[Patch v5 13/24] drm/amdkfd: CRIU checkpoint and restore queue control stack

3 Feb 2022

From: David Yat Sin david.yatsin@amd.com
Checkpoint contents of queue control stacks on CRIU dump and restore them
during CRIU restore.
Signed-off-by: David Yat Sin david.yatsin@amd.com
Signed-off-by: Rajneesh Bhardwaj rajneesh.bhardwaj@amd.com
---
 drivers/gpu/drm/amd/amdkfd/kfd_chardev.c      |  2 +-
 drivers/gpu/drm/amd/amdkfd/kfd_dbgdev.c       |  2 +-
 .../drm/amd/amdkfd/kfd_device_queue_manager.c | 22 ++++---
 .../drm/amd/amdkfd/kfd_device_queue_manager.h |  9 ++-
 drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager.h  | 11 +++-
 .../gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c  | 13 ++--
 .../gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c  | 14 +++--
 .../gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c   | 29 +++++++--
 .../gpu/drm/amd/amdkfd/kfd_mqd_manager_vi.c   | 22 +++++--
 drivers/gpu/drm/amd/amdkfd/kfd_priv.h         |  5 +-
 .../amd/amdkfd/kfd_process_queue_manager.c    | 62 +++++++++++++------
 11 files changed, 138 insertions(+), 53 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index 999672602252..608214ea634d 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -311,7 +311,7 @@ static int kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p,
    		p->pasid,
    		dev->id);
-	err = pqm_create_queue(&p->pqm, dev, filep, &q_properties, &queue_id, NULL, NULL,
+	err = pqm_create_queue(&p->pqm, dev, filep, &q_properties, &queue_id, NULL, NULL, NULL,
    		&doorbell_offset_in_process);
    if (err != 0)
    	goto err_create_queue;
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_dbgdev.c b/drivers/gpu/drm/amd/amdkfd/kfd_dbgdev.c
index 3a5303ebcabf..8eca9ed3ab36 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_dbgdev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_dbgdev.c
@@ -185,7 +185,7 @@ static int dbgdev_register_diq(struct kfd_dbgdev *dbgdev)
    properties.type = KFD_QUEUE_TYPE_DIQ;
status = pqm_create_queue(dbgdev->pqm, dbgdev->dev, NULL,
-				&properties, &qid, NULL, NULL, NULL);
+				&properties, &qid, NULL, NULL, NULL, NULL);
if (status) {
    	pr_err("Failed to create DIQ\n");
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
index 42933610d4e1..63b3c7af681b 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
@@ -323,7 +323,7 @@ static int create_queue_nocpsch(struct device_queue_manager *dqm,
    			struct queue *q,
    			struct qcm_process_device *qpd,
    			const struct kfd_criu_queue_priv_data *qd,
-				const void *restore_mqd)
+				const void *restore_mqd, const void *restore_ctl_stack)
 {
    struct mqd_manager *mqd_mgr;
    int retval;
@@ -385,7 +385,8 @@ static int create_queue_nocpsch(struct device_queue_manager *dqm,
if (qd)
    	mqd_mgr->restore_mqd(mqd_mgr, &q->mqd, q->mqd_mem_obj, &q->gart_mqd_addr,
-				     &q->properties, restore_mqd);
+				     &q->properties, restore_mqd, restore_ctl_stack,
+				     qd->ctl_stack_size);
    else
    	mqd_mgr->init_mqd(mqd_mgr, &q->mqd, q->mqd_mem_obj,
    				&q->gart_mqd_addr, &q->properties);
@@ -1342,7 +1343,7 @@ static void destroy_kernel_queue_cpsch(struct device_queue_manager *dqm,
 static int create_queue_cpsch(struct device_queue_manager *dqm, struct queue *q,
    		struct qcm_process_device *qpd,
    		const struct kfd_criu_queue_priv_data *qd,
-			const void *restore_mqd)
+			const void *restore_mqd, const void *restore_ctl_stack)
 {
    int retval;
    struct mqd_manager *mqd_mgr;
