nvme-core.c revision 063a8096f3dbca7521d5918b3aea7ab46c5d2fe9
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 bio_completion(struct nvme_dev *dev, void *ctx, 312b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion *cqe) 313b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 314eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = ctx; 315eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct bio *bio = iod->private; 316b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 status = le16_to_cpup(&cqe->status) >> 1; 317b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3182b1960341576bf51c01b12fefeb1cc53820923e7Keith Busch if (iod->nents) 3192b1960341576bf51c01b12fefeb1cc53820923e7Keith Busch dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 320b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_data_dir(bio) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 321eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 322427e97080196548557b288517537ab7eb48c309fKeith Busch if (status) 3231ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, -EIO); 324427e97080196548557b288517537ab7eb48c309fKeith Busch else 3251ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, 0); 326b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 327b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 328184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* length is in bytes. gfp flags indicates whether we may sleep. */ 3295d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_setup_prps(struct nvme_dev *dev, struct nvme_common_command *cmd, 3305d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma struct nvme_iod *iod, int total_len, gfp_t gfp) 331ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox{ 33299802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox struct dma_pool *pool; 333eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int length = total_len; 334eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct scatterlist *sg = iod->sg; 335ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int dma_len = sg_dma_len(sg); 336ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox u64 dma_addr = sg_dma_address(sg); 337ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int offset = offset_in_page(dma_addr); 338e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *prp_list; 339eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 340e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr_t prp_dma; 341eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int nprps, i; 342ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 343ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmd->prp1 = cpu_to_le64(dma_addr); 344ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox length -= (PAGE_SIZE - offset); 345ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= 0) 346eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 347ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 348ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len -= (PAGE_SIZE - offset); 349ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (dma_len) { 350ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr += (PAGE_SIZE - offset); 351ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } else { 352ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox sg = sg_next(sg); 353ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr = sg_dma_address(sg); 354ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len = sg_dma_len(sg); 355ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 356ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 357ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= PAGE_SIZE) { 358ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmd->prp2 = cpu_to_le64(dma_addr); 359eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 360e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 361e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 362e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews nprps = DIV_ROUND_UP(length, PAGE_SIZE); 36399802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (nprps <= (256 / 8)) { 36499802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_small_pool; 365eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 0; 36699802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } else { 36799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_page_pool; 368eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 1; 36999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 37099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 371b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 372b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (!prp_list) { 373b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox cmd->prp2 = cpu_to_le64(dma_addr); 374eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 375eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return (total_len - length) + PAGE_SIZE; 376b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox } 377eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[0] = prp_list; 378eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->first_dma = prp_dma; 379e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews cmd->prp2 = cpu_to_le64(prp_dma); 380e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews i = 0; 381e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews for (;;) { 3827523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox if (i == PAGE_SIZE / 8) { 383e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *old_prp_list = prp_list; 384b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 385eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!prp_list) 386eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len - length; 387eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[iod->npages++] = prp_list; 3887523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox prp_list[0] = old_prp_list[i - 1]; 3897523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox old_prp_list[i - 1] = cpu_to_le64(prp_dma); 3907523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox i = 1; 391e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 392e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews prp_list[i++] = cpu_to_le64(dma_addr); 393e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len -= PAGE_SIZE; 394e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr += PAGE_SIZE; 395e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews length -= PAGE_SIZE; 396e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (length <= 0) 397e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews break; 398e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (dma_len > 0) 399e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews continue; 400e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews BUG_ON(dma_len < 0); 401e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews sg = sg_next(sg); 402e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr = sg_dma_address(sg); 403e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len = sg_dma_len(sg); 404ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 405ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 406eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 407ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox} 408ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 409427e97080196548557b288517537ab7eb48c309fKeith Buschstruct nvme_bio_pair { 410427e97080196548557b288517537ab7eb48c309fKeith Busch struct bio b1, b2, *parent; 411427e97080196548557b288517537ab7eb48c309fKeith Busch struct bio_vec *bv1, *bv2; 412427e97080196548557b288517537ab7eb48c309fKeith Busch int err; 413427e97080196548557b288517537ab7eb48c309fKeith Busch atomic_t cnt; 414427e97080196548557b288517537ab7eb48c309fKeith Busch}; 415427e97080196548557b288517537ab7eb48c309fKeith Busch 416427e97080196548557b288517537ab7eb48c309fKeith Buschstatic void nvme_bio_pair_endio(struct bio *bio, int err) 417427e97080196548557b288517537ab7eb48c309fKeith Busch{ 418427e97080196548557b288517537ab7eb48c309fKeith Busch struct nvme_bio_pair *bp = bio->bi_private; 419427e97080196548557b288517537ab7eb48c309fKeith Busch 420427e97080196548557b288517537ab7eb48c309fKeith Busch if (err) 421427e97080196548557b288517537ab7eb48c309fKeith Busch bp->err = err; 422427e97080196548557b288517537ab7eb48c309fKeith Busch 423427e97080196548557b288517537ab7eb48c309fKeith Busch if (atomic_dec_and_test(&bp->cnt)) { 424427e97080196548557b288517537ab7eb48c309fKeith Busch bio_endio(bp->parent, bp->err); 425427e97080196548557b288517537ab7eb48c309fKeith Busch if (bp->bv1) 426427e97080196548557b288517537ab7eb48c309fKeith Busch kfree(bp->bv1); 427427e97080196548557b288517537ab7eb48c309fKeith Busch if (bp->bv2) 428427e97080196548557b288517537ab7eb48c309fKeith Busch kfree(bp->bv2); 429427e97080196548557b288517537ab7eb48c309fKeith Busch kfree(bp); 430427e97080196548557b288517537ab7eb48c309fKeith Busch } 431427e97080196548557b288517537ab7eb48c309fKeith Busch} 432427e97080196548557b288517537ab7eb48c309fKeith Busch 433427e97080196548557b288517537ab7eb48c309fKeith Buschstatic struct nvme_bio_pair *nvme_bio_split(struct bio *bio, int idx, 434427e97080196548557b288517537ab7eb48c309fKeith Busch int len, int offset) 435427e97080196548557b288517537ab7eb48c309fKeith Busch{ 436427e97080196548557b288517537ab7eb48c309fKeith Busch struct nvme_bio_pair *bp; 437427e97080196548557b288517537ab7eb48c309fKeith Busch 438427e97080196548557b288517537ab7eb48c309fKeith Busch BUG_ON(len > bio->bi_size); 439427e97080196548557b288517537ab7eb48c309fKeith Busch BUG_ON(idx > bio->bi_vcnt); 440427e97080196548557b288517537ab7eb48c309fKeith Busch 441427e97080196548557b288517537ab7eb48c309fKeith Busch bp = kmalloc(sizeof(*bp), GFP_ATOMIC); 442427e97080196548557b288517537ab7eb48c309fKeith Busch if (!bp) 443427e97080196548557b288517537ab7eb48c309fKeith Busch return NULL; 444427e97080196548557b288517537ab7eb48c309fKeith Busch bp->err = 0; 445427e97080196548557b288517537ab7eb48c309fKeith Busch 446427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1 = *bio; 447427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2 = *bio; 448427e97080196548557b288517537ab7eb48c309fKeith Busch 449427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_size = len; 450427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_size -= len; 451427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_vcnt = idx; 452427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_idx = idx; 453427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_sector += len >> 9; 454427e97080196548557b288517537ab7eb48c309fKeith Busch 455427e97080196548557b288517537ab7eb48c309fKeith Busch if (offset) { 456427e97080196548557b288517537ab7eb48c309fKeith Busch bp->bv1 = kmalloc(bio->bi_max_vecs * sizeof(struct bio_vec), 457427e97080196548557b288517537ab7eb48c309fKeith Busch GFP_ATOMIC); 458427e97080196548557b288517537ab7eb48c309fKeith Busch if (!bp->bv1) 459427e97080196548557b288517537ab7eb48c309fKeith Busch goto split_fail_1; 460427e97080196548557b288517537ab7eb48c309fKeith Busch 461427e97080196548557b288517537ab7eb48c309fKeith Busch bp->bv2 = kmalloc(bio->bi_max_vecs * sizeof(struct bio_vec), 462427e97080196548557b288517537ab7eb48c309fKeith Busch GFP_ATOMIC); 463427e97080196548557b288517537ab7eb48c309fKeith Busch if (!bp->bv2) 464427e97080196548557b288517537ab7eb48c309fKeith Busch goto split_fail_2; 465427e97080196548557b288517537ab7eb48c309fKeith Busch 466427e97080196548557b288517537ab7eb48c309fKeith Busch memcpy(bp->bv1, bio->bi_io_vec, 467427e97080196548557b288517537ab7eb48c309fKeith Busch bio->bi_max_vecs * sizeof(struct bio_vec)); 468427e97080196548557b288517537ab7eb48c309fKeith Busch memcpy(bp->bv2, bio->bi_io_vec, 469427e97080196548557b288517537ab7eb48c309fKeith Busch bio->bi_max_vecs * sizeof(struct bio_vec)); 470427e97080196548557b288517537ab7eb48c309fKeith Busch 471427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_io_vec = bp->bv1; 472427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_io_vec = bp->bv2; 473427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_io_vec[idx].bv_offset += offset; 474427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_io_vec[idx].bv_len -= offset; 475427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_io_vec[idx].bv_len = offset; 476427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_vcnt++; 477427e97080196548557b288517537ab7eb48c309fKeith Busch } else 478427e97080196548557b288517537ab7eb48c309fKeith Busch bp->bv1 = bp->bv2 = NULL; 479427e97080196548557b288517537ab7eb48c309fKeith Busch 480427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_private = bp; 481427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_private = bp; 482427e97080196548557b288517537ab7eb48c309fKeith Busch 483427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_end_io = nvme_bio_pair_endio; 484427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_end_io = nvme_bio_pair_endio; 485427e97080196548557b288517537ab7eb48c309fKeith Busch 486427e97080196548557b288517537ab7eb48c309fKeith Busch bp->parent = bio; 487427e97080196548557b288517537ab7eb48c309fKeith Busch atomic_set(&bp->cnt, 2); 488427e97080196548557b288517537ab7eb48c309fKeith Busch 489427e97080196548557b288517537ab7eb48c309fKeith Busch return bp; 490427e97080196548557b288517537ab7eb48c309fKeith Busch 491427e97080196548557b288517537ab7eb48c309fKeith Busch split_fail_2: 492427e97080196548557b288517537ab7eb48c309fKeith Busch kfree(bp->bv1); 493427e97080196548557b288517537ab7eb48c309fKeith Busch split_fail_1: 494427e97080196548557b288517537ab7eb48c309fKeith Busch kfree(bp); 495427e97080196548557b288517537ab7eb48c309fKeith Busch return NULL; 496427e97080196548557b288517537ab7eb48c309fKeith Busch} 497427e97080196548557b288517537ab7eb48c309fKeith Busch 498427e97080196548557b288517537ab7eb48c309fKeith Buschstatic int nvme_split_and_submit(struct bio *bio, struct nvme_queue *nvmeq, 499427e97080196548557b288517537ab7eb48c309fKeith Busch int idx, int len, int offset) 500427e97080196548557b288517537ab7eb48c309fKeith Busch{ 501427e97080196548557b288517537ab7eb48c309fKeith Busch struct nvme_bio_pair *bp = nvme_bio_split(bio, idx, len, offset); 502427e97080196548557b288517537ab7eb48c309fKeith Busch if (!bp) 503427e97080196548557b288517537ab7eb48c309fKeith Busch return -ENOMEM; 504427e97080196548557b288517537ab7eb48c309fKeith Busch 505427e97080196548557b288517537ab7eb48c309fKeith Busch if (bio_list_empty(&nvmeq->sq_cong)) 506427e97080196548557b288517537ab7eb48c309fKeith Busch add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 507427e97080196548557b288517537ab7eb48c309fKeith Busch bio_list_add(&nvmeq->sq_cong, &bp->b1); 508427e97080196548557b288517537ab7eb48c309fKeith Busch bio_list_add(&nvmeq->sq_cong, &bp->b2); 509427e97080196548557b288517537ab7eb48c309fKeith Busch 510427e97080196548557b288517537ab7eb48c309fKeith Busch return 0; 511427e97080196548557b288517537ab7eb48c309fKeith Busch} 512427e97080196548557b288517537ab7eb48c309fKeith Busch 5131ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox/* NVMe scatterlists require no holes in the virtual address */ 5141ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox#define BIOVEC_NOT_VIRT_MERGEABLE(vec1, vec2) ((vec2)->bv_offset || \ 5151ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox (((vec1)->bv_offset + (vec1)->bv_len) % PAGE_SIZE)) 5161ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox 517427e97080196548557b288517537ab7eb48c309fKeith Buschstatic int nvme_map_bio(struct nvme_queue *nvmeq, struct nvme_iod *iod, 518b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio, enum dma_data_direction dma_dir, int psegs) 519b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 520768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox struct bio_vec *bvec, *bvprv = NULL; 521768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox struct scatterlist *sg = NULL; 522159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch int i, length = 0, nsegs = 0, split_len = bio->bi_size; 523159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch 524159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if (nvmeq->dev->stripe_size) 525159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch split_len = nvmeq->dev->stripe_size - 526159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch ((bio->bi_sector << 9) & (nvmeq->dev->stripe_size - 1)); 527b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 528eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg_init_table(iod->sg, psegs); 529b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_for_each_segment(bvec, bio, i) { 530768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox if (bvprv && BIOVEC_PHYS_MERGEABLE(bvprv, bvec)) { 531768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg->length += bvec->bv_len; 532768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } else { 5331ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox