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Subject[PATCH 51/83] hsa/radeon: Add packet manager module
Date
From: Ben Goz <ben.goz@amd.com>

The packet manager module builds PM4 packets for the sole use of the CP
scheduler. Those packets are used by the HIQ to submit runlists to the CP.

Signed-off-by: Ben Goz <ben.goz@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
---
drivers/gpu/hsa/radeon/Makefile | 2 +-
drivers/gpu/hsa/radeon/kfd_packet_manager.c | 473 ++++++++++++++++++++++++++++
2 files changed, 474 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/hsa/radeon/kfd_packet_manager.c

diff --git a/drivers/gpu/hsa/radeon/Makefile b/drivers/gpu/hsa/radeon/Makefile
index f06d925..4978915 100644
--- a/drivers/gpu/hsa/radeon/Makefile
+++ b/drivers/gpu/hsa/radeon/Makefile
@@ -7,6 +7,6 @@ radeon_kfd-y := kfd_module.o kfd_device.o kfd_chardev.o \
kfd_doorbell.o kfd_sched_cik_static.o kfd_registers.o \
kfd_vidmem.o kfd_interrupt.o kfd_aperture.o \
kfd_queue.o kfd_hw_pointer_store.o kfd_mqd_manager.o \
- kfd_kernel_queue.o
+ kfd_kernel_queue.o kfd_packet_manager.o

obj-$(CONFIG_HSA_RADEON) += radeon_kfd.o
diff --git a/drivers/gpu/hsa/radeon/kfd_packet_manager.c b/drivers/gpu/hsa/radeon/kfd_packet_manager.c
new file mode 100644
index 0000000..4967b7c
--- /dev/null
+++ b/drivers/gpu/hsa/radeon/kfd_packet_manager.c
@@ -0,0 +1,473 @@
+/*
+ * packet_manager.c
+ *
+ * Created on: Mar 16, 2014
+ * Author: ben
+ */
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include "kfd_device_queue_manager.h"
+#include "kfd_kernel_queue.h"
+#include "kfd_priv.h"
+#include "kfd_pm4_headers.h"
+#include "kfd_pm4_opcodes.h"
+#include "cik_mqds.h"
+
+static inline void inc_wptr(unsigned int *wptr, unsigned int increment_bytes, unsigned int buffer_size_bytes)
+{
+ unsigned int temp = *wptr + increment_bytes / sizeof(uint32_t);
+
+ BUG_ON((temp * sizeof(uint32_t)) > buffer_size_bytes);
+ *wptr = temp;
+}
+
+static unsigned int build_pm4_header(unsigned int opcode, size_t packet_size)
+{
+ PM4_TYPE_3_HEADER header;
+
+ header.u32all = 0;
+ header.opcode = opcode;
+ header.count = packet_size/sizeof(uint32_t) - 2;
+ header.type = PM4_TYPE_3;
+
+ return header.u32all;
+}
+
+static void pm_calc_rlib_size(struct packet_manager *pm, unsigned int *rlib_size, bool *over_subscription)
+{
+ unsigned int process_count, queue_count;
+
+ BUG_ON(!pm || !rlib_size || !over_subscription);
+
+ process_count = pm->dqm->processes_count;
+ queue_count = pm->dqm->queue_count;
+
+ /* check if there is over subscription*/
+ *over_subscription = false;
+ if ((process_count >= VMID_PER_DEVICE) ||
+ queue_count >= PIPE_PER_ME_CP_SCHEDULING * QUEUES_PER_PIPE) {
+ *over_subscription = true;
+ pr_debug("kfd: over subscribed runlist\n");
+ }
+
+ /* calculate run list ib allocation size */
+ *rlib_size = process_count * sizeof(struct pm4_map_process) +
+ queue_count * sizeof(struct pm4_map_queues);
+
+ /* increase the allocation size in case we need a chained run list when over subscription */
+ if (*over_subscription)
+ *rlib_size += sizeof(struct pm4_runlist);
+
+ pr_debug("kfd: runlist ib size %d\n", *rlib_size);
+}
+
