drm/amdkfd: Add multiple kgd support

The current code can only support one kgd instance. We have to
support multiple kgd instances in one system. i.e two amdgpu or two
radeon or one amdgpu + one radeon or more than two kgd instances.

Signed-off-by: Xihan Zhang <xihan.zhang@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>

8 files changed, 53 insertions, 47 deletions

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index 50fc8bad4964..19a4fba46e4e 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -442,7 +442,8 @@ static int kfd_ioctl_get_clock_counters(struct file *filep,
                 return -EINVAL;
 
         /* Reading GPU clock counter from KGD */
-        args->gpu_clock_counter = kfd2kgd->get_gpu_clock_counter(dev->kgd);
+        args->gpu_clock_counter =
+                dev->kfd2kgd->get_gpu_clock_counter(dev->kgd);
 
         /* No access to rdtsc. Using raw monotonic time */
         getrawmonotonic64(&time);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
index 5bc32c26b989..ca7f2d3af2ff 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
@@ -94,7 +94,8 @@ static const struct kfd_device_info *lookup_device_info(unsigned short did)
         return NULL;
 }
 
-struct kfd_dev *kgd2kfd_probe(struct kgd_dev *kgd, struct pci_dev *pdev)
+struct kfd_dev *kgd2kfd_probe(struct kgd_dev *kgd,
+        struct pci_dev *pdev, const struct kfd2kgd_calls *f2g)
 {
         struct kfd_dev *kfd;
 
@@ -112,6 +113,11 @@ struct kfd_dev *kgd2kfd_probe(struct kgd_dev *kgd, struct pci_dev *pdev)
         kfd->device_info = device_info;
         kfd->pdev = pdev;
         kfd->init_complete = false;
+        kfd->kfd2kgd = f2g;
+
+        mutex_init(&kfd->doorbell_mutex);
+        memset(&kfd->doorbell_available_index, 0,
+                sizeof(kfd->doorbell_available_index));
 
         return kfd;
 }
@@ -200,8 +206,9 @@ bool kgd2kfd_device_init(struct kfd_dev *kfd,
         /* add another 512KB for all other allocations on gart (HPD, fences) */
         size += 512 * 1024;
 
-        if (kfd2kgd->init_gtt_mem_allocation(kfd->kgd, size, &kfd->gtt_mem,
-                        &kfd->gtt_start_gpu_addr, &kfd->gtt_start_cpu_ptr)) {
+        if (kfd->kfd2kgd->init_gtt_mem_allocation(
+                        kfd->kgd, size, &kfd->gtt_mem,
+                        &kfd->gtt_start_gpu_addr, &kfd->gtt_start_cpu_ptr)){
                 dev_err(kfd_device,
                         "Could not allocate %d bytes for device (%x:%x)\n",
                         size, kfd->pdev->vendor, kfd->pdev->device);
@@ -270,7 +277,7 @@ device_iommu_pasid_error:
 kfd_topology_add_device_error:
         kfd_gtt_sa_fini(kfd);
 kfd_gtt_sa_init_error:
-        kfd2kgd->free_gtt_mem(kfd->kgd, kfd->gtt_mem);
+        kfd->kfd2kgd->free_gtt_mem(kfd->kgd, kfd->gtt_mem);
         dev_err(kfd_device,
                 "device (%x:%x) NOT added due to errors\n",
                 kfd->pdev->vendor, kfd->pdev->device);
@@ -285,7 +292,7 @@ void kgd2kfd_device_exit(struct kfd_dev *kfd)
                 amd_iommu_free_device(kfd->pdev);
                 kfd_topology_remove_device(kfd);
                 kfd_gtt_sa_fini(kfd);
-                kfd2kgd->free_gtt_mem(kfd->kgd, kfd->gtt_mem);
+                kfd->kfd2kgd->free_gtt_mem(kfd->kgd, kfd->gtt_mem);
         }
 
