nvme-core.c revision eca18b2394a9387feeaf14cd884ddddd7a809d19
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#include <linux/version.h> 43b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 44b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define NVME_Q_DEPTH 1024 45b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define SQ_SIZE(depth) (depth * sizeof(struct nvme_command)) 46b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion)) 47b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define NVME_MINORS 64 48e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox#define IO_TIMEOUT (5 * HZ) 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 * Represents an NVM Express device. Each nvme_dev is a PCI function. 63b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 64b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstruct nvme_dev { 651fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct list_head node; 66b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue **queues; 67b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 __iomem *dbs; 68b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct pci_dev *pci_dev; 69091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct dma_pool *prp_page_pool; 7099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox struct dma_pool *prp_small_pool; 71b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int instance; 72b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int queue_count; 73f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox int db_stride; 74b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 ctrl_config; 75b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct msix_entry *entry; 76b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_bar __iomem *bar; 77b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct list_head namespaces; 7851814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox char serial[20]; 7951814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox char model[40]; 8051814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox char firmware_rev[8]; 81b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 82b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 83b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 84b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * An NVM Express namespace is equivalent to a SCSI LUN 85b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 86b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstruct nvme_ns { 87b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct list_head list; 88b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 89b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev; 90b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct request_queue *queue; 91b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct gendisk *disk; 92b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 93b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int ns_id; 94b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int lba_shift; 95b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 96b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 97b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 98b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * An NVM Express queue. Each device has at least two (one for admin 99b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * commands and one for I/O commands). 100b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 101b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstruct nvme_queue { 102b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *q_dmadev; 103091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct nvme_dev *dev; 104b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spinlock_t q_lock; 105b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command *sq_cmds; 106b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox volatile struct nvme_completion *cqes; 107b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t sq_dma_addr; 108b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t cq_dma_addr; 109b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wait_queue_head_t sq_full; 1101fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox wait_queue_t sq_cong_wait; 111b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio_list sq_cong; 112b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 __iomem *q_db; 113b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 q_depth; 114b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 cq_vector; 115b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 sq_head; 116b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 sq_tail; 117b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 cq_head; 118821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox u16 cq_phase; 119b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long cmdid_data[]; 120b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 121b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 122b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 123b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Check we didin't inadvertently grow the command struct 124b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 125b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic inline void _nvme_check_size(void) 126b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 127b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); 128b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); 129b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); 130b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); 131b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_features) != 64); 132b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_command) != 64); 133b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096); 134b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096); 135b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); 136b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 137b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1385c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxtypedef void (*nvme_completion_fn)(struct nvme_dev *, void *, 139c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *); 140c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 141e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstruct nvme_cmd_info { 142c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 143c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 144e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox unsigned long timeout; 145e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox}; 146e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 147e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstatic struct nvme_cmd_info *nvme_cmd_info(struct nvme_queue *nvmeq) 148e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox{ 149e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return (void *)&nvmeq->cmdid_data[BITS_TO_LONGS(nvmeq->q_depth)]; 150e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox} 151e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 152b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 153714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * alloc_cmdid() - Allocate a Command ID 154714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @nvmeq: The queue that will be used for this command 155714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @ctx: A pointer that will be passed to the handler 156c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox * @handler: The function to call on completion 157b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 158b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Allocate a Command ID for a queue. The data passed in will 159b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * be passed to the completion handler. This is implemented by using 160b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the bottom two bits of the ctx pointer to store the handler ID. 161b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Passing in a pointer that's not 4-byte aligned will cause a BUG. 162b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * We can change this if it becomes a problem. 163184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * 164184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * May be called with local interrupts disabled and the q_lock held, 165184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * or with interrupts enabled and no locks held. 166b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 167c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic int alloc_cmdid(struct nvme_queue *nvmeq, void *ctx, 168c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 169b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 170e6d15f79f997a98b3a69abbc462fc9041cc1a7b4Matthew Wilcox int depth = nvmeq->q_depth - 1; 171e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 172b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 173b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 174b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox do { 175b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdid = find_first_zero_bit(nvmeq->cmdid_data, depth); 176b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid >= depth) 177b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EBUSY; 178b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } while (test_and_set_bit(cmdid, nvmeq->cmdid_data)); 179b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 180c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = handler; 181c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].ctx = ctx; 182e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].timeout = jiffies + timeout; 183b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 184b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 185b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 186b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int alloc_cmdid_killable(struct nvme_queue *nvmeq, void *ctx, 187c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 188b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 189b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 190b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wait_event_killable(nvmeq->sq_full, 191e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox (cmdid = alloc_cmdid(nvmeq, ctx, handler, timeout)) >= 0); 192b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return (cmdid < 0) ? -EINTR : cmdid; 193b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 194b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 195c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox/* Special values must be less than 0x1000 */ 196c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox#define CMD_CTX_BASE ((void *)POISON_POINTER_DELTA) 197d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_CANCELLED (0x30C + CMD_CTX_BASE) 198d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_COMPLETED (0x310 + CMD_CTX_BASE) 199d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_INVALID (0x314 + CMD_CTX_BASE) 20000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox#define CMD_CTX_FLUSH (0x318 + CMD_CTX_BASE) 201be7b62754e097adc0cb16c25c9ee86ee20de62fbMatthew Wilcox 2025c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void special_completion(struct nvme_dev *dev, void *ctx, 203c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 204c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 205c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_CANCELLED) 206c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 207c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_FLUSH) 208c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 209c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_COMPLETED) { 2105c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, 211c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "completed id %d twice on queue %d\n", 212c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 213c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 214c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 215c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_INVALID) { 2165c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, 217c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "invalid id %d completed on queue %d\n", 218c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 219c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 220c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 221c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 2225c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, "Unknown special completion %p\n", ctx); 223c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 224c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 225184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 226184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 227184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 228c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *free_cmdid(struct nvme_queue *nvmeq, int cmdid, 229c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 230b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 231c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 232e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 233b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 234c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (cmdid >= nvmeq->q_depth) { 235c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = special_completion; 23648e3d39816416b3bf03dee3a796c0c04427c1a31Matthew Wilcox return CMD_CTX_INVALID; 237c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 238c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = info[cmdid].fn; 239c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 240c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 241e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_COMPLETED; 242b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox clear_bit(cmdid, nvmeq->cmdid_data); 243b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wake_up(&nvmeq->sq_full); 244c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 245b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 246b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 247c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *cancel_cmdid(struct nvme_queue *nvmeq, int cmdid, 248c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 2493c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 250c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 251e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 252c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (fn) 253c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = info[cmdid].fn; 254c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 255c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 256e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_CANCELLED; 257c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 2583c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 2593c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 260040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcoxstatic struct nvme_queue *get_nvmeq(struct nvme_dev *dev) 261b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 262040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox return dev->queues[get_cpu() + 