nvme-core.c revision f8ebf8409abfdaeeb8c847381629a2a8b8e3d816
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> 42b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 43797a796a13df6b84a4791e57306737059b5b2384Hitoshi Mitake#include <asm-generic/io-64-nonatomic-lo-hi.h> 44797a796a13df6b84a4791e57306737059b5b2384Hitoshi Mitake 45b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define NVME_Q_DEPTH 1024 46b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define SQ_SIZE(depth) (depth * sizeof(struct nvme_command)) 47b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion)) 48b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define NVME_MINORS 64 49e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox#define ADMIN_TIMEOUT (60 * HZ) 50b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 51b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_major; 52b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_param(nvme_major, int, 0); 53b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 5458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic int use_threaded_interrupts; 5558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxmodule_param(use_threaded_interrupts, int, 0); 5658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 571fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic DEFINE_SPINLOCK(dev_list_lock); 581fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic LIST_HEAD(dev_list); 591fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic struct task_struct *nvme_thread; 601fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 61b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 62b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * An NVM Express queue. Each device has at least two (one for admin 63b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * commands and one for I/O commands). 64b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 65b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstruct nvme_queue { 66b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *q_dmadev; 67091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct nvme_dev *dev; 68b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spinlock_t q_lock; 69b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command *sq_cmds; 70b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox volatile struct nvme_completion *cqes; 71b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t sq_dma_addr; 72b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t cq_dma_addr; 73b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wait_queue_head_t sq_full; 741fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox wait_queue_t sq_cong_wait; 75b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio_list sq_cong; 76b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 __iomem *q_db; 77b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 q_depth; 78b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 cq_vector; 79b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 sq_head; 80b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 sq_tail; 81b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 cq_head; 82821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox u16 cq_phase; 83b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long cmdid_data[]; 84b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 85b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 86b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 87b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Check we didin't inadvertently grow the command struct 88b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 89b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic inline void _nvme_check_size(void) 90b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 91b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); 92b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); 93b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); 94b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); 95b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_features) != 64); 96f8ebf8409abfdaeeb8c847381629a2a8b8e3d816Vishal Verma BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64); 97b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_command) != 64); 98b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096); 99b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096); 100b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); 1016ecec74520d8a357726e6c12f99080dbe7b347ddKeith Busch BUILD_BUG_ON(sizeof(struct nvme_smart_log) != 512); 102b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 103b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1045c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxtypedef void (*nvme_completion_fn)(struct nvme_dev *, void *, 105c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *); 106c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 107e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstruct nvme_cmd_info { 108c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 109c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 110e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox unsigned long timeout; 111e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox}; 112e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 113e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstatic struct nvme_cmd_info *nvme_cmd_info(struct nvme_queue *nvmeq) 114e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox{ 115e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return (void *)&nvmeq->cmdid_data[BITS_TO_LONGS(nvmeq->q_depth)]; 116e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox} 117e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 118b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 119714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * alloc_cmdid() - Allocate a Command ID 120714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @nvmeq: The queue that will be used for this command 121714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @ctx: A pointer that will be passed to the handler 122c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox * @handler: The function to call on completion 123b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 124b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Allocate a Command ID for a queue. The data passed in will 125b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * be passed to the completion handler. This is implemented by using 126b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the bottom two bits of the ctx pointer to store the handler ID. 127b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Passing in a pointer that's not 4-byte aligned will cause a BUG. 128b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * We can change this if it becomes a problem. 129184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * 130184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * May be called with local interrupts disabled and the q_lock held, 131184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * or with interrupts enabled and no locks held. 132b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 133c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic int alloc_cmdid(struct nvme_queue *nvmeq, void *ctx, 134c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 135b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 136e6d15f79f997a98b3a69abbc462fc9041cc1a7b4Matthew Wilcox int depth = nvmeq->q_depth - 1; 137e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 138b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 139b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 140b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox do { 141b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdid = find_first_zero_bit(nvmeq->cmdid_data, depth); 142b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid >= depth) 143b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EBUSY; 144b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } while (test_and_set_bit(cmdid, nvmeq->cmdid_data)); 145b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 146c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = handler; 147c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].ctx = ctx; 148e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].timeout = jiffies + timeout; 149b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 150b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 151b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 152b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int alloc_cmdid_killable(struct nvme_queue *nvmeq, void *ctx, 153c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 154b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 155b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 156b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wait_event_killable(nvmeq->sq_full, 157e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox (cmdid = alloc_cmdid(nvmeq, ctx, handler, timeout)) >= 0); 158b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return (cmdid < 0) ? -EINTR : cmdid; 159b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 160b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 161c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox/* Special values must be less than 0x1000 */ 162c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox#define CMD_CTX_BASE ((void *)POISON_POINTER_DELTA) 163d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_CANCELLED (0x30C + CMD_CTX_BASE) 164d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_COMPLETED (0x310 + CMD_CTX_BASE) 165d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_INVALID (0x314 + CMD_CTX_BASE) 16600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox#define CMD_CTX_FLUSH (0x318 + CMD_CTX_BASE) 167be7b62754e097adc0cb16c25c9ee86ee20de62fbMatthew Wilcox 1685c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void special_completion(struct nvme_dev *dev, void *ctx, 169c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 170c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 171c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_CANCELLED) 172c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 173c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_FLUSH) 174c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 175c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_COMPLETED) { 1765c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, 177c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "completed id %d twice on queue %d\n", 178c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 179c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 180c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 181c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_INVALID) { 1825c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, 183c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "invalid id %d completed on queue %d\n", 184c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 185c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 186c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 187c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 1885c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, "Unknown special completion %p\n", ctx); 189c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 190c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 191184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 192184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 193184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 194c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *free_cmdid(struct nvme_queue *nvmeq, int cmdid, 195c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 196b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 197c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 198e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 199b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 200c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (cmdid >= nvmeq->q_depth) { 201c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = special_completion; 20248e3d39816416b3bf03dee3a796c0c04427c1a31Matthew Wilcox return CMD_CTX_INVALID; 203c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 204859361a228258edf4821d9f5635825033eca78e8Keith Busch if (fn) 205859361a228258edf4821d9f5635825033eca78e8Keith Busch *fn = info[cmdid].fn; 206c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 207c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 208e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_COMPLETED; 209b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox clear_bit(cmdid, nvmeq->cmdid_data); 210b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wake_up(&nvmeq->sq_full); 211c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 212b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 213b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 214c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *cancel_cmdid(struct nvme_queue *nvmeq, int cmdid, 215c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 2163c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 217c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 218e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 219c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (fn) 220c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = info[cmdid].fn; 221c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 222c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 223e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_CANCELLED; 224c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 2253c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 2263c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 227040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcoxstatic struct nvme_queue *get_nvmeq(struct nvme_dev *dev) 228b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 229040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox return dev->queues[get_cpu() + 1]; 230b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 231b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 232b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void put_nvmeq(struct nvme_queue *nvmeq) 233b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2341b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox put_cpu(); 235b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 236b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 237b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 238714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * nvme_submit_cmd() - Copy a command into a queue and ring the doorbell 239b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @nvmeq: The queue to use 240b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @cmd: The command to send 241b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 242b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Safe to use from interrupt context 243b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 244b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd) 245b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 246b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long flags; 247b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 tail; 248b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_irqsave(&nvmeq->q_lock, flags); 249b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = nvmeq->sq_tail; 250b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); 251b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++tail == nvmeq->q_depth) 252b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = 0; 2537547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(tail, nvmeq->q_db); 254b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = tail; 255b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_unlock_irqrestore(&nvmeq->q_lock, flags); 256b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 257b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 258b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 259b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 260eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic __le64 **iod_list(struct nvme_iod *iod) 261e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews{ 262eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ((void *)iod) + iod->offset; 263e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews} 264e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 265eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox/* 266eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * Will slightly overestimate the number of pages needed. This is OK 267eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * as it only leads to a small amount of wasted memory for the lifetime of 268eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * the I/O. 269eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox */ 270eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic int nvme_npages(unsigned size) 271eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox{ 272eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned nprps = DIV_ROUND_UP(size + PAGE_SIZE, PAGE_SIZE); 273eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); 274eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox} 275b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 276eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic struct nvme_iod * 277eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxnvme_alloc_iod(unsigned nseg, unsigned nbytes, gfp_t gfp) 278b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 279eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = kmalloc(sizeof(struct nvme_iod) + 280eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(__le64 *) * nvme_npages(nbytes) + 281eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(struct scatterlist) * nseg, gfp); 282eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 283eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod) { 284eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->offset = offsetof(struct nvme_iod, sg[nseg]); 285eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 286eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->length = nbytes; 2872b1960341576bf51c01b12fefeb1cc53820923e7Keith Busch iod->nents = 0; 288eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 289eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 290eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 291b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 292b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 293eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod) 294b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 295eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox const int last_prp = PAGE_SIZE / 8 - 1; 296eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int i; 297eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 298eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t prp_dma = iod->first_dma; 299eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 300eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod->npages == 0) 301eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_small_pool, list[0], prp_dma); 302eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox for (i = 0; i < iod->npages; i++) { 303eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 *prp_list = list[i]; 304eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t next_prp_dma = le64_to_cpu(prp_list[last_prp]); 305eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); 306eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox prp_dma = next_prp_dma; 307eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 308eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 309b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 310b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3115c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void requeue_bio(struct nvme_dev *dev, struct bio *bio) 3125c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox{ 3135c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox struct nvme_queue *nvmeq = get_nvmeq(dev); 3145c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 3155c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 3165c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox bio_list_add(&nvmeq->sq_cong, bio); 3175c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox put_nvmeq(nvmeq); 3185c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox wake_up_process(nvme_thread); 3195c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox} 3205c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox 3215c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void bio_completion(struct nvme_dev *dev, void *ctx, 322b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion *cqe) 323b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 324eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = ctx; 325eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct bio *bio = iod->private; 326b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 status = le16_to_cpup(&cqe->status) >> 1; 327b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3282b1960341576bf51c01b12fefeb1cc53820923e7Keith Busch if (iod->nents) 3292b1960341576bf51c01b12fefeb1cc53820923e7Keith Busch dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 330b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_data_dir(bio) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 331eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 33209a58f536436efed02ead722e835cb4ce7674afcMatthew Wilcox if (status) { 3331ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, -EIO); 33409a58f536436efed02ead722e835cb4ce7674afcMatthew Wilcox } else if (bio->bi_vcnt > bio->bi_idx) { 3355c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox requeue_bio(dev, bio); 3361ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox } else { 3371ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, 0); 3381ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox } 339b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 340b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 341184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* length is in bytes. gfp flags indicates whether we may sleep. */ 342eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic int nvme_setup_prps(struct nvme_dev *dev, 343eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_common_command *cmd, struct nvme_iod *iod, 344eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int total_len, gfp_t gfp) 345ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox{ 34699802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox struct dma_pool *pool; 347eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int length = total_len; 348eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct scatterlist *sg = iod->sg; 349ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int dma_len = sg_dma_len(sg); 350ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox u64 dma_addr = sg_dma_address(sg); 351ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int offset = offset_in_page(dma_addr); 352e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *prp_list; 353eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 354e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr_t prp_dma; 355eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int nprps, i; 356ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 357ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmd->prp1 = cpu_to_le64(dma_addr); 358ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox length -= (PAGE_SIZE - offset); 359ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= 0) 360eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 361ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 362ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len -= (PAGE_SIZE - offset); 363ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (dma_len) { 364ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr += (PAGE_SIZE - offset); 365ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } else { 366ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox sg = sg_next(sg); 367ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr = sg_dma_address(sg); 368ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len = sg_dma_len(sg); 369ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 370ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 371ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= PAGE_SIZE) { 372ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmd->prp2 = cpu_to_le64(dma_addr); 373eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 374e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 375e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 376e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews nprps = DIV_ROUND_UP(length, PAGE_SIZE); 37799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (nprps <= (256 / 8)) { 37899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_small_pool; 379eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 0; 38099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } else { 38199802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_page_pool; 382eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 1; 38399802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 38499802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 385b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 386b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (!prp_list) { 387b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox cmd->prp2 = cpu_to_le64(dma_addr); 388eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 389eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return (total_len - length) + PAGE_SIZE; 390b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox } 391eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[0] = prp_list; 392eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->first_dma = prp_dma; 393e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews cmd->prp2 = cpu_to_le64(prp_dma); 394e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews i = 0; 395e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews for (;;) { 3967523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox if (i == PAGE_SIZE / 8) { 397e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *old_prp_list = prp_list; 398b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 399eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!prp_list) 400eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len - length; 401eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[iod->npages++] = prp_list; 4027523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox prp_list[0] = old_prp_list[i - 1]; 4037523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox old_prp_list[i - 1] = cpu_to_le64(prp_dma); 4047523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox i = 1; 405e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 406e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews prp_list[i++] = cpu_to_le64(dma_addr); 407e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len -= PAGE_SIZE; 408e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr += PAGE_SIZE; 409e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews length -= PAGE_SIZE; 410e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (length <= 0) 411e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews break; 412e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (dma_len > 0) 413e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews continue; 414e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews BUG_ON(dma_len < 0); 415e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews sg = sg_next(sg); 416e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr = sg_dma_address(sg); 417e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len = sg_dma_len(sg); 418ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 419ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 420eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 421ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox} 422ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 4231ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox/* NVMe scatterlists require no holes in the virtual address */ 4241ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox#define BIOVEC_NOT_VIRT_MERGEABLE(vec1, vec2) ((vec2)->bv_offset || \ 4251ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox (((vec1)->bv_offset + (vec1)->bv_len) % PAGE_SIZE)) 4261ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox 427eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic int nvme_map_bio(struct device *dev, struct nvme_iod *iod, 428b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio, enum dma_data_direction dma_dir, int psegs) 429b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 430768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox struct bio_vec *bvec, *bvprv = NULL; 431768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox struct scatterlist *sg = NULL; 4321ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox int i, old_idx, length = 0, nsegs = 0; 433b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 434eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg_init_table(iod->sg, psegs); 4351ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox old_idx = bio->bi_idx; 436b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_for_each_segment(bvec, bio, i) { 437768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox if (bvprv && BIOVEC_PHYS_MERGEABLE(bvprv, bvec)) { 438768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg->length += bvec->bv_len; 439768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } else { 4401ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox if (bvprv && BIOVEC_NOT_VIRT_MERGEABLE(bvprv, bvec)) 4411ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox break; 442eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = sg ? sg + 1 : iod->sg; 443768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_set_page(sg, bvec->bv_page, bvec->bv_len, 444768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvec->bv_offset); 445768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox nsegs++; 446768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } 4471ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox length += bvec->bv_len; 448768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvprv = bvec; 449b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 4501ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio->bi_idx = i; 451eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->nents = nsegs; 452768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_mark_end(sg); 453eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (dma_map_sg(dev, iod->sg, iod->nents, dma_dir) == 0) { 4541ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio->bi_idx = old_idx; 4551ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return -ENOMEM; 4561ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox } 4571ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return length; 458b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 459b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 4600e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch/* 4610e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * We reuse the small pool to allocate the 16-byte range here as it is not 4620e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * worth having a special pool for these or additional cases to handle freeing 4630e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch * the iod. 4640e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch */ 4650e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic int nvme_submit_discard(struct nvme_queue *nvmeq, struct nvme_ns *ns, 4660e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct bio *bio, struct nvme_iod *iod, int cmdid) 4670e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 4680e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct nvme_dsm_range *range; 4690e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 4700e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 4710e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range = dma_pool_alloc(nvmeq->dev->prp_small_pool, GFP_ATOMIC, 4720e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch &iod->first_dma); 4730e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (!range) 4740e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return -ENOMEM; 4750e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 