lisa/android_kernel_xiaomi_sm8350
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mpt3sas: Build MPI SGL LIST on GEN2 HBAs and IEEE SGL LIST on GEN3 HBAs

Browse Source 
Gen2 HBAs use MPI scatter-gather lists whereas Gen3 HBAs use IEEE
scatter-gather lists. Modify the common code part in such a way that it
will build IEEE SGL tables for Gen3 HBAs and MPI SGL tables for Gen2
HBAs.

Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Sreekanth Reddy 2015-11-11 17:30:24 +05:30 committed by Martin K. Petersen
parent af0094115b
commit 471ef9d4e4
1 changed files with 168 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

181
drivers/scsi/mpt3sas/mpt3sas_base.c
View File

@ -1317,6 +1317,149 @@ _base_build_zero_len_sge_ieee(struct MPT3SAS_ADAPTER *ioc, void *paddr)
_base_add_sg_single_ieee(paddr, sgl_flags, 0, 0, -1);
}
/**
* _base_build_sg_scmd - main sg creation routine
* @ioc: per adapter object
* @scmd: scsi command
* @smid: system request message index
* Context: none.
*
* The main routine that builds scatter gather table from a given
* scsi request sent via the .queuecommand main handler.
*
* Returns 0 success, anything else error
*/
static int
_base_build_sg_scmd(struct MPT3SAS_ADAPTER *ioc,
struct scsi_cmnd *scmd, u16 smid)
{
Mpi2SCSIIORequest_t *mpi_request;
dma_addr_t chain_dma;
struct scatterlist *sg_scmd;
void *sg_local, *chain;
u32 chain_offset;
u32 chain_length;
u32 chain_flags;
int sges_left;
u32 sges_in_segment;
u32 sgl_flags;
u32 sgl_flags_last_element;
u32 sgl_flags_end_buffer;
struct chain_tracker *chain_req;
mpi_request = mpt3sas_base_get_msg_frame(ioc, smid);
/* init scatter gather flags */
sgl_flags = MPI2_SGE_FLAGS_SIMPLE_ELEMENT;
if (scmd->sc_data_direction == DMA_TO_DEVICE)
sgl_flags |= MPI2_SGE_FLAGS_HOST_TO_IOC;
sgl_flags_last_element = (sgl_flags | MPI2_SGE_FLAGS_LAST_ELEMENT)
<< MPI2_SGE_FLAGS_SHIFT;
sgl_flags_end_buffer = (sgl_flags | MPI2_SGE_FLAGS_LAST_ELEMENT |
MPI2_SGE_FLAGS_END_OF_BUFFER | MPI2_SGE_FLAGS_END_OF_LIST)
<< MPI2_SGE_FLAGS_SHIFT;
sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
sg_scmd = scsi_sglist(scmd);
sges_left = scsi_dma_map(scmd);
if (sges_left < 0) {
sdev_printk(KERN_ERR, scmd->device,
"pci_map_sg failed: request for %d bytes!\n",
scsi_bufflen(scmd));
return -ENOMEM;
}
sg_local = &mpi_request->SGL;
sges_in_segment = ioc->max_sges_in_main_message;
if (sges_left <= sges_in_segment)
goto fill_in_last_segment;
mpi_request->ChainOffset = (offsetof(Mpi2SCSIIORequest_t, SGL) +
(sges_in_segment * ioc->sge_size))/4;
/* fill in main message segment when there is a chain following */
while (sges_in_segment) {
if (sges_in_segment == 1)
ioc->base_add_sg_single(sg_local,
sgl_flags_last_element | sg_dma_len(sg_scmd),
sg_dma_address(sg_scmd));
else
ioc->base_add_sg_single(sg_local, sgl_flags |
sg_dma_len(sg_scmd), sg_dma_address(sg_scmd));
sg_scmd = sg_next(sg_scmd);
sg_local += ioc->sge_size;
sges_left--;
sges_in_segment--;
}
/* initializing the chain flags and pointers */
chain_flags = MPI2_SGE_FLAGS_CHAIN_ELEMENT << MPI2_SGE_FLAGS_SHIFT;
chain_req = _base_get_chain_buffer_tracker(ioc, smid);
if (!chain_req)
return -1;