if (bvprv && BIOVEC_NOT_VIRT_MERGEABLE(bvprv, bvec)) 534427e97080196548557b288517537ab7eb48c309fKeith Busch return nvme_split_and_submit(bio, nvmeq, i, 535427e97080196548557b288517537ab7eb48c309fKeith Busch length, 0); 536427e97080196548557b288517537ab7eb48c309fKeith Busch 537eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = sg ? sg + 1 : iod->sg; 538768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_set_page(sg, bvec->bv_page, bvec->bv_len, 539768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvec->bv_offset); 540768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox nsegs++; 541768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } 542159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch 543159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if (split_len - length < bvec->bv_len) 544159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch return nvme_split_and_submit(bio, nvmeq, i, split_len, 545159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch split_len - length); 5461ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox length += bvec->bv_len; 547768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvprv = bvec; 548b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 549eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->nents = nsegs; 550768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_mark_end(sg); 551427e97080196548557b288517537ab7eb48c309fKeith Busch if (dma_map_sg(nvmeq->q_dmadev, iod->sg, iod->nents, dma_dir) == 0) 5521ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return -ENOMEM; 553427e97080196548557b288517537ab7eb48c309fKeith Busch 554159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch BUG_ON(length != bio->bi_size); 5551ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return length; 556b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 557b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 5580e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch/* 5590e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * We reuse the small pool to allocate the 16-byte range here as it is not 5600e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * worth having a special pool for these or additional cases to handle freeing 5610e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * the iod. 5620e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch */ 5630e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic int nvme_submit_discard(struct nvme_queue *nvmeq, struct nvme_ns *ns, 5640e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct bio *bio, struct nvme_iod *iod, int cmdid) 5650e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 5660e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct nvme_dsm_range *range; 5670e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 5680e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5690e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range = dma_pool_alloc(nvmeq->dev->prp_small_pool, GFP_ATOMIC, 5700e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch &iod->first_dma); 5710e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (!range) 5720e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return -ENOMEM; 5730e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5740e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch iod_list(iod)[0] = (__le64 *)range; 5750e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch iod->npages = 0; 5760e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5770e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range->cattr = cpu_to_le32(0); 5780e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range->nlb = cpu_to_le32(bio->bi_size >> ns->lba_shift); 579063cc6d5591ea9c0631b81ac5c7b829d99738b2fMatthew Wilcox range->slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_sector)); 5800e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5810e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch memset(cmnd, 0, sizeof(*cmnd)); 5820e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.opcode = nvme_cmd_dsm; 5830e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.command_id = cmdid; 5840e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nsid = cpu_to_le32(ns->ns_id); 5850e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.prp1 = cpu_to_le64(iod->first_dma); 5860e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nr = 0; 5870e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); 5880e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5890e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (++nvmeq->sq_tail == nvmeq->q_depth) 5900e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvmeq->sq_tail = 0; 5910e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch writel(nvmeq->sq_tail, nvmeq->q_db); 5920e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5930e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return 0; 5940e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 5950e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 59600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcoxstatic int nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns, 59700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid) 59800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 59900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 60000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 60100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 60200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.opcode = nvme_cmd_flush; 60300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.command_id = cmdid; 60400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.nsid = cpu_to_le32(ns->ns_id); 60500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 60600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 60700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox nvmeq->sq_tail = 0; 60800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 60900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 61000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return 0; 61100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 61200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 6135d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns) 61400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 61500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid = alloc_cmdid(nvmeq, (void *)CMD_CTX_FLUSH, 616ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox special_completion, NVME_IO_TIMEOUT); 61700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (unlikely(cmdid < 0)) 61800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return cmdid; 61900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 62000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 62100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 62200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 623184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 624184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 625184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 626b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns, 627b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio) 628b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 629ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox struct nvme_command *cmnd; 630eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 631b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox enum dma_data_direction dma_dir; 6321287dabd345f447bbe0f7a99fc95ab89bcfc0f5dWei Yongjun int cmdid, length, result; 633b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 control; 634b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 dsmgmt; 635b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int psegs = bio_phys_segments(ns->queue, bio); 636b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 63700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && psegs) { 63800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox result = nvme_submit_flush_data(nvmeq, ns); 63900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (result) 64000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return result; 64100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox } 64200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 6431287dabd345f447bbe0f7a99fc95ab89bcfc0f5dWei Yongjun result = -ENOMEM; 644eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(psegs, bio->bi_size, GFP_ATOMIC); 645eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!iod) 646eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox goto nomem; 647eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->private = bio; 648b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 649eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox result = -EBUSY; 650ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox cmdid = alloc_cmdid(nvmeq, iod, bio_completion, NVME_IO_TIMEOUT); 651b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (unlikely(cmdid < 0)) 652eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 653b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 6540e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (bio->bi_rw & REQ_DISCARD) { 6550e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch result = nvme_submit_discard(nvmeq, ns, bio, iod, cmdid); 6560e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (result) 6570e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch goto free_cmdid; 6580e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return result; 6590e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch } 66000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && !psegs) 66100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 66200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 663b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control = 0; 664b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_FUA) 665b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_FUA; 666b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & (REQ_FAILFAST_DEV | REQ_RAHEAD)) 667b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_LR; 668b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 669b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt = 0; 670b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_RAHEAD) 671b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; 672b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 673ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 674b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 675b8deb62cf271fa9381edc8cf52bcae2f0225c55aMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 676b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio_data_dir(bio)) { 677ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_write; 678b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_TO_DEVICE; 679b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } else { 680ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_read; 681b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_FROM_DEVICE; 682b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 683b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 684427e97080196548557b288517537ab7eb48c309fKeith Busch result = nvme_map_bio(nvmeq, iod, bio, dma_dir, psegs); 685427e97080196548557b288517537ab7eb48c309fKeith Busch if (result <= 0) 686859361a228258edf4821d9f5635825033eca78e8Keith Busch goto free_cmdid; 6871ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox length = result; 688b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 689ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.command_id = cmdid; 690ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.nsid = cpu_to_le32(ns->ns_id); 691eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(nvmeq->dev, &cmnd->common, iod, length, 692eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_ATOMIC); 693063cc6d5591ea9c0631b81ac5c7b829d99738b2fMatthew Wilcox cmnd->rw.slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_sector)); 6941ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox cmnd->rw.length = cpu_to_le16((length >> ns->lba_shift) - 1); 695ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.control = cpu_to_le16(control); 696ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); 697b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 698b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 699b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = 0; 7007547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 701b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7021974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox return 0; 7031974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox 704859361a228258edf4821d9f5635825033eca78e8Keith Busch free_cmdid: 705859361a228258edf4821d9f5635825033eca78e8Keith Busch free_cmdid(nvmeq, cmdid, NULL); 706eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 707eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(nvmeq->dev, iod); 708eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox nomem: 709eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox return result; 710b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 711b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 71293c3d65b28bab6da520c2add9cb387a0303f8b2dLinus Torvaldsstatic void nvme_make_request(struct request_queue *q, struct bio *bio) 713b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 714b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = q->queuedata; 715040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox struct nvme_queue *nvmeq = get_nvmeq(ns->dev); 716eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox int result = -EBUSY; 717eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox 718eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 719eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 720eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox result = nvme_submit_bio_queue(nvmeq, ns, bio); 721eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (unlikely(result)) { 722eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 723eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 724b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_add(&nvmeq->sq_cong, bio); 725b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 726eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox 727eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 728b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox put_nvmeq(nvmeq); 729b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 730b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 731b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_process_cq(struct nvme_queue *nvmeq) 732b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 733821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox u16 head, phase; 734b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 735b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = nvmeq->cq_head; 736821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = nvmeq->cq_phase; 737b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 738b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (;;) { 739c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 740c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 741b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion cqe = nvmeq->cqes[head]; 742821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != phase) 743b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox break; 744b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_head = le16_to_cpu(cqe.sq_head); 745b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++head == nvmeq->q_depth) { 746b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = 0; 747821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = !phase; 748b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 749b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 750c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = free_cmdid(nvmeq, cqe.command_id, &fn); 7515c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox fn(nvmeq->dev, ctx, &cqe); 752b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 753b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 754b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* If the controller ignores the cq head doorbell and continuously 755b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * writes to the queue, it is theoretically possible to wrap around 756b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the queue twice and mistakenly return IRQ_NONE. Linux only 757b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * requires that 0.1% of your interrupts are handled, so this isn't 758b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * a big problem. 