[PATCH][11/12] InfiniBand/mthca: clean up ioremap()/request_region() usage
From: Roland Dreier
Date: Mon Jan 24 2005 - 01:31:40 EST
From: "Michael S. Tsirkin" <mst@xxxxxxxxxxxxxx>
Here are misc fixes for mthca mapping:
1. Thinkably, MSI tables or another region could fall between HCR
and ECR tables.
Thus its arguably wrong to map both tables in one region.
So, do it separately.
I think its also more readable to have ecr_base and access ecr there,
not access ecr with hcr pointer.
2. mthca_request_regions error handling was borken
(wrong order of cleanups). For example on all errors
pci_release_region was called which is wrong if the region
was not yet mapped. And other such cleanups.
3. Fixed some error messages too.
Signed-off-by: Roland Dreier <roland@xxxxxxxxxxx>
--- linux-bk.orig/drivers/infiniband/hw/mthca/mthca_eq.c 2005-01-23 20:51:23.740805592 -0800
+++ linux-bk/drivers/infiniband/hw/mthca/mthca_eq.c 2005-01-23 20:58:55.772086392 -0800
@@ -366,10 +366,11 @@
if (dev->eq_table.clr_mask)
writel(dev->eq_table.clr_mask, dev->eq_table.clr_int);
- if ((ecr = readl(dev->hcr + MTHCA_ECR_OFFSET + 4)) != 0) {
+ if ((ecr = readl(dev->ecr_base + 4)) != 0) {
work = 1;
- writel(ecr, dev->hcr + MTHCA_ECR_CLR_OFFSET + 4);
+ writel(ecr, dev->ecr_base +
+ MTHCA_ECR_CLR_BASE - MTHCA_ECR_BASE + 4);
for (i = 0; i < MTHCA_NUM_EQ; ++i)
if (ecr & dev->eq_table.eq[i].ecr_mask)
--- linux-bk.orig/drivers/infiniband/hw/mthca/mthca_main.c 2005-01-23 20:52:01.962994936 -0800
+++ linux-bk/drivers/infiniband/hw/mthca/mthca_main.c 2005-01-23 20:58:55.771086544 -0800
@@ -699,57 +699,83 @@
*/
if (!request_mem_region(pci_resource_start(pdev, 0) +
MTHCA_HCR_BASE,
- MTHCA_MAP_HCR_SIZE,
- DRV_NAME))
- return -EBUSY;
+ MTHCA_HCR_SIZE,
+ DRV_NAME)) {
+ err = -EBUSY;
+ goto err_hcr_failed;
+ }
+
+ if (!request_mem_region(pci_resource_start(pdev, 0) +
+ MTHCA_ECR_BASE,
+ MTHCA_MAP_ECR_SIZE,
+ DRV_NAME)) {
+ err = -EBUSY;
+ goto err_ecr_failed;
+ }
if (!request_mem_region(pci_resource_start(pdev, 0) +
MTHCA_CLR_INT_BASE,
MTHCA_CLR_INT_SIZE,
DRV_NAME)) {
err = -EBUSY;
- goto err_bar0_beg;
+ goto err_int_failed;
}
+
err = pci_request_region(pdev, 2, DRV_NAME);
if (err)
- goto err_bar0_end;
+ goto err_bar2_failed;
if (!ddr_hidden) {
err = pci_request_region(pdev, 4, DRV_NAME);
if (err)
- goto err_bar2;
+ goto err_bar4_failed;
}
return 0;
-err_bar0_beg:
- release_mem_region(pci_resource_start(pdev, 0) +
- MTHCA_HCR_BASE,
- MTHCA_MAP_HCR_SIZE);
+err_bar4_failed:
+
+ pci_release_region(pdev, 2);
+err_bar2_failed:
-err_bar0_end:
release_mem_region(pci_resource_start(pdev, 0) +
MTHCA_CLR_INT_BASE,
MTHCA_CLR_INT_SIZE);
+err_int_failed:
+
+ release_mem_region(pci_resource_start(pdev, 0) +
+ MTHCA_ECR_BASE,
+ MTHCA_MAP_ECR_SIZE);
+err_ecr_failed:
+
+ release_mem_region(pci_resource_start(pdev, 0) +
+ MTHCA_HCR_BASE,
+ MTHCA_HCR_SIZE);
+err_hcr_failed:
-err_bar2:
- pci_release_region(pdev, 2);
return err;
}
static void mthca_release_regions(struct pci_dev *pdev,
int ddr_hidden)
{
- release_mem_region(pci_resource_start(pdev, 0) +
- MTHCA_HCR_BASE,
