
+ void *p;
+ unsigned long size;
+ int i;
+ int ret;
+
+ size = sizeof(*h) + info->mmio_size + info->cfg_space_size - 1;
+ firmware = vmalloc(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;
+
+ hash_for_each(gvt->mmio.mmio_info_table, i, e, node) {
+ int j;
+
+ for (j = 0; j < e->length; j += 4)
+ *(u32 *)(p + e->offset + j) =
+ readl(mmio + e->offset + j);
+ }
+
+ memcpy(gvt->firmware.mmio, p, info->mmio_size);
+
+ 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);
+ kfree(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 = offsetof(struct gvt_firmware_header, crc32) + 4;
+ 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 *mmio, *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 = kmalloc(info->mmio_size, GFP_KERNEL);
+ if (!mem) {
+ kfree(path);
+ kfree(firmware->cfg_space);
+ return -ENOMEM;
+ }
+
+ firmware->mmio = mem;
+
+ mmio = pci_iomap(pdev, info->mmio_bar, info->mmio_size);
+ if (!mmio) {
+ kfree(path);
+ kfree(firmware->cfg_space);
+ kfree(firmware->mmio);
+ return -EINVAL;
+ }
+
+ if (IS_BROADWELL(gvt->dev_priv) || IS_SKYLAKE(gvt->dev_priv))
+ bdw_forcewake_get(mmio);
+
+ sprintf(path, "%s/vid_0x%04x_did_0x%04x_rid_0x%04x.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;
+ pci_iounmap(pdev, mmio);
+ return 0;
+
+out_free_fw:
+ release_firmware(fw);
+expose_firmware:
+ expose_firmware_sysfs(gvt, mmio);
+ pci_iounmap(pdev, mmio);
+ return 0;
+}
projects / linux.git / commitdiff