+static int pm_allocate_runlist_ib(struct packet_manager *pm, unsigned int **rl_buffer, uint64_t *rl_gpu_buffer,
+ unsigned int *rl_buffer_size, bool *is_over_subscription)
+{
+ int retval;
+
+ BUG_ON(!pm);
+ BUG_ON(pm->allocated == true);
+
+ pm_calc_rlib_size(pm, rl_buffer_size, is_over_subscription);
+ if (is_over_subscription &&
+ sched_policy == KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION)
+ return -EFAULT;
+
+ retval = radeon_kfd_vidmem_alloc_map(pm->dqm->dev, &pm->ib_buffer_obj, (void **)rl_buffer,
+ rl_gpu_buffer, ALIGN(*rl_buffer_size, PAGE_SIZE));
+ if (retval != 0) {
+ pr_err("kfd: failed to allocate runlist IB\n");
+ return retval;
+ }
+
+ memset(*rl_buffer, 0, *rl_buffer_size);
+ pm->allocated = true;
+ return retval;
+}
+
+static int pm_create_runlist(struct packet_manager *pm, uint32_t *buffer,
+ uint64_t ib, size_t ib_size_in_dwords, bool chain)
+{
+ struct pm4_runlist *packet;
+
+ BUG_ON(!pm || !buffer || !ib);
+
+ packet = (struct pm4_runlist *)buffer;
+
+ memset(buffer, 0, sizeof(struct pm4_runlist));
+ packet->header.u32all = build_pm4_header(IT_RUN_LIST, sizeof(struct pm4_runlist));
+
+ packet->bitfields4.ib_size = ib_size_in_dwords;
+ packet->bitfields4.chain = chain ? 1 : 0;
+ packet->bitfields4.offload_polling = 0;
+ packet->bitfields4.valid = 1;
+ packet->bitfields4.vmid = 0;
+ packet->ordinal2 = lower_32(ib);
+ packet->bitfields3.ib_base_hi = upper_32(ib);
+
+ return 0;
+}
+
+static int pm_create_map_process(struct packet_manager *pm, uint32_t *buffer, struct qcm_process_device *qpd)
+{
+ struct pm4_map_process *packet;
+
+ BUG_ON(!pm || !buffer || !qpd);
+
+ packet = (struct pm4_map_process *)buffer;
+
+ pr_debug("kfd: In func %s\n", __func__);
+
+ memset(buffer, 0, sizeof(struct pm4_map_process));
+
+ packet->header.u32all = build_pm4_header(IT_MAP_PROCESS, sizeof(struct pm4_map_process));
+ packet->bitfields2.diq_enable = (qpd->is_debug) ? 1 : 0;
+ packet->bitfields2.pasid = qpd->pqm->process->pasid;
+ packet->bitfields3.page_table_base = qpd->page_table_base;
+ packet->bitfields4.gds_size = qpd->gds_size;
+ packet->bitfields4.num_gws = qpd->num_gws;
+ packet->bitfields4.num_oac = qpd->num_oac;
+
+ packet->sh_mem_config = qpd->sh_mem_config;
+ packet->sh_mem_bases = qpd->sh_mem_bases;
+ packet->sh_mem_ape1_base = qpd->sh_mem_ape1_base;
+ packet->sh_mem_ape1_limit = qpd->sh_mem_ape1_limit;
+
+ packet->gds_addr_lo = lower_32(qpd->gds_context_area);
+ packet->gds_addr_hi = upper_32(qpd->gds_context_area);
+
+ return 0;
+}
+
+static int pm_create_map_queue(struct packet_manager *pm, uint32_t *buffer, struct queue *q)
+{
+ struct pm4_map_queues *packet;
+
+ BUG_ON(!pm || !buffer || !q);
+
+ pr_debug("kfd: In func %s\n", __func__);
+
+ packet = (struct pm4_map_queues *)buffer;
+ memset(buffer, 0, sizeof(struct pm4_map_queues));
+
+ packet->header.u32all = build_pm4_header(IT_MAP_QUEUES, sizeof(struct pm4_map_queues));
+ packet->bitfields2.alloc_format = alloc_format___map_queues__one_per_pipe;
+ packet->bitfields2.num_queues = 1;
+ packet->bitfields2.queue_sel = queue_sel___map_queues__map_to_hws_determined_queue_slots;
+ packet->bitfields2.vidmem = (q->properties.is_interop) ? vidmem___map_queues__uses_video_memory :
