nvme-core.c revision 68b8eca5f882230e4991df0db0a3094f49420a90
1b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 2b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * NVM Express device driver 3b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Copyright (c) 2011, Intel Corporation. 4b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 5b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * This program is free software; you can redistribute it and/or modify it 6b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * under the terms and conditions of the GNU General Public License, 7b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * version 2, as published by the Free Software Foundation. 8b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 9b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * This program is distributed in the hope it will be useful, but WITHOUT 10b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * more details. 13b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 14b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * You should have received a copy of the GNU General Public License along with 15b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * this program; if not, write to the Free Software Foundation, Inc., 16b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 17b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 18b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 19b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/nvme.h> 20b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/bio.h> 218de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox#include <linux/bitops.h> 22b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/blkdev.h> 23fd63e9ceeeae58cfe877c2d49d41c1bf7532303cMatthew Wilcox#include <linux/delay.h> 24b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/errno.h> 25b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/fs.h> 26b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/genhd.h> 275aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox#include <linux/idr.h> 28b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/init.h> 29b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/interrupt.h> 30b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/io.h> 31b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/kdev_t.h> 321fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox#include <linux/kthread.h> 33b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/kernel.h> 34b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/mm.h> 35b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/module.h> 36b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/moduleparam.h> 37b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/pci.h> 38be7b62754e097adc0cb16c25c9ee86ee20de62fbMatthew Wilcox#include <linux/poison.h> 39b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/sched.h> 40b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/slab.h> 41b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/types.h> 425d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma#include <scsi/sg.h> 43797a796a13df6b84a4791e57306737059b5b2384Hitoshi Mitake#include <asm-generic/io-64-nonatomic-lo-hi.h> 44797a796a13df6b84a4791e57306737059b5b2384Hitoshi Mitake 45b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define NVME_Q_DEPTH 1024 46b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define SQ_SIZE(depth) (depth * sizeof(struct nvme_command)) 47b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion)) 48b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define NVME_MINORS 64 49e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox#define ADMIN_TIMEOUT (60 * HZ) 50b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 51b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_major; 52b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_param(nvme_major, int, 0); 53b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 5458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic int use_threaded_interrupts; 5558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxmodule_param(use_threaded_interrupts, int, 0); 5658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 571fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic DEFINE_SPINLOCK(dev_list_lock); 581fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic LIST_HEAD(dev_list); 591fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic struct task_struct *nvme_thread; 601fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 61b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 62b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * An NVM Express queue. Each device has at least two (one for admin 63b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * commands and one for I/O commands). 64b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 65b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstruct nvme_queue { 66b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *q_dmadev; 67091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct nvme_dev *dev; 68b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spinlock_t q_lock; 69b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command *sq_cmds; 70b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox volatile struct nvme_completion *cqes; 71b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t sq_dma_addr; 72b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t cq_dma_addr; 73b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wait_queue_head_t sq_full; 741fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox wait_queue_t sq_cong_wait; 75b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio_list sq_cong; 76b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 __iomem *q_db; 77b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 q_depth; 78b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 cq_vector; 79b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 sq_head; 80b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 sq_tail; 81b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 cq_head; 82821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox u16 cq_phase; 83b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long cmdid_data[]; 84b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 85b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 86b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 87b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Check we didin't inadvertently grow the command struct 88b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 89b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic inline void _nvme_check_size(void) 90b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 91b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); 92b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); 93b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); 94b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); 95b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_features) != 64); 96f8ebf8409abfdaeeb8c847381629a2a8b8e3d816Vishal Verma BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); 97b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_command) != 64); 98b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096); 99b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096); 100b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); 1016ecec74520d8a357726e6c12f99080dbe7b347ddKeith Busch BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); 102b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 103b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1045c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxtypedef void (*nvme_completion_fn)(struct nvme_dev *, void *, 105c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *); 106c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 107e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstruct nvme_cmd_info { 108c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 109c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 110e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox unsigned long timeout; 111e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox}; 112e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 113e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstatic struct nvme_cmd_info *nvme_cmd_info(struct nvme_queue *nvmeq) 114e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox{ 115e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return (void *)&nvmeq->cmdid_data[BITS_TO_LONGS(nvmeq->q_depth)]; 116e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox} 117e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 118b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 119714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * alloc_cmdid() - Allocate a Command ID 120714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @nvmeq: The queue that will be used for this command 121714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @ctx: A pointer that will be passed to the handler 122c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox * @handler: The function to call on completion 123b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 124b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Allocate a Command ID for a queue. The data passed in will 125b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * be passed to the completion handler. This is implemented by using 126b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the bottom two bits of the ctx pointer to store the handler ID. 127b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Passing in a pointer that's not 4-byte aligned will cause a BUG. 128b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * We can change this if it becomes a problem. 129184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * 130184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * May be called with local interrupts disabled and the q_lock held, 131184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * or with interrupts enabled and no locks held. 132b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 133c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic int alloc_cmdid(struct nvme_queue *nvmeq, void *ctx, 134c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 135b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 136e6d15f79f997a98b3a69abbc462fc9041cc1a7b4Matthew Wilcox int depth = nvmeq->q_depth - 1; 137e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 138b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 139b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 140b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox do { 141b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdid = find_first_zero_bit(nvmeq->cmdid_data, depth); 142b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid >= depth) 143b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EBUSY; 144b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } while (test_and_set_bit(cmdid, nvmeq->cmdid_data)); 145b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 146c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = handler; 147c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].ctx = ctx; 148e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].timeout = jiffies + timeout; 149b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 150b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 151b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 152b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int alloc_cmdid_killable(struct nvme_queue *nvmeq, void *ctx, 153c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 154b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 155b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 156b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wait_event_killable(nvmeq->sq_full, 157e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox (cmdid = alloc_cmdid(nvmeq, ctx, handler, timeout)) >= 0); 158b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return (cmdid < 0) ? -EINTR : cmdid; 159b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 160b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 161c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox/* Special values must be less than 0x1000 */ 162c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox#define CMD_CTX_BASE ((void *)POISON_POINTER_DELTA) 163d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_CANCELLED (0x30C + CMD_CTX_BASE) 164d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_COMPLETED (0x310 + CMD_CTX_BASE) 165d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_INVALID (0x314 + CMD_CTX_BASE) 16600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox#define CMD_CTX_FLUSH (0x318 + CMD_CTX_BASE) 167be7b62754e097adc0cb16c25c9ee86ee20de62fbMatthew Wilcox 1685c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void special_completion(struct nvme_dev *dev, void *ctx, 169c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 170c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 171c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_CANCELLED) 172c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 173c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_FLUSH) 174c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 175c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_COMPLETED) { 1765c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, 177c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "completed id %d twice on queue %d\n", 178c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 179c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 180c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 181c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_INVALID) { 1825c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, 183c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "invalid id %d completed on queue %d\n", 184c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 185c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 186c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 187c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 1885c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, "Unknown special completion %p\n", ctx); 189c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 190c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 191184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 192184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 193184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 194c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *free_cmdid(struct nvme_queue *nvmeq, int cmdid, 195c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 196b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 197c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 198e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 199b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 200c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (cmdid >= nvmeq->q_depth) { 201c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = special_completion; 20248e3d39816416b3bf03dee3a796c0c04427c1a31Matthew Wilcox return CMD_CTX_INVALID; 203c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 204859361a228258edf4821d9f5635825033eca78e8Keith Busch if (fn) 205859361a228258edf4821d9f5635825033eca78e8Keith Busch *fn = info[cmdid].fn; 206c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 207c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 208e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_COMPLETED; 209b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox clear_bit(cmdid, nvmeq->cmdid_data); 210b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wake_up(&nvmeq->sq_full); 211c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 212b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 213b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 214c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *cancel_cmdid(struct nvme_queue *nvmeq, int cmdid, 215c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 2163c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 217c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 218e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 219c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (fn) 220c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = info[cmdid].fn; 221c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 222c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 223e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_CANCELLED; 224c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 2253c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 2263c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 2275d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermastruct nvme_queue *get_nvmeq(struct nvme_dev *dev) 228b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 229040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox return dev->queues[get_cpu() + 1]; 230b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 231b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2325d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid put_nvmeq(struct nvme_queue *nvmeq) 233b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2341b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox put_cpu(); 