diff options
| author | Christoph Hellwig <hch@lst.de> | 2015-11-28 15:01:09 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2015-12-01 10:59:39 -0700 |
| commit | 1b2eb374651f0496b86ed5f095d4c448bff214fa (patch) | |
| tree | 5ab852af3f6fe903d5b35e877e293046afa0fdc1 /drivers/nvme | |
| parent | 106198edb74cdf3fe1aefa6ad1e199b58ab7c4cb (diff) | |
| download | blackbird-obmc-linux-1b2eb374651f0496b86ed5f095d4c448bff214fa.tar.gz blackbird-obmc-linux-1b2eb374651f0496b86ed5f095d4c448bff214fa.zip | |
nvme: move remaining CC setup into nvme_enable_ctrl
Remove the calculation of all the bits written into the CC register into
nvme_enable_ctrl, so that they can be moved into the core NVMe driver in
the future.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/pci.c | 44 |
1 files changed, 21 insertions, 23 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 27d74490ff87..1ae94cd74702 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -1446,8 +1446,28 @@ static int nvme_disable_ctrl(struct nvme_dev *dev, u64 cap) static int nvme_enable_ctrl(struct nvme_dev *dev, u64 cap) { - dev->ctrl_config &= ~NVME_CC_SHN_MASK; + /* + * Default to a 4K page size, with the intention to update this + * path in the future to accomodate architectures with differing + * kernel and IO page sizes. + */ + unsigned dev_page_min = NVME_CAP_MPSMIN(cap) + 12, page_shift = 12; + + if (page_shift < dev_page_min) { + dev_err(dev->dev, + "Minimum device page size %u too large for host (%u)\n", + 1 << dev_page_min, 1 << page_shift); + return -ENODEV; + } + + dev->page_size = 1 << page_shift; + + 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; dev->ctrl_config |= NVME_CC_ENABLE; + writel(dev->ctrl_config, dev->bar + NVME_REG_CC); return nvme_wait_ready(dev, cap, true); @@ -1541,21 +1561,6 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev) u32 aqa; u64 cap = lo_hi_readq(dev->bar + NVME_REG_CAP); struct nvme_queue *nvmeq; - /* - * default to a 4K page size, with the intention to update this - * path in the future to accomodate architectures with differing - * kernel and IO page sizes. - */ - unsigned page_shift = 12; - unsigned dev_page_min = NVME_CAP_MPSMIN(cap) + 12; - - if (page_shift < dev_page_min) { - dev_err(dev->dev, - "Minimum device page size (%u) too large for " - "host (%u)\n", 1 << dev_page_min, - 1 << page_shift); - return -ENODEV; - } dev->subsystem = readl(dev->bar + NVME_REG_VS) >= NVME_VS(1, 1) ? NVME_CAP_NSSRC(cap) : 0; @@ -1578,13 +1583,6 @@ static int nvme_configure_admin_queue(struct nvme_dev *dev) aqa = nvmeq->q_depth - 1; aqa |= aqa << 16; - dev->page_size = 1 << page_shift; - - 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; - writel(aqa, dev->bar + NVME_REG_AQA); lo_hi_writeq(nvmeq->sq_dma_addr, dev->bar + NVME_REG_ASQ); lo_hi_writeq(nvmeq->cq_dma_addr, dev->bar + NVME_REG_ACQ); |
