[PATCH] I2O: new sysfs attributes and Adaptec specific block device access and 64-bit DMA support
Changes:
- Added Bus-OSM which could be used by user space programs to reset a
channel on the controller
- Make ioctl's in Config-OSM obsolete in prefer for sysfs attributes and
move those to its own file
- Added sysfs attribute for firmware read and write access for I2O
controllers
- Added special handling of firmware read and write access for Adaptec
controllers
- Added vendor id and product id as sysfs-attribute to Executive classes
- Added automatic notification of LCT change handling to Exec-OSM
- Added flushing function to Block-OSM for later barrier implementation
- Use PRIVATE messages for Block access on Adaptec controllers, which are
faster then BLOCK class access
- Cleaned up support for Promise controller
- New messages are now detected using the IRQ status register as
suggested by the I2O spec
- Added i2o_dma_high() and i2o_dma_low() functions
- Added facility for SG tablesize calculation when using 32-bit and
64-bit DMA addresses
- Added i2o_dma_map_single() and i2o_dma_map_sg() which could build the
SG list for 32-bit as well as 64-bit DMA addresses
Signed-off-by: Markus Lidel <Markus.Lidel@shadowconnect.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/message/i2o/i2o_block.c b/drivers/message/i2o/i2o_block.c
index e69421e..1dd2b9d 100644
--- a/drivers/message/i2o/i2o_block.c
+++ b/drivers/message/i2o/i2o_block.c
@@ -147,6 +147,29 @@
};
/**
+ * i2o_block_issue_flush - device-flush interface for block-layer
+ * @queue: the request queue of the device which should be flushed
+ * @disk: gendisk
+ * @error_sector: error offset
+ *
+ * Helper function to provide flush functionality to block-layer.
+ *
+ * Returns 0 on success or negative error code on failure.
+ */
+
+static int i2o_block_issue_flush(request_queue_t * queue, struct gendisk *disk,
+ sector_t * error_sector)
+{
+ struct i2o_block_device *i2o_blk_dev = queue->queuedata;
+ int rc = -ENODEV;
+
+ if (likely(i2o_blk_dev))
+ rc = i2o_block_device_flush(i2o_blk_dev->i2o_dev);
+
+ return rc;
+}
+
+/**
* i2o_block_device_mount - Mount (load) the media of device dev
* @dev: I2O device which should receive the mount request
* @media_id: Media Identifier
@@ -299,28 +322,31 @@
/**
* i2o_block_sglist_alloc - Allocate the SG list and map it
+ * @c: I2O controller to which the request belongs
* @ireq: I2O block request
*
- * Builds the SG list and map it into to be accessable by the controller.
+ * Builds the SG list and map it to be accessable by the controller.
*
- * Returns the number of elements in the SG list or 0 on failure.
+ * Returns 0 on failure or 1 on success.
*/
-static inline int i2o_block_sglist_alloc(struct i2o_block_request *ireq)
+static inline int i2o_block_sglist_alloc(struct i2o_controller *c,
+ struct i2o_block_request *ireq,
+ u32 __iomem ** mptr)
{
- struct device *dev = &ireq->i2o_blk_dev->i2o_dev->iop->pdev->dev;
int nents;
+ enum dma_data_direction direction;
+ ireq->dev = &c->pdev->dev;
nents = blk_rq_map_sg(ireq->req->q, ireq->req, ireq->sg_table);
if (rq_data_dir(ireq->req) == READ)
- ireq->sg_dma_direction = PCI_DMA_FROMDEVICE;
+ direction = PCI_DMA_FROMDEVICE;
else
- ireq->sg_dma_direction = PCI_DMA_TODEVICE;
+ direction = PCI_DMA_TODEVICE;
- ireq->sg_nents = dma_map_sg(dev, ireq->sg_table, nents,
