Commit ea0d856c authored by Gavin Shan's avatar Gavin Shan Committed by Michael Ellerman

powerpc/powernv: Functions to get/set PCI slot state

This exports 4 functions, which base on the corresponding OPAL
APIs to get/set PCI slot status. Those functions are going to
be used by PowerNV PCI hotplug driver:

   pnv_pci_get_device_tree()    opal_get_device_tree()
   pnv_pci_get_presence_state() opal_pci_get_presence_state()
   pnv_pci_get_power_state()    opal_pci_get_power_state()
   pnv_pci_set_power_state()    opal_pci_set_power_state()
Signed-off-by: default avatarGavin Shan <gwshan@linux.vnet.ibm.com>
Reviewed-by: default avatarAlexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 7e19bf32
...@@ -158,7 +158,11 @@ ...@@ -158,7 +158,11 @@
#define OPAL_LEDS_SET_INDICATOR 115 #define OPAL_LEDS_SET_INDICATOR 115
#define OPAL_CEC_REBOOT2 116 #define OPAL_CEC_REBOOT2 116
#define OPAL_CONSOLE_FLUSH 117 #define OPAL_CONSOLE_FLUSH 117
#define OPAL_LAST 117 #define OPAL_GET_DEVICE_TREE 118
#define OPAL_PCI_GET_PRESENCE_STATE 119
#define OPAL_PCI_GET_POWER_STATE 120
#define OPAL_PCI_SET_POWER_STATE 121
#define OPAL_LAST 121
/* Device tree flags */ /* Device tree flags */
...@@ -344,6 +348,18 @@ enum OpalPciResetState { ...@@ -344,6 +348,18 @@ enum OpalPciResetState {
OPAL_ASSERT_RESET = 1 OPAL_ASSERT_RESET = 1
}; };
enum OpalPciSlotPresence {
OPAL_PCI_SLOT_EMPTY = 0,
OPAL_PCI_SLOT_PRESENT = 1
};
enum OpalPciSlotPower {
OPAL_PCI_SLOT_POWER_OFF = 0,
OPAL_PCI_SLOT_POWER_ON = 1,
OPAL_PCI_SLOT_OFFLINE = 2,
OPAL_PCI_SLOT_ONLINE = 3
};
enum OpalSlotLedType { enum OpalSlotLedType {
OPAL_SLOT_LED_TYPE_ID = 0, /* IDENTIFY LED */ OPAL_SLOT_LED_TYPE_ID = 0, /* IDENTIFY LED */
OPAL_SLOT_LED_TYPE_FAULT = 1, /* FAULT LED */ OPAL_SLOT_LED_TYPE_FAULT = 1, /* FAULT LED */
......
...@@ -209,6 +209,12 @@ int64_t opal_flash_write(uint64_t id, uint64_t offset, uint64_t buf, ...@@ -209,6 +209,12 @@ int64_t opal_flash_write(uint64_t id, uint64_t offset, uint64_t buf,
uint64_t size, uint64_t token); uint64_t size, uint64_t token);
int64_t opal_flash_erase(uint64_t id, uint64_t offset, uint64_t size, int64_t opal_flash_erase(uint64_t id, uint64_t offset, uint64_t size,
uint64_t token); uint64_t token);
int64_t opal_get_device_tree(uint32_t phandle, uint64_t buf, uint64_t len);
int64_t opal_pci_get_presence_state(uint64_t id, uint64_t data);
int64_t opal_pci_get_power_state(uint64_t id, uint64_t data);
int64_t opal_pci_set_power_state(uint64_t async_token, uint64_t id,
uint64_t data);
int64_t opal_pci_poll2(uint64_t id, uint64_t data);
/* Internal functions */ /* Internal functions */
extern int early_init_dt_scan_opal(unsigned long node, const char *uname, extern int early_init_dt_scan_opal(unsigned long node, const char *uname,
......
...@@ -12,12 +12,18 @@ ...@@ -12,12 +12,18 @@
#include <linux/pci.h> #include <linux/pci.h>
#include <misc/cxl-base.h> #include <misc/cxl-base.h>
#include <asm/opal-api.h>
#define PCI_SLOT_ID_PREFIX 0x8000000000000000 #define PCI_SLOT_ID_PREFIX 0x8000000000000000
#define PCI_SLOT_ID(phb_id, bdfn) \ #define PCI_SLOT_ID(phb_id, bdfn) \
(PCI_SLOT_ID_PREFIX | ((uint64_t)(bdfn) << 16) | (phb_id)) (PCI_SLOT_ID_PREFIX | ((uint64_t)(bdfn) << 16) | (phb_id))
extern int pnv_pci_get_slot_id(struct device_node *np, uint64_t *id); extern int pnv_pci_get_slot_id(struct device_node *np, uint64_t *id);
