nvme-core.c revision 1d3520357df99baf4ad89f86268ac96cd38092d9
1b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 2b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * NVM Express device driver 3b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Copyright (c) 2011, Intel Corporation. 4b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 5b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * This program is free software; you can redistribute it and/or modify it 6b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * under the terms and conditions of the GNU General Public License, 7b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * version 2, as published by the Free Software Foundation. 8b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 9b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * This program is distributed in the hope it will be useful, but WITHOUT 10b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * more details. 13b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 14b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * You should have received a copy of the GNU General Public License along with 15b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * this program; if not, write to the Free Software Foundation, Inc., 16b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 17b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 18b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 19b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/nvme.h> 20b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/bio.h> 218de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox#include <linux/bitops.h> 22b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/blkdev.h> 23fd63e9ceeeae58cfe877c2d49d41c1bf7532303cMatthew Wilcox#include <linux/delay.h> 24b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/errno.h> 25b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/fs.h> 26b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/genhd.h> 275aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox#include <linux/idr.h> 28b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/init.h> 29b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/interrupt.h> 30b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/io.h> 31b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/kdev_t.h> 321fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox#include <linux/kthread.h> 33b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/kernel.h> 34b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/mm.h> 35b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/module.h> 36b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/moduleparam.h> 37b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/pci.h> 38be7b62754e097adc0cb16c25c9ee86ee20de62fbMatthew Wilcox#include <linux/poison.h> 39b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/sched.h> 40b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/slab.h> 41b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/types.h> 42b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 43797a796a13df6b84a4791e57306737059b5b2384Hitoshi Mitake#include <asm-generic/io-64-nonatomic-lo-hi.h> 44797a796a13df6b84a4791e57306737059b5b2384Hitoshi Mitake 45b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define NVME_Q_DEPTH 1024 46b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define SQ_SIZE(depth) (depth * sizeof(struct nvme_command)) 47b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion)) 48b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define NVME_MINORS 64 49ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox#define NVME_IO_TIMEOUT (5 * HZ) 50e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox#define ADMIN_TIMEOUT (60 * HZ) 51b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 52b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_major; 53b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_param(nvme_major, int, 0); 54b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 5558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic int use_threaded_interrupts; 5658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxmodule_param(use_threaded_interrupts, int, 0); 5758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 581fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic DEFINE_SPINLOCK(dev_list_lock); 591fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic LIST_HEAD(dev_list); 601fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic struct task_struct *nvme_thread; 611fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 62b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 63b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Represents an NVM Express device. Each nvme_dev is a PCI function. 64b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 65b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstruct nvme_dev { 661fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct list_head node; 67b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue **queues; 68b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 __iomem *dbs; 69b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct pci_dev *pci_dev; 70091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct dma_pool *prp_page_pool; 7199802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox struct dma_pool *prp_small_pool; 72b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int instance; 73b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int queue_count; 74f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox int db_stride; 75b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 ctrl_config; 76b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct msix_entry *entry; 77b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_bar __iomem *bar; 78b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct list_head namespaces; 7951814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox char serial[20]; 8051814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox char model[40]; 8151814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox char firmware_rev[8]; 82b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 83b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 84b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 85b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * An NVM Express namespace is equivalent to a SCSI LUN 86b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 87b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstruct nvme_ns { 88b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct list_head list; 89b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 90b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev; 91b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct request_queue *queue; 92b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct gendisk *disk; 93b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 94b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int ns_id; 95b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int lba_shift; 96b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 97b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 98b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 99b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * An NVM Express queue. Each device has at least two (one for admin 100b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * commands and one for I/O commands). 101b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 102b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstruct nvme_queue { 103b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *q_dmadev; 104091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct nvme_dev *dev; 105b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spinlock_t q_lock; 106b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command *sq_cmds; 107b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox volatile struct nvme_completion *cqes; 108b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t sq_dma_addr; 109b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t cq_dma_addr; 110b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wait_queue_head_t sq_full; 1111fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox wait_queue_t sq_cong_wait; 112b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio_list sq_cong; 113b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 __iomem *q_db; 114b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 q_depth; 115b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 cq_vector; 116b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 sq_head; 117b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 sq_tail; 118b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 cq_head; 119821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox u16 cq_phase; 120b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long cmdid_data[]; 121b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 122b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 123b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 124b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Check we didin't inadvertently grow the command struct 125b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 126b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic inline void _nvme_check_size(void) 127b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 128b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_rw_command) != 64); 129b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_cq) != 64); 130b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64); 131b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64); 132b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_features) != 64); 133b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_command) != 64); 134b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096); 135b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096); 136b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox BUILD_BUG_ON(sizeof(struct nvme_lba_range_type) != 64); 137b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 138b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1395c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxtypedef void (*nvme_completion_fn)(struct nvme_dev *, void *, 140c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *); 141c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 142e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstruct nvme_cmd_info { 143c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 144c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 145e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox unsigned long timeout; 146e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox}; 147e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 148e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcoxstatic struct nvme_cmd_info *nvme_cmd_info(struct nvme_queue *nvmeq) 149e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox{ 150e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return (void *)&nvmeq->cmdid_data[BITS_TO_LONGS(nvmeq->q_depth)]; 151e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox} 152e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox 153b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 154714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * alloc_cmdid() - Allocate a Command ID 155714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @nvmeq: The queue that will be used for this command 156714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * @ctx: A pointer that will be passed to the handler 157c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox * @handler: The function to call on completion 158b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 159b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Allocate a Command ID for a queue. The data passed in will 160b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * be passed to the completion handler. This is implemented by using 161b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the bottom two bits of the ctx pointer to store the handler ID. 162b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Passing in a pointer that's not 4-byte aligned will cause a BUG. 163b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * We can change this if it becomes a problem. 164184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * 165184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * May be called with local interrupts disabled and the q_lock held, 166184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * or with interrupts enabled and no locks held. 167b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 168c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic int alloc_cmdid(struct nvme_queue *nvmeq, void *ctx, 169c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 170b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 171e6d15f79f997a98b3a69abbc462fc9041cc1a7b4Matthew Wilcox int depth = nvmeq->q_depth - 1; 172e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 173b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 174b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 175b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox do { 176b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdid = find_first_zero_bit(nvmeq->cmdid_data, depth); 177b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid >= depth) 178b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EBUSY; 179b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } while (test_and_set_bit(cmdid, nvmeq->cmdid_data)); 180b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 181c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = handler; 182c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].ctx = ctx; 183e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].timeout = jiffies + timeout; 184b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 185b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 186b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 187b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int alloc_cmdid_killable(struct nvme_queue *nvmeq, void *ctx, 188c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn handler, unsigned timeout) 189b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 190b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 191b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wait_event_killable(nvmeq->sq_full, 192e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox (cmdid = alloc_cmdid(nvmeq, ctx, handler, timeout)) >= 0); 193b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return (cmdid < 0) ? -EINTR : cmdid; 194b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 195b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 196c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox/* Special values must be less than 0x1000 */ 197c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox#define CMD_CTX_BASE ((void *)POISON_POINTER_DELTA) 198d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_CANCELLED (0x30C + CMD_CTX_BASE) 199d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_COMPLETED (0x310 + CMD_CTX_BASE) 200d2d8703481f60d67f49e3177196cbe474b11377cMatthew Wilcox#define CMD_CTX_INVALID (0x314 + CMD_CTX_BASE) 20100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox#define CMD_CTX_FLUSH (0x318 + CMD_CTX_BASE) 202be7b62754e097adc0cb16c25c9ee86ee20de62fbMatthew Wilcox 2035c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void special_completion(struct nvme_dev *dev, void *ctx, 204c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 205c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 206c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_CANCELLED) 207c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 208c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_FLUSH) 209c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 210c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_COMPLETED) { 2115c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, 212c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "completed id %d twice on queue %d\n", 