[PATCH v4 4/4] switchtec: Add IOCTLs to the Switchtec driver

From: Logan Gunthorpe
Date: Fri Feb 24 2017 - 14:31:14 EST

This patch introduces a couple of special IOCTLs which are provided to:

* Inform userspace of firmware partition locations
* Pass event counts and allow userspace to wait on events
* Translate between PFF numbers used by the switch to
port numbers.

Signed-off-by: Logan Gunthorpe <logang@xxxxxxxxxxxx>
Signed-off-by: Stephen Bates <stephen.bates@xxxxxxxxxxxxx>
Tested-by: Krishna Dhulipala <krishnad@xxxxxx>
Reviewed-by: Wei Zhang <wzhang@xxxxxx>
Reviewed-by: Jens Axboe <axboe@xxxxxx>
---
Documentation/ioctl/ioctl-number.txt | 1 +
Documentation/switchtec.txt | 27 ++
MAINTAINERS | 1 +
drivers/pci/switch/switchtec.c | 467 +++++++++++++++++++++++++++++++++++
include/uapi/linux/switchtec_ioctl.h | 132 ++++++++++
5 files changed, 628 insertions(+)
create mode 100644 include/uapi/linux/switchtec_ioctl.h

diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt
index 81c7f2b..032b33c 100644
--- a/Documentation/ioctl/ioctl-number.txt
+++ b/Documentation/ioctl/ioctl-number.txt
@@ -191,6 +191,7 @@ Code Seq#(hex) Include File Comments
'W' 00-1F linux/watchdog.h conflict!
'W' 00-1F linux/wanrouter.h conflict! (pre 3.9)
'W' 00-3F sound/asound.h conflict!
+'W' 40-5F drivers/pci/switch/switchtec.c
'X' all fs/xfs/xfs_fs.h conflict!
and fs/xfs/linux-2.6/xfs_ioctl32.h
and include/linux/falloc.h
diff --git a/Documentation/switchtec.txt b/Documentation/switchtec.txt
index 4bced4c..a0a9c7b 100644
--- a/Documentation/switchtec.txt
+++ b/Documentation/switchtec.txt
@@ -51,3 +51,30 @@ The char device has the following semantics:

* The poll call will also be supported for userspace applications that
need to do other things while waiting for the command to complete.
+
+The following IOCTLs are also supported by the device:
+
+* SWITCHTEC_IOCTL_FLASH_INFO - Retrieve firmware length and number
+ of partitions in the device.
+
+* SWITCHTEC_IOCTL_FLASH_PART_INFO - Retrieve address and lengeth for
+ any specified partition in flash.
+
+* SWITCHTEC_IOCTL_EVENT_SUMMARY - Read a structure of bitmaps
+ indicating all uncleared events.
+
+* SWITCHTEC_IOCTL_EVENT_CTL - Get the current count, clear and set flags
+ for any event. This ioctl takes in a switchtec_ioctl_event_ctl struct
+ with the event_id, index and flags set (index being the partition or PFF
+ number for non-global events). It returns whether the event has
+ occurred, the number of times and any event specific data. The flags
+ can be used to clear the count or enable and disable actions to
+ happen when the event occurs.
+ By using the SWITCHTEC_IOCTL_EVENT_FLAG_EN_POLL flag,
+ you can set an event to trigger a poll command to return with
+ POLLPRI. In this way, userspace can wait for events to occur.
+
+* SWITCHTEC_IOCTL_PFF_TO_PORT and SWITCHTEC_IOCTL_PORT_TO_PFF convert
+ between PCI Function Framework number (used by the event system)
+ and Switchtec Logic Port ID and Partition number (which is more
+ user friendly).
