forked from Minki/linux
Merge git://git.infradead.org/users/willy/linux-nvme
Pull NVMe driver update from Matthew Wilcox: "Lots of exciting new features in the NVM Express driver this time, including support for emulating SCSI commands, discard support and the ability to submit per-sector metadata with I/Os. It's still mostly bugfixes though!" * git://git.infradead.org/users/willy/linux-nvme: (27 commits) NVMe: Use user defined admin ioctl timeout NVMe: Simplify Firmware Activate code slightly NVMe: Only clear the enable bit when disabling controller NVMe: Wait for device to acknowledge shutdown NVMe: Schedule timeout for sync commands NVMe: Meta-data support in NVME_IOCTL_SUBMIT_IO NVMe: Device specific stripe size handling NVMe: Split non-mergeable bio requests NVMe: Remove dead code in nvme_dev_add NVMe: Check for NULL memory in nvme_dev_add NVMe: Fix error clean-up on nvme_alloc_queue NVMe: Free admin queue on request_irq error NVMe: Add scsi unmap to SG_IO NVMe: queue usage fixes in nvme-scsi NVMe: Set TASK_INTERRUPTIBLE before processing queues NVMe: Add a character device for each nvme device NVMe: Fix endian-related problems in user I/O submission path NVMe: Fix I/O cancellation status on big-endian machines NVMe: Fix sparse warnings in scsi emulation NVMe: Don't fail initialisation unnecessarily ...
This commit is contained in:
Linus Torvalds
commit
2d4fe27850
@ -42,4 +42,5 @@ obj-$(CONFIG_BLK_DEV_PCIESSD_MTIP32XX) += mtip32xx/
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obj-$(CONFIG_BLK_DEV_RSXX) += rsxx/
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nvme-y := nvme-core.o nvme-scsi.o
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swim_mod-y := swim.o swim_asm.o
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@ -39,14 +39,13 @@
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <scsi/sg.h>
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#include <asm-generic/io-64-nonatomic-lo-hi.h>
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#define NVME_Q_DEPTH 1024
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#define SQ_SIZE(depth) (depth * sizeof(struct nvme_command))
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#define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion))
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#define NVME_MINORS 64
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#define NVME_IO_TIMEOUT (5 * HZ)
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#define ADMIN_TIMEOUT (60 * HZ)
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static int nvme_major;
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@ -59,43 +58,6 @@ static DEFINE_SPINLOCK(dev_list_lock);
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static LIST_HEAD(dev_list);
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static struct task_struct *nvme_thread;
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/*
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* Represents an NVM Express device. Each nvme_dev is a PCI function.
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*/
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struct nvme_dev {
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struct list_head node;
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struct nvme_queue **queues;
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u32 __iomem *dbs;
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struct pci_dev *pci_dev;
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struct dma_pool *prp_page_pool;
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struct dma_pool *prp_small_pool;
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int instance;
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int queue_count;
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int db_stride;
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u32 ctrl_config;
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struct msix_entry *entry;
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struct nvme_bar __iomem *bar;
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struct list_head namespaces;
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char serial[20];
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char model[40];
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char firmware_rev[8];
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u32 max_hw_sectors;
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};
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/*
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* An NVM Express namespace is equivalent to a SCSI LUN
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*/
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struct nvme_ns {
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struct list_head list;
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struct nvme_dev *dev;
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struct request_queue *queue;
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struct gendisk *disk;
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int ns_id;
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int lba_shift;
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};
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/*
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* An NVM Express queue. Each device has at least two (one for admin
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* commands and one for I/O commands).
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@ -131,6 +93,7 @@ static inline void _nvme_check_size(void)
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BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64);
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BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64);
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BUILD_BUG_ON(sizeof(struct nvme_features) != 64);
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BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64);
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BUILD_BUG_ON(sizeof(struct nvme_command) != 64);
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BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096);
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BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096);
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@ -261,12 +224,12 @@ static void *cancel_cmdid(struct nvme_queue *nvmeq, int cmdid,
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return ctx;
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}
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static struct nvme_queue *get_nvmeq(struct nvme_dev *dev)
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struct nvme_queue *get_nvmeq(struct nvme_dev *dev)
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{
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return dev->queues[get_cpu() + 1];
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}
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static void put_nvmeq(struct nvme_queue *nvmeq)
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void put_nvmeq(struct nvme_queue *nvmeq)
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{
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put_cpu();
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}
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@ -294,22 +257,6 @@ static int nvme_submit_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd)
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return 0;
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}
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/*
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* The nvme_iod describes the data in an I/O, including the list of PRP
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* entries. You can't see it in this data structure because C doesn't let
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* me express that. Use nvme_alloc_iod to ensure there's enough space
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* allocated to store the PRP list.