1]; 263b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 264b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 265b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void put_nvmeq(struct nvme_queue *nvmeq) 266b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2671b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox put_cpu(); 268b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 269b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 270b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 271714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * nvme_submit_cmd() - Copy a command into a queue and ring the doorbell 272b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @nvmeq: The queue to use 273b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @cmd: The command to send 274b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 275b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Safe to use from interrupt context 276b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 277b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd) 278b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 279b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long flags; 280b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 tail; 281b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_irqsave(&nvmeq->q_lock, flags); 282b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = nvmeq->sq_tail; 283b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); 284b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++tail == nvmeq->q_depth) 285b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = 0; 2867547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(tail, nvmeq->q_db); 287b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = tail; 288b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_unlock_irqrestore(&nvmeq->q_lock, flags); 289b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 290b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 291b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 292b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 293eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox/* 294eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * The nvme_iod describes the data in an I/O, including the list of PRP 295eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * entries. You can't see it in this data structure because C doesn't let 296eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * me express that. Use nvme_alloc_iod to ensure there's enough space 297eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * allocated to store the PRP list. 298eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox */ 299eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstruct nvme_iod { 300eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox void *private; /* For the use of the submitter of the I/O */ 301eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int npages; /* In the PRP list. 0 means small pool in use */ 302eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int offset; /* Of PRP list */ 303eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int nents; /* Used in scatterlist */ 304eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int length; /* Of data, in bytes */ 305e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr_t first_dma; 306eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct scatterlist sg[0]; 307e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews}; 308e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 309eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic __le64 **iod_list(struct nvme_iod *iod) 310e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews{ 311eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ((void *)iod) + iod->offset; 312e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews} 313e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 314eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox/* 315eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * Will slightly overestimate the number of pages needed. This is OK 316eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * as it only leads to a small amount of wasted memory for the lifetime of 317eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * the I/O. 318eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox */ 319eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic int nvme_npages(unsigned size) 320eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox{ 321eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned nprps = DIV_ROUND_UP(size + PAGE_SIZE, PAGE_SIZE); 322eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); 323eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox} 324b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 325eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic struct nvme_iod * 326eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxnvme_alloc_iod(unsigned nseg, unsigned nbytes, gfp_t gfp) 327b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 328eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = kmalloc(sizeof(struct nvme_iod) + 329eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(__le64 *) * nvme_npages(nbytes) + 330eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(struct scatterlist) * nseg, gfp); 331eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 332eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod) { 333eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->offset = offsetof(struct nvme_iod, sg[nseg]); 334eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 335eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->length = nbytes; 336eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 337eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 338eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 339b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 340b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 341eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod) 342b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 343eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox const int last_prp = PAGE_SIZE / 8 - 1; 344eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int i; 345eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 346eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t prp_dma = iod->first_dma; 347eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 348eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod->npages == 0) 349eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_small_pool, list[0], prp_dma); 350eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox for (i = 0; i < iod->npages; i++) { 351eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 *prp_list = list[i]; 352eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t next_prp_dma = le64_to_cpu(prp_list[last_prp]); 353eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); 354eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox prp_dma = next_prp_dma; 355eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 356eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 357b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 358b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3595c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void requeue_bio(struct nvme_dev *dev, struct bio *bio) 3605c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox{ 3615c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox struct nvme_queue *nvmeq = get_nvmeq(dev); 3625c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 3635c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 3645c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox bio_list_add(&nvmeq->sq_cong, bio); 3655c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox put_nvmeq(nvmeq); 3665c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox wake_up_process(nvme_thread); 3675c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox} 3685c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox 3695c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void bio_completion(struct nvme_dev *dev, void *ctx, 370b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion *cqe) 371b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 372eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = ctx; 373eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct bio *bio = iod->private; 374b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 status = le16_to_cpup(&cqe->status) >> 1; 375b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 376eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 377b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_data_dir(bio) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 378eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 37909a58f536436efed02ead722e835cb4ce7674afcMatthew Wilcox if (status) { 3801ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, -EIO); 38109a58f536436efed02ead722e835cb4ce7674afcMatthew Wilcox } else if (bio->bi_vcnt > bio->bi_idx) { 3825c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox requeue_bio(dev, bio); 3831ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox } else { 3841ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, 0); 3851ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox } 386b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 387b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 388184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* length is in bytes. gfp flags indicates whether we may sleep. */ 389eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic int nvme_setup_prps(struct nvme_dev *dev, 390eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_common_command *cmd, struct nvme_iod *iod, 391eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int total_len, gfp_t gfp) 392ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox{ 39399802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox struct dma_pool *pool; 394eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int length = total_len; 395eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct scatterlist *sg = iod->sg; 396ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int dma_len = sg_dma_len(sg); 397ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox u64 dma_addr = sg_dma_address(sg); 398ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int offset = offset_in_page(dma_addr); 399e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *prp_list; 400eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 401e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr_t prp_dma; 402eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int nprps, i; 403ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 404ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmd->prp1 = cpu_to_le64(dma_addr); 405ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox length -= (PAGE_SIZE - offset); 406ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= 0) 407eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 408ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 409ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len -= (PAGE_SIZE - offset); 410ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (dma_len) { 411ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr += (PAGE_SIZE - offset); 412ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } else { 413ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox sg = sg_next(sg); 414ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr = sg_dma_address(sg); 415ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len = sg_dma_len(sg); 416ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 417ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 418ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= PAGE_SIZE) { 419ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmd->prp2 = cpu_to_le64(dma_addr); 420eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 421e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 422e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 423e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews nprps = DIV_ROUND_UP(length, PAGE_SIZE); 42499802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (nprps <= (256 / 8)) { 42599802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_small_pool; 426eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 0; 42799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } else { 42899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_page_pool; 429eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 1; 43099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 43199802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 432b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 433b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (!prp_list) { 434b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox cmd->prp2 = cpu_to_le64(dma_addr); 435eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 436eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return (total_len - length) + PAGE_SIZE; 437b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox } 438eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[0] = prp_list; 439eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->first_dma = prp_dma; 440e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews cmd->prp2 = cpu_to_le64(prp_dma); 441e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews i = 0; 442e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews for (;;) { 4437523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox if (i == PAGE_SIZE / 8) { 444e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *old_prp_list = prp_list; 445b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 446eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!prp_list) 447eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len - length; 448eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[iod->npages++] = prp_list; 4497523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox prp_list[0] = old_prp_list[i - 1]; 4507523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox old_prp_list[i - 1] = cpu_to_le64(prp_dma); 4517523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox i = 1; 452e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 453e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews prp_list[i++] = cpu_to_le64(dma_addr); 454e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len -= PAGE_SIZE; 455e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr += PAGE_SIZE; 456e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews length -= PAGE_SIZE; 457e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (length <= 0) 458e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews break; 459e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (dma_len > 0) 460e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews continue; 461e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews BUG_ON(dma_len < 0); 462e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews sg = sg_next(sg); 463e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr = sg_dma_address(sg); 464e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len = sg_dma_len(sg); 465ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 466ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 467eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 468ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox} 469ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 4701ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox/* NVMe scatterlists require no holes in the virtual address */ 4711ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox#define BIOVEC_NOT_VIRT_MERGEABLE(vec1, vec2) ((vec2)->bv_offset || \ 4721ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox (((vec1)->bv_offset + (vec1)->bv_len) % PAGE_SIZE)) 4731ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox 474eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic int nvme_map_bio(struct device *dev, struct nvme_iod *iod, 475b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio, enum dma_data_direction dma_dir, int psegs) 476b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 477768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox struct bio_vec *bvec, *bvprv = NULL; 478768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox struct scatterlist *sg = NULL; 4791ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox int i, old_idx, length = 0, nsegs = 0; 480b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 481eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg_init_table(iod->sg, psegs); 4821ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox old_idx = bio->bi_idx; 483b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_for_each_segment(bvec, bio, i) { 484768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox if (bvprv && BIOVEC_PHYS_MERGEABLE(bvprv, bvec)) { 485768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg->length += bvec->bv_len; 486768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } else { 4871ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox if (bvprv && BIOVEC_NOT_VIRT_MERGEABLE(bvprv, bvec)) 4881ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox break; 489eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = sg ? sg + 1 : iod->sg; 490768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_set_page(sg, bvec->bv_page, bvec->bv_len, 491768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvec->bv_offset); 492768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox nsegs++; 493768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } 4941ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox length += bvec->bv_len; 495768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvprv = bvec; 496b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 4971ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio->bi_idx = i; 498eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->nents = nsegs; 499768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_mark_end(sg); 500eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (dma_map_sg(dev, iod->sg, iod->nents, dma_dir) == 0) { 5011ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio->bi_idx = old_idx; 5021ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return -ENOMEM; 5031ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox } 5041ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return length; 505b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 506b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 50700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcoxstatic int nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns, 50800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid) 50900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 51000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 51100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 51200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 51300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.opcode = nvme_cmd_flush; 51400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.command_id = cmdid; 51500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.nsid = cpu_to_le32(ns->ns_id); 51600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 51700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 51800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox nvmeq->sq_tail = 0; 51900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 52000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 52100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return 0; 52200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 52300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 52400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcoxstatic int nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns) 52500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 52600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid = alloc_cmdid(nvmeq, (void *)CMD_CTX_FLUSH, 527c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox special_completion, IO_TIMEOUT); 52800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (unlikely(cmdid < 0)) 52900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return cmdid; 53000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 53100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 53200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 53300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 534184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 535184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 536184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 537b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns, 538b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio) 539b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 540ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox struct nvme_command *cmnd; 541eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 542b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox enum dma_data_direction dma_dir; 5431ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox int cmdid, length, result = -ENOMEM; 544b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 control; 545b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 dsmgmt; 546b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int psegs = bio_phys_segments(ns->queue, bio); 547b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 54800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && psegs) { 54900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox result = nvme_submit_flush_data(nvmeq, ns); 55000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (result) 55100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return result; 55200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox } 55300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 554eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(psegs, bio->bi_size, GFP_ATOMIC); 555eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!iod) 556eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox goto nomem; 557eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->private = bio; 558b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 559eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox result = -EBUSY; 560eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox cmdid = alloc_cmdid(nvmeq, iod, bio_completion, IO_TIMEOUT); 561b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (unlikely(cmdid < 0)) 562eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 563b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 56400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && !psegs) 56500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 56600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 567b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control = 0; 568b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_FUA) 569b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_FUA; 570b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & (REQ_FAILFAST_DEV | REQ_RAHEAD)) 571b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_LR; 572b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 573b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt = 0; 574b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_RAHEAD) 575b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; 576b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 577ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 578b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 579b8deb62cf271fa9381edc8cf52bcae2f0225c55aMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 580b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio_data_dir(bio)) { 581ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_write; 582b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_TO_DEVICE; 583b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } else { 584ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_read; 585b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_FROM_DEVICE; 586b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 587b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 588eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox result = nvme_map_bio(nvmeq->q_dmadev, iod, bio, dma_dir, psegs); 5891ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox if (result < 0) 590eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 5911ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox length = result; 592b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 593ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.command_id = cmdid; 594ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.nsid = cpu_to_le32(ns->ns_id); 595eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(nvmeq->dev, &cmnd->common, iod, length, 596eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_ATOMIC); 597ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.slba = cpu_to_le64(bio->bi_sector >> (ns->lba_shift - 9)); 5981ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox cmnd->rw.length = cpu_to_le16((length >> ns->lba_shift) - 1); 599ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.control = cpu_to_le16(control); 600ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); 601b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 602d8ee9d69f275769aaad40ef7c944565ff8d2d24fMatthew Wilcox bio->bi_sector += length >> 9; 603d8ee9d69f275769aaad40ef7c944565ff8d2d24fMatthew Wilcox 604b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 605b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = 0; 6067547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 607b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 6081974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox return 0; 6091974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox 610eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 611eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(nvmeq->dev, iod); 612eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox nomem: 613eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox return result; 614b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 615b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 616b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 617b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * NB: return value of non-zero would mean that we were a stacking driver. 618b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * make_request must always succeed. 619b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 620b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_make_request(struct request_queue *q, struct bio *bio) 621b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 622b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = q->queuedata; 623040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox struct nvme_queue *nvmeq = get_nvmeq(ns->dev); 624eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox int result = -EBUSY; 625eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox 626eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 627eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 628eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox result = nvme_submit_bio_queue(nvmeq, ns, bio); 629eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (unlikely(result)) { 630eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 631eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 632b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_add(&nvmeq->sq_cong, bio); 633b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 634eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox 635eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 636b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox put_nvmeq(nvmeq); 637b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 638b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 639b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 640b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 641b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_process_cq(struct nvme_queue *nvmeq) 642b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 643821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox u16 head, phase; 644b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 645b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = nvmeq->cq_head; 646821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = nvmeq->cq_phase; 647b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 648b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (;;) { 649c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 650c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 651b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion cqe = nvmeq->cqes[head]; 652821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != phase) 653b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox break; 654b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_head = le16_to_cpu(cqe.sq_head); 655b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++head == nvmeq->q_depth) { 656b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = 0; 657821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = !phase; 658b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 659b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 660c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = free_cmdid(nvmeq, cqe.command_id, &fn); 6615c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox fn(nvmeq->dev, ctx, &cqe); 662b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 663b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 664b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* If the controller ignores the cq head doorbell and continuously 665b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * writes to the queue, it is theoretically possible to wrap around 666b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the queue twice and mistakenly return IRQ_NONE. Linux only 667b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * requires that 0.1% of your interrupts are handled, so this isn't 668b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * a big problem. 