         kfree(kfd);
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 be68d58b564e..d7174300f501 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
@@ -82,7 +82,8 @@ static inline unsigned int get_pipes_num_cpsch(void)
 void program_sh_mem_settings(struct device_queue_manager *dqm,
                                         struct qcm_process_device *qpd)
 {
-        return kfd2kgd->program_sh_mem_settings(dqm->dev->kgd, qpd->vmid,
+        return dqm->dev->kfd2kgd->program_sh_mem_settings(
+                                                dqm->dev->kgd, qpd->vmid,
                                                 qpd->sh_mem_config,
                                                 qpd->sh_mem_ape1_base,
                                                 qpd->sh_mem_ape1_limit,
@@ -457,9 +458,12 @@ set_pasid_vmid_mapping(struct device_queue_manager *dqm, unsigned int pasid,
 {
         uint32_t pasid_mapping;
 
-        pasid_mapping = (pasid == 0) ? 0 : (uint32_t)pasid |
-                                                ATC_VMID_PASID_MAPPING_VALID;
-        return kfd2kgd->set_pasid_vmid_mapping(dqm->dev->kgd, pasid_mapping,
+        pasid_mapping = (pasid == 0) ? 0 :
+                (uint32_t)pasid |
+                ATC_VMID_PASID_MAPPING_VALID;
+
+        return dqm->dev->kfd2kgd->set_pasid_vmid_mapping(
+                                                dqm->dev->kgd, pasid_mapping,
                                                 vmid);
 }
 
@@ -511,7 +515,7 @@ int init_pipelines(struct device_queue_manager *dqm,
                 pipe_hpd_addr = dqm->pipelines_addr + i * CIK_HPD_EOP_BYTES;
                 pr_debug("kfd: pipeline address %llX\n", pipe_hpd_addr);
                 /* = log2(bytes/4)-1 */
-                kfd2kgd->init_pipeline(dqm->dev->kgd, inx,
+                dqm->dev->kfd2kgd->init_pipeline(dqm->dev->kgd, inx,
                                 CIK_HPD_EOP_BYTES_LOG2 - 3, pipe_hpd_addr);
         }
 
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c b/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c
index 1a9b355dd114..17e56dcc8540 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c
@@ -32,9 +32,6 @@
  * and that's assures that any user process won't get access to the
  * kernel doorbells page
  */
-static DEFINE_MUTEX(doorbell_mutex);
-static unsigned long doorbell_available_index[
-        DIV_ROUND_UP(KFD_MAX_NUM_OF_QUEUES_PER_PROCESS, BITS_PER_LONG)] = { 0 };
 
 #define KERNEL_DOORBELL_PASID 1
 #define KFD_SIZE_OF_DOORBELL_IN_BYTES 4
@@ -170,12 +167,12 @@ u32 __iomem *kfd_get_kernel_doorbell(struct kfd_dev *kfd,
 
         BUG_ON(!kfd || !doorbell_off);
 
-        mutex_lock(&doorbell_mutex);
-        inx = find_first_zero_bit(doorbell_available_index,
+        mutex_lock(&kfd->doorbell_mutex);
+        inx = find_first_zero_bit(kfd->doorbell_available_index,
                                         KFD_MAX_NUM_OF_QUEUES_PER_PROCESS);
 
-        __set_bit(inx, doorbell_available_index);
-        mutex_unlock(&doorbell_mutex);
+        __set_bit(inx, kfd->doorbell_available_index);
+        mutex_unlock(&kfd->doorbell_mutex);
 
         if (inx >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS)
                 return NULL;
@@ -203,9 +200,9 @@ void kfd_release_kernel_doorbell(struct kfd_dev *kfd, u32 __iomem *db_addr)
 
         inx = (unsigned int)(db_addr - kfd->doorbell_kernel_ptr);
 