diff --git a/MAINTAINERS b/MAINTAINERS
index 6fed938..c1a9a30 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9515,6 +9515,7 @@ S: Maintained
F: Documentation/switchtec.txt
F: Documentation/ABI/testing/sysfs-class-switchtec
F: drivers/pci/switch/switchtec*
+F: include/uapi/linux/switchtec_ioctl.h

PCI DRIVER FOR NVIDIA TEGRA
M: Thierry Reding <thierry.reding@xxxxxxxxx>
diff --git a/drivers/pci/switch/switchtec.c b/drivers/pci/switch/switchtec.c
index 2e3a45b..18286d3 100644
--- a/drivers/pci/switch/switchtec.c
+++ b/drivers/pci/switch/switchtec.c
@@ -13,6 +13,8 @@
*
*/

+#include <linux/switchtec_ioctl.h>
+
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/fs.h>
@@ -717,6 +719,417 @@ static unsigned int switchtec_dev_poll(struct file *filp, poll_table *wait)
return ret;
}

+static int ioctl_flash_info(struct switchtec_dev *stdev,
+ struct switchtec_ioctl_flash_info __user *uinfo)
+{
+ struct switchtec_ioctl_flash_info info = {0};
+ struct flash_info_regs __iomem *fi = stdev->mmio_flash_info;
+
+ info.flash_length = ioread32(&fi->flash_length);
+ info.num_partitions = SWITCHTEC_IOCTL_NUM_PARTITIONS;
+
+ if (copy_to_user(uinfo, &info, sizeof(info)))
+ return -EFAULT;
+
+ return 0;
+}
+
+static void set_fw_info_part(struct switchtec_ioctl_flash_part_info *info,
+ struct partition_info __iomem *pi)
+{
+ info->address = ioread32(&pi->address);
+ info->length = ioread32(&pi->length);
+}
+
+static int ioctl_flash_part_info(struct switchtec_dev *stdev,
+ struct switchtec_ioctl_flash_part_info __user *uinfo)
+{
+ struct switchtec_ioctl_flash_part_info info = {0};
+ struct flash_info_regs __iomem *fi = stdev->mmio_flash_info;
+ u32 active_addr = -1;
+
+ if (copy_from_user(&info, uinfo, sizeof(info)))
+ return -EFAULT;
+
+ switch (info.flash_partition) {
+ case SWITCHTEC_IOCTL_PART_CFG0:
+ active_addr = ioread32(&fi->active_cfg);
+ set_fw_info_part(&info, &fi->cfg0);
+ break;
+ case SWITCHTEC_IOCTL_PART_CFG1:
+ active_addr = ioread32(&fi->active_cfg);
+ set_fw_info_part(&info, &fi->cfg1);
+ break;
+ case SWITCHTEC_IOCTL_PART_IMG0:
+ active_addr = ioread32(&fi->active_img);
+ set_fw_info_part(&info, &fi->img0);
+ break;
+ case SWITCHTEC_IOCTL_PART_IMG1:
+ active_addr = ioread32(&fi->active_img);
+ set_fw_info_part(&info, &fi->img1);
+ break;
+ case SWITCHTEC_IOCTL_PART_NVLOG:
+ set_fw_info_part(&info, &fi->nvlog);
+ break;
+ case SWITCHTEC_IOCTL_PART_VENDOR0:
+ set_fw_info_part(&info, &fi->vendor[0]);
+ break;
+ case SWITCHTEC_IOCTL_PART_VENDOR1:
+ set_fw_info_part(&info, &fi->vendor[1]);
+ break;
+ case SWITCHTEC_IOCTL_PART_VENDOR2:
+ set_fw_info_part(&info, &fi->vendor[2]);
+ break;
+ case SWITCHTEC_IOCTL_PART_VENDOR3:
+ set_fw_info_part(&info, &fi->vendor[3]);
+ break;