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*/
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struct nvme_iod {
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void *private; /* For the use of the submitter of the I/O */
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int npages; /* In the PRP list. 0 means small pool in use */
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int offset; /* Of PRP list */
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int nents; /* Used in scatterlist */
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int length; /* Of data, in bytes */
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dma_addr_t first_dma;
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struct scatterlist sg[0];
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};
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static __le64 **iod_list(struct nvme_iod *iod)
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{
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return ((void *)iod) + iod->offset;
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@ -343,7 +290,7 @@ nvme_alloc_iod(unsigned nseg, unsigned nbytes, gfp_t gfp)
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return iod;
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}
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static void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod)
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void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod)
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{
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const int last_prp = PAGE_SIZE / 8 - 1;
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int i;
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@ -361,16 +308,6 @@ static void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod)
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kfree(iod);
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}
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static void requeue_bio(struct nvme_dev *dev, struct bio *bio)
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{
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struct nvme_queue *nvmeq = get_nvmeq(dev);
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if (bio_list_empty(&nvmeq->sq_cong))
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add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait);
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bio_list_add(&nvmeq->sq_cong, bio);
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put_nvmeq(nvmeq);
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wake_up_process(nvme_thread);
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}
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static void bio_completion(struct nvme_dev *dev, void *ctx,
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struct nvme_completion *cqe)
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{
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@ -382,19 +319,15 @@ static void bio_completion(struct nvme_dev *dev, void *ctx,
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dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents,
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bio_data_dir(bio) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
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nvme_free_iod(dev, iod);
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if (status) {
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if (status)
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bio_endio(bio, -EIO);
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} else if (bio->bi_vcnt > bio->bi_idx) {
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requeue_bio(dev, bio);
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} else {
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else
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bio_endio(bio, 0);
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}
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}
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/* length is in bytes. gfp flags indicates whether we may sleep. */
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static int nvme_setup_prps(struct nvme_dev *dev,
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struct nvme_common_command *cmd, struct nvme_iod *iod,
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int total_len, gfp_t gfp)
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int nvme_setup_prps(struct nvme_dev *dev, struct nvme_common_command *cmd,
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struct nvme_iod *iod, int total_len, gfp_t gfp)
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{
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struct dma_pool *pool;
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int length = total_len;
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@ -473,43 +406,193 @@ static int nvme_setup_prps(struct nvme_dev *dev,
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return total_len;
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}
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struct nvme_bio_pair {
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struct bio b1, b2, *parent;
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struct bio_vec *bv1, *bv2;
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int err;
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atomic_t cnt;
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};
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static void nvme_bio_pair_endio(struct bio *bio, int err)
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{
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struct nvme_bio_pair *bp = bio->bi_private;
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if (err)
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bp->err = err;
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if (atomic_dec_and_test(&bp->cnt)) {
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bio_endio(bp->parent, bp->err);
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if (bp->bv1)
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kfree(bp->bv1);
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if (bp->bv2)
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kfree(bp->bv2);
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kfree(bp);
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}
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}
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static struct nvme_bio_pair *nvme_bio_split(struct bio *bio, int idx,
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int len, int offset)
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{
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struct nvme_bio_pair *bp;
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BUG_ON(len > bio->bi_size);
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BUG_ON(idx > bio->bi_vcnt);
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bp = kmalloc(sizeof(*bp), GFP_ATOMIC);
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if (!bp)
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return NULL;
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bp->err = 0;
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bp->b1 = *bio;
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bp->b2 = *bio;
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bp->b1.bi_size = len;
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bp->b2.bi_size -= len;
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bp->b1.bi_vcnt = idx;
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bp->b2.bi_idx = idx;
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bp->b2.bi_sector += len >> 9;
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if (offset) {
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bp->bv1 = kmalloc(bio->bi_max_vecs * sizeof(struct bio_vec),
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GFP_ATOMIC);
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if (!bp->bv1)
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goto split_fail_1;
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bp->bv2 = kmalloc(bio->bi_max_vecs * sizeof(struct bio_vec),
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GFP_ATOMIC);
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if (!bp->bv2)
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goto split_fail_2;
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memcpy(bp->bv1, bio->bi_io_vec,
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bio->bi_max_vecs * sizeof(struct bio_vec));
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memcpy(bp->bv2, bio->bi_io_vec,
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bio->bi_max_vecs * sizeof(struct bio_vec));
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bp->b1.bi_io_vec = bp->bv1;
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bp->b2.bi_io_vec = bp->bv2;
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bp->b2.bi_io_vec[idx].bv_offset += offset;
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bp->b2.bi_io_vec[idx].bv_len -= offset;
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bp->b1.bi_io_vec[idx].bv_len = offset;
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bp->b1.bi_vcnt++;
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} else
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bp->bv1 = bp->bv2 = NULL;
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bp->b1.bi_private = bp;
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bp->b2.bi_private = bp;
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bp->b1.bi_end_io = nvme_bio_pair_endio;
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bp->b2.bi_end_io = nvme_bio_pair_endio;
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bp->parent = bio;
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atomic_set(&bp->cnt, 2);
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return bp;
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split_fail_2:
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kfree(bp->bv1);
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split_fail_1:
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kfree(bp);
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return NULL;
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}
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static int nvme_split_and_submit(struct bio *bio, struct nvme_queue *nvmeq,
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int idx, int len, int offset)
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{
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struct nvme_bio_pair *bp = nvme_bio_split(bio, idx, len, offset);
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if (!bp)
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return -ENOMEM;
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if (bio_list_empty(&nvmeq->sq_cong))
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add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait);
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bio_list_add(&nvmeq->sq_cong, &bp->b1);
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bio_list_add(&nvmeq->sq_cong, &bp->b2);
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return 0;
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}
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/* NVMe scatterlists require no holes in the virtual address */
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#define BIOVEC_NOT_VIRT_MERGEABLE(vec1, vec2) ((vec2)->bv_offset || \
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(((vec1)->bv_offset + (vec1)->bv_len) % PAGE_SIZE))
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static int nvme_map_bio(struct device *dev, struct nvme_iod *iod,
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static int nvme_map_bio(struct nvme_queue *nvmeq, struct nvme_iod *iod,
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struct bio *bio, enum dma_data_direction dma_dir, int psegs)
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{
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struct bio_vec *bvec, *bvprv = NULL;
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struct scatterlist *sg = NULL;
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int i, old_idx, length = 0, nsegs = 0;
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int i, length = 0, nsegs = 0, split_len = bio->bi_size;
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if (nvmeq->dev->stripe_size)
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split_len = nvmeq->dev->stripe_size -
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((bio->bi_sector << 9) & (nvmeq->dev->stripe_size - 1));
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sg_init_table(iod->sg, psegs);
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old_idx = bio->bi_idx;
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bio_for_each_segment(bvec, bio, i) {
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if (bvprv && BIOVEC_PHYS_MERGEABLE(bvprv, bvec)) {
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sg->length += bvec->bv_len;
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} else {
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if (bvprv && BIOVEC_NOT_VIRT_MERGEABLE(bvprv, bvec))
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break;
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return nvme_split_and_submit(bio, nvmeq, i,
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length, 0);
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sg = sg ? sg + 1 : iod->sg;
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sg_set_page(sg, bvec->bv_page, bvec->bv_len,
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bvec->bv_offset);
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nsegs++;
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}
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if (split_len - length < bvec->bv_len)
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return nvme_split_and_submit(bio, nvmeq, i, split_len,
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split_len - length);
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length += bvec->bv_len;
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bvprv = bvec;
|
||||
}
|
||||
bio->bi_idx = i;
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iod->nents = nsegs;
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||||
sg_mark_end(sg);
|
||||
if (dma_map_sg(dev, iod->sg, iod->nents, dma_dir) == 0) {
|
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bio->bi_idx = old_idx;
|
||||
if (dma_map_sg(nvmeq->q_dmadev, iod->sg, iod->nents, dma_dir) == 0)
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||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
BUG_ON(length != bio->bi_size);
|
||||
return length;
|
||||
}
|
||||
|
||||
/*
|
||||
* We reuse the small pool to allocate the 16-byte range here as it is not
|
||||
* worth having a special pool for these or additional cases to handle freeing
|
||||
* the iod.