-        mutex_lock(&doorbell_mutex);
-        __clear_bit(inx, doorbell_available_index);
-        mutex_unlock(&doorbell_mutex);
+        mutex_lock(&kfd->doorbell_mutex);
+        __clear_bit(inx, kfd->doorbell_available_index);
+        mutex_unlock(&kfd->doorbell_mutex);
 }
 
 inline void write_kernel_doorbell(u32 __iomem *db, u32 value)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_module.c b/drivers/gpu/drm/amd/amdkfd/kfd_module.c
index 3f34ae16f075..4e0a68f13a77 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_module.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_module.c
@@ -34,7 +34,6 @@
 #define KFD_DRIVER_MINOR        7
 #define KFD_DRIVER_PATCHLEVEL   1
 
-const struct kfd2kgd_calls *kfd2kgd;
 static const struct kgd2kfd_calls kgd2kfd = {
         .exit           = kgd2kfd_exit,
         .probe          = kgd2kfd_probe,
@@ -55,9 +54,7 @@ module_param(max_num_of_queues_per_device, int, 0444);
 MODULE_PARM_DESC(max_num_of_queues_per_device,
         "Maximum number of supported queues per device (1 = Minimum, 4096 = default)");
 
-bool kgd2kfd_init(unsigned interface_version,
-                  const struct kfd2kgd_calls *f2g,
-                  const struct kgd2kfd_calls **g2f)
+bool kgd2kfd_init(unsigned interface_version, const struct kgd2kfd_calls **g2f)
 {
         /*
          * Only one interface version is supported,
@@ -66,11 +63,6 @@ bool kgd2kfd_init(unsigned interface_version,
         if (interface_version != KFD_INTERFACE_VERSION)
                 return false;
 
-        /* Protection against multiple amd kgd loads */
-        if (kfd2kgd)
-                return true;
-
-        kfd2kgd = f2g;
         *g2f = &kgd2kfd;
 
         return true;
@@ -85,8 +77,6 @@ static int __init kfd_module_init(void)
 {
         int err;
 
-        kfd2kgd = NULL;
-
         /* Verify module parameters */
         if ((sched_policy < KFD_SCHED_POLICY_HWS) ||
                 (sched_policy > KFD_SCHED_POLICY_NO_HWS)) {
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 a09e18a339f3..434979428fc0 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager_cik.c
@@ -151,14 +151,15 @@ static void uninit_mqd_sdma(struct mqd_manager *mm, void *mqd,
 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);
+        return mm->dev->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);
+        return mm->dev->kfd2kgd->hqd_sdma_load(mm->dev->kgd, mqd);
 }
 
 static int update_mqd(struct mqd_manager *mm, void *mqd,
@@ -245,7 +246,7 @@ static int destroy_mqd(struct mqd_manager *mm, void *mqd,
                         unsigned int timeout, uint32_t pipe_id,
                         uint32_t queue_id)
 {
-        return kfd2kgd->hqd_destroy(mm->dev->kgd, type, timeout,
+        return mm->dev->kfd2kgd->hqd_destroy(mm->dev->kgd, type, timeout,
                                         pipe_id, queue_id);
 }
 
@@ -258,7 +259,7 @@ static int destroy_mqd_sdma(struct mqd_manager *mm, void *mqd,
                                 unsigned int timeout, uint32_t pipe_id,
                                 uint32_t queue_id)
 {
-        return kfd2kgd->hqd_sdma_destroy(mm->dev->kgd, mqd, timeout);
+        return mm->dev->kfd2kgd->hqd_sdma_destroy(mm->dev->kgd, mqd, timeout);
 }
 
 static bool is_occupied(struct mqd_manager *mm, void *mqd,
@@ -266,7 +267,7 @@ static bool is_occupied(struct mqd_manager *mm, void *mqd,
                         uint32_t queue_id)
 {
 
-        return kfd2kgd->hqd_is_occupied(mm->dev->kgd, queue_address,
+        return mm->dev->kfd2kgd->hqd_is_occupied(mm->dev->kgd, queue_address,
                                         pipe_id, queue_id);
 