+ vidmem___map_queues__uses_no_video_memory;
+
+ switch (q->properties.type) {
+ case KFD_QUEUE_TYPE_COMPUTE:
+ case KFD_QUEUE_TYPE_DIQ:
+ packet->bitfields2.engine_sel = engine_sel___map_queues__compute;
+ break;
+ case KFD_QUEUE_TYPE_SDMA:
+ packet->bitfields2.engine_sel = engine_sel___map_queues__sdma0_queue;
+ break;
+ default:
+ BUG();
+ break;
+ }
+
+ packet->_map_queues_ordinals[0].bitfields3.doorbell_offset = q->properties.doorbell_off;
+ packet->_map_queues_ordinals[0].mqd_addr_lo = lower_32(q->gart_mqd_addr);
+ packet->_map_queues_ordinals[0].mqd_addr_hi = upper_32(q->gart_mqd_addr);
+ packet->_map_queues_ordinals[0].wptr_addr_lo = lower_32((uint64_t)q->properties.write_ptr);
+ packet->_map_queues_ordinals[0].wptr_addr_hi = upper_32((uint64_t)q->properties.write_ptr);
+
+ return 0;
+}
+
+static int pm_create_runlist_ib(struct packet_manager *pm, struct list_head *queues,
+ uint64_t *rl_gpu_addr, size_t *rl_size_bytes)
+{
+ unsigned int alloc_size_bytes;
+ unsigned int *rl_buffer, rl_wptr, i;
+ int retval, proccesses_mapped;
+ struct device_process_node *cur;
+ struct qcm_process_device *qpd;
+ struct queue *q;
+ struct kernel_queue *kq;
+ bool is_over_subscription;
+
+ BUG_ON(!pm || !queues || !rl_size_bytes || !rl_gpu_addr);
+
+ rl_wptr = retval = proccesses_mapped = 0;
+
+ retval = pm_allocate_runlist_ib(pm, &rl_buffer, rl_gpu_addr, &alloc_size_bytes, &is_over_subscription);
+ if (retval != 0)
+ return retval;
+
+ *rl_size_bytes = alloc_size_bytes;
+
+ pr_debug("kfd: In func %s\n", __func__);
+ pr_debug("kfd: building runlist ib process count: %d queues count %d\n", pm->dqm->processes_count,
+ pm->dqm->queue_count);
+
+ /* build the run list ib packet */
+ list_for_each_entry(cur, queues, list) {
+ qpd = cur->qpd;
+ /* build map process packet */
+ if (proccesses_mapped >= pm->dqm->processes_count) {
+ pr_debug("kfd: not enough space left in runlist IB\n");
+ pm_release_ib(pm);
+ return -ENOMEM;
+ }
+ retval = pm_create_map_process(pm, &rl_buffer[rl_wptr], qpd);
+ if (retval != 0)
+ return retval;
+ proccesses_mapped++;
+ inc_wptr(&rl_wptr, sizeof(struct pm4_map_process), alloc_size_bytes);
+ list_for_each_entry(kq, &qpd->priv_queue_list, list) {
+ if (kq->queue->properties.is_active != true)
+ continue;
+ retval = pm_create_map_queue(pm, &rl_buffer[rl_wptr], kq->queue);
+ if (retval != 0)
+ return retval;
+ inc_wptr(&rl_wptr, sizeof(struct pm4_map_queues), alloc_size_bytes);
+ }
+
+ list_for_each_entry(q, &qpd->queues_list, list) {
+ if (q->properties.is_active != true)
+ continue;
+ retval = pm_create_map_queue(pm, &rl_buffer[rl_wptr], q);
+ if (retval != 0)
+ return retval;
+ inc_wptr(&rl_wptr, sizeof(struct pm4_map_queues), alloc_size_bytes);
+ }
+ }
+
+ pr_debug("kfd: finished map process and queues to runlist\n");
+
+ if (is_over_subscription)
+ pm_create_runlist(pm, &rl_buffer[rl_wptr], *rl_gpu_addr, alloc_size_bytes / sizeof(uint32_t), true);
+
+ for (i = 0; i < alloc_size_bytes / sizeof(uint32_t); i++)
+ pr_debug("0x%2X ", rl_buffer[i]);
+ pr_debug("\n");
+
+ return 0;
+}
+
+int pm_init(struct packet_manager *pm, struct device_queue_manager *dqm)
+{
+ BUG_ON(!dqm);
+
+ pm->dqm = dqm;
