[Intel-gfx] [PATCH v6 06/14] drm/i915: GuC firmware loader
yu.dai at intel.com
yu.dai at intel.com
Wed Apr 29 15:13:27 PDT 2015
From: Alex Dai <yu.dai at intel.com>
Add GuC firmware loader. It uses the unified firmware loader to
fetch firmware blob first, then load to hw in driver main thread.
This patch is derived from GuC loading work originally done by
Vinit Azad and Ben Widawsky. It has been reconstructed to accord
with the unified firmware loading mechanism by Dave Gordon as well
as new firmware layout etc.
Issue: VIZ-4884
Signed-off-by: Alex Dai <yu.dai at intel.com>
---
drivers/gpu/drm/i915/Makefile | 3 +-
drivers/gpu/drm/i915/i915_dma.c | 4 +
drivers/gpu/drm/i915/i915_drv.h | 6 +
drivers/gpu/drm/i915/i915_gem.c | 7 +
drivers/gpu/drm/i915/i915_gem_context.c | 4 +
drivers/gpu/drm/i915/i915_reg.h | 4 +-
drivers/gpu/drm/i915/intel_guc.h | 106 +++++++++
drivers/gpu/drm/i915/intel_guc_loader.c | 368 ++++++++++++++++++++++++++++++++
8 files changed, 500 insertions(+), 2 deletions(-)
create mode 100644 drivers/gpu/drm/i915/intel_guc.h
create mode 100644 drivers/gpu/drm/i915/intel_guc_loader.c
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 1b027c7..6188302 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -40,7 +40,8 @@ i915-y += i915_cmd_parser.o \
intel_uncore.o
# ancilliary microcontroller support
-i915-y += intel_uc_loader.o
+i915-y += intel_uc_loader.o \
+ intel_guc_loader.o
# autogenerated null render state
i915-y += intel_renderstate_gen6.o \
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index e44116f..92f19e5 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -465,6 +465,7 @@ static int i915_load_modeset_init(struct drm_device *dev)
cleanup_gem:
mutex_lock(&dev->struct_mutex);
+ intel_guc_ucode_fini(dev);
i915_gem_cleanup_ringbuffer(dev);
i915_gem_context_fini(dev);
mutex_unlock(&dev->struct_mutex);
@@ -861,6 +862,8 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
intel_uncore_init(dev);
+ intel_guc_ucode_init(dev);
+
ret = i915_gem_gtt_init(dev);
if (ret)
goto out_regs;
@@ -1108,6 +1111,7 @@ int i915_driver_unload(struct drm_device *dev)
flush_workqueue(dev_priv->wq);
mutex_lock(&dev->struct_mutex);
+ intel_guc_ucode_fini(dev);
i915_gem_cleanup_ringbuffer(dev);
i915_gem_context_fini(dev);
mutex_unlock(&dev->struct_mutex);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index f5068cb..b0b901d 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -50,6 +50,7 @@
#include <linux/intel-iommu.h>
#include <linux/kref.h>
#include <linux/pm_qos.h>
+#include "intel_guc.h"
/* General customization:
*/
@@ -1581,6 +1582,8 @@ struct drm_i915_private {
struct intel_gmbus gmbus[GMBUS_NUM_PINS];
+ struct intel_guc guc;
+
/** gmbus_mutex protects against concurrent usage of the single hw gmbus
* controller on different i2c buses. */
struct mutex gmbus_mutex;
@@ -2432,6 +2435,9 @@ struct drm_i915_cmd_table {
#define HAS_RC6(dev) (INTEL_INFO(dev)->gen >= 6)
#define HAS_RC6p(dev) (INTEL_INFO(dev)->gen == 6 || IS_IVYBRIDGE(dev))
+#define HAS_GUC_UCODE(dev) (IS_GEN9(dev))
+#define HAS_GUC_SCHED(dev) (IS_GEN9(dev))
+
#define INTEL_PCH_DEVICE_ID_MASK 0xff00
