mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 21:57:43 +00:00
net: iosm: protocol operations
1) Update UL/DL transfer descriptors in message ring. 2) Define message set for pipe/sleep protocol. Signed-off-by: M Chetan Kumar <m.chetan.kumar@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
M Chetan Kumar
David S. Miller
parent
faed4c6f6f
commit
64516f633b
2 changed files with 996 additions and 0 deletions
552
drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c
Normal file
552
drivers/net/wwan/iosm/iosm_ipc_protocol_ops.c
Normal file
|
|
@ -0,0 +1,552 @@
|
|||
// SPDX-License-Identifier: GPL-2.0-only
|
||||
/*
|
||||
* Copyright (C) 2020-21 Intel Corporation.
|
||||
*/
|
||||
|
||||
#include "iosm_ipc_protocol.h"
|
||||
#include "iosm_ipc_protocol_ops.h"
|
||||
|
||||
/* Get the next free message element.*/
|
||||
static union ipc_mem_msg_entry *
|
||||
ipc_protocol_free_msg_get(struct iosm_protocol *ipc_protocol, int *index)
|
||||
{
|
||||
u32 head = le32_to_cpu(ipc_protocol->p_ap_shm->msg_head);
|
||||
u32 new_head = (head + 1) % IPC_MEM_MSG_ENTRIES;
|
||||
union ipc_mem_msg_entry *msg;
|
||||
|
||||
if (new_head == le32_to_cpu(ipc_protocol->p_ap_shm->msg_tail)) {
|
||||
dev_err(ipc_protocol->dev, "message ring is full");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* Get the pointer to the next free message element,
|
||||
* reset the fields and mark is as invalid.
|
||||
*/
|
||||
msg = &ipc_protocol->p_ap_shm->msg_ring[head];
|
||||
memset(msg, 0, sizeof(*msg));
|
||||
|
||||
/* return index in message ring */
|
||||
*index = head;
|
||||
|
||||
return msg;
|
||||
}
|
||||
|
||||
/* Updates the message ring Head pointer */
|
||||
void ipc_protocol_msg_hp_update(struct iosm_imem *ipc_imem)
|
||||
{
|
||||
struct iosm_protocol *ipc_protocol = ipc_imem->ipc_protocol;
|
||||
u32 head = le32_to_cpu(ipc_protocol->p_ap_shm->msg_head);
|
||||
u32 new_head = (head + 1) % IPC_MEM_MSG_ENTRIES;
|
||||
|
||||
/* Update head pointer and fire doorbell. */
|
||||
ipc_protocol->p_ap_shm->msg_head = cpu_to_le32(new_head);
|
||||
ipc_protocol->old_msg_tail =
|
||||
le32_to_cpu(ipc_protocol->p_ap_shm->msg_tail);
|
||||
|
||||
ipc_pm_signal_hpda_doorbell(&ipc_protocol->pm, IPC_HP_MR, false);
|
||||
}
|
||||
|
||||
/* Allocate and prepare a OPEN_PIPE message.
|
||||
* This also allocates the memory for the new TDR structure and
|
||||
* updates the pipe structure referenced in the preparation arguments.
|
||||
*/
|
||||
static int ipc_protocol_msg_prepipe_open(struct iosm_protocol *ipc_protocol,
|
||||
union ipc_msg_prep_args *args)
|
||||
{
|
||||
int index;
|
||||
union ipc_mem_msg_entry *msg =
|
||||
ipc_protocol_free_msg_get(ipc_protocol, &index);
|
||||
struct ipc_pipe *pipe = args->pipe_open.pipe;
|
||||
struct ipc_protocol_td *tdr;
|
||||
struct sk_buff **skbr;
|
||||
|
||||
if (!msg) {
|
||||
dev_err(ipc_protocol->dev, "failed to get free message");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
/* Allocate the skbuf elements for the skbuf which are on the way.
|
||||
* SKB ring is internal memory allocation for driver. No need to
|
||||
* re-calculate the start and end addresses.
|
||||
*/
|
||||
skbr = kcalloc(pipe->nr_of_entries, sizeof(*skbr), GFP_ATOMIC);
|
||||
if (!skbr)
|
||||
return -ENOMEM;
|
||||
|
||||
/* Allocate the transfer descriptors for the pipe. */
|
||||
tdr = pci_alloc_consistent(ipc_protocol->pcie->pci,
|
||||
pipe->nr_of_entries * sizeof(*tdr),
|
||||
&pipe->phy_tdr_start);
|
||||
if (!tdr) {
|
||||
kfree(skbr);
|
||||
dev_err(ipc_protocol->dev, "tdr alloc error");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
pipe->max_nr_of_queued_entries = pipe->nr_of_entries - 1;
|
||||
pipe->nr_of_queued_entries = 0;
|
||||
pipe->tdr_start = tdr;
|
||||
pipe->skbr_start = skbr;
|
||||
pipe->old_tail = 0;
|
||||
|
||||
ipc_protocol->p_ap_shm->head_array[pipe->pipe_nr] = 0;
|
||||
|
||||
msg->open_pipe.type_of_message = IPC_MEM_MSG_OPEN_PIPE;
|
||||
msg->open_pipe.pipe_nr = pipe->pipe_nr;
|
||||
msg->open_pipe.tdr_addr = cpu_to_le64(pipe->phy_tdr_start);
|
||||
msg->open_pipe.tdr_entries = cpu_to_le16(pipe->nr_of_entries);
|
||||
msg->open_pipe.accumulation_backoff =
|
||||
cpu_to_le32(pipe->accumulation_backoff);
|
||||
msg->open_pipe.irq_vector = cpu_to_le32(pipe->irq);
|
||||
|
||||
return index;
|
||||
}
|
||||
|
||||
