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PCI: endpoint: Add support to poll early for host commands

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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>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Kishon Vijay Abraham I 2017-08-18 20:28:00 +05:30 committed by Bjorn Helgaas
parent 3235b99495
commit 702a3ed9d6
1 changed files with 11 additions and 1 deletions
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12
drivers/pci/endpoint/functions/pci-epf-test.c
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@ -55,6 +55,7 @@ struct pci_epf_test {
void *reg[6]; void *reg[6];
struct pci_epf *epf; struct pci_epf *epf;
enum pci_barno test_reg_bar; enum pci_barno test_reg_bar;
bool linkup_notifier;
struct delayed_work cmd_handler; struct delayed_work cmd_handler;
}; };
@ -77,6 +78,7 @@ static struct pci_epf_header test_header = {
struct pci_epf_test_data { struct pci_epf_test_data {
enum pci_barno test_reg_bar; enum pci_barno test_reg_bar;
bool linkup_notifier;
}; };
static int bar_size[] = { 512, 512, 1024, 16384, 131072, 1048576 }; 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) static int pci_epf_test_bind(struct pci_epf *epf)
{ {
int ret; int ret;
struct pci_epf_test *epf_test = epf_get_drvdata(epf);
struct pci_epf_header *header = epf->header; struct pci_epf_header *header = epf->header;
struct pci_epc *epc = epf->epc; struct pci_epc *epc = epf->epc;
struct device *dev = &epf->dev; struct device *dev = &epf->dev;
@ -449,6 +452,9 @@ static int pci_epf_test_bind(struct pci_epf *epf)
if (ret) if (ret)
return ret; return ret;
if (!epf_test->linkup_notifier)
queue_work(kpcitest_workqueue, &epf_test->cmd_handler.work);
return 0; return 0;
} }
@ -466,11 +472,14 @@ static int pci_epf_test_probe(struct pci_epf *epf)
const struct pci_epf_device_id *match; const struct pci_epf_device_id *match;
struct pci_epf_test_data *data; struct pci_epf_test_data *data;
enum pci_barno test_reg_bar = BAR_0; enum pci_barno test_reg_bar = BAR_0;
bool linkup_notifier = true;
match = pci_epf_match_device(pci_epf_test_ids, epf); match = pci_epf_match_device(pci_epf_test_ids, epf);
data = (struct pci_epf_test_data *)match->driver_data; data = (struct pci_epf_test_data *)match->driver_data;
if (data) if (data) {
test_reg_bar = data->test_reg_bar; test_reg_bar = data->test_reg_bar;
linkup_notifier = data->linkup_notifier;
}
epf_test = devm_kzalloc(dev, sizeof(*epf_test), GFP_KERNEL); epf_test = devm_kzalloc(dev, sizeof(*epf_test), GFP_KERNEL);
if (!epf_test) if (!epf_test)
@ -479,6 +488,7 @@ static int pci_epf_test_probe(struct pci_epf *epf)
epf->header = &test_header; epf->header = &test_header;
epf_test->epf = epf; epf_test->epf = epf;
epf_test->test_reg_bar = test_reg_bar; 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); INIT_DELAYED_WORK(&epf_test->cmd_handler, pci_epf_test_cmd_handler);