+ case SWITCHTEC_IOCTL_PART_VENDOR4:
+ set_fw_info_part(&info, &fi->vendor[4]);
+ break;
+ case SWITCHTEC_IOCTL_PART_VENDOR5:
+ set_fw_info_part(&info, &fi->vendor[5]);
+ break;
+ case SWITCHTEC_IOCTL_PART_VENDOR6:
+ set_fw_info_part(&info, &fi->vendor[6]);
+ break;
+ case SWITCHTEC_IOCTL_PART_VENDOR7:
+ set_fw_info_part(&info, &fi->vendor[7]);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (info.address == active_addr)
+ info.active = 1;
+
+ if (copy_to_user(uinfo, &info, sizeof(info)))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int ioctl_event_summary(struct switchtec_dev *stdev,
+ struct switchtec_user *stuser,
+ struct switchtec_ioctl_event_summary __user *usum)
+{
+ struct switchtec_ioctl_event_summary s = {0};
+ int i;
+ u32 reg;
+
+ s.global = ioread32(&stdev->mmio_sw_event->global_summary);
+ s.part_bitmap = ioread32(&stdev->mmio_sw_event->part_event_bitmap);
+ s.local_part = ioread32(&stdev->mmio_part_cfg->part_event_summary);
+
+ for (i = 0; i < stdev->partition_count; i++) {
+ reg = ioread32(&stdev->mmio_part_cfg_all[i].part_event_summary);
+ s.part[i] = reg;
+ }
+
+ for (i = 0; i < SWITCHTEC_MAX_PFF_CSR; i++) {
+ reg = ioread16(&stdev->mmio_pff_csr[i].vendor_id);
+ if (reg != MICROSEMI_VENDOR_ID)
+ break;
+
+ reg = ioread32(&stdev->mmio_pff_csr[i].pff_event_summary);
+ s.pff[i] = reg;
+ }
+
+ if (copy_to_user(usum, &s, sizeof(s)))
+ return -EFAULT;
+
+ stuser->event_cnt = atomic_read(&stdev->event_cnt);
+
+ return 0;
+}
+
+static u32 __iomem *global_ev_reg(struct switchtec_dev *stdev,
+ size_t offset, int index)
+{
+ return (void __iomem *)stdev->mmio_sw_event + offset;
+}
+
+static u32 __iomem *part_ev_reg(struct switchtec_dev *stdev,
+ size_t offset, int index)
+{
+ return (void __iomem *)&stdev->mmio_part_cfg_all[index] + offset;
+}
+
+static u32 __iomem *pff_ev_reg(struct switchtec_dev *stdev,
+ size_t offset, int index)
+{
+ return (void __iomem *)&stdev->mmio_pff_csr[index] + offset;
+}
+
+#define EV_GLB(i, r)[i] = {offsetof(struct sw_event_regs, r), global_ev_reg}
+#define EV_PAR(i, r)[i] = {offsetof(struct part_cfg_regs, r), part_ev_reg}
+#define EV_PFF(i, r)[i] = {offsetof(struct pff_csr_regs, r), pff_ev_reg}
+
+const struct event_reg {
+ size_t offset;
+ u32 __iomem *(*map_reg)(struct switchtec_dev *stdev,
+ size_t offset, int index);
+} event_regs[] = {
+ EV_GLB(SWITCHTEC_IOCTL_EVENT_STACK_ERROR, stack_error_event_hdr),
+ EV_GLB(SWITCHTEC_IOCTL_EVENT_PPU_ERROR, ppu_error_event_hdr),
+ EV_GLB(SWITCHTEC_IOCTL_EVENT_ISP_ERROR, isp_error_event_hdr),
+ EV_GLB(SWITCHTEC_IOCTL_EVENT_SYS_RESET, sys_reset_event_hdr),
+ EV_GLB(SWITCHTEC_IOCTL_EVENT_FW_EXC, fw_exception_hdr),
+ EV_GLB(SWITCHTEC_IOCTL_EVENT_FW_NMI, fw_nmi_hdr),
+ EV_GLB(SWITCHTEC_IOCTL_EVENT_FW_NON_FATAL, fw_non_fatal_hdr),