669b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 670821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) 671b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return IRQ_NONE; 672b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 673f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox writel(head, nvmeq->q_db + (1 << nvmeq->dev->db_stride)); 674b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = head; 675821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = phase; 676b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 677b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return IRQ_HANDLED; 678b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 679b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 680b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_irq(int irq, void *data) 681b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 68258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox irqreturn_t result; 68358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 68458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_lock(&nvmeq->q_lock); 68558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox result = nvme_process_cq(nvmeq); 68658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_unlock(&nvmeq->q_lock); 68758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return result; 68858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 68958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 69058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic irqreturn_t nvme_irq_check(int irq, void *data) 69158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox{ 69258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 69358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; 69458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) 69558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_NONE; 69658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_WAKE_THREAD; 69758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 69858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 6993c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcoxstatic void nvme_abort_command(struct nvme_queue *nvmeq, int cmdid) 7003c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 7013c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 702c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cancel_cmdid(nvmeq, cmdid, NULL); 7033c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 7043c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 7053c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 706c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstruct sync_cmd_info { 707c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct task_struct *task; 708c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox u32 result; 709c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox int status; 710c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox}; 711c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 7125c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void sync_completion(struct nvme_dev *dev, void *ctx, 713c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 714c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 715c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct sync_cmd_info *cmdinfo = ctx; 716c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->result = le32_to_cpup(&cqe->result); 717c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; 718c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox wake_up_process(cmdinfo->task); 719c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 720c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 721b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 722b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Returns 0 on success. If the result is negative, it's a Linux error code; 723b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * if the result is positive, it's an NVM Express status code 724b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 7253c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcoxstatic int nvme_submit_sync_cmd(struct nvme_queue *nvmeq, 726e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_command *cmd, u32 *result, unsigned timeout) 727b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 728b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 729b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct sync_cmd_info cmdinfo; 730b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 731b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.task = current; 732b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.status = -EINTR; 733b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 734c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdid = alloc_cmdid_killable(nvmeq, &cmdinfo, sync_completion, 735e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox timeout); 736b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid < 0) 737b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 738b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmd->common.command_id = cmdid; 739b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7403c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox set_current_state(TASK_KILLABLE); 7413c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_submit_cmd(nvmeq, cmd); 742b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox schedule(); 743b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7443c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox if (cmdinfo.status == -EINTR) { 7453c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_abort_command(nvmeq, cmdid); 7463c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox return -EINTR; 7473c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox } 7483c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 749b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 750b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox *result = cmdinfo.result; 751b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 752b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdinfo.status; 753b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 754b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 755b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd, 756b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 *result) 757b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 758e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return nvme_submit_sync_cmd(dev->queues[0], cmd, result, ADMIN_TIMEOUT); 759b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 760b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 761b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) 762b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 763b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 764b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 765b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 766b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 767b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.opcode = opcode; 768b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.qid = cpu_to_le16(id); 769b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 770b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 771b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 772b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 773b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 774b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 775b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 776b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, 777b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 778b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 779b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 780b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 781b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; 782b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 783b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 784b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.opcode = nvme_admin_create_cq; 785b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); 786b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cqid = cpu_to_le16(qid); 787b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 788b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cq_flags = cpu_to_le16(flags); 789b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); 790b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 791b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 792b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 793b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 794b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 795b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 796b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 797b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, 798b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 799b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 800b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 801b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 802b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; 803b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 804b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 805b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.opcode = nvme_admin_create_sq; 806b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); 807b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sqid = cpu_to_le16(qid); 808b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 809b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sq_flags = cpu_to_le16(flags); 810b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.cqid = cpu_to_le16(qid); 811b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 812b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 813b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 814b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 815b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 816b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 817b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 818b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) 819b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 820b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); 821b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 822b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 823b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) 824b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 825b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); 826b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 827b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 828bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcoxstatic int nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns, 829bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox dma_addr_t dma_addr) 830bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 831bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 832bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 833bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 834bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.opcode = nvme_admin_identify; 835bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.nsid = cpu_to_le32(nsid); 836bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.prp1 = cpu_to_le64(dma_addr); 837bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.cns = cpu_to_le32(cns); 838bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 839bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, NULL); 840bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 841bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 842bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcoxstatic int nvme_get_features(struct nvme_dev *dev, unsigned fid, 843bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox unsigned dword11, dma_addr_t dma_addr, u32 *result) 844bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 845bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 846bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 847bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 848bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.opcode = nvme_admin_get_features; 849bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 850bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.fid = cpu_to_le32(fid); 851bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.dword11 = cpu_to_le32(dword11); 852bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 853bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, result); 854bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 855bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 856b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_free_queue(struct nvme_dev *dev, int qid) 857b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 858b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = dev->queues[qid]; 859aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox int vector = dev->entry[nvmeq->cq_vector].vector; 860b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 861aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox irq_set_affinity_hint(vector, NULL); 862aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox free_irq(vector, nvmeq); 863b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 864b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* Don't tell the adapter to delete the admin queue */ 865b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (qid) { 866b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 867b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 868b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 869b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 870b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 871b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 872b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 873b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 874b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 875b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 876b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 877b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, 878b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int depth, int vector) 879b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 880b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 881e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox unsigned extra = (depth / 8) + (depth * sizeof(struct nvme_cmd_info)); 882b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq) + extra, GFP_KERNEL); 883b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq) 884b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 885b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 886b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cqes = dma_alloc_coherent(dmadev, CQ_SIZE(depth), 887b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->cq_dma_addr, GFP_KERNEL); 888b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->cqes) 889b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 890b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset((void *)nvmeq->cqes, 0, CQ_SIZE(depth)); 891b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 892b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds = dma_alloc_coherent(dmadev, SQ_SIZE(depth), 893b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->sq_dma_addr, GFP_KERNEL); 894b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->sq_cmds) 895b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_cqdma; 896b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 897b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_dmadev = dmadev; 898091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvmeq->dev = dev; 899b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_init(&nvmeq->q_lock); 