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Message-Id: <20200527094634.24240-5-maxg@mellanox.com>
Date: Wed, 27 May 2020 12:46:29 +0300
From: Max Gurtovoy <maxg@...lanox.com>
To: jgg@...lanox.com, dledford@...hat.com, leon@...nel.org,
galpress@...zon.com, dennis.dalessandro@...el.com,
netdev@...r.kernel.org, sagi@...mberg.me,
linux-rdma@...r.kernel.org, bvanassche@....org,
santosh.shilimkar@...cle.com, tom@...pey.com
Cc: aron.silverton@...cle.com, israelr@...lanox.com, oren@...lanox.com,
shlomin@...lanox.com, vladimirk@...lanox.com,
Max Gurtovoy <maxg@...lanox.com>
Subject: [PATCH 4/9] RDMA/mthca: remove FMR support for memory registration
Remove the ancient and unsafe FMR method.
Signed-off-by: Max Gurtovoy <maxg@...lanox.com>
---
drivers/infiniband/hw/mthca/mthca_dev.h | 10 -
drivers/infiniband/hw/mthca/mthca_mr.c | 262 +--------------------------
drivers/infiniband/hw/mthca/mthca_provider.c | 86 ---------
3 files changed, 1 insertion(+), 357 deletions(-)
diff --git a/drivers/infiniband/hw/mthca/mthca_dev.h b/drivers/infiniband/hw/mthca/mthca_dev.h
index 599794c..7550e9d 100644
--- a/drivers/infiniband/hw/mthca/mthca_dev.h
+++ b/drivers/infiniband/hw/mthca/mthca_dev.h
@@ -478,16 +478,6 @@ int mthca_mr_alloc_phys(struct mthca_dev *dev, u32 pd,
u32 access, struct mthca_mr *mr);
void mthca_free_mr(struct mthca_dev *dev, struct mthca_mr *mr);
-int mthca_fmr_alloc(struct mthca_dev *dev, u32 pd,
- u32 access, struct mthca_fmr *fmr);
-int mthca_tavor_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
- int list_len, u64 iova);
-void mthca_tavor_fmr_unmap(struct mthca_dev *dev, struct mthca_fmr *fmr);
-int mthca_arbel_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
- int list_len, u64 iova);
-void mthca_arbel_fmr_unmap(struct mthca_dev *dev, struct mthca_fmr *fmr);
-int mthca_free_fmr(struct mthca_dev *dev, struct mthca_fmr *fmr);
-
int mthca_map_eq_icm(struct mthca_dev *dev, u64 icm_virt);
void mthca_unmap_eq_icm(struct mthca_dev *dev);
diff --git a/drivers/infiniband/hw/mthca/mthca_mr.c b/drivers/infiniband/hw/mthca/mthca_mr.c
index 4250b2c..ce0e086 100644
--- a/drivers/infiniband/hw/mthca/mthca_mr.c
+++ b/drivers/infiniband/hw/mthca/mthca_mr.c
@@ -541,7 +541,7 @@ int mthca_mr_alloc_phys(struct mthca_dev *dev, u32 pd,
return err;
}
-/* Free mr or fmr */
+/* Free mr */
static void mthca_free_region(struct mthca_dev *dev, u32 lkey)
{
mthca_table_put(dev, dev->mr_table.mpt_table,
@@ -564,266 +564,6 @@ void mthca_free_mr(struct mthca_dev *dev, struct mthca_mr *mr)
mthca_free_mtt(dev, mr->mtt);
}
-int mthca_fmr_alloc(struct mthca_dev *dev, u32 pd,
- u32 access, struct mthca_fmr *mr)
-{
- struct mthca_mpt_entry *mpt_entry;
- struct mthca_mailbox *mailbox;
- u64 mtt_seg;
- u32 key, idx;
- int list_len = mr->attr.max_pages;
- int err = -ENOMEM;
- int i;
-
- if (mr->attr.page_shift < 12 || mr->attr.page_shift >= 32)
- return -EINVAL;
-
- /* For Arbel, all MTTs must fit in the same page. */
- if (mthca_is_memfree(dev) &&
