nvme-core.c revision 7d8224574cbd2326a6be00f319f5f7597abec3f6
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; 82e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox u8 cq_phase; 83e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox u8 cqe_seen; 84b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long cmdid_data[]; 85b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 86b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 87b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 88b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Check we didin't inadvertently grow the command struct 89b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 90b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic inline void _nvme_check_size(void) 91b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 92b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); 93b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); 94b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); 95b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); 96b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_features) != 64); 97f8ebf8409abfdaeeb8c847381629a2a8b8e3d816Vishal Verma BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); 98b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_command) != 64); 99b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096); 100b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096); 101b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); 1026ecec74520d8a357726e6c12f99080dbe7b347ddKeith Busch BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); 103b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 104b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1055c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxtypedef void (*nvme_completion_fn)(struct nvme_dev *, void *, 106c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *); 107c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 108e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstruct nvme_cmd_info { 109c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 110c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 111e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox unsigned long timeout; 112e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox}; 113e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 114e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstatic struct nvme_cmd_info *nvme_cmd_info(struct nvme_queue *nvmeq) 115e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox{ 116e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return (void *)&nvmeq->cmdid_data[BITS_TO_LONGS(nvmeq->q_depth)]; 117e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox} 118e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 119b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 120714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * alloc_cmdid() - Allocate a Command ID 121714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @nvmeq: The queue that will be used for this command 122714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @ctx: A pointer that will be passed to the handler 123c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox * @handler: The function to call on completion 124b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 125b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Allocate a Command ID for a queue. The data passed in will 126b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * be passed to the completion handler. This is implemented by using 127b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the bottom two bits of the ctx pointer to store the handler ID. 128b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Passing in a pointer that's not 4-byte aligned will cause a BUG. 129b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * We can change this if it becomes a problem. 130184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * 131184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * May be called with local interrupts disabled and the q_lock held, 132184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * or with interrupts enabled and no locks held. 133b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 134c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic int alloc_cmdid(struct nvme_queue *nvmeq, void *ctx, 135c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 136b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 137e6d15f79f997a98b3a69abbc462fc9041cc1a7b4Matthew Wilcox int depth = nvmeq->q_depth - 1; 138e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 139b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 140b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 141b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox do { 142b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdid = find_first_zero_bit(nvmeq->cmdid_data, depth); 143b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid >= depth) 144b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EBUSY; 145b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } while (test_and_set_bit(cmdid, nvmeq->cmdid_data)); 146b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 147c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = handler; 148c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].ctx = ctx; 149e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].timeout = jiffies + timeout; 150b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 151b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 152b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 153b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int alloc_cmdid_killable(struct nvme_queue *nvmeq, void *ctx, 154c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 155b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 156b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 157b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wait_event_killable(nvmeq->sq_full, 158e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox (cmdid = alloc_cmdid(nvmeq, ctx, handler, timeout)) >= 0); 159b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return (cmdid < 0) ? -EINTR : cmdid; 160b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 161b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 162c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox/* Special values must be less than 0x1000 */ 163c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox#define CMD_CTX_BASE ((void *)POISON_POINTER_DELTA) 164d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_CANCELLED (0x30C + CMD_CTX_BASE) 165d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_COMPLETED (0x310 + CMD_CTX_BASE) 166d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_INVALID (0x314 + CMD_CTX_BASE) 16700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox#define CMD_CTX_FLUSH (0x318 + CMD_CTX_BASE) 168be7b62754e097adc0cb16c25c9ee86ee20de62fbMatthew Wilcox 1695c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void special_completion(struct nvme_dev *dev, void *ctx, 170c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 171c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 172c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_CANCELLED) 173c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 174c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_FLUSH) 175c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 176c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_COMPLETED) { 1775c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, 178c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "completed id %d twice on queue %d\n", 179c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 180c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 181c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 182c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_INVALID) { 1835c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, 184c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "invalid id %d completed on queue %d\n", 185c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 186c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 187c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 188c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 1895c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, "Unknown special completion %p\n", ctx); 190c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 191c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 192184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 193184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 194184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 195c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *free_cmdid(struct nvme_queue *nvmeq, int cmdid, 196c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 197b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 198c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 199e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 200b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 201c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (cmdid >= nvmeq->q_depth) { 202c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = special_completion; 20348e3d39816416b3bf03dee3a796c0c04427c1a31Matthew Wilcox return CMD_CTX_INVALID; 204c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 205859361a228258edf4821d9f5635825033eca78e8Keith Busch if (fn) 206859361a228258edf4821d9f5635825033eca78e8Keith Busch *fn = info[cmdid].fn; 207c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 208c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 209e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_COMPLETED; 210b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox clear_bit(cmdid, nvmeq->cmdid_data); 211b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wake_up(&nvmeq->sq_full); 212c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 213b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 214b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 215c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *cancel_cmdid(struct nvme_queue *nvmeq, int cmdid, 216c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 2173c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 218c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 219e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 220c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (fn) 221c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = info[cmdid].fn; 222c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 223c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 224e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_CANCELLED; 225c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 2263c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 2273c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 2285d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermastruct nvme_queue *get_nvmeq(struct nvme_dev *dev) 229b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 230040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox return dev->queues[get_cpu() + 1]; 231b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 232b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2335d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid put_nvmeq(struct nvme_queue *nvmeq) 234b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2351b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox put_cpu(); 236b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 237b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 238b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 239714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * nvme_submit_cmd() - Copy a command into a queue and ring the doorbell 240b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @nvmeq: The queue to use 241b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @cmd: The command to send 242b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 243b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Safe to use from interrupt context 244b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 245b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd) 246b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 247b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long flags; 248b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 tail; 249b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_irqsave(&nvmeq->q_lock, flags); 250b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = nvmeq->sq_tail; 251b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); 252b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++tail == nvmeq->q_depth) 253b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = 0; 2547547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(tail, nvmeq->q_db); 255b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = tail; 256b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_unlock_irqrestore(&nvmeq->q_lock, flags); 257b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 258b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 259b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 260b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 261eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic __le64 **iod_list(struct nvme_iod *iod) 262e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews{ 263eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ((void *)iod) + iod->offset; 264e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews} 265e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 266eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox/* 267eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * Will slightly overestimate the number of pages needed. This is OK 268eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * as it only leads to a small amount of wasted memory for the lifetime of 269eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * the I/O. 270eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox */ 271eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic int nvme_npages(unsigned size) 272eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox{ 273eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned nprps = DIV_ROUND_UP(size + PAGE_SIZE, PAGE_SIZE); 274eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); 275eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox} 276b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 277eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic struct nvme_iod * 278eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxnvme_alloc_iod(unsigned nseg, unsigned nbytes, gfp_t gfp) 279b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 280eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = kmalloc(sizeof(struct nvme_iod) + 281eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(__le64 *) * nvme_npages(nbytes) + 282eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(struct scatterlist) * nseg, gfp); 283eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 284eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod) { 285eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->offset = offsetof(struct nvme_iod, sg[nseg]); 286eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 287eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->length = nbytes; 2882b1960341576bf51c01b12fefeb1cc53820923e7Keith Busch iod->nents = 0; 2896198221fa0df0298513b35796f63f242ea97134eKeith Busch iod->start_time = jiffies; 290eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 291eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 292eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 293b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 294b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2955d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod) 296b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 297eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox const int last_prp = PAGE_SIZE / 8 - 1; 298eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int i; 299eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 300eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t prp_dma = iod->first_dma; 301eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 302eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod->npages == 0) 303eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_small_pool, list[0], prp_dma); 304eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox for (i = 0; i < iod->npages; i++) { 305eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 *prp_list = list[i]; 306eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t next_prp_dma = le64_to_cpu(prp_list[last_prp]); 307eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); 308eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox prp_dma = next_prp_dma; 309eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 310eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 311b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 312b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3136198221fa0df0298513b35796f63f242ea97134eKeith Buschstatic void nvme_start_io_acct(struct bio *bio) 3146198221fa0df0298513b35796f63f242ea97134eKeith Busch{ 3156198221fa0df0298513b35796f63f242ea97134eKeith Busch struct gendisk *disk = bio->bi_bdev->bd_disk; 3166198221fa0df0298513b35796f63f242ea97134eKeith Busch const int rw = bio_data_dir(bio); 3176198221fa0df0298513b35796f63f242ea97134eKeith Busch int cpu = part_stat_lock(); 3186198221fa0df0298513b35796f63f242ea97134eKeith Busch part_round_stats(cpu, &disk->part0); 3196198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_inc(cpu, &disk->part0, ios[rw]); 3206198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_add(cpu, &disk->part0, sectors[rw], bio_sectors(bio)); 3216198221fa0df0298513b35796f63f242ea97134eKeith Busch part_inc_in_flight(&disk->part0, rw); 3226198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_unlock(); 3236198221fa0df0298513b35796f63f242ea97134eKeith Busch} 3246198221fa0df0298513b35796f63f242ea97134eKeith Busch 3256198221fa0df0298513b35796f63f242ea97134eKeith Buschstatic void nvme_end_io_acct(struct bio *bio, unsigned long start_time) 3266198221fa0df0298513b35796f63f242ea97134eKeith Busch{ 3276198221fa0df0298513b35796f63f242ea97134eKeith Busch struct gendisk *disk = bio->bi_bdev->bd_disk; 3286198221fa0df0298513b35796f63f242ea97134eKeith Busch const int rw = bio_data_dir(bio); 3296198221fa0df0298513b35796f63f242ea97134eKeith Busch unsigned long duration = jiffies - start_time; 3306198221fa0df0298513b35796f63f242ea97134eKeith Busch int cpu = part_stat_lock(); 3316198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_add(cpu, &disk->part0, ticks[rw], duration); 3326198221fa0df0298513b35796f63f242ea97134eKeith Busch part_round_stats(cpu, &disk->part0); 3336198221fa0df0298513b35796f63f242ea97134eKeith Busch part_dec_in_flight(&disk->part0, rw); 3346198221fa0df0298513b35796f63f242ea97134eKeith Busch part_stat_unlock(); 3356198221fa0df0298513b35796f63f242ea97134eKeith Busch} 3366198221fa0df0298513b35796f63f242ea97134eKeith Busch 3375c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void bio_completion(struct nvme_dev *dev, void *ctx, 338b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion *cqe) 339b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 340eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = ctx; 341eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct bio *bio = iod->private; 342b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 status = le16_to_cpup(&cqe->status) >> 1; 343b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3442b1960341576bf51c01b12fefeb1cc53820923e7Keith Busch if (iod->nents) 3452b1960341576bf51c01b12fefeb1cc53820923e7Keith Busch dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 346b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_data_dir(bio) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 3476198221fa0df0298513b35796f63f242ea97134eKeith Busch 3486198221fa0df0298513b35796f63f242ea97134eKeith Busch nvme_end_io_acct(bio, iod->start_time); 349eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 350427e97080196548557b288517537ab7eb48c309fKeith Busch if (status) 3511ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, -EIO); 352427e97080196548557b288517537ab7eb48c309fKeith Busch else 3531ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, 0); 354b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 355b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 356184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* length is in bytes. gfp flags indicates whether we may sleep. */ 3575d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_setup_prps(struct nvme_dev *dev, struct nvme_common_command *cmd, 3585d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma struct nvme_iod *iod, int total_len, gfp_t gfp) 359ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox{ 36099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox struct dma_pool *pool; 361eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int length = total_len; 362eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct scatterlist *sg = iod->sg; 363ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int dma_len = sg_dma_len(sg); 364ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox u64 dma_addr = sg_dma_address(sg); 365ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int offset = offset_in_page(dma_addr); 366e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *prp_list; 367eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 368e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr_t prp_dma; 369eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int nprps, i; 370ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 371ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmd->prp1 = cpu_to_le64(dma_addr); 372ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox length -= (PAGE_SIZE - offset); 373ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= 0) 374eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 375ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 376ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len -= (PAGE_SIZE - offset); 377ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (dma_len) { 378ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr += (PAGE_SIZE - offset); 379ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } else { 380ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox sg = sg_next(sg); 381ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr = sg_dma_address(sg); 382ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len = sg_dma_len(sg); 383ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 384ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 385ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= PAGE_SIZE) { 386ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmd->prp2 = cpu_to_le64(dma_addr); 387eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 388e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 389e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 390e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews nprps = DIV_ROUND_UP(length, PAGE_SIZE); 39199802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (nprps <= (256 / 8)) { 39299802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_small_pool; 393eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 0; 39499802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } else { 39599802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_page_pool; 396eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 1; 39799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 39899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 399b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 400b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (!prp_list) { 401b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox cmd->prp2 = cpu_to_le64(dma_addr); 402eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 403eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return (total_len - length) + PAGE_SIZE; 404b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox } 405eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[0] = prp_list; 406eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->first_dma = prp_dma; 407e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews cmd->prp2 = cpu_to_le64(prp_dma); 408e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews i = 0; 409e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews for (;;) { 4107523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox if (i == PAGE_SIZE / 8) { 411e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *old_prp_list = prp_list; 412b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 413eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!prp_list) 414eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len - length; 415eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[iod->npages++] = prp_list; 4167523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox prp_list[0] = old_prp_list[i - 1]; 4177523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox old_prp_list[i - 1] = cpu_to_le64(prp_dma); 4187523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox i = 1; 419e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 420e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews prp_list[i++] = cpu_to_le64(dma_addr); 421e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len -= PAGE_SIZE; 422e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr += PAGE_SIZE; 423e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews length -= PAGE_SIZE; 424e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (length <= 0) 425e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews break; 426e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (dma_len > 0) 427e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews continue; 428e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews BUG_ON(dma_len < 0); 429e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews sg = sg_next(sg); 430e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr = sg_dma_address(sg); 431e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len = sg_dma_len(sg); 432ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 433ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 434eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 435ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox} 436ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 437427e97080196548557b288517537ab7eb48c309fKeith Buschstruct nvme_bio_pair { 438427e97080196548557b288517537ab7eb48c309fKeith Busch struct bio b1, b2, *parent; 439427e97080196548557b288517537ab7eb48c309fKeith Busch struct bio_vec *bv1, *bv2; 440427e97080196548557b288517537ab7eb48c309fKeith Busch int err; 441427e97080196548557b288517537ab7eb48c309fKeith Busch atomic_t cnt; 442427e97080196548557b288517537ab7eb48c309fKeith Busch}; 443427e97080196548557b288517537ab7eb48c309fKeith Busch 444427e97080196548557b288517537ab7eb48c309fKeith Buschstatic void nvme_bio_pair_endio(struct bio *bio, int err) 445427e97080196548557b288517537ab7eb48c309fKeith Busch{ 446427e97080196548557b288517537ab7eb48c309fKeith Busch struct nvme_bio_pair *bp = bio->bi_private; 447427e97080196548557b288517537ab7eb48c309fKeith Busch 448427e97080196548557b288517537ab7eb48c309fKeith Busch if (err) 449427e97080196548557b288517537ab7eb48c309fKeith Busch bp->err = err; 450427e97080196548557b288517537ab7eb48c309fKeith Busch 451427e97080196548557b288517537ab7eb48c309fKeith Busch if (atomic_dec_and_test(&bp->cnt)) { 452427e97080196548557b288517537ab7eb48c309fKeith Busch bio_endio(bp->parent, bp->err); 453427e97080196548557b288517537ab7eb48c309fKeith Busch if (bp->bv1) 454427e97080196548557b288517537ab7eb48c309fKeith Busch kfree(bp->bv1); 455427e97080196548557b288517537ab7eb48c309fKeith Busch if (bp->bv2) 456427e97080196548557b288517537ab7eb48c309fKeith Busch kfree(bp->bv2); 457427e97080196548557b288517537ab7eb48c309fKeith Busch kfree(bp); 458427e97080196548557b288517537ab7eb48c309fKeith Busch } 459427e97080196548557b288517537ab7eb48c309fKeith Busch} 460427e97080196548557b288517537ab7eb48c309fKeith Busch 461427e97080196548557b288517537ab7eb48c309fKeith Buschstatic struct nvme_bio_pair *nvme_bio_split(struct bio *bio, int idx, 462427e97080196548557b288517537ab7eb48c309fKeith Busch int len, int offset) 463427e97080196548557b288517537ab7eb48c309fKeith Busch{ 464427e97080196548557b288517537ab7eb48c309fKeith Busch struct nvme_bio_pair *bp; 465427e97080196548557b288517537ab7eb48c309fKeith Busch 466427e97080196548557b288517537ab7eb48c309fKeith Busch BUG_ON(len > bio->bi_size); 467427e97080196548557b288517537ab7eb48c309fKeith Busch BUG_ON(idx > bio->bi_vcnt); 468427e97080196548557b288517537ab7eb48c309fKeith Busch 469427e97080196548557b288517537ab7eb48c309fKeith Busch bp = kmalloc(sizeof(*bp), GFP_ATOMIC); 470427e97080196548557b288517537ab7eb48c309fKeith Busch if (!bp) 471427e97080196548557b288517537ab7eb48c309fKeith Busch return NULL; 472427e97080196548557b288517537ab7eb48c309fKeith Busch bp->err = 0; 473427e97080196548557b288517537ab7eb48c309fKeith Busch 474427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1 = *bio; 475427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2 = *bio; 476427e97080196548557b288517537ab7eb48c309fKeith Busch 477427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_size = len; 478427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_size -= len; 479427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_vcnt = idx; 480427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_idx = idx; 481427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_sector += len >> 9; 482427e97080196548557b288517537ab7eb48c309fKeith Busch 483427e97080196548557b288517537ab7eb48c309fKeith Busch if (offset) { 484427e97080196548557b288517537ab7eb48c309fKeith Busch bp->bv1 = kmalloc(bio->bi_max_vecs * sizeof(struct bio_vec), 485427e97080196548557b288517537ab7eb48c309fKeith Busch GFP_ATOMIC); 486427e97080196548557b288517537ab7eb48c309fKeith Busch if (!bp->bv1) 487427e97080196548557b288517537ab7eb48c309fKeith Busch goto split_fail_1; 488427e97080196548557b288517537ab7eb48c309fKeith Busch 489427e97080196548557b288517537ab7eb48c309fKeith Busch bp->bv2 = kmalloc(bio->bi_max_vecs * sizeof(struct bio_vec), 490427e97080196548557b288517537ab7eb48c309fKeith Busch GFP_ATOMIC); 491427e97080196548557b288517537ab7eb48c309fKeith Busch if (!bp->bv2) 492427e97080196548557b288517537ab7eb48c309fKeith Busch goto split_fail_2; 493427e97080196548557b288517537ab7eb48c309fKeith Busch 494427e97080196548557b288517537ab7eb48c309fKeith Busch memcpy(bp->bv1, bio->bi_io_vec, 495427e97080196548557b288517537ab7eb48c309fKeith Busch bio->bi_max_vecs * sizeof(struct bio_vec)); 496427e97080196548557b288517537ab7eb48c309fKeith Busch memcpy(bp->bv2, bio->bi_io_vec, 497427e97080196548557b288517537ab7eb48c309fKeith Busch bio->bi_max_vecs * sizeof(struct bio_vec)); 498427e97080196548557b288517537ab7eb48c309fKeith Busch 499427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_io_vec = bp->bv1; 500427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_io_vec = bp->bv2; 501427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_io_vec[idx].bv_offset += offset; 502427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_io_vec[idx].bv_len -= offset; 503427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_io_vec[idx].bv_len = offset; 504427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_vcnt++; 505427e97080196548557b288517537ab7eb48c309fKeith Busch } else 506427e97080196548557b288517537ab7eb48c309fKeith Busch bp->bv1 = bp->bv2 = NULL; 507427e97080196548557b288517537ab7eb48c309fKeith Busch 508427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_private = bp; 509427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_private = bp; 510427e97080196548557b288517537ab7eb48c309fKeith Busch 511427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b1.bi_end_io = nvme_bio_pair_endio; 512427e97080196548557b288517537ab7eb48c309fKeith Busch bp->b2.bi_end_io = nvme_bio_pair_endio; 513427e97080196548557b288517537ab7eb48c309fKeith Busch 514427e97080196548557b288517537ab7eb48c309fKeith Busch bp->parent = bio; 515427e97080196548557b288517537ab7eb48c309fKeith Busch atomic_set(&bp->cnt, 2); 516427e97080196548557b288517537ab7eb48c309fKeith Busch 517427e97080196548557b288517537ab7eb48c309fKeith Busch return bp; 518427e97080196548557b288517537ab7eb48c309fKeith Busch 519427e97080196548557b288517537ab7eb48c309fKeith Busch split_fail_2: 520427e97080196548557b288517537ab7eb48c309fKeith Busch kfree(bp->bv1); 521427e97080196548557b288517537ab7eb48c309fKeith Busch split_fail_1: 522427e97080196548557b288517537ab7eb48c309fKeith Busch kfree(bp); 523427e97080196548557b288517537ab7eb48c309fKeith Busch return NULL; 524427e97080196548557b288517537ab7eb48c309fKeith Busch} 525427e97080196548557b288517537ab7eb48c309fKeith Busch 526427e97080196548557b288517537ab7eb48c309fKeith Buschstatic int nvme_split_and_submit(struct bio *bio, struct nvme_queue *nvmeq, 527427e97080196548557b288517537ab7eb48c309fKeith Busch int idx, int len, int offset) 528427e97080196548557b288517537ab7eb48c309fKeith Busch{ 529427e97080196548557b288517537ab7eb48c309fKeith Busch struct nvme_bio_pair *bp = nvme_bio_split(bio, idx, len, offset); 530427e97080196548557b288517537ab7eb48c309fKeith Busch if (!bp) 531427e97080196548557b288517537ab7eb48c309fKeith Busch return -ENOMEM; 532427e97080196548557b288517537ab7eb48c309fKeith Busch 533427e97080196548557b288517537ab7eb48c309fKeith Busch if (bio_list_empty(&nvmeq->sq_cong)) 534427e97080196548557b288517537ab7eb48c309fKeith Busch add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 535427e97080196548557b288517537ab7eb48c309fKeith Busch bio_list_add(&nvmeq->sq_cong, &bp->b1); 536427e97080196548557b288517537ab7eb48c309fKeith Busch bio_list_add(&nvmeq->sq_cong, &bp->b2); 537427e97080196548557b288517537ab7eb48c309fKeith Busch 538427e97080196548557b288517537ab7eb48c309fKeith Busch return 0; 539427e97080196548557b288517537ab7eb48c309fKeith Busch} 540427e97080196548557b288517537ab7eb48c309fKeith Busch 5411ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox/* NVMe scatterlists require no holes in the virtual address */ 5421ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox#define BIOVEC_NOT_VIRT_MERGEABLE(vec1, vec2) ((vec2)->bv_offset || \ 5431ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox (((vec1)->bv_offset + (vec1)->bv_len) % PAGE_SIZE)) 5441ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox 545427e97080196548557b288517537ab7eb48c309fKeith Buschstatic int nvme_map_bio(struct nvme_queue *nvmeq, struct nvme_iod *iod, 546b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio, enum dma_data_direction dma_dir, int psegs) 547b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 548768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox struct bio_vec *bvec, *bvprv = NULL; 549768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox struct scatterlist *sg = NULL; 550159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch int i, length = 0, nsegs = 0, split_len = bio->bi_size; 551159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch 552159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if (nvmeq->dev->stripe_size) 553159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch split_len = nvmeq->dev->stripe_size - 554159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch ((bio->bi_sector << 9) & (nvmeq->dev->stripe_size - 1)); 555b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 556eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg_init_table(iod->sg, psegs); 557b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_for_each_segment(bvec, bio, i) { 558768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox if (bvprv && BIOVEC_PHYS_MERGEABLE(bvprv, bvec)) { 559768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg->length += bvec->bv_len; 560768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } else { 5611ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox if (bvprv && BIOVEC_NOT_VIRT_MERGEABLE(bvprv, bvec)) 562427e97080196548557b288517537ab7eb48c309fKeith Busch return nvme_split_and_submit(bio, nvmeq, i, 563427e97080196548557b288517537ab7eb48c309fKeith Busch length, 0); 564427e97080196548557b288517537ab7eb48c309fKeith Busch 565eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = sg ? sg + 1 : iod->sg; 566768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_set_page(sg, bvec->bv_page, bvec->bv_len, 567768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvec->bv_offset); 568768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox nsegs++; 569768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } 570159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch 571159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if (split_len - length < bvec->bv_len) 572159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch return nvme_split_and_submit(bio, nvmeq, i, split_len, 573159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch split_len - length); 5741ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox length += bvec->bv_len; 575768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvprv = bvec; 576b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 577eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->nents = nsegs; 578768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_mark_end(sg); 579427e97080196548557b288517537ab7eb48c309fKeith Busch if (dma_map_sg(nvmeq->q_dmadev, iod->sg, iod->nents, dma_dir) == 0) 5801ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return -ENOMEM; 581427e97080196548557b288517537ab7eb48c309fKeith Busch 582159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch BUG_ON(length != bio->bi_size); 5831ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return length; 584b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 585b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 5860e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch/* 5870e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * We reuse the small pool to allocate the 16-byte range here as it is not 5880e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * worth having a special pool for these or additional cases to handle freeing 5890e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * the iod. 5900e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch */ 5910e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic int nvme_submit_discard(struct nvme_queue *nvmeq, struct nvme_ns *ns, 5920e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct bio *bio, struct nvme_iod *iod, int cmdid) 5930e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 5940e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct nvme_dsm_range *range; 5950e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 5960e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 5970e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range = dma_pool_alloc(nvmeq->dev->prp_small_pool, GFP_ATOMIC, 5980e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch &iod->first_dma); 5990e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (!range) 6000e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return -ENOMEM; 6010e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6020e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch iod_list(iod)[0] = (__le64 *)range; 6030e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch iod->npages = 0; 6040e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6050e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range->cattr = cpu_to_le32(0); 6060e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range->nlb = cpu_to_le32(bio->bi_size >> ns->lba_shift); 607063cc6d5591ea9c0631b81ac5c7b829d99738b2fMatthew Wilcox range->slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_sector)); 6080e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6090e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch memset(cmnd, 0, sizeof(*cmnd)); 6100e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.opcode = nvme_cmd_dsm; 6110e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.command_id = cmdid; 6120e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nsid = cpu_to_le32(ns->ns_id); 6130e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.prp1 = cpu_to_le64(iod->first_dma); 6140e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nr = 0; 6150e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); 6160e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6170e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (++nvmeq->sq_tail == nvmeq->q_depth) 6180e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvmeq->sq_tail = 0; 6190e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch writel(nvmeq->sq_tail, nvmeq->q_db); 6200e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 6210e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return 0; 6220e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 6230e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 62400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcoxstatic int nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns, 62500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid) 62600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 62700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 62800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 62900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 63000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.opcode = nvme_cmd_flush; 63100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.command_id = cmdid; 63200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.nsid = cpu_to_le32(ns->ns_id); 63300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 63400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 63500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox nvmeq->sq_tail = 0; 63600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 63700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 63800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return 0; 63900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 64000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 6415d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns) 64200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 64300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid = alloc_cmdid(nvmeq, (void *)CMD_CTX_FLUSH, 644ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox special_completion, NVME_IO_TIMEOUT); 64500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (unlikely(cmdid < 0)) 64600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return cmdid; 64700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 64800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 64900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 65000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 651184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 652184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 653184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 654b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns, 655b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio) 656b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 657ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox struct nvme_command *cmnd; 658eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 659b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox enum dma_data_direction dma_dir; 6601287dabd345f447bbe0f7a99fc95ab89bcfc0f5dWei Yongjun int cmdid, length, result; 661b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 control; 662b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 dsmgmt; 663b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int psegs = bio_phys_segments(ns->queue, bio); 664b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 66500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && psegs) { 66600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox result = nvme_submit_flush_data(nvmeq, ns); 66700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (result) 66800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return result; 66900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox } 67000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 6711287dabd345f447bbe0f7a99fc95ab89bcfc0f5dWei Yongjun result = -ENOMEM; 672eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(psegs, bio->bi_size, GFP_ATOMIC); 673eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!iod) 674eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox goto nomem; 675eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->private = bio; 676b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 677eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox result = -EBUSY; 678ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox cmdid = alloc_cmdid(nvmeq, iod, bio_completion, NVME_IO_TIMEOUT); 679b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (unlikely(cmdid < 0)) 680eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 681b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 6820e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (bio->bi_rw & REQ_DISCARD) { 6830e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch result = nvme_submit_discard(nvmeq, ns, bio, iod, cmdid); 6840e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (result) 6850e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch goto free_cmdid; 6860e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return result; 6870e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch } 68800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && !psegs) 68900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 69000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 691b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control = 0; 692b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_FUA) 693b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_FUA; 694b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & (REQ_FAILFAST_DEV | REQ_RAHEAD)) 695b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_LR; 696b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 697b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt = 0; 698b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_RAHEAD) 699b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; 700b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 701ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 702b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 703b8deb62cf271fa9381edc8cf52bcae2f0225c55aMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 704b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio_data_dir(bio)) { 705ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_write; 706b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_TO_DEVICE; 707b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } else { 708ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_read; 709b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_FROM_DEVICE; 710b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 711b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 712427e97080196548557b288517537ab7eb48c309fKeith Busch result = nvme_map_bio(nvmeq, iod, bio, dma_dir, psegs); 713427e97080196548557b288517537ab7eb48c309fKeith Busch if (result <= 0) 714859361a228258edf4821d9f5635825033eca78e8Keith Busch goto free_cmdid; 7151ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox length = result; 716b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 717ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.command_id = cmdid; 718ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.nsid = cpu_to_le32(ns->ns_id); 719eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(nvmeq->dev, &cmnd->common, iod, length, 720eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_ATOMIC); 721063cc6d5591ea9c0631b81ac5c7b829d99738b2fMatthew Wilcox cmnd->rw.slba = cpu_to_le64(nvme_block_nr(ns, bio->bi_sector)); 7221ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox cmnd->rw.length = cpu_to_le16((length >> ns->lba_shift) - 1); 723ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.control = cpu_to_le16(control); 724ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); 725b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7266198221fa0df0298513b35796f63f242ea97134eKeith Busch nvme_start_io_acct(bio); 727b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 728b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = 0; 7297547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 730b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7311974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox return 0; 7321974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox 733859361a228258edf4821d9f5635825033eca78e8Keith Busch free_cmdid: 734859361a228258edf4821d9f5635825033eca78e8Keith Busch free_cmdid(nvmeq, cmdid, NULL); 735eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 736eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(nvmeq->dev, iod); 737eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox nomem: 738eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox return result; 739b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 740b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 741e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcoxstatic int nvme_process_cq(struct nvme_queue *nvmeq) 742b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 743821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox u16 head, phase; 744b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 745b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = nvmeq->cq_head; 746821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = nvmeq->cq_phase; 747b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 748b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (;;) { 749c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 750c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 751b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion cqe = nvmeq->cqes[head]; 752821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != phase) 753b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox break; 754b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_head = le16_to_cpu(cqe.sq_head); 755b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++head == nvmeq->q_depth) { 756b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = 0; 757821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = !phase; 758b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 759b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 760c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = free_cmdid(nvmeq, cqe.command_id, &fn); 7615c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox fn(nvmeq->dev, ctx, &cqe); 762b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 763b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 764b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* If the controller ignores the cq head doorbell and continuously 765b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * writes to the queue, it is theoretically possible to wrap around 766b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the queue twice and mistakenly return IRQ_NONE. Linux only 767b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * requires that 0.1% of your interrupts are handled, so this isn't 768b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * a big problem. 769b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 770821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) 771e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox return 0; 772b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 773f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox writel(head, nvmeq->q_db + (1 << nvmeq->dev->db_stride)); 774b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = head; 775821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = phase; 776b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 777e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox nvmeq->cqe_seen = 1; 778e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox return 1; 779b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 780b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7817d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcoxstatic void nvme_make_request(struct request_queue *q, struct bio *bio) 7827d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox{ 7837d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox struct nvme_ns *ns = q->queuedata; 7847d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox struct nvme_queue *nvmeq = get_nvmeq(ns->dev); 7857d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox int result = -EBUSY; 7867d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox 7877d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 7887d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 7897d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox result = nvme_submit_bio_queue(nvmeq, ns, bio); 7907d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox if (unlikely(result)) { 7917d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 7927d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 7937d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox bio_list_add(&nvmeq->sq_cong, bio); 7947d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox } 7957d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox 7967d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox nvme_process_cq(nvmeq); 7977d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 7987d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox put_nvmeq(nvmeq); 7997d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox} 8007d8224574cbd2326a6be00f319f5f7597abec3f6Matthew Wilcox 801b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_irq(int irq, void *data) 802b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 80358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox irqreturn_t result; 80458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 80558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_lock(&nvmeq->q_lock); 806e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox nvme_process_cq(nvmeq); 807e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox result = nvmeq->cqe_seen ? IRQ_HANDLED : IRQ_NONE; 808e9539f47525ecee05c9f22c3565885f3e9492c52Matthew Wilcox nvmeq->cqe_seen = 0; 80958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_unlock(&nvmeq->q_lock); 81058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return result; 81158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 81258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 81358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic irqreturn_t nvme_irq_check(int irq, void *data) 81458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox{ 81558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 81658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; 81758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) 81858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_NONE; 81958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_WAKE_THREAD; 82058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 82158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 8223c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcoxstatic void nvme_abort_command(struct nvme_queue *nvmeq, int cmdid) 8233c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 8243c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 825c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cancel_cmdid(nvmeq, cmdid, NULL); 8263c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 8273c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 8283c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 829c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstruct sync_cmd_info { 830c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct task_struct *task; 831c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox u32 result; 832c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox int status; 833c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox}; 834c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 8355c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void sync_completion(struct nvme_dev *dev, void *ctx, 836c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 837c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 838c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct sync_cmd_info *cmdinfo = ctx; 839c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->result = le32_to_cpup(&cqe->result); 840c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; 841c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox wake_up_process(cmdinfo->task); 842c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 843c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 844b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 845b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Returns 0 on success. If the result is negative, it's a Linux error code; 846b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * if the result is positive, it's an NVM Express status code 847b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 8485d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_sync_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd, 8495d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma u32 *result, unsigned timeout) 850b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 851b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 852b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct sync_cmd_info cmdinfo; 853b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 854b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.task = current; 855b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.status = -EINTR; 