[PATCH 08/18] PCI: endpoint: functions/pci-epf-test: Add support to poll early for host commands

Kishon Vijay Abraham I
2017-08-18T14:58:00Z

Certain platforms like TI's K2G doesn't support link-up notification. Add
support to poll early (without waiting for the linkup notification)
for commands from the host.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
drivers/pci/endpoint/functions/pci-epf-test.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c
index e378dae9e510..a0aea2500690 100644
--- a/drivers/pci/endpoint/functions/pci-epf-test.c
+++ b/drivers/pci/endpoint/functions/pci-epf-test.c
@@ -55,6 +55,7 @@ struct pci_epf_test {
void *reg[6];
struct pci_epf *epf;
enum pci_barno test_reg_bar;
+ bool linkup_notifier;
struct delayed_work cmd_handler;
};

@@ -77,6 +78,7 @@ static struct pci_epf_header test_header = {

struct pci_epf_test_data {
enum pci_barno test_reg_bar;
+ bool linkup_notifier;
};

static int bar_size[] = { 512, 512, 1024, 16384, 131072, 1048576 };
@@ -424,6 +426,7 @@ static int pci_epf_test_alloc_space(struct pci_epf *epf)
static int pci_epf_test_bind(struct pci_epf *epf)
{
int ret;
+ struct pci_epf_test *epf_test = epf_get_drvdata(epf);
struct pci_epf_header *header = epf->header;
struct pci_epc *epc = epf->epc;
struct device *dev = &epf->dev;
@@ -449,6 +452,9 @@ static int pci_epf_test_bind(struct pci_epf *epf)
if (ret)
return ret;

+ if (!epf_test->linkup_notifier)
+ queue_work(kpcitest_workqueue, &epf_test->cmd_handler.work);
+
return 0;
}

@@ -466,11 +472,14 @@ static int pci_epf_test_probe(struct pci_epf *epf)
const struct pci_epf_device_id *match;
struct pci_epf_test_data *data;
enum pci_barno test_reg_bar = BAR_0;
+ bool linkup_notifier = true;

match = pci_epf_match_device(pci_epf_test_ids, epf);
data = (struct pci_epf_test_data *)match->driver_data;
- if (data)
+ if (data) {
test_reg_bar = data->test_reg_bar;
+ linkup_notifier = data->linkup_notifier;
+ }

epf_test = devm_kzalloc(dev, sizeof(*epf_test), GFP_KERNEL);
if (!epf_test)
@@ -479,6 +488,7 @@ static int pci_epf_test_probe(struct pci_epf *epf)
epf->header = &test_header;
epf_test->epf = epf;
epf_test->test_reg_bar = test_reg_bar;
+ epf_test->linkup_notifier = linkup_notifier;

INIT_DELAYED_WORK(&epf_test->cmd_handler, pci_epf_test_cmd_handler);

--
2.11.0