static int ipc_protocol_msg_prepipe_close(struct iosm_protocol *ipc_protocol,
|
||||
union ipc_msg_prep_args *args)
|
||||
{
|
||||
int index = -1;
|
||||
union ipc_mem_msg_entry *msg =
|
||||
ipc_protocol_free_msg_get(ipc_protocol, &index);
|
||||
struct ipc_pipe *pipe = args->pipe_close.pipe;
|
||||
|
||||
if (!msg)
|
||||
return -EIO;
|
||||
|
||||
msg->close_pipe.type_of_message = IPC_MEM_MSG_CLOSE_PIPE;
|
||||
msg->close_pipe.pipe_nr = pipe->pipe_nr;
|
||||
|
||||
dev_dbg(ipc_protocol->dev, "IPC_MEM_MSG_CLOSE_PIPE(pipe_nr=%d)",
|
||||
msg->close_pipe.pipe_nr);
|
||||
|
||||
return index;
|
||||
}
|
||||
|
||||
static int ipc_protocol_msg_prep_sleep(struct iosm_protocol *ipc_protocol,
|
||||
union ipc_msg_prep_args *args)
|
||||
{
|
||||
int index = -1;
|
||||
union ipc_mem_msg_entry *msg =
|
||||
ipc_protocol_free_msg_get(ipc_protocol, &index);
|
||||
|
||||
if (!msg) {
|
||||
dev_err(ipc_protocol->dev, "failed to get free message");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
/* Prepare and send the host sleep message to CP to enter or exit D3. */
|
||||
msg->host_sleep.type_of_message = IPC_MEM_MSG_SLEEP;
|
||||
msg->host_sleep.target = args->sleep.target; /* 0=host, 1=device */
|
||||
|
||||
/* state; 0=enter, 1=exit 2=enter w/o protocol */
|
||||
msg->host_sleep.state = args->sleep.state;
|
||||
|
||||
dev_dbg(ipc_protocol->dev, "IPC_MEM_MSG_SLEEP(target=%d; state=%d)",
|
||||
msg->host_sleep.target, msg->host_sleep.state);
|
||||
|
||||
return index;
|
||||
}
|
||||
|
||||
static int ipc_protocol_msg_prep_feature_set(struct iosm_protocol *ipc_protocol,
|
||||
union ipc_msg_prep_args *args)
|
||||
{
|
||||
int index = -1;
|
||||
union ipc_mem_msg_entry *msg =
|
||||
ipc_protocol_free_msg_get(ipc_protocol, &index);
|
||||
|
||||
if (!msg) {
|
||||
dev_err(ipc_protocol->dev, "failed to get free message");
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
msg->feature_set.type_of_message = IPC_MEM_MSG_FEATURE_SET;
|
||||
msg->feature_set.reset_enable = args->feature_set.reset_enable <<
|
||||
RESET_BIT;
|
||||
|
||||
dev_dbg(ipc_protocol->dev, "IPC_MEM_MSG_FEATURE_SET(reset_enable=%d)",
|
||||
msg->feature_set.reset_enable >> RESET_BIT);
|
||||
|
||||
return index;
|
||||
}
|
||||
|
||||
/* Processes the message consumed by CP. */
|
||||
bool ipc_protocol_msg_process(struct iosm_imem *ipc_imem, int irq)
|
||||
{
|
||||
struct iosm_protocol *ipc_protocol = ipc_imem->ipc_protocol;
|
||||
struct ipc_rsp **rsp_ring = ipc_protocol->rsp_ring;
|
||||
bool msg_processed = false;
|
||||
u32 i;
|
||||
|
||||
if (le32_to_cpu(ipc_protocol->p_ap_shm->msg_tail) >=
|
||||
IPC_MEM_MSG_ENTRIES) {
|
||||
dev_err(ipc_protocol->dev, "msg_tail out of range: %d",
|
||||
le32_to_cpu(ipc_protocol->p_ap_shm->msg_tail));
|
||||
return msg_processed;
|
||||
}
|
||||
|
||||
if (irq != IMEM_IRQ_DONT_CARE &&
|
||||
irq != ipc_protocol->p_ap_shm->ci.msg_irq_vector)
|
||||
return msg_processed;
|
||||
|
||||
for (i = ipc_protocol->old_msg_tail;
|
||||
i != le32_to_cpu(ipc_protocol->p_ap_shm->msg_tail);
|
||||
i = (i + 1) % IPC_MEM_MSG_ENTRIES) {
|
||||
union ipc_mem_msg_entry *msg =
|
||||
&ipc_protocol->p_ap_shm->msg_ring[i];
|
||||
|
||||
dev_dbg(ipc_protocol->dev, "msg[%d]: type=%u status=%d", i,
|
||||
msg->common.type_of_message,
|
||||
msg->common.completion_status);
|
||||
|
||||
/* Update response with status and wake up waiting requestor */
|
||||
if (rsp_ring[i]) {
|
||||
rsp_ring[i]->status =
|
||||
le32_to_cpu(msg->common.completion_status);
|
||||
complete(&rsp_ring[i]->completion);
|
||||
rsp_ring[i] = NULL;
|
||||
}
|
||||
msg_processed = true;
|
||||
}
|
||||
|
||||
ipc_protocol->old_msg_tail = i;
|
||||
return msg_processed;
|
||||
}
|
||||
|
||||
/* Sends data from UL list to CP for the provided pipe by updating the Head
|
||||
* pointer of given pipe.
|
||||
*/
|
||||
bool ipc_protocol_ul_td_send(struct iosm_protocol *ipc_protocol,
|
||||
struct ipc_pipe *pipe,
|
||||
struct sk_buff_head *p_ul_list)
|
||||
{
|
||||
struct ipc_protocol_td *td;
|
||||
bool hpda_pending = false;
|
||||
struct sk_buff *skb;
|
||||
s32 free_elements;
|
||||
u32 head;
|
||||
u32 tail;
|
||||
|
||||
if (!ipc_protocol->p_ap_shm) {
|
||||
dev_err(ipc_protocol->dev, "driver is not initialized");
|
||||
return false;
|
||||
}
|
||||
|
||||
/* Get head and tail of the td list and calculate
|
||||
* the number of free elements.