213c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 214c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 215c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 216c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (ctx == CMD_CTX_INVALID) { 2175c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, 218c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox "invalid id %d completed on queue %d\n", 219c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cqe->command_id, le16_to_cpup(&cqe->sq_id)); 220c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return; 221c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 222c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 2235c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox dev_warn(&dev->pci_dev->dev, "Unknown special completion %p\n", ctx); 224c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 225c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 226184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 227184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 228184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 229c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *free_cmdid(struct nvme_queue *nvmeq, int cmdid, 230c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 231b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 232c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 233e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 234b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 235c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (cmdid >= nvmeq->q_depth) { 236c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = special_completion; 23748e3d39816416b3bf03dee3a796c0c04427c1a31Matthew Wilcox return CMD_CTX_INVALID; 238c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox } 239c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = info[cmdid].fn; 240c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 241c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 242e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_COMPLETED; 243b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox clear_bit(cmdid, nvmeq->cmdid_data); 244b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox wake_up(&nvmeq->sq_full); 245c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 246b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 247b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 248c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstatic void *cancel_cmdid(struct nvme_queue *nvmeq, int cmdid, 249c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn *fn) 2503c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 251c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 252e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 253c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox if (fn) 254c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox *fn = info[cmdid].fn; 255c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = info[cmdid].ctx; 256c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox info[cmdid].fn = special_completion; 257e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox info[cmdid].ctx = CMD_CTX_CANCELLED; 258c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox return ctx; 2593c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 2603c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 261040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcoxstatic struct nvme_queue *get_nvmeq(struct nvme_dev *dev) 262b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 263040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox return dev->queues[get_cpu() + 1]; 264b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 265b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 266b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void put_nvmeq(struct nvme_queue *nvmeq) 267b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 2681b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox put_cpu(); 269b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 270b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 271b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/** 272714a7a22884b74862540bc84955274d86b2f6040Matthew Wilcox * nvme_submit_cmd() - Copy a command into a queue and ring the doorbell 273b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @nvmeq: The queue to use 274b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * @cmd: The command to send 275b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 276b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Safe to use from interrupt context 277b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 278b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd) 279b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 280b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long flags; 281b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 tail; 282b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_irqsave(&nvmeq->q_lock, flags); 283b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = nvmeq->sq_tail; 284b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memcpy(&nvmeq->sq_cmds[tail], cmd, sizeof(*cmd)); 285b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++tail == nvmeq->q_depth) 286b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox tail = 0; 2877547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(tail, nvmeq->q_db); 288b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = tail; 289b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_unlock_irqrestore(&nvmeq->q_lock, flags); 290b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 291b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 292b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 293b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 294eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox/* 295eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * The nvme_iod describes the data in an I/O, including the list of PRP 296eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * entries. You can't see it in this data structure because C doesn't let 297eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * me express that. Use nvme_alloc_iod to ensure there's enough space 298eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * allocated to store the PRP list. 299eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox */ 300eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstruct nvme_iod { 301eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox void *private; /* For the use of the submitter of the I/O */ 302eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int npages; /* In the PRP list. 0 means small pool in use */ 303eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int offset; /* Of PRP list */ 304eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int nents; /* Used in scatterlist */ 305eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int length; /* Of data, in bytes */ 306e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr_t first_dma; 307eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct scatterlist sg[0]; 308e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews}; 309e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 310eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic __le64 **iod_list(struct nvme_iod *iod) 311e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews{ 312eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ((void *)iod) + iod->offset; 313e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews} 314e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 315eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox/* 316eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * Will slightly overestimate the number of pages needed. This is OK 317eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * as it only leads to a small amount of wasted memory for the lifetime of 318eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox * the I/O. 319eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox */ 320eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic int nvme_npages(unsigned size) 321eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox{ 322eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned nprps = DIV_ROUND_UP(size + PAGE_SIZE, PAGE_SIZE); 323eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return DIV_ROUND_UP(8 * nprps, PAGE_SIZE - 8); 324eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox} 325b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 326eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic struct nvme_iod * 327eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxnvme_alloc_iod(unsigned nseg, unsigned nbytes, gfp_t gfp) 328b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 329eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = kmalloc(sizeof(struct nvme_iod) + 330eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(__le64 *) * nvme_npages(nbytes) + 331eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sizeof(struct scatterlist) * nseg, gfp); 332eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 333eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod) { 334eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->offset = offsetof(struct nvme_iod, sg[nseg]); 335eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 336eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->length = nbytes; 337eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 338eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 339eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 340b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 341b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 342eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod) 343b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 344eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox const int last_prp = PAGE_SIZE / 8 - 1; 345eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int i; 346eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 347eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t prp_dma = iod->first_dma; 348eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 349eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (iod->npages == 0) 350eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_small_pool, list[0], prp_dma); 351eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox for (i = 0; i < iod->npages; i++) { 352eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 *prp_list = list[i]; 353eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_addr_t next_prp_dma = le64_to_cpu(prp_list[last_prp]); 354eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_pool_free(dev->prp_page_pool, prp_list, prp_dma); 355eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox prp_dma = next_prp_dma; 356eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox } 357eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 358b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 359b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 3605c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void requeue_bio(struct nvme_dev *dev, struct bio *bio) 3615c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox{ 3625c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox struct nvme_queue *nvmeq = get_nvmeq(dev); 3635c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 3645c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 3655c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox bio_list_add(&nvmeq->sq_cong, bio); 3665c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox put_nvmeq(nvmeq); 3675c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox wake_up_process(nvme_thread); 3685c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox} 3695c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox 3705c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void bio_completion(struct nvme_dev *dev, void *ctx, 371b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion *cqe) 372b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 373eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod = ctx; 374eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct bio *bio = iod->private; 375b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 status = le16_to_cpup(&cqe->status) >> 1; 376b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 377eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 378b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_data_dir(bio) ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 379eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 38009a58f536436efed02ead722e835cb4ce7674afcMatthew Wilcox if (status) { 3811ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, -EIO); 38209a58f536436efed02ead722e835cb4ce7674afcMatthew Wilcox } else if (bio->bi_vcnt > bio->bi_idx) { 3835c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox requeue_bio(dev, bio); 3841ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox } else { 3851ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio_endio(bio, 0); 3861ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox } 387b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 388b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 389184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* length is in bytes. gfp flags indicates whether we may sleep. */ 390eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic int nvme_setup_prps(struct nvme_dev *dev, 391eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_common_command *cmd, struct nvme_iod *iod, 392eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int total_len, gfp_t gfp) 393ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox{ 39499802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox struct dma_pool *pool; 395eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int length = total_len; 396eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct scatterlist *sg = iod->sg; 397ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int dma_len = sg_dma_len(sg); 398ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox u64 dma_addr = sg_dma_address(sg); 399ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox int offset = offset_in_page(dma_addr); 400e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *prp_list; 401eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox __le64 **list = iod_list(iod); 402e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr_t prp_dma; 403eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int nprps, i; 404ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 405ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmd->prp1 = cpu_to_le64(dma_addr); 406ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox length -= (PAGE_SIZE - offset); 407ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= 0) 408eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 409ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 410ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len -= (PAGE_SIZE - offset); 411ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (dma_len) { 412ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr += (PAGE_SIZE - offset); 413ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } else { 414ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox sg = sg_next(sg); 415ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_addr = sg_dma_address(sg); 416ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox dma_len = sg_dma_len(sg); 417ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 418ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 419ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox if (length <= PAGE_SIZE) { 420ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmd->prp2 = cpu_to_le64(dma_addr); 421eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 422e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 423e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews 424e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews nprps = DIV_ROUND_UP(length, PAGE_SIZE); 42599802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (nprps <= (256 / 8)) { 42699802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_small_pool; 427eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 0; 42899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } else { 42999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox pool = dev->prp_page_pool; 430eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = 1; 43199802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 43299802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 433b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 434b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (!prp_list) { 435b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox cmd->prp2 = cpu_to_le64(dma_addr); 436eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->npages = -1; 437eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return (total_len - length) + PAGE_SIZE; 438b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox } 439eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[0] = prp_list; 440eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->first_dma = prp_dma; 441e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews cmd->prp2 = cpu_to_le64(prp_dma); 442e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews i = 0; 443e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews for (;;) { 4447523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox if (i == PAGE_SIZE / 8) { 445e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews __le64 *old_prp_list = prp_list; 446b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox prp_list = dma_pool_alloc(pool, gfp, &prp_dma); 447eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!prp_list) 448eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len - length; 449eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox list[iod->npages++] = prp_list; 4507523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox prp_list[0] = old_prp_list[i - 1]; 4517523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox old_prp_list[i - 1] = cpu_to_le64(prp_dma); 4527523d834dd1573610078eb1ac0933f6490232f90Matthew Wilcox i = 1; 453e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews } 454e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews prp_list[i++] = cpu_to_le64(dma_addr); 455e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len -= PAGE_SIZE; 456e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr += PAGE_SIZE; 457e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews length -= PAGE_SIZE; 458e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (length <= 0) 459e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews break; 460e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews if (dma_len > 0) 461e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews continue; 462e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews BUG_ON(dma_len < 0); 463e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews sg = sg_next(sg); 464e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_addr = sg_dma_address(sg); 465e025344c56e08b155f43ea09647969286c78377cShane Michael Matthews dma_len = sg_dma_len(sg); 466ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox } 467ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 468eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return total_len; 469ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox} 470ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox 4711ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox/* NVMe scatterlists require no holes in the virtual address */ 4721ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox#define BIOVEC_NOT_VIRT_MERGEABLE(vec1, vec2) ((vec2)->bv_offset || \ 4731ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox (((vec1)->bv_offset + (vec1)->bv_len) % PAGE_SIZE)) 4741ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox 475eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic int nvme_map_bio(struct device *dev, struct nvme_iod *iod, 476b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio, enum dma_data_direction dma_dir, int psegs) 477b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 478768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox struct bio_vec *bvec, *bvprv = NULL; 479768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox struct scatterlist *sg = NULL; 4801ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox int i, old_idx, length = 0, nsegs = 0; 481b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 482eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg_init_table(iod->sg, psegs); 4831ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox old_idx = bio->bi_idx; 484b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_for_each_segment(bvec, bio, i) { 485768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox if (bvprv && BIOVEC_PHYS_MERGEABLE(bvprv, bvec)) { 486768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg->length += bvec->bv_len; 487768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } else { 4881ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox if (bvprv && BIOVEC_NOT_VIRT_MERGEABLE(bvprv, bvec)) 4891ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox break; 490eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = sg ? sg + 1 : iod->sg; 491768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_set_page(sg, bvec->bv_page, bvec->bv_len, 492768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvec->bv_offset); 493768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox nsegs++; 494768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox } 4951ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox length += bvec->bv_len; 496768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox bvprv = bvec; 497b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 4981ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio->bi_idx = i; 499eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->nents = nsegs; 500768308400f5b4ce665a072eb976a851978b7706eMatthew Wilcox sg_mark_end(sg); 501eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (dma_map_sg(dev, iod->sg, iod->nents, dma_dir) == 0) { 5021ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox bio->bi_idx = old_idx; 5031ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return -ENOMEM; 5041ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox } 5051ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox return length; 506b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 507b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 50800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcoxstatic int nvme_submit_flush(struct nvme_queue *nvmeq, struct nvme_ns *ns, 50900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid) 51000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 51100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox struct nvme_command *cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 51200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 51300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 51400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.opcode = nvme_cmd_flush; 51500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.command_id = cmdid; 51600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox cmnd->common.nsid = cpu_to_le32(ns->ns_id); 51700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 51800df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 51900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox nvmeq->sq_tail = 0; 52000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 52100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 52200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return 0; 52300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 52400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 52500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcoxstatic int nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns) 52600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox{ 52700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox int cmdid = alloc_cmdid(nvmeq, (void *)CMD_CTX_FLUSH, 528ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox special_completion, NVME_IO_TIMEOUT); 52900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (unlikely(cmdid < 0)) 53000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return cmdid; 53100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 53200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 53300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox} 53400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 535184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox/* 536184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox * Called with local interrupts disabled and the q_lock held. May not sleep. 537184d2944cb3b92a2e8e1733c59d1e531ad6e924aMatthew Wilcox */ 538b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_bio_queue(struct nvme_queue *nvmeq, struct nvme_ns *ns, 539b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct bio *bio) 540b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 541ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox struct nvme_command *cmnd; 542eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 543b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox enum dma_data_direction dma_dir; 5441ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox int cmdid, length, result = -ENOMEM; 545b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u16 control; 546b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 dsmgmt; 547b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int psegs = bio_phys_segments(ns->queue, bio); 548b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 54900df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && psegs) { 55000df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox result = nvme_submit_flush_data(nvmeq, ns); 55100df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if (result) 55200df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return result; 55300df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox } 55400df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 555eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(psegs, bio->bi_size, GFP_ATOMIC); 556eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (!iod) 557eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox goto nomem; 558eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod->private = bio; 559b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 560eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox result = -EBUSY; 561ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox cmdid = alloc_cmdid(nvmeq, iod, bio_completion, NVME_IO_TIMEOUT); 562b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (unlikely(cmdid < 0)) 563eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 564b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 56500df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox if ((bio->bi_rw & REQ_FLUSH) && !psegs) 56600df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox return nvme_submit_flush(nvmeq, ns, cmdid); 56700df5cb4eb927078850086f8becc3286a69ea12eMatthew Wilcox 568b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control = 0; 569b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_FUA) 570b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_FUA; 571b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & (REQ_FAILFAST_DEV | REQ_RAHEAD)) 572b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox control |= NVME_RW_LR; 573b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 574b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt = 0; 575b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio->bi_rw & REQ_RAHEAD) 576b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH; 577b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 578ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd = &nvmeq->sq_cmds[nvmeq->sq_tail]; 579b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 580b8deb62cf271fa9381edc8cf52bcae2f0225c55aMatthew Wilcox memset(cmnd, 0, sizeof(*cmnd)); 581b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (bio_data_dir(bio)) { 582ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_write; 583b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_TO_DEVICE; 584b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } else { 585ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.opcode = nvme_cmd_read; 586b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_dir = DMA_FROM_DEVICE; 587b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 588b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 589eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox result = nvme_map_bio(nvmeq->q_dmadev, iod, bio, dma_dir, psegs); 5901ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox if (result < 0) 591eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 5921ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox length = result; 593b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 594ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.command_id = cmdid; 595ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.nsid = cpu_to_le32(ns->ns_id); 596eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(nvmeq->dev, &cmnd->common, iod, length, 597eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_ATOMIC); 598ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.slba = cpu_to_le64(bio->bi_sector >> (ns->lba_shift - 9)); 5991ad2f8932a72bf375361727949ced2cb4e8cfcefMatthew Wilcox cmnd->rw.length = cpu_to_le16((length >> ns->lba_shift) - 1); 600ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.control = cpu_to_le16(control); 601ff22b54fda2078fc3cd1bcdcb7a5ce5d08fd6591Matthew Wilcox cmnd->rw.dsmgmt = cpu_to_le32(dsmgmt); 602b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 603d8ee9d69f275769aaad40ef7c944565ff8d2d24fMatthew Wilcox bio->bi_sector += length >> 9; 604d8ee9d69f275769aaad40ef7c944565ff8d2d24fMatthew Wilcox 605b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++nvmeq->sq_tail == nvmeq->q_depth) 606b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_tail = 0; 6077547881d0951384f9833ec3a80fac8f3f16f3b98Matthew Wilcox writel(nvmeq->sq_tail, nvmeq->q_db); 608b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 6091974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox return 0; 6101974b1ae8852324a75fb8cfecbc7b758fd5a2c3cMatthew Wilcox 611eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 612eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(nvmeq->dev, iod); 613eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox nomem: 614eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox return result; 615b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 616b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 61793c3d65b28bab6da520c2add9cb387a0303f8b2dLinus Torvaldsstatic void nvme_make_request(struct request_queue *q, struct bio *bio) 618b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 619b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = q->queuedata; 620040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox struct nvme_queue *nvmeq = get_nvmeq(ns->dev); 621eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox int result = -EBUSY; 622eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox 623eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 624eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 625eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox result = nvme_submit_bio_queue(nvmeq, ns, bio); 626eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (unlikely(result)) { 627eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 628eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 629b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_add(&nvmeq->sq_cong, bio); 630b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 631eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox 632eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 633b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox put_nvmeq(nvmeq); 634b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 635b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 636b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_process_cq(struct nvme_queue *nvmeq) 637b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 638821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox u16 head, phase; 639b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 640b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = nvmeq->cq_head; 641821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = nvmeq->cq_phase; 642b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 643b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (;;) { 644c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 645c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 646b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion cqe = nvmeq->cqes[head]; 647821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != phase) 648b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox break; 649b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_head = le16_to_cpu(cqe.sq_head); 650b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++head == nvmeq->q_depth) { 651b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = 0; 652821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = !phase; 653b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 654b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 655c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = free_cmdid(nvmeq, cqe.command_id, &fn); 6565c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox fn(nvmeq->dev, ctx, &cqe); 657b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 658b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 659b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* If the controller ignores the cq head doorbell and continuously 660b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * writes to the queue, it is theoretically possible to wrap around 661b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the queue twice and mistakenly return IRQ_NONE. Linux only 662b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * requires that 0.1% of your interrupts are handled, so this isn't 663b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * a big problem. 664b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 665821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) 666b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return IRQ_NONE; 667b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 668f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox writel(head, nvmeq->q_db + (1 << nvmeq->dev->db_stride)); 669b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = head; 670821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = phase; 671b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 672b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return IRQ_HANDLED; 673b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 674b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 675b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_irq(int irq, void *data) 676b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 67758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox irqreturn_t result; 67858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 67958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_lock(&nvmeq->q_lock); 68058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox result = nvme_process_cq(nvmeq); 68158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_unlock(&nvmeq->q_lock); 68258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return result; 68358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 68458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 68558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic irqreturn_t nvme_irq_check(int irq, void *data) 68658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox{ 68758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 68858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; 68958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) 69058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_NONE; 69158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_WAKE_THREAD; 69258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 69358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 6943c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcoxstatic void nvme_abort_command(struct nvme_queue *nvmeq, int cmdid) 6953c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 6963c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 697c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cancel_cmdid(nvmeq, cmdid, NULL); 6983c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 6993c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 7003c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 701c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstruct sync_cmd_info { 702c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct task_struct *task; 703c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox u32 result; 704c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox int status; 705c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox}; 706c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 7075c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void sync_completion(struct nvme_dev *dev, void *ctx, 708c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 709c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 710c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct sync_cmd_info *cmdinfo = ctx; 711c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->result = le32_to_cpup(&cqe->result); 712c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; 713c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox wake_up_process(cmdinfo->task); 714c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 715c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 716b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 717b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Returns 0 on success. If the result is negative, it's a Linux error code; 718b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * if the result is positive, it's an NVM Express status code 719b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 7203c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcoxstatic int nvme_submit_sync_cmd(struct nvme_queue *nvmeq, 721e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_command *cmd, u32 *result, unsigned timeout) 722b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 723b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 724b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct sync_cmd_info cmdinfo; 725b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 726b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.task = current; 727b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.status = -EINTR; 728b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 729c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdid = alloc_cmdid_killable(nvmeq, &cmdinfo, sync_completion, 730e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox timeout); 731b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid < 0) 732b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 733b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmd->common.command_id = cmdid; 734b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7353c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox set_current_state(TASK_KILLABLE); 7363c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_submit_cmd(nvmeq, cmd); 737b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox schedule(); 738b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7393c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox if (cmdinfo.status == -EINTR) { 7403c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_abort_command(nvmeq, cmdid); 7413c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox return -EINTR; 7423c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox } 7433c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 744b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 745b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox *result = cmdinfo.result; 746b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 747b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdinfo.status; 748b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 749b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 750b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd, 751b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 *result) 752b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 753e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return nvme_submit_sync_cmd(dev->queues[0], cmd, result, ADMIN_TIMEOUT); 754b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 755b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 756b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) 757b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 758b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 759b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 760b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 761b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 762b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.opcode = opcode; 763b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.qid = cpu_to_le16(id); 764b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 765b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 766b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 767b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 768b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 769b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 770b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 771b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, 772b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 773b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 774b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 775b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 776b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; 777b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 778b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 779b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.opcode = nvme_admin_create_cq; 780b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); 781b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cqid = cpu_to_le16(qid); 782b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 783b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cq_flags = cpu_to_le16(flags); 784b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); 785b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 786b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 787b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 788b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 789b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 790b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 791b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 792b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, 793b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 794b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 795b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 796b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 797b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; 798b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 799b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 800b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.opcode = nvme_admin_create_sq; 801b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); 802b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sqid = cpu_to_le16(qid); 803b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 804b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sq_flags = cpu_to_le16(flags); 805b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.cqid = cpu_to_le16(qid); 806b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 807b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 808b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 809b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 810b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 811b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 812b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 813b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) 814b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 815b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); 816b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 817b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 818b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) 819b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 820b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); 821b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 822b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 823bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcoxstatic int nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns, 824bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox dma_addr_t dma_addr) 825bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 826bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 827bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 828bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 829bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.opcode = nvme_admin_identify; 830bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.nsid = cpu_to_le32(nsid); 831bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.prp1 = cpu_to_le64(dma_addr); 832bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.cns = cpu_to_le32(cns); 833bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 834bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, NULL); 835bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 836bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 837bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcoxstatic int nvme_get_features(struct nvme_dev *dev, unsigned fid, 838df3481399042200792822b6243e36a95a557b57eMatthew Wilcox unsigned dword11, dma_addr_t dma_addr) 839bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 840bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 841bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 842bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 843bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.opcode = nvme_admin_get_features; 844bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 845bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.fid = cpu_to_le32(fid); 846bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.dword11 = cpu_to_le32(dword11); 847bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 848df3481399042200792822b6243e36a95a557b57eMatthew Wilcox return nvme_submit_admin_cmd(dev, &c, NULL); 849df3481399042200792822b6243e36a95a557b57eMatthew Wilcox} 850df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 851df3481399042200792822b6243e36a95a557b57eMatthew Wilcoxstatic int nvme_set_features(struct nvme_dev *dev, unsigned fid, 852df3481399042200792822b6243e36a95a557b57eMatthew Wilcox unsigned dword11, dma_addr_t dma_addr, u32 *result) 853df3481399042200792822b6243e36a95a557b57eMatthew Wilcox{ 854df3481399042200792822b6243e36a95a557b57eMatthew Wilcox struct nvme_command c; 855df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 856df3481399042200792822b6243e36a95a557b57eMatthew Wilcox memset(&c, 0, sizeof(c)); 857df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.opcode = nvme_admin_set_features; 858df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 859df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.fid = cpu_to_le32(fid); 860df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.dword11 = cpu_to_le32(dword11); 861df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 862bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, result); 863bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 864bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 865b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_free_queue(struct nvme_dev *dev, int qid) 866b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 867b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = dev->queues[qid]; 868aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox int vector = dev->entry[nvmeq->cq_vector].vector; 869b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 870aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox irq_set_affinity_hint(vector, NULL); 871aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox free_irq(vector, nvmeq); 872b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 873b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* Don't tell the adapter to delete the admin queue */ 874b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (qid) { 875b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 876b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 877b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 878b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 879b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 880b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 881b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 882b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 883b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 884b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 885b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 886b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, 887b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int depth, int vector) 888b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 889b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 890e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox unsigned extra = (depth / 8) + (depth * sizeof(struct nvme_cmd_info)); 891b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq) + extra, GFP_KERNEL); 892b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq) 893b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 894b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 895b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cqes = dma_alloc_coherent(dmadev, CQ_SIZE(depth), 896b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->cq_dma_addr, GFP_KERNEL); 897b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->cqes) 898b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 899b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset((void *)nvmeq->cqes, 0, CQ_SIZE(depth)); 900b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 901b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds = dma_alloc_coherent(dmadev, SQ_SIZE(depth), 902b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->sq_dma_addr, GFP_KERNEL); 903b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->sq_cmds) 904b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_cqdma; 905b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 906b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_dmadev = dmadev; 907091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvmeq->dev = dev; 908b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_init(&nvmeq->q_lock); 909b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = 0; 910821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = 1; 911b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox init_waitqueue_head(&nvmeq->sq_full); 9121fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox init_waitqueue_entry(&nvmeq->sq_cong_wait, nvme_thread); 913b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_init(&nvmeq->sq_cong); 914f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox nvmeq->q_db = &dev->dbs[qid << (dev->db_stride + 1)]; 915b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_depth = depth; 916b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_vector = vector; 917b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 918b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 919b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 920b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_cqdma: 921b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(dmadev, CQ_SIZE(nvmeq->q_depth), (void *)nvmeq->cqes, 922b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_dma_addr); 923b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 924b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 925b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 926b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 927b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9283001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcoxstatic int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, 9293001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox const char *name) 9303001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox{ 93158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if (use_threaded_interrupts) 93258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, 933ec6ce618d65b5ce1bef83a5509255107a0feac44Matthew Wilcox nvme_irq_check, nvme_irq, 93458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox IRQF_DISABLED | IRQF_SHARED, 93558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox name, nvmeq); 9363001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, 9373001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox IRQF_DISABLED | IRQF_SHARED, name, nvmeq); 9383001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox} 9393001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox 940b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic __devinit struct nvme_queue *nvme_create_queue(struct nvme_dev *dev, 941b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int qid, int cq_size, int vector) 942b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 943b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int result; 944b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = nvme_alloc_queue(dev, qid, cq_size, vector); 945b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9463f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox if (!nvmeq) 9476f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return ERR_PTR(-ENOMEM); 9483f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox 949b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_cq(dev, qid, nvmeq); 950b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 951b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 952b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 953b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_sq(dev, qid, nvmeq); 954b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 955b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_cq; 956b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9573001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme"); 958b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 959b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_sq; 960b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 961b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 962b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 963b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_sq: 964b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 965b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_cq: 966b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 967b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 968b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 969b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 970b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 971b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 972b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 9736f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return ERR_PTR(result); 974b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 975b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 976b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __devinit nvme_configure_admin_queue(struct nvme_dev *dev) 977b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 978b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int result; 979b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 aqa; 98022605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox u64 cap; 98122605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox unsigned long timeout; 982b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq; 983b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 984b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 985b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 986b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq = nvme_alloc_queue(dev, 0, 64, 0); 9873f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox if (!nvmeq) 9883f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox return -ENOMEM; 989b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 990b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa = nvmeq->q_depth - 1; 991b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa |= aqa << 16; 992b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 993b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config = NVME_CC_ENABLE | NVME_CC_CSS_NVM; 994b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= (PAGE_SHIFT - 12) << NVME_CC_MPS_SHIFT; 995b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; 9967f53f9d2424533256ae86f7df5661a17de743de8Matthew Wilcox dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; 997b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9985911f20039ce59d7e7834f0c42151cf759b6f786Shane Michael Matthews writel(0, &dev->bar->cc); 999b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(aqa, &dev->bar->aqa); 1000b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->sq_dma_addr, &dev->bar->asq); 1001b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->cq_dma_addr, &dev->bar->acq); 1002b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(dev->ctrl_config, &dev->bar->cc); 1003b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 100422605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox cap = readq(&dev->bar->cap); 100522605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; 1006f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->db_stride = NVME_CAP_STRIDE(cap); 100722605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox 1008b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox while (!(readl(&dev->bar->csts) & NVME_CSTS_RDY)) { 1009b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox msleep(100); 1010b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (fatal_signal_pending(current)) 1011b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EINTR; 101222605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox if (time_after(jiffies, timeout)) { 101322605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox dev_err(&dev->pci_dev->dev, 101422605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox "Device not ready; aborting initialisation\n"); 101522605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox return -ENODEV; 101622605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox } 1017b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1018b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10193001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme admin"); 1020b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->queues[0] = nvmeq; 1021b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1022b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1023b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1024eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write, 1025eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned long addr, unsigned length) 1026b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 102736c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox int i, err, count, nents, offset; 10287fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct scatterlist *sg; 10297fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct page **pages; 1030eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 103136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 103236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (addr & 3) 1033eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 10347fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox if (!length) 1035eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 10367fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 103736c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox offset = offset_in_page(addr); 10387fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox count = DIV_ROUND_UP(offset + length, PAGE_SIZE); 10397fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox pages = kcalloc(count, sizeof(*pages), GFP_KERNEL); 104036c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 104136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = get_user_pages_fast(addr, count, 1, pages); 104236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (err < count) { 104336c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox count = err; 104436c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = -EFAULT; 104536c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox goto put_pages; 104636c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox } 10477fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 1048eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(count, length, GFP_KERNEL); 1049eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = iod->sg; 105036c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox sg_init_table(sg, count); 1051d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox for (i = 0; i < count; i++) { 1052d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox sg_set_page(&sg[i], pages[i], 1053d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox min_t(int, length, PAGE_SIZE - offset), offset); 1054d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox length -= (PAGE_SIZE - offset); 1055d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox offset = 0; 10567fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox } 1057fe304c43c6d63e29ed4fc46a874d7a74313788c5Matthew Wilcox sg_mark_end(&sg[i - 1]); 10581c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox iod->nents = count; 10597fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 10607fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox err = -ENOMEM; 10617fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox nents = dma_map_sg(&dev->pci_dev->dev, sg, count, 10627fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 106336c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (!nents) 1064eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 1065b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10667fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1067eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 1068b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1069eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 1070eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 10717fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_pages: 10727fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox for (i = 0; i < count; i++) 10737fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_page(pages[i]); 10747fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1075eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(err); 10767fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1077b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10787fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcoxstatic void nvme_unmap_user_pages(struct nvme_dev *dev, int write, 10791c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox struct nvme_iod *iod) 10807fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox{ 10811c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox int i; 1082b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10831c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 10841c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 10857fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 10861c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox for (i = 0; i < iod->nents; i++) 10871c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox put_page(sg_page(&iod->sg[i])); 10887fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1089b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1090a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcoxstatic int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) 1091a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox{ 1092a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_dev *dev = ns->dev; 1093a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_queue *nvmeq; 1094a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_user_io io; 1095a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_command c; 1096a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox unsigned length; 1097eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int status; 1098eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 1099a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1100a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox if (copy_from_user(&io, uio, sizeof(io))) 1101a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return -EFAULT; 11026c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox length = (io.nblocks + 1) << ns->lba_shift; 11036c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 11046c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox switch (io.opcode) { 11056c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_write: 11066c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_read: 11076bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case nvme_cmd_compare: 1108eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_map_user_pages(dev, io.opcode & 1, io.addr, length); 11096413214c5d424fd5aae6567848340f962ad2ce0fMatthew Wilcox break; 11106c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox default: 11116bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EINVAL; 11126c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox } 11136c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 1114eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1115eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1116a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1117a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox memset(&c, 0, sizeof(c)); 1118a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.opcode = io.opcode; 1119a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.flags = io.flags; 11206c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.nsid = cpu_to_le32(ns->ns_id); 1121a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.slba = cpu_to_le64(io.slba); 11226c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.length = cpu_to_le16(io.nblocks); 1123a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.control = cpu_to_le16(io.control); 1124a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.dsmgmt = cpu_to_le16(io.dsmgmt); 11256c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.reftag = io.reftag; 11266c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.apptag = io.apptag; 11276c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.appmask = io.appmask; 1128a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox /* XXX: metadata */ 1129eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, GFP_KERNEL); 1130a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1131040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox nvmeq = get_nvmeq(dev); 1132fa92282149842645931580225647238428374758Matthew Wilcox /* 1133fa92282149842645931580225647238428374758Matthew Wilcox * Since nvme_submit_sync_cmd sleeps, we can't keep preemption 1134b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * disabled. We may be preempted at any point, and be rescheduled 1135b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * to a different CPU. That will cause cacheline bouncing, but no 1136b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * additional races since q_lock already protects against other CPUs. 1137b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox */ 1138a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox put_nvmeq(nvmeq); 1139b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (length != (io.nblocks + 1) << ns->lba_shift) 1140b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1141b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 1142ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox status = nvme_submit_sync_cmd(nvmeq, &c, NULL, NVME_IO_TIMEOUT); 1143a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 11441c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, io.opcode & 1, iod); 1145eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 1146a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return status; 1147a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox} 1148a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 11496bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcoxstatic int nvme_user_admin_cmd(struct nvme_ns *ns, 11506bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd __user *ucmd) 11516ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox{ 11526ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox struct nvme_dev *dev = ns->dev; 11536bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd cmd; 11546ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox struct nvme_command c; 1155eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int status, length; 1156eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 11576ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 11586bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (!capable(CAP_SYS_ADMIN)) 11596bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EACCES; 11606bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (copy_from_user(&cmd, ucmd, sizeof(cmd))) 11616ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return -EFAULT; 11626ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 11636ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox memset(&c, 0, sizeof(c)); 11646bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.opcode = cmd.opcode; 11656bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.flags = cmd.flags; 11666bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.nsid = cpu_to_le32(cmd.nsid); 11676bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); 11686bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); 11696bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); 11706bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); 11716bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); 11726bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); 11736bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); 11746bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); 11756bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 11766bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox length = cmd.data_len; 11776bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 1178497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox iod = nvme_map_user_pages(dev, cmd.opcode & 1, cmd.addr, 1179497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox length); 1180eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1181eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1182eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, 1183eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_KERNEL); 11846bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 11856bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 11866bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (length != cmd.data_len) 1187b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1188b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 1189b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 1190eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 11916bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 11921c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, cmd.opcode & 1, iod); 1193eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 11946bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 11956ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return status; 11966ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox} 11976ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 1198b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, 1199b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long arg) 1200b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1201b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = bdev->bd_disk->private_data; 1202b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1203b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox switch (cmd) { 12046bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ID: 12056bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return ns->ns_id; 12066bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ADMIN_CMD: 12076bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return nvme_user_admin_cmd(ns, (void __user *)arg); 1208a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox case NVME_IOCTL_SUBMIT_IO: 1209a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return nvme_submit_io(ns, (void __user *)arg); 1210b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox default: 1211b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOTTY; 1212b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1213b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1214b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1215b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic const struct block_device_operations nvme_fops = { 1216b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .owner = THIS_MODULE, 1217b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .ioctl = nvme_ioctl, 12184948168280b269a514045766ddd872cfac5968e1Matthew Wilcox .compat_ioctl = nvme_ioctl, 1219b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1220b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12218de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcoxstatic void nvme_timeout_ios(struct nvme_queue *nvmeq) 12228de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox{ 12238de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox int depth = nvmeq->q_depth - 1; 12248de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 12258de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox unsigned long now = jiffies; 12268de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox int cmdid; 12278de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox 12288de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox for_each_set_bit(cmdid, nvmeq->cmdid_data, depth) { 1229c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 1230c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 12318de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox static struct nvme_completion cqe = { .status = cpu_to_le16(NVME_SC_ABORT_REQ) << 1, }; 12328de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox 12338de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox if (!time_after(now, info[cmdid].timeout)) 12348de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox continue; 12358de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox dev_warn(nvmeq->q_dmadev, "Timing out I/O %d\n", cmdid); 1236c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = cancel_cmdid(nvmeq, cmdid, &fn); 12375c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox fn(nvmeq->dev, ctx, &cqe); 12388de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox } 12398de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox} 12408de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox 12411fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic void nvme_resubmit_bios(struct nvme_queue *nvmeq) 12421fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 12431fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (bio_list_peek(&nvmeq->sq_cong)) { 12441fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 12451fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_ns *ns = bio->bi_bdev->bd_disk->private_data; 12461fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_submit_bio_queue(nvmeq, ns, bio)) { 12471fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox bio_list_add_head(&nvmeq->sq_cong, bio); 12481fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox break; 12491fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 12503cb967c03926edd2c414082f4cc0feb7b372edaeMatthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 12513cb967c03926edd2c414082f4cc0feb7b372edaeMatthew Wilcox remove_wait_queue(&nvmeq->sq_full, 12523cb967c03926edd2c414082f4cc0feb7b372edaeMatthew Wilcox &nvmeq->sq_cong_wait); 12531fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 12541fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 12551fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 12561fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic int nvme_kthread(void *data) 12571fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 12581fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_dev *dev; 12591fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 12601fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (!kthread_should_stop()) { 12611fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox __set_current_state(TASK_RUNNING); 12621fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 12631fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_for_each_entry(dev, &dev_list, node) { 12641fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox int i; 12651fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox for (i = 0; i < dev->queue_count; i++) { 12661fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_queue *nvmeq = dev->queues[i]; 1267740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (!nvmeq) 1268740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox continue; 12691fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 12701fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_process_cq(nvmeq)) 12711fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox printk("process_cq did something\n"); 12728de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox nvme_timeout_ios(nvmeq); 12731fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_resubmit_bios(nvmeq); 12741fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 12751fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 12761fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 12771fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 12781fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox set_current_state(TASK_INTERRUPTIBLE); 12791fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox schedule_timeout(HZ); 12801fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 12811fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 12821fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 12831fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 12845aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic DEFINE_IDA(nvme_index_ida); 12855aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 12865aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic int nvme_get_ns_idx(void) 12875aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox{ 12885aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox int index, error; 12895aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 12905aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox do { 12915aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox if (!ida_pre_get(&nvme_index_ida, GFP_KERNEL)) 12925aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox return -1; 12935aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 12945aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_lock(&dev_list_lock); 12955aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox error = ida_get_new(&nvme_index_ida, &index); 12965aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_unlock(&dev_list_lock); 12975aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox } while (error == -EAGAIN); 12985aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 12995aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox if (error) 13005aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox index = -1; 13015aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox return index; 13025aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox} 13035aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 