nvme-core.c revision 0ac13140d796eb1e2f8956aea97a6e5e4ebcf981
1b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 2b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * NVM Express device driver 3b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Copyright (c) 2011, Intel Corporation. 4b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 5b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * This program is free software; you can redistribute it and/or modify it 6b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * under the terms and conditions of the GNU General Public License, 7b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * version 2, as published by the Free Software Foundation. 8b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 9b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * This program is distributed in the hope it will be useful, but WITHOUT 10b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * more details. 13b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 14b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * You should have received a copy of the GNU General Public License along with 15b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * this program; if not, write to the Free Software Foundation, Inc., 16b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 17b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 18b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 19b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/nvme.h> 20b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/bio.h> 218de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox#include <linux/bitops.h> 22b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/blkdev.h> 23fd63e9ceeeae58cfe877c2d49d41c1bf7532303cMatthew Wilcox#include <linux/delay.h> 24b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/errno.h> 25b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/fs.h> 26b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/genhd.h> 275aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox#include <linux/idr.h> 28b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/init.h> 29b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/interrupt.h> 30b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/io.h> 31b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/kdev_t.h> 321fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox#include <linux/kthread.h> 33b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/kernel.h> 34b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/mm.h> 35b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/module.h> 36b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/moduleparam.h> 37b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/pci.h> 38be7b62754e097adc0cb16c25c9ee86ee20de62fbMatthew Wilcox#include <linux/poison.h> 39b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/sched.h> 40b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/slab.h> 41b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/types.h> 42b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#include <linux/version.h> 43b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 44b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define NVME_Q_DEPTH 1024 45b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define SQ_SIZE(depth) (depth * sizeof(struct nvme_command)) 46b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define CQ_SIZE(depth) (depth * sizeof(struct nvme_completion)) 47b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define NVME_MINORS 64 48ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox#define NVME_IO_TIMEOUT (5 * HZ) 49e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox#define ADMIN_TIMEOUT (60 * HZ) 50b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 51b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_major; 52b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_param(nvme_major, int, 0); 53b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 5458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic int use_threaded_interrupts; 5558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxmodule_param(use_threaded_interrupts, int, 0); 5658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 571fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic DEFINE_SPINLOCK(dev_list_lock); 581fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic LIST_HEAD(dev_list); 591fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic struct task_struct *nvme_thread; 601fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 61b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 62b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Represents an NVM Express device. Each nvme_dev is a PCI function. 63b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 64b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstruct nvme_dev { 651fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct list_head node; 66b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue **queues; 67b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 __iomem *dbs; 68b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct pci_dev *pci_dev; 69091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct dma_pool *prp_page_pool; 7099802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox struct dma_pool *prp_small_pool; 71b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int instance; 72b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int queue_count; 73f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox int db_stride; 74b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 ctrl_config; 75b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct msix_entry *entry; 76b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_bar __iomem *bar; 77b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct list_head namespaces; 7851814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox char serial[20]; 7951814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox char model[40]; 8051814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox char firmware_rev[8]; 818fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch u32 max_hw_sectors; 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 617b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 618b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * NB: return value of non-zero would mean that we were a stacking driver. 619b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * make_request must always succeed. 620b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 621b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_make_request(struct request_queue *q, struct bio *bio) 622b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 623b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = q->queuedata; 624040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox struct nvme_queue *nvmeq = get_nvmeq(ns->dev); 625eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox int result = -EBUSY; 626eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox 627eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 628eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 629eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox result = nvme_submit_bio_queue(nvmeq, ns, bio); 630eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (unlikely(result)) { 631eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 632eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox add_wait_queue(&nvmeq->sq_full, &nvmeq->sq_cong_wait); 633b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_add(&nvmeq->sq_cong, bio); 634b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 635eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox 636eeee322647a67c20d9277c5e02c42b2126ea74bcMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 637b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox put_nvmeq(nvmeq); 638b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 639b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 640b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 641b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 642b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_process_cq(struct nvme_queue *nvmeq) 643b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 644821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox u16 head, phase; 645b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 646b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = nvmeq->cq_head; 647821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = nvmeq->cq_phase; 648b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 649b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (;;) { 650c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 651c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 652b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_completion cqe = nvmeq->cqes[head]; 653821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != phase) 654b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox break; 655b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_head = le16_to_cpu(cqe.sq_head); 656b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (++head == nvmeq->q_depth) { 657b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox head = 0; 658821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox phase = !phase; 659b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 660b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 661c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = free_cmdid(nvmeq, cqe.command_id, &fn); 6625c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox fn(nvmeq->dev, ctx, &cqe); 663b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 664b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 665b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* If the controller ignores the cq head doorbell and continuously 666b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * writes to the queue, it is theoretically possible to wrap around 667b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * the queue twice and mistakenly return IRQ_NONE. Linux only 668b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * requires that 0.1% of your interrupts are handled, so this isn't 669b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * a big problem. 