 }
@@ -275,7 +276,7 @@ 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);
+        return mm->dev->kfd2kgd->hqd_sdma_is_occupied(mm->dev->kgd, mqd);
 }
 
 /*
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index b7bd7afd6fcf..f21fccebd75b 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -148,6 +148,11 @@ struct kfd_dev {
 
         struct kgd2kfd_shared_resources shared_resources;
 
+        const struct kfd2kgd_calls *kfd2kgd;
+        struct mutex doorbell_mutex;
+        unsigned long doorbell_available_index[DIV_ROUND_UP(
+                KFD_MAX_NUM_OF_QUEUES_PER_PROCESS, BITS_PER_LONG)];
+
         void *gtt_mem;
         uint64_t gtt_start_gpu_addr;
         void *gtt_start_cpu_ptr;
@@ -164,13 +169,12 @@ struct kfd_dev {
 
 /* KGD2KFD callbacks */
 void kgd2kfd_exit(void);
-struct kfd_dev *kgd2kfd_probe(struct kgd_dev *kgd, struct pci_dev *pdev);
+struct kfd_dev *kgd2kfd_probe(struct kgd_dev *kgd,
+                        struct pci_dev *pdev, const struct kfd2kgd_calls *f2g);
 bool kgd2kfd_device_init(struct kfd_dev *kfd,
-                         const struct kgd2kfd_shared_resources *gpu_resources);
+                        const struct kgd2kfd_shared_resources *gpu_resources);
 void kgd2kfd_device_exit(struct kfd_dev *kfd);
 
-extern const struct kfd2kgd_calls *kfd2kgd;
-
 enum kfd_mempool {
         KFD_MEMPOOL_SYSTEM_CACHEABLE = 1,
         KFD_MEMPOOL_SYSTEM_WRITECOMBINE = 2,
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
index 498399323a8c..661c6605d31b 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
@@ -726,13 +726,14 @@ static ssize_t node_show(struct kobject *kobj, struct attribute *attr,
                 }
 
                 sysfs_show_32bit_prop(buffer, "max_engine_clk_fcompute",
-                                kfd2kgd->get_max_engine_clock_in_mhz(
+                        dev->gpu->kfd2kgd->get_max_engine_clock_in_mhz(
                                         dev->gpu->kgd));
                 sysfs_show_64bit_prop(buffer, "local_mem_size",
-                                kfd2kgd->get_vmem_size(dev->gpu->kgd));
+                        dev->gpu->kfd2kgd->get_vmem_size(
+                                        dev->gpu->kgd));
 
                 sysfs_show_32bit_prop(buffer, "fw_version",
-                                kfd2kgd->get_fw_version(
+                        dev->gpu->kfd2kgd->get_fw_version(
                                                 dev->gpu->kgd,
                                                 KGD_ENGINE_MEC1));
         }
@@ -1099,8 +1100,9 @@ static uint32_t kfd_generate_gpu_id(struct kfd_dev *gpu)
         buf[2] = gpu->pdev->subsystem_device;
         buf[3] = gpu->pdev->device;
         buf[4] = gpu->pdev->bus->number;
-        buf[5] = (uint32_t)(kfd2kgd->get_vmem_size(gpu->kgd) & 0xffffffff);
-        buf[6] = (uint32_t)(kfd2kgd->get_vmem_size(gpu->kgd) >> 32);
+        buf[5] = (uint32_t)(gpu->kfd2kgd->get_vmem_size(gpu->kgd)
+                        & 0xffffffff);
+        buf[6] = (uint32_t)(gpu->kfd2kgd->get_vmem_size(gpu->kgd) >> 32);
 
         for (i = 0, hashout = 0; i < 7; i++)
                 hashout ^= hash_32(buf[i], KFD_GPU_ID_HASH_WIDTH);