forked from Minki/linux
mailbox: pcc: Move bulk of PCCT parsing into pcc_mbox_probe
Move the PCCT subspace parsing and allocation into pcc_mbox_probe so that we can get rid of global PCC channel and mailbox controller data. It also helps to make use of devm_* APIs for all the allocations. Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
This commit is contained in:
Sudeep Holla
Jassi Brar
parent
c45ded7e11
commit
ce028702dd
@ -63,8 +63,6 @@
|
||||
|
||||
#define MBOX_IRQ_NAME "pcc-mbox"
|
||||
|
||||
static struct mbox_chan *pcc_mbox_channels;
|
||||
|
||||
/**
|
||||
* struct pcc_chan_reg - PCC register bundle
|
||||
*
|
||||
@ -106,7 +104,7 @@ struct pcc_chan_info {
|
||||
|
||||
#define to_pcc_chan_info(c) container_of(c, struct pcc_chan_info, chan)
|
||||
static struct pcc_chan_info *chan_info;
|
||||
static struct mbox_controller pcc_mbox_ctrl = {};
|
||||
static int pcc_chan_count;
|
||||
|
||||
/*
|
||||
* PCC can be used with perf critical drivers such as CPPC
|
||||
@ -281,11 +279,11 @@ struct pcc_mbox_chan *
|
||||
pcc_mbox_request_channel(struct mbox_client *cl, int subspace_id)
|
||||
{
|
||||
struct pcc_chan_info *pchan;
|
||||
struct device *dev = pcc_mbox_ctrl.dev;
|
||||
struct mbox_chan *chan;
|
||||
struct device *dev;
|
||||
unsigned long flags;
|
||||
|
||||
if (subspace_id < 0 || subspace_id >= pcc_mbox_ctrl.num_chans)
|
||||
if (subspace_id < 0 || subspace_id >= pcc_chan_count)
|
||||
return ERR_PTR(-ENOENT);
|
||||
|
||||
pchan = chan_info + subspace_id;
|
||||
@ -294,6 +292,7 @@ pcc_mbox_request_channel(struct mbox_client *cl, int subspace_id)
|
||||
dev_err(dev, "Channel not found for idx: %d\n", subspace_id);
|
||||
return ERR_PTR(-EBUSY);
|
||||
}
|
||||
dev = chan->mbox->dev;
|
||||
|
||||
spin_lock_irqsave(&chan->lock, flags);
|
||||
chan->msg_free = 0;
|
||||
@ -576,16 +575,12 @@ static void pcc_parse_subspace_shmem(struct pcc_chan_info *pchan,
|
||||
*/
|
||||
static int __init acpi_pcc_probe(void)
|
||||
{
|
||||
int count, i, rc = 0;
|
||||
acpi_status status;
|
||||
struct acpi_table_header *pcct_tbl;
|
||||
struct acpi_subtable_header *pcct_entry;
|
||||
struct acpi_table_pcct *acpi_pcct_tbl;
|
||||
struct acpi_subtable_proc proc[ACPI_PCCT_TYPE_RESERVED];
|
||||
int count, i, rc;
|
||||
acpi_status status = AE_OK;
|
||||
|
||||
/* Search for PCCT */
|
||||
status = acpi_get_table(ACPI_SIG_PCCT, 0, &pcct_tbl);
|
||||
|
||||
if (ACPI_FAILURE(status) || !pcct_tbl)
|
||||
return -ENODEV;
|
||||
|
||||
@ -607,71 +602,12 @@ static int __init acpi_pcc_probe(void)
|
||||
pr_warn("Invalid PCCT: %d PCC subspaces\n", count);
|
||||
|
||||
rc = -EINVAL;
|
||||
goto err_put_pcct;
|
||||
} else {
|
||||
pcc_chan_count = count;
|
||||
}
|
||||
|
||||
pcc_mbox_channels = kcalloc(count, sizeof(struct mbox_chan),
|
||||
GFP_KERNEL);
|
||||
if (!pcc_mbox_channels) {
|
||||
pr_err("Could not allocate space for PCC mbox channels\n");
|
||||
rc = -ENOMEM;
|
||||
goto err_put_pcct;
|
||||
}
|
||||
|
||||
chan_info = kcalloc(count, sizeof(*chan_info), GFP_KERNEL);
|
||||
if (!chan_info) {
|
||||
rc = -ENOMEM;
|
||||
goto err_free_mbox;
|
||||
}
|
||||
|
||||
/* Point to the first PCC subspace entry */
|
||||
pcct_entry = (struct acpi_subtable_header *) (
|
||||
(unsigned long) pcct_tbl + sizeof(struct acpi_table_pcct));
|
||||
|
||||
acpi_pcct_tbl = (struct acpi_table_pcct *) pcct_tbl;
|
||||
if (acpi_pcct_tbl->flags & ACPI_PCCT_DOORBELL)
|
||||
pcc_mbox_ctrl.txdone_irq = true;
|
||||
|
||||
for (i = 0; i < count; i++) {
|
||||
struct pcc_chan_info *pchan = chan_info + i;
|
||||
|
||||
pcc_mbox_channels[i].con_priv = pchan;
|
||||
pchan->chan.mchan = &pcc_mbox_channels[i];
|
||||
|
||||
if (pcct_entry->type == ACPI_PCCT_TYPE_EXT_PCC_SLAVE_SUBSPACE &&
|
||||
!pcc_mbox_ctrl.txdone_irq) {
|
||||
pr_err("Plaform Interrupt flag must be set to 1");
|
||||
rc = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (pcc_mbox_ctrl.txdone_irq) {
|
||||
rc = pcc_parse_subspace_irq(pchan, pcct_entry);
|
||||
if (rc < 0)
|
||||
goto err;
|
||||
}
|
||||
rc = pcc_parse_subspace_db_reg(pchan, pcct_entry);