759b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 760821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) 761b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return IRQ_NONE; 762b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 763f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox writel(head, nvmeq->q_db + (1 << nvmeq->dev->db_stride)); 764b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = head; 765821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = phase; 766b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 767b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return IRQ_HANDLED; 768b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 769b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 770b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_irq(int irq, void *data) 771b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 77258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox irqreturn_t result; 77358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 77458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_lock(&nvmeq->q_lock); 77558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox result = nvme_process_cq(nvmeq); 77658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_unlock(&nvmeq->q_lock); 77758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return result; 77858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 77958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 78058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic irqreturn_t nvme_irq_check(int irq, void *data) 78158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox{ 78258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 78358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; 78458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) 78558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_NONE; 78658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_WAKE_THREAD; 78758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 78858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 7893c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcoxstatic void nvme_abort_command(struct nvme_queue *nvmeq, int cmdid) 7903c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 7913c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 792c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cancel_cmdid(nvmeq, cmdid, NULL); 7933c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 7943c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 7953c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 796c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstruct sync_cmd_info { 797c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct task_struct *task; 798c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox u32 result; 799c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox int status; 800c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox}; 801c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 8025c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void sync_completion(struct nvme_dev *dev, void *ctx, 803c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 804c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 805c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct sync_cmd_info *cmdinfo = ctx; 806c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->result = le32_to_cpup(&cqe->result); 807c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; 808c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox wake_up_process(cmdinfo->task); 809c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 810c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 811b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 812b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Returns 0 on success. If the result is negative, it's a Linux error code; 813b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * if the result is positive, it's an NVM Express status code 814b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 8155d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_sync_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd, 8165d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma u32 *result, unsigned timeout) 817b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 818b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 819b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct sync_cmd_info cmdinfo; 820b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 821b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.task = current; 822b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.status = -EINTR; 823b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 824c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdid = alloc_cmdid_killable(nvmeq, &cmdinfo, sync_completion, 825e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox timeout); 826b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid < 0) 827b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 828b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmd->common.command_id = cmdid; 829b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8303c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox set_current_state(TASK_KILLABLE); 8313c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_submit_cmd(nvmeq, cmd); 83278f8d2577bd79ce9d62f4d9e6d3b895bd1dd1d1dKeith Busch schedule_timeout(timeout); 833b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8343c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox if (cmdinfo.status == -EINTR) { 8353c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_abort_command(nvmeq, cmdid); 8363c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox return -EINTR; 8373c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox } 8383c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 839b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 840b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox *result = cmdinfo.result; 841b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 842b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdinfo.status; 843b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 844b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8455d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd, 846b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 *result) 847b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 848e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return nvme_submit_sync_cmd(dev->queues[0], cmd, result, ADMIN_TIMEOUT); 849b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 850b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 851b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) 852b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 853b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 854b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 855b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 856b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 857b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.opcode = opcode; 858b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.qid = cpu_to_le16(id); 859b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 860b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 861b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 862b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 863b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 864b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 865b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 866b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, 867b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 868b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 869b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 870b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 871b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; 872b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 873b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 874b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.opcode = nvme_admin_create_cq; 875b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); 876b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cqid = cpu_to_le16(qid); 877b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 878b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cq_flags = cpu_to_le16(flags); 879b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); 880b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 881b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 882b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 883b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 884b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 885b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 886b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 887b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, 888b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 889b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 890b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 891b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 892b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; 893b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 894b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 895b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.opcode = nvme_admin_create_sq; 896b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); 897b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sqid = cpu_to_le16(qid); 898b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 899b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sq_flags = cpu_to_le16(flags); 900b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.cqid = cpu_to_le16(qid); 901b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 902b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 903b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 904b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 905b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 906b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 907b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 908b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) 909b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 910b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); 911b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 912b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 913b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) 914b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 915b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); 916b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 917b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9185d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns, 919bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox dma_addr_t dma_addr) 920bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 921bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 922bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 923bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 924bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.opcode = nvme_admin_identify; 925bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.nsid = cpu_to_le32(nsid); 926bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.prp1 = cpu_to_le64(dma_addr); 927bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.cns = cpu_to_le32(cns); 928bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 929bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, NULL); 930bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 931bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 9325d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid, 93308df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr_t dma_addr, u32 *result) 934bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 935bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 936bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 937bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 938bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.opcode = nvme_admin_get_features; 939a42ceccef0c43b46ff6bc1b12a7c1076ef243df1Keith Busch c.features.nsid = cpu_to_le32(nsid); 940bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 941bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.fid = cpu_to_le32(fid); 942bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 94308df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch return nvme_submit_admin_cmd(dev, &c, result); 944df3481399042200792822b6243e36a95a557b57eMatthew Wilcox} 945df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 9465d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11, 9475d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma dma_addr_t dma_addr, u32 *result) 948df3481399042200792822b6243e36a95a557b57eMatthew Wilcox{ 949df3481399042200792822b6243e36a95a557b57eMatthew Wilcox struct nvme_command c; 950df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 951df3481399042200792822b6243e36a95a557b57eMatthew Wilcox memset(&c, 0, sizeof(c)); 952df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.opcode = nvme_admin_set_features; 953df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 954df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.fid = cpu_to_le32(fid); 955df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.dword11 = cpu_to_le32(dword11); 956df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 957bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, result); 958bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 959bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 960a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox/** 961a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * nvme_cancel_ios - Cancel outstanding I/Os 962a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @queue: The queue to cancel I/Os on 963a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @timeout: True to only cancel I/Os which have timed out 964a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox */ 965a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcoxstatic void nvme_cancel_ios(struct nvme_queue *nvmeq, bool timeout) 966a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox{ 967a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int depth = nvmeq->q_depth - 1; 968a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 969a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox unsigned long now = jiffies; 970a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int cmdid; 971a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 972a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox for_each_set_bit(cmdid, nvmeq->cmdid_data, depth) { 973a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox void *ctx; 974a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_completion_fn fn; 975a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox static struct nvme_completion cqe = { 976af2d9ca744af5e03390eeb3864d08ce75c860899Matthew Wilcox .status = cpu_to_le16(NVME_SC_ABORT_REQ << 1), 977a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox }; 978a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 979a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox if (timeout && !time_after(now, info[cmdid].timeout)) 980a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox continue; 981053ab702cc2702f25a97ead087ed344b864785b7Keith Busch if (info[cmdid].ctx == CMD_CTX_CANCELLED) 982053ab702cc2702f25a97ead087ed344b864785b7Keith Busch continue; 983a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox dev_warn(nvmeq->q_dmadev, "Cancelling I/O %d\n", cmdid); 984a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox ctx = cancel_cmdid(nvmeq, cmdid, &fn); 985a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox fn(nvmeq->dev, ctx, &cqe); 986a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox } 987a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox} 988a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 9899e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcoxstatic void nvme_free_queue_mem(struct nvme_queue *nvmeq) 9909e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox{ 9919e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 9929e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 9939e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 9949e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 9959e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox kfree(nvmeq); 9969e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox} 9979e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 998b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_free_queue(struct nvme_dev *dev, int qid) 999b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1000b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = dev->queues[qid]; 