856b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 857c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdid = alloc_cmdid_killable(nvmeq, &cmdinfo, sync_completion, 858e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox timeout); 859b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid < 0) 860b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 861b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmd->common.command_id = cmdid; 862b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8633c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox set_current_state(TASK_KILLABLE); 8643c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_submit_cmd(nvmeq, cmd); 86578f8d2577bd79ce9d62f4d9e6d3b895bd1dd1d1dKeith Busch schedule_timeout(timeout); 866b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8673c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox if (cmdinfo.status == -EINTR) { 8683c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_abort_command(nvmeq, cmdid); 8693c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox return -EINTR; 8703c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox } 8713c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 872b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 873b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox *result = cmdinfo.result; 874b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 875b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdinfo.status; 876b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 877b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 8785d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd, 879b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 *result) 880b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 881e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return nvme_submit_sync_cmd(dev->queues[0], cmd, result, ADMIN_TIMEOUT); 882b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 883b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 884b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) 885b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 886b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 887b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 888b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 889b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 890b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.opcode = opcode; 891b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.qid = cpu_to_le16(id); 892b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 893b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 894b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 895b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 896b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 897b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 898b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 899b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, 900b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 901b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 902b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 903b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 904b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; 905b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 906b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 907b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.opcode = nvme_admin_create_cq; 908b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); 909b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cqid = cpu_to_le16(qid); 910b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 911b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cq_flags = cpu_to_le16(flags); 912b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); 913b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 914b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 915b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 916b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 917b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 918b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 919b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 920b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, 921b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 922b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 923b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 924b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 925b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; 926b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 927b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 928b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.opcode = nvme_admin_create_sq; 929b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); 930b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sqid = cpu_to_le16(qid); 931b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 932b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sq_flags = cpu_to_le16(flags); 933b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.cqid = cpu_to_le16(qid); 934b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 935b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 936b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 937b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 938b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 939b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 940b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 941b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) 942b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 943b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); 944b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 945b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 946b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) 947b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 948b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); 949b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 950b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9515d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns, 952bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox dma_addr_t dma_addr) 953bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 954bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 955bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 956bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 957bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.opcode = nvme_admin_identify; 958bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.nsid = cpu_to_le32(nsid); 959bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.prp1 = cpu_to_le64(dma_addr); 960bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.cns = cpu_to_le32(cns); 961bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 962bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, NULL); 963bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 964bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 9655d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid, 96608df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr_t dma_addr, u32 *result) 967bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 968bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 969bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 970bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 971bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.opcode = nvme_admin_get_features; 972a42ceccef0c43b46ff6bc1b12a7c1076ef243df1Keith Busch c.features.nsid = cpu_to_le32(nsid); 973bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 974bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.fid = cpu_to_le32(fid); 975bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 97608df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch return nvme_submit_admin_cmd(dev, &c, result); 977df3481399042200792822b6243e36a95a557b57eMatthew Wilcox} 978df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 9795d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermaint nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11, 9805d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma dma_addr_t dma_addr, u32 *result) 981df3481399042200792822b6243e36a95a557b57eMatthew Wilcox{ 982df3481399042200792822b6243e36a95a557b57eMatthew Wilcox struct nvme_command c; 983df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 984df3481399042200792822b6243e36a95a557b57eMatthew Wilcox memset(&c, 0, sizeof(c)); 985df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.opcode = nvme_admin_set_features; 986df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 987df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.fid = cpu_to_le32(fid); 988df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.dword11 = cpu_to_le32(dword11); 989df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 990bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, result); 991bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 992bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 993a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox/** 994a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * nvme_cancel_ios - Cancel outstanding I/Os 995a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @queue: The queue to cancel I/Os on 996a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @timeout: True to only cancel I/Os which have timed out 997a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox */ 998a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcoxstatic void nvme_cancel_ios(struct nvme_queue *nvmeq, bool timeout) 999a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox{ 1000a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int depth = nvmeq->q_depth - 1; 1001a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 1002a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox unsigned long now = jiffies; 1003a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int cmdid; 1004a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1005a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox for_each_set_bit(cmdid, nvmeq->cmdid_data, depth) { 1006a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox void *ctx; 1007a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_completion_fn fn; 1008a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox static struct nvme_completion cqe = { 1009af2d9ca744af5e03390eeb3864d08ce75c860899Matthew Wilcox .status = cpu_to_le16(NVME_SC_ABORT_REQ << 1), 1010a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox }; 1011a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1012a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox if (timeout && !time_after(now, info[cmdid].timeout)) 1013a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox continue; 1014053ab702cc2702f25a97ead087ed344b864785b7Keith Busch if (info[cmdid].ctx == CMD_CTX_CANCELLED) 1015053ab702cc2702f25a97ead087ed344b864785b7Keith Busch continue; 1016a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox dev_warn(nvmeq->q_dmadev, "Cancelling I/O %d\n", cmdid); 1017a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox ctx = cancel_cmdid(nvmeq, cmdid, &fn); 1018a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox fn(nvmeq->dev, ctx, &cqe); 1019a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox } 1020a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox} 1021a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 10229e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcoxstatic void nvme_free_queue_mem(struct nvme_queue *nvmeq) 10239e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox{ 10249e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 10259e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 10269e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 10279e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 10289e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox kfree(nvmeq); 10299e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox} 10309e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 1031b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_free_queue(struct nvme_dev *dev, int qid) 1032b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1033b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = dev->queues[qid]; 1034aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox int vector = dev->entry[nvmeq->cq_vector].vector; 1035b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1036a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1037a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_cancel_ios(nvmeq, false); 10383295874b6074d749516d6decd43afad7bf6e38ffKeith Busch while (bio_list_peek(&nvmeq->sq_cong)) { 10393295874b6074d749516d6decd43afad7bf6e38ffKeith Busch struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 10403295874b6074d749516d6decd43afad7bf6e38ffKeith Busch bio_endio(bio, -EIO); 10413295874b6074d749516d6decd43afad7bf6e38ffKeith Busch } 1042a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 1043a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 1044aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox irq_set_affinity_hint(vector, NULL); 1045aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox free_irq(vector, nvmeq); 1046b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1047b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* Don't tell the adapter to delete the admin queue */ 1048b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (qid) { 1049b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 1050b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 1051b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1052b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10539e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox nvme_free_queue_mem(nvmeq); 1054b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1055b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1056b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, 1057b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int depth, int vector) 1058b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1059b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 1060a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch unsigned extra = DIV_ROUND_UP(depth, 8) + (depth * 1061a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch sizeof(struct nvme_cmd_info)); 1062b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq) + extra, GFP_KERNEL); 1063b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq) 1064b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1065b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1066b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cqes = dma_alloc_coherent(dmadev, CQ_SIZE(depth), 1067b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->cq_dma_addr, GFP_KERNEL); 1068b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->cqes) 1069b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 1070b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset((void *)nvmeq->cqes, 0, CQ_SIZE(depth)); 1071b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1072b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds = dma_alloc_coherent(dmadev, SQ_SIZE(depth), 1073b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->sq_dma_addr, GFP_KERNEL); 1074b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->sq_cmds) 1075b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_cqdma; 1076b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1077b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_dmadev = dmadev; 1078091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvmeq->dev = dev; 1079b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_init(&nvmeq->q_lock); 1080b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = 0; 1081821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = 1; 1082b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox init_waitqueue_head(&nvmeq->sq_full); 10831fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox init_waitqueue_entry(&nvmeq->sq_cong_wait, nvme_thread); 1084b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_init(&nvmeq->sq_cong); 1085f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox nvmeq->q_db = &dev->dbs[qid << (dev->db_stride + 1)]; 1086b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_depth = depth; 1087b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_vector = vector; 1088b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1089b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 1090b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1091b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_cqdma: 109268b8eca5f882230e4991df0db0a3094f49420a90Keith Busch dma_free_coherent(dmadev, CQ_SIZE(depth), (void *)nvmeq->cqes, 1093b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_dma_addr); 1094b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 1095b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 1096b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1097b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1098b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10993001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcoxstatic int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, 11003001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox const char *name) 11013001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox{ 110258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if (use_threaded_interrupts) 110358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, 1104ec6ce618d65b5ce1bef83a5509255107a0feac44Matthew Wilcox nvme_irq_check, nvme_irq, 110558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox IRQF_DISABLED | IRQF_SHARED, 110658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox name, nvmeq); 11073001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, 11083001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox IRQF_DISABLED | IRQF_SHARED, name, nvmeq); 11093001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox} 11103001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox 11118d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic struct nvme_queue *nvme_create_queue(struct nvme_dev *dev, int qid, 11128d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartman int cq_size, int vector) 1113b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1114b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int result; 1115b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = nvme_alloc_queue(dev, qid, cq_size, vector); 1116b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 11173f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox if (!nvmeq) 11186f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return ERR_PTR(-ENOMEM); 11193f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox 1120b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_cq(dev, qid, nvmeq); 1121b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1122b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 1123b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1124b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_sq(dev, qid, nvmeq); 1125b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1126b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_cq; 