235b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 236b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 237b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 238714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * nvme_submit_cmd() - Copy a command into a queue and ring the doorbell 239b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @nvmeq: The queue to use 240b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @cmd: The command to send 241b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 242b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Safe to use from interrupt context 243b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 244b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd) 245b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 246b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long flags; 247b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 tail; 248b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_irqsave(&nvmeq->q_lock, flags); 249b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = nvmeq->sq_tail; 250b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); 251b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++tail == nvmeq->q_depth) 252b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = 0; 2537547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(tail, nvmeq->q_db); 254b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = tail; 255b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_unlock_irqrestore(&nvmeq->q_lock, flags); 256b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 257b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 258b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 259b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 260eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic __le64 **iod_list(struct nvme_iod *iod) 261e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews{ 262eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ((void *)iod) + iod->offset; 263e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews} 264e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 265eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox/* 266eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * Will slightly overestimate the number of pages needed. This is OK 267eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * as it only leads to a small amount of wasted memory for the lifetime of 268eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * the I/O. 269eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox */ 270eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic int nvme_npages(unsigned size) 271eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox{ 272eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned nprps = DIV_ROUND_UP(size + PAGE_SIZE, PAGE_SIZE); 273eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); 274eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox} 275b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 276eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic struct nvme_iod * 277eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxnvme_alloc_iod(unsigned nseg, unsigned nbytes, gfp_t gfp) 278b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 279eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = kmalloc(sizeof(struct nvme_iod) + 280eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(__le64 *) * nvme_npages(nbytes) + 281eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(struct scatterlist) * nseg, gfp); 282eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 283eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod) { 284eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->offset = offsetof(struct nvme_iod, sg[nseg]); 285eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 286eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->length = nbytes; 2872b1960341576bf51c01b12fefeb1cc53820923e7Keith Busch iod->nents = 0; 288eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 289eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 290eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 291b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 292b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2935d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod) 294b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 295eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox const int last_prp = PAGE_SIZE / 8 - 1; 296eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int i; 297eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 298eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t prp_dma = iod->first_dma; 299eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 300eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod->npages == 0) 301eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_small_pool, list[0], prp_dma); 302eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox for (i = 0; i < iod->npages; i++) { 303eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 *prp_list = list[i]; 304eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t next_prp_dma = le64_to_cpu(prp_list[last_prp]); 305eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); 306eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox prp_dma = next_prp_dma; 307eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 308eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 309b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 310b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3115c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void requeue_bio(struct nvme_dev *dev, struct bio *bio) 3125c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox{ 3135c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox struct nvme_queue *nvmeq = get_nvmeq(dev); 3145c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 3155c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 3165c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox bio_list_add(&nvmeq->sq_cong, bio); 3175c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox put_nvmeq(nvmeq); 3185c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox wake_up_process(nvme_thread); 3195c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox} 3205c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox 3215c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void bio_completion(struct nvme_dev *dev, void *ctx, 322b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion *cqe) 323b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 324eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = ctx; 325eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct bio *bio = iod->private; 326b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 status = le16_to_cpup(&cqe->status) >> 1; 327b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3282b1960341576bf51c01b12fefeb1cc53820923e7Keith Busch if (iod->nents) 3292b1960341576bf51c01b12fefeb1cc53820923e7Keith Busch dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 330b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_data_dir(bio) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 331eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 33209a58f536436efed02ead722e835cb4ce7674afcMatthew Wilcox if (status) { 3331ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, -EIO); 33409a58f536436efed02ead722e835cb4ce7674afcMatthew Wilcox } else if (bio->bi_vcnt > bio->bi_idx) { 3355c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox requeue_bio(dev, bio); 3361ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox } else { 3371ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, 0); 3381ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox } 339b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 340b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 341184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* length is in bytes. gfp flags indicates whether we may sleep. */ 3425d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_setup_prps(struct nvme_dev *dev, struct nvme_common_command *cmd, 3435d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma struct nvme_iod *iod, int total_len, gfp_t gfp) 344ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox{ 34599802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox struct dma_pool *pool; 346eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int length = total_len; 347eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct scatterlist *sg = iod->sg; 348ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int dma_len = sg_dma_len(sg); 349ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox u64 dma_addr = sg_dma_address(sg); 350ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int offset = offset_in_page(dma_addr); 351e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *prp_list; 352eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 353e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr_t prp_dma; 354eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int nprps, i; 355ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 356ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmd->prp1 = cpu_to_le64(dma_addr); 357ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox length -= (PAGE_SIZE - offset); 358ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= 0) 359eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 360ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 361ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len -= (PAGE_SIZE - offset); 362ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (dma_len) { 363ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr += (PAGE_SIZE - offset); 364ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } else { 365ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox sg = sg_next(sg); 366ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr = sg_dma_address(sg); 367ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len = sg_dma_len(sg); 368ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 369ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 370ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= PAGE_SIZE) { 371ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmd->prp2 = cpu_to_le64(dma_addr); 372eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 373e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 374e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 375e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews nprps = DIV_ROUND_UP(length, PAGE_SIZE); 37699802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (nprps <= (256 / 8)) { 37799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_small_pool; 378eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 0; 37999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } else { 38099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_page_pool; 381eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 1; 38299802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 38399802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 384b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 385b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (!prp_list) { 386b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox cmd->prp2 = cpu_to_le64(dma_addr); 387eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 388eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return (total_len - length) + PAGE_SIZE; 389b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox } 390eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[0] = prp_list; 391eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->first_dma = prp_dma; 392e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews cmd->prp2 = cpu_to_le64(prp_dma); 393e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews i = 0; 394e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews for (;;) { 3957523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox if (i == PAGE_SIZE / 8) { 396e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *old_prp_list = prp_list; 397b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 398eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!prp_list) 399eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len - length; 400eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[iod->npages++] = prp_list; 4017523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox prp_list[0] = old_prp_list[i - 1]; 4027523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox old_prp_list[i - 1] = cpu_to_le64(prp_dma); 4037523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox i = 1; 404e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 405e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews prp_list[i++] = cpu_to_le64(dma_addr); 406e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len -= PAGE_SIZE; 407e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr += PAGE_SIZE; 408e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews length -= PAGE_SIZE; 409e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (length <= 0) 410e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews break; 411e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (dma_len > 0) 412e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews continue; 413e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews BUG_ON(dma_len < 0); 414e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews sg = sg_next(sg); 415e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr = sg_dma_address(sg); 416e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len = sg_dma_len(sg); 417ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 418ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 419eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 420ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox} 421ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 4221ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox/* NVMe scatterlists require no holes in the virtual address */ 4231ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox#define BIOVEC_NOT_VIRT_MERGEABLE(vec1, vec2) ((vec2)->bv_offset || \ 4241ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox (((vec1)->bv_offset + (vec1)->bv_len) % PAGE_SIZE)) 4251ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox 426eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic int nvme_map_bio(struct device *dev, struct nvme_iod *iod, 427b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio, enum dma_data_direction dma_dir, int psegs) 428b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 429768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox struct bio_vec *bvec, *bvprv = NULL; 430768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox struct scatterlist *sg = NULL; 4311ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox int i, old_idx, length = 0, nsegs = 0; 432b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 433eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg_init_table(iod->sg, psegs); 4341ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox old_idx = bio->bi_idx; 435b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_for_each_segment(bvec, bio, i) { 436768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox if (bvprv && BIOVEC_PHYS_MERGEABLE(bvprv, bvec)) { 437768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg->length += bvec->bv_len; 438768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } else { 4391ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox if (bvprv && BIOVEC_NOT_VIRT_MERGEABLE(bvprv, bvec)) 4401ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox break; 441eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = sg ? sg + 1 : iod->sg; 442768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_set_page(sg, bvec->bv_page, bvec->bv_len, 443768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvec->bv_offset); 444768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox nsegs++; 445768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } 4461ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox length += bvec->bv_len; 447768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvprv = bvec; 448b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 4491ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio->bi_idx = i; 450eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->nents = nsegs; 451768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_mark_end(sg); 452eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (dma_map_sg(dev, iod->sg, iod->nents, dma_dir) == 0) { 4531ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio->bi_idx = old_idx; 4541ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return -ENOMEM; 4551ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox } 4561ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return length; 457b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 458b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 4590e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch/* 4600e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * We reuse the small pool to allocate the 16-byte range here as it is not 4610e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * worth having a special pool for these or additional cases to handle freeing 4620e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * the iod. 4630e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch */ 4640e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic int nvme_submit_discard(struct nvme_queue *nvmeq, struct nvme_ns *ns, 4650e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct bio *bio, struct nvme_iod *iod, int cmdid) 4660e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 4670e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct nvme_dsm_range *range; 4680e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 4690e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 4700e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range = dma_pool_alloc(nvmeq->dev->prp_small_pool, GFP_ATOMIC, 4710e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch &iod->first_dma); 4720e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (!range) 4730e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return -ENOMEM; 4740e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 4750e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch iod_list(iod)[0] = (__le64 *)range; 4760e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch iod->npages = 0; 4770e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 4780e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range->cattr = cpu_to_le32(0); 4790e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range->nlb = cpu_to_le32(bio->bi_size >> ns->lba_shift); 480063cc6d5591ea9c0631b81ac5c7b829d99738b2fMatthew Wilcox range->slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_sector)); 4810e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 4820e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch memset(cmnd, 0, sizeof(*cmnd)); 4830e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.opcode = nvme_cmd_dsm; 4840e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.command_id = cmdid; 4850e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nsid = cpu_to_le32(ns->ns_id); 4860e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.prp1 = cpu_to_le64(iod->first_dma); 4870e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nr = 0; 4880e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); 4890e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 4900e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (++nvmeq->sq_tail == nvmeq->q_depth) 4910e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvmeq->sq_tail = 0; 4920e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch writel(nvmeq->sq_tail, nvmeq->q_db); 4930e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 4940e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return 0; 4950e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 4960e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 49700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcoxstatic int nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns, 49800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid) 49900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 50000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 50100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 50200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 50300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.opcode = nvme_cmd_flush; 50400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.command_id = cmdid; 50500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.nsid = cpu_to_le32(ns->ns_id); 50600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 50700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 50800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox nvmeq->sq_tail = 0; 50900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 51000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 51100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return 0; 51200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 51300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 5145d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns) 51500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 51600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid = alloc_cmdid(nvmeq, (void *)CMD_CTX_FLUSH, 517ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox special_completion, NVME_IO_TIMEOUT); 51800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (unlikely(cmdid < 0)) 51900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return cmdid; 52000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 52100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 52200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 52300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 524184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 525184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 526184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 527b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns, 528b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio) 529b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 530ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox struct nvme_command *cmnd; 531eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 532b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox enum dma_data_direction dma_dir; 5331ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox int cmdid, length, result = -ENOMEM; 534b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 control; 535b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 dsmgmt; 536b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int psegs = bio_phys_segments(ns->queue, bio); 537b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 53800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && psegs) { 53900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox result = nvme_submit_flush_data(nvmeq, ns); 54000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (result) 54100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return result; 54200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox } 54300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 544eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(psegs, bio->bi_size, GFP_ATOMIC); 545eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!iod) 546eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox goto nomem; 547eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->private = bio; 548b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 549eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox result = -EBUSY; 550ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox cmdid = alloc_cmdid(nvmeq, iod, bio_completion, NVME_IO_TIMEOUT); 551b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (unlikely(cmdid < 0)) 552eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 553b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 5540e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (bio->bi_rw & REQ_DISCARD) { 5550e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch result = nvme_submit_discard(nvmeq, ns, bio, iod, cmdid); 5560e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (result) 5570e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch goto free_cmdid; 5580e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return result; 5590e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch } 56000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && !psegs) 56100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 56200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 563b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control = 0; 564b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_FUA) 565b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_FUA; 566b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & (REQ_FAILFAST_DEV | REQ_RAHEAD)) 567b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_LR; 568b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 569b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt = 0; 570b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_RAHEAD) 571b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; 572b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 573ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 574b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 575b8deb62cf271fa9381edc8cf52bcae2f0225c55aMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 576b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio_data_dir(bio)) { 577ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_write; 578b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_TO_DEVICE; 579b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } else { 580ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_read; 581b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_FROM_DEVICE; 582b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 583b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 584eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox result = nvme_map_bio(nvmeq->q_dmadev, iod, bio, dma_dir, psegs); 5851ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox if (result < 0) 586859361a228258edf4821d9f5635825033eca78e8Keith Busch goto free_cmdid; 5871ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox length = result; 588b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 589ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.command_id = cmdid; 590ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.nsid = cpu_to_le32(ns->ns_id); 591eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(nvmeq->dev, &cmnd->common, iod, length, 592eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_ATOMIC); 593063cc6d5591ea9c0631b81ac5c7b829d99738b2fMatthew Wilcox cmnd->rw.slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_sector)); 5941ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox cmnd->rw.length = cpu_to_le16((length >> ns->lba_shift) - 1); 595ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.control = cpu_to_le16(control); 596ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); 597b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 598d8ee9d69f275769aaad40ef7c944565ff8d2d24fMatthew Wilcox bio->bi_sector += length >> 9; 599d8ee9d69f275769aaad40ef7c944565ff8d2d24fMatthew Wilcox 600b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 601b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = 0; 6027547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 603b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 6041974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox return 0; 6051974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox 606859361a228258edf4821d9f5635825033eca78e8Keith Busch free_cmdid: 607859361a228258edf4821d9f5635825033eca78e8Keith Busch free_cmdid(nvmeq, cmdid, NULL); 608eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 609eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(nvmeq->dev, iod); 610eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox nomem: 611eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox return result; 612b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 613b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 61493c3d65b28bab6da520c2add9cb387a0303f8b2dLinus Torvaldsstatic void nvme_make_request(struct request_queue *q, struct bio *bio) 615b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 616b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = q->queuedata; 617040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox struct nvme_queue *nvmeq = get_nvmeq(ns->dev); 618eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox int result = -EBUSY; 619eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox 620eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 621eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 622eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox result = nvme_submit_bio_queue(nvmeq, ns, bio); 623eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (unlikely(result)) { 624eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 625eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 626b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_add(&nvmeq->sq_cong, bio); 627b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 628eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox 629eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 630b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox put_nvmeq(nvmeq); 631b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 632b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 633b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_process_cq(struct nvme_queue *nvmeq) 634b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 635821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox u16 head, phase; 636b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 637b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = nvmeq->cq_head; 638821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = nvmeq->cq_phase; 639b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 640b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (;;) { 641c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 642c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 643b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion cqe = nvmeq->cqes[head]; 644821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != phase) 645b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox break; 646b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_head = le16_to_cpu(cqe.sq_head); 647b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++head == nvmeq->q_depth) { 648b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = 0; 649821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = !phase; 650b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 651b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 652c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = free_cmdid(nvmeq, cqe.command_id, &fn); 6535c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox fn(nvmeq->dev, ctx, &cqe); 654b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 655b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 656b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* If the controller ignores the cq head doorbell and continuously 657b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * writes to the queue, it is theoretically possible to wrap around 658b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the queue twice and mistakenly return IRQ_NONE. Linux only 659b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * requires that 0.1% of your interrupts are handled, so this isn't 660b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * a big problem. 661b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 662821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) 663b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return IRQ_NONE; 664b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 665f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox writel(head, nvmeq->q_db + (1 << nvmeq->dev->db_stride)); 666b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = head; 667821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = phase; 668b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 669b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return IRQ_HANDLED; 670b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 671b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 672b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_irq(int irq, void *data) 673b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 67458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox irqreturn_t result; 67558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 67658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_lock(&nvmeq->q_lock); 67758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox result = nvme_process_cq(nvmeq); 67858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_unlock(&nvmeq->q_lock); 67958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return result; 68058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 68158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 68258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic irqreturn_t nvme_irq_check(int irq, void *data) 68358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox{ 68458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 68558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; 68658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) 68758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_NONE; 68858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_WAKE_THREAD; 68958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 69058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 6913c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcoxstatic void nvme_abort_command(struct nvme_queue *nvmeq, int cmdid) 6923c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 6933c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 694c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cancel_cmdid(nvmeq, cmdid, NULL); 6953c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 6963c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 6973c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 698c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstruct sync_cmd_info { 699c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct task_struct *task; 700c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox u32 result; 701c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox int status; 702c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox}; 