+ mutex_init(&pm->lock);
+ pm->priv_queue = kernel_queue_init(dqm->dev, KFD_QUEUE_TYPE_HIQ);
+ if (pm->priv_queue == NULL) {
+ mutex_destroy(&pm->lock);
+ return -ENOMEM;
+ }
+ pm->allocated = false;
+
+ return 0;
+}
+
+void pm_uninit(struct packet_manager *pm)
+{
+ BUG_ON(!pm);
+
+ mutex_destroy(&pm->lock);
+ kernel_queue_uninit(pm->priv_queue);
+}
+
+int pm_send_set_resources(struct packet_manager *pm, struct scheduling_resources *res)
+{
+ struct pm4_set_resources *packet;
+
+ BUG_ON(!pm || !res);
+
+ pr_debug("kfd: In func %s\n", __func__);
+
+ mutex_lock(&pm->lock);
+ pm->priv_queue->acquire_packet_buffer(pm->priv_queue, sizeof(*packet) / sizeof(uint32_t),
+ (unsigned int **)&packet);
+ if (packet == NULL) {
+ mutex_unlock(&pm->lock);
+ pr_err("kfd: failed to allocate buffer on kernel queue\n");
+ return -ENOMEM;
+ }
+
+ memset(packet, 0, sizeof(struct pm4_set_resources));
+ packet->header.u32all = build_pm4_header(IT_SET_RESOURCES, sizeof(struct pm4_set_resources));
+
+ packet->bitfields2.queue_type = queue_type___set_resources__hsa_interface_queue_hiq;
+ packet->bitfields2.vmid_mask = res->vmid_mask;
+ packet->bitfields2.unmap_latency = KFD_UNMAP_LATENCY;
+ packet->bitfields3.oac_mask = res->oac_mask;
+ packet->bitfields4.gds_heap_base = res->gds_heap_base;
+ packet->bitfields4.gds_heap_size = res->gds_heap_size;
+
+ packet->gws_mask_lo = lower_32(res->gws_mask);
+ packet->gws_mask_hi = upper_32(res->gws_mask);
+
+ packet->queue_mask_lo = lower_32(res->queue_mask);
+ packet->queue_mask_hi = upper_32(res->queue_mask);
+
+ pm->priv_queue->submit_packet(pm->priv_queue);
+ pm->priv_queue->sync_with_hw(pm->priv_queue, KFD_HIQ_TIMEOUT);
+
+ mutex_unlock(&pm->lock);
+
+ return 0;
+}
+
+int pm_send_runlist(struct packet_manager *pm, struct list_head *dqm_queues)
+{
+ uint64_t rl_gpu_ib_addr;
+ uint32_t *rl_buffer;
+ size_t rl_ib_size, packet_size_dwords;
+ int retval;
+
+ BUG_ON(!pm || !dqm_queues);
+
+ retval = pm_create_runlist_ib(pm, dqm_queues, &rl_gpu_ib_addr, &rl_ib_size);
+ if (retval != 0)
+ goto fail_create_runlist_ib;
+
+ pr_debug("kfd: runlist IB address: 0x%llX\n", rl_gpu_ib_addr);
+
+ packet_size_dwords = sizeof(struct pm4_runlist) / sizeof(uint32_t);
+ mutex_lock(&pm->lock);
+
+ retval = pm->priv_queue->acquire_packet_buffer(pm->priv_queue, packet_size_dwords, &rl_buffer);
+ if (retval != 0)
+ goto fail_acquire_packet_buffer;
+
+ retval = pm_create_runlist(pm, rl_buffer, rl_gpu_ib_addr, rl_ib_size / sizeof(uint32_t), false);
+ if (retval != 0)
+ goto fail_create_runlist;
+
+ pm->priv_queue->submit_packet(pm->priv_queue);
+ pm->priv_queue->sync_with_hw(pm->priv_queue, KFD_HIQ_TIMEOUT);
+
+ mutex_unlock(&pm->lock);
+
+ return retval;
+
+fail_create_runlist:
+ pm->priv_queue->rollback_packet(pm->priv_queue);
+fail_acquire_packet_buffer:
+ mutex_unlock(&pm->lock);
+fail_create_runlist_ib:
+ if (pm->allocated == true)
+ pm_release_ib(pm);
+ return retval;
+}
+
+int pm_send_query_status(struct packet_manager *pm, uint64_t fence_address, uint32_t fence_value)
+{
+ int retval;
+ struct pm4_query_status *packet;
+
+ BUG_ON(!pm || !fence_address);
+
+ mutex_lock(&pm->lock);
+ retval = pm->priv_queue->acquire_packet_buffer(pm->priv_queue,
