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authorBjorn Helgaas <bhelgaas@google.com>2014-02-26 22:25:57 +0400
committerBjorn Helgaas <bhelgaas@google.com>2014-02-26 22:56:09 +0400
commit60f061e19311771e67a484184340e5359493f557 (patch)
treef72569d718ec4c23fea14337e77ac118e9eace9a /drivers/message
parent5c513bd580323dbe794270c5a96b65ba22f376eb (diff)
downloadlinux-60f061e19311771e67a484184340e5359493f557.tar.xz
i2o: Refactor i2o_iop_systab_set() PCI space allocation
Refactor the PCI space allocation in i2o_iop_systab_set(). This might improve readability slightly, but mainly it is to make the next patch simpler. No functional change. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/message')
-rw-r--r--drivers/message/i2o/iop.c89
1 files changed, 46 insertions, 43 deletions
diff --git a/drivers/message/i2o/iop.c b/drivers/message/i2o/iop.c
index 68aef58bf89c..bd971b1b88e3 100644
--- a/drivers/message/i2o/iop.c
+++ b/drivers/message/i2o/iop.c
@@ -652,6 +652,48 @@ static int i2o_iop_activate(struct i2o_controller *c)
return i2o_hrt_get(c);
};
+static void i2o_res_alloc(struct i2o_controller *c, unsigned long flags)
+{
+ i2o_status_block *sb = c->status_block.virt;
+ struct resource *root, *res = &c->mem_resource;
+ resource_size_t size, min, max, align;
+ int err;
+
+ res->name = c->pdev->bus->name;
+ res->flags = flags;
+ res->start = 0;
+ res->end = 0;
+ osm_info("%s: requires private memory resources.\n", c->name);
+ root = pci_find_parent_resource(c->pdev, res);
+ if (root == NULL) {
+ osm_warn("%s: Can't find parent resource!\n", c->name);
+ return;
+ }
+
+ if (flags & IORESOURCE_MEM) {
+ size = min = max = sb->desired_mem_size;
+ align = 1 << 20; /* unspecified, use 1Mb and play safe */
+ } else {
+ size = min = max = sb->desired_io_size;
+ align = 1 << 12; /* unspecified, use 4Kb and play safe */
+ }
+
+ err = allocate_resource(root, res, size, min, max, align, NULL, NULL);
+ if (err < 0)
+ return;
+
+ if (flags & IORESOURCE_MEM) {
+ c->mem_alloc = 1;
+ sb->current_mem_size = resource_size(res);
+ sb->current_mem_base = res->start;
+ } else if (flags & IORESOURCE_IO) {
+ c->io_alloc = 1;
+ sb->current_io_size = resource_size(res);
+ sb->current_io_base = res->start;
+ }
+ osm_info("%s: allocated PCI space %pR\n", c->name, res);
+}
+
/**
* i2o_iop_systab_set - Set the I2O System Table of the specified IOP
* @c: I2O controller to which the system table should be send
@@ -665,52 +707,13 @@ static int i2o_iop_systab_set(struct i2o_controller *c)
struct i2o_message *msg;
i2o_status_block *sb = c->status_block.virt;
struct device *dev = &c->pdev->dev;
- struct resource *root;
int rc;
- if (sb->current_mem_size < sb->desired_mem_size) {
- struct resource *res = &c->mem_resource;
- res->name = c->pdev->bus->name;
- res->flags = IORESOURCE_MEM;
- res->start = 0;
- res->end = 0;
- osm_info("%s: requires private memory resources.\n", c->name);
- root = pci_find_parent_resource(c->pdev, res);
- if (root == NULL)
- osm_warn("%s: Can't find parent resource!\n", c->name);
- if (root && allocate_resource(root, res, sb->desired_mem_size, sb->desired_mem_size, sb->desired_mem_size, 1 << 20, /* Unspecified, so use 1Mb and play safe */
- NULL, NULL) >= 0) {
- c->mem_alloc = 1;
- sb->current_mem_size = resource_size(res);
- sb->current_mem_base = res->start;
- osm_info("%s: allocated %llu bytes of PCI memory at "
- "0x%016llX.\n", c->name,
- (unsigned long long)resource_size(res),
- (unsigned long long)res->start);
- }
- }
+ if (sb->current_mem_size < sb->desired_mem_size)
+ i2o_res_alloc(c, IORESOURCE_MEM);
- if (sb->current_io_size < sb->desired_io_size) {
- struct resource *res = &c->io_resource;
- res->name = c->pdev->bus->name;
- res->flags = IORESOURCE_IO;
- res->start = 0;
- res->end = 0;
- osm_info("%s: requires private memory resources.\n", c->name);
- root = pci_find_parent_resource(c->pdev, res);
- if (root == NULL)
- osm_warn("%s: Can't find parent resource!\n", c->name);
- if (root && allocate_resource(root, res, sb->desired_io_size, sb->desired_io_size, sb->desired_io_size, 1 << 12, /* Unspecified, so use 4Kb and play safe */
- NULL, NULL) >= 0) {
- c->io_alloc = 1;
- sb->current_io_size = resource_size(res);
- sb->current_io_base = res->start;
- osm_info("%s: allocated %llu bytes of PCI I/O at "
- "0x%016llX.\n", c->name,
- (unsigned long long)resource_size(res),
- (unsigned long long)res->start);
- }
- }
+ if (sb->current_io_size < sb->desired_io_size)
+ i2o_res_alloc(c, IORESOURCE_IO);
msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
if (IS_ERR(msg))