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mtip32xx: remove trim support

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The trim support in mtip32xx has been "temporarily" disabled for 6
years, which is 3/4 of the time the driver even exists in the tree.

Remove it as it obviously is dead code now.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2019-04-25 08:12:11 +02:00 committed by Jens Axboe
parent 95f18c9d13
commit cc6be13159
2 changed files with 0 additions and 106 deletions
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89
drivers/block/mtip32xx/mtip32xx.c
View File

@ -1192,14 +1192,6 @@ static int mtip_get_identify(struct mtip_port *port, void __user *user_buffer)
else
clear_bit(MTIP_DDF_SEC_LOCK_BIT, &port->dd->dd_flag);
#ifdef MTIP_TRIM /* Disabling TRIM support temporarily */
/* Demux ID.DRAT & ID.RZAT to determine trim support */
if (port->identify[69] & (1 << 14) && port->identify[69] & (1 << 5))
port->dd->trim_supp = true;
else
#endif
port->dd->trim_supp = false;
/* Set the identify buffer as valid. */
port->identify_valid = 1;
@ -1386,77 +1378,6 @@ static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id,
return rv;
}
/*
* Trim unused sectors
*
* @dd pointer to driver_data structure
* @lba starting lba
* @len # of 512b sectors to trim
*/
static blk_status_t mtip_send_trim(struct driver_data *dd, unsigned int lba,
unsigned int len)
{
u64 tlba, tlen, sect_left;
struct mtip_trim_entry *buf;
dma_addr_t dma_addr;
struct host_to_dev_fis fis;
blk_status_t ret = BLK_STS_OK;
int i;
if (!len || dd->trim_supp == false)
return BLK_STS_IOERR;
/* Trim request too big */
WARN_ON(len > (MTIP_MAX_TRIM_ENTRY_LEN * MTIP_MAX_TRIM_ENTRIES));
/* Trim request not aligned on 4k boundary */
WARN_ON(len % 8 != 0);
/* Warn if vu_trim structure is too big */
WARN_ON(sizeof(struct mtip_trim) > ATA_SECT_SIZE);
/* Allocate a DMA buffer for the trim structure */
buf = dma_alloc_coherent(&dd->pdev->dev, ATA_SECT_SIZE, &dma_addr,
GFP_KERNEL);
if (!buf)
return BLK_STS_RESOURCE;
memset(buf, 0, ATA_SECT_SIZE);
for (i = 0, sect_left = len, tlba = lba;
i < MTIP_MAX_TRIM_ENTRIES && sect_left;
i++) {
tlen = (sect_left >= MTIP_MAX_TRIM_ENTRY_LEN ?
MTIP_MAX_TRIM_ENTRY_LEN :
sect_left);
buf[i].lba = cpu_to_le32(tlba);
buf[i].range = cpu_to_le16(tlen);
tlba += tlen;
sect_left -= tlen;
}
WARN_ON(sect_left != 0);
/* Build the fis */
memset(&fis, 0, sizeof(struct host_to_dev_fis));
fis.type = 0x27;
fis.opts = 1 << 7;
fis.command = 0xfb;
fis.features = 0x60;
fis.sect_count = 1;
fis.device = ATA_DEVICE_OBS;
if (mtip_exec_internal_command(dd->port,
&fis,
5,
dma_addr,
ATA_SECT_SIZE,
0,
MTIP_TRIM_TIMEOUT_MS) < 0)
ret = BLK_STS_IOERR;
dma_free_coherent(&dd->pdev->dev, ATA_SECT_SIZE, buf, dma_addr);
return ret;
}
/*
* Get the drive capacity.
*
@ -3590,8 +3511,6 @@ static blk_status_t mtip_queue_rq(struct blk_mq_hw_ctx *hctx,
blk_mq_start_request(rq);
if (req_op(rq) == REQ_OP_DISCARD)
return mtip_send_trim(dd, blk_rq_pos(rq), blk_rq_sectors(rq));
mtip_hw_submit_io(dd, rq, cmd, hctx);
return BLK_STS_OK;
}
@ -3769,14 +3688,6 @@ static int mtip_block_initialize(struct driver_data *dd)
blk_queue_max_segment_size(dd->queue, 0x400000);
blk_queue_io_min(dd->queue, 4096);
/* Signal trim support */
if (dd->trim_supp == true) {
blk_queue_flag_set(QUEUE_FLAG_DISCARD, dd->queue);
dd->queue->limits.discard_granularity = 4096;
blk_queue_max_discard_sectors(dd->queue,
MTIP_MAX_TRIM_ENTRY_LEN * MTIP_MAX_TRIM_ENTRIES);
}
/* Set the capacity of the device in 512 byte sectors. */
if (!(mtip_hw_get_capacity(dd, &capacity))) {
dev_warn(&dd->pdev->dev,

17
drivers/block/mtip32xx/mtip32xx.h
View File

@ -193,21 +193,6 @@ struct mtip_work {
mtip_workq_sdbfx(w->port, group, w->completed); \
}
#define MTIP_TRIM_TIMEOUT_MS 240000
#define MTIP_MAX_TRIM_ENTRIES 8
#define MTIP_MAX_TRIM_ENTRY_LEN 0xfff8
struct mtip_trim_entry {
__le32 lba; /* starting lba of region */
__le16 rsvd; /* unused */
__le16 range; /* # of 512b blocks to trim */
} __packed;
struct mtip_trim {
/* Array of regions to trim */
struct mtip_trim_entry entry[MTIP_MAX_TRIM_ENTRIES];
} __packed;
/* Register Frame Information Structure (FIS), host to device. */
struct host_to_dev_fis {
/*
@ -474,8 +459,6 @@ struct driver_data {
struct dentry *dfs_node;
bool trim_supp; /* flag indicating trim support */
bool sr;
int numa_node; /* NUMA support */