IB/mthca: Use an enum for HCA page size
Use a named enum for the HCA's internal page size, rather than having
magic values of 4096 and shifts by 12 all over the code. Also, fix
one minor bug in EQ handling: only one HCA page is mapped to the HCA
during initialization, but a full kernel page is unmapped during
cleanup. This might cause problems when PAGE_SIZE != 4096.
Signed-off-by: Ishai Rabinovitz <ishai@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/mthca/mthca_cmd.c b/drivers/infiniband/hw/mthca/mthca_cmd.c
index d1e7ecb..948a286 100644
--- a/drivers/infiniband/hw/mthca/mthca_cmd.c
+++ b/drivers/infiniband/hw/mthca/mthca_cmd.c
@@ -652,8 +652,9 @@
* address or size and use that as our log2 size.
*/
lg = ffs(mthca_icm_addr(&iter) | mthca_icm_size(&iter)) - 1;
- if (lg < 12) {
- mthca_warn(dev, "Got FW area not aligned to 4K (%llx/%lx).\n",
+ if (lg < MTHCA_ICM_PAGE_SHIFT) {
+ mthca_warn(dev, "Got FW area not aligned to %d (%llx/%lx).\n",
+ MTHCA_ICM_PAGE_SIZE,
(unsigned long long) mthca_icm_addr(&iter),
mthca_icm_size(&iter));
err = -EINVAL;
@@ -665,8 +666,9 @@
virt += 1 << lg;
}
- pages[nent * 2 + 1] = cpu_to_be64((mthca_icm_addr(&iter) +
- (i << lg)) | (lg - 12));
+ pages[nent * 2 + 1] =
+ cpu_to_be64((mthca_icm_addr(&iter) + (i << lg)) |
+ (lg - MTHCA_ICM_PAGE_SHIFT));
ts += 1 << (lg - 10);
++tc;
@@ -822,12 +824,12 @@
mthca_dbg(dev, "FW size %d KB\n", dev->fw.arbel.fw_pages << 2);
/*
- * Arbel page size is always 4 KB; round up number of
- * system pages needed.
+ * Round up number of system pages needed in case
+ * MTHCA_ICM_PAGE_SIZE < PAGE_SIZE.
*/
dev->fw.arbel.fw_pages =
- ALIGN(dev->fw.arbel.fw_pages, PAGE_SIZE >> 12) >>
- (PAGE_SHIFT - 12);
+ ALIGN(dev->fw.arbel.fw_pages, PAGE_SIZE / MTHCA_ICM_PAGE_SIZE) >>
+ (PAGE_SHIFT - MTHCA_ICM_PAGE_SHIFT);
mthca_dbg(dev, "Clear int @ %llx, EQ arm @ %llx, EQ set CI @ %llx\n",
(unsigned long long) dev->fw.arbel.clr_int_base,
@@ -1540,11 +1542,11 @@
return ret;
/*
- * Arbel page size is always 4 KB; round up number of system
- * pages needed.
+ * Round up number of system pages needed in case
+ * MTHCA_ICM_PAGE_SIZE < PAGE_SIZE.
*/
- *aux_pages = (*aux_pages + (1 << (PAGE_SHIFT - 12)) - 1) >> (PAGE_SHIFT - 12);
- *aux_pages = ALIGN(*aux_pages, PAGE_SIZE >> 12) >> (PAGE_SHIFT - 12);
+ *aux_pages = ALIGN(*aux_pages, PAGE_SIZE / MTHCA_ICM_PAGE_SIZE) >>
+ (PAGE_SHIFT - MTHCA_ICM_PAGE_SHIFT);
return 0;
}
diff --git a/drivers/infiniband/hw/mthca/mthca_eq.c b/drivers/infiniband/hw/mthca/mthca_eq.c
index cf43a53..a44b12d 100644
--- a/drivers/infiniband/hw/mthca/mthca_eq.c
+++ b/drivers/infiniband/hw/mthca/mthca_eq.c
@@ -825,7 +825,7 @@
{
u8 status;
- mthca_UNMAP_ICM(dev, dev->eq_table.icm_virt, PAGE_SIZE / 4096, &status);
+ mthca_UNMAP_ICM(dev, dev->eq_table.icm_virt, 1, &status);
pci_unmap_page(dev->pdev, dev->eq_table.icm_dma, PAGE_SIZE,
PCI_DMA_BIDIRECTIONAL);
__free_page(dev->eq_table.icm_page);
diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.c b/drivers/infiniband/hw/mthca/mthca_memfree.c
index d709cb1..15cc2f6 100644
--- a/drivers/infiniband/hw/mthca/mthca_memfree.c
+++ b/drivers/infiniband/hw/mthca/mthca_memfree.c
@@ -202,7 +202,8 @@
if (--table->icm[i]->refcount == 0) {
mthca_UNMAP_ICM(dev, table->virt + i * MTHCA_TABLE_CHUNK_SIZE,
- MTHCA_TABLE_CHUNK_SIZE >> 12, &status);
+ MTHCA_TABLE_CHUNK_SIZE / MTHCA_ICM_PAGE_SIZE,
+ &status);
mthca_free_icm(dev, table->icm[i]);
table->icm[i] = NULL;
}
@@ -336,7 +337,8 @@
for (i = 0; i < num_icm; ++i)
if (table->icm[i]) {
mthca_UNMAP_ICM(dev, virt + i * MTHCA_TABLE_CHUNK_SIZE,
- MTHCA_TABLE_CHUNK_SIZE >> 12, &status);
+ MTHCA_TABLE_CHUNK_SIZE / MTHCA_ICM_PAGE_SIZE,