@@ -1391,7 +1392,8 @@ static int create_queue_cpsch(struct device_queue_manager *dqm, struct queue *q,
if (qd)
    	mqd_mgr->restore_mqd(mqd_mgr, &q->mqd, q->mqd_mem_obj, &q->gart_mqd_addr,
-				     &q->properties, restore_mqd);
+				     &q->properties, restore_mqd, restore_ctl_stack,
+				     qd->ctl_stack_size);
    else
    	mqd_mgr->init_mqd(mqd_mgr, &q->mqd, q->mqd_mem_obj,
    				&q->gart_mqd_addr, &q->properties);
@@ -1799,7 +1801,8 @@ static int get_wave_state(struct device_queue_manager *dqm,
static void get_queue_checkpoint_info(struct device_queue_manager *dqm,
    		const struct queue *q,
-			u32 *mqd_size)
+			u32 *mqd_size,
+			u32 *ctl_stack_size)
 {
    struct mqd_manager *mqd_mgr;
    enum KFD_MQD_TYPE mqd_type =
@@ -1808,13 +1811,18 @@ static void get_queue_checkpoint_info(struct device_queue_manager *dqm,
    dqm_lock(dqm);
    mqd_mgr = dqm->mqd_mgrs[mqd_type];
    *mqd_size = mqd_mgr->mqd_size;
+	*ctl_stack_size = 0;
+
+	if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE && mqd_mgr->get_checkpoint_info)
+		mqd_mgr->get_checkpoint_info(mqd_mgr, q->mqd, ctl_stack_size);
dqm_unlock(dqm);
 }
static int checkpoint_mqd(struct device_queue_manager *dqm,
    		  const struct queue *q,
-			  void *mqd)
+			  void *mqd,
+			  void *ctl_stack)
 {
    struct mqd_manager *mqd_mgr;
    int r = 0;
@@ -1834,7 +1842,7 @@ static int checkpoint_mqd(struct device_queue_manager *dqm,
    	goto dqm_unlock;
    }
-	mqd_mgr->checkpoint_mqd(mqd_mgr, q->mqd, mqd);
+	mqd_mgr->checkpoint_mqd(mqd_mgr, q->mqd, mqd, ctl_stack);
dqm_unlock:
    dqm_unlock(dqm);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h
index fb6aa2a1ca0f..a7d2e3323977 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h
@@ -93,7 +93,8 @@ struct device_queue_manager_ops {
    			struct queue *q,
    			struct qcm_process_device *qpd,
    			const struct kfd_criu_queue_priv_data *qd,
-				const void *restore_mqd);
+				const void *restore_mqd,
+				const void *restore_ctl_stack);
int	(*destroy_queue)(struct device_queue_manager *dqm,
    			struct qcm_process_device *qpd,
@@ -145,11 +146,13 @@ struct device_queue_manager_ops {
    int (*reset_queues)(struct device_queue_manager *dqm,
    				uint16_t pasid);
    void	(*get_queue_checkpoint_info)(struct device_queue_manager *dqm,
-				  const struct queue *q, u32 *mqd_size);
+				  const struct queue *q, u32 *mqd_size,
+				  u32 *ctl_stack_size);
int	(*checkpoint_mqd)(struct device_queue_manager *dqm,
    			  const struct queue *q,
-				  void *mqd);
+				  void *mqd,
+				  void *ctl_stack);
 };
struct device_queue_manager_asic_ops {
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager.h b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager.h
index cebb2877a505..23486a23df84 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager.h
@@ -100,12 +100,19 @@ struct mqd_manager {
    			  u32 *ctl_stack_used_size,
    			  u32 *save_area_used_size);
-	void	(*checkpoint_mqd)(struct mqd_manager *mm, void *mqd, void *mqd_dst);
+	void	(*get_checkpoint_info)(struct mqd_manager *mm, void *mqd, uint32_t *ctl_stack_size);
+
+	void	(*checkpoint_mqd)(struct mqd_manager *mm,
+				  void *mqd,
+				  void *mqd_dst,
+				  void *ctl_stack_dst);
void	(*restore_mqd)(struct mqd_manager *mm, void **mqd,
    			struct kfd_mem_obj *mqd_mem_obj, uint64_t *gart_addr,
    			struct queue_properties *p,
-				const void *mqd_src);
+				const void *mqd_src,
+				const void *ctl_stack_src,
+				const u32 ctl_stack_size);