- mr->attr.max_pages * sizeof *mr->mem.arbel.mtts > PAGE_SIZE)
- return -EINVAL;
-
- mr->maps = 0;
-
- key = mthca_alloc(&dev->mr_table.mpt_alloc);
- if (key == -1)
- return -ENOMEM;
- key = adjust_key(dev, key);
-
- idx = key & (dev->limits.num_mpts - 1);
- mr->ibmr.rkey = mr->ibmr.lkey = hw_index_to_key(dev, key);
-
- if (mthca_is_memfree(dev)) {
- err = mthca_table_get(dev, dev->mr_table.mpt_table, key);
- if (err)
- goto err_out_mpt_free;
-
- mr->mem.arbel.mpt = mthca_table_find(dev->mr_table.mpt_table, key, NULL);
- BUG_ON(!mr->mem.arbel.mpt);
- } else
- mr->mem.tavor.mpt = dev->mr_table.tavor_fmr.mpt_base +
- sizeof *(mr->mem.tavor.mpt) * idx;
-
- mr->mtt = __mthca_alloc_mtt(dev, list_len, dev->mr_table.fmr_mtt_buddy);
- if (IS_ERR(mr->mtt)) {
- err = PTR_ERR(mr->mtt);
- goto err_out_table;
- }
-
- mtt_seg = mr->mtt->first_seg * dev->limits.mtt_seg_size;
-
- if (mthca_is_memfree(dev)) {
- mr->mem.arbel.mtts = mthca_table_find(dev->mr_table.mtt_table,
- mr->mtt->first_seg,
- &mr->mem.arbel.dma_handle);
- BUG_ON(!mr->mem.arbel.mtts);
- } else
- mr->mem.tavor.mtts = dev->mr_table.tavor_fmr.mtt_base + mtt_seg;
-
- mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
- if (IS_ERR(mailbox)) {
- err = PTR_ERR(mailbox);
- goto err_out_free_mtt;
- }
-
- mpt_entry = mailbox->buf;
-
- mpt_entry->flags = cpu_to_be32(MTHCA_MPT_FLAG_SW_OWNS |
- MTHCA_MPT_FLAG_MIO |
- MTHCA_MPT_FLAG_REGION |
- access);
-
- mpt_entry->page_size = cpu_to_be32(mr->attr.page_shift - 12);
- mpt_entry->key = cpu_to_be32(key);
- mpt_entry->pd = cpu_to_be32(pd);
- memset(&mpt_entry->start, 0,
- sizeof *mpt_entry - offsetof(struct mthca_mpt_entry, start));
- mpt_entry->mtt_seg = cpu_to_be64(dev->mr_table.mtt_base + mtt_seg);
-
- if (0) {
- mthca_dbg(dev, "Dumping MPT entry %08x:\n", mr->ibmr.lkey);
- for (i = 0; i < sizeof (struct mthca_mpt_entry) / 4; ++i) {
- if (i % 4 == 0)
- printk("[%02x] ", i * 4);
- printk(" %08x", be32_to_cpu(((__be32 *) mpt_entry)[i]));
- if ((i + 1) % 4 == 0)
- printk("\n");
- }
- }
-
- err = mthca_SW2HW_MPT(dev, mailbox,
- key & (dev->limits.num_mpts - 1));
- if (err) {
- mthca_warn(dev, "SW2HW_MPT failed (%d)\n", err);
- goto err_out_mailbox_free;
- }
-
- mthca_free_mailbox(dev, mailbox);
- return 0;
-
-err_out_mailbox_free:
- mthca_free_mailbox(dev, mailbox);
-
-err_out_free_mtt:
- mthca_free_mtt(dev, mr->mtt);
-
-err_out_table:
- mthca_table_put(dev, dev->mr_table.mpt_table, key);
-
-err_out_mpt_free:
- mthca_free(&dev->mr_table.mpt_alloc, key);
- return err;
-}
-
-int mthca_free_fmr(struct mthca_dev *dev, struct mthca_fmr *fmr)
-{
- if (fmr->maps)
- return -EBUSY;
-
- mthca_free_region(dev, fmr->ibmr.lkey);
- mthca_free_mtt(dev, fmr->mtt);
-
- return 0;
-}
-
-static inline int mthca_check_fmr(struct mthca_fmr *fmr, u64 *page_list,
- int list_len, u64 iova)
-{
- int i, page_mask;
-
- if (list_len > fmr->attr.max_pages)
- return -EINVAL;
-
- page_mask = (1 << fmr->attr.page_shift) - 1;
-
- /* We are getting page lists, so va must be page aligned. */
- if (iova & page_mask)