1001aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox int vector = dev->entry[nvmeq->cq_vector].vector; 1002b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1003a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1004a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_cancel_ios(nvmeq, false); 10053295874b6074d749516d6decd43afad7bf6e38ffKeith Busch while (bio_list_peek(&nvmeq->sq_cong)) { 10063295874b6074d749516d6decd43afad7bf6e38ffKeith Busch struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 10073295874b6074d749516d6decd43afad7bf6e38ffKeith Busch bio_endio(bio, -EIO); 10083295874b6074d749516d6decd43afad7bf6e38ffKeith Busch } 1009a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1010a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1011aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox irq_set_affinity_hint(vector, NULL); 1012aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox free_irq(vector, nvmeq); 1013b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1014b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* Don't tell the adapter to delete the admin queue */ 1015b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (qid) { 1016b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 1017b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 1018b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1019b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10209e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox nvme_free_queue_mem(nvmeq); 1021b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1022b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1023b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, 1024b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int depth, int vector) 1025b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1026b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 1027a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch unsigned extra = DIV_ROUND_UP(depth, 8) + (depth * 1028a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch sizeof(struct nvme_cmd_info)); 1029b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq) + extra, GFP_KERNEL); 1030b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq) 1031b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1032b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1033b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cqes = dma_alloc_coherent(dmadev, CQ_SIZE(depth), 1034b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->cq_dma_addr, GFP_KERNEL); 1035b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->cqes) 1036b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 1037b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset((void *)nvmeq->cqes, 0, CQ_SIZE(depth)); 1038b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1039b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds = dma_alloc_coherent(dmadev, SQ_SIZE(depth), 1040b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->sq_dma_addr, GFP_KERNEL); 1041b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->sq_cmds) 1042b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_cqdma; 1043b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1044b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_dmadev = dmadev; 1045091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvmeq->dev = dev; 1046b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_init(&nvmeq->q_lock); 1047b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = 0; 1048821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = 1; 1049b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox init_waitqueue_head(&nvmeq->sq_full); 10501fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox init_waitqueue_entry(&nvmeq->sq_cong_wait, nvme_thread); 1051b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_init(&nvmeq->sq_cong); 1052f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox nvmeq->q_db = &dev->dbs[qid << (dev->db_stride + 1)]; 1053b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_depth = depth; 1054b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_vector = vector; 1055b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1056b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 1057b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1058b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_cqdma: 105968b8eca5f882230e4991df0db0a3094f49420a90Keith Busch dma_free_coherent(dmadev, CQ_SIZE(depth), (void *)nvmeq->cqes, 1060b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_dma_addr); 1061b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 1062b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 1063b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1064b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1065b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10663001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcoxstatic int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, 10673001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox const char *name) 10683001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox{ 106958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if (use_threaded_interrupts) 107058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, 1071ec6ce618d65b5ce1bef83a5509255107a0feac44Matthew Wilcox nvme_irq_check, nvme_irq, 107258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox IRQF_DISABLED | IRQF_SHARED, 107358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox name, nvmeq); 10743001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, 10753001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox IRQF_DISABLED | IRQF_SHARED, name, nvmeq); 10763001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox} 10773001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox 10788d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic struct nvme_queue *nvme_create_queue(struct nvme_dev *dev, int qid, 10798d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartman int cq_size, int vector) 1080b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1081b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int result; 1082b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = nvme_alloc_queue(dev, qid, cq_size, vector); 1083b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10843f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox if (!nvmeq) 10856f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return ERR_PTR(-ENOMEM); 10863f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox 1087b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_cq(dev, qid, nvmeq); 1088b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1089b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 1090b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1091b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_sq(dev, qid, nvmeq); 1092b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1093b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_cq; 1094b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10953001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme"); 1096b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1097b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_sq; 1098b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1099b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 1100b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1101b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_sq: 1102b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 1103b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_cq: 1104b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 1105b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 1106b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 1107b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 1108b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 1109b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 1110b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 11116f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return ERR_PTR(result); 1112b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1113b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1114ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_wait_ready(struct nvme_dev *dev, u64 cap, bool enabled) 1115ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 1116ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox unsigned long timeout; 1117ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox u32 bit = enabled ? NVME_CSTS_RDY : 0; 1118ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1119ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; 1120ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1121ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox while ((readl(&dev->bar->csts) & NVME_CSTS_RDY) != bit) { 1122ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox msleep(100); 1123ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (fatal_signal_pending(current)) 1124ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return -EINTR; 1125ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (time_after(jiffies, timeout)) { 1126ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox dev_err(&dev->pci_dev->dev, 1127ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox "Device not ready; aborting initialisation\n"); 1128ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return -ENODEV; 1129ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox } 1130ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox } 1131ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1132ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return 0; 1133ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1134ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1135ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox/* 1136ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * If the device has been passed off to us in an enabled state, just clear 1137ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * the enabled bit. The spec says we should set the 'shutdown notification 1138ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * bits', but doing so may cause the device to complete commands to the 1139ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * admin queue ... and we don't know what memory that might be pointing at! 1140ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox */ 1141ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_disable_ctrl(struct nvme_dev *dev, u64 cap) 1142ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 114344af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox u32 cc = readl(&dev->bar->cc); 114444af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox 114544af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox if (cc & NVME_CC_ENABLE) 114644af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox writel(cc & ~NVME_CC_ENABLE, &dev->bar->cc); 1147ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return nvme_wait_ready(dev, cap, false); 1148ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1149ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1150ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_enable_ctrl(struct nvme_dev *dev, u64 cap) 1151ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 1152ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return nvme_wait_ready(dev, cap, true); 1153ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1154ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 11558d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_configure_admin_queue(struct nvme_dev *dev) 1156b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1157ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox int result; 1158b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 aqa; 1159ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox u64 cap = readq(&dev->bar->cap); 1160b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq; 1161b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1162b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 1163ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox dev->db_stride = NVME_CAP_STRIDE(cap); 1164ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1165ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox result = nvme_disable_ctrl(dev, cap); 1166ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (result < 0) 1167ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return result; 1168b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1169b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq = nvme_alloc_queue(dev, 0, 64, 0); 11703f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox if (!nvmeq) 11713f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox return -ENOMEM; 1172b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1173b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa = nvmeq->q_depth - 1; 1174b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa |= aqa << 16; 1175b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1176b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config = NVME_CC_ENABLE | NVME_CC_CSS_NVM; 1177b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= (PAGE_SHIFT - 12) << NVME_CC_MPS_SHIFT; 1178b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; 11797f53f9d2424533256ae86f7df5661a17de743de8Matthew Wilcox dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; 1180b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1181b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(aqa, &dev->bar->aqa); 1182b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->sq_dma_addr, &dev->bar->asq); 1183b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->cq_dma_addr, &dev->bar->acq); 1184b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(dev->ctrl_config, &dev->bar->cc); 1185b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1186ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox result = nvme_enable_ctrl(dev, cap); 1187025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch if (result) 1188025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch goto free_q; 11899e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 11903001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme admin"); 1191025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch if (result) 1192025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch goto free_q; 1193025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch 1194b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->queues[0] = nvmeq; 1195b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1196025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch 1197025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch free_q: 1198025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch nvme_free_queue_mem(nvmeq); 1199025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch return result; 1200b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1201b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12025d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermastruct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write, 1203eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned long addr, unsigned length) 1204b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 120536c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox int i, err, count, nents, offset; 12067fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct scatterlist *sg; 12077fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct page **pages; 1208eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 120936c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 121036c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (addr & 3) 1211eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 12125460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter if (!length || length > INT_MAX - PAGE_SIZE) 1213eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 12147fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 121536c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox offset = offset_in_page(addr); 12167fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox count = DIV_ROUND_UP(offset + length, PAGE_SIZE); 12177fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox pages = kcalloc(count, sizeof(*pages), GFP_KERNEL); 121822fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter if (!pages) 121922fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter return ERR_PTR(-ENOMEM); 122036c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 122136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = get_user_pages_fast(addr, count, 1, pages); 122236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (err < count) { 122336c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox count = err; 122436c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = -EFAULT; 