|
||||
*/
|
||||
static int nvme_submit_discard(struct nvme_queue *nvmeq, struct nvme_ns *ns,
|
||||
struct bio *bio, struct nvme_iod *iod, int cmdid)
|
||||
{
|
||||
struct nvme_dsm_range *range;
|
||||
struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail];
|
||||
|
||||
range = dma_pool_alloc(nvmeq->dev->prp_small_pool, GFP_ATOMIC,
|
||||
&iod->first_dma);
|
||||
if (!range)
|
||||
return -ENOMEM;
|
||||
|
||||
iod_list(iod)[0] = (__le64 *)range;
|
||||
iod->npages = 0;
|
||||
|
||||
range->cattr = cpu_to_le32(0);
|
||||
range->nlb = cpu_to_le32(bio->bi_size >> ns->lba_shift);
|
||||
range->slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_sector));
|
||||
|
||||
memset(cmnd, 0, sizeof(*cmnd));
|
||||
cmnd->dsm.opcode = nvme_cmd_dsm;
|
||||
cmnd->dsm.command_id = cmdid;
|
||||
cmnd->dsm.nsid = cpu_to_le32(ns->ns_id);
|
||||
cmnd->dsm.prp1 = cpu_to_le64(iod->first_dma);
|
||||
cmnd->dsm.nr = 0;
|
||||
cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD);
|
||||
|
||||
if (++nvmeq->sq_tail == nvmeq->q_depth)
|
||||
nvmeq->sq_tail = 0;
|
||||
writel(nvmeq->sq_tail, nvmeq->q_db);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns,
|
||||
int cmdid)
|
||||
{
|
||||
@ -527,7 +610,7 @@ static int nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns,
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns)
|
||||
int nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns)
|
||||
{
|
||||
int cmdid = alloc_cmdid(nvmeq, (void *)CMD_CTX_FLUSH,
|
||||
special_completion, NVME_IO_TIMEOUT);
|
||||
@ -567,6 +650,12 @@ static int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns,
|
||||
if (unlikely(cmdid < 0))
|
||||
goto free_iod;
|
||||
|
||||
if (bio->bi_rw & REQ_DISCARD) {
|
||||
result = nvme_submit_discard(nvmeq, ns, bio, iod, cmdid);
|
||||
if (result)
|
||||
goto free_cmdid;
|
||||
return result;
|
||||
}
|
||||
if ((bio->bi_rw & REQ_FLUSH) && !psegs)
|
||||
return nvme_submit_flush(nvmeq, ns, cmdid);
|
||||
|
||||
@ -591,8 +680,8 @@ static int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns,
|
||||
dma_dir = DMA_FROM_DEVICE;
|
||||
}
|
||||
|
||||
result = nvme_map_bio(nvmeq->q_dmadev, iod, bio, dma_dir, psegs);
|
||||
if (result < 0)
|
||||
result = nvme_map_bio(nvmeq, iod, bio, dma_dir, psegs);
|
||||
if (result <= 0)
|
||||
goto free_cmdid;
|
||||
length = result;
|
||||
|
||||
@ -600,13 +689,11 @@ static int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns,
|
||||
cmnd->rw.nsid = cpu_to_le32(ns->ns_id);
|
||||
length = nvme_setup_prps(nvmeq->dev, &cmnd->common, iod, length,
|
||||
GFP_ATOMIC);
|
||||
cmnd->rw.slba = cpu_to_le64(bio->bi_sector >> (ns->lba_shift - 9));
|
||||
cmnd->rw.slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_sector));
|
||||
cmnd->rw.length = cpu_to_le16((length >> ns->lba_shift) - 1);
|
||||
cmnd->rw.control = cpu_to_le16(control);
|
||||
cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt);
|
||||
|
||||
bio->bi_sector += length >> 9;
|
||||
|
||||
if (++nvmeq->sq_tail == nvmeq->q_depth)
|
||||
nvmeq->sq_tail = 0;
|
||||
writel(nvmeq->sq_tail, nvmeq->q_db);
|
||||
@ -724,8 +811,8 @@ static void sync_completion(struct nvme_dev *dev, void *ctx,
|
||||
* Returns 0 on success. If the result is negative, it's a Linux error code;
|
||||
* if the result is positive, it's an NVM Express status code
|
||||
*/
|
||||
static int nvme_submit_sync_cmd(struct nvme_queue *nvmeq,
|
||||
struct nvme_command *cmd, u32 *result, unsigned timeout)
|
||||
int nvme_submit_sync_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd,
|
||||
u32 *result, unsigned timeout)
|
||||
{
|
||||
int cmdid;
|
||||
struct sync_cmd_info cmdinfo;
|
||||
@ -741,7 +828,7 @@ static int nvme_submit_sync_cmd(struct nvme_queue *nvmeq,
|
||||
|
||||
set_current_state(TASK_KILLABLE);
|
||||
nvme_submit_cmd(nvmeq, cmd);
|
||||
schedule();
|
||||
schedule_timeout(timeout);
|
||||
|
||||
if (cmdinfo.status == -EINTR) {
|
||||
nvme_abort_command(nvmeq, cmdid);
|
||||
@ -754,7 +841,7 @@ static int nvme_submit_sync_cmd(struct nvme_queue *nvmeq,
|
||||
return cmdinfo.status;
|
||||
}
|
||||
|
||||
static int nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd,
|
||||
int nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd,
|
||||
u32 *result)
|
||||
{
|
||||
return nvme_submit_sync_cmd(dev->queues[0], cmd, result, ADMIN_TIMEOUT);
|
||||
@ -827,7 +914,7 @@ static int adapter_delete_sq(struct nvme_dev *dev, u16 sqid)
|
||||
return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid);
|
||||
}
|
||||
|
||||
static int nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns,
|
||||
int nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns,
|
||||
dma_addr_t dma_addr)
|
||||
{
|
||||
struct nvme_command c;
|
||||
@ -841,7 +928,7 @@ static int nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns,
|
||||
return nvme_submit_admin_cmd(dev, &c, NULL);
|
||||
}
|
||||
|
||||
static int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
|
||||
int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
