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Commit 3e8072d4 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge git://git.infradead.org/users/willy/linux-nvme 

Pull NVMe driver updates from Matthew Wilcox:
 "Various updates to the NVMe driver.  The most user-visible change is
  that drive hotplugging now works and CPU hotplug while an NVMe drive
  is installed should also work better"

* git://git.infradead.org/users/willy/linux-nvme:
  NVMe: Retry failed commands with non-fatal errors
  NVMe: Add getgeo to block ops
  NVMe: Start-stop nvme_thread during device add-remove.
  NVMe: Make I/O timeout a module parameter
  NVMe: CPU hot plug notification
  NVMe: per-cpu io queues
  NVMe: Replace DEFINE_PCI_DEVICE_TABLE
  NVMe: Fix divide-by-zero in nvme_trans_io_get_num_cmds
  NVMe: IOCTL path RCU protect queue access
  NVMe: RCU protected access to io queues
  NVMe: Initialize device reference count earlier
  NVMe: Add CONFIG_PM_SLEEP to suspend/resume functions
parents a63b747b edd10d33

drivers/block/nvme-core.c

+480 −204

File changed.

Preview size limit exceeded, changes collapsed.

drivers/block/nvme-scsi.c

+11 −32
Original line number Diff line number Diff line
@@ -1562,13 +1562,14 @@ static int nvme_trans_send_fw_cmd(struct nvme_ns *ns, struct sg_io_hdr *hdr, 
			res = PTR_ERR(iod);

			goto out;

		}

		length = nvme_setup_prps(dev, &c.common, iod, tot_len,

								GFP_KERNEL);

		length = nvme_setup_prps(dev, iod, tot_len, GFP_KERNEL);

		if (length != tot_len) {

			res = -ENOMEM;

			goto out_unmap;

		}



		c.dlfw.prp1 = cpu_to_le64(sg_dma_address(iod->sg));

		c.dlfw.prp2 = cpu_to_le64(iod->first_dma);

		c.dlfw.numd = cpu_to_le32((tot_len/BYTES_TO_DWORDS) - 1);

		c.dlfw.offset = cpu_to_le32(offset/BYTES_TO_DWORDS);

	} else if (opcode == nvme_admin_activate_fw) {
@@ -2033,7 +2034,6 @@ static int nvme_trans_do_nvme_io(struct nvme_ns *ns, struct sg_io_hdr *hdr, 
	int res = SNTI_TRANSLATION_SUCCESS;

	int nvme_sc;

	struct nvme_dev *dev = ns->dev;

	struct nvme_queue *nvmeq;

	u32 num_cmds;

	struct nvme_iod *iod;

	u64 unit_len;
@@ -2045,7 +2045,7 @@ static int nvme_trans_do_nvme_io(struct nvme_ns *ns, struct sg_io_hdr *hdr, 
	struct nvme_command c;

	u8 opcode = (is_write ? nvme_cmd_write : nvme_cmd_read);

	u16 control;

	u32 max_blocks = nvme_block_nr(ns, dev->max_hw_sectors);

	u32 max_blocks = queue_max_hw_sectors(ns->queue);



	num_cmds = nvme_trans_io_get_num_cmds(hdr, cdb_info, max_blocks);
@@ -2093,8 +2093,7 @@ static int nvme_trans_do_nvme_io(struct nvme_ns *ns, struct sg_io_hdr *hdr, 
			res = PTR_ERR(iod);

			goto out;

		}

		retcode = nvme_setup_prps(dev, &c.common, iod, unit_len,

							GFP_KERNEL);

		retcode = nvme_setup_prps(dev, iod, unit_len, GFP_KERNEL);

		if (retcode != unit_len) {

			nvme_unmap_user_pages(dev,

				(is_write) ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
@@ -2103,21 +2102,12 @@ static int nvme_trans_do_nvme_io(struct nvme_ns *ns, struct sg_io_hdr *hdr, 
			res = -ENOMEM;

			goto out;

		}

		c.rw.prp1 = cpu_to_le64(sg_dma_address(iod->sg));

		c.rw.prp2 = cpu_to_le64(iod->first_dma);



		nvme_offset += unit_num_blocks;



		nvmeq = get_nvmeq(dev);

		/*

		 * Since nvme_submit_sync_cmd sleeps, we can't keep

		 * preemption disabled.  We may be preempted at any

		 * point, and be rescheduled to a different CPU.  That

		 * will cause cacheline bouncing, but no additional

		 * races since q_lock already protects against other

		 * CPUs.