#define INTEL_PCH_IBX_DEVICE_ID_TYPE 0x3b00
#define INTEL_PCH_CPT_DEVICE_ID_TYPE 0x1c00
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index fabe8de..4001a90 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4864,6 +4864,13 @@ i915_gem_init_hw(struct drm_device *dev)
i915_gem_cleanup_ringbuffer(dev);
}
+ /* We can't enable contexts until all firmware is loaded */
+ ret = intel_guc_ucode_load(dev, false);
+ if (ret == -EAGAIN) {
+ ret = 0; /* too early */
+ goto out;
+ }
+
ret = i915_gem_context_enable(dev_priv);
if (ret == 0) {
dev_priv->contexts_ready = true;
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index 0edae87..81159b1 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -453,6 +453,10 @@ static int i915_gem_context_first_open(struct drm_device *dev)
struct drm_i915_private *dev_priv = dev->dev_private;
int ret;
+ /* We can't enable contexts until all firmware is loaded */
+ ret = intel_guc_ucode_load(dev, true);
+ WARN_ON(ret == -EAGAIN);
+
ret = i915_gem_context_enable(dev_priv);
if (ret == 0)
dev_priv->contexts_ready = true;
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 64beedb..d56546d 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -6696,7 +6696,9 @@ enum skl_disp_power_wells {
#define GEN9_PGCTL_SSB_EU311_ACK (1 << 14)
#define GEN7_MISCCPCTL (0x9424)
-#define GEN7_DOP_CLOCK_GATE_ENABLE (1<<0)
+#define GEN7_DOP_CLOCK_GATE_ENABLE (1<<0)
+#define GEN8_DOP_CLOCK_GATE_CFCLK_ENABLE (1<<2)
+#define GEN8_DOP_CLOCK_GATE_GUC_ENABLE (1<<4)
/* IVYBRIDGE DPF */
#define GEN7_L3CDERRST1 0xB008 /* L3CD Error Status 1 */
diff --git a/drivers/gpu/drm/i915/intel_guc.h b/drivers/gpu/drm/i915/intel_guc.h
new file mode 100644
index 0000000..c6886d1
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_guc.h
@@ -0,0 +1,106 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * 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.
+ *
+ */
+#ifndef _INTEL_GUC_H_
+#define _INTEL_GUC_H_
+
+#include "intel_guc_api.h"
+#include "intel_uc_loader.h"
+
+struct intel_guc {
+ /* Generic uC firmware management */
+ struct intel_uc_fw guc_fw;
+
+ /* GuC-specific additions */
+ uint32_t fw_ver_major;
+ uint32_t fw_ver_minor;
+};
+
+#define GUC_STATUS 0xc000
+#define GS_BOOTROM_SHIFT 1
+#define GS_BOOTROM_MASK (0x7F << GS_BOOTROM_SHIFT)
+#define GS_BOOTROM_RSA_FAILED (0x50 << GS_BOOTROM_SHIFT)
+#define GS_UKERNEL_SHIFT 8
+#define GS_UKERNEL_MASK (0xFF << GS_UKERNEL_SHIFT)
+#define GS_UKERNEL_LAPIC_DONE (0x30 << GS_UKERNEL_SHIFT)
+#define GS_UKERNEL_DPC_ERROR (0x60 << GS_UKERNEL_SHIFT)
+#define GS_UKERNEL_READY (0xF0 << GS_UKERNEL_SHIFT)
+#define GS_MIA_SHIFT 16
+#define GS_MIA_MASK (0x7 << GS_MIA_SHIFT)
+
+#define GUC_WOPCM_SIZE 0xc050
+#define GUC_WOPCM_SIZE_VALUE (0x80 << 12) /* 512KB */
+#define GUC_WOPCM_OFFSET 0x80000 /* 512KB */
+#define SOFT_SCRATCH(n) (0xc180 + ((n) * 4))
+
+#define UOS_CSS_HEADER_OFFSET 0
+#define UOS_CSS_HEADER_SIZE 0x80
+#define UOS_VER_MINOR_OFFSET 0x44
+#define UOS_VER_MAJOR_OFFSET 0x46
+#define UOS_RSA_SIG_SIZE 0x100
+#define UOS_CSS_SIGNING_SIZE 0x204
+
+#define UOS_RSA_SCRATCH_0 0xc200
+#define DMA_ADDR_0_LOW 0xc300
+#define DMA_ADDR_0_HIGH 0xc304