- ireq->sg_dma_direction);
+ ireq->sg_nents = nents;
- return ireq->sg_nents;
+ return i2o_dma_map_sg(c, ireq->sg_table, nents, direction, mptr);
};
/**
@@ -331,10 +357,14 @@
*/
static inline void i2o_block_sglist_free(struct i2o_block_request *ireq)
{
- struct device *dev = &ireq->i2o_blk_dev->i2o_dev->iop->pdev->dev;
+ enum dma_data_direction direction;
- dma_unmap_sg(dev, ireq->sg_table, ireq->sg_nents,
- ireq->sg_dma_direction);
+ if (rq_data_dir(ireq->req) == READ)
+ direction = PCI_DMA_FROMDEVICE;
+ else
+ direction = PCI_DMA_TODEVICE;
+
+ dma_unmap_sg(ireq->dev, ireq->sg_table, ireq->sg_nents, direction);
};
/**
@@ -352,6 +382,11 @@
struct i2o_block_device *i2o_blk_dev = q->queuedata;
struct i2o_block_request *ireq;
+ if (unlikely(!i2o_blk_dev)) {
+ osm_err("block device already removed\n");
+ return BLKPREP_KILL;
+ }
+
/* request is already processed by us, so return */
if (req->flags & REQ_SPECIAL) {
osm_debug("REQ_SPECIAL already set!\n");
@@ -414,11 +449,11 @@
{
struct i2o_block_request *ireq = req->special;
struct i2o_block_device *dev = ireq->i2o_blk_dev;
- request_queue_t *q = dev->gd->queue;
+ request_queue_t *q = req->q;
unsigned long flags;
if (end_that_request_chunk(req, uptodate, nr_bytes)) {
- int leftover = (req->hard_nr_sectors << 9);
+ int leftover = (req->hard_nr_sectors << KERNEL_SECTOR_SHIFT);
if (blk_pc_request(req))
leftover = req->data_len;
@@ -432,8 +467,11 @@
spin_lock_irqsave(q->queue_lock, flags);
end_that_request_last(req);
- dev->open_queue_depth--;
- list_del(&ireq->queue);
+
+ if (likely(dev)) {
+ dev->open_queue_depth--;
+ list_del(&ireq->queue);
+ }
blk_start_queue(q);
@@ -483,8 +521,8 @@
* Don't stick a supertrak100 into cache aggressive modes
*/
- osm_err("%03x error status: %02x, detailed status: %04x\n",
- (le32_to_cpu(msg->u.head[1]) >> 12 & 0xfff),
+ osm_err("TID %03x error status: 0x%02x, detailed status: "
+ "0x%04x\n", (le32_to_cpu(msg->u.head[1]) >> 12 & 0xfff),
status >> 24, status & 0xffff);
req->errors++;
@@ -705,18 +743,25 @@
static int i2o_block_transfer(struct request *req)
{
struct i2o_block_device *dev = req->rq_disk->private_data;
- struct i2o_controller *c = dev->i2o_dev->iop;
+ struct i2o_controller *c;
int tid = dev->i2o_dev->lct_data.tid;
struct i2o_message __iomem *msg;
- void __iomem *mptr;
+ u32 __iomem *mptr;
struct i2o_block_request *ireq = req->special;
- struct scatterlist *sg;
- int sgnum;
- int i;
u32 m;
u32 tcntxt;
- u32 sg_flags;
+ u32 sgl_offset = SGL_OFFSET_8;
+ u32 ctl_flags = 0x00000000;
int rc;
+ u32 cmd;
+
+ if (unlikely(!dev->i2o_dev)) {
+ osm_err("transfer to removed drive\n");
+ rc = -ENODEV;
+ goto exit;
+ }
+
+ c = dev->i2o_dev->iop;
m = i2o_msg_get(c, &msg);
if (m == I2O_QUEUE_EMPTY) {
@@ -730,80 +775,109 @@
goto nop_msg;
}
- if ((sgnum = i2o_block_sglist_alloc(ireq)) <= 0) {
+ writel(i2o_block_driver.context, &msg->u.s.icntxt);
+ writel(tcntxt, &msg->u.s.tcntxt);
+
+ mptr = &msg->body[0];
+
+ if (rq_data_dir(req) == READ) {
+ cmd = I2O_CMD_BLOCK_READ << 24;
+
+ switch (dev->rcache) {
+ case CACHE_PREFETCH:
+ ctl_flags = 0x201F0008;
+ break;
+
+ case CACHE_SMARTFETCH:
+ if (req->nr_sectors > 16)
+ ctl_flags = 0x201F0008;
+ else
+ ctl_flags = 0x001F0000;
+ break;
+
+ default:
+ break;
+ }
+ } else {
+ cmd = I2O_CMD_BLOCK_WRITE << 24;
+
+ switch (dev->wcache) {
+ case CACHE_WRITETHROUGH:
+ ctl_flags = 0x001F0008;
+ break;