|
||||
dma_addr_t dma_addr, u32 *result)
|
||||
{
|
||||
struct nvme_command c;
|
||||
@ -855,8 +942,8 @@ static int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
|
||||
return nvme_submit_admin_cmd(dev, &c, result);
|
||||
}
|
||||
|
||||
static int nvme_set_features(struct nvme_dev *dev, unsigned fid,
|
||||
unsigned dword11, dma_addr_t dma_addr, u32 *result)
|
||||
int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,
|
||||
dma_addr_t dma_addr, u32 *result)
|
||||
{
|
||||
struct nvme_command c;
|
||||
|
||||
@ -885,7 +972,7 @@ static void nvme_cancel_ios(struct nvme_queue *nvmeq, bool timeout)
|
||||
void *ctx;
|
||||
nvme_completion_fn fn;
|
||||
static struct nvme_completion cqe = {
|
||||
.status = cpu_to_le16(NVME_SC_ABORT_REQ) << 1,
|
||||
.status = cpu_to_le16(NVME_SC_ABORT_REQ << 1),
|
||||
};
|
||||
|
||||
if (timeout && !time_after(now, info[cmdid].timeout))
|
||||
@ -966,7 +1053,7 @@ static struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid,
|
||||
return nvmeq;
|
||||
|
||||
free_cqdma:
|
||||
dma_free_coherent(dmadev, CQ_SIZE(nvmeq->q_depth), (void *)nvmeq->cqes,
|
||||
dma_free_coherent(dmadev, CQ_SIZE(depth), (void *)nvmeq->cqes,
|
||||
nvmeq->cq_dma_addr);
|
||||
free_nvmeq:
|
||||
kfree(nvmeq);
|
||||
@ -1021,15 +1108,60 @@ static struct nvme_queue *nvme_create_queue(struct nvme_dev *dev, int qid,
|
||||
return ERR_PTR(result);
|
||||
}
|
||||
|
||||
static int nvme_wait_ready(struct nvme_dev *dev, u64 cap, bool enabled)
|
||||
{
|
||||
unsigned long timeout;
|
||||
u32 bit = enabled ? NVME_CSTS_RDY : 0;
|
||||
|
||||
timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies;
|
||||
|
||||
while ((readl(&dev->bar->csts) & NVME_CSTS_RDY) != bit) {
|
||||
msleep(100);
|
||||
if (fatal_signal_pending(current))
|
||||
return -EINTR;
|
||||
if (time_after(jiffies, timeout)) {
|
||||
dev_err(&dev->pci_dev->dev,
|
||||
"Device not ready; aborting initialisation\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* If the device has been passed off to us in an enabled state, just clear
|
||||
* the enabled bit. The spec says we should set the 'shutdown notification
|
||||
* bits', but doing so may cause the device to complete commands to the
|
||||
* admin queue ... and we don't know what memory that might be pointing at!
|
||||
*/
|
||||
static int nvme_disable_ctrl(struct nvme_dev *dev, u64 cap)
|
||||
{
|
||||
u32 cc = readl(&dev->bar->cc);
|
||||
|
||||
if (cc & NVME_CC_ENABLE)
|
||||
writel(cc & ~NVME_CC_ENABLE, &dev->bar->cc);
|
||||
return nvme_wait_ready(dev, cap, false);
|
||||
}
|
||||
|
||||
static int nvme_enable_ctrl(struct nvme_dev *dev, u64 cap)
|
||||
{
|
||||
return nvme_wait_ready(dev, cap, true);
|
||||
}
|
||||
|
||||
static int nvme_configure_admin_queue(struct nvme_dev *dev)
|
||||
{
|
||||
int result = 0;
|
||||
int result;
|
||||
u32 aqa;
|
||||
u64 cap;
|
||||
unsigned long timeout;
|
||||
u64 cap = readq(&dev->bar->cap);
|
||||
struct nvme_queue *nvmeq;
|
||||
|
||||
dev->dbs = ((void __iomem *)dev->bar) + 4096;
|
||||
dev->db_stride = NVME_CAP_STRIDE(cap);
|
||||
|
||||
result = nvme_disable_ctrl(dev, cap);
|
||||
if (result < 0)
|
||||
return result;
|
||||
|
||||
nvmeq = nvme_alloc_queue(dev, 0, 64, 0);
|
||||
if (!nvmeq)
|
||||
@ -1043,38 +1175,28 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev)
|
||||
dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE;
|
||||
dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES;
|
||||
|
||||
writel(0, &dev->bar->cc);
|
||||
writel(aqa, &dev->bar->aqa);
|
||||
writeq(nvmeq->sq_dma_addr, &dev->bar->asq);
|
||||
writeq(nvmeq->cq_dma_addr, &dev->bar->acq);
|
||||
writel(dev->ctrl_config, &dev->bar->cc);
|
||||
|
||||
cap = readq(&dev->bar->cap);
|
||||
timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies;
|
||||
dev->db_stride = NVME_CAP_STRIDE(cap);
|
||||
|
||||
while (!result && !(readl(&dev->bar->csts) & NVME_CSTS_RDY)) {
|
||||
msleep(100);
|
||||
if (fatal_signal_pending(current))
|
||||
result = -EINTR;
|
||||
if (time_after(jiffies, timeout)) {
|
||||
dev_err(&dev->pci_dev->dev,
|
||||
"Device not ready; aborting initialisation\n");
|
||||
result = -ENODEV;
|
||||
}
|
||||
}
|
||||
|
||||
if (result) {
|
||||
nvme_free_queue_mem(nvmeq);
|
||||
return result;
|
||||
}
|
||||
result = nvme_enable_ctrl(dev, cap);
|
||||
if (result)
|
||||
goto free_q;
|
||||
|
||||
result = queue_request_irq(dev, nvmeq, "nvme admin");
|
||||
if (result)
|
||||
goto free_q;
|
||||
|
||||
dev->queues[0] = nvmeq;
|
||||
return result;
|
||||
|
||||
free_q:
|
||||
nvme_free_queue_mem(nvmeq);
|
||||
return result;
|
||||
}
|
||||
|
||||
static struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write,
|
||||
struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write,
|
||||
unsigned long addr, unsigned length)
|
||||
{
|
||||
int i, err, count, nents, offset;
|
||||
@ -1130,7 +1252,7 @@ static struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write,
|
||||
return ERR_PTR(err);
|
||||
}
|
||||
|
||||