extern int pnv_pci_get_device_tree(uint32_t phandle, void *buf, uint64_t len);
extern int pnv_pci_get_presence_state(uint64_t id, uint8_t *state);
extern int pnv_pci_get_power_state(uint64_t id, uint8_t *state);
extern int pnv_pci_set_power_state(uint64_t id, uint8_t state,
struct opal_msg *msg);
int pnv_phb_to_cxl_mode(struct pci_dev *dev, uint64_t mode); int pnv_phb_to_cxl_mode(struct pci_dev *dev, uint64_t mode);
int pnv_cxl_ioda_msi_setup(struct pci_dev *dev, unsigned int hwirq, int pnv_cxl_ioda_msi_setup(struct pci_dev *dev, unsigned int hwirq,
......
...@@ -302,3 +302,7 @@ OPAL_CALL(opal_prd_msg, OPAL_PRD_MSG); ...@@ -302,3 +302,7 @@ OPAL_CALL(opal_prd_msg, OPAL_PRD_MSG);
OPAL_CALL(opal_leds_get_ind, OPAL_LEDS_GET_INDICATOR); OPAL_CALL(opal_leds_get_ind, OPAL_LEDS_GET_INDICATOR);
OPAL_CALL(opal_leds_set_ind, OPAL_LEDS_SET_INDICATOR); OPAL_CALL(opal_leds_set_ind, OPAL_LEDS_SET_INDICATOR);
OPAL_CALL(opal_console_flush, OPAL_CONSOLE_FLUSH); OPAL_CALL(opal_console_flush, OPAL_CONSOLE_FLUSH);
OPAL_CALL(opal_get_device_tree, OPAL_GET_DEVICE_TREE);
OPAL_CALL(opal_pci_get_presence_state, OPAL_PCI_GET_PRESENCE_STATE);
OPAL_CALL(opal_pci_get_power_state, OPAL_PCI_GET_POWER_STATE);
OPAL_CALL(opal_pci_set_power_state, OPAL_PCI_SET_POWER_STATE);
...@@ -74,6 +74,88 @@ int pnv_pci_get_slot_id(struct device_node *np, uint64_t *id) ...@@ -74,6 +74,88 @@ int pnv_pci_get_slot_id(struct device_node *np, uint64_t *id)
} }
EXPORT_SYMBOL_GPL(pnv_pci_get_slot_id); EXPORT_SYMBOL_GPL(pnv_pci_get_slot_id);
int pnv_pci_get_device_tree(uint32_t phandle, void *buf, uint64_t len)
{
int64_t rc;
if (!opal_check_token(OPAL_GET_DEVICE_TREE))
return -ENXIO;
rc = opal_get_device_tree(phandle, (uint64_t)buf, len);
if (rc < OPAL_SUCCESS)
return -EIO;
return rc;
}
EXPORT_SYMBOL_GPL(pnv_pci_get_device_tree);
int pnv_pci_get_presence_state(uint64_t id, uint8_t *state)
{
int64_t rc;
if (!opal_check_token(OPAL_PCI_GET_PRESENCE_STATE))
return -ENXIO;
rc = opal_pci_get_presence_state(id, (uint64_t)state);
if (rc != OPAL_SUCCESS)
return -EIO;
return 0;
}
EXPORT_SYMBOL_GPL(pnv_pci_get_presence_state);
int pnv_pci_get_power_state(uint64_t id, uint8_t *state)
{
int64_t rc;
if (!opal_check_token(OPAL_PCI_GET_POWER_STATE))
return -ENXIO;
rc = opal_pci_get_power_state(id, (uint64_t)state);
if (rc != OPAL_SUCCESS)
return -EIO;
return 0;
}
EXPORT_SYMBOL_GPL(pnv_pci_get_power_state);
int pnv_pci_set_power_state(uint64_t id, uint8_t state, struct opal_msg *msg)
{
struct opal_msg m;
int token, ret;
int64_t rc;
if (!opal_check_token(OPAL_PCI_SET_POWER_STATE))
return -ENXIO;
token = opal_async_get_token_interruptible();
if (unlikely(token < 0))
return token;
rc = opal_pci_set_power_state(token, id, (uint64_t)&state);
if (rc == OPAL_SUCCESS) {
ret = 0;
goto exit;
} else if (rc != OPAL_ASYNC_COMPLETION) {
ret = -EIO;
goto exit;
}
ret = opal_async_wait_response(token, &m);
if (ret < 0)
goto exit;
if (msg) {
ret = 1;
memcpy(msg, &m, sizeof(m));
}
exit:
opal_async_release_token(token);
return ret;
}
EXPORT_SYMBOL_GPL(pnv_pci_set_power_state);
#ifdef CONFIG_PCI_MSI #ifdef CONFIG_PCI_MSI
int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type) int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
{ {
......
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