nvme-core.c revision 427e97080196548557b288517537ab7eb48c309f
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; 522427e97080196548557b288517537ab7eb48c309fKeith Busch int i, length = 0, nsegs = 0; 523b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 524eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg_init_table(iod->sg, psegs); 525b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_for_each_segment(bvec, bio, i) { 526768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox if (bvprv && BIOVEC_PHYS_MERGEABLE(bvprv, bvec)) { 527768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg->length += bvec->bv_len; 528768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } else { 5291ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox if (bvprv && BIOVEC_NOT_VIRT_MERGEABLE(bvprv, bvec)) 530427e97080196548557b288517537ab7eb48c309fKeith Busch return nvme_split_and_submit(bio, nvmeq, i, 531427e97080196548557b288517537ab7eb48c309fKeith Busch length, 0); 532427e97080196548557b288517537ab7eb48c309fKeith Busch 533eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = sg ? sg + 1 : iod->sg; 534768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_set_page(sg, bvec->bv_page, bvec->bv_len, 535768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvec->bv_offset); 536768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox nsegs++; 537768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } 5381ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox length += bvec->bv_len; 539768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvprv = bvec; 540b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 541eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->nents = nsegs; 542768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_mark_end(sg); 543427e97080196548557b288517537ab7eb48c309fKeith Busch if (dma_map_sg(nvmeq->q_dmadev, iod->sg, iod->nents, dma_dir) == 0) 5441ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return -ENOMEM; 545427e97080196548557b288517537ab7eb48c309fKeith Busch 5461ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return length; 547b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 548b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 5490e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch/* 5500e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * We reuse the small pool to allocate the 16-byte range here as it is not 5510e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * worth having a special pool for these or additional cases to handle freeing 5520e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * the iod. 5530e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch */ 5540e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic int nvme_submit_discard(struct nvme_queue *nvmeq, struct nvme_ns *ns, 5550e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct bio *bio, struct nvme_iod *iod, int cmdid) 5560e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 5570e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct nvme_dsm_range *range; 5580e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 5590e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5600e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range = dma_pool_alloc(nvmeq->dev->prp_small_pool, GFP_ATOMIC, 5610e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch &iod->first_dma); 5620e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (!range) 5630e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return -ENOMEM; 5640e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5650e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch iod_list(iod)[0] = (__le64 *)range; 5660e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch iod->npages = 0; 5670e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5680e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range->cattr = cpu_to_le32(0); 5690e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range->nlb = cpu_to_le32(bio->bi_size >> ns->lba_shift); 570063cc6d5591ea9c0631b81ac5c7b829d99738b2fMatthew Wilcox range->slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_sector)); 5710e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5720e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch memset(cmnd, 0, sizeof(*cmnd)); 5730e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.opcode = nvme_cmd_dsm; 5740e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.command_id = cmdid; 5750e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nsid = cpu_to_le32(ns->ns_id); 5760e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.prp1 = cpu_to_le64(iod->first_dma); 5770e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nr = 0; 5780e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); 5790e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5800e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (++nvmeq->sq_tail == nvmeq->q_depth) 5810e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvmeq->sq_tail = 0; 5820e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch writel(nvmeq->sq_tail, nvmeq->q_db); 5830e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5840e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return 0; 5850e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 5860e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 58700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcoxstatic int nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns, 58800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid) 58900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 59000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 59100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 59200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 59300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.opcode = nvme_cmd_flush; 59400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.command_id = cmdid; 59500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.nsid = cpu_to_le32(ns->ns_id); 59600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 59700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 59800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox nvmeq->sq_tail = 0; 59900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 60000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 60100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return 0; 60200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 60300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 6045d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns) 60500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 60600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid = alloc_cmdid(nvmeq, (void *)CMD_CTX_FLUSH, 607ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox special_completion, NVME_IO_TIMEOUT); 60800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (unlikely(cmdid < 0)) 60900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return cmdid; 61000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 61100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 61200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 61300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 614184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 615184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 616184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 617b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns, 618b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio) 619b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 620ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox struct nvme_command *cmnd; 621eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 622b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox enum dma_data_direction dma_dir; 6231ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox int cmdid, length, result = -ENOMEM; 624b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 control; 625b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 dsmgmt; 626b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int psegs = bio_phys_segments(ns->queue, bio); 627b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 62800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && psegs) { 62900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox result = nvme_submit_flush_data(nvmeq, ns); 63000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (result) 63100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return result; 63200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox } 63300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 634eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(psegs, bio->bi_size, GFP_ATOMIC); 635eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!iod) 636eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox goto nomem; 637eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->private = bio; 638b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 639eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox result = -EBUSY; 640ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox cmdid = alloc_cmdid(nvmeq, iod, bio_completion, NVME_IO_TIMEOUT); 641b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (unlikely(cmdid < 0)) 642eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 643b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 6440e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (bio->bi_rw & REQ_DISCARD) { 6450e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch result = nvme_submit_discard(nvmeq, ns, bio, iod, cmdid); 6460e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (result) 6470e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch goto free_cmdid; 6480e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return result; 6490e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch } 65000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && !psegs) 65100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 65200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 653b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control = 0; 654b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_FUA) 655b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_FUA; 656b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & (REQ_FAILFAST_DEV | REQ_RAHEAD)) 657b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_LR; 658b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 659b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt = 0; 660b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_RAHEAD) 661b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; 662b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 663ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 664b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 665b8deb62cf271fa9381edc8cf52bcae2f0225c55aMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 666b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio_data_dir(bio)) { 667ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_write; 668b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_TO_DEVICE; 669b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } else { 670ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_read; 671b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_FROM_DEVICE; 672b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 673b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 674427e97080196548557b288517537ab7eb48c309fKeith Busch result = nvme_map_bio(nvmeq, iod, bio, dma_dir, psegs); 675427e97080196548557b288517537ab7eb48c309fKeith Busch if (result <= 0) 676859361a228258edf4821d9f5635825033eca78e8Keith Busch goto free_cmdid; 6771ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox length = result; 678b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 679ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.command_id = cmdid; 680ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.nsid = cpu_to_le32(ns->ns_id); 681eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(nvmeq->dev, &cmnd->common, iod, length, 682eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_ATOMIC); 683063cc6d5591ea9c0631b81ac5c7b829d99738b2fMatthew Wilcox cmnd->rw.slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_sector)); 6841ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox cmnd->rw.length = cpu_to_le16((length >> ns->lba_shift) - 1); 685ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.control = cpu_to_le16(control); 686ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); 687b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 688b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 689b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = 0; 6907547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 691b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 6921974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox return 0; 6931974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox 694859361a228258edf4821d9f5635825033eca78e8Keith Busch free_cmdid: 695859361a228258edf4821d9f5635825033eca78e8Keith Busch free_cmdid(nvmeq, cmdid, NULL); 696eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 697eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(nvmeq->dev, iod); 698eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox nomem: 699eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox return result; 