static void nvme_unmap_user_pages(struct nvme_dev *dev, int write,
|
||||
void nvme_unmap_user_pages(struct nvme_dev *dev, int write,
|
||||
struct nvme_iod *iod)
|
||||
{
|
||||
int i;
|
||||
@ -1148,13 +1270,19 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
|
||||
struct nvme_queue *nvmeq;
|
||||
struct nvme_user_io io;
|
||||
struct nvme_command c;
|
||||
unsigned length;
|
||||
int status;
|
||||
struct nvme_iod *iod;
|
||||
unsigned length, meta_len;
|
||||
int status, i;
|
||||
struct nvme_iod *iod, *meta_iod = NULL;
|
||||
dma_addr_t meta_dma_addr;
|
||||
void *meta, *uninitialized_var(meta_mem);
|
||||
|
||||
if (copy_from_user(&io, uio, sizeof(io)))
|
||||
return -EFAULT;
|
||||
length = (io.nblocks + 1) << ns->lba_shift;
|
||||
meta_len = (io.nblocks + 1) * ns->ms;
|
||||
|
||||
if (meta_len && ((io.metadata & 3) || !io.metadata))
|
||||
return -EINVAL;
|
||||
|
||||
switch (io.opcode) {
|
||||
case nvme_cmd_write:
|
||||
@ -1176,11 +1304,42 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
|
||||
c.rw.slba = cpu_to_le64(io.slba);
|
||||
c.rw.length = cpu_to_le16(io.nblocks);
|
||||
c.rw.control = cpu_to_le16(io.control);
|
||||
c.rw.dsmgmt = cpu_to_le16(io.dsmgmt);
|
||||
c.rw.reftag = io.reftag;
|
||||
c.rw.apptag = io.apptag;
|
||||
c.rw.appmask = io.appmask;
|
||||
/* XXX: metadata */
|
||||
c.rw.dsmgmt = cpu_to_le32(io.dsmgmt);
|
||||
c.rw.reftag = cpu_to_le32(io.reftag);
|
||||
c.rw.apptag = cpu_to_le16(io.apptag);
|
||||
c.rw.appmask = cpu_to_le16(io.appmask);
|
||||
|
||||
if (meta_len) {
|
||||
meta_iod = nvme_map_user_pages(dev, io.opcode & 1, io.metadata, meta_len);
|
||||
if (IS_ERR(meta_iod)) {
|
||||
status = PTR_ERR(meta_iod);
|
||||
meta_iod = NULL;
|
||||
goto unmap;
|
||||
}
|
||||
|
||||
meta_mem = dma_alloc_coherent(&dev->pci_dev->dev, meta_len,
|
||||
&meta_dma_addr, GFP_KERNEL);
|
||||
if (!meta_mem) {
|
||||
status = -ENOMEM;
|
||||
goto unmap;
|
||||
}
|
||||
|
||||
if (io.opcode & 1) {
|
||||
int meta_offset = 0;
|
||||
|
||||
for (i = 0; i < meta_iod->nents; i++) {
|
||||
meta = kmap_atomic(sg_page(&meta_iod->sg[i])) +
|
||||
meta_iod->sg[i].offset;
|
||||
memcpy(meta_mem + meta_offset, meta,
|
||||
meta_iod->sg[i].length);
|
||||
kunmap_atomic(meta);
|
||||
meta_offset += meta_iod->sg[i].length;
|
||||
}
|
||||
}
|
||||
|
||||
c.rw.metadata = cpu_to_le64(meta_dma_addr);
|
||||
}
|
||||
|
||||
length = nvme_setup_prps(dev, &c.common, iod, length, GFP_KERNEL);
|
||||
|
||||
nvmeq = get_nvmeq(dev);
|
||||
@ -1196,8 +1355,33 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
|
||||
else
|
||||
status = nvme_submit_sync_cmd(nvmeq, &c, NULL, NVME_IO_TIMEOUT);
|
||||
|
||||
if (meta_len) {
|
||||
if (status == NVME_SC_SUCCESS && !(io.opcode & 1)) {
|
||||
int meta_offset = 0;
|
||||
|
||||
for (i = 0; i < meta_iod->nents; i++) {
|
||||
meta = kmap_atomic(sg_page(&meta_iod->sg[i])) +
|
||||
meta_iod->sg[i].offset;
|
||||
memcpy(meta, meta_mem + meta_offset,
|
||||
meta_iod->sg[i].length);
|
||||
kunmap_atomic(meta);
|
||||
meta_offset += meta_iod->sg[i].length;
|
||||
}
|
||||
}
|
||||
|
||||
dma_free_coherent(&dev->pci_dev->dev, meta_len, meta_mem,
|
||||
meta_dma_addr);
|
||||
}
|
||||
|
||||
unmap:
|
||||
nvme_unmap_user_pages(dev, io.opcode & 1, iod);
|
||||
nvme_free_iod(dev, iod);
|
||||
|
||||
if (meta_iod) {
|
||||
nvme_unmap_user_pages(dev, io.opcode & 1, meta_iod);
|
||||
nvme_free_iod(dev, meta_iod);
|
||||
}
|
||||
|
||||
return status;
|
||||
}
|
||||
|
||||
@ -1208,6 +1392,7 @@ static int nvme_user_admin_cmd(struct nvme_dev *dev,
|
||||
struct nvme_command c;
|
||||
int status, length;
|
||||
struct nvme_iod *uninitialized_var(iod);
|
||||
unsigned timeout;
|
||||
|
||||
if (!capable(CAP_SYS_ADMIN))
|
||||
return -EACCES;
|
||||
@ -1237,10 +1422,13 @@ static int nvme_user_admin_cmd(struct nvme_dev *dev,
|
||||
GFP_KERNEL);
|
||||
}
|
||||
|
||||
timeout = cmd.timeout_ms ? msecs_to_jiffies(cmd.timeout_ms) :
|
||||
ADMIN_TIMEOUT;
|
||||
if (length != cmd.data_len)
|
||||
status = -ENOMEM;
|
||||
else
|
||||
status = nvme_submit_admin_cmd(dev, &c, &cmd.result);
|
||||
status = nvme_submit_sync_cmd(dev->queues[0], &c, &cmd.result,
|
||||
timeout);
|
||||
|
||||
if (cmd.data_len) {
|
||||
nvme_unmap_user_pages(dev, cmd.opcode & 1, iod);
|
||||
@ -1266,6 +1454,10 @@ static int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
|
||||
return nvme_user_admin_cmd(ns->dev, (void __user *)arg);
|
||||
case NVME_IOCTL_SUBMIT_IO:
|
||||
return nvme_submit_io(ns, (void __user *)arg);
|
||||
case SG_GET_VERSION_NUM:
|
||||
return nvme_sg_get_version_num((void __user *)arg);
|
||||
case SG_IO:
|
||||
return nvme_sg_io(ns, (void __user *)arg);
|
||||
default:
|
||||
return -ENOTTY;
|
||||
}
|
||||
@ -1282,13 +1474,17 @@ static void nvme_resubmit_bios(struct nvme_queue *nvmeq)
|
||||
while (bio_list_peek(&nvmeq->sq_cong)) {
|
||||
struct bio *bio = bio_list_pop(&nvmeq->sq_cong);
|
||||
struct nvme_ns *ns = bio->bi_bdev->bd_disk->private_data;
|
||||
if (nvme_submit_bio_queue(nvmeq, ns, bio)) {
|
||||
