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Message-Id: <1434588587-25655-6-git-send-email-izumi.taku@jp.fujitsu.com>
Date: Thu, 18 Jun 2015 09:49:31 +0900
From: Taku Izumi <izumi.taku@...fujitsu.com>
To: platform-driver-x86@...r.kernel.org, dvhart@...radead.org
Cc: rkhan@...hat.com, alexander.h.duyck@...hat.com,
netdev@...r.kernel.org, linux-acpi@...r.kernel.org,
Taku Izumi <izumi.taku@...fujitsu.com>
Subject: [PATCH 06/22] fjes: buffer address regist/unregistration routine
This patch adds buffer address regist/unregistration routine.
This function is mainly invoked when network device's
activation (open) and deactivation (close)
in order to retist/unregist shared buffer address.
Signed-off-by: Taku Izumi <izumi.taku@...fujitsu.com>
---
drivers/platform/x86/fjes/fjes_hw.c | 189 ++++++++++++++++++++++++++++++++++++
drivers/platform/x86/fjes/fjes_hw.h | 9 +-
2 files changed, 197 insertions(+), 1 deletion(-)
diff --git a/drivers/platform/x86/fjes/fjes_hw.c b/drivers/platform/x86/fjes/fjes_hw.c
index eb04d9a..5c68541 100644
--- a/drivers/platform/x86/fjes/fjes_hw.c
+++ b/drivers/platform/x86/fjes/fjes_hw.c
@@ -461,6 +461,195 @@ int fjes_hw_request_info(struct fjes_hw *hw)
return result;
}
+int fjes_hw_register_buff_addr(struct fjes_hw *hw, int dest_epid,
+ struct ep_share_mem_info *buf_pair)
+{
+ union fjes_device_command_req *req_buf = hw->hw_info.req_buf;
+ union fjes_device_command_res *res_buf = hw->hw_info.res_buf;
+ enum fjes_dev_command_response_e ret;
+ int i, idx;
+ int page_count;
+ void *addr;
+ int timeout;
+ int result;
+
+ if (test_bit(dest_epid, &hw->hw_info.buffer_share_bit))
+ return 0;
+
+ memset(req_buf, 0, hw->hw_info.req_buf_size);
+ memset(res_buf, 0, hw->hw_info.res_buf_size);
+
+ req_buf->share_buffer.length =
+ FJES_DEV_COMMAND_SHARE_BUFFER_REQ_LEN(buf_pair->tx.size,
+ buf_pair->rx.size);
+ req_buf->share_buffer.epid = dest_epid;
+
+ idx = 0;
+ req_buf->share_buffer.buffer[idx++] = buf_pair->tx.size;
+ page_count = buf_pair->tx.size / EP_BUFFER_INFO_SIZE;
+ for (i = 0; i < page_count; i++) {
+ addr = ((u8 *)(buf_pair->tx.buffer)) +
+ (i * EP_BUFFER_INFO_SIZE);
+ req_buf->share_buffer.buffer[idx++] =
+ (__le64)(page_to_phys(vmalloc_to_page(addr)) +
+ offset_in_page(addr));
+ }
+
+ req_buf->share_buffer.buffer[idx++] = buf_pair->rx.size;
+ page_count = buf_pair->rx.size / EP_BUFFER_INFO_SIZE;
+ for (i = 0; i < page_count; i++) {
+ addr = ((u8 *)(buf_pair->rx.buffer)) +
+ (i * EP_BUFFER_INFO_SIZE);
+ req_buf->share_buffer.buffer[idx++] =
+ (__le64)(page_to_phys(vmalloc_to_page(addr)) +
+ offset_in_page(addr));
+ }
+