+ EV_GLB(SWITCHTEC_IOCTL_EVENT_FW_FATAL, fw_fatal_hdr),
+ EV_GLB(SWITCHTEC_IOCTL_EVENT_TWI_MRPC_COMP, twi_mrpc_comp_hdr),
+ EV_GLB(SWITCHTEC_IOCTL_EVENT_TWI_MRPC_COMP_ASYNC,
+ twi_mrpc_comp_async_hdr),
+ EV_GLB(SWITCHTEC_IOCTL_EVENT_CLI_MRPC_COMP, cli_mrpc_comp_hdr),
+ EV_GLB(SWITCHTEC_IOCTL_EVENT_CLI_MRPC_COMP_ASYNC,
+ cli_mrpc_comp_async_hdr),
+ EV_GLB(SWITCHTEC_IOCTL_EVENT_GPIO_INT, gpio_interrupt_hdr),
+ EV_PAR(SWITCHTEC_IOCTL_EVENT_PART_RESET, part_reset_hdr),
+ EV_PAR(SWITCHTEC_IOCTL_EVENT_MRPC_COMP, mrpc_comp_hdr),
+ EV_PAR(SWITCHTEC_IOCTL_EVENT_MRPC_COMP_ASYNC, mrpc_comp_async_hdr),
+ EV_PAR(SWITCHTEC_IOCTL_EVENT_DYN_PART_BIND_COMP, dyn_binding_hdr),
+ EV_PFF(SWITCHTEC_IOCTL_EVENT_AER_IN_P2P, aer_in_p2p_hdr),
+ EV_PFF(SWITCHTEC_IOCTL_EVENT_AER_IN_VEP, aer_in_vep_hdr),
+ EV_PFF(SWITCHTEC_IOCTL_EVENT_DPC, dpc_hdr),
+ EV_PFF(SWITCHTEC_IOCTL_EVENT_CTS, cts_hdr),
+ EV_PFF(SWITCHTEC_IOCTL_EVENT_HOTPLUG, hotplug_hdr),
+ EV_PFF(SWITCHTEC_IOCTL_EVENT_IER, ier_hdr),
+ EV_PFF(SWITCHTEC_IOCTL_EVENT_THRESH, threshold_hdr),
+ EV_PFF(SWITCHTEC_IOCTL_EVENT_POWER_MGMT, power_mgmt_hdr),
+ EV_PFF(SWITCHTEC_IOCTL_EVENT_TLP_THROTTLING, tlp_throttling_hdr),
+ EV_PFF(SWITCHTEC_IOCTL_EVENT_FORCE_SPEED, force_speed_hdr),
+ EV_PFF(SWITCHTEC_IOCTL_EVENT_CREDIT_TIMEOUT, credit_timeout_hdr),
+ EV_PFF(SWITCHTEC_IOCTL_EVENT_LINK_STATE, link_state_hdr),
+};
+
+static u32 __iomem *event_hdr_addr(struct switchtec_dev *stdev,
+ int event_id, int index)
+{
+ size_t off;
+
+ if (event_id < 0 || event_id >= SWITCHTEC_IOCTL_MAX_EVENTS)
+ return ERR_PTR(-EINVAL);
+
+ off = event_regs[event_id].offset;
+
+ if (event_regs[event_id].map_reg == part_ev_reg) {
+ if (index == SWITCHTEC_IOCTL_EVENT_LOCAL_PART_IDX)
+ index = stdev->partition;
+ else if (index < 0 || index >= stdev->partition_count)
+ return ERR_PTR(-EINVAL);
+ } else if (event_regs[event_id].map_reg == pff_ev_reg) {
+ if (index < 0 || index >= stdev->pff_csr_count)
+ return ERR_PTR(-EINVAL);
+ }
+
+ return event_regs[event_id].map_reg(stdev, off, index);
+}
+
+static int event_ctl(struct switchtec_dev *stdev,
+ struct switchtec_ioctl_event_ctl *ctl)
+{
+ int i;
+ u32 __iomem *reg;
+ u32 hdr;
+
+ reg = event_hdr_addr(stdev, ctl->event_id, ctl->index);
+ if (IS_ERR(reg))
+ return PTR_ERR(reg);
+
+ hdr = ioread32(reg);
+ for (i = 0; i < ARRAY_SIZE(ctl->data); i++)
+ ctl->data[i] = ioread32(&reg[i + 1]);
+
+ ctl->occurred = hdr & SWITCHTEC_EVENT_OCCURRED;
+ ctl->count = (hdr >> 5) & 0xFF;
+
+ if (!(ctl->flags & SWITCHTEC_IOCTL_EVENT_FLAG_CLEAR))
+ hdr &= ~SWITCHTEC_EVENT_CLEAR;
+ if (ctl->flags & SWITCHTEC_IOCTL_EVENT_FLAG_EN_POLL)
+ hdr |= SWITCHTEC_EVENT_EN_IRQ;
+ if (ctl->flags & SWITCHTEC_IOCTL_EVENT_FLAG_DIS_POLL)
+ hdr &= ~SWITCHTEC_EVENT_EN_IRQ;