chain = chain_req->chain_buffer;
chain_dma = chain_req->chain_buffer_dma;
do {
sges_in_segment = (sges_left <=
ioc->max_sges_in_chain_message) ? sges_left :
ioc->max_sges_in_chain_message;
chain_offset = (sges_left == sges_in_segment) ?
0 : (sges_in_segment * ioc->sge_size)/4;
chain_length = sges_in_segment * ioc->sge_size;
if (chain_offset) {
chain_offset = chain_offset <<
MPI2_SGE_CHAIN_OFFSET_SHIFT;
chain_length += ioc->sge_size;
}
ioc->base_add_sg_single(sg_local, chain_flags | chain_offset |
chain_length, chain_dma);
sg_local = chain;
if (!chain_offset)
goto fill_in_last_segment;
/* fill in chain segments */
while (sges_in_segment) {
if (sges_in_segment == 1)
ioc->base_add_sg_single(sg_local,
sgl_flags_last_element |
sg_dma_len(sg_scmd),
sg_dma_address(sg_scmd));
else
ioc->base_add_sg_single(sg_local, sgl_flags |
sg_dma_len(sg_scmd),
sg_dma_address(sg_scmd));
sg_scmd = sg_next(sg_scmd);
sg_local += ioc->sge_size;
sges_left--;
sges_in_segment--;
}
chain_req = _base_get_chain_buffer_tracker(ioc, smid);
if (!chain_req)
return -1;
chain = chain_req->chain_buffer;
chain_dma = chain_req->chain_buffer_dma;
} while (1);
fill_in_last_segment:
/* fill the last segment */
while (sges_left) {
if (sges_left == 1)
ioc->base_add_sg_single(sg_local, sgl_flags_end_buffer |
sg_dma_len(sg_scmd), sg_dma_address(sg_scmd));
else
ioc->base_add_sg_single(sg_local, sgl_flags |
sg_dma_len(sg_scmd), sg_dma_address(sg_scmd));
sg_scmd = sg_next(sg_scmd);
sg_local += ioc->sge_size;
sges_left--;
}
return 0;
}
/**
* _base_build_sg_scmd_ieee - main sg creation routine for IEEE format
* @ioc: per adapter object
@ -2850,8 +2993,12 @@ _base_allocate_memory_pools(struct MPT3SAS_ADAPTER *ioc, int sleep_flag)
/* command line tunables for max sgl entries */
if (max_sgl_entries != -1)
sg_tablesize = max_sgl_entries;
else
sg_tablesize = MPT3SAS_SG_DEPTH;
else {
if (ioc->hba_mpi_version_belonged == MPI2_VERSION)
sg_tablesize = MPT2SAS_SG_DEPTH;
else
sg_tablesize = MPT3SAS_SG_DEPTH;
}
if (sg_tablesize < MPT_MIN_PHYS_SEGMENTS)
sg_tablesize = MPT_MIN_PHYS_SEGMENTS;
@ -4878,17 +5025,25 @@ mpt3sas_base_attach(struct MPT3SAS_ADAPTER *ioc)
if (r)
goto out_free_resources;
/*
* In SAS3.0,
* SCSI_IO, SMP_PASSTHRU, SATA_PASSTHRU, Target Assist, and
* Target Status - all require the IEEE formated scatter gather
* elements.
*/
ioc->build_sg_scmd = &_base_build_sg_scmd_ieee;
ioc->build_sg = &_base_build_sg_ieee;
ioc->build_zero_len_sge = &_base_build_zero_len_sge_ieee;
ioc->sge_size_ieee = sizeof(Mpi2IeeeSgeSimple64_t);
switch (ioc->hba_mpi_version_belonged) {
case MPI2_VERSION:
ioc->build_sg_scmd = &_base_build_sg_scmd;
ioc->build_sg = &_base_build_sg;
ioc->build_zero_len_sge = &_base_build_zero_len_sge;
break;
case MPI25_VERSION:
/*
* In SAS3.0,
* SCSI_IO, SMP_PASSTHRU, SATA_PASSTHRU, Target Assist, and
* Target Status - all require the IEEE formated scatter gather
* elements.
*/
ioc->build_sg_scmd = &_base_build_sg_scmd_ieee;
ioc->build_sg = &_base_build_sg_ieee;
ioc->build_zero_len_sge = &_base_build_zero_len_sge_ieee;
ioc->sge_size_ieee = sizeof(Mpi2IeeeSgeSimple64_t);
break;
}
/*
* These function pointers for other requests that don't