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| author | James Smart <jsmart2021@gmail.com> | 2021-08-16 09:28:54 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-08-24 22:56:34 -0400 |
| commit | 02243836ad6f384284f10302e6b820b893960d1c (patch) | |
| tree | 5f1c8ff2fc5f610fa6dffe84e34533a8a230f2fd /drivers/scsi/lpfc/lpfc_mem.c | |
| parent | daebf93fc3a5d12b3bc928aebb168c68e754dda2 (diff) | |
| download | linux-02243836ad6f384284f10302e6b820b893960d1c.tar.gz linux-02243836ad6f384284f10302e6b820b893960d1c.tar.bz2 linux-02243836ad6f384284f10302e6b820b893960d1c.zip | |
scsi: lpfc: Add support for the CM framework
Complete the enablement of the cm framework feature in the adapter. Perform
the following:
- Detect the presence of the congestion management framework feature.
When the cm framework is present:
- Issue the SET_FEATURE command to enable the feature.
- Register the cm statistics buffer with the adapter.
- Read the cm enablement buffer to determine the cm framework state for cm
management.
When cm management is enabled:
- Monitor all FPIN and congestion signalling events, incrementing
counters.
- Regularly sync with the adapter to communicate congestion events and to
receive an rx request limit.
- Monitor requests for rx data and ensure that no more than the
adapter prescribed limit is issued on the link. If the limit is
exceeded, SCSI and/or NVMe traffic is temporarily suspended.
- Maintain the minute, hourly, daily statistics buffer.
- Monitor for congestion enablement change events, causing a reread of the
enablement buffer and acting on any change in enablement.
And:
- Add teardown logic, including buffer deregistration, on adapter
detachment or reset.
Link: https://lore.kernel.org/r/20210816162901.121235-10-jsmart2021@gmail.com
Co-developed-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: Justin Tee <justin.tee@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/lpfc/lpfc_mem.c')
| -rw-r--r-- | drivers/scsi/lpfc/lpfc_mem.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/scsi/lpfc/lpfc_mem.c b/drivers/scsi/lpfc/lpfc_mem.c index be54fbf5146f..bbb181ab334b 100644 --- a/drivers/scsi/lpfc/lpfc_mem.c +++ b/drivers/scsi/lpfc/lpfc_mem.c @@ -335,6 +335,15 @@ lpfc_mem_free_all(struct lpfc_hba *phba) dma_pool_destroy(phba->lpfc_cmd_rsp_buf_pool); phba->lpfc_cmd_rsp_buf_pool = NULL; + /* Free Congestion Data buffer */ + if (phba->cgn_i) { + dma_free_coherent(&phba->pcidev->dev, + sizeof(struct lpfc_cgn_info), + phba->cgn_i->virt, phba->cgn_i->phys); + kfree(phba->cgn_i); + phba->cgn_i = NULL; + } + /* Free the iocb lookup array */ kfree(psli->iocbq_lookup); psli->iocbq_lookup = NULL; |