We need shared data for actions (e.g. guc suspend/resume), and we're
using those with GuC submission disabled.
Let's introduce intel_guc_init and move shared data alloc there.
This fixes GPF during module unload with HuC, but without GuC submission:
BUG: unable to handle kernel NULL pointer dereference at 000000005aee7809
IP: intel_guc_suspend+0x34/0x140 [i915]
PGD 0 P4D 0
Oops: 0000 [#1] PREEMPT SMP
Modules linked in: i915(O-) netconsole x86_pkg_temp_thermal
intel_powerclamp coretemp crct10dif_pclmul crc32_pclmul ghash_clmulni_intel
mei_me i2c_i801 mei prime_numbers [last unloaded: i915]
CPU: 2 PID: 2794 Comm: rmmod Tainted: G U W O 4.15.0-rc2+ #297
Hardware name: /NUC6i5SYB, BIOS SYSKLi35.86A.0054.2016.0930.1102 09/30/2016
task: 0000000055945c61 task.stack: 00000000264ccb43
RIP: 0010:intel_guc_suspend+0x34/0x140 [i915]
RSP: 0018:ffffc90000483df8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff880829180000 RCX: 0000000000000000
RDX: 0000000000000006 RSI: ffff880844c2c938 RDI: ffff880844c2c000
RBP: ffff880829180000 R08: 00000000a29c58c1 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffa040ba40
R13: ffffffffa040bab0 R14: ffff88084a195060 R15: 000055df3ef357a0
FS: 00007ff43c043740(0000) GS:ffff88084e200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000000f9 CR3: 000000083f179005 CR4: 00000000003606e0
Call Trace:
i915_gem_suspend+0x9d/0x130 [i915]
? i915_driver_unload+0x68/0x180 [i915]
i915_driver_unload+0x70/0x180 [i915]
i915_pci_remove+0x15/0x20 [i915]
pci_device_remove+0x36/0xb0
device_release_driver_internal+0x15f/0x220
driver_detach+0x3a/0x80
bus_remove_driver+0x58/0xd0
pci_unregister_driver+0x29/0x90
SyS_delete_module+0x150/0x1e0
entry_SYSCALL_64_fastpath+0x23/0x9a
RIP: 0033:0x7ff43b51b5c7
RSP: 002b:00007ffe6825a758 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007ff43b51b5c7
RDX: 000000000000000a RSI: 0000000000000800 RDI: 000055df3ef35808
RBP: 0000000000000000 R08: 00007ffe682596d1 R09: 0000000000000000
R10: 00007ff43b594880 R11: 0000000000000206 R12: 000055df3ef357a0
R13: 00007ffe68259740 R14: 000055df3ef35260 R15: 000055df3ef357a0
Code: 00 00 02 74 03 31 c0 c3 53 48 89 fb 48 83 ec 10 e8 52 0f
f8 ff 48 b8 01 05 00 00 02 00 00 00 48 89 44 24 04 48 8b 83 00 12 00 00 <f6> 80
f9 00 00 00 01 0f 84 a7 00 00 00 f6 80 98 00 00 00 01 0f
RIP: intel_guc_suspend+0x34/0x140 [i915] RSP: ffffc90000483df8
CR2: 00000000000000f9
---[ end trace 23a192a61d937a3e ]---
Fixes: b8e5eb960b28 ("drm/i915/guc: Allocate separate shared data object for GuC communication")
Signed-off-by: Michał Winiarski <michal.winiarski@xxxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_guc.c | 51 +++++++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_guc.h | 2 ++
drivers/gpu/drm/i915/intel_guc_submission.c | 37 +--------------------
drivers/gpu/drm/i915/intel_uc.c | 10 +++---
4 files changed, 60 insertions(+), 40 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_guc.c b/drivers/gpu/drm/i915/intel_guc.c
index 177ee69ca9b1..92ed22f38fc4 100644
--- a/drivers/gpu/drm/i915/intel_guc.c
+++ b/drivers/gpu/drm/i915/intel_guc.c
@@ -69,6 +69,57 @@ void intel_guc_init_early(struct intel_guc *guc)
guc->notify = gen8_guc_raise_irq;
}
+static int guc_shared_data_create(struct intel_guc *guc)
+{
+ struct i915_vma *vma;
+ void *vaddr;
+
+ vma = intel_guc_allocate_vma(guc, PAGE_SIZE);
+ if (IS_ERR(vma))
+ return PTR_ERR(vma);
+
+ vaddr = i915_gem_object_pin_map(vma->obj, I915_MAP_WB);
+ if (IS_ERR(vaddr)) {
+ i915_vma_unpin_and_release(&vma);
+ return PTR_ERR(vaddr);
+ }
+
+ guc->shared_data = vma;
+ guc->shared_data_vaddr = vaddr;
+
+ return 0;
+}
+
+static void guc_shared_data_destroy(struct intel_guc *guc)
+{
+ i915_gem_object_unpin_map(guc->shared_data->obj);
+ i915_vma_unpin_and_release(&guc->shared_data);
+}
+
+int intel_guc_init(struct intel_guc *guc)
+{
+ struct drm_i915_private *dev_priv = guc_to_i915(guc);
+ int ret;
+
+ ret = guc_shared_data_create(guc);
+ if (ret)
+ return ret;
+ GEM_BUG_ON(!guc->shared_data);
+
+ /* We need to notify the guc whenever we change the GGTT */
+ i915_ggtt_enable_guc(dev_priv);
+
+ return 0;
+}
+
+void intel_guc_fini(struct intel_guc *guc)
+{