900b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = 0; 901821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = 1; 902b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox init_waitqueue_head(&nvmeq->sq_full); 9031fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox init_waitqueue_entry(&nvmeq->sq_cong_wait, nvme_thread); 904b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_init(&nvmeq->sq_cong); 905f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox nvmeq->q_db = &dev->dbs[qid << (dev->db_stride + 1)]; 906b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_depth = depth; 907b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_vector = vector; 908b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 909b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 910b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 911b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_cqdma: 912b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(dmadev, CQ_SIZE(nvmeq->q_depth), (void *)nvmeq->cqes, 913b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_dma_addr); 914b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 915b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 916b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 917b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 918b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9193001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcoxstatic int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, 9203001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox const char *name) 9213001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox{ 92258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if (use_threaded_interrupts) 92358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, 924ec6ce618d65b5ce1bef83a5509255107a0feac44Matthew Wilcox nvme_irq_check, nvme_irq, 92558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox IRQF_DISABLED | IRQF_SHARED, 92658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox name, nvmeq); 9273001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, 9283001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox IRQF_DISABLED | IRQF_SHARED, name, nvmeq); 9293001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox} 9303001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox 931b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic __devinit struct nvme_queue *nvme_create_queue(struct nvme_dev *dev, 932b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int qid, int cq_size, int vector) 933b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 934b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int result; 935b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = nvme_alloc_queue(dev, qid, cq_size, vector); 936b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9373f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox if (!nvmeq) 9386f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return ERR_PTR(-ENOMEM); 9393f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox 940b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_cq(dev, qid, nvmeq); 941b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 942b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 943b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 944b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_sq(dev, qid, nvmeq); 945b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 946b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_cq; 947b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9483001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme"); 949b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 950b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_sq; 951b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 952b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 953b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 954b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_sq: 955b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 956b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_cq: 957b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 958b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 959b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 960b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 961b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 962b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 963b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 9646f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return ERR_PTR(result); 965b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 966b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 967b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __devinit nvme_configure_admin_queue(struct nvme_dev *dev) 968b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 969b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int result; 970b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 aqa; 97122605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox u64 cap; 97222605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox unsigned long timeout; 973b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq; 974b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 975b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 976b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 977b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq = nvme_alloc_queue(dev, 0, 64, 0); 9783f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox if (!nvmeq) 9793f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox return -ENOMEM; 980b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 981b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa = nvmeq->q_depth - 1; 982b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa |= aqa << 16; 983b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 984b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config = NVME_CC_ENABLE | NVME_CC_CSS_NVM; 985b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= (PAGE_SHIFT - 12) << NVME_CC_MPS_SHIFT; 986b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; 9877f53f9d2424533256ae86f7df5661a17de743de8Matthew Wilcox dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; 988b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9895911f20039ce59d7e7834f0c42151cf759b6f786Shane Michael Matthews writel(0, &dev->bar->cc); 990b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(aqa, &dev->bar->aqa); 991b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->sq_dma_addr, &dev->bar->asq); 992b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->cq_dma_addr, &dev->bar->acq); 993b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(dev->ctrl_config, &dev->bar->cc); 994b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 99522605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox cap = readq(&dev->bar->cap); 99622605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; 997f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->db_stride = NVME_CAP_STRIDE(cap); 99822605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox 999b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox while (!(readl(&dev->bar->csts) & NVME_CSTS_RDY)) { 1000b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox msleep(100); 1001b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (fatal_signal_pending(current)) 1002b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EINTR; 100322605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox if (time_after(jiffies, timeout)) { 100422605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox dev_err(&dev->pci_dev->dev, 100522605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox "Device not ready; aborting initialisation\n"); 100622605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox return -ENODEV; 100722605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox } 1008b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1009b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10103001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme admin"); 1011b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->queues[0] = nvmeq; 1012b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1013b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1014b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1015eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write, 1016eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned long addr, unsigned length) 1017b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 101836c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox int i, err, count, nents, offset; 10197fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct scatterlist *sg; 10207fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct page **pages; 1021eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 102236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 102336c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (addr & 3) 1024eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 10257fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox if (!length) 1026eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 10277fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 102836c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox offset = offset_in_page(addr); 10297fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox count = DIV_ROUND_UP(offset + length, PAGE_SIZE); 10307fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox pages = kcalloc(count, sizeof(*pages), GFP_KERNEL); 103136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 103236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = get_user_pages_fast(addr, count, 1, pages); 103336c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (err < count) { 103436c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox count = err; 103536c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = -EFAULT; 103636c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox goto put_pages; 103736c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox } 10387fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 1039eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(count, length, GFP_KERNEL); 1040eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = iod->sg; 104136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox sg_init_table(sg, count); 1042d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox for (i = 0; i < count; i++) { 1043d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox sg_set_page(&sg[i], pages[i], 1044d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox min_t(int, length, PAGE_SIZE - offset), offset); 1045d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox length -= (PAGE_SIZE - offset); 1046d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox offset = 0; 10477fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox } 10487fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 10497fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox err = -ENOMEM; 10507fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox nents = dma_map_sg(&dev->pci_dev->dev, sg, count, 10517fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 105236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (!nents) 1053eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 1054b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10557fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1056eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 1057b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1058eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 1059eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 10607fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_pages: 10617fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox for (i = 0; i < count; i++) 10627fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_page(pages[i]); 10637fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1064eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(err); 10657fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1066b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10677fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcoxstatic void nvme_unmap_user_pages(struct nvme_dev *dev, int write, 1068eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned long addr, int length, struct nvme_iod *iod) 10697fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox{ 1070eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct scatterlist *sg = iod->sg; 10717fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox int i, count; 1072b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10737fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox count = DIV_ROUND_UP(offset_in_page(addr) + length, PAGE_SIZE); 1074d1a490e026efb22851ed60588b5fad1281d80ec3Nisheeth Bhat dma_unmap_sg(&dev->pci_dev->dev, sg, count, DMA_FROM_DEVICE); 10757fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 107636c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox for (i = 0; i < count; i++) 10777fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_page(sg_page(&sg[i])); 10787fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1079b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1080a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcoxstatic int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) 1081a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox{ 1082a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_dev *dev = ns->dev; 1083a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_queue *nvmeq; 1084a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_user_io io; 1085a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_command c; 1086a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox unsigned length; 1087eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int status; 1088eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 1089a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1090a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox if (copy_from_user(&io, uio, sizeof(io))) 1091a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return -EFAULT; 10926c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox length = (io.nblocks + 1) << ns->lba_shift; 10936c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 10946c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox switch (io.opcode) { 10956c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_write: 10966c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_read: 10976bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case nvme_cmd_compare: 1098eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_map_user_pages(dev, io.opcode & 1, io.addr, length); 10996413214c5d424fd5aae6567848340f962ad2ce0fMatthew Wilcox break; 11006c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox default: 11016bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EINVAL; 11026c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox } 11036c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 1104eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1105eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1106a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1107a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox memset(&c, 0, sizeof(c)); 1108a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.opcode = io.opcode; 