1127b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 11283001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme"); 1129b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 1130b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_sq; 1131b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1132b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 1133b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1134b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_sq: 1135b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 1136b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_cq: 1137b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 1138b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 1139b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 1140b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 1141b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 1142b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 1143b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 11446f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return ERR_PTR(result); 1145b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1146b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1147ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_wait_ready(struct nvme_dev *dev, u64 cap, bool enabled) 1148ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 1149ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox unsigned long timeout; 1150ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox u32 bit = enabled ? NVME_CSTS_RDY : 0; 1151ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1152ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; 1153ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1154ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox while ((readl(&dev->bar->csts) & NVME_CSTS_RDY) != bit) { 1155ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox msleep(100); 1156ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (fatal_signal_pending(current)) 1157ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return -EINTR; 1158ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (time_after(jiffies, timeout)) { 1159ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox dev_err(&dev->pci_dev->dev, 1160ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox "Device not ready; aborting initialisation\n"); 1161ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return -ENODEV; 1162ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox } 1163ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox } 1164ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1165ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return 0; 1166ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1167ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1168ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox/* 1169ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * If the device has been passed off to us in an enabled state, just clear 1170ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * the enabled bit. The spec says we should set the 'shutdown notification 1171ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * bits', but doing so may cause the device to complete commands to the 1172ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox * admin queue ... and we don't know what memory that might be pointing at! 1173ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox */ 1174ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_disable_ctrl(struct nvme_dev *dev, u64 cap) 1175ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 117644af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox u32 cc = readl(&dev->bar->cc); 117744af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox 117844af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox if (cc & NVME_CC_ENABLE) 117944af146a84fa4a8e136d824207dcd356958a112bMatthew Wilcox writel(cc & ~NVME_CC_ENABLE, &dev->bar->cc); 1180ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return nvme_wait_ready(dev, cap, false); 1181ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1182ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1183ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcoxstatic int nvme_enable_ctrl(struct nvme_dev *dev, u64 cap) 1184ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox{ 1185ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return nvme_wait_ready(dev, cap, true); 1186ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox} 1187ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 11888d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_configure_admin_queue(struct nvme_dev *dev) 1189b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1190ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox int result; 1191b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 aqa; 1192ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox u64 cap = readq(&dev->bar->cap); 1193b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq; 1194b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1195b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 1196ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox dev->db_stride = NVME_CAP_STRIDE(cap); 1197ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox 1198ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox result = nvme_disable_ctrl(dev, cap); 1199ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox if (result < 0) 1200ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox return result; 1201b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1202b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq = nvme_alloc_queue(dev, 0, 64, 0); 12033f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox if (!nvmeq) 12043f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox return -ENOMEM; 1205b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1206b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa = nvmeq->q_depth - 1; 1207b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa |= aqa << 16; 1208b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1209b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config = NVME_CC_ENABLE | NVME_CC_CSS_NVM; 1210b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= (PAGE_SHIFT - 12) << NVME_CC_MPS_SHIFT; 1211b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; 12127f53f9d2424533256ae86f7df5661a17de743de8Matthew Wilcox dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; 1213b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1214b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(aqa, &dev->bar->aqa); 1215b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->sq_dma_addr, &dev->bar->asq); 1216b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->cq_dma_addr, &dev->bar->acq); 1217b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(dev->ctrl_config, &dev->bar->cc); 1218b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1219ba47e3865e8023e79b670793a41508222b5f0322Matthew Wilcox result = nvme_enable_ctrl(dev, cap); 1220025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch if (result) 1221025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch goto free_q; 12229e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 12233001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme admin"); 1224025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch if (result) 1225025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch goto free_q; 1226025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch 1227b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->queues[0] = nvmeq; 1228b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1229025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch 1230025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch free_q: 1231025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch nvme_free_queue_mem(nvmeq); 1232025c557a71bd06a9f6d32259f00e2218b15bf0a4Keith Busch return result; 1233b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1234b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12355d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermastruct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write, 1236eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned long addr, unsigned length) 1237b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 123836c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox int i, err, count, nents, offset; 12397fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct scatterlist *sg; 12407fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct page **pages; 1241eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 124236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 124336c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (addr & 3) 1244eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 12455460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter if (!length || length > INT_MAX - PAGE_SIZE) 1246eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 12477fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 124836c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox offset = offset_in_page(addr); 12497fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox count = DIV_ROUND_UP(offset + length, PAGE_SIZE); 12507fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox pages = kcalloc(count, sizeof(*pages), GFP_KERNEL); 125122fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter if (!pages) 125222fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter return ERR_PTR(-ENOMEM); 125336c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 125436c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = get_user_pages_fast(addr, count, 1, pages); 125536c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (err < count) { 125636c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox count = err; 125736c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = -EFAULT; 125836c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox goto put_pages; 125936c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox } 12607fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 1261eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(count, length, GFP_KERNEL); 1262eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = iod->sg; 126336c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox sg_init_table(sg, count); 1264d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox for (i = 0; i < count; i++) { 1265d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox sg_set_page(&sg[i], pages[i], 12665460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter min_t(unsigned, length, PAGE_SIZE - offset), 12675460fc03105fbed01fe27aa572d9f65bb410a61dDan Carpenter offset); 1268d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox length -= (PAGE_SIZE - offset); 1269d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox offset = 0; 12707fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox } 1271fe304c43c6d63e29ed4fc46a874d7a74313788c5Matthew Wilcox sg_mark_end(&sg[i - 1]); 12721c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox iod->nents = count; 12737fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 12747fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox err = -ENOMEM; 12757fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox nents = dma_map_sg(&dev->pci_dev->dev, sg, count, 12767fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 127736c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (!nents) 1278eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 1279b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12807fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1281eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 1282b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1283eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 1284eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 12857fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_pages: 12867fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox for (i = 0; i < count; i++) 12877fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_page(pages[i]); 12887fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1289eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(err); 12907fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1291b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12925d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Vermavoid nvme_unmap_user_pages(struct nvme_dev *dev, int write, 12931c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox struct nvme_iod *iod) 12947fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox{ 12951c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox int i; 1296b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12971c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 12981c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 12997fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 13001c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox for (i = 0; i < iod->nents; i++) 13011c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox put_page(sg_page(&iod->sg[i])); 13027fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1303b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1304a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcoxstatic int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) 1305a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox{ 1306a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_dev *dev = ns->dev; 1307a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_queue *nvmeq; 1308a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_user_io io; 1309a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_command c; 1310f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch unsigned length, meta_len; 1311f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int status, i; 1312f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch struct nvme_iod *iod, *meta_iod = NULL; 1313f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch dma_addr_t meta_dma_addr; 1314f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch void *meta, *uninitialized_var(meta_mem); 1315a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1316a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox if (copy_from_user(&io, uio, sizeof(io))) 1317a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return -EFAULT; 13186c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox length = (io.nblocks + 1) << ns->lba_shift; 1319f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_len = (io.nblocks + 1) * ns->ms; 1320f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1321f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len && ((io.metadata & 3) || !io.metadata)) 1322f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch return -EINVAL; 13236c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 13246c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox switch (io.opcode) { 13256c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_write: 13266c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_read: 13276bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case nvme_cmd_compare: 1328eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_map_user_pages(dev, io.opcode & 1, io.addr, length); 13296413214c5d424fd5aae6567848340f962ad2ce0fMatthew Wilcox break; 13306c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox default: 13316bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EINVAL; 13326c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox } 13336c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 1334eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1335eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1336a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1337a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox memset(&c, 0, sizeof(c)); 1338a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.opcode = io.opcode; 1339a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.flags = io.flags; 13406c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.nsid = cpu_to_le32(ns->ns_id); 1341a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.slba = cpu_to_le64(io.slba); 13426c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.length = cpu_to_le16(io.nblocks); 1343a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.control = cpu_to_le16(io.control); 13441c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.dsmgmt = cpu_to_le32(io.dsmgmt); 13451c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.reftag = cpu_to_le32(io.reftag); 13461c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.apptag = cpu_to_le16(io.apptag); 13471c9b52651dad0ff1fa71fc6205c86d972f25bcc0Matthew Wilcox c.rw.appmask = cpu_to_le16(io.appmask); 1348f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1349f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len) { 1350f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod = nvme_map_user_pages(dev, io.opcode & 1, io.metadata, meta_len); 1351f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (IS_ERR(meta_iod)) { 1352f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch status = PTR_ERR(meta_iod); 1353f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod = NULL; 1354f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch goto unmap; 1355f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1356f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1357f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_mem = dma_alloc_coherent(&dev->pci_dev->dev, meta_len, 1358f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch &meta_dma_addr, GFP_KERNEL); 1359f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (!meta_mem) { 1360f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch status = -ENOMEM; 1361f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch goto unmap; 1362f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1363f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1364f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (io.opcode & 1) { 1365f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int meta_offset = 0; 1366f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1367f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch for (i = 0; i < meta_iod->nents; i++) { 1368f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta = kmap_atomic(sg_page(&meta_iod->sg[i])) + 1369f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].offset; 1370f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch memcpy(meta_mem + meta_offset, meta, 1371f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].length); 1372f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch kunmap_atomic(meta); 1373f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_offset += meta_iod->sg[i].length; 1374f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1375f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1376f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1377f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch c.rw.metadata = cpu_to_le64(meta_dma_addr); 1378f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1379f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1380eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, GFP_KERNEL); 1381a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1382040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox nvmeq = get_nvmeq(dev); 1383fa92282149842645931580225647238428374758Matthew Wilcox /* 1384fa92282149842645931580225647238428374758Matthew Wilcox * Since nvme_submit_sync_cmd sleeps, we can't keep preemption 1385b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * disabled. We may be preempted at any point, and be rescheduled 1386b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * to a different CPU. That will cause cacheline bouncing, but no 1387b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * additional races since q_lock already protects against other CPUs. 1388b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox */ 1389a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox put_nvmeq(nvmeq); 1390b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (length != (io.nblocks + 1) << ns->lba_shift) 1391b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1392b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 1393ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox status = nvme_submit_sync_cmd(nvmeq, &c, NULL, NVME_IO_TIMEOUT); 1394a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1395f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_len) { 1396f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (status == NVME_SC_SUCCESS && !