703c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 7045c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void sync_completion(struct nvme_dev *dev, void *ctx, 705c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 706c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 707c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct sync_cmd_info *cmdinfo = ctx; 708c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->result = le32_to_cpup(&cqe->result); 709c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; 710c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox wake_up_process(cmdinfo->task); 711c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 712c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 713b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 714b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Returns 0 on success. If the result is negative, it's a Linux error code; 715b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * if the result is positive, it's an NVM Express status code 716b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 7175d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_sync_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd, 7185d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma u32 *result, unsigned timeout) 719b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 720b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 721b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct sync_cmd_info cmdinfo; 722b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 723b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.task = current; 724b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.status = -EINTR; 725b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 726c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdid = alloc_cmdid_killable(nvmeq, &cmdinfo, sync_completion, 727e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox timeout); 728b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid < 0) 729b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 730b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmd->common.command_id = cmdid; 731b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7323c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox set_current_state(TASK_KILLABLE); 7333c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_submit_cmd(nvmeq, cmd); 734b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox schedule(); 735b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7363c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox if (cmdinfo.status == -EINTR) { 7373c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_abort_command(nvmeq, cmdid); 7383c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox return -EINTR; 7393c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox } 7403c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 741b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 742b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox *result = cmdinfo.result; 743b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 744b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdinfo.status; 745b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 746b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7475d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd, 748b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 *result) 749b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 750e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return nvme_submit_sync_cmd(dev->queues[0], cmd, result, ADMIN_TIMEOUT); 751b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 752b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 753b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) 754b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 755b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 756b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 757b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 758b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 759b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.opcode = opcode; 760b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.qid = cpu_to_le16(id); 761b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 762b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 763b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 764b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 765b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 766b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 767b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 768b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, 769b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 770b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 771b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 772b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 773b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; 774b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 775b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 776b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.opcode = nvme_admin_create_cq; 777b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); 778b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cqid = cpu_to_le16(qid); 779b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 780b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cq_flags = cpu_to_le16(flags); 781b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); 782b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 783b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 784b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 785b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 786b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 787b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 788b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 789b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, 790b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 791b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 792b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 793b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 794b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; 795b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 796b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 797b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.opcode = nvme_admin_create_sq; 798b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); 799b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sqid = cpu_to_le16(qid); 800b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 801b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sq_flags = cpu_to_le16(flags); 802b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.cqid = cpu_to_le16(qid); 803b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 804b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 805b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 806b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 807b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 808b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 809b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 810b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) 811b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 812b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); 813b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 814b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 815b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) 816b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 817b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); 818b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 819b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8205d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns, 821bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox dma_addr_t dma_addr) 822bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 823bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 824bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 825bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 826bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.opcode = nvme_admin_identify; 827bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.nsid = cpu_to_le32(nsid); 828bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.prp1 = cpu_to_le64(dma_addr); 829bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.cns = cpu_to_le32(cns); 830bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 831bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, NULL); 832bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 833bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 8345d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid, 83508df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr_t dma_addr, u32 *result) 836bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 837bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 838bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 839bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 840bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.opcode = nvme_admin_get_features; 841a42ceccef0c43b46ff6bc1b12a7c1076ef243df1Keith Busch c.features.nsid = cpu_to_le32(nsid); 842bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 843bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.fid = cpu_to_le32(fid); 844bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 84508df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch return nvme_submit_admin_cmd(dev, &c, result); 846df3481399042200792822b6243e36a95a557b57eMatthew Wilcox} 847df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 8485d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11, 8495d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma dma_addr_t dma_addr, u32 *result) 850df3481399042200792822b6243e36a95a557b57eMatthew Wilcox{ 851df3481399042200792822b6243e36a95a557b57eMatthew Wilcox struct nvme_command c; 852df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 853df3481399042200792822b6243e36a95a557b57eMatthew Wilcox memset(&c, 0, sizeof(c)); 854df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.opcode = nvme_admin_set_features; 855df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 856df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.fid = cpu_to_le32(fid); 857df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.dword11 = cpu_to_le32(dword11); 858df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 859bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, result); 860bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 861bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 862a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox/** 863a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * nvme_cancel_ios - Cancel outstanding I/Os 864a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @queue: The queue to cancel I/Os on 865a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @timeout: True to only cancel I/Os which have timed out 866a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox */ 867a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcoxstatic void nvme_cancel_ios(struct nvme_queue *nvmeq, bool timeout) 868a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox{ 869a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int depth = nvmeq->q_depth - 1; 870a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 871a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox unsigned long now = jiffies; 872a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int cmdid; 873a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 874a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox for_each_set_bit(cmdid, nvmeq->cmdid_data, depth) { 875a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox void *ctx; 876a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_completion_fn fn; 877a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox static struct nvme_completion cqe = { 878af2d9ca744af5e03390eeb3864d08ce75c860899Matthew Wilcox .status = cpu_to_le16(NVME_SC_ABORT_REQ << 1), 879a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox }; 880a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 881a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox if (timeout && !time_after(now, info[cmdid].timeout)) 882a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox continue; 883a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox dev_warn(nvmeq->q_dmadev, "Cancelling I/O %d\n", cmdid); 884a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox ctx = cancel_cmdid(nvmeq, cmdid, &fn); 885a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox fn(nvmeq->dev, ctx, &cqe); 886a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox } 887a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox} 888a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 8899e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcoxstatic void nvme_free_queue_mem(struct nvme_queue *nvmeq) 8909e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox{ 8919e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 8929e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 8939e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 8949e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 8959e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox kfree(nvmeq); 8969e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox} 8979e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 898b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_free_queue(struct nvme_dev *dev, int qid) 899b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 900b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = dev->queues[qid]; 901aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox int vector = dev->entry[nvmeq->cq_vector].vector; 902b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 903a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 904a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_cancel_ios(nvmeq, false); 9053295874b6074d749516d6decd43afad7bf6e38ffKeith Busch while (bio_list_peek(&nvmeq->sq_cong)) { 9063295874b6074d749516d6decd43afad7bf6e38ffKeith Busch struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 9073295874b6074d749516d6decd43afad7bf6e38ffKeith Busch bio_endio(bio, -EIO); 9083295874b6074d749516d6decd43afad7bf6e38ffKeith Busch } 909a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 910a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 911aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox irq_set_affinity_hint(vector, NULL); 912aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox free_irq(vector, nvmeq); 913b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 914b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* Don't tell the adapter to delete the admin queue */ 915b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (qid) { 916b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 917b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 918b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 919b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9209e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox nvme_free_queue_mem(nvmeq); 921b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 922b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 923b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, 924b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int depth, int vector) 925b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 926b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 927a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch unsigned extra = DIV_ROUND_UP(depth, 8) + (depth * 928a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch sizeof(struct nvme_cmd_info)); 929b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq) + extra, GFP_KERNEL); 930b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq) 931b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 932b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 933b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cqes = dma_alloc_coherent(dmadev, CQ_SIZE(depth), 934b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->cq_dma_addr, GFP_KERNEL); 935b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->cqes) 936b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 937b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset((void *)nvmeq->cqes, 0, CQ_SIZE(depth)); 938b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 939b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds = dma_alloc_coherent(dmadev, SQ_SIZE(depth), 940b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->sq_dma_addr, GFP_KERNEL); 941b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->sq_cmds) 942b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_cqdma; 943b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 944b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_dmadev = dmadev; 945091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvmeq->dev = dev; 946b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_init(&nvmeq->q_lock); 947b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = 0; 948821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = 1; 949b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox init_waitqueue_head(&nvmeq->sq_full); 