122536c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox goto put_pages; 122636c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox } 12277fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 1228eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(count, length, GFP_KERNEL); 1229eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = iod->sg; 123036c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox sg_init_table(sg, count); 1231d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox for (i = 0; i < count; i++) { 1232d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox sg_set_page(&sg[i], pages[i], 12335460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter min_t(unsigned, length, PAGE_SIZE - offset), 12345460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter offset); 1235d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox length -= (PAGE_SIZE - offset); 1236d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox offset = 0; 12377fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox } 1238fe304c43c6d63e29ed4fc46a874d7a74313788c5Matthew Wilcox sg_mark_end(&sg[i - 1]); 12391c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox iod->nents = count; 12407fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 12417fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox err = -ENOMEM; 12427fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox nents = dma_map_sg(&dev->pci_dev->dev, sg, count, 12437fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 124436c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (!nents) 1245eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 1246b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12477fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1248eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 1249b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1250eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 1251eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 12527fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_pages: 12537fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox for (i = 0; i < count; i++) 12547fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_page(pages[i]); 12557fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1256eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(err); 12577fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1258b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12595d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid nvme_unmap_user_pages(struct nvme_dev *dev, int write, 12601c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox struct nvme_iod *iod) 12617fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox{ 12621c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox int i; 1263b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12641c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 12651c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 12667fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 12671c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox for (i = 0; i < iod->nents; i++) 12681c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox put_page(sg_page(&iod->sg[i])); 12697fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1270b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1271a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcoxstatic int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) 1272a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox{ 1273a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_dev *dev = ns->dev; 1274a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_queue *nvmeq; 1275a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_user_io io; 1276a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_command c; 1277f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch unsigned length, meta_len; 1278f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int status, i; 1279f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch struct nvme_iod *iod, *meta_iod = NULL; 1280f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch dma_addr_t meta_dma_addr; 1281f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch void *meta, *uninitialized_var(meta_mem); 1282a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1283a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox if (copy_from_user(&io, uio, sizeof(io))) 1284a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return -EFAULT; 12856c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox length = (io.nblocks + 1) << ns->lba_shift; 1286f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_len = (io.nblocks + 1) * ns->ms; 1287f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1288f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len && ((io.metadata & 3) || !io.metadata)) 1289f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch return -EINVAL; 12906c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 12916c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox switch (io.opcode) { 12926c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_write: 12936c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_read: 12946bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case nvme_cmd_compare: 1295eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_map_user_pages(dev, io.opcode & 1, io.addr, length); 12966413214c5d424fd5aae6567848340f962ad2ce0fMatthew Wilcox break; 12976c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox default: 12986bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EINVAL; 12996c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox } 13006c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 1301eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1302eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1303a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1304a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox memset(&c, 0, sizeof(c)); 1305a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.opcode = io.opcode; 1306a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.flags = io.flags; 13076c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.nsid = cpu_to_le32(ns->ns_id); 1308a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.slba = cpu_to_le64(io.slba); 13096c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.length = cpu_to_le16(io.nblocks); 1310a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.control = cpu_to_le16(io.control); 13111c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); 13121c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.reftag = cpu_to_le32(io.reftag); 13131c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.apptag = cpu_to_le16(io.apptag); 13141c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.appmask = cpu_to_le16(io.appmask); 1315f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1316f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len) { 1317f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod = nvme_map_user_pages(dev, io.opcode & 1, io.metadata, meta_len); 1318f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (IS_ERR(meta_iod)) { 1319f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch status = PTR_ERR(meta_iod); 1320f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod = NULL; 1321f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch goto unmap; 1322f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1323f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1324f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_mem = dma_alloc_coherent(&dev->pci_dev->dev, meta_len, 1325f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch &meta_dma_addr, GFP_KERNEL); 1326f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (!meta_mem) { 1327f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch status = -ENOMEM; 1328f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch goto unmap; 1329f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1330f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1331f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (io.opcode & 1) { 1332f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int meta_offset = 0; 1333f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1334f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch for (i = 0; i < meta_iod->nents; i++) { 1335f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta = kmap_atomic(sg_page(&meta_iod->sg[i])) + 1336f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].offset; 1337f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch memcpy(meta_mem + meta_offset, meta, 1338f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].length); 1339f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch kunmap_atomic(meta); 1340f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_offset += meta_iod->sg[i].length; 1341f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1342f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1343f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1344f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch c.rw.metadata = cpu_to_le64(meta_dma_addr); 1345f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1346f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1347eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, GFP_KERNEL); 1348a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1349040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox nvmeq = get_nvmeq(dev); 1350fa92282149842645931580225647238428374758Matthew Wilcox /* 1351fa92282149842645931580225647238428374758Matthew Wilcox * Since nvme_submit_sync_cmd sleeps, we can't keep preemption 1352b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * disabled. We may be preempted at any point, and be rescheduled 1353b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * to a different CPU. That will cause cacheline bouncing, but no 1354b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * additional races since q_lock already protects against other CPUs. 1355b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox */ 1356a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox put_nvmeq(nvmeq); 1357b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (length != (io.nblocks + 1) << ns->lba_shift) 1358b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1359b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 1360ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox status = nvme_submit_sync_cmd(nvmeq, &c, NULL, NVME_IO_TIMEOUT); 1361a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1362f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len) { 1363f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (status == NVME_SC_SUCCESS && !(io.opcode & 1)) { 1364f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int meta_offset = 0; 1365f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1366f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch for (i = 0; i < meta_iod->nents; i++) { 1367f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta = kmap_atomic(sg_page(&meta_iod->sg[i])) + 1368f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].offset; 1369f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch memcpy(meta, meta_mem + meta_offset, 1370f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].length); 1371f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch kunmap_atomic(meta); 1372f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_offset += meta_iod->sg[i].length; 1373f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1374f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1375f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1376f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch dma_free_coherent(&dev->pci_dev->dev, meta_len, meta_mem, 1377f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_dma_addr); 1378f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1379f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1380f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch unmap: 13811c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, io.opcode & 1, iod); 1382eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 1383f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1384f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_iod) { 1385f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch nvme_unmap_user_pages(dev, io.opcode & 1, meta_iod); 1386f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch nvme_free_iod(dev, meta_iod); 1387f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1388f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1389a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return status; 1390a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox} 1391a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 139250af8baec46a99a9b81a4600c0374f83a5a590a9Keith Buschstatic int nvme_user_admin_cmd(struct nvme_dev *dev, 13936bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd __user *ucmd) 13946ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox{ 13956bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd cmd; 13966ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox struct nvme_command c; 1397eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int status, length; 1398c7d36ab8fa04c213328119a9c0d66985fe204ee5Keith Busch struct nvme_iod *uninitialized_var(iod); 139994f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch unsigned timeout; 14006ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 14016bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (!capable(CAP_SYS_ADMIN)) 14026bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EACCES; 14036bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (copy_from_user(&cmd, ucmd, sizeof(cmd))) 14046ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return -EFAULT; 14056ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 14066ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox memset(&c, 0, sizeof(c)); 14076bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.opcode = cmd.opcode; 14086bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.flags = cmd.flags; 14096bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.nsid = cpu_to_le32(cmd.nsid); 14106bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); 14116bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); 14126bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); 14136bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); 14146bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); 14156bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); 14166bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); 14176bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); 14186bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 14196bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox length = cmd.data_len; 14206bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 1421497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox iod = nvme_map_user_pages(dev, cmd.opcode & 1, cmd.addr, 1422497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox length); 1423eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1424eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1425eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, 1426eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_KERNEL); 14276bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 14286bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 142994f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch timeout = cmd.timeout_ms ? msecs_to_jiffies(cmd.timeout_ms) : 143094f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch ADMIN_TIMEOUT; 14316bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (length != cmd.data_len) 1432b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1433b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 143494f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch status = nvme_submit_sync_cmd(dev->queues[0], &c, &cmd.result, 143594f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch timeout); 1436eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 14376bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 14381c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, cmd.opcode & 1, iod); 1439eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 14406bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 1441f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 1442cf90bc4830b858487fe4b9b9ecd0031e23ca3e83Chayan Biswas if ((status >= 0) && copy_to_user(&ucmd->result, &cmd.result, 1443f4f117f64baf8840d22266d518227b2a186d294bKeith Busch sizeof(cmd.result))) 1444f4f117f64baf8840d22266d518227b2a186d294bKeith Busch status = -EFAULT; 1445f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 14466ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return status; 