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path: root/drivers/scsi/ibmvscsi/ibmvscsi.c
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Diffstat (limited to 'drivers/scsi/ibmvscsi/ibmvscsi.c')
-rw-r--r--drivers/scsi/ibmvscsi/ibmvscsi.c200
1 files changed, 151 insertions, 49 deletions
diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c
index fe09d145542a..822b9fa706f3 100644
--- a/drivers/scsi/ibmvscsi/ibmvscsi.c
+++ b/drivers/scsi/ibmvscsi/ibmvscsi.c
@@ -87,7 +87,7 @@ static int max_channel = 3;
static int init_timeout = 5;
static int max_requests = 50;
-#define IBMVSCSI_VERSION "1.5.6"
+#define IBMVSCSI_VERSION "1.5.7"
MODULE_DESCRIPTION("IBM Virtual SCSI");
MODULE_AUTHOR("Dave Boutcher");
@@ -145,6 +145,8 @@ static int initialize_event_pool(struct event_pool *pool,
sizeof(*evt->xfer_iu) * i;
evt->xfer_iu = pool->iu_storage + i;
evt->hostdata = hostdata;
+ evt->ext_list = NULL;
+ evt->ext_list_token = 0;
}
return 0;
@@ -161,9 +163,16 @@ static void release_event_pool(struct event_pool *pool,
struct ibmvscsi_host_data *hostdata)
{
int i, in_use = 0;
- for (i = 0; i < pool->size; ++i)
+ for (i = 0; i < pool->size; ++i) {
if (atomic_read(&pool->events[i].free) != 1)
++in_use;
+ if (pool->events[i].ext_list) {
+ dma_free_coherent(hostdata->dev,
+ SG_ALL * sizeof(struct memory_descriptor),
+ pool->events[i].ext_list,
+ pool->events[i].ext_list_token);
+ }
+ }
if (in_use)
printk(KERN_WARNING
"ibmvscsi: releasing event pool with %d "
@@ -286,24 +295,41 @@ static void set_srp_direction(struct scsi_cmnd *cmd,
} else {
if (cmd->sc_data_direction == DMA_TO_DEVICE) {
srp_cmd->data_out_format = SRP_INDIRECT_BUFFER;
- srp_cmd->data_out_count = numbuf;
+ srp_cmd->data_out_count =
+ numbuf < MAX_INDIRECT_BUFS ?
+ numbuf: MAX_INDIRECT_BUFS;
} else {
srp_cmd->data_in_format = SRP_INDIRECT_BUFFER;
- srp_cmd->data_in_count = numbuf;
+ srp_cmd->data_in_count =
+ numbuf < MAX_INDIRECT_BUFS ?
+ numbuf: MAX_INDIRECT_BUFS;
}
}
}
+static void unmap_sg_list(int num_entries,
+ struct device *dev,
+ struct memory_descriptor *md)
+{
+ int i;
+
+ for (i = 0; i < num_entries; ++i) {
+ dma_unmap_single(dev,
+ md[i].virtual_address,
+ md[i].length, DMA_BIDIRECTIONAL);
+ }
+}
+
/**
* unmap_cmd_data: - Unmap data pointed in srp_cmd based on the format
* @cmd: srp_cmd whose additional_data member will be unmapped
* @dev: device for which the memory is mapped
*
*/
-static void unmap_cmd_data(struct srp_cmd *cmd, struct device *dev)
+static void unmap_cmd_data(struct srp_cmd *cmd,
+ struct srp_event_struct *evt_struct,
+ struct device *dev)
{
- int i;
-
if ((cmd->data_out_format == SRP_NO_BUFFER) &&
(cmd->data_in_format == SRP_NO_BUFFER))
return;
@@ -318,15 +344,34 @@ static void unmap_cmd_data(struct srp_cmd *cmd, struct device *dev)
(struct indirect_descriptor *)cmd->additional_data;
int num_mapped = indirect->head.length /
sizeof(indirect->list[0]);
- for (i = 0; i < num_mapped; ++i) {
- struct memory_descriptor *data = &indirect->list[i];
- dma_unmap_single(dev,
- data->virtual_address,
- data->length, DMA_BIDIRECTIONAL);
+
+ if (num_mapped <= MAX_INDIRECT_BUFS) {
+ unmap_sg_list(num_mapped, dev, &indirect->list[0]);
+ return;
}
+
+ unmap_sg_list(num_mapped, dev, evt_struct->ext_list);
}
}
+static int map_sg_list(int num_entries,
+ struct scatterlist *sg,
+ struct memory_descriptor *md)
+{
+ int i;
+ u64 total_length = 0;
+
+ for (i = 0; i < num_entries; ++i) {
+ struct memory_descriptor *descr = md + i;
+ struct scatterlist *sg_entry = &sg[i];
+ descr->virtual_address = sg_dma_address(sg_entry);
+ descr->length = sg_dma_len(sg_entry);
+ descr->memory_handle = 0;
+ total_length += sg_dma_len(sg_entry);
+ }
+ return total_length;
+}
+
/**
* map_sg_data: - Maps dma for a scatterlist and initializes decriptor fields
* @cmd: Scsi_Cmnd with the scatterlist
@@ -337,10 +382,11 @@ static void unmap_cmd_data(struct srp_cmd *cmd, struct device *dev)
* Returns 1 on success.