(io.opcode & 1)) { 1397f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch int meta_offset = 0; 1398f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1399f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch for (i = 0; i < meta_iod->nents; i++) { 1400f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta = kmap_atomic(sg_page(&meta_iod->sg[i])) + 1401f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].offset; 1402f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch memcpy(meta, meta_mem + meta_offset, 1403f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_iod->sg[i].length); 1404f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch kunmap_atomic(meta); 1405f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_offset += meta_iod->sg[i].length; 1406f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1407f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1408f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1409f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch dma_free_coherent(&dev->pci_dev->dev, meta_len, meta_mem, 1410f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch meta_dma_addr); 1411f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1412f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1413f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch unmap: 14141c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, io.opcode & 1, iod); 1415eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 1416f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1417f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch if (meta_iod) { 1418f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch nvme_unmap_user_pages(dev, io.opcode & 1, meta_iod); 1419f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch nvme_free_iod(dev, meta_iod); 1420f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch } 1421f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch 1422a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return status; 1423a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox} 1424a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 142550af8baec46a99a9b81a4600c0374f83a5a590a9Keith Buschstatic int nvme_user_admin_cmd(struct nvme_dev *dev, 14266bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd __user *ucmd) 14276ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox{ 14286bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd cmd; 14296ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox struct nvme_command c; 1430eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int status, length; 1431c7d36ab8fa04c213328119a9c0d66985fe204ee5Keith Busch struct nvme_iod *uninitialized_var(iod); 143294f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch unsigned timeout; 14336ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 14346bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (!capable(CAP_SYS_ADMIN)) 14356bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EACCES; 14366bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (copy_from_user(&cmd, ucmd, sizeof(cmd))) 14376ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return -EFAULT; 14386ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 14396ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox memset(&c, 0, sizeof(c)); 14406bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.opcode = cmd.opcode; 14416bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.flags = cmd.flags; 14426bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.nsid = cpu_to_le32(cmd.nsid); 14436bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); 14446bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); 14456bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); 14466bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); 14476bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); 14486bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); 14496bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); 14506bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); 14516bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 14526bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox length = cmd.data_len; 14536bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 1454497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox iod = nvme_map_user_pages(dev, cmd.opcode & 1, cmd.addr, 1455497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox length); 1456eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1457eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1458eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, 1459eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_KERNEL); 14606bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 14616bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 146294f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch timeout = cmd.timeout_ms ? msecs_to_jiffies(cmd.timeout_ms) : 146394f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch ADMIN_TIMEOUT; 14646bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (length != cmd.data_len) 1465b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1466b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 146794f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch status = nvme_submit_sync_cmd(dev->queues[0], &c, &cmd.result, 146894f370cab6e5ac514b658c6b2b3aa308cefc5c7aKeith Busch timeout); 1469eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 14706bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 14711c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, cmd.opcode & 1, iod); 1472eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 14736bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 1474f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 1475cf90bc4830b858487fe4b9b9ecd0031e23ca3e83Chayan Biswas if ((status >= 0) && copy_to_user(&ucmd->result, &cmd.result, 1476f4f117f64baf8840d22266d518227b2a186d294bKeith Busch sizeof(cmd.result))) 1477f4f117f64baf8840d22266d518227b2a186d294bKeith Busch status = -EFAULT; 1478f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 14796ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return status; 14806ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox} 14816ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 1482b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, 1483b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long arg) 1484b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1485b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = bdev->bd_disk->private_data; 1486b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1487b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox switch (cmd) { 14886bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ID: 14896bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return ns->ns_id; 14906bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ADMIN_CMD: 149150af8baec46a99a9b81a4600c0374f83a5a590a9Keith Busch return nvme_user_admin_cmd(ns->dev, (void __user *)arg); 1492a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox case NVME_IOCTL_SUBMIT_IO: 1493a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return nvme_submit_io(ns, (void __user *)arg); 14945d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma case SG_GET_VERSION_NUM: 14955d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma return nvme_sg_get_version_num((void __user *)arg); 14965d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma case SG_IO: 14975d0f6131a79adfa1fb51309c5f81a2a4ef879dd4Vishal Verma return nvme_sg_io(ns, (void __user *)arg); 1498b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox default: 1499b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOTTY; 1500b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1501b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1502b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1503b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic const struct block_device_operations nvme_fops = { 1504b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .owner = THIS_MODULE, 1505b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .ioctl = nvme_ioctl, 15064948168280b269a514045766ddd872cfac5968e1Matthew Wilcox .compat_ioctl = nvme_ioctl, 1507b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1508b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 15091fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic void nvme_resubmit_bios(struct nvme_queue *nvmeq) 15101fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 15111fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (bio_list_peek(&nvmeq->sq_cong)) { 15121fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 15131fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_ns *ns = bio->bi_bdev->bd_disk->private_data; 1514427e97080196548557b288517537ab7eb48c309fKeith Busch 1515427e97080196548557b288517537ab7eb48c309fKeith Busch if (bio_list_empty(&nvmeq->sq_cong)) 1516427e97080196548557b288517537ab7eb48c309fKeith Busch remove_wait_queue(&nvmeq->sq_full, 1517427e97080196548557b288517537ab7eb48c309fKeith Busch &nvmeq->sq_cong_wait); 15181fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_submit_bio_queue(nvmeq, ns, bio)) { 1519427e97080196548557b288517537ab7eb48c309fKeith Busch if (bio_list_empty(&nvmeq->sq_cong)) 1520427e97080196548557b288517537ab7eb48c309fKeith Busch add_wait_queue(&nvmeq->sq_full, 1521427e97080196548557b288517537ab7eb48c309fKeith Busch &nvmeq->sq_cong_wait); 15221fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox bio_list_add_head(&nvmeq->sq_cong, bio); 15231fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox break; 15241fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 15251fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 15261fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 15271fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 15281fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic int nvme_kthread(void *data) 15291fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 15301fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_dev *dev; 15311fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 15321fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (!kthread_should_stop()) { 1533564a232c059913d91b491e04c2b2d670b8f94615Arjan van de Ven set_current_state(TASK_INTERRUPTIBLE); 15341fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 15351fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_for_each_entry(dev, &dev_list, node) { 15361fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox int i; 15371fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox for (i = 0; i < dev->queue_count; i++) { 15381fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_queue *nvmeq = dev->queues[i]; 1539740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (!nvmeq) 1540740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox continue; 15411fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 1542bc57a0f7a44cfcf3e9873f6c6b8dcecdca486b1fMatthew Wilcox nvme_process_cq(nvmeq); 1543a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_cancel_ios(nvmeq, true); 15441fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_resubmit_bios(nvmeq); 15451fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 15461fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 15471fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 15481fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 1549acb7aa0db09b8abd38abeb84334a8a27a52fbb1bArjan van de Ven schedule_timeout(round_jiffies_relative(HZ)); 15501fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 15511fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 15521fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 15531fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 15545aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic DEFINE_IDA(nvme_index_ida); 15555aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 15565aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic int nvme_get_ns_idx(void) 15575aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox{ 15585aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox int index, error; 15595aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 15605aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox do { 15615aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox if (!ida_pre_get(&nvme_index_ida, GFP_KERNEL)) 15625aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox return -1; 15635aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 15645aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_lock(&dev_list_lock); 15655aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox error = ida_get_new(&nvme_index_ida, &index); 15665aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_unlock(&dev_list_lock); 15675aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox } while (error == -EAGAIN); 15685aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 15695aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox if (error) 15705aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox index = -1; 15715aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox return index; 15725aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox} 15735aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 15745aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic void nvme_put_ns_idx(int index) 15755aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox{ 15765aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_lock(&dev_list_lock); 15775aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ida_remove(&nvme_index_ida, index); 15785aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_unlock(&dev_list_lock); 15795aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox} 15805aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 15810e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic void nvme_config_discard(struct nvme_ns *ns) 15820e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 15830e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch u32 logical_block_size = queue_logical_block_size(ns->queue); 15840e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_zeroes_data = 0; 15850e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_alignment = logical_block_size; 15860e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_granularity = logical_block_size; 15870e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.max_discard_sectors = 0xffffffff; 15880e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); 15890e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 15900e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 15915aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, int nsid, 1592b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_id_ns *id, struct nvme_lba_range_type *rt) 1593b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1594b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns; 1595b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct gendisk *disk; 1596b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int lbaf; 1597b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1598b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (rt->attributes & NVME_LBART_ATTRIB_HIDE) 1599b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1600b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1601b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns = kzalloc(sizeof(*ns), GFP_KERNEL); 1602b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns) 1603b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1604b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue = blk_alloc_queue(GFP_KERNEL); 1605b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns->queue) 1606b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_ns; 16074eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox ns->queue->queue_flags = QUEUE_FLAG_DEFAULT; 16084eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue); 16094eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); 1610b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_queue_make_request(ns->queue, nvme_make_request); 1611b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->dev = dev; 1612b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue->queuedata = ns; 1613b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1614b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk = alloc_disk(NVME_MINORS); 1615b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!disk) 1616b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_queue; 16175aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ns->ns_id = nsid; 1618b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->disk = disk; 1619b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox lbaf = id->flbas & 0xf; 1620b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->lba_shift = id->lbaf[lbaf].ds; 1621f410c680b5344f1cb63ff011c6ae3d4963f45c30Keith Busch ns->ms = le16_to_cpu(id->lbaf[lbaf].ms); 1622e9ef46369f5107e634a93b7fc4e62a1f53343197Keith Busch blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); 16238fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch if (dev->max_hw_sectors) 16248fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors); 1625b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1626b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->major = nvme_major; 1627b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->minors = NVME_MINORS; 16285aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox disk->first_minor = NVME_MINORS * nvme_get_ns_idx(); 1629b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->fops = &nvme_fops; 1630b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->private_data = ns; 1631b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->queue = ns->queue; 1632388f037f4e7f0a24bac6b1a24f144f5d939f58cfMatthew Wilcox disk->driverfs_dev = &dev->pci_dev->dev; 16335aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox sprintf(disk->disk_name, "nvme%dn%d", dev->instance, nsid); 1634b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); 