|
||||
*/
|
||||
head = le32_to_cpu(ipc_protocol->p_ap_shm->head_array[pipe->pipe_nr]);
|
||||
tail = pipe->old_tail;
|
||||
|
||||
while (!skb_queue_empty(p_ul_list)) {
|
||||
if (head < tail)
|
||||
free_elements = tail - head - 1;
|
||||
else
|
||||
free_elements =
|
||||
pipe->nr_of_entries - head + ((s32)tail - 1);
|
||||
|
||||
if (free_elements <= 0) {
|
||||
dev_dbg(ipc_protocol->dev,
|
||||
"no free td elements for UL pipe %d",
|
||||
pipe->pipe_nr);
|
||||
break;
|
||||
}
|
||||
|
||||
/* Get the td address. */
|
||||
td = &pipe->tdr_start[head];
|
||||
|
||||
/* Take the first element of the uplink list and add it
|
||||
* to the td list.
|
||||
*/
|
||||
skb = skb_dequeue(p_ul_list);
|
||||
if (WARN_ON(!skb))
|
||||
break;
|
||||
|
||||
/* Save the reference to the uplink skbuf. */
|
||||
pipe->skbr_start[head] = skb;
|
||||
|
||||
td->buffer.address = IPC_CB(skb)->mapping;
|
||||
td->scs = cpu_to_le32(skb->len) & cpu_to_le32(SIZE_MASK);
|
||||
td->next = 0;
|
||||
|
||||
pipe->nr_of_queued_entries++;
|
||||
|
||||
/* Calculate the new head and save it. */
|
||||
head++;
|
||||
if (head >= pipe->nr_of_entries)
|
||||
head = 0;
|
||||
|
||||
ipc_protocol->p_ap_shm->head_array[pipe->pipe_nr] =
|
||||
cpu_to_le32(head);
|
||||
}
|
||||
|
||||
if (pipe->old_head != head) {
|
||||
dev_dbg(ipc_protocol->dev, "New UL TDs Pipe:%d", pipe->pipe_nr);
|
||||
|
||||
pipe->old_head = head;
|
||||
/* Trigger doorbell because of pending UL packets. */
|
||||
hpda_pending = true;
|
||||
}
|
||||
|
||||
return hpda_pending;
|
||||
}
|
||||
|
||||
/* Checks for Tail pointer update from CP and returns the data as SKB. */
|
||||
struct sk_buff *ipc_protocol_ul_td_process(struct iosm_protocol *ipc_protocol,
|
||||
struct ipc_pipe *pipe)
|
||||
{
|
||||
struct ipc_protocol_td *p_td = &pipe->tdr_start[pipe->old_tail];
|
||||
struct sk_buff *skb = pipe->skbr_start[pipe->old_tail];
|
||||
|
||||
pipe->nr_of_queued_entries--;
|
||||
pipe->old_tail++;
|
||||
if (pipe->old_tail >= pipe->nr_of_entries)
|
||||
pipe->old_tail = 0;
|
||||
|
||||
if (!p_td->buffer.address) {
|
||||
dev_err(ipc_protocol->dev, "Td buffer address is NULL");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if (p_td->buffer.address != IPC_CB(skb)->mapping) {
|
||||
dev_err(ipc_protocol->dev,
|
||||
"pipe %d: invalid buf_addr or skb_data",
|
||||
pipe->pipe_nr);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return skb;
|
||||
}
|
||||
|
||||
/* Allocates an SKB for CP to send data and updates the Head Pointer
|
||||
* of the given Pipe#.
|
||||
*/
|
||||
bool ipc_protocol_dl_td_prepare(struct iosm_protocol *ipc_protocol,
|
||||
struct ipc_pipe *pipe)
|
||||
{
|
||||
struct ipc_protocol_td *td;
|
||||
dma_addr_t mapping = 0;
|
||||
u32 head, new_head;
|
||||
struct sk_buff *skb;
|
||||
u32 tail;
|
||||
|
||||
/* Get head and tail of the td list and calculate
|
||||
* the number of free elements.