*/
static int map_sg_data(struct scsi_cmnd *cmd,
+ struct srp_event_struct *evt_struct,
struct srp_cmd *srp_cmd, struct device *dev)
{
- int i, sg_mapped;
+ int sg_mapped;
u64 total_length = 0;
struct scatterlist *sg = cmd->request_buffer;
struct memory_descriptor *data =
@@ -363,27 +409,46 @@ static int map_sg_data(struct scsi_cmnd *cmd,
return 1;
}
- if (sg_mapped > MAX_INDIRECT_BUFS) {
+ if (sg_mapped > SG_ALL) {
printk(KERN_ERR
"ibmvscsi: More than %d mapped sg entries, got %d\n",
- MAX_INDIRECT_BUFS, sg_mapped);
+ SG_ALL, sg_mapped);
return 0;
}
indirect->head.virtual_address = 0;
indirect->head.length = sg_mapped * sizeof(indirect->list[0]);
indirect->head.memory_handle = 0;
- for (i = 0; i < sg_mapped; ++i) {
- struct memory_descriptor *descr = &indirect->list[i];
- struct scatterlist *sg_entry = &sg[i];
- descr->virtual_address = sg_dma_address(sg_entry);
- descr->length = sg_dma_len(sg_entry);
- descr->memory_handle = 0;
- total_length += sg_dma_len(sg_entry);
+
+ if (sg_mapped <= MAX_INDIRECT_BUFS) {
+ total_length = map_sg_list(sg_mapped, sg, &indirect->list[0]);
+ indirect->total_length = total_length;
+ return 1;
}
- indirect->total_length = total_length;
- return 1;
+ /* get indirect table */
+ if (!evt_struct->ext_list) {
+ evt_struct->ext_list =(struct memory_descriptor*)
+ dma_alloc_coherent(dev,
+ SG_ALL * sizeof(struct memory_descriptor),
+ &evt_struct->ext_list_token, 0);
+ if (!evt_struct->ext_list) {
+ printk(KERN_ERR
+ "ibmvscsi: Can't allocate memory for indirect table\n");
+ return 0;
+
+ }
+ }
+
+ total_length = map_sg_list(sg_mapped, sg, evt_struct->ext_list);
+
+ indirect->total_length = total_length;
+ indirect->head.virtual_address = evt_struct->ext_list_token;
+ indirect->head.length = sg_mapped * sizeof(indirect->list[0]);
+ memcpy(indirect->list, evt_struct->ext_list,
+ MAX_INDIRECT_BUFS * sizeof(struct memory_descriptor));
+
+ return 1;
}
/**
@@ -428,6 +493,7 @@ static int map_single_data(struct scsi_cmnd *cmd,
* Returns 1 on success.