670b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 671821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) 672b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return IRQ_NONE; 673b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 674f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox writel(head, nvmeq->q_db + (1 << nvmeq->dev->db_stride)); 675b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = head; 676821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = phase; 677b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 678b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return IRQ_HANDLED; 679b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 680b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 681b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic irqreturn_t nvme_irq(int irq, void *data) 682b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 68358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox irqreturn_t result; 68458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 68558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_lock(&nvmeq->q_lock); 68658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox result = nvme_process_cq(nvmeq); 68758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox spin_unlock(&nvmeq->q_lock); 68858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return result; 68958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 69058ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 69158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcoxstatic irqreturn_t nvme_irq_check(int irq, void *data) 69258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox{ 69358ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_queue *nvmeq = data; 69458ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox struct nvme_completion cqe = nvmeq->cqes[nvmeq->cq_head]; 69558ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if ((le16_to_cpu(cqe.status) & 1) != nvmeq->cq_phase) 69658ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_NONE; 69758ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return IRQ_WAKE_THREAD; 69858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox} 69958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox 7003c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcoxstatic void nvme_abort_command(struct nvme_queue *nvmeq, int cmdid) 7013c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox{ 7023c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_lock_irq(&nvmeq->q_lock); 703c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cancel_cmdid(nvmeq, cmdid, NULL); 7043c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 7053c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox} 7063c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 707c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcoxstruct sync_cmd_info { 708c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct task_struct *task; 709c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox u32 result; 710c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox int status; 711c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox}; 712c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 7135c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcoxstatic void sync_completion(struct nvme_dev *dev, void *ctx, 714c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct nvme_completion *cqe) 715c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox{ 716c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox struct sync_cmd_info *cmdinfo = ctx; 717c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->result = le32_to_cpup(&cqe->result); 718c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdinfo->status = le16_to_cpup(&cqe->status) >> 1; 719c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox wake_up_process(cmdinfo->task); 720c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox} 721c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox 722b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* 723b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * Returns 0 on success. If the result is negative, it's a Linux error code; 724b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox * if the result is positive, it's an NVM Express status code 725b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox */ 7263c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcoxstatic int nvme_submit_sync_cmd(struct nvme_queue *nvmeq, 727e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox struct nvme_command *cmd, u32 *result, unsigned timeout) 728b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 729b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int cmdid; 730b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct sync_cmd_info cmdinfo; 731b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 732b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.task = current; 733b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmdinfo.status = -EINTR; 734b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 735c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox cmdid = alloc_cmdid_killable(nvmeq, &cmdinfo, sync_completion, 736e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox timeout); 737b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (cmdid < 0) 738b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdid; 739b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox cmd->common.command_id = cmdid; 740b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7413c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox set_current_state(TASK_KILLABLE); 7423c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_submit_cmd(nvmeq, cmd); 743b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox schedule(); 744b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 7453c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox if (cmdinfo.status == -EINTR) { 7463c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox nvme_abort_command(nvmeq, cmdid); 7473c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox return -EINTR; 7483c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox } 7493c0cf138d7789feb3f335f6f1d24ad8fc8b3a23fMatthew Wilcox 750b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 751b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox *result = cmdinfo.result; 752b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 753b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return cmdinfo.status; 754b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 755b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 756b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_submit_admin_cmd(struct nvme_dev *dev, struct nvme_command *cmd, 757b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 *result) 758b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 759e85248e516c550382ba33ca325c272a0ca397e44Matthew Wilcox return nvme_submit_sync_cmd(dev->queues[0], cmd, result, ADMIN_TIMEOUT); 760b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 761b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 762b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) 763b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 764b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 765b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 766b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 767b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 768b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.opcode = opcode; 769b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.delete_queue.qid = cpu_to_le16(id); 770b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 771b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 772b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 773b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 774b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 775b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 776b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 777b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, 778b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 779b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 780b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 781b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 782b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; 783b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 784b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 785b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.opcode = nvme_admin_create_cq; 786b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.prp1 = cpu_to_le64(nvmeq->cq_dma_addr); 787b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cqid = cpu_to_le16(qid); 788b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 789b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.cq_flags = cpu_to_le16(flags); 790b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); 791b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 792b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 793b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 794b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 795b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 796b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 797b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 798b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, 799b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq) 800b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 801b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 802b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_command c; 803b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int flags = NVME_QUEUE_PHYS_CONTIG | NVME_SQ_PRIO_MEDIUM; 804b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 805b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset(&c, 0, sizeof(c)); 806b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.opcode = nvme_admin_create_sq; 807b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.prp1 = cpu_to_le64(nvmeq->sq_dma_addr); 808b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sqid = cpu_to_le16(qid); 809b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.qsize = cpu_to_le16(nvmeq->q_depth - 1); 810b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.sq_flags = cpu_to_le16(flags); 811b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox c.create_sq.cqid = cpu_to_le16(qid); 812b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 813b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 814b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 815b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 816b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 817b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 818b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 819b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_cq(struct nvme_dev *dev, u16 cqid) 820b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 821b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_cq, cqid); 822b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 823b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 824b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int adapter_delete_sq(struct nvme_dev *dev, u16 sqid) 825b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 826b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return adapter_delete_queue(dev, nvme_admin_delete_sq, sqid); 827b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 828b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 829bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcoxstatic int nvme_identify(struct nvme_dev *dev, unsigned nsid, unsigned cns, 830bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox dma_addr_t dma_addr) 831bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 832bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 833bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 834bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 835bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.opcode = nvme_admin_identify; 836bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.nsid = cpu_to_le32(nsid); 837bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.prp1 = cpu_to_le64(dma_addr); 838bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.identify.cns = cpu_to_le32(cns); 839bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 840bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, NULL); 841bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 842bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 843bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcoxstatic int nvme_get_features(struct nvme_dev *dev, unsigned fid, 844a42ceccef0c43b46ff6bc1b12a7c1076ef243df1Keith Busch unsigned nsid, dma_addr_t dma_addr) 845bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox{ 846bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_command c; 847bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 848bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox memset(&c, 0, sizeof(c)); 849bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.opcode = nvme_admin_get_features; 850a42ceccef0c43b46ff6bc1b12a7c1076ef243df1Keith Busch c.features.nsid = cpu_to_le32(nsid); 851bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 852bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox c.features.fid = cpu_to_le32(fid); 853bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 854df3481399042200792822b6243e36a95a557b57eMatthew Wilcox return nvme_submit_admin_cmd(dev, &c, NULL); 855df3481399042200792822b6243e36a95a557b57eMatthew Wilcox} 856df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 857df3481399042200792822b6243e36a95a557b57eMatthew Wilcoxstatic int nvme_set_features(struct nvme_dev *dev, unsigned fid, 858df3481399042200792822b6243e36a95a557b57eMatthew Wilcox unsigned dword11, dma_addr_t dma_addr, u32 *result) 859df3481399042200792822b6243e36a95a557b57eMatthew Wilcox{ 860df3481399042200792822b6243e36a95a557b57eMatthew Wilcox struct nvme_command c; 861df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 862df3481399042200792822b6243e36a95a557b57eMatthew Wilcox memset(&c, 0, sizeof(c)); 863df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.opcode = nvme_admin_set_features; 864df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.prp1 = cpu_to_le64(dma_addr); 865df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.fid = cpu_to_le32(fid); 866df3481399042200792822b6243e36a95a557b57eMatthew Wilcox c.features.dword11 = cpu_to_le32(dword11); 867df3481399042200792822b6243e36a95a557b57eMatthew Wilcox 868bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox return nvme_submit_admin_cmd(dev, &c, result); 869bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox} 870bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox 871b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_free_queue(struct nvme_dev *dev, int qid) 872b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 873b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = dev->queues[qid]; 874aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox int vector = dev->entry[nvmeq->cq_vector].vector; 875b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 876aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox irq_set_affinity_hint(vector, NULL); 877aba2080f3f1639f9202f1a52993669844abcfb80Matthew Wilcox free_irq(vector, nvmeq); 878b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 879b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* Don't tell the adapter to delete the admin queue */ 880b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (qid) { 881b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 882b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 883b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 884b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 885b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 886b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 887b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 888b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 889b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 890b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 891b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 892b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct nvme_queue *nvme_alloc_queue(struct nvme_dev *dev, int qid, 893b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int depth, int vector) 894b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 895b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 896a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch unsigned extra = DIV_ROUND_UP(depth, 8) + (depth * 897a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch sizeof(struct nvme_cmd_info)); 898b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = kzalloc(sizeof(*nvmeq) + extra, GFP_KERNEL); 899b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq) 900b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 901b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 902b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cqes = dma_alloc_coherent(dmadev, CQ_SIZE(depth), 903b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->cq_dma_addr, GFP_KERNEL); 904b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->cqes) 905b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 906b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox memset((void *)nvmeq->cqes, 0, CQ_SIZE(depth)); 907b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 908b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds = dma_alloc_coherent(dmadev, SQ_SIZE(depth), 909b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox &nvmeq->sq_dma_addr, GFP_KERNEL); 910b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!nvmeq->sq_cmds) 911b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_cqdma; 912b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 913b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_dmadev = dmadev; 914091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvmeq->dev = dev; 915b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox spin_lock_init(&nvmeq->q_lock); 916b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_head = 0; 917821234603b265f59d7eebce16d9e8beca2a5752dMatthew Wilcox nvmeq->cq_phase = 1; 918b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox init_waitqueue_head(&nvmeq->sq_full); 9191fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox init_waitqueue_entry(&nvmeq->sq_cong_wait, nvme_thread); 920b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox bio_list_init(&nvmeq->sq_cong); 921f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox nvmeq->q_db = &dev->dbs[qid << (dev->db_stride + 1)]; 922b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->q_depth = depth; 923b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_vector = vector; 924b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 925b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 926b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 927b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_cqdma: 928b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(dmadev, CQ_SIZE(nvmeq->q_depth), (void *)nvmeq->cqes, 929b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->cq_dma_addr); 930b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 931b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 932b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 933b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 934b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9353001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcoxstatic int queue_request_irq(struct nvme_dev *dev, struct nvme_queue *nvmeq, 9363001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox const char *name) 9373001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox{ 93858ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox if (use_threaded_interrupts) 93958ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox return request_threaded_irq(dev->entry[nvmeq->cq_vector].vector, 940ec6ce618d65b5ce1bef83a5509255107a0feac44Matthew Wilcox nvme_irq_check, nvme_irq, 94158ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox IRQF_DISABLED | IRQF_SHARED, 94258ffacb545f76fc2c65d1fbfa5acf5184a2a09e6Matthew Wilcox name, nvmeq); 9433001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox return request_irq(dev->entry[nvmeq->cq_vector].vector, nvme_irq, 9443001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox IRQF_DISABLED | IRQF_SHARED, name, nvmeq); 9453001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox} 9463001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox 947b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic __devinit struct nvme_queue *nvme_create_queue(struct nvme_dev *dev, 948b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int qid, int cq_size, int vector) 949b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 950b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int result; 951b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq = nvme_alloc_queue(dev, qid, cq_size, vector); 952b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9533f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox if (!nvmeq) 9546f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return ERR_PTR(-ENOMEM); 9553f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox 956b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_cq(dev, qid, nvmeq); 957b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 958b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free_nvmeq; 959b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 960b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = adapter_alloc_sq(dev, qid, nvmeq); 961b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 962b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_cq; 963b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 9643001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme"); 965b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result < 0) 966b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto release_sq; 967b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 968b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return nvmeq; 969b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 970b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_sq: 971b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_sq(dev, qid); 972b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox release_cq: 973b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox adapter_delete_cq(dev, qid); 974b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free_nvmeq: 975b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, CQ_SIZE(nvmeq->q_depth), 976b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox (void *)nvmeq->cqes, nvmeq->cq_dma_addr); 977b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_free_coherent(nvmeq->q_dmadev, SQ_SIZE(nvmeq->q_depth), 978b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq->sq_cmds, nvmeq->sq_dma_addr); 979b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(nvmeq); 9806f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return ERR_PTR(result); 981b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 982b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 983b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __devinit nvme_configure_admin_queue(struct nvme_dev *dev) 984b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 985b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int result; 986b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 aqa; 98722605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox u64 cap; 98822605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox unsigned long timeout; 989b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_queue *nvmeq; 990b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 991b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 992b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 993b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvmeq = nvme_alloc_queue(dev, 0, 64, 0); 9943f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox if (!nvmeq) 9953f85d50b609e8a5ef151656210203a6e94c19538Matthew Wilcox return -ENOMEM; 996b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 997b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa = nvmeq->q_depth - 1; 998b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox aqa |= aqa << 16; 999b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1000b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config = NVME_CC_ENABLE | NVME_CC_CSS_NVM; 1001b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= (PAGE_SHIFT - 12) << NVME_CC_MPS_SHIFT; 1002b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; 10037f53f9d2424533256ae86f7df5661a17de743de8Matthew Wilcox dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; 1004b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10055911f20039ce59d7e7834f0c42151cf759b6f786Shane Michael Matthews writel(0, &dev->bar->cc); 1006b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(aqa, &dev->bar->aqa); 1007b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->sq_dma_addr, &dev->bar->asq); 1008b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writeq(nvmeq->cq_dma_addr, &dev->bar->acq); 1009b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox writel(dev->ctrl_config, &dev->bar->cc); 1010b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 101122605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox cap = readq(&dev->bar->cap); 101222605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox timeout = ((NVME_CAP_TIMEOUT(cap) + 1) * HZ / 2) + jiffies; 1013f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->db_stride = NVME_CAP_STRIDE(cap); 101422605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox 1015b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox while (!