1109a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.flags = io.flags; 11106c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.nsid = cpu_to_le32(ns->ns_id); 1111a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.slba = cpu_to_le64(io.slba); 11126c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.length = cpu_to_le16(io.nblocks); 1113a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.control = cpu_to_le16(io.control); 1114a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.dsmgmt = cpu_to_le16(io.dsmgmt); 11156c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.reftag = io.reftag; 11166c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.apptag = io.apptag; 11176c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.appmask = io.appmask; 1118a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox /* XXX: metadata */ 1119eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, GFP_KERNEL); 1120a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1121040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox nvmeq = get_nvmeq(dev); 1122fa92282149842645931580225647238428374758Matthew Wilcox /* 1123fa92282149842645931580225647238428374758Matthew Wilcox * Since nvme_submit_sync_cmd sleeps, we can't keep preemption 1124b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * disabled. We may be preempted at any point, and be rescheduled 1125b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * to a different CPU. That will cause cacheline bouncing, but no 1126b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * additional races since q_lock already protects against other CPUs. 1127b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox */ 1128a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox put_nvmeq(nvmeq); 1129b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (length != (io.nblocks + 1) << ns->lba_shift) 1130b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1131b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 1132b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = nvme_submit_sync_cmd(nvmeq, &c, NULL, IO_TIMEOUT); 1133a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1134eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_unmap_user_pages(dev, io.opcode & 1, io.addr, length, iod); 1135eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 1136a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return status; 1137a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox} 1138a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 11396bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcoxstatic int nvme_user_admin_cmd(struct nvme_ns *ns, 11406bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd __user *ucmd) 11416ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox{ 11426ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox struct nvme_dev *dev = ns->dev; 11436bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd cmd; 11446ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox struct nvme_command c; 1145eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int status, length; 1146eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 11476ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 11486bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (!capable(CAP_SYS_ADMIN)) 11496bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EACCES; 11506bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (copy_from_user(&cmd, ucmd, sizeof(cmd))) 11516ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return -EFAULT; 11526ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 11536ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox memset(&c, 0, sizeof(c)); 11546bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.opcode = cmd.opcode; 11556bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.flags = cmd.flags; 11566bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.nsid = cpu_to_le32(cmd.nsid); 11576bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); 11586bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); 11596bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); 11606bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); 11616bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); 11626bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); 11636bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); 11646bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); 11656bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 11666bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox length = cmd.data_len; 11676bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 1168eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_map_user_pages(dev, 1, cmd.addr, length); 1169eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1170eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1171eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, 1172eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_KERNEL); 11736bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 11746bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 11756bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (length != cmd.data_len) 1176b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1177b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 1178b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 1179eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 11806bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 1181eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_unmap_user_pages(dev, 0, cmd.addr, cmd.data_len, iod); 1182eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 11836bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 11846ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return status; 11856ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox} 11866ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 1187b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, 1188b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long arg) 1189b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1190b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = bdev->bd_disk->private_data; 1191b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1192b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox switch (cmd) { 11936bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ID: 11946bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return ns->ns_id; 11956bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ADMIN_CMD: 11966bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return nvme_user_admin_cmd(ns, (void __user *)arg); 1197a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox case NVME_IOCTL_SUBMIT_IO: 1198a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return nvme_submit_io(ns, (void __user *)arg); 1199b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox default: 1200b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOTTY; 1201b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1202b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1203b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1204b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic const struct block_device_operations nvme_fops = { 1205b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .owner = THIS_MODULE, 1206b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .ioctl = nvme_ioctl, 12074948168280b269a514045766ddd872cfac5968e1Matthew Wilcox .compat_ioctl = nvme_ioctl, 1208b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1209b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12108de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcoxstatic void nvme_timeout_ios(struct nvme_queue *nvmeq) 12118de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox{ 12128de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox int depth = nvmeq->q_depth - 1; 12138de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 12148de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox unsigned long now = jiffies; 12158de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox int cmdid; 12168de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox 12178de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox for_each_set_bit(cmdid, nvmeq->cmdid_data, depth) { 1218c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 1219c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 12208de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox static struct nvme_completion cqe = { .status = cpu_to_le16(NVME_SC_ABORT_REQ) << 1, }; 12218de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox 12228de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox if (!time_after(now, info[cmdid].timeout)) 12238de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox continue; 12248de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox dev_warn(nvmeq->q_dmadev, "Timing out I/O %d\n", cmdid); 1225c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = cancel_cmdid(nvmeq, cmdid, &fn); 12265c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox fn(nvmeq->dev, ctx, &cqe); 12278de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox } 12288de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox} 12298de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox 12301fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic void nvme_resubmit_bios(struct nvme_queue *nvmeq) 12311fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 12321fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (bio_list_peek(&nvmeq->sq_cong)) { 12331fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 12341fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_ns *ns = bio->bi_bdev->bd_disk->private_data; 12351fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_submit_bio_queue(nvmeq, ns, bio)) { 12361fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox bio_list_add_head(&nvmeq->sq_cong, bio); 12371fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox break; 12381fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 12393cb967c03926edd2c414082f4cc0feb7b372edaeMatthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 12403cb967c03926edd2c414082f4cc0feb7b372edaeMatthew Wilcox remove_wait_queue(&nvmeq->sq_full, 12413cb967c03926edd2c414082f4cc0feb7b372edaeMatthew Wilcox &nvmeq->sq_cong_wait); 12421fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 12431fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 12441fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 12451fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic int nvme_kthread(void *data) 12461fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 12471fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_dev *dev; 12481fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 12491fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (!kthread_should_stop()) { 12501fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox __set_current_state(TASK_RUNNING); 12511fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 12521fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_for_each_entry(dev, &dev_list, node) { 12531fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox int i; 12541fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox for (i = 0; i < dev->queue_count; i++) { 12551fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_queue *nvmeq = dev->queues[i]; 1256740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (!nvmeq) 1257740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox continue; 12581fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 12591fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_process_cq(nvmeq)) 12601fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox printk("process_cq did something\n"); 12618de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox nvme_timeout_ios(nvmeq); 12621fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_resubmit_bios(nvmeq); 12631fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 12641fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 12651fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 12661fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 12671fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox set_current_state(TASK_INTERRUPTIBLE); 12681fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox schedule_timeout(HZ); 12691fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 12701fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 12711fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 12721fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 12735aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic DEFINE_IDA(nvme_index_ida); 12745aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 12755aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic int nvme_get_ns_idx(void) 12765aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox{ 12775aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox int index, error; 12785aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 12795aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox do { 12805aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox if (!ida_pre_get(&nvme_index_ida, GFP_KERNEL)) 12815aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox return -1; 12825aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 12835aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_lock(&dev_list_lock); 12845aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox error = ida_get_new(&nvme_index_ida, &index); 12855aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_unlock(&dev_list_lock); 12865aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox } while (error == -EAGAIN); 12875aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 12885aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox if (error) 12895aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox index = -1; 12905aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox return index; 12915aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox} 12925aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 12935aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic void nvme_put_ns_idx(int index) 12945aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox{ 12955aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_lock(&dev_list_lock); 12965aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ida_remove(&nvme_index_ida, index); 12975aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_unlock(&dev_list_lock); 12985aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox} 12995aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 13005aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, int nsid, 1301b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_id_ns *id, struct nvme_lba_range_type *rt) 1302b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1303b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns; 1304b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct gendisk *disk; 1305b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int lbaf; 1306b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1307b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (rt->attributes & NVME_LBART_ATTRIB_HIDE) 1308b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1309b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1310b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns = kzalloc(sizeof(*ns), GFP_KERNEL); 1311b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns) 