+ if (ctl->flags & SWITCHTEC_IOCTL_EVENT_FLAG_EN_LOG)
+ hdr |= SWITCHTEC_EVENT_EN_LOG;
+ if (ctl->flags & SWITCHTEC_IOCTL_EVENT_FLAG_DIS_LOG)
+ hdr &= ~SWITCHTEC_EVENT_EN_LOG;
+ if (ctl->flags & SWITCHTEC_IOCTL_EVENT_FLAG_EN_CLI)
+ hdr |= SWITCHTEC_EVENT_EN_CLI;
+ if (ctl->flags & SWITCHTEC_IOCTL_EVENT_FLAG_DIS_CLI)
+ hdr &= ~SWITCHTEC_EVENT_EN_CLI;
+ if (ctl->flags & SWITCHTEC_IOCTL_EVENT_FLAG_EN_FATAL)
+ hdr |= SWITCHTEC_EVENT_FATAL;
+ if (ctl->flags & SWITCHTEC_IOCTL_EVENT_FLAG_DIS_FATAL)
+ hdr &= ~SWITCHTEC_EVENT_FATAL;
+
+ if (ctl->flags)
+ iowrite32(hdr, reg);
+
+ ctl->flags = 0;
+ if (hdr & SWITCHTEC_EVENT_EN_IRQ)
+ ctl->flags |= SWITCHTEC_IOCTL_EVENT_FLAG_EN_POLL;
+ if (hdr & SWITCHTEC_EVENT_EN_LOG)
+ ctl->flags |= SWITCHTEC_IOCTL_EVENT_FLAG_EN_LOG;
+ if (hdr & SWITCHTEC_EVENT_EN_CLI)
+ ctl->flags |= SWITCHTEC_IOCTL_EVENT_FLAG_EN_CLI;
+ if (hdr & SWITCHTEC_EVENT_FATAL)
+ ctl->flags |= SWITCHTEC_IOCTL_EVENT_FLAG_EN_FATAL;
+
+ return 0;
+}
+
+static int ioctl_event_ctl(struct switchtec_dev *stdev,
+ struct switchtec_ioctl_event_ctl __user *uctl)
+{
+ int ret;
+ int nr_idxs;
+ struct switchtec_ioctl_event_ctl ctl;
+
+ if (copy_from_user(&ctl, uctl, sizeof(ctl)))
+ return -EFAULT;
+
+ if (ctl.event_id > SWITCHTEC_IOCTL_MAX_EVENTS)
+ return -EINVAL;
+
+ if (ctl.flags & SWITCHTEC_IOCTL_EVENT_FLAG_UNUSED)
+ return -EINVAL;
+
+ if (ctl.index == SWITCHTEC_IOCTL_EVENT_IDX_ALL) {
+ if (event_regs[ctl.event_id].map_reg == global_ev_reg)
+ nr_idxs = 1;
+ else if (event_regs[ctl.event_id].map_reg == part_ev_reg)
+ nr_idxs = stdev->partition_count;
+ else if (event_regs[ctl.event_id].map_reg == pff_ev_reg)
+ nr_idxs = stdev->pff_csr_count;
+ else
+ return -EINVAL;
+
+ for (ctl.index = 0; ctl.index < nr_idxs; ctl.index++) {
+ ret = event_ctl(stdev, &ctl);
+ if (ret < 0)
+ return ret;
+ }
+ } else {
+ ret = event_ctl(stdev, &ctl);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (copy_to_user(uctl, &ctl, sizeof(ctl)))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int ioctl_pff_to_port(struct switchtec_dev *stdev,
+ struct switchtec_ioctl_pff_port *up)
+{
+ int i, part;
+ u32 reg;
+ struct part_cfg_regs *pcfg;
+ struct switchtec_ioctl_pff_port p;
+
+ if (copy_from_user(&p, up, sizeof(p)))
+ return -EFAULT;
+
+ p.port = -1;
+ for (part = 0; part < stdev->partition_count; part++) {
+ pcfg = &stdev->mmio_part_cfg_all[part];
+ p.partition = part;
+
+ reg = ioread32(&pcfg->usp_pff_inst_id);
+ if (reg == p.pff) {
+ p.port = 0;
+ break;
+ }
+
+ reg = ioread32(&pcfg->vep_pff_inst_id);
+ if (reg == p.pff) {
+ p.port = SWITCHTEC_IOCTL_PFF_VEP;
+ break;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(pcfg->dsp_pff_inst_id); i++) {
+ reg = ioread32(&pcfg->dsp_pff_inst_id[i]);