9501fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox init_waitqueue_entry(&nvmeq->sq_cong_wait, nvme_thread); 951b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_init(&nvmeq->sq_cong); 952f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox nvmeq->q_db = &dev->dbs[qid << (dev->db_stride + 1)]; 953b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_depth = depth; 954b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_vector = vector; 955b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 956b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 957b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 958b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_cqdma: 95968b8eca5f882230e4991df0db0a3094f49420a90Keith Busch dma_free_coherent(dmadev, CQ_SIZE(depth), (void *)nvmeq->cqes, 960b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_dma_addr); 961b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 962b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 963b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 964b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 965b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9663001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcoxstatic int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, 9673001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox const char *name) 9683001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox{ 96958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if (use_threaded_interrupts) 97058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, 971ec6ce618d65b5ce1bef83a5509255107a0feac44Matthew Wilcox nvme_irq_check, nvme_irq, 97258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox IRQF_DISABLED | IRQF_SHARED, 97358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox name, nvmeq); 9743001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, 9753001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox IRQF_DISABLED | IRQF_SHARED, name, nvmeq); 9763001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox} 9773001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox 9788d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic struct nvme_queue *nvme_create_queue(struct nvme_dev *dev, int qid, 9798d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartman int cq_size, int vector) 980b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 981b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int result; 982b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = nvme_alloc_queue(dev, qid, cq_size, vector); 983b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9843f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox if (!nvmeq) 9856f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return ERR_PTR(-ENOMEM); 9863f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox 987b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_cq(dev, qid, nvmeq); 988b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 989b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 990b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 991b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_sq(dev, qid, nvmeq); 992b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 993b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_cq; 994b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9953001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme"); 996b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 997b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_sq; 998b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 999b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 1000b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1001b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_sq: 1002b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 1003b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_cq: 1004b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 1005b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 1006b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 1007b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 1008b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 1009b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 1010b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 10116f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return ERR_PTR(result); 1012b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1013b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10148d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_configure_admin_queue(struct nvme_dev *dev) 1015b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 10169e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox int result = 0; 1017b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 aqa; 101822605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox u64 cap; 101922605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox unsigned long timeout; 1020b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq; 1021b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1022b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 1023b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1024b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq = nvme_alloc_queue(dev, 0, 64, 0); 10253f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox if (!nvmeq) 10263f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox return -ENOMEM; 1027b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1028b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa = nvmeq->q_depth - 1; 1029b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa |= aqa << 16; 1030b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1031b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config = NVME_CC_ENABLE | NVME_CC_CSS_NVM; 1032b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= (PAGE_SHIFT - 12) << NVME_CC_MPS_SHIFT; 1033b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; 10347f53f9d2424533256ae86f7df5661a17de743de8Matthew Wilcox dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; 1035b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10365911f20039ce59d7e7834f0c42151cf759b6f786Shane Michael Matthews writel(0, &dev->bar->cc); 1037b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(aqa, &dev->bar->aqa); 1038b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->sq_dma_addr, &dev->bar->asq); 1039b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->cq_dma_addr, &dev->bar->acq); 1040b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(dev->ctrl_config, &dev->bar->cc); 1041b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 104222605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox cap = readq(&dev->bar->cap); 104322605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; 1044f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->db_stride = NVME_CAP_STRIDE(cap); 104522605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox 10469e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox while (!result && !(readl(&dev->bar->csts) & NVME_CSTS_RDY)) { 1047b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox msleep(100); 1048b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (fatal_signal_pending(current)) 10499e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox result = -EINTR; 105022605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox if (time_after(jiffies, timeout)) { 105122605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox dev_err(&dev->pci_dev->dev, 105222605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox "Device not ready; aborting initialisation\n"); 10539e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox result = -ENODEV; 105422605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox } 1055b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1056b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1057025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch if (result) 1058025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch goto free_q; 10599e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 10603001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme admin"); 1061025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch if (result) 1062025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch goto free_q; 1063025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch 1064b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->queues[0] = nvmeq; 1065b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1066025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch 1067025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch free_q: 1068025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch nvme_free_queue_mem(nvmeq); 1069025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch return result; 1070b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1071b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10725d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermastruct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write, 1073eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned long addr, unsigned length) 1074b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 107536c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox int i, err, count, nents, offset; 10767fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct scatterlist *sg; 10777fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct page **pages; 1078eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 107936c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 108036c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (addr & 3) 1081eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 10827fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox if (!length) 1083eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 10847fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 108536c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox offset = offset_in_page(addr); 10867fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox count = DIV_ROUND_UP(offset + length, PAGE_SIZE); 10877fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox pages = kcalloc(count, sizeof(*pages), GFP_KERNEL); 108822fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter if (!pages) 108922fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter return ERR_PTR(-ENOMEM); 109036c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 109136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = get_user_pages_fast(addr, count, 1, pages); 109236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (err < count) { 109336c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox count = err; 109436c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = -EFAULT; 109536c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox goto put_pages; 109636c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox } 10977fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 1098eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(count, length, GFP_KERNEL); 1099eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = iod->sg; 110036c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox sg_init_table(sg, count); 1101d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox for (i = 0; i < count; i++) { 1102d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox sg_set_page(&sg[i], pages[i], 1103d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox min_t(int, length, PAGE_SIZE - offset), offset); 1104d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox length -= (PAGE_SIZE - offset); 1105d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox offset = 0; 11067fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox } 1107fe304c43c6d63e29ed4fc46a874d7a74313788c5Matthew Wilcox sg_mark_end(&sg[i - 1]); 11081c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox iod->nents = count; 11097fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 11107fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox err = -ENOMEM; 11117fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox nents = dma_map_sg(&dev->pci_dev->dev, sg, count, 11127fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 111336c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (!nents) 1114eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 1115b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 11167fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1117eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 1118b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1119eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 1120eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 11217fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_pages: 11227fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox for (i = 0; i < count; i++) 11237fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_page(pages[i]); 11247fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1125eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(err); 11267fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1127b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 11285d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid nvme_unmap_user_pages(struct nvme_dev *dev, int write, 11291c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox struct nvme_iod *iod) 11307fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox{ 11311c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox int i; 1132b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 11331c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 11341c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 11357fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 11361c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox for (i = 0; i < iod->nents; i++) 11371c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox put_page(sg_page(&iod->sg[i])); 11387fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1139b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1140a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcoxstatic int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) 1141a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox{ 1142a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_dev *dev = ns->dev; 1143a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_queue *nvmeq; 1144a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_user_io io; 1145a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_command c; 1146a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox unsigned length; 1147eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int status; 1148eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 1149a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1150a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox if (copy_from_user(&io, uio, sizeof(io))) 1151a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return -EFAULT; 11526c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox length = (io.nblocks + 1) << ns->lba_shift; 11536c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 11546c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox switch (io.opcode) { 11556c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_write: 11566c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_read: 11576bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case nvme_cmd_compare: 1158eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_map_user_pages(dev, io.opcode & 1, io.addr, length); 11596413214c5d424fd5aae6567848340f962ad2ce0fMatthew Wilcox break; 11606c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox default: 11616bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EINVAL; 11626c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox } 11636c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 1164eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1165eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1166a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1167a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox memset(&c, 0, sizeof(c)); 1168a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.opcode = io.opcode; 1169a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.flags = io.flags; 11706c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.nsid = cpu_to_le32(ns->ns_id); 1171a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.slba = cpu_to_le64(io.slba); 11726c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.length = cpu_to_le16(io.nblocks); 1173a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.control = cpu_to_le16(io.control); 11741c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); 11751c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.reftag = cpu_to_le32(io.reftag); 11761c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.apptag = cpu_to_le16(io.apptag); 11771c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.appmask = cpu_to_le16(io.appmask); 1178a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox /* XXX: metadata */ 1179eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, GFP_KERNEL); 1180a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1181040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox nvmeq = get_nvmeq(dev); 1182fa92282149842645931580225647238428374758Matthew Wilcox /* 1183fa92282149842645931580225647238428374758Matthew Wilcox * Since nvme_submit_sync_cmd sleeps, we can't keep preemption 