|
||||
*/
|
||||
head = le32_to_cpu(ipc_protocol->p_ap_shm->head_array[pipe->pipe_nr]);
|
||||
tail = le32_to_cpu(ipc_protocol->p_ap_shm->tail_array[pipe->pipe_nr]);
|
||||
|
||||
new_head = head + 1;
|
||||
if (new_head >= pipe->nr_of_entries)
|
||||
new_head = 0;
|
||||
|
||||
if (new_head == tail)
|
||||
return false;
|
||||
|
||||
/* Get the td address. */
|
||||
td = &pipe->tdr_start[head];
|
||||
|
||||
/* Allocate the skbuf for the descriptor. */
|
||||
skb = ipc_pcie_alloc_skb(ipc_protocol->pcie, pipe->buf_size, GFP_ATOMIC,
|
||||
&mapping, DMA_FROM_DEVICE,
|
||||
IPC_MEM_DL_ETH_OFFSET);
|
||||
if (!skb)
|
||||
return false;
|
||||
|
||||
td->buffer.address = mapping;
|
||||
td->scs = cpu_to_le32(pipe->buf_size) & cpu_to_le32(SIZE_MASK);
|
||||
td->next = 0;
|
||||
|
||||
/* store the new head value. */
|
||||
ipc_protocol->p_ap_shm->head_array[pipe->pipe_nr] =
|
||||
cpu_to_le32(new_head);
|
||||
|
||||
/* Save the reference to the skbuf. */
|
||||
pipe->skbr_start[head] = skb;
|
||||
|
||||
pipe->nr_of_queued_entries++;
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
/* Processes DL TD's */
|
||||
struct sk_buff *ipc_protocol_dl_td_process(struct iosm_protocol *ipc_protocol,
|
||||
struct ipc_pipe *pipe)
|
||||
{
|
||||
u32 tail =
|
||||
le32_to_cpu(ipc_protocol->p_ap_shm->tail_array[pipe->pipe_nr]);
|
||||
struct ipc_protocol_td *p_td;
|
||||
struct sk_buff *skb;
|
||||
|
||||
if (!pipe->tdr_start)
|
||||
return NULL;
|
||||
|
||||
/* Copy the reference to the downlink buffer. */
|
||||
p_td = &pipe->tdr_start[pipe->old_tail];
|
||||
skb = pipe->skbr_start[pipe->old_tail];
|
||||
|
||||
/* Reset the ring elements. */
|
||||
pipe->skbr_start[pipe->old_tail] = NULL;
|
||||
|
||||
pipe->nr_of_queued_entries--;
|
||||
|
||||
pipe->old_tail++;
|
||||
if (pipe->old_tail >= pipe->nr_of_entries)
|
||||
pipe->old_tail = 0;
|
||||
|
||||
if (!skb) {
|
||||
dev_err(ipc_protocol->dev, "skb is null");
|
||||
goto ret;
|
||||
} else if (!p_td->buffer.address) {
|
||||
dev_err(ipc_protocol->dev, "td/buffer address is null");
|
||||
ipc_pcie_kfree_skb(ipc_protocol->pcie, skb);
|
||||
skb = NULL;
|
||||
goto ret;
|
||||
}
|
||||
|
||||
if (!IPC_CB(skb)) {
|
||||
dev_err(ipc_protocol->dev, "pipe# %d, tail: %d skb_cb is NULL",
|
||||
pipe->pipe_nr, tail);
|
||||
ipc_pcie_kfree_skb(ipc_protocol->pcie, skb);
|
||||
skb = NULL;
|
||||
goto ret;
|
||||
}
|
||||
|
||||
if (p_td->buffer.address != IPC_CB(skb)->mapping) {
|
||||
dev_err(ipc_protocol->dev, "invalid buf=%p or skb=%p",
|
||||
(void *)p_td->buffer.address, skb->data);
|
||||
ipc_pcie_kfree_skb(ipc_protocol->pcie, skb);
|
||||
skb = NULL;
|
||||
goto ret;
|
||||
} else if ((le32_to_cpu(p_td->scs) & SIZE_MASK) > pipe->buf_size) {
|
||||
dev_err(ipc_protocol->dev, "invalid buffer size %d > %d",
|
||||
le32_to_cpu(p_td->scs) & SIZE_MASK,
|
||||
pipe->buf_size);
|
||||
ipc_pcie_kfree_skb(ipc_protocol->pcie, skb);
|
||||
skb = NULL;
|
||||
goto ret;
|
||||
} else if (le32_to_cpu(p_td->scs) >> COMPLETION_STATUS ==
|
||||
IPC_MEM_TD_CS_ABORT) {
|
||||
/* Discard aborted buffers. */
|
||||
dev_dbg(ipc_protocol->dev, "discard 'aborted' buffers");
|
||||
ipc_pcie_kfree_skb(ipc_protocol->pcie, skb);
|
||||
skb = NULL;
|
||||
goto ret;
|
||||
}
|
||||
|
||||
/* Set the length field in skbuf. */
|
||||
skb_put(skb, le32_to_cpu(p_td->scs) & SIZE_MASK);
|
||||
|
||||
ret:
|
||||
return skb;
|
||||
}
|
||||
|
||||
void ipc_protocol_get_head_tail_index(struct iosm_protocol *ipc_protocol,
|
||||
struct ipc_pipe *pipe, u32 *head,
|
||||
u32 *tail)
|
||||
{
|
||||
struct ipc_protocol_ap_shm *ipc_ap_shm = ipc_protocol->p_ap_shm;
|
||||
|
||||
if (head)
|
||||
*head = le32_to_cpu(ipc_ap_shm->head_array[pipe->pipe_nr]);
|
||||
|
||||
if (tail)
|
||||
*tail = le32_to_cpu(ipc_ap_shm->tail_array[pipe->pipe_nr]);
|
||||
}
|
||||
|
||||
/* Frees the TDs given to CP. */
|
||||
void ipc_protocol_pipe_cleanup(struct iosm_protocol *ipc_protocol,
|
||||
struct ipc_pipe *pipe)
|
||||
{
|
||||
struct sk_buff *skb;
|
||||
u32 head;
|
||||
u32 tail;
|
||||
|
||||
/* Get the start and the end of the buffer list. */
|
||||
head = le32_to_cpu(ipc_protocol->p_ap_shm->head_array[pipe->pipe_nr]);
|
||||
tail = pipe->old_tail;
|
||||
|
||||
/* Reset tail and head to 0. */
|
||||
ipc_protocol->p_ap_shm->tail_array[pipe->pipe_nr] = 0;
|
||||
ipc_protocol->p_ap_shm->head_array[pipe->pipe_nr] = 0;
|
||||
|
||||
/* Free pending uplink and downlink buffers. */
|
||||
if (pipe->skbr_start) {
|
||||
while (head != tail) {
|
||||
/* Get the reference to the skbuf,
|
||||
* which is on the way and free it.