1312b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1313b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue = blk_alloc_queue(GFP_KERNEL); 1314b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns->queue) 1315b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_ns; 1316b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue->queue_flags = QUEUE_FLAG_DEFAULT | QUEUE_FLAG_NOMERGES | 1317b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox QUEUE_FLAG_NONROT | QUEUE_FLAG_DISCARD; 1318b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_queue_make_request(ns->queue, nvme_make_request); 1319b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->dev = dev; 1320b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue->queuedata = ns; 1321b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1322b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk = alloc_disk(NVME_MINORS); 1323b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!disk) 1324b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_queue; 13255aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ns->ns_id = nsid; 1326b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->disk = disk; 1327b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox lbaf = id->flbas & 0xf; 1328b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->lba_shift = id->lbaf[lbaf].ds; 1329b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1330b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->major = nvme_major; 1331b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->minors = NVME_MINORS; 13325aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox disk->first_minor = NVME_MINORS * nvme_get_ns_idx(); 1333b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->fops = &nvme_fops; 1334b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->private_data = ns; 1335b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->queue = ns->queue; 1336388f037f4e7f0a24bac6b1a24f144f5d939f58cfMatthew Wilcox disk->driverfs_dev = &dev->pci_dev->dev; 13375aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox sprintf(disk->disk_name, "nvme%dn%d", dev->instance, nsid); 1338b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); 1339b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1340b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return ns; 1341b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1342b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_queue: 1343b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1344b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_ns: 1345b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1346b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1347b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1348b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1349b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_ns_free(struct nvme_ns *ns) 1350b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 13515aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox int index = ns->disk->first_minor / NVME_MINORS; 1352b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox put_disk(ns->disk); 13535aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox nvme_put_ns_idx(index); 1354b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1355b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1356b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1357b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1358b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcoxstatic int set_queue_count(struct nvme_dev *dev, int count) 1359b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1360b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 1361b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 result; 1362b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcox u32 q_count = (count - 1) | ((count - 1) << 16); 1363b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1364bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox status = nvme_get_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0, 1365bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox &result); 1366b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 1367b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 1368b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return min(result & 0xffff, result >> 16) + 1; 1369b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1370b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1371b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __devinit nvme_setup_io_queues(struct nvme_dev *dev) 1372b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1373f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox int result, cpu, i, nr_io_queues, db_bar_size; 1374b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1375b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = num_online_cpus(); 1376b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox result = set_queue_count(dev, nr_io_queues); 13771b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox if (result < 0) 13781b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox return result; 1379b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox if (result < nr_io_queues) 1380b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = result; 1381b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 13821b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox /* Deregister the admin queue's interrupt */ 13831b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox free_irq(dev->entry[0].vector, dev->queues[0]); 13841b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1385f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox db_bar_size = 4096 + ((nr_io_queues + 1) << (dev->db_stride + 3)); 1386f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox if (db_bar_size > 8192) { 1387f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox iounmap(dev->bar); 1388f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->bar = ioremap(pci_resource_start(dev->pci_dev, 0), 1389f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox db_bar_size); 1390f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 1391f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->queues[0]->q_db = dev->dbs; 1392f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox } 1393f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox 1394b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) 13951b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->entry[i].entry = i; 13961b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox for (;;) { 1397b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox result = pci_enable_msix(dev->pci_dev, dev->entry, 1398b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues); 13991b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox if (result == 0) { 14001b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox break; 14011b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } else if (result > 0) { 1402b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = result; 14031b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox continue; 14041b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } else { 1405b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = 1; 14061b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox break; 14071b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 14081b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 14091b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 14101b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox result = queue_request_irq(dev, dev->queues[0], "nvme admin"); 14111b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox /* XXX: handle failure here */ 14121b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 14131b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_first(cpu_online_mask); 1414b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) { 14151b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox irq_set_affinity_hint(dev->entry[i].vector, get_cpu_mask(cpu)); 14161b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_next(cpu, cpu_online_mask); 14171b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 14181b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1419b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) { 14201b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queues[i + 1] = nvme_create_queue(dev, i + 1, 14211b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox NVME_Q_DEPTH, i); 14226f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox if (IS_ERR(dev->queues[i + 1])) 14236f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return PTR_ERR(dev->queues[i + 1]); 14241b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queue_count++; 14251b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 1426b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14279ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox for (; i < num_possible_cpus(); i++) { 14289ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox int target = i % rounddown_pow_of_two(dev->queue_count - 1); 14299ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox dev->queues[i + 1] = dev->queues[target + 1]; 14309ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox } 14319ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox 1432b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1433b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1434b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1435b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_free_queues(struct nvme_dev *dev) 1436b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1437b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int i; 1438b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1439b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (i = dev->queue_count - 1; i >= 0; i--) 1440b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queue(dev, i); 1441b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1442b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1443b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __devinit nvme_dev_add(struct nvme_dev *dev) 1444b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1445b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int res, nn, i; 1446b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns, *next; 144751814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox struct nvme_id_ctrl *ctrl; 1448bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_id_ns *id_ns; 1449bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox void *mem; 1450b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t dma_addr; 1451b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1452b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = nvme_setup_io_queues(dev); 1453b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1454b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 1455b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1456bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox mem = dma_alloc_coherent(&dev->pci_dev->dev, 8192, &dma_addr, 1457b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 1458b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1459bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, 0, 1, dma_addr); 1460b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) { 1461b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = -EIO; 1462b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free; 1463b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1464b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1465bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ctrl = mem; 146651814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox nn = le32_to_cpup(&ctrl->nn); 146751814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn)); 146851814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn)); 146951814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr)); 1470b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1471bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox id_ns = mem; 14722b2c1896871838cdf549442e8ad0264be5fa74e3Matthew Wilcox for (i = 1; i <= nn; i++) { 1473bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, i, 0, dma_addr); 1474b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1475b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1476b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1477bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox if (id_ns->ncap == 0) 1478b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1479b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1480bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_get_features(dev, NVME_FEAT_LBA_RANGE, i, 1481bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox dma_addr + 4096, NULL); 1482b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1483b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1484b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1485bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ns = nvme_alloc_ns(dev, i, mem, mem + 4096); 1486b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (ns) 1487b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_add_tail(&ns->list, &dev->namespaces); 1488b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1489b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry(ns, &dev->namespaces, list) 1490b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox add_disk(ns->disk); 1491b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1492bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox goto out; 1493b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1494b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free: 1495b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 1496b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_del(&ns->list); 1497b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_ns_free(ns); 1498b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1499b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1500bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox out: 1501684f5c2025b067a23722e620d0b3b858d8dc5d01Matthew Wilcox dma_free_coherent(&dev->pci_dev->dev, 8192, mem, dma_addr); 1502b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 1503b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1504b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1505b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_dev_remove(struct nvme_dev *dev) 1506b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1507b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns, *next; 1508b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 15091fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 15101fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_del(&dev->node); 15111fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 15121fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 1513b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* TODO: wait all I/O finished or cancel them */ 1514b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1515b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 1516b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_del(&ns->list); 1517b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox del_gendisk(ns->disk); 1518b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_ns_free(ns); 1519b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1520b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1521b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queues(dev); 