4760e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch iod_list(iod)[0] = (__le64 *)range; 4770e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch iod->npages = 0; 4780e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 4790e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range->cattr = cpu_to_le32(0); 4800e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range->nlb = cpu_to_le32(bio->bi_size >> ns->lba_shift); 4810e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch range->slba = cpu_to_le64(bio->bi_sector >> (ns->lba_shift - 9)); 4820e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 4830e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch memset(cmnd, 0, sizeof(*cmnd)); 4840e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.opcode = nvme_cmd_dsm; 4850e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.command_id = cmdid; 4860e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nsid = cpu_to_le32(ns->ns_id); 4870e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.prp1 = cpu_to_le64(iod->first_dma); 4880e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.nr = 0; 4890e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch cmnd->dsm.attributes = cpu_to_le32(NVME_DSMGMT_AD); 4900e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 4910e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (++nvmeq->sq_tail == nvmeq->q_depth) 4920e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvmeq->sq_tail = 0; 4930e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch writel(nvmeq->sq_tail, nvmeq->q_db); 4940e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 4950e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return 0; 4960e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 4970e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 49800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcoxstatic int nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns, 49900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid) 50000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 50100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 50200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 50300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 50400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.opcode = nvme_cmd_flush; 50500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.command_id = cmdid; 50600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.nsid = cpu_to_le32(ns->ns_id); 50700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 50800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 50900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox nvmeq->sq_tail = 0; 51000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 51100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 51200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return 0; 51300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 51400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 51500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcoxstatic int nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns) 51600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 51700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid = alloc_cmdid(nvmeq, (void *)CMD_CTX_FLUSH, 518ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox special_completion, NVME_IO_TIMEOUT); 51900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (unlikely(cmdid < 0)) 52000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return cmdid; 52100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 52200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 52300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 52400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 525184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 526184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 527184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 528b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns, 529b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio) 530b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 531ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox struct nvme_command *cmnd; 532eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 533b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox enum dma_data_direction dma_dir; 5341ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox int cmdid, length, result = -ENOMEM; 535b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 control; 536b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 dsmgmt; 537b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int psegs = bio_phys_segments(ns->queue, bio); 538b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 53900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && psegs) { 54000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox result = nvme_submit_flush_data(nvmeq, ns); 54100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (result) 54200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return result; 54300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox } 54400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 545eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(psegs, bio->bi_size, GFP_ATOMIC); 546eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!iod) 547eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox goto nomem; 548eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->private = bio; 549b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 550eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox result = -EBUSY; 551ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox cmdid = alloc_cmdid(nvmeq, iod, bio_completion, NVME_IO_TIMEOUT); 552b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (unlikely(cmdid < 0)) 553eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 554b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 5550e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (bio->bi_rw & REQ_DISCARD) { 5560e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch result = nvme_submit_discard(nvmeq, ns, bio, iod, cmdid); 5570e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (result) 5580e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch goto free_cmdid; 5590e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch return result; 5600e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch } 56100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && !psegs) 56200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 56300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 564b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control = 0; 565b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_FUA) 566b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_FUA; 567b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & (REQ_FAILFAST_DEV | REQ_RAHEAD)) 568b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_LR; 569b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 570b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt = 0; 571b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_RAHEAD) 572b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; 573b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 574ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 575b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 576b8deb62cf271fa9381edc8cf52bcae2f0225c55aMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 577b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio_data_dir(bio)) { 578ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_write; 579b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_TO_DEVICE; 580b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } else { 581ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_read; 582b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_FROM_DEVICE; 583b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 584b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 585eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox result = nvme_map_bio(nvmeq->q_dmadev, iod, bio, dma_dir, psegs); 5861ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox if (result < 0) 587859361a228258edf4821d9f5635825033eca78e8Keith Busch goto free_cmdid; 5881ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox length = result; 589b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 590ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.command_id = cmdid; 591ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.nsid = cpu_to_le32(ns->ns_id); 592eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(nvmeq->dev, &cmnd->common, iod, length, 593eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_ATOMIC); 594ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.slba = cpu_to_le64(bio->bi_sector >> (ns->lba_shift - 9)); 5951ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox cmnd->rw.length = cpu_to_le16((length >> ns->lba_shift) - 1); 596ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.control = cpu_to_le16(control); 597ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); 598b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 599d8ee9d69f275769aaad40ef7c944565ff8d2d24fMatthew Wilcox bio->bi_sector += length >> 9; 600d8ee9d69f275769aaad40ef7c944565ff8d2d24fMatthew Wilcox 601b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 602b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = 0; 6037547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 604b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 6051974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox return 0; 6061974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox 607859361a228258edf4821d9f5635825033eca78e8Keith Busch free_cmdid: 608859361a228258edf4821d9f5635825033eca78e8Keith Busch free_cmdid(nvmeq, cmdid, NULL); 609eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 610eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(nvmeq->dev, iod); 611eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox nomem: 612eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox return result; 613b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 614b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 61593c3d65b28bab6da520c2add9cb387a0303f8b2dLinus Torvaldsstatic void nvme_make_request(struct request_queue *q, struct bio *bio) 616b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 617b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = q->queuedata; 618040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox struct nvme_queue *nvmeq = get_nvmeq(ns->dev); 619eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox int result = -EBUSY; 620eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox 621eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 622eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 623eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox result = nvme_submit_bio_queue(nvmeq, ns, bio); 624eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (unlikely(result)) { 625eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 626eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 627b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_add(&nvmeq->sq_cong, bio); 628b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 629eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox 630eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 631b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox put_nvmeq(nvmeq); 632b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 633b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 634b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_process_cq(struct nvme_queue *nvmeq) 635b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 636821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox u16 head, phase; 637b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 638b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = nvmeq->cq_head; 639821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = nvmeq->cq_phase; 640b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 641b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (;;) { 642c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 643c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 644b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion cqe = nvmeq->cqes[head]; 645821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != phase) 646b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox break; 647b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_head = le16_to_cpu(cqe.sq_head); 648b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++head == nvmeq->q_depth) { 649b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = 0; 650821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = !phase; 651b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 652b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 653c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = free_cmdid(nvmeq, cqe.command_id, &fn); 6545c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox fn(nvmeq->dev, ctx, &cqe); 655b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 656b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 657b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* If the controller ignores the cq head doorbell and continuously 658b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * writes to the queue, it is theoretically possible to wrap around 659b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the queue twice and mistakenly return IRQ_NONE. Linux only 660b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * requires that 0.1% of your interrupts are handled, so this isn't 661b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * a big problem. 662b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 663821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) 664b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return IRQ_NONE; 665b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 666f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox writel(head, nvmeq->q_db + (1 << nvmeq->dev->db_stride)); 667b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = head; 668821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = phase; 669b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 670b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return IRQ_HANDLED; 671b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 672b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 673b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_irq(int irq, void *data) 674b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 67558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox irqreturn_t result; 67658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 67758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_lock(&nvmeq->q_lock); 67858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox result = nvme_process_cq(nvmeq); 67958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_unlock(&nvmeq->q_lock); 68058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return result; 68158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 68258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 68358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic irqreturn_t nvme_irq_check(int irq, void *data) 68458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox{ 68558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 68658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; 68758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) 68858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_NONE; 68958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_WAKE_THREAD; 69058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 69158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 6923c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcoxstatic void nvme_abort_command(struct nvme_queue *nvmeq, int cmdid) 6933c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 6943c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 695c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cancel_cmdid(nvmeq, cmdid, NULL); 6963c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 6973c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 6983c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 699c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstruct sync_cmd_info { 