- MTHCA_MAP_HCR_SIZE);
+ if (!ddr_hidden)
+ pci_release_region(pdev, 4);
+
+ pci_release_region(pdev, 2);
+
release_mem_region(pci_resource_start(pdev, 0) +
MTHCA_CLR_INT_BASE,
MTHCA_CLR_INT_SIZE);
- pci_release_region(pdev, 2);
- if (!ddr_hidden)
- pci_release_region(pdev, 4);
+
+ release_mem_region(pci_resource_start(pdev, 0) +
+ MTHCA_ECR_BASE,
+ MTHCA_MAP_ECR_SIZE);
+
+ release_mem_region(pci_resource_start(pdev, 0) +
+ MTHCA_HCR_BASE,
+ MTHCA_HCR_SIZE);
}
static int __devinit mthca_enable_msi_x(struct mthca_dev *mdev)
@@ -911,29 +937,39 @@
mdev->cmd.use_events = 0;
mthca_base = pci_resource_start(pdev, 0);
- mdev->hcr = ioremap(mthca_base + MTHCA_HCR_BASE, MTHCA_MAP_HCR_SIZE);
+ mdev->hcr = ioremap(mthca_base + MTHCA_HCR_BASE, MTHCA_HCR_SIZE);
if (!mdev->hcr) {
mthca_err(mdev, "Couldn't map command register, "
"aborting.\n");
err = -ENOMEM;
goto err_free_dev;
}
+
mdev->clr_base = ioremap(mthca_base + MTHCA_CLR_INT_BASE,
MTHCA_CLR_INT_SIZE);
if (!mdev->clr_base) {
- mthca_err(mdev, "Couldn't map command register, "
+ mthca_err(mdev, "Couldn't map interrupt clear register, "
"aborting.\n");
err = -ENOMEM;
goto err_iounmap;
}
+ mdev->ecr_base = ioremap(mthca_base + MTHCA_ECR_BASE,
+ MTHCA_ECR_SIZE + MTHCA_ECR_CLR_SIZE);
+ if (!mdev->ecr_base) {
+ mthca_err(mdev, "Couldn't map ecr register, "
+ "aborting.\n");
+ err = -ENOMEM;
+ goto err_iounmap_clr;
+ }
+
mthca_base = pci_resource_start(pdev, 2);
mdev->kar = ioremap(mthca_base + PAGE_SIZE * MTHCA_KAR_PAGE, PAGE_SIZE);
if (!mdev->kar) {
mthca_err(mdev, "Couldn't map kernel access region, "
"aborting.\n");
err = -ENOMEM;
- goto err_iounmap_clr;
+ goto err_iounmap_ecr;
}
err = mthca_tune_pci(mdev);
@@ -982,6 +1018,9 @@
err_iounmap_kar:
iounmap(mdev->kar);
+err_iounmap_ecr:
+ iounmap(mdev->ecr_base);
+
err_iounmap_clr:
iounmap(mdev->clr_base);
@@ -1033,6 +1072,7 @@
mthca_close_hca(mdev);
iounmap(mdev->hcr);
+ iounmap(mdev->ecr_base);
iounmap(mdev->clr_base);
if (mdev->mthca_flags & MTHCA_FLAG_MSI_X)
--- linux-bk.orig/drivers/infiniband/hw/mthca/mthca_config_reg.h 2005-01-23 08:30:41.000000000 -0800
+++ linux-bk/drivers/infiniband/hw/mthca/mthca_config_reg.h 2005-01-23 20:58:55.772086392 -0800
@@ -43,13 +43,8 @@
#define MTHCA_ECR_SIZE 0x00008
#define MTHCA_ECR_CLR_BASE 0x80708
#define MTHCA_ECR_CLR_SIZE 0x00008
-#define MTHCA_ECR_OFFSET (MTHCA_ECR_BASE - MTHCA_HCR_BASE)
-#define MTHCA_ECR_CLR_OFFSET (MTHCA_ECR_CLR_BASE - MTHCA_HCR_BASE)
+#define MTHCA_MAP_ECR_SIZE (MTHCA_ECR_SIZE + MTHCA_ECR_CLR_SIZE)
#define MTHCA_CLR_INT_BASE 0xf00d8
#define MTHCA_CLR_INT_SIZE 0x00008
-#define MTHCA_MAP_HCR_SIZE (MTHCA_ECR_CLR_BASE + \
- MTHCA_ECR_CLR_SIZE - \
- MTHCA_HCR_BASE)
-
#endif /* MTHCA_CONFIG_REG_H */
--- linux-bk.orig/drivers/infiniband/hw/mthca/mthca_dev.h 2005-01-23 20:39:02.036561776 -0800
+++ linux-bk/drivers/infiniband/hw/mthca/mthca_dev.h 2005-01-23 20:58:55.770086696 -0800
@@ -237,6 +237,7 @@
struct semaphore cap_mask_mutex;
void __iomem *hcr;
+ void __iomem *ecr_base;
void __iomem *clr_base;
void __iomem *kar;
-
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