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path: root/drivers/scsi/mpt2sas/mpt2sas_transport.c
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Diffstat (limited to 'drivers/scsi/mpt2sas/mpt2sas_transport.c')
-rw-r--r--drivers/scsi/mpt2sas/mpt2sas_transport.c133
1 files changed, 104 insertions, 29 deletions
diff --git a/drivers/scsi/mpt2sas/mpt2sas_transport.c b/drivers/scsi/mpt2sas/mpt2sas_transport.c
index 831047466a5a..8b2a3db9ea69 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_transport.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_transport.c
@@ -1828,7 +1828,7 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
Mpi2SmpPassthroughRequest_t *mpi_request;
Mpi2SmpPassthroughReply_t *mpi_reply;
- int rc;
+ int rc, i;
u16 smid;
u32 ioc_state;
unsigned long timeleft;
@@ -1837,24 +1837,20 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
u8 issue_reset = 0;
dma_addr_t dma_addr_in = 0;
dma_addr_t dma_addr_out = 0;
+ dma_addr_t pci_dma_in = 0;
+ dma_addr_t pci_dma_out = 0;
+ void *pci_addr_in = NULL;
+ void *pci_addr_out = NULL;
u16 wait_state_count;
struct request *rsp = req->next_rq;
+ struct bio_vec *bvec = NULL;
if (!rsp) {
printk(MPT2SAS_ERR_FMT "%s: the smp response space is "
"missing\n", ioc->name, __func__);
return -EINVAL;
}
-
- /* do we need to support multiple segments? */
- if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) {
- printk(MPT2SAS_ERR_FMT "%s: multiple segments req %u %u, "
- "rsp %u %u\n", ioc->name, __func__, req->bio->bi_vcnt,
- blk_rq_bytes(req), rsp->bio->bi_vcnt, blk_rq_bytes(rsp));
- return -EINVAL;
- }
-
- if (ioc->shost_recovery) {
+ if (ioc->shost_recovery || ioc->pci_error_recovery) {
printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
__func__, ioc->name);
return -EFAULT;
@@ -1872,6 +1868,59 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
}
ioc->transport_cmds.status = MPT2_CMD_PENDING;
+ /* Check if the request is split across multiple segments */
+ if (req->bio->bi_vcnt > 1) {
+ u32 offset = 0;
+
+ /* Allocate memory and copy the request */
+ pci_addr_out = pci_alloc_consistent(ioc->pdev,
+ blk_rq_bytes(req), &pci_dma_out);
+ if (!pci_addr_out) {
+ printk(MPT2SAS_INFO_FMT "%s(): PCI Addr out = NULL\n",
+ ioc->name, __func__);
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ bio_for_each_segment(bvec, req->bio, i) {
+ memcpy(pci_addr_out + offset,
+ page_address(bvec->bv_page) + bvec->bv_offset,
+ bvec->bv_len);
+ offset += bvec->bv_len;
+ }
+ } else {
+ dma_addr_out = pci_map_single(ioc->pdev, bio_data(req->bio),
+ blk_rq_bytes(req), PCI_DMA_BIDIRECTIONAL);
+ if (!dma_addr_out) {
+ printk(MPT2SAS_INFO_FMT "%s(): DMA Addr out = NULL\n",
+ ioc->name, __func__);
+ rc = -ENOMEM;
+ goto free_pci;
+ }
+ }
+
+ /* Check if the response needs to be populated across
+ * multiple segments */
+ if (rsp->bio->bi_vcnt > 1) {
+ pci_addr_in = pci_alloc_consistent(ioc->pdev, blk_rq_bytes(rsp),
+ &pci_dma_in);
+ if (!pci_addr_in) {
+ printk(MPT2SAS_INFO_FMT "%s(): PCI Addr in = NULL\n",
+ ioc->name, __func__);
+ rc = -ENOMEM;
+ goto unmap;
+ }
+ } else {
+ dma_addr_in = pci_map_single(ioc->pdev, bio_data(rsp->bio),
+ blk_rq_bytes(rsp), PCI_DMA_BIDIRECTIONAL);
+ if (!dma_addr_in) {
+ printk(MPT2SAS_INFO_FMT "%s(): DMA Addr in = NULL\n",
+ ioc->name, __func__);
+ rc = -ENOMEM;
+ goto unmap;
+ }
+ }
+
wait_state_count = 0;
ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
while (ioc_state != MPI2_IOC_STATE_OPERATIONAL) {
@@ -1880,7 +1929,7 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
"%s: failed due to ioc not operational\n",
ioc->name, __func__);
rc = -EFAULT;
- goto out;
+ goto unmap;
}
ssleep(1);
ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
@@ -1897,7 +1946,7 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
ioc->name, __func__);
rc = -EAGAIN;
- goto out;
+ goto unmap;
}
rc = 0;
@@ -1919,16 +1968,14 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
sgl_flags = (MPI2_SGE_FLAGS_SIMPLE_ELEMENT |
MPI2_SGE_FLAGS_END_OF_BUFFER | MPI2_SGE_FLAGS_HOST_TO_IOC);
sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
- dma_addr_out = pci_map_single(ioc->pdev, bio_data(req->bio),
- blk_rq_bytes(req), PCI_DMA_BIDIRECTIONAL);
- if (!dma_addr_out) {
- mpt2sas_base_free_smid(ioc, smid);
- goto unmap;
+ if (req->bio->bi_vcnt > 1) {
+ ioc->base_add_sg_single(psge, sgl_flags |
+ (blk_rq_bytes(req) - 4), pci_dma_out);
+ } else {
+ ioc->base_add_sg_single(psge, sgl_flags |
+ (blk_rq_bytes(req) - 4), dma_addr_out);
}
- ioc->base_add_sg_single(psge, sgl_flags | (blk_rq_bytes(req) - 4),
- dma_addr_out);
-
/* incr sgel */
psge += ioc->sge_size;
@@ -1937,16 +1984,14 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
MPI2_SGE_FLAGS_LAST_ELEMENT | MPI2_SGE_FLAGS_END_OF_BUFFER |
MPI2_SGE_FLAGS_END_OF_LIST);
sgl_flags = sgl_flags << MPI2_SGE_FLAGS_SHIFT;
- dma_addr_in = pci_map_single(ioc->pdev, bio_data(rsp->bio),
- blk_rq_bytes(rsp), PCI_DMA_BIDIRECTIONAL);
- if (!dma_addr_in) {
- mpt2sas_base_free_smid(ioc, smid);
- goto unmap;
+ if (rsp->bio->bi_vcnt > 1) {
+ ioc->base_add_sg_single(psge, sgl_flags |
+ (blk_rq_bytes(rsp) + 4), pci_dma_in);
+ } else {
+ ioc->base_add_sg_single(psge, sgl_flags |
+ (blk_rq_bytes(rsp) + 4), dma_addr_in);
}
- ioc->base_add_sg_single(psge, sgl_flags | (blk_rq_bytes(rsp) + 4),
- dma_addr_in);
-
dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT "%s - "
"sending smp request\n", ioc->name, __func__));
@@ -1982,6 +2027,27 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
req->resid_len = 0;
rsp->resid_len -=
le16_to_cpu(mpi_reply->ResponseDataLength);
+ /* check if the resp needs to be copied from the allocated
+ * pci mem */
+ if (rsp->bio->bi_vcnt > 1) {
+ u32 offset = 0;
+ u32 bytes_to_copy =
+ le16_to_cpu(mpi_reply->ResponseDataLength);
+ bio_for_each_segment(bvec, rsp->bio, i) {
+ if (bytes_to_copy <= bvec->bv_len) {
+ memcpy(page_address(bvec->bv_page) +
+ bvec->bv_offset, pci_addr_in +
+ offset, bytes_to_copy);
+ break;
+ } else {
+ memcpy(page_address(bvec->bv_page) +
+ bvec->bv_offset, pci_addr_in +
+ offset, bvec->bv_len);
+ bytes_to_copy -= bvec->bv_len;
+ }
+ offset += bvec->bv_len;
+ }
+ }
} else {
dtransportprintk(ioc, printk(MPT2SAS_INFO_FMT
"%s - no reply\n", ioc->name, __func__));
@@ -2003,6 +2069,15 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
pci_unmap_single(ioc->pdev, dma_addr_in, blk_rq_bytes(rsp),
PCI_DMA_BIDIRECTIONAL);
+ free_pci:
+ if (pci_addr_out)
+ pci_free_consistent(ioc->pdev, blk_rq_bytes(req), pci_addr_out,
+ pci_dma_out);
+
+ if (pci_addr_in)
+ pci_free_consistent(ioc->pdev, blk_rq_bytes(rsp), pci_addr_in,
+ pci_dma_in);
+
out:
ioc->transport_cmds.status = MPT2_CMD_NOT_USED;
mutex_unlock(&ioc->transport_cmds.mutex);
generated by cgit v1.2.3 (git 2.0.4) at 2024-10-07 19:42:15 +0000