700c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct task_struct *task; 701c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox u32 result; 702c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox int status; 703c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox}; 704c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 7055c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void sync_completion(struct nvme_dev *dev, void *ctx, 706c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 707c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 708c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct sync_cmd_info *cmdinfo = ctx; 709c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->result = le32_to_cpup(&cqe->result); 710c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; 711c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox wake_up_process(cmdinfo->task); 712c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 713c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 714b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 715b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Returns 0 on success. If the result is negative, it's a Linux error code; 716b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * if the result is positive, it's an NVM Express status code 717b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 7183c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcoxstatic int nvme_submit_sync_cmd(struct nvme_queue *nvmeq, 719e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_command *cmd, u32 *result, unsigned timeout) 720b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 721b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 722b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct sync_cmd_info cmdinfo; 723b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 724b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.task = current; 725b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.status = -EINTR; 726b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 727c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdid = alloc_cmdid_killable(nvmeq, &cmdinfo, sync_completion, 728e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox timeout); 729b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid < 0) 730b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 731b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmd->common.command_id = cmdid; 732b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7333c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox set_current_state(TASK_KILLABLE); 7343c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_submit_cmd(nvmeq, cmd); 735b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox schedule(); 736b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7373c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox if (cmdinfo.status == -EINTR) { 7383c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_abort_command(nvmeq, cmdid); 7393c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox return -EINTR; 7403c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox } 7413c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 742b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 743b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox *result = cmdinfo.result; 744b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 745b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdinfo.status; 746b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 747b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 748b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd, 749b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 *result) 750b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 751e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return nvme_submit_sync_cmd(dev->queues[0], cmd, result, ADMIN_TIMEOUT); 752b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 753b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 754b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) 755b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 756b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 757b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 758b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 759b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 760b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.opcode = opcode; 761b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.qid = cpu_to_le16(id); 762b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 763b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 764b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 765b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 766b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 767b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 768b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 769b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, 770b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 771b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 772b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 773b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 774b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; 775b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 776b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 777b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.opcode = nvme_admin_create_cq; 778b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); 779b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cqid = cpu_to_le16(qid); 780b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 781b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cq_flags = cpu_to_le16(flags); 782b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); 783b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 784b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 785b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 786b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 787b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 788b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 789b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 790b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, 791b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 792b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 793b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 794b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 795b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; 796b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 797b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 798b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.opcode = nvme_admin_create_sq; 799b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); 800b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sqid = cpu_to_le16(qid); 801b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 802b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sq_flags = cpu_to_le16(flags); 803b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.cqid = cpu_to_le16(qid); 804b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 805b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 806b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 807b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 808b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 809b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 810b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 811b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) 812b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 813b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); 814b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 815b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 816b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) 817b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 818b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); 819b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 820b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 821bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcoxstatic int nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns, 822bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox dma_addr_t dma_addr) 823bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 824bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 825bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 826bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 827bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.opcode = nvme_admin_identify; 828bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.nsid = cpu_to_le32(nsid); 829bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.prp1 = cpu_to_le64(dma_addr); 830bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.cns = cpu_to_le32(cns); 831bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 832bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, NULL); 833bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 834bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 83508df1e05657fc6712e520e7c09cc6c86160ceb35Keith Buschstatic int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid, 83608df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr_t dma_addr, u32 *result) 837bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 838bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 839bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 840bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 841bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.opcode = nvme_admin_get_features; 842a42ceccef0c43b46ff6bc1b12a7c1076ef243df1Keith Busch c.features.nsid = cpu_to_le32(nsid); 843bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 844bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.fid = cpu_to_le32(fid); 845bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 84608df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch return nvme_submit_admin_cmd(dev, &c, result); 847df3481399042200792822b6243e36a95a557b57eMatthew Wilcox} 848df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 849df3481399042200792822b6243e36a95a557b57eMatthew Wilcoxstatic int nvme_set_features(struct nvme_dev *dev, unsigned fid, 850df3481399042200792822b6243e36a95a557b57eMatthew Wilcox unsigned dword11, dma_addr_t dma_addr, u32 *result) 851df3481399042200792822b6243e36a95a557b57eMatthew Wilcox{ 852df3481399042200792822b6243e36a95a557b57eMatthew Wilcox struct nvme_command c; 853df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 854df3481399042200792822b6243e36a95a557b57eMatthew Wilcox memset(&c, 0, sizeof(c)); 855df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.opcode = nvme_admin_set_features; 856df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 857df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.fid = cpu_to_le32(fid); 858df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.dword11 = cpu_to_le32(dword11); 859df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 860bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, result); 861bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 862bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 863a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox/** 864a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * nvme_cancel_ios - Cancel outstanding I/Os 865a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @queue: The queue to cancel I/Os on 866a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox * @timeout: True to only cancel I/Os which have timed out 867a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox */ 868a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcoxstatic void nvme_cancel_ios(struct nvme_queue *nvmeq, bool timeout) 869a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox{ 870a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int depth = nvmeq->q_depth - 1; 871a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 872a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox unsigned long now = jiffies; 873a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox int cmdid; 874a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 875a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox for_each_set_bit(cmdid, nvmeq->cmdid_data, depth) { 876a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox void *ctx; 877a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_completion_fn fn; 878a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox static struct nvme_completion cqe = { 879a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox .status = cpu_to_le16(NVME_SC_ABORT_REQ) << 1, 880a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox }; 881a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 882a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox if (timeout && !time_after(now, info[cmdid].timeout)) 883a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox continue; 884a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox dev_warn(nvmeq->q_dmadev, "Cancelling I/O %d\n", cmdid); 885a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox ctx = cancel_cmdid(nvmeq, cmdid, &fn); 886a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox fn(nvmeq->dev, ctx, &cqe); 887a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox } 888a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox} 889a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 8909e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcoxstatic void nvme_free_queue_mem(struct nvme_queue *nvmeq) 8919e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox{ 8929e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 8939e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 8949e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 8959e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 8969e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox kfree(nvmeq); 8979e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox} 8989e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 899b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_free_queue(struct nvme_dev *dev, int qid) 900b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 901b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = dev->queues[qid]; 902aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox int vector = dev->entry[nvmeq->cq_vector].vector; 903b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 904a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 905a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_cancel_ios(nvmeq, false); 9063295874b6074d749516d6decd43afad7bf6e38ffKeith Busch while (bio_list_peek(&nvmeq->sq_cong)) { 9073295874b6074d749516d6decd43afad7bf6e38ffKeith Busch struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 9083295874b6074d749516d6decd43afad7bf6e38ffKeith Busch bio_endio(bio, -EIO); 9093295874b6074d749516d6decd43afad7bf6e38ffKeith Busch } 910a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 911a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox 912aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox irq_set_affinity_hint(vector, NULL); 913aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox free_irq(vector, nvmeq); 914b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 915b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* Don't tell the adapter to delete the admin queue */ 916b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (qid) { 917b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 918b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 919b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 920b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9219e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox nvme_free_queue_mem(nvmeq); 922b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 923b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 924b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, 925b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int depth, int vector) 926b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 927b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 928a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch unsigned extra = DIV_ROUND_UP(depth, 8) + (depth * 929a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch sizeof(struct nvme_cmd_info)); 930b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq) + extra, GFP_KERNEL); 