|
||||
if (rc < 0)
|
||||
goto err;
|
||||
|
||||
pcc_parse_subspace_shmem(pchan, pcct_entry);
|
||||
|
||||
pcct_entry = (struct acpi_subtable_header *)
|
||||
((unsigned long) pcct_entry + pcct_entry->length);
|
||||
}
|
||||
|
||||
pcc_mbox_ctrl.num_chans = count;
|
||||
|
||||
pr_info("Detected %d PCC Subspaces\n", pcc_mbox_ctrl.num_chans);
|
||||
|
||||
return 0;
|
||||
|
||||
err:
|
||||
kfree(chan_info);
|
||||
err_free_mbox:
|
||||
kfree(pcc_mbox_channels);
|
||||
err_put_pcct:
|
||||
acpi_put_table(pcct_tbl);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
@ -688,21 +624,93 @@ err_put_pcct:
|
||||
*/
|
||||
static int pcc_mbox_probe(struct platform_device *pdev)
|
||||
{
|
||||
int ret = 0;
|
||||
struct device *dev = &pdev->dev;
|
||||
struct mbox_controller *pcc_mbox_ctrl;
|
||||
struct mbox_chan *pcc_mbox_channels;
|
||||
struct acpi_table_header *pcct_tbl;
|
||||
struct acpi_subtable_header *pcct_entry;
|
||||
struct acpi_table_pcct *acpi_pcct_tbl;
|
||||
acpi_status status = AE_OK;
|
||||
int i, rc, count = pcc_chan_count;
|
||||
|
||||
pcc_mbox_ctrl.chans = pcc_mbox_channels;
|
||||
pcc_mbox_ctrl.ops = &pcc_chan_ops;
|
||||
pcc_mbox_ctrl.dev = &pdev->dev;
|
||||
/* Search for PCCT */
|
||||
status = acpi_get_table(ACPI_SIG_PCCT, 0, &pcct_tbl);
|
||||
|
||||
pr_info("Registering PCC driver as Mailbox controller\n");
|
||||
ret = mbox_controller_register(&pcc_mbox_ctrl);
|
||||
if (ACPI_FAILURE(status) || !pcct_tbl)
|
||||
return -ENODEV;
|
||||
|
||||
if (ret) {
|
||||
pr_err("Err registering PCC as Mailbox controller: %d\n", ret);
|
||||
ret = -ENODEV;
|
||||
pcc_mbox_channels = devm_kcalloc(dev, count, sizeof(*pcc_mbox_channels),
|
||||
GFP_KERNEL);
|
||||
if (!pcc_mbox_channels) {
|
||||
rc = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
|
||||
return ret;
|
||||
chan_info = devm_kcalloc(dev, count, sizeof(*chan_info), GFP_KERNEL);
|
||||
if (!chan_info) {
|
||||
rc = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
|
||||
pcc_mbox_ctrl = devm_kmalloc(dev, sizeof(*pcc_mbox_ctrl), GFP_KERNEL);
|
||||
if (!pcc_mbox_ctrl) {
|
||||
rc = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
|
||||
/* Point to the first PCC subspace entry */
|
||||
pcct_entry = (struct acpi_subtable_header *) (
|
||||
(unsigned long) pcct_tbl + sizeof(struct acpi_table_pcct));
|
||||
|
||||
acpi_pcct_tbl = (struct acpi_table_pcct *) pcct_tbl;
|
||||
if (acpi_pcct_tbl->flags & ACPI_PCCT_DOORBELL)
|
||||
pcc_mbox_ctrl->txdone_irq = true;
|
||||
|
||||
for (i = 0; i < count; i++) {
|
||||
struct pcc_chan_info *pchan = chan_info + i;
|
||||
|
||||
pcc_mbox_channels[i].con_priv = pchan;
|
||||
pchan->chan.mchan = &pcc_mbox_channels[i];
|
||||
|
||||
if (pcct_entry->type == ACPI_PCCT_TYPE_EXT_PCC_SLAVE_SUBSPACE &&
|
||||
!pcc_mbox_ctrl->txdone_irq) {
|
||||
pr_err("Plaform Interrupt flag must be set to 1");
|
||||
rc = -EINVAL;
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (pcc_mbox_ctrl->txdone_irq) {
|
||||
rc = pcc_parse_subspace_irq(pchan, pcct_entry);
|
||||
if (rc < 0)
|
||||
goto err;
|
||||
}
|
||||
rc = pcc_parse_subspace_db_reg(pchan, pcct_entry);
|
||||
if (rc < 0)
|
||||
goto err;
|
||||
|
||||
pcc_parse_subspace_shmem(pchan, pcct_entry);
|
||||
|
||||
pcct_entry = (struct acpi_subtable_header *)
|
||||
((unsigned long) pcct_entry + pcct_entry->length);
|
||||
}
|
||||
|
||||
pcc_mbox_ctrl->num_chans = count;
|
||||
|
||||
pr_info("Detected %d PCC Subspaces\n", pcc_mbox_ctrl->num_chans);
|
||||
|
||||
pcc_mbox_ctrl->chans = pcc_mbox_channels;
|
||||
pcc_mbox_ctrl->ops = &pcc_chan_ops;
|
||||
pcc_mbox_ctrl->dev = dev;
|
||||
|
||||
pr_info("Registering PCC driver as Mailbox controller\n");
|
||||
rc = mbox_controller_register(pcc_mbox_ctrl);
|
||||
if (rc)
|
||||
pr_err("Err registering PCC as Mailbox controller: %d\n", rc);
|
||||
else
|
||||
return 0;
|
||||
err:
|
||||
acpi_put_table(pcct_tbl);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static struct platform_driver pcc_mbox_driver = {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user