- return -EINVAL;
-
- /* Trust the user not to pass misaligned data in page_list */
- if (0)
- for (i = 0; i < list_len; ++i) {
- if (page_list[i] & ~page_mask)
- return -EINVAL;
- }
-
- if (fmr->maps >= fmr->attr.max_maps)
- return -EINVAL;
-
- return 0;
-}
-
-
-int mthca_tavor_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
- int list_len, u64 iova)
-{
- struct mthca_fmr *fmr = to_mfmr(ibfmr);
- struct mthca_dev *dev = to_mdev(ibfmr->device);
- struct mthca_mpt_entry mpt_entry;
- u32 key;
- int i, err;
-
- err = mthca_check_fmr(fmr, page_list, list_len, iova);
- if (err)
- return err;
-
- ++fmr->maps;
-
- key = tavor_key_to_hw_index(fmr->ibmr.lkey);
- key += dev->limits.num_mpts;
- fmr->ibmr.lkey = fmr->ibmr.rkey = tavor_hw_index_to_key(key);
-
- writeb(MTHCA_MPT_STATUS_SW, fmr->mem.tavor.mpt);
-
- for (i = 0; i < list_len; ++i) {
- __be64 mtt_entry = cpu_to_be64(page_list[i] |
- MTHCA_MTT_FLAG_PRESENT);
- mthca_write64_raw(mtt_entry, fmr->mem.tavor.mtts + i);
- }
-
- mpt_entry.lkey = cpu_to_be32(key);
- mpt_entry.length = cpu_to_be64(list_len * (1ull << fmr->attr.page_shift));
- mpt_entry.start = cpu_to_be64(iova);
-
- __raw_writel((__force u32) mpt_entry.lkey, &fmr->mem.tavor.mpt->key);
- memcpy_toio(&fmr->mem.tavor.mpt->start, &mpt_entry.start,
- offsetof(struct mthca_mpt_entry, window_count) -
- offsetof(struct mthca_mpt_entry, start));
-
- writeb(MTHCA_MPT_STATUS_HW, fmr->mem.tavor.mpt);
-
- return 0;
-}
-
-int mthca_arbel_map_phys_fmr(struct ib_fmr *ibfmr, u64 *page_list,
- int list_len, u64 iova)
-{
- struct mthca_fmr *fmr = to_mfmr(ibfmr);
- struct mthca_dev *dev = to_mdev(ibfmr->device);
- u32 key;
- int i, err;
-
- err = mthca_check_fmr(fmr, page_list, list_len, iova);
- if (err)
- return err;
-
- ++fmr->maps;
-
- key = arbel_key_to_hw_index(fmr->ibmr.lkey);
- if (dev->mthca_flags & MTHCA_FLAG_SINAI_OPT)
- key += SINAI_FMR_KEY_INC;
- else
- key += dev->limits.num_mpts;
- fmr->ibmr.lkey = fmr->ibmr.rkey = arbel_hw_index_to_key(key);
-
- *(u8 *) fmr->mem.arbel.mpt = MTHCA_MPT_STATUS_SW;
-
- wmb();
-
- dma_sync_single_for_cpu(&dev->pdev->dev, fmr->mem.arbel.dma_handle,
- list_len * sizeof(u64), DMA_TO_DEVICE);
-
- for (i = 0; i < list_len; ++i)
- fmr->mem.arbel.mtts[i] = cpu_to_be64(page_list[i] |
- MTHCA_MTT_FLAG_PRESENT);
-
- dma_sync_single_for_device(&dev->pdev->dev, fmr->mem.arbel.dma_handle,
- list_len * sizeof(u64), DMA_TO_DEVICE);
-
- fmr->mem.arbel.mpt->key = cpu_to_be32(key);
- fmr->mem.arbel.mpt->lkey = cpu_to_be32(key);
- fmr->mem.arbel.mpt->length = cpu_to_be64(list_len * (1ull << fmr->attr.page_shift));
- fmr->mem.arbel.mpt->start = cpu_to_be64(iova);
-
- wmb();
-
- *(u8 *) fmr->mem.arbel.mpt = MTHCA_MPT_STATUS_HW;
-
- wmb();
-
- return 0;
-}
-
-void mthca_tavor_fmr_unmap(struct mthca_dev *dev, struct mthca_fmr *fmr)
-{
- if (!fmr->maps)
- return;
-
- fmr->maps = 0;
-
- writeb(MTHCA_MPT_STATUS_SW, fmr->mem.tavor.mpt);
-}
-
-void mthca_arbel_fmr_unmap(struct mthca_dev *dev, struct mthca_fmr *fmr)
-{
- if (!fmr->maps)