931b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq) 932b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 933b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 934b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cqes = dma_alloc_coherent(dmadev, CQ_SIZE(depth), 935b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->cq_dma_addr, GFP_KERNEL); 936b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->cqes) 937b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 938b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset((void *)nvmeq->cqes, 0, CQ_SIZE(depth)); 939b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 940b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds = dma_alloc_coherent(dmadev, SQ_SIZE(depth), 941b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->sq_dma_addr, GFP_KERNEL); 942b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->sq_cmds) 943b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_cqdma; 944b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 945b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_dmadev = dmadev; 946091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvmeq->dev = dev; 947b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_init(&nvmeq->q_lock); 948b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = 0; 949821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = 1; 950b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox init_waitqueue_head(&nvmeq->sq_full); 9511fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox init_waitqueue_entry(&nvmeq->sq_cong_wait, nvme_thread); 952b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_init(&nvmeq->sq_cong); 953f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox nvmeq->q_db = &dev->dbs[qid << (dev->db_stride + 1)]; 954b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_depth = depth; 955b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_vector = vector; 956b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 957b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 958b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 959b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_cqdma: 960b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(dmadev, CQ_SIZE(nvmeq->q_depth), (void *)nvmeq->cqes, 961b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_dma_addr); 962b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 963b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 964b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 965b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 966b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9673001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcoxstatic int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, 9683001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox const char *name) 9693001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox{ 97058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if (use_threaded_interrupts) 97158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, 972ec6ce618d65b5ce1bef83a5509255107a0feac44Matthew Wilcox nvme_irq_check, nvme_irq, 97358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox IRQF_DISABLED | IRQF_SHARED, 97458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox name, nvmeq); 9753001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, 9763001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox IRQF_DISABLED | IRQF_SHARED, name, nvmeq); 9773001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox} 9783001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox 9798d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic struct nvme_queue *nvme_create_queue(struct nvme_dev *dev, int qid, 9808d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartman int cq_size, int vector) 981b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 982b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int result; 983b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = nvme_alloc_queue(dev, qid, cq_size, vector); 984b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9853f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox if (!nvmeq) 9866f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return ERR_PTR(-ENOMEM); 9873f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox 988b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_cq(dev, qid, nvmeq); 989b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 990b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 991b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 992b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_sq(dev, qid, nvmeq); 993b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 994b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_cq; 995b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9963001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme"); 997b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 998b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_sq; 999b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1000b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 1001b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1002b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_sq: 1003b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 1004b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_cq: 1005b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 1006b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 1007b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 1008b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 1009b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 1010b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 1011b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 10126f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return ERR_PTR(result); 1013b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1014b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10158d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_configure_admin_queue(struct nvme_dev *dev) 1016b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 10179e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox int result = 0; 1018b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 aqa; 101922605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox u64 cap; 102022605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox unsigned long timeout; 1021b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq; 1022b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1023b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 1024b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1025b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq = nvme_alloc_queue(dev, 0, 64, 0); 10263f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox if (!nvmeq) 10273f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox return -ENOMEM; 1028b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1029b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa = nvmeq->q_depth - 1; 1030b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa |= aqa << 16; 1031b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1032b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config = NVME_CC_ENABLE | NVME_CC_CSS_NVM; 1033b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= (PAGE_SHIFT - 12) << NVME_CC_MPS_SHIFT; 1034b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; 10357f53f9d2424533256ae86f7df5661a17de743de8Matthew Wilcox dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; 1036b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10375911f20039ce59d7e7834f0c42151cf759b6f786Shane Michael Matthews writel(0, &dev->bar->cc); 1038b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(aqa, &dev->bar->aqa); 1039b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->sq_dma_addr, &dev->bar->asq); 1040b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->cq_dma_addr, &dev->bar->acq); 1041b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(dev->ctrl_config, &dev->bar->cc); 1042b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 104322605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox cap = readq(&dev->bar->cap); 104422605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; 1045f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->db_stride = NVME_CAP_STRIDE(cap); 104622605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox 10479e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox while (!result && !(readl(&dev->bar->csts) & NVME_CSTS_RDY)) { 1048b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox msleep(100); 1049b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (fatal_signal_pending(current)) 10509e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox result = -EINTR; 105122605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox if (time_after(jiffies, timeout)) { 105222605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox dev_err(&dev->pci_dev->dev, 105322605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox "Device not ready; aborting initialisation\n"); 10549e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox result = -ENODEV; 105522605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox } 1056b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1057b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10589e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox if (result) { 10599e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox nvme_free_queue_mem(nvmeq); 10609e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox return result; 10619e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox } 10629e866774aab5d2654b0fa8f97890f68913f05700Matthew Wilcox 10633001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme admin"); 1064b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->queues[0] = nvmeq; 1065b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1066b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1067b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1068eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write, 1069eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned long addr, unsigned length) 1070b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 107136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox int i, err, count, nents, offset; 10727fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct scatterlist *sg; 10737fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct page **pages; 1074eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 107536c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 107636c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (addr & 3) 1077eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 10787fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox if (!length) 1079eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 10807fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 108136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox offset = offset_in_page(addr); 10827fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox count = DIV_ROUND_UP(offset + length, PAGE_SIZE); 10837fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox pages = kcalloc(count, sizeof(*pages), GFP_KERNEL); 108422fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter if (!pages) 108522fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter return ERR_PTR(-ENOMEM); 108636c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 108736c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = get_user_pages_fast(addr, count, 1, pages); 108836c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (err < count) { 108936c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox count = err; 109036c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = -EFAULT; 109136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox goto put_pages; 109236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox } 10937fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 1094eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(count, length, GFP_KERNEL); 1095eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = iod->sg; 109636c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox sg_init_table(sg, count); 1097d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox for (i = 0; i < count; i++) { 1098d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox sg_set_page(&sg[i], pages[i], 1099d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox min_t(int, length, PAGE_SIZE - offset), offset); 1100d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox length -= (PAGE_SIZE - offset); 1101d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox offset = 0; 11027fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox } 1103fe304c43c6d63e29ed4fc46a874d7a74313788c5Matthew Wilcox sg_mark_end(&sg[i - 1]); 11041c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox iod->nents = count; 11057fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 11067fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox err = -ENOMEM; 11077fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox nents = dma_map_sg(&dev->pci_dev->dev, sg, count, 11087fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 110936c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (!nents) 1110eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 1111b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 11127fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1113eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 1114b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1115eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 1116eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 11177fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_pages: 11187fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox for (i = 0; i < count; i++) 11197fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_page(pages[i]); 11207fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1121eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(err); 11227fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1123b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 11247fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcoxstatic void nvme_unmap_user_pages(struct nvme_dev *dev, int write, 11251c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox struct nvme_iod *iod) 11267fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox{ 11271c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox int i; 1128b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 11291c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 11301c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 11317fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 11321c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox for (i = 0; i < iod->nents; i++) 11331c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox put_page(sg_page(&iod->sg[i])); 11347fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1135b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1136a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcoxstatic int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) 1137a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox{ 1138a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_dev *dev = ns->dev; 1139a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_queue *nvmeq; 1140a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_user_io io; 1141a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_command c; 1142a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox unsigned length; 1143eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int status; 1144eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 1145a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1146a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox if (copy_from_user(&io, uio, sizeof(io))) 1147a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return -EFAULT; 11486c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox length = (io.nblocks + 1) << ns->lba_shift; 11496c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 11506c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox switch (io.opcode) { 11516c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_write: 11526c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_read: 11536bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case