#if defined(CONFIG_DEBUG_FS)
    int	(*debugfs_show_mqd)(struct seq_file *m, void *data);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c
index 83117209bc15..96e3303fa27c 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c
@@ -280,7 +280,7 @@ static int destroy_mqd(struct mqd_manager *mm, void *mqd,
    				pipe_id, queue_id);
 }
-static void checkpoint_mqd(struct mqd_manager *mm, void *mqd, void *mqd_dst)
+static void checkpoint_mqd(struct mqd_manager *mm, void *mqd, void *mqd_dst, void *ctl_stack_dst)
 {
    struct cik_mqd *m;
@@ -292,7 +292,8 @@ static void checkpoint_mqd(struct mqd_manager *mm, void *mqd, void *mqd_dst)
 static void restore_mqd(struct mqd_manager *mm, void **mqd,
    		struct kfd_mem_obj *mqd_mem_obj, uint64_t *gart_addr,
    		struct queue_properties *qp,
-			const void *mqd_src)
+			const void *mqd_src,
+			const void *ctl_stack_src, const u32 ctl_stack_size)
 {
    uint64_t addr;
    struct cik_mqd *m;
@@ -314,7 +315,10 @@ static void restore_mqd(struct mqd_manager *mm, void **mqd,
    qp->is_active = 0;
 }
-static void checkpoint_mqd_sdma(struct mqd_manager *mm, void *mqd, void *mqd_dst)
+static void checkpoint_mqd_sdma(struct mqd_manager *mm,
+				void *mqd,
+				void *mqd_dst,
+				void *ctl_stack_dst)
 {
    struct cik_sdma_rlc_registers *m;
@@ -326,7 +330,8 @@ static void checkpoint_mqd_sdma(struct mqd_manager *mm, void *mqd, void *mqd_dst
 static void restore_mqd_sdma(struct mqd_manager *mm, void **mqd,
    			struct kfd_mem_obj *mqd_mem_obj, uint64_t *gart_addr,
    			struct queue_properties *qp,
-				const void *mqd_src)
+				const void *mqd_src,
+				const void *ctl_stack_src, const u32 ctl_stack_size)
 {
    uint64_t addr;
    struct cik_sdma_rlc_registers *m;
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c
index 4ddf5b45c42a..0cc8679c24fa 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v10.c
@@ -285,7 +285,7 @@ static int get_wave_state(struct mqd_manager *mm, void *mqd,
    return 0;
 }
-static void checkpoint_mqd(struct mqd_manager *mm, void *mqd, void *mqd_dst)
+static void checkpoint_mqd(struct mqd_manager *mm, void *mqd, void *mqd_dst, void *ctl_stack_dst)
 {
    struct v10_compute_mqd *m;
@@ -297,7 +297,8 @@ static void checkpoint_mqd(struct mqd_manager *mm, void *mqd, void *mqd_dst)
 static void restore_mqd(struct mqd_manager *mm, void **mqd,
    		struct kfd_mem_obj *mqd_mem_obj, uint64_t *gart_addr,
    		struct queue_properties *qp,
-			const void *mqd_src)
+			const void *mqd_src,
+			const void *ctl_stack_src, const u32 ctl_stack_size)
 {
    uint64_t addr;
    struct v10_compute_mqd *m;
@@ -408,7 +409,10 @@ static bool is_occupied_sdma(struct mqd_manager *mm, void *mqd,
    return mm->dev->kfd2kgd->hqd_sdma_is_occupied(mm->dev->adev, mqd);
 }
-static void checkpoint_mqd_sdma(struct mqd_manager *mm, void *mqd, void *mqd_dst)
+static void checkpoint_mqd_sdma(struct mqd_manager *mm,
+				void *mqd,
+				void *mqd_dst,
+				void *ctl_stack_dst)
 {
    struct v10_sdma_mqd *m;
@@ -420,7 +424,9 @@ static void checkpoint_mqd_sdma(struct mqd_manager *mm, void *mqd, void *mqd_dst
 static void restore_mqd_sdma(struct mqd_manager *mm, void **mqd,
    		     struct kfd_mem_obj *mqd_mem_obj, uint64_t *gart_addr,
    		     struct queue_properties *qp,
-			     const void *mqd_src)
+			     const void *mqd_src,
+			     const void *ctl_stack_src,
+			     const u32 ctl_stack_size)
 {
    uint64_t addr;
    struct v10_sdma_mqd *m;
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c