(readl(&dev->bar->csts) & NVME_CSTS_RDY)) { 1016b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox msleep(100); 1017b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (fatal_signal_pending(current)) 1018b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EINTR; 101922605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox if (time_after(jiffies, timeout)) { 102022605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox dev_err(&dev->pci_dev->dev, 102122605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox "Device not ready; aborting initialisation\n"); 102222605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox return -ENODEV; 102322605f96810d073eb74051d0295b6577d6a6a563Matthew Wilcox } 1024b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1025b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10263001082cac4bf6ffd09f72b39e6292ad6394ef17Matthew Wilcox result = queue_request_irq(dev, nvmeq, "nvme admin"); 1027b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->queues[0] = nvmeq; 1028b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1029b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1030b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1031eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcoxstatic struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write, 1032eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox unsigned long addr, unsigned length) 1033b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 103436c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox int i, err, count, nents, offset; 10357fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct scatterlist *sg; 10367fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox struct page **pages; 1037eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 103836c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 103936c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (addr & 3) 1040eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 10417fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox if (!length) 1042eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(-EINVAL); 10437fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 104436c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox offset = offset_in_page(addr); 10457fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox count = DIV_ROUND_UP(offset + length, PAGE_SIZE); 10467fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox pages = kcalloc(count, sizeof(*pages), GFP_KERNEL); 104722fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter if (!pages) 104822fff826e715e9727d3c7a69f15e602a9801b673Dan Carpenter return ERR_PTR(-ENOMEM); 104936c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox 105036c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = get_user_pages_fast(addr, count, 1, pages); 105136c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (err < count) { 105236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox count = err; 105336c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox err = -EFAULT; 105436c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox goto put_pages; 105536c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox } 10567fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 1057eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_alloc_iod(count, length, GFP_KERNEL); 1058eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox sg = iod->sg; 105936c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox sg_init_table(sg, count); 1060d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox for (i = 0; i < count; i++) { 1061d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox sg_set_page(&sg[i], pages[i], 1062d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox min_t(int, length, PAGE_SIZE - offset), offset); 1063d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox length -= (PAGE_SIZE - offset); 1064d0ba1e497bca83a3d353eb47c9658afc54d83228Matthew Wilcox offset = 0; 10657fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox } 1066fe304c43c6d63e29ed4fc46a874d7a74313788c5Matthew Wilcox sg_mark_end(&sg[i - 1]); 10671c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox iod->nents = count; 10687fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 10697fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox err = -ENOMEM; 10707fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox nents = dma_map_sg(&dev->pci_dev->dev, sg, count, 10717fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 107236c14ed9caa957c686d4a48fd598a5ec2aa0331bMatthew Wilcox if (!nents) 1073eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox goto free_iod; 1074b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10757fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1076eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return iod; 1077b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1078eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox free_iod: 1079eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox kfree(iod); 10807fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_pages: 10817fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox for (i = 0; i < count; i++) 10827fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox put_page(pages[i]); 10837fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox kfree(pages); 1084eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return ERR_PTR(err); 10857fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1086b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10877fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcoxstatic void nvme_unmap_user_pages(struct nvme_dev *dev, int write, 10881c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox struct nvme_iod *iod) 10897fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox{ 10901c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox int i; 1091b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 10921c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox dma_unmap_sg(&dev->pci_dev->dev, iod->sg, iod->nents, 10931c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox write ? DMA_TO_DEVICE : DMA_FROM_DEVICE); 10947fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox 10951c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox for (i = 0; i < iod->nents; i++) 10961c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox put_page(sg_page(&iod->sg[i])); 10977fc3cdabba75c2516b8b645eb0ca7907aea70415Matthew Wilcox} 1098b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1099a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcoxstatic int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio) 1100a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox{ 1101a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_dev *dev = ns->dev; 1102a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_queue *nvmeq; 1103a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_user_io io; 1104a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox struct nvme_command c; 1105a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox unsigned length; 1106eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int status; 1107eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox struct nvme_iod *iod; 1108a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1109a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox if (copy_from_user(&io, uio, sizeof(io))) 1110a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return -EFAULT; 11116c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox length = (io.nblocks + 1) << ns->lba_shift; 11126c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 11136c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox switch (io.opcode) { 11146c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_write: 11156c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox case nvme_cmd_read: 11166bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case nvme_cmd_compare: 1117eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox iod = nvme_map_user_pages(dev, io.opcode & 1, io.addr, length); 11186413214c5d424fd5aae6567848340f962ad2ce0fMatthew Wilcox break; 11196c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox default: 11206bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EINVAL; 11216c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox } 11226c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox 1123eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1124eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1125a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1126a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox memset(&c, 0, sizeof(c)); 1127a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.opcode = io.opcode; 1128a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.flags = io.flags; 11296c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.nsid = cpu_to_le32(ns->ns_id); 1130a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.slba = cpu_to_le64(io.slba); 11316c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.length = cpu_to_le16(io.nblocks); 1132a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.control = cpu_to_le16(io.control); 1133a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox c.rw.dsmgmt = cpu_to_le16(io.dsmgmt); 11346c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.reftag = io.reftag; 11356c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.apptag = io.apptag; 11366c7d49455ceb63064f992347d9185ff5bf43497aMatthew Wilcox c.rw.appmask = io.appmask; 1137a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox /* XXX: metadata */ 1138eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, GFP_KERNEL); 1139a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 1140040a93b52a9eee8177ebaf2ba0ee0f9f518d1bf8Matthew Wilcox nvmeq = get_nvmeq(dev); 1141fa92282149842645931580225647238428374758Matthew Wilcox /* 1142fa92282149842645931580225647238428374758Matthew Wilcox * Since nvme_submit_sync_cmd sleeps, we can't keep preemption 1143b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * disabled. We may be preempted at any point, and be rescheduled 1144b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * to a different CPU. That will cause cacheline bouncing, but no 1145b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox * additional races since q_lock already protects against other CPUs. 1146b1ad37efcafe396ac3944853589688dd0ec3c64eMatthew Wilcox */ 1147a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox put_nvmeq(nvmeq); 1148b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox if (length != (io.nblocks + 1) << ns->lba_shift) 1149b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1150b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 1151ff976d724a74e4522e9ca2de1fb37ac4520f454fMatthew Wilcox status = nvme_submit_sync_cmd(nvmeq, &c, NULL, NVME_IO_TIMEOUT); 1152a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 