+ if (reg != p.pff)
+ continue;
+
+ p.port = i + 1;
+ break;
+ }
+
+ if (p.port != -1)
+ break;
+ }
+
+ if (copy_to_user(up, &p, sizeof(p)))
+ return -EFAULT;
+
+ return 0;
+}
+
+static int ioctl_port_to_pff(struct switchtec_dev *stdev,
+ struct switchtec_ioctl_pff_port *up)
+{
+ struct switchtec_ioctl_pff_port p;
+ struct part_cfg_regs *pcfg;
+
+ if (copy_from_user(&p, up, sizeof(p)))
+ return -EFAULT;
+
+ if (p.partition == SWITCHTEC_IOCTL_EVENT_LOCAL_PART_IDX)
+ pcfg = stdev->mmio_part_cfg;
+ else if (p.partition < stdev->partition_count)
+ pcfg = &stdev->mmio_part_cfg_all[p.partition];
+ else
+ return -EINVAL;
+
+ switch (p.port) {
+ case 0:
+ p.pff = ioread32(&pcfg->usp_pff_inst_id);
+ break;
+ case SWITCHTEC_IOCTL_PFF_VEP:
+ p.pff = ioread32(&pcfg->vep_pff_inst_id);
+ break;
+ default:
+ if (p.port > ARRAY_SIZE(pcfg->dsp_pff_inst_id))
+ return -EINVAL;
+ p.pff = ioread32(&pcfg->dsp_pff_inst_id[p.port - 1]);
+ break;
+ }
+
+ if (copy_to_user(up, &p, sizeof(p)))
+ return -EFAULT;
+
+ return 0;
+}
+
+static long switchtec_dev_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long arg)
+{
+ struct switchtec_user *stuser = filp->private_data;
+ struct switchtec_dev *stdev = stuser->stdev;
+
+ void __user *argp = (void __user *)arg;
+
+ switch (cmd) {
+ case SWITCHTEC_IOCTL_FLASH_INFO:
+ return ioctl_flash_info(stdev, argp);
+ case SWITCHTEC_IOCTL_FLASH_PART_INFO:
+ return ioctl_flash_part_info(stdev, argp);
+ case SWITCHTEC_IOCTL_EVENT_SUMMARY:
+ return ioctl_event_summary(stdev, stuser, argp);
+ case SWITCHTEC_IOCTL_EVENT_CTL:
+ return ioctl_event_ctl(stdev, argp);
+ case SWITCHTEC_IOCTL_PFF_TO_PORT:
+ return ioctl_pff_to_port(stdev, argp);
+ case SWITCHTEC_IOCTL_PORT_TO_PFF:
+ return ioctl_port_to_pff(stdev, argp);
+ default:
+ return -ENOTTY;
+ }
+}
+
static const struct file_operations switchtec_fops = {
.owner = THIS_MODULE,
.open = switchtec_dev_open,
@@ -724,6 +1137,8 @@ static const struct file_operations switchtec_fops = {
.write = switchtec_dev_write,
.read = switchtec_dev_read,
.poll = switchtec_dev_poll,
+ .unlocked_ioctl = switchtec_dev_ioctl,
+ .compat_ioctl = switchtec_dev_ioctl,
};

static void stdev_release(struct device *dev)
@@ -808,11 +1223,52 @@ static struct switchtec_dev *stdev_create(struct pci_dev *pdev)
return ERR_PTR(rc);
}

+static int mask_event(struct switchtec_dev *stdev, int eid, int idx)
+{
+ size_t off = event_regs[eid].offset;
+ u32 __iomem *hdr_reg;
+ u32 hdr;
+
+ hdr_reg = event_regs[eid].map_reg(stdev, off, idx);
+ hdr = ioread32(hdr_reg);
+
+ if (!(hdr & SWITCHTEC_EVENT_OCCURRED && hdr & SWITCHTEC_EVENT_EN_IRQ))
+ return 0;
+
+ dev_dbg(&stdev->dev, "%s: %d %d %x\n", __func__, eid, idx, hdr);
+ hdr &= ~(SWITCHTEC_EVENT_EN_IRQ | SWITCHTEC_EVENT_OCCURRED);