700b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 701b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 70293c3d65b28bab6da520c2add9cb387a0303f8b2dLinus Torvaldsstatic void nvme_make_request(struct request_queue *q, struct bio *bio) 703b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 704b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = q->queuedata; 705040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox struct nvme_queue *nvmeq = get_nvmeq(ns->dev); 706eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox int result = -EBUSY; 707eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox 708eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 709eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 710eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox result = nvme_submit_bio_queue(nvmeq, ns, bio); 711eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (unlikely(result)) { 712eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 713eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 714b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_add(&nvmeq->sq_cong, bio); 715b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 716eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox 717eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 718b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox put_nvmeq(nvmeq); 719b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 720b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 721b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_process_cq(struct nvme_queue *nvmeq) 722b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 723821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox u16 head, phase; 724b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 725b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = nvmeq->cq_head; 726821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = nvmeq->cq_phase; 727b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 728b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (;;) { 729c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 730c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 731b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion cqe = nvmeq->cqes[head]; 732821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != phase) 733b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox break; 734b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_head = le16_to_cpu(cqe.sq_head); 735b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++head == nvmeq->q_depth) { 736b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = 0; 737821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = !phase; 738b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 739b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 740c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = free_cmdid(nvmeq, cqe.command_id, &fn); 7415c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox fn(nvmeq->dev, ctx, &cqe); 742b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 743b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 744b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* If the controller ignores the cq head doorbell and continuously 745b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * writes to the queue, it is theoretically possible to wrap around 746b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the queue twice and mistakenly return IRQ_NONE. Linux only 747b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * requires that 0.1% of your interrupts are handled, so this isn't 748b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * a big problem. 749b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 750821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) 751b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return IRQ_NONE; 752b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 753f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox writel(head, nvmeq->q_db + (1 << nvmeq->dev->db_stride)); 754b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = head; 755821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = phase; 756b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 757b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return IRQ_HANDLED; 758b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 759b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 760b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_irq(int irq, void *data) 761b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 76258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox irqreturn_t result; 76358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 76458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_lock(&nvmeq->q_lock); 76558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox result = nvme_process_cq(nvmeq); 76658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_unlock(&nvmeq->q_lock); 76758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return result; 76858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 76958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 77058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic irqreturn_t nvme_irq_check(int irq, void *data) 77158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox{ 77258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 77358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; 77458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) 77558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_NONE; 77658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_WAKE_THREAD; 77758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 77858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 7793c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcoxstatic void nvme_abort_command(struct nvme_queue *nvmeq, int cmdid) 7803c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 7813c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 782c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cancel_cmdid(nvmeq, cmdid, NULL); 7833c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 7843c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 7853c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 786c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstruct sync_cmd_info { 787c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct task_struct *task; 788c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox u32 result; 789c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox int status; 790c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox}; 791c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 7925c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void sync_completion(struct nvme_dev *dev, void *ctx, 793c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 794c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 795c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct sync_cmd_info *cmdinfo = ctx; 796c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->result = le32_to_cpup(&cqe->result); 797c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; 798c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox wake_up_process(cmdinfo->task); 799c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 800c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 801b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 802b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Returns 0 on success. If the result is negative, it's a Linux error code; 803b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * if the result is positive, it's an NVM Express status code 804b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 8055d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_sync_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd, 8065d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma u32 *result, unsigned timeout) 807b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 808b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 809b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct sync_cmd_info cmdinfo; 810b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 811b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.task = current; 812b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.status = -EINTR; 813b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 814c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdid = alloc_cmdid_killable(nvmeq, &cmdinfo, sync_completion, 815e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox timeout); 816b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid < 0) 817b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 818b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmd->common.command_id = cmdid; 819b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8203c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox set_current_state(TASK_KILLABLE); 8213c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_submit_cmd(nvmeq, cmd); 822b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox schedule(); 823b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8243c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox if (cmdinfo.status == -EINTR) { 8253c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_abort_command(nvmeq, cmdid); 8263c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox return -EINTR; 8273c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox } 8283c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 829b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 830b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox *result = cmdinfo.result; 831b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 832b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdinfo.status; 833b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 834b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8355d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd, 836b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 *result) 837b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 838e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return nvme_submit_sync_cmd(dev->queues[0], cmd, result, ADMIN_TIMEOUT); 839b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 840b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 841b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) 842b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 843b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 844b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 845b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 846b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 847b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.opcode = opcode; 848b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.qid = cpu_to_le16(id); 849b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 850b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 851b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 852b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 853b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 854b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 855b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 856b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, 857b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 858b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 859b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 860b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 861b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; 862b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 863b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 864b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.opcode = nvme_admin_create_cq; 865b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); 866b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cqid = cpu_to_le16(qid); 867b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 868b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cq_flags = cpu_to_le16(flags); 869b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); 870b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 871b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 872b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 873b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 874b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 875b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 876b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 877b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, 878b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 879b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 880b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 881b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 882b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; 883b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 884b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 885b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.opcode = nvme_admin_create_sq; 886b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); 887b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sqid = cpu_to_le16(qid); 888b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 889b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sq_flags = cpu_to_le16(flags); 890b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.cqid = cpu_to_le16(qid); 891b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 892b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 893b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 894b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 895b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 896b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 897b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 898b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) 899b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 900b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); 901b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 902b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 903b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) 904b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 905b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); 906b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 907b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9085d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns, 909bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox dma_addr_t dma_addr) 910bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 911bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 912bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 913bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 914bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.opcode = nvme_admin_identify; 915bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.nsid = cpu_to_le32(nsid); 916bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.prp1 = cpu_to_le64(dma_addr); 917bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.cns = cpu_to_le32(cns); 918bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 919bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, NULL); 920bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 921bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 9225d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid, 92308df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr_t dma_addr, u32 *result) 924bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 925bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 926bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 927bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 928bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.opcode = nvme_admin_get_features; 929a42ceccef0c43b46ff6bc1b12a7c1076ef243df1Keith Busch c.features.nsid = cpu_to_le32(nsid); 930bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 931bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.fid = cpu_to_le32(fid); 932bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 93308df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch return nvme_submit_admin_cmd(dev, &c, result); 934df3481399042200792822b6243e36a95a557b57eMatthew Wilcox} 935df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 9365d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11, 9375d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma dma_addr_t dma_addr, u32 *result) 938df3481399042200792822b6243e36a95a557b57eMatthew Wilcox{ 939df3481399042200792822b6243e36a95a557b57eMatthew Wilcox struct nvme_command c; 940df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 941df3481399042200792822b6243e36a95a557b57eMatthew Wilcox memset(&c, 0, sizeof(c)); 942df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.opcode = nvme_admin_set_features; 943df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 944df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.fid = cpu_to_le32(fid); 945df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.dword11 = cpu_to_le32(dword11); 946df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 947bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, result); 948bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 949bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 950a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox/** 951a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * nvme_cancel_ios - Cancel outstanding I/Os 952a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @queue: The queue to cancel I/Os on 953a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @timeout: True to only cancel I/Os which have timed out 954a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox */ 955a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcoxstatic void nvme_cancel_ios(struct nvme_queue *nvmeq, bool timeout) 956a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox{ 957a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int depth = nvmeq->q_depth - 1; 958a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 959a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox unsigned long now = jiffies; 960a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int cmdid; 961a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 962a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox for_each_set_bit(cmdid, nvmeq->cmdid_data, depth) { 963a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox void *ctx; 964a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_completion_fn fn; 965a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox static struct nvme_completion cqe = { 966af2d9ca744af5e03390eeb3864d08ce75c860899Matthew Wilcox .status = cpu_to_le16(NVME_SC_ABORT_REQ << 1), 967a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox }; 968a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 969a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox if (timeout && !time_after(now, info[cmdid].timeout)) 970a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox continue; 971a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox dev_warn(nvmeq->q_dmadev, "Cancelling I/O %d\n", cmdid); 972a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox ctx = cancel_cmdid(nvmeq, cmdid, &fn); 973a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox fn(nvmeq->dev, ctx, &cqe); 974a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox } 975a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox} 976a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 9779e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcoxstatic void nvme_free_queue_mem(struct nvme_queue *nvmeq) 9789e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox{ 9799e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 9809e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 9819e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 9829e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 9839e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox kfree(nvmeq); 9849e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox} 9859e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 986b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_free_queue(struct nvme_dev *dev, int qid) 987b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 988b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = dev->queues[qid]; 989aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox int vector = dev->entry[nvmeq->cq_vector].vector; 990b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 991a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 992a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_cancel_ios(nvmeq, false); 9933295874b6074d749516d6decd43afad7bf6e38ffKeith Busch while (bio_list_peek(&nvmeq->sq_cong)) { 9943295874b6074d749516d6decd43afad7bf6e38ffKeith Busch struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 9953295874b6074d749516d6decd43afad7bf6e38ffKeith Busch bio_endio(bio, -EIO); 9963295874b6074d749516d6decd43afad7bf6e38ffKeith Busch } 997a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 998a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 999aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox irq_set_affinity_hint(vector, NULL); 1000aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox free_irq(vector, nvmeq); 1001b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1002b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* Don't tell the adapter to delete the admin queue */ 1003b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (qid) { 1004b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 1005b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 1006b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1007b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10089e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox nvme_free_queue_mem(nvmeq); 1009b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1010b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1011b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, 1012b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int depth, int vector) 1013b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1014b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 1015a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch unsigned extra = DIV_ROUND_UP(depth, 8) + (depth * 1016a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch sizeof(struct nvme_cmd_info)); 1017b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq) + extra, GFP_KERNEL); 1018b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq) 1019b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1020b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1021b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cqes = dma_alloc_coherent(dmadev, CQ_SIZE(depth), 1022b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->cq_dma_addr, GFP_KERNEL); 1023b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->cqes) 1024b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 1025b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset((void *)nvmeq->cqes, 0, CQ_SIZE(depth)); 1026b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1027b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds = dma_alloc_coherent(dmadev, SQ_SIZE(depth), 1028b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->sq_dma_addr, GFP_KERNEL); 1029b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->sq_cmds) 1030b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_cqdma; 1031b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1032b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_dmadev = dmadev; 1033091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvmeq->dev = dev; 1034b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_init(&nvmeq->q_lock); 1035b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = 0; 1036821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = 1; 1037b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox init_waitqueue_head(&nvmeq->sq_full); 10381fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox init_waitqueue_entry(&nvmeq->sq_cong_wait, nvme_thread); 1039b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_init(&nvmeq->sq_cong); 1040f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox nvmeq->q_db = &dev->dbs[qid << (dev->db_stride + 1)]; 1041b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_depth = depth; 1042b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_vector = vector; 1043b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1044b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 1045b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1046b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_cqdma: 104768b8eca5f882230e4991df0db0a3094f49420a90Keith Busch dma_free_coherent(dmadev, CQ_SIZE(depth), (void *)nvmeq->cqes, 1048b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_dma_addr); 1049b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 1050b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 1051b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1052b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1053b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10543001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcoxstatic int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, 10553001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox const char *name) 10563001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox{ 105758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if (use_threaded_interrupts) 105858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, 1059ec6ce618d65b5ce1bef83a5509255107a0feac44Matthew Wilcox nvme_irq_check, nvme_irq, 106058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox IRQF_DISABLED | IRQF_SHARED, 106158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox name, nvmeq); 10623001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, 10633001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox IRQF_DISABLED | IRQF_SHARED, name, nvmeq); 10643001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox} 10653001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox 10668d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic struct nvme_queue *nvme_create_queue(struct nvme_dev *dev, int qid, 10678d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartman int cq_size, int vector) 1068b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1069b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int result; 1070b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = nvme_alloc_queue(dev, qid, cq_size, vector); 1071b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10723f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox if (!nvmeq) 10736f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return