bio_list_add_head(&nvmeq->sq_cong, bio);
|
||||
break;
|
||||
}
|
||||
|
||||
if (bio_list_empty(&nvmeq->sq_cong))
|
||||
remove_wait_queue(&nvmeq->sq_full,
|
||||
&nvmeq->sq_cong_wait);
|
||||
if (nvme_submit_bio_queue(nvmeq, ns, bio)) {
|
||||
if (bio_list_empty(&nvmeq->sq_cong))
|
||||
add_wait_queue(&nvmeq->sq_full,
|
||||
&nvmeq->sq_cong_wait);
|
||||
bio_list_add_head(&nvmeq->sq_cong, bio);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@ -1297,7 +1493,7 @@ static int nvme_kthread(void *data)
|
||||
struct nvme_dev *dev;
|
||||
|
||||
while (!kthread_should_stop()) {
|
||||
__set_current_state(TASK_RUNNING);
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
spin_lock(&dev_list_lock);
|
||||
list_for_each_entry(dev, &dev_list, node) {
|
||||
int i;
|
||||
@ -1314,8 +1510,7 @@ static int nvme_kthread(void *data)
|
||||
}
|
||||
}
|
||||
spin_unlock(&dev_list_lock);
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
schedule_timeout(HZ);
|
||||
schedule_timeout(round_jiffies_relative(HZ));
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
@ -1347,6 +1542,16 @@ static void nvme_put_ns_idx(int index)
|
||||
spin_unlock(&dev_list_lock);
|
||||
}
|
||||
|
||||
static void nvme_config_discard(struct nvme_ns *ns)
|
||||
{
|
||||
u32 logical_block_size = queue_logical_block_size(ns->queue);
|
||||
ns->queue->limits.discard_zeroes_data = 0;
|
||||
ns->queue->limits.discard_alignment = logical_block_size;
|
||||
ns->queue->limits.discard_granularity = logical_block_size;
|
||||
ns->queue->limits.max_discard_sectors = 0xffffffff;
|
||||
queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue);
|
||||
}
|
||||
|
||||
static struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, int nsid,
|
||||
struct nvme_id_ns *id, struct nvme_lba_range_type *rt)
|
||||
{
|
||||
@ -1366,7 +1571,6 @@ static struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, int nsid,
|
||||
ns->queue->queue_flags = QUEUE_FLAG_DEFAULT;
|
||||
queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue);
|
||||
queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue);
|
||||
/* queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); */
|
||||
blk_queue_make_request(ns->queue, nvme_make_request);
|
||||
ns->dev = dev;
|
||||
ns->queue->queuedata = ns;
|
||||
@ -1378,6 +1582,7 @@ static struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, int nsid,
|
||||
ns->disk = disk;
|
||||
lbaf = id->flbas & 0xf;
|
||||
ns->lba_shift = id->lbaf[lbaf].ds;
|
||||
ns->ms = le16_to_cpu(id->lbaf[lbaf].ms);
|
||||
blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift);
|
||||
if (dev->max_hw_sectors)
|
||||
blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors);
|
||||
@ -1392,6 +1597,9 @@ static struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, int nsid,
|
||||
sprintf(disk->disk_name, "nvme%dn%d", dev->instance, nsid);
|
||||
set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9));
|
||||
|
||||
if (dev->oncs & NVME_CTRL_ONCS_DSM)
|
||||
nvme_config_discard(ns);
|
||||
|
||||
return ns;
|
||||
|
||||
out_free_queue:
|
||||
@ -1496,14 +1704,21 @@ static void nvme_free_queues(struct nvme_dev *dev)
|
||||
nvme_free_queue(dev, i);
|
||||
}
|
||||
|
||||
/*
|
||||
* Return: error value if an error occurred setting up the queues or calling
|
||||
* Identify Device. 0 if these succeeded, even if adding some of the
|
||||
* namespaces failed. At the moment, these failures are silent. TBD which
|
||||
* failures should be reported.
|
||||
*/
|
||||
static int nvme_dev_add(struct nvme_dev *dev)
|
||||
{
|
||||
int res, nn, i;
|
||||
struct nvme_ns *ns, *next;
|
||||
struct nvme_ns *ns;
|
||||
struct nvme_id_ctrl *ctrl;
|
||||
struct nvme_id_ns *id_ns;
|
||||
void *mem;
|
||||
dma_addr_t dma_addr;
|
||||
int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12;
|
||||
|
||||
res = nvme_setup_io_queues(dev);
|
||||
if (res)
|
||||
@ -1511,22 +1726,26 @@ static int nvme_dev_add(struct nvme_dev *dev)
|
||||
|
||||
mem = dma_alloc_coherent(&dev->pci_dev->dev, 8192, &dma_addr,
|
||||
GFP_KERNEL);
|
||||
if (!mem)
|
||||
return -ENOMEM;
|
||||
|
||||
res = nvme_identify(dev, 0, 1, dma_addr);
|
||||
if (res) {
|
||||
res = -EIO;
|
||||
goto out_free;
|
||||
goto out;
|
||||
}
|
||||
|
||||
ctrl = mem;
|
||||
nn = le32_to_cpup(&ctrl->nn);
|
||||
dev->oncs = le16_to_cpup(&ctrl->oncs);
|
||||
memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn));
|
||||
memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn));
|
||||
memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr));
|
||||
if (ctrl->mdts) {
|
||||
int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12;
|
||||
if (ctrl->mdts)
|
||||
dev->max_hw_sectors = 1 << (ctrl->mdts + shift - 9);
|
||||
}
|
||||
if ((dev->pci_dev->vendor == PCI_VENDOR_ID_INTEL) &&
|
||||
(dev->pci_dev->device == 0x0953) && ctrl->vs[3])
|
||||
dev->stripe_size = 1 << (ctrl->vs[3] + shift);
|
||||
|
||||
id_ns = mem;
|
||||
for (i = 1; i <= nn; i++) {
|
||||
@ -1548,14 +1767,7 @@ static int nvme_dev_add(struct nvme_dev *dev)