nvme_cmd_compare: 1154eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_map_user_pages(dev, io.opcode & 1, io.addr, length); 11556413214c5d424fd5aae6567848340f962ad2ce0fMatthew Wilcox break; 11566c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox default: 11576bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EINVAL; 11586c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox } 11596c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 1160eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1161eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1162a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1163a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox memset(&c, 0, sizeof(c)); 1164a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.opcode = io.opcode; 1165a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.flags = io.flags; 11666c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.nsid = cpu_to_le32(ns->ns_id); 1167a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.slba = cpu_to_le64(io.slba); 11686c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.length = cpu_to_le16(io.nblocks); 1169a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.control = cpu_to_le16(io.control); 1170a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.dsmgmt = cpu_to_le16(io.dsmgmt); 11716c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.reftag = io.reftag; 11726c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.apptag = io.apptag; 11736c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.appmask = io.appmask; 1174a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox /* XXX: metadata */ 1175eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, GFP_KERNEL); 1176a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1177040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox nvmeq = get_nvmeq(dev); 1178fa92282149842645931580225647238428374758Matthew Wilcox /* 1179fa92282149842645931580225647238428374758Matthew Wilcox * Since nvme_submit_sync_cmd sleeps, we can't keep preemption 1180b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * disabled. We may be preempted at any point, and be rescheduled 1181b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * to a different CPU. That will cause cacheline bouncing, but no 1182b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * additional races since q_lock already protects against other CPUs. 1183b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox */ 1184a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox put_nvmeq(nvmeq); 1185b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (length != (io.nblocks + 1) << ns->lba_shift) 1186b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1187b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 1188ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox status = nvme_submit_sync_cmd(nvmeq, &c, NULL, NVME_IO_TIMEOUT); 1189a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 11901c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, io.opcode & 1, iod); 1191eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 1192a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return status; 1193a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox} 1194a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 119550af8baec46a99a9b81a4600c0374f83a5a590a9Keith Buschstatic int nvme_user_admin_cmd(struct nvme_dev *dev, 11966bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd __user *ucmd) 11976ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox{ 11986bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd cmd; 11996ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox struct nvme_command c; 1200eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int status, length; 1201c7d36ab8fa04c213328119a9c0d66985fe204ee5Keith Busch struct nvme_iod *uninitialized_var(iod); 12026ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 12036bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (!capable(CAP_SYS_ADMIN)) 12046bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EACCES; 12056bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (copy_from_user(&cmd, ucmd, sizeof(cmd))) 12066ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return -EFAULT; 12076ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 12086ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox memset(&c, 0, sizeof(c)); 12096bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.opcode = cmd.opcode; 12106bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.flags = cmd.flags; 12116bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.nsid = cpu_to_le32(cmd.nsid); 12126bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); 12136bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); 12146bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); 12156bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); 12166bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); 12176bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); 12186bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); 12196bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); 12206bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 12216bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox length = cmd.data_len; 12226bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 1223497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox iod = nvme_map_user_pages(dev, cmd.opcode & 1, cmd.addr, 1224497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox length); 1225eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1226eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1227eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, 1228eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_KERNEL); 12296bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 12306bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 12316bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (length != cmd.data_len) 1232b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1233b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 1234f4f117f64baf8840d22266d518227b2a186d294bKeith Busch status = nvme_submit_admin_cmd(dev, &c, &cmd.result); 1235eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 12366bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 12371c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, cmd.opcode & 1, iod); 1238eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 12396bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 1240f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 1241f4f117f64baf8840d22266d518227b2a186d294bKeith Busch if (!status && copy_to_user(&ucmd->result, &cmd.result, 1242f4f117f64baf8840d22266d518227b2a186d294bKeith Busch sizeof(cmd.result))) 1243f4f117f64baf8840d22266d518227b2a186d294bKeith Busch status = -EFAULT; 1244f4f117f64baf8840d22266d518227b2a186d294bKeith Busch 12456ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return status; 12466ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox} 12476ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 1248b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, 1249b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long arg) 1250b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1251b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = bdev->bd_disk->private_data; 1252b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1253b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox switch (cmd) { 12546bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ID: 12556bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return ns->ns_id; 12566bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ADMIN_CMD: 125750af8baec46a99a9b81a4600c0374f83a5a590a9Keith Busch return nvme_user_admin_cmd(ns->dev, (void __user *)arg); 1258a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox case NVME_IOCTL_SUBMIT_IO: 1259a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return nvme_submit_io(ns, (void __user *)arg); 1260b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox default: 1261b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOTTY; 1262b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1263b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1264b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1265b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic const struct block_device_operations nvme_fops = { 1266b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .owner = THIS_MODULE, 1267b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .ioctl = nvme_ioctl, 12684948168280b269a514045766ddd872cfac5968e1Matthew Wilcox .compat_ioctl = nvme_ioctl, 1269b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1270b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12711fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic void nvme_resubmit_bios(struct nvme_queue *nvmeq) 12721fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 12731fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (bio_list_peek(&nvmeq->sq_cong)) { 12741fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 12751fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_ns *ns = bio->bi_bdev->bd_disk->private_data; 12761fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_submit_bio_queue(nvmeq, ns, bio)) { 12771fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox bio_list_add_head(&nvmeq->sq_cong, bio); 12781fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox break; 12791fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 12803cb967c03926edd2c414082f4cc0feb7b372edaeMatthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 12813cb967c03926edd2c414082f4cc0feb7b372edaeMatthew Wilcox remove_wait_queue(&nvmeq->sq_full, 12823cb967c03926edd2c414082f4cc0feb7b372edaeMatthew Wilcox &nvmeq->sq_cong_wait); 12831fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 12841fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 12851fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 12861fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic int nvme_kthread(void *data) 12871fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 12881fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_dev *dev; 12891fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 12901fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (!kthread_should_stop()) { 12911fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox __set_current_state(TASK_RUNNING); 12921fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 12931fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_for_each_entry(dev, &dev_list, node) { 12941fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox int i; 12951fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox for (i = 0; i < dev->queue_count; i++) { 12961fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_queue *nvmeq = dev->queues[i]; 1297740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (!nvmeq) 1298740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox continue; 12991fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 13001fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_process_cq(nvmeq)) 13011fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox printk("process_cq did something\n"); 1302a09115b23e2002bb35b7bfd337683f00875671ecMatthew Wilcox nvme_cancel_ios(nvmeq, true); 13031fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_resubmit_bios(nvmeq); 13041fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 13051fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 13061fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 13071fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 13081fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox set_current_state(TASK_INTERRUPTIBLE); 13091fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox schedule_timeout(HZ); 13101fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 13111fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 13121fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 13131fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 13145aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic DEFINE_IDA(nvme_index_ida); 13155aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 13165aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic int nvme_get_ns_idx(void) 13175aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox{ 13185aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox int index, error; 13195aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 13205aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox do { 13215aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox if (!ida_pre_get(&nvme_index_ida, GFP_KERNEL)) 13225aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox return -1; 13235aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 13245aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_lock(&dev_list_lock); 13255aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox error = ida_get_new(&nvme_index_ida, &index); 13265aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_unlock(&dev_list_lock); 13275aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox } while (error == -EAGAIN); 13285aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 13295aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox if (error) 13305aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox index = -1; 13315aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox return index; 13325aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox} 13335aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 13345aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic void nvme_put_ns_idx(int index) 13355aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox{ 13365aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_lock(&dev_list_lock); 13375aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ida_remove(&nvme_index_ida, index); 13385aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_unlock(&dev_list_lock); 13395aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox} 13405aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 13410e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Buschstatic void nvme_config_discard(struct nvme_ns *ns) 13420e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch{ 13430e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch u32 logical_block_size = queue_logical_block_size(ns->queue); 13440e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_zeroes_data = 0; 13450e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_alignment = logical_block_size; 13460e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.discard_granularity = logical_block_size; 13470e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch ns->queue->limits.max_discard_sectors = 0xffffffff; 13480e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); 13490e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch} 13500e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 13515aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, int nsid, 1352b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_id_ns *id, struct nvme_lba_range_type *rt) 1353b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1354b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns; 1355b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct gendisk *disk; 1356b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int lbaf; 1357b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1358b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (rt->attributes & NVME_LBART_ATTRIB_HIDE) 1359b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1360b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1361b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns = kzalloc(sizeof(*ns), GFP_KERNEL); 1362b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns) 1363b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1364b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue = blk_alloc_queue(GFP_KERNEL); 1365b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns->queue) 1366b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_ns; 13674eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox ns->queue->queue_flags = QUEUE_FLAG_DEFAULT; 13684eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue); 13694eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); 1370b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_queue_make_request(ns->queue, nvme_make_request); 