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>

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 */