|
||||
}
|
||||
list_for_each_entry(ns, &dev->namespaces, list)
|
||||
add_disk(ns->disk);
|
||||
|
||||
goto out;
|
||||
|
||||
out_free:
|
||||
list_for_each_entry_safe(ns, next, &dev->namespaces, list) {
|
||||
list_del(&ns->list);
|
||||
nvme_ns_free(ns);
|
||||
}
|
||||
res = 0;
|
||||
|
||||
out:
|
||||
dma_free_coherent(&dev->pci_dev->dev, 8192, mem, dma_addr);
|
||||
@ -1634,6 +1846,56 @@ static void nvme_release_instance(struct nvme_dev *dev)
|
||||
spin_unlock(&dev_list_lock);
|
||||
}
|
||||
|
||||
static void nvme_free_dev(struct kref *kref)
|
||||
{
|
||||
struct nvme_dev *dev = container_of(kref, struct nvme_dev, kref);
|
||||
nvme_dev_remove(dev);
|
||||
pci_disable_msix(dev->pci_dev);
|
||||
iounmap(dev->bar);
|
||||
nvme_release_instance(dev);
|
||||
nvme_release_prp_pools(dev);
|
||||
pci_disable_device(dev->pci_dev);
|
||||
pci_release_regions(dev->pci_dev);
|
||||
kfree(dev->queues);
|
||||
kfree(dev->entry);
|
||||
kfree(dev);
|
||||
}
|
||||
|
||||
static int nvme_dev_open(struct inode *inode, struct file *f)
|
||||
{
|
||||
struct nvme_dev *dev = container_of(f->private_data, struct nvme_dev,
|
||||
miscdev);
|
||||
kref_get(&dev->kref);
|
||||
f->private_data = dev;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int nvme_dev_release(struct inode *inode, struct file *f)
|
||||
{
|
||||
struct nvme_dev *dev = f->private_data;
|
||||
kref_put(&dev->kref, nvme_free_dev);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static long nvme_dev_ioctl(struct file *f, unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
struct nvme_dev *dev = f->private_data;
|
||||
switch (cmd) {
|
||||
case NVME_IOCTL_ADMIN_CMD:
|
||||
return nvme_user_admin_cmd(dev, (void __user *)arg);
|
||||
default:
|
||||
return -ENOTTY;
|
||||
}
|
||||
}
|
||||
|
||||
static const struct file_operations nvme_dev_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = nvme_dev_open,
|
||||
.release = nvme_dev_release,
|
||||
.unlocked_ioctl = nvme_dev_ioctl,
|
||||
.compat_ioctl = nvme_dev_ioctl,
|
||||
};
|
||||
|
||||
static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
|
||||
{
|
||||
int bars, result = -ENOMEM;
|
||||
@ -1692,8 +1954,20 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
|
||||
if (result)
|
||||
goto delete;
|
||||
|
||||
scnprintf(dev->name, sizeof(dev->name), "nvme%d", dev->instance);
|
||||
dev->miscdev.minor = MISC_DYNAMIC_MINOR;
|
||||
dev->miscdev.parent = &pdev->dev;
|
||||
dev->miscdev.name = dev->name;
|
||||
dev->miscdev.fops = &nvme_dev_fops;
|
||||
result = misc_register(&dev->miscdev);
|
||||
if (result)
|
||||
goto remove;
|
||||
|
||||
kref_init(&dev->kref);
|
||||
return 0;
|
||||
|
||||
remove:
|
||||
nvme_dev_remove(dev);
|
||||
delete:
|
||||
spin_lock(&dev_list_lock);
|
||||
list_del(&dev->node);
|
||||
@ -1719,16 +1993,8 @@ static int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id)
|
||||
static void nvme_remove(struct pci_dev *pdev)
|
||||
{
|
||||
struct nvme_dev *dev = pci_get_drvdata(pdev);
|
||||
nvme_dev_remove(dev);
|
||||
pci_disable_msix(pdev);
|
||||
iounmap(dev->bar);
|
||||
nvme_release_instance(dev);
|
||||
nvme_release_prp_pools(dev);
|
||||
pci_disable_device(pdev);
|
||||
pci_release_regions(pdev);
|
||||
kfree(dev->queues);
|
||||
kfree(dev->entry);
|
||||
kfree(dev);
|
||||
misc_deregister(&dev->miscdev);
|
||||
kref_put(&dev->kref, nvme_free_dev);
|
||||
}
|
||||
|
||||
/* These functions are yet to be implemented */
|
||||
3053
drivers/block/nvme-scsi.c
Normal file
3053
drivers/block/nvme-scsi.c
Normal file
File diff suppressed because it is too large
Load Diff
@ -107,6 +107,12 @@ struct nvme_id_ctrl {
|
||||
__u8 vs[1024];
|
||||
};
|
||||
|
||||
enum {
|
||||
NVME_CTRL_ONCS_COMPARE = 1 << 0,
|
||||
NVME_CTRL_ONCS_WRITE_UNCORRECTABLE = 1 << 1,
|
||||
NVME_CTRL_ONCS_DSM = 1 << 2,
|
||||
};
|
||||
|
||||
struct nvme_lbaf {
|
||||
__le16 ms;
|
||||
__u8 ds;
|
||||
@ -201,11 +207,11 @@ struct nvme_common_command {
|
||||
__u8 flags;
|
||||
__u16 command_id;
|
||||
__le32 nsid;
|
||||
__u32 cdw2[2];
|
||||
__le32 cdw2[2];
|
||||
__le64 metadata;
|
||||
__le64 prp1;
|
||||
__le64 prp2;
|
||||
__u32 cdw10[6];
|
||||
__le32 cdw10[6];
|
||||
};
|
||||
|
||||
struct nvme_rw_command {
|
||||
@ -246,6 +252,31 @@ enum {
|
||||
NVME_RW_DSM_COMPRESSED = 1 << 7,
|
||||
};
|
||||
|
||||
struct nvme_dsm_cmd {
|
||||
__u8 opcode;
|
||||
__u8 flags;
|
||||
__u16 command_id;
|
||||
__le32 nsid;
|
||||
__u64 rsvd2[2];
|
||||
__le64 prp1;
|
||||
__le64 prp2;
|
||||
__le32 nr;
|
||||
__le32 attributes;
|
||||
__u32 rsvd12[4];
|
||||
};
|
||||
|
||||
enum {
|
||||
NVME_DSMGMT_IDR = 1 << 0,
|
||||
NVME_DSMGMT_IDW = 1 << 1,
|
||||
NVME_DSMGMT_AD = 1 << 2,
|
||||
};
|
||||
|
||||
struct nvme_dsm_range {
|
||||
__le32 cattr;
|
||||
__le32 nlb;
|
||||
__le64 slba;
|
||||
};
|
||||
|
||||
/* Admin commands */
|
||||
|
||||
enum nvme_admin_opcode {
|
||||
@ -285,6 +316,9 @@ enum {
|
||||
NVME_FEAT_WRITE_ATOMIC = 0x0a,
|
||||
NVME_FEAT_ASYNC_EVENT = 0x0b,
|
||||