|
||||
*/
|
||||
skb = pipe->skbr_start[tail];
|
||||
if (skb)
|
||||
ipc_pcie_kfree_skb(ipc_protocol->pcie, skb);
|
||||
|
||||
tail++;
|
||||
if (tail >= pipe->nr_of_entries)
|
||||
tail = 0;
|
||||
}
|
||||
|
||||
kfree(pipe->skbr_start);
|
||||
pipe->skbr_start = NULL;
|
||||
}
|
||||
|
||||
pipe->old_tail = 0;
|
||||
|
||||
/* Free and reset the td and skbuf circular buffers. kfree is save! */
|
||||
if (pipe->tdr_start) {
|
||||
pci_free_consistent(ipc_protocol->pcie->pci,
|
||||
sizeof(*pipe->tdr_start) *
|
||||
pipe->nr_of_entries,
|
||||
pipe->tdr_start, pipe->phy_tdr_start);
|
||||
|
||||
pipe->tdr_start = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
enum ipc_mem_device_ipc_state ipc_protocol_get_ipc_status(struct iosm_protocol
|
||||
*ipc_protocol)
|
||||
{
|
||||
return (enum ipc_mem_device_ipc_state)
|
||||
le32_to_cpu(ipc_protocol->p_ap_shm->device_info.ipc_status);
|
||||
}
|
||||
|
||||
enum ipc_mem_exec_stage
|
||||
ipc_protocol_get_ap_exec_stage(struct iosm_protocol *ipc_protocol)
|
||||
{
|
||||
return le32_to_cpu(ipc_protocol->p_ap_shm->device_info.execution_stage);
|
||||
}
|
||||
|
||||
int ipc_protocol_msg_prep(struct iosm_imem *ipc_imem,
|
||||
enum ipc_msg_prep_type msg_type,
|
||||
union ipc_msg_prep_args *args)
|
||||
{
|
||||
struct iosm_protocol *ipc_protocol = ipc_imem->ipc_protocol;
|
||||
|
||||
switch (msg_type) {
|
||||
case IPC_MSG_PREP_SLEEP:
|
||||
return ipc_protocol_msg_prep_sleep(ipc_protocol, args);
|
||||
|
||||
case IPC_MSG_PREP_PIPE_OPEN:
|
||||
return ipc_protocol_msg_prepipe_open(ipc_protocol, args);
|
||||
|
||||
case IPC_MSG_PREP_PIPE_CLOSE:
|
||||
return ipc_protocol_msg_prepipe_close(ipc_protocol, args);
|
||||
|
||||
case IPC_MSG_PREP_FEATURE_SET:
|
||||
return ipc_protocol_msg_prep_feature_set(ipc_protocol, args);
|
||||
|
||||
/* Unsupported messages in protocol */
|
||||
case IPC_MSG_PREP_MAP:
|
||||
case IPC_MSG_PREP_UNMAP:
|
||||
default:
|
||||
dev_err(ipc_protocol->dev,
|
||||
"unsupported message type: %d in protocol", msg_type);
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
u32
|
||||
ipc_protocol_pm_dev_get_sleep_notification(struct iosm_protocol *ipc_protocol)
|
||||
{
|
||||
struct ipc_protocol_ap_shm *ipc_ap_shm = ipc_protocol->p_ap_shm;
|
||||
|
||||
return le32_to_cpu(ipc_ap_shm->device_info.device_sleep_notification);
|
||||
}
|
||||
444
drivers/net/wwan/iosm/iosm_ipc_protocol_ops.h
Normal file
444
drivers/net/wwan/iosm/iosm_ipc_protocol_ops.h
Normal file
|
|
@ -0,0 +1,444 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0-only
|
||||
*
|
||||
* Copyright (C) 2020-21 Intel Corporation.
|
||||
*/
|
||||
|
||||
#ifndef IOSM_IPC_PROTOCOL_OPS_H
|
||||
#define IOSM_IPC_PROTOCOL_OPS_H
|
||||
|
||||
#define SIZE_MASK 0x00FFFFFF
|
||||
#define COMPLETION_STATUS 24
|
||||
#define RESET_BIT 7
|
||||
|
||||
/**
|
||||
* enum ipc_mem_td_cs - Completion status of a TD
|
||||
* @IPC_MEM_TD_CS_INVALID: Initial status - td not yet used.
|
||||
* @IPC_MEM_TD_CS_PARTIAL_TRANSFER: More data pending -> next TD used for this
|
||||
* @IPC_MEM_TD_CS_END_TRANSFER: IO transfer is complete.
|
||||
* @IPC_MEM_TD_CS_OVERFLOW: IO transfer to small for the buff to write
|
||||
* @IPC_MEM_TD_CS_ABORT: TD marked as abort and shall be discarded
|
||||
* by AP.
|
||||
* @IPC_MEM_TD_CS_ERROR: General error.
|
||||
*/
|
||||
enum ipc_mem_td_cs {
|
||||
IPC_MEM_TD_CS_INVALID,
|
||||
IPC_MEM_TD_CS_PARTIAL_TRANSFER,
|
||||
IPC_MEM_TD_CS_END_TRANSFER,
|
||||
IPC_MEM_TD_CS_OVERFLOW,
|
||||
IPC_MEM_TD_CS_ABORT,
|
||||
IPC_MEM_TD_CS_ERROR,
|
||||
};
|
||||
|
||||
/**
|
||||
* enum ipc_mem_msg_cs - Completion status of IPC Message
|
||||
* @IPC_MEM_MSG_CS_INVALID: Initial status.
|
||||
* @IPC_MEM_MSG_CS_SUCCESS: IPC Message completion success.
|
||||
* @IPC_MEM_MSG_CS_ERROR: Message send error.