index 18ad7669eedf..87da4329dbf2 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_v9.c
@@ -340,22 +340,34 @@ static int get_wave_state(struct mqd_manager *mm, void *mqd,
    return 0;
 }
-static void checkpoint_mqd(struct mqd_manager *mm, void *mqd, void *mqd_dst)
+static void get_checkpoint_info(struct mqd_manager *mm, void *mqd, u32 *ctl_stack_size)
+{
+	struct v9_mqd *m = get_mqd(mqd);
+
+	*ctl_stack_size = m->cp_hqd_cntl_stack_size;
+}
+
+static void checkpoint_mqd(struct mqd_manager *mm, void *mqd, void *mqd_dst, void *ctl_stack_dst)
 {
    struct v9_mqd *m;
+	/* Control stack is located one page after MQD. */
+	void *ctl_stack = (void *)((uintptr_t)mqd + PAGE_SIZE);
m = get_mqd(mqd);
memcpy(mqd_dst, m, sizeof(struct v9_mqd));
+	memcpy(ctl_stack_dst, ctl_stack, m->cp_hqd_cntl_stack_size);
 }
static void restore_mqd(struct mqd_manager *mm, void **mqd,
    		struct kfd_mem_obj *mqd_mem_obj, uint64_t *gart_addr,
    		struct queue_properties *qp,
-			const void *mqd_src)
+			const void *mqd_src,
+			const void *ctl_stack_src, u32 ctl_stack_size)
 {
    uint64_t addr;
    struct v9_mqd *m;
+	void *ctl_stack;
m = (struct v9_mqd *) mqd_mem_obj->cpu_ptr;
    addr = mqd_mem_obj->gpu_addr;
@@ -366,6 +378,10 @@ static void restore_mqd(struct mqd_manager *mm, void **mqd,
    if (gart_addr)
    	*gart_addr = addr;
+	/* Control stack is located one page after MQD. */
+	ctl_stack = (void *)((uintptr_t)*mqd + PAGE_SIZE);
+	memcpy(ctl_stack, ctl_stack_src, ctl_stack_size);
+
    m->cp_hqd_pq_doorbell_control =
    	qp->doorbell_off <<
    		CP_HQD_PQ_DOORBELL_CONTROL__DOORBELL_OFFSET__SHIFT;
@@ -463,7 +479,10 @@ static bool is_occupied_sdma(struct mqd_manager *mm, void *mqd,
    return mm->dev->kfd2kgd->hqd_sdma_is_occupied(mm->dev->adev, mqd);
 }
-static void checkpoint_mqd_sdma(struct mqd_manager *mm, void *mqd, void *mqd_dst)
+static void checkpoint_mqd_sdma(struct mqd_manager *mm,
+				void *mqd,
+				void *mqd_dst,
+				void *ctl_stack_dst)
 {
    struct v9_sdma_mqd *m;
@@ -475,7 +494,8 @@ static void checkpoint_mqd_sdma(struct mqd_manager *mm, void *mqd, void *mqd_dst
 static void restore_mqd_sdma(struct mqd_manager *mm, void **mqd,
    		     struct kfd_mem_obj *mqd_mem_obj, uint64_t *gart_addr,
    		     struct queue_properties *qp,
-			     const void *mqd_src)
+			     const void *mqd_src,
+			     const void *ctl_stack_src, const u32 ctl_stack_size)
 {
    uint64_t addr;
    struct v9_sdma_mqd *m;
@@ -537,6 +557,7 @@ struct mqd_manager *mqd_manager_init_v9(enum KFD_MQD_TYPE type,
    	mqd->destroy_mqd = destroy_mqd;
    	mqd->is_occupied = is_occupied;
    	mqd->get_wave_state = get_wave_state;
+		mqd->get_checkpoint_info = get_checkpoint_info;
    	mqd->checkpoint_mqd = checkpoint_mqd;
    	mqd->restore_mqd = restore_mqd;
    	mqd->mqd_size = sizeof(struct v9_mqd);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_vi.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_vi.c
index 9fdc67b60bb4..137b208135a0 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_vi.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_vi.c
@@ -306,7 +306,13 @@ static int get_wave_state(struct mqd_manager *mm, void *mqd,
    return 0;
 }
-static void checkpoint_mqd(struct mqd_manager *mm, void *mqd, void *mqd_dst)
+static void get_checkpoint_info(struct mqd_manager *mm, void *mqd, u32 *ctl_stack_size)
+{
+	/* Control stack is stored in user mode */
+	*ctl_stack_size = 0;
+}
+
+static void checkpoint_mqd(struct mqd_manager *mm, void *mqd, void *mqd_dst, void *ctl_stack_dst)
