diff options
| author | Chandrakanth patil <chandrakanth.patil@broadcom.com> | 2023-12-06 00:46:27 +0530 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2023-12-05 21:45:53 -0500 |
| commit | c432e167523939e64ff882c86cdbf28e279a56ab (patch) | |
| tree | fcb9e9808e535d727ed7266688246dfe6ede9d97 /drivers/scsi/mpi3mr/mpi3mr.h | |
| parent | 07ac6adda4d3daa9410d716e96ffaa3192b6ac04 (diff) | |
scsi: mpi3mr: Support for preallocation of SGL BSG data buffers part-1
The driver now supports SGLs for BSG data transfer. Upon loading, the
driver pre-allocates SGLs in chunks of 8k, results in a total of 256 * 8k,
equal to 2MB. These pre-allocated SGLs are reserved for handling BSG
commands and are deallocated during driver unload.
Co-developed-by: Sathya Prakash <sathya.prakash@broadcom.com>
Signed-off-by: Sathya Prakash <sathya.prakash@broadcom.com>
Signed-off-by: Chandrakanth patil <chandrakanth.patil@broadcom.com>
Link: https://lore.kernel.org/r/20231205191630.12201-2-chandrakanth.patil@broadcom.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/mpi3mr/mpi3mr.h')
| -rw-r--r-- | drivers/scsi/mpi3mr/mpi3mr.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/scsi/mpi3mr/mpi3mr.h b/drivers/scsi/mpi3mr/mpi3mr.h index 4f49f8396309..8fce57894f8f 100644 --- a/drivers/scsi/mpi3mr/mpi3mr.h +++ b/drivers/scsi/mpi3mr/mpi3mr.h @@ -477,6 +477,10 @@ struct mpi3mr_throttle_group_info { /* HBA port flags */ #define MPI3MR_HBA_PORT_FLAG_DIRTY 0x01 +/* IOCTL data transfer sge*/ +#define MPI3MR_NUM_IOCTL_SGE 256 +#define MPI3MR_IOCTL_SGE_SIZE (8 * 1024) + /** * struct mpi3mr_hba_port - HBA's port information * @port_id: Port number @@ -1042,6 +1046,11 @@ struct scmd_priv { * @sas_node_lock: Lock to protect SAS node list * @hba_port_table_list: List of HBA Ports * @enclosure_list: List of Enclosure objects + * @ioctl_dma_pool: DMA pool for IOCTL data buffers + * @ioctl_sge: DMA buffer descriptors for IOCTL data + * @ioctl_chain_sge: DMA buffer descriptor for IOCTL chain + * @ioctl_resp_sge: DMA buffer descriptor for Mgmt cmd response + * @ioctl_sges_allocated: Flag for IOCTL SGEs allocated or not */ struct mpi3mr_ioc { struct list_head list; @@ -1227,6 +1236,12 @@ struct mpi3mr_ioc { spinlock_t sas_node_lock; struct list_head hba_port_table_list; struct list_head enclosure_list; + + struct dma_pool *ioctl_dma_pool; + struct dma_memory_desc ioctl_sge[MPI3MR_NUM_IOCTL_SGE]; + struct dma_memory_desc ioctl_chain_sge; + struct dma_memory_desc ioctl_resp_sge; + bool ioctl_sges_allocated; }; /** |