NVME_FEAT_SW_PROGRESS = 0x0c,
|
||||
NVME_FWACT_REPL = (0 << 3),
|
||||
NVME_FWACT_REPL_ACTV = (1 << 3),
|
||||
NVME_FWACT_ACTV = (2 << 3),
|
||||
};
|
||||
|
||||
struct nvme_identify {
|
||||
@ -362,6 +396,16 @@ struct nvme_download_firmware {
|
||||
__u32 rsvd12[4];
|
||||
};
|
||||
|
||||
struct nvme_format_cmd {
|
||||
__u8 opcode;
|
||||
__u8 flags;
|
||||
__u16 command_id;
|
||||
__le32 nsid;
|
||||
__u64 rsvd2[4];
|
||||
__le32 cdw10;
|
||||
__u32 rsvd11[5];
|
||||
};
|
||||
|
||||
struct nvme_command {
|
||||
union {
|
||||
struct nvme_common_command common;
|
||||
@ -372,6 +416,8 @@ struct nvme_command {
|
||||
struct nvme_create_sq create_sq;
|
||||
struct nvme_delete_queue delete_queue;
|
||||
struct nvme_download_firmware dlfw;
|
||||
struct nvme_format_cmd format;
|
||||
struct nvme_dsm_cmd dsm;
|
||||
};
|
||||
};
|
||||
|
||||
@ -388,6 +434,7 @@ enum {
|
||||
NVME_SC_FUSED_FAIL = 0x9,
|
||||
NVME_SC_FUSED_MISSING = 0xa,
|
||||
NVME_SC_INVALID_NS = 0xb,
|
||||
NVME_SC_CMD_SEQ_ERROR = 0xc,
|
||||
NVME_SC_LBA_RANGE = 0x80,
|
||||
NVME_SC_CAP_EXCEEDED = 0x81,
|
||||
NVME_SC_NS_NOT_READY = 0x82,
|
||||
@ -461,4 +508,111 @@ struct nvme_admin_cmd {
|
||||
#define NVME_IOCTL_ADMIN_CMD _IOWR('N', 0x41, struct nvme_admin_cmd)
|
||||
#define NVME_IOCTL_SUBMIT_IO _IOW('N', 0x42, struct nvme_user_io)
|
||||
|
||||
#ifdef __KERNEL__
|
||||
#include <linux/pci.h>
|
||||
#include <linux/miscdevice.h>
|
||||
#include <linux/kref.h>
|
||||
|
||||
#define NVME_IO_TIMEOUT (5 * HZ)
|
||||
|
||||
/*
|
||||
* Represents an NVM Express device. Each nvme_dev is a PCI function.
|
||||
*/
|
||||
struct nvme_dev {
|
||||
struct list_head node;
|
||||
struct nvme_queue **queues;
|
||||
u32 __iomem *dbs;
|
||||
struct pci_dev *pci_dev;
|
||||
struct dma_pool *prp_page_pool;
|
||||
struct dma_pool *prp_small_pool;
|
||||
int instance;
|
||||
int queue_count;
|
||||
int db_stride;
|
||||
u32 ctrl_config;
|
||||
struct msix_entry *entry;
|
||||
struct nvme_bar __iomem *bar;
|
||||
struct list_head namespaces;
|
||||
struct kref kref;
|
||||
struct miscdevice miscdev;
|
||||
char name[12];
|
||||
char serial[20];
|
||||
char model[40];
|
||||
char firmware_rev[8];
|
||||
u32 max_hw_sectors;
|
||||
u32 stripe_size;
|
||||
u16 oncs;
|
||||
};
|
||||
|
||||
/*
|
||||
* An NVM Express namespace is equivalent to a SCSI LUN
|
||||
*/
|
||||
struct nvme_ns {
|
||||
struct list_head list;
|
||||
|
||||
struct nvme_dev *dev;
|
||||
struct request_queue *queue;
|
||||
struct gendisk *disk;
|
||||
|
||||
int ns_id;
|
||||
int lba_shift;
|
||||
int ms;
|
||||
u64 mode_select_num_blocks;
|
||||
u32 mode_select_block_len;
|
||||
};
|
||||
|
||||
/*
|
||||
* The nvme_iod describes the data in an I/O, including the list of PRP
|
||||
* entries. You can't see it in this data structure because C doesn't let
|
||||
* me express that. Use nvme_alloc_iod to ensure there's enough space
|
||||
* allocated to store the PRP list.
|
||||
*/
|
||||
struct nvme_iod {
|
||||
void *private; /* For the use of the submitter of the I/O */
|
||||
int npages; /* In the PRP list. 0 means small pool in use */
|
||||
int offset; /* Of PRP list */
|
||||
int nents; /* Used in scatterlist */
|
||||
int length; /* Of data, in bytes */
|
||||
dma_addr_t first_dma;
|
||||
struct scatterlist sg[0];
|
||||
};
|
||||
|
||||
static inline u64 nvme_block_nr(struct nvme_ns *ns, sector_t sector)
|
||||
{
|
||||
return (sector >> (ns->lba_shift - 9));
|
||||
}
|
||||
|
||||
/**
|
||||
* nvme_free_iod - frees an nvme_iod
|
||||
* @dev: The device that the I/O was submitted to
|
||||
* @iod: The memory to free
|
||||
*/
|
||||
void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod);
|
||||
|
||||
int nvme_setup_prps(struct nvme_dev *dev, struct nvme_common_command *cmd,
|
||||
struct nvme_iod *iod, int total_len, gfp_t gfp);
|
||||
struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write,
|
||||
unsigned long addr, unsigned length);
|
||||
void nvme_unmap_user_pages(struct nvme_dev *dev, int write,
|
||||
struct nvme_iod *iod);
|
||||
struct nvme_queue *get_nvmeq(struct nvme_dev *dev);
|
||||
void put_nvmeq(struct nvme_queue *nvmeq);
|
||||
int nvme_submit_sync_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd,
|
||||
u32 *result, unsigned timeout);
|
||||
int nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns);
|
||||
int nvme_submit_admin_cmd(struct nvme_dev *, struct nvme_command *,
|
||||
u32 *result);
|
||||
int nvme_identify(struct nvme_dev *, unsigned nsid, unsigned cns,
|
||||
dma_addr_t dma_addr);
|
||||
int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
|
||||
dma_addr_t dma_addr, u32 *result);
|
||||
int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,
|
||||
dma_addr_t dma_addr, u32 *result);
|
||||
|
||||
struct sg_io_hdr;
|
||||
|
||||
int nvme_sg_io(struct nvme_ns *ns, struct sg_io_hdr __user *u_hdr);
|
||||
int nvme_sg_get_version_num(int __user *ip);
|
||||
|
||||
#endif
|
||||
|
||||
#endif /* _LINUX_NVME_H */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user