+#define DMA_ADDR_1_LOW 0xc308
+#define DMA_ADDR_1_HIGH 0xc30c
+#define DMA_ADDRESS_SPACE_WOPCM (7 << 16)
+#define DMA_ADDRESS_SPACE_GTT (8 << 16)
+#define DMA_COPY_SIZE 0xc310
+#define DMA_CTRL 0xc314
+#define UOS_MOVE (1<<4)
+#define START_DMA (1<<0)
+#define DMA_GUC_WOPCM_OFFSET 0xc340
+
+#define GEN8_GT_PM_CONFIG 0x138140
+#define GEN9_GT_PM_CONFIG 0x13816c
+#define GEN8_GT_DOORBELL_ENABLE (1<<0)
+
+#define GEN8_GTCR 0x4274
+#define GEN8_GTCR_INVALIDATE (1<<0)
+
+#define GUC_ARAT_C6DIS 0xA178
+
+#define GUC_SHIM_CONTROL (0xc064)
+#define GUC_DISABLE_SRAM_INIT_TO_ZEROES (1<<0)
+#define GUC_ENABLE_READ_CACHE_LOGIC (1<<1)
+#define GUC_ENABLE_MIA_CACHING (1<<2)
+#define GUC_GEN10_MSGCH_ENABLE (1<<4)
+#define GUC_ENABLE_READ_CACHE_FOR_SRAM_DATA (1<<9)
+#define GUC_ENABLE_READ_CACHE_FOR_WOPCM_DATA (1<<10)
+#define GUC_ENABLE_MIA_CLOCK_GATING (1<<15)
+#define GUC_GEN10_SHIM_WC_ENABLE (1<<21)
+
+#define GUC_SHIM_CONTROL_VALUE (GUC_DISABLE_SRAM_INIT_TO_ZEROES | \
+ GUC_ENABLE_READ_CACHE_LOGIC | \
+ GUC_ENABLE_MIA_CACHING | \
+ GUC_ENABLE_READ_CACHE_FOR_SRAM_DATA | \
+ GUC_ENABLE_READ_CACHE_FOR_WOPCM_DATA)
+
+/* intel_guc_loader.c */
+extern int intel_guc_ucode_load(struct drm_device *dev, bool wait);
+extern void intel_guc_ucode_fini(struct drm_device *dev);
+extern void intel_guc_ucode_init(struct drm_device *dev);
+
+#endif
diff --git a/drivers/gpu/drm/i915/intel_guc_loader.c b/drivers/gpu/drm/i915/intel_guc_loader.c
new file mode 100644
index 0000000..0f13620
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_guc_loader.c
@@ -0,0 +1,368 @@
+/*
+ * Copyright © 2014 Intel Corporation
+ *
+ * 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:
+ * Vinit Azad <vinit.azad at intel.com>
+ * Ben Widawsky <ben at bwidawsk.net>
+ * Dave Gordon <david.s.gordon at intel.com>
+ * Alex Dai <yu.dai at intel.com>
+ */
+#include <linux/firmware.h>
+#include "i915_drv.h"
+#include "intel_guc.h"
+
+/**
+ * DOC: GuC
+ *
+ * intel_guc:
+ * Top level structure of guc. It handles firmware loading and manages client
+ * pool and doorbells. intel_guc owns a i915_guc_client to replace the legacy
+ * ExecList submission.
+ *
+ * Firmware versioning:
+ * The firmware build process will generate a version header file with major and
+ * minor version defined. The versions are built into CSS header of firmware.
+ * i915 kernel driver set the minimal firmware version required per platform.
+ * The firmware installation package will install (symbolic link) proper version
+ * of firmware.
+ *
+ */
+
+#define I915_SKL_GUC_UCODE "i915/skl_guc_ver1.bin"
+MODULE_FIRMWARE(I915_SKL_GUC_UCODE);
+#define I915_BXT_GUC_UCODE "i915/bxt_guc_ver1.bin"
+MODULE_FIRMWARE(I915_BXT_GUC_UCODE);
+
+/* Read GuC status register (GUC_STATUS)
+ * Return true if get a success code from normal boot or RC6 boot
+ */
+static inline bool i915_guc_get_status(struct drm_i915_private *dev_priv,
+ u32 *status)
+{
+ *status = I915_READ(GUC_STATUS);
+ return (((*status) & GS_UKERNEL_MASK) == GS_UKERNEL_READY ||
+ ((*status) & GS_UKERNEL_MASK) == GS_UKERNEL_LAPIC_DONE);
+}
+
+/* Transfers the firmware image to RAM for execution by the microcontroller.