 {
    struct vi_mqd *m;
@@ -318,7 +324,8 @@ static void checkpoint_mqd(struct mqd_manager *mm, void *mqd, void *mqd_dst)
 static void restore_mqd(struct mqd_manager *mm, void **mqd,
    		struct kfd_mem_obj *mqd_mem_obj, uint64_t *gart_addr,
    		struct queue_properties *qp,
-			const void *mqd_src)
+			const void *mqd_src,
+			const void *ctl_stack_src, const u32 ctl_stack_size)
 {
    uint64_t addr;
    struct vi_mqd *m;
@@ -341,7 +348,6 @@ static void restore_mqd(struct mqd_manager *mm, void **mqd,
    qp->is_active = 0;
 }
-
 static void init_mqd_hiq(struct mqd_manager *mm, void **mqd,
    		struct kfd_mem_obj *mqd_mem_obj, uint64_t *gart_addr,
    		struct queue_properties *q)
@@ -435,7 +441,10 @@ static bool is_occupied_sdma(struct mqd_manager *mm, void *mqd,
    return mm->dev->kfd2kgd->hqd_sdma_is_occupied(mm->dev->adev, mqd);
 }
-static void checkpoint_mqd_sdma(struct mqd_manager *mm, void *mqd, void *mqd_dst)
+static void checkpoint_mqd_sdma(struct mqd_manager *mm,
+				void *mqd,
+				void *mqd_dst,
+				void *ctl_stack_dst)
 {
    struct vi_sdma_mqd *m;
@@ -447,7 +456,8 @@ static void checkpoint_mqd_sdma(struct mqd_manager *mm, void *mqd, void *mqd_dst
 static void restore_mqd_sdma(struct mqd_manager *mm, void **mqd,
    		     struct kfd_mem_obj *mqd_mem_obj, uint64_t *gart_addr,
    		     struct queue_properties *qp,
-			     const void *mqd_src)
+			     const void *mqd_src,
+			     const void *ctl_stack_src, const u32 ctl_stack_size)
 {
    uint64_t addr;
    struct vi_sdma_mqd *m;
@@ -469,6 +479,7 @@ static void restore_mqd_sdma(struct mqd_manager *mm, void **mqd,
#if defined(CONFIG_DEBUG_FS)
+
 static int debugfs_show_mqd(struct seq_file *m, void *data)
 {
    seq_hex_dump(m, "    ", DUMP_PREFIX_OFFSET, 32, 4,
@@ -509,6 +520,7 @@ struct mqd_manager *mqd_manager_init_vi(enum KFD_MQD_TYPE type,
    	mqd->destroy_mqd = destroy_mqd;
    	mqd->is_occupied = is_occupied;
    	mqd->get_wave_state = get_wave_state;
+		mqd->get_checkpoint_info = get_checkpoint_info;
    	mqd->checkpoint_mqd = checkpoint_mqd;
    	mqd->restore_mqd = restore_mqd;
    	mqd->mqd_size = sizeof(struct vi_mqd);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index 1c62abe0dbd5..03242975078a 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -1159,6 +1159,7 @@ int pqm_create_queue(struct process_queue_manager *pqm,
    		    unsigned int *qid,
    		    const struct kfd_criu_queue_priv_data *q_data,
    		    const void *restore_mqd,
+			    const void *restore_ctl_stack,
    		    uint32_t *p_doorbell_offset_in_process);
 int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid);
 int pqm_update_queue_properties(struct process_queue_manager *pqm, unsigned int qid,
@@ -1183,8 +1184,8 @@ int amdkfd_fence_wait_timeout(uint64_t *fence_addr,
int pqm_get_queue_checkpoint_info(struct process_queue_manager *pqm,
    			  unsigned int qid,
-				  u32 *mqd_size);
-
+				  u32 *mqd_size,
+				  u32 *ctl_stack_size);
 /* Packet Manager */
#define KFD_FENCE_COMPLETED (100)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
index 844917c1c346..bd89dd0ca83e 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
@@ -209,6 +209,7 @@ int pqm_create_queue(struct process_queue_manager *pqm,
    		    unsigned int *qid,
    		    const struct kfd_criu_queue_priv_data *q_data,
    		    const void *restore_mqd,
+			    const void *restore_ctl_stack,
    		    uint32_t *p_doorbell_offset_in_process)
 {