*/
static int map_data_for_srp_cmd(struct scsi_cmnd *cmd,
+ struct srp_event_struct *evt_struct,
struct srp_cmd *srp_cmd, struct device *dev)
{
switch (cmd->sc_data_direction) {
@@ -450,7 +516,7 @@ static int map_data_for_srp_cmd(struct scsi_cmnd *cmd,
if (!cmd->request_buffer)
return 1;
if (cmd->use_sg)
- return map_sg_data(cmd, srp_cmd, dev);
+ return map_sg_data(cmd, evt_struct, srp_cmd, dev);
return map_single_data(cmd, srp_cmd, dev);
}
@@ -486,6 +552,7 @@ static int ibmvscsi_send_srp_event(struct srp_event_struct *evt_struct,
printk(KERN_WARNING
"ibmvscsi: Warning, request_limit exceeded\n");
unmap_cmd_data(&evt_struct->iu.srp.cmd,
+ evt_struct,
hostdata->dev);
free_event_struct(&hostdata->pool, evt_struct);
return SCSI_MLQUEUE_HOST_BUSY;
@@ -513,7 +580,7 @@ static int ibmvscsi_send_srp_event(struct srp_event_struct *evt_struct,
return 0;
send_error:
- unmap_cmd_data(&evt_struct->iu.srp.cmd, hostdata->dev);
+ unmap_cmd_data(&evt_struct->iu.srp.cmd, evt_struct, hostdata->dev);
if ((cmnd = evt_struct->cmnd) != NULL) {
cmnd->result = DID_ERROR << 16;
@@ -551,6 +618,7 @@ static void handle_cmd_rsp(struct srp_event_struct *evt_struct)
rsp->sense_and_response_data,
rsp->sense_data_list_length);
unmap_cmd_data(&evt_struct->iu.srp.cmd,
+ evt_struct,
evt_struct->hostdata->dev);
if (rsp->doover)
@@ -583,6 +651,7 @@ static int ibmvscsi_queuecommand(struct scsi_cmnd *cmnd,
{
struct srp_cmd *srp_cmd;
struct srp_event_struct *evt_struct;
+ struct indirect_descriptor *indirect;
struct ibmvscsi_host_data *hostdata =
(struct ibmvscsi_host_data *)&cmnd->device->host->hostdata;
u16 lun = lun_from_dev(cmnd->device);
@@ -591,14 +660,6 @@ static int ibmvscsi_queuecommand(struct scsi_cmnd *cmnd,
if (!evt_struct)
return SCSI_MLQUEUE_HOST_BUSY;
- init_event_struct(evt_struct,
- handle_cmd_rsp,
- VIOSRP_SRP_FORMAT,
- cmnd->timeout);
-
- evt_struct->cmnd = cmnd;
- evt_struct->cmnd_done = done;
-
/* Set up the actual SRP IU */
srp_cmd = &evt_struct->iu.srp.cmd;
memset(srp_cmd, 0x00, sizeof(*srp_cmd));
@@ -606,17 +667,25 @@ static int ibmvscsi_queuecommand(struct scsi_cmnd *cmnd,
memcpy(srp_cmd->cdb, cmnd->cmnd, sizeof(cmnd->cmnd));
srp_cmd->lun = ((u64) lun) << 48;
- if (!map_data_for_srp_cmd(cmnd, srp_cmd, hostdata->dev)) {
+ if (!map_data_for_srp_cmd(cmnd, evt_struct, srp_cmd, hostdata->dev)) {
printk(KERN_ERR "ibmvscsi: couldn't convert cmd to srp_cmd\n");
free_event_struct(&hostdata->pool, evt_struct);
return SCSI_MLQUEUE_HOST_BUSY;
}
+ init_event_struct(evt_struct,
+ handle_cmd_rsp,
+ VIOSRP_SRP_FORMAT,
+ cmnd->timeout_per_command/HZ);
+
+ evt_struct->cmnd = cmnd;
+ evt_struct->cmnd_done = done;
+
/* Fix up dma address of the buffer itself */
- if ((srp_cmd->data_out_format == SRP_INDIRECT_BUFFER) ||
- (srp_cmd->data_in_format == SRP_INDIRECT_BUFFER)) {
- struct indirect_descriptor *indirect =
- (struct indirect_descriptor *)srp_cmd->additional_data;
+ indirect = (struct indirect_descriptor *)srp_cmd->additional_data;
+ if (((srp_cmd->data_out_format == SRP_INDIRECT_BUFFER) ||