+
+ * GuC Firmware layout:
+ * +-------------------------------+ ----
+ * | CSS header | 128B
+ * +-------------------------------+ ----
+ * | uCode |
+ * +-------------------------------+ ----
+ * | RSA signature | 256B
+ * +-------------------------------+ ----
+ * | RSA public Key | 256B
+ * +-------------------------------+ ----
+ * | Public key modulus | 4B
+ * +-------------------------------+ ----
+ *
+ * Architecturally, the DMA engine is bidirectional, and in can potentially
+ * even transfer between GTT locations. This functionality is left out of the
+ * API for now as there is no need for it.
+ *
+ * Be note that GuC need the CSS header plus uKernel code to be copied as one
+ * chunk of data. RSA sig data is loaded via MMIO.
+ */
+static int guc_ucode_xfer_dma(struct drm_i915_private *dev_priv)
+{
+ struct intel_uc_fw *guc_fw = &dev_priv->guc.guc_fw;
+ struct drm_i915_gem_object *fw_obj = guc_fw->uc_fw_obj;
+ unsigned long offset;
+ struct sg_table *sg = fw_obj->pages;
+ u32 status, ucode_size, rsa[UOS_RSA_SIG_SIZE / sizeof(u32)];
+ int i, ret = 0;
+
+ /* uCode size, also is where RSA signature starts */
+ offset = ucode_size = guc_fw->uc_fw_size - UOS_CSS_SIGNING_SIZE;
+
+ /* Copy RSA signature from the fw image to HW for verification */
+ sg_pcopy_to_buffer(sg->sgl, sg->nents, rsa, UOS_RSA_SIG_SIZE, offset);
+ for (i = 0; i < UOS_RSA_SIG_SIZE / sizeof(u32); i++)
+ I915_WRITE(UOS_RSA_SCRATCH_0 + i * sizeof(u32), rsa[i]);
+
+ /* Set the source address for the new blob */
+ offset = i915_gem_obj_ggtt_offset(fw_obj);
+ I915_WRITE(DMA_ADDR_0_LOW, lower_32_bits(offset));
+ I915_WRITE(DMA_ADDR_0_HIGH, upper_32_bits(offset) & 0xFFFF);
+
+ /* Set the destination. Current uCode expects an 8k stack starting from
+ * offset 0. */
+ I915_WRITE(DMA_ADDR_1_LOW, 0x2000);
+
+ /* XXX: The image is automatically transfered to SRAM after the RSA
+ * verification. This is why the address space is chosen as such. */
+ I915_WRITE(DMA_ADDR_1_HIGH, DMA_ADDRESS_SPACE_WOPCM);
+
+ I915_WRITE(DMA_COPY_SIZE, ucode_size);
+
+ /* Finally start the DMA */
+ I915_WRITE(DMA_CTRL, _MASKED_BIT_ENABLE(UOS_MOVE | START_DMA));
+
+ /* NB: Docs recommend not using the interrupt for completion.