14476ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox} 14486ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 1449b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, 1450b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long arg) 1451b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1452b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = bdev->bd_disk->private_data; 1453b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1454b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox switch (cmd) { 14556bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ID: 14566bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return ns->ns_id; 14576bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ADMIN_CMD: 145850af8baec46a99a9b81a4600c0374f83a5a590a9Keith Busch return nvme_user_admin_cmd(ns->dev, (void __user *)arg); 1459a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox case NVME_IOCTL_SUBMIT_IO: 1460a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return nvme_submit_io(ns, (void __user *)arg); 14615d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma case SG_GET_VERSION_NUM: 14625d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma return nvme_sg_get_version_num((void __user *)arg); 14635d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma case SG_IO: 14645d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma return nvme_sg_io(ns, (void __user *)arg); 1465b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox default: 1466b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOTTY; 1467b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1468b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1469b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1470b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic const struct block_device_operations nvme_fops = { 1471b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .owner = THIS_MODULE, 1472b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .ioctl = nvme_ioctl, 14734948168280b269a514045766ddd872cfac5968e1Matthew Wilcox .compat_ioctl = nvme_ioctl, 1474b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1475b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14761fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic void nvme_resubmit_bios(struct nvme_queue *nvmeq) 14771fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 14781fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (bio_list_peek(&nvmeq->sq_cong)) { 14791fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 14801fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_ns *ns = bio->bi_bdev->bd_disk->private_data; 1481427e97080196548557b288517537ab7eb48c309fKeith Busch 1482427e97080196548557b288517537ab7eb48c309fKeith Busch if (bio_list_empty(&nvmeq->sq_cong)) 1483427e97080196548557b288517537ab7eb48c309fKeith Busch remove_wait_queue(&nvmeq->sq_full, 1484427e97080196548557b288517537ab7eb48c309fKeith Busch &nvmeq->sq_cong_wait); 14851fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_submit_bio_queue(nvmeq, ns, bio)) { 1486427e97080196548557b288517537ab7eb48c309fKeith Busch if (bio_list_empty(&nvmeq->sq_cong)) 1487427e97080196548557b288517537ab7eb48c309fKeith Busch add_wait_queue(&nvmeq->sq_full, 1488427e97080196548557b288517537ab7eb48c309fKeith Busch &nvmeq->sq_cong_wait); 14891fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox bio_list_add_head(&nvmeq->sq_cong, bio); 14901fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox break; 14911fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 14921fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 14931fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 14941fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 14951fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic int nvme_kthread(void *data) 14961fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 14971fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_dev *dev; 14981fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 14991fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (!kthread_should_stop()) { 1500564a232c059913d91b491e04c2b2d670b8f94615Arjan van de Ven set_current_state(TASK_INTERRUPTIBLE); 15011fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 15021fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_for_each_entry(dev, &dev_list, node) { 15031fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox int i; 15041fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox for (i = 0; i < dev->queue_count; i++) { 15051fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_queue *nvmeq = dev->queues[i]; 1506740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (!nvmeq) 1507740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox continue; 15081fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 15091fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_process_cq(nvmeq)) 15101fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox printk("process_cq did something\n"); 1511a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_cancel_ios(nvmeq, true); 15121fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_resubmit_bios(nvmeq); 15131fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 15141fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 15151fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 15161fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 1517acb7aa0db09b8abd38abeb84334a8a27a52fbb1bArjan van de Ven schedule_timeout(round_jiffies_relative(HZ)); 15181fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 15191fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 15201fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 15211fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 15225aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic DEFINE_IDA(nvme_index_ida); 15235aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 15245aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic int nvme_get_ns_idx(void) 15255aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox{ 15265aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox int index, error; 15275aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 15285aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox do { 15295aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox if (!ida_pre_get(&nvme_index_ida, GFP_KERNEL)) 15305aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox return -1; 15315aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 15325aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_lock(&dev_list_lock); 15335aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox error = ida_get_new(&nvme_index_ida, &index); 15345aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_unlock(&dev_list_lock); 15355aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox } while (error == -EAGAIN); 15365aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 15375aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox if (error) 15385aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox index = -1; 15395aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox return index; 15405aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox} 15415aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 15425aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic void nvme_put_ns_idx(int index) 15435aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox{ 15445aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_lock(&dev_list_lock); 15455aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ida_remove(&nvme_index_ida, index); 15465aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_unlock(&dev_list_lock); 15475aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox} 15485aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 15490e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic void nvme_config_discard(struct nvme_ns *ns) 15500e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 15510e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch u32 logical_block_size = queue_logical_block_size(ns->queue); 15520e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_zeroes_data = 0; 15530e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_alignment = logical_block_size; 15540e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_granularity = logical_block_size; 15550e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.max_discard_sectors = 0xffffffff; 15560e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); 15570e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 15580e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 15595aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, int nsid, 1560b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_id_ns *id, struct nvme_lba_range_type *rt) 1561b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1562b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns; 1563b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct gendisk *disk; 1564b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int lbaf; 1565b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1566b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (rt->attributes & NVME_LBART_ATTRIB_HIDE) 1567b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1568b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1569b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns = kzalloc(sizeof(*ns), GFP_KERNEL); 1570b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns) 1571b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1572b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue = blk_alloc_queue(GFP_KERNEL); 1573b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns->queue) 1574b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_ns; 15754eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox ns->queue->queue_flags = QUEUE_FLAG_DEFAULT; 15764eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue); 15774eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); 1578b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_queue_make_request(ns->queue, nvme_make_request); 1579b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->dev = dev; 1580b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue->queuedata = ns; 1581b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1582b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk = alloc_disk(NVME_MINORS); 1583b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!disk) 1584b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_queue; 15855aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ns->ns_id = nsid; 1586b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->disk = disk; 1587b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox lbaf = id->flbas & 0xf; 1588b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->lba_shift = id->lbaf[lbaf].ds; 1589f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch ns->ms = le16_to_cpu(id->lbaf[lbaf].ms); 1590e9ef46369f5107e634a93b7fc4e62a1f53343197Keith Busch blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); 15918fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch if (dev->max_hw_sectors) 15928fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors); 1593b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1594b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->major = nvme_major; 1595b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->minors = NVME_MINORS; 15965aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox disk->first_minor = NVME_MINORS * nvme_get_ns_idx(); 1597b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->fops = &nvme_fops; 1598b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->private_data = ns; 1599b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->queue = ns->queue; 1600388f037f4e7f0a24bac6b1a24f144f5d939f58cfMatthew Wilcox disk->driverfs_dev = &dev->pci_dev->dev; 16015aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox sprintf(disk->disk_name, "nvme%dn%d", dev->instance, nsid); 1602b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); 1603b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 16040e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (dev->oncs & NVME_CTRL_ONCS_DSM) 16050e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvme_config_discard(ns); 16060e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 1607b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return ns; 1608b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1609b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_queue: 1610b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1611b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_ns: 1612b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1613b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1614b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1615b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1616b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_ns_free(struct nvme_ns *ns) 1617b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 16185aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox int index = ns->disk->first_minor / NVME_MINORS; 1619b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox put_disk(ns->disk); 16205aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox nvme_put_ns_idx(index); 1621b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1622b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1623b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1624b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1625b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcoxstatic int set_queue_count(struct nvme_dev *dev, int count) 1626b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1627b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 1628b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 result; 1629b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcox u32 q_count = (count - 1) | ((count - 1) << 16); 1630b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1631df3481399042200792822b6243e36a95a557b57eMatthew Wilcox status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0, 1632bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox &result); 1633b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 1634b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 1635b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return min(result & 0xffff, result >> 16) + 1; 1636b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1637b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 16388d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_setup_io_queues(struct nvme_dev *dev) 1639b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1640fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula struct pci_dev *pdev = dev->pci_dev; 1641063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox int result, cpu, i, vecs, nr_io_queues, db_bar_size, q_depth; 1642b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1643b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = num_online_cpus(); 1644b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox result = set_queue_count(dev, nr_io_queues); 16451b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox if (result < 0) 16461b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox return result; 1647b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox if (result < nr_io_queues) 1648b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = result; 1649b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 16501b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox /* Deregister the admin queue's interrupt */ 16511b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox free_irq(dev->entry[0].vector, dev->queues[0]); 16521b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1653f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox db_bar_size = 4096 + ((nr_io_queues + 1) << (dev->db_stride + 3)); 1654f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox if (db_bar_size > 8192) { 1655f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox iounmap(dev->bar); 1656fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula dev->bar = ioremap(pci_resource_start(pdev, 0), db_bar_size); 1657f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 1658f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->queues[0]->q_db = dev->dbs; 1659f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox } 1660f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox 1661063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = nr_io_queues; 1662063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox for (i = 0; i < vecs; i++) 16631b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->entry[i].entry = i; 16641b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox for (;;) { 1665063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox result = pci_enable_msix(pdev, dev->entry, vecs); 1666063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox if (result <= 0) 16671b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox break; 1668063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = result; 16691b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 16701b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1671063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox if (result < 0) { 1672063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = nr_io_queues; 1673063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox if (vecs > 32) 1674063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = 32; 1675fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula for (;;) { 1676063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox result = pci_enable_msi_block(pdev, vecs); 1677fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula if (result == 0) { 1678063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox for (i = 0; i < vecs; i++) 1679fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula dev->entry[i].vector = i + pdev->irq; 1680fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula break; 1681063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox } else if (result < 0) { 1682063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = 1; 1683fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula break; 1684fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula } 1685063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = result; 1686fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula } 1687fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula } 1688fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula 1689063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox /* 1690063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * Should investigate if there's a performance win from allocating 1691063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * more queues than interrupt vectors; it might allow the submission 1692063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * path to scale better, even if the receive path is limited by the 1693063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * number of interrupts. 