+ iowrite32(hdr, hdr_reg);
+
+ return 1;
+}
+
+static int mask_all_events(struct switchtec_dev *stdev, int eid)
+{
+ int idx;
+ int count = 0;
+
+ if (event_regs[eid].map_reg == part_ev_reg) {
+ for (idx = 0; idx < stdev->partition_count; idx++)
+ count += mask_event(stdev, eid, idx);
+ } else if (event_regs[eid].map_reg == pff_ev_reg) {
+ for (idx = 0; idx < stdev->pff_csr_count; idx++) {
+ if (!stdev->pff_local[idx])
+ continue;
+ count += mask_event(stdev, eid, idx);
+ }
+ } else {
+ count += mask_event(stdev, eid, 0);
+ }
+
+ return count;
+}
+
static irqreturn_t switchtec_event_isr(int irq, void *dev)
{
struct switchtec_dev *stdev = dev;
u32 reg;
irqreturn_t ret = IRQ_NONE;
+ int eid, event_count = 0;

reg = ioread32(&stdev->mmio_part_cfg->mrpc_comp_hdr);
if (reg & SWITCHTEC_EVENT_OCCURRED) {
@@ -822,6 +1278,17 @@ static irqreturn_t switchtec_event_isr(int irq, void *dev)
iowrite32(reg, &stdev->mmio_part_cfg->mrpc_comp_hdr);
}

+ for (eid = 0; eid < SWITCHTEC_IOCTL_MAX_EVENTS; eid++)
+ event_count += mask_all_events(stdev, eid);
+
+ if (event_count) {
+ atomic_inc(&stdev->event_cnt);
+ wake_up_interruptible(&stdev->event_wq);
+ dev_dbg(&stdev->dev, "%s: %d events\n", __func__,
+ event_count);
+ return IRQ_HANDLED;
+ }
+
return ret;
}

diff --git a/include/uapi/linux/switchtec_ioctl.h b/include/uapi/linux/switchtec_ioctl.h
new file mode 100644
index 0000000..3e824e1
--- /dev/null
+++ b/include/uapi/linux/switchtec_ioctl.h
@@ -0,0 +1,132 @@
+/*
+ * Microsemi Switchtec PCIe Driver
+ * Copyright (c) 2017, Microsemi Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#ifndef _UAPI_LINUX_SWITCHTEC_IOCTL_H
+#define _UAPI_LINUX_SWITCHTEC_IOCTL_H
+
+#include <linux/types.h>
+
+#define SWITCHTEC_IOCTL_PART_CFG0 0
+#define SWITCHTEC_IOCTL_PART_CFG1 1
+#define SWITCHTEC_IOCTL_PART_IMG0 2
+#define SWITCHTEC_IOCTL_PART_IMG1 3
+#define SWITCHTEC_IOCTL_PART_NVLOG 4
+#define SWITCHTEC_IOCTL_PART_VENDOR0 5
+#define SWITCHTEC_IOCTL_PART_VENDOR1 6
+#define SWITCHTEC_IOCTL_PART_VENDOR2 7
+#define SWITCHTEC_IOCTL_PART_VENDOR3 8
+#define SWITCHTEC_IOCTL_PART_VENDOR4 9
+#define SWITCHTEC_IOCTL_PART_VENDOR5 10
+#define SWITCHTEC_IOCTL_PART_VENDOR6 11
+#define SWITCHTEC_IOCTL_PART_VENDOR7 12
+#define SWITCHTEC_IOCTL_NUM_PARTITIONS 13
+
+struct switchtec_ioctl_flash_info {
+ __u64 flash_length;
+ __u32 num_partitions;
+ __u32 padding;
+};
+
+struct switchtec_ioctl_flash_part_info {
+ __u32 flash_partition;
+ __u32 address;
+ __u32 length;
+ __u32 active;
+};
+
+struct switchtec_ioctl_event_summary {
+ __u64 global;
+ __u64 part_bitmap;
+ __u32 local_part;
+ __u32 padding;
+ __u32 part[48];
+ __u32 pff[48];
+};
+
+#define SWITCHTEC_IOCTL_EVENT_STACK_ERROR 0
+#define SWITCHTEC_IOCTL_EVENT_PPU_ERROR 1
