[SCSI] mptsas: add SMP passthrough support via bsg
This patch adds support for SAS Management Protocol (SMP) passthrough
support via bsg.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Eric Moore <eric.moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index 29add83..b9c69bf 100644
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -1312,11 +1312,137 @@
return rc;
}
+static int mptsas_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
+ struct request *req)
+{
+ MPT_ADAPTER *ioc = ((MPT_SCSI_HOST *) shost->hostdata)->ioc;
+ MPT_FRAME_HDR *mf;
+ SmpPassthroughRequest_t *smpreq;
+ struct request *rsp = req->next_rq;
+ int ret;
+ int flagsLength;
+ unsigned long timeleft;
+ char *psge;
+ dma_addr_t dma_addr_in = 0;
+ dma_addr_t dma_addr_out = 0;
+ u64 sas_address = 0;
+
+ if (!rsp) {
+ printk(KERN_ERR "%s: the smp response space is missing\n",
+ __FUNCTION__);
+ return -EINVAL;
+ }
+
+ /* do we need to support multiple segments? */
+ if (req->bio->bi_vcnt > 1 || rsp->bio->bi_vcnt > 1) {
+ printk(KERN_ERR "%s: multiple segments req %u %u, rsp %u %u\n",
+ __FUNCTION__, req->bio->bi_vcnt, req->data_len,
+ rsp->bio->bi_vcnt, rsp->data_len);
+ return -EINVAL;
+ }
+
+ ret = mutex_lock_interruptible(&ioc->sas_mgmt.mutex);
+ if (ret)
+ goto out;
+
+ mf = mpt_get_msg_frame(mptsasMgmtCtx, ioc);
+ if (!mf) {
+ ret = -ENOMEM;
+ goto out_unlock;
+ }
+
+ smpreq = (SmpPassthroughRequest_t *)mf;
+ memset(smpreq, 0, sizeof(*smpreq));
+
+ smpreq->RequestDataLength = cpu_to_le16(req->data_len - 4);
+ smpreq->Function = MPI_FUNCTION_SMP_PASSTHROUGH;
+
+ if (rphy)
+ sas_address = rphy->identify.sas_address;
+ else {
+ struct mptsas_portinfo *port_info;
+
+ mutex_lock(&ioc->sas_topology_mutex);
+ port_info = mptsas_find_portinfo_by_handle(ioc, ioc->handle);
+ if (port_info && port_info->phy_info)
+ sas_address =
+ port_info->phy_info[0].phy->identify.sas_address;
+ mutex_unlock(&ioc->sas_topology_mutex);
+ }
+
+ *((u64 *)&smpreq->SASAddress) = cpu_to_le64(sas_address);
+
+ psge = (char *)
+ (((int *) mf) + (offsetof(SmpPassthroughRequest_t, SGL) / 4));
+
+ /* request */
+ flagsLength = (MPI_SGE_FLAGS_SIMPLE_ELEMENT |
+ MPI_SGE_FLAGS_END_OF_BUFFER |
+ MPI_SGE_FLAGS_DIRECTION |
+ mpt_addr_size()) << MPI_SGE_FLAGS_SHIFT;
+ flagsLength |= (req->data_len - 4);
+
+ dma_addr_out = pci_map_single(ioc->pcidev, bio_data(req->bio),
+ req->data_len, PCI_DMA_BIDIRECTIONAL);
+ if (!dma_addr_out)
+ goto put_mf;
+ mpt_add_sge(psge, flagsLength, dma_addr_out);
+ psge += (sizeof(u32) + sizeof(dma_addr_t));
+
+ /* response */
+ flagsLength = MPT_SGE_FLAGS_SSIMPLE_READ;
+ flagsLength |= rsp->data_len + 4;
+ dma_addr_in = pci_map_single(ioc->pcidev, bio_data(rsp->bio),
+ rsp->data_len, PCI_DMA_BIDIRECTIONAL);
+ if (!dma_addr_in)
+ goto unmap;
+ mpt_add_sge(psge, flagsLength, dma_addr_in);
+
+ mpt_put_msg_frame(mptsasMgmtCtx, ioc, mf);
+
+ timeleft = wait_for_completion_timeout(&ioc->sas_mgmt.done, 10 * HZ);
+ if (!timeleft) {
+ printk(KERN_ERR "%s: smp timeout!\n", __FUNCTION__);
+ /* On timeout reset the board */
+ mpt_HardResetHandler(ioc, CAN_SLEEP);
+ ret = -ETIMEDOUT;
+ goto unmap;
+ }
+ mf = NULL;
+
+ if (ioc->sas_mgmt.status & MPT_IOCTL_STATUS_RF_VALID) {
+ SmpPassthroughReply_t *smprep;
+
+ smprep = (SmpPassthroughReply_t *)ioc->sas_mgmt.reply;
+ memcpy(req->sense, smprep, sizeof(*smprep));
+ req->sense_len = sizeof(*smprep);
+ } else {
+ printk(KERN_ERR "%s: smp passthru reply failed to be returned\n",
+ __FUNCTION__);
+ ret = -ENXIO;
+ }
+unmap:
+ if (dma_addr_out)
+ pci_unmap_single(ioc->pcidev, dma_addr_out, req->data_len,
+ PCI_DMA_BIDIRECTIONAL);
+ if (dma_addr_in)
+ pci_unmap_single(ioc->pcidev, dma_addr_in, rsp->data_len,
+ PCI_DMA_BIDIRECTIONAL);
+put_mf:
+ if (mf)
+ mpt_free_msg_frame(ioc, mf);
+out_unlock:
+ mutex_unlock(&ioc->sas_mgmt.mutex);
+out:
+ return ret;
+}
+
static struct sas_function_template mptsas_transport_functions = {
.get_linkerrors = mptsas_get_linkerrors,
.get_enclosure_identifier = mptsas_get_enclosure_identifier,
.get_bay_identifier = mptsas_get_bay_identifier,
.phy_reset = mptsas_phy_reset,
+ .smp_handler = mptsas_smp_handler,
};
static struct scsi_transport_template *mptsas_transport_template;