+ &status);
mthca_free_icm(dev, table->icm[i]);
}
@@ -353,7 +355,8 @@
for (i = 0; i < table->num_icm; ++i)
if (table->icm[i]) {
mthca_UNMAP_ICM(dev, table->virt + i * MTHCA_TABLE_CHUNK_SIZE,
- MTHCA_TABLE_CHUNK_SIZE >> 12, &status);
+ MTHCA_TABLE_CHUNK_SIZE / MTHCA_ICM_PAGE_SIZE,
+ &status);
mthca_free_icm(dev, table->icm[i]);
}
@@ -364,7 +367,7 @@
{
return dev->uar_table.uarc_base +
uar->index * dev->uar_table.uarc_size +
- page * 4096;
+ page * MTHCA_ICM_PAGE_SIZE;
}
int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
@@ -401,7 +404,7 @@
if (ret < 0)
goto out;
- db_tab->page[i].mem.length = 4096;
+ db_tab->page[i].mem.length = MTHCA_ICM_PAGE_SIZE;
db_tab->page[i].mem.offset = uaddr & ~PAGE_MASK;
ret = pci_map_sg(dev->pdev, &db_tab->page[i].mem, 1, PCI_DMA_TODEVICE);
@@ -455,7 +458,7 @@
if (!mthca_is_memfree(dev))
return NULL;
- npages = dev->uar_table.uarc_size / 4096;
+ npages = dev->uar_table.uarc_size / MTHCA_ICM_PAGE_SIZE;
db_tab = kmalloc(sizeof *db_tab + npages * sizeof *db_tab->page, GFP_KERNEL);
if (!db_tab)
return ERR_PTR(-ENOMEM);
@@ -478,7 +481,7 @@
if (!mthca_is_memfree(dev))
return;
- for (i = 0; i < dev->uar_table.uarc_size / 4096; ++i) {
+ for (i = 0; i < dev->uar_table.uarc_size / MTHCA_ICM_PAGE_SIZE; ++i) {
if (db_tab->page[i].uvirt) {
mthca_UNMAP_ICM(dev, mthca_uarc_virt(dev, uar, i), 1, &status);
pci_unmap_sg(dev->pdev, &db_tab->page[i].mem, 1, PCI_DMA_TODEVICE);
@@ -551,20 +554,20 @@
page = dev->db_tab->page + end;
alloc:
- page->db_rec = dma_alloc_coherent(&dev->pdev->dev, 4096,
+ page->db_rec = dma_alloc_coherent(&dev->pdev->dev, MTHCA_ICM_PAGE_SIZE,
&page->mapping, GFP_KERNEL);
if (!page->db_rec) {
ret = -ENOMEM;
goto out;
}
- memset(page->db_rec, 0, 4096);
+ memset(page->db_rec, 0, MTHCA_ICM_PAGE_SIZE);
ret = mthca_MAP_ICM_page(dev, page->mapping,
mthca_uarc_virt(dev, &dev->driver_uar, i), &status);
if (!ret && status)
ret = -EINVAL;
if (ret) {
- dma_free_coherent(&dev->pdev->dev, 4096,
+ dma_free_coherent(&dev->pdev->dev, MTHCA_ICM_PAGE_SIZE,
page->db_rec, page->mapping);
goto out;
}
@@ -612,7 +615,7 @@
i >= dev->db_tab->max_group1 - 1) {
mthca_UNMAP_ICM(dev, mthca_uarc_virt(dev, &dev->driver_uar, i), 1, &status);
- dma_free_coherent(&dev->pdev->dev, 4096,
+ dma_free_coherent(&dev->pdev->dev, MTHCA_ICM_PAGE_SIZE,
page->db_rec, page->mapping);
page->db_rec = NULL;
@@ -640,7 +643,7 @@
mutex_init(&dev->db_tab->mutex);
- dev->db_tab->npages = dev->uar_table.uarc_size / 4096;
+ dev->db_tab->npages = dev->uar_table.uarc_size / MTHCA_ICM_PAGE_SIZE;
dev->db_tab->max_group1 = 0;
dev->db_tab->min_group2 = dev->db_tab->npages - 1;
@@ -681,7 +684,7 @@
mthca_UNMAP_ICM(dev, mthca_uarc_virt(dev, &dev->driver_uar, i), 1, &status);
- dma_free_coherent(&dev->pdev->dev, 4096,
+ dma_free_coherent(&dev->pdev->dev, MTHCA_ICM_PAGE_SIZE,
dev->db_tab->page[i].db_rec,
dev->db_tab->page[i].mapping);
}
diff --git a/drivers/infiniband/hw/mthca/mthca_memfree.h b/drivers/infiniband/hw/mthca/mthca_memfree.h
index 36f1141..6d42947 100644
--- a/drivers/infiniband/hw/mthca/mthca_memfree.h
+++ b/drivers/infiniband/hw/mthca/mthca_memfree.h
@@ -45,6 +45,12 @@
((256 - sizeof (struct list_head) - 2 * sizeof (int)) / \
(sizeof (struct scatterlist)))
+enum {
+ MTHCA_ICM_PAGE_SHIFT = 12,
+ MTHCA_ICM_PAGE_SIZE = 1 << MTHCA_ICM_PAGE_SHIFT,
+ MTHCA_DB_REC_PER_PAGE = MTHCA_ICM_PAGE_SIZE / 8
+};
+
struct mthca_icm_chunk {
struct list_head list;
int npages;
@@ -131,10 +137,6 @@
return sg_dma_len(&iter->chunk->mem[iter->page_idx]);
}
-enum {
- MTHCA_DB_REC_PER_PAGE = 4096 / 8
-};
-
struct mthca_db_page {
DECLARE_BITMAP(used, MTHCA_DB_REC_PER_PAGE);
__be64 *db_rec;