diff options
author | Oded Gabbay <oded.gabbay@gmail.com> | 2019-02-16 01:39:17 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-18 11:46:45 +0300 |
commit | 9494a8dd8d22cbff8ce358aaa223fffe1b070cb0 (patch) | |
tree | 8a7b51e6440aa5248026140fa33d42172dde26de /drivers/misc/habanalabs/habanalabs_drv.c | |
parent | 839c48030d27a690cc85f0762f9f6f07a3349fb3 (diff) | |
download | linux-9494a8dd8d22cbff8ce358aaa223fffe1b070cb0.tar.xz |
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/habanalabs_drv.c')
-rw-r--r-- | drivers/misc/habanalabs/habanalabs_drv.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/misc/habanalabs/habanalabs_drv.c b/drivers/misc/habanalabs/habanalabs_drv.c index 59c2fd196659..93576249307b 100644 --- a/drivers/misc/habanalabs/habanalabs_drv.c +++ b/drivers/misc/habanalabs/habanalabs_drv.c @@ -169,6 +169,7 @@ int create_hdev(struct hl_device **dev, struct pci_dev *pdev, /* Parameters for bring-up - set them to defaults */ hdev->cpu_enable = 1; hdev->reset_pcilink = 0; + hdev->cpu_queues_enable = 1; hdev->fw_loading = 1; hdev->pldm = 0; @@ -176,6 +177,10 @@ int create_hdev(struct hl_device **dev, struct pci_dev *pdev, if (!hdev->cpu_enable) hdev->fw_loading = 0; + /* If we don't load FW, no need to initialize CPU queues */ + if (!hdev->fw_loading) + hdev->cpu_queues_enable = 0; + hdev->disabled = true; hdev->pdev = pdev; /* can be NULL in case of simulator device */ |