+ case CACHE_WRITEBACK:
+ ctl_flags = 0x001F0010;
+ break;
+ case CACHE_SMARTBACK:
+ if (req->nr_sectors > 16)
+ ctl_flags = 0x001F0004;
+ else
+ ctl_flags = 0x001F0010;
+ break;
+ case CACHE_SMARTTHROUGH:
+ if (req->nr_sectors > 16)
+ ctl_flags = 0x001F0004;
+ else
+ ctl_flags = 0x001F0010;
+ default:
+ break;
+ }
+ }
+
+#ifdef CONFIG_I2O_EXT_ADAPTEC
+ if (c->adaptec) {
+ u8 cmd[10];
+ u32 scsi_flags;
+ u16 hwsec = queue_hardsect_size(req->q) >> KERNEL_SECTOR_SHIFT;
+
+ memset(cmd, 0, 10);
+
+ sgl_offset = SGL_OFFSET_12;
+
+ writel(I2O_CMD_PRIVATE << 24 | HOST_TID << 12 | tid,
+ &msg->u.head[1]);
+
+ writel(I2O_VENDOR_DPT << 16 | I2O_CMD_SCSI_EXEC, mptr++);
+ writel(tid, mptr++);
+
+ /*
+ * ENABLE_DISCONNECT
+ * SIMPLE_TAG
+ * RETURN_SENSE_DATA_IN_REPLY_MESSAGE_FRAME
+ */
+ if (rq_data_dir(req) == READ) {
+ cmd[0] = 0x28;
+ scsi_flags = 0x60a0000a;
+ } else {
+ cmd[0] = 0x2A;
+ scsi_flags = 0xa0a0000a;
+ }
+
+ writel(scsi_flags, mptr++);
+
+ *((u32 *) & cmd[2]) = cpu_to_be32(req->sector * hwsec);
+ *((u16 *) & cmd[7]) = cpu_to_be16(req->nr_sectors * hwsec);
+
+ memcpy_toio(mptr, cmd, 10);
+ mptr += 4;
+ writel(req->nr_sectors << KERNEL_SECTOR_SHIFT, mptr++);
+ } else
+#endif
+ {
+ writel(cmd | HOST_TID << 12 | tid, &msg->u.head[1]);
+ writel(ctl_flags, mptr++);
+ writel(req->nr_sectors << KERNEL_SECTOR_SHIFT, mptr++);
+ writel((u32) (req->sector << KERNEL_SECTOR_SHIFT), mptr++);
+ writel(req->sector >> (32 - KERNEL_SECTOR_SHIFT), mptr++);
+ }
+
+ if (!i2o_block_sglist_alloc(c, ireq, &mptr)) {
rc = -ENOMEM;
goto context_remove;
}
- /* Build the message based on the request. */
- writel(i2o_block_driver.context, &msg->u.s.icntxt);
- writel(tcntxt, &msg->u.s.tcntxt);
- writel(req->nr_sectors << 9, &msg->body[1]);
-
- writel((((u64) req->sector) << 9) & 0xffffffff, &msg->body[2]);
- writel(req->sector >> 23, &msg->body[3]);
-
- mptr = &msg->body[4];
-
- sg = ireq->sg_table;
-
- if (rq_data_dir(req) == READ) {
- writel(I2O_CMD_BLOCK_READ << 24 | HOST_TID << 12 | tid,
- &msg->u.head[1]);
- sg_flags = 0x10000000;
- switch (dev->rcache) {
- case CACHE_NULL:
- writel(0, &msg->body[0]);
- break;
- case CACHE_PREFETCH:
- writel(0x201F0008, &msg->body[0]);
- break;
- case CACHE_SMARTFETCH:
- if (req->nr_sectors > 16)
- writel(0x201F0008, &msg->body[0]);
- else
- writel(0x001F0000, &msg->body[0]);
- break;
- }
- } else {
- writel(I2O_CMD_BLOCK_WRITE << 24 | HOST_TID << 12 | tid,
- &msg->u.head[1]);
- sg_flags = 0x14000000;
- switch (dev->wcache) {
- case CACHE_NULL:
- writel(0, &msg->body[0]);
- break;
- case CACHE_WRITETHROUGH:
- writel(0x001F0008, &msg->body[0]);
- break;
- case CACHE_WRITEBACK:
- writel(0x001F0010, &msg->body[0]);
- break;
- case CACHE_SMARTBACK:
- if (req->nr_sectors > 16)
- writel(0x001F0004, &msg->body[0]);
- else
- writel(0x001F0010, &msg->body[0]);
- break;
- case CACHE_SMARTTHROUGH:
- if (req->nr_sectors > 16)
- writel(0x001F0004, &msg->body[0]);
- else
- writel(0x001F0010, &msg->body[0]);
- }
- }
-
- for (i = sgnum; i > 0; i--) {
- if (i == 1)
- sg_flags |= 0x80000000;
- writel(sg_flags | sg_dma_len(sg), mptr);
- writel(sg_dma_address(sg), mptr + 4);
- mptr += 8;
- sg++;
- }
-
- writel(I2O_MESSAGE_SIZE(mptr - &msg->u.head[0]) | SGL_OFFSET_8,
- &msg->u.head[0]);
+ writel(I2O_MESSAGE_SIZE(mptr - &msg->u.head[0]) |
+ sgl_offset, &msg->u.head[0]);
list_add_tail(&ireq->queue, &dev->open_queue);
