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| author | Dan McLeran <daniel.mcleran@intel.com> | 2014-06-23 08:24:36 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-11-04 13:17:07 -0700 |
| commit | 01079522f94b3a1c87cfa375be3917d2da6e6363 (patch) | |
| tree | a8553ed6016b550c3b5472075f7d1c9486eef352 /drivers/block/nvme-core.c | |
| parent | 1d0906246095184d1624c643c2088152d330c40a (diff) | |
| download | linux-stable-01079522f94b3a1c87cfa375be3917d2da6e6363.tar.gz linux-stable-01079522f94b3a1c87cfa375be3917d2da6e6363.tar.bz2 linux-stable-01079522f94b3a1c87cfa375be3917d2da6e6363.zip | |
NVMe: Change nvme_enable_ctrl to set EN and manage CC thru ctrl_config.
Change the behavior of nvme_enable_ctrl to set EN.
Clear CC.SH for both nvme_enable_ctrl and nvme_disable_ctrl.
Remove reading of the CC register and manage the state in
dev->ctrl_config.
Signed-off-by: Dan McLeran <daniel.mcleran@intel.com>
[removed an unwanted write to CC]
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/block/nvme-core.c')
| -rw-r--r-- | drivers/block/nvme-core.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c index e60bb0fec7e3..0a98de813a12 100644 --- a/drivers/block/nvme-core.c +++ b/drivers/block/nvme-core.c @@ -1422,25 +1422,30 @@ static int nvme_wait_ready(struct nvme_dev *dev, u64 cap, bool enabled) */ static int nvme_disable_ctrl(struct nvme_dev *dev, u64 cap) { - u32 cc = readl(&dev->bar->cc); + dev->ctrl_config &= ~NVME_CC_SHN_MASK; + dev->ctrl_config &= ~NVME_CC_ENABLE; + writel(dev->ctrl_config, &dev->bar->cc); - if (cc & NVME_CC_ENABLE) - writel(cc & ~NVME_CC_ENABLE, &dev->bar->cc); return nvme_wait_ready(dev, cap, false); } static int nvme_enable_ctrl(struct nvme_dev *dev, u64 cap) { + dev->ctrl_config &= ~NVME_CC_SHN_MASK; + dev->ctrl_config |= NVME_CC_ENABLE; + writel(dev->ctrl_config, &dev->bar->cc); + return nvme_wait_ready(dev, cap, true); } static int nvme_shutdown_ctrl(struct nvme_dev *dev) { unsigned long timeout; - u32 cc; - cc = (readl(&dev->bar->cc) & ~NVME_CC_SHN_MASK) | NVME_CC_SHN_NORMAL; - writel(cc, &dev->bar->cc); + dev->ctrl_config &= ~NVME_CC_SHN_MASK; + dev->ctrl_config |= NVME_CC_SHN_NORMAL; + + writel(dev->ctrl_config, &dev->bar->cc); timeout = 2 * HZ + jiffies; while ((readl(&dev->bar->csts) & NVME_CSTS_SHST_MASK) != @@ -1499,7 +1504,7 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev) dev->page_size = 1 << page_shift; - dev->ctrl_config = NVME_CC_ENABLE | NVME_CC_CSS_NVM; + dev->ctrl_config = NVME_CC_CSS_NVM; dev->ctrl_config |= (page_shift - 12) << NVME_CC_MPS_SHIFT; dev->ctrl_config |= NVME_CC_ARB_RR | NVME_CC_SHN_NONE; dev->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; @@ -1507,7 +1512,6 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev) writel(aqa, &dev->bar->aqa); writeq(nvmeq->sq_dma_addr, &dev->bar->asq); writeq(nvmeq->cq_dma_addr, &dev->bar->acq); - writel(dev->ctrl_config, &dev->bar->cc); result = nvme_enable_ctrl(dev, cap); if (result) |