1635b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 16360e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (dev->oncs & NVME_CTRL_ONCS_DSM) 16370e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvme_config_discard(ns); 16380e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 1639b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return ns; 1640b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1641b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_queue: 1642b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1643b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_ns: 1644b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1645b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1646b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1647b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1648b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_ns_free(struct nvme_ns *ns) 1649b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 16505aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox int index = ns->disk->first_minor / NVME_MINORS; 1651b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox put_disk(ns->disk); 16525aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox nvme_put_ns_idx(index); 1653b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1654b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1655b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1656b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1657b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcoxstatic int set_queue_count(struct nvme_dev *dev, int count) 1658b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1659b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 1660b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 result; 1661b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcox u32 q_count = (count - 1) | ((count - 1) << 16); 1662b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1663df3481399042200792822b6243e36a95a557b57eMatthew Wilcox status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0, 1664bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox &result); 1665b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 1666b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 1667b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return min(result & 0xffff, result >> 16) + 1; 1668b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1669b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 16708d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_setup_io_queues(struct nvme_dev *dev) 1671b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1672fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula struct pci_dev *pdev = dev->pci_dev; 1673063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox int result, cpu, i, vecs, nr_io_queues, db_bar_size, q_depth; 1674b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1675b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = num_online_cpus(); 1676b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox result = set_queue_count(dev, nr_io_queues); 16771b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox if (result < 0) 16781b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox return result; 1679b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox if (result < nr_io_queues) 1680b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = result; 1681b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 16821b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox /* Deregister the admin queue's interrupt */ 16831b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox free_irq(dev->entry[0].vector, dev->queues[0]); 16841b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1685f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox db_bar_size = 4096 + ((nr_io_queues + 1) << (dev->db_stride + 3)); 1686f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox if (db_bar_size > 8192) { 1687f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox iounmap(dev->bar); 1688fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula dev->bar = ioremap(pci_resource_start(pdev, 0), db_bar_size); 1689f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 1690f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->queues[0]->q_db = dev->dbs; 1691f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox } 1692f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox 1693063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = nr_io_queues; 1694063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox for (i = 0; i < vecs; i++) 16951b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->entry[i].entry = i; 16961b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox for (;;) { 1697063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox result = pci_enable_msix(pdev, dev->entry, vecs); 1698063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox if (result <= 0) 16991b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox break; 1700063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = result; 17011b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 17021b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1703063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox if (result < 0) { 1704063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = nr_io_queues; 1705063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox if (vecs > 32) 1706063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = 32; 1707fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula for (;;) { 1708063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox result = pci_enable_msi_block(pdev, vecs); 1709fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula if (result == 0) { 1710063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox for (i = 0; i < vecs; i++) 1711fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula dev->entry[i].vector = i + pdev->irq; 1712fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula break; 1713063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox } else if (result < 0) { 1714063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = 1; 1715fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula break; 1716fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula } 1717063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox vecs = result; 1718fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula } 1719fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula } 1720fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula 1721063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox /* 1722063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * Should investigate if there's a performance win from allocating 1723063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * more queues than interrupt vectors; it might allow the submission 1724063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * path to scale better, even if the receive path is limited by the 1725063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox * number of interrupts. 1726063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox */ 1727063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox nr_io_queues = vecs; 1728063a8096f3dbca7521d5918b3aea7ab46c5d2fe9Matthew Wilcox 17291b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox result = queue_request_irq(dev, dev->queues[0], "nvme admin"); 17301b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox /* XXX: handle failure here */ 17311b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 17321b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_first(cpu_online_mask); 1733b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) { 17341b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox irq_set_affinity_hint(dev->entry[i].vector, get_cpu_mask(cpu)); 17351b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_next(cpu, cpu_online_mask); 17361b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 17371b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1738a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch q_depth = min_t(int, NVME_CAP_MQES(readq(&dev->bar->cap)) + 1, 1739a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch NVME_Q_DEPTH); 1740b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) { 1741a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch dev->queues[i + 1] = nvme_create_queue(dev, i + 1, q_depth, i); 17426f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox if (IS_ERR(dev->queues[i + 1])) 17436f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return PTR_ERR(dev->queues[i + 1]); 17441b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queue_count++; 17451b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 1746b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 17479ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox for (; i < num_possible_cpus(); i++) { 17489ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox int target = i % rounddown_pow_of_two(dev->queue_count - 1); 17499ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox dev->queues[i + 1] = dev->queues[target + 1]; 17509ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox } 17519ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox 1752b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1753b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1754b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1755b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_free_queues(struct nvme_dev *dev) 1756b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1757b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int i; 1758b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1759b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (i = dev->queue_count - 1; i >= 0; i--) 1760b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queue(dev, i); 1761b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1762b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1763422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox/* 1764422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * Return: error value if an error occurred setting up the queues or calling 1765422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * Identify Device. 0 if these succeeded, even if adding some of the 1766422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * namespaces failed. At the moment, these failures are silent. TBD which 1767422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox * failures should be reported. 1768422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox */ 17698d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_dev_add(struct nvme_dev *dev) 1770b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1771b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int res, nn, i; 1772cbb6218fd4ae8f98ddf0d66f0826a7a3a9c88298Keith Busch struct nvme_ns *ns; 177351814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox struct nvme_id_ctrl *ctrl; 1774bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_id_ns *id_ns; 1775bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox void *mem; 1776b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t dma_addr; 1777159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12; 1778b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1779b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = nvme_setup_io_queues(dev); 1780b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1781b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 1782b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1783bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox mem = dma_alloc_coherent(&dev->pci_dev->dev, 8192, &dma_addr, 1784b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 1785a9ef4343afbe67a6abf83c0f0294e80db48e513aKeith Busch if (!mem) 1786a9ef4343afbe67a6abf83c0f0294e80db48e513aKeith Busch return -ENOMEM; 1787b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1788bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, 0, 1, dma_addr); 1789b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) { 1790b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = -EIO; 1791cbb6218fd4ae8f98ddf0d66f0826a7a3a9c88298Keith Busch goto out; 1792b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1793b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1794bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ctrl = mem; 179551814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox nn = le32_to_cpup(&ctrl->nn); 17960e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch dev->oncs = le16_to_cpup(&ctrl->oncs); 179751814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn)); 179851814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn)); 179951814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr)); 1800159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if (ctrl->mdts) 18018fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch dev->max_hw_sectors = 1 << (ctrl->mdts + shift - 9); 1802159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch if ((dev->pci_dev->vendor == PCI_VENDOR_ID_INTEL) && 1803159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch (dev->pci_dev->device == 0x0953) && ctrl->vs[3]) 1804159b67d7aefe3902df91075be5d80943c1570aa8Keith Busch dev->stripe_size = 1 << (ctrl->vs[3] + shift); 1805b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1806bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox id_ns = mem; 18072b2c1896871838cdf549442e8ad0264be5fa74e3Matthew Wilcox for (i = 1; i <= nn; i++) { 1808bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, i, 0, dma_addr); 1809b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1810b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1811b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1812bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox if (id_ns->ncap == 0) 1813b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1814b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1815bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_get_features(dev, NVME_FEAT_LBA_RANGE, i, 181608df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr + 4096, NULL); 1817b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1818122090366d1d5c6ec1bfb6dfdb3a6d121ff074aaKeith Busch memset(mem + 4096, 0, 4096); 1819b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1820bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ns = nvme_alloc_ns(dev, i, mem, mem + 4096); 1821b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (ns) 1822b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_add_tail(&ns->list, &dev->namespaces); 1823b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1824b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry(ns, &dev->namespaces, list) 1825b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox add_disk(ns->disk); 1826422ef0c7c81934c3344e1623d2dcfda5fa2fab8dMatthew Wilcox res = 0; 1827b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1828bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox out: 1829684f5c2025b067a23722e620d0b3b858d8dc5d01Matthew Wilcox dma_free_coherent(&dev->pci_dev->dev, 8192, mem, dma_addr); 1830b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 1831b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1832b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1833b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_dev_remove(struct nvme_dev *dev) 1834b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1835b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns, *next; 1836b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 18371fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 18381fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_del(&dev->node); 18391fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 18401fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 1841b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 1842b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_del(&ns->list); 1843b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox del_gendisk(ns->disk); 1844b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_ns_free(ns); 1845b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1846b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1847b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queues(dev); 1848b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1849b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1850b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1851b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1852091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic int nvme_setup_prp_pools(struct nvme_dev *dev) 1853091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 1854091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 1855091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dev->prp_page_pool = dma_pool_create("prp list page", dmadev, 1856091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox PAGE_SIZE, PAGE_SIZE, 0); 1857091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (!dev->prp_page_pool) 1858091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return -ENOMEM; 1859091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 186099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox /* Optimisation for I/Os between 4k and 128k */ 186199802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dev->prp_small_pool = dma_pool_create("prp list 256", dmadev, 186299802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 256, 256, 0); 186399802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (!dev->prp_small_pool) { 186499802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 186599802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox return -ENOMEM; 186699802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 1867091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return 0; 1868091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 1869091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1870091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic void nvme_release_prp_pools(struct nvme_dev *dev) 1871091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 1872091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 187399802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_small_pool); 1874091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 1875091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1876cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic DEFINE_IDA(nvme_instance_ida); 1877cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1878cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic int nvme_set_instance(struct nvme_dev *dev) 1879b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1880cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh int instance, error; 1881cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1882cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh do { 1883cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (!ida_pre_get(&nvme_instance_ida, GFP_KERNEL)) 1884cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 1885cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1886cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 1887cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh error = ida_get_new(&nvme_instance_ida, &instance); 