11531c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, io.opcode & 1, iod); 1154eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 1155a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return status; 1156a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox} 1157a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox 115850af8baec46a99a9b81a4600c0374f83a5a590a9Keith Buschstatic int nvme_user_admin_cmd(struct nvme_dev *dev, 11596bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd __user *ucmd) 11606ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox{ 11616bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox struct nvme_admin_cmd cmd; 11626ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox struct nvme_command c; 1163eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox int status, length; 1164c7d36ab8fa04c213328119a9c0d66985fe204ee5Keith Busch struct nvme_iod *uninitialized_var(iod); 11656ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 11666bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (!capable(CAP_SYS_ADMIN)) 11676bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return -EACCES; 11686bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (copy_from_user(&cmd, ucmd, sizeof(cmd))) 11696ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return -EFAULT; 11706ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 11716ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox memset(&c, 0, sizeof(c)); 11726bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.opcode = cmd.opcode; 11736bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.flags = cmd.flags; 11746bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.nsid = cpu_to_le32(cmd.nsid); 11756bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[0] = cpu_to_le32(cmd.cdw2); 11766bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw2[1] = cpu_to_le32(cmd.cdw3); 11776bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[0] = cpu_to_le32(cmd.cdw10); 11786bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[1] = cpu_to_le32(cmd.cdw11); 11796bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[2] = cpu_to_le32(cmd.cdw12); 11806bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[3] = cpu_to_le32(cmd.cdw13); 11816bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[4] = cpu_to_le32(cmd.cdw14); 11826bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox c.common.cdw10[5] = cpu_to_le32(cmd.cdw15); 11836bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 11846bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox length = cmd.data_len; 11856bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 1186497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox iod = nvme_map_user_pages(dev, cmd.opcode & 1, cmd.addr, 1187497421880acecd0281d3182d534f3d28c927caecMatthew Wilcox length); 1188eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox if (IS_ERR(iod)) 1189eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox return PTR_ERR(iod); 1190eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox length = nvme_setup_prps(dev, &c.common, iod, length, 1191eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox GFP_KERNEL); 11926bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 11936bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox 11946bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (length != cmd.data_len) 1195b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = -ENOMEM; 1196b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox else 1197b77954cbddff28d55a36fad3c16f4daebb0f01dfMatthew Wilcox status = nvme_submit_admin_cmd(dev, &c, NULL); 1198eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox 11996bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox if (cmd.data_len) { 12001c2ad9faaf662b4a525348775deca3ac8e6c35a0Matthew Wilcox nvme_unmap_user_pages(dev, cmd.opcode & 1, iod); 1201eca18b2394a9387feeaf14cd884ddddd7a809d19Matthew Wilcox nvme_free_iod(dev, iod); 12026bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox } 12036ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox return status; 12046ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox} 12056ee44cdced04a53dc4f27eb97067e6cd33784726Matthew Wilcox 1206b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, 1207b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unsigned long arg) 1208b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1209b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns = bdev->bd_disk->private_data; 1210b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1211b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox switch (cmd) { 12126bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ID: 12136bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox return ns->ns_id; 12146bbf1acddeed0bfb345a5578f9fcada16f1e514fMatthew Wilcox case NVME_IOCTL_ADMIN_CMD: 121550af8baec46a99a9b81a4600c0374f83a5a590a9Keith Busch return nvme_user_admin_cmd(ns->dev, (void __user *)arg); 1216a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox case NVME_IOCTL_SUBMIT_IO: 1217a53295b6998f62d961c29e54051c1cf1d738c2b3Matthew Wilcox return nvme_submit_io(ns, (void __user *)arg); 1218b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox default: 1219b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOTTY; 1220b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1221b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1222b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1223b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic const struct block_device_operations nvme_fops = { 1224b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .owner = THIS_MODULE, 1225b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .ioctl = nvme_ioctl, 12264948168280b269a514045766ddd872cfac5968e1Matthew Wilcox .compat_ioctl = nvme_ioctl, 1227b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1228b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 12298de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcoxstatic void nvme_timeout_ios(struct nvme_queue *nvmeq) 12308de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox{ 12318de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox int depth = nvmeq->q_depth - 1; 12328de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox struct nvme_cmd_info *info = nvme_cmd_info(nvmeq); 12338de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox unsigned long now = jiffies; 12348de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox int cmdid; 12358de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox 12368de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox for_each_set_bit(cmdid, nvmeq->cmdid_data, depth) { 1237c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox void *ctx; 1238c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox nvme_completion_fn fn; 12398de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox static struct nvme_completion cqe = { .status = cpu_to_le16(NVME_SC_ABORT_REQ) << 1, }; 12408de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox 12418de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox if (!time_after(now, info[cmdid].timeout)) 12428de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox continue; 12438de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox dev_warn(nvmeq->q_dmadev, "Timing out I/O %d\n", cmdid); 1244c2f5b65020869215814df03c3941dac9436f99fbMatthew Wilcox ctx = cancel_cmdid(nvmeq, cmdid, &fn); 12455c1281a3bf5655ec1b90db495da3a2b77826ba88Matthew Wilcox fn(nvmeq->dev, ctx, &cqe); 12468de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox } 12478de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox} 12488de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox 12491fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic void nvme_resubmit_bios(struct nvme_queue *nvmeq) 12501fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 12511fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (bio_list_peek(&nvmeq->sq_cong)) { 12521fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct bio *bio = bio_list_pop(&nvmeq->sq_cong); 12531fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_ns *ns = bio->bi_bdev->bd_disk->private_data; 12541fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_submit_bio_queue(nvmeq, ns, bio)) { 12551fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox bio_list_add_head(&nvmeq->sq_cong, bio); 12561fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox break; 12571fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 12583cb967c03926edd2c414082f4cc0feb7b372edaeMatthew Wilcox if (bio_list_empty(&nvmeq->sq_cong)) 12593cb967c03926edd2c414082f4cc0feb7b372edaeMatthew Wilcox remove_wait_queue(&nvmeq->sq_full, 12603cb967c03926edd2c414082f4cc0feb7b372edaeMatthew Wilcox &nvmeq->sq_cong_wait); 12611fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 12621fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 12631fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 12641fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcoxstatic int nvme_kthread(void *data) 12651fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox{ 12661fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_dev *dev; 12671fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 12681fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox while (!kthread_should_stop()) { 12691fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox __set_current_state(TASK_RUNNING); 12701fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 12711fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_for_each_entry(dev, &dev_list, node) { 12721fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox int i; 12731fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox for (i = 0; i < dev->queue_count; i++) { 12741fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox struct nvme_queue *nvmeq = dev->queues[i]; 1275740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (!nvmeq) 1276740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox continue; 12771fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock_irq(&nvmeq->q_lock); 12781fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (nvme_process_cq(nvmeq)) 12791fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox printk("process_cq did something\n"); 12808de055350fbaa96b6563892c195a60be583faa9cMatthew Wilcox nvme_timeout_ios(nvmeq); 12811fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_resubmit_bios(nvmeq); 12821fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock_irq(&nvmeq->q_lock); 12831fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 12841fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 12851fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 12861fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox set_current_state(TASK_INTERRUPTIBLE); 12871fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox schedule_timeout(HZ); 12881fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox } 12891fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 12901fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox} 12911fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 12925aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic DEFINE_IDA(nvme_index_ida); 12935aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 12945aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic int nvme_get_ns_idx(void) 12955aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox{ 12965aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox int index, error; 12975aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 12985aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox do { 12995aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox if (!ida_pre_get(&nvme_index_ida, GFP_KERNEL)) 13005aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox return -1; 13015aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 