1522b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1523b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1524b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1525b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1526091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic int nvme_setup_prp_pools(struct nvme_dev *dev) 1527091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 1528091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 1529091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dev->prp_page_pool = dma_pool_create("prp list page", dmadev, 1530091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox PAGE_SIZE, PAGE_SIZE, 0); 1531091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (!dev->prp_page_pool) 1532091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return -ENOMEM; 1533091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 153499802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox /* Optimisation for I/Os between 4k and 128k */ 153599802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dev->prp_small_pool = dma_pool_create("prp list 256", dmadev, 153699802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 256, 256, 0); 153799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (!dev->prp_small_pool) { 153899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 153999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox return -ENOMEM; 154099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 1541091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return 0; 1542091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 1543091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1544091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic void nvme_release_prp_pools(struct nvme_dev *dev) 1545091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 1546091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 154799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_small_pool); 1548091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 1549091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1550b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* XXX: Use an ida or something to let remove / add work correctly */ 1551b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_set_instance(struct nvme_dev *dev) 1552b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1553b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox static int instance; 1554b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->instance = instance++; 1555b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1556b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1557b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_release_instance(struct nvme_dev *dev) 1558b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1559b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1560b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1561b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __devinit nvme_probe(struct pci_dev *pdev, 1562b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox const struct pci_device_id *id) 1563b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1564574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox int bars, result = -ENOMEM; 1565b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev; 1566b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1567b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev = kzalloc(sizeof(*dev), GFP_KERNEL); 1568b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev) 1569b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOMEM; 1570b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->entry = kcalloc(num_possible_cpus(), sizeof(*dev->entry), 1571b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 1572b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->entry) 1573b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 15741b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queues = kcalloc(num_possible_cpus() + 1, sizeof(void *), 15751b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox GFP_KERNEL); 1576b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->queues) 1577b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 1578b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 15790ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews if (pci_enable_device_mem(pdev)) 15800ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews goto free; 1581f64d3365a3e5cb46e69db7e2c82a7cb9a5bed1b8Matthew Wilcox pci_set_master(pdev); 1582574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox bars = pci_select_bars(pdev, IORESOURCE_MEM); 1583574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox if (pci_request_selected_regions(pdev, bars, "nvme")) 1584574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox goto disable; 15850ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews 1586b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox INIT_LIST_HEAD(&dev->namespaces); 1587b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->pci_dev = pdev; 1588b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_set_drvdata(pdev, dev); 15892930353f9f2b9e4629e935acd970cb73c1171229Matthew Wilcox dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); 15902930353f9f2b9e4629e935acd970cb73c1171229Matthew Wilcox dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); 1591b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_set_instance(dev); 159253c9577e9ca68a633c6e9df2b54eaecacfa77f62Matthew Wilcox dev->entry[0].vector = pdev->irq; 1593b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1594091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox result = nvme_setup_prp_pools(dev); 1595091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (result) 1596091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox goto disable_msix; 1597091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1598b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); 1599b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->bar) { 1600b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = -ENOMEM; 1601574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox goto disable_msix; 1602b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1603b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1604b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = nvme_configure_admin_queue(dev); 1605b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 1606b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto unmap; 1607b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->queue_count++; 1608b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 16091fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 16101fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_add(&dev->node, &dev_list); 16111fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 16121fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 1613740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox result = nvme_dev_add(dev); 1614740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (result) 1615740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox goto delete; 1616740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 1617b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1618b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1619b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox delete: 1620740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox spin_lock(&dev_list_lock); 1621740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox list_del(&dev->node); 1622740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox spin_unlock(&dev_list_lock); 1623740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 1624b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queues(dev); 1625b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unmap: 1626b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox iounmap(dev->bar); 1627574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox disable_msix: 1628b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_disable_msix(pdev); 1629b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_release_instance(dev); 1630091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvme_release_prp_pools(dev); 1631574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox disable: 16320ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews pci_disable_device(pdev); 1633574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox pci_release_regions(pdev); 1634b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free: 1635b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->queues); 1636b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->entry); 1637b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev); 1638b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1639b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1640b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1641b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void __devexit nvme_remove(struct pci_dev *pdev) 1642b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1643b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev = pci_get_drvdata(pdev); 1644b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_dev_remove(dev); 1645b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_disable_msix(pdev); 1646b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox iounmap(dev->bar); 1647b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_release_instance(dev); 1648091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvme_release_prp_pools(dev); 16490ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews pci_disable_device(pdev); 1650574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox pci_release_regions(pdev); 1651b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->queues); 1652b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->entry); 1653b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev); 1654b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1655b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1656b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* These functions are yet to be implemented */ 1657b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_detected NULL 1658b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_dump_registers NULL 1659b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_link_reset NULL 1660b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_slot_reset NULL 1661b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_resume NULL 1662b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_suspend NULL 1663b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_resume NULL 1664b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1665b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct pci_error_handlers nvme_err_handler = { 1666b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .error_detected = nvme_error_detected, 1667b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .mmio_enabled = nvme_dump_registers, 1668b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .link_reset = nvme_link_reset, 1669b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .slot_reset = nvme_slot_reset, 1670b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_error_resume, 1671b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1672b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1673b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* Move to pci_ids.h later */ 1674b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define PCI_CLASS_STORAGE_EXPRESS 0x010802 1675b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1676b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic DEFINE_PCI_DEVICE_TABLE(nvme_id_table) = { 1677b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, 1678b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { 0, } 1679b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1680b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_DEVICE_TABLE(pci, nvme_id_table); 1681b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1682b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct pci_driver nvme_driver = { 1683b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .name = "nvme", 1684b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .id_table = nvme_id_table, 1685b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .probe = nvme_probe, 1686b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .remove = __devexit_p(nvme_remove), 1687b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .suspend = nvme_suspend, 1688b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_resume, 1689b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .err_handler = &nvme_err_handler, 1690b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1691b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1692b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __init nvme_init(void) 1693b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 16941fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox int result = -EBUSY; 16951fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 16961fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); 16971fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (IS_ERR(nvme_thread)) 16981fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return PTR_ERR(nvme_thread); 1699b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1700b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_major = register_blkdev(nvme_major, "nvme"); 1701b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (nvme_major <= 0) 17021fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto kill_kthread; 1703b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1704b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = pci_register_driver(&nvme_driver); 17051fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (result) 17061fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto unregister_blkdev; 17071fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 1708b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 17091fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox unregister_blkdev: 1710b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 17111fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kill_kthread: 17121fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 1713b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1714b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1715b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1716b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void __exit nvme_exit(void) 1717b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1718b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_unregister_driver(&nvme_driver); 1719b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 17201fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 1721b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1722b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1723b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); 1724b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_LICENSE("GPL"); 1725ce38c149576fd0a3360fec3bef4012212d42e736Matthew WilcoxMODULE_VERSION("0.7"); 1726b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_init(nvme_init); 1727b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_exit(nvme_exit); 1728