1184b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * disabled. We may be preempted at any point, and be rescheduled 1185b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * to a different CPU. That will cause cacheline bouncing, but no 1186b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * additional races since q_lock already protects against other CPUs. 1187b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox */ 1188a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox put_nvmeq(nvmeq); 1189b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (length != (io.nblocks + 1) << ns->lba_shift) 1190b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1191b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 1192ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox status = nvme_submit_sync_cmd(nvmeq, &c, NULL, NVME_IO_TIMEOUT); 1193a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 11941c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, io.opcode & 1, iod); 1195eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 1196a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return status; 1197a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox} 1198a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 119950af8baec46a99a9b81a4600c0374f83a5a590a9Keith Buschstatic int nvme_user_admin_cmd(struct nvme_dev *dev, 12006bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd __user *ucmd) 12016ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox{ 12026bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd cmd; 12036ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox struct nvme_command c; 1204eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int status, length; 1205c7d36ab8fa04c213328119a9c0d66985fe204ee5Keith Busch struct nvme_iod *uninitialized_var(iod); 12066ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 12076bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (!capable(CAP_SYS_ADMIN)) 12086bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EACCES; 12096bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (copy_from_user(&cmd, ucmd, sizeof(cmd))) 12106ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return -EFAULT; 12116ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 12126ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox memset(&c, 0, sizeof(c)); 12136bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.opcode = cmd.opcode; 12146bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.flags = cmd.flags; 12156bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.nsid = cpu_to_le32(cmd.nsid); 12166bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); 12176bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); 12186bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); 12196bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); 12206bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); 12216bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); 12226bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); 12236bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); 12246bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 12256bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox length = cmd.data_len; 12266bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 1227497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox iod = nvme_map_user_pages(dev, cmd.opcode & 1, cmd.addr, 1228497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox length); 1229eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1230eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1231eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, 1232eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_KERNEL); 12336bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 12346bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 12356bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (length != cmd.data_len) 1236b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1237b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 1238f4f117f64baf8840d22266d518227b2a186d294bKeith Busch status = nvme_submit_admin_cmd(dev, &c, &cmd.result); 1239eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 12406bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 12411c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, cmd.opcode & 1, iod); 1242eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 12436bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 1244f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 1245f4f117f64baf8840d22266d518227b2a186d294bKeith Busch if (!status && copy_to_user(&ucmd->result, &cmd.result, 1246f4f117f64baf8840d22266d518227b2a186d294bKeith Busch sizeof(cmd.result))) 1247f4f117f64baf8840d22266d518227b2a186d294bKeith Busch status = -EFAULT; 1248f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 12496ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return status; 12506ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox} 12516ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 1252b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, 1253b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long arg) 1254b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1255b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = bdev->bd_disk->private_data; 1256b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1257b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox switch (cmd) { 12586bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ID: 12596bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return ns->ns_id; 12606bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ADMIN_CMD: 126150af8baec46a99a9b81a4600c0374f83a5a590a9Keith Busch return nvme_user_admin_cmd(ns->dev, (void __user *)arg); 1262a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox case NVME_IOCTL_SUBMIT_IO: 1263a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return nvme_submit_io(ns, (void __user *)arg); 12645d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma case SG_GET_VERSION_NUM: 12655d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma return nvme_sg_get_version_num((void __user *)arg); 12665d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma case SG_IO: 12675d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma return nvme_sg_io(ns, (void __user *)arg); 1268b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox default: 1269b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOTTY; 1270b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1271b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1272b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1273b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic const struct block_device_operations nvme_fops = { 1274b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .owner = THIS_MODULE, 1275b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .ioctl = nvme_ioctl, 12764948168280b269a514045766ddd872cfac5968e1Matthew Wilcox .compat_ioctl = nvme_ioctl, 1277b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1278b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12791fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic void nvme_resubmit_bios(struct nvme_queue *nvmeq) 12801fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 12811fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (bio_list_peek(&nvmeq->sq_cong)) { 12821fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 12831fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_ns *ns = bio->bi_bdev->bd_disk->private_data; 12841fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_submit_bio_queue(nvmeq, ns, bio)) { 12851fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox bio_list_add_head(&nvmeq->sq_cong, bio); 12861fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox break; 12871fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 12883cb967c03926edd2c414082f4cc0feb7b372edaeMatthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 12893cb967c03926edd2c414082f4cc0feb7b372edaeMatthew Wilcox remove_wait_queue(&nvmeq->sq_full, 12903cb967c03926edd2c414082f4cc0feb7b372edaeMatthew Wilcox &nvmeq->sq_cong_wait); 12911fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 12921fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 12931fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 12941fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic int nvme_kthread(void *data) 12951fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 12961fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_dev *dev; 12971fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 12981fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (!kthread_should_stop()) { 1299564a232c059913d91b491e04c2b2d670b8f94615Arjan van de Ven set_current_state(TASK_INTERRUPTIBLE); 13001fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 13011fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_for_each_entry(dev, &dev_list, node) { 13021fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox int i; 13031fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox for (i = 0; i < dev->queue_count; i++) { 13041fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_queue *nvmeq = dev->queues[i]; 1305740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (!nvmeq) 1306740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox continue; 13071fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 13081fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_process_cq(nvmeq)) 13091fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox printk("process_cq did something\n"); 1310a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_cancel_ios(nvmeq, true); 13111fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_resubmit_bios(nvmeq); 13121fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 13131fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 13141fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 13151fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 1316acb7aa0db09b8abd38abeb84334a8a27a52fbb1bArjan van de Ven schedule_timeout(round_jiffies_relative(HZ)); 13171fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 13181fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 13191fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 13201fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 13215aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic DEFINE_IDA(nvme_index_ida); 13225aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 13235aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic int nvme_get_ns_idx(void) 13245aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox{ 13255aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox int index, error; 13265aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 13275aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox do { 13285aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox if (!ida_pre_get(&nvme_index_ida, GFP_KERNEL)) 13295aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox return -1; 13305aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 13315aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_lock(&dev_list_lock); 13325aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox error = ida_get_new(&nvme_index_ida, &index); 13335aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_unlock(&dev_list_lock); 13345aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox } while (error == -EAGAIN); 13355aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 13365aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox if (error) 13375aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox index = -1; 13385aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox return index; 13395aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox} 13405aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 13415aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic void nvme_put_ns_idx(int index) 13425aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox{ 13435aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_lock(&dev_list_lock); 13445aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ida_remove(&nvme_index_ida, index); 13455aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_unlock(&dev_list_lock); 13465aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox} 13475aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 13480e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic void nvme_config_discard(struct nvme_ns *ns) 13490e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 13500e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch u32 logical_block_size = queue_logical_block_size(ns->queue); 13510e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_zeroes_data = 0; 13520e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_alignment = logical_block_size; 13530e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_granularity = logical_block_size; 13540e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.max_discard_sectors = 0xffffffff; 13550e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); 13560e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 13570e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 13585aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, int nsid, 1359b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_id_ns *id, struct nvme_lba_range_type *rt) 1360b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1361b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns; 1362b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct gendisk *disk; 1363b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int lbaf; 1364b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1365b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (rt->attributes & NVME_LBART_ATTRIB_HIDE) 1366b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1367b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1368b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns = kzalloc(sizeof(*ns), GFP_KERNEL); 1369b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns) 1370b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1371b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue = blk_alloc_queue(GFP_KERNEL); 1372b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns->queue) 1373b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_ns; 13744eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox ns->queue->queue_flags = QUEUE_FLAG_DEFAULT; 13754eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue); 13764eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); 1377b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_queue_make_request(ns->queue, nvme_make_request); 1378b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->dev = dev; 1379b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue->queuedata = ns; 1380b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1381b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk = alloc_disk(NVME_MINORS); 1382b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!disk) 1383b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_queue; 13845aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ns->ns_id = nsid; 1385b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->disk = disk; 1386b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox lbaf = id->flbas & 0xf; 1387b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->lba_shift = id->lbaf[lbaf].ds; 1388e9ef46369f5107e634a93b7fc4e62a1f53343197Keith Busch blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); 13898fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch if (dev->max_hw_sectors) 13908fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors); 1391b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1392b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->major = nvme_major; 1393b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->minors = NVME_MINORS; 13945aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox disk->first_minor = NVME_MINORS * nvme_get_ns_idx(); 1395b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->fops = &nvme_fops; 1396b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->private_data = ns; 1397b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->queue = ns->queue; 1398388f037f4e7f0a24bac6b1a24f144f5d939f58cfMatthew Wilcox disk->driverfs_dev = &dev->pci_dev->dev; 13995aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox sprintf(disk->disk_name, "nvme%dn%d", dev->instance, nsid); 1400b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); 1401b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14020e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (dev->oncs & NVME_CTRL_ONCS_DSM) 14030e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvme_config_discard(ns); 14040e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 1405b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return ns; 1406b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1407b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_queue: 1408b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1409b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_ns: 1410b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1411b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1412b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1413b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1414b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_ns_free(struct nvme_ns *ns) 