    int retval;
@@ -273,7 +274,8 @@ int pqm_create_queue(struct process_queue_manager *pqm,
    		goto err_create_queue;
    	pqn->q = q;
    	pqn->kq = NULL;
-		retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd, q_data, restore_mqd);
+		retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd, q_data,
+						    restore_mqd, restore_ctl_stack);
    	print_queue(q);
    	break;
@@ -293,7 +295,8 @@ int pqm_create_queue(struct process_queue_manager *pqm,
    		goto err_create_queue;
    	pqn->q = q;
    	pqn->kq = NULL;
-		retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd, q_data, restore_mqd);
+		retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd, q_data,
+						    restore_mqd, restore_ctl_stack);
    	print_queue(q);
    	break;
    case KFD_QUEUE_TYPE_DIQ:
@@ -518,11 +521,17 @@ int pqm_get_wave_state(struct process_queue_manager *pqm,
    					       save_area_used_size);
 }
-static int get_queue_data_sizes(struct kfd_process_device *pdd, struct queue *q, uint32_t *mqd_size)
+static int get_queue_data_sizes(struct kfd_process_device *pdd,
+				struct queue *q,
+				uint32_t *mqd_size,
+				uint32_t *ctl_stack_size)
 {
    int ret;
-	ret = pqm_get_queue_checkpoint_info(&pdd->process->pqm, q->properties.queue_id, mqd_size);
+	ret = pqm_get_queue_checkpoint_info(&pdd->process->pqm,
+					    q->properties.queue_id,
+					    mqd_size,
+					    ctl_stack_size);
    if (ret)
    	pr_err("Failed to get queue dump info (%d)\n", ret);
@@ -548,14 +557,15 @@ int kfd_process_get_queue_info(struct kfd_process *p,
    		if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE ||
    			q->properties.type == KFD_QUEUE_TYPE_SDMA ||
    			q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI) {
-				uint32_t mqd_size;
+				uint32_t mqd_size, ctl_stack_size;
+
    			*num_queues = *num_queues + 1;
-				ret = get_queue_data_sizes(pdd, q, &mqd_size);
+				ret = get_queue_data_sizes(pdd, q, &mqd_size, &ctl_stack_size);
    			if (ret)
    				return ret;
-				extra_data_sizes += mqd_size;
+				extra_data_sizes += mqd_size + ctl_stack_size;
    		} else {
    			pr_err("Unsupported queue type (%d)\n", q->properties.type);
    			return -EOPNOTSUPP;
@@ -568,7 +578,10 @@ int kfd_process_get_queue_info(struct kfd_process *p,
    return 0;
 }
-static int pqm_checkpoint_mqd(struct process_queue_manager *pqm, unsigned int qid, void *mqd)
+static int pqm_checkpoint_mqd(struct process_queue_manager *pqm,
+			      unsigned int qid,
+			      void *mqd,
+			      void *ctl_stack)
 {
    struct process_queue_node *pqn;
@@ -583,17 +596,19 @@ static int pqm_checkpoint_mqd(struct process_queue_manager *pqm, unsigned int qi
    	return -EOPNOTSUPP;
    }
-	return pqn->q->device->dqm->ops.checkpoint_mqd(pqn->q->device->dqm, pqn->q, mqd);
+	return pqn->q->device->dqm->ops.checkpoint_mqd(pqn->q->device->dqm,
+						       pqn->q, mqd, ctl_stack);
 }
static int criu_checkpoint_queue(struct kfd_process_device *pdd,
    		   struct queue *q,
    		   struct kfd_criu_queue_priv_data *q_data)
 {
-	uint8_t *mqd;
+	uint8_t *mqd, *ctl_stack;
    int ret;
mqd = (void *)(q_data + 1);
+	ctl_stack = mqd + q_data->mqd_size;
q_data->gpu_id = pdd->dev->id;
    q_data->type = q->properties.type;
@@ -620,7 +635,7 @@ static int criu_checkpoint_queue(struct kfd_process_device *pdd,
    q_data->ctx_save_restore_area_size =
    	q->properties.ctx_save_restore_area_size;
-	ret = pqm_checkpoint_mqd(&pdd->process->pqm, q->properties.queue_id, mqd);