|
||||
*/
|
||||
enum ipc_mem_msg_cs {
|
||||
IPC_MEM_MSG_CS_INVALID,
|
||||
IPC_MEM_MSG_CS_SUCCESS,
|
||||
IPC_MEM_MSG_CS_ERROR,
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ipc_msg_prep_args_pipe - struct for pipe args for message preparation
|
||||
* @pipe: Pipe to open/close
|
||||
*/
|
||||
struct ipc_msg_prep_args_pipe {
|
||||
struct ipc_pipe *pipe;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ipc_msg_prep_args_sleep - struct for sleep args for message
|
||||
* preparation
|
||||
* @target: 0=host, 1=device
|
||||
* @state: 0=enter sleep, 1=exit sleep
|
||||
*/
|
||||
struct ipc_msg_prep_args_sleep {
|
||||
unsigned int target;
|
||||
unsigned int state;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ipc_msg_prep_feature_set - struct for feature set argument for
|
||||
* message preparation
|
||||
* @reset_enable: 0=out-of-band, 1=in-band-crash notification
|
||||
*/
|
||||
struct ipc_msg_prep_feature_set {
|
||||
u8 reset_enable;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ipc_msg_prep_map - struct for map argument for message preparation
|
||||
* @region_id: Region to map
|
||||
* @addr: Pcie addr of region to map
|
||||
* @size: Size of the region to map
|
||||
*/
|
||||
struct ipc_msg_prep_map {
|
||||
unsigned int region_id;
|
||||
unsigned long addr;
|
||||
size_t size;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ipc_msg_prep_unmap - struct for unmap argument for message preparation
|
||||
* @region_id: Region to unmap
|
||||
*/
|
||||
struct ipc_msg_prep_unmap {
|
||||
unsigned int region_id;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ipc_msg_prep_args - Union to handle different message types
|
||||
* @pipe_open: Pipe open message preparation struct
|
||||
* @pipe_close: Pipe close message preparation struct
|
||||
* @sleep: Sleep message preparation struct
|
||||
* @feature_set: Feature set message preparation struct
|
||||
* @map: Memory map message preparation struct
|
||||
* @unmap: Memory unmap message preparation struct
|
||||
*/
|
||||
union ipc_msg_prep_args {
|
||||
struct ipc_msg_prep_args_pipe pipe_open;
|
||||
struct ipc_msg_prep_args_pipe pipe_close;
|
||||
struct ipc_msg_prep_args_sleep sleep;
|
||||
struct ipc_msg_prep_feature_set feature_set;
|
||||
struct ipc_msg_prep_map map;
|
||||
struct ipc_msg_prep_unmap unmap;
|
||||
};
|
||||
|
||||
/**
|
||||
* enum ipc_msg_prep_type - Enum for message prepare actions
|
||||
* @IPC_MSG_PREP_SLEEP: Sleep message preparation type
|
||||
* @IPC_MSG_PREP_PIPE_OPEN: Pipe open message preparation type
|
||||
* @IPC_MSG_PREP_PIPE_CLOSE: Pipe close message preparation type
|
||||
* @IPC_MSG_PREP_FEATURE_SET: Feature set message preparation type
|
||||
* @IPC_MSG_PREP_MAP: Memory map message preparation type
|
||||
* @IPC_MSG_PREP_UNMAP: Memory unmap message preparation type
|
||||
*/
|
||||
enum ipc_msg_prep_type {
|
||||
IPC_MSG_PREP_SLEEP,
|
||||
IPC_MSG_PREP_PIPE_OPEN,
|
||||
IPC_MSG_PREP_PIPE_CLOSE,
|
||||
IPC_MSG_PREP_FEATURE_SET,
|
||||
IPC_MSG_PREP_MAP,
|
||||
IPC_MSG_PREP_UNMAP,
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ipc_rsp - Response to sent message
|
||||
* @completion: For waking up requestor
|
||||
* @status: Completion status
|
||||
*/
|
||||
struct ipc_rsp {
|
||||
struct completion completion;
|
||||
enum ipc_mem_msg_cs status;
|
||||
};
|
||||
|
||||
/**
|
||||
* enum ipc_mem_msg - Type-definition of the messages.
|
||||
* @IPC_MEM_MSG_OPEN_PIPE: AP ->CP: Open a pipe
|
||||
* @IPC_MEM_MSG_CLOSE_PIPE: AP ->CP: Close a pipe
|
||||
* @IPC_MEM_MSG_ABORT_PIPE: AP ->CP: wait for completion of the
|
||||
* running transfer and abort all pending
|
||||
* IO-transfers for the pipe
|
||||
* @IPC_MEM_MSG_SLEEP: AP ->CP: host enter or exit sleep
|
||||
* @IPC_MEM_MSG_FEATURE_SET: AP ->CP: Intel feature configuration
|
||||
*/
|
||||
enum ipc_mem_msg {
|
||||
IPC_MEM_MSG_OPEN_PIPE = 0x01,
|
||||
IPC_MEM_MSG_CLOSE_PIPE = 0x02,
|
||||
IPC_MEM_MSG_ABORT_PIPE = 0x03,
|
||||
IPC_MEM_MSG_SLEEP = 0x04,
|
||||
IPC_MEM_MSG_FEATURE_SET = 0xF0,
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ipc_mem_msg_open_pipe - Message structure for open pipe
|
||||
* @tdr_addr: Tdr address
|
||||
* @tdr_entries: Tdr entries
|
||||
* @pipe_nr: Pipe number
|
||||
* @type_of_message: Message type
|
||||
* @irq_vector: MSI vector number
|
||||
* @accumulation_backoff: Time in usec for data accumalation
|
||||
* @completion_status: Message Completion Status
|
||||
*/
|
||||
struct ipc_mem_msg_open_pipe {
|
||||
__le64 tdr_addr;
|
||||
__le16 tdr_entries;
|
||||
u8 pipe_nr;
|
||||
u8 type_of_message;
|
||||
__le32 irq_vector;
|
||||
__le32 accumulation_backoff;
|
||||
__le32 completion_status;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ipc_mem_msg_close_pipe - Message structure for close pipe
|
||||
* @reserved1: Reserved
|
||||
* @reserved2: Reserved
|
||||
* @pipe_nr: Pipe number
|
||||
* @type_of_message: Message type
|
||||
* @reserved3: Reserved
|
||||
* @reserved4: Reserved
|
||||
* @completion_status: Message Completion Status
|
||||
*/
|
||||
struct ipc_mem_msg_close_pipe {
|
||||
__le32 reserved1[2];
|
||||
__le16 reserved2;
|
||||
u8 pipe_nr;
|
||||
u8 type_of_message;
|
||||
__le32 reserved3;
|
||||
__le32 reserved4;
|
||||
__le32 completion_status;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ipc_mem_msg_abort_pipe - Message structure for abort pipe
|
||||
* @reserved1: Reserved
|
||||
* @reserved2: Reserved
|
||||
* @pipe_nr: Pipe number
|
||||
* @type_of_message: Message type
|
||||
* @reserved3: Reserved
|
||||
* @reserved4: Reserved
|
||||
* @completion_status: Message Completion Status
|
||||
*/
|
||||
struct ipc_mem_msg_abort_pipe {
|
||||
__le32 reserved1[2];
|
||||
__le16 reserved2;
|
||||
u8 pipe_nr;
|
||||
u8 type_of_message;
|
||||
__le32 reserved3;
|
||||
__le32 reserved4;
|
||||
__le32 completion_status;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ipc_mem_msg_host_sleep - Message structure for sleep message.