ERR_PTR(-ENOMEM); 10743f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox 1075b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_cq(dev, qid, nvmeq); 1076b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1077b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 1078b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1079b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_sq(dev, qid, nvmeq); 1080b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1081b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_cq; 1082b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10833001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme"); 1084b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1085b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_sq; 1086b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1087b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 1088b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1089b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_sq: 1090b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 1091b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_cq: 1092b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 1093b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 1094b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 1095b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 1096b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 1097b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 1098b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 10996f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return ERR_PTR(result); 1100b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1101b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 11028d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_configure_admin_queue(struct nvme_dev *dev) 1103b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 11049e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox int result = 0; 1105b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 aqa; 110622605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox u64 cap; 110722605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox unsigned long timeout; 1108b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq; 1109b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1110b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 1111b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1112b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq = nvme_alloc_queue(dev, 0, 64, 0); 11133f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox if (!nvmeq) 11143f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox return -ENOMEM; 1115b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1116b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa = nvmeq->q_depth - 1; 1117b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa |= aqa << 16; 1118b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1119b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config = NVME_CC_ENABLE | NVME_CC_CSS_NVM; 1120b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= (PAGE_SHIFT - 12) << NVME_CC_MPS_SHIFT; 1121b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; 11227f53f9d2424533256ae86f7df5661a17de743de8Matthew Wilcox dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; 1123b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 11245911f20039ce59d7e7834f0c42151cf759b6f786Shane Michael Matthews writel(0, &dev->bar->cc); 1125b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(aqa, &dev->bar->aqa); 1126b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->sq_dma_addr, &dev->bar->asq); 1127b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->cq_dma_addr, &dev->bar->acq); 1128b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(dev->ctrl_config, &dev->bar->cc); 1129b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 113022605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox cap = readq(&dev->bar->cap); 113122605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; 1132f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->db_stride = NVME_CAP_STRIDE(cap); 113322605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox 11349e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox while (!result && !(readl(&dev->bar->csts) & NVME_CSTS_RDY)) { 1135b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox msleep(100); 1136b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (fatal_signal_pending(current)) 11379e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox result = -EINTR; 113822605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox if (time_after(jiffies, timeout)) { 113922605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox dev_err(&dev->pci_dev->dev, 114022605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox "Device not ready; aborting initialisation\n"); 11419e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox result = -ENODEV; 114222605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox } 1143b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1144b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1145025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch if (result) 1146025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch goto free_q; 11479e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 11483001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme admin"); 1149025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch if (result) 1150025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch goto free_q; 1151025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch 1152b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->queues[0] = nvmeq; 1153b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1154025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch 1155025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch free_q: 1156025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch nvme_free_queue_mem(nvmeq); 1157025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch return result; 1158b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1159b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 11605d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermastruct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write, 1161eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned long addr, unsigned length) 1162b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 116336c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox int i, err, count, nents, offset; 11647fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct scatterlist *sg; 11657fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct page **pages; 1166eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 116736c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 116836c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (addr & 3) 1169eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 11707fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox if (!length) 1171eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 11727fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 117336c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox offset = offset_in_page(addr); 11747fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox count = DIV_ROUND_UP(offset + length, PAGE_SIZE); 11757fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox pages = kcalloc(count, sizeof(*pages), GFP_KERNEL); 117622fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter if (!pages) 117722fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter return ERR_PTR(-ENOMEM); 117836c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 117936c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = get_user_pages_fast(addr, count, 1, pages); 118036c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (err < count) { 118136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox count = err; 118236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = -EFAULT; 118336c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox goto put_pages; 118436c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox } 11857fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 1186eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(count, length, GFP_KERNEL); 1187eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = iod->sg; 118836c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox sg_init_table(sg, count); 1189d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox for (i = 0; i < count; i++) { 1190d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox sg_set_page(&sg[i], pages[i], 1191d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox min_t(int, length, PAGE_SIZE - offset), offset); 1192d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox length -= (PAGE_SIZE - offset); 1193d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox offset = 0; 11947fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox } 1195fe304c43c6d63e29ed4fc46a874d7a74313788c5Matthew Wilcox sg_mark_end(&sg[i - 1]); 11961c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox iod->nents = count; 11977fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 11987fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox err = -ENOMEM; 11997fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox nents = dma_map_sg(&dev->pci_dev->dev, sg, count, 12007fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 120136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (!nents) 1202eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 1203b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12047fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1205eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 1206b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1207eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 1208eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 12097fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_pages: 12107fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox for (i = 0; i < count; i++) 12117fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_page(pages[i]); 12127fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1213eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(err); 12147fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1215b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12165d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid nvme_unmap_user_pages(struct nvme_dev *dev, int write, 12171c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox struct nvme_iod *iod) 12187fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox{ 12191c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox int i; 1220b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12211c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 12221c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 12237fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 12241c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox for (i = 0; i < iod->nents; i++) 12251c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox put_page(sg_page(&iod->sg[i])); 12267fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1227b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1228a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcoxstatic int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) 1229a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox{ 1230a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_dev *dev = ns->dev; 1231a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_queue *nvmeq; 1232a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_user_io io; 1233a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_command c; 1234a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox unsigned length; 1235eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int status; 1236eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 1237a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1238a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox if (copy_from_user(&io, uio, sizeof(io))) 1239a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return -EFAULT; 12406c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox length = (io.nblocks + 1) << ns->lba_shift; 12416c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 12426c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox switch (io.opcode) { 12436c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_write: 12446c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_read: 12456bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case nvme_cmd_compare: 1246eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_map_user_pages(dev, io.opcode & 1, io.addr, length); 12476413214c5d424fd5aae6567848340f962ad2ce0fMatthew Wilcox break; 12486c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox default: 12496bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EINVAL; 12506c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox } 12516c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 1252eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1253eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1254a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1255a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox memset(&c, 0, sizeof(c)); 1256a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.opcode = io.opcode; 1257a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.flags = io.flags; 12586c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.nsid = cpu_to_le32(ns->ns_id); 1259a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.slba = cpu_to_le64(io.slba); 12606c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.length = cpu_to_le16(io.nblocks); 1261a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.control = cpu_to_le16(io.control); 12621c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); 12631c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.reftag = cpu_to_le32(io.reftag); 12641c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.apptag = cpu_to_le16(io.apptag); 12651c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.appmask = cpu_to_le16(io.appmask); 1266a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox /* XXX: metadata */ 1267eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, GFP_KERNEL); 1268a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1269040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox nvmeq = get_nvmeq(dev); 1270fa92282149842645931580225647238428374758Matthew Wilcox /* 1271fa92282149842645931580225647238428374758Matthew Wilcox * Since nvme_submit_sync_cmd sleeps, we can't keep preemption 1272b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * disabled. We may be preempted at any point, and be rescheduled 1273b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * to a different CPU. That will cause cacheline bouncing, but no 1274b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * additional races since q_lock already protects against other CPUs. 1275b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox */ 1276a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox put_nvmeq(nvmeq); 1277b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (length != (io.nblocks + 1) << ns->lba_shift) 1278b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1279b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 1280ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox status = nvme_submit_sync_cmd(nvmeq, &c, NULL, NVME_IO_TIMEOUT); 1281a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 12821c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, io.opcode & 1, iod); 1283eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 1284a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return status; 1285a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox} 1286a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 128750af8baec46a99a9b81a4600c0374f83a5a590a9Keith Buschstatic int nvme_user_admin_cmd(struct nvme_dev *dev, 12886bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd __user *ucmd) 12896ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox{ 12906bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd cmd; 12916ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox struct nvme_command c; 1292eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int status, length; 1293c7d36ab8fa04c213328119a9c0d66985fe204ee5Keith Busch struct nvme_iod *uninitialized_var(iod); 12946ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 12956bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (!capable(CAP_SYS_ADMIN)) 12966bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EACCES; 12976bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (copy_from_user(&cmd, ucmd, sizeof(cmd))) 12986ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return -EFAULT; 12996ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 13006ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox memset(&c, 0, sizeof(c)); 13016bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.opcode = cmd.opcode; 13026bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.flags = cmd.flags; 13036bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.nsid = cpu_to_le32(cmd.nsid); 13046bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); 13056bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); 13066bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); 13076bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); 13086bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); 13096bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); 13106bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); 13116bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); 13126bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 13136bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox length = cmd.data_len; 13146bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 1315497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox iod = nvme_map_user_pages(dev, cmd.opcode & 1, cmd.addr, 1316497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox length); 1317eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1318eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1319eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, 1320eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_KERNEL); 13216bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 13226bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 13236bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (length != cmd.data_len) 1324b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1325b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 1326f4f117f64baf8840d22266d518227b2a186d294bKeith Busch status = nvme_submit_admin_cmd(dev, &c, &cmd.result); 1327eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 13286bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 13291c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, cmd.opcode & 1, iod); 1330eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 13316bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 1332f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 1333f4f117f64baf8840d22266d518227b2a186d294bKeith Busch if (!status && copy_to_user(&ucmd->result, &cmd.result, 1334f4f117f64baf8840d22266d518227b2a186d294bKeith Busch sizeof(cmd.result))) 1335f4f117f64baf8840d22266d518227b2a186d294bKeith Busch status = -EFAULT; 1336f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 13376ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return status; 13386ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox} 13396ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 1340b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, 1341b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long arg) 1342b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1343b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = bdev->bd_disk->private_data; 1344b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1345b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox switch (cmd) { 13466bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ID: 13476bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return ns->ns_id; 13486bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ADMIN_CMD: 134950af8baec46a99a9b81a4600c0374f83a5a590a9Keith Busch return nvme_user_admin_cmd(ns->dev, (void __user *)arg); 1350a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox case NVME_IOCTL_SUBMIT_IO: 1351a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return nvme_submit_io(ns, (void __user *)arg); 13525d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma case SG_GET_VERSION_NUM: 13535d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma return nvme_sg_get_version_num((void __user *)arg); 13545d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma case SG_IO: 13555d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma return nvme_sg_io(ns, (void __user *)arg); 1356b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox default: 1357b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOTTY; 1358b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1359b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1360b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1361b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic const struct block_device_operations nvme_fops = { 1362b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .owner = THIS_MODULE, 1363b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .ioctl = nvme_ioctl, 13644948168280b269a514045766ddd872cfac5968e1Matthew Wilcox .compat_ioctl = nvme_ioctl, 1365b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1366b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 13671fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic void nvme_resubmit_bios(struct nvme_queue *nvmeq) 13681fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 13691fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (bio_list_peek(&nvmeq->sq_cong)) { 13701fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 13711fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_ns *ns = bio->bi_bdev->bd_disk->private_data; 1372427e97080196548557b288517537ab7eb48c309fKeith Busch 1373427e97080196548557b288517537ab7eb48c309fKeith Busch if (bio_list_empty(&nvmeq->sq_cong)) 1374427e97080196548557b288517537ab7eb48c309fKeith Busch remove_wait_queue(&nvmeq->sq_full, 1375427e97080196548557b288517537ab7eb48c309fKeith Busch &nvmeq->sq_cong_wait); 13761fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_submit_bio_queue(nvmeq, ns, bio)) { 1377427e97080196548557b288517537ab7eb48c309fKeith Busch if (bio_list_empty(&nvmeq->sq_cong)) 1378427e97080196548557b288517537ab7eb48c309fKeith Busch add_wait_queue(&nvmeq->sq_full, 1379427e97080196548557b288517537ab7eb48c309fKeith Busch &nvmeq->sq_cong_wait); 13801fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox bio_list_add_head(&nvmeq->sq_cong, bio); 13811fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox break; 13821fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 13831fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 13841fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 13851fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 13861fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic int nvme_kthread(void *data) 13871fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 13881fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_dev *dev; 13891fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 13901fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (!kthread_should_stop()) { 1391564a232c059913d91b491e04c2b2d670b8f94615Arjan van de Ven set_current_state(TASK_INTERRUPTIBLE); 13921fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 13931fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_for_each_entry(dev, &dev_list, node) { 13941fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox int i; 13951fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox for (i = 0; i < dev->queue_count; i++) { 13961fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_queue *nvmeq = dev->queues[i]; 1397740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (!nvmeq) 1398740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox continue; 13991fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 14001fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_process_cq(nvmeq)) 14011fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox printk("process_cq did something\n"); 1402a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_cancel_ios(nvmeq, true); 14031fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_resubmit_bios(nvmeq); 14041fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 14051fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 14061fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 14071fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 1408acb7aa0db09b8abd38abeb84334a8a27a52fbb1bArjan van de Ven schedule_timeout(round_jiffies_relative(HZ)); 14091fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 14101fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 14111fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 14121fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 14135aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic DEFINE_IDA(nvme_index_ida); 14145aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 14155aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic int nvme_get_ns_idx(void) 14165aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox{ 14175aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox int index, error; 14185aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 14195aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox do { 14205aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox if (!ida_pre_get(&nvme_index_ida, GFP_KERNEL)) 14215aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox return -1; 14225aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 14235aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_lock(&dev_list_lock); 14245aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox error = ida_get_new(&nvme_index_ida, &index); 14255aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_unlock(&dev_list_lock); 14265aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox } while (error == -EAGAIN); 14275aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 14285aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox if (error) 14295aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox index = -1; 14305aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox return index; 14315aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox} 14325aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 