1371b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->dev = dev; 1372b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue->queuedata = ns; 1373b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1374b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk = alloc_disk(NVME_MINORS); 1375b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!disk) 1376b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_queue; 13775aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ns->ns_id = nsid; 1378b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->disk = disk; 1379b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox lbaf = id->flbas & 0xf; 1380b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->lba_shift = id->lbaf[lbaf].ds; 1381e9ef46369f5107e634a93b7fc4e62a1f53343197Keith Busch blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); 13828fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch if (dev->max_hw_sectors) 13838fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors); 1384b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1385b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->major = nvme_major; 1386b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->minors = NVME_MINORS; 13875aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox disk->first_minor = NVME_MINORS * nvme_get_ns_idx(); 1388b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->fops = &nvme_fops; 1389b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->private_data = ns; 1390b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->queue = ns->queue; 1391388f037f4e7f0a24bac6b1a24f144f5d939f58cfMatthew Wilcox disk->driverfs_dev = &dev->pci_dev->dev; 13925aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox sprintf(disk->disk_name, "nvme%dn%d", dev->instance, nsid); 1393b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); 1394b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 13950e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch if (dev->oncs & NVME_CTRL_ONCS_DSM) 13960e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch nvme_config_discard(ns); 13970e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch 1398b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return ns; 1399b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1400b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_queue: 1401b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1402b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_ns: 1403b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1404b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1405b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1406b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1407b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_ns_free(struct nvme_ns *ns) 1408b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 14095aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox int index = ns->disk->first_minor / NVME_MINORS; 1410b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox put_disk(ns->disk); 14115aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox nvme_put_ns_idx(index); 1412b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1413b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1414b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1415b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1416b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcoxstatic int set_queue_count(struct nvme_dev *dev, int count) 1417b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1418b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 1419b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 result; 1420b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcox u32 q_count = (count - 1) | ((count - 1) << 16); 1421b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1422df3481399042200792822b6243e36a95a557b57eMatthew Wilcox status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0, 1423bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox &result); 1424b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 1425b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 1426b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return min(result & 0xffff, result >> 16) + 1; 1427b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1428b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14298d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_setup_io_queues(struct nvme_dev *dev) 1430b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1431a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch int result, cpu, i, nr_io_queues, db_bar_size, q_depth; 1432b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1433b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = num_online_cpus(); 1434b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox result = set_queue_count(dev, nr_io_queues); 14351b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox if (result < 0) 14361b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox return result; 1437b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox if (result < nr_io_queues) 1438b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = result; 1439b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14401b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox /* Deregister the admin queue's interrupt */ 14411b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox free_irq(dev->entry[0].vector, dev->queues[0]); 14421b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1443f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox db_bar_size = 4096 + ((nr_io_queues + 1) << (dev->db_stride + 3)); 1444f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox if (db_bar_size > 8192) { 1445f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox iounmap(dev->bar); 1446f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->bar = ioremap(pci_resource_start(dev->pci_dev, 0), 1447f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox db_bar_size); 1448f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 1449f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->queues[0]->q_db = dev->dbs; 1450f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox } 1451f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox 1452b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) 14531b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->entry[i].entry = i; 14541b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox for (;;) { 1455b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox result = pci_enable_msix(dev->pci_dev, dev->entry, 1456b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues); 14571b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox if (result == 0) { 14581b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox break; 14591b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } else if (result > 0) { 1460b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = result; 14611b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox continue; 14621b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } else { 1463b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = 1; 14641b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox break; 14651b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 14661b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 14671b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 14681b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox result = queue_request_irq(dev, dev->queues[0], "nvme admin"); 14691b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox /* XXX: handle failure here */ 14701b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 14711b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_first(cpu_online_mask); 1472b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) { 14731b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox irq_set_affinity_hint(dev->entry[i].vector, get_cpu_mask(cpu)); 14741b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_next(cpu, cpu_online_mask); 14751b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 14761b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1477a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch q_depth = min_t(int, NVME_CAP_MQES(readq(&dev->bar->cap)) + 1, 1478a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch NVME_Q_DEPTH); 1479b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) { 1480a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch dev->queues[i + 1] = nvme_create_queue(dev, i + 1, q_depth, i); 14816f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox if (IS_ERR(dev->queues[i + 1])) 14826f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return PTR_ERR(dev->queues[i + 1]); 14831b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queue_count++; 14841b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 1485b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14869ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox for (; i < num_possible_cpus(); i++) { 14879ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox int target = i % rounddown_pow_of_two(dev->queue_count - 1); 14889ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox dev->queues[i + 1] = dev->queues[target + 1]; 14899ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox } 14909ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox 1491b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1492b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1493b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1494b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_free_queues(struct nvme_dev *dev) 1495b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1496b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int i; 1497b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1498b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (i = dev->queue_count - 1; i >= 0; i--) 1499b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queue(dev, i); 1500b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1501b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 15028d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_dev_add(struct nvme_dev *dev) 1503b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1504b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int res, nn, i; 1505b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns, *next; 150651814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox struct nvme_id_ctrl *ctrl; 1507bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_id_ns *id_ns; 1508bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox void *mem; 1509b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t dma_addr; 1510b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1511b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = nvme_setup_io_queues(dev); 1512b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1513b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 1514b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1515bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox mem = dma_alloc_coherent(&dev->pci_dev->dev, 8192, &dma_addr, 1516b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 1517b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1518bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, 0, 1, dma_addr); 1519b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) { 1520b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = -EIO; 1521b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free; 1522b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1523b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1524bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ctrl = mem; 152551814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox nn = le32_to_cpup(&ctrl->nn); 15260e5e4f0e56aca0df1d5648db0be9028bd573b25cKeith Busch dev->oncs = le16_to_cpup(&ctrl->oncs); 152751814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn)); 152851814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn)); 152951814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr)); 15308fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch if (ctrl->mdts) { 15318fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12; 15328fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch dev->max_hw_sectors = 1 << (ctrl->mdts + shift - 9); 15338fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch } 1534b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1535bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox id_ns = mem; 15362b2c1896871838cdf549442e8ad0264be5fa74e3Matthew Wilcox for (i = 1; i <= nn; i++) { 1537bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, i, 0, dma_addr); 1538b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1539b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1540b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1541bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox if (id_ns->ncap == 0) 1542b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1543b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1544bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_get_features(dev, NVME_FEAT_LBA_RANGE, i, 154508df1e05657fc6712e520e7c09cc6c86160ceb35Keith Busch dma_addr + 4096, NULL); 1546b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1547122090366d1d5c6ec1bfb6dfdb3a6d121ff074aaKeith Busch memset(mem + 4096, 0, 4096); 1548b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1549bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ns = nvme_alloc_ns(dev, i, mem, mem + 4096); 1550b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (ns) 1551b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_add_tail(&ns->list, &dev->namespaces); 1552b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1553b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry(ns, &dev->namespaces, list) 1554b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox add_disk(ns->disk); 1555b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1556bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox goto out; 1557b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1558b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free: 1559b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 1560b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_del(&ns->list); 1561b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_ns_free(ns); 1562b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1563b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1564bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox out: 1565684f5c2025b067a23722e620d0b3b858d8dc5d01Matthew Wilcox dma_free_coherent(&dev->pci_dev->dev, 8192, mem, dma_addr); 1566b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 1567b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1568b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1569b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_dev_remove(struct nvme_dev *dev) 1570b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1571b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns, *next; 1572b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 15731fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 15741fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_del(&dev->node); 15751fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 15761fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 1577b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 1578b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_del(&ns->list); 1579b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox del_gendisk(ns->disk); 1580b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_ns_free(ns); 1581b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1582b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1583b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queues(dev); 1584b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1585b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1586b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1587b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1588091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic int nvme_setup_prp_pools(struct nvme_dev *dev) 1589091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 1590091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 1591091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dev->prp_page_pool = dma_pool_create("prp