[PATCH v2 3/7] drm/amdkfd: Add SDMA mqd support

[Oded Gabbay <oded.gabbay@amd.com>]

From: Ben Goz <ben.goz@amd.com>

This patch adds support for SDMA mqd operations:
- init_mqd_sdma
- uninit_mqd_sdma
- load_mqd_sdma
- update_mqd_sdma
- destroy_mqd_sdma
- is_occupied_sdma

It also adds SDMA queue information to some private structures of amdkfd.

Signed-off-by: Ben Goz <ben.goz@amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager.c | 121 +++++++++++++++++++++++++++
 drivers/gpu/drm/amd/amdkfd/kfd_priv.h        |   8 ++
 2 files changed, 129 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager.c
index adc3147..9eda956 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager.c
@@ -111,6 +111,37 @@ static int init_mqd(struct mqd_manager *mm, void **mqd,
 	return retval;
 }
 
+static int init_mqd_sdma(struct mqd_manager *mm, void **mqd,
+			struct kfd_mem_obj **mqd_mem_obj, uint64_t *gart_addr,
+			struct queue_properties *q)
+{
+	int retval;
+	struct cik_sdma_rlc_registers *m;
+
+	BUG_ON(!mm || !mqd || !mqd_mem_obj);
+
+	retval = kfd2kgd->allocate_mem(mm->dev->kgd,
+					sizeof(struct cik_sdma_rlc_registers),
+					256,
+					KFD_MEMPOOL_SYSTEM_WRITECOMBINE,
+					(struct kgd_mem **) mqd_mem_obj);
+
+	if (retval != 0)
+		return -ENOMEM;
+
+	m = (struct cik_sdma_rlc_registers *) (*mqd_mem_obj)->cpu_ptr;
+
+	memset(m, 0, sizeof(struct cik_sdma_rlc_registers));
+
+	*mqd = m;
+	if (gart_addr != NULL)
+		*gart_addr = (*mqd_mem_obj)->gpu_addr;
+
+	retval = mm->update_mqd(mm, m, q);
+
+	return retval;
+}
+
 static void uninit_mqd(struct mqd_manager *mm, void *mqd,
 			struct kfd_mem_obj *mqd_mem_obj)
 {
@@ -118,11 +149,24 @@ static void uninit_mqd(struct mqd_manager *mm, void *mqd,
 	kfd2kgd->free_mem(mm->dev->kgd, (struct kgd_mem *) mqd_mem_obj);
 }
 
+static void uninit_mqd_sdma(struct mqd_manager *mm, void *mqd,
+				struct kfd_mem_obj *mqd_mem_obj)
+{
+	BUG_ON(!mm || !mqd);
+	kfd2kgd->free_mem(mm->dev->kgd, (struct kgd_mem *) mqd_mem_obj);
+}
+
 static int load_mqd(struct mqd_manager *mm, void *mqd, uint32_t pipe_id,
 			uint32_t queue_id, uint32_t __user *wptr)
 {
 	return kfd2kgd->hqd_load(mm->dev->kgd, mqd, pipe_id, queue_id, wptr);
+}
 
+static int load_mqd_sdma(struct mqd_manager *mm, void *mqd,
+			uint32_t pipe_id, uint32_t queue_id,
+			uint32_t __user *wptr)
+{
+	return kfd2kgd->hqd_sdma_load(mm->dev->kgd, mqd);
 }
 
 static int update_mqd(struct mqd_manager *mm, void *mqd,
@@ -170,6 +214,41 @@ static int update_mqd(struct mqd_manager *mm, void *mqd,
 	return 0;
 }
 
+static int update_mqd_sdma(struct mqd_manager *mm, void *mqd,
+				struct queue_properties *q)
+{
+	struct cik_sdma_rlc_registers *m;
+
+	BUG_ON(!mm || !mqd || !q);
+
+	m = get_sdma_mqd(mqd);
+	m->sdma_rlc_rb_cntl =
+			RB_SIZE((ffs(q->queue_size / sizeof(unsigned int)))) |
+			RB_VMID(q->vmid) |
+			RPTR_WRITEBACK_ENABLE |
+			RPTR_WRITEBACK_TIMER(6);
+
+	m->sdma_rlc_rb_base = lower_32_bits(q->queue_address >> 8);
+	m->sdma_rlc_rb_base_hi = upper_32_bits(q->queue_address >> 8);
+	m->sdma_rlc_rb_rptr_addr_lo = lower_32_bits((uint64_t)q->read_ptr);
+	m->sdma_rlc_rb_rptr_addr_hi = upper_32_bits((uint64_t)q->read_ptr);
+	m->sdma_rlc_doorbell = OFFSET(q->doorbell_off) | DB_ENABLE;
+	m->sdma_rlc_virtual_addr = q->sdma_vm_addr;
+
+	m->sdma_engine_id = q->sdma_engine_id;
+	m->sdma_queue_id = q->sdma_queue_id;
+
+	q->is_active = false;
+	if (q->queue_size > 0 &&
+			q->queue_address != 0 &&
+			q->queue_percent > 0) {
+		m->sdma_rlc_rb_cntl |= RB_ENABLE;
+		q->is_active = true;
+	}
+
+	return 0;
+}
+
 static int destroy_mqd(struct mqd_manager *mm, void *mqd,
 			enum kfd_preempt_type type,
 			unsigned int timeout, uint32_t pipe_id,
@@ -179,6 +258,18 @@ static int destroy_mqd(struct mqd_manager *mm, void *mqd,
 					pipe_id, queue_id);
 }
 