+ (srp_cmd->data_in_format == SRP_INDIRECT_BUFFER)) &&
+ (indirect->head.virtual_address == 0)) {
indirect->head.virtual_address = evt_struct->crq.IU_data_ptr +
offsetof(struct srp_cmd, additional_data) +
offsetof(struct indirect_descriptor, list);
@@ -658,6 +727,16 @@ static void adapter_info_rsp(struct srp_event_struct *evt_struct)
if (hostdata->madapter_info.port_max_txu[0])
hostdata->host->max_sectors =
hostdata->madapter_info.port_max_txu[0] >> 9;
+
+ if (hostdata->madapter_info.os_type == 3 &&
+ strcmp(hostdata->madapter_info.srp_version, "1.6a") <= 0) {
+ printk("ibmvscsi: host (Ver. %s) doesn't support large"
+ "transfers\n",
+ hostdata->madapter_info.srp_version);
+ printk("ibmvscsi: limiting scatterlists to %d\n",
+ MAX_INDIRECT_BUFS);
+ hostdata->host->sg_tablesize = MAX_INDIRECT_BUFS;
+ }
}
}
@@ -826,11 +905,13 @@ static int ibmvscsi_eh_abort_handler(struct scsi_cmnd *cmd)
struct srp_event_struct *tmp_evt, *found_evt;
union viosrp_iu srp_rsp;
int rsp_rc;
+ unsigned long flags;
u16 lun = lun_from_dev(cmd->device);
/* First, find this command in our sent list so we can figure
* out the correct tag
*/
+ spin_lock_irqsave(hostdata->host->host_lock, flags);
found_evt = NULL;
list_for_each_entry(tmp_evt, &hostdata->sent, list) {
if (tmp_evt->cmnd == cmd) {
@@ -839,11 +920,14 @@ static int ibmvscsi_eh_abort_handler(struct scsi_cmnd *cmd)
}
}
- if (!found_evt)
+ if (!found_evt) {
+ spin_unlock_irqrestore(hostdata->host->host_lock, flags);
return FAILED;
+ }
evt = get_event_struct(&hostdata->pool);
if (evt == NULL) {
+ spin_unlock_irqrestore(hostdata->host->host_lock, flags);
printk(KERN_ERR "ibmvscsi: failed to allocate abort event\n");
return FAILED;
}
@@ -867,7 +951,9 @@ static int ibmvscsi_eh_abort_handler(struct scsi_cmnd *cmd)
evt->sync_srp = &srp_rsp;
init_completion(&evt->comp);
- if (ibmvscsi_send_srp_event(evt, hostdata) != 0) {
+ rsp_rc = ibmvscsi_send_srp_event(evt, hostdata);
+ spin_unlock_irqrestore(hostdata->host->host_lock, flags);
+ if (rsp_rc != 0) {
printk(KERN_ERR "ibmvscsi: failed to send abort() event\n");
return FAILED;
}
@@ -901,6 +987,7 @@ static int ibmvscsi_eh_abort_handler(struct scsi_cmnd *cmd)
* The event is no longer in our list. Make sure it didn't
* complete while we were aborting
*/
+ spin_lock_irqsave(hostdata->host->host_lock, flags);
found_evt = NULL;
list_for_each_entry(tmp_evt, &hostdata->sent, list) {
if (tmp_evt->cmnd == cmd) {
@@ -910,6 +997,7 @@ static int ibmvscsi_eh_abort_handler(struct scsi_cmnd *cmd)
}
if (found_evt == NULL) {
+ spin_unlock_irqrestore(hostdata->host->host_lock, flags);
printk(KERN_INFO
"ibmvscsi: aborted task tag 0x%lx completed\n",
tsk_mgmt->managed_task_tag);
@@ -922,8 +1010,10 @@ static int ibmvscsi_eh_abort_handler(struct scsi_cmnd *cmd)
cmd->result = (DID_ABORT << 16);
list_del(&found_evt->list);
- unmap_cmd_data(&found_evt->iu.srp.cmd, found_evt->hostdata->dev);
+ unmap_cmd_data(&found_evt->iu.srp.cmd, found_evt,
+ found_evt->hostdata->dev);
free_event_struct(&found_evt->hostdata->pool, found_evt);
+ spin_unlock_irqrestore(hostdata->host->host_lock, flags);