		 */

		put_nvmeq(nvmeq);

		nvme_sc = nvme_submit_sync_cmd(nvmeq, &c, NULL,

						NVME_IO_TIMEOUT);

		nvme_sc = nvme_submit_io_cmd(dev, &c, NULL);

		if (nvme_sc != NVME_SC_SUCCESS) {

			nvme_unmap_user_pages(dev,

				(is_write) ? DMA_TO_DEVICE : DMA_FROM_DEVICE,
@@ -2644,7 +2634,6 @@ static int nvme_trans_start_stop(struct nvme_ns *ns, struct sg_io_hdr *hdr, 
{

	int res = SNTI_TRANSLATION_SUCCESS;

	int nvme_sc;

	struct nvme_queue *nvmeq;

	struct nvme_command c;

	u8 immed, pcmod, pc, no_flush, start;
@@ -2671,10 +2660,7 @@ static int nvme_trans_start_stop(struct nvme_ns *ns, struct sg_io_hdr *hdr, 
			c.common.opcode = nvme_cmd_flush;

			c.common.nsid = cpu_to_le32(ns->ns_id);



			nvmeq = get_nvmeq(ns->dev);

			put_nvmeq(nvmeq);

			nvme_sc = nvme_submit_sync_cmd(nvmeq, &c, NULL, NVME_IO_TIMEOUT);



			nvme_sc = nvme_submit_io_cmd(ns->dev, &c, NULL);

			res = nvme_trans_status_code(hdr, nvme_sc);

			if (res)

				goto out;
@@ -2697,15 +2683,12 @@ static int nvme_trans_synchronize_cache(struct nvme_ns *ns, 
	int res = SNTI_TRANSLATION_SUCCESS;

	int nvme_sc;

	struct nvme_command c;

	struct nvme_queue *nvmeq;



	memset(&c, 0, sizeof(c));

	c.common.opcode = nvme_cmd_flush;

	c.common.nsid = cpu_to_le32(ns->ns_id);



	nvmeq = get_nvmeq(ns->dev);

	put_nvmeq(nvmeq);

	nvme_sc = nvme_submit_sync_cmd(nvmeq, &c, NULL, NVME_IO_TIMEOUT);

	nvme_sc = nvme_submit_io_cmd(ns->dev, &c, NULL);



	res = nvme_trans_status_code(hdr, nvme_sc);

	if (res)
@@ -2872,7 +2855,6 @@ static int nvme_trans_unmap(struct nvme_ns *ns, struct sg_io_hdr *hdr, 
	struct nvme_dev *dev = ns->dev;

	struct scsi_unmap_parm_list *plist;

	struct nvme_dsm_range *range;

	struct nvme_queue *nvmeq;

	struct nvme_command c;

	int i, nvme_sc, res = -ENOMEM;

	u16 ndesc, list_len;
@@ -2914,10 +2896,7 @@ static int nvme_trans_unmap(struct nvme_ns *ns, struct sg_io_hdr *hdr, 
	c.dsm.nr = cpu_to_le32(ndesc - 1);

	c.dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD);



	nvmeq = get_nvmeq(dev);

	put_nvmeq(nvmeq);



	nvme_sc = nvme_submit_sync_cmd(nvmeq, &c, NULL, NVME_IO_TIMEOUT);

	nvme_sc = nvme_submit_io_cmd(dev, &c, NULL);

	res = nvme_trans_status_code(hdr, nvme_sc);



	dma_free_coherent(&dev->pci_dev->dev, ndesc * sizeof(*range),

include/linux/nvme.h

+12 −9
Original line number Diff line number Diff line
@@ -66,20 +66,25 @@ enum { 


#define NVME_VS(major, minor)	(major << 16 | minor)



#define NVME_IO_TIMEOUT	(5 * HZ)

extern unsigned char io_timeout;

#define NVME_IO_TIMEOUT	(io_timeout * HZ)



/*

 * Represents an NVM Express device.  Each nvme_dev is a PCI function.

 */

struct nvme_dev {

	struct list_head node;

	struct nvme_queue **queues;

	struct nvme_queue __rcu **queues;

	unsigned short __percpu *io_queue;

	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;

	unsigned queue_count;

	unsigned online_queues;

	unsigned max_qid;

	int q_depth;

	u32 db_stride;

	u32 ctrl_config;

	struct msix_entry *entry;
@@ -89,6 +94,7 @@ struct nvme_dev { 
	struct miscdevice miscdev;

	work_func_t reset_workfn;

	struct work_struct reset_work;

	struct notifier_block nb;

	char name[12];

	char serial[20];

	char model[40];
@@ -131,6 +137,7 @@ struct nvme_iod { 
	int length;		/* Of data, in bytes */

	unsigned long start_time;

	dma_addr_t first_dma;

	struct list_head node;

	struct scatterlist sg[0];

};
@@ -146,16 +153,12 @@ static inline u64 nvme_block_nr(struct nvme_ns *ns, sector_t sector) 
 */

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);

int nvme_setup_prps(struct nvme_dev *, struct nvme_iod *, int , gfp_t);

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_io_cmd(struct nvme_dev *, struct nvme_command *, u32 *);

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);

include/uapi/linux/nvme.h

+1 −0
Original line number Diff line number Diff line
@@ -434,6 +434,7 @@ enum { 
	NVME_SC_REFTAG_CHECK		= 0x284,

	NVME_SC_COMPARE_FAILED		= 0x285,

	NVME_SC_ACCESS_DENIED		= 0x286,

	NVME_SC_DNR			= 0x4000,

};



struct nvme_completion {