14335aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic void nvme_put_ns_idx(int index) 14345aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox{ 14355aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_lock(&dev_list_lock); 14365aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ida_remove(&nvme_index_ida, index); 14375aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_unlock(&dev_list_lock); 14385aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox} 14395aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 14400e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic void nvme_config_discard(struct nvme_ns *ns) 14410e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 14420e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch u32 logical_block_size = queue_logical_block_size(ns->queue); 14430e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_zeroes_data = 0; 14440e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_alignment = logical_block_size; 14450e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_granularity = logical_block_size; 14460e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.max_discard_sectors = 0xffffffff; 14470e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); 14480e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 14490e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 14505aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, int nsid, 1451b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_id_ns *id, struct nvme_lba_range_type *rt) 1452b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1453b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns; 1454b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct gendisk *disk; 1455b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int lbaf; 1456b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1457b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (rt->attributes & NVME_LBART_ATTRIB_HIDE) 1458b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1459b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1460b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns = kzalloc(sizeof(*ns), GFP_KERNEL); 1461b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns) 1462b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1463b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue = blk_alloc_queue(GFP_KERNEL); 1464b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns->queue) 1465b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_ns; 14664eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox ns->queue->queue_flags = QUEUE_FLAG_DEFAULT; 14674eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue); 14684eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); 1469b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_queue_make_request(ns->queue, nvme_make_request); 1470b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->dev = dev; 1471b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue->queuedata = ns; 1472b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1473b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk = alloc_disk(NVME_MINORS); 1474b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!disk) 1475b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_queue; 14765aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ns->ns_id = nsid; 1477b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->disk = disk; 1478b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox lbaf = id->flbas & 0xf; 1479b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->lba_shift = id->lbaf[lbaf].ds; 1480e9ef46369f5107e634a93b7fc4e62a1f53343197Keith Busch blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); 14818fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch if (dev->max_hw_sectors) 14828fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors); 1483b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1484b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->major = nvme_major; 1485b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->minors = NVME_MINORS; 14865aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox disk->first_minor = NVME_MINORS * nvme_get_ns_idx(); 1487b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->fops = &nvme_fops; 1488b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->private_data = ns; 1489b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->queue = ns->queue; 1490388f037f4e7f0a24bac6b1a24f144f5d939f58cfMatthew Wilcox disk->driverfs_dev = &dev->pci_dev->dev; 14915aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox sprintf(disk->disk_name, "nvme%dn%d", dev->instance, nsid); 1492b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); 1493b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14940e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (dev->oncs & NVME_CTRL_ONCS_DSM) 14950e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvme_config_discard(ns); 14960e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 1497b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return ns; 1498b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1499b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_queue: 1500b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1501b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_ns: 1502b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1503b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1504b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1505b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1506b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_ns_free(struct nvme_ns *ns) 1507b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 15085aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox int index = ns->disk->first_minor / NVME_MINORS; 1509b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox put_disk(ns->disk); 15105aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox nvme_put_ns_idx(index); 1511b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1512b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1513b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1514b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1515b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcoxstatic int set_queue_count(struct nvme_dev *dev, int count) 1516b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1517b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 1518b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 result; 1519b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcox u32 q_count = (count - 1) | ((count - 1) << 16); 1520b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1521df3481399042200792822b6243e36a95a557b57eMatthew Wilcox status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0, 1522bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox &result); 1523b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 1524b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 1525b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return min(result & 0xffff, result >> 16) + 1; 1526b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1527b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 15288d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_setup_io_queues(struct nvme_dev *dev) 1529b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1530a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch int result, cpu, i, nr_io_queues, db_bar_size, q_depth; 1531b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1532b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = num_online_cpus(); 1533b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox result = set_queue_count(dev, nr_io_queues); 15341b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox if (result < 0) 15351b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox return result; 1536b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox if (result < nr_io_queues) 1537b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = result; 1538b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 15391b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox /* Deregister the admin queue's interrupt */ 15401b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox free_irq(dev->entry[0].vector, dev->queues[0]); 15411b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1542f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox db_bar_size = 4096 + ((nr_io_queues + 1) << (dev->db_stride + 3)); 1543f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox if (db_bar_size > 8192) { 1544f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox iounmap(dev->bar); 1545f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->bar = ioremap(pci_resource_start(dev->pci_dev, 0), 1546f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox db_bar_size); 1547f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 1548f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->queues[0]->q_db = dev->dbs; 1549f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox } 1550f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox 1551b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) 15521b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->entry[i].entry = i; 15531b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox for (;;) { 1554b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox result = pci_enable_msix(dev->pci_dev, dev->entry, 1555b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues); 15561b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox if (result == 0) { 15571b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox break; 15581b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } else if (result > 0) { 1559b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = result; 15601b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox continue; 15611b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } else { 1562b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = 1; 15631b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox break; 15641b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 15651b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 15661b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 15671b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox result = queue_request_irq(dev, dev->queues[0], "nvme admin"); 15681b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox /* XXX: handle failure here */ 15691b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 15701b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_first(cpu_online_mask); 1571b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) { 15721b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox irq_set_affinity_hint(dev->entry[i].vector, get_cpu_mask(cpu)); 15731b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_next(cpu, cpu_online_mask); 15741b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 15751b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1576a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch q_depth = min_t(int, NVME_CAP_MQES(readq(&dev->bar->cap)) + 1, 1577a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch NVME_Q_DEPTH); 1578b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) { 1579a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch dev->queues[i + 1] = nvme_create_queue(dev, i + 1, q_depth, i); 15806f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox if (IS_ERR(dev->queues[i + 1])) 15816f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return PTR_ERR(dev->queues[i + 1]); 15821b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queue_count++; 15831b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 1584b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 15859ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox for (; i < num_possible_cpus(); i++) { 15869ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox int target = i % rounddown_pow_of_two(dev->queue_count - 1); 15879ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox dev->queues[i + 1] = dev->queues[target + 1]; 15889ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox } 15899ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox 1590b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1591b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1592b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1593b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_free_queues(struct nvme_dev *dev) 1594b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1595b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int i; 1596b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1597b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (i = dev->queue_count - 1; i >= 0; i--) 1598b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queue(dev, i); 1599b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1600b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1601422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox/* 1602422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * Return: error value if an error occurred setting up the queues or calling 1603422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * Identify Device. 0 if these succeeded, even if adding some of the 1604422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * namespaces failed. At the moment, these failures are silent. TBD which 1605422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * failures should be reported. 