+ res_buf->share_buffer.length = 0;
+ res_buf->share_buffer.code = 0;
+
+ ret = fjes_hw_issue_request_command(hw, FJES_CMD_REQ_SHARE_BUFFER);
+
+ timeout = FJES_COMMAND_REQ_BUFF_TIMEOUT * 1000;
+ while ((ret == FJES_CMD_STATUS_NORMAL) &&
+ (res_buf->share_buffer.length ==
+ FJES_DEV_COMMAND_SHARE_BUFFER_RES_LEN) &&
+ (res_buf->share_buffer.code == FJES_CMD_REQ_RES_CODE_BUSY) &&
+ (timeout > 0)) {
+
+ msleep(200 + hw->my_epid * 20);
+ timeout -= (200 + hw->my_epid * 20);
+
+ res_buf->share_buffer.length = 0;
+ res_buf->share_buffer.code = 0;
+
+ ret = fjes_hw_issue_request_command(hw,
+ FJES_CMD_REQ_SHARE_BUFFER);
+ }
+
+ result = 0;
+
+ if (res_buf->share_buffer.length !=
+ FJES_DEV_COMMAND_SHARE_BUFFER_RES_LEN)
+ result = -ENOMSG;
+ else if (ret == FJES_CMD_STATUS_NORMAL) {
+ switch (res_buf->share_buffer.code) {
+ case FJES_CMD_REQ_RES_CODE_NORMAL:
+ result = 0;
+ set_bit(dest_epid, &hw->hw_info.buffer_share_bit);
+ break;
+ case FJES_CMD_REQ_RES_CODE_BUSY:
+ result = -EBUSY;
+ break;
+ default:
+ result = -EPERM;
+ break;
+ }
+ } else {
+ switch (ret) {
+ case FJES_CMD_STATUS_UNKNOWN:
+ result = -EPERM;
+ break;
+ case FJES_CMD_STATUS_TIMEOUT:
+ result = -EBUSY;
+ break;
+ case FJES_CMD_STATUS_ERROR_PARAM:
+ case FJES_CMD_STATUS_ERROR_STATUS:
+ default:
+ result = -EPERM;
+ break;
+ }
+ }
+
+ return result;
+}
+
+int fjes_hw_unregister_buff_addr(struct fjes_hw *hw, int dest_epid)
+{
+ union fjes_device_command_req *req_buf = hw->hw_info.req_buf;
+ union fjes_device_command_res *res_buf = hw->hw_info.res_buf;
+ struct fjes_device_shared_info *share = hw->hw_info.share;
+ enum fjes_dev_command_response_e ret;
+ int result;
+ int timeout;
+
+
+ if (!hw->base)
+ return -EPERM;
+
+ if (req_buf == NULL || res_buf == NULL || share == NULL)
+ return -EPERM;
+
+ if (!test_bit(dest_epid, &hw->hw_info.buffer_share_bit))
+ return 0;
+
+ memset(req_buf, 0, hw->hw_info.req_buf_size);
+ memset(res_buf, 0, hw->hw_info.res_buf_size);
+
+ req_buf->unshare_buffer.length =
+ FJES_DEV_COMMAND_UNSHARE_BUFFER_REQ_LEN;
+ req_buf->unshare_buffer.epid = dest_epid;
+
+ res_buf->unshare_buffer.length = 0;
+ res_buf->unshare_buffer.code = 0;
+
+ ret = fjes_hw_issue_request_command(hw, FJES_CMD_REQ_UNSHARE_BUFFER);
+
+ timeout = FJES_COMMAND_REQ_BUFF_TIMEOUT * 1000;
+ while ((ret == FJES_CMD_STATUS_NORMAL) &&
+ (res_buf->unshare_buffer.length ==
+ FJES_DEV_COMMAND_UNSHARE_BUFFER_RES_LEN) &&
+ (res_buf->unshare_buffer.code ==
+ FJES_CMD_REQ_RES_CODE_BUSY) &&
+ (timeout > 0)) {
+
+ msleep(200 + hw->my_epid * 20);
+ timeout -= (200 + hw->my_epid * 20);
+
+ res_buf->unshare_buffer.length = 0;