13025aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_lock(&dev_list_lock); 13035aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox error = ida_get_new(&nvme_index_ida, &index); 13045aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_unlock(&dev_list_lock); 13055aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox } while (error == -EAGAIN); 13065aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 13075aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox if (error) 13085aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox index = -1; 13095aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox return index; 13105aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox} 13115aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 13125aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic void nvme_put_ns_idx(int index) 13135aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox{ 13145aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_lock(&dev_list_lock); 13155aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ida_remove(&nvme_index_ida, index); 13165aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox spin_unlock(&dev_list_lock); 13175aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox} 13185aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox 13195aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcoxstatic struct nvme_ns *nvme_alloc_ns(struct nvme_dev *dev, int nsid, 1320b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_id_ns *id, struct nvme_lba_range_type *rt) 1321b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1322b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns; 1323b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct gendisk *disk; 1324b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int lbaf; 1325b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1326b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (rt->attributes & NVME_LBART_ATTRIB_HIDE) 1327b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1328b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1329b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns = kzalloc(sizeof(*ns), GFP_KERNEL); 1330b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns) 1331b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1332b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue = blk_alloc_queue(GFP_KERNEL); 1333b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!ns->queue) 1334b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_ns; 13354eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox ns->queue->queue_flags = QUEUE_FLAG_DEFAULT; 13364eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue); 13374eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue); 13384eeb9215a0d5c9494ca8b20158cc8ee82618840cMatthew Wilcox/* queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue); */ 1339b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_queue_make_request(ns->queue, nvme_make_request); 1340b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->dev = dev; 1341b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->queue->queuedata = ns; 1342b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1343b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk = alloc_disk(NVME_MINORS); 1344b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!disk) 1345b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free_queue; 13465aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox ns->ns_id = nsid; 1347b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->disk = disk; 1348b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox lbaf = id->flbas & 0xf; 1349b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox ns->lba_shift = id->lbaf[lbaf].ds; 1350e9ef46369f5107e634a93b7fc4e62a1f53343197Keith Busch blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift); 13518fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch if (dev->max_hw_sectors) 13528fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch blk_queue_max_hw_sectors(ns->queue, dev->max_hw_sectors); 1353b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1354b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->major = nvme_major; 1355b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->minors = NVME_MINORS; 13565aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox disk->first_minor = NVME_MINORS * nvme_get_ns_idx(); 1357b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->fops = &nvme_fops; 1358b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->private_data = ns; 1359b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox disk->queue = ns->queue; 1360388f037f4e7f0a24bac6b1a24f144f5d939f58cfMatthew Wilcox disk->driverfs_dev = &dev->pci_dev->dev; 13615aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox sprintf(disk->disk_name, "nvme%dn%d", dev->instance, nsid); 1362b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9)); 1363b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1364b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return ns; 1365b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1366b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_queue: 1367b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1368b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free_ns: 1369b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1370b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return NULL; 1371b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1372b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1373b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_ns_free(struct nvme_ns *ns) 1374b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 13755aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox int index = ns->disk->first_minor / NVME_MINORS; 1376b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox put_disk(ns->disk); 13775aff9382ddc8aac6eb0c70ffbb351652d71da69aMatthew Wilcox nvme_put_ns_idx(index); 1378b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox blk_cleanup_queue(ns->queue); 1379b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(ns); 1380b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1381b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1382b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcoxstatic int set_queue_count(struct nvme_dev *dev, int count) 1383b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1384b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int status; 1385b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox u32 result; 1386b3b06812e199f248561ce7824a4a8a9cd573c05aMatthew Wilcox u32 q_count = (count - 1) | ((count - 1) << 16); 1387b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1388df3481399042200792822b6243e36a95a557b57eMatthew Wilcox status = nvme_set_features(dev, NVME_FEAT_NUM_QUEUES, q_count, 0, 1389bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox &result); 1390b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (status) 1391b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -EIO; 1392b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return min(result & 0xffff, result >> 16) + 1; 1393b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1394b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1395b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __devinit nvme_setup_io_queues(struct nvme_dev *dev) 1396b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1397a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch int result, cpu, i, nr_io_queues, db_bar_size, q_depth; 1398b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1399b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = num_online_cpus(); 1400b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox result = set_queue_count(dev, nr_io_queues); 14011b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox if (result < 0) 14021b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox return result; 1403b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox if (result < nr_io_queues) 1404b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = result; 1405b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14061b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox /* Deregister the admin queue's interrupt */ 14071b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox free_irq(dev->entry[0].vector, dev->queues[0]); 14081b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1409f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox db_bar_size = 4096 + ((nr_io_queues + 1) << (dev->db_stride + 3)); 1410f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox if (db_bar_size > 8192) { 1411f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox iounmap(dev->bar); 1412f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->bar = ioremap(pci_resource_start(dev->pci_dev, 0), 1413f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox db_bar_size); 1414f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->dbs = ((void __iomem *)dev->bar) + 4096; 1415f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox dev->queues[0]->q_db = dev->dbs; 1416f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox } 1417f1938f6e1ee1583c87ec74dc406fdd8694e99ac8Matthew Wilcox 1418b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) 14191b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->entry[i].entry = i; 14201b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox for (;;) { 1421b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox result = pci_enable_msix(dev->pci_dev, dev->entry, 1422b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues); 14231b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox if (result == 0) { 14241b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox break; 14251b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } else if (result > 0) { 1426b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = result; 14271b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox continue; 14281b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } else { 1429b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox nr_io_queues = 1; 14301b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox break; 14311b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 14321b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 14331b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 14341b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox result = queue_request_irq(dev, dev->queues[0], "nvme admin"); 14351b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox /* XXX: handle failure here */ 14361b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 14371b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_first(cpu_online_mask); 1438b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) { 14391b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox irq_set_affinity_hint(dev->entry[i].vector, get_cpu_mask(cpu)); 14401b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox cpu = cpumask_next(cpu, cpu_online_mask); 14411b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 14421b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox 1443a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch q_depth = min_t(int, NVME_CAP_MQES(readq(&dev->bar->cap)) + 1, 1444a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch NVME_Q_DEPTH); 1445b348b7d54368c87811907a8e88f0d96713c43009Matthew Wilcox for (i = 0; i < nr_io_queues; i++) { 1446a0cadb85b8b758608ae0759151e29de7581c6731Keith Busch dev->queues[i + 1] = nvme_create_queue(dev, i + 1, q_depth, i); 14476f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox if (IS_ERR(dev->queues[i + 1])) 14486f0f54499f2edf7e25410cdd99e6f030f3485fd1Matthew Wilcox return PTR_ERR(dev->queues[i + 1]); 14491b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queue_count++; 14501b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox } 1451b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 14529ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox for (; i < num_possible_cpus(); i++) { 14539ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox int target = i % rounddown_pow_of_two(dev->queue_count - 1); 14549ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox dev->queues[i + 1] = dev->queues[target + 1]; 14559ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox } 14569ecdc946212f7cd592986b2c519b470404caa6b8Matthew Wilcox 1457b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1458b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1459b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1460b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_free_queues(struct nvme_dev *dev) 1461b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1462b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int i; 1463b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1464b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox for (i = dev->queue_count - 1; i >= 0; i--) 1465b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queue(dev, i); 1466b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1467b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1468b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __devinit nvme_dev_add(struct nvme_dev *dev) 1469b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1470b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox int res, nn, i; 1471b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns, *next; 147251814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox struct nvme_id_ctrl *ctrl; 1473bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox struct nvme_id_ns *id_ns; 1474bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox void *mem; 1475b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dma_addr_t dma_addr; 1476b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1477b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = nvme_setup_io_queues(dev); 1478b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1479b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 1480b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1481bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox mem = dma_alloc_coherent(&dev->pci_dev->dev, 8192, &dma_addr, 1482b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 1483b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1484bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, 0, 1, dma_addr); 1485b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) { 1486b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox res = -EIO; 1487b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto out_free; 1488b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1489b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1490bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ctrl = mem; 149151814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox nn = le32_to_cpup(&ctrl->nn); 149251814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->serial, ctrl->sn, sizeof(ctrl->sn)); 149351814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->model, ctrl->mn, sizeof(ctrl->mn)); 149451814232ecae90f888c902e252306df8d017f0ddMatthew Wilcox memcpy(dev->firmware_rev, ctrl->fr, sizeof(ctrl->fr)); 14958fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch if (ctrl->mdts) { 14968fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch int shift = NVME_CAP_MPSMIN(readq(&dev->bar->cap)) + 12; 14978fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch dev->max_hw_sectors = 1 << (ctrl->mdts + shift - 9); 14988fc23e032debd682f5ba9fc524a5846c10d2c522Keith Busch } 1499b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1500bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox id_ns = mem; 15012b2c1896871838cdf549442e8ad0264be5fa74e3Matthew Wilcox for (i = 1; i <= nn; i++) { 1502bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_identify(dev, i, 0, dma_addr); 1503b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1504b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1505b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1506bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox if (id_ns->ncap == 0) 1507b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1508b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1509bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox res = nvme_get_features(dev, NVME_FEAT_LBA_RANGE, i, 1510df3481399042200792822b6243e36a95a557b57eMatthew Wilcox dma_addr + 4096); 1511b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (res) 1512b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox continue; 1513b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1514bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox ns = nvme_alloc_ns(dev, i, mem, mem + 4096); 1515b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (ns) 1516b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_add_tail(&ns->list, &dev->namespaces); 1517b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1518b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry(ns, &dev->namespaces, list) 1519b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox add_disk(ns->disk); 1520b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1521bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox goto out; 1522b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1523b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox out_free: 1524b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 1525b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_del(&ns->list); 1526b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_ns_free(ns); 1527b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1528b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1529bc5fc7e4b22ca855902aba02b28c96f09b446407Matthew Wilcox out: 1530684f5c2025b067a23722e620d0b3b858d8dc5d01Matthew Wilcox dma_free_coherent(&dev->pci_dev->dev, 8192, mem, dma_addr); 1531b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return res; 1532b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1533b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1534b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int nvme_dev_remove(struct nvme_dev *dev) 1535b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1536b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_ns *ns, *next; 1537b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 15381fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 15391fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_del(&dev->node); 15401fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 15411fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 1542b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox /* TODO: wait all I/O finished or cancel them */ 1543b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1544b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_for_each_entry_safe(ns, next, &dev->namespaces, list) { 1545b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox list_del(&ns->list); 1546b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox del_gendisk(ns->disk); 1547b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_ns_free(ns); 1548b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1549b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1550b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queues(dev); 1551b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1552b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1553b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1554b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1555091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic int nvme_setup_prp_pools(struct nvme_dev *dev) 1556091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 1557091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox struct device *dmadev = &dev->pci_dev->dev; 1558091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dev->prp_page_pool = dma_pool_create("prp list page", dmadev, 1559091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox PAGE_SIZE, PAGE_SIZE, 0); 1560091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (!dev->prp_page_pool) 1561091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return -ENOMEM; 1562091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 156399802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox /* Optimisation for I/Os between 4k and 128k */ 156499802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dev->prp_small_pool = dma_pool_create("prp list 256", dmadev, 156599802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox 256, 256, 0); 156699802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox if (!dev->prp_small_pool) { 156799802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 156899802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox return -ENOMEM; 156999802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox } 1570091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox return 0; 1571091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 1572091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1573091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcoxstatic void nvme_release_prp_pools(struct nvme_dev *dev) 1574091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox{ 1575091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox dma_pool_destroy(dev->prp_page_pool); 157699802a7aee2b3dd720e382c52b892cc6a8122b11Matthew Wilcox dma_pool_destroy(dev->prp_small_pool); 1577091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox} 1578091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1579b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* XXX: Use an ida or something to let remove / add work correctly */ 1580b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_set_instance(struct nvme_dev *dev) 1581b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1582b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox static int instance; 1583b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->instance = instance++; 1584b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1585b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1586b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void nvme_release_instance(struct nvme_dev *dev) 1587b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1588b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1589b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1590b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __devinit nvme_probe(struct pci_dev *pdev, 1591b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox const struct pci_device_id *id) 1592b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1593574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox int bars, result = -ENOMEM; 1594b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev; 1595b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1596b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev = kzalloc(sizeof(*dev), GFP_KERNEL); 1597b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev) 1598b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return -ENOMEM; 1599b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->entry = kcalloc(num_possible_cpus(), sizeof(*dev->entry), 1600b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox GFP_KERNEL); 1601b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->entry) 1602b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 16031b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox dev->queues = kcalloc(num_possible_cpus() + 1, sizeof(void *), 16041b23484bd012c078de2ea939249e2fb2e85a0a6eMatthew Wilcox GFP_KERNEL); 1605b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->queues) 1606b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto free; 