1415b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 14165aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox int index = ns->disk->first_minor / NVME_MINORS; 1417b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox put_disk(ns->disk); 14185aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox nvme_put_ns_idx(index); 1419b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1420b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1421b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1422b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1423b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcoxstatic int set_queue_count(struct nvme_dev *dev, int count) 1424b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1425b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 1426b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 result; 1427b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcox u32 q_count = (count - 1) | ((count - 1) << 16); 1428b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1429df3481399042200792822b6243e36a95a557b57eMatthew Wilcox status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0, 1430bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox &result); 1431b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 1432b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 1433b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return min(result & 0xffff, result >> 16) + 1; 1434b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1435b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14368d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_setup_io_queues(struct nvme_dev *dev) 1437b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1438a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch int result, cpu, i, nr_io_queues, db_bar_size, q_depth; 1439b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1440b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = num_online_cpus(); 1441b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox result = set_queue_count(dev, nr_io_queues); 14421b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox if (result < 0) 14431b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox return result; 1444b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox if (result < nr_io_queues) 1445b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = result; 1446b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14471b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox /* Deregister the admin queue's interrupt */ 14481b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox free_irq(dev->entry[0].vector, dev->queues[0]); 14491b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1450f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox db_bar_size = 4096 + ((nr_io_queues + 1) << (dev->db_stride + 3)); 1451f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox if (db_bar_size > 8192) { 1452f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox iounmap(dev->bar); 1453f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->bar = ioremap(pci_resource_start(dev->pci_dev, 0), 1454f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox db_bar_size); 1455f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 1456f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->queues[0]->q_db = dev->dbs; 1457f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox } 1458f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox 1459b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) 14601b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->entry[i].entry = i; 14611b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox for (;;) { 1462b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox result = pci_enable_msix(dev->pci_dev, dev->entry, 1463b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues); 14641b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox if (result == 0) { 14651b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox break; 14661b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } else if (result > 0) { 1467b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = result; 14681b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox continue; 14691b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } else { 1470b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = 1; 14711b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox break; 14721b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 14731b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 14741b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 14751b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox result = queue_request_irq(dev, dev->queues[0], "nvme admin"); 14761b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox /* XXX: handle failure here */ 14771b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 14781b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_first(cpu_online_mask); 1479b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) { 14801b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox irq_set_affinity_hint(dev->entry[i].vector, get_cpu_mask(cpu)); 14811b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_next(cpu, cpu_online_mask); 14821b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 14831b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1484a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch q_depth = min_t(int, NVME_CAP_MQES(readq(&dev->bar->cap)) + 1, 1485a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch NVME_Q_DEPTH); 1486b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) { 1487a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch dev->queues[i + 1] = nvme_create_queue(dev, i + 1, q_depth, i); 14886f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox if (IS_ERR(dev->queues[i + 1])) 14896f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return PTR_ERR(dev->queues[i + 1]); 14901b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queue_count++; 14911b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 1492b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14939ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox for (; i < num_possible_cpus(); i++) { 14949ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox int target = i % rounddown_pow_of_two(dev->queue_count - 1); 14959ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox dev->queues[i + 1] = dev->queues[target + 1]; 14969ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox } 14979ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox 1498b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1499b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1500b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1501b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_free_queues(struct nvme_dev *dev) 1502b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1503b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int i; 1504b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1505b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (i = dev->queue_count - 1; i >= 0; i--) 1506b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queue(dev, i); 1507b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1508b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1509422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox/* 1510422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * Return: error value if an error occurred setting up the queues or calling 1511422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * Identify Device. 0 if these succeeded, even if adding some of the 1512422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * namespaces failed. At the moment, these failures are silent. TBD which 1513422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * failures should be reported. 1514422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox */ 15158d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_dev_add(struct nvme_dev *dev) 1516b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1517b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int res, nn, i; 1518b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns, *next; 151951814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox struct nvme_id_ctrl *ctrl; 1520bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_id_ns *id_ns; 1521bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox void *mem; 1522b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t dma_addr; 1523b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1524b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = nvme_setup_io_queues(dev); 1525b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1526b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 1527b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1528bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox mem = dma_alloc_coherent(&dev->pci_dev->dev, 8192, &dma_addr, 1529b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 1530b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1531bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, 0, 1, dma_addr); 1532b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) { 1533b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = -EIO; 1534b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free; 1535b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1536b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1537bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ctrl = mem; 153851814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox nn = le32_to_cpup(&ctrl->nn); 15390e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch dev->oncs = le16_to_cpup(&ctrl->oncs); 154051814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn)); 154151814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn)); 154251814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr)); 15438fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch if (ctrl->mdts) { 15448fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12; 15458fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch dev->max_hw_sectors = 1 << (ctrl->mdts + shift - 9); 15468fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch } 1547b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1548bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox id_ns = mem; 15492b2c1896871838cdf549442e8ad0264be5fa74e3Matthew Wilcox for (i = 1; i <= nn; i++) { 1550bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, i, 0, dma_addr); 1551b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1552b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1553b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1554bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox if (id_ns->ncap == 0) 1555b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1556b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1557bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_get_features(dev, NVME_FEAT_LBA_RANGE, i, 155808df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr + 4096, NULL); 1559b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1560122090366d1d5c6ec1bfb6dfdb3a6d121ff074aaKeith Busch memset(mem + 4096, 0, 4096); 1561b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1562bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ns = nvme_alloc_ns(dev, i, mem, mem + 4096); 1563b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (ns) 1564b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_add_tail(&ns->list, &dev->namespaces); 1565b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1566b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry(ns, &dev->namespaces, list) 1567b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox add_disk(ns->disk); 1568422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox res = 0; 1569bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox goto out; 1570b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1571b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free: 1572b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 1573b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_del(&ns->list); 1574b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_ns_free(ns); 1575b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1576b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1577bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox out: 1578684f5c2025b067a23722e620d0b3b858d8dc5d01Matthew Wilcox dma_free_coherent(&dev->pci_dev->dev, 8192, mem, dma_addr); 1579b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 1580b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1581b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1582b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_dev_remove(struct nvme_dev *dev) 1583b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1584b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns, *next; 1585b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 15861fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 15871fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_del(&dev->node); 15881fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 15891fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 1590b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 1591b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_del(&ns->list); 1592b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox del_gendisk(ns->disk); 1593b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_ns_free(ns); 1594b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1595b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1596b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queues(dev); 1597b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1598b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1599b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1600b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1601091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic int nvme_setup_prp_pools(struct nvme_dev *dev) 1602091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 1603091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 1604091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dev->prp_page_pool = dma_pool_create("prp list page", dmadev, 1605091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox PAGE_SIZE, PAGE_SIZE, 0); 1606091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (!dev->prp_page_pool) 1607091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return -ENOMEM; 1608091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 160999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox /* Optimisation for I/Os between 4k and 128k */ 161099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dev->prp_small_pool = dma_pool_create("prp list 256", dmadev, 161199802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 256, 256, 0); 161299802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (!dev->prp_small_pool) { 161399802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 161499802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox return -ENOMEM; 161599802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 1616091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return 0; 1617091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 1618091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1619091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic void nvme_release_prp_pools(struct nvme_dev *dev) 1620091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 1621091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 162299802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_small_pool); 1623091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 1624091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1625cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic DEFINE_IDA(nvme_instance_ida); 1626cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1627cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic int nvme_set_instance(struct nvme_dev *dev) 1628b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1629cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh int instance, error; 1630cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1631cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh do { 1632cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (!ida_pre_get(&nvme_instance_ida, GFP_KERNEL)) 1633cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 1634cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1635cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 1636cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh error = ida_get_new(&nvme_instance_ida, &instance); 1637cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 1638cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh } while (error == -EAGAIN); 1639cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1640cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (error) 1641cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 1642cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1643cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh dev->instance = instance; 1644cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return 0; 1645b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1646b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1647b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_release_instance(struct nvme_dev *dev) 