13045aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic void nvme_put_ns_idx(int index) 13055aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox{ 13065aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_lock(&dev_list_lock); 13075aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ida_remove(&nvme_index_ida, index); 13085aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_unlock(&dev_list_lock); 13095aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox} 13105aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 13115aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, int nsid, 1312b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_id_ns *id, struct nvme_lba_range_type *rt) 1313b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1314b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns; 1315b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct gendisk *disk; 1316b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int lbaf; 1317b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1318b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (rt->attributes & NVME_LBART_ATTRIB_HIDE) 1319b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1320b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1321b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns = kzalloc(sizeof(*ns), GFP_KERNEL); 1322b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns) 1323b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1324b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue = blk_alloc_queue(GFP_KERNEL); 1325b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns->queue) 1326b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_ns; 13274eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox ns->queue->queue_flags = QUEUE_FLAG_DEFAULT; 13284eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue); 13294eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); 13304eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox/* queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); */ 1331b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_queue_make_request(ns->queue, nvme_make_request); 1332b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->dev = dev; 1333b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue->queuedata = ns; 1334b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1335b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk = alloc_disk(NVME_MINORS); 1336b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!disk) 1337b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_queue; 13385aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ns->ns_id = nsid; 1339b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->disk = disk; 1340b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox lbaf = id->flbas & 0xf; 1341b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->lba_shift = id->lbaf[lbaf].ds; 1342b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1343b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->major = nvme_major; 1344b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->minors = NVME_MINORS; 13455aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox disk->first_minor = NVME_MINORS * nvme_get_ns_idx(); 1346b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->fops = &nvme_fops; 1347b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->private_data = ns; 1348b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->queue = ns->queue; 1349388f037f4e7f0a24bac6b1a24f144f5d939f58cfMatthew Wilcox disk->driverfs_dev = &dev->pci_dev->dev; 13505aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox sprintf(disk->disk_name, "nvme%dn%d", dev->instance, nsid); 1351b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); 1352b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1353b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return ns; 1354b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1355b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_queue: 1356b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1357b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_ns: 1358b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1359b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1360b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1361b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1362b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_ns_free(struct nvme_ns *ns) 1363b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 13645aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox int index = ns->disk->first_minor / NVME_MINORS; 1365b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox put_disk(ns->disk); 13665aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox nvme_put_ns_idx(index); 1367b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1368b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1369b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1370b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1371b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcoxstatic int set_queue_count(struct nvme_dev *dev, int count) 1372b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1373b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 1374b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 result; 1375b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcox u32 q_count = (count - 1) | ((count - 1) << 16); 1376b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1377df3481399042200792822b6243e36a95a557b57eMatthew Wilcox status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0, 1378bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox &result); 1379b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 1380b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 1381b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return min(result & 0xffff, result >> 16) + 1; 1382b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1383b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1384b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __devinit nvme_setup_io_queues(struct nvme_dev *dev) 1385b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1386f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox int result, cpu, i, nr_io_queues, db_bar_size; 1387b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1388b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = num_online_cpus(); 1389b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox result = set_queue_count(dev, nr_io_queues); 13901b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox if (result < 0) 13911b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox return result; 1392b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox if (result < nr_io_queues) 1393b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = result; 1394b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 13951b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox /* Deregister the admin queue's interrupt */ 13961b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox free_irq(dev->entry[0].vector, dev->queues[0]); 13971b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1398f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox db_bar_size = 4096 + ((nr_io_queues + 1) << (dev->db_stride + 3)); 1399f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox if (db_bar_size > 8192) { 1400f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox iounmap(dev->bar); 1401f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->bar = ioremap(pci_resource_start(dev->pci_dev, 0), 1402f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox db_bar_size); 1403f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 1404f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->queues[0]->q_db = dev->dbs; 1405f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox } 1406f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox 1407b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) 14081b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->entry[i].entry = i; 14091b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox for (;;) { 1410b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox result = pci_enable_msix(dev->pci_dev, dev->entry, 1411b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues); 14121b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox if (result == 0) { 14131b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox break; 14141b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } else if (result > 0) { 1415b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = result; 14161b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox continue; 14171b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } else { 1418b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = 1; 14191b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox break; 14201b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 14211b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 14221b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 14231b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox result = queue_request_irq(dev, dev->queues[0], "nvme admin"); 14241b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox /* XXX: handle failure here */ 14251b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 14261b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_first(cpu_online_mask); 1427b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) { 14281b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox irq_set_affinity_hint(dev->entry[i].vector, get_cpu_mask(cpu)); 14291b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_next(cpu, cpu_online_mask); 14301b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 14311b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1432b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) { 14331b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queues[i + 1] = nvme_create_queue(dev, i + 1, 14341b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox NVME_Q_DEPTH, i); 14356f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox if (IS_ERR(dev->queues[i + 1])) 14366f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return PTR_ERR(dev->queues[i + 1]); 14371b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queue_count++; 14381b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 1439b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14409ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox for (; i < num_possible_cpus(); i++) { 14419ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox int target = i % rounddown_pow_of_two(dev->queue_count - 1); 14429ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox dev->queues[i + 1] = dev->queues[target + 1]; 14439ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox } 14449ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox 1445b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1446b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1447b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1448b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_free_queues(struct nvme_dev *dev) 1449b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1450b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int i; 1451b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1452b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (i = dev->queue_count - 1; i >= 0; i--) 1453b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queue(dev, i); 1454b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1455b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1456b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __devinit nvme_dev_add(struct nvme_dev *dev) 1457b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1458b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int res, nn, i; 1459b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns, *next; 146051814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox struct nvme_id_ctrl *ctrl; 1461bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_id_ns *id_ns; 1462bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox void *mem; 1463b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t dma_addr; 1464b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1465b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = nvme_setup_io_queues(dev); 1466b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1467b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 1468b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1469bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox mem = dma_alloc_coherent(&dev->pci_dev->dev, 8192, &dma_addr, 1470b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 1471b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1472bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, 0, 1, dma_addr); 1473b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) { 1474b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = -EIO; 1475b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free; 1476b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1477b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1478bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ctrl = mem; 147951814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox nn = le32_to_cpup(&ctrl->nn); 148051814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn)); 148151814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn)); 148251814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr)); 1483b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1484bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox id_ns = mem; 14852b2c1896871838cdf549442e8ad0264be5fa74e3Matthew Wilcox for (i = 1; i <= nn; i++) { 1486bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, i, 0, dma_addr); 1487b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1488b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1489b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1490bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox if (id_ns->ncap == 0) 1491b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1492b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1493bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_get_features(dev, NVME_FEAT_LBA_RANGE, i, 1494df3481399042200792822b6243e36a95a557b57eMatthew Wilcox dma_addr + 4096); 1495b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1496b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1497b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1498bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ns = nvme_alloc_ns(dev, i, mem, mem + 4096); 1499b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (ns) 1500b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_add_tail(&ns->list, &dev->namespaces); 1501b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1502b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry(ns, &dev->namespaces, list) 1503b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox add_disk(ns->disk); 1504b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1505bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox goto out; 1506b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1507b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free: 1508b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 1509b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_del(&ns->list); 1510b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_ns_free(ns); 1511b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1512b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1513bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox out: 1514684f5c2025b067a23722e620d0b3b858d8dc5d01Matthew Wilcox dma_free_coherent(&dev->pci_dev->dev, 8192, mem, dma_addr); 1515b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 1516b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1517b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1518b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_dev_remove(struct nvme_dev *dev) 1519b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1520b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns, *next; 1521b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 15221fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 