+ * FIXME: what's a valid timeout? */
+ ret = wait_for_atomic(i915_guc_get_status(dev_priv, &status), 10);
+
+ DRM_DEBUG_DRIVER("DMA status = 0x%x, GuC status 0x%x\n",
+ I915_READ(DMA_CTRL), status);
+
+ return ret;
+}
+
+static u32 get_gttype(struct drm_device *dev)
+{
+ /* XXX: GT type based on PCI device ID? field seems unused by fw */
+ return 0;
+}
+
+static u32 get_core_family(struct drm_device *dev)
+{
+ switch (INTEL_INFO(dev)->gen) {
+ case 8:
+ return GFXCORE_FAMILY_GEN8;
+ case 9:
+ return GFXCORE_FAMILY_GEN9;
+ default:
+ DRM_ERROR("GUC: unknown gen for scheduler init\n");
+ return GFXCORE_FAMILY_FORCE_ULONG;
+ }
+}
+
+static void set_guc_init_params(struct drm_i915_private *dev_priv)
+{
+ u32 params[GUC_CTL_MAX_DWORDS];
+ int i;
+
+ memset(¶ms, 0, sizeof(params));
+
+ params[GUC_CTL_DEVICE_INFO] |=
+ (get_gttype(dev_priv->dev) << GUC_CTL_GTTYPE_SHIFT) |
+ (get_core_family(dev_priv->dev) << GUC_CTL_COREFAMILY_SHIFT);
+
+ /* GuC ARAT increment is 10 ns. GuC default scheduler quantum is one
+ * second. This ARAR is calculated by:
+ * Scheduler-Quantum-in-ns / ARAT-increment-in-ns = 1000000000 / 10
+ */
+ params[GUC_CTL_ARAT_HIGH] = 0;
+ params[GUC_CTL_ARAT_LOW] = 100000000;
+
+ params[GUC_CTL_WA] |= GUC_CTL_WA_UK_BY_DRIVER;
+
+ params[GUC_CTL_FEATURE] |= GUC_CTL_DISABLE_SCHEDULER |
+ GUC_CTL_VCS2_ENABLED;
+
+ /* XXX: Set up log buffer */
+
+ I915_WRITE(SOFT_SCRATCH(0), 0);
+
+ for (i = 0; i < GUC_CTL_MAX_DWORDS; i++)
+ I915_WRITE(SOFT_SCRATCH(1 + i), params[i]);
+}
+
+/*
+ * Loads the GuC firmware blob in to the MinuteIA.
+ */
+static int guc_ucode_xfer(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_uc_fw *guc_fw = &dev_priv->guc.guc_fw;
+ bool pinned = false;
+ int ret;
+
+ WARN_ON(!mutex_is_locked(&dev->struct_mutex));
+ intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
+
+ ret = i915_gem_obj_ggtt_pin(guc_fw->uc_fw_obj, 0, 0);
+ if (ret)
+ goto out;
+ pinned = true;
+
+ /* init WOPCM */
+ I915_WRITE(GUC_WOPCM_SIZE, GUC_WOPCM_SIZE_VALUE);
+ I915_WRITE(DMA_GUC_WOPCM_OFFSET, GUC_WOPCM_OFFSET);
+
+ /* Invalidate GuC TLB to let GuC take the latest updates to GTT. */
+ I915_WRITE(GEN8_GTCR, GEN8_GTCR_INVALIDATE);
+
+ /* Set MMIO/WA for GuC init */
+
+ /* Enable MIA caching. GuC clock gating is disabled. */
+ I915_WRITE(GUC_SHIM_CONTROL, GUC_SHIM_CONTROL_VALUE);
+
+ /* WaC6DisallowByGfxPause*/
+ I915_WRITE(GEN6_GFXPAUSE, 0x30FFF);
+
+ if (IS_GEN9(dev)) {
+ /* DOP Clock Gating Enable for GuC clocks */
+ I915_WRITE(GEN7_MISCCPCTL, (GEN8_DOP_CLOCK_GATE_GUC_ENABLE |
+ I915_READ(GEN7_MISCCPCTL)));
+
+ /* allows for 5us before GT can go to RC6 */
+ I915_WRITE(GUC_ARAT_C6DIS, 0x1FF);
+ }
+
+ set_guc_init_params(dev_priv);
+
+ ret = guc_ucode_xfer_dma(dev_priv);
+
+ /* We can free the object pages now, and we would, except we might as
+ * well keep it around for suspend/resume. Instead, we just wait for the
+ * DMA to complete, and unpin the object
+ */
+
+out:
+ DRM_DEBUG_DRIVER("return %d, pinned %d\n", ret, pinned);
+
+ if (pinned)
+ i915_gem_object_ggtt_unpin(guc_fw->uc_fw_obj);
+
+ intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+
+ return ret;
+}
+
+/*
+ * Check the firmware that was found; if it's the wrong size or the wrong
+ * version, return FALSE. If it's OK, save the data in a GEM object and
+ * return TRUE.
+ *
+ * The GuC firmware image has the version number embedded at a well-known
+ * offset within the firmware blob; note that major / minor version are
+ * TWO bytes each (i.e. u16), although all pointers and offsets are defined
+ * in terms of bytes (u8).