|
||||
* @reserved1: Reserved
|
||||
* @target: 0=host, 1=device, host or EP devie
|
||||
* is the message target
|
||||
* @state: 0=enter sleep, 1=exit sleep,
|
||||
* 2=enter sleep no protocol
|
||||
* @reserved2: Reserved
|
||||
* @type_of_message: Message type
|
||||
* @reserved3: Reserved
|
||||
* @reserved4: Reserved
|
||||
* @completion_status: Message Completion Status
|
||||
*/
|
||||
struct ipc_mem_msg_host_sleep {
|
||||
__le32 reserved1[2];
|
||||
u8 target;
|
||||
u8 state;
|
||||
u8 reserved2;
|
||||
u8 type_of_message;
|
||||
__le32 reserved3;
|
||||
__le32 reserved4;
|
||||
__le32 completion_status;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ipc_mem_msg_feature_set - Message structure for feature_set message
|
||||
* @reserved1: Reserved
|
||||
* @reserved2: Reserved
|
||||
* @reset_enable: 0=out-of-band, 1=in-band-crash notification
|
||||
* @type_of_message: Message type
|
||||
* @reserved3: Reserved
|
||||
* @reserved4: Reserved
|
||||
* @completion_status: Message Completion Status
|
||||
*/
|
||||
struct ipc_mem_msg_feature_set {
|
||||
__le32 reserved1[2];
|
||||
__le16 reserved2;
|
||||
u8 reset_enable;
|
||||
u8 type_of_message;
|
||||
__le32 reserved3;
|
||||
__le32 reserved4;
|
||||
__le32 completion_status;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct ipc_mem_msg_common - Message structure for completion status update.
|
||||
* @reserved1: Reserved
|
||||
* @reserved2: Reserved
|
||||
* @type_of_message: Message type
|
||||
* @reserved3: Reserved
|
||||
* @reserved4: Reserved
|
||||
* @completion_status: Message Completion Status
|
||||
*/
|
||||
struct ipc_mem_msg_common {
|
||||
__le32 reserved1[2];
|
||||
u8 reserved2[3];
|
||||
u8 type_of_message;
|
||||
__le32 reserved3;
|
||||
__le32 reserved4;
|
||||
__le32 completion_status;
|
||||
};
|
||||
|
||||
/**
|
||||
* union ipc_mem_msg_entry - Union with all possible messages.
|
||||
* @open_pipe: Open pipe message struct
|
||||
* @close_pipe: Close pipe message struct
|
||||
* @abort_pipe: Abort pipe message struct
|
||||
* @host_sleep: Host sleep message struct
|
||||
* @feature_set: Featuer set message struct
|
||||
* @common: Used to access msg_type and to set the completion status
|
||||
*/
|
||||
union ipc_mem_msg_entry {
|
||||
struct ipc_mem_msg_open_pipe open_pipe;
|
||||
struct ipc_mem_msg_close_pipe close_pipe;
|
||||
struct ipc_mem_msg_abort_pipe abort_pipe;
|
||||
struct ipc_mem_msg_host_sleep host_sleep;
|
||||
struct ipc_mem_msg_feature_set feature_set;
|
||||
struct ipc_mem_msg_common common;
|
||||
};
|
||||
|
||||
/* Transfer descriptor definition. */
|
||||
struct ipc_protocol_td {
|
||||
union {
|
||||
/* 0 : 63 - 64-bit address of a buffer in host memory. */
|
||||
dma_addr_t address;
|
||||
struct {
|
||||
/* 0 : 31 - 32 bit address */
|
||||
__le32 address;
|
||||
/* 32 : 63 - corresponding descriptor */
|
||||
__le32 desc;
|
||||
} __packed shm;
|
||||
} buffer;
|
||||
|
||||
/* 0 - 2nd byte - Size of the buffer.
|
||||
* The host provides the size of the buffer queued.
|
||||
* The EP device reads this value and shall update
|
||||
* it for downlink transfers to indicate the
|
||||
* amount of data written in buffer.
|
||||
* 3rd byte - This field provides the completion status
|
||||
* of the TD. When queuing the TD, the host sets
|
||||
* the status to 0. The EP device updates this
|
||||
* field when completing the TD.