+	ret = pqm_checkpoint_mqd(&pdd->process->pqm, q->properties.queue_id, mqd, ctl_stack);
    if (ret) {
    	pr_err("Failed checkpoint queue_mqd (%d)\n", ret);
    	return ret;
@@ -644,6 +659,7 @@ static int criu_checkpoint_queues_device(struct kfd_process_device *pdd,
    	struct kfd_criu_queue_priv_data *q_data;
    	uint64_t q_data_size;
    	uint32_t mqd_size;
+		uint32_t ctl_stack_size;
if (q->properties.type != KFD_QUEUE_TYPE_COMPUTE &&
    		q->properties.type != KFD_QUEUE_TYPE_SDMA &&
@@ -654,11 +670,11 @@ static int criu_checkpoint_queues_device(struct kfd_process_device *pdd,
    		break;
    	}
-		ret = get_queue_data_sizes(pdd, q, &mqd_size);
+		ret = get_queue_data_sizes(pdd, q, &mqd_size, &ctl_stack_size);
    	if (ret)
    		break;
-		q_data_size = sizeof(*q_data) + mqd_size;
+		q_data_size = sizeof(*q_data) + mqd_size + ctl_stack_size;
/* Increase local buffer space if needed */
    	if (q_private_data_size < q_data_size) {
@@ -674,8 +690,9 @@ static int criu_checkpoint_queues_device(struct kfd_process_device *pdd,
q_data = (struct kfd_criu_queue_priv_data *)q_private_data;
-		/* data stored in this order: priv_data, mqd */
+		/* data stored in this order: priv_data, mqd, ctl_stack */
    	q_data->mqd_size = mqd_size;
+		q_data->ctl_stack_size = ctl_stack_size;
ret = criu_checkpoint_queue(pdd, q, q_data);
    	if (ret)
@@ -746,8 +763,8 @@ int kfd_criu_restore_queue(struct kfd_process *p,
    		   uint64_t *priv_data_offset,
    		   uint64_t max_priv_data_size)
 {
+	uint8_t *mqd, *ctl_stack, *q_extra_data = NULL;
    struct kfd_criu_queue_priv_data *q_data;
-	uint8_t *mqd, *q_extra_data = NULL;
    struct kfd_process_device *pdd;
    uint64_t q_extra_data_size;
    struct queue_properties qp;
@@ -769,7 +786,7 @@ int kfd_criu_restore_queue(struct kfd_process *p,
    }
*priv_data_offset += sizeof(*q_data);
-	q_extra_data_size = q_data->mqd_size;
+	q_extra_data_size = q_data->ctl_stack_size + q_data->mqd_size;
if (*priv_data_offset + q_extra_data_size > max_priv_data_size) {
    	ret = -EINVAL;
@@ -805,15 +822,17 @@ int kfd_criu_restore_queue(struct kfd_process *p,
    	ret = -EFAULT;
    	return ret;
    }
-	/* data stored in this order: mqd */
+	/* data stored in this order: mqd, ctl_stack */
    mqd = q_extra_data;
+	ctl_stack = mqd + q_data->mqd_size;
memset(&qp, 0, sizeof(qp));
    set_queue_properties_from_criu(&qp, q_data);
print_queue_properties(&qp);
-	ret = pqm_create_queue(&p->pqm, pdd->dev, NULL, &qp, &queue_id, q_data, mqd, NULL);
+	ret = pqm_create_queue(&p->pqm, pdd->dev, NULL, &qp, &queue_id, q_data, mqd, ctl_stack,
+				NULL);
    if (ret) {
    	pr_err("Failed to create new queue err:%d\n", ret);
    	ret = -EINVAL;
@@ -832,7 +851,8 @@ int kfd_criu_restore_queue(struct kfd_process *p,
int pqm_get_queue_checkpoint_info(struct process_queue_manager *pqm,
    			  unsigned int qid,
-				  uint32_t *mqd_size)
+				  uint32_t *mqd_size,
+				  uint32_t *ctl_stack_size)
 {
    struct process_queue_node *pqn;
@@ -847,7 +867,9 @@ int pqm_get_queue_checkpoint_info(struct process_queue_manager *pqm,
    	return -EOPNOTSUPP;
    }
-	pqn->q->device->dqm->ops.get_queue_checkpoint_info(pqn->q->device->dqm, pqn->q, mqd_size);
+	pqn->q->device->dqm->ops.get_queue_checkpoint_info(pqn->q->device->dqm,
+						       pqn->q, mqd_size,
+						       ctl_stack_size);
    return 0;
 }
-- 
2.17.1


    

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[Patch v5 13/24] drm/amdkfd: CRIU checkpoint and restore queue control stack