+ */
+static bool
+guc_ucode_check(struct intel_uc_fw *guc_fw)
+{
+ struct intel_guc *guc = container_of(guc_fw, struct intel_guc, guc_fw);
+ const u8 *css_header = guc_fw->uc_fw_blob->data + UOS_CSS_HEADER_OFFSET;
+ uint32_t major, minor;
+
+ major = *(u16 *)(css_header + UOS_VER_MAJOR_OFFSET);
+ minor = *(u16 *)(css_header + UOS_VER_MINOR_OFFSET);
+
+ if (major != guc->fw_ver_major || minor < guc->fw_ver_minor) {
+ DRM_ERROR("GuC firmware version %d.%d, required %d.%d\n",
+ major, minor, guc->fw_ver_major, guc->fw_ver_minor);
+ return false;
+ }
+
+ DRM_DEBUG_DRIVER("firmware version %d.%d OK (minimum %d.%d)\n",
+ major, minor, guc->fw_ver_major, guc->fw_ver_minor);
+
+ /* Override default GEM object allocation-and-save here, if needed */
+ return true;
+}
+
+/**
+ * intel_guc_ucode_load() - load GuC uCode into the device
+ *
+ * Called from gem_init_hw() during driver loading and also after a GPU reset.
+ * Checks that the firmware fetching process has succeeded, and if so transfer
+ * the loaded image to the hardware.
+ *
+ * However, there are a few checks to do first. The very first call should have
+ * (wait == FALSE), but the fetch_state will still be PENDING as the firmware may
+ * not be available that early. Therefore, on this first call, we just return.
+ *
+ * The second call should come from the first open of the device (wait == TRUE).
+ * This is a good time to load the firmware into the device, as by this point it
+ * must be available.
+ *
+ * Any subsequent calls are expected to have wait == FALSE, and indicate that the
+ * hardware has been reset and so the firmware should be reloaded.
+ */
+int intel_guc_ucode_load(struct drm_device *dev, bool wait)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_uc_fw *guc_fw = &dev_priv->guc.guc_fw;
+ int err;
+
+ DRM_DEBUG_DRIVER("GuC: wait %d, fetch status %d, load status %d\n",
+ wait, guc_fw->uc_fw_fetch_status, guc_fw->uc_fw_load_status);
+
+ if (guc_fw->uc_fw_fetch_status == INTEL_UC_FIRMWARE_PENDING && !wait)
+ return -EAGAIN;
+
+ if (guc_fw->uc_fw_fetch_status == INTEL_UC_FIRMWARE_NONE)
+ return 0;
+
+ guc_fw->uc_fw_load_status = INTEL_UC_FIRMWARE_PENDING;
+ err = intel_uc_fw_check(guc_fw, guc_ucode_check);
+ if (err)
+ goto fail;
+
+ err = guc_ucode_xfer(dev);
+ if (err)
+ goto fail;
+
+ guc_fw->uc_fw_load_status = INTEL_UC_FIRMWARE_SUCCESS;
+ return 0;
+
+fail:
+ guc_fw->uc_fw_load_status = INTEL_UC_FIRMWARE_FAIL;
+ return err;
+}
+
+/**
+ * intel_guc_ucode_init() - initiate a firmware loading request
+ *
+ * Called early during driver load, before GEM is initialised.
+ * Driver is single threaded, so no mutex is required.
+ */
+void intel_guc_ucode_init(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_guc *guc = &dev_priv->guc;
+ struct intel_uc_fw *guc_fw = &guc->guc_fw;
+ const char *path;
+
+ if (!HAS_GUC_UCODE(dev)) {
+ path = NULL;
+ } else if (IS_SKYLAKE(dev)) {
+ path = I915_SKL_GUC_UCODE;
+ guc->fw_ver_major = 1;
+ guc->fw_ver_minor = 0;
+ }
+ else if (IS_BROXTON(dev)) {
+ path = I915_BXT_GUC_UCODE;
+ guc->fw_ver_major = 1;
+ guc->fw_ver_minor = 0;
+ } else {
+ path = ""; /* unknown device */
+ }
+
+ intel_uc_fw_init(dev, guc_fw, "GuC", path);
+}
+
+/**
+ * intel_guc_ucode_fini() - clean up firmware blob allocated
+ */
+void intel_guc_ucode_fini(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_uc_fw *guc_fw = &dev_priv->guc.guc_fw;
+
+ intel_uc_fw_fini(guc_fw);
+}
--
1.9.1
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