1648b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1649cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 1650cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh ida_remove(&nvme_instance_ida, dev->instance); 1651cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 1652b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1653b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 16545e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic void nvme_free_dev(struct kref *kref) 16555e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 16565e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = container_of(kref, struct nvme_dev, kref); 16575e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_dev_remove(dev); 16585e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch pci_disable_msix(dev->pci_dev); 16595e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch iounmap(dev->bar); 16605e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_release_instance(dev); 16615e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_release_prp_pools(dev); 16625e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch pci_disable_device(dev->pci_dev); 16635e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch pci_release_regions(dev->pci_dev); 16645e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev->queues); 16655e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev->entry); 16665e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev); 16675e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 16685e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 16695e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic int nvme_dev_open(struct inode *inode, struct file *f) 16705e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 16715e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = container_of(f->private_data, struct nvme_dev, 16725e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch miscdev); 16735e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_get(&dev->kref); 16745e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch f->private_data = dev; 16755e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return 0; 16765e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 16775e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 16785e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic int nvme_dev_release(struct inode *inode, struct file *f) 16795e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 16805e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = f->private_data; 16815e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_put(&dev->kref, nvme_free_dev); 16825e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return 0; 16835e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 16845e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 16855e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic long nvme_dev_ioctl(struct file *f, unsigned int cmd, unsigned long arg) 16865e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 16875e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = f->private_data; 16885e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch switch (cmd) { 16895e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch case NVME_IOCTL_ADMIN_CMD: 16905e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return nvme_user_admin_cmd(dev, (void __user *)arg); 16915e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch default: 16925e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return -ENOTTY; 16935e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch } 16945e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 16955e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 16965e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic const struct file_operations nvme_dev_fops = { 16975e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .owner = THIS_MODULE, 16985e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .open = nvme_dev_open, 16995e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .release = nvme_dev_release, 17005e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .unlocked_ioctl = nvme_dev_ioctl, 17015e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .compat_ioctl = nvme_dev_ioctl, 17025e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch}; 17035e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 17048d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) 1705b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1706574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox int bars, result = -ENOMEM; 1707b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev; 1708b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1709b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev = kzalloc(sizeof(*dev), GFP_KERNEL); 1710b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev) 1711b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOMEM; 1712b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->entry = kcalloc(num_possible_cpus(), sizeof(*dev->entry), 1713b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 1714b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->entry) 1715b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 17161b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queues = kcalloc(num_possible_cpus() + 1, sizeof(void *), 17171b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox GFP_KERNEL); 1718b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->queues) 1719b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 1720b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 17210ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews if (pci_enable_device_mem(pdev)) 17220ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews goto free; 1723f64d3365a3e5cb46e69db7e2c82a7cb9a5bed1b8Matthew Wilcox pci_set_master(pdev); 1724574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox bars = pci_select_bars(pdev, IORESOURCE_MEM); 1725574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox if (pci_request_selected_regions(pdev, bars, "nvme")) 1726574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox goto disable; 17270ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews 1728b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox INIT_LIST_HEAD(&dev->namespaces); 1729b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->pci_dev = pdev; 1730b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_set_drvdata(pdev, dev); 17312930353f9f2b9e4629e935acd970cb73c1171229Matthew Wilcox dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); 17322930353f9f2b9e4629e935acd970cb73c1171229Matthew Wilcox dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); 1733cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh result = nvme_set_instance(dev); 1734cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (result) 1735cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh goto disable; 1736cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 173753c9577e9ca68a633c6e9df2b54eaecacfa77f62Matthew Wilcox dev->entry[0].vector = pdev->irq; 1738b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1739091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox result = nvme_setup_prp_pools(dev); 1740091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (result) 1741091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox goto disable_msix; 1742091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1743b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); 1744b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->bar) { 1745b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = -ENOMEM; 1746574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox goto disable_msix; 1747b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1748b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1749b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = nvme_configure_admin_queue(dev); 1750b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 1751b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto unmap; 1752b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->queue_count++; 1753b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 17541fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 17551fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_add(&dev->node, &dev_list); 17561fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 17571fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 1758740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox result = nvme_dev_add(dev); 1759740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (result) 1760740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox goto delete; 1761740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 17625e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch scnprintf(dev->name, sizeof(dev->name), "nvme%d", dev->instance); 17635e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.minor = MISC_DYNAMIC_MINOR; 17645e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.parent = &pdev->dev; 17655e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.name = dev->name; 17665e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.fops = &nvme_dev_fops; 17675e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch result = misc_register(&dev->miscdev); 17685e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch if (result) 17695e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch goto remove; 17705e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 17715e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_init(&dev->kref); 1772b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1773b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 17745e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch remove: 17755e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_dev_remove(dev); 1776b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox delete: 1777740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox spin_lock(&dev_list_lock); 1778740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox list_del(&dev->node); 1779740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox spin_unlock(&dev_list_lock); 1780740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 1781b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queues(dev); 1782b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unmap: 1783b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox iounmap(dev->bar); 1784574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox disable_msix: 1785b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_disable_msix(pdev); 1786b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_release_instance(dev); 1787091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvme_release_prp_pools(dev); 1788574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox disable: 17890ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews pci_disable_device(pdev); 1790574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox pci_release_regions(pdev); 1791b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free: 1792b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->queues); 1793b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->entry); 1794b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev); 1795b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1796b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1797b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 17988d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic void nvme_remove(struct pci_dev *pdev) 1799b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1800b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev = pci_get_drvdata(pdev); 18015e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch misc_deregister(&dev->miscdev); 18025e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_put(&dev->kref, nvme_free_dev); 1803b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1804b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1805b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* These functions are yet to be implemented */ 1806b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_detected NULL 1807b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_dump_registers NULL 1808b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_link_reset NULL 1809b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_slot_reset NULL 1810b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_resume NULL 1811b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_suspend NULL 1812b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_resume NULL 1813b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 18141d3520357df99baf4ad89f86268ac96cd38092d9Stephen Hemmingerstatic const struct pci_error_handlers nvme_err_handler = { 1815b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .error_detected = nvme_error_detected, 1816b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .mmio_enabled = nvme_dump_registers, 1817b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .link_reset = nvme_link_reset, 1818b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .slot_reset = nvme_slot_reset, 1819b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_error_resume, 1820b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1821b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1822b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* Move to pci_ids.h later */ 1823b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define PCI_CLASS_STORAGE_EXPRESS 0x010802 1824b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1825b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic DEFINE_PCI_DEVICE_TABLE(nvme_id_table) = { 1826b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, 1827b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { 0, } 1828b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1829b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_DEVICE_TABLE(pci, nvme_id_table); 1830b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1831b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct pci_driver nvme_driver = { 1832b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .name = "nvme", 1833b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .id_table = nvme_id_table, 1834b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .probe = nvme_probe, 18358d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartman .remove = nvme_remove, 1836b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .suspend = nvme_suspend, 1837b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_resume, 1838b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .err_handler = &nvme_err_handler, 1839b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1840b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1841b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __init nvme_init(void) 1842b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 18430ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox int result; 18441fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 18451fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); 18461fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (IS_ERR(nvme_thread)) 18471fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return PTR_ERR(nvme_thread); 1848b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 18495c42ea1643a630060f9e71e06d3933d244970967Keith Busch result = register_blkdev(nvme_major, "nvme"); 18505c42ea1643a630060f9e71e06d3933d244970967Keith Busch if (result < 0) 18511fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto kill_kthread; 18525c42ea1643a630060f9e71e06d3933d244970967Keith Busch else if (result > 0) 18530ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox nvme_major = result; 1854b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1855b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = pci_register_driver(&nvme_driver); 18561fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (result) 18571fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto unregister_blkdev; 18581fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 1859b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 18601fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox unregister_blkdev: 1861b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 18621fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kill_kthread: 18631fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 1864b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1865b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1866b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1867b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void __exit nvme_exit(void) 1868b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1869b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_unregister_driver(&nvme_driver); 1870b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 18711fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 1872b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1873b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1874b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); 1875b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_LICENSE("GPL"); 1876366e8217e5ec6ce9f73aec19c46d983110fb4a98Matthew WilcoxMODULE_VERSION("0.8"); 1877b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_init(nvme_init); 1878b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_exit(nvme_exit); 1879