mtip32xx: add trim support
TRIM support added through vendor unique command. Signed-off-by: Sam Bradshaw < sbradshaw@micron.com> Signed-off-by: Asai Thambi S P <asamymuthupa@micron.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Asai Thambi S P
Jens Axboe
parent
16c906e51c
commit
152834694d
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@ -1519,6 +1519,12 @@ static int mtip_get_identify(struct mtip_port *port, void __user *user_buffer)
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}
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#endif
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/* Demux ID.DRAT & ID.RZAT to determine trim support */
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if (port->identify[69] & (1 << 14) && port->identify[69] & (1 << 5))
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port->dd->trim_supp = true;
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else
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port->dd->trim_supp = false;
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/* Set the identify buffer as valid. */
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port->identify_valid = 1;
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@ -1705,6 +1711,81 @@ static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id,
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return rv;
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}
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/*
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* Trim unused sectors
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*
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* @dd pointer to driver_data structure
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* @lba starting lba
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* @len # of 512b sectors to trim
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*
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* return value
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* -ENOMEM Out of dma memory
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* -EINVAL Invalid parameters passed in, trim not supported
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* -EIO Error submitting trim request to hw
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*/
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int mtip_send_trim(struct driver_data *dd, unsigned int lba, unsigned int len)
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{
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int i, rv = 0;
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u64 tlba, tlen, sect_left;
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struct mtip_trim_entry *buf;
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dma_addr_t dma_addr;
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struct host_to_dev_fis fis;
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if (!len || dd->trim_supp == false)
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return -EINVAL;
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/* Trim request too big */
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WARN_ON(len > (MTIP_MAX_TRIM_ENTRY_LEN * MTIP_MAX_TRIM_ENTRIES));
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/* Trim request not aligned on 4k boundary */
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WARN_ON(len % 8 != 0);
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/* Warn if vu_trim structure is too big */
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WARN_ON(sizeof(struct mtip_trim) > ATA_SECT_SIZE);
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/* Allocate a DMA buffer for the trim structure */
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buf = dmam_alloc_coherent(&dd->pdev->dev, ATA_SECT_SIZE, &dma_addr,
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GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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memset(buf, 0, ATA_SECT_SIZE);
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for (i = 0, sect_left = len, tlba = lba;
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i < MTIP_MAX_TRIM_ENTRIES && sect_left;
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i++) {
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tlen = (sect_left >= MTIP_MAX_TRIM_ENTRY_LEN ?
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MTIP_MAX_TRIM_ENTRY_LEN :
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sect_left);
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buf[i].lba = __force_bit2int cpu_to_le32(tlba);
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buf[i].range = __force_bit2int cpu_to_le16(tlen);
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tlba += tlen;
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sect_left -= tlen;
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}
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WARN_ON(sect_left != 0);
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/* Build the fis */
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memset(&fis, 0, sizeof(struct host_to_dev_fis));
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fis.type = 0x27;
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fis.opts = 1 << 7;
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fis.command = 0xfb;
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fis.features = 0x60;
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fis.sect_count = 1;
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fis.device = ATA_DEVICE_OBS;
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if (mtip_exec_internal_command(dd->port,
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&fis,
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5,
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dma_addr,
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ATA_SECT_SIZE,
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0,
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GFP_KERNEL,
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MTIP_TRIM_TIMEOUT_MS) < 0)
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rv = -EIO;
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dmam_free_coherent(&dd->pdev->dev, ATA_SECT_SIZE, buf, dma_addr);
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return rv;
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}
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/*
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* Get the drive capacity.
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*
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@ -3675,6 +3756,12 @@ static void mtip_make_request(struct request_queue *queue, struct bio *bio)
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}
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}
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if (unlikely(bio->bi_rw & REQ_DISCARD)) {
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bio_endio(bio, mtip_send_trim(dd, bio->bi_sector,
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bio_sectors(bio)));
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return;
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}
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if (unlikely(!bio_has_data(bio))) {
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blk_queue_flush(queue, 0);
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bio_endio(bio, 0);
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@ -3817,6 +3904,15 @@ skip_create_disk:
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*/
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blk_queue_flush(dd->queue, 0);
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/* Signal trim support */
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if (dd->trim_supp == true) {
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set_bit(QUEUE_FLAG_DISCARD, &dd->queue->queue_flags);
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dd->queue->limits.discard_granularity = 4096;
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blk_queue_max_discard_sectors(dd->queue,
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MTIP_MAX_TRIM_ENTRY_LEN * MTIP_MAX_TRIM_ENTRIES);
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dd->queue->limits.discard_zeroes_data = 0;
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}
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/* Set the capacity of the device in 512 byte sectors. */
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if (!(mtip_hw_get_capacity(dd, &capacity))) {
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dev_warn(&dd->pdev->dev,
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@ -178,6 +178,21 @@ struct mtip_work {
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mtip_workq_sdbfx(w->port, group, w->completed); \
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}
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#define MTIP_TRIM_TIMEOUT_MS 240000
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#define MTIP_MAX_TRIM_ENTRIES 8
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#define MTIP_MAX_TRIM_ENTRY_LEN 0xfff8
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struct mtip_trim_entry {
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u32 lba; /* starting lba of region */
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u16 rsvd; /* unused */
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u16 range; /* # of 512b blocks to trim */
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} __packed;
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struct mtip_trim {
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/* Array of regions to trim */
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struct mtip_trim_entry entry[MTIP_MAX_TRIM_ENTRIES];
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} __packed;
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/* Register Frame Information Structure (FIS), host to device. */
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struct host_to_dev_fis {
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/*
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@ -473,6 +488,8 @@ struct driver_data {
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struct dentry *dfs_node;
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bool trim_supp; /* flag indicating trim support */
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int numa_node; /* NUMA support */
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char workq_name[32];
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