+/*
+ * preempt type here is ignored because there is only one way
+ * to preempt sdma queue
+ */
+static int destroy_mqd_sdma(struct mqd_manager *mm, void *mqd,
+				enum kfd_preempt_type type,
+				unsigned int timeout, uint32_t pipe_id,
+				uint32_t queue_id)
+{
+	return kfd2kgd->hqd_sdma_destroy(mm->dev->kgd, mqd, timeout);
+}
+
 static bool is_occupied(struct mqd_manager *mm, void *mqd,
 			uint64_t queue_address,	uint32_t pipe_id,
 			uint32_t queue_id)
@@ -189,6 +280,13 @@ static bool is_occupied(struct mqd_manager *mm, void *mqd,
 
 }
 
+static bool is_occupied_sdma(struct mqd_manager *mm, void *mqd,
+			uint64_t queue_address,	uint32_t pipe_id,
+			uint32_t queue_id)
+{
+	return kfd2kgd->hqd_sdma_is_occupied(mm->dev->kgd, mqd);
+}
+
 /*
  * HIQ MQD Implementation, concrete implementation for HIQ MQD implementation.
  * The HIQ queue in Kaveri is using the same MQD structure as all the user mode
@@ -301,6 +399,21 @@ static int update_mqd_hiq(struct mqd_manager *mm, void *mqd,
 	return 0;
 }
 
+/*
+ * SDMA MQD Implementation
+ */
+
+struct cik_sdma_rlc_registers *get_sdma_mqd(void *mqd)
+{
+	struct cik_sdma_rlc_registers *m;
+
+	BUG_ON(!mqd);
+
+	m = (struct cik_sdma_rlc_registers *)mqd;
+
+	return m;
+}
+
 struct mqd_manager *mqd_manager_init(enum KFD_MQD_TYPE type,
 					struct kfd_dev *dev)
 {
@@ -335,6 +448,14 @@ struct mqd_manager *mqd_manager_init(enum KFD_MQD_TYPE type,
 		mqd->destroy_mqd = destroy_mqd;
 		mqd->is_occupied = is_occupied;
 		break;
+	case KFD_MQD_TYPE_CIK_SDMA:
+		mqd->init_mqd = init_mqd_sdma;
+		mqd->uninit_mqd = uninit_mqd_sdma;
+		mqd->load_mqd = load_mqd_sdma;
+		mqd->update_mqd = update_mqd_sdma;
+		mqd->destroy_mqd = destroy_mqd_sdma;
+		mqd->is_occupied = is_occupied_sdma;
+		break;
 	default:
 		kfree(mqd);
 		return NULL;
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index f9fb81e..11b6935 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -285,6 +285,10 @@ struct queue_properties {
 	bool is_active;
 	/* Not relevant for user mode queues in cp scheduling */
 	unsigned int vmid;
+	/* Relevant only for sdma queues*/
+	uint32_t sdma_engine_id;
+	uint32_t sdma_queue_id;
+	uint32_t sdma_vm_addr;
 };
 
 /**
@@ -327,6 +331,8 @@ struct queue {
 	uint32_t pipe;
 	uint32_t queue;
 
+	unsigned int sdma_id;
+
 	struct kfd_process	*process;
 	struct kfd_dev		*device;
 };
@@ -528,6 +534,8 @@ int kfd_init_apertures(struct kfd_process *process);
 /* Queue Context Management */
 inline uint32_t lower_32(uint64_t x);
 inline uint32_t upper_32(uint64_t x);
+struct cik_sdma_rlc_registers *get_sdma_mqd(void *mqd);
+inline uint32_t get_sdma_base_addr(struct cik_sdma_rlc_registers *m);
 
 int init_queue(struct queue **q, struct queue_properties properties);
 void uninit_queue(struct queue *q);
-- 
2.1.0

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