+#define SWITCHTEC_IOCTL_EVENT_ISP_ERROR 2
+#define SWITCHTEC_IOCTL_EVENT_SYS_RESET 3
+#define SWITCHTEC_IOCTL_EVENT_FW_EXC 4
+#define SWITCHTEC_IOCTL_EVENT_FW_NMI 5
+#define SWITCHTEC_IOCTL_EVENT_FW_NON_FATAL 6
+#define SWITCHTEC_IOCTL_EVENT_FW_FATAL 7
+#define SWITCHTEC_IOCTL_EVENT_TWI_MRPC_COMP 8
+#define SWITCHTEC_IOCTL_EVENT_TWI_MRPC_COMP_ASYNC 9
+#define SWITCHTEC_IOCTL_EVENT_CLI_MRPC_COMP 10
+#define SWITCHTEC_IOCTL_EVENT_CLI_MRPC_COMP_ASYNC 11
+#define SWITCHTEC_IOCTL_EVENT_GPIO_INT 12
+#define SWITCHTEC_IOCTL_EVENT_PART_RESET 13
+#define SWITCHTEC_IOCTL_EVENT_MRPC_COMP 14
+#define SWITCHTEC_IOCTL_EVENT_MRPC_COMP_ASYNC 15
+#define SWITCHTEC_IOCTL_EVENT_DYN_PART_BIND_COMP 16
+#define SWITCHTEC_IOCTL_EVENT_AER_IN_P2P 17
+#define SWITCHTEC_IOCTL_EVENT_AER_IN_VEP 18
+#define SWITCHTEC_IOCTL_EVENT_DPC 19
+#define SWITCHTEC_IOCTL_EVENT_CTS 20
+#define SWITCHTEC_IOCTL_EVENT_HOTPLUG 21
+#define SWITCHTEC_IOCTL_EVENT_IER 22
+#define SWITCHTEC_IOCTL_EVENT_THRESH 23
+#define SWITCHTEC_IOCTL_EVENT_POWER_MGMT 24
+#define SWITCHTEC_IOCTL_EVENT_TLP_THROTTLING 25
+#define SWITCHTEC_IOCTL_EVENT_FORCE_SPEED 26
+#define SWITCHTEC_IOCTL_EVENT_CREDIT_TIMEOUT 27
+#define SWITCHTEC_IOCTL_EVENT_LINK_STATE 28
+#define SWITCHTEC_IOCTL_MAX_EVENTS 29
+
+#define SWITCHTEC_IOCTL_EVENT_LOCAL_PART_IDX -1
+#define SWITCHTEC_IOCTL_EVENT_IDX_ALL -2
+
+#define SWITCHTEC_IOCTL_EVENT_FLAG_CLEAR (1 << 0)
+#define SWITCHTEC_IOCTL_EVENT_FLAG_EN_POLL (1 << 1)
+#define SWITCHTEC_IOCTL_EVENT_FLAG_EN_LOG (1 << 2)
+#define SWITCHTEC_IOCTL_EVENT_FLAG_EN_CLI (1 << 3)
+#define SWITCHTEC_IOCTL_EVENT_FLAG_EN_FATAL (1 << 4)
+#define SWITCHTEC_IOCTL_EVENT_FLAG_DIS_POLL (1 << 5)
+#define SWITCHTEC_IOCTL_EVENT_FLAG_DIS_LOG (1 << 6)
+#define SWITCHTEC_IOCTL_EVENT_FLAG_DIS_CLI (1 << 7)
+#define SWITCHTEC_IOCTL_EVENT_FLAG_DIS_FATAL (1 << 8)
+#define SWITCHTEC_IOCTL_EVENT_FLAG_UNUSED (~0x1ff)
+
+struct switchtec_ioctl_event_ctl {
+ __u32 event_id;
+ __s32 index;
+ __u32 flags;
+ __u32 occurred;
+ __u32 count;
+ __u32 data[5];
+};
+
+#define SWITCHTEC_IOCTL_PFF_VEP 100
+struct switchtec_ioctl_pff_port {
+ __u32 pff;
+ __u32 partition;
+ __u32 port;
+};
+
+#define SWITCHTEC_IOCTL_FLASH_INFO \
+ _IOR('W', 0x40, struct switchtec_ioctl_flash_info)
+#define SWITCHTEC_IOCTL_FLASH_PART_INFO \
+ _IOWR('W', 0x41, struct switchtec_ioctl_flash_part_info)
+#define SWITCHTEC_IOCTL_EVENT_SUMMARY \
+ _IOR('W', 0x42, struct switchtec_ioctl_event_summary)
+#define SWITCHTEC_IOCTL_EVENT_CTL \
+ _IOWR('W', 0x43, struct switchtec_ioctl_event_ctl)
+#define SWITCHTEC_IOCTL_PFF_TO_PORT \
+ _IOWR('W', 0x44, struct switchtec_ioctl_pff_port)
+#define SWITCHTEC_IOCTL_PORT_TO_PFF \
+ _IOWR('W', 0x45, struct switchtec_ioctl_pff_port)
+
+#endif
--
2.1.4