1694063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox */ 1695063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox nr_io_queues = vecs; 1696063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox 16971b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox result = queue_request_irq(dev, dev->queues[0], "nvme admin"); 16981b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox /* XXX: handle failure here */ 16991b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 17001b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_first(cpu_online_mask); 1701b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) { 17021b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox irq_set_affinity_hint(dev->entry[i].vector, get_cpu_mask(cpu)); 17031b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_next(cpu, cpu_online_mask); 17041b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 17051b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1706a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch q_depth = min_t(int, NVME_CAP_MQES(readq(&dev->bar->cap)) + 1, 1707a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch NVME_Q_DEPTH); 1708b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) { 1709a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch dev->queues[i + 1] = nvme_create_queue(dev, i + 1, q_depth, i); 17106f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox if (IS_ERR(dev->queues[i + 1])) 17116f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return PTR_ERR(dev->queues[i + 1]); 17121b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queue_count++; 17131b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 1714b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 17159ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox for (; i < num_possible_cpus(); i++) { 17169ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox int target = i % rounddown_pow_of_two(dev->queue_count - 1); 17179ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox dev->queues[i + 1] = dev->queues[target + 1]; 17189ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox } 17199ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox 1720b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1721b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1722b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1723b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_free_queues(struct nvme_dev *dev) 1724b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1725b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int i; 1726b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1727b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (i = dev->queue_count - 1; i >= 0; i--) 1728b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queue(dev, i); 1729b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1730b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1731422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox/* 1732422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * Return: error value if an error occurred setting up the queues or calling 1733422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * Identify Device. 0 if these succeeded, even if adding some of the 1734422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * namespaces failed. At the moment, these failures are silent. TBD which 1735422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * failures should be reported. 1736422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox */ 17378d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_dev_add(struct nvme_dev *dev) 1738b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1739b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int res, nn, i; 1740cbb6218fd4ae8f98ddf0d66f0826a7a3a9c88298Keith Busch struct nvme_ns *ns; 174151814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox struct nvme_id_ctrl *ctrl; 1742bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_id_ns *id_ns; 1743bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox void *mem; 1744b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t dma_addr; 1745159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12; 1746b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1747b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = nvme_setup_io_queues(dev); 1748b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1749b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 1750b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1751bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox mem = dma_alloc_coherent(&dev->pci_dev->dev, 8192, &dma_addr, 1752b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 1753a9ef4343afbe67a6abf83c0f0294e80db48e513aKeith Busch if (!mem) 1754a9ef4343afbe67a6abf83c0f0294e80db48e513aKeith Busch return -ENOMEM; 1755b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1756bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, 0, 1, dma_addr); 1757b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) { 1758b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = -EIO; 1759cbb6218fd4ae8f98ddf0d66f0826a7a3a9c88298Keith Busch goto out; 1760b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1761b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1762bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ctrl = mem; 176351814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox nn = le32_to_cpup(&ctrl->nn); 17640e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch dev->oncs = le16_to_cpup(&ctrl->oncs); 176551814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn)); 176651814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn)); 176751814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr)); 1768159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if (ctrl->mdts) 17698fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch dev->max_hw_sectors = 1 << (ctrl->mdts + shift - 9); 1770159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if ((dev->pci_dev->vendor == PCI_VENDOR_ID_INTEL) && 1771159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch (dev->pci_dev->device == 0x0953) && ctrl->vs[3]) 1772159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch dev->stripe_size = 1 << (ctrl->vs[3] + shift); 1773b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1774bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox id_ns = mem; 17752b2c1896871838cdf549442e8ad0264be5fa74e3Matthew Wilcox for (i = 1; i <= nn; i++) { 1776bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, i, 0, dma_addr); 1777b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1778b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1779b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1780bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox if (id_ns->ncap == 0) 1781b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1782b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1783bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_get_features(dev, NVME_FEAT_LBA_RANGE, i, 178408df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr + 4096, NULL); 1785b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1786122090366d1d5c6ec1bfb6dfdb3a6d121ff074aaKeith Busch memset(mem + 4096, 0, 4096); 1787b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1788bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ns = nvme_alloc_ns(dev, i, mem, mem + 4096); 1789b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (ns) 1790b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_add_tail(&ns->list, &dev->namespaces); 1791b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1792b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry(ns, &dev->namespaces, list) 1793b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox add_disk(ns->disk); 1794422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox res = 0; 1795b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1796bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox out: 1797684f5c2025b067a23722e620d0b3b858d8dc5d01Matthew Wilcox dma_free_coherent(&dev->pci_dev->dev, 8192, mem, dma_addr); 1798b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 1799b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1800b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1801b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_dev_remove(struct nvme_dev *dev) 1802b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1803b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns, *next; 1804b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 18051fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 18061fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_del(&dev->node); 18071fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 18081fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 1809b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 1810b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_del(&ns->list); 1811b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox del_gendisk(ns->disk); 1812b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_ns_free(ns); 1813b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1814b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1815b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queues(dev); 1816b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1817b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1818b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1819b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1820091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic int nvme_setup_prp_pools(struct nvme_dev *dev) 1821091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 1822091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 1823091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dev->prp_page_pool = dma_pool_create("prp list page", dmadev, 1824091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox PAGE_SIZE, PAGE_SIZE, 0); 1825091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (!dev->prp_page_pool) 1826091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return -ENOMEM; 1827091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 182899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox /* Optimisation for I/Os between 4k and 128k */ 182999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dev->prp_small_pool = dma_pool_create("prp list 256", dmadev, 183099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 256, 256, 0); 183199802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (!dev->prp_small_pool) { 183299802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 183399802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox return -ENOMEM; 183499802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 1835091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return 0; 1836091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 1837091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1838091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic void nvme_release_prp_pools(struct nvme_dev *dev) 1839091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 1840091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 184199802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_small_pool); 1842091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 1843091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1844cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic DEFINE_IDA(nvme_instance_ida); 1845cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1846cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic int nvme_set_instance(struct nvme_dev *dev) 1847b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1848cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh int instance, error; 1849cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1850cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh do { 1851cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (!ida_pre_get(&nvme_instance_ida, GFP_KERNEL)) 1852cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 1853cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1854cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 1855cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh error = ida_get_new(&nvme_instance_ida, &instance); 1856cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 1857cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh } while (error == -EAGAIN); 1858cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1859cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (error) 1860cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 1861cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1862cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh dev->instance = instance; 1863cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return 0; 1864b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1865b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1866b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_release_instance(struct nvme_dev *dev) 1867b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1868cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 1869cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh ida_remove(&nvme_instance_ida, dev->instance); 1870cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 1871b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1872b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 18735e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic void nvme_free_dev(struct kref *kref) 18745e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 18755e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = container_of(kref, struct nvme_dev, kref); 18765e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_dev_remove(dev); 1877fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula if (dev->pci_dev->msi_enabled) 1878fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula pci_disable_msi(dev->pci_dev); 1879fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula else if (dev->pci_dev->msix_enabled) 1880fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula pci_disable_msix(dev->pci_dev); 18815e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch iounmap(dev->bar); 18825e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_release_instance(dev); 18835e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_release_prp_pools(dev); 18845e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch pci_disable_device(dev->pci_dev); 18855e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch pci_release_regions(dev->pci_dev); 18865e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev->queues); 