atomic_inc(&hostdata->request_limit);
return SUCCESS;
}
@@ -943,10 +1033,13 @@ static int ibmvscsi_eh_device_reset_handler(struct scsi_cmnd *cmd)
struct srp_event_struct *tmp_evt, *pos;
union viosrp_iu srp_rsp;
int rsp_rc;
+ unsigned long flags;
u16 lun = lun_from_dev(cmd->device);
+ spin_lock_irqsave(hostdata->host->host_lock, flags);
evt = get_event_struct(&hostdata->pool);
if (evt == NULL) {
+ spin_unlock_irqrestore(hostdata->host->host_lock, flags);
printk(KERN_ERR "ibmvscsi: failed to allocate reset event\n");
return FAILED;
}
@@ -969,7 +1062,9 @@ static int ibmvscsi_eh_device_reset_handler(struct scsi_cmnd *cmd)
evt->sync_srp = &srp_rsp;
init_completion(&evt->comp);
- if (ibmvscsi_send_srp_event(evt, hostdata) != 0) {
+ rsp_rc = ibmvscsi_send_srp_event(evt, hostdata);
+ spin_unlock_irqrestore(hostdata->host->host_lock, flags);
+ if (rsp_rc != 0) {
printk(KERN_ERR "ibmvscsi: failed to send reset event\n");
return FAILED;
}
@@ -1002,12 +1097,14 @@ static int ibmvscsi_eh_device_reset_handler(struct scsi_cmnd *cmd)
/* We need to find all commands for this LUN that have not yet been
* responded to, and fail them with DID_RESET
*/
+ spin_lock_irqsave(hostdata->host->host_lock, flags);
list_for_each_entry_safe(tmp_evt, pos, &hostdata->sent, list) {
if ((tmp_evt->cmnd) && (tmp_evt->cmnd->device == cmd->device)) {
if (tmp_evt->cmnd)
tmp_evt->cmnd->result = (DID_RESET << 16);
list_del(&tmp_evt->list);
- unmap_cmd_data(&tmp_evt->iu.srp.cmd, tmp_evt->hostdata->dev);
+ unmap_cmd_data(&tmp_evt->iu.srp.cmd, tmp_evt,
+ tmp_evt->hostdata->dev);
free_event_struct(&tmp_evt->hostdata->pool,
tmp_evt);
atomic_inc(&hostdata->request_limit);
@@ -1017,6 +1114,7 @@ static int ibmvscsi_eh_device_reset_handler(struct scsi_cmnd *cmd)
tmp_evt->done(tmp_evt);
}
}
+ spin_unlock_irqrestore(hostdata->host->host_lock, flags);
return SUCCESS;
}
@@ -1035,6 +1133,7 @@ static void purge_requests(struct ibmvscsi_host_data *hostdata)
if (tmp_evt->cmnd) {
tmp_evt->cmnd->result = (DID_ERROR << 16);
unmap_cmd_data(&tmp_evt->iu.srp.cmd,
+ tmp_evt,
tmp_evt->hostdata->dev);
if (tmp_evt->cmnd_done)
tmp_evt->cmnd_done(tmp_evt->cmnd);
@@ -1339,7 +1438,7 @@ static struct scsi_host_template driver_template = {
.cmd_per_lun = 16,
.can_queue = 1, /* Updated after SRP_LOGIN */
.this_id = -1,
- .sg_tablesize = MAX_INDIRECT_BUFS,
+ .sg_tablesize = SG_ALL,
.use_clustering = ENABLE_CLUSTERING,
.shost_attrs = ibmvscsi_attrs,
};
@@ -1442,15 +1541,18 @@ static int ibmvscsi_remove(struct vio_dev *vdev)
*/
static struct vio_device_id ibmvscsi_device_table[] __devinitdata = {
{"vscsi", "IBM,v-scsi"},
- {0,}
+ { "", "" }
};
-
MODULE_DEVICE_TABLE(vio, ibmvscsi_device_table);
+
static struct vio_driver ibmvscsi_driver = {
- .name = "ibmvscsi",
.id_table = ibmvscsi_device_table,
.probe = ibmvscsi_probe,
- .remove = ibmvscsi_remove
+ .remove = ibmvscsi_remove,
+ .driver = {
+ .name = "ibmvscsi",
+ .owner = THIS_MODULE,
+ }
};
int __init ibmvscsi_module_init(void)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.