+ sizeof(struct pm4_query_status) / sizeof(uint32_t), (unsigned int **)&packet);
+ if (retval != 0)
+ goto fail_acquire_packet_buffer;
+
+ packet->header.u32all = build_pm4_header(IT_QUERY_STATUS, sizeof(struct pm4_query_status));
+
+ packet->bitfields2.context_id = 0;
+ packet->bitfields2.interrupt_sel = interrupt_sel___query_status__completion_status;
+ packet->bitfields2.command = command___query_status__fence_only_after_write_ack;
+
+ packet->addr_hi = upper_32((uint64_t)fence_address);
+ packet->addr_lo = lower_32((uint64_t)fence_address);
+ packet->data_hi = upper_32((uint64_t)fence_value);
+ packet->data_lo = lower_32((uint64_t)fence_value);
+
+ pm->priv_queue->submit_packet(pm->priv_queue);
+ pm->priv_queue->sync_with_hw(pm->priv_queue, KFD_HIQ_TIMEOUT);
+ mutex_unlock(&pm->lock);
+
+ return 0;
+
+fail_acquire_packet_buffer:
+ mutex_unlock(&pm->lock);
+ return retval;
+}
+
+int pm_send_unmap_queue(struct packet_manager *pm, enum kfd_queue_type type,
+ enum kfd_preempt_type_filter mode, uint32_t filter_param, bool reset)
+{
+ int retval;
+ uint32_t *buffer;
+ struct pm4_unmap_queues *packet;
+
+ BUG_ON(!pm);
+
+ mutex_lock(&pm->lock);
+ retval = pm->priv_queue->acquire_packet_buffer(pm->priv_queue,
+ sizeof(struct pm4_unmap_queues) / sizeof(uint32_t), &buffer);
+ if (retval != 0)
+ goto err_acquire_packet_buffer;
+
+ packet = (struct pm4_unmap_queues *)buffer;
+ memset(buffer, 0, sizeof(struct pm4_unmap_queues));
+
+ packet->header.u32all = build_pm4_header(IT_UNMAP_QUEUES, sizeof(struct pm4_unmap_queues));
+ switch (type) {
+ case KFD_QUEUE_TYPE_COMPUTE:
+ case KFD_QUEUE_TYPE_DIQ:
+ packet->bitfields2.engine_sel = engine_sel___unmap_queues__compute;
+ break;
+ case KFD_QUEUE_TYPE_SDMA:
+ packet->bitfields2.engine_sel = engine_sel___unmap_queues__sdma0;
+ break;
+ default:
+ BUG();
+ break;
+ }
+
+ if (reset)
+ packet->bitfields2.action = action___unmap_queues__reset_queues;
+ else
+ packet->bitfields2.action = action___unmap_queues__preempt_queues;
+
+ switch (mode) {
+ case KFD_PREEMPT_TYPE_FILTER_SINGLE_QUEUE:
+ packet->bitfields2.queue_sel = queue_sel___unmap_queues__perform_request_on_specified_queues;
+ packet->bitfields2.num_queues = 1;
+ packet->bitfields4.doorbell_offset0 = filter_param;
+ break;
+ case KFD_PRERMPT_TYPE_FILTER_BY_PASID:
+ packet->bitfields2.queue_sel = queue_sel___unmap_queues__perform_request_on_pasid_queues;
+ packet->bitfields3.pasid = filter_param;
+ break;
+ case KFD_PRERMPT_TYPE_FILTER_ALL_QUEUES:
+ packet->bitfields2.queue_sel = queue_sel___unmap_queues__perform_request_on_all_active_queues;
+ break;
+ default:
+ BUG();
+ break;
+ };
+
+ pm->priv_queue->submit_packet(pm->priv_queue);
+ pm->priv_queue->sync_with_hw(pm->priv_queue, KFD_HIQ_TIMEOUT);
+
+ mutex_unlock(&pm->lock);
+ return 0;
+
+err_acquire_packet_buffer:
+ mutex_unlock(&pm->lock);
+ return retval;
+}
+
+void pm_release_ib(struct packet_manager *pm)
+{
+ BUG_ON(!pm);
+
+ mutex_lock(&pm->lock);
+ if (pm->allocated) {
+ radeon_kfd_vidmem_free_unmap(pm->dqm->dev, pm->ib_buffer_obj);
+ pm->allocated = false;
+ }
+ mutex_unlock(&pm->lock);
+}
--
1.9.1


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