1606422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox */ 16078d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_dev_add(struct nvme_dev *dev) 1608b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1609b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int res, nn, i; 1610cbb6218fd4ae8f98ddf0d66f0826a7a3a9c88298Keith Busch struct nvme_ns *ns; 161151814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox struct nvme_id_ctrl *ctrl; 1612bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_id_ns *id_ns; 1613bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox void *mem; 1614b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t dma_addr; 1615b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1616b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = nvme_setup_io_queues(dev); 1617b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1618b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 1619b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1620bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox mem = dma_alloc_coherent(&dev->pci_dev->dev, 8192, &dma_addr, 1621b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 1622a9ef4343afbe67a6abf83c0f0294e80db48e513aKeith Busch if (!mem) 1623a9ef4343afbe67a6abf83c0f0294e80db48e513aKeith Busch return -ENOMEM; 1624b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1625bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, 0, 1, dma_addr); 1626b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) { 1627b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = -EIO; 1628cbb6218fd4ae8f98ddf0d66f0826a7a3a9c88298Keith Busch goto out; 1629b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1630b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1631bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ctrl = mem; 163251814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox nn = le32_to_cpup(&ctrl->nn); 16330e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch dev->oncs = le16_to_cpup(&ctrl->oncs); 163451814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn)); 163551814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn)); 163651814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr)); 16378fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch if (ctrl->mdts) { 16388fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12; 16398fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch dev->max_hw_sectors = 1 << (ctrl->mdts + shift - 9); 16408fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch } 1641b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1642bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox id_ns = mem; 16432b2c1896871838cdf549442e8ad0264be5fa74e3Matthew Wilcox for (i = 1; i <= nn; i++) { 1644bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, i, 0, dma_addr); 1645b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1646b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1647b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1648bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox if (id_ns->ncap == 0) 1649b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1650b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1651bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_get_features(dev, NVME_FEAT_LBA_RANGE, i, 165208df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr + 4096, NULL); 1653b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1654122090366d1d5c6ec1bfb6dfdb3a6d121ff074aaKeith Busch memset(mem + 4096, 0, 4096); 1655b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1656bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ns = nvme_alloc_ns(dev, i, mem, mem + 4096); 1657b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (ns) 1658b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_add_tail(&ns->list, &dev->namespaces); 1659b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1660b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry(ns, &dev->namespaces, list) 1661b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox add_disk(ns->disk); 1662422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox res = 0; 1663b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1664bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox out: 1665684f5c2025b067a23722e620d0b3b858d8dc5d01Matthew Wilcox dma_free_coherent(&dev->pci_dev->dev, 8192, mem, dma_addr); 1666b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 1667b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1668b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1669b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_dev_remove(struct nvme_dev *dev) 1670b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1671b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns, *next; 1672b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 16731fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 16741fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_del(&dev->node); 16751fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 16761fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 1677b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 1678b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_del(&ns->list); 1679b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox del_gendisk(ns->disk); 1680b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_ns_free(ns); 1681b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1682b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1683b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queues(dev); 1684b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1685b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1686b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1687b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1688091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic int nvme_setup_prp_pools(struct nvme_dev *dev) 1689091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 1690091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 1691091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dev->prp_page_pool = dma_pool_create("prp list page", dmadev, 1692091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox PAGE_SIZE, PAGE_SIZE, 0); 1693091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (!dev->prp_page_pool) 1694091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return -ENOMEM; 1695091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 169699802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox /* Optimisation for I/Os between 4k and 128k */ 169799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dev->prp_small_pool = dma_pool_create("prp list 256", dmadev, 169899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 256, 256, 0); 169999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (!dev->prp_small_pool) { 170099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 170199802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox return -ENOMEM; 170299802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 1703091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return 0; 1704091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 1705091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1706091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic void nvme_release_prp_pools(struct nvme_dev *dev) 1707091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 1708091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 170999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_small_pool); 1710091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 1711091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1712cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic DEFINE_IDA(nvme_instance_ida); 1713cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1714cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic int nvme_set_instance(struct nvme_dev *dev) 1715b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1716cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh int instance, error; 1717cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1718cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh do { 1719cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (!ida_pre_get(&nvme_instance_ida, GFP_KERNEL)) 1720cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 1721cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1722cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 1723cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh error = ida_get_new(&nvme_instance_ida, &instance); 1724cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 1725cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh } while (error == -EAGAIN); 1726cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1727cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (error) 1728cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 1729cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1730cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh dev->instance = instance; 1731cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return 0; 1732b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1733b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1734b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_release_instance(struct nvme_dev *dev) 1735b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1736cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 1737cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh ida_remove(&nvme_instance_ida, dev->instance); 1738cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 1739b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1740b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 17415e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic void nvme_free_dev(struct kref *kref) 17425e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 17435e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = container_of(kref, struct nvme_dev, kref); 17445e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_dev_remove(dev); 17455e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch pci_disable_msix(dev->pci_dev); 17465e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch iounmap(dev->bar); 17475e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_release_instance(dev); 17485e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_release_prp_pools(dev); 17495e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch pci_disable_device(dev->pci_dev); 17505e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch pci_release_regions(dev->pci_dev); 17515e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev->queues); 17525e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev->entry); 17535e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev); 17545e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 17555e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 17565e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic int nvme_dev_open(struct inode *inode, struct file *f) 17575e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 17585e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = container_of(f->private_data, struct nvme_dev, 17595e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch miscdev); 17605e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_get(&dev->kref); 17615e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch f->private_data = dev; 17625e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return 0; 17635e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 17645e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 17655e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic int nvme_dev_release(struct inode *inode, struct file *f) 17665e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 17675e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = f->private_data; 17685e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_put(&dev->kref, nvme_free_dev); 17695e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return 0; 17705e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 17715e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 17725e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic long nvme_dev_ioctl(struct file *f, unsigned int cmd, unsigned long arg) 17735e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 17745e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = f->private_data; 17755e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch switch (cmd) { 17765e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch case NVME_IOCTL_ADMIN_CMD: 17775e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return nvme_user_admin_cmd(dev, (void __user *)arg); 17785e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch default: 17795e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return -ENOTTY; 17805e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch } 17815e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 17825e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 17835e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic const struct file_operations nvme_dev_fops = { 17845e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .owner = THIS_MODULE, 17855e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .open = nvme_dev_open, 17865e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .release = nvme_dev_release, 17875e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .unlocked_ioctl = nvme_dev_ioctl, 17885e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .compat_ioctl = nvme_dev_ioctl, 17895e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch}; 17905e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 17918d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) 1792b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1793574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox int bars, result = -ENOMEM; 1794b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev; 1795b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1796b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev = kzalloc(sizeof(*dev), GFP_KERNEL); 1797b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev) 1798b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOMEM; 1799b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->entry = kcalloc(num_possible_cpus(), sizeof(*dev->entry), 1800b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 1801b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->entry) 1802b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 18031b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queues = kcalloc(num_possible_cpus() + 1, sizeof(void *), 18041b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox GFP_KERNEL); 1805b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->queues) 1806b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 1807b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 18080ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews if (pci_enable_device_mem(pdev)) 18090ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews goto free; 1810f64d3365a3e5cb46e69db7e2c82a7cb9a5bed1b8Matthew Wilcox pci_set_master(pdev); 1811574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox bars = pci_select_bars(pdev, IORESOURCE_MEM); 1812574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox if (pci_request_selected_regions(pdev, bars, "nvme")) 1813574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox goto disable; 18140ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews 1815b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox INIT_LIST_HEAD(&dev->namespaces); 1816b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->pci_dev = pdev; 1817b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_set_drvdata(pdev, dev); 18182930353f9f2b9e4629e935acd970cb73c1171229Matthew Wilcox dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); 18192930353f9f2b9e4629e935acd970cb73c1171229Matthew Wilcox dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); 1820cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh result = nvme_set_instance(dev); 1821cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (result) 1822cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh goto disable; 1823cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 182453c9577e9ca68a633c6e9df2b54eaecacfa77f62Matthew Wilcox dev->entry[0].vector = pdev->irq; 1825b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1826091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox result = nvme_setup_prp_pools(dev); 1827091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (result) 1828091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox goto disable_msix; 1829091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1830b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); 1831b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->bar) { 1832b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = -ENOMEM; 1833574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox goto disable_msix; 1834b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1835b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1836b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = nvme_configure_admin_queue(dev); 1837b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 1838b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto unmap; 1839b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->queue_count++; 1840b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 18411fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 18421fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_add(&dev->node, &dev_list); 18431fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 18441fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 1845740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox result = nvme_dev_add(dev); 1846740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (result) 1847740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox goto delete; 1848740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 18495e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch scnprintf(dev->name, sizeof(dev->name), "nvme%d", dev->instance); 18505e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.minor = MISC_DYNAMIC_MINOR; 18515e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.parent = &pdev->dev; 18525e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.name = dev->name; 18535e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.fops = &nvme_dev_fops; 18545e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch result = misc_register(&dev->miscdev); 18555e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch if (result) 18565e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch goto remove; 18575e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 18585e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_init(&dev->kref); 1859b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1860b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 18615e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch remove: 18625e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_dev_remove(dev); 1863b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox delete: 1864740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox spin_lock(&dev_list_lock); 1865740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox list_del(&dev->node); 1866740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox spin_unlock(&dev_list_lock); 1867740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 1868b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queues(dev); 1869b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unmap: 1870b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox iounmap(dev->bar); 1871574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox disable_msix: 1872b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_disable_msix(pdev); 1873b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_release_instance(dev); 1874091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvme_release_prp_pools(dev); 1875574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox disable: 18760ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews pci_disable_device(pdev); 1877574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox pci_release_regions(pdev); 1878b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free: 1879b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->queues); 1880b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->entry); 1881b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev); 1882b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1883b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1884b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 18858d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic void nvme_remove(struct pci_dev *pdev) 1886b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1887b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev = pci_get_drvdata(pdev); 18885e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch misc_deregister(&dev->miscdev); 18895e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_put(&dev->kref, nvme_free_dev); 1890b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1891b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1892b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* These functions are yet to be implemented */ 1893b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_detected NULL 1894b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_dump_registers NULL 1895b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_link_reset NULL 1896b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_slot_reset NULL 1897b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_resume NULL 1898b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_suspend NULL 1899b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_resume NULL 1900b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 19011d3520357df99baf4ad89f86268ac96cd38092d9Stephen Hemmingerstatic const struct pci_error_handlers nvme_err_handler = { 1902b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .error_detected = nvme_error_detected, 1903b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .mmio_enabled = nvme_dump_registers, 1904b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .link_reset = nvme_link_reset, 1905b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .slot_reset = nvme_slot_reset, 1906b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_error_resume, 1907b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1908b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1909b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* Move to pci_ids.h later */ 1910b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define PCI_CLASS_STORAGE_EXPRESS 0x010802 1911b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1912b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic DEFINE_PCI_DEVICE_TABLE(nvme_id_table) = { 1913b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, 1914b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { 0, } 1915b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1916b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_DEVICE_TABLE(pci, nvme_id_table); 1917b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1918b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct pci_driver nvme_driver = { 1919b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .name = "nvme", 1920b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .id_table = nvme_id_table, 1921b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .probe = nvme_probe, 19228d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartman .remove = nvme_remove, 1923b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .suspend = nvme_suspend, 1924b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_resume, 1925b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .err_handler = &nvme_err_handler, 1926b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1927b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1928b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __init nvme_init(void) 1929b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 19300ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox int result; 19311fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 19321fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); 19331fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (IS_ERR(nvme_thread)) 19341fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return PTR_ERR(nvme_thread); 1935b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 19365c42ea1643a630060f9e71e06d3933d244970967Keith Busch result = register_blkdev(nvme_major, "nvme"); 19375c42ea1643a630060f9e71e06d3933d244970967Keith Busch if (result < 0) 19381fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto kill_kthread; 19395c42ea1643a630060f9e71e06d3933d244970967Keith Busch else if (result > 0) 19400ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox nvme_major = result; 1941b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1942b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = pci_register_driver(&nvme_driver); 19431fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (result) 19441fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto unregister_blkdev; 19451fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 1946b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 19471fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox unregister_blkdev: 1948b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 19491fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kill_kthread: 19501fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 1951b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1952b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1953b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1954b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void __exit nvme_exit(void) 1955b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1956b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_unregister_driver(&nvme_driver); 1957b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 19581fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 1959b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1960b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1961b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); 1962b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_LICENSE("GPL"); 1963366e8217e5ec6ce9f73aec19c46d983110fb4a98Matthew WilcoxMODULE_VERSION("0.8"); 1964b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_init(nvme_init); 1965b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_exit(nvme_exit); 1966