+ res_buf->unshare_buffer.code = 0;
+
+ ret = fjes_hw_issue_request_command(hw,
+ FJES_CMD_REQ_UNSHARE_BUFFER);
+ }
+
+ result = 0;
+
+ if (res_buf->unshare_buffer.length !=
+ FJES_DEV_COMMAND_UNSHARE_BUFFER_RES_LEN) {
+ result = -ENOMSG;
+ } else if (ret == FJES_CMD_STATUS_NORMAL) {
+ switch (res_buf->unshare_buffer.code) {
+ case FJES_CMD_REQ_RES_CODE_NORMAL:
+ result = 0;
+ clear_bit(dest_epid, &hw->hw_info.buffer_share_bit);
+ break;
+ case FJES_CMD_REQ_RES_CODE_BUSY:
+ result = -EBUSY;
+ break;
+ default:
+ result = -EPERM;
+ break;
+ }
+ } else {
+ switch (ret) {
+ case FJES_CMD_STATUS_UNKNOWN:
+ result = -EPERM;
+ break;
+ case FJES_CMD_STATUS_TIMEOUT:
+ result = -EBUSY;
+ break;
+ case FJES_CMD_STATUS_ERROR_PARAM:
+ case FJES_CMD_STATUS_ERROR_STATUS:
+ default:
+ result = -EPERM;
+ break;
+ }
+ }
+
+ return result;
+}
+
void fjes_hw_set_irqmask(struct fjes_hw *hw, enum REG_ICTL_MASK intr_mask,
bool mask)
{
diff --git a/drivers/platform/x86/fjes/fjes_hw.h b/drivers/platform/x86/fjes/fjes_hw.h
index 7861fe3..2528992 100644
--- a/drivers/platform/x86/fjes/fjes_hw.h
+++ b/drivers/platform/x86/fjes/fjes_hw.h
@@ -34,11 +34,13 @@ struct fjes_hw;
#define FJES_DEVICE_RESET_TIMEOUT ((17 + 1) * 3) /* sec */
#define FJES_COMMAND_REQ_TIMEOUT (5 + 1) /* sec */
+#define FJES_COMMAND_REQ_BUFF_TIMEOUT (8 * 3) /* sec */
#define FJES_CMD_REQ_ERR_INFO_PARAM (0x0001)
#define FJES_CMD_REQ_ERR_INFO_STATUS (0x0002)
#define FJES_CMD_REQ_RES_CODE_NORMAL (0)
+#define FJES_CMD_REQ_RES_CODE_BUSY (1)
#define EP_BUFFER_SIZE \
(((sizeof(union ep_buffer_info) + (128 * (64 * 1024))) \
@@ -59,6 +61,9 @@ struct fjes_hw;
#define FJES_DEV_COMMAND_INFO_RES_LEN(epnum) (8 + 2*(epnum))
#define FJES_DEV_COMMAND_SHARE_BUFFER_REQ_LEN(txb, rxb) \
(24 + (8 * ((txb)/EP_BUFFER_INFO_SIZE + (rxb)/EP_BUFFER_INFO_SIZE)))
+#define FJES_DEV_COMMAND_SHARE_BUFFER_RES_LEN (8)
+#define FJES_DEV_COMMAND_UNSHARE_BUFFER_REQ_LEN (8)
+#define FJES_DEV_COMMAND_UNSHARE_BUFFER_RES_LEN (8)
#define FJES_DEV_REQ_BUF_SIZE(maxep) \
FJES_DEV_COMMAND_SHARE_BUFFER_REQ_LEN(EP_BUFFER_SIZE, EP_BUFFER_SIZE)
@@ -270,7 +275,9 @@ int fjes_hw_init(struct fjes_hw *);
void fjes_hw_exit(struct fjes_hw *);
int fjes_hw_reset(struct fjes_hw *);
int fjes_hw_request_info(struct fjes_hw *);
-
+int fjes_hw_register_buff_addr(struct fjes_hw *, int,
+ struct ep_share_mem_info *);
+int fjes_hw_unregister_buff_addr(struct fjes_hw *, int);
void fjes_hw_init_command_registers(struct fjes_hw *,
struct fjes_device_command_param *);
void fjes_hw_setup_epbuf(struct epbuf_handler *, u8 *, u32);
--
1.8.3.1
--
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