1888cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 1889cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh } while (error == -EAGAIN); 1890cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1891cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (error) 1892cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 1893cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1894cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh dev->instance = instance; 1895cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return 0; 1896b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1897b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1898b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_release_instance(struct nvme_dev *dev) 1899b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1900cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 1901cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh ida_remove(&nvme_instance_ida, dev->instance); 1902cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 1903b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1904b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 19055e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic void nvme_free_dev(struct kref *kref) 19065e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 19075e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = container_of(kref, struct nvme_dev, kref); 19085e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_dev_remove(dev); 1909fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula if (dev->pci_dev->msi_enabled) 1910fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula pci_disable_msi(dev->pci_dev); 1911fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula else if (dev->pci_dev->msix_enabled) 1912fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula pci_disable_msix(dev->pci_dev); 19135e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch iounmap(dev->bar); 19145e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_release_instance(dev); 19155e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_release_prp_pools(dev); 19165e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch pci_disable_device(dev->pci_dev); 19175e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch pci_release_regions(dev->pci_dev); 19185e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev->queues); 19195e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev->entry); 19205e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kfree(dev); 19215e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 19225e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 19235e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic int nvme_dev_open(struct inode *inode, struct file *f) 19245e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 19255e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = container_of(f->private_data, struct nvme_dev, 19265e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch miscdev); 19275e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_get(&dev->kref); 19285e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch f->private_data = dev; 19295e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return 0; 19305e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 19315e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 19325e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic int nvme_dev_release(struct inode *inode, struct file *f) 19335e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 19345e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = f->private_data; 19355e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_put(&dev->kref, nvme_free_dev); 19365e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return 0; 19375e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 19385e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 19395e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic long nvme_dev_ioctl(struct file *f, unsigned int cmd, unsigned long arg) 19405e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch{ 19415e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch struct nvme_dev *dev = f->private_data; 19425e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch switch (cmd) { 19435e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch case NVME_IOCTL_ADMIN_CMD: 19445e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return nvme_user_admin_cmd(dev, (void __user *)arg); 19455e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch default: 19465e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch return -ENOTTY; 19475e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch } 19485e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch} 19495e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 19505e82e952f04681c10f35e02ee0a4a43ec027137aKeith Buschstatic const struct file_operations nvme_dev_fops = { 19515e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .owner = THIS_MODULE, 19525e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .open = nvme_dev_open, 19535e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .release = nvme_dev_release, 19545e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .unlocked_ioctl = nvme_dev_ioctl, 19555e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch .compat_ioctl = nvme_dev_ioctl, 19565e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch}; 19575e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 19588d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) 1959b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1960574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox int bars, result = -ENOMEM; 1961b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev; 1962b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1963b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev = kzalloc(sizeof(*dev), GFP_KERNEL); 1964b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev) 1965b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOMEM; 1966b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->entry = kcalloc(num_possible_cpus(), sizeof(*dev->entry), 1967b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 1968b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->entry) 1969b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 19701b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queues = kcalloc(num_possible_cpus() + 1, sizeof(void *), 19711b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox GFP_KERNEL); 1972b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->queues) 1973b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 1974b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 19750ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews if (pci_enable_device_mem(pdev)) 19760ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews goto free; 1977f64d3365a3e5cb46e69db7e2c82a7cb9a5bed1b8Matthew Wilcox pci_set_master(pdev); 1978574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox bars = pci_select_bars(pdev, IORESOURCE_MEM); 1979574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox if (pci_request_selected_regions(pdev, bars, "nvme")) 1980574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox goto disable; 19810ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews 1982b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox INIT_LIST_HEAD(&dev->namespaces); 1983b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->pci_dev = pdev; 1984b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_set_drvdata(pdev, dev); 1985cf9f123b38345b2c2777e642eb9bb561f4b7de91Matthew Wilcox 1986cf9f123b38345b2c2777e642eb9bb561f4b7de91Matthew Wilcox if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) 1987cf9f123b38345b2c2777e642eb9bb561f4b7de91Matthew Wilcox dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); 1988cf9f123b38345b2c2777e642eb9bb561f4b7de91Matthew Wilcox else if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) 1989cf9f123b38345b2c2777e642eb9bb561f4b7de91Matthew Wilcox dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); 1990cf9f123b38345b2c2777e642eb9bb561f4b7de91Matthew Wilcox else 1991cf9f123b38345b2c2777e642eb9bb561f4b7de91Matthew Wilcox goto disable; 1992cf9f123b38345b2c2777e642eb9bb561f4b7de91Matthew Wilcox 1993cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh result = nvme_set_instance(dev); 1994cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (result) 1995cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh goto disable; 1996cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 199753c9577e9ca68a633c6e9df2b54eaecacfa77f62Matthew Wilcox dev->entry[0].vector = pdev->irq; 1998b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1999091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox result = nvme_setup_prp_pools(dev); 2000091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (result) 2001091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox goto disable_msix; 2002091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 2003b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); 2004b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->bar) { 2005b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = -ENOMEM; 2006574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox goto disable_msix; 2007b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 2008b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2009b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = nvme_configure_admin_queue(dev); 2010b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 2011b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto unmap; 2012b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->queue_count++; 2013b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 20141fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 20151fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_add(&dev->node, &dev_list); 20161fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 20171fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 2018740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox result = nvme_dev_add(dev); 2019740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (result) 2020740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox goto delete; 2021740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 20225e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch scnprintf(dev->name, sizeof(dev->name), "nvme%d", dev->instance); 20235e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.minor = MISC_DYNAMIC_MINOR; 20245e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.parent = &pdev->dev; 20255e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.name = dev->name; 20265e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch dev->miscdev.fops = &nvme_dev_fops; 20275e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch result = misc_register(&dev->miscdev); 20285e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch if (result) 20295e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch goto remove; 20305e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch 20315e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_init(&dev->kref); 2032b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 2033b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 20345e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch remove: 20355e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch nvme_dev_remove(dev); 2036b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox delete: 2037740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox spin_lock(&dev_list_lock); 2038740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox list_del(&dev->node); 2039740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox spin_unlock(&dev_list_lock); 2040740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 2041b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queues(dev); 2042b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unmap: 2043b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox iounmap(dev->bar); 2044574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox disable_msix: 2045fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula if (dev->pci_dev->msi_enabled) 2046fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula pci_disable_msi(dev->pci_dev); 2047fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula else if (dev->pci_dev->msix_enabled) 2048fa08a396647767abd24a9e7015cb177121d0cf15Ramachandra Rao Gajula pci_disable_msix(dev->pci_dev); 2049b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_release_instance(dev); 2050091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvme_release_prp_pools(dev); 2051574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox disable: 20520ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews pci_disable_device(pdev); 2053574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox pci_release_regions(pdev); 2054b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free: 2055b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->queues); 2056b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->entry); 2057b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev); 2058b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 2059b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2060b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 20618d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic void nvme_remove(struct pci_dev *pdev) 2062b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2063b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev = pci_get_drvdata(pdev); 20645e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch misc_deregister(&dev->miscdev); 20655e82e952f04681c10f35e02ee0a4a43ec027137aKeith Busch kref_put(&dev->kref, nvme_free_dev); 2066b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2067b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2068b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* These functions are yet to be implemented */ 2069b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_detected NULL 2070b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_dump_registers NULL 2071b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_link_reset NULL 2072b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_slot_reset NULL 2073b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_resume NULL 2074b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_suspend NULL 2075b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_resume NULL 2076b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 20771d3520357df99baf4ad89f86268ac96cd38092d9Stephen Hemmingerstatic const struct pci_error_handlers nvme_err_handler = { 2078b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .error_detected = nvme_error_detected, 2079b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .mmio_enabled = nvme_dump_registers, 2080b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .link_reset = nvme_link_reset, 2081b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .slot_reset = nvme_slot_reset, 2082b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_error_resume, 2083b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2084b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2085b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* Move to pci_ids.h later */ 2086b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define PCI_CLASS_STORAGE_EXPRESS 0x010802 2087b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2088b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic DEFINE_PCI_DEVICE_TABLE(nvme_id_table) = { 2089b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, 2090b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { 0, } 2091b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2092b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_DEVICE_TABLE(pci, nvme_id_table); 2093b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2094b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct pci_driver nvme_driver = { 2095b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .name = "nvme", 2096b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .id_table = nvme_id_table, 2097b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .probe = nvme_probe, 20988d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartman .remove = nvme_remove, 2099b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .suspend = nvme_suspend, 2100b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_resume, 2101b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .err_handler = &nvme_err_handler, 2102b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 2103b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2104b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __init nvme_init(void) 2105b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 21060ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox int result; 21071fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 21081fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); 21091fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (IS_ERR(nvme_thread)) 21101fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return PTR_ERR(nvme_thread); 2111b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 21125c42ea1643a630060f9e71e06d3933d244970967Keith Busch result = register_blkdev(nvme_major, "nvme"); 21135c42ea1643a630060f9e71e06d3933d244970967Keith Busch if (result < 0) 21141fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto kill_kthread; 21155c42ea1643a630060f9e71e06d3933d244970967Keith Busch else if (result > 0) 21160ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox nvme_major = result; 2117b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2118b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = pci_register_driver(&nvme_driver); 21191fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (result) 21201fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto unregister_blkdev; 21211fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 2122b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 21231fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox unregister_blkdev: 2124b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 21251fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kill_kthread: 21261fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 2127b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 2128b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2129b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2130b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void __exit nvme_exit(void) 2131b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2132b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_unregister_driver(&nvme_driver); 2133b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 21341fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 2135b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 2136b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 2137b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); 2138b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_LICENSE("GPL"); 2139366e8217e5ec6ce9f73aec19c46d983110fb4a98Matthew WilcoxMODULE_VERSION("0.8"); 2140b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_init(nvme_init); 2141b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_exit(nvme_exit); 2142