|
||||
*/
|
||||
__le32 scs;
|
||||
|
||||
/* 0th - nr of following descriptors
|
||||
* 1 - 3rd byte - reserved
|
||||
*/
|
||||
__le32 next;
|
||||
} __packed;
|
||||
|
||||
/**
|
||||
* ipc_protocol_msg_prep - Prepare message based upon message type
|
||||
* @ipc_imem: iosm_protocol instance
|
||||
* @msg_type: message prepare type
|
||||
* @args: message arguments
|
||||
*
|
||||
* Return: 0 on success and failure value on error
|
||||
*/
|
||||
int ipc_protocol_msg_prep(struct iosm_imem *ipc_imem,
|
||||
enum ipc_msg_prep_type msg_type,
|
||||
union ipc_msg_prep_args *args);
|
||||
|
||||
/**
|
||||
* ipc_protocol_msg_hp_update - Function for head pointer update
|
||||
* of message ring
|
||||
* @ipc_imem: iosm_protocol instance
|
||||
*/
|
||||
void ipc_protocol_msg_hp_update(struct iosm_imem *ipc_imem);
|
||||
|
||||
/**
|
||||
* ipc_protocol_msg_process - Function for processing responses
|
||||
* to IPC messages
|
||||
* @ipc_imem: iosm_protocol instance
|
||||
* @irq: IRQ vector
|
||||
*
|
||||
* Return: True on success, false if error
|
||||
*/
|
||||
bool ipc_protocol_msg_process(struct iosm_imem *ipc_imem, int irq);
|
||||
|
||||
/**
|
||||
* ipc_protocol_ul_td_send - Function for sending the data to CP
|
||||
* @ipc_protocol: iosm_protocol instance
|
||||
* @pipe: Pipe instance
|
||||
* @p_ul_list: uplink sk_buff list
|
||||
*
|
||||
* Return: true in success, false in case of error
|
||||
*/
|
||||
bool ipc_protocol_ul_td_send(struct iosm_protocol *ipc_protocol,
|
||||
struct ipc_pipe *pipe,
|
||||
struct sk_buff_head *p_ul_list);
|
||||
|
||||
/**
|
||||
* ipc_protocol_ul_td_process - Function for processing the sent data
|
||||
* @ipc_protocol: iosm_protocol instance
|
||||
* @pipe: Pipe instance
|
||||
*
|
||||
* Return: sk_buff instance
|
||||
*/
|
||||
struct sk_buff *ipc_protocol_ul_td_process(struct iosm_protocol *ipc_protocol,
|
||||
struct ipc_pipe *pipe);
|
||||
|
||||
/**
|
||||
* ipc_protocol_dl_td_prepare - Function for providing DL TDs to CP
|
||||
* @ipc_protocol: iosm_protocol instance
|
||||
* @pipe: Pipe instance
|
||||
*
|
||||
* Return: true in success, false in case of error
|
||||
*/
|
||||
bool ipc_protocol_dl_td_prepare(struct iosm_protocol *ipc_protocol,
|
||||
struct ipc_pipe *pipe);
|
||||
|
||||
/**
|
||||
* ipc_protocol_dl_td_process - Function for processing the DL data
|
||||
* @ipc_protocol: iosm_protocol instance
|
||||
* @pipe: Pipe instance
|
||||
*
|
||||
* Return: sk_buff instance
|
||||
*/
|
||||
struct sk_buff *ipc_protocol_dl_td_process(struct iosm_protocol *ipc_protocol,
|
||||
struct ipc_pipe *pipe);
|
||||
|
||||
/**
|
||||
* ipc_protocol_get_head_tail_index - Function for getting Head and Tail
|
||||
* pointer index of given pipe
|
||||
* @ipc_protocol: iosm_protocol instance
|
||||
* @pipe: Pipe Instance
|
||||
* @head: head pointer index of the given pipe
|
||||
* @tail: tail pointer index of the given pipe
|
||||
*/
|
||||
void ipc_protocol_get_head_tail_index(struct iosm_protocol *ipc_protocol,
|
||||
struct ipc_pipe *pipe, u32 *head,
|
||||
u32 *tail);
|
||||
/**
|
||||
* ipc_protocol_get_ipc_status - Function for getting the IPC Status
|
||||
* @ipc_protocol: iosm_protocol instance
|
||||
*
|
||||
* Return: Returns IPC State
|
||||
*/
|
||||
enum ipc_mem_device_ipc_state ipc_protocol_get_ipc_status(struct iosm_protocol
|
||||
*ipc_protocol);
|
||||
|
||||
/**
|
||||
* ipc_protocol_pipe_cleanup - Function to cleanup pipe resources
|
||||
* @ipc_protocol: iosm_protocol instance
|
||||
* @pipe: Pipe instance
|
||||
*/
|
||||
void ipc_protocol_pipe_cleanup(struct iosm_protocol *ipc_protocol,
|
||||
struct ipc_pipe *pipe);
|
||||
|
||||
/**
|
||||
* ipc_protocol_get_ap_exec_stage - Function for getting AP Exec Stage
|
||||
* @ipc_protocol: pointer to struct iosm protocol
|
||||
*
|
||||
* Return: returns BOOT Stages
|
||||
*/
|
||||
enum ipc_mem_exec_stage
|
||||
ipc_protocol_get_ap_exec_stage(struct iosm_protocol *ipc_protocol);
|
||||
|
||||
/**
|
||||
* ipc_protocol_pm_dev_get_sleep_notification - Function for getting Dev Sleep
|
||||
* notification
|
||||
* @ipc_protocol: iosm_protocol instance
|
||||
*
|
||||
* Return: Returns dev PM State
|
||||
*/
|
||||
u32 ipc_protocol_pm_dev_get_sleep_notification(struct iosm_protocol
|
||||
*ipc_protocol);
|
||||
#endif
|
||||
Loading…
Reference in a new issue