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Message-ID: <559c1c08.4a838c0a.a48ee.ffffe74d@mx.google.com>
Date: Tue, 07 Jul 2015 11:35:52 -0700 (PDT)
From: Yasuaki Ishimatsu <yasu.isimatu@...il.com>
To: Taku Izumi <izumi.taku@...fujitsu.com>
Cc: netdev@...r.kernel.org, davem@...emloft.net,
platform-driver-x86@...r.kernel.org, dvhart@...radead.org,
rkhan@...hat.com, alexander.h.duyck@...hat.com,
linux-acpi@...r.kernel.org, joe@...ches.com,
sergei.shtylyov@...entembedded.com, stephen@...workplumber.org
Subject: Re: [PATCH v2 06/22] fjes: buffer address regist/unregistration
routine
On Wed, 24 Jun 2015 11:55:38 +0900
Taku Izumi <izumi.taku@...fujitsu.com> wrote:
> 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/net/fjes/fjes_hw.c | 187 +++++++++++++++++++++++++++++++++++++++++++++
> drivers/net/fjes/fjes_hw.h | 9 ++-
> 2 files changed, 195 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/fjes/fjes_hw.c b/drivers/net/fjes/fjes_hw.c
> index 1ffa62e..4451e70 100644
> --- a/drivers/net/fjes/fjes_hw.c
> +++ b/drivers/net/fjes/fjes_hw.c
> @@ -453,6 +453,193 @@ 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;
fjes_hw_unregister_buff_addr() has same implemetation.
How about preparing new function to unify them?
Thanks,
Yasuaki Ishimatsu
> +}
> +
> +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 || !res_buf || !share)
> + 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/net/fjes/fjes_hw.h b/drivers/net/fjes/fjes_hw.h
> index 2ee166a..d1321e8 100644
> --- a/drivers/net/fjes/fjes_hw.h
> +++ b/drivers/net/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)
> @@ -266,7 +271,9 @@ 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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