dev->open_queue_depth++;
@@ -846,11 +920,13 @@
queue_depth = ireq->i2o_blk_dev->open_queue_depth;
- if (queue_depth < I2O_BLOCK_MAX_OPEN_REQUESTS)
+ if (queue_depth < I2O_BLOCK_MAX_OPEN_REQUESTS) {
if (!i2o_block_transfer(req)) {
blkdev_dequeue_request(req);
continue;
- }
+ } else
+ osm_info("transfer error\n");
+ }
if (queue_depth)
break;
@@ -933,6 +1009,7 @@
}
blk_queue_prep_rq(queue, i2o_block_prep_req_fn);
+ blk_queue_issue_flush_fn(queue, i2o_block_issue_flush);
gd->major = I2O_MAJOR;
gd->queue = queue;
@@ -974,7 +1051,18 @@
u64 size;
u32 blocksize;
u32 flags, status;
- int segments;
+ u16 body_size = 4;
+ unsigned short max_sectors;
+
+#ifdef CONFIG_I2O_EXT_ADAPTEC
+ if (c->adaptec)
+ body_size = 8;
+#endif
+
+ if (c->limit_sectors)
+ max_sectors = I2O_MAX_SECTORS_LIMITED;
+ else
+ max_sectors = I2O_MAX_SECTORS;
/* skip devices which are used by IOP */
if (i2o_dev->lct_data.user_tid != 0xfff) {
@@ -1009,50 +1097,35 @@
queue = gd->queue;
queue->queuedata = i2o_blk_dev;
- blk_queue_max_phys_segments(queue, I2O_MAX_SEGMENTS);
- blk_queue_max_sectors(queue, I2O_MAX_SECTORS);
+ blk_queue_max_phys_segments(queue, I2O_MAX_PHYS_SEGMENTS);
+ blk_queue_max_sectors(queue, max_sectors);
+ blk_queue_max_hw_segments(queue, i2o_sg_tablesize(c, body_size));
- if (c->short_req)
- segments = 8;
- else {
- i2o_status_block *sb;
-
- sb = c->status_block.virt;
-
- segments = (sb->inbound_frame_size -
- sizeof(struct i2o_message) / 4 - 4) / 2;
- }
-
- blk_queue_max_hw_segments(queue, segments);
-
- osm_debug("max sectors = %d\n", I2O_MAX_SECTORS);
- osm_debug("phys segments = %d\n", I2O_MAX_SEGMENTS);
- osm_debug("hw segments = %d\n", segments);
+ osm_debug("max sectors = %d\n", queue->max_phys_segments);
+ osm_debug("phys segments = %d\n", queue->max_sectors);
+ osm_debug("max hw segments = %d\n", queue->max_hw_segments);
/*
* Ask for the current media data. If that isn't supported
* then we ask for the device capacity data
*/
- if (!i2o_parm_field_get(i2o_dev, 0x0004, 0, &size, 8))
- if (!i2o_parm_field_get(i2o_dev, 0x0000, 4, &size, 8)) {
- osm_warn("could not get size of %s\n", gd->disk_name);
- size = 0;
- }
+ if (i2o_parm_field_get(i2o_dev, 0x0004, 1, &blocksize, 4) ||
+ i2o_parm_field_get(i2o_dev, 0x0000, 3, &blocksize, 4)) {
+ blk_queue_hardsect_size(queue, blocksize);
+ } else
+ osm_warn("unable to get blocksize of %s\n", gd->disk_name);
- if (!i2o_parm_field_get(i2o_dev, 0x0004, 1, &blocksize, 4))
- if (!i2o_parm_field_get(i2o_dev, 0x0000, 3, &blocksize, 4)) {
- osm_warn("unable to get blocksize of %s\n",
- gd->disk_name);
- blocksize = 0;
- }
+ if (i2o_parm_field_get(i2o_dev, 0x0004, 0, &size, 8) ||
+ i2o_parm_field_get(i2o_dev, 0x0000, 4, &size, 8)) {
+ set_capacity(gd, size >> KERNEL_SECTOR_SHIFT);
+ } else
+ osm_warn("could not get size of %s\n", gd->disk_name);
if (!i2o_parm_field_get(i2o_dev, 0x0000, 2, &i2o_blk_dev->power, 2))
i2o_blk_dev->power = 0;
i2o_parm_field_get(i2o_dev, 0x0000, 5, &flags, 4);
i2o_parm_field_get(i2o_dev, 0x0000, 6, &status, 4);
- set_capacity(gd, size >> 9);
-
i2o_event_register(i2o_dev, &i2o_block_driver, 0, 0xffffffff);
add_disk(gd);
@@ -1109,7 +1182,7 @@
goto exit;
}
- i2o_blk_req_pool.pool = mempool_create(I2O_REQ_MEMPOOL_SIZE,
+ i2o_blk_req_pool.pool = mempool_create(I2O_BLOCK_REQ_MEMPOOL_SIZE,
mempool_alloc_slab,
mempool_free_slab,
i2o_blk_req_pool.slab);