15231fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_del(&dev->node); 15241fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 15251fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 1526b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* TODO: wait all I/O finished or cancel them */ 1527b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1528b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 1529b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_del(&ns->list); 1530b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox del_gendisk(ns->disk); 1531b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_ns_free(ns); 1532b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1533b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1534b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queues(dev); 1535b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1536b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1537b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1538b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1539091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic int nvme_setup_prp_pools(struct nvme_dev *dev) 1540091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 1541091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 1542091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dev->prp_page_pool = dma_pool_create("prp list page", dmadev, 1543091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox PAGE_SIZE, PAGE_SIZE, 0); 1544091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (!dev->prp_page_pool) 1545091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return -ENOMEM; 1546091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 154799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox /* Optimisation for I/Os between 4k and 128k */ 154899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dev->prp_small_pool = dma_pool_create("prp list 256", dmadev, 154999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 256, 256, 0); 155099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (!dev->prp_small_pool) { 155199802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 155299802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox return -ENOMEM; 155399802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 1554091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return 0; 1555091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 1556091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1557091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic void nvme_release_prp_pools(struct nvme_dev *dev) 1558091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 1559091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 156099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_small_pool); 1561091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 1562091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1563b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* XXX: Use an ida or something to let remove / add work correctly */ 1564b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_set_instance(struct nvme_dev *dev) 1565b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1566b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox static int instance; 1567b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->instance = instance++; 1568b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1569b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1570b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_release_instance(struct nvme_dev *dev) 1571b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1572b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1573b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1574b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __devinit nvme_probe(struct pci_dev *pdev, 1575b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox const struct pci_device_id *id) 1576b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1577574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox int bars, result = -ENOMEM; 1578b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev; 1579b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1580b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev = kzalloc(sizeof(*dev), GFP_KERNEL); 1581b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev) 1582b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOMEM; 1583b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->entry = kcalloc(num_possible_cpus(), sizeof(*dev->entry), 1584b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 1585b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->entry) 1586b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 15871b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queues = kcalloc(num_possible_cpus() + 1, sizeof(void *), 15881b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox GFP_KERNEL); 1589b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->queues) 1590b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 1591b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 15920ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews if (pci_enable_device_mem(pdev)) 15930ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews goto free; 1594f64d3365a3e5cb46e69db7e2c82a7cb9a5bed1b8Matthew Wilcox pci_set_master(pdev); 1595574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox bars = pci_select_bars(pdev, IORESOURCE_MEM); 1596574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox if (pci_request_selected_regions(pdev, bars, "nvme")) 1597574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox goto disable; 15980ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews 1599b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox INIT_LIST_HEAD(&dev->namespaces); 1600b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->pci_dev = pdev; 1601b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_set_drvdata(pdev, dev); 16022930353f9f2b9e4629e935acd970cb73c1171229Matthew Wilcox dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); 16032930353f9f2b9e4629e935acd970cb73c1171229Matthew Wilcox dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); 1604b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_set_instance(dev); 160553c9577e9ca68a633c6e9df2b54eaecacfa77f62Matthew Wilcox dev->entry[0].vector = pdev->irq; 1606b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1607091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox result = nvme_setup_prp_pools(dev); 1608091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (result) 1609091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox goto disable_msix; 1610091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1611b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); 1612b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->bar) { 1613b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = -ENOMEM; 1614574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox goto disable_msix; 1615b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1616b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1617b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = nvme_configure_admin_queue(dev); 1618b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 1619b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto unmap; 1620b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->queue_count++; 1621b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 16221fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 16231fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_add(&dev->node, &dev_list); 16241fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 16251fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 1626740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox result = nvme_dev_add(dev); 1627740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (result) 1628740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox goto delete; 1629740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 1630b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1631b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1632b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox delete: 1633740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox spin_lock(&dev_list_lock); 1634740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox list_del(&dev->node); 1635740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox spin_unlock(&dev_list_lock); 1636740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 1637b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queues(dev); 1638b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unmap: 1639b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox iounmap(dev->bar); 1640574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox disable_msix: 1641b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_disable_msix(pdev); 1642b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_release_instance(dev); 1643091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvme_release_prp_pools(dev); 1644574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox disable: 16450ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews pci_disable_device(pdev); 1646574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox pci_release_regions(pdev); 1647b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free: 1648b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->queues); 1649b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->entry); 1650b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev); 1651b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1652b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1653b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1654b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void __devexit nvme_remove(struct pci_dev *pdev) 1655b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1656b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev = pci_get_drvdata(pdev); 1657b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_dev_remove(dev); 1658b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_disable_msix(pdev); 1659b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox iounmap(dev->bar); 1660b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_release_instance(dev); 1661091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvme_release_prp_pools(dev); 16620ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews pci_disable_device(pdev); 1663574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox pci_release_regions(pdev); 1664b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->queues); 1665b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->entry); 1666b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev); 1667b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1668b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1669b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* These functions are yet to be implemented */ 1670b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_detected NULL 1671b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_dump_registers NULL 1672b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_link_reset NULL 1673b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_slot_reset NULL 1674b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_resume NULL 1675b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_suspend NULL 1676b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_resume NULL 1677b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 16781d3520357df99baf4ad89f86268ac96cd38092d9Stephen Hemmingerstatic const struct pci_error_handlers nvme_err_handler = { 1679b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .error_detected = nvme_error_detected, 1680b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .mmio_enabled = nvme_dump_registers, 1681b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .link_reset = nvme_link_reset, 1682b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .slot_reset = nvme_slot_reset, 1683b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_error_resume, 1684b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1685b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1686b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* Move to pci_ids.h later */ 1687b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define PCI_CLASS_STORAGE_EXPRESS 0x010802 1688b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1689b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic DEFINE_PCI_DEVICE_TABLE(nvme_id_table) = { 1690b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, 1691b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { 0, } 1692b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1693b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_DEVICE_TABLE(pci, nvme_id_table); 1694b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1695b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct pci_driver nvme_driver = { 1696b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .name = "nvme", 1697b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .id_table = nvme_id_table, 1698b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .probe = nvme_probe, 1699b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .remove = __devexit_p(nvme_remove), 1700b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .suspend = nvme_suspend, 1701b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_resume, 1702b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .err_handler = &nvme_err_handler, 1703b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1704b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1705b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __init nvme_init(void) 1706b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 17071fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox int result = -EBUSY; 17081fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 17091fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); 17101fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (IS_ERR(nvme_thread)) 17111fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return PTR_ERR(nvme_thread); 1712b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1713b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_major = register_blkdev(nvme_major, "nvme"); 1714b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (nvme_major <= 0) 17151fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto kill_kthread; 1716b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1717b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = pci_register_driver(&nvme_driver); 17181fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (result) 17191fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto unregister_blkdev; 17201fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 1721b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 17221fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox unregister_blkdev: 1723b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 17241fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kill_kthread: 17251fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 1726b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1727b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1728b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1729b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void __exit nvme_exit(void) 1730b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1731b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_unregister_driver(&nvme_driver); 1732b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 17331fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 1734b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1735b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1736b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); 1737b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_LICENSE("GPL"); 1738366e8217e5ec6ce9f73aec19c46d983110fb4a98Matthew WilcoxMODULE_VERSION("0.8"); 1739b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_init(nvme_init); 1740b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_exit(nvme_exit); 1741