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author | Oded Gabbay <oded.gabbay@gmail.com> | 2019-02-16 00:39:17 +0200 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-18 09:46:45 +0100 |
commit | 9494a8dd8d22cbff8ce358aaa223fffe1b070cb0 (patch) | |
tree | 8a7b51e6440aa5248026140fa33d42172dde26de /drivers/misc/habanalabs/device.c | |
parent | habanalabs: add basic Goya h/w initialization (diff) | |
download | linux-dev-9494a8dd8d22cbff8ce358aaa223fffe1b070cb0.tar.xz linux-dev-9494a8dd8d22cbff8ce358aaa223fffe1b070cb0.zip |
habanalabs: add h/w queues module
This patch adds the H/W queues module and the code to initialize Goya's
various compute and DMA engines and their queues.
Goya has 5 DMA channels, 8 TPC engines and a single MME engine. For each
channel/engine, there is a H/W queue logic which is used to pass commands
from the user to the H/W. That logic is called QMAN.
There are two types of QMANs: external and internal. The DMA QMANs are
considered external while the TPC and MME QMANs are considered internal.
For each external queue there is a completion queue, which is located on
the Host memory.
The differences between external and internal QMANs are:
1. The location of the queue's memory. External QMANs are located on the
Host memory while internal QMANs are located on the on-chip memory.
2. The external QMAN write an entry to a completion queue and sends an
MSI-X interrupt upon completion of a command buffer that was given to
it. The internal QMAN doesn't do that.
Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/habanalabs/device.c')
-rw-r--r-- | drivers/misc/habanalabs/device.c | 75 |
1 files changed, 73 insertions, 2 deletions
diff --git a/drivers/misc/habanalabs/device.c b/drivers/misc/habanalabs/device.c index 5eefc2952be5..06e2b7f32499 100644 --- a/drivers/misc/habanalabs/device.c +++ b/drivers/misc/habanalabs/device.c @@ -174,13 +174,23 @@ static int device_early_init(struct hl_device *hdev) if (rc) goto early_fini; + hdev->cq_wq = alloc_workqueue("hl-free-jobs", WQ_UNBOUND, 0); + if (hdev->cq_wq == NULL) { + dev_err(hdev->dev, "Failed to allocate CQ workqueue\n"); + rc = -ENOMEM; + goto asid_fini; + } + hl_cb_mgr_init(&hdev->kernel_cb_mgr); mutex_init(&hdev->fd_open_cnt_lock); + mutex_init(&hdev->send_cpu_message_lock); atomic_set(&hdev->fd_open_cnt, 0); return 0; +asid_fini: + hl_asid_fini(hdev); early_fini: if (hdev->asic_funcs->early_fini) hdev->asic_funcs->early_fini(hdev); @@ -196,9 +206,12 @@ early_fini: */ static void device_early_fini(struct hl_device *hdev) { + mutex_destroy(&hdev->send_cpu_message_lock); hl_cb_mgr_fini(hdev, &hdev->kernel_cb_mgr); + destroy_workqueue(hdev->cq_wq); + hl_asid_fini(hdev); if (hdev->asic_funcs->early_fini) @@ -277,7 +290,7 @@ int hl_device_resume(struct hl_device *hdev) */ int hl_device_init(struct hl_device *hdev, struct class *hclass) { - int rc; + int i, rc, cq_ready_cnt; /* Create device */ rc = device_setup_cdev(hdev, hclass, hdev->id, &hl_ops); @@ -298,11 +311,48 @@ int hl_device_init(struct hl_device *hdev, struct class *hclass) if (rc) goto early_fini; + /* + * Initialize the H/W queues. Must be done before hw_init, because + * there the addresses of the kernel queue are being written to the + * registers of the device + */ + rc = hl_hw_queues_create(hdev); + if (rc) { + dev_err(hdev->dev, "failed to initialize kernel queues\n"); + goto sw_fini; + } + + /* + * Initialize the completion queues. Must be done before hw_init, + * because there the addresses of the completion queues are being + * passed as arguments to request_irq + */ + hdev->completion_queue = + kcalloc(hdev->asic_prop.completion_queues_count, + sizeof(*hdev->completion_queue), GFP_KERNEL); + + if (!hdev->completion_queue) { + dev_err(hdev->dev, "failed to allocate completion queues\n"); + rc = -ENOMEM; + goto hw_queues_destroy; + } + + for (i = 0, cq_ready_cnt = 0; + i < hdev->asic_prop.completion_queues_count; + i++, cq_ready_cnt++) { + rc = hl_cq_init(hdev, &hdev->completion_queue[i], i); + if (rc) { + dev_err(hdev->dev, + "failed to initialize completion queue\n"); + goto cq_fini; + } + } + /* Allocate the kernel context */ hdev->kernel_ctx = kzalloc(sizeof(*hdev->kernel_ctx), GFP_KERNEL); if (!hdev->kernel_ctx) { rc = -ENOMEM; - goto sw_fini; + goto cq_fini; } hdev->user_ctx = NULL; @@ -328,6 +378,14 @@ int hl_device_init(struct hl_device *hdev, struct class *hclass) hdev->disabled = false; + /* Check that the communication with the device is working */ + rc = hdev->asic_funcs->test_queues(hdev); + if (rc) { + dev_err(hdev->dev, "Failed to detect if device is alive\n"); + rc = 0; + goto out_disabled; + } + dev_notice(hdev->dev, "Successfully added device to habanalabs driver\n"); @@ -339,6 +397,12 @@ release_ctx: "kernel ctx is still alive on initialization failure\n"); free_ctx: kfree(hdev->kernel_ctx); +cq_fini: + for (i = 0 ; i < cq_ready_cnt ; i++) + hl_cq_fini(hdev, &hdev->completion_queue[i]); + kfree(hdev->completion_queue); +hw_queues_destroy: + hl_hw_queues_destroy(hdev); sw_fini: hdev->asic_funcs->sw_fini(hdev); early_fini: @@ -368,6 +432,7 @@ out_disabled: */ void hl_device_fini(struct hl_device *hdev) { + int i; dev_info(hdev->dev, "Removing device\n"); /* Mark device as disabled */ @@ -382,6 +447,12 @@ void hl_device_fini(struct hl_device *hdev) /* Reset the H/W. It will be in idle state after this returns */ hdev->asic_funcs->hw_fini(hdev, true); + for (i = 0 ; i < hdev->asic_prop.completion_queues_count ; i++) + hl_cq_fini(hdev, &hdev->completion_queue[i]); + kfree(hdev->completion_queue); + + hl_hw_queues_destroy(hdev); + /* Call ASIC S/W finalize function */ hdev->asic_funcs->sw_fini(hdev); |