1607b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 16080ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews if (pci_enable_device_mem(pdev)) 16090ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews goto free; 1610f64d3365a3e5cb46e69db7e2c82a7cb9a5bed1b8Matthew Wilcox pci_set_master(pdev); 1611574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox bars = pci_select_bars(pdev, IORESOURCE_MEM); 1612574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox if (pci_request_selected_regions(pdev, bars, "nvme")) 1613574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox goto disable; 16140ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews 1615b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox INIT_LIST_HEAD(&dev->namespaces); 1616b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->pci_dev = pdev; 1617b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_set_drvdata(pdev, dev); 16182930353f9f2b9e4629e935acd970cb73c1171229Matthew Wilcox dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); 16192930353f9f2b9e4629e935acd970cb73c1171229Matthew Wilcox dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); 1620b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_set_instance(dev); 162153c9577e9ca68a633c6e9df2b54eaecacfa77f62Matthew Wilcox dev->entry[0].vector = pdev->irq; 1622b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1623091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox result = nvme_setup_prp_pools(dev); 1624091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox if (result) 1625091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox goto disable_msix; 1626091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox 1627b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->bar = ioremap(pci_resource_start(pdev, 0), 8192); 1628b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (!dev->bar) { 1629b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = -ENOMEM; 1630574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox goto disable_msix; 1631b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox } 1632b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1633b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = nvme_configure_admin_queue(dev); 1634b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox if (result) 1635b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox goto unmap; 1636b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox dev->queue_count++; 1637b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 16381fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_lock(&dev_list_lock); 16391fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox list_add(&dev->node, &dev_list); 16401fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox spin_unlock(&dev_list_lock); 16411fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 1642740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox result = nvme_dev_add(dev); 1643740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox if (result) 1644740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox goto delete; 1645740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 1646b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return 0; 1647b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1648b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox delete: 1649740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox spin_lock(&dev_list_lock); 1650740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox list_del(&dev->node); 1651740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox spin_unlock(&dev_list_lock); 1652740216fc59cba54f65187c9ed92f29bce3cf8778Matthew Wilcox 1653b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_free_queues(dev); 1654b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unmap: 1655b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox iounmap(dev->bar); 1656574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox disable_msix: 1657b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_disable_msix(pdev); 1658b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_release_instance(dev); 1659091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvme_release_prp_pools(dev); 1660574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox disable: 16610ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews pci_disable_device(pdev); 1662574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox pci_release_regions(pdev); 1663b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox free: 1664b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->queues); 1665b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->entry); 1666b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev); 1667b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1668b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1669b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1670b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void __devexit nvme_remove(struct pci_dev *pdev) 1671b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1672b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox struct nvme_dev *dev = pci_get_drvdata(pdev); 1673b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_dev_remove(dev); 1674b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_disable_msix(pdev); 1675b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox iounmap(dev->bar); 1676b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox nvme_release_instance(dev); 1677091b609258b8e01cc45b01a41ca5e496f674d989Matthew Wilcox nvme_release_prp_pools(dev); 16780ee5a7d7cb9309bd393a25c395f19fb12a842602Shane Michael Matthews pci_disable_device(pdev); 1679574e8b95bc3780e10e9b5e9d51074d503dd3d5d9Matthew Wilcox pci_release_regions(pdev); 1680b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->queues); 1681b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev->entry); 1682b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox kfree(dev); 1683b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1684b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1685b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* These functions are yet to be implemented */ 1686b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_detected NULL 1687b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_dump_registers NULL 1688b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_link_reset NULL 1689b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_slot_reset NULL 1690b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_error_resume NULL 1691b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_suspend NULL 1692b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define nvme_resume NULL 1693b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1694b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct pci_error_handlers nvme_err_handler = { 1695b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .error_detected = nvme_error_detected, 1696b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .mmio_enabled = nvme_dump_registers, 1697b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .link_reset = nvme_link_reset, 1698b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .slot_reset = nvme_slot_reset, 1699b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_error_resume, 1700b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1701b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1702b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox/* Move to pci_ids.h later */ 1703b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox#define PCI_CLASS_STORAGE_EXPRESS 0x010802 1704b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1705b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic DEFINE_PCI_DEVICE_TABLE(nvme_id_table) = { 1706b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, 1707b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox { 0, } 1708b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1709b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_DEVICE_TABLE(pci, nvme_id_table); 1710b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1711b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic struct pci_driver nvme_driver = { 1712b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .name = "nvme", 1713b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .id_table = nvme_id_table, 1714b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .probe = nvme_probe, 1715b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .remove = __devexit_p(nvme_remove), 1716b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .suspend = nvme_suspend, 1717b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .resume = nvme_resume, 1718b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox .err_handler = &nvme_err_handler, 1719b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox}; 1720b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1721b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic int __init nvme_init(void) 1722b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 17230ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox int result; 17241fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox 17251fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox nvme_thread = kthread_run(nvme_kthread, NULL, "nvme"); 17261fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (IS_ERR(nvme_thread)) 17271fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return PTR_ERR(nvme_thread); 1728b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 17295c42ea1643a630060f9e71e06d3933d244970967Keith Busch result = register_blkdev(nvme_major, "nvme"); 17305c42ea1643a630060f9e71e06d3933d244970967Keith Busch if (result < 0) 17311fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto kill_kthread; 17325c42ea1643a630060f9e71e06d3933d244970967Keith Busch else if (result > 0) 17330ac13140d796eb1e2f8956aea97a6e5e4ebcf981Matthew Wilcox nvme_major = result; 1734b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1735b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox result = pci_register_driver(&nvme_driver); 17361fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox if (result) 17371fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox goto unregister_blkdev; 17381fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox return 0; 1739b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 17401fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox unregister_blkdev: 1741b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 17421fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kill_kthread: 17431fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 1744b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox return result; 1745b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1746b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1747b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxstatic void __exit nvme_exit(void) 1748b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox{ 1749b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox pci_unregister_driver(&nvme_driver); 1750b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox unregister_blkdev(nvme_major, "nvme"); 17511fa6aeadf18aeebd7a217d7a3a933856448375b6Matthew Wilcox kthread_stop(nvme_thread); 1752b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox} 1753b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcox 1754b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_AUTHOR("Matthew Wilcox <willy@linux.intel.com>"); 1755b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew WilcoxMODULE_LICENSE("GPL"); 1756366e8217e5ec6ce9f73aec19c46d983110fb4a98Matthew WilcoxMODULE_VERSION("0.8"); 1757b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_init(nvme_init); 1758b60503ba432b16fc84442a84e29a7aad2c0c363dMatthew Wilcoxmodule_exit(nvme_exit); 1759