list page", dmadev, 1592091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox PAGE_SIZE, PAGE_SIZE, 0); 1593091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (!dev->prp_page_pool) 1594091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return -ENOMEM; 1595091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 159699802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox /* Optimisation for I/Os between 4k and 128k */ 159799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dev->prp_small_pool = dma_pool_create("prp list 256", dmadev, 159899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 256, 256, 0); 159999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (!dev->prp_small_pool) { 160099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 160199802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox return -ENOMEM; 160299802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 1603091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return 0; 1604091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 1605091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1606091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic void nvme_release_prp_pools(struct nvme_dev *dev) 1607091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 1608091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 160999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_small_pool); 1610091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 1611091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1612cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic DEFINE_IDA(nvme_instance_ida); 1613cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1614cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anhstatic int nvme_set_instance(struct nvme_dev *dev) 1615b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1616cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh int instance, error; 1617cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1618cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh do { 1619cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (!ida_pre_get(&nvme_instance_ida, GFP_KERNEL)) 1620cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 1621cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1622cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 1623cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh error = ida_get_new(&nvme_instance_ida, &instance); 1624cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 1625cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh } while (error == -EAGAIN); 1626cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1627cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (error) 1628cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return -ENODEV; 1629cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 1630cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh dev->instance = instance; 1631cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh return 0; 1632b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1633b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1634b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_release_instance(struct nvme_dev *dev) 1635b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1636cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_lock(&dev_list_lock); 1637cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh ida_remove(&nvme_instance_ida, dev->instance); 1638cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh spin_unlock(&dev_list_lock); 1639b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1640b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 16418d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic int nvme_probe(struct pci_dev *pdev, const struct pci_device_id *id) 1642b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1643574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox int bars, result = -ENOMEM; 1644b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev; 1645b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1646b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev = kzalloc(sizeof(*dev), GFP_KERNEL); 1647b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev) 1648b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOMEM; 1649b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->entry = kcalloc(num_possible_cpus(), sizeof(*dev->entry), 1650b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 1651b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->entry) 1652b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 16531b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queues = kcalloc(num_possible_cpus() + 1, sizeof(void *), 16541b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox GFP_KERNEL); 1655b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->queues) 1656b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 1657b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 16580ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews if (pci_enable_device_mem(pdev)) 16590ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews goto free; 1660f64d3365a3e5cb46e69db7e2c82a7cb9a5bed1b8Matthew Wilcox pci_set_master(pdev); 1661574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox bars = pci_select_bars(pdev, IORESOURCE_MEM); 1662574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox if (pci_request_selected_regions(pdev, bars, "nvme")) 1663574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox goto disable; 16640ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews 1665b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox INIT_LIST_HEAD(&dev->namespaces); 1666b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->pci_dev = pdev; 1667b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_set_drvdata(pdev, dev); 16682930353f9f2b9e4629e935acd970cb73c1171229Matthew Wilcox dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); 16692930353f9f2b9e4629e935acd970cb73c1171229Matthew Wilcox dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); 1670cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh result = nvme_set_instance(dev); 1671cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh if (result) 1672cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh goto disable; 1673cd58ad7d188c643cf572b038909c2f7dd96fdafeQuoc-Son Anh 167453c9577e9ca68a633c6e9df2b54eaecacfa77f62Matthew Wilcox dev->entry[0].vector = pdev->irq; 1675b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1676091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox result = nvme_setup_prp_pools(dev); 1677091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (result) 1678091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox goto disable_msix; 1679091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1680b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); 1681b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->bar) { 1682b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = -ENOMEM; 1683574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox goto disable_msix; 1684b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1685b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1686b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = nvme_configure_admin_queue(dev); 1687b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 1688b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto unmap; 1689b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->queue_count++; 1690b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 16911fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 16921fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_add(&dev->node, &dev_list); 16931fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 16941fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 1695740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox result = nvme_dev_add(dev); 1696740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (result) 1697740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox goto delete; 1698740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 1699b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1700b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1701b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox delete: 1702740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox spin_lock(&dev_list_lock); 1703740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox list_del(&dev->node); 1704740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox spin_unlock(&dev_list_lock); 1705740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 1706b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queues(dev); 1707b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unmap: 1708b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox iounmap(dev->bar); 1709574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox disable_msix: 1710b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_disable_msix(pdev); 1711b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_release_instance(dev); 1712091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvme_release_prp_pools(dev); 1713574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox disable: 17140ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews pci_disable_device(pdev); 1715574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox pci_release_regions(pdev); 1716b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free: 1717b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->queues); 1718b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->entry); 1719b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev); 1720b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1721b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1722b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 17238d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartmanstatic void nvme_remove(struct pci_dev *pdev) 1724b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1725b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev = pci_get_drvdata(pdev); 1726b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_dev_remove(dev); 1727b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_disable_msix(pdev); 1728b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox iounmap(dev->bar); 1729b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_release_instance(dev); 1730091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvme_release_prp_pools(dev); 17310ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews pci_disable_device(pdev); 1732574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox pci_release_regions(pdev); 1733b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->queues); 1734b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->entry); 1735b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev); 1736b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1737b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1738b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* These functions are yet to be implemented */ 1739b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_detected NULL 1740b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_dump_registers NULL 1741b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_link_reset NULL 1742b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_slot_reset NULL 1743b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_resume NULL 1744b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_suspend NULL 1745b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_resume NULL 1746b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 17471d3520357df99baf4ad89f86268ac96cd38092d9Stephen Hemmingerstatic const struct pci_error_handlers nvme_err_handler = { 1748b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .error_detected = nvme_error_detected, 1749b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .mmio_enabled = nvme_dump_registers, 1750b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .link_reset = nvme_link_reset, 1751b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .slot_reset = nvme_slot_reset, 1752b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_error_resume, 1753b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1754b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1755b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* Move to pci_ids.h later */ 1756b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define PCI_CLASS_STORAGE_EXPRESS 0x010802 1757b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1758b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic DEFINE_PCI_DEVICE_TABLE(nvme_id_table) = { 1759b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, 1760b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { 0, } 1761b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1762b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_DEVICE_TABLE(pci, nvme_id_table); 1763b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1764b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct pci_driver nvme_driver = { 1765b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .name = "nvme", 1766b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .id_table = nvme_id_table, 1767b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .probe = nvme_probe, 17688d85fce77edfc22f1d6dbf78e3af723b4b556f3dGreg Kroah-Hartman .remove = nvme_remove, 1769b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .suspend = nvme_suspend, 1770b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_resume, 1771b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .err_handler = &nvme_err_handler, 1772b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1773b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1774b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __init nvme_init(void) 1775b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 17760ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox int result; 17771fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 17781fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); 17791fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (IS_ERR(nvme_thread)) 17801fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return PTR_ERR(nvme_thread); 1781b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 17825c42ea1643a630060f9e71e06d3933d244970967Keith Busch result = register_blkdev(nvme_major, "nvme"); 17835c42ea1643a630060f9e71e06d3933d244970967Keith Busch if (result < 0) 17841fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto kill_kthread; 17855c42ea1643a630060f9e71e06d3933d244970967Keith Busch else if (result > 0) 17860ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox nvme_major = result; 1787b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1788b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = pci_register_driver(&nvme_driver); 17891fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (result) 17901fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto unregister_blkdev; 17911fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 1792b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 17931fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox unregister_blkdev: 1794b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 17951fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kill_kthread: 17961fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 1797b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1798b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1799b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1800b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void __exit nvme_exit(void) 1801b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1802b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_unregister_driver(&nvme_driver); 1803b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 18041fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 1805b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1806b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1807b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); 1808b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_LICENSE("GPL"); 1809366e8217e5ec6ce9f73aec19c46d983110fb4a98Matthew WilcoxMODULE_VERSION("0.8"); 1810b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_init(nvme_init); 1811b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_exit(nvme_exit); 1812