+ struct drm_i915_private *dev_priv = guc_to_i915(guc);
+
+ i915_ggtt_disable_guc(dev_priv);
+ guc_shared_data_destroy(guc);
+}
+
static u32 get_gt_type(struct drm_i915_private *dev_priv)
{
/* XXX: GT type based on PCI device ID? field seems unused by fw */
diff --git a/drivers/gpu/drm/i915/intel_guc.h b/drivers/gpu/drm/i915/intel_guc.h
index 59856726d2bc..81659e223e11 100644
--- a/drivers/gpu/drm/i915/intel_guc.h
+++ b/drivers/gpu/drm/i915/intel_guc.h
@@ -119,6 +119,8 @@ static inline u32 guc_ggtt_offset(struct i915_vma *vma)
void intel_guc_init_early(struct intel_guc *guc);
void intel_guc_init_send_regs(struct intel_guc *guc);
void intel_guc_init_params(struct intel_guc *guc);
+int intel_guc_init(struct intel_guc *guc);
+void intel_guc_fini(struct intel_guc *guc);
int intel_guc_send_nop(struct intel_guc *guc, const u32 *action, u32 len);
int intel_guc_send_mmio(struct intel_guc *guc, const u32 *action, u32 len);
int intel_guc_sample_forcewake(struct intel_guc *guc);
diff --git a/drivers/gpu/drm/i915/intel_guc_submission.c b/drivers/gpu/drm/i915/intel_guc_submission.c
index 912ff143d531..c020560c395e 100644
--- a/drivers/gpu/drm/i915/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/intel_guc_submission.c
@@ -447,33 +447,6 @@ static void guc_stage_desc_fini(struct intel_guc *guc,
memset(desc, 0, sizeof(*desc));
}
-static int guc_shared_data_create(struct intel_guc *guc)
-{
- struct i915_vma *vma;
- void *vaddr;
-
- vma = intel_guc_allocate_vma(guc, PAGE_SIZE);
- if (IS_ERR(vma))
- return PTR_ERR(vma);
-
- vaddr = i915_gem_object_pin_map(vma->obj, I915_MAP_WB);
- if (IS_ERR(vaddr)) {
- i915_vma_unpin_and_release(&vma);
- return PTR_ERR(vaddr);
- }
-
- guc->shared_data = vma;
- guc->shared_data_vaddr = vaddr;
-
- return 0;
-}
-
-static void guc_shared_data_destroy(struct intel_guc *guc)
-{
- i915_gem_object_unpin_map(guc->shared_data->obj);
- i915_vma_unpin_and_release(&guc->shared_data);
-}
-
/* Construct a Work Item and append it to the GuC's Work Queue */
static void guc_wq_item_append(struct intel_guc_client *client,
u32 target_engine, u32 context_desc,
@@ -1279,14 +1252,9 @@ int intel_guc_submission_init(struct intel_guc *guc)
*/
GEM_BUG_ON(!guc->stage_desc_pool);
- ret = guc_shared_data_create(guc);
- if (ret)
- goto err_stage_desc_pool;
- GEM_BUG_ON(!guc->shared_data);
-
ret = intel_guc_log_create(guc);
if (ret < 0)
- goto err_shared_data;
+ goto err_stage_desc_pool;
ret = guc_preempt_work_create(guc);
if (ret)
@@ -1304,8 +1272,6 @@ int intel_guc_submission_init(struct intel_guc *guc)
guc_preempt_work_destroy(guc);
err_log:
intel_guc_log_destroy(guc);
-err_shared_data:
- guc_shared_data_destroy(guc);
err_stage_desc_pool:
guc_stage_desc_pool_destroy(guc);
return ret;
@@ -1316,7 +1282,6 @@ void intel_guc_submission_fini(struct intel_guc *guc)
guc_ads_destroy(guc);
guc_preempt_work_destroy(guc);
intel_guc_log_destroy(guc);
- guc_shared_data_destroy(guc);
guc_stage_desc_pool_destroy(guc);
}
diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
index 461047c86e0d..3040a0e00142 100644
--- a/drivers/gpu/drm/i915/intel_uc.c
+++ b/drivers/gpu/drm/i915/intel_uc.c
@@ -24,6 +24,7 @@
#include "intel_uc.h"
#include "intel_guc_submission.h"
+#include "intel_guc.h"
#include "i915_drv.h"
/* Reset GuC providing us with fresh state for both GuC and HuC.
@@ -204,8 +205,9 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
guc_disable_communication(guc);
gen9_reset_guc_interrupts(dev_priv);
- /* We need to notify the guc whenever we change the GGTT */
- i915_ggtt_enable_guc(dev_priv);
+ ret = intel_guc_init(guc);
+ if (ret)
+ goto err_out;
if (USES_GUC_SUBMISSION(dev_priv)) {
/*
@@ -298,7 +300,7 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
if (USES_GUC_SUBMISSION(dev_priv))
intel_guc_submission_fini(guc);
err_guc:
- i915_ggtt_disable_guc(dev_priv);
+ intel_guc_fini(guc);
err_out:
/*
* Note that there is no fallback as either user explicitly asked for
@@ -330,5 +332,5 @@ void intel_uc_fini_hw(struct drm_i915_private *dev_priv)
intel_guc_submission_fini(guc);
}
- i915_ggtt_disable_guc(dev_priv);
+ intel_guc_fini(guc);
}
--
2.14.3
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