18875e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev->entry); 18885e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev); 18895e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 18905e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 18915e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic int nvme_dev_open(struct inode *inode, struct file *f) 18925e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 18935e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = container_of(f->private_data, struct nvme_dev, 18945e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch miscdev); 18955e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_get(&dev->kref); 18965e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch f->private_data = dev; 18975e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return 0; 18985e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 18995e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 19005e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic int nvme_dev_release(struct inode *inode, struct file *f) 19015e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 19025e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = f->private_data; 19035e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_put(&dev->kref, nvme_free_dev); 19045e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return 0; 19055e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 19065e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 19075e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic long nvme_dev_ioctl(struct file *f, unsigned int cmd, unsigned long arg) 19085e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 19095e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = f->private_data; 19105e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch switch (cmd) { 19115e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch case NVME_IOCTL_ADMIN_CMD: 19125e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return nvme_user_admin_cmd(dev, (void __user *)arg); 19135e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch default: 19145e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return -ENOTTY; 19155e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch } 19165e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 19175e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 19185e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic const struct file_operations nvme_dev_fops = { 19195e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .owner = THIS_MODULE, 19205e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .open = nvme_dev_open, 19215e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .release = nvme_dev_release, 19225e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .unlocked_ioctl = nvme_dev_ioctl, 19235e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .compat_ioctl = nvme_dev_ioctl, 19245e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch}; 19255e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 19268d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) 1927b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1928574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox int bars, result = -ENOMEM; 1929b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev; 1930b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1931b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev = kzalloc(sizeof(*dev), GFP_KERNEL); 1932b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev) 1933b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOMEM; 1934b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->entry = kcalloc(num_possible_cpus(), sizeof(*dev->entry), 1935b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 1936b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->entry) 1937b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 19381b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queues = kcalloc(num_possible_cpus() + 1, sizeof(void *), 19391b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox GFP_KERNEL); 1940b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->queues) 1941b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 1942b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 19430ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews if (pci_enable_device_mem(pdev)) 19440ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews goto free; 1945f64d3365a3e5cb46e69db7e2c82a7cb9a5bed1b8Matthew Wilcox pci_set_master(pdev); 1946574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox bars = pci_select_bars(pdev, IORESOURCE_MEM); 1947574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox if (pci_request_selected_regions(pdev, bars, "nvme")) 1948574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox goto disable; 19490ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews 1950b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox INIT_LIST_HEAD(&dev->namespaces); 1951b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->pci_dev = pdev; 1952b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_set_drvdata(pdev, dev); 1953cf9f123b38345b2c2777e642eb9bb561f4b7de91Matthew Wilcox 1954cf9f123b38345b2c2777e642eb9bb561f4b7de91Matthew Wilcox if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) 1955cf9f123b38345b2c2777e642eb9bb561f4b7de91Matthew Wilcox dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); 1956cf9f123b38345b2c2777e642eb9bb561f4b7de91Matthew Wilcox else if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) 1957cf9f123b38345b2c2777e642eb9bb561f4b7de91Matthew Wilcox dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); 1958cf9f123b38345b2c2777e642eb9bb561f4b7de91Matthew Wilcox else 1959cf9f123b38345b2c2777e642eb9bb561f4b7de91Matthew Wilcox goto disable; 1960cf9f123b38345b2c2777e642eb9bb561f4b7de91Matthew Wilcox 1961cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh result = nvme_set_instance(dev); 1962cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (result) 1963cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh goto disable; 1964cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 196553c9577e9ca68a633c6e9df2b54eaecacfa77f62Matthew Wilcox dev->entry[0].vector = pdev->irq; 1966b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1967091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox result = nvme_setup_prp_pools(dev); 1968091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (result) 1969091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox goto disable_msix; 1970091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1971b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); 1972b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->bar) { 1973b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = -ENOMEM; 1974574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox goto disable_msix; 1975b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1976b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1977b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = nvme_configure_admin_queue(dev); 1978b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 1979b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto unmap; 1980b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->queue_count++; 1981b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 19821fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 19831fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_add(&dev->node, &dev_list); 19841fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 19851fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 1986740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox result = nvme_dev_add(dev); 1987740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (result) 1988740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox goto delete; 1989740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 19905e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch scnprintf(dev->name, sizeof(dev->name), "nvme%d", dev->instance); 19915e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.minor = MISC_DYNAMIC_MINOR; 19925e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.parent = &pdev->dev; 19935e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.name = dev->name; 19945e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.fops = &nvme_dev_fops; 19955e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch result = misc_register(&dev->miscdev); 19965e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch if (result) 19975e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch goto remove; 19985e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 19995e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_init(&dev->kref); 2000b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 2001b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 20025e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch remove: 20035e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_dev_remove(dev); 2004b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox delete: 2005740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox spin_lock(&dev_list_lock); 2006740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox list_del(&dev->node); 2007740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox spin_unlock(&dev_list_lock); 2008740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 2009b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queues(dev); 2010b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unmap: 2011b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox iounmap(dev->bar); 2012574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox disable_msix: 2013fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula if (dev->pci_dev->msi_enabled) 2014fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula pci_disable_msi(dev->pci_dev); 2015fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula else if (dev->pci_dev->msix_enabled) 2016fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula pci_disable_msix(dev->pci_dev); 2017b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_release_instance(dev); 2018091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvme_release_prp_pools(dev); 2019574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox disable: 20200ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews pci_disable_device(pdev); 2021574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox pci_release_regions(pdev); 2022b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free: 2023b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->queues); 2024b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->entry); 2025b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev); 2026b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 2027b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2028b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 20298d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic void nvme_remove(struct pci_dev *pdev) 2030b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2031b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev = pci_get_drvdata(pdev); 20325e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch misc_deregister(&dev->miscdev); 20335e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_put(&dev->kref, nvme_free_dev); 2034b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2035b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2036b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* These functions are yet to be implemented */ 2037b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_detected NULL 2038b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_dump_registers NULL 2039b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_link_reset NULL 2040b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_slot_reset NULL 2041b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_resume NULL 2042b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_suspend NULL 2043b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_resume NULL 2044b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 20451d3520357df99baf4ad89f86268ac96cd38092d9Stephen Hemmingerstatic const struct pci_error_handlers nvme_err_handler = { 2046b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .error_detected = nvme_error_detected, 2047b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .mmio_enabled = nvme_dump_registers, 2048b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .link_reset = nvme_link_reset, 2049b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .slot_reset = nvme_slot_reset, 2050b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_error_resume, 2051b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2052b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2053b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* Move to pci_ids.h later */ 2054b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define PCI_CLASS_STORAGE_EXPRESS 0x010802 2055b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2056b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic DEFINE_PCI_DEVICE_TABLE(nvme_id_table) = { 2057b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, 2058b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { 0, } 2059b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2060b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_DEVICE_TABLE(pci, nvme_id_table); 2061b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2062b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct pci_driver nvme_driver = { 2063b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .name = "nvme", 2064b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .id_table = nvme_id_table, 2065b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .probe = nvme_probe, 20668d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartman .remove = nvme_remove, 2067b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .suspend = nvme_suspend, 2068b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_resume, 2069b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .err_handler = &nvme_err_handler, 2070b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2071b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2072b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __init nvme_init(void) 2073b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 20740ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox int result; 20751fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 20761fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); 20771fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (IS_ERR(nvme_thread)) 20781fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return PTR_ERR(nvme_thread); 2079b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 20805c42ea1643a630060f9e71e06d3933d244970967Keith Busch result = register_blkdev(nvme_major, "nvme"); 20815c42ea1643a630060f9e71e06d3933d244970967Keith Busch if (result < 0) 20821fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto kill_kthread; 20835c42ea1643a630060f9e71e06d3933d244970967Keith Busch else if (result > 0) 20840ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox nvme_major = result; 2085b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2086b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = pci_register_driver(&nvme_driver); 20871fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (result) 20881fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto unregister_blkdev; 20891fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 2090b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 20911fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox unregister_blkdev: 2092b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 20931fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kill_kthread: 20941fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 2095b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 2096b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2097b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2098b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void __exit nvme_exit(void) 2099b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2100b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_unregister_driver(&nvme_driver); 2101b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 21021fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 2103b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2104b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2105b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); 2106b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_LICENSE("GPL"); 2107366e8217e5ec6ce9f73aec19c46d983110fb4a98Matthew WilcoxMODULE_VERSION("0.8"); 2108b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_init(nvme_init); 2109b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_exit(nvme_exit); 2110