- return;
-
- fmr->maps = 0;
-
- *(u8 *) fmr->mem.arbel.mpt = MTHCA_MPT_STATUS_SW;
-}
-
int mthca_init_mr_table(struct mthca_dev *dev)
{
phys_addr_t addr;
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c b/drivers/infiniband/hw/mthca/mthca_provider.c
index 69a3e4f..9028df0 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.c
+++ b/drivers/infiniband/hw/mthca/mthca_provider.c
@@ -957,69 +957,6 @@ static int mthca_dereg_mr(struct ib_mr *mr, struct ib_udata *udata)
return 0;
}
-static struct ib_fmr *mthca_alloc_fmr(struct ib_pd *pd, int mr_access_flags,
- struct ib_fmr_attr *fmr_attr)
-{
- struct mthca_fmr *fmr;
- int err;
-
- fmr = kmalloc(sizeof *fmr, GFP_KERNEL);
- if (!fmr)
- return ERR_PTR(-ENOMEM);
-
- memcpy(&fmr->attr, fmr_attr, sizeof *fmr_attr);
- err = mthca_fmr_alloc(to_mdev(pd->device), to_mpd(pd)->pd_num,
- convert_access(mr_access_flags), fmr);
-
- if (err) {
- kfree(fmr);
- return ERR_PTR(err);
- }
-
- return &fmr->ibmr;
-}
-
-static int mthca_dealloc_fmr(struct ib_fmr *fmr)
-{
- struct mthca_fmr *mfmr = to_mfmr(fmr);
- int err;
-
- err = mthca_free_fmr(to_mdev(fmr->device), mfmr);
- if (err)
- return err;
-
- kfree(mfmr);
- return 0;
-}
-
-static int mthca_unmap_fmr(struct list_head *fmr_list)
-{
- struct ib_fmr *fmr;
- int err;
- struct mthca_dev *mdev = NULL;
-
- list_for_each_entry(fmr, fmr_list, list) {
- if (mdev && to_mdev(fmr->device) != mdev)
- return -EINVAL;
- mdev = to_mdev(fmr->device);
- }
-
- if (!mdev)
- return 0;
-
- if (mthca_is_memfree(mdev)) {
- list_for_each_entry(fmr, fmr_list, list)
- mthca_arbel_fmr_unmap(mdev, to_mfmr(fmr));
-
- wmb();
- } else
- list_for_each_entry(fmr, fmr_list, list)
- mthca_tavor_fmr_unmap(mdev, to_mfmr(fmr));
-
- err = mthca_SYNC_TPT(mdev);
- return err;
-}
-
static ssize_t hw_rev_show(struct device *device,
struct device_attribute *attr, char *buf)
{
@@ -1203,20 +1140,6 @@ static void get_dev_fw_str(struct ib_device *device, char *str)
INIT_RDMA_OBJ_SIZE(ib_srq, mthca_srq, ibsrq),
};
-static const struct ib_device_ops mthca_dev_arbel_fmr_ops = {
- .alloc_fmr = mthca_alloc_fmr,
- .dealloc_fmr = mthca_dealloc_fmr,
- .map_phys_fmr = mthca_arbel_map_phys_fmr,
- .unmap_fmr = mthca_unmap_fmr,
-};
-
-static const struct ib_device_ops mthca_dev_tavor_fmr_ops = {
- .alloc_fmr = mthca_alloc_fmr,
- .dealloc_fmr = mthca_dealloc_fmr,
- .map_phys_fmr = mthca_tavor_map_phys_fmr,
- .unmap_fmr = mthca_unmap_fmr,
-};
-
static const struct ib_device_ops mthca_dev_arbel_ops = {
.post_recv = mthca_arbel_post_receive,
.post_send = mthca_arbel_post_send,
@@ -1275,15 +1198,6 @@ int mthca_register_device(struct mthca_dev *dev)
&mthca_dev_tavor_srq_ops);
}
- if (dev->mthca_flags & MTHCA_FLAG_FMR) {
- if (mthca_is_memfree(dev))
- ib_set_device_ops(&dev->ib_dev,
- &mthca_dev_arbel_fmr_ops);
- else
- ib_set_device_ops(&dev->ib_dev,
- &mthca_dev_tavor_fmr_ops);
- }
-